Bibliography
This is an automatically generated bibliography describing the content of this study carrel.
- ap-1000
- author: Ficker, T.
- title: Statistics of Electron Avalanches and Streamers
- date: 2007-01-06
- words: 3194
- flesch: 67
- summary: Assuming linear proportionality u c n� � , our curve w(u) will preserve the same shape as that of Furry w n n D( ) ( )� � � �const 1 , i.e. they will both possess the same value of the exponent (1+D). After passing a certain initial distance � � 0 and gathering a certain number of ener- getic electrons N d� �e� 1, which are capable of creating a group of UV photons, a photoionisation process starts and a swarm of K � 1smaller avalanches with mean pop- ulations nd d , ( ) 1 � �e� � appear along the parent ava- lanche.
- keywords: avalanches; d j; data; distribution; e �; electron; ficker; fig; fractal; furry; generation; j j; law; multiplication; n d; n n; new; nonnenmacher; parent; pareto; pattern; phys; populated; populations; probability; statistical; streamer; vol
- versions: original; plain text
- ap-1002
- author: Frank, H.
- title: Influence of Oxidation Media on the Transport Properties of Thin Oxide Layers of Zirconium Alloys
- date: 2007-01-06
- words: 4923
- flesch: 62
- summary: c� � �2 , but with negative coeffi- cient a. If the voltage is switched off, and the sample is short-circuited, there flows an adequate extraction current I Iex in� � of opposite polarity [13] of the form I B t nex � � � .
- keywords: acta; activation; air; characteristics; charge; circuit; constant; contact; current; dependence; electrode; energy; fig; greater; grey; higher; injection; layer; limited; linear; measured; oxidation; oxide; permittivity; phase; relative; resistance; resistivity; room; samples; short; space; steam; table; temperature; time; voltage; white; zirconium; zr1nb; zry-4w
- versions: original; plain text
- ap-1004
- author: Chmelík, T.; Zámyslický, P.
- title: EU Emissions Trading Scheme as Implemented in the Czech Republic
- date: 2007-01-06
- words: 1841
- flesch: 52
- summary: The system is based on the following five pillars: � Allocation (a system of distribution of emission allowances to participants, based on harmonized criteria). No. 6/2007 Share of total emissions Number of installations Public energy production (Utilities) 66.59 % 139 Corporate energy production 3.53 % 135 Refineries 1.10 % 4 Chemicals 5.28 % 17 Coke 0.26 % 2 Production and processing of metals 16.22 % 19 Cement 2.95 % 6 Lime 1.34 % 5 Glass 0.84 % 21 Ceramics 0.78 % 60 Pulp 0.19 % 2 Paper and board 0.91 % 16 Total 426 Source: Ministry of the Environment, 2005 Table 1: NAP for the Czech Republic, by sector 0 00
- keywords: allocation; allowances; co2; company; criteria; czech; emissions; energy; ets; european; installations; nap; national; number; paper; participants; plan; production; republic; scheme; sector; share; system; total; trading
- versions: original; plain text
- ap-1005
- author: Okurka, T.
- title: Wireless Telegraphy at the German Universal Exhibition in Ústí nad Labem in 1903 [1]
- date: 2008-01-03
- words: 1750
- flesch: 62
- summary: [1] T. Okurka This paper focuses on the transmission of wireless telegraphy between Ústí nad Labem and Teplice during the German Universal Exhibition in Ústí nad Labem in 1903. This oblivion can also be explained by the fact that wireless telegraphy was not widely used after the presentation in Ústí nad Labem.
- keywords: austria; bohemia; czech; device; exhibition; fig; für; german; labem; nad; nad labem; pavilion; station; successful; technical; telegraphy; teplice; transmission; universal; vol; wireless; zeitschrift; ústí; ústí nad
- versions: original; plain text
- ap-1006
- author: Kohout, K.; Nahodil, P.
- title: Simulation Environment for Artificial Creatures
- date: 2007-01-06
- words: 4131
- flesch: 60
- summary: This internal state covers the state of agent sensors and effectors (some of these may be damaged or partial by malfunctioning) and the Vege- tative System Block. It can be used to observe agent parameters at any time of simulation.
- keywords: abstract; actions; agent; analysis; architecture; artificial; behavior; body; communication; control; czech; data; different; effectors; engine; environment; etc; example; external; fig; information; interface; internal; layers; life; mind; modules; new; physical; prague; run; sensors; simulation; step; task; technical; university; use; value; visualization; wal; world
- versions: original; plain text
- ap-1007
- author: Behrens, A.; Atorf, L.; Schwann, R.; Ballé, J.; Herold, T.; Telle, A.
- title: First Steps into Practical Engineering for Freshman Students Using MATLAB and LEGO Mindstorms Robots
- date: 2008-01-03
- words: 4024
- flesch: 51
- summary: Thus it is very impor- tant to motivate first semester students by confronting them with practical situations, in which they “feel like engineers” right from the beginning of their studies [2]. 48 No. 3/2008 First Steps into Practical Engineering for Freshman Students Using MATLAB and LEGO Mindstorms Robots A. Behrens, L. Atorf, R. Schwann, J. Ballé, T. Herold, A. Telle Besides lectures on basic theoretical topics, contemporary teaching and learning concepts for first semester students give more and more consideration to practically motivated courses.
- keywords: aachen; addition; algorithms; applications; available; basic; bluetooth; communication; complex; computer; concept; course; developed; direct; electrical; engineering; evaluation; exercises; fig; functions; hardware; image; individual; interface; laboratory; learning; lego; level; major; mathematical; matlab; methods; mindstorms; new; nxt; online; practical; process; processing; programming; project; real; results; robot; rwth; section; semester; sensor; skills; software; students; tasks; team; time; toolbox; university; vol
- versions: original; plain text
- ap-1008
- author: Holub, J.
- title: Finite Automata Implementations Considering CPU Cache
- date: 2007-01-06
- words: 3413
- flesch: 70
- summary: Suitable im- plementations are described in Section 5. 2 Nondeterministic finite automaton Nondeterministic finite automaton (NFA) is a quintuple (Q, �, �, q0, F), where Q is a finite set of states, � is a set of input sym- bols, � is a mapping � �Q Q� ( ) ( )� � �� � , q Q0 � is an initial state, and F Q� is a set of final states. AP_07_6.vp 1 Introduction The original formal study of finite state systems (neural nets) is from 1943 by McCulloch and Pitts [14].
- keywords: approach; automata; automaton; cache; case; cpu; current; cycles; czech; dfa; eds; fig; finite; hard; holub; implementation; input; memory; nfa; number; run; simulation; state; string; suffix; suitable; symbol; table; technical; time; transition; university; vol
- versions: original; plain text
- ap-1010
- author: Teng, C. P.; Bai, S.; Angeles, J.
- title: Shape Synthesis in Mechanical Design
- date: 2007-01-06
- words: 4973
- flesch: 68
- summary: Specifically, these con- straints are, � �0( , , )� � �� �� � A , � �n B� � �� �1( , , )� � � , (18) where �A and �B are the curvature values of curve �a at point A and of curve �b at point B, respectively, thereby formulating an equality constrained optimum-design problem. Further, we define the n � 2-dimensional vectors, �, �� and ��� , namely, � � �� � � �0 1 1, , , ,� n n T (1) � � � � � � �� � � � �0 1 1, , , ,� n n T (2) �� � �� �� �� �� �� � � � �0 1 1, , , ,� n n T (3) Letting � �k( ) be the cubic polynomial between two consec- utive supporting points
- keywords: 6/2007; a0 �; acta; agile; angeles; blending; continuity; coordinates; cross; cubic; curvature; curve; czech; design; fig; geometric; house; housing; http://ctn.cvut.cz/ap/; k k; lamé; link; mid; non; optimization; optimum; parametric; points; polytechnica; problem; publishing; radius �; section; segment; shape; splines; stress; structural; supporting; synthesis; tan �; technical; university; values; vol; wrist; � c; � k; � n; � y; � �
- versions: original; plain text
- ap-1013
- author: Behrens, A.
- title: Creating Panoramic Images for Bladder Fluorescence Endoscopy
- date: 2008-01-03
- words: 3270
- flesch: 57
- summary: An external camera is attached at the tail end of the rigid cystoscope, as shown in Fig. 2, and captures video images with a resolution of 720×576 pixels at a frame rate of 25 frames per second. A software implementation in C�� should improve the per- formance, and will be applied in future work.
- keywords: affine; algorithm; bladder; cancer; correspondences; cystoscopy; descriptor; detection; endoscopic; feature; field; fig; frames; homography; illumination; image; interpolation; invariant; local; matching; method; model; mosaicing; panoramic; pdd; point; process; region; results; scale; section; sequence; sift; small; step; stitching; technical; transform; university; urinary; video; vol; � �
- versions: original; plain text
- ap-1015
- author: Stache, N. C.; Nguyen, T. P.
- title: Automatic Compensation of Workpiece Positioning Tolerances for Precise Laser
- date: 2008-01-03
- words: 4410
- flesch: 59
- summary: Thus, the problem to be minimized can be formulated as Q B B B B BT T T( ) ( ) minu u u u u u� � � �2 2 , (5) with the constraint of u 2 1� to avoid obtaining the trivial so- lution. The use of line-shaped profiles for contour point de- tection instead of entire images or ROIs permits a speed up, which is required for executing one detection and welding cycle per second (detection with a standard PC, 2.6 GHz, Dual-Core, C�� implementation).
- keywords: accuracy; acquisition; addition; algorithm; approach; beam; case; circle; contour; detection; determined; edge; end; estimation; feature; fig; filter; fitting; high; image; laser; line; machine; model; nominal; number; offset; parts; points; position; positioning; procedure; production; profiles; results; robust; roi; rotation; scanner; sought; step; system; technical; university; use; vol; welding; workpiece
- versions: original; plain text
- ap-1017
- author: Doutres, O.; Dauchez, N.; Genevaux, J.-M.; Dazel, O.
- title: Validity of the One-Dimensional Limp Model for Porous Media
- date: 2008-01-03
- words: 3573
- flesch: 63
- summary: (2) gives the propagation equation on uf ~ ~ limK u upf f f� � �2 2 0� � , (7) with ~ K f the bulk modulus of the air in the pores and ~ lim� p the modified density of the air. AP08_3.vp 1 Introduction In recent years, poroelastic numerical models using finite element method have been widely developed to improve the acoustic efficiency of porous materials used in the aeronautic and automotive industries.
- keywords: acoust; biot; boundary; bulk; critical; density; dimensional; displacement; fig; fluid; frame; frequency; fsi; fsir; influence; layer; limp; limp model; material; model; modulus; parameter; phase; porous; properties; radiation; ratio; soc; solid; stiffness; theory; value; vol; wave
- versions: original; plain text
- ap-1019
- author: Bednář, M.
- title: The Precision Simulation of the First Generation Matrix Converter
- date: 2008-01-03
- words: 1761
- flesch: 61
- summary: Keywords: Matrix converter, real-time system, simulation, energy conversion. Fig. 1: Configuration of the real system Fig. 2: Bidirectional switch configuration Fig. 48 No. 3/2008 The Precision Simulation of the First Generation Matrix Converter M. Bednář This paper describes simulation of first generation matrix converter, which was realized in the lab.
- keywords: 3/2008; acta; block; configuration; control; converter; current; czech; description; fig; fpga; generation; house; http://ctn.cvut.cz/ap/; matrix; output; polytechnica; program; publishing; real; simulation; switching; system; technical; time; university; vol; voltage; word
- versions: original; plain text
- ap-1021
- author: Steffen, M.; Leonhardt, S.
- title: Non-Contact Monitoring of Heart and Lung Activity by Magnetic Induction Measurement
- date: 2008-01-03
- words: 2258
- flesch: 56
- summary: (drift compensation Ch4. - Ch. 3) vs. heart reference (PPG) (Volunteer in back position) 5 Conclusion The elimination of electric contact between a medical de- vice and the patient’s body is a promising idea, and this paper presents one feasible approach to non-contact monitoring, based on magnetic induction. (Combination Ch. 4 + Ch. 6) vs. heart reference (PPG) (Volunteer lying on the right side) interference.
- keywords: 3/2008; acta; activity; body; channels; coils; contact; czech; excitation; field; fig; heart; house; http://ctn.cvut.cz/ap/; induced; induction; inductive; lung; magnetic; measurement; monitoring; polytechnica; ppg; publishing; reference; sensor; setup; signal; steffen; technical; university; volunteer
- versions: original; plain text
- ap-1023
- author: Řeřábek, M.
- title: Space Variant PSF – Deconvolution of Wide-Field Astronomical Images
- date: 2008-01-03
- words: 2309
- flesch: 58
- summary: 2 Transfer characteristics of optical imaging systems The description of transfer characteristics (mainly PSF) of optical imaging system is presented in the following section. This relation affects the transfer characteristics of optical systems and makes them spatially variant.
- keywords: aberrations; astronomical; bootes; characteristics; czech; data; deconvolution; double; fig; function; image; imaging; invariant; meteors; object; observation; optical; paper; processing; psf; response; space; system; transfer; university; use; uwfc; variant; wavefront; � �
- versions: original; plain text
- ap-1025
- author: Bauer, J.
- title: Single-Phase Pulse Width Modulated Rectifier
- date: 2008-01-03
- words: 2375
- flesch: 64
- summary: The power transferred from the supply to the input termi- nals of the rectifier is: P U U XSR s r s � sin � (1) � U Is s cos �, (2) where Us RMS value of input supply voltage (V), Ur RMS value of first harmonics consumed by AC rectifier input (V), � phase displacement between phasors Us a Ur, Xs input inductor reactance at 50Hz (�), � power factor.
- keywords: analysis; angle; consumed; consumption; control; converters; cos; current; czech; diagram; displacement; effects; electric; factor; fig; harmonics; input; modulation; network; output; phase; power; pulse; pwm; reactive; rectifier; sinusoidal; supply; supply voltage; technical; type; value; voltage; waveforms; width
- versions: original; plain text
- ap-1027
- author: Sokoll, J.; Fingerhuth, S.
- title: Psychoacoustic Properties of Fibonacci Sequences
- date: 2008-01-04
- words: 2440
- flesch: 58
- summary: Table 1 shows the binary Fibonacci Sequence for the first 8 years. The sequence of the number of pairs Fn is the original Fibonacci Sequence.
- keywords: adobe; binary; false; fibonacci; fibonacci sequence; fig; frequency; golden; immature; length; listening; number; pair; pass; pdf; peak; pitch; polytechnica; psychoacoustic; rabbits; ratio; results; sequence; sine; sound; spectrum; subjects; technical; tests; true; university; vol; year
- versions: original; plain text
- ap-1029
- author: Šimeček, I.
- title: Acceleration of Sparse Matrix-Vector Multiplication by Region Traversal
- date: 2008-01-04
- words: 4967
- flesch: 61
- summary: D I I( )� � . If � �n r, then the R-CSR format is chosen, otherwise the R-XY format is chosen.
- keywords: 4/2008; acta; adobe; algorithm; approach; array; box; cache; cbsa; common; csr; csr format; czech; data; elements; false; fig; fit; format; good; house; http://ctn.cvut.cz/ap/; large; locality; matrices; matrix; memory; misses; multiplication; nonzero; number; optimal; overhead; performance; polytechnica; publishing; ratio; region; row; size; sparse; speedup; spm×v; storage; strategy; technical; time; transformation; traversal; traversing; true; university; vector; vol
- versions: original; plain text
- ap-1031
- author: Jirout, T.; Fořt, I.
- title: An Investigation of the Erosion Wear of Pitched Blade Impellers in a Solid-Liquid Suspension
- date: 2008-01-04
- words: 4705
- flesch: 61
- summary: Pitched blade impellers with four adjustable inclined plane blades made from construction steel (pitch angle � � 30°), pumping downwards were investigated in a fully baffled flat bottomed cylindrical agitated vessel (vessel diame- ter T � 300 mm, four baffles of width b � 30 mm, impeller Keywords: pitched blade impeller, erosion wear, solid-liquid suspension. Fig.
- keywords: 4/2008; acta; average; blade; concentration; constant; corundum; czech; dependence; diameter; different; erosion; false; fig; geometric; house; http://ctn.cvut.cz/ap/; impeller; levels; min; parameter; particle; polytechnica; process; publishing; rate; solid; speed; suspension; table; technical; time; true; university; values; vol; volumetric; wear; weight
- versions: original; plain text
- ap-1033
- author: Klenko, Y.; Scholtz, V.
- title: Influence of a Point-to-Plane DC Negative Corona Discharge on Gel Surfaces
- date: 2008-01-04
- words: 2440
- flesch: 52
- summary: This paper focuses on an experimental investigation of the influence of the single-point and multi-point corona discharge electric field on gel surface. Each type of gel electrode was placed in a standard Petri dish (90 mm in diameter).
- keywords: adobe; agar; applications; atmospheric; corona; corona discharge; current; czech; deformation; dependence; depth; diameter; dimple; discharge; electrode; exposition; false; fig; gel; hollow; influence; ions; medium; min; needle; pdf; petri; plane; plasma; point; pressure; standard; surface; temperature; time; true; vol
- versions: original; plain text
- ap-1035
- author: Semančík, P.; Cimbala, R.; Záliš, K.
- title: Thermal – Oxidation Stability of Insulating Fluids
- date: 2008-01-04
- words: 2289
- flesch: 51
- summary: The test was carried out under the following conditions [1]: � temperature 100 °C, � volume of oil samples 5 l, � bubbling of oil dried and refined by air in larger amounts than are needed for reaction of oil with the air, � accelerator: copper wires in quantities cca 0.1 cm2/g mea- sured oil. Test conditions: The filtered fluid sample oxidizes under the following conditions [3]: � oil weight: 25 g � 0.1 g, � oxidation gas: air, � gas flow speed: 0.15 l/h � 0.015 l/h, � test period: � 164 h – for uninhibited oil, � 500 h – for inhibited oil, � accelerator: copper wires in quantities 28.6 cm2 � 0.3 cm2 measured oil.
- keywords: a.s; adobe; air; chamber; conditions; czech; dielectric; false; high; insoluble; insulating; method; oil; oils; orgrez; oxidation; parameters; pdf; polytechnica; sample; sediments; stability; technical; temperature; test; thermal; true; university; values; vol; čez
- versions: original; plain text
- ap-1039
- author: Fořt, I.; Hasal, P.; Paglianti, A.; Magelli, F.
- title: Axial Force at the Vessel Bottom Induced by Axial Impellers
- date: 2008-01-04
- words: 4478
- flesch: 55
- summary: It follows from Figs. 3 and 4 that the subregion between ra- dius r1 (R1) and radius r2 (R2) of the flow along the bottom practically diminishes at the level of impeller C T � 1 3. (2) Figs. 3 and 4 illustrate the above mentioned radial profiles of the mean time local dynamic pressure, always at two levels of impeller speed.
- keywords: adobe; agitated; axial; axial dynamic; blade; blade impeller; clearance; coordinate; cylindrical; czech; dimensionless; direction; distance; dynamic; dynamic pressures; experiments; false; fax; fax1; fig; figs; flat; flow; force; form; impeller; liquid; local; mean; mixing; pressure; profiles; quantity; radial; radius; rpmn �; speed; subregion; time; transducers; true; values; vessel; vol; wall
- versions: original; plain text
- ap-1041
- author: Frydrýšek, K.
- title: Probabilistic Analysis of the Hard Rock Disintegration Process
- date: 2008-01-04
- words: 3057
- flesch: 50
- summary: Keywords: Hard rock (ore), cutting bit, disintegration process, FEM, probability, SBRA method, parallel computing. The evaluation of one force measurement (Fig. 19) shows that the maximum force is RMAXEXP � 5280 N. Hence, the relative error calculated for the acquired median value RMAXSBRA, FEM MED� � 5068 N, see Fig. 18, is: �R R R RMAX � � � � � MAX MAX MAX EXP SBRA, FEM MED EXP 0 01 4 02 . .
- keywords: acta; adobe; application; bit; carlo; computers; cpu; czech; disintegration; elements; engineering; false; fem; fig; forces; fracture; house; http://ctn.cvut.cz/ap/; inputs; large; material; method; monte; msc.marc/mentat; ore; parallel; polytechnica; process; publishing; reaction; results; sbra; simulations; software; solution; stochastic; stress; technical; true; university; vol
- versions: original; plain text
- ap-1043
- author: Hilar, M.; Pruška, J.
- title: Statistical Analysis of Input Parameters Impact on the Modelling of Underground Structures
- date: 2008-01-05
- words: 3352
- flesch: 59
- summary: One way is to define the probability that a safety factor F is less than a prescribed value F0: P F F n N ( )� �0 , (2) where n � number of trials in which F < F0 , N � number of selections. 48 No. 5/2008 0.5�1 �0.5 0 1 0 F t( ) Range of the input parameters ´qi 0.5 0.6 0.8 1 0.4 0.2 �1 Fig. 2: Dividing the distribution function into intervals 0.45 0 0.4 0.35 0.25 0.15 0.05 0.3 0.2 0.1 Standard variable t f t( ) �3 �2 �1 0 1 2 3 Fig. 1: Probability density function – Gaussian distribution u u N i Ni � � �( )1 , (3) where i n� 1 2, , ,� (n number of values), u � a random number (u � 0 1, ), ui � random numbers in the i th interval, N � number of the non-overlaying intervals.
- keywords: acta; analysis; behaviour; carlo; classification; czech; engineering; excavation; fig; function; fuzzy; ground; house; http://ctn.cvut.cz/ap/; hypercube; input; interval; latin; mass; membership; method; modelling; monte; number; numerical; parameters; polytechnica; prague; probability; publishing; random; results; rock; sampling; set; sets; simulation; statistical; technical; tunnel; university; values; variable; vol
- versions: original; plain text
- ap-1045
- author: Jilemnická, L.; Berka, V.; Hromada, E.
- title: Development of Real Estate Market in the Czech Republic
- date: 2008-01-05
- words: 1727
- flesch: 62
- summary: The slow growth in interest rates slightly increases the ten- dency to sell older flats. A similar trend can also be observed in the tenancy of older flats.
- keywords: average; categories; category; czech; estate; fig; flats; floorage; market; metre; older; prague; prices; quotations; real; republic; software; square; technical; time; units; university
- versions: original; plain text
- ap-1047
- author: Prajzler, V.; Jeřábek, V.; Lyutakov, O.; Hüttel, I.; Špirková, J.; Machovič, V.; Oswald, J.; Chvostová, D.; Zavadil, J.
- title: Optical Properties of Erbium and Erbium/Ytterbium Doped Polymethylmethacrylate
- date: 2008-01-05
- words: 3795
- flesch: 72
- summary: � The content of Er3� and Er3� � Yb3� ions had a significant effect on the transmission spectra. Yb In d e x o f re fr a c ti o n (- ) Wavelength (nm) Fig. 6: Wavelength dependence of the refractive indices a) of the Er3� and b) Er3��Yb3� doped PMMA layers using erbium(III) and ytter- bium(III)
- keywords: acta; bands; czech; doped; earth; er3; erbium; erbium(iii; erf3; fig; house; http://ctn.cvut.cz/ap/; indices; ions; issue; journal; layers; materials; optical; pmma; polymer; polytechnica; properties; publishing; refractive; samples; spectra; technical; university; vol; wavelength; yb3; ytterbium; ytterbium(iii
- versions: original; plain text
- ap-1049
- author: Římal, J.; Šindler, D.
- title: Comparison of Temperature Loadings of Bridge Girders
- date: 2008-01-05
- words: 2808
- flesch: 52
- summary: Using reference temperature t f � 10 °C (tem- perature when the bridge girder was placed on the bearings), the uniform temperature components are as follows: �t t tmax max� � � � � � �0 40 10 30 °C �t t tmin Keywords: temperature loading, temperature gradients,bridge constructions, temperature difference components, deformation, temperature distribution, maximum moments from temperature loading. Fig. 1: Border bridge on the D8 motorway in summer and in winter 2.2 Loading according to ENV 1991-2-5 This standard groups structures for temperature loading into three types: � Type 1 – steel deck on steel girders.
- keywords: bridge; changes; component; composite; concrete; czech; deck; difference; direction; env; fig; girder; gradient; loading; moments; standard; steel; structure; technical; temperature; type; uniform; university; values; vertical; vol; čsn
- versions: original; plain text
- ap-1051
- author: Šimeček, I.
- title: Memory Hierarchy Behavior Study during the Execution of Recursive Linear Algebra Library
- date: 2008-01-05
- words: 2693
- flesch: 64
- summary: A B A B A B 1 2 1 2 gemm gemm ( , ) ( , ) C( ) , ( )k C C A A B B A A � � � � � � � � �� � �� � � � � 1 2 1 2 1 2 1 2 gemm � � � � � � � � ( ) ( , ) ( , ) B B A B A B A B A B 1 2 1 1 2 2 1 1 2 2gemm gemm 3.3 Compulsory misses During the execution of GEMM(A, B, C, i, j, k) routine all ele- ments from arrays A, B and C must be loaded or written to the cache. A B� � (abbreviated as GEMM, assuming the ordering of loops: i, j, k) is as follows: 3.2 Recursion in matrix-matrix multiplication Let us denote C(i) if the final result (matrix C) is computed from the recursion by i variable.
- keywords: acta; algebra; cache; codes; comparison; czech; data; different; fig; gemm; good; house; http://ctn.cvut.cz/ap/; implementation; linear; matrix; memory; multiplication; performance; polytechnica; procedure; ratio; recursive; size; technical; tlb; university; utilization; variants; vol
- versions: original; plain text
- ap-1053
- author: Rieger, F.
- title: Dissipative Heating in a Rotational Viscometer with Coaxial Cylinders
- date: 2008-01-05
- words: 2483
- flesch: 72
- summary: Using this model, the dependence of shear stress � on shear rate can be expressed by the relation: � �� K n� , (1) where K is the coefficient of consistency and n stands for the flow behaviour index. Using this model, the relation of shear stress � and shear rate �� can be expressed by the following relation: � � � �� �p� 0 for � �� 0, (2) where �0 is the yield stress and �p stands for plastic viscosity.
- keywords: cylinder; dimensionless; exp; inner; outer; pa �; shear; t h; t k; t t; temperature; y �; � fig
- versions: original; plain text
- ap-1055
- author: Svítek, M.
- title: Wave Probabilistic Model of Binary Time Series
- date: 2008-01-05
- words: 4987
- flesch: 69
- summary: A A A A r r n k r r r n k n 1 1 2 1 0 1 � � � � � � � � � � � � � � � A A2 2 0) ( )� � �� � N (10) which yields into form: P A A( )r r nn1 1 1 � �� � � � �� (11) where A r ii �� means the inversion state in comparison with A r ii �� on quantum object ( )� � i . i � � � � � � � � � � � � � 0 1 0 1 0 0 1 0 1 0 e e �1, (25) where �(.) are DFT transformed functions.
- keywords: binary; complex; e �; entanglement; equation; ergodic; events; exclusion; following; functions; inclusion; models; n n; non; objects; p(a; parameters; phase; position �; principle; probabilistic; probabilities; probability; quantum; series; state; theorem; time; vol; wave; � cos; � n
- versions: original; plain text
- ap-1057
- author: Khalil, S. A.; Fathy, A. M.
- title: An Empirical Method for Estimating Global Solar Radiation over Egypt
- date: 2008-01-05
- words: 3456
- flesch: 62
- summary: List of symbols Gc clear sky global solar radiation in kW/m 2, S sunshine duration in hours, N length of the daylight in hours, G0 extraterrestrial solar radiation on a horizontal sur- face in kW/m2, E0 correction factor of the Earth’s orbit, � sunrise/sunset hour angle, dn day number in the year (1 365� �dn ), � declination of the sun, � latitude of the station, � day angle in radiance, RMSE root mean square error, MBE mean bias error, n number of data pairs, � % absolute percentage error, Gm measured values of global solar radiation, Ges estimated values of global solar radiation. The linear relation correlating G G0 and S N is given in [4] as: G G a b S N0 � �{ ( )}.
- keywords: abu; best; data; different; egypt; empirical; energy; ges; global; global solar; halaib; lat; marsa; matruh; measured; method; radiation; shalatin; simble; sites; solar; solar radiation; values; vol
- versions: original; plain text
- ap-1059
- author: Novak, M.; Dolšak, B.
- title: An Intelligent System for Structural Analysis-Based Design Improvements
- date: 2008-01-06
- words: 4061
- flesch: 53
- summary: Keywords: computer-aided design, structural optimisation, knowledge based systems, decision support experience gained by many design iterations are of crucial importance. On the other hand, design changes are necessary for under-dimensioned structure, which cannot bear the loadings and will fail during its exploitation.
- keywords: 6/2008; acta; analysis; application; artificial; base; cad; changes; critical; czech; decision; design; designer; element; engineering; experience; fig; finite; help; hole; house; http://ctn.cvut.cz/ap/; improvement; intelligent; knowledge; optimisation; polytechnica; possible; process; propose; publishing; redesign; results; rules; software; steps; stress; structure; support; system; technical; university; user; vol
- versions: original; plain text
- ap-1061
- author: Škorpík, J.
- title: The Amount of Regenerated Heat Inside the Regenerator of a Stirling Engine
- date: 2008-01-06
- words: 3194
- flesch: 69
- summary: J/kg K, TH � 900 K, TC � 330 K, pmean � 15 MPa, VHC,max � 160 cm 3, VHD � 191 cm 3, VCD � 110 cm 3, VR � 28 cm 3, � � 105°) (b) – Q R, 0�� diagram for the same Stirling engine but in the case of V V VHD CD R� � � 0 cm 3 Qreg amount of regenerated heat inside the regenerator in case (a). 48 No. 6/2008 Volume of the hot side V V VH HC HD( ) ( )� �� � .
- keywords: assumptions; cold; crank; cycle; energy; engine; equation; fig; gas; heat; hot; idealization; max; regenerator; schmidt; stirling; temperature; volume; working
- versions: original; plain text
- ap-1063
- author: Lidmila, M.; Horníček, L.; Krejčiříková, H.; Tyc, P.
- title: Prerequisites for Increasing the Axle Load on Railway Tracks in the Czech Republic
- date: 2008-01-06
- words: 3439
- flesch: 62
- summary: The allow- able load per linear meter for track load class D3 is 7.2 t�m�1, and for track load class D4 the allowable load per linear meter is 8.0 t�m�1. 143 % 150 % Table 3: Results of deflection measurements on track bed model 30SD E25 22.5 t corresponds to track load classes D3 and D4.
- keywords: axle; axle load; bearing; bed; capacity; corridor; czech; deflection; experimental; fig; gravel; increase; layer; load; loading; model; mpa; permanent; rail; railway; republic; sleeper; substructure; table; technical; thickness; track; values
- versions: original; plain text
- ap-1065
- author: Zemanová, A.; Zeman, J.; Šejnoha, M.
- title: Simple Numerical Model of Laminated Glass Beams
- date: 2008-01-06
- words: 3554
- flesch: 59
- summary: x x xe i e i e i e i e i) ( ) , ( ) ( ) ,, ( ) , ( ) ( ) , ( ) , ( )� �N r N r� � � � � � � � � �e i e i e i e i e i ex x x x ( ) , ( ) , ( ) ( ) , ( )( ) ( ) , ( ) ( )� �N r N r , ( ) ,� i where e is used to denote the element number, �e and �e denote a relevant searched and test field restricted to the e-th element, Ne i ,• ( ) is the associated matrix of the basis functions and re i ,• ( ) is the matrix of nodal unknowns. i e w iR � � � � � � � � , where K Kew i we i( ) ( )( )� T and � r re i e ai e bi e ai e bi e w e au u w w( ) ,( ) ,( ) ,( ) ,( ) , ,, , , , ,� �� � T � e b, .
- keywords: acta; analysis; analytical; beam; behavior; czech; discretization; e e; e w; element; experimental; fig; finite; form; glass; independent; laminated; layer; layered; load; method; model; numerical; polytechnica; results; section; strain; structures; thickness; vol
- versions: original; plain text
- ap-1067
- author: Frank, H.
- title: Influence of Simulated LOCA on the Properties of Zircaloy Oxide Layers
- date: 2008-01-06
- words: 2150
- flesch: 61
- summary: c� � �2 , (1) allowing computation of resistivity �, mobility � and carrier concentration n. 4 Results and discussion Further details concerning the theoretical aspects are given in [3, 4]. steam 1200 3 78.79 3a Zry-4W 3744337 steam 1200 3 78.74 Table 1: Characterization of Samples 0 10 20 30 40 50 60 70 0 20 40 60 80 100 voltage (V) c u rr e n t (p A ) Zr1Nb (1200), Ag, T (°C)
- keywords: characteristics; charge; current; energy; extraction; fig; high; injection; layer; linear; oxide; oxidized; pre; properties; resistivity; samples; space; steam; temperature; voltage; zr1nb; zry-4w
- versions: original; plain text
- ap-1069
- author: Dočekal, A.; Kreidl, M.; Šmíd, R.
- title: Evaluation of Methods used for Separation of Vibrations Produced by Gear Transmissions
- date: 2008-01-06
- words: 5396
- flesch: 60
- summary: Feature selection methods are therefore used that can find a suboptimal solution only, but their computation is less de- manding. 3.1 Branch and Bound Feature Selection The Brand and Bound Feature Selection (BBFS) method is a method of feature selection designed to select features valid for solving the task from the set of given features.
- keywords: algorithm; applied; case; class; computing; criterion; czech; data; datasets; different; error; evaluation; experiment; feature; feature selection; fig; frequency; function; game; gear; gear transmission; gearbox; genetic; group; load; methods; mia; models; multiple; number; power; process; rate; results; search; selection; separation; sermd; set; signal; space; state; technical; testing; time; torque; transmission; university; value; vibration; vibration signal; vol
- versions: original; plain text
- ap-1071
- author: Vacek, J.; Vacek, J.; Chocholoušová, J.
- title: Rock Burst Mechanics: Insight from Physical and Mathematical Modelling
- date: 2008-01-06
- words: 2745
- flesch: 69
- summary: For rock bursts (also called bumps) to occur, the rock has to possess certain particular rock burst properties leading to accumulation of energy and the potential to release this energy. We observed the mechanism and the history of coal rock bursts.
- keywords: 6/2008; acta; bump; burst; cell; coal; cycles; czech; distribution; experimental; fig; force; house; http://ctn.cvut.cz/ap/; loading; mass; material; mathematical; meters; mining; modelling; particles; photo; polytechnica; properties; publishing; rock; seam; stress; technical; time; university; vacek; vol
- versions: original; plain text
- ap-1073
- author: Štancl, J.; Skočilas, J.; Šesták, J.; Žitný, R.
- title: Properties of Starch Based Foams Made by Thermal Pressure Forming
- date: 2008-01-06
- words: 6710
- flesch: 61
- summary: * * * ( )1 1 1 1 1 * * , 1 1 1� � � � � � � � �h a s (5) where h* is the relative thickness of an idealized compact crust without pores, and � �� �f ( )*1 h is the mean porosity of the whole sandwich plate. The nonlinear parameter yc was identified by a linear search, so that the criterion s2 was minimized � �s
- keywords: 6/2008; acta; analysis; conductivity; constant; contact; corresponding; crust; czech; density; direct; electric; electrodes; engineering; evaluated; experiments; fig; foam; food; fraction; heated; heating; house; http://ctn.cvut.cz/ap/; indirect; journal; manufactured; mass; mean; mold; ohmic; parameters; pixels; plates; polytechnica; porosity; potato; process; products; properties; publishing; results; sample; sandwich; specific; starch; suspension; table; tanh; technical; temperature; thermal; thermal conductivity; thickness; time; university; values; vol; water
- versions: original; plain text
- ap-1075
- author: Macek, K.
- title: Pareto Principle in Datamining: an Above-Average Fencing Algorithm
- date: 2008-01-06
- words: 3042
- flesch: 64
- summary: The Pareto principle arises if there is a set P X� where p P X P P X X ( , ) ( ) ( ) ( ) ( ) � � �� � � � � 1 (1) and r P P X( ) ( ) ( )� ��� � 0. O i� � � � � � � � � � � � ( ) ( ) , cc is the complement coding cc : � �n n� 2 and k is a parameter.
- keywords: acta; algorithm; approach; attributes; average; binary; categorical; clustering; czech; data; datamining; fencing; high; http://ctn.cvut.cz/ap/; input; insurance; intervals; mapping; means; methods; new; numerical; pair; pareto; polytechnica; principle; problem; production; results; set; sets; size; subset; table; technical; university; validation; variables; vol
- versions: original; plain text
- ap-1077
- author: Correia, António J. P. Moura; Rodrigues, Joao Paulo C.; Silvac, Valdir Pignatta e
- title: Influence of Brick Walls on the Temperature Distribution in Steel Columns in Fire
- date: 2009-01-01
- words: 2397
- flesch: 63
- summary: This paper presents the results of fire resistance tests in steel columns embedded on walls, carried out at the Laboratory of Testing Materials and Structures of the Uni- versity of Coimbra. Fire resistance tests were carried out with two different column cross-sections, two ori- entations of the inertia axis in relation to the fire and two thicknesses of the building walls [3].
- keywords: case; columns; cross; design; experimental; exposed; fig; fire; furnace; minutes; resistance; section; steel; structures; temperatures; tests; thermal; thermocouple; time; university; walls; web
- versions: original; plain text
- ap-1079
- author: Law, A.; Gillie, M.; Pankaj, P.
- title: Incorporation of Load Induced Thermal Strain in Finite Element Models
- date: 2009-01-01
- words: 2384
- flesch: 56
- summary: 1: Plastic flow, and model setup constituents are irrecoverable [5], i.e. they are plastic strains. This means that plastic strains are induced in directions other than the one in which the load is applied.
- keywords: actual; apparent; behaviour; concrete; constituents; constitutive; curve; different; directions; drucker; element; fig; finite; lits; loading; material; model; modulus; non; plastic; prager; strains; stress; surface; total; university; vol; yield
- versions: original; plain text
- ap-1081
- author: Rahmanian, I.; Wang, Y.
- title: Thermal Conductivity of Gypsum at High Temperatures – A Combined Experimental and Numerical Approach
- date: 2009-01-01
- words: 3001
- flesch: 54
- summary: Thermal properties of gypsum are temperature-depend- ent and among them, thermal conductivity has a critical influ- ence, but there is a wide difference in reported values in litera- ture. Given the effects of porosity, non-homogeneity and moisture in gypsum, direct experimental measurement of thermal conductivity of gypsum at high temperatures is not an easy task.
- keywords: analysis; board; conductivity; density; effective; fig; fire; gyproc; gypsum; heat; high; k t; kiln; material; method; panel; reported; results; specific; temperature; thermal; time; transfer; university; vol; water
- versions: original; plain text
- ap-1083
- author: Crosti, C.
- title: Structural Analysis of Steel Structures under Fire Loading
- date: 2009-01-01
- words: 3392
- flesch: 55
- summary: By means of non linear analyses, it was possible to include considerations of structural fire resistance, and also to figure out how some elements, such as the columns, are fundamen- tal for the stability of the whole structure. We can conclude that, in performance fire analyses, the global behavior of the struc- ture is more important than a study of the individual elements composing the structure.
- keywords: acta; action; analysis; beam; behavior; buckling; collapse; critical; czech; element; fig; finite; fire; house; http://ctn.cvut.cz/ap/; increase; initial; load; material; meters; pcr; plastic; polytechnica; publishing; resistance; scenario; section; shape; steel; structure; technical; temperature; thermal; trend; university; vol; yield
- versions: original; plain text
- ap-1085
- author: Santos, S. O.; Rodrigues, J. P. C.; Toledo, R.; Velasco, R. V.
- title: Compressive behaviour at High Temperatures of Fibre Reinforced Concretes
- date: 2009-01-01
- words: 2740
- flesch: 61
- summary: Five type K thermocouples (Cromo-Alumel) 0.5 mm in di- ameter were placed within the specimen and on its surface to measure the temperature during high temperatures tests. A Portuguese study and a Brazilian study are described, which were carried out to develop fiber concrete compositions with better fire behavior.
- keywords: behavior; c t; compositions; compressive; concrete; diameter; fibers; fibres; glass; high; hpc; hsc; load; loss; maximum; polypropylene; results; room; spalling; specimens; steel; strength; table; temperatures; tests; university; vol
- versions: original; plain text
- ap-1087
- author: Klingsch, E.; Frangi, A.; Fontana, M.
- title: Experimental Analysis of Concrete Strength at High Temperatures and after Cooling
- date: 2009-01-01
- words: 3187
- flesch: 60
- summary: Starting at relative cold strength of 1.0 at 20 °C, the relative hot strength is given by the continuous line, the dots corresponding to the 36 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 49 No. 1/2009 Fig. 4: Concrete specimen after the test Step Measured Category Temperature Level 1 Cold Strength 20 °C 2 Hot strength 300 °C; 500 °C; 700 °C 3 Residual Strength After concrete cooled down to 20 °C from the three hot strength temperature levels from step 2 4 Interim Values 700 °C – 500 °C; 700 °C – 300 °C; 500 °C – 300 °C 5 Slow heating rate (on CEM II-A-LL cement only) 500 °C – hot strength 500 °C – 20 °C (residual strength after cooling down) 6 Magnetic Resonance Imaging (one CEM I specimen only) 300 °C – 20 °C Table 2. It is shown that the SSC concrete specimens perform similar to ordinary cement specimens.
- keywords: aggregates; analysis; cement; cold; concrete; cycle; fig; fire; furnace; heating; higher; hot; level; loss; maximum; phase; rate; residual; results; slag; specimens; ssc; strain; strength; stress; supersulfated; temperature; test; testing; thermal; vol
- versions: original; plain text
- ap-1089
- author: Espinós, A.; Hospitaler, A.; Romero, M. L.
- title: Fire Resistance of Axially Loaded Slender Concrete Filled Steel Tubular Columns – Development of a Three-Dimensional Numerical Model and Comparison with Eurocode 4
- date: 2009-01-01
- words: 2546
- flesch: 57
- summary: The results of the simulations were compared with a series of fire resistance tests available in the literature [11], as well as with the predictions of the Eurocode 4 [6] simplified calculation model. This model was validated by comparing the simulation results with fire resistance tests carried out by other researchers, as well as with the predictions of the Eurocode 4 simplified calculation model.
- keywords: axial; behaviour; cen; cft; columns; comparison; concrete; displacement; ec4; eurocode; fig; fire; frr; model; numerical; resistance; results; simplified; simulation; specimens; standard; steel; structural; table; temperature; test; thermal; values; vol
- versions: original; plain text
- ap-1091
- author: Schneider, U.; Schneider, M.; Franssen, J.-M.
- title: Calculation of a Tunnel Cross Section Subjected to Fire – with a New Advanced Transient Concrete Model for Reinforced Structures
- date: 2009-01-01
- words: 5978
- flesch: 64
- summary: 4 2.2.2 Results of measurements and calculations of total strains with an ATCM and EC2 Model The result of the calculation with the EC2 Model with the recommended value of PSS is signifi- cantly different from the calculations with the ATCM and from the test results.
- keywords: acta; atcm; axial; beam; behaviour; bending; calculated; calculation; comparison; concrete; conditions; czech; data; different; e n; ec2; ec2 model; fig; fire; forces; function; heating; high; higher; history; house; http://ctn.cvut.cz/ap/; load; m e; material; maximum; measured; model; new; node; peak; polytechnica; pss; publishing; relationship; restraint; results; schneider; strain; stress; structures; technical; temperature; thermal; time; total; transient; tunnel; university; value; vol
- versions: original; plain text
- ap-1093
- author: Song, Y.; Huang, Z.; Burgess, I.; Plank, R.
- title: A New Design Method for Industrial Portal Frames in Fire
- date: 2009-01-01
- words: 9476
- flesch: 61
- summary: The non-linear model comprises thermal strain, elastic strain, plastic strain and transient temperature strains, and load history modelling of restraint concrete structures subjected to fire. Further understanding of the behaviour of portal frames in fire is required, to provide other design options so that over-design of column bases and foundations can be avoided, and a more reasonable prediction of real critical temperatures can be made.
- keywords: acta; atcm; axial; base; beam; behaviour; bending; calculated; calculation; capacity; collapse; column; comparison; concrete; concrete model; conditions; critical; czech; data; deformation; design; different; e n; ec2; ec2 model; failure; fig; fire; forces; frame; function; heating; high; higher; hinge; history; house; http://ctn.cvut.cz/ap/; load; lower; m e; material; maximum; measured; mechanism; method; model; moment; new; node; numerical; peak; phase; phase mechanism; plastic; polytechnica; portal; position; pss; publishing; relationship; restraint; results; schneider; second; section; single; stability; steel; strain; strength; stress; structures; technical; temperature; thermal; time; total; transient; tunnel; university; value; vol
- versions: original; plain text
- ap-1095
- author: Mesquita, L. M. R.; Piloto, P. A. G.; Vaz, M. A. P.; Pinto, T. M. G.
- title: Decomposition of Intumescent Coatings: Comparison between a Numerical Method and Experimental Results
- date: 2009-01-01
- words: 3802
- flesch: 61
- summary: At the moving front, the boundary conditions are: k T x q T T h T T T s t t T k r a av p � � � ��� �� � � � � �� ( ) ( ) ( ( ), ) ,4 4 c for v p � � � � T x k T x Q T s t t TH� � � �c for ( ( ), ) , (6) in which QH is the heat flux due to the endothermic decom- position of the virgin material, given by Q h s tH � � p v� �( ), where hp represents the decomposition enthalpy. The virgin material decomposition produces a fraction of gas, equal to the porosity, �, and a solid char fraction equal to ( )1 � � .
- keywords: calorimeter; char; coating; cone; decomposition; different; energy; equal; equation; experimental; fig; fire; flux; gas; heat; higher; intumescence; loss; mass; material; measured; model; plates; protection; rate; results; steel; t t; technical; temperature; tests; thermal; thickness; university; values; variation; virgin; vol
- versions: original; plain text
- ap-1097
- author: Pada, D.
- title: Simulation and Study of Natural Fire in a Wide-Framed Multipurpose Hall with Steel Roof Trusses
- date: 2009-01-01
- words: 2622
- flesch: 63
- summary: Keywords: Natural fire safety concept, case study, multipurpose hall, steel roof truss, design fires, sprinkler system, fire resistance, fire simulation, FDS, steel temperature, structural analysis, FEM. Fig. 4.4 Data measured The most important data measured during the fire simu- lation, from the point of view of structural fire safety design, was the adiabatic surface temperature every 5 m of the bottom chord of the steel roof trusses situated above and near to the fire.
- keywords: adiabatic; chord; design; design fire; exhibition; fig; fire; hall; maximum; model; multipurpose; rhr; roof; safety; simulation; spectator; sprinkler; stand; stand fire; steel; study; surface; system; temperature; total; truss; trusses
- versions: original; plain text
- ap-1099
- author: Anderson, K.; Gillie, M.
- title: Investigation into Methods for Predicting Connection Temperatures
- date: 2009-01-01
- words: 3364
- flesch: 58
- summary: This paper examines two current methods available for predicting connection temperatures as defined in Eurocode 3 [2]. A 3D finite element model is also created to predict connection temperatures using the commercial software package Abaqus
- keywords: average; beam; capacitance; concrete; connection; connection temperatures; cooling; effect; element; emissivity; end; eurocode; experimental; fig; finite; fire; flexible; gas; heat; heating; lower; material; method; mid; modelling; plate; radiative; results; slab; steel; structural; temperatures; tests; time; transfer; university
- versions: original; plain text
- ap-1101
- author: Chlouba, J.; Wald, F.
- title: Connection Temperatures during the Mokrsko Fire Test
- date: 2009-01-01
- words: 2610
- flesch: 65
- summary: Keywords: Fire test, FE simulation, fire safe connection, temperature prediction, Angelina beam, compartment fire. 4.1 Temperatures The prediction of the gas temperatures by the parametric fire curve and by the zone model conservatively expected a temperature of 1057 °C in 60 min of fire, see Fig. 7.
- keywords: acta; beam; behaviour; bolt; castellated; column; compartment; composite; concrete; connection; czech; fig; fire; flange; gas; height; house; http://ctn.cvut.cz/ap/; load; lower; measured; min; polytechnica; prague; publishing; slab; steel; structure; technical; temperature; test; university; upper; vol
- versions: original; plain text
- ap-1103
- author: Kallerová, P.; Wald, F.; Sokol, Z.
- title: Connections of Trapezoidal Sheets under Fire
- date: 2009-01-01
- words: 3354
- flesch: 61
- summary: Steel sheets 10 mm in thickness simulated the bearing roof structure and they were anchored into the grips of the testing machine, see Fig. Two modes of failure were observed for sheet thickness 0.80 mm.
- keywords: action; bearing; behaviour; capacity; catenary; connection; czech; deformation; experiments; failure; fig; fire; force; furnace; higher; load; measured; mechanical; resistance; screws; set; sheet; specimen; steel; structure; temperature; tests; thermal; thickness; thin; trapezoidal; trapezoidal sheet; washer
- versions: original; plain text
- ap-1105
- author: Rajnoha, J.
- title: Multi-Condition Training for Unknown Environment Adaptation in Robust ASR Under Real Conditions
- date: 2009-01-02
- words: 4428
- flesch: 53
- summary: The decrease by 29 % and 14 % in word error rate in comparison with clean speech training data was achieved for the non-adapted and adapted system, respectively. 20 50 100 200 500 1000 all time 65 s 2.8 min 5.7 min 10.9 min 26.9 min 57.2 min 7.8 h Table 3: Average amount of speech data for limited adaptation subsets ALL OFFICE CAR CLEAN NOISY HISNR LOSNR AVG avg avg CS0 CS1 CS0 CS1 CS0 CS1 CS0 CS1 CS0 CS1 CS0 CS1 CS0 CS1 CS0 CS1 noSS 8.32 14.72 3.47 8.14 7.03 35.17 4.0 11.07 13.09 18.79 7.03 10.2 11.88 17.65 12.18 7.83 16.53 SS 8.46 13.53 4.17 8.01 5.2 29.97 4.45 9.82 11.31 16.56 6.83 9.41 11.76 16.31 11.13 7.45 14.8 Imp. �1.68 8.08 �20.17 1.6 26.03 14.79 �11.25 11.29 13.6 11.87 2.84 7.75 1.01 7.59 8.66 4.82 10.48 Table 4: WER for different environmental conditions w/o and with ESS in front-end processing.
- keywords: adaptation; adobe; avg; avg cs0; background; car; clean; condition; condition training; cs0 cs1; czech; data; different; end; environment; false; fig; hisnr; improvement; initial; losnr; matching; material; mllr; models; multi; noise; office; particular; pass; procedure; processing; real; recognition; reduction; results; robust; signal; single; speaker; spectral; speech; subset; subtraction; system; table; task; technical; testing; training; true; university; unknown; vol; wer
- versions: original; plain text
- ap-1107
- author: Hekrdla, M.
- title: A Constellation Space Dimensionality Reduced Sub-Optimal Receiver for Orthogonal STBC CPM Modulation in a MIMO Channel
- date: 2009-01-02
- words: 5481
- flesch: 63
- summary: The term in (22) simplifies P s s P s b s s b� � � � � � � i i N i H i i N j H i i H j i N j Np 2 1 1 11� � �� � � �� �� � . The maximal termination tail length in symbols is obtained considering U U U Vn n n L n� � � �� � � � �1 2 1 1� as N P M Ltt d � � � � � � � � � � � 1 1 1, (13) � denotes modulo P addition and � �* is an integer part rounded up.
- keywords: acta; adobe; basis; block; burst; channel; code; codeword; coding; communications; constellation; continuous; cpm; criterion; czech; data; differences; distance; eigenvalues; equal; error; fading; false; fig; free; house; http://ctn.cvut.cz/ap/; ieee; linear; matrix; mimo; minimal; minimum; modulation; n n; number; optimal; orthogonal; ostbc; paths; performance; phase; polytechnica; projection; publishing; rank; rate; rayleigh; receiver; s s; s t; signal; space; subspace; t n; t t; technical; time; transactions; true; uncoded; university; vn �; vol
- versions: original; plain text
- ap-1109
- author: Gross, S.; Kollenbrandt, M.
- title: Technical Evolution of Medical Endoscopy
- date: 2009-01-02
- words: 4419
- flesch: 52
- summary: 8 Computer-based image processing in medical endoscopy Image processing is a crucial part of the efforts to increase the quality and significance of medical images. A review of the technical evolution of medical endoscopy is given in this paper.
- keywords: /qfactor; /tilewidth; aachen; acta; adobe; band; bladder; body; bozzini; camera; candle; capsule; cavities; clinical; czech; diagnostic; diameter; electric; endoscopy; enhancement; equipment; evolution; examination; example; false; field; fig; flexible; fluorescence; germany; history; house; http://ctn.cvut.cz/ap/; human; illumination; images; imaging; inside; later; light; medical; narrow; patient; pdf; pill; polytechnica; processing; publishing; quality; research; rigid; rwth; section; small; spectral; systems; technical; today; true; tubes; university; video; vol; white
- versions: original; plain text
- ap-1111
- author: Bolom, V.
- title: Noise Reduction in Car Speech
- date: 2009-01-02
- words: 5186
- flesch: 64
- summary: U ei j T j j T� � � 0 for all i j� ) and the desired signal is uncorrelated with the interferences ( [ ( ) ( )]E S e The input signal at the m-th channel can be expressed as x n s n u nm m[ ] [ ] [ ]� � , (1) where s[n] denotes the n-th sample of the desired signal, and um[n] denotes the noise and interference at the m-th sensor.
- keywords: acta; adaptive; adobe; algorithms; array; bap; block; car; coefficients; coherence; criteria; czech; domain; e e; e j; enhancement; false; fig; frequency; gsc; house; http://ctn.cvut.cz/ap/; input; interference; j t; lar; lcb; mcf; methods; microphone; model; msc; multichannel; noise; polytechnica; processing; publishing; real; results; signal; snre; snrin; spatial; speech; system; t �; technical; true; university; vol; weights; y j; � �
- versions: original; plain text
- ap-1113
- author: Flouri, T.
- title: On Tree Pattern Matching by Pushdown Automata
- date: 2009-01-02
- words: 5818
- flesch: 69
- summary: Set � � is defined as � �� � * �{�}. An (extended) non-deterministic pushdown automaton (non- -deterministic PDA) is a seven-tuple M Q G q Z F� ( , , , , , , )� � 0 0 , where Q is a finite set of states, � is an input alphabet, G is a pushdown store alphabet, � is a mapping from Q G� �( { })
- keywords: acm; acta; adobe; alphabet; arity; automata; automaton; case; cfg; context; czech; deterministic; false; fig; finite; form; free; input; languages; lr(0; matching; new; node; non; notation; ordered; pattern; prefix; pushdown; pushdown automaton; pushdown store; ranked; searching; set; snpda; state; store; string; symbol; transition; tree; tree pattern; true; university; valid; vol; � �
- versions: original; plain text
- ap-1115
- author: Meiwes, H.
- title: Technical and Economic Assessment of Storage Technologies for Power-Supply Grids
- date: 2009-01-02
- words: 5777
- flesch: 50
- summary: In this situation the operation of energy storage systems can help to allow a higher amount of renewable energy sources (RES) by stabilizing the grid and finally decreasing the consumption of fossil fuels. Having in mind the huge amount of needed storage ca- pacity, other possibilities for energy storage systems such as compressed air energy storage (CAES) or the possibilities of hydrogen production and storage have to be investigated.
- keywords: acid; acta; adobe; air; applications; available; batteries; battery; bromine; caes; capacity; caverns; class; compressed; conventional; costs; cycle; czech; discharge; economic; efficiency; electricity; energy; energy storage; false; fig; flow; gas; germany; grid; high; hours; house; http://ctn.cvut.cz/ap/; hydrogen; kwh; large; lead; leveling; lifetime; limited; lithium; load; long; necessary; number; operation; plants; plug; polytechnica; possible; potential; power; process; production; publishing; range; redox; regard; renewable; reserve; salt; scale; secondary; storage; storage systems; suited; systems; technical; technologies; technology; term; time; today; true; typical; university; vehicles; vol; wind; years; zinc
- versions: original; plain text
- ap-1117
- author: Janda, J.
- title: Age Dependence of Children’s Speech Parameters
- date: 2009-01-02
- words: 2776
- flesch: 59
- summary: i T i( ) ln ( ) ln ( ) ( )d d C d C d� � � � � � � i i� � 1 , (8) where C i is the covariance matrix, �i is the mean value and ( )d hi is the probability rate of the results on d data, on the as- sumption that hypothesis hi applies. Keywords: children’s speech, age dependence, phonetic analysis.
- keywords: /s/; adobe; age; analysis; central; centre; children; classification; correlation; czech; dependence; deviation; false; fig; frequency; gravity; house; kurtosis; moment; onset; parameters; pdf; phonetic; power; prague; publishing; rate; skewness; spectral; spectrum; speech; standard; time; true; vocal; voice; vol; years
- versions: original; plain text
- ap-1119
- author: Cingroš, F.; Hron, T.
- title: Working Fluid Quantity Effect on Magnetic Field Control of Heat Pipes
- date: 2009-01-02
- words: 2678
- flesch: 51
- summary: Keywords: Heat pipes, magnetic field, variable conductance, oxygen, cryogenic. Fig. 1: Experimental installation The heat pipe was made from a brassy tube (length 470 mm, outside diameter 8 mm, wall thickness 1 mm). Heat pipes are commonly used for cooling and heat transport in electronic devices, techno- logical processes and in many other types of equipment.
- keywords: adobe; characteristics; control; czech; difference; experiments; exposure; false; field; fig; filling; fluid; heat; heat pipe; influence; liquid; lower; magnetic; magnetic field; mpa; operation; oxygen; pdf; pipe; pressure; quantity; republic; static; temperature; transport; true; vol
- versions: original; plain text
- ap-1121
- author: Chvalina, M.
- title: Demand Modelling in Telecommunications
- date: 2009-01-02
- words: 2930
- flesch: 53
- summary: y y y y y t t t t t t t � � � � � � � � � � � �� � � � � � � 1 1 11 1 2 � � � � � � � � � � � � �� � � � � � � � ( ) ( ) [ ( ) � ] ( ) 1 1 1 1 1 2 2 3y y y y y t t t t � t t i t y y y � � �� � � � � � � � � � 1 2 2 0 1 1 1 1 ( ) ( ) ( ) � ( ) � � � � � � � � � �
- keywords: adobe; arima; artificial; average; box; characteristics; czech; demand; exponential; false; fig; form; gprs; intelligence; jenkins; l �; linear; methods; model; modelling; n �; network; neural; prague; process; series; smoothing; statistical; t n; t t; telecommunications; time; true; tt �; university; values; y t; y y; yt t
- versions: original; plain text
- ap-1123
- author: Nevrkla, M.
- title: Capillary Discharge XUV Radiation Source
- date: 2009-01-02
- words: 3439
- flesch: 56
- summary: The apparatus will serve as experimental device for studying of capillary discharge plasma, for test- ing X-ray optics elements and for investigating the interaction of water-window radiation with biological samples. 6: High-frequency equivalent circuit of Rog. coil the capillary end.
- keywords: acta; adobe; apparatus; bank; breakdown; capacitor; capillary; ceramic; circuit; coil; current; czech; discharge; electron; false; fig; frequency; gap; gas; high; http://ctn.cvut.cz/ap/; integration; ionization; laser; length; marx; measured; pdf; pinch; plasma; polytechnica; pre; pressure; probe; radiation; region; rogowski; self; spark; technical; time; transitions; true; tube; uind; university; voltage; xuv
- versions: original; plain text
- ap-1131
- author: Adamec, M.
- title: Transformation of Commercial Flows into Physical Flows of Electricity – Flow Based Method
- date: 2009-01-02
- words: 3591
- flesch: 58
- summary: The baseband representation of the signal is then after the DSP the resulting LINC signals can be written as S t Va t k t t1 1 2 ( ) ( ) exp( ( ) ( ))� �� � , (3) S t Va t k t t2 1 2 ( ) ( ) exp( ( ) ( ))� �� � . The other values are �C � 0 95.
- keywords: acta; adobe; amplifier; approach; class; clier; components; cos; current; diode; eer; efficiency; envelope; false; fig; frequency; function; high; house; http://ctn.cvut.cz/ap/; hybrid; input; linc; measured; network; order; outphasing; output; phase; polytechnica; power; publishing; recycling; reflection; schottky; signal; supply; system; true; university; vol; voltage
- versions: original; plain text
- ap-1133
- author: Wang, F.; Koch, O.
- title: Implementation of a Power Combining Network for a 2.45 GHz Transmitter Combining LINC and EER
- date: 2009-01-02
- words: 3591
- flesch: 58
- summary: The baseband representation of the signal is then after the DSP the resulting LINC signals can be written as S t Va t k t t1 1 2 ( ) ( ) exp( ( ) ( ))� �� � , (3) S t Va t k t t2 1 2 ( ) ( ) exp( ( ) ( ))� �� � . The other values are �C � 0 95.
- keywords: acta; adobe; amplifier; approach; class; clier; components; cos; current; diode; eer; efficiency; envelope; false; fig; frequency; function; high; house; http://ctn.cvut.cz/ap/; hybrid; input; linc; measured; network; order; outphasing; output; phase; polytechnica; power; publishing; recycling; reflection; schottky; signal; supply; system; true; university; vol; voltage
- versions: original; plain text
- ap-1137
- author: Dirix, M.; Koch, O.
- title: 2.45 GHz Class E Power Amplifier for a Transmitter Combining LINC and EER
- date: 2009-01-02
- words: 3222
- flesch: 56
- summary: I ts DC R R( ) sin ( ) sin ( ) sin ( )� � � � � �� � � � � � . 2 Theory For lossless operation of the Class E amplifier there are two criteria that have to be met: First, zero voltage across the transistor terminals when the switch closes [4] u t ts c( )� �� � 0.
- keywords: adobe; amplifier; capacitor; circuit; class; clier; current; czech; design; eer; efficiency; false; fig; frequency; ghz; high; impedance; implementation; input; koch; linc; line; load; network; non; operation; output; pdf; phase; polytechnica; power; real; response; results; signal; simulated; simulation; sin; supply; switch; technical; terminals; transistor; transmission; transmitter; true; university; voltage
- versions: original; plain text
- ap-1139
- author: Brož, J.; Rieger, F.
- title: Mixing Suspensions in Tall Vessels with a Draught Tube
- date: 2010-01-01
- words: 1033
- flesch: 67
- summary: The power number at the speed necessary to initiate particle suspension Pop does not differ significantly from the power number at the speed necessary to keep a particle in suspension Pok, and its mean value is Po � �163 0 07. . . 2 Modifications to a draught tube for particle suspension
- keywords: agitator; czech; draught; fig; mixing; number; particle; power; speed; suspension; tube
- versions: original; plain text
- ap-1141
- author: Kučera, O.
- title: Self Heating of an Atomic Force Microscope
- date: 2010-01-01
- words: 1804
- flesch: 66
- summary: This feature of ICN measurements, and of AFM measurements generally, is not widely known and it may lead to incorrect determination of noise characteristics such RMS value of the noise, etc. 4 Conclusion A major problem of AFM measurements (especially on an atomic scale) is the influence of any kind of noise.
- keywords: afm; air; atomic; cantilever; contact; czech; deflection; fig; force; heating; intrinsic; laser; measurements; microscope; min; noise; pspd; resolution; sample; self; signal; temperature; time; tip; vertical; voltage
- versions: original; plain text
- ap-1143
- author: Ficker, T.
- title: A Note on the Population Statistics of Electron Avalanches and Streamers
- date: 2010-01-01
- words: 733
- flesch: 58
- summary: Keywords: Population statistics, electron avalanches, fractal statistical pattern, ultraviolet data. Fig. The pattern, i.e. the probability density function, has the fol- lowing form F n n K N N n n x j j n j J ( ) ( ) , exp ( ) � � � � � � � � � � � � � � � � 1 1 1 0 � dx D K N x 0 � � � � � � � � , ln ( )
- keywords: avalanches; data; electron; fig; fractal; pattern; pulses; tests; ultraviolet
- versions: original; plain text
- ap-1145
- author: Hájek, J.
- title: Adaptation of an Evolutionary Algorithm in Modeling Electric Circuits
- date: 2010-01-01
- words: 2958
- flesch: 67
- summary: The following transformations were used for scaling and re-scaling: R R Ri i N norm � , (7) C C f RN N1 12norm � � , (8) L L f R N N 1 12norm � � . Values F � 0.8 and Cr � 0.5 do not always guarantee good convergence.
- keywords: adaptation; algorithm; auto; best; circuits; convergence; evolutionary; factor; fig; function; influence; insertion; loss; min; model; population; rand; results; solution; strategy; technical; test; tested; values; variables; variants; vector
- versions: original; plain text
- ap-1147
- author: Vyroubal, J.
- title: Using the Spindle Cooling Temperature as a Tool for Compensating the Thermal Deformation of Machines
- date: 2010-01-01
- words: 2296
- flesch: 64
- summary: This delay can cancel the thermal compensation of machine deformation. In terms of heat generation, the spindle is the major source of heat, and its thermal deformation is a ma- jor cause of overall machine deformation.
- keywords: analysis; axis; behavior; calculation; compensation; czech; deformation; fig; frame; heat; liquid; machine; measurement; min; multinomial; phase; place; reaction; sensors; spindle; technical; temperature; thermal; time; tool; type; university; vol
- versions: original; plain text
- ap-1149
- author: Večeř, P.; Kreidl, M.; Šmíd, R.
- title: Gearbox Condition Monitoring Using Advanced Classifiers
- date: 2010-01-01
- words: 4516
- flesch: 65
- summary: A B C D RMS1 (m/s2) 4.74 5.80 1.32 2.43 RMS2 (m/s2) 2.77 8.74 2.35 3.13 Skew1 (-) 0.35 0.31 �0.09 �0.17 Skew2 (-) 0.39 0.43 0.24 �0.63 Kur1 (-) 3.02 2.80 2.95 2.74 Kur2 (-) 2.16 2.19 2.56 2.99 Table 2: Typical values of input vectors for the 1st gear Fig. 4: Sammon’s visualization of the learned map after the sec- ond phase C A D B 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 Fig. 5: Distance between reference vectors neighboring neurons and the input vector for first-gear test mapping (lighter gray – shorter distance, darker gray – longer distance) distance between the reference vector neighboring units and input vector mapping is visualized in Fig. tj i ij i N � � � � � ( ) ( ) 2 0 1 , (1) where xi is the i-th element of input vector x in time t, wij is the i-th value of the weight vector for the j-th output neuron in time t.
- keywords: acta; adaptive; anfis; classification; classifier; condition; czech; data; decision; diagnostics; distance; features; fig; fuzzy; gearbox; gearboxes; house; http://ctn.cvut.cz/ap/; index; input; kohonen; layer; learning; map; mapping; network; neural; neuron; organizing; polytechnica; process; processing; publishing; quality; results; rms; rules; second; signal; som; surface; system; table; technical; test; tested; training; type; university; value; vector; vibration; vol
- versions: original; plain text
- ap-1151
- author: Mocková, D.
- title: Allocation and Location of Transport Logistics Centres
- date: 2010-01-01
- words: 3612
- flesch: 51
- summary: 1.3 Multiple criteria decision making Multiple criteria decision making involves modeling deci- sion-making situations containing a defined set of options and a set of criteria according to which the options will be evaluated. We have therefore merely outlined the theoretical side of using multiple criteria decision making and the solution methodology.
- keywords: algorithm; best; bit; costs; criteria; criterion; crossover; decision; decision making; depots; evaluation; evaluation criteria; field; fig; fitness; generation; importance; individual; location; logistics; making; methods; multiple; mutation; node; number; objectives; optimal; options; problem; quality; set; solution; subset; tasks; technical; transport; value
- versions: original; plain text
- ap-1153
- author: Pfof, Z.; Vaculík, P.
- title: Ultracapacitors Utilization for Automotive Applications
- date: 2010-01-01
- words: 2275
- flesch: 62
- summary: The ultracapacitor also has other advantages – it is capable of very fast charges and dis- charges, a millions of cycles without degradation, extremely low internal resistance or ESR, high output power, etc. Power losses of hard-switching vs. soft-switching Hard-switching is very widely used for power inverters, whereas soft-switching is used only in high frequency applications.
- keywords: boost; converter; current; drive; fig; fuel; hard; high; loss; mode; output; power; resonant; semiconductor; simulation; soft; switching; technical; transistor; turn; ultracapacitors; unit; university; value; voltage; zvs
- versions: original; plain text
- ap-1155
- author: Ficker, T.
- title: Statistical Distributions of Electron Avalanches and Streamers
- date: 2010-01-01
- words: 4446
- flesch: 60
- summary: Since the voltage pulses u were not calibrated against the number of electrons n, the resultant distribution curves w1 are dependent on u instead of n. Assuming linear proportionality u c n� � , the curve w u c u D1 0 1( ) ( )� � � � will preserve the same shape as w n1( ), i.e. they will both possess the same slope � �( )1 D . The populations of displaced ava- lanches of the j-th generation that reach the anode can easily be expressed: � �n d jd j, exp ( )� �� � .
- keywords: avalanches; case; czech; data; dimension; discharge; distribution; exp; ficker; fig; fitting; fractal; function; furry; gap; house; http://ctn.cvut.cz/ap/; linear; multiplication; n n; new; number; parameter; parent; pareto; pattern; photoionization; phys; polytechnica; populated; population; publishing; section; statistics; streamer; technical; university; value; vol; � �
- versions: original; plain text
- ap-1157
- author: Vaněček, D.; Klement, V.
- title: Electronic Education at the Faculty of Nuclear Sciences and Physical Engineering
- date: 2010-01-01
- words: 3070
- flesch: 58
- summary: First attempts to introduce e-learning appeared around the year 1999, and since then the number of projects dealing with this topic is increasing. This paper deals with the current issue of electronic education, and is based on a study of Internet support for education at the Faculty of Nu- clear Sciences and Physical Engineering at the Czech Technical University in Prague.
- keywords: chart; content; course; creation; czech; development; education; electronic; engineering; faculty; fig; form; internet; learning; lms; management; materials; nuclear; number; physical; results; sciences; students; study; subject; support; systems; teachers; technical; technologies; time; university; use; web
- versions: original; plain text
- ap-1159
- author: Amann, W.
- title: New Policies to Facilitate Affordable Housing in Central and Eastern Europe
- date: 2010-01-01
- words: 3733
- flesch: 52
- summary: Keywords: affordable housing, housing law, housing construction, CEE countries, Romania. and landlords, a Condominium Law, a Housing Manage- ment and Maintenance Law that covers all regulations in the field of housing operation, administration, accounting, main- tenance and refurbishment, and a Housing Subsidy Law that defines the legal basis for all activities of the state in (co-)financing housing construction, refurbishment, housing benefits and related activities. 3 Structured financing for PPP housing PPP housing legislation has been described as a strategy leading toward the establishment of a new business sector, targeting at affordable housing, particularly rental housing (UNECE 2005a, Lux 2006, Chiquier/Lea 2009).
- keywords: 2005; affordable; amann; approach; austria; basis; capital; cee; cent; condominiums; construction; costs; countries; development; dwellings; equity; european; finance; financing; framework; groups; h!fact; households; housing; iibw; income; interest; international; kemeny; law; legal; legislation; limited; loans; low; lpha; maintenance; major; market; model; mundt; new; policy; ppp; prices; private; public; refurbishment; regulations; rental; rental housing; rents; romanian; sector; social; state; subsidies; transition
- versions: original; plain text
- ap-1161
- author: Frank, H.
- title: Differences Between Doped and Undoped Zirconium Alloy Oxide Layers
- date: 2010-01-02
- words: 1810
- flesch: 58
- summary: 6: Temperature dependence of resistivity using data of I-Vcharacteristics, (each samplemeasured twice toprove re- producibility), activation energy of resistivity equal in both samples Fig. 7: Equal temperature dependence of mobility in both samples Fig. 8: Equal temperature dependence of carrier concentra- tion in both samples energy. Keywords: Zirconium alloy oxide layers, doped and undoped samples, I-V characteristics, temperature dependence of transport parameters, activation energy, injection and extraction currents and their time dependence, reduction semicon- ductor.
- keywords: acta; activation; characteristics; current; dependence; doping; equal; extraction; fig; figs; higher; injection; measured; mobility; oxide; resistivity; samples; temperature; undoped; voltage
- versions: original; plain text
- ap-1163
- author: Granja, C.; Linhart, V.; Platkevič, M.; Jakůbek, J.; Krouský, E.; Pospíšil, S.; Renner, O.; Slavíček, T.
- title: Active Detectors for Plasma Soft X-Ray Detection at PALS
- date: 2010-01-02
- words: 4344
- flesch: 57
- summary: Two types of detector systems have been adapted for this purpose: hybrid semiconductor pixel detectors, and fast scintillating detectors. Fig. 4: BaF2 detector with lead (Pb), Aluminum (Al) and Polyethylene (PE) shield Fig. 5: Shield assembly for BaF2 detector with lead (Pb), Aluminum (Al) and Polyethylene (PE) segments.
- keywords: acta; active; assembly; baf2; board; chamber; czech; data; detection; detector; direct; emi; energy; excitation; experimental; figure; granja; high; institute; interaction; interface; jakůbek; kev; laser; low; mail; medipix; noise; nuclear; operation; pals; phone; physics; pixel; plasma; polytechnica; pospíšil; power; prague; radiation; readout; republic; setup; shield; shielding; shot; single; system; target; time; usb; view; vol
- versions: original; plain text
- ap-1165
- author: Šulc, R.; Svačina, O.
- title: Flock Growth Kinetics for Flocculation in an Agitated Tank
- date: 2010-01-02
- words: 3875
- flesch: 58
- summary: For flocculation taking place in an agitated tank, Šulc and Ditl [2] recommend dimension- less flocculation time t∗F given by: t∗F = n · tF (3) where tF is flocculation time, and n is impeller rota- tional speed. Using the statistical hypothesis test, the fractal dimension was found to be independent of flocculation time, and the value Df2 =1.442 ±0.125 was determined as the average value for the given conditions.
- keywords: agitated; analysis; area; camera; correlation; data; df2; dfmax; dimension; dimensionless; experimental; fig; flocculant; flocculation; flock; fractal; generalized; growth; hypothesis; image; impeller; kaolin; kinetics; log; maximum; min; mixing; model; ntf; parameters; residual; size; table; tank; time; turbidity; value; vessel; vol; wastewater
- versions: original; plain text
- ap-1167
- author: Zahradnický, T.; Lórencz, R.
- title: FPU-Supported Running Error Analysis
- date: 2010-01-02
- words: 4417
- flesch: 64
- summary: 50 No. 2/2010 FPU-Supported Running Error Analysis T. Zahradnický, R. Lórencz Abstract A-posteriori forward rounding error analyses tend to give sharper error estimates than a-priori ones, as they use actual data quantities. One of such a-posteriori analysis – running error analysis – uses expressions consisting of twoparts; one generates the error and the other propagates input errors to the output.
- keywords: absolute; acta; analysis; approach; bound; calculated; case; class; computer; const; czech; data; department; double; error; error analysis; estimate; evaluation; extended; fldl; forward; fpu; instruction; line; load; point; polytechnica; posteriori; prague; precision; priori; result; rounded; rounding; running; sum; times; traditional; type; university; u|ŝ|; value; vol
- versions: original; plain text
- ap-1169
- author: Cisek, J.
- title: Injection and Combustion of RME with Water Emulsions in a Diesel Engine
- date: 2010-01-02
- words: 4590
- flesch: 53
- summary: 50 No. 2/2010 Injection and Combustion of RME with Water Emulsions in a Diesel Engine J. Cisek Abstract This paper presents ways of using the fully-digitised triggerable AVL VideoScope 513D video system for analysing the injection and combustion inside a diesel engine cylinder fuelled by RME with water emulsions. The research objects were: standard diesel fuel, rapeseed methyl ester (RME) and RME – water emulsions.
- keywords: acta; angle; bar; chamber; combustion; cylinder; diesel; diesel fuel; different; emissions; emulsion; engine; ester; exhaust; fig; flame; flow; fuel; fuel injection; fuel jet; gas; ignition; images; injection; jet; maximum; measurements; methyl; nox; polytechnica; pressure; process; rapeseed; rate; reduction; repeated; rme; rotation; rotation angle; rpm; shaft; shaft rotation; smoke; standard; standard diesel; temperature; vol; water; water emulsion; water fig
- versions: original; plain text
- ap-1171
- author: Dostál, M.; Petera, K.; Rieger, F.
- title: Measurement of Heat Transfer Coefficients in an Agitated Vessel with Tube Baffles
- date: 2010-01-02
- words: 6104
- flesch: 62
- summary: Dimensionless parameters are usually used to de- scribe the relation between heat transfer coefficients and other parameters, e.g. mixing intensity. [5] also measured heat transfer coefficients in a vessel with tube baffles.
- keywords: acta; agitated; agitated liquid; area; baffles; blade; case; coefficient; confidence; constant; cooling; correlation; czech; data; diameter; difference; figure; fit; flow; heat; heat transfer; heating; impeller; inlet; interval; k−1; liquid; mean; measured; media; method; model; number; nusselt; outlet; overall; parameters; polytechnica; power; probability; rate; region; results; rotation; specific; squares; sum; temperature; time; transfer; transfer coefficient; transient; tube; value; vessel; viscosity; vol; water
- versions: original; plain text
- ap-1173
- author: Koller, J.
- title: Treatment of Biogas for Use as Energy
- date: 2010-01-02
- words: 2669
- flesch: 51
- summary: 50 No. 2/2010 Treatment of Biogas for Use as Energy J. Koller Abstract The biogas generated in biogas plants offers significant potential for the production of energy from renewable energy sources. Biogas plants usually use co-generation units to generate electricity and heat.
- keywords: acta; anaerobic; animal; biogas; biogas plants; biomethane; co2; compounds; content; czech; degradable; efficiency; electricity; energy; fermentation; fermentor; generation; heat; heating; high; hydrogen; materials; means; operation; optimum; organic; plant; polytechnica; production; renewable; republic; separation; significant; substances; substrates; sulphide; unit; utilization; vol; wastes; water
- versions: original; plain text
- ap-1175
- author: Sajbrt, V.; Rosol, M.; Ditl, P.
- title: A Comparison of Distillery Stillage Disposal Methods
- date: 2010-01-02
- words: 4268
- flesch: 60
- summary: Keywords: disposal of distillery stillage, economic comparison, energy requirements. % Table 4: All operating costs of transportation to a biogas plant Total neutralization costs: 170 EUR/day 7.0 % Total cost – electric energy for centrifuge: 60 EUR/day 2.5 % Total transport costs of stillages: 1 810 EUR/day 74.5% Total transport costs of digestate to the fields: 390 EUR/day 16.0 % Total price of generated electric energy from biogas: −1 020
- keywords: acta; biogas; centrifuge; chemical; combustion; concentration; condensate; content; costs; day; disposal; distillery; dry; dryer; drying; electric; energy; ethanol; eur; evaporation; feeding; fermentation; fig; high; line; livestock; main; mash; mass; method; operating; operating costs; organic; plant; polytechnica; pretreatment; process; production; stillage; suitable; total; total operating; transport; treatment; vol; waste
- versions: original; plain text
- ap-1177
- author: Zueva, G. A.; Padokhin, V. A.; Ditl, P.
- title: Stochastic Models of Solid Particles Grinding
- date: 2010-01-02
- words: 3438
- flesch: 58
- summary: Mathematical models of disintegration kinetics are classified on the basis of the class of Markov process that they belong to. 1 Introduction Alongside the traditional approach, based on phe- nomenological introduction of the mechanics of a con- tinuous medium into a description of chemical en- gineering processes, in particular, milling processes, stochastic approaches, particularly those based on Markov processes, have become widely applied.
- keywords: calculated; chemical; conditions; continuous; density; device; differential; discrete; distribution; equation; experimental; grinder; grinding; initial; kinetics; markov; material; mathematical; matrix; milling; models; moment; particle; probabilities; probability; process; processes; shock; size; states; stochastic; system; technology; theoretical; theory; time; transition; vector; vol; π(0; π(t
- versions: original; plain text
- ap-1179
- author: Azcárraga, J. A. de; Izquierdo, J. M.
- title: Topics on n-ary Algebraic Structures
- date: 2010-01-03
- words: 4238
- flesch: 84
- summary: 50 No. 3/2010 [3] de Azcárraga, J. A., Pérez-Bueno, J. C.: Higher- order simple Lie algebras,Commun. For semisimple Lie algebras, Whitehead’s lemma states that H20(g)= 0, H 2 ad(g, g)= 0.
- keywords: a=1; adx; algebras; ary; azcárraga; bracket; central; cohomology; deformations; extensions; fa1; fas; filippov; fn−1; fundamental; generalized; identity; leibniz; lemma; lie; math; nambu; p+1∑; phys; poisson; semisimple; simple; structures; trivial; vol; xn−1; xp+1; x̂j; α1(x
- versions: original; plain text
- ap-1181
- author: Bandos, I. A.
- title: On multiple M2-brane model(s) and its N=8 Superspace Formulation(s)
- date: 2010-01-03
- words: 6229
- flesch: 70
- summary: Here we speak in terms of the case with M �= N, which is terminologically simpler, but all our arguments clearly also apply for M = N. The Grassmann spinorial covariant derivatives DIα in (51) includes the gaugegroup SU(M)×SU(N) con- nection and obey the algebra {DIα, D J β} = iγ a αβ δIJDa .8), and a Spin(8) 8s- plet of Majorana anticommuting Sl(2;R) spinor fields ψA (A = 1, . . .
- keywords: abjm; acta; action; algebra; bagger; bandos; blg; brackets; branes; chern; complex; covariant; d3y; dimensional; dαȧ; equation; fields; filippov; formalism; formulation; gauge; hep; identities; invariant; jhep; lagrangian; lambert; lcs; lie; like; matrix; mij; model; motion; multiple; phys; plet; polytechnica; potential; pre; pure; respect; scalar; sdiff3; shell; simons; spinor; strength; superfield; superspace; symmetry; system; terms; theories; theory; use; vector; vol; wȧḃ
- versions: original; plain text
- ap-1183
- author: Fedoruk, S.
- title: Superconformal Calogero Models as a Gauged Matrix Mechanics
- date: 2010-01-03
- words: 4323
- flesch: 77
- summary: (2.19) 3 N =2 superconformal Calogero model N = 2 supersymmetric generalization of the sys- tem (2.1) is described by • the even hermitian (n × n)-matrix superfield Xba(t, θ, θ̄), (X) + = X , a, b =1, . . . i(xa − xb)p b a − i(pa − pb)x b a + (2.12)
- keywords: + +; acta; action; bosonic; brackets; calogero; case; constraints; d(2,1;α; dirac; d̄x; e2v; fields; following; gauge; hermitian; invariant; ivanov; jhep; lechtenfeld; lett; matrix; mechanics; model; multiplets; nucl; phys; physical; polytechnica; quantum; rev; superconformal; superfield; supermultiplets; system; term; transformations; u(n; vol
- versions: original; plain text
- ap-1185
- author: Gazeau, J. P.; Baldiotti, M. C.; Gitman, D. M.
- title: Coherent State Quantization and Moment Problem
- date: 2010-01-03
- words: 3929
- flesch: 72
- summary: The average of the random variable n �→ xn is 〈xn〉 = t. Contrariwise to the standard case X = N, the continuous (gammalike) distribution t �→ 1 E(t) tn xn! with parameter n is not a probabilitydistributionwith respect to the Lebesgue measure dt:∫ (ii) The map C � z �→ |vz〉 is continuous (continu- ity).
- keywords: acta; classical; coherent; complex; corresponding; d2z; def; distribution; f(z; field; gazeau; j.-p; measure; moment; momentum; motion; operator; parameter; particle; phase; phys; plane; polytechnica; probability; problem; quantization; resolution; sequence; space; standard; states; unity; vol; xn+1; |en; |z0; |z|2
- versions: original; plain text
- ap-1187
- author: Kerner, R.
- title: Lorentz and SU(3) Groups Derived from Cubic Quark Algebra
- date: 2010-01-03
- words: 3833
- flesch: 63
- summary: The quarks transform with matrices U (or Ū for the anti-quarks), but these matrices are not unitary: their determinants are equal to j2 or j, respectively. (16) Matrix Ū is the complex conjugate of matrix U, and det(Ū) is equal to j.
- keywords: algebra; anti; ḃa; case; choice; combinations; complex; components; conjugate; covariance; cubic; equal; expressions; following; form; fundamental; generators; grade; group; independent; indices; like; linear; lorentz; matrices; matrix; matter; non; products; properties; quarks; relations; representation; similar; space; su(3; ternary; time; values; θaθb
- versions: original; plain text
- ap-1189
- author: Mickelsson, J.
- title: From Gauge Anomalies to Gerbes and Gerbal Representations: Group Cocycles in Quantum Theory
- date: 2010-01-03
- words: 4223
- flesch: 71
- summary: Then we investigate how group cohomology of degree 3 comes from a prolongation problem for group extensions and we discuss its role in quantumfield theory. In the case of Lie groups, there is a corresponding Lie algebra cocycle representing a class in H3(g, a), where a is the Lie algebra of a.
- keywords: abelian; acta; action; acts; algebra; bundle; c(x; case; central; class; cocycle; cohomology; compact; complex; condition; corresponding; degree; element; example; extension; field; fock; form; function; gauge; group; hilbert; in(b; left; lie; lie algebra; loop; math; operator; phys; point; polytechnica; projective; quantization; quantum; representation; space; theory; vector; vol
- versions: original; plain text
- ap-1191
- author: Sorokin, D.
- title: Higher-Spin Triplet Fields and String Theory
- date: 2010-01-03
- words: 4203
- flesch: 68
- summary: In particular, I would like to discuss a sys- tem of higher spin fields which are called triplets. Quartet unconstrained formulation for massless higher spin fields, Nucl.
- keywords: acta; action; as−; bosonic; brst; case; condition; connection; consistent; dxm; equations; fermionic; fields; formulation; frame; free; gauge; geometrical; gravity; hep; higher; higher spin; indices; interactions; like; limit; local; massless; nucl; particles; phys; physical; polytechnica; problem; reducible; space; spin; spin fields; states; string; symmetric; symmetry; tensionless; theory; torsion; transformations; triplet; vasiliev; vielbein; vol
- versions: original; plain text
- ap-1193
- author: Todorov, I.
- title: Gause Symmetry and Howe Duality in 4D Conformal Field Theory Models
- date: 2010-01-03
- words: 5599
- flesch: 67
- summary: 50 No. 3/2010 [35] Nikolov, N. M., Rehren, K.-H., Todorov, I. T.: Partial wave expansion and Wightman positiv- ity in conformal field theory, Nucl. For D = 4, infinite dimensional Lie algebras are generated by bifields Vij(x1, x2) which naturally arise in the OPE of a (finite) set of (say, her- mitean, scalar) localfields φi ofdimension d(> 1): (x212) d φi(x1)φj(x2)= Nij + x 2 12 Vij(x1, x2)+ O((x 2 12) 2) , x12
- keywords: acta; algebras; bifields; bilocal; central; cft; chiral; commun; commutator; compact; conformal; correlation; corresponding; dimensional; dual; energy; fact; fields; fock; free; functions; gauge; group; harmonic; hep; higher; howe; infinite; invariant; irreducible; kac; l(f; left; lie; local; massless; math; nikolov; number; pair; phys; physics; point; polytechnica; positive; product; quantum; real; reductive; rehren; remark; representations; scalar; sect; set; space; superselection; tensor; theory; time; todorov; u(n; unitary; variables; vertex; vol; weight; ρ13; ρ24
- versions: original; plain text
- ap-1195
- author: Znojil, M.
- title: Time-Dependent and/or Nonlocal Representations of Hilbert Spaces in Quantum Theory
- date: 2010-01-03
- words: 4395
- flesch: 56
- summary: Vice versa, once the Hamilto- nian H proves solvable in Hilbert space H(T), we may rely upon the availability of the closed solutions of the underlying Schrödinger equations and on the related specific spectral representations of the necessary oper- ators (cf. The rectification transition between Hilbert spaces H(T) and H(F) is tractable as an equivalence transformation under this assumption [10].
- keywords: acta; arxiv; certain; complex; context; coordinates; cryptohermitian; dependent; dyson; equations; equivalence; evolution; form; friendly; functions; h(f; h(p; h(s; h(t; hamiltonian; hilbert; hilbert space; lett; math; mechanics; metric; models; new; non; nontrivial; notation; nuclear; observables; operators; paper; phys; physical; physics; polytechnica; potentials; quantum; representations; review; role; scattering; space; standard; state; symmetric; theory; time; tobogganic; unitary; use; vector; vol; wave; znojil
- versions: original; plain text
- ap-1197
- author: Bičák, J.
- title: Gravitomagnetism (extended abstract)
- date: 2010-01-03
- words: 926
- flesch: 46
- summary: One has to realize that the physical effects associatedwith Mach’s ideas, e.g. the “dragging of inertial frames” (“gravitomag- netic effects”) have a global character and require spe- cial coordinate systems, special gauges. In more recent papers [5, 6], we show that within General Relativity, any general statement of Mach’s principle that attributes all dragging of inertial frames solely to the distribution of energy and momentum of matter as the originof inertia is false: Gravitomagnetic effects are also caused by gravitational waves.
- keywords: bičák; distribution; effects; energy; frame; gauges; general; gravitational; gravitomagnetic; gravity; inertial; katz; mach; momentum; pages; principle; universe; waves
- versions: original; plain text
- ap-1199
- author: Caprini, I.; Fischer, J.; Vrkoč, I.
- title: Asymptotic Power Series of Field Correlators
- date: 2010-01-03
- words: 2992
- flesch: 72
- summary: [6] Caprini, I., Fischer, J., Vrkoč, I.: J. Phys. 50 No. 3/2010 Asymptotic Power Series of Field Correlators I. Caprini, J. Fischer, I. Vrkoč Abstract We address the problem of ambiguity of a function determined by an asymptotic perturbation expansion.
- keywords: a(s; analyticity; asymptotic; b(u; borel; caprini; contour; convergence; czech; disc; expansion; f(z; fischer; form; function; g(r; lemma; perturbation; phys; physics; plane; qcd; rev; series; singularities; special; vol; watson
- versions: original; plain text
- ap-1201
- author: Doebner, H.-D.
- title: On Global and Nonlinear Symmetries in Quantum Mechanics
- date: 2010-01-03
- words: 4060
- flesch: 58
- summary: A discussion of these relations is the topic of my paper: The global structure of the set {Q(M, K)} of quantizations of the kinematics in aHilbert space H is connected with a nonlinear representation of a matrix group G which leads also to a quantization of other observables through nonlinear operators. With (21) one obtains an already mentioned non- linear realization of G(3) with linear generators of the Galilei-algebrawith the exception of the freeHamilto- nian which appears as nonlinear operator.
- keywords: -d(m; algebra; b(m; borel; case; classical; complex; c∞(m; differential; doebner; domain; e.g.; ect0(m; esa; global; group; h.-d; hermitean; k(m; l2(m; lie; maps; math; model; n[ψ; nonlinear; observables; operators; order; phys; physical; position; properties; q(m; quantization; quantum; representation; set; smooth; structure; symmetry; system; tangent; vol
- versions: original; plain text
- ap-1203
- author: Engelen, J.
- title: Physics on the Terascale (extended abstract)
- date: 2010-01-03
- words: 951
- flesch: 50
- summary: In addition, the huge amounts of data of 15 PetaBytes per year required a new approach to com- puting: the now operational worldwide LHC comput- ing GRID (wLCG), also serving as a platform for ap- plications outside high energy physics. The LHC is a marvel of technology in all its facets, crowned by the super- conducting dipole magnets.
- keywords: additional; boson; collider; energy; field; helium; higgs; ingredient; large; lhc; magnets; marvel; mechanism; new; order; september; system; technology; terascale; tev
- versions: original; plain text
- ap-1205
- author: Furlan, P.; Petkova, V. B.; Stanishkov, M.
- title: A Finite Liouville Dress for c
- date: 2010-01-03
- words: 3053
- flesch: 67
- summary: β1 − σ1 − σ2 + b 2 ) Indeed they satisfy the charge conservation conditions (Q − β3)+β2+β1 = Q and β3+(Q − β2 − b/2)+(β1 − b/2)= Q, respectively, and their residua equal 1/2π (to agree with the normalisation in [9]).
- keywords: acta; boundary; case; charges; correlator; corresponding; cyclic; degenerate; dual; equation; expression; factor; field; formula; g(−)(σ2; general; hep; liouville; matter; non; pentagon; phys; point; polynomials; polytechnica; reflection; representations; string; tachyon; values; vol; σ3,σ2,σ1
- versions: original; plain text
- ap-1207
- author: Ivanov, E.
- title: M2-Branes in N = 3 Harmonic Superspace
- date: 2010-01-03
- words: 3396
- flesch: 67
- summary: • Constructing the full effective actions of M2- branes in terms of the N = 3 superfields (with a Nambu-Goto action for scalar fields in the case of oneM2-braneand its nonabeliangeneralization for N branes). [19] Buchbinder, I. L., Ivanov, E. A., Lechtenfeld, O., Pletnev, N. G., Samsonov, I. B., Zupnik, B. M.: Quantum N = 3, d = 3 Chern-Simons Matter Theories in Harmonic Superspace, JHEP 0910 (2009) 075, arXiv:0909.2970
- keywords: + +; 3,3d; abjm; action; ads; algebra; blg; branes; case; cft; chern; correspondence; energy; fields; formulation; gauge; group; harmonic; hep; hidden; jhep; limit; low; matter; phys; scalar; shell; simons; superconformal; superfield; superspace; supersymmetry; theories; theory; u(n
- versions: original; plain text
- ap-1209
- author: Jenni, P.
- title: The ATLAS Experiment Entering into Operation: Overview, Motivation and Status of the Project (extended abstract)
- date: 2010-01-03
- words: 420
- flesch: 51
- summary: 50 No. 3/2010 The ATLAS Experiment Entering into Operation: Overview, Motivation and Status of the Project P. Jenni The Large Hadron Collider LHC at the European Laboratory for Particle Physics CERN near Geneva will deliverparticle collisionsat thehighest energyever achieved in a laboratory. ATLAS will address questions like: Why do particles have a mass, What is the non-visible dark matter in the Universe, Are there more than four dimensions in Nature, and What are the smallest building blocks of matter?
- keywords: atlas; cern; collaboration; construction; jenni; laboratory; large; niederle; operation; overview
- versions: original; plain text
- ap-1211
- author: Niederle, J.; Nikitin, A. G.; Kuriksha, O.
- title: Maxwell-Chern-Simons Models: Their Symmetries, Exact Solutions and Non-relativistic Limits
- date: 2010-01-03
- words: 4098
- flesch: 71
- summary: In contrast to the CFJ model, ourmodels are rela- tivistically invariant and include this model as a par- ticular sector corresponding to constant solutions for vector field F μ. The MCS model in the (1+3)-dimensional Minkovski space Let us start with the following Lagrangian L=− 1 4 Fμν F μν − 1 2 FμF μ − κ 4 εμνρσ F μAν F ρσ + ejμA μ + qj4A 4. (3) Here the Greek indices run over the values 0,1,2,3, Aν and F μν = ∂μAν − ∂ν
- keywords: acta; additional; axion; cfj; constant; contraction; corresponding; electrodynamics; equations; exact; field; following; form; fμν; galilean; galilei; gauge; generators; group; invariant; lagrangian; lie; limit; lorentz; maxwell; model; nikitin; non; phys; poincaré; polytechnica; possible; potential; related; relativistic; representation; solutions; space; symmetries; symmetry; system; tensor; variables; vector; vol; w.r.t
- versions: original; plain text
- ap-1213
- author: Schnabl, M.
- title: Algebraic Solutions in Open String Field Theory – a Lightning Review
- date: 2010-01-03
- words: 4972
- flesch: 68
- summary: Let us describe string field theory states as linear combina- tions of surfaces with vertex operator insertions, such as inFig. 50 No. 3/2010 Algebraic Solutions in Open String Field Theory – a Lightning Review M. Schnabl Abstract In this short paper we review basic ideas of string field theory with the emphasis on the recent developments.
- keywords: acta; action; analytic; arxiv; background; cft; classical; closed; distributions; energy; erler; f(k; f(z; field; field theory; functions; gauge; general; geometric; ghost; hep; infinite; inverse; laplace; non; open; operator; o′c; perturbative; physics; polytechnica; product; rez; safe; sen; solution; space; star; states; string; string field; surface; tachyon; theories; theory; transform; trivial; vacuum; vertex; vol; witten; worldsheet
- versions: original; plain text
- ap-1215
- author: Sissakian, A.
- title: The Science Policy of the Joint Institute for Nuclear Research
- date: 2010-01-03
- words: 2945
- flesch: 45
- summary: Prime Minister of Czechia J. Paroubek congratu- lated the audience on the 50th anniversary of JINR and noted the great role of the Dubna international physics centre in founding and developing nuclear physics in all countries – JINR Member States, in- cluding Czechoslovakia and Czechia. JINR has a huge foundation based on three “pillars”: • great experience in nuclear physics research and the world-wide recognized traditions of its scien- tific schools • a large and unique park of basic facilities for fun- damental and applied research • the status of an international intergovernmental organization For over 50 years of JINR’s existence, first-class theoretical and experimental researchprogrammes im- plemented at JINR have led to a significant scientific output in fundamental nuclear science.
- keywords: activities; basic; centre; cern; collaboration; complex; cooperation; countries; czech; czechia; detector; development; dubna; elements; energy; experimental; facilities; fundamental; general; heavy; high; innovation; institute; international; jinr; joint; large; matter; member; new; nica; nuclear; order; phase; physics; policy; polytechnica; priority; programme; projects; reactor; research; role; russian; sciences; scientific; special; states; strategic; studies; university; vol; year
- versions: original; plain text
- ap-1217
- author: Bauer, J.
- title: Single Phase Voltage Source Inverter Photovoltaic Application
- date: 2010-01-04
- words: 2466
- flesch: 64
- summary: Keywords: voltage source inverter, L-C-L filter, hysteresis controller, pulse width modulation. PWM control is used for this purpose.
- keywords: area; calculated; connected; control; controller; converter; current; cycle; design; duty; fig; filter; frequency; grid; hysteresis; inductance; inverter; l filter; mode; network; output; phase; power; pwm; resistor; results; solar; source; supply; switching; system; virtual; voltage
- versions: original; plain text
- ap-1219
- author: Behrens, A.; Röllinger, H.
- title: Analysis of Feature Point Distributions for Fast Image Mosaicking Algorithms
- date: 2010-01-04
- words: 3861
- flesch: 57
- summary: However, in the case of small and sparse sets of feature points of fixed size, suitable for real-time image mosaicking algorithms, a uniform spatial feature distribution across the image becomes relevant. While in many natural image scenes feature points can usually be extracted across the whole image, spatial distribution is often a relevant consideration for medical images, e.g. en- doscopic images of the internal urinary bladder wall.
- keywords: acta; algorithms; anms; bladder; computer; contrast; data; descriptors; different; distribution; errors; feature; feature points; fig; filter; global; high; homography; image; interest; list; local; matching; mosaicking; number; partitioning; points; polytechnica; radius; real; regions; registration; response; results; robust; sample; section; selection; sequence; set; sets; spatial; suppression; surf; time; tree; values; vision; vol
- versions: original; plain text
- ap-1221
- author: Dirix, M.; Koch, O.
- title: Conductivity Measurements of Silverpastes
- date: 2010-01-04
- words: 2783
- flesch: 58
- summary: 3: Transmission measurement of the T-Resonator Structure Table 1: Electrical conductivity measurements using the T-resonator structure Sample σ 50 No. 4/2010 Table 2: Electrical conductivity measurements using the dielectric resonator Sample σ
- keywords: carrier; circuit; conducting; conductivity; conductor; copper; dielectric; electrical; factor; frequency; ghz; high; line; losses; material; measurements; metal; order; pastes; possible; quality; resistance; resonance; resonator; sample; structure; stub; surface; transmission; unloaded; vol; wavelength
- versions: original; plain text
- ap-1223
- author: Drnek, K.
- title: Prague’s Sewerage System in the 1930’ and the General Sewerage Project (1933–1936)
- date: 2010-01-04
- words: 3340
- flesch: 73
- summary: [4] Vondráček, B.: Brief survey about the general conclusion of the committee accredited to judge projects in the competition for new sewage plants for the capital city of Prague. Keywords: sewerage, sewage plant, Máslo-Douda project, Řež, competition, projects, Dorr, Čistá půda, Roztoky.
- keywords: acta; area; biological; citizens; city; cleaning; competition; dorr; douda; group; ideas; ing; island; location; mechanical; mil; new; old; pipelines; plant; polytechnica; prague; problem; process; project; river; roztoky; sand; sewage; sewage plant; sewerage; sludge; survey; system; tanks; treatment; vol; water
- versions: original; plain text
- ap-1225
- author: Faltin, P.; Behrens, A.
- title: Projective 3D-reconstruction of Uncalibrated Endoscopic Images
- date: 2010-01-04
- words: 3716
- flesch: 64
- summary: [11] Pollefeys, M.: Self-calibration and metric 3D re- construction from uncalibrated image sequences. The radial distortion is modeled by the function �xd = �z + λ(r) · (�xu − �z) (1) with distorted point �xd, center of distortion �z, a func- tion depending on the radius λ(r) and corrected point �xu.
- keywords: 4/2010; acta; advanced; algorithm; bladder; camera; computer; correspondences; data; different; distortion; endoscopic; epipolar; error; features; fig; fundamental; geometry; germany; image; matching; matrices; matrix; method; number; point; polytechnica; process; projective; ransac; reconstruction; results; scene; second; section; sequences; set; tensor; trifocal; uncalibrated; view; vol
- versions: original; plain text
- ap-1227
- author: Fikejz, F.
- title: Subjective Evaluation of Audiovisual Signals
- date: 2010-01-04
- words: 3617
- flesch: 66
- summary: Keywords: subjective test, audiovisual signal quality, compression, JPEG, MP3. As subjective test is a type of psychometric test in which the subjects evaluate, in our case, sound and image quality in a defined way.
- keywords: acta; anova; audiovisual; average; best; better; bit; case; combination; compressed; compression; evaluation; experienced; fig; image; jpeg; mean; method; mp3; music; original; polytechnica; processing; quality; rate; rating; reference; results; samples; scale; second; signal; simple; situation; sound; subjective; subjects; tab; table; test; types; values; variance; vol; wav; worst
- versions: original; plain text
- ap-1229
- author: Grabowski, M.; Buchenauer, A.
- title: Valve Concepts for Microfluidic Cell Handling
- date: 2010-01-04
- words: 3682
- flesch: 57
- summary: The first valve geometry (valve type 1) was built up with an interrupted microfluidic chan- 41 Acta Polytechnica Vol. The second valve geometry (valve type 2) was designed without the in- tersection in the fluidic channel, using a microfluidic channel with just a rectangular cross-section (Fig. 3).
- keywords: 4/2010; aachen; acta; ansys; applications; bar; cell; chamber; channel; chip; closed; cross; engineering; fig; flow; fluidic; fluidic channel; fusion; geometry; handling; inlet; layer; lines; liquid; membrane; microfluidic; negative; open; pdms; pneumatic; pneumatic layer; polytechnica; pressure; results; section; series; simulation; state; suitable; system; test; type; user; valve; valve type; vol
- versions: original; plain text
- ap-1231
- author: Hajný, O.; Farkašová, B.
- title: A Study of Gait and Posture with the Use of Cyclograms
- date: 2010-01-04
- words: 2236
- flesch: 63
- summary: Keywords: simulation, human body model, walking, artificial intelligence, gait angles, bilateral cyclograms. 1 Methods For a study of gait angles, we decided to use meth- ods based on measurements of the geometric proper- ties ofbilateral cyclograms(also calledangle-angledia- grams).
- keywords: 4/2010; acta; angles; biomedical; body; camera; coefficients; ctu; cyclograms; data; engineering; fig; function; gait; hip; human; joints; knee; markers; methods; model; movement; polytechnica; program; research; segments; space; study; system; use; vol; walking; weight
- versions: original; plain text
- ap-1233
- author: Hübner, J.
- title: Capillary Discharge Parameter Assessment for X-ray Laser Pumping
- date: 2010-01-04
- words: 2030
- flesch: 64
- summary: For each calculation, we listed the parameter data, information about the maximum value and the time of reaching gain, the pinch time (the time when the maximum of electron density Ne is reached). We will plot the curve for an individual quantity, such as electron density, electron temperature, inversion of population, and gain. Fig.
- keywords: capillary; carbon; cm−3; current; data; density; discharge; dt|t=0; electron; fig; function; gain; gmax; imax; initial; laser; maximum; parameters; pinch; pulse; temperature; time
- versions: original; plain text
- ap-1235
- author: Müntjes, J.; Meine, S.; Flach, E.; Görtz, M.; Hartmann, R.; Schmitz-Rode, T.; Trieu, H. K.; Mokwa, W.
- title: Assembly of a Pulmonary Artery Pressure Sensor System
- date: 2010-01-04
- words: 1678
- flesch: 48
- summary: Her work focuses on assembly technologies in the field of pressure sensor systems in medical technology. Keywords: heart insufficiency, pressure sensor, microsystems technology, assembly.
- keywords: aachen; artery; assembly; capacitive; carrier; catheter; chips; electrical; electronics; element; engineering; fig; germany; heart; hospitalization; institute; metal; pressure; pressure sensor; process; pulmonary; sensor; silicon; stress; system; temperature; tube; university
- versions: original; plain text
- ap-1237
- author: Najman, R.
- title: Nonlinear Aspects of Heat Pump Utilization
- date: 2010-01-04
- words: 2109
- flesch: 65
- summary: 2: Air, water, soil to water heat pumps [*2] 2 Input values and equations 2.1 Subject for testing our mathematical model Our test subject is a house with a surface area of 400 m2 (surfaces with applicable thermal insulation). Keywords: heat pumps, thermal mass of an object, coefficient of performance.
- keywords: air; cop; equations; fig; heat; heating; input; insulation; losses; mass; model; outdoor; output; power; pump; soil; source; temperature; thermal; variant; water; year
- versions: original; plain text
- ap-1239
- author: Pavlátka, P.
- title: Option Derivatives in Electricity Hedging
- date: 2010-01-04
- words: 3264
- flesch: 59
- summary: 50 No. 4/2010 Option Derivatives in Electricity Hedging P. Pavlatka Abstract Despite the high volatility of electricity prices, there is still little demand for electricity power options, and the liquidity on the power exchanges of these power derivatives is quite low. Keywords: option derivatives, electricity hedging, evaluation models, electricity prices.
- keywords: acta; case; cash; commodity; contract; convenience; daily; demand; derivatives; electricity; end; exercise; fig; formula; forward; futures; generators; hedge; hedging; important; increases; long; margin; market; mwh; options; polytechnica; positions; power; price; pricing; results; risk; short; spot; strike; supply; term; value; volatility; yield
- versions: original; plain text
- ap-1241
- author: Scheirich, J.
- title: The DEPFET Mini-matrix Particle Detector
- date: 2010-01-04
- words: 2254
- flesch: 59
- summary: The DEPFET detector will be integrated as an inner detector in the BELLE II and ILC experiment. Keywords: DEPFET, BELLE II, ILC, silicon pixel detector.
- keywords: acta; amplifiers; channel; charge; clear; contact; control; current; czech; daq; depfet; detector; drain; electrons; fig; frame; gate; internal; internal gate; matrix; measuring; mini; monitor; mosfet; noise; particle; physics; pixel; polytechnica; potential; readout; sensor; signal; small; substrate; system; university; voltage
- versions: original; plain text
- ap-1243
- author: Tučan, M.; Žák, P.
- title: Influence of Climatic Cycles on Properties of Leadfree Solders
- date: 2010-01-04
- words: 1444
- flesch: 59
- summary: Keywords: climatic tests, shocks, leadfree solder. Apart from problems such as tin corro- sion and faster oxidation due to higher temperature, which appear in the production phase, there is the matter of the long-term behavior of leadfree solders.
- keywords: change; climatic; cold; conditions; electrical; fig; figure; heat; joints; leadfree; moisture; pest; properties; resistance; results; shocks; solder; surface; temperature; tests; thermal; tin; use
- versions: original; plain text
- ap-1245
- author: Uřičář, T.
- title: Parameter-Invariant Hierarchical Exclusive Alphabet Design for 2-WRC with HDF Strategy
- date: 2010-01-04
- words: 4964
- flesch: 56
- summary: The output code- word and its code symbols are cR and cR. These are mapped into signal space channel symbols v ∈ AR and signal space codewords v with the codebook v ∈ CR andare broadcast to destinations A and B. (1, −1) Fig. 5: Channel symbol mapper (As) and the resulting constellation space patterns (U′iRe) for the example of PI- HXA Here we show an example of a two-dimensional 4- ary (|As| = |Ac| = 4) PI-HXA, designed according to the assumptions given in this section.
- keywords: acta; alphabet; approach; boundaries; capacity; case; channel; classical; code; complex; constellation; criteria; data; decision; design; example; exclusive; fig; forward; hdf; hierarchical; hxa; hxa design; hxc; information; invariant; layered; mac; mapper; mode; node; parameter; parametric; parametrization; patterns; phase; phxc; polytechnica; processing; received; region; relay; signal; simple; solution; source; space; strategy; symbols; system; um1; useful; vol; way; wireless; wrc
- versions: original; plain text
- ap-1247
- author: Valentová, M.
- title: Barriers to Energy Efficiency – Focus on Transaction Costs
- date: 2010-01-04
- words: 5280
- flesch: 56
- summary: Energy efficiency transaction costs can be divided into four main stages in which transaction costs can occur: the planning phase, the implementation phase, monitoring phase and the verification phase (Ta- ble 1). One factor is the actual share of energy costs in total costs, while an- other factor is the development of energy prices.
- keywords: access; acta; actors; audit; authors; barriers; capital; case; consumption; costs; decision; demand; development; different; discount; economic; efficiency; empirical; energy; energy efficiency; energy prices; equipment; future; households; implementation; important; income; information; instruments; investment; lack; lead; level; likely; limited; lower; main; making; market; measures; mundaca; phase; policy; polytechnica; potential; prices; problem; programme; project; rate; related; risk; savings; sector; services; size; source; studies; study; time; transaction; transaction costs; vol
- versions: original; plain text
- ap-1249
- author: Vaněk, O.
- title: Agent-based Simulation of the Maritime Domain
- date: 2010-01-04
- words: 3462
- flesch: 49
- summary: The configuration of the simulation (e.g. the num- ber of vessels, the files containing vessel andGIS data, etc.) as well as the parameters of each of the mod- ules is specified in a single Groovy3 script file4. 50 No. 4/2010 Table 1: Main parameters of different types of vessel agents.
- keywords: 4/2010; acta; agent; algorithms; analysis; architecture; behavior; configuration; control; data; date; description; domain; earth; environment; fishing; general; geographical; google; information; list; main; maritime; model; modules; operational; output; parameters; piracy; pirate; planner; planning; platform; polytechnica; real; route; section; ship; simulated; simulation; simulation step; simulation time; size; somali; state; step; time; traffic; transport; vessel; vol; world; zones
- versions: original; plain text
- ap-1251
- author: Verteletskaya, E.; Sakhnov, K.
- title: Voice Activity Detection for Speech Enhancement Applications
- date: 2010-01-04
- words: 2713
- flesch: 64
- summary: 1. VAD design involves extracting acoustic features that can appropriately indicate the probability of tar- get speech signals existing in observed signals. The performance of the proposed VAD algorithm is tested on real speech signals.
- keywords: 4/2010; acta; active; activity; algorithm; audio; band; czech; decision; detection; detector; energy; estimation; features; fig; frame; frequency; high; input; led; low; noise; output; performance; periodicity; polytechnica; presence; processing; ratio; regions; short; signal; silence; speech; threshold; time; total; vad; value; voice; vol
- versions: original; plain text
- ap-1253
- author: Vrbová, B.; Víšek, L.
- title: Simulation of Hyperthermic Treatment Using the Matrix of Stripline Applicators
- date: 2010-01-04
- words: 2177
- flesch: 47
- summary: In this paper we compare the SAR distribution in a cylindrical homogeneous agar phantom (which has similar characteristics to biological tissue) and in an anatomically based biological model of the femur (which has been developed from a computer tomography scan) using a matrix of two applicators of the same type. In our case, the applicator is filled with distilled water, because 70 % of biological tissue consists of water.
- keywords: 4/2010; acta; agar; applicators; biological; case; cells; dielectric; distribution; dosimetry; electromagnetic; energy; femur; field; fig; homogeneous; hyperthermia; length; matrix; microwave; model; numerical; phantom; planning; polytechnica; prague; sar; stripline; temperature; tissue; treatment; tumor; type; vol
- versions: original; plain text
- ap-1255
- author: Ambrož, P.
- title: Tilings Generated by Ito-Sadahiro and Balanced (-ß)-numeration Systems
- date: 2010-01-05
- words: 3137
- flesch: 80
- summary: On the other hand there are five distances between consecutive elements in the set Z−β, namely {1, β2 − β − 1, β − 1, β, β2 − β}. 6 Examples of tilings In the rest of the paper we provide several examples of tilings associated with β cubic Pisot units, i.e., the minimal polynomial of β is of the form x3 − ax2 − bx ± 1.
- keywords: 5/2010; acta; admissible; balanced; base; case; db,−β; digit; distances; expansion; ito; minimal; negative; number; numeration; pisot; polynomial; polytechnica; rényi; sadahiro; set; string; system; theorem; tilings; vol
- versions: original; plain text
- ap-1257
- author: Amore, P.; Fernández, F. M.
- title: Two-particle Harmonic Oscillator in a One-dimensional Box
- date: 2010-01-05
- words: 3430
- flesch: 72
- summary: 50 No. 5/2010 ϕ(0)n1,n2(q1, q2)= ⎧⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎨ ⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎪⎩ √ 2 − δij {cos[(2i − 1)πq1]cos[(2j − 1)πq2] +cos[(2j − 1)πq1]cos[(2i − 1)πq2]} Ag √ 2{cos[(2i − 1)πq1]cos[(2j − 1)πq2] −cos[(2j − 1)πq1]cos[(2i − 1)πq2]} Bg √ 2{cos[(2i If we assumea linear force between the particles then the Hamiltonian operator reads Ĥ = − h̄2 2 ( 1 m1 ∂2 ∂x21 + 1 m2 ∂2 ∂x22 ) + k 2 (x1 − x2)2 (1) and the boundary conditions are ψ =0 when xi = ±L/2.
- keywords: 5/2010; acta; box; confined; eigenfunctions; eigenvalues; energies; energy; fig; functions; harmonic; linear; lsf; method; model; order; oscillator; perturbation; phys; polytechnica; problem; q21; quantum; sec; states; symmetry; theory; variational; vol
- versions: original; plain text
- ap-1259
- author: Duplij, S.; Sinel’shchikov, S.
- title: On Uq (sl2)-actions on the Quantum Plane
- date: 2010-01-05
- words: 3070
- flesch: 79
- summary: Note that the series labeledwith pairs of nonzero symbolic matrices at both positions are empty, be- cause each such matrix determines a pair of specific weight constants α and β (16)–(19)which fails to co- incide to any pair of such constants associated to the set of nonzero symbolic matrices at the second posi- tion (28)–(32). The symbolic matrix ( � 0 0 � ) 1 can be dis- carded from the list of symbolic matrices with at least one 0 at every row or column, because of (21), 26 Acta Polytechnica Vol.
- keywords: action; algebra; classical; constants; cq[x; e(x)=; e(y)=; matrices; matrix; nonzero; plane; quantum; q−1; structures; symbolic; weight
- versions: original; plain text
- ap-1261
- author: Havlíček, M.; Pelantová, E.; Tolar, J.
- title: On Representations of sl(n, C) Compatible with a Z2-grading
- date: 2010-01-05
- words: 5907
- flesch: 66
- summary: If we do not insist on the irreducibility of representation r, the class of representations compatible with the Z2- grading obtained by the automorphism OutI is larger. I, where I is the identity operator on the representation space of representation r and σ1 denotes the first Pauli matrix.
- keywords: acta; algebra; automorphism; basis; case; compatible; contractions; contragredient; corresponding; decomposition; dimensional; equations; finite; form; gel’fand; graded; grading; group; inner; irreducible; k−1; lie; lie algebra; m1,n; m2,n; matrix; non; order; outer; outi; paper; parameters; patera; polytechnica; r(x; representation; rg2; simulation; sl(n; solutions; space; theory; tseitlin; vector; vol; ⎜⎜⎝; ⎟⎟⎠
- versions: original; plain text
- ap-1263
- author: Havlíček, M.; Pošta, S.
- title: The Diamond Lemma and the PBW Property in Quantum Algebras
- date: 2010-01-05
- words: 3686
- flesch: 74
- summary: − ac − ca − bc and (cb)b = (−ab − ba − ac − ca − bc)b = −ab2 − bab − acb − cab − bcb = −ab − bab − a(−ab − cab − b(−ab − ba − ac − ca − bc)= −ab − bab + a2b + aba + a2c + aca + abc − cab + bab + b2a + bac +
- keywords: aba; abc; aca; acta; algebra; bab; bac; basis; bca; cab; case; casimir; center; complex; diamond; elements; form; generators; irreducible; lemma; monomials; polynomial; polytechnica; quantum; relations; root; rules; unity; vol; ′q(so3; −ab
- versions: original; plain text
- ap-1265
- author: Jakubský, V.
- title: Aharonov-Bohm Effect and the Supersymmetry of Identical Anyons
- date: 2010-01-05
- words: 3031
- flesch: 67
- summary: In addition, we can define W = Q Q̃ = Q̃ Q. (1.12) By contrast, the system described by H0α,− allows singular wave functions.
- keywords: acta; aharonov; anyons; body; bohm; bosons; composite; effect; fermions; field; following; functions; hamiltonian; identical; interaction; magnetic; operators; particles; phys; polytechnica; potential; relations; rev; solenoid; spin; statistics; supersymmetry; system; vol; wave
- versions: original; plain text
- ap-1267
- author: Kalina, M.; Paseka, J.; Riečanová, Z.
- title: Sharply Orthocomplete Effect Algebras
- date: 2010-01-05
- words: 4733
- flesch: 78
- summary: Namely, the center C(E), the compatibility cen- ter B(E) and the set S(E) of sharp elements of Archimedean atomic lattice effect algebras E can be expressed by set-theoretical operations on their atomic blocks. Lattice effect algebras are in some sense a nearest common generalization of orthomodular lattices [13] that may include non- compatible pairs of elements, and MV-algebras
- keywords: algebra; algebra e; archimedean; atomic; bifull; block; c(e; complete; dominating; effect; effect algebra; elements; iff; lattice; lattice effect; orthocomplete; orthogonal; orthomodular; riečanová; s(e; set; sharp; sub; system; theorem
- versions: original; plain text
- ap-1269
- author: Kochan, D.
- title: Does a Functional Integral Really Need a Lagrangian?
- date: 2010-01-05
- words: 2478
- flesch: 66
- summary: Scl = κ 4 (q1 − q0) (q0 +3q1)e −κt1 − (q1 +3q0)e−κt0 e−κt0 − e−κt1 and A(q1, t1|q0, t0)= √ κ [1], the probability amplitude of the transition of a system fromthe space-time con- figuration (q0, t0) to (q1, t1) is given as follows: A(q1, t1 | q0, t0) ∝∫
- keywords: a(q1; acta; classical; dissipative; equation; extended; feynman; formula; functional; hamiltonian; hdt; integral; kochan; lagrangian; motion; padq; path; phase; phys; polytechnica; probability; quantization; quantum; scl; space; surface; systems; vol
- versions: original; plain text
- ap-1271
- author: Mine, T.
- title: Self-adjoint Extensions of Schrödinger Operators with ?-magnetic Fields on Riemannian Manifolds
- date: 2010-01-05
- words: 7281
- flesch: 84
- summary: The case X = Y = A† can be treated similarly. V = 0 (but Γ = ∅) is exhaustively studied.
- keywords: a(0; a(1; acta; adjoint; aharonov; assume; assumption; bohm; case; closed; continuous; coordinate; c∞0; d(hmax; d(lk; d(x; deficiency; define; definition; extensions; field; following; follows; form; function; gmn; hmin; independent; inverse; k=1; lemma; linear; local; magnetic; map; max; min; operator; polytechnica; proof; proposition; second; section; self; space; step; subspaces; term; theorem; theory; vector; vol; χkf; ψ−1k
- versions: original; plain text
- ap-1273
- author: Rotter, I.
- title: Exceptional Points and Dynamical Phase Transitions
- date: 2010-01-05
- words: 2695
- flesch: 57
- summary: The nar- row resonance states appear due to resonance trap- ping, i.e. as a consequenceof the alignmentof a small number of resonance states to the environment (for details see [2]). Furthermore, the number of trapped resonance states is smaller than the number of individual (basic) states.
- keywords: continuum; coupling; discrete; dynamical; eigenfunctions; environment; exceptional; hermitian; level; non; number; open; operator; parameter; phase; physics; points; quantum; regime; resonance; resonance states; states; system; transition; wavefunctions
- versions: original; plain text
- ap-1275
- author: Shapiro, B.
- title: Root Asymptotics for the Eigenfunctions of Univariate Differential Operators
- date: 2010-01-05
- words: 3188
- flesch: 70
- summary: The Cauchy transform C(z) of the asymptotic root measure μ of the scaled eigenpolynomial qn(z) = pn(n dz) of a degenerate T satisfies the following al- gebraic equation for almost all complex z: zj0Cj0(z)+ ∑ j∈A αj,degQj z degQj Cj(z)= 1, where A is the set consisting of all j for which the maximum d := max j∈[j0+1,k] ( j − j0 j − degQj ) is attained, i.e. A = {j : (j − j0)/(j − degQj)= d}. I)(z + I)(z − 2+3I)(z − 3 − 2I) d4 dz4 ; T3 = (z − I)(z +
- keywords: acta; asymptotic; cauchy; coefficients; corresponding; definition; degenerate; degree; eigenfunctions; equation; examples; fig; finite; lines; math; measure; operator; p(z; pn(z; polynomial; polytechnica; problem; qk(z; root; sequence; shapiro; solvable; spectral; stokes; theorem; union; vol; z2l
- versions: original; plain text
- ap-1277
- author: Znojil, M.
- title: Rectifiable PT -symmetric Quantum Toboggans with Two Branch Points
- date: 2010-01-05
- words: 3892
- flesch: 65
- summary: This formula guarantees the P T symmetry of the re- sulting contour aswell as the stability of the position of our pair of branch points. In an opposite direction one could also contem- plate tobogganic models where a larger number of branch points would have to be taken into account.
- keywords: )(s; acta; branch; c(0)(s; certain; change; circle; complex; contours; critical; curve; descriptors; equation; equivalent; fig; figures; lett; line; models; non; nontrivial; numerical; phys; points; polytechnica; present; quantum; real; rectifiable; ref; schrödinger; shift; single; spectra; straight; symmetry; tobogganic; transition; vol; znojil; ψn(x
- versions: original; plain text
- ap-1279
- author: Augustin, R.; Koleňák, R.
- title: Microstructure of the Transitional Area of the Connection of a High-temperature Ni-based Brazing Alloy and Stainless Steel AISI 321 (X6CrNiTi 18–10)
- date: 2010-01-06
- words: 2578
- flesch: 56
- summary: Connections between Ni-based brazing alloys (NI 102) with a small content of B and AISI 321 stainless steel (X6CrNiTi 18–10) were created in a vacuum (10−2 Pa) at various brazing temperatures and for various holding times at the brazing temperature. Keywords: NI 102 brazing alloy, AISI 321, wetting, chemical microanalysis, diffusion zones.
- keywords: aisi; alloy; boundaries; brazing; brazing alloy; chemical; diffusion; fig; high; holding; influence; interface; microanalysis; min; parameters; solubility; specimens; stainless; temperature; time; wetting; zone
- versions: original; plain text
- ap-1281
- author: Ceres, D.; Jirout, T.; Rieger, F.
- title: Pitched Blade Turbine Efficiency at Particle Suspension
- date: 2010-01-06
- words: 1339
- flesch: 67
- summary: This paper deals with effect relative impeller size and particle content on the efficiency of a pitched six-blade turbine at particle suspension. Keywords: Pitched blade turbine, particle suspension, agitator efficiency.
- keywords: agitator; blade; concentration; content; diameter; fig; impeller; liquid; measurements; mixing; particle; power; rieger; solid; speed; suspension; vessel; volumetric
- versions: original; plain text
- ap-1283
- author: Čech, I.
- title: A Model of Active Roll Vehicle Suspension
- date: 2010-01-06
- words: 4851
- flesch: 68
- summary: Load transfer ratio front and rear Sw1/sst1 = kw1(Zw1 − Zk1)/sst1, Sw2/sst2 = kw2(Zw2 − Zk2)/sst2. where the static forces are sst1 = 2(mb + ms + mw)agxw2/xw, sst2 = 2(mb + ms + mw)agxw1/xw Seat-body displacements front and rear Zsb1 =Zs1 − Zb, Zsb2 =Zs2 − Zb Dynamic-to-static ratio of lateral forces between wheels and road, front and rear Sy1/sst1 = ky1Yky1/sst1, Sy2/sst2 = ky2Yky2/sst2. [N] Sqs Sf qs sqs lateral force in the joint due to the seat
- keywords: acceleration; acta; active; actuator; axis; axle; body; centre; constant; control; damping; displacement; dynamic; effective; equation; fig; force; frequency; gyration; height; impulse; inertia; input; joint; lateral; lateral acceleration; load; low; mass; model; moments; motion; parameters; passive; polytechnica; proportional; radius; rear; road; roll; seat; solid; spring; sqb; sqs; sst1; sst2; stability; static; stiffness; suspension; tyre; values; variant; vehicle; vertical; vol; wheel; zr2; zw2
- versions: original; plain text
- ap-1285
- author: Ficker, T.
- title: Fractality of Fracture Surfaces
- date: 2010-01-06
- words: 4289
- flesch: 70
- summary: Keywords: fractal dimension, fracture surfaces, porous materials, compressive strength. 3 Explanatory remarks and discussion The following paragraphs provide comments on the proposed concept of fractal compressive strength in order to clarify all its crucial points.
- keywords: 3−di; 6/2010; balshin; case; cement; clusters; compact; components; compressive; dependence; different; dimension; euclidean; ficker; fractal; fracture; function; i=0; length; materials; model; non; number; pcr; phys; point; polytechnica; porosity; porous; relation; sample; size; solid; space; spheres; strength; structure; surfaces; vol; volume
- versions: original; plain text
- ap-1287
- author: Hassan, A. H.; Rahoma, U. A.; Sabry, M.; Fathy, A. M.
- title: Color Portion of Solar Radiation in the Partial Annular Solar Eclipse, October 3rd, 2005, at Helwan, Egypt
- date: 2010-01-06
- words: 4767
- flesch: 58
- summary: Keywords: diffuse infrared solar radiation, partial solar eclipse, meteorological data, optical depth, transparency, linke turbidity and Angstrom turbidity. Due to the decreasing fraction of direct radiation at shorter wavelengths, all three parame- ters showed much weaker cloud shading effects than global solar radiation.
- keywords: absorption; acta; air; atmospheric; bands; color; components; day; depth; different; diffuse; direct; duration; eclipse; egypt; fig; fraction; gir; global; guv; helwan; high; higher; hourly; infrared; low; maximum; measurements; optical; percentage; polytechnica; portion; radiation; region; shows; solar; solar eclipse; solar radiation; spectral; temperature; total; transparency; turbidity; ultraviolet; values; variation; vol; wavelength
- versions: original; plain text
- ap-1289
- author: Jirsa, J.; Žáček, J.
- title: UML-oriented Risk Analysis in Manufacturing Systems
- date: 2010-01-06
- words: 3769
- flesch: 62
- summary: Keywords: risk analysis, Unified Modelling Language, manufacturing systems. For this we need risk analysis.
- keywords: acta; activity; analysis; application; behaviour; better; cable; case; classes; core; czech; description; diagram; example; failures; fig; hazards; important; language; line; management; manufacturing; method; modelling; necessary; new; object; paper; pay; polytechnica; portal; possible; potential; process; processing; reel; risk; risk analysis; scenarios; sequence; software; specific; steps; systems; technical; techniques; technological; tools; uml; unified; unit; use; vol
- versions: original; plain text
- ap-1291
- author: Kopecký, M.
- title: Ensemble Empirical Mode Decomposition: Image Data Analysis with White-noise Reflection
- date: 2010-01-06
- words: 4070
- flesch: 65
- summary: This is due to the use of a finite, not infinitesimal, amplitude of white noise which forces the ensemble to exhaust all possible solutions in the sifting process. The main purpose of adding white noise was to provide a uniform reference frame in the time–frequency space.
- keywords: acta; adaptive; analysis; approach; comparison; cube; data; decomposition; different; dyadic; edge; eemd; emd; empirical; ensemble; example; fig; filter; fluctuations; frequency; highs; huang; image; imfs; input; intermittent; introduction; line; local; lows; main; mean; method; mixing; mode; noise; number; original; panel; polytechnica; process; result; scale; series; set; sifting; signal; test; time; vol; white; white noise
- versions: original; plain text
- ap-1293
- author: Laurent, R.; Henriet, J.; Gschwind, R.; Makovicka, L.
- title: A Morphing Technique Applied to Lung Motions in Radiotherapy: Preliminary Results
- date: 2010-01-06
- words: 5741
- flesch: 59
- summary: 1.2 Simulation of lung motions The aim of simulating lung motion is to minimize radiation exposure due to 4DCT and to help trace the accurate motion of the lung. The first section of this paper begins with a brief review of organ motion in radiotherapy, followed by an overview of the simulation of lung motion, as well as anoverviewofmorphingalgorithmsand toolsused inmedicine.
- keywords: account; acta; algorithm; approach; biol; brain; breathing; contour; cycle; data; deformable; deformation; different; dimensions; end; expiration; fig; files; final; geometrical; ieee; image; imaging; implemented; important; input; inspiration; intermediate; lines; lung; medical; method; model; motion; number; order; organ; patient; phase; phys; polytechnica; radiation; radiotherapy; registration; respiratory; results; scan; section; simulation; slice; step; study; table; target; technique; transformation; treatment; tumour; use; vol; voxels; vsource
- versions: original; plain text
- ap-1295
- author: Nerádová, M.; Kovačócy, P.
- title: Welding of Aluminum Using a Pulsed Nd:YAG Laser
- date: 2010-01-06
- words: 1775
- flesch: 59
- summary: Because of the possibility of assessing the impact of voltage-inspiring geometry, penetration welding was carried out at voltages 350 V and 375 V. Based on themeasureddimensions influencesof voltageenergy, pulse duration and standoff distance on the weld ge- ometrywereevaluated. Keywords: welding parameters, laser welding, aluminum, weldability of aluminum.
- keywords: acta; aluminum; beam; fig; geometry; hardness; heat; high; internet; joints; laser; material; max; metal; microstructure; oxidic; parameters; pass; passes; penetration; polytechnica; surface; use; vol; welding; welds
- versions: original; plain text
- ap-1297
- author: Provazník, M.; Koleňák, R.
- title: A Study of the Interface of Soldered Joints of SnInAgTi Active Solder with Ito Ceramics
- date: 2010-01-06
- words: 1653
- flesch: 61
- summary: 3: DTA of SnInAgTi solder Fig. 4: Microstructure of SnInAgTi active solder [3] Fig. 4 presents the heterogeneous microstructure of theSnInAgTi soft active solder in themolten state. Keywords: ultrasonic activation, active solder, ITO (indium-tin oxide) ceramics.
- keywords: acta; activation; active; analysis; ceramics; cooling; creation; element; fig; high; indium; interface; ito; joint; materials; metal; phases; polytechnica; power; sninagti; soft; solder; soldering; temperature; ultrasonic; ultrasound; use; vol
- versions: original; plain text
- ap-1299
- author: Sivkov, O.
- title: Practical Results of a Five-level Flying Capacitor Inverter
- date: 2010-01-06
- words: 3638
- flesch: 61
- summary: f angular frequency L = x/Ω inductance Z = √ RR + XX impedance Uc01 =3/4U dc initial voltage on the capacitor C1 Uc02 =1/2U dc initial voltage on the capacitor C2 Uc03 =1/4U dc initial voltage on the capacitor C3 Fig. 4: Output voltage Uout, output current Iout and flying capacitor voltages Uc1, Uc2 and Uc3 of five-level FCMI with a resistive inductive load Fig. 5: A zoom-in of output voltage Uout, output current Iout and capacitor voltages Uc1, Uc2, Uc3 shown in Fig. 4 77 Acta Polytechnica Vol. The lower levels on phase outputs A, B, C are achievedas the difference between supply voltage Udc and capacitor voltages Uc1,2,3.
- keywords: amplitude; capacitor; control; converters; current; experimental; fcmi; fig; frequency; igbt; input; inverter; level; level fcmi; load; multilevel; number; output; output voltage; phase; polytechnica; power; resistance; results; scheme; simulation; simulink; source; states; strategy; switches; switching; topology; uc1; uc2; uc3; umax; uout; values; voltage
- versions: original; plain text
- ap-1301
- author: Šimáně, Č.
- title: Non Mechanical (Mezic) Type Forces in the Foundations of Quantum Mechanics
- date: 2010-01-06
- words: 3244
- flesch: 55
- summary: dt = μ(�v + �u)[div�u(�v + �u)+div�v(�v + �u)]δV = μ�v div�vδV + μudiv�uδV (9) Then the equations of motion of the unit volume el- ement take the form μ d�v dt + μ d�u dt +�v [( ∂μ ∂t ) �u +�v∇μ ] + μ�v div�v + �u [( ∂μ ∂t ) �v + �u∇μ ] + μ�udiv�u + e m μ∇ϕ + �uq =0 (10) or by putting together the third and the fourth, and the fifth, sixth and the lastmember members in (10) μ d�v dt +�v [( ∂μ ∂t ) �u +div(μ�v) ] + e m μ∇ϕ+ μ d�u dt + �u [( ∂μ ∂t ) �v +div (μ�u) ] + �uq =0 (11) Here again the partial timederivativesmust be taken at �v and �u constant. dV (2) as a sum consisting of two Lagrangeans in which the integrand is the sum of the densities of the kinetic potentials corresponding to the motions with uncor- related velocities �v and �u(rot�v = rot�u = 0) and the 81 Acta Polytechnica Vol.
- keywords: classical; cloud; continuity; continuous; density; electrical; electron; equation; existence; field; forces; form; independent; matter; mechanical; member; mezic; motion; non; nucleus; particle; potential; quantum; schrödinger; state; steady; substance; time; velocity; volume
- versions: original; plain text
- ap-1303
- author: Zamarovský, P.
- title: Cosmos, Time and Creation (Remarks to the Philosophical, Theological and Physical Conceptions of Creation)
- date: 2010-01-06
- words: 2283
- flesch: 55
- summary: Keywords: Big Bang, creation, cosmos, time scale, imaginary time, horizon, singularity. 50 No. 6/2010 Cosmos, Time and Creation Remarks to the Philosophical, Theological and Physical Conceptions of Creation P. Zamarovský Abstract The concept of the beginning of Cosmos appears to be problematic.
- keywords: acta; ancient; approaches; bang; beginning; big; century; chronometric; clocks; concept; conceptions; cosmos; creation; czech; day; definition; genesis; god; horizon; imaginary; new; ordering; ordinary; philosophical; physical; physics; polytechnica; processes; scale; singularity; theological; thomas; time; universe; vol; world
- versions: original; plain text
- ap-1305
- author: Živčák, J.; Roško, M.
- title: How to Protect Patients Digital Images/Thermograms Stored on a Local Workstation
- date: 2010-01-06
- words: 2776
- flesch: 54
- summary: Auditing fingerprint logon attempts generates security events, depending on whether the audit of successes or failures, or both (in our case we audited both), is enabled. Fingerprints cannot be forgotten, shared or misplaced.
- keywords: acceptance; access; attempts; authentication; biometric; cit; claim; digital; enrollee; error; failed; false; far; fingerprint; fraud; frr; genuine; identity; images; information; line; logins; logon; negative; notebook; number; positive; process; rates; reader; recognition; reject; security; successful; system; tab; table; thermograms; total; true; user; vol; windows
- versions: original; plain text
- ap-1306
- author: Blažek, M.; Anisimova, E.; Páta, P.
- title: Application of Wavelet Transform for Image Denoising of Spatially and Time Variable Astronomical Imaging Systems
- date: 2011-01-01
- words: 2269
- flesch: 61
- summary: Fig. 3: Test image for wavelet transform 2.1 Results of the denoising We observed the changes of the standard deviation of the sky (background) value depending strongly on the decomposition level and the intensities of the nearby stars. Only soft thresholding [9] was ap- plied, due to its better peak signal to noise ratio for image denoising, and no thresholding was done to 1http://www.mathworks.com/ 2http://iraf.noao.edu/ 12 Acta Polytechnica Vol.
- keywords: acta; algorithms; application; astronomical; biorthogonal; changes; data; decomposition; denoising; detection; field; function; image; influence; level; new; noise; photometry; polytechnica; processing; psf; standard; stellar; systems; table; transform; variant; vol; wavelet; wide; δmmax
- versions: original; plain text
- ap-1308
- author: Castro-Tirado, A. J.
- title: Robotic Astronomy and the BOOTES Network of Robotic Telescopes
- date: 2011-01-01
- words: 2464
- flesch: 58
- summary: 1: Distribution of robotic telescopes in the world 1following the consensus reached after one hour of discussion amongst the 80 participants who attended the “Workshop in Robotic Autonomous Observatories”, held in Málaga (Spain) on May 18–21, 2009. Nowadays it consists of 4 stations, three of them hosting 60 cm fast slewing robotic telescopes aimed at contributing significantly to various scientific fields.
- keywords: 10′; acta; astronomical; astronomy; bootes; bootes-2; camera; castro; ccd; coordinator; different; field; fig; filters; fov; grbs; new; observation; observatories; observer; optical; polytechnica; ray; reflector; robotic; sky; spain; station; system; telescope; tirado; transient; vol
- versions: original; plain text
- ap-1310
- author: Giovannelli, F.; Sabau-Graziati, L.
- title: X-ray Transient Sources (Multifrequency Laboratories) The Case of the Prototype A0535+26/HDE 245770
- date: 2011-01-01
- words: 6787
- flesch: 66
- summary: The shape and intensity of X-ray outbursts are dependent on the strength of the activity of the primary. Thus the passage of the neutron star at the periastron occurs with a periodicity of 110.856 ± 0.02 days and the different kinds of X-ray outbursts of A0535+26 — following the definitions reported in the reviewbyGiovannelli & Sabau-Graziati (1992) —occur just after ∼ 8 days.
- keywords: a0535; acta; activity; bartolini; caballero; case; companion; cycle; days; emission; energy; et al; fig; flavia; giovannelli; giovannelli et; graziati; guarnieri; hde; high; lines; luminosity; mass; measurements; multifrequency; neutron; neutron star; october; optical; orbital; outbursts; passage; periastron; period; polytechnica; primary; pulsar; ray; ray outburst; red; sabau; sources; star; stellar; strong; system; time; vol; wind; xray
- versions: original; plain text
- ap-1312
- author: Grinberg, V.; Kreykenbohm, I.; Fürst, F.; Wilms, J.; Pottschmidt, K.; Bel, M. Cadolle; Rodriguez, J.; Marcu, D. M.; Suchy, S.; Markowitz, A.; Nowak, M. A.
- title: Timing Analysis with INTEGRAL: Comparing Different Reconstruction Algorithms
- date: 2011-01-01
- words: 2087
- flesch: 58
- summary: The power spectrum densities (PSDs) calculated from the above discussed ii light lightcurves are shown in Fig. So while a better noise correction is re- quired, ii light lightcurves are still well suited for timing studies with a 10s to 0.1s resolu- tion in the regime above 20keV. 4 Summary and Conclusions We have shown that it is possible to perform tim- ing studies with a resolution of up to 0.1 s with IN- TEGRAL when using the ii light tool.
- keywords: 10s; analysis; band; consistent; countrates; cyg; different; extract; extraction; field; fig; grs; image; integral; light; lightcurves; offset; resolution; results; scws; source; time; timing; usa; x-1
- versions: original; plain text
- ap-1314
- author: Hudec, R.; Blažek, M.; Hudcová, V.
- title: Czech Participation in the INTEGRAL Satellite: A Review
- date: 2011-01-01
- words: 2932
- flesch: 63
- summary: The results of the first 7 years of investigations of various scientific targets e.g. cataclysmic variables, blazars, X-ray sources, and GRBs with the ESA INTEGRAL satellite with Czech participation are briefly presented and discussed. [26] Hudec, R. et al.: Nuclear Physics B Proceedings Supplements, 2007, Vol. 166, p. 255–257.
- keywords: acta; blazars; camera; cataclysmic; curve; cvs; czech; data; deg; esa; et al; fig; fov; gamma; hard; high; hudec; ibis; integral; ips; kev; light; objects; observations; omc; optical; paper; participation; polytechnica; project; ray; rays; related; republic; results; satellite; sources; time; variables; vol
- versions: original; plain text
- ap-1316
- author: Hudec, R.; Pína, L.; Maršíková, V.; Inneman, A.; Skulinová, M.; Míka, M.
- title: Czech Participation in International X-Ray Observatory (IXO)
- date: 2011-01-01
- words: 3960
- flesch: 58
- summary: Keywords: X-ray satellites, X-ray telescopes, X-ray optics. 1 Introduction The design and development of X-ray optics has a long tradition in the Czech Republic (e.g. Hudec et al., 1991, 1999, 2000, 2001, Inneman et al. 1999, 2000).
- keywords: accuracy; alternative; athena; czech; design; development; esa; fig; forming; future; glass; high; hudec; imaging; inneman; ixo; large; microroughness; mirrors; optical; optics; order; parameters; prague; precise; process; project; ray; ray optics; republic; required; samples; silicon; space; spie; surface; technologies; technology; telescopes; thermal; vol; wafers; wolter
- versions: original; plain text
- ap-1318
- author: Hudec, R.; Hudec, L.; Klíma, M.
- title: Ultra Low-Dispersion Spectroscopy with Gaia and Photographic Objective Prism Surveys
- date: 2011-01-01
- words: 2865
- flesch: 56
- summary: 51 No. 2/2011 5 Conclusion Variability studies based on low-dispersion spectra are expected to provide unique novel data, and can use the algorithms recently developed for automatic analyses of digitized spectral Schmidt plates. The nearest analogy is digitized prism spectral plates: the Sonneberg, PARI, Hamburg and Byurakan surveys.
- keywords: acta; algorithms; astronomical; byurakan; classification; czech; data; deg; digitized; dispersion; emission; esa; fig; figure; gaia; henize; hudec; images; large; lines; low; mode; objective; objects; pari; photometric; pixel; plates; polytechnica; prism; resolution; schmidt; sky; southern; spectral; spectroscopy; stars; straizys; survey; telescope; ultra; vol
- versions: original; plain text
- ap-1320
- author: Hudec, R.
- title: The Puzzle of V407 Cygni
- date: 2011-01-01
- words: 1603
- flesch: 65
- summary: 1 Introduction V407 Cyg is a symbiotic binary harboring a Mira variable, of 745 day pulsation and a possible orbital period of 43 years, at a distance of 2.5/3.0 kpc and a reddening of E(B − V ) = 0.5/0.6 (Munari et al. 1990). 51 No. 2/2011 Fig. 1: The historical light curve of V407 Cyg (Munari et al., 1990) Fig. 2: INTEGRAL IBIS observation of the V407 Cyg position (Bassani, 2010) shows the new transient to be located between two persistent hard X-ray sources, with no confirmation of the transient detection Fig.
- keywords: aql; astronomical; atel; box; cbet; cyg; czech; et al; fermi; gamma; hudec; mira; munari; object; observations; optical; outburst; possible; ray; republic; source; star; symbiotic; transient; v407; variable; vol
- versions: original; plain text
- ap-1322
- author: Chernenko, A.
- title: On the Intrinsic Simplicity of Spectral Variability of GRBs
- date: 2011-01-01
- words: 2766
- flesch: 58
- summary: This analysis allows us to identify time intervals where emission variability can be reduced to a single physical parameter and can therefore be robustly attributed to a single physical emitter. [1..N ], N being the total number of time intervals for a given GRB.
- keywords: acta; analysis; correlation; curves; different; dimensional; eigenvalues; emission; energy; entire; figure; gamma; individual; intervals; light; matrices; matrix; multi; non; number; panel; polytechnica; properties; ray; scale; series; single; spectral; sub; time; variability; vol
- versions: original; plain text
- ap-1324
- author: Kovács, A.; Bagoly, Z.; Balázs, L. G.; Horváth, I.; Veres, P.
- title: Cosmology with Gamma-Ray Bursts Using k-correction
- date: 2011-01-01
- words: 1831
- flesch: 72
- summary: The output of the calculations is the comoving isotropic energy Eiso, but this is not the endpoint: this data can be useful for estimating the ΩM parameter of the Universe and for making a GRB Hubble diagram using Amati’s relation. The Prompt Energy Re- lease of Gamma-Ray Bursts using a Cosmological k-Correction, The Astronomical Journal, 2001, Vol. 121, Issue 6, pp.
- keywords: amati; budapest; bursts; correlation; data; distribution; eiso; energy; figure; fluence; gamma; grb; hungary; issue; parameters; ray; relation; results; university; vol
- versions: original; plain text
- ap-1326
- author: Kreykenbohm, I.; Fürst, F.; Barrágan, L.; Wilms, J.; Rothschild, R. E.; Suchy, S.; Pottschmidt, K.
- title: 4U 1909+07: a Hidden Pearl
- date: 2011-01-01
- words: 3548
- flesch: 73
- summary: Neither the photoelectric absorption nor the power law index Γ varies with pulse phase. The temperature kT of the blackbody on the other hand does not change with pulse phase.
- keywords: 4u1909; accretion; acta; analysis; apj; best; blackbody; cutoffpl; data; energies; energy; field; figure; high; integral; kev; line; magnetic; model; neutron; parameters; pca; peak; period; phase; polytechnica; profile; pulse; ray; resolution; rxte; source; spectral; spectrum; star; strong; time; vol; wilms
- versions: original; plain text
- ap-1328
- author: Lovisari, L.; Schindler, S.; Kapferer, W.
- title: XMM Observations of Metal Abundances in Galaxy Clusters
- date: 2011-01-01
- words: 2173
- flesch: 63
- summary: Due to the large potential wells of galaxy clusters they retain all the enriched material. [3] Kapferer, W., Ferrari, C., Domainko, W., Mair, M., Kronberger, T., Schindler, S., Kimes- wenger, S., van Kampen, E., Breitschwerdt, D., Ruffert, M.: Simulations of galactic winds and starbursts in galaxy clusters, A & A, 447, 2006, p. 827.
- keywords: cluster; distribution; enrichment; galactic; galaxies; galaxy; gas; high; icm; iron; kapferer; maps; metallicity; metals; newton; pressure; ram; schindler; stripping; temperature; winds; xmm
- versions: original; plain text
- ap-1330
- author: Mészáros, A.; Řípa, J.; Balázs, L. G.; Bagoly, Z.; Veres, P.; Horváth, I.
- title: Cosmology and the Subgroups of Gamma-ray Bursts
- date: 2011-01-01
- words: 922
- flesch: 69
- summary: 51 No. 2/2011 Cosmology and the Subgroups of Gamma-ray Bursts A. Mészáros, J. Ř́ıpa, L. G. Balázs, Z. Bagoly, P. Veres, I. Horváth Abstract Both short and intermediate gamma-ray bursts are distributed anisotropically in the sky (Mészáros, A. et al. ApJ, 539, 98 (2000), Vavrek, R. et al. MNRAS, 391, 1741 (2008)). T90 is in seconds; for definitions of hardness, durationT90 and formore details see Horváth et al.:
- keywords: apj; bursts; et al; fig; gamma; grbs; horváth; mészáros; ray; redshifts; short
- versions: original; plain text
- ap-1332
- author: Miškovičová, I.; Hanke, M.; Wilms, J.; Nowak, M. A.; Pottschmidt, K.; Schulz, N. S.
- title: Spectroscopy of the Stellar Wind in the Cygnus X-1 System
- date: 2011-01-01
- words: 3409
- flesch: 70
- summary: The distribution of X-ray dips with or- bital phase peaks around phase 0.0 [1]. The distribution of X-ray dips with orbital phase in Cygnus X-1, MNRAS, 311, 2000, p. 861–868.
- keywords: absorption; accretion; astrophys; binaries; binary; black; chandra; clumps; color; curve; cygnus; different; dipping; dips; fig; hard; high; hole; light; lines; mass; mode; non; observations; obsid; orbital; phase; present; ray; soft; spectra; spectrum; star; state; stellar; strong; structure; system; time; transitions; wind; x-1
- versions: original; plain text
- ap-1334
- author: Řeřábek, M.; Páta, P.
- title: Advanced Processing of Images Obtained from Wide-field Astronomical Optical Systems
- date: 2011-01-01
- words: 3716
- flesch: 59
- summary: An experiment for estimating the optical aber- rations of real optical systems was implemented. Optical aberrations models for linear space invariant and variant (LSI/LSV) systems are there- fore outlined in this paper.
- keywords: aberration; acta; algorithm; astronomical; characteristics; coma; data; deconvolution; distance; error; field; figure; fov; function; gaussian; image; image data; invariant; measurements; model; object; optical; optical system; original; polytechnica; processing; profile; psf; real; space; star; system; transfer; use; uwfc; variant; wavefront; wide; zernike; |m|
- versions: original; plain text
- ap-1336
- author: Schindler, J.; Páta, P.; Klíma, M.; Fliegel, K.
- title: Astronomical Image Compression Techniques Based on ACC and KLT Coder
- date: 2011-01-01
- words: 3286
- flesch: 55
- summary: [9] seems to be a better solution for astronomical image data compression. Keywords: astronomical image compression, Karhunen-Loève transform, dark frame compression, loss less compression algorithm, Astronomical Context Coder (ACC), JPEG 2000.
- keywords: acc; acta; algorithms; astronomical; background; better; bootes; coder; coding; comparison; compression; context; czech; dark; data; deep; error; estimation; field; figure; flat; format; image; input; jpeg2000; klt; loève; lossless; lossy; methods; multimedia; new; noise; pixel; polytechnica; processing; properties; ratio; results; reversible; scientific; set; sky; specific; system; technique; transform; vol; wavelet
- versions: original; plain text
- ap-1338
- author: Sokołowski, M.; Należyty, M.; Majczyna, A.; Wawrzaszek, R.; Wajer, P.
- title: Searching for Space Debris Elements with the “Pi of the Sky” System
- date: 2011-01-01
- words: 3012
- flesch: 61
- summary: 51 No. 2/2011 Distance to closest satellite Entries 9660 Mean 8346 RMS 4750 Distance from event to closest satellite [arcsec] 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 N u m b e r o f e v e n ts 210 Distance to closest satellite Entries 9660 Mean 8346 RMS 4750 = 1800’’satR Night 20070526 MC Distance to closest satellite : night 20070526 and MC Fig. 2: The image on the left shows the distribution of the distance from a flash event candidate to the closest satellite from the catalog, for events found by the coincidence algorithm during night of 2007.05.26/27. 51 No. 2/2011 Fig. 7: Example of a text file containing satellite observational data and χ2par/χ 2 line < 2, parabolic fit parameters are cho- sen.
- keywords: algorithms; analysis; closest; data; database; debris; earth; elements; events; figure; geostationary; image; large; line; moving; new; night; normal; objects; observations; optical; orbit; orbital; order; parameters; polytechnica; prototype; satellites; single; sky; space; space debris; system; track; transients; vol
- versions: original; plain text
- ap-1340
- author: Vítek, S.; Fliegel, K.; Páta, P.; Koten, P.
- title: MAIA: Technical Development of a Novel System for Video Observations of Meteors
- date: 2011-01-01
- words: 1533
- flesch: 53
- summary: Keywords: imaging systems, image processing, ethernet camera, image intensifier, system testing, astronomy, meteors. 1 Introduction Double station observation of meteors using two video systems coupled with image intensifiers started at the Ondřejov observatory about a decade ago[1].
- keywords: analog; automatic; camera; current; czech; ethernet; image; image intensifier; input; intensifier; lens; measured; meteors; mtf; new; observation; output; overall; paper; resolution; response; spatial; spectral; system; video
- versions: original; plain text
- ap-1342
- author: Żarnecki, A. F.; Małek, K.; Sokołowski, M.
- title: Improving the Photometry of the Pi of the Sky System
- date: 2011-01-01
- words: 2394
- flesch: 53
- summary: With a new calibration algorithm taking into account the spectral type of reference stars, the stability of the photometry algorithm can be significantly improved. This is an iteration procedure where stars from the list are matched against reference stars from the catalog (the TYCHO catalog is currently used).
- keywords: algorithms; analysis; average; bgind; cameras; catalogue; ccd; correction; data; detector; fast; field; fig; figure; filter; las; line; magnitudo; measurements; new; optical; photometry; physics; precision; prototype; ray; reference; sky; spectral; stars; system; time; university; variable; warsaw
- versions: original; plain text
- ap-1344
- author: Ananikian, N.; Ananikyan, L.; Chakhmakhchyan, L.; Kocharian, A.
- title: Thermal Entanglement and Critical Behavior of Magnetic Properties on a Triangulated Kagomé Lattice
- date: 2011-01-02
- words: 3562
- flesch: 63
- summary: Thus, the Kagomé lattice of the Ising spins (monomers) con- tains inside each triangle unit a smaller triangle of Heisenberg spins (trimer). There is a strong Heisenberg Jaa (antiferro) exchange coupling between trimeric sites of type a and a weaker Ising-type (ferro) exchange (Jab) be- tween trimeric types a and monomeric b.
- keywords: 3λaa; acta; behavior; bogoliubov; c(ρ; concurrence; critical; density; effective; entanglement; exchange; features; field; fig; frustrated; gibbs; heisenberg; inequality; interactions; isotropic; jaa; kagomé; lattice; magnetic; model; non; phase; phys; polytechnica; properties; quantum; rev; sec; sites; spins; state; system; temperature; thermal; transition; triangles; triangulated; type; vol; yerevan
- versions: original; plain text
- ap-1346
- author: Bellucci, S.; Krivonos, S.; Sutulin, A.
- title: N = 4, d = 1 Supersymmetric Hyper-Kähler Sigma Models and Non-Abelian Monopole Background
- date: 2011-01-02
- words: 5674
- flesch: 66
- summary: Indeed, if we rewrite (3.7) as φ̇ = Bav̇a − f,a(λσaλ̄)+ f A, f,a ≡ ∂ ∂va f, (4.1) then the r.h.s. of (4.1) has to transform as a full time derivative under supersymmetry transforma- tions (2.15). The resulting action includes a wide class of N = 4 supersymmetric mechanics describing the motion of an isospin-carrying particle over spaces with non-trivial geometry.
- keywords: abelian; acta; action; aij; arxiv; auxiliary; background; bellucci; bosonic; case; components; coupling; dimensional; fermionic; fermions; flat; function; gauge; harmonic; hep; hyper; instanton; isospin; ivanov; kähler; krivonos; mechanics; models; non; nut; particle; phys; physical; polytechnica; potential; qiα; rev; sigma; spaces; superfield; supermultiplet; supersymmetric; taub; tensor; time; variables; vij; vol; |v|; η̄i
- versions: original; plain text
- ap-1348
- author: Bellucci, S.; Krivonos, S.; Sutulin, A.
- title: Five-dimensional N = 4 Supersymmetric Mechanics
- date: 2011-01-02
- words: 4250
- flesch: 64
- summary: Next, we introduce the standardPoissonbrackets for bosonic fields {π,Λ} =1, { π̄,Λ } =1, {pφ, φ} =1, (2.13) so that the generators of the transformations (2.11), 2We used the following definition of the superspace measure: d4θ ≡ − 1 96 DiaDibD bj Dja. 23 Acta Polytechnica Vol. (2.16) Performing a Routh transformation over the vari- ables (Λ,Λ, φ), we reduce the action (2.8) to S̃ = S − ∫ dt { π Λ̇+ π̄ Λ̇+ pφφ̇ } (2.17) and substitute the expressions (2.16) in S̃. At the final step, we have to choose the proper parametriza- tion for bosonic components qiαA (2.6), taking into account that they contain only five independent vari- ables.
- keywords: abelian; acta; action; arxiv; bellucci; bosonic; case; components; dimensional; fermionic; fields; form; general; group; hep; hypermultiplets; invariant; isospin; ivanov; krivonos; lechtenfeld; mechanics; monopole; motion; non; ordinary; phys; polytechnica; possible; qiαa; qiα̂a; reduction; rev; sector; su(2; superfields; superspace; supersymmetric; system; variables; vol; vαv̄β; yang
- versions: original; plain text
- ap-1350
- author: Castro, O. Osuna; Wagner, E.
- title: Quantum Moment Map and Invariant Integration Theory on Quantum Spaces
- date: 2011-01-02
- words: 2415
- flesch: 68
- summary: q2y, E � y =0, F � y = q1/2((1+ q−2)x − (1+ s)), K � x = x, E � x = q1/2y, F � x = q5/2y∗, K � y∗ = q−2y∗, E � y∗ = q−3/2((1+ q−2)x − (1+ s)), F � y∗ =0. 30 Acta Polytechnica Vol. Using the relations ke = q2ek, f k = q2kf, ef − f e = (q − q−1)−1(sk − k−1), (9) one easily proves that (8) defines a U-action on L+(D) turning it into a left U-module *-algebra.
- keywords: -algebra; action; approach; hilbert; integral; integration; invariant; l+(d; map; moment; operator; quantum; relations; representations; s(a; set; space; theoretic; theory; trace; xηn; yηn
- versions: original; plain text
- ap-1352
- author: Dimakis, A.; Kanning, N.; Müller-Hoissen, F.
- title: Bidifferential Calculus, Matrix SIT and Sine-Gordon Equations
- date: 2011-01-02
- words: 3319
- flesch: 77
- summary: =1, as follows, p = p0 − tr ( (SK + KS)ΞKΞ (IM +(KΞ) 2)−1 ) = p0 +tr ( (IM +(KΞ) 2)x (I M +(KΞ) 2)−1 ) x , (22) using (19) and the identity (detM)x =tr(M xM −1) detM for an invertiblematrix function M. q in (20) can be expressed as q =2tr ( SKΞ (IM +(KΞ) 2)−1 ) .
- keywords: algebra; a−1; bidifferential; calculus; consequence; equation; exact; gordon; graded; integrable; invertible; let; mat(m; mat(n; matrices; matrix; miura; phys; proposition; r2)−1; result; second; self; sine; sit; solutions; system; transformation
- versions: original; plain text
- ap-1354
- author: Kandirmaz, N.; Sever, R.
- title: Path Integral Solution of PT-/non-PT-Symmetric and non-Hermitian Hulthen Potential
- date: 2011-01-02
- words: 1743
- flesch: 81
- summary: 2 PT-Symmetric and Non-Hermitian Hulthen Potential The kernel of a point particle moving in the V (x) potential in one dimension is represented by the fol- lowing path integral K(xb, tb;xa, ta) = ∫ DxDp 2π · (1) exp{i ∫ dt[pẋ − p2 2m − V (x)]} where h̄ = 1. = 1 2 √ 2 √ n +1 √ 4(n +1) 2 − (λn − Kn) 2 · √ Γ(n +1)Γ(Kn + λn + n)
- keywords: energy; functions; hermitian; hulthen; integral; kernel; non; path; phys; potential; sever; sin2; spectrum; symmetric
- versions: original; plain text
- ap-1356
- author: Lanczewski, T.
- title: The Velocity Tensor and the Momentum Tensor
- date: 2011-01-02
- words: 2124
- flesch: 75
- summary: Keywords: relativistic classical mechanics, velocity tensor, momentum tensor. (11) the Galilean transformation in the form G(v)= ( 1 0 −v 1 ) and hence we get Π(v)= ( 1 0 v 1 )( Π00 Π 0 1 Π10 Π 1 1 )( 1 0 −v 1 ) = ( Π00 − vΠ 0 1 Π 0 1 Π10 + v ( Π00 −Π 1 1 ) − v2Π01 Π 1 1 + vΠ 0 1 ) , (12) where all elements Πμν in Eq.
- keywords: case; classical; constant; description; dimensional; dynamics; equation; form; general; matrix; mechanics; momentum; relativistic; tensor; time; velocity; β(π; π00; π01
- versions: original; plain text
- ap-1358
- author: Ferreira, L. A.; Kato, S.; Sawado, N.; Toda, K.
- title: Quantized Solitons in the Extended Skyrme-Faddeev Model
- date: 2011-01-02
- words: 1793
- flesch: 73
- summary: We have found new Hopf soliton solutions for the extended Skyrme- Faddeev model. We construct static soliton solutions carrying non- trivialHopf topological charges for afield theory that has found interesting applications in many areas of physics.
- keywords: energy; faddeev; field; hopf; lattice; model; phys; physics; rev; science; skyrme; solitons; solutions; su(2; theory; university; ∂iu
- versions: original; plain text
- ap-1360
- author: Fotopoulos, A.; Tsulaia, M.
- title: Current Exchanges for Reducible Higher Spin Modes on AdS
- date: 2011-01-02
- words: 2178
- flesch: 84
- summary: References [1] Vasiliev, M. A.: Fortsch. Phys. B 291, 141 (1987), Annals Phys. 177, 63 (1987), Vasiliev, M. A.: Phys.
- keywords: ads; arxiv; cubic; field; fronsdal; gauge; hep; higher; interaction; jhep; lagrangian; lett; modes; nucl; phys; rev; s(s; spin; tsulaia
- versions: original; plain text
- ap-1362
- author: Palese, M.; Winterroth, E.
- title: Infinitesimal Algebraic Skeletons for a (2 + 1)-dimensional Toda Type System
- date: 2011-01-02
- words: 3514
- flesch: 70
- summary: An algebraic skeleton on V is a triple (E, G, ρ), with G a (possibly infinite-dimensional) Lie group, E = V ⊕ g, g the Lie algebra of G, and ρ a repre- sentation of G on E (infinitesimally of g on E) such that ρ(g)x = Ad(g)x, for g ∈ G, x ∈ g. Let Z be a manifold of type V (i.e. ∀z ∈ Z, TzZ � V ). Keywords: Toda type system, integrability, infinitesimal skeleton, tower, Cartan connection.
- keywords: absolute; algebra; algebraic; cartan; connection; conservation; continuous; different; dimensional; equations; forms; group; infinitesimal; integrability; l(ξ; laws; lie; math; nonlinear; parallelism; particular; phys; problem; prolongation; p̄(ξ; representation; skeleton; structure; symmetries; system; terms; toda; tower; type; ∧dz
- versions: original; plain text
- ap-1364
- author: Poghosyan, V. S.; Priezzhev, V. B.
- title: The Problem of Predecessors on Spanning Trees
- date: 2011-01-02
- words: 2905
- flesch: 74
- summary: The known equivalence between the loop erased random walk (LERW) and the directed path on the spanning tree states that P(1) is the probability for the LERW started at i to reach the neighboring site j. 51 No. 1/2011 The Problem of Predecessors on Spanning Trees V. S. Poghosyan, V. B. Priezzhev Abstract We consider the equiprobable distribution of spanning trees on the square lattice.
- keywords: fixed; large; lattice; lerw; lett; loop; model; nearest; p(1; p(r; path; phys; predecessors; priezzhev; probability; problem; random; rev; ruelle; set; site; spanning; square; stat; tree; vertex; walk
- versions: original; plain text
- ap-1366
- author: Schulze-Halberg, A.
- title: Propagators of Generalized Schrödinger Equations Related by First-order Supersymmetry
- date: 2011-01-02
- words: 3608
- flesch: 73
- summary: 51 No. 1/2011 Propagators of Generalized Schrödinger Equations Related by First-order Supersymmetry A. Schulze-Halberg Abstract Weconstruct an explicit relation betweenpropagators of generalized Schrödinger equations that are linkedbyafirst-order supersymmetric transformation. We re- strict ourselves to first-order SUSY transformations of generalized Schrödinger equations, a brief review of which and of related theory is given in section 2.
- keywords: boundary; case; discrete; dψ0,x; equation; e→e0; f(y)h(y; function; generalized; green; k0(x; k1(x; lim; means; note; problem; propagators; relation; solutions; spectrum; susy; value; vol; ψ0(y; ∣∣∣∣∣
- versions: original; plain text
- ap-1368
- author: Shilin, I. A.; Nizhnikov, A. I.
- title: Some Formulas for Legendre Functions Induced by the Poisson Transform
- date: 2011-01-02
- words: 2029
- flesch: 89
- summary: mn−2 ≥ 0, K = (k0, k1, . . . ,0,sinhα) and put K = (0, . .
- keywords: cone; formulas; functions; group; i=1; moscow; subgroup; transform; vol
- versions: original; plain text
- ap-1370
- author: Takasaki, K.
- title: Toda Tau Functions with Quantum Torus Symmetries
- date: 2011-01-02
- words: 1465
- flesch: 74
- summary: Keywords: Toda hierarchy, melting crystal model, quantum torus algebra. Toda hierarchy [5] is given by τ(s, T , T̄)= 〈s|exp ( ∞∑ k=1 TkJk ) gexp ( − ∞∑ k=1 T̄kJ−k ) |s〉, (10) where T =(T1, T2, · · ·) and T̄ =(T̄1, T̄2, · · ·) are time variables of the Toda hierarchy, 〈s| and |s〉 are the ground states 〈s| = 〈−∞| · · · ψ∗s−1ψ ∗ s , |s〉 = ψ−sψ−s+1 · · · | − ∞〉 in the charge-s sector of the Fock space, and g is an element of GL(∞)= exp ( gl(∞) ) .
- keywords: algebra; exp; function; hierarchy; k)m; k=1; math; model; quantum; relations; shift; symmetries; takasaki; tau; toda; torus; τ(s
- versions: original; plain text
- ap-1372
- author: Catto, S.; Choun, Y.
- title: Supersymmetry in the Quark-Diquark and the Baryon-Meson Systems
- date: 2011-01-02
- words: 2551
- flesch: 74
- summary: In the above equation n∑ n=0 (−1)n(nr −1)!(nr + l − 12)! The diagonal pieces are bilocal fields representing color singlet 1+35 mesons and 1+35+405 exotic mesons, respectively, with respect to the subgroup SU(3)c × SU(6) of the algebra.
- keywords: antidiquark; catto; color; components; dab; dimensional; fields; function; mass; mesons; new; quark; representation; respect; scalar; su(3)c; su(6/1; supergroup; supersymmetry; system; york
- versions: original; plain text
- ap-1374
- author: Ficker, T.; Martišek, D.; Jennings, H. M.
- title: Surface Roughness and Porosity of Hydrated Cement Pastes
- date: 2011-01-03
- words: 5186
- flesch: 50
- summary: In our preliminary study [9], it was illustrated that, in addition to the roughness numbers RN, there are very promising surface parameters of another kind called the sur- face profile (SP) and surface roughness (SR) pa- rameters derived from three-dimensional (3D) dig- ital replicas of fracture surfaces. RN numbers quan- tify the increase in the area of fracture surfaces, i.e. they are overall area characteristics, whereas SP/SR parameters evaluate surface irregularities, i.e. they quantify height differences on fracture reliefs.
- keywords: 20×; acta; behavior; cement; cement ratio; components; dependents; different; f(xi; fig; figure; fracture; fracture surfaces; function; graphs; hydrated; irregularities; irregularity; larger; length; linear; magnification; materials; parameters; pastes; polytechnica; porosity; profile; profile parameters; quantities; ratio; ratio r; results; roughness; roughness parameters; scales; source; spa; spc; specimens; spp; spq; spv; spz; sra; srp; srq; srv; statistical; surface; values; vol; water
- versions: original; plain text
- ap-1376
- author: Ficker, T.
- title: Fracture Surfaces of Porous Materials
- date: 2011-01-03
- words: 2126
- flesch: 56
- summary: [4] Lange,D.A., Jennings,H.M., Shah,S.P.: Rela- tionship between fracture surface roughness and fracture behavior of cement paste and mortar, J. Am. Keywords: roughness analysis, fracture surfaces, cement-based materials, confocal microscopy.
- keywords: analysis; behavior; capillary; cement; dependence; figure; fracture; function; graphs; ha(p; height; irregularities; jennings; lange; linear; materials; pastes; porosities; porosity; profile; roughness; shah; small; specimens; surfaces; value
- versions: original; plain text
- ap-1378
- author: Hilar, M.
- title: 3D Modelling of a Tunnel Re-excavation in Soft Ground
- date: 2011-01-03
- words: 3239
- flesch: 53
- summary: The model was prepared for analysing the conditions input into the 2D calcu- lations (location of geotechnical units, input param- eters, tunnel lining, etc.) 51 No. 3/2011 Fig. 11: Tunnel construction under micropile umbrellas the horizontal jet grouting columns (to increase their stiffness), but like the jet grouting columns drilled into the face, this approach was finished after the third section.
- keywords: acta; area; bench; calculations; collapsed; concrete; conditions; construction; excavation; face; figure; ground; heading; invert; lining; measures; method; modelling; monitoring; parameters; pile; pile walls; polytechnica; pre; primary; results; sprayed; stability; support; tunnel; tunnel lining; vault; vol; walls
- versions: original; plain text
- ap-1380
- author: Kutílek, P.; Hozman, J.
- title: Determining the Position of Head and Shoulders in Neurological Practice with the use of Cameras
- date: 2011-01-03
- words: 3492
- flesch: 53
- summary: In our recent method for studying only head po- sition [5], two cameras are required for determining head positions. The reason for this is the large devia- tion of head position from the optimum location in the middle distance between the two cameras, which causes large differences in the distances between the CCD sensors (cameras) and the measured head and shoulders.
- keywords: acta; anatomical; angle; arcsin; axes; axis; cameras; ccd; clinical; const; coordinates; correction; displacement; distance; fig; flexion; head; image; inclination; left; measured; measurement; method; mutual; neurological; optical; polytechnica; position; posture; practice; profile; right; rotation; sensors; shoulders; software; system; technique; tragus; use; vol
- versions: original; plain text
- ap-1382
- author: Litecká, J.; Fabianová, J.; Pavlenko, S.
- title: Relation between Cutting Surface Quality and Alloying Element Contents when Using a CO2 Laser
- date: 2011-01-03
- words: 2629
- flesch: 59
- summary: The experimental results are shown in graphs which illustrate the suitability of materials for achieving required cutting surface quality parameters. 51 No. 3/2011 3 Description of the experiment The following materials were chosen for an exper- iment to determine the quality characteristics of material cutting using a CO2 laser with different structures, i.e. with different alloys: S355J2C+N, QStE380TM and S2355JR.
- keywords: acta; chemical; cutting; experiment; fig; figure; gas; high; iso; kosice; laser; lower; material; measured; measurement; mechanical; microhardness; parameters; polytechnica; prešov; properties; quality; results; roughness; s355j2c+n; sample; speed; steel; surface; table; value; vickers; vol
- versions: original; plain text
- ap-1384
- author: Stefanovič, M.; Vrbová, M.
- title: Optimization of a Water Window Capillary Discharge Radiation Source
- date: 2011-01-03
- words: 3267
- flesch: 57
- summary: Keywords: water window radiation, capillary discharge, soft X rays, nitrogen plasma. Capillary pinching discharge as water window radiation source.
- keywords: absorption; capillary; channel; code; current; density; discharge; distribution; electric; electrodes; electron; field; figure; filling; gas; geometry; group; high; initial; ions; line; maximum; nitrogen; output; parameters; plasma; power; pressure; radial; radiation; radius; shielded; source; spectral; temperature; time; water; window
- versions: original; plain text
- ap-1386
- author: Vaněček, D.; Jirsa, J.
- title: Electronic Education
- date: 2011-01-03
- words: 4610
- flesch: 58
- summary: Keywords: e-learning, LMS, computer animation. We will fo- cus on computer animations, which are discussed in greater detail in the second and third parts of this paper.
- keywords: acta; adobe; animation; available; basic; browser; classical; computer; content; course; development; e.g.; education; electronic; elements; features; file; flash; frames; graphic; idea; information; interactive; internet; knowledge; lcms; learning; lms; media; multimedia; necessary; need; new; paper; parts; pictures; polytechnica; principle; screenshots; second; size; software; speed; students; study; suitable; support; systems; teacher; teaching; technical; technologies; technology; time; use; user; vividness; vol; way; web; wink
- versions: original; plain text
- ap-1388
- author: Vaněček, D.; Jirsa, J.
- title: A Taxonomy of Technical Animation
- date: 2011-01-03
- words: 1514
- flesch: 47
- summary: Our aim is to show the taxonomy of education animation. This article deals with computer animation in technical education.
- keywords: acta; animation; computer; didactic; dimensional; education; example; fig; figure; heat; model; motivational; polytechnica; praha; presentation; process; simulation; specific; stroke; student; taxonomy; technology; topic; vaněček; vol
- versions: original; plain text
- ap-1390
- author: Vaněček, D.; Jirsa, J.
- title: Practical Implementation of Animation for Students of Pedagogical Studies at MIAS CTU in Prague
- date: 2011-01-03
- words: 2936
- flesch: 59
- summary: ap-3-11.dvi Acta Polytechnica Vol. 51 No. 3/2011 Practical Implementation of Animation for Students of Pedagogical Studies at MIAS CTU in Prague D. Vaněček, J. Jirsa Abstract This paper shows computer animation as a teaching and learning instrument in technical education. Our aim is to show good practice in creating computer animations.
- keywords: acta; adobe; animated; animation; approach; appropriate; cabin; computer; concept; educational; figure; flash; following; implementation; individual; internet; layers; learning; line; necessary; order; paper; piloting; polytechnica; product; rotor; school; simple; specific; stage; students; symbols; technical; testing; topic; type; use; vol
- versions: original; plain text
- ap-1392
- author: Amore, P.; Fernández, F. M.
- title: Rational Approximation to the Solutions of Two-Point Boundary Value Problems
- date: 2011-01-04
- words: 3189
- flesch: 79
- summary: Keywords: nonlinear differential equations, Ginzburg-Landau, Wilson’s renormalization, Wegner-Houghton, Riccati equation, Padé-Hankel method. The purpose of this paper is to investigate whether a kind of Padé-Hankel method may be use- ful for two-point boundary value problems given by nonlinear ordinary differential equations.
- keywords: approach; boundary; coefficients; convergence; differential; equation; fernández; hankel; method; phys; point; problems; references; sequences; series; solution; table; value; −0.461; −1.588
- versions: original; plain text
- ap-1394
- author: Brody, D. C.; Graefe, E. M.
- title: Coquaternionic Quantum Dynamics for Two-level Systems
- date: 2011-01-04
- words: 4264
- flesch: 68
- summary: For this purpose, let us write i = 1 ν (iu2 + ju4 + ku5), (12) where ν = √ u22 − u24 − u25 if u24 + u25 < By differentiating σl in t for each l and using the dynamical equation (14), we deduce, after rearrange- ments of terms, the following set of generalised Bloch equations: 1 2 σ̇1 = νσ3 − u3 ν (u2σ2 + u4σ4 + u5σ5) 1 2 σ̇2 = 1 ν (u2u3σ1 − u1u2σ3 + u0u5σ4 − u0u4σ5) 1 2 σ̇3 = −νσ1 + u1 ν (u2σ2 + u4σ4 + u5σ5) (16) 1 2 σ̇4 = 1 ν (−u3u4σ1 + u0u5σ2 + u1u4σ3 + u0u2σ5) 1 2 σ̇5 = 1 ν (−u3u5σ1 − u0u4σ2 + u1u5σ3 − u0u2σ4), where we have assumed u24 + u 2 5 < u 2 2 so that ν =√ u22 − u24 − u25.
- keywords: acta; complex; conjugate; coquaternionic; dynamical; dynamics; eigenvalues; energy; equations; evolution; form; hamiltonian; hermitian; hyperbolic; imaginary; mechanics; open; orbits; phys; polytechnica; q22; q23; quantum; real; reduced; space; state; state space; symmetric; system; time; u22; u24; u25; unitary; use; variables
- versions: original; plain text
- ap-1396
- author: Jones, H. F.
- title: Perturbation Theory for PT-Symmetric Sinusoidal Optical Lattices at the Symmetry-Breaking Threshold
- date: 2011-01-04
- words: 3108
- flesch: 74
- summary: 2(k0 + 1 2kB )√ (w2 + 4iz) (14) η2 = kB z − x + 12iw 2(k0 + 1 2kB )√ (w2 + 4iz) . In that case, as long as w2 � 4z the arguments may be treated as effectively real, and each error function behaves like a sign function of its argument (see Figure 2(a)), so that the sum of the two behaves like the step func- tion θ(kB z − |x|).
- keywords: 4iz; amplitude; behaviour; case; equation; error; form; functions; jordan; large; lett; linear; order; perturbation; phys; propagation; ref; rev; second; theory; wave
- versions: original; plain text
- ap-1398
- author: Kalina, M.
- title: Two Remarks to Bifullness of Centers of Archimedean Atomic Lattice Effect Algebras
- date: 2011-01-04
- words: 4722
- flesch: 85
- summary: such that i �= j. � � �� � � � � � � � � � � p1 p2 p3 p4 p5 p6 pn pn+1 � � �� � � � � � � � � � � a0 b0 a1 b1 a2 b2 an bn � � � � � � � � � � � � � � � � c1 c2 c3 cn−1 d1 d2 d3 dn−1 Fig. For κ ∈ E we get complete atomic Boolean algebras B̃κ generated by sets of atoms Ãκ = ⋃ i∈J {pi} ∪ {aκ, bκ} ∪ ⋃ i ∈ J i > κ {ai, bi}.
- keywords: algebra; archimedean; atomic; atoms; bifull; boolean; c(e; center; complete; effect; elements; exists; lattice; orthomodular; riečanová; s(e; set; sets; sublattice
- versions: original; plain text
- ap-1400
- author: Kirillov, O. N.
- title: Singularities in Structural Optimization of the Ziegler Pendulum
- date: 2011-01-04
- words: 6455
- flesch: 60
- summary: The proof of optimality in non-conservative optimization problems is a mathematical challenge related to multiple eigenvalues, singularities in the stability domain, and non-convexity of the merit functional. This phenomenon has been observed in many numerical studies of non-conservative optimization problems [4, 6, 7, 9, 10, 13, 14, 17, 18] and was described analytically by Kirillov and Seyranian in [27, 28].
- keywords: acta; beck; boundary; case; coefficients; column; conservative; corresponds; critical; critical flutter; critical load; damping; design; divergence; eigenvalues; equation; extrema; figure; finite; flutter; flutter load; follower; free; function; increase; journal; kirillov; link; load; local; mass; masses; maximum; non; optimal; optimization; pendulum; point; polytechnica; problems; singularities; stability; stiffness; structural; surface; systems; umbrella; undamped; vertical; vibration; vol; whitney; ziegler
- versions: original; plain text
- ap-1402
- author: Kisil, V. V.
- title: Erlangen Programme at Large 3.2 Ladder Operators in Hypercomplex Mechanics
- date: 2011-01-04
- words: 6037
- flesch: 69
- summary: Then there is an additional pair of hyperbolic ladder operators, which are identical (up to factors) to (26): L±j = X̃ ∓ jỸ = jq ± jh d dq . 51 No. 4/2011 Table 1: The action of hyperbolic ladder operators on a 2D lattice of eigenspaces.
- keywords: acta; action; algebra; case; classical; clifford; corresponding; double; dq2; dual; eigenvalues; eigenvectors; elliptic; equations; following; form; fsb; functions; group; hamiltonian; harmonic; heisenberg; hyperbolic; hypercomplex; kisil; ladder; ladder operators; lie; linear; l±h; mathematical; mechanics; non; numbers; operators; oscillator; parabolic; phase; polytechnica; principle; quantum; representation; respective; shale; similarity; sp(2; sp2; space; subgroups; symplectic; s̃p(2; theory; vol; weil; z̃/2; ρswh̄
- versions: original; plain text
- ap-1404
- author: Kotvytskiy, A. T.; Kruchkov, D. V.
- title: Dynamical Symmetry Breaking in RN Quantum Gravity
- date: 2011-01-04
- words: 2952
- flesch: 69
- summary: Thus, we obtain the final form of the second vari- ation δ(2)Sg = 1 2M2 ∫ d4x ( √ −g · ( N RN−1h2 + 1 2 N (N − 1)RN−2h21 ) − N 2 √ −g hμν K μν RN−1h1 − (25) hμν hαβ F μναβ 2 √ −g RN − (hμν K μν )2 8 √ −g3 RN ) . Rμν � 1 2 ( ημν − hμν + hμρhνρ ) × (13)( ∂α∂μh α ν − ∂α∂ αhμν − ∂μ∂ν h
- keywords: action; background; breaking; case; corrections; dynamical; dyson; effect; equations; exact; field; flat; following; formalism; gravitational; gravity; hμν; metric; model; order; phys; propagator; quantum; schwinger; second; shil’nov; space; symmetry; time
- versions: original; plain text
- ap-1406
- author: Masáková, Z.; Pelantová, E.
- title: Ito-Sadahiro numbers vs. Parry numbers
- date: 2011-01-04
- words: 4310
- flesch: 79
- summary: Keywords: numeration systems, negative base, Pisot number, Parry number. 51 No. 4/2011 Ito-Sadahiro numbers vs. Parry numbers Z. Masáková, E. Pelantová
- keywords: acta; algebraic; base; coefficients; conjugates; d−β; expansions; form; i=0; infinite; integer; ito; minimal; negative; number; numeration; parry; periodic; perron; pisot; polynomial; proof; properties; q(β; real; sadahiro; set; system; theorem; word
- versions: original; plain text
- ap-1408
- author: Paseka, J.; Janda, J.
- title: More on PT-Symmetry in (Generalized) Effect Algebras and Partial Groups
- date: 2011-01-04
- words: 6796
- flesch: 85
- summary: In such a case the set E(H) of effects is the set of all self-adjoint operators A on a Hilbert space H between the null operator 0 and the identity operator 1 and endowed with the partial operation + defined iff A + B is in E(H), where + is the usual operator sum. if A + B is unbounded and (D(A)= D(B) or one out of A, B is bounded) , (A + B)b if A + B is bounded and D(A)= D(B), undefined otherwise and ≤ be a relation on Gr(H) defined for A, B ∈ Gr(H) by A ≤ B iff there is a positive linear operator C ∈ Gr(H) such that B =
- keywords: algebra; b)b; cases; commutative; complex; d(a; d(b; d(c; dimensional; effect; following; generalized; gr(h; grd; group; hermitian; hilbert; infinite; linear; operator; partial; positive; set; sgr(h; space; theorem; unbounded; wop
- versions: original; plain text
- ap-1410
- author: Riečanová, Z.; Zajac, M.
- title: Extensions of Effect Algebra Operations
- date: 2011-01-04
- words: 4335
- flesch: 81
- summary: ∈ E and partial binary op- eration ⊕ satisfying for any x, y, z ∈ E the conditions (GE1) x ⊕ y = y ⊕ x if one side is defined, (GE2) (x ⊕ y) ⊕ z = x ⊕ (y ⊕ z) if one side is defined, (GE3) We say that the operation ⊕2 extends ⊕1 (written ⊕1 ⊂ ⊕2) if for any a, b ∈ E the existence of a ⊕1 b implies that a ⊕2 b exists and a ⊕2 b =
- keywords: algebra; d(a; d(h; definition; effect; generalized; hilbert; linear; operators; partial; set; space; sub; sum; v(h
- versions: original; plain text
- ap-1412
- author: Riečanová, Z.
- title: Effect Algebras of Positive Self-adjoint Operators Densely Defined on Hilbert Spaces
- date: 2011-01-04
- words: 3539
- flesch: 76
- summary: Moreover, A⊕B (for A, B ∈ V(H)) and A ⊕S B (for A, B ∈ Sp(H)) coincide with the usual sum of operators A, B when at least one of them is bounded. An operator A : D(A) → H is called closed if for every sequence (xn)n∈N, xn ∈ D(A), such that xn → x ∈ H and Axn → y ∈ H as n → ∞ one has x ∈ D(A) and Ax = y. Since A ∈ V(H) is positive and hence also symmetric (see [3], p. 142) there exists a closed operator
- keywords: adjoint; algebra; d(a; effect; exists; generalized; hilbert; linear; operation; operators; partial; positive; self; sp(h; space; theorem; unbounded; usual; v(h
- versions: original; plain text
- ap-1414
- author: Rivers, R. J.
- title: Path Integrals for (Complex) Classical and Quantum Mechanics
- date: 2011-01-04
- words: 4818
- flesch: 72
- summary: For reasons that will rapidly become clear, we shall initially restrict ourselves to Hermitian Hamil- tonians, even though part of the original motivation for considering complex phase space was to accom- modate pseudo-Hermitian Hamiltonians which, by virtue of PT-symmetry, had real spectra. 51 No. 4/2011 4 Complex Classical Mechanics (CCM) We now consider complex phase space, repeating the analysis of Smilga
- keywords: acta; behaviour; bender; ccm; classical; classical mechanics; complex; dimensions; energy; extended; formalism; gozzi; hamiltonian; hcl(ϕ; integral; lett; mechanics; mfqm; o(h̄; particle; path; phase; phase space; phys; polytechnica; quantum; quantum mechanics; quasi; real; similarities; solutions; space; systems; time; trajectories; tunnelling; variables; vol
- versions: original; plain text
- ap-1416
- author: Shapiro, B.; Tater, M.
- title: Polynomial Solutions of the Heun Equation
- date: 2011-01-04
- words: 2452
- flesch: 71
- summary: Given a pair of polynomials {Q, P } and a positive integer n find all polynomials V such that (1) has a polynomial solution S of degree n. Polynomials V are referred to as Van Vleck poly- nomials and polynomials S as Stieltjes polynomials. Figure 3 suggests that the asymptotic root distribution of Van Vleck polynomials has a more complicated structure than before.
- keywords: asymptotic; case; corresponding; distribution; equation; heun; measure; polynomials; results; roots; sequence; shapiro; spectral; stieltjes; support; van; vleck; zeros
- versions: original; plain text
- ap-1418
- author: Wunner, G.; Cartarius, H.; Koeberle, P.; Main, J.; Rau, S.
- title: Exceptional Points for Nonlinear Schroedinger Equations Describing Bose-Einstein Condensates of Ultracold Atomic Gases
- date: 2011-01-04
- words: 4239
- flesch: 59
- summary: 2π, with radius r = 10−8 is per- formed around the critical scattering length N2a/au = −3π/8. From (3) it can be seen that these solutions only exist for N2a/au ≥ −3π/8. Accurate numerical stationary solutions of (1) can be determined by direct outward integration start- ing with suitable initial conditions at r = 0
- keywords: acta; atoms; bifurcation; bose; chemical; circle; complex; condensates; critical; dipole; einstein; energy; equation; exceptional; field; figure; functions; gaussian; gross; interaction; length; long; main; mean; permutation; phys; pitaevskii; point; polytechnica; potential; radius; range; results; rev; scattering; solutions; state; stationary; values; variational; vol; wave
- versions: original; plain text
- ap-1420
- author: Znojil, M.
- title: The Horizons of Observability in PT-symmetric Four-site Quantum Lattices
- date: 2011-01-04
- words: 5887
- flesch: 70
- summary: One of the bound- aries (viz., the doublet of hyperbolas W (a, 0, c) = 0) describes in fact a sign-non-changing (i.e., the reality- of-energies non-changing) curve of the doubly degen- erate (and, hence, irrelevant and removable) zeros of the function W (a, 0, c) = (8 + c2 − a2)2. This recipe generates the two auxiliary roots 4 s = 4 s(±) = 20 − 2 a2 − 2 c2 − 4 b2 ± 2 √ W (a, b, c) where we already know the function of Eq.
- keywords: acta; attention; auxiliary; boundaries; boundary; case; circle; circular; connected; coupling; curves; d(h; d(p; decrease; domain; dynamical; elementary; energies; fact; figure; form; general; h(s; hamiltonian; hilbert; interior; lattice; line; math; mathematical; mechanics; model; new; non; phys; physical; polytechnica; present; q(a; quantum; real; ref; refs; site; small; space; spectra; straight; strong; symmetric; theor; vol; znojil
- versions: original; plain text
- ap-1422
- author: Bartošek, J.
- title: A Pitch Detection Algorithm for Continuous Speech Signals Using Viterbi Traceback with Temporal Forgetting
- date: 2011-01-05
- words: 3181
- flesch: 64
- summary: Secondly, temporal forgetting is applied in order to avoid penalizing pitch jumps after prosodic pauses of one speaker or changes in pitch connected with turn-taking in dialogs. This is the lowest frequency on which the signal is periodic, and we sense this frequency as the height (pitch) of the sound.
- keywords: acta; algorithm; best; candidate; cents; detection; difference; domain; er[n; errors; forgetting; frame; frequency; function; fundamental; geh; gross; higher; lower; methods; mnbfcv2; mnfbc; pda; pitch; polytechnica; precision; probability; procedure; processing; prosodic; range; rate; results; signal; speech; table; temporal; threshold; time; transition; unvoiced; viterbi; vol; xw2
- versions: original; plain text
- ap-1424
- author: Brejcha, M.
- title: A Wideband Low-Pass Filter for Differential Mode Distortion
- date: 2011-01-05
- words: 2061
- flesch: 65
- summary: Keywords: filter, filtering, low-pass, wideband, EMC, differential mode. Ordinary filters are usually proposed for filtering the distortion from 150 kHz to 30 MHz.
- keywords: attenuation; band; capacitors; circuit; converter; corrective; fig; figure; filter; frequency; impedance; inductance; inductor; khz; low; mhz; parameters; parasitic; parts; resonant; section; switching; values
- versions: original; plain text
- ap-1426
- author: Brueser, Ch.
- title: Unobtrusive Non-Contact Detection of Arrhythmias using a “Smart” Bed
- date: 2011-01-05
- words: 3415
- flesch: 57
- summary: Our work prepares the way for future research on fully automatic algorithms for detecting arrhyth- mias in BCG signals. [5] Kortelainen, J. M., Virkkala, J.: FFT averaging of multichannel BCG signals from bed mattress sensor to improve estimation of heart beat in- terval, Proc.
- keywords: aachen; acta; activity; arrhythmias; atrial; bcg; bed; cardiac; cardiopulmonary; cardioversion; clinical; ecg; electromechanical; emfi; estimation; estimators; fibrillation; figure; frequency; germany; heart; hospital; ieee; lines; long; mattress; measurement; monitoring; non; normal; order; patients; peaks; polytechnica; psd; rate; reference; sensor; signal; sinus; spectral; spectrograms; study; subject; system; time; university; unobtrusive; vol
- versions: original; plain text
- ap-1428
- author: Černý, V.
- title: Topology Control with Anisotropic and Sector Turning Antennas in Ad-hoc and Sensor Networks
- date: 2011-01-05
- words: 4686
- flesch: 59
- summary: Keywords: ad-hoc network simulation, interference, antenna radiation patterns,mobile network simulation, Omnet++, topology control, interference, sector antennas, rotating antennas, wireless networks, anisotropic antennas, sensor net- works. Pmin execute: • exchange NT tables with neighbours; • test connectivity with neighbours through intermediate nodes (acting as relays); • if no nodes missing P = P −ΔPmin; • else P = P +ΔPmin and end while cycle.
- keywords: acta; algorithms; anisotropic; antenna; case; cluster; condition; connectivity; control; dbi; dbm; distribution; example; execute; fig; figure; gain; graph; imin; interference; level; lobe; model; neighbours; network; nodes; number; parameters; pattern; pmax; pmin; polytechnica; power; radiation; radio; receiver; rmin; sector; sta; step; topology; total; transmitter; turning; uniform; vol; δθmin
- versions: original; plain text
- ap-1430
- author: Drnek, K.
- title: Prague’s Water Supply Station in Podolí — a Solution for the Problems of Clean Water in the 1930s
- date: 2011-01-05
- words: 3144
- flesch: 72
- summary: His answer to the growing needs for more water was to build dual water pipelines to Prague, and to build more water plants to collect more water. Water supply plant inPodoĺı and Antońın Engel.
- keywords: building; city; clean; day; degree; engel; fig; filters; filtration; fine; floor; height; káraný; large; mesh; new; pipelines; plant; podoĺı; prague; prefilters; river; source; space; supply; system; vancl; vltava; vol; water; water plant; water supply
- versions: original; plain text
- ap-1432
- author: Faltin, P.; Chaisaowong, K.
- title: 3D Surface-based Detection of Pleural Thickenings
- date: 2011-01-05
- words: 2802
- flesch: 59
- summary: To evaluate the results, we measure both the totally de- tected volume of all thickenings, and the number of detected thickenings, for each patient. Fig. 7: Totally detected thickening volume depending on the size of the sliding convex hull Fig. 8: Detected number of thickenings depending on the size of the sliding convex hull 5 Discussion Neither an exactnumber of thickeningsnor the thick- ening volume could be determined because of the inter- and intra-reader variances.
- keywords: aachen; anatomical; computer; convex; data; detection; diagnosis; different; erosion; fig; figure; germany; healthy; hull; image; institute; level; lung; mask; model; number; pleural; results; rwth; segments; slice; step; structures; surface; thickenings; university; vol; volume
- versions: original; plain text
- ap-1434
- author: Ficker, T.
- title: Surface Morphology of Porous Cementitious Materials Subjected to Fast Dynamic Fractures
- date: 2011-01-05
- words: 1057
- flesch: 49
- summary: References [1] Ficker,T.,Martǐsek,D., Jennings,H.M.: Rough- ness of fracture surfaces andcompressive strength of hydrated cement pastes, Cem. [3] Ficker, T.: Fracture surfaces of porous materials, Acta Polytechnica 51(2011), no. 3, 21–24.
- keywords: cement; confocal; dimensional; dynamic; ficker; figure; fracture; height; hydrated; irregularities; materials; pastes; porous; profile; specimens; static; strength; surface
- versions: original; plain text
- ap-1436
- author: Gruenwald, O.
- title: Introduction to Modeling of Buying Decisions
- date: 2011-01-05
- words: 5043
- flesch: 53
- summary: The Kano model makes it possible to divide customer needs into a mandatory category, a one- dimensional category and an attractive category of requirements. The fourth type of question will evoke requirements that are already known, and consumers are aware about their expec- tations, but they have yet not been obtained in the product.
- keywords: acta; analysis; approach; attractive; buying; categories; category; choice; class; coefficient; conjoint; current; customer; decision; degree; dimensional; dominant; factors; importance; information; interview; kano; level; marketing; model; modeling; needs; number; opportunities; order; performance; polytechnica; process; product; purchasing; question; questionnaire; related; requirements; respondents; responses; result; satisfaction; satisfied; second; specific; students; study; survey; system; theory; type; university; use; vol
- versions: original; plain text
- ap-1438
- author: Hekrdla, M.
- title: Numerically Optimized Uniformly Most Powerful Alphabets for Hierarchical-Decode-and-Forward Two-Way Relaying
- date: 2011-01-05
- words: 3141
- flesch: 50
- summary: Table 1: Numerically optimized UMP alphabets Md Ns δ 2 min, not UMP δ 2 min, AA = AB δ 2 min, AA �= AB 2†) 1 4 4 4 4 1‡) 2 0.4 0.68 4†) 2 2.6 2 2.18 4 3 2.6 2.6 2.6 Alphabets † have the identical spectral efficiency r = log2 Md Ns = 1, where the extra dimensional- ity is taken as extra time-slots and a fair mutual comparison by minimal Euclidean distance can be made; here we need to reflect that the modulation should have the same mean symbol energy per time- slot (i.e. with the same mean power), thus in fact the case (Md = 4, Ns = 2, AA = AB), called a 4ary 2D-UMP alphabet, has δ2min = 4, which is directly equal to BPSK, and the alphabet (Md = 4, Ns = 2, AA �= AB), called a 4ary unequal 2D- UMP alphabet, then has δ2min = 4.36, which is bet- ter by 10log10 4.36 4 � 0.37dB than BPSK, see its hierarchical minimal distance in Figure 2 and the error performance comparison in Fig. In contrast to [9], whereUMP frequency-modulation alphabets have been designed, we face a problem of general UMP alphabet design with a natural unit mean symbol energy constraint, ε̄ = 1 Md Md−1∑ i=0 ||si||2.
- keywords: 4ary; alphabets; case; channel; coding; condition; data; decode; design; dimensional; distance; error; exclusive; fading; fig; forward; hdf; hierarchical; k=10db; linear; minimal; modulation; multi; network; optimization; parametrization; performance; problem; quaternary; rayleigh; relay; rice; rician; stage; strategy; symbol; terminals; ump; unequal; vol; way; wireless; zmd; δ2min
- versions: original; plain text
- ap-1440
- author: Krejčí, R.
- title: PhpHMM Tool for Generating Speech Recogniser Source Codes Using Web Technologies
- date: 2011-01-05
- words: 2535
- flesch: 60
- summary: About the author Robert Krejč́ı deals with digital signal processing and speech recognition focusing on optimisation of speech recogniser algorithms for systemswith limited hardware resources. For this purpose, the Speech Pro- cessing Group at the Department of Circuit Theory, CTU in Prague has been developing a “phpHMM” tool that facilitates and integrates the development of speech recognition algorithms to alternative hard- ware platforms.
- keywords: 0.000000e+00; 0.000000e+00 0.000000e+00; acta; algorithms; calculation; code; data; database; fig; file; hardware; input; language; methods; model; optimisation; output; parametrisation; phphmm; platform; polytechnica; processing; recogniser; recognition; results; server; signal; source; speech; speech recogniser; structures; text; time; tool; use; vol; web; words
- versions: original; plain text
- ap-1442
- author: Kříž, R.
- title: Chaos in GDP
- date: 2011-01-05
- words: 2570
- flesch: 63
- summary: Hurst exponent H is directly related to fractal di- mension D, because the maximum fractal dimension for a planar tracing is 2: D + H =2 (8) 2.4 Correlation dimension Correlationdimension (DC) describes thedimension- ality of the underlying process in relation to its ge- ometrical reconstruction in phase space. [9] Alligood, T. K., Sauer, D. T., Yorke, J. A.: CHAOS an introduction to dynamical systems. Springer, 2000.
- keywords: analysis; calculated; chaos; chaotic; correlation; data; deterministic; dimension; discrete; dynamical; economics; equation; exponent; fig; figure; fractal; function; gdp; gross; hurst; lyapunov; nonlinear; paper; phase; polytechnica; process; product; range; rescaled; series; set; space; system; time; trend; value; vol
- versions: original; plain text
- ap-1444
- author: Kunkemoeller, M.; Dietrich, P.; Pollow, M.
- title: Synthesis of Room Impulse Responses for Variable Source Characteristics
- date: 2011-01-05
- words: 3193
- flesch: 53
- summary: Room acoustic measurements nowadays only account for omnidirectional source characteristics. This motivates a measurement method that is capable of obtaining room impulse responses for these specific radiation patterns by using a superposition approach of several measurements with technically well-defined sound sources.
- keywords: aachen; acoustics; acta; angle; array; chassis; complex; domain; error; fig; figure; frequency; harmonics; impulse; institute; inverse; linear; loudspeaker; measurement; method; order; pattern; polytechnica; radiation; reference; representation; responses; results; room; setup; signal; single; sound; source; spherical; superposition; synthesis; target; technical; time; variances; vol; γ̂t
- versions: original; plain text
- ap-1446
- author: Obreja, R.; Edu, I. R.
- title: Limited Angle Torque Motors Having High Torque Density, Used in Accurate Drive Systems
- date: 2011-01-05
- words: 2305
- flesch: 58
- summary: Normal flux density diagram in the stator core area Fig. 22: Torque motor with a large air-gap in load condi- tions at 1A – magnetic field distribution 78 Acta Polytechnica Vol. Users nowadays require very high-performance limited angle torque motors with high density torque.
- keywords: air; angle; area; area fig; axis; axis fig; density; density diagram; diagram; field; fig; flux; flux density; gap; large; limited; magnet; magnet axis; magnetic; motor; normal; normal flux; stator; tangential; torque; vol
- versions: original; plain text
- ap-1448
- author: Petrák, V.; Krucký, J.; Vlčková, M.
- title: Boron Doped Nanocrystalline Diamond Films for Biosensing Applications
- date: 2011-01-05
- words: 2957
- flesch: 54
- summary: In this work we attempt to construct and disrupt supported lipid membranes (SLB) on boron doped nanocrystalline diamond (B-NCD). This is themain reason why the B-NCD sensor will work much more effectively with hydrogenated surfaces.
- keywords: absolute; acta; addition; band; bending; biomedical; change; circuit; czech; data; diamond; disruption; eis; electrode; equivalent; formation; frequency; impedance; lipid; liposomes; melittin; membrane; modeling; ncd; peptide; phase; polytechnica; prague; resistance; samples; sensor; slbs; solid; solution; supported; surface; technical; university; value; vol
- versions: original; plain text
- ap-1450
- author: Petráková, V.
- title: Optical Detection of Charged Biomolecules: Towards Novel Drug Delivery Systems
- date: 2011-01-05
- words: 2523
- flesch: 53
- summary: When comparing the effects observed on fluori- nated ND with the effects on oxidized ND, we find that the effect is much stronger for fluorinated ND. In our work, we study how surface modification of ND can change the color of ND luminescence (PL).
- keywords: acta; bond; cellular; centers; changes; charge; czech; delivery; density; diamond; different; drug; effect; figure; fluorinated; high; hydrogen; imaging; luminescence; modeling; molecules; nanodiamond; observed; polymers; polytechnica; properties; size; solution; spectra; states; surface; systems; temperature; vivo; vol; work
- versions: original; plain text
- ap-1452
- author: Safan, M. A.
- title: Performance of Beams Made of Low-cost Self-compacting Concrete in an Aggressive Environment
- date: 2011-01-05
- words: 6139
- flesch: 59
- summary: 3 Experimental study The experimental work included the manufacture of two sets of test beams. 51 No. 5/2011 Fig. 4: Exposure of test beams in an open environment under a sustained load Fig.
- keywords: aci; acta; aggregate; ash; beams; carbonation; cement; chloride; concrete; content; control; corroded; corrosion; cost; cracking; days; deflection; different; dolomite; ductility; durability; environment; exposure; failure; figure; fine; fly; fresh; fume; high; index; limestone; load; loading; low; main; materials; maximum; measured; mixes; penetration; percent; performance; polytechnica; powder; properties; rate; rebars; reduction; reinforcement; resistance; results; scc; self; service; silica; silica fume; specific; steel; stiffness; strength; structural; sustained; table; terms; test; test beams; type; ultimate; use; vol; water; weight; year
- versions: original; plain text
- ap-1454
- author: Schlebusch, T.
- title: Unobtrusive Health Screening on an Intelligent Toilet Seat
- date: 2011-01-05
- words: 3220
- flesch: 53
- summary: Keywords: monitoring of vital parameters, personal healthcare, ambient assisted living, electrocardiogram, bioimpe- dance, toilet seat. 51 No. 5/2011 Fig. 6: Comparison of toilet seat ECG with conventional lead 1 a) typical male b) typical female Fig. 7: Weight distribution on a toilet seat 4.2 ECG measurement An example of an ECGmeasurement is shown in Fi- gure 6.
- keywords: aachen; acta; amplifier; analysis; bioimpedance; bis; body; care; contact; current; daily; data; device; ecg; electrodes; electronics; engineering; figure; gel; health; heart; higher; home; human; hydro; ieee; impedance; intelligent; kim; layer; leonhardt; measurement; medical; monitoring; paper; parameters; patient; polytechnica; possible; rate; reference; results; right; seat; signal; subject; systems; toilet; toilet seat; typical; use; vol
- versions: original; plain text
- ap-1456
- author: Schommartz, A.; Eilebrecht, B.; Wartzek, T.; Walter, M.; Leonhardt, S.
- title: Advances in Modern Capacitive ECG Systems for Continuous Cardiovascular Monitoring
- date: 2011-01-05
- words: 3136
- flesch: 53
- summary: This principle can also achieve interference reduction in capacitive ECG measurements. Multi-channel cECG systems enable the extraction of ECG signals even in the presence of coupled interferences, due to the additional redundant information.
- keywords: aachen; acta; body; capacitive; cecg; chair; channel; contact; coupling; degree; dipl.-ing; ecg; eilebrecht; electrodes; engineering; feedback; figure; filter; frequency; gain; germany; high; ieee; impedance; information; lead; leonhardt; low; measurements; medical; monitoring; multi; patient; polytechnica; pressure; research; robust; signal; surface; systems; technique; technology; university; vol; years
- versions: original; plain text
- ap-1458
- author: Ulbrich, M.; Schauermann, A.; Leonhardt, S.
- title: The Influence of Heart and Lung Dynamics on the Impedance Cardiogram — A Simulative Analysis
- date: 2011-01-05
- words: 2509
- flesch: 51
- summary: Impedance changes have been computed for all points in time and both dynamic sources, so that in total 206 simulations have been conducted (see Fi- gure 5). Fig. 4: Simulation model and current density results All simulations have been calculated on a per- sonal computer with a 64 bit operating system, an IntelR© XeonR© 5240processorwith2coresand24GB RAM.
- keywords: aachen; acta; addition; bioimpedance; cardiography; change; conductivity; current; data; dynamic; engineering; figure; finite; fit; frequency; heart; high; human; icg; impedance; influence; lung; measured; model; physiological; polytechnica; resolution; results; signal; simple; simulations; sources; technique; technology; temporal; thorax; time; tissue; vol; volume
- versions: original; plain text
- ap-1460
- author: Vecka, J.
- title: Impacts of New EU and Czech Environmental Legislation on Heat and Electricity Prices of Combined Heat and Power Sources in the Czech Republic
- date: 2011-01-05
- words: 4111
- flesch: 56
- summary: Table 2: Pollution fees — current and proposed in CZK per ton Pollutant Dust SOx NOx VOC Current 3000 1000 800 2000 2012–2016 4200 1350 1100 2700 2017 6300 2100 1700 4200 2018 8400 2800 2200 5600 2019 10500 3500 2800 7000 2020 12600 4200 3300 8400 2021 14700 4900 3900 9800 2022 and further 29400 9800 7800 19600 3 Future of heat prices in the Czech Republic after 2012 In the case of heat prices, therewill be no direct impact on costs or revenues for these com- panies because of the heat price structure (regulated by the Energy Regulatory Office).
- keywords: allocation; allowances; benchmark; co2; coal; czech; decision; derogation; directive; district; efficiency; electricity; emission; energy; environmental; eua; eur; fees; free; fuel; future; gas; heat; heating; ied; impact; implementation; increase; legislation; limits; model; natural; new; pollution; price; producers; production; republic; respect; scenario; sources; table; technology; tool; trading; value; vol
- versions: original; plain text
- ap-1462
- author: Anisimova, E.; Páta, P.; Blažek, M.
- title: Stellar Object Detection Using the Wavelet Transform
- date: 2011-01-06
- words: 1721
- flesch: 60
- summary: Keywords: stellar object detection, wavelet transform. For each image there are in the first line: the number of detected stars with the coordi- nates found in the catalog, the number of detected stars not found in the catalog, the percentage of de- tected starswith coordinates found in the catalogout of the total number of objects in the catalog for the image (second row).
- keywords: algorithm; astronomical; background; catalog; coefficients; decomposition; detected; detection; image; level; light; number; objects; results; sextractor; stars; stellar; total; transform; trous; vol; wavelet; web
- versions: original; plain text
- ap-1464
- author: Gális, R.; Hric, L.; Kundra, E.; Münz, F.
- title: Cataclysmic Variables — X-rays and Optical Activity in V1223 Sgr and V709 Cas
- date: 2011-01-06
- words: 2381
- flesch: 64
- summary: X-ray emission is produced by the inter- action of the accreting matter with the WD surface. Typically, soft X-ray modulations were observed in the orbital period, in spin period ofWD, or a beat between the two in IPs.
- keywords: activity; analysis; astron; astrophys; band; bremsstrahlung; curves; cvs; data; emission; energy; fluxes; hard; ibis; integral; intermediate; ips; light; long; magnetic; objects; optical; orbital; panel; period; polars; ray; s−1; temperature; term; time; v1223sgr; variability
- versions: original; plain text
- ap-1466
- author: Hölzl, J.; Wilms, J.; Kreykenbohm, I.; Schmid, Ch.; Grossberger, Ch.; Wille, M.; Eikmann, W.; Brand, T.
- title: Observing Galaxy Clusters with eROSITA: Simulations
- date: 2011-01-06
- words: 1365
- flesch: 65
- summary: Galaxy clusters form inareasoverdensewith respect to themeanden- sity of the universe and therefore trace the large-scale structure, such that a statistically complete sample of clusters provides us with information about the cosmological parameters [4]. Amain objective of the survey is to observe galaxy clusters in order to constrain cosmological parameters and to obtain further knowledge about dark matter and dark energy.
- keywords: astrophys; catalogue; clusters; cosmological; dark; density; energy; erosita; evolution; function; galaxy; gamma; mass; matter; parameters; power; ray; redshift; simulation; sky; spectrum; survey; telescopes; universe
- versions: original; plain text
- ap-1468
- author: Hudec, R.; Blažek, M.; Hudcová, V.
- title: Czech Participation in INTEGRAL: 1996–2011
- date: 2011-01-06
- words: 4949
- flesch: 56
- summary: In this paper, we deal with examples of observa- tions and analyses of INTEGRAL data with Czech participation, focusing on two categories of objects, namely cataclysmic variables (CVs) and blazars. In addition, wehaveworkedon transferring ISDC s/w packages, further development of tools for effec- tive and interactive scientific analyses and the use of INTEGRAL data, further improving the quality of astrometry and photometry, and on operating the second (local) ISDC center/office (Ondrejov Integral Data Center, OIDC) at the Ondrejov Astronomical Institute, enabling the astronomical community in the Czech Republic and in Central and East Europe to participate in scientific activities related to IN- TEGRAL, data evaluation, data archiving, and in- terpretation.
- keywords: access; acta; analysis; archive; astronomical; available; blazars; camera; cases; cataclysmic; catalogue; center; code; cvs; czech; data; database; deg; development; energy; esa; et al; field; fig; fov; gamma; ground; hard; high; hudec; ibis; images; information; integral; involvement; ips; isdc; java; kev; kubanek; long; new; objects; observations; observatory; omc; optical; pages; participation; petr; pixel; polytechnica; provide; ray; related; republic; results; rts2; satellite; science; scientific; sources; space; telescope; test; time; tool; use; variables; view; vol; web; years
- versions: original; plain text
- ap-1470
- author: Hudec, R.; Pína, L.; Maršíková, V.; Inneman, A.; Skulinová, M.; Míka, M.
- title: Czech Contribution to Athena
- date: 2011-01-06
- words: 3827
- flesch: 57
- summary: 1 Introduction Design and development of X-ray optics have a long tradition in the Czech Republic (e.g. Hudec et al., 1991, 1999, 2000, 2001, Inneman et al. 1999, 2000). However, the application of this technology in X-ray optics is re- lated to the need to improve accuracy significantly andminimize errors.
- keywords: accuracy; alternative; athena; available; baez; czech; design; development; esa; foils; forming; future; glass; high; hudec; inneman; large; mirrors; optical; optics; order; parameters; prague; precise; process; project; ray; ray optics; republic; results; samples; si wafers; silicon; space; spie; substrates; surface; technologies; technology; telescopes; thermal; thickness; vol; wafers; wolter
- versions: original; plain text
- ap-1472
- author: Lewandowska, N.; Elsäesser, D.; Mannheim, K.
- title: Search for a Correlation Between Radio Giant Pulses and VHE Photons of the Crab Pulsar
- date: 2011-01-06
- words: 2016
- flesch: 63
- summary: 51 No. 6/2011 Search for a Correlation Between Radio Giant Pulses and VHE Photons of the Crab Pulsar N. Lewandowska, D. Elsäesser, K. Mannheim Abstract The Crab pulsar is a unique source of pulsar radio emission. Among the regular pulses, radio giant pulses (GPs) are known as a special form of pulsar radio emission.
- keywords: astrophysical; bilous; cherenkov; correlation; crab; emission; fermi; giant; gps; hankins; journal; kondratiev; lyutikov; model; observations; photons; proceedings; pulsar; pulses; radio; science; vol
- versions: original; plain text
- ap-1474
- author: Litzinger, E.; Pottschmidt, K.; Wilms, J.; Suchy, S.; Rothschild, R. E.; Kreykenbohm, I.
- title: Monitoring PSR B1509–58 with RXTE: Spectral analysis 1996–2010
- date: 2011-01-06
- words: 1454
- flesch: 70
- summary: 3: Pulse profiles for the energy range 3–43keV of PSR B1509–58 for the three major epochs 3, 4 and 5 5 Phase resolved spectra All pulsed (i.e., peak minus off-peak) and unpulsed (regular background) spectrawere summed to obtain averaged spectra for epochs 3–5, respectively. 51 No. 6/2011 Table 1: Best fit parameters for the phase averaged PCU2 spectra of calibration epoch 3–5 Parameter Epoch 3 Epoch 4 Epoch 5 Γ 2.022±0.001 2.021±0.001
- keywords: averaged; b1509–58; best; calibration; emission; epoch; fig; fit; law; line; monitoring; parameters; pcu2; phase; power; psr; pulse; resolved; sec; spectra; table; time; unpulsed
- versions: original; plain text
- ap-1476
- author: Meddi, F.; Ambrosino, F.; Rossi, C.; Nesci, R.; Sclavi, S.; Ruggieri, A.; Sestito, S.; Bruni, I.; Gualandi, R.
- title: A New Fast Silicon Photomultiplier Photometer
- date: 2011-01-06
- words: 1515
- flesch: 53
- summary: 51 No. 6/2011 Fig. 5: Power Spectra of the Crab Pulsar signal detected by MPPC0 (upper) and P3E0 (lower) Fig. : Crab Pulsar light curves folded by “efold” for MPPC0 (upper) and P3E0 (lower)
- keywords: astronomical; crab; data; detectors; electronic; fast; fig; figure; light; loiano; magnitude; mppc0; optical; p3e; photometer; pps; pulsar; pulse; ray; signal; sipm; system; telescope; time; unit
- versions: original; plain text
- ap-1478
- author: Mészáros, A.; Řípa, J.; Ryde, F.
- title: A Crazy Question: Can Apparently Brighter Gamma-ray Bursts Be Farther Away?
- date: 2011-01-06
- words: 1764
- flesch: 73
- summary: In these mainly statistical studies, akeyrole is playedby theassumption that— on average — apparently fainter bursts should lie in smaller redshifts. Here it is quite evident that some of the distant bursts exceed in their observed fluence and peak-fluxes the values of those with smaller redshifts.
- keywords: brighter; bursts; erg; fluences; fluxes; grbs; left; long; l̃(z; mészáros; observed; p(z; panel; peak; quadrants; redshifts; right; sample; swift; units
- versions: original; plain text
- ap-1480
- author: Obst, M.; Pottschmidt, K.; Lohfink, A.; Wilms, J.; Böck, M.; Smith, D. M.; Tomsick, J. A.; Kreykenbohm, I.
- title: GRS 1758–258: RXTE Monitoring of a Rare Persistent Hard State Black Hole
- date: 2011-01-06
- words: 1621
- flesch: 68
- summary: Soft states are highlighted for episodes reaching a photon index above 2 Fig. During themonitoring, there are 7 occurrences of soft states with photon indices softer than 2.
- keywords: acta; black; emission; figure; flux; galactic; grs1758–258; hard; hardness; hid; hole; line; monitoring; observations; persistent; photon; polytechnica; pottschmidt; ridge; rxte; soft; source; spectrum; state; vol
- versions: original; plain text
- ap-1482
- author: Páta, P.
- title: Influence of the Lossy Compression JPEG2000 standard on the Deformation of PSF
- date: 2011-01-06
- words: 1253
- flesch: 53
- summary: Image compression based on the wavelet transform is nowadays very popular because of its nice properties. Keywords: Astronomical lossy image compression, PSFdeformation, Astronomical ContextCoder (ACC), JPEG2000.
- keywords: acta; algorithms; astronomical; compression; deformation; different; figure; function; image; imaging; influence; jpeg2000; lossy; object; paper; point; polytechnica; processing; psf; quality; spread; standard; system
- versions: original; plain text
- ap-1484
- author: Piotrowski, L. W.; Zarnecki, A. F.
- title: Analysis and Simulation of the Pi of the Sky Detector Response
- date: 2011-01-06
- words: 1789
- flesch: 55
- summary: 51 No. 6/2011 Fig. 5: Left: Comparison of the position determination accuracy from polynomial model profile astrometry and from ASASaperture astrometry, for stars brighter than 9m; 2 Laboratory measurements and modelling The derivation of a PSF requires a star profile with sub-pixel resolution, which can be obtained from a superposition of single star images.
- keywords: ccd; centre; data; diode; field; figure; frame; function; images; laboratory; large; left; measurements; model; optical; photometry; pixel; point; polynomial; position; prf; psf; results; right; sensitivity; signal; single; sky; spot; stars
- versions: original; plain text
- ap-1486
- author: Roháč, J.; Řeřábek, M.; Hudec, R.
- title: Multi-functional star tracker — future perspectives
- date: 2011-01-06
- words: 1634
- flesch: 50
- summary: Variousattitude reference sources canbe used for obtaining attitude information, e.g. Earth horizon sensors, which can be directed towards the Sun, Moon, or other planets and stars, Sun sensors, magnetometers, and star trackers (STs). The ST autonomously performs pattern recognition of stars in FoV, compares the re- sults with the star catalogue stored in the internal memory, and estimates the attitude.
- keywords: astronomical; attitude; camera; concept; current; czech; data; field; fov; function; idea; image; information; lens; multi; optical; power; prague; precise; processing; profile; sensors; sky; space; star; stellar; sts; systems; tracker; uwfc; wfst; wide
- versions: original; plain text
- ap-1488
- author: Siudek, M.; Batsch, T.; Castro-Tirado, A. J.; Czyrkowski, H.; Cwiok, M.; Dabrowski, R.; Jelínek, M.; Kasprowicz, G.; Majcher, A.; Majczyna, A.; Malek, K.; Mankiewicz, L.; Nawrocki, K.; Opiela, R.; Piotrowski, L. W.; Sokolowski, M.; Wawrzaszek, R.; Wrochna, G.; Zaremba, M.
- title: Pi of the Sky Telescopes in Spain and Chile
- date: 2011-01-06
- words: 1825
- flesch: 58
- summary: Keywords: Gamma Ray Burst (GRB), prompt optical emissions, optical flashes, nova stars, variable stars, robotic telescopes. Cameras with STA0820 2k ×
- keywords: acta; cameras; ccd; detector; fig; figure; final; flashes; gamma; gcn; institute; new; observations; observatory; optical; poland; polytechnica; prompt; prototype; ray; robotic; sky; spain; spda; stars; system; telescopes; time; unit; university; vol; warsaw
- versions: original; plain text
- ap-1490
- author: Siudek, M.; Malek, K.; Mankiewicz, L.; Opiela, R.; Sokolowski, M.; Zarnecki, A. F.
- title: Photometric Analysis of the Pi of the Sky Data
- date: 2011-01-06
- words: 1723
- flesch: 53
- summary: 51 No. 6/2011 Photometric Analysis of the Pi of the Sky Data M. Siudek, K. Malek, L. Mankiewicz, R. Opiela, M. Sokolowski, A. F. Żarnecki Abstract A database containing star measurements from the period 2006–2009 taken by the Pi of the Sky detector located in Las Campanas Observatory in Chile contains more than 2 billion measurements of almost 17 million objects. 51 No. 6/2011 Fig. 1: Precision dispersion of star brightness measurements from standard photometry for 200s exposures (20 coad- ded frames) from the Pi of the Sky prototype at the Las Campanas Observatory in Chile.
- keywords: analysis; average; correction; curve; data; database; detector; fig; figure; filters; interface; light; magnitudo; measurements; objects; order; photometry; precision; quality; reference; sky; spectral; stars; system; variable; vol; web
- versions: original; plain text
- ap-1492
- author: Švéda, L.; Landováa, M.; Míka, M.; Pína, L.; Havlíková, R.; Maršíková, V.
- title: Thermal Forming of Glass — Experiment vs. Simulation
- date: 2011-01-06
- words: 2124
- flesch: 59
- summary: Keywords: X-ray mirrors, Comsol Multiphysics, simulations, thermal forming, gravity forming, in-situ measurements, data processing. [3] Chen, Y.: Thermal forming process for precision freeform optical mirrors and micro glass optics, PhD thesis, The Ohio State University, 2010.
- keywords: data; doors; experiments; figure; forming; function; glass; image; measurements; method; optics; order; points; polytechnica; prague; process; processing; ray; sample; shape; shaping; simulation; speed; support; temperature; thermal; time; values; vol
- versions: original; plain text
- ap-1494
- author: Valtonen, M.; Sillanpää, A.
- title: 2005–2010 Multiwavelength Campaing of OJ287
- date: 2011-01-06
- words: 5688
- flesch: 70
- summary: [5] Sillanpää, A., Haarala, S., Valtonen,M. J., Sun- delius, B., Byrd,G.G.: Astrophys. [8] Valtonen, M. J.: Workshop onTwo Years of In- tensive Monitoring of OJ 287 and 3C66A, Pro- ceedings of the meeting held in Oxford.
- keywords: accretion; acta; astron; astrophys; band; binary; black; bremsstrahlung; curve; cycle; data; disk; et al; expected; extinction; figure; flux; galaxy; general; hole; host; jet; lehto; light; line; m. j.; mass; model; mon; nature; observations; oj287; optical; orbit; order; outburst; period; points; polarization; polytechnica; precessing; prediction; radiation; radio; ras; ref; relativity; secondary; september; sillanpää; spectrum; test; time; timing; valtonen; value; vol; year
- versions: original; plain text
- ap-1496
- author: Bagoly, Z.; Veres, P.; Horváth, I.; Mészáros, A.; Balázs, L. G.
- title: On the Relation Between GRB Classes and X-ray Flashes
- date: 2012-01-01
- words: 2129
- flesch: 64
- summary: The observational properties show that intermediate bursts are the softest among the three groups, meaning that their emission is concentrated to low-energy bands. 52 No. 1/2012 Table 1: Bivariate model parameters for the best-fitted (EEI) model.
- keywords: average; best; bic; bivariate; budapest; bursts; class; classification; component; definition; different; duration; energy; flashes; grbs; group; hardness; hungary; intermediate; long; model; parameters; population; ray; short; softest; swift; university; xrfs
- versions: original; plain text
- ap-1498
- author: Giovannelli, F.; Sabau-Graziati, L.
- title: The Intriguing Nature of the Cataclysmic Variable SS Cygni
- date: 2012-01-01
- words: 4805
- flesch: 70
- summary: Martinez-Pais et al. also determined that the optical companion of SS Cyg system is a K2–K3 late-type star. However, they cannot fit SS Cyg data by a simple model as white dwarf plus accretion disk.
- keywords: 1/2012; accretion; acta; apj; behaviour; cvs; cyg; data; disk; dwarf; emission; et al; field; gaudenzi; giovannelli; intermediate; ips; lines; luminosity; magnetic; martinez; multifrequency; nature; novae; optical; orbital; outburst; pais; panel; period; polar; polytechnica; quiescence; ray; ss cyg; system; s−1; vol; warner; white
- versions: original; plain text
- ap-1500
- author: Grossberger, C.; Kadler, M.; Wilms, J.; Müller, C.; Beuchert, T.; Ros, E.; Ojha, R.; Aller, M.; Aller, H.; Angelakis, E.; Fuhrmann, L.; Nestoras, I.; Schmidt, R.; Zensus, J. A.; Krichbaum, T. P.; Ungerechts, H.; Sievers, A.; Riquelme, D.
- title: Structural Variability of 3C 111 on Parsec Scales
- date: 2012-01-01
- words: 2501
- flesch: 67
- summary: 4 Summary In this paper, the ejection of new jet components on parsec scales were associated with a major flux density outburst of 3C 111 in 2007. It was shown that the major flux density outburst can be asso- ciated with the ejection of a primary jet component and secondary component.
- keywords: aller; apj; associated; component; core; data; density; ejection; epoch; et al; evolution; figure; flux; flux density; galaxies; jet; jets; major; model; outburst; polytechnica; primary; program; radio; region; secondary; source; time; trailing; vlba
- versions: original; plain text
- ap-1502
- author: Hudec, R.; Kopel, F.; Krapp, P.; Heber, U.; Cayé, W.
- title: The Optical Transient Search in the Bamberg Southern Sky Survey: Preliminary Results
- date: 2012-01-01
- words: 1907
- flesch: 56
- summary: We have identified a total of 189 suspicious objects (possible OT candidates according to notes in the measurement logs) found in 6 measurement logs, corresponding to a total of 5 004 fully investi- gated southern sky patrol plates. We have re-analysed these logs and re-detected and investigated relevant OT candidates.
- keywords: acta; afterglows; astronomical; bamberg; blinkmicroscope; candidates; fig; gamma; hudec; image; left; measurement; new; objects; observatory; optical; past; patrol; photographic; plates; ray; right; sky; southern; stars; study; surveys; total; variable; vol
- versions: original; plain text
- ap-1504
- author: Hudec, R.; Hudec, L.; Klíma, M.
- title: Ultra Low Dispersion Spectroscopy with Gaia and Astronomical Slitless Surveys
- date: 2012-01-01
- words: 3692
- flesch: 59
- summary: The motivation for studies comparing these two databases is as follows: (1) A comparison of the sim- ulated Gaia BP/RP images with those obtained from digitized Schmidt spectral plates (both using disper- sive elements) for 8 selected test fields, and (2) A fea- sibility study for application for the algorithms devel- oped for the plates for Gaia. Variability studies based on low dispersion spec- tra are expected to provide unique novel data, and can use the algorithms recently developed for auto- matic analyses of digitized spectral Schmidt plates.
- keywords: 1/2012; acta; algorithms; alpha; analyses; astronomical; czech; data; deg; digitized; dispersion; emission; emphasis; esa; examples; fig; figure; gaia; henize; hudec; image; institute; large; lds; lines; low; methods; objective; objects; pari; photometric; pixel; plates; polytechnica; prism; project; resolution; schmidt; sky; sonneberg; southern; spectral; spectroscopy; stars; study; survey; telescope; ultra; usa; variability; vol
- versions: original; plain text
- ap-1506
- author: Jelínek, M.; Gorosabel, J.; Castro-Tirado, A. J.; Postigo, A. de Ugarte; Guziy, S.; Cunniffe, R.; Kubánek, P.; Prouza, M.; Vítek, S.; Hudec, R.; Reglero, V.; Sabau-Graziati, L.
- title: BOOTES Observation of GRB 080603B
- date: 2012-01-01
- words: 2597
- flesch: 77
- summary: [3] Eisenstein, D. J., Weinberg, D. H., Agol, E., Ai- hara, H., Allende Prieto, C., Anderson, S. F., Arns, J. A., Aubourg, É., Bailey, S., Bal- binot, E., et al.: SDSS-III: Massive Spectro- scopic Surveys of the Distant Universe, the Milky Way, and Extra-Solar Planetary Systems. 5 Conclusions The 0.6 m telescope BOOTES-2 in La Mayora ob- served the optical afterglow of GRB 080603B in three filters.
- keywords: 080603b; afterglow; b-1b; b-2; band; bootes; break; circular; clear; decay; distribution; gamma; gcn; gcn circular; grb; grb080603b; images; infrared; jun; lightcurve; mjy; observations; optical; pairitel; ray; spain; table; telescope; trigger; vol
- versions: original; plain text
- ap-1508
- author: Nesci, R.; Maselli, A.; Montagni, F.; Sclavi, S.
- title: S5 1803+78 Revisited
- date: 2012-01-01
- words: 2366
- flesch: 75
- summary: Many BL Lacs are X-ray sources and are a substantial part of the extragalactic sources detected in γ rays. I = 1.1 mag during all our monitoring, a typical value for LBL sources, corresponding to spectral index −1.6.
- keywords: compton; curve; data; days; emission; flares; flux; gst; lacs; lbl; light; mag; monitoring; nesci; observations; observed; optical; ray; scale; source; spectral; synchrotron; time; variations
- versions: original; plain text
- ap-1510
- author: Szécsi, D.; Bagoly, Z.; Horváth, I.; Balázs, L. G.; Veres, P.; Mészáros, A.
- title: GRB Duration Distribution Considering the Position of the Fermi
- date: 2012-01-01
- words: 1479
- flesch: 68
- summary: Keywords: gamma-ray burst, Fermi, background. We need further investigations to decide this question, but since the shape of the dis- tribution is analogous to the literature (logarithmic distribution with two peaks), we will develop and use this method for further Fermi GRB analyses.
- keywords: background; budapest; burst; data; detector; distribution; fermi; figure; gamma; gbm; lightcurve; method; orientation; position; ray; statistical; time; university
- versions: original; plain text
- ap-1512
- author: Kapilan, N.
- title: Production of Biodiesel from Vegetable Oil Using Microware Irradiation
- date: 2012-01-01
- words: 2941
- flesch: 59
- summary: The fuel property analysis shows that the properties of jatropha oil biodiesel satisfy the biodiesel standards, and are close to the fossil diesel standards. The production of biodiesel from jatropha oil using a conventional heating method takes more than 1h.
- keywords: 1/2012; acid; acta; alternative; analysis; astm; biodiesel; biodiesel production; bis; calorific; content; conventional; curcas; energy; fossil; fuel; higher; india; irradiation; jatropha; jatropha oil; june; method; microwave; mob; nmr; oil; point; polytechnica; production; properties; reaction; renewable; standard; step; sustainable; time; transesterification; value; vegetable; vol; work
- versions: original; plain text
- ap-1514
- author: Kutilek, P.; Viteckova, S.
- title: Prediction of Lower Extremity Movement by Cyclograms
- date: 2012-01-01
- words: 5756
- flesch: 59
- summary: For a study of gait we have used new methods based on an analysis of gait angles using cyclograms (also called angle-angle diagrams or cyclokinograms) and artificial intelligence to predict human motion of legs/prostheses. The creation of cyclograms is based on gait angles that are objective, reliable and well suited for statistical study [14].
- keywords: account; acta; analysis; angle; applications; area; artificial; axis; body; control; curve; cycle; cyclogram; data; diagram; dimensional; figure; gait; hip; human; inclination; input; intelligence; issue; joint; knee; learning; lower; markers; methods; model; moment; motion; movement; network; neural; neural network; new; points; polytechnica; practice; predicted; prediction; rehabilitation; second; segments; speed; states; study; subject; symbols; system; table; target; time; training; university; use; values; vol; walking
- versions: original; plain text
- ap-1516
- author: Sláma, J.
- title: Plasma Flow and Temperature in a Gliding Reactor with Different Electrode Configurations
- date: 2012-01-01
- words: 2017
- flesch: 58
- summary: Keywords: gliding discharge, spectra, shape of electrodes, plasma reactor, plasma flow, temperature. Based on the NIST database [4], we found four spectral lines — λA, λB, λC and λD — typical for low temperature plasma in air.
- keywords: axis; camera; circular; configuration; discharge; distribution; divergent; electrodes; figure; flow; gas; gliding; guide; high; infrared; plasma; probes; reactor; region; shapes; spectra; temperature; visible
- versions: original; plain text
- ap-1518
- author: Al-Turki, Y. A.; Attia, A.-F.; Soliman, H. F.
- title: Optimization of Fuzzy Logic Controller for Supervisory Power System Stabilizers
- date: 2012-01-02
- words: 4753
- flesch: 61
- summary: However, the output space has 5 dif- ferent fuzzy sets. The idea of a 2nd order fuzzy set was introduced byMelikhov to obtain a boundary ofGaussian shape of themembership function [13].
- keywords: 2/2012; 2nd; acta; adaptive; adaptive fuzzy; algorithm; case; change; chromosome; conditions; constraints; controller; deviation; dynamic; equal; fig; figure; function; fuzzy; fuzzy set; gaflc; gaussian; generator; genetic; input; lines; load; logic; machine; order; output; parameters; polytechnica; power; proposed; pss; results; rotors; rules; set; sets; sflc; simulation; speed; static; study; synchronous; system; table; time; variables; vol
- versions: original; plain text
- ap-1520
- author: Balázs, L. G.; Mészáros, A.; Horváth, I.; Bagoly, Z.; Veres, P.; Tusnády, G.
- title: Angular Distribution of GRBs
- date: 2012-01-02
- words: 5335
- flesch: 67
- summary: There are several tests for checking the complete randomness of point patterns, but these procedures do not always give information for both properties simultaneously. [14] Cline, D. B., Matthey, C., Otwinowski, S.: Gamma-Ray Bursts: 5th Huntsville Symp., In Kippen, R. M., Mallozzi, R. S., Fishman, G. J. (eds.):
- keywords: 2/2012; acta; angular; apj; area; bagoly; balázs; batse; bursts; case; cell; correlated; different; dimension; distances; distribution; euclidean; factor; grbs; hidden; horváth; intermediate; long; mean; mészáros; minimal; mnras; mst; non; number; p256; paper; pattern; point; polytechnica; randomness; samples; section; short; significance; simulated; simulations; sky; spanning; spectrum; sphere; squared; statistical; t90; tesselation; test; tree; variables; vol; voronoi
- versions: original; plain text
- ap-1522
- author: Baroch, V.; Duchoň, B.; Faifrová, V.; Říha, Z.
- title: Teaching Management at Technical Universities, Business Reality in the Academic Environment
- date: 2012-01-02
- words: 2808
- flesch: 55
- summary: 52 No. 2/2012 Teaching Management at Technical Universities, Business Reality in the Academic Environment V. Baroch, B. Duchoň, V. Faifrová, Z. Ř́ıha Abstract Students of technical universities often do not understand why their studies should include learning management skills (in addition to the study of economics). It also follows from these surveys that businesses require management skills to be trained at universi- ties (in-service training courses are an additional ex- pense for business companies [3]).
- keywords: 2/2012; acta; board; business; company; concept; ctu; decision; economics; environment; experience; form; game; graduates; graph; knowledge; making; management; polytechnica; practical; praha; real; simulation; skills; soft; source; students; study; survey; teaching; team; teamwork; technical; telecommunications; time; transportation; universities; university; vol
- versions: original; plain text
- ap-1524
- author: Ficker, T.
- title: An Optimal Procedure for Determining the Height Parameters of Fracture Surfaces
- date: 2012-01-02
- words: 1186
- flesch: 53
- summary: The first problem is that we do not know the optimal number of surface sites to be visited with the confocal mi- croscope in order to obtain reliable profile parameter values. 52 No. 2/2012 An Optimal Procedure for Determining the Height Parameters of Fracture Surfaces T. Ficker Abstract This paper presents an attempt to find an optimal procedure for determining the height parameters of fracture surfaces.
- keywords: acta; cement; confocal; deviation; ficker; fracture; height; measurements; measuring; number; parameters; percentage; polytechnica; profile; roughness; sites; statistical; surface; values
- versions: original; plain text
- ap-1526
- author: Havlásek, P.; Jirásek, M.
- title: Modeling of Concrete Creep Based on Microprestress-solidification Theory
- date: 2012-01-02
- words: 5958
- flesch: 57
- summary: 5 Conclusions The material model based on MPS theory has been successfully implemented into the OOFEM finite el- ement package, and has been used in simulations of concrete creep at variable temperature andhumidity. Tem- perature effect on concrete creep modeled by microprestress-solidification theory, Journal of Engineering Mechanics, 2004, 130, 6, 691–699.
- keywords: 2/2012; acta; age; aging; assumed; basic; compliance; compressive; concrete; constant; creep; cyclic; data; days; different; drying; duration; evolution; experimental; experimental data; figure; fit; humidity; loaded; loading; mechanical; microprestress; model; mpa; mps; original; parameters; polytechnica; relative; results; sealed; set; solidification; specimens; strain; t=71; temperature; theory; thermal; time; value; −6.27
- versions: original; plain text
- ap-1528
- author: Michalec, I.; Marônek, M.
- title: Influence of the Surface Layer when the CMT Process Is Used for Welding Steel Sheets Treated by Nitrooxidation
- date: 2012-01-02
- words: 2127
- flesch: 59
- summary: However, the surface layer is a major problem during the welding process, and welding specialists face many problems regarding the weldability of steel sheets. Keywords: steel sheet, nitrooxidation, Cold Metal Transfer, porosity.
- keywords: 2/2012; analysis; cmt; corgon18; ferrite; figure; joints; layer; material; metal; method; microhardness; microscopic; nitrooxidation; parameters; polytechnica; porosity; process; properties; research; results; sheets; steel; surface; table; treatment; values; vol; welding
- versions: original; plain text
- ap-1530
- author: Povolotskaya, E.; Mach, P.
- title: FMEA and FTA Analyses of the Adhesive Joining Process using Electrically Conductive Adhesives
- date: 2012-01-02
- words: 3780
- flesch: 62
- summary: FMEA is a technique for analyzing the occur- rence of process failures and their effect on the re- sult of a process [7]. There are four basic types of FMEA: process FMEA, system FMEA, de- signFMEAand serviceFMEA.FMEAproduces risk priority numbers (RPNs) as outcomes.
- keywords: 2/2012; acta; adhesive; analysis; approach; assessment; basic; causes; conductive; control; detection; eca; effect; electrical; engineering; events; failure; fault; fig; fmea; fta; improper; inappropriate; industrial; joining; joint; lead; material; methods; mode; nonlinearity; numbers; occurrence; pad; parts; polytechnica; potential; process; quality; reliability; resistance; risk; severity; step; table; technique; tree; types; typical; vol; × ×
- versions: original; plain text
- ap-1532
- author: Vítek, S.; Fliegel, K.; Páta, P.; Koten, P.
- title: Utilization of Image Intensifiers in Astronomy
- date: 2012-01-02
- words: 1113
- flesch: 55
- summary: 52 No. 2/2012 Utilization of Image Intensifiers in Astronomy S. V́ıtek, K. Fliegel, P. Páta, P. Koten Abstract In this paper we present the properties of image intensifiers, used together with fast TV cameras for astronomical purposes within the MAIA project(Meteor Automatic Imager and Analyser, primarily focused on observing meteoric events with high time resolution). This fact puts greater demands on image calibration.
- keywords: astronomical; automatic; camera; fliegel; gain; image; input; intensifier; koten; lens; light; mtf; noise; paper; resolution; response; spatial; spectral; system
- versions: original; plain text
- ap-1534
- author: Andert, David; Frydrych, Jan; Gerndtová, Ilona
- title: Use of Grasses and Mixtures of Grasses for Energy Purposes
- date: 2012-01-03
- words: 2240
- flesch: 62
- summary: Particular grass- land mixtures and grass species also react differently in terms of dry matter yield and optimum harvest time for biomass and its utilization for energy pur- poses during the harvest year. The optimum proportion of grass dry matter is from 35 to 50 % in the total d.m.
- keywords: agrostis; biogas; biomass; brome; canary; conditions; content; dry; dry matter; energy; fertilized; fertilized variant; gigantea; grass; grasses; grassland; green; harvest; highest; material; matter; mixtures; production; reed; results; seed; species; variant; yield
- versions: original; plain text
- ap-1536
- author: Biath, Peter; Ondruška, Juraj
- title: Idealized Compression Ratio for a Screw Briquetting Press
- date: 2012-01-03
- words: 1967
- flesch: 59
- summary: 52 No. 3/2012 Figure 2: Basic parts of the new screw press (1 – drive, 2 – storage node for screw and spindle, 3 – pressing chamber, 4 – feeding system) Figure 3: Pressing chamber (1, 2 – nozzles; 3 – pressing screw, 4 – feeding screw, 5 – collet, A, B, C, D, E – location of compaction) However, in this paper we will pay attention to creating the compression ratio by screw compaction only.
- keywords: briquetting; chamber; compaction; compression; compression ratio; design; feeder; feeding; figure; idealized; machine; material; nozzles; paper; parts; pressing; ratio; screw; section; space; technology; volume
- versions: original; plain text
- ap-1538
- author: Bukovský, Ivo; Kolovratník, Michal
- title: A Neural Network Model for Predicting NOx at the Mělník 1
- date: 2012-01-03
- words: 3077
- flesch: 55
- summary: For more recent works, including studies of conventional NN in energetic processes, we may refer to papers [5–8], which deal with computational intelligence tools (neural networks, genetic algorithms) focused on biomass combustion. 52 No. 3/2012 Figure 2: NOx prediction by the neural network (1)–(7) with re-configurations and re-training (Figure 1) Figure 3: Detail from Figure 2 — a good prediction Figure 4: Detail from Figure 2 — a bad prediction due to outliers in the training data which is a typical problem with the improper use of neural networks for complicated systems.
- keywords: 3/2012; acta; algorithm; boiler; combustion; control; conventional; data; dynamic; emissions; figure; hidden; ieee; input; layer; learning; measured; minute; model; modeling; network; neural; neural network; non; nox; order; output; polytechnica; prediction; preprocessing; process; qnu; real; recurrent; retraining; time; upca(k; variables; vol
- versions: original; plain text
- ap-1540
- author: Chríbik, Andrej; Polóni, Marián; Lach, Ján
- title: Effect of Gas Mixture Composition on the Parameters of an Internal Combustion Engine
- date: 2012-01-03
- words: 2270
- flesch: 53
- summary: The introduction is a brief statement of the nature of gas mixture compositions that are useful for the purposes of combustion engines, together with the basic physical and chemical properties relevant to the burning of this gas mixture. Several previously published results have shown a significant effect of blending hydrogen into natural gas with the aim to improve the emission parameters of internal combustion engines.
- keywords: basic; co2; combustion; combustion engine; course; engine; figure; fuel; gas; gases; h2ng0; h2ng15; hydrogen; increases; internal; internal combustion; lean; lgw; mixture; natural; natural gas; nox; operation; oxygen; parameters; proportion; range; syngas; synthesis; vol
- versions: original; plain text
- ap-1542
- author: Ismail, W. Ali; Braim, R. Rasul; Ketuly, K. Aziz; Awang Bujag, D. Siti Shamsiah; Arifin, Zainudin
- title: Production of Biocellulosic Ethanol from Wheat Straw
- date: 2012-01-03
- words: 4447
- flesch: 53
- summary: Acid hydrolysis is becoming more popular, due to its lower cost and greater ef- fectiveness than enzymatic hydrolysis [7]. Acid hydrolysis can be divided into two groups: (a) concentrated-acid hydrolysis and (b) dilute-acid hydrolysis.
- keywords: acetic; acid; acid hydrolysis; arabinose; baker; cellulose; cerevisiae; concentrated; concentration; culture; detoxification; effects; ethanol; ethyl; fermentation; figure; furfural; glucose; hclo4; heating; hemicellulose; hmf; hydrolysate; hydrolysis; l g; materials; min; perchloric; process; production; saccharomyces; stage; stipitis; straw; sugars; syringaldehyde; temperature; time; vanillin; wheat; wheat straw; xylose; yeast; yield
- versions: original; plain text
- ap-1544
- author: Janeba, Břetislav; Kolovratník, Michal; Bartoš, Ondřej
- title: Measurement of O2 in the Combustion Chamber of Apulverized Coal Boiler
- date: 2012-01-03
- words: 1921
- flesch: 59
- summary: Another disadvantage of classical types of O2 analyzers is that a flue gas sam- ple cooler needs to be used, which makes the entire measurement system complicated and delays the de- livery of the acquired information. Keywords: O2 measurement, Lambda probe, Pulverized coal boiler.
- keywords: air; analyzer; ash; boiler; chamber; cleaning; coal; combustion; combustion chamber; concentration; extraction; extraction line; figure; flue; gas; information; line; measured; measurement; min; new; operational; periodic; pipe; plant; power; sensor; tests
- versions: original; plain text
- ap-1546
- author: Jiříček, Ivo; Rudasová, Pavla; Žemlová, Tereza
- title: A Thermogravimetric Study of the Behaviour of Biomass Blends During Combustion
- date: 2012-01-03
- words: 2166
- flesch: 60
- summary: The handbook of biomass combustion and co-firing. The difference in burnout temper- ature between charcoal and other biomass samples was in the range of 51–73 ◦C, see Tabular 2.
- keywords: additive; biomass; blends; burning; burnout; ccf; charcoal; combustion; figure; fuels; heat; ignition; lignin; oxygen; particle; peat; process; rate; release; samples; size; straw; study; tbo; temperature; thermogravimetric; vol
- versions: original; plain text
- ap-1548
- author: Kolařík, Ladislav; Sahul, Miroslav; Kolaříková, Marie; Sahul, Martin; Turňa, Milan; Felix, Michal
- title: Resistance Spot Welding of dissimilar Steels
- date: 2012-01-03
- words: 1768
- flesch: 62
- summary: Praha, Czech Republic Correspondence to: Ladislav.Kolarik@fs.cvut.cz Abstract This paper presents an analysis of the properties of resistance spot welds between low carbon steel and austenitic CrNi stainless steel. Austenitic stainless steel and low carbon steel possess a good combination of mechanical properties, forma- bility, weldability and resistance to corrosion.
- keywords: analysis; austenitic; carbon; current; deltaspot; dissimilar; edx; figure; haz; joint; low; materials; metal; nugget; properties; resistance; spot; stainless; steel; welding; welds
- versions: original; plain text
- ap-1550
- author: Kracík, Petr; Pospíšil, Jiří; Šnajdárek, Ladislav
- title: Heat Exchangers for Condensation and Evaporation Applications Operating in a Low Pressure Atmosphere
- date: 2012-01-03
- words: 2076
- flesch: 64
- summary: [W] (5) • derivation equations of heat transfer through a circular wall The heat passage of the wall is composed of conduction, convection and also radiation. The calculation is based on Newton’s principle of heat transfer and the Fourier heat conduction principle, provided there is a parallel arrangement of pipes.
- keywords: 3/2012; acta; apparatus; bundle; chamber; coefficient; data; exchanger; figure; flow; heat; heat transfer; kpa; liquid; loops; measured; number; outside; polytechnica; power; pressure; temperature; thermocouples; transfer; tube; vacuum; vol; δtln
- versions: original; plain text
- ap-1552
- author: Krátký, Lukáš; Jirout, Tomáš; Nalezenec, Jiří
- title: Lab-scale Technology for Biogas Production from Lignocellulose Wastes
- date: 2012-01-03
- words: 2751
- flesch: 55
- summary: 52 No. 3/2012 A – scheme of the unit B – lab unit 1 – bottle with substrate, 2 – burette, 3 – balancing bottle Figure 6: Lab testing unit for investigating biogas yield In general, substrate pretreated with LHW is more digestible, the amount of biogas is increased, the residence time in the fermenter decreases, and pumping and homogenization are facilitated [5]. The effectiveness of a macerator is evaluated by the energy demand for comminution, the structure, and biogas tests of the treated material.
- keywords: anaerobic; ball; batch; biogas; biomass; comminution; energy; expansion; fermenter; figure; glucose; hot; lab; lhw; lignocellulose; liquid; macerator; methane; organic; potential; pressure; pretreatment; processing; scale; size; structure; substrate; technology; temperature; testing; tests; time; unit; vessel; vol; wastes; water; yield
- versions: original; plain text
- ap-1554
- author: Križan, Peter; Matúš, Miloš; Kers, Jaan; Vukelić, Djordje
- title: Change of Pressing Chamber Conicalness at Briquetting Process in Briquetting Machine Pressing Chamber
- date: 2012-01-03
- words: 2911
- flesch: 54
- summary: This type of pressing chamber is often used in the structure of briquetting machines. 52 No. 3/2012 Figure 6: Pressing force distribution across the pressing chamber Figure 6, left).
- keywords: axial; briquette; briquetting; chamber; compacting; conditions; conical; conical chamber; conicalness; density; experiment; figure; final; force; friction; impact; length; material; mathematical; model; parameters; pressed; pressing; pressure; process; quality; shape; temperature; wall
- versions: original; plain text
- ap-1556
- author: Lisý, Martin; Baláš, Marek; Moskalík, Jiří; Štelcl, Otakar
- title: Biomass Gasification — Primary Methods for Eliminating Tar
- date: 2012-01-03
- words: 3100
- flesch: 57
- summary: However, it seems that the addition of dolomite in the fluidized bed may be an effective primary measure for cutting down the tar content in fuel gas. The chart shows that a moderate drop in tar content in the gas was achieved, but that this drop was insignificant.
- keywords: 3/2012; acta; air; amounts; bed; biomass; calcination; catalyst; co2; composition; content; course; dolomite; drop; energy; engineering; experiments; feedstock; fluidized; fluidized bed; fuel; gas; gasification; gasifiers; grain; impact; interval; measures; methods; particles; polytechnica; primary; process; reactor; reduction; size; tar; temperature; use; vol; ways
- versions: original; plain text
- ap-1558
- author: Matúš, Miloš; Križan, Peter
- title: Modularity of Pressing Tools for Screw Press Producing Solid Biofuels
- date: 2012-01-03
- words: 2534
- flesch: 54
- summary: 52 No. 3/2012 Figure 1: Newly-patented design of a screw press Figure 2: Pressing chamber with tools (1 – feeding screw, 2 – pressing screw, 3 – pressing chamber, 4 – nozzles) and the continuous solid spindle with pressing screws on the ends (compressive stress). Pressing screws are designed as monolithic (Figure 3), as well as folded (Figure 8, Figure 9), which can have a rotating tip to reduce friction.
- keywords: axial; biomass; chamber; compaction; design; diameter; different; figure; geometry; high; increase; machine; material; modularity; nozzle; parameters; pressing; pressure; process; quality; raw; requirements; screw; screw press; shape; thread; tip; tools; variant; vol
- versions: original; plain text
- ap-1560
- author: Moskalík, Jiří; Škvařil, Jan; Štelcl, Otakar; Baláš, Marek; Lisý, Martin
- title: Energy Recovery from Contaminated Biomass
- date: 2012-01-03
- words: 2640
- flesch: 60
- summary: References [1] Baláš, M., Lisý, M.: Water-steam influence on biomass gasification process, Acta Metallurgica Slovaca, 11, 1, 2005, 14–21, (in Czech). The experiments show that the optimum temper- ature for chipboard gasification is somewhere around 800 ◦C. In gasification at temperatures in excess of 820 ◦C, fuel caking occurs in the fluidized bed, and it also solidifies above the grate.
- keywords: 3/2012; acta; analysis; ash; bed; biomass; chipboard; combustion; composition; compounds; contaminated; content; crushed; energy; experimental; fluidized; fuel; furniture; gasification; gasifier; heat; material; polytechnica; primary; process; production; sample; substances; table; tar; temperature; values; vol; wastes; wood
- versions: original; plain text
- ap-1562
- author: Pavlatová, Monika; Horáková, Marta; Hladík, Jan; Špatenka, Petr
- title: Plasma Surface Treatment of Powder Materials — Process and Application
- date: 2012-01-03
- words: 2800
- flesch: 53
- summary: 7 Conclusion This paper has presented a plasma treatment method for powder materials. [2,3] The bonding of new functional groups on the molecular chain during plasma surface treatment of polymer materials is one way in which this type of treatment can be used.
- keywords: 3/2012; abrasion; acta; adhesion; applications; cycles; czech; energy; figure; foam; higher; industrial; layer; material; modification; modified; paint; particles; plant; plasma; polyolefin; polytechnica; powder; process; production; properties; republic; sample; scale; sintered; surface; test; treatment; varnish; vol; water; wettability
- versions: original; plain text
- ap-1564
- author: Plaček, Viktor; Oswald, Cyril; Hrdlička, Jan
- title: Optimal Combustion Conditions for a Small-scale Biomass Boiler
- date: 2012-01-03
- words: 1869
- flesch: 52
- summary: However, a smaller combustion chamber leads to issues with combustion process control. Both the economic aspects and the ecological as- pects of optimal combustion can be affected by con- trolling the current excess air ratio.
- keywords: air; algorithm; approach; biomass; boiler; combustion; conditions; control; current; czech; emissions; excess; experimental; figure; fuel; grate; lambda; need; operation; optimal; prague; probe; process; ratio; scale; small; sweeping
- versions: original; plain text
- ap-1566
- author: Pilař, Lukáš; Hrdlička, Jan
- title: Research and development of CO2 Capture and Storage Technologies in Fossil Fuel Power Plants
- date: 2012-01-03
- words: 2449
- flesch: 56
- summary: – decreased efficiency — for this case, the post- combustion CO2 capture technology decreases the power plant’s efficiency by approximately 11 percentage points. The ammonia process consists of the following main components: – flue gas cooling and the flue gas fan – CO2 absorption – final cleaning of the scrubbed flue gas – CO2 desorption – CO2 final cleaning – CO2 compression – auxiliary cooling source – ammonia treatment A more detailed description is provided in the fol- lowing paragraphs: – flue gas cooling — the absorption process for the ammonia method takes place at low tem- peratures (5–10 ◦C), so the flue gas must be cooled down as much as possible before entering the process.
- keywords: absorption; amine; ammonia; capture; co2; coal; combustion; compressor; consumption; cooling; current; czech; efficiency; energy; flue; flue gas; gas; heat; method; mwe; parameters; plant; power; process; republic; solvent; steam; table; technology; temperature; vol; water
- versions: original; plain text
- ap-1568
- author: Štefanica, Jiří; Hrdlička, Jan
- title: Experimental Investigation of Radial Gas Dispersion Coefficients in a Fluidized Bed
- date: 2012-01-03
- words: 1933
- flesch: 61
- summary: Tracer gas was injected by pipe 3 in the middle of the perforated plate dis- tributor 5 (open area of 2.51 %) that was supporting the fluidized bed. %] concentration of tracer gas at a given point c∞ [vol.
- keywords: air; balls; bed; ceramic; coefficient; combustion; concentration; dgr; dispersion; experiment; figure; flow; fluidization; fluidized; gas; height; material; method; mixing; model; radial; rep; state; tracer; umf; velocity; vol
- versions: original; plain text
- ap-1570
- author: Turňa, Milan; Ondruška, Jozef; Turňová, Zuzana
- title: Explosion Cladding of Lead on Steel
- date: 2012-01-03
- words: 1921
- flesch: 68
- summary: Owing to its low melting point, lead is used with working temperatures only from 150 to 170 ◦C. Only technically pure lead is used in the chemical in- dustry as pure lead has the highest resistance against corrosion. 52 No. 3/2012 Explosion Cladding of Lead on Steel Milan Turňa1, Jozef Ondruška1, Zuzana Turňová1 1 Slovak University of Technology, Faculty of Materials Science and Technology, J. Bottu 25, 917 24 Trnava, Slovakia Correspondence to: milan.turna@stuba.sk Abstract This work deals with explosion cladding of lead on steel.
- keywords: 3/2012; acta; bimetals; boundary; chemical; cladding; explosion; figure; lead; materials; max; mechanical; mpa; peel; polytechnica; properties; quality; shear; specimens; steel; strength; table; technology; test; type; vol; welding
- versions: original; plain text
- ap-1572
- author: Baláš, Marek; Lisý, Martin; Štelcl, Ota
- title: The Effect of Temperature on the Gasification Process
- date: 2012-01-04
- words: 2064
- flesch: 50
- summary: Reactor parameters: • Capacity (in produced gas) 100 kWt • Fuel demand (consumption, requirement) 150 kWt • Wood consumption 40 kg · h−1 • Air flow rate 50 m3n · h−1 The basic fluid generator operation characteris- tics are described below: • Operation of the fluid generator – after ig- nition, the fluid generator is operated in combus- tion mode, so that its heating is quickit heats up quickly. This paper describes experiments that investigate the effect of temperature and pressure on gas composition and low calorific value.
- keywords: air; bed; biomass; calorific; chart; combustion; composition; content; dependency; effect; energy; figure; fluid; fuel; gas; gasification; generator; increase; lower; pressure; production; proportion; results; technology; temperature; value; vol
- versions: original; plain text
- ap-1574
- author: Balcau, Monica; Plesa, Angela; Opruta, Dan
- title: Contributions to the Study of Dynamic Absorbers, a Case Study
- date: 2012-01-04
- words: 1992
- flesch: 62
- summary: Figure 1: Mechanical system This case starts from the differential equation sys- tem governing the torsional vibrations created by the mechanical system presented in Figure 2: m1 d2a1 dt2 + c12(a1 − a2) = 0 m2 d2a2 dt2 + c12(a2 − a1) + c23(a2 − a3) = 0 Figure 2: Equivalent mechanical system The relative linear elongations (displacement) ai measured on the reduced circle of radius r (of the vibrations of the four reduced masses) are expressed in relation to the linear amplitudes Ai:
- keywords: absorber; c12; dt2; dynamic; figure; l l; mass; masses; mechanical; order; reduced; system; vibrations; x2ω20
- versions: original; plain text
- ap-1576
- author: Banyai, Daniel; Marcu, Lucian
- title: A Flexible Adjustment and Control System for Hydraulic Machines
- date: 2012-01-04
- words: 2408
- flesch: 50
- summary: Keywords: adjustable pump, control system, dynamic behavior. the electricity supply and control system for the proportional distributor, the sensors and the distributor to simulate the load; 5
- keywords: adjustable; adjustment; behavior; chamber; command; control; control system; controller; displacement; dynamic; electro; equations; figure; flow; hydraulic; linear; machines; model; motor; piston; power; pressure; proportional; pump; romania; signal; system; valve; variable; vol
- versions: original; plain text
- ap-1578
- author: Brázdil, Marian; Pospíšil, Jiří
- title: A Way to Use Waste Heat to Generate Thermoelectric Power
- date: 2012-01-04
- words: 1765
- flesch: 48
- summary: Only materials which possess ZT > 0.5 are re- garded as thermoelectric materials [3]. Keywords: thermoelectricity, thermoelectric generator, seebeck effect, waste heat.
- keywords: 4/2012; acta; biomass; boiler; combustion; conversion; effect; efficiency; electricity; energy; figure; fuel; gas; generator; heat; high; low; materials; merit; polytechnica; potential; power; prototype; seebeck; source; systems; temperature; thermal; thermoelectric; voltage; waste
- versions: original; plain text
- ap-1580
- author: Stunová, Barbora Bryksí
- title: Strontium As a Structure Modifier for Non-binary Al–Si Alloy
- date: 2012-01-04
- words: 3525
- flesch: 56
- summary: [2,5] that the mor- phology of iron intermetallic phases can be influenced by adding strontium. Oc- casionally there are skeletal particles of magnesium phase Mg2Si, always tied to the eutectic silicon or iron phase.
- keywords: addition; agent; alloy; alsr10; aluminum; binary; cast; cavities; changes; coarse; defects; effect; eutectic; figure; formations; gas; influence; intermetallic; iron; magnesium; manganese; mg2si; modification; modified; morphology; non; nucleation; phases; porosity; pure; samples; shrinkage; silicon; skeletal; strontium; structure; vol
- versions: original; plain text
- ap-1582
- author: Čermáková, Jiřina; Mrázek, Jakub; Fliegerová, Kateřina; Tenkrát, Daniel
- title: Replacing Natural Gas by Biogas — Determining the Bacterial Contamination of Biogas by PCR
- date: 2012-01-04
- words: 3143
- flesch: 51
- summary: Most of the biogas that is produced comes from treated sewage sludge and biogas plants, and these systems do not contain a pasteurization step. Proteobacteria; Alphaproteobacteria Decompose polysaccharide, can cause infection SB Lactobacillus fermentum 98 Firmicutes; Lactobacillales Produce lactic acid, can cause infection SB Uncultured Lachnospiraceae bacterium 98 Firmicutes; Clostridia – SB, SW Uncultured Bacteroidetes clone 100 Bacteroidetes Produce propionic, lactic and acetic acid, can cause infection B1W, NG Uncultured clostridium clone 36 Firmicutes, Clostridia – B2W Leucobacter 100 Actinobacteria; Actinobacteridae – SB Uncultured Bacteroidetes bacterium 95 Bacteroidetes Produce propionic, lactic and acetic acid, can cause infection NG Uncultured clostridiales bacterium 100 Firmicutes, Clostridia – B1W, B2W, BB, SW, SB, NG E. coli 100 Proteobacteria; Gammaproteobacteria From intestinal micro-flora, can cause toxins NG Staphylococcus sp. 100 Firmicutes; Bacili Very adaptable pathogen B1W, B2W, NG Pseudomonas fluorescens 99 Proteobacteria; Gammaproteobacteria Reduce nitrate, opportunistic pathogen SW Candidatus Nitrospiradefluvii 99 Nitrospirae; Nitrospira Reduce nitrate SA Column S for percentage similarity of closest sequence in GenBank B1W biogas behind the digester from waste water treatment B2W biogas behind the adsorption unit from waste water treatment BB biogas from biogas plant SW sludge from waste water treatment SB substrate from biogas plant NG natural gas 35 Acta Polytechnica Vol.
- keywords: 4/2012; acta; adsorption; anaerobic; b1w; b2w; bacterial; bacteria·m−3; biogas; biomethane; corrosion; czech; digester; digestion; distribution; energy; firmicutes; grid; heat; methods; microbial; microorganisms; molecular; natural; natural gas; number; pcr; plant; polytechnica; present; process; republic; samples; sludge; species; substrate; table; total; treatment; uncultured; unit; use; vol; waste; water
- versions: original; plain text
- ap-1584
- author: Čermáková, Jiřina; Doucek, Aleš; Polák, Lukáš
- title: Energy Accumulation by Hydrogen Technologies
- date: 2012-01-04
- words: 1879
- flesch: 55
- summary: This discordance between energy production and energy utilization can be dealt with by hydrogen accumulation. • Longer-term lack of energy production due to unfavourable weather conditions; basically this period is not longer than 7–10 days.
- keywords: cell; consumption; electricity; electrolyzer; energy; figure; fuel; household; hybrid; hydrogen; immediate; model; panels; photovoltaic; plants; power; pressure; production; results; simulation; storage; system; tank
- versions: original; plain text
- ap-1586
- author: Demianová, Kristína; Ožvold, Milan; Turňa, Milan
- title: Application of Induction Heating for Brazing Parts of Solar Collectors
- date: 2012-01-04
- words: 1881
- flesch: 63
- summary: 52 No. 4/2012 a) 2.26 kW, 35 s, FL10 b) 2.9 kW, 18 s, FL10 c) 2.6 kW, 25 s, FL10 d) 2.6 kW, 25 s, FL10 Figure 3: Brazed joints fabricated with various parameters a) 2.6 kW, 26 s, Nocolok b) 2.6 kW, 28 s, FL20 c) 2.69 kW, 24 s, FL20 Figure 4: Brazed joints fabricated with various parameters 2.6 kW, 26 s, FL20 Figure 5: Macrostructure of the brazed joint of specimen P6 with a detail of the microstructure cal melting of the flange at brazing time 18 s. A se- ries of brazed joints were fabricated with three types of fluxes (Nocolok, BrazeTec F32/80 and BrazeTec F30/70) and the AlSi12brazing alloy type.
- keywords: alloy; brazetec; brazing; coil; collectors; figure; flange; flux; heating; induction; joint; materials; melting; nocolok; parameters; parts; polytechnica; power; solar; suitable; surface; technology; time; type; vol
- versions: original; plain text
- ap-1588
- author: Dlouhý, Tomáš; Dupal, Tomáš; Dlouhý, Jan
- title: A Pulverized Coal-Fired Boiler Optimized for Oxyfuel Combustion Technology
- date: 2012-01-04
- words: 3231
- flesch: 59
- summary: • Enter the connection order of – Water and steam – Flue gas – Air • Define the heat transfer from flue gas to wa- ter/steam/air. According to generally presented recommendations, backed up by our own calculations, a 70 % flue gas recycling ra- tio is considered (i.e. approximately twice the amount of flue gas that forms).
- keywords: 4/2012; acta; air; boiler; co2; coal; combustion; conditions; design; economizer; figure; flow; flue; flue gas; gas; heating; lower; model; modifications; new; order; outlet; output; oxyfuel; oxygen; oxygen combustion; plant; polytechnica; rate; recycling; reference; reheater; size; span; steam; superheater; surface; technology; temperature; vol; water
- versions: original; plain text
- ap-1590
- author: Goliaš, Marcel; Palenčár, Rudolf
- title: Determination of Uncertainties for Correlated Input Quantities by the Monte Carlo Method
- date: 2012-01-04
- words: 1572
- flesch: 52
- summary: Figure 2 shows the probability density functions and the frequency distributions (histograms) of the rectangle obtained by the distribution propagation by Monte Carlo simulation for the three correlation coef- ficients. Keywords: uncertainty of measurement, Monte Carlo method, correlation.
- keywords: carlo; correlation; density; distribution; input; measurement; method; model; monte; output; probability; propagation; quantities; quantity; simulation; uncertainties; uncertainty
- versions: original; plain text
- ap-1592
- author: Grepl, Martin; Pagáč, Marek; Petrů, Jana
- title: Laser Cutting of Materials of Various Thicknesses
- date: 2012-01-04
- words: 2312
- flesch: 65
- summary: 52 No. 4/2012 Table 5: Laser cutting velocities with 80 % power Number of cut Velocities of laser cutting [mm · min−1] Cut 8a 500 Cut 8b 600 Cut 8c 400 Cut 8d 300 Cut 8e 450 Figure 6: The cuts of variable cutting velocity with constant power 80 % Cuts nos. Figure 1: Principle of laser cutting 62 Acta Polytechnica Vol.
- keywords: 4/2012; acta; alloy; cut; cuts; cutting; delta; figure; gas; laser; material; metal; min−1; nos; output; parameters; polytechnica; power; process; quality; recast; source; speed; suitable; system; thickness; view; vol
- versions: original; plain text
- ap-1594
- author: Janásek, Adam; Čep, Robert; Brychta, Josef
- title: Checking the Geometric Accuracy of a Machine Tool for Selected Geometric Parameters
- date: 2012-01-04
- words: 2716
- flesch: 73
- summary: References [1] ISO 10791-2 – Test conditions for machine cen- tres — Part 2: Geometric tests for machines with vertical spindle or universal heads with vertical primary rotary axis (vertical Z-axis). [5] ISO 10791-1 – Test conditions for machine cen- tres — Part 1: Geometric tests for machines with horizontal spindle and with accessory heads (hor- izontal Z-axis).
- keywords: axis; distance; figure; geometric; machine; measured; measurement; milling; scheme; spindle; standard; table; terms; test; value
- versions: original; plain text
- ap-1596
- author: Janovec, Jiří; Poláchová, Daniela; Junek, Michal
- title: Lifetime Assessment of a Steam Pipeline
- date: 2012-01-04
- words: 2269
- flesch: 60
- summary: Another topic for research is the design of checks on the service life of steam pipelines in the area of creep damage and damage assessment of the mi- crostructures of grade 15 steels and the new class of T23, T24, P91, P92 and E911 steels. 78 Acta Polytechnica Vol. Keywords: life assessment of a steam pipeline, creep damage, assessment of microstructure damage.
- keywords: 4/2012; acta; assessment; cavitation; cavities; class; creep; czech; damage; figure; hours; hrs; joints; life; lifetime; material; method; microstructure; min; mpa; necessary; operating; parameters; pipeline; piping; plants; polytechnica; power; service; stage; states; steam; steel; table; tests; type; vol
- versions: original; plain text
- ap-1598
- author: Jusko, Ondrej
- title: New Abrasive Materials and Their Influence on the Surface Quality of Bearing Steel After Grinding
- date: 2012-01-04
- words: 1390
- flesch: 63
- summary: This situation provided the moti- vation to seek a new direction in the development of grinding wheels, and to investigate a type of grind- ing wheel with an innovative abrasive material. A 99A 60J 9V grinding wheel was used.
- keywords: abral; abrasive; al2o3; bearing; cbn; conventional; cycle; figure; grains; grinding; high; influence; material; min; new; results; roughness; roundness; steel; surface; wheel
- versions: original; plain text
- ap-1600
- author: Kolařík, Ladislav; Kolaříková, Marie; Kovanda, Karel; Pantůček, Marek; Vondrouš, Petr
- title: Advanced Functions of a Modern Power Source for GMAW Welding of Steel
- date: 2012-01-04
- words: 2594
- flesch: 68
- summary: Developments in modern microelectronics have led to rapid advances in welding sources. Research and development carried out by manufacturers of welding sources focuses on rapid optimal control of the welding parameters dur- ing welding.
- keywords: arc; control; current; evolution; faces; figure; function; gmaw; heat; iac; input; layer; lower; metal; migatronic; parameters; position; process; repeat; root; sample; sequence; short; source; spatter; standard; table; time; transfer; vertical; voltage; welding
- versions: original; plain text
- ap-1602
- author: Kupec, Tomáš; Hlavačová, Ivana; Turňa, Milan
- title: Metallurgical Joining of Magnesium Alloys by the FSW Process
- date: 2012-01-04
- words: 1393
- flesch: 58
- summary: 1 % Nital Figure 5: Microstructure of weld metal, etch. The measured microhardness values in the base metal, HAZ and weld metal did not differ consider- ably.
- keywords: 4/2012; acta; alloy; base; boundary; equipment; figure; friction; fsw; institute; magnesium; materials; metal; microhardness; parameters; phase; pin; polytechnica; process; stir; technology; tool; vol; welding
- versions: original; plain text
- ap-1604
- author: Laska, Mateusz; Kazior, Jan
- title: Influence of Various Process Parameters on the Density of Sintered Aluminium Alloys
- date: 2012-01-04
- words: 1358
- flesch: 53
- summary: The results showed that the green density increases with compaction pressure, but that sintered density is independent of green density (compaction pressure) for each sintering temperature. Figure 2 presents the relationship between sintered density and com- paction pressure for different sintering temperatures.
- keywords: alloys; aluminium; compaction; compacts; densification; density; different; ea231; ea321; factor; figure; function; green; powders; pressure; samples; silicon; sintered; sintering; specimens; theoretical
- versions: original; plain text
- ap-1606
- author: Marcu, Ioan-Lucian; Banyai, Daniel-Vasile
- title: Fundamental Research on Hydraulic Systems Driven by Alternating Flow
- date: 2012-01-04
- words: 2089
- flesch: 46
- summary: 52 No. 4/2012 Fundamental Research on Hydraulic Systems Driven by Alternating Flow Ioan-Lucian Marcu1, Daniel-Vasile Banyai1 1 Technical University of Cluj-Napoca, Department of Mechanical Engineering, B-dul Muncii Nr. 103-105 Cluj-Napoca Romania Correspondence to: Lucian.Marcu@termo.utcluj.ro Abstract This paper presents a new approach to rotary hydraulic systems, and the functional principles of rotary hydraulic systems that can work using alternating flows. Hydraulic transmissions using alternating flows are based on bidirectional displacement of a predefined volume of fluid through the connection pipes between the alternating flow, the pressure energy generator and the motor.
- keywords: alternating; connection; drop; experimental; figure; flow; fluid; functioning; generator; hydraulic; hydraulic motor; instantaneous; max; motor; output; parameters; phase; pistons; pressure; principles; rotary; star; stroke; system; volume; way; working
- versions: original; plain text
- ap-1608
- author: Petera, Pavel
- title: Holding Pressure and Its Influence on Quality in PIM Technology
- date: 2012-01-04
- words: 1566
- flesch: 56
- summary: It can be seen from these graphic relations, which show the density across the sample, that where there was higher holding pressure the distribution of the density values was more homogeneous. Keywords: PIM, holding pressure, phase separation.
- keywords: binder; ceramic; density; different; distribution; higher; influence; injection; material; molding; necessary; pim; places; polymeric; powder; pressure; processing; quality; specimens; technology; values
- versions: original; plain text
- ap-1610
- author: Purgar, Amon; Winter, Franz
- title: Concepts of Emission Reduction in Fluidized Bed Combustion of Biomass
- date: 2012-01-04
- words: 2305
- flesch: 57
- summary: This status report focuses on the current operation of fluidized bed combustors. Various emission reduction concepts for fluidized bed combustors that are typical for their industrial sector are discussed.
- keywords: air; bed; biomass; capacity; catalytic; cleaning; combustion; combustors; communal; conversion; energy; figure; flue; fluidization; fluidized; fuel; gas; industry; material; paper; plants; pulp; reduction; sewage; sludge; system; thermal; treatment; waste
- versions: original; plain text
- ap-1612
- author: Skaloń, Mateusz; Kazior, Jan
- title: Influence of the Amount of Master Alloy on the Properties of Austenitic Stainless Steel AISI 316L Powder Sintered in Hydrogen
- date: 2012-01-04
- words: 1971
- flesch: 61
- summary: 3.3 Microhardness Figure 3 presents the results of microhardness mea- surements of sintered AISI 316L powders. The major in- crease in sintered density for 0.3 % wt. amount of boron suggests some changes in the sintering mech- anisms than when smaller lower amounts of boron were added.
- keywords: 316l; addition; aisi; austenitic; boron; density; figure; grain; hardness; influence; layer; liquid; material; metallurgy; microhardness; microstructure; porosity; powder; sintered; sintering; stainless; steel; surface; vol
- versions: original; plain text
- ap-1614
- author: Vavruška, Petr
- title: Creating a Multi-axis Machining Postprocessor
- date: 2012-01-04
- words: 2473
- flesch: 61
- summary: It is usually possible to specify the limits of machine tool axes and then during transformation the postprocessor checks the positions of the axes in the whole machine tool. Multi-axis machine tools are distinguished by their nomenclature (location of the rotary axes), and hence transformation equations can be created.
- keywords: axes; axis; cam; case; control; data; figure; file; functions; language; machine; machining; method; multi; necessary; positions; postprocessor; prague; production; program; rotary; system; tool; transformation
- versions: original; plain text
- ap-1616
- author: Zahradník, Radek
- title: The Simulation of the Influence of Water Remnants on a Hot Rolled Plate after Cooling
- date: 2012-01-04
- words: 1034
- flesch: 60
- summary: Keywords: water remnants, FEA, simulation, hot plate. This paper focuses on a numerical calculation (finite ele- ment analysis) of rolled plate deformations, and the goal is to find whether the water remnants have a significant influence on the shape of the rolled plate.
- keywords: analysis; cooling; displacement; element; field; figure; finite; heat; hot; model; plate; remnants; temperature; transfer; water
- versions: original; plain text
- ap-1618
- author: Murray-Smith, David J.
- title: An Application of the Individual Channel Analysis and Design Approach to Control of a Two-input Two-output Coupled-tanks System
- date: 2012-01-04
- words: 8757
- flesch: 57
- summary: The avail- ability of a comprehensive nonlinear model of the system, together with linearised representations ap- propriate for control system design, also makes this system suitable for the teaching of practical aspects of multi-input multi-output control system analysis and design using ICAD or other approaches. This could also illustrate the benefits of bringing together simulation and experimental testing within the processes of control system design and implemen- tation.
- keywords: 4/2012; acta; analysis; application; approach; area; axis; case; changes; channel; closed; continuous; control; control system; controller; cross; demanded; design; diagram; drain; equations; experimental; feedback; figure; flow; frequency; function; gain; horizontal; icad; individual; input; level; line; liquid; loop; magnitude; methodology; methods; model; multivariable; nonlinear; operating; output; paper; performance; phase; plant; point; polytechnica; process; reference; results; robustness; shows; similar; simulation; simulation results; single; small; step; structure; system; tank; terms; test; time; transfer; use; values; vol
- versions: original; plain text
- ap-1620
- author: Bauer, Jan
- title: Simulation of a Matrix Converter Fed Drive With Sliding Mode Control
- date: 2012-01-05
- words: 4331
- flesch: 63
- summary: Let us to investigate the existence condition for sliding mode torque control. There will always be one vector Figure 7: Principle of sliding mode torque control.
- keywords: 5/2012; acta; algorithm; amplitude; analysis; approach; available; circuit; control; controller; converter; current; drive; equivalent; fig; figure; flux; frequency; induction; input; inverter; link; machine; matrix; mode; modulation; motor; order; output; paper; phase; polytechnica; power; sliding; space; state; switches; switching; system; target; time; torque; torque control; value; variables; vector; virtual; voltage; voltage vector
- versions: original; plain text
- ap-1622
- author: Beniak, Juraj; Ondruška, Juraj; Čačko, Viliam
- title: Design Process of Energy Effective Shredding Machines for Biomass Treatment
- date: 2012-01-05
- words: 2133
- flesch: 61
- summary: However, it is also necessary to design an experiment for other types of materials and for other subsidiary parameters that can affect the process of material disintegration, and thus increase the energy consumed in these processes (by these devices). [6] shows the impact of moisture on the shear strength of pine and spruce wood material.
- keywords: angle; design; device; disintegrative; energy; experiment; face; figure; force; impact; input; machinery; machines; material; moisture; moment; necessary; parameters; plan; power; process; selected; shredding; tool; torque; values; vol; wedge; wood
- versions: original; plain text
- ap-1624
- author: Brabec, Jiří; Helmich, Martin
- title: Development of an Ultralight with a Ducted Fan
- date: 2012-01-05
- words: 3207
- flesch: 58
- summary: Keywords: available thrust, required thrust, propulsion, ducted fan. These character- istics are represented by values called available thrust, i.e. the thrust that the plane can use for a specific flight speed, and the required thrust for the plane drag.
- keywords: aerodynamic; aircraft; airplane; available; bed; category; characteristics; design; development; device; drag; engine; fan; figure; fuselage; maximum; measured; necessary; outlet; plane; power; power unit; problems; propeller; propulsion; propulsion unit; required; speed; system; tests; theoretical; thrust; tunnel; ultralight; unit; values; weight; work
- versions: original; plain text
- ap-1628
- author: Černek, Petr; Brejcha, Michal; Hájek, Jan; Pígl, Jan
- title: A Comparison of Power Quality Controllers
- date: 2012-01-05
- words: 2047
- flesch: 65
- summary: FACTS: modelling and sim- ulation in power networks. In recent decades, power quality has become topic number one.
- keywords: active; ahf; analysis; buildings; controllers; distribution; disturbances; equipment; factor; figure; filter; harmonic; important; load; network; paper; phase; power; quality; reactive; shunt; solution; stability; suitable; supply; system; voltage
- versions: original; plain text
- ap-1630
- author: Černý, Viktor
- title: Energy Estimation of Distributed Phase-shift Beamforming
- date: 2012-01-05
- words: 6194
- flesch: 69
- summary: In order to prevent this situation, we can install batteries with higher capacities at the relays, or we can increase the num- ber of relay modules. M modules per cluster.
- keywords: 5/2012; acknowledgement; acta; antenna; axis; beamforming; broadcasts; case; cd2(1; classic; cluster; communication; constant; data; device; distance; emod; end; energy; etot; fig; figure; frequency; method; modules; multiple; network; number; order; packets; paper; phase; polytechnica; power; receiver; relay; repeater; results; shift; signal; single; size; step; t)d2; time; total; transmission; vol
- versions: original; plain text
- ap-1634
- author: Grünwald, Ondrej
- title: Model of Customer Buying Behavior in the CZ Mobile Telecommunication Market
- date: 2012-01-05
- words: 6800
- flesch: 64
- summary: Price level was clearly the most common considera- tion that was chosen as the must-avoid level. 52 No. 5/2012 C o u n t o f ta ri ff s 268 251 239 228 216 201 181 166 150 135 121 112 100 84 65 58 51 40 35 29 22 16 11 6 1 Price [CZK] 3 2 5 0 3 0 2 0 2 9 1 0 2 8 1 0 2 7 1 0 2 6 1 0 2 5 1 0 2 4 1 0 2 3 1 0 2 2 1 0 2 1 1 0 2 0 1 0 1 9 1 0 1 8 1 0 1 7 1 0 1 6 1 0 1 5 1 0 1 4 1 0 1 3 1 0 1 2 1 0 1 1 1 0 1 0 1 0 9 1 0 8 1 0 7 1 0 6 1 0 5 1 0 4 1 0 3 1 0 2 1 0 1 1 0 Page 1 Figure 8: Distribution of tariff prices in screening sections.
- keywords: acbc; analysis; attribute; byo; choice; concepts; conjoint; customer; czk; data; e c; e n; e t; estimation; figure; individual; levels; lump; m b; m s; market; minutes; mobile; model; míru; n s; n t; n u; new; number; operator; price; product; r e; respondent; s u; sawtooth; screening; section; services; set; share; sms; step; student; sum; table; tariff; te s; u m; u t; u te
- versions: original; plain text
- ap-1636
- author: Halupka, Ivan; Kollár, Ján; Pietriková, Emília
- title: A Task-driven Grammar Refactoring Algorithm
- date: 2012-01-05
- words: 4877
- flesch: 47
- summary: This paper also briefly introduces the reader to processes occurring in grammar refactoring, a method for describing desired properties that a refactored grammar should fulfill, and there is a discussion of the overall significance of grammar refactoring. The problem is that grammar refactoring is in many cases a non-trivial task, and if done manually it is prone to errors, especially in the case of larger grammars.
- keywords: algorithm; approach; automated; basis; chain; command; commandsequence; context; corresponding; creation; development; entity; equivalent; evolution; expression; free; function; generation; grammar; grammar population; grammar refactoring; ident; initial; instance; language; left; martinica; number; objective; objective function; order; parameters; phase; population; procedure; process; processes; random; refactoring; refactoring process; sequence; size; specific; step; task; test; value; work
- versions: original; plain text
- ap-1638
- author: Henychová, Petra; Hiřmanová, Klára; Vraný, Martin
- title: Diamond Films for Implantable Electrodes
- date: 2012-01-05
- words: 2432
- flesch: 61
- summary: [3] P. W. May, W. J. Ludlow, M. Hannaway, et al. Raman and conductivity studies of boron-doped microcrystalline diamond, faceted nanocrystalline diamond and cauliflower diamond films. In this paper, we focus on optimizing the growth of thin diamond films by plasma-enhanced microwave chemical vapor deposition.
- keywords: afm; boron; chemical; cm−1; conditions; deposition; diamond; doping; electrodes; films; growth; high; highest; implantable; intensity; level; low; material; method; ncd; peak; quality; raman; rate; resistance; sample; size; spectra; spectroscopy; substrate; surface; temperature; thickness
- versions: original; plain text
- ap-1644
- author: Náhlík, Josef; Janoušek, Michal; Šobáň, Zbyněk
- title: Gated Graphene Electrical Transport Characterization
- date: 2012-01-05
- words: 1765
- flesch: 62
- summary: Water molecules behave as doping atoms, because the gate voltage affects their polarization and they add their own electric field intensity to the intensity caused by the Figure 2: Scheme of the polarization of water molecules by gate voltage in backgated graphene. Polarized molecules and their electric intensity could be one of the effects that cause hysteresis be- tween the forward and backward sweep of gate voltage in the resistivity/gate voltage characteristic.
- keywords: applied; backward; behavior; carbon; characteristics; electrical; fig; figure; forward; gate; graphene; high; hysteresis; interesting; layer; material; method; molecules; resistivity; samples; second; silicon; speed; substrate; sweep; temperature; transparent; transport; voltage
- versions: original; plain text
- ap-1648
- author: Schneider, Dorian
- title: Control Algorithms for Large-scale Single-axis Photovoltaic Trackers
- date: 2012-01-05
- words: 4000
- flesch: 67
- summary: This fact is exploited to further simplify the subsequent calculations: A variable δ is introduced, according to: δ = { +1 sun is in the east, i.e. ψη ∈ ]0◦, 180◦], −1 sun is in the west, i.e. ψη ∈ ]−180◦, 0◦]. [h] an g le [° ] backtracking backtracking tracking + backtracking optimal tracking sun azimuth sun elevation Figure 5: Tracking and backtracking angles, sun azimuth and elevation plotted for January 1st, 2012 in Berlin.
- keywords: 5/2012; acta; alignment; angle; axis; azimuth; backtracking; control; cos; elevation; extra; fig; figure; free; location; module; optimal; photovoltaic; plane; polytechnica; position; power; results; rotation; sat; sats; section; shading; shadow; sin; single; solar; sun; surface; system; tilt; tracker; tracking; vector; west; yield; ;
- versions: original; plain text
- ap-1650
- author: Selecký, Martin; Meiser, Tomáš
- title: Integration of Autonomous UAVs into Multi-agent Simulation
- date: 2012-01-05
- words: 3584
- flesch: 55
- summary: In this paper we present solutions to the problems that we had to deal with in the process of integrating two hardware UAVs into an existing multi-agent simulation system with additional virtual UAVs, resulting in a mixed reality system where hardware UAVs and virtual UAVs can co-exist, coordinate their flight and cooperate on common tasks. Hardware UAVs are capable of on-board planning and reasoning, and can cooperate and coordinate their movement with one another, and also with virtual UAVs.
- keywords: 5/2012; acta; agent; agent system; agentfly; aircraft; autonomous; autopilot; avoidance; bandwidth; board; collision; communication; computer; connected; control; cooperative; coordinate; curves; distance; error; exchange; figure; flight; gps; ground; hardware; kestrel; mechanisms; multi; planning; plans; polytechnica; position; range; real; safety; section; simulated; simulation; system; telemetry; time; trajectory; turn; uavs; virtual; vol; wind
- versions: original; plain text
- ap-1652
- author: Spohner, Milan
- title: A Study of the Properties of Electrical Insulation Oils and of the Components of Natural Oils
- date: 2012-01-05
- words: 2002
- flesch: 54
- summary: Keywords: conductivity, density, dielectric constant, FAME, insulating oil, lauric acid, loss number, methyl ester, midel, oleic acid, rapeseed oil, stearic acid, transformer oil, vegetable oil, vibratory viscometer, viscosity. 2.2 Dielectric properties For a study of dielectric properties, samples of FAME and rapeseed oil methyl ester were selected for a com- parison with the two fatty acids found in rapeseed oil.
- keywords: acid; activation; agilent; conductivity; density; dependence; dielectric; electrical; energy; ester; fame; figure; frequency; kmol−1; liquid; loss; methyl; midel; mineral; natural; number; oil; oils; oleate; parameters; properties; rapeseed; temperature; transformer; values; viscosity
- versions: original; plain text
- ap-1654
- author: Turoň, Václav
- title: A Study of Parameters Setting of the STADZT
- date: 2012-01-05
- words: 3305
- flesch: 60
- summary: 52 No. 5/2012 600 1200 10 20 30 40 50 60 600 1200 10 20 30 40 50 60 75 150 10 20 30 40 50 60 75 150 10 20 30 40 50 60 19 38 10 20 30 40 50 60 19 38 10 20 30 40 50 60 9 19 10 20 30 40 50 60 9 19 10 20 30 40 50 60 a) Time index[−] b) Time index[−] c) Time index[−] d) Time index[−] k [− ] k [− ] k [− ] k [− ] e) Time index[−] f) Time index[−] g) Time index[−] h) Time index[−] k [− ] k [− ] k [− ] k [− ] 0 0 0 0 0 0 0 0 Figure 4: STADZT zolograms created by window length 128 samples and various overlap a) 127 samples ∼ 99 % overlap, b) 120 samples ∼ 93 % overlap, c) 96 samples ∼ 75 % overlap, and d) 64 samples ∼ 50 % overlap. STFT spectrograms created by window length 128 samples and various window shape: e) 127 samples ∼ 99 percent overlap, f) 120 samples ∼ 99 % overlap, g) 96 samples ∼ 75 % overlap, and h) 64 samples ∼ 99 % overlap.
- keywords: analysed; analysis; basis; coefficients; figure; fourier; frequency; frequency resolution; function; index[−; information; length; non; overlap; paper; parameters; polynomials; processing; resolution; samples; segmentation; shape; signal; spectral; stadzt; stationary; stft; time; time index[−; time resolution; transform; window; zolotarev
- versions: original; plain text
- ap-1656
- author: Visioli, Antonio
- title: Research Trends for PID Controllers
- date: 2012-01-05
- words: 4554
- flesch: 58
- summary: Keywords: PID controllers, design, tuning, control structures. PID controllers are still a very active field of research, because it is recognized that they are often poorly tuned in industrial applications, and the performance that is achieved can be improved many times by using a more effective design technique for the PID-based control system.
- keywords: acta; action; applications; assessment; automatic; control; controllers; dead; derivative; design; disturbance; effective; engineering; error; event; feedforward; following; fractional; hägglund; ifac; industrial; integral; journal; load; new; order; parameters; particular; performance; pid; pid controllers; point; polytechnica; practical; practice; proceedings; process; process control; processes; proportional; research; response; rules; set; signal; step; structures; suitable; system; techniques; time; tuning; unit; value; visioli; vol
- versions: original; plain text
- ap-1658
- author: Votava, Ondřej
- title: A Network Simulation Tool for Task Scheduling
- date: 2012-01-05
- words: 4297
- flesch: 66
- summary: Keywords: task scheduling, DAG scheduling, simulation, network simulation. (2) 2.1 Scheduling algorithms The problem of task scheduling is claimed to be NP- complete [21, 7] and therefore intensive research in heuristics has been done.
- keywords: acta; algorithms; application; bps; communication; computation; computer; computing; conference; data; delay; differences; distributed; dynamic; execution; expected; figure; gbit; graph; heterogeneous; heuristics; idea; international; limited; model; network; new; nodes; omnet++; order; paper; parallel; polytechnica; problem; proceedings; properties; real; results; schedule; scheduling; set; simulation; specific; static; structure; systems; task; testing; time; tool; vol
- versions: original; plain text
- ap-1660
- author: Weyer, Sören; Röthlingshöfer, Lisa; Walter, Marian; Leonhardt, Steffen
- title: Evaluation of Bioelectrical Impedance Spectroscopy for the Assessment of Extracellular Body Water
- date: 2012-01-05
- words: 3176
- flesch: 56
- summary: For -2ó +2ó Mean of fluid balance and BIS ECF [ ] l D if fe re n c e b e tw e e n f lu id b a la n c e a n d B IS E C F [ l ] 0 0.5 1 1.5 2 2.5 3 3.5 4 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 Figure 5: Bland-Altman plots illustrating the small- est and greatest difference between the changes in extracellular body fluid (ECF) estimated by BIS and the logged fluid balance plotted against the mean of the two methods. 1 Introduction Maintenance of a constant volume and stable composi- tion of body fluids is essential for homeostasis.
- keywords: 5/2012; acta; animal; balance; bioelectrical; bioimpedance; bis; blood; body; circuit; clinical; cole; conductive; current; dispersion; ecmo; electrical; experiment; extracellular; extracellular fluid; figure; fluid; frequencies; hanai; impedance; infusion; journal; khz; measurement; medium; membrane; methods; model; nonconductive; parallel; parameters; physiological; pig; pigs; polytechnica; possible; resistance; resistivity; specific; spectroscopy; status; suspension; tissue; volume; water; weight
- versions: original; plain text
- ap-1664
- author: Závodná, Michaela
- title: The Electrification of Tramways in Ostrava in 1900–1901
- date: 2012-01-05
- words: 1617
- flesch: 66
- summary: Electric trams were to be put into operation in Ostrava in October 1900 3 Municipal involvement Although the municipal authorities knew about the tram electrification, because the municipality itself was a shareholder in Mährisch-Ostrauer Elektrizitäts- Aktien-Gesellschaft and some members of the mu- nicipal self-government held shares in Brünner Loka- leisenbahngesellschaft, the municipal self-government itself did not attempt to municipalize the network of electric tramways in Ostrava.
- keywords: amo; brünner; company; economic; electricity; electrification; fund; ganz; inv; lokaleisenbahngesellschaft; moravská; municipal; new; ostrava; power; proceedings; public; schuckert; smmd; steam; trams; tramways; transport; werke
- versions: original; plain text
- ap-1666
- author: Kratochvíl, Jan; Kružík, Martin
- title: Energetic Approach to Large Strain Gradient Crystal Plasticity
- date: 2012-01-06
- words: 3845
- flesch: 72
- summary: t ∈ [0, 1]. ∈ Ω } .
- keywords: 6/2012; acta; approach; crystal; deformation; density; dissipation; domain; elastic; energetic; energy; evolution; existence; finite; forces; fp,∇fp; framework; gradient; gurtin; independent; internal; materials; mech; mielke; model; p,∇p; phys; plasticity; polytechnica; problem; q(t; rate; results; slip; solution; strain; system; theory; time; variables; y(t),z(t
- versions: original; plain text
- ap-1668
- author: Demo, Pavel; Sveshnikov, Alexey; Hošková, Šárka; Ladman, David; Tichá, Petra
- title: Physical and Chemical Aspects of the Nucleation of Cement-Based Materials
- date: 2012-01-06
- words: 3624
- flesch: 58
- summary: Possible connections with the corresponding properties for cement paste are discussed. Keywords: cement paste, induction period, calcium concentration, nucleation rate, time lag.
- keywords: 6/2012; acta; barrier; ca2; calcium; cement; cement paste; cluster; concentration; concrete; corresponding; critical; czech; energy; figure; formation; growth; hydrating; hydration; hypothesis; induction; initial; ions; lag; membrane; method; nucleation; paste; period; phase; polytechnica; portlandite; process; rate; republic; size; solution; stage; steady; supersaturation; surface; system; time; volume; water
- versions: original; plain text
- ap-1670
- author: Šmilauer, Vít; Hlaváček, Petr; Padevět, Pavel
- title: Micromechanical Analysis of Cement Paste with Carbon Nanotubes
- date: 2012-01-06
- words: 3952
- flesch: 65
- summary: There are controversial results for cement paste with admixed CNT up to 500 µm in length. [3, 19] and specifically for cement pastes [2, 4, 5, 9, 12].
- keywords: 6/2012; acta; carbon; cement; chm; clinker; clustering; clusters; cnf; cnt; composites; compressive; concrete; damage; distribution; energy; experimental; fibers; figure; flexural; fracture; grains; hydration; increase; length; mass; material; micromechanical; microstructure; mpa; nanotubes; paste; plain; polytechnica; properties; reinforcement; results; simulations; small; specimens; strain; strength; surface; table; tensile; uniform; volume; water
- versions: original; plain text
- ap-1672
- author: Nežerka, Václav; Zeman, Jan
- title: A Micromechanics-Based Model for Stiffness and Strength Estimation of Cocciopesto Mortars
- date: 2012-01-06
- words: 5048
- flesch: 69
- summary: These include estimates of the effective ther- mal conductivity of rubber-reinforced cement compos- ites [31], elasticity predictions for early-age cement [5] or alkali-activated [35] pastes, upscaling the compres- sive strength of cement mortars [26], and multi-scale simulations of three-point bending tests of concrete specimens [34]. Although these limi- tations have been overcome with the use of Portland cement in the last 50 years, lime mortars still find use in the restoration of historic structures.
- keywords: 6/2012; acta; available; brick; building; cement; coating; cocciopesto; concentration; concrete; construction; crushed; data; deviatoric; dil; dilute; e.g.; effect; elastic; estimates; experimental; factors; fig; figure; g(ik+1; gel; individual; influence; itz; lime; materials; matrix; mechanical; micromechanics; model; mori; mortars; order; overall; particles; phase; pichler; polytechnica; porosity; predictions; properties; r=1; representation; research; results; sand; scheme; section; stiffness; strength; stresses; tanaka; transition; vol; volume; volumetric; zaoui; zone
- versions: original; plain text
- ap-1674
- author: Rypl, Daniel; Bým, Tomáš
- title: Geometrical Modeling of Concrete Microstructure for the Assessment of ITZ Percolation
- date: 2012-01-06
- words: 6589
- flesch: 51
- summary: This paper deals with geometrical modeling of the concrete microstructure using realistic shapes of aggregate particles, the geometry of which is represented in terms of spherical harmonic expansion. In this continuum model, each randomly-placed 38 Acta Polytechnica Vol. 52 No. 6/2012 aggregate particle is surrounded by a shell of constant thickness representing the ITZ.
- keywords: 6/2012; acta; aggregate; aggregate particles; algorithm; bentz; bounding; bounding box; box; case; cement; center; closest; concrete; content; d.p; distance; e.j; expansion; figure; garboczi; geometrical; geometry; hard; harmonic; individual; integration; interfacial; intersection; itz; journal; level; material; microstructure; model; number; numerical; order; packing; particle; paste; percolation; periodic; phase; points; polytechnica; procedure; projection; properties; r(η,ϕ; refined; refined bounding; refinement; representative; representative volume; shapes; shell; single; size; spheres; spherical; starting; surface; thickness; transport; triangulation; volume; volumetric
- versions: original; plain text
- ap-1678
- author: Patzák, Bořek
- title: OOFEM — an Object-oriented Simulation Tool for Advanced Modeling of Materials and Structures
- date: 2012-01-06
- words: 4147
- flesch: 48
- summary: The implementation of individual elements is further facilitated by the library of classes representing inte- gration points, integration rules, and finite element interpolation spaces. The load balance recovery is achieved by reparti- tioning the problem domain and transferring the work (typically represented by finite elements) from one sub-domain to another.
- keywords: 6/2012; abstract; acta; adaptive; analysis; anchor; balancing; class; classes; code; concrete; corresponding; cross; design; details; different; domain; dynamic; element; elementevaluator; engineering; example; fig; figure; finite; functionality; geometry; implementation; individual; inheritance; integration; interface; load; local; material; methods; model; multiphysics; multiscale; nodes; object; oofem; optional; parallel; parent; particular; patzák; polytechnica; problem; rypl; section; services; simulation; solution; sparse; specific; step; test; vol; work
- versions: original; plain text
- ap-1680
- author: Kruis, Jaroslav; Koudelka, Tomáš; Krejčí, Tomáš
- title: Hygro-Thermo-Mechanical Analysis of a Reactor Vessel
- date: 2012-01-06
- words: 4369
- flesch: 57
- summary: The application of damage models is described in detail in [5]. Several damage models were used in the computer simulation.
- keywords: 6/2012; acta; analysis; boundary; computer; concrete; conditions; containment; creep; czech; damage; damage model; durability; equations; figure; finite; form; heat; humidity; hygro; increase; loading; local; losses; material; matrix; measurements; mechanical; model; moisture; nuclear; parameters; polytechnica; prescribed; prestress; radial; reactor; relative; results; service; situ; strength; temperature; tendon; tensile; thermo; time; transport; vapour; vessel; vol; water
- versions: original; plain text
- ap-1682
- author: Pospíšilová, Adéla; Lepš, Matej
- title: Global Optima for Size Optimization Benchmarks by Branch and Bound Principles
- date: 2012-01-06
- words: 5402
- flesch: 66
- summary: It is thus advan- tageous to decrease the upper bound on the basis of already obtained objective function values. (a) If the value of objective function m is lower than mmax, the algorithm goes to Step 2. (b) If objective function value m is greater than mmax, the value of the third variable from the end increases by one and the value of the next-to-last variable is set to its mini- mum.
- keywords: algorithm; areas; bar; benchmarks; bound; branch; constraints; continuous; cross; data; discrete; enumeration; function; global; global optimum; in2; ksi; lower; maximum; method; minimum; mmax; mmin; number; objective; objective function; optima; optimization; optimum; possible; potential; problem; programming; results; searched; sectional; set; solutions; space; step; structure; time; truss; upper; value; variables; vol; weight
- versions: original; plain text
- ap-1684
- author: Valášek, Michael; Šika, Zbynek
- title: Synthesis of Mechanisms by Methods of Nonlinear Dynamics
- date: 2012-01-06
- words: 6055
- flesch: 64
- summary: The currently used methods seem to be sufficiently powerful and able to find solutions for most problems in mechanism synthesis. The fundamental objective functions are typically constructed on the network of mechanism positions within the desired workspace.
- keywords: 6/2012; acta; angles; associated; bar; constant; constraints; coordinates; cos; design; dimensions; dissipative; dynamical; dynamics; equations; equilibrium; evolution; example; fig; figure; follows; forces; formulation; general; initial; j=1; length; lever; masses; mechanism; method; new; n∑ j=1; optimization; parameters; points; polytechnica; positions; rssr; set; simple; simulation; subsystems; synthesis; synthesized; system; task; time; transmission; values; vector; vol; yyxx; β1i;
- versions: original; plain text
- ap-1688
- author: Skalák, Zdenek
- title: The Asymptotic Properties of Turbulent Solutions to the Navier-Stokes Equations
- date: 2012-01-06
- words: 4048
- flesch: 75
- summary: Strong Lp− solutions of the Navier- Stokes equations in Rm, with applications to weak solutions, Math. Z. 187 1984, 1471–480. On optimal decay rates for weak solutions to the Navier-Stokes equations in Rn, Math. Bohem., 126, 2001, 443– 455.
- keywords: acta; besov; concentration; condition; decay; decrease; definition; energy; equations; following; frequencies; initial; l2σ; large; lim; math; miyakawa; navier; paper; rate; results; schonbek; section; solutions; space; stokes; symmetric; t)−5/4; theorem; time; turbulent; vol; weak; ‖u(t)‖2
- versions: original; plain text
- ap-1690
- author: Sváček, Petr; Horáček, Jaromír; Honzátko, Radek; Kozel, Karel
- title: Simulation of Free Airfoil Vibrations in Incompressible Viscous Flow — Comparison of FEM and FVM
- date: 2012-01-06
- words: 6136
- flesch: 66
- summary: This corresponds to the results of the numeri- cal simulations presented since the system was found stable for upstream flow velocity 35 m/s and unstable for upstream flow velocity 40 m/s in the case of FEM and 42.5 m/s in the case of FVM. Symbol D denotes the diagonal matrix D = diag(0, 1, 1), non-dimensional time is denoted by t, and the non-dimensional space coordinates are denoted by x,y. Symbols u = (u,v)T and p stand for the dimensionless velocity vector and the dimen- sionless pressure, respectively.
- keywords: -20; 6/2012; acta; aeroelastic; aeroelasticity; airfoil; ale; analysis; angle; application; approximation; axis; boundary; cells; ci(t; computations; conditions; czech; dependence; dimensional; displacement; domain; dual; element; equations; fem; figure; finite; flow; fluid; flutter; frequency; fvm; incompressible; mesh; method; motion; n+1; nonlinear; numerical; order; polytechnica; pressure; problem; profile; results; rotation; scheme; solution; stokes; structure; system; time; tn+1; upstream; vector; velocity; vertical; viscous; vol; volume; γwt
- versions: original; plain text
- ap-1698
- author: Beskin, Grigorii; Greco, Giuseppe; Oganesyan, Gor; Karpov, Sergey
- title: On Some Statistical Properties of GRBs with Measured Redshifts Having Peaks in Optical Light Curves
- date: 2013-01-01
- words: 3965
- flesch: 76
- summary: • P: optical peaks arise during the main phases of the prompt gamma-ray emission; we will refer to these as prompt optical emission. In particular, we were interested in comparing the rising phases of optical emission with simultaneous behaviour at gamma-ray wavelengths, as observed by space-borne telescopes.
- keywords: a(u; acta; activity; classes; correlations; cosmological; emission; energy; erg; events; fit; frame; gamma; grbs; light; linear; lo g; luminosity; op t; optical; parameters; peak; polytechnica; prompt; ray; −0.04; −0.09; −0.20; −0.21; −0.25
- versions: original; plain text
- ap-170
- author: Toman, J.; Černý, R.
- title: Thermal and Hygric Expansion of High Performance Concrete
- date: 2001-01-01
- words: 1437
- flesch: 57
- summary: The experimental results show that both the effect of temperature on the values of linear thermal expansion coefficients and the effect of moisture on the values of linear hygric expansion coefficients are very significant and cannot be neglected in practical applications. Keywords: concrete, linear thermal expansion, linear hygric expansion, moisture, temperature.
- keywords: changes; coefficient; concrete; czech; expansion; high; hygric; kgm; length; linear; measured; moisture; performance; samples; temperature; thermal
- versions: original; plain text
- ap-1700
- author: Giovannelli, Franco
- title: Astroparticle Physics Today
- date: 2013-01-01
- words: 10368
- flesch: 63
- summary: This enhances the efficiency of the process of mass transfer from the primary star onto the secondary collapsed star, as discussed by Giovannelli & Ziolkowski (1990) and by Giovannelli et al. (2007) in the case of A 0535+26. Giovannelli & Sabau-Graziati (2011) discussed the history of the discovery of optical indicators of high energy emission in the prototype system A0535+26/HDE 245770 ≡ Flavia’ star, updated to the March–April 2010 event when a strong optical activity occurred roughly 8 days before the X-ray out- burst (Caballero et al., 2010) that was predicted by Giovannelli, Gualandi & Sabau-Graziati (2010). Recent evidence from the Pierre Auger Observatory suggests a transition, at 5 EeV–10 EeV in the com- position of UHECRs, from protons to heavier nuclei such as iron (Abraham et al., 2010).
- keywords: abdo; acta; apj; astronomy; astroparticle; astrophysics; background; beall; behaviour; bologna; chaty; compact; composition; compositori; cosmic; cosmic rays; cosmological; dark; data; density; discovery; distribution; e.g.; ebl; eds; emission; energies; energy; energy cosmic; et al; evolution; experiments; extragalactic; fermi; fields; formation; frontier; galactic; galaxies; galaxy; gamma; gev; giovannelli; graziati; grbs; high; high energy; history; important; intensity; italian; italy; jets; knee; large; light; magnetic; mannocchi; mass; matter; measurements; mem; model; multifrequency; nature; near; neutrino; neutron; new; nuclei; objects; observations; observed; open; optical; origin; particle; particle physics; physical; physics; polytechnica; possible; problems; radiation; radio; range; ray; rays; references; reionization; results; review; sabau; society; sources; space; spectrum; star; study; systems; tev; time; uhecrs; universe; vhe; years
- versions: original; plain text
- ap-1702
- author: Hudec, René; Hudec, Lukáš
- title: Finding Hidden Treasures: Investigations in US Astronomical Plate Archives
- date: 2013-01-01
- words: 1848
- flesch: 60
- summary: 5. Suggested strategy Our suggested strategy for data mining and plate digitization in US plate archives is as follows. We report here on an ongoing investigation of US astronomical plate archives and tests of the suitability of transportable scanning devices for in situ digitization of archival astronomical plates.
- keywords: acta; archival; archives; astronomical; available; cases; collections; czech; device; difficult; digitization; example; figure; hudec; images; information; mccormick; number; numerous; observatories; observatory; osborn; photographic; plate; polytechnica; project; robbins; scientific; series; transportable; university
- versions: original; plain text
- ap-1704
- author: Hudec, René; Kopel, Fabian; Macsics, Robert; Hadwige, Markus; Heber, Ulrich; Cayé, Walter
- title: Classification of Variable Objects for Search for GRB Candidates on Bamberg Photographic Plates
- date: 2013-01-01
- words: 1978
- flesch: 54
- summary: Acta Polytechnica Acta Polytechnica 53(1):27–29, 2013 © Czech Technical University in Prague, 2013 available online at http://ctn.cvut.cz/ap/ CLASSIFICATION OF VARIABLE OBJECTS FOR SEARCH FOR GRB CANDIDATES ON BAMBERG PHOTOGRAPHIC PLATES René Hudeca,b,∗, Fabian Kopelc, Robert Macsicsc, Markus Hadwigec, Ulrich Heberd, Walter Cayéc a Astronomical Institute, Academy of Sciences of the Czech Republic, Ondřejov, Czech Republic b Cech Technical University in Prague, Faculty of Electrical Engineering, Prague, Czech Republic c Dientzenhofer Gymnasium, Bamberg, Germany d Dr Remeis Observatory, University of Erlangen, Bamberg, Germany ∗ corresponding author: rhudec@asu.cas.cz Abstract. We have re-analysed the objects recorded in 6 mea- surement books for southern sky surveys, with empha- sis on detailed investigation of non-classified objects suspected to occur only once (i.e., visible only on one plate and below the limit of other plates).
- keywords: acta; asteroids; astronomical; bamberg; candidates; catalogue; classification; classified; czech; defects; detailed; emulsion; figure; grb; high; hudec; images; jugend; non; objects; observatory; patrol; plates; project; real; size; sky; southern; stars; study; variable
- versions: original; plain text
- ap-1706
- author: Hudec, René; Petráček, Vojtěch; Šnita, Dalimil
- title: Czech Contribution to LOFT
- date: 2013-01-01
- words: 1938
- flesch: 51
- summary: Acta Polytechnica Acta Polytechnica 53(1):30–32, 2013 © Czech Technical University in Prague, 2013 available online at http://ctn.cvut.cz/ap/ CZECH CONTRIBUTION TO LOFT René Hudeca,b,∗, Vojtěch Petráčekc, Dalimil Šnitad a Astronomical Institute, Academy of Sciences of the Czech Republic, CZ-25165 Ondřejov, Czech Republic b Czech Technical University in Prague, Faculty of Electrical Engineering, Technická 2, CZ-16627 Prague, Czech Republic c Czech Technical University in Prague, Faculty of Nuclear Engineering, Břehová 78/7, CZ-11000 Prague, Czech Republic d Institute of Chemical Technology, Technická 5, CZ-16628 Prague,Czech Republic ∗ corresponding author: rhudec@asu.cas.cz Abstract. Production expertise The collaboration teams also have the following pro- duction expertise: • prototype production of SDD for the ALICE exper- iment – ICM Prague; • Post-prototyping contacts in the ON Semiconduc- tor: Roznov, Czech Republic (together with our team, the company tested double-sided technology and later succesfully produced many of the pixel detectors for the ATLAS detector at LHC); • selection and detector tests – participation in de- tector construction (Trieste and Torino); • design and production of the low voltage power supply system for ALICE SDD.
- keywords: area; available; consortium; contribution; ctu; czech; design; detector; drift; esa; expertise; eye; feroci; following; glass; hudec; institute; large; lobster; loft; mission; monitor; onboard; participation; plates; prague; production; ray; republic; sdd; silicon; space; team; technical; technology; tests; university
- versions: original; plain text
- ap-1710
- author: Karpov, Sergey; Beskin, Grigory; Bondar, Sergey; Perkov, Alexey; Ivanov, Evgeny; Guarnieri, Adriano; Bartolini, Corrado; Greco, Giuseppe; Shearer, Andy; Sasyuk, Vyacheslav
- title: Status and Perspectives of the Mini-MegaTORTORA Wide-field Monitoring System with High Temporal Resolution
- date: 2013-01-01
- words: 4448
- flesch: 57
- summary: Such studies have been performed [24, 25], but due to tech- nical limitations it has only been possible either to achieve high temporal resolution of tens of millisec- onds in monitoring of 5′–10′ fields, or to use 5–10 seconds time resolution in wider fields. For FAVOR, TORTORA and Mini-MegaTORTORA the limits correspond to 3σ detection on a single frame, and may differ from their real-time operational values due to non-ergodic pixel statistics when using the image intensifier. and classification of fast optical transients.
- keywords: acta; beskin; bondar; ccd; channel; color; complex; data; design; detection; different; et al; fast; favor; field; filters; follow; frames; grb; high; image; imaging; intensifier; karpov; kazan; light; limit; megatortora; mini; mmt; mode; monitoring; noise; objective; objects; observations; operation; optical; pixel; polarimetric; processing; real; regime; resolution; search; second; short; sky; spain; study; system; telescope; temporal; time; transients; university; variability; variant; view; wide
- versions: original; plain text
- ap-1712
- author: Opiela, Rafał; Małek, Katarzyna; Mankiewicz, Lech; Siudek, Małgorzata; Sokołowski, Marcin; Żarnecki, Aleksander Filip
- title: Photometric Analysis of Pi of the Sky Data
- date: 2013-01-01
- words: 4134
- flesch: 64
- summary: Precision dispersion of star brightness measurements from standard photometry for 200 s exposures (20 co-added frames) from the Pi of the Sky prototype at the Las Campanas Observatory in Chile. • Identification in the image by photometry with catalog stars from external star catalogs.
- keywords: acta; analysed; analysis; bad; basis; brightness; calculated; case; catalog; catalog stars; ccd; correction; dark; data; database; detector; experiment; figure; frames; good; histograms; image; large; light; line; magnitudo; measurements; med|; methods; new; object; photometry; polytechnica; procedure; project; prototype; quality; reduction; sky; stars; system; time; value; variable; |mcorr
- versions: original; plain text
- ap-1716
- author: Ulyanov, Alexei; Hanlon, Lorraine; McBreen, Sheila; Foley, Suzanne
- title: Study of Silicon Photomultipliers for the GRIPS Calorimeter Module
- date: 2013-01-01
- words: 2342
- flesch: 56
- summary: On-axis point source sensitivity versus calorimeter energy resolution (in units of the baseline resolution) for a narrow line (106 s exposure) source and a continuum GRB spectrum (1 s exposure). On-axis continuum point source sensitivity for a 106 s exposure versus transverse crystal size (left) and versus calorimeter depth resolution (right); E−2 spectrum, 0.5 MeV <
- keywords: 10×; baseline; calorimeter; compton; continuum; crystals; depth; design; detector; energy; factor; figure; gamma; grb; grips; grm; initial; kev; mev; mission; module; pair; photomultipliers; ray; readout; resolution; scintillator; sensitivity; sensl; silicon; simulations; sipm; size; source; spectrum; study; telescope
- versions: original; plain text
- ap-1718
- author: Żarnecki, Aleksander Filip; Piotrowski, Lech Wiktor; Mankiewicz, Lech; Małek, Sebastian
- title: Luiza: Analysis Framework for GLORIA
- date: 2013-01-01
- words: 2957
- flesch: 50
- summary: The Luiza analysis framework for GLORIA is based on the Marlin package, which was originally developed for data analysis in the new High Energy Physics (HEP) project, International Linear Collider (ILC). Keywords: Telescope network, image processing, data analysis.
- keywords: acta; analysis; basic; chain; class; classes; collider; computing; data; dedicated; detector; development; documentation; example; experiments; figure; file; fits; framework; gloria; ilc; image; large; linear; luiza; marlin; methods; modules; object; output; package; parameter; physics; pixel; polytechnica; processing; processor; project; reconstruction; simple; steering; step; structure; tasks; tools; user; warsaw
- versions: original; plain text
- ap-1719
- author: Bartlova, Milada; Aubrecht, Vladimir; Bogatyreva, Nadezhda; Holcman, Vladimir
- title: Multigroup Approximation of Radiation Transfer in SF6 Arc Plasmas
- date: 2013-01-02
- words: 2832
- flesch: 61
- summary: Net emission coefficients Assuming local thermodynamic equilibrium, coeffi- cient of absorption κν is related to the coefficient of emission εν by Kirchhoff’s law εν = Bνκν. Net emission coefficients of SF6 plasma with radius 0.1 cm as a function of temperature for two different cuttings of the frequency interval and various absorption means; comparison with re- sults of Aubrecht
- keywords: absorption; acta; approximation; arc; aubrecht; calculated; coefficients; cutting; emission; free; frequency; function; groups; high; isothermal; mean; method; mpa; multigroup; net; phys; planck; plasma; ptfe; radiation; results; rosseland; sf6; species; spectral; switching; temperature; transfer; values
- versions: original; plain text
- ap-172
- author: Toman, J.; Černý, R.
- title: Temperature and Moisture Dependence of the Specific Heat of High Performance Concrete
- date: 2001-01-01
- words: 1905
- flesch: 57
- summary: [Te, Ts], K is the heat capacity of the calorimeter, mw is the mass of the water, cw is the specific heat of water, Tw0 is the initial water temperature, L is the latent heat of evaporation of water, Qr is the reaction heat, �m is the mass of evaporated water, � � �m m m m m Upon adding � �Q m c
- keywords: building; calorimeter; changes; concrete; czech; dependence; dry; heat; high; kgm; mass; materials; measured; moisture; range; results; sample; size; specific; specific heat; temperature; water
- versions: original; plain text
- ap-1721
- author: Batani, Dimitri; Hulin, Sebastien; Ducret, Jean Eric; d’Humieres, Emmanuel; Tikhonchuk et al., Vladimir
- title: Development of the PETAL Laser Facility and its Diagnostic Tools
- date: 2013-01-02
- words: 4832
- flesch: 61
- summary: The first phase of PETAL commissioning (start- ing from 2015) will include characterization of laser systems and diagnostics, studies of protons, X-rays, and electrons produced in laser plasma interactions. EMP measurements performed by CEA on laser facilities: 2000-2004 LLE-Omega; 2006 LULI2000; 2007-2009 LULI-Pico2000; 2009-2010 LLE; in addition Omega EP US feedback on NIF and EMP measure- ments on TITAN National Ignition Campaign.
- keywords: acta; activation; angular; beam; bordeaux; cea; chamber; conference; construction; density; design; development; diagnostics; electron; emission; emp; energy; experiments; facilities; facility; fast; fields; figure; france; fusion; hard; high; ignition; intensity; interaction; ions; large; laser; lmj; magnetic; matter; mev; m−1; nif; omega; parabola; particles; particular; petal; petal laser; phase; physics; plasma; polytechnica; project; proton; pulse; radiation; radiography; range; rays; research; review; science; scientific; second; shock; short; solid; source; spectrometer; spectrum; system; target; tools
- versions: original; plain text
- ap-1723
- author: Bogachev, Nikolay N.; Bogdankevich, Irina L.; Gusein-zade, Namik G.; Tarakanov, Vladimir P.
- title: Computer Simulation of a Plasma Vibrator Antenna
- date: 2013-01-02
- words: 1475
- flesch: 62
- summary: Many experiments have been carried out with plasma antennas to transmit and receive signals. Keywords: computer simulation, plasma antenna, KARAT code, MMANA program.
- keywords: antenna; coaxial; code; computer; density; dipole; figure; frequency; karat; length; mda; metal; mmana; modeling; pda; physics; plasma; power; radiation; simulation; studies; vibrator
- versions: original; plain text
- ap-1725
- author: Bordusau, Siarhei; Madveika, Siarhei; Dostanko, Anatolii
- title: The Process of Plasma Chemical Photoresist Film Ashing from the Surface of Silicon Wafers
- date: 2013-01-02
- words: 2759
- flesch: 51
- summary: [1, 4, 5]. Peculiar features of microwave energy and silicon wafer interaction should be taken into consideration as well as used in developing and their processing in plasma microwave discharge. Keywords: microwave plasma, microwave plasmatron, plasma chemical ashing of photoresist.
- keywords: ashing; beginning; chamber; chemical; chemical photoresist; delay; discharge; energy; film; formation; generation; influence; investigation; microwave; microwave energy; microwave plasma; photoresist; plasma; plasma chemical; power; process; processes; rate; reaction; respect; semiconductor; silicon; silicon wafers; stage; surface; treatment; wafers; warming
- versions: original; plain text
- ap-1727
- author: Borgun, Ievgeniia V.; Azarenkov, Mykola O.; Hassanein, Ahmed; Tseluyko, Oleksandr F.; Maslov, Vasyl I.; Ryabchikovk, Dmitro L.
- title: The Formation of a Power Multi-Pulse Extreme Ultraviolet Radiation in the Pulse Plasma Diode of Low Pressure
- date: 2013-01-02
- words: 4185
- flesch: 63
- summary: Radiation energies (spike and wide pulse en- ergies) in the 12.2 ÷ 15.8 nm wavelength range as func- tions of the stored energy for the different anode di- ametres: da = 1.5, 2.5, 5.0 mm. and third half-periods is high in spite of a much lower (as compared to the first half-period) energy pump, indicates that the number of particles in the dense radiating plasma remains nearly constant for a fairly long time (approximately 6 µs). The conversion efficiency of pumped energy into radiation energy at the double layer formation (beam mechanism of plasma heating) is essentially higher in comparison with ordinary heating by current, be- cause in first case approximately all energy is pumped in very small volume.
- keywords: anode; beam; conversion; current; dense; detector; diode; discharge; discharge current; double; efficiency; electrode; electron; energies; energy; euv; extreme; figure; formation; half; heating; high; intensity; ions; layer; multi; period; plasma; power; pulse; radiation; radiation energy; range; region; second; spikes; stored; surface; tin; voltage; wavelength; wavelength range
- versions: original; plain text
- ap-1729
- author: Caniello, Roberto; Vassallo, Espedito; Cremona, Anna; Grosso, Giovanni; Dellasega, David; Canetti, Maurizio; Miorin, Enrico
- title: Growth and Physical Structure of Amorphous Boron Carbide Deposited by Magnetron Sputtering on a Silicon Substrate with a Titanium Interlayer
- date: 2013-01-02
- words: 3004
- flesch: 61
- summary: [21] A. Z. Sadek, et al. Anodization of Ti thin film deposited on ITO. [11] C. C. Klepper, et al. Amorphous boron coatings produced with vacuum arc deposition technology.
- keywords: acta; adhesion; amorphous; b4c; bare; boron; boron carbide; carbide; coatings; columnar; deposition; diffraction; effect; fig; films; growth; high; increases; interlayer; magnetron; measurements; microscopy; milan; physical; pressure; properties; roughness; scratch; silicon; solid; sputtering; stress; structure; substrate; surface; technology; temperature; thickness; thin; titanium; vacuum
- versions: original; plain text
- ap-1731
- author: Cech, Jan; Hanusova, Jana; Stahel, Pavel; Slavicek, Pavel
- title: Diffuse Coplanar Surface Barrier Discharge in Nitrogen: Microdischarges Statistical Behavior
- date: 2013-01-02
- words: 2288
- flesch: 54
- summary: From the presented data the tendency is that the substantial number of microdischarges (identi- fied as discharge current peaks) do not form new mi- crochannels but rather prolongate or branch existing discharge microchannels. Diffuse coplanar surface barrier discharge and its applications for in-line processing of low-added-value materials.
- keywords: barrier; behavior; cell; coplanar; corresponding; crossing; current; dcsbd; dielectric; discharge; electrode; fig; gap; half; high; iccd; images; incidence; input; matrices; microchannels; microdischarges; negative; nitrogen; number; peaks; period; plasma; positive; setup; surface; voltage
- versions: original; plain text
- ap-1735
- author: Cikhardt, Jakub; Klír, Daniel; Kubeš, Pavel; Kravárik, Josef; Rezác, Karel; Šíla, Ondrej; Shishlov, Alexander V.; Labetsky, Alexey Yu.
- title: The Construction of the Fast Resistive Bolometer for a SXR Measurement on the GIT-12 Facility
- date: 2013-01-02
- words: 2780
- flesch: 62
- summary: Introduction The ohmic bolometer is based on the principle of trans- formation of radiated energy into thermal energy. Shot Current Triple shell SXR energy No. (MA) Gas-puff (kJ) 1 3.73 Ne-Ne-Ne 50 2 3.55 D2-D2-D2 13 3 3.64 D2-D2-D2 22 4 2.58 D2-D2-D2 21 5 3.60 Ne-D2-D2 28 6 3.36 Ne-D2-D2 23 7 3.36 Ne-D2-D2 26 8 3.10 Ne-D2-D2 18 9 3.28 Ne-D2-D2 24 10 3.66 Ar-D2-D2 14 11 2.16 D2-D2-D2 27 Table 2.
- keywords: bolometer; characteristic; copper; current; detector; deuterium; element; energy; experiments; facility; fig; foil; gas; git-12; kinetic; material; measured; measurement; neon; power; puff; pulse; radiation; resistance; resolution; sensitive; sensitivity; shell; supply; sxr; temperature; thermal; time
- versions: original; plain text
- ap-1737
- author: Cutroneo, Mariapompea; Torrisi, Lorenzo; Ando’, Lucio; Cavallaro, Salvatore; Ullschmied, Jiri; Krasa, Josef; Margarone, Daniele; Velyhan, Andreji; Pfeifer, Miroslav
- title: Thomson Parabola Spectrometer for Energetic Ions Emitted from Sub-ns Laser Generated Plasmas
- date: 2013-01-02
- words: 2601
- flesch: 57
- summary: Several homogeneous Au samples ranging in thickness from 0.6 to 50 mi- crons were irradiated at the same experimental and geometrical conditions for laser energy, focal position and magnetic-electric deflections. The lowermost parabola corresponds to the deflected protons, while the other parabolas corresponds to Au ions with high charge states.
- keywords: acceleration; charge; density; detector; different; direction; electric; electron; energies; energy; experimental; fields; figure; forward; high; intensity; ion; ions; kinetic; laser; magnetic; maximum; mev; order; parabola; physics; plasma; prague; proton; results; spectrometer; state; target; thickness; thin; thomson; torrisi; tosca; tps
- versions: original; plain text
- ap-1739
- author: Fantova, Vladyslava; Bujaček, Karol; Kříha, Vítězslav; Julák, Jaroslav
- title: Inactivation of Candida albicans by Corona Discharge: The Increase of Inhibition Zones Area After Far Subsequent Exposition
- date: 2013-01-02
- words: 2437
- flesch: 55
- summary: The overlapping of inhibition zones was observed for the distance of 1 cm, where it was difficult to distinguish particular inhibition zones, therefore this sample was excluded from the data processing. In case of the four times exposed agars, we observed significant differences in inhibition zone areas, dependent not only on the exposition site distances, but also on the exposition order.
- keywords: agar; albicans; areas; atmospheric; candida; cap; concentration; corona; czech; decontamination; direct; discharge; dish; distance; effect; electrode; experiments; expositions; factors; far; figure; inactivation; inhibition; near; negative; order; petri; plasma; point; prague; radiation; species; subsequent; surface; treatment; university; zone
- versions: original; plain text
- ap-174
- author: Toman, J.; Černý, R.
- title: Thermal Conductivity of High Performance Concrete in Wide Temperature and Moisture Ranges
- date: 2001-01-01
- words: 1803
- flesch: 62
- summary: LS c T t x t x t x t t t � ��� � � � � , , d d 0 0 1 2 � � ��� � � � � � �� � c T t x t x t c T t x t x t t x t x t x t t , , ,, , (4) Denoting IT c T t t c T� �� �� � � �d d� � we obtain LS
- keywords: c t; concrete; conductivity; czech; dependence; fraction; heat; high; k t; kgm–3; materials; measurements; moisture; range; sand; size; t t; t �; temperature; thermal; water
- versions: original; plain text
- ap-1741
- author: Godun, Dmitriy V.; Bordusov, Sergey. V.; Dostanko, Anatoliy P.
- title: Systems of Electronic Overcurrent Protection in Pulse Power Generator Operating on Plasma Load
- date: 2013-01-02
- words: 1685
- flesch: 52
- summary: When elaborating current protection systems opti- cal systems of data transfer with the switch period up to 75 ns has been applied which ensure the reten- tion interval necessary to turn the generator off. The fast-acting complex protection system of pulse power generator is to ensure its blocking with the lapse of time not exceeding 100 nanoseconds.
- keywords: circuit; control; current; discharge; driver; electronic; generator; high; igbt; load; operating; permissible; plasma; power; protection; protection system; pulse; pulse current; system; temperature; threshold; transistors; value; voltage
- versions: original; plain text
- ap-1743
- author: Golosov, Dmitriy A.; Zavatskiy, Sergey M.; Melnikov, Sergey N.
- title: Physical and Electrical Properties of Yttria-Stabilized Zirconia Thin Films Prepared by Radio Frequency Magnetron Sputtering
- date: 2013-01-02
- words: 3427
- flesch: 64
- summary: In the present paper, the authors report the syn- thesis of YSZ thin films by RF magnetron sputtering and report the results of studying the structural and electrical properties of YSZ films. In order to form the crystalline structure, the deposited films were annealed in air over a temperature range of 700 ÷ 900 ◦C. By XRD analysis it was established that as the deposited films were amorphous, they crystallized into a pure cubic structure as a result of annealing in air at a temperature above 820 ◦C. The electrophysical properties of YSZ films were investigated on structures such as Ni/YSZ/Pt/Ti/Si and Ni/YSZ/Si.
- keywords: air; annealing; conductivity; constant; deposited; deposition; dielectric; figure; films; frequency; gas; high; ionic; loss; magnetron; min; power; properties; rate; solid; sputtering; stabilized; structures; substrates; tangent; temperature; thin; time; ysz; yttria; zirconia
- versions: original; plain text
- ap-1747
- author: Gurin, Anatolii A.; Adamenko, Andrii S.; Adamenko, Stanislav V.; Kuzmenko, Mykola M.
- title: Proton- and -radiation of the Micro-Pinch with the Boron-Containing Target
- date: 2013-01-02
- words: 4213
- flesch: 62
- summary: (This number is determined by counting the total number of proton tracks, de- flected by the magnetic field, directly in the magnet gap with an additional small 5 mm aperture at the en- trance into magnet). “Heads” of strips, its close to the pinhole axis edges, are formed by deep latent tracks of fast protons with energies from 0.6 to 1 MeV, while the continuation of the strips represented highly degraded tracks down to the bottom of track formation energy 100 keV. The images, and all of their details recorded by the pin- hole, are not snapshots of hot spot but the integral pictures without any time binding.
- keywords: acceleration; alpha; analyser; anode; average; axis; beam; boron; camera; case; current; data; dense; detectors; diode; energy; experiments; fast; field; figure; fusion; groups; heavy; helium; high; hot; hot spot; image; ions; kev; loci; magnetic; mev; micro; nuclei; number; parabola; particles; pinch; pinhole; plasma; protons; radiation; range; results; sdam; solid; spot; target; theor; thomson; time; total; tracks; values
- versions: original; plain text
- ap-1749
- author: Hlavatá, Lucie; Serbanescu, Rodica; Hlochová, Lenka; Kozáková, Zdenka; Krčma, František
- title: Pin Hole Discharge Creation in Na2SO4 Water Solutions
- date: 2013-01-02
- words: 2392
- flesch: 61
- summary: Oxidative processes occurring when pulsed high voltage discharges degrade phenol in aqueous solution. Oscilloscope Tektronix TDS 1012B operating up to 100 MHz with Tektronix P6015A high volt- age probe was used to obtain time resolved charac- teristics of discharge voltage and current with focus on the breakdown moment.
- keywords: acta; barrier; breakdown; bubble; characteristics; cm−1; conductivity; configuration; creation; current; diaphragm; dielectric; discharge; electrical; electrode; electrolyte; figure; formation; high; hole; increase; mean; moment; pin; plasma; solution; thickness; time; values; voltage; water
- versions: original; plain text
- ap-1751
- author: Horký, Miroslav
- title: Instability Growth Rate Dependence on Input Parameters During the Beam–Target Plasma Interaction
- date: 2013-01-02
- words: 2532
- flesch: 69
- summary: [ i F(0)α · eB mα + ( c2sαk 2 + ω2pα ) k · eB k2 ]} − 2∏ α=1 ω2pα k2 [ Ω2αk 2 −ω2cα (eB · k) 2 ] = 0, (3) where Ωα = ω − k · u(0)α , (4) ωcα is the cyclotron frequency, F (0) α is the Lorentz magnetic force, eB is the unit vector in the direc- tion of magnetic field and csα is the sound velocity. The two-stream instability without magnetic field is described by the well-known Buneman dispersion relation.
- keywords: buneman; cos; cs1; cs2; dependence; dispersion; field; fig; figure; instability; jet; magnetic; non; parameters; pigr; plasma; polynomial; relation; results; simulations; sin; solution; stream; value; velocity; ωc1; ωc2; ωp2
- versions: original; plain text
- ap-1753
- author: Jakubova, Ivana; Senk, Josef; Laznickova, Ilona
- title: The Influence of Nitrogen in Ar+N2 Mixture on Parameters of High-Temperature Device with Electric Arc
- date: 2013-01-02
- words: 4377
- flesch: 60
- summary: Conclusions can be useful for the design of high temperature devices operating with argon/nitrogen mixture. Similarly, Figure 7 includes the data measured for 1.6 and 8 % for variant B. Com- paring the efficiency of the device in both configura- tions, clearly better efficiency at the output of the an- ode channel for configuration B compared to configu- ration A is deteriorated by higher power loss of reac- tor 1 in variant B.
- keywords: anode; anode channel; arc; argon; cathode; channel; concentration; configuration; current; device; efficiency; figure; gas; heater; higher; individual; input; length; loss; mass; mean; measured; mixture; nitrogen; output; plasma; power; power loss; properties; pure; reaction; reactor; segment; temperature; variant; velocity; voltage; working
- versions: original; plain text
- ap-1755
- author: Kortanek, Jiri; Kubes, Pavel
- title: Calculation of the Inductance of Plasma Column at PF-1000 Device with Assumed Current Distribution
- date: 2013-01-02
- words: 2080
- flesch: 68
- summary: Inductance of shots No. 9011 and No. 9013 using plasma border detection. These constants are set for the borders to follow the places where we see a sharp rise or drop in plasma density.
- keywords: border; column; current; density; diagnostics; distribution; figure; flows; fusion; implosion; inductance; kubes; magnetic; method; neutron; pf-1000; pinch; plasma; probe; shot; signal; time; value
- versions: original; plain text
- ap-1757
- author: Lee, Won-Ho; Lee, Jong-Chul
- title: Atmospheric Argon Free burning Arcs with a Simplified Unified Model Using CFD-Arc Modeling
- date: 2013-01-02
- words: 2431
- flesch: 60
- summary: The present results for 200 A, com- pared with those of [3, 11] given in brackets, were maximum arc temperature 24 300 K (23 700 K), max- imum axial velocity 500 m/s (500 m/s) and arc volt- age 10.5 V (12.9 V). Free burning arcs, where the work piece acts as an anode, are frequently used for a number of applications.
- keywords: acta; anode; arc; arcs; argon; atmospheric; axial; axis; burning; cathode; column; conditions; electrodes; energy; equations; farmer; flow; free; haddad; high; investigation; lte; model; phys; plasma; polytechnica; pressure; results; simplified; temperature; thermal; unified; velocity
- versions: original; plain text
- ap-1759
- author: Makhlaj, Vadym A.; Garkusha, Igor E.; Aksenov, Nikolay N.; Chuvilo, Alexander A.; Landman, Igor S.
- title: High-Speed Monitoring of Dust Particles in ITER ELMs Simulation Experiments with QSPA Kh-50
- date: 2013-01-02
- words: 2496
- flesch: 62
- summary: The main parameters of QSPA plasma streams were as follows: ion impact energy about 0.4 ÷ 0.6 keV, the maximum plasma pressure 3.2 bar, and the plasma stream diameter about 18 cm. It is interesting to compare the results of QSPA Kh-50 plasma exposures with performed ex- periments on erosion product monitoring in QSPA-T facility [3, 1].
- keywords: camera; cracking; different; droplets; dust; elm; energy; erosion; experiments; fig; fusion; heat; high; interaction; iter; layer; load; material; monitoring; m−2; particles; plasma; qspa; results; simulation; speed; start; surface; target; threshold; time; tungsten; velocity
- versions: original; plain text
- ap-176
- author: Vognar, M.; Šimáně, Č.; Chvátil, D.
- title: Faraday Cup for Electron Flux Measurements on the Microtron MT 25
- date: 2001-01-01
- words: 2371
- flesch: 57
- summary: Keywords: microtron, Faraday cup, electron beams, electron flux measurement Fig. 1: Assembly drawing of the Faraday cup in the vacuum housing: 1 – cavity, 2 – graphite cup, 3 – steel stopper, 4 – permanent magnets, 5 – ceramic insulators, 6 – dece- lerating electrode, 7 – insulators, 8 – cylindrical part of the vacuum housing, 9 – housing bottom, 10 – collar, 11 – rear flange, 12 – rubber gasket, 13 – Al foil entry win- dow, 14 – front flange, 15 – pumping sleeve, 16 – vacu- um 4-lead bushing, 17 – Al front shielding permanent magnets 4 are inserted in part 2. 3: Measuring line: 1 – electron beam exit window, 2 – Faraday cup entry window, 3 – first indexed turret with four diaphragm mounts, 4 – second indexed turret with eight diaphragm mounts, 5 – conical stainless steel collimator, 6 – square W-steel collimator, 7 – optical bench, 8 – table desk, 9 – diaphragm frame, 10 – common platform carriage, 11 – guide rail
- keywords: beam; cavity; cup; current; density; distance; electrode; electron; electron flux; energy; entry; exit; faraday; faraday cup; flux; housing; input; mean; measured; mev; microtron; range; resistor; scattering; steel; thick; vacuum; value; walls; window
- versions: original; plain text
- ap-1763
- author: Olszewski, Serge; Lisitchenko, Tamara; Yukhymenko, Vitalij
- title: Long-Lived Plasma Process, Created by Impulse Discharge in Micro-Disperse Droplet Environment
- date: 2013-01-02
- words: 3826
- flesch: 63
- summary: The duration current impulse of spark discharge was ≤ 10 µs. Fig. The emission spectrum of spark discharge is represented on plot a) and spec- trum of sliding discharge on b).
- keywords: active; area; axis; breakdown; calculated; charged; conditions; consistent; current; different; discharge; disperse; droplet; drops; electric; electrodes; emission; environment; experimental; field; fig; figure; fog; high; impulse; instability; liquid; long; metal; micro; model; particles; plasma; pls; process; processes; results; self; size; spark; spectra; surface; systems; time; value; video; voltage; volume; water; working
- versions: original; plain text
- ap-1765
- author: Petit, Jean P.; Dore, Jean C.
- title: Velikhov Electrothermal Instability Cancellation by a Modification of Electrical Conductivity Value in a Streamer by Magnetic Confinement
- date: 2013-01-02
- words: 2663
- flesch: 59
- summary: Theoretical analysis of shock wave anihilation with MHD force field. Proceedings III, part 14.E – MHD flow, pp.
- keywords: acta; action; cancellation; close; collision; conference; coulomb; critical; development; electrical; electrothermal; equilibrium; experiment; field; france; gas; gases; generation; hall; instability; international; ionization; j. p.; jean; laboratory; lambda; magnetic; mhd; non; p. petit; parameter; petit; plasma; power; regime; research; shock; supersonic; temperature; tube; value; velikhov; wave
- versions: original; plain text
- ap-1767
- author: Píchal, Jan; Klenko, Julia
- title: Positioning of the Precursor Gas Inlet in an Atmospheric Dielectric Barrier Reactor, and its Effect on the Quality of Deposited TiOx Thin Film Surface
- date: 2013-01-02
- words: 3177
- flesch: 60
- summary: We used the plasma enhanced chemical vapour deposition (PECVD) method applying atmospheric dielectric barrier discharge (ADBD) plasma for TiOx thin films deposition, employing titanium isopropoxide (TTIP) and oxygen as reactants, and argon as a working gas. The XPS peak positions were referenced at the aliphatic carbon component at 285.0 eV. Due to inadequate equipment we were unfortunately not able to clean the film profile by sput- tering and perform XPS profile tests, so our research had to focus on film surface tests only.
- keywords: adbd; afm; air; atmospheric; barrier; best; carbon; chemical; composition; deposited; deposition; dielectric; discharge; electrode; figure; film; flow; gas; inlets; method; mode; oxygen; plasma; precursor; pressure; quality; reactions; reactor; slm; species; spectrum; substrate; surface; tests; thin; tio2; tiox; titanium; ttip; xps
- versions: original; plain text
- ap-1769
- author: Šíla, Ondrej; Kubeš, Pavel; Kravárik, Josef; Rezác, Karel; Klír, Daniel; Cikhardt, Jakub
- title: Estimation of Amount of Scattered Neutrons at Devices PFZ and GIT-12 by MCNP Simulations
- date: 2013-01-02
- words: 2042
- flesch: 63
- summary: For estimating of neutron energy we use time-of- flight method. Because of the fact that neutrons from D−D fusion reaction have velocity approximately 0.72c, we use simple non-relativistic equation for esti- mating neutron energy En from its velocity vn,
- keywords: current; device; d−d; effect; energy; experimental; figure; fusion; git-12; input; line; mcnp; neutrons; pfz; pinch; place; plasma; probe; results; scattered; setup; simulation; source; spectrum; steel
- versions: original; plain text
- ap-1771
- author: Šmíd, Michal; Antonelli, Luca; Renner, Oldoich
- title: X-ray Spectroscopic Characterization of Shock-Ignition-Relevant plasmas
- date: 2013-01-02
- words: 2424
- flesch: 55
- summary: Keywords: hot electrons, shock ignition, laser-produced plasma, X-ray spectroscopy, Kα radiation. Found values of plasma temperature 690 ± 10 eV, electron density 3 × 1022 cm−3 and the effective energy of hot electrons 45 ± 20 keV demonstrate the potential of X-ray methods in the characterization of the shock ignition environmental conditions.
- keywords: acta; beam; bent; cm−2; conditions; copper; crystal; czech; data; density; effective; electrons; emitted; energy; experimental; figure; high; hot; hot electrons; ignition; imaging; intensity; laser; lines; measured; number; phys; plasma; plastic; prague; ray; relevant; shock; signal; spectra; target; temperature
- versions: original; plain text
- ap-1775
- author: Torrisi, Lorenzo; Cavallaro, Salvatore; Cutroneo, Mariapompea; Krasa, Josef
- title: Nuclear Fusion Effects Induced in Intense Laser-Generated Plasmas
- date: 2013-01-02
- words: 2855
- flesch: 56
- summary: Deuterium ions at kinetic energies above 4 MeV have been measured by using ion collectors and SiC detectors in time-of-flight configuration. Thus protons and deuterium ions emitted from primary and sec- ondary targets, can be detected and their kinetic energy measured.
- keywords: charge; cross; density; depth; detection; deutered; deuterium; deuterons; distance; d−d; energy; events; fast; figure; function; fusion; high; ions; kinetic; laser; mev; neutrons; nuclear; number; order; plasma; polyethylene; primary; protons; reaction; scintillator; secondary; section; sic; spectrum; target; thin; tof; total
- versions: original; plain text
- ap-1777
- author: Turčičová, Hana; Huynh, Jaroslav
- title: Stimulated Raman Backscattering in Plasma — a Promising Tool for the Generation of Ultra-High Power Laser Beams
- date: 2013-01-02
- words: 2798
- flesch: 66
- summary: Keywords: stimulated Raman scattering, laser plasma, high intensity lasers. In the last fifteen years again a new potentially revolutionary technique has emerged from theoretical studies of wave instabilities in laser plasma, which presents a possibility of the production of intense and ultrashort laser pulses even without the large compres- sors.
- keywords: amplification; backscattering; beam; channel; compression; czech; density; duration; energy; experiments; frequency; gas; high; intensity; laser; long; output; pals; phys; plasma; power; prague; pulse; pump; raman; regime; sapphire; scattering; seed; short; simulations; srbs; stimulated; technique; time; wave
- versions: original; plain text
- ap-178
- author: Šimáně, Č.; Vognar, M.; Chvátil, D.
- title: Some Aspects of Profiling Electron Fields for Irradiation by Scattering on Foils
- date: 2001-01-01
- words: 3504
- flesch: 70
- summary: � �� �B � ln . The electron flux F(�) inside a cone of angular aperture 2�, normalized to unity for � from 0 to �, can be written in the form � � � �F W� � � � � � � sin d0 (1) where W(�)d�� the probability of an electron being scattered under an angle � into an interval d�, is, according to the Moliere theory [2], given by an expression (with only the first term taken into account) � �W B B � � � � � � � � � � � d d 2 2 exp � � � � � � (2) The constant factor before the exponential on the right side is the normalization factor and at the same time the amplitude of the Gaussian distribution.
- keywords: air; angular; aperture; beam; cup; current; degrees; density; distance; distribution; electron; exit; experimental; faraday; fig; flux; foils; forward; gaussian; mev; peak; results; scattering; thickness; value; window
- versions: original; plain text
- ap-1781
- author: Velardi, Luciano; Side, Domenico Delle; Marco, Massimo De; Nassisi, Vincenzo
- title: Emittance Characterization of Ion Beams Provided by Laser Plasma
- date: 2013-01-02
- words: 2699
- flesch: 66
- summary: Laser ion sources offer the possibility to obtain ion beams useful for particle accelerators. mrad)−2. Keywords: LIS source, ion beam, emittance.
- keywords: acceleration; applied; area; beams; brightness; chamber; charge; cup; current; electric; electrode; emittance; energy; expansion; extraction; figure; gap; high; instrum; ion; ions; laser; lis; materials; methods; nassisi; output; plasma; radiochromic; target; values; voltage
- versions: original; plain text
- ap-1783
- author: Vojta, Vladimír
- title: In memory of Alois Apfelbeck: An Interconnection between Cayley-Eisenstein-Pólya and Landau Probability Distributions
- date: 2013-01-02
- words: 3590
- flesch: 81
- summary: 69 Acta Polytechnica 53(2):63–69, 2013 1 Introduction 2 Inversion of the moment generating function 2.1 Direct procedure 2.2 Mellin procedure 2.3 Stieltjes procedure 3 Integrals and integral transforms 4 Conclusion Acknowledgements References Function W0(s) s(1+W0(s)) is a Stieltjes function [4].
- keywords: cayley; cot; differential; distribution; eisenstein; equation; f(x; f0(x; f1(x; function; integral; landau; laplace; mellin; operator; p.d.f; probability; proof; pólya; theorem; transform; w0(s; w0(−u
- versions: original; plain text
- ap-1785
- author: Hubata-Vacek, Václav; Kukal, Jaromír; Rusina, Robert; Buncová, Marie
- title: Fractal Dimension Estimation in Diagnosing Alzheimer’s Disease
- date: 2013-01-02
- words: 1925
- flesch: 71
- summary: Dimension estimates via various entropy estimates. lim q→1 Hq = − ∑ j=1 pj ln pj ; • Collision entropy
- keywords: als; alzheimer; bayesian; brain; czech; dimension; disease; ed̂q; entropy; estimates; estimation; fractal; h0,n; h1,hb; h1,n; h1,s; h2,s; harris; n(a; rényi; scans; shannon
- versions: original; plain text
- ap-1789
- author: Kutilek, Patrik; Viteckova, Slavka; Svoboda, Zdenek
- title: Characterization of Human Gait using Fuzzy Logic
- date: 2013-01-02
- words: 3990
- flesch: 59
- summary: 4. Fuzzy rule based expert system We can use fuzzy sets to evaluate the angle-angle di- agrams (cyclograms). Fuzzy sets of variables and linguistic expressions based on the area and the inclination angle of the cyclogram.
- keywords: acta; analysis; angle; area; behavior; characteristics; cyclogram; data; diagram; expert; figure; fuzzy; fuzzy logic; gait; human; inclination; inclination angle; input; logic; lower; measured; method; model; moment; movement; output; polytechnica; practice; rules; second; sets; small; speed; study; surface; system; table; terrain; treadmill; type; use; variables; walking
- versions: original; plain text
- ap-1791
- author: Tylova, Lucie; Kukal, Jaromir; Vysata, Oldrich
- title: Predictive Models in Diagnosis of Alzheimer’s Disease from EEG
- date: 2013-01-02
- words: 2348
- flesch: 66
- summary: Model error The three AR models above are easily comparable, because they produce an overdetermined system of M = m−n linear equations for n unknown variables a1, . . Keywords: Alzheimer’s disease, EEG, linear predictive model, quasi-stationarity, robust statistics, multiple testing, FDR.
- keywords: accuracy; alzheimer; brain; channel; diagnosis; differences; disease; eeg; engineering; error; fluctuation; iqr; linear; mad1; mad2; mad3; measures; med; model; predictive; robust; sensitivity; signal; significant; specificity; std; symmetric; testing; time; value
- versions: original; plain text
- ap-1795
- author: Hladík, Jakub; Lórencz, Róbert; Šimeček, Ivan
- title: Clock Math — a System for Solving SLEs Exactly
- date: 2013-01-02
- words: 2987
- flesch: 61
- summary: Future Work As we now have a working system, we would like to proceed to: • add support for both single and double precision for matrix elimination, as the β vector module count and GPU performance may differ; • add support for larger matrices than 4096 × 4096 – optimize SMP shared memory usage; • add support for automatic kernel group size tuning for larger matrices, as the group size lowers the mem- ory access time on different GPUs/architectures; • examine the modulus operation performance across different GPU architectures and further opti- mize the SAXPY, respectively DAXPY functions (mod m); • utilize OpenMPI library to add cluster support; • adjust and run the solver on our university STAR cluster to test AMD’s OpenCL CPU implementa- tion. The goal of matrix scaling is to adjust all the floating-point numbers of the matrix to their corresponding integer versions.
- keywords: architecture; arithmetic; clock; computation; computer; cores; elimination; equations; error; gpgpu; gpu; integer; linear; lórencz; math; matrix; memory; modular; numerical; nvidia; opencl; optimizations; parallel; performance; point; polytechnica; precision; problems; processor; results; rounding; row; scaling; sensitive; single; size; sles; smp; solution; solver; speedup; system; vector
- versions: original; plain text
- ap-1797
- author: Cartarius, Holger; Dast, Dennis; Haag, Daniel; Wunner, Günter; Eichler, Rüdiger; Main, Jorg
- title: Stationary and Dynamical Solutions of the Gross-Pitaevskii Equation for a Bose-Einstein Condensate in a PT symmetric Double Well
- date: 2013-01-03
- words: 6500
- flesch: 64
- summary: This is always fulfilled for PT symmetric wave functions. Stationary states are determined and the propagation of wave function is investigated using the time-dependent Gross- Pitaevskii equation.
- keywords: amplitude; atoms; bose; broken; case; complex; condensate; dimensional; double; eigenstates; eigenvalue; einstein; energy; equation; evolution; exact; figure; functions; gain; gaussian; gross; ground; hamiltonian; hermitian; imaginary; independent; initial; lett; long; loss; model; nonlinear; nonlinearity; norm; numerical; parameters; phys; pitaevskii; pitaevskii equation; point; positive; potential; probability; pt symmetric; quantum; real; rev; solutions; square; state; stationary; symmetric; symmetry; system; temporal; time; true; values; variational; wave; wave functions
- versions: original; plain text
- ap-1799
- author: Dey, Sanjib; Fring, Andreas
- title: The Two-dimensional Harmonic Oscillator on a Noncommutative Space with Minimal Uncertainties
- date: 2013-01-03
- words: 1542
- flesch: 73
- summary: Keywords: noncommutative space, non-Hermitian operators, 2D-systems. [16] S. Dey and A. Fring, Squeezed coherent states for noncommutative spaces with minimal length uncertainity relations, Phys.
- keywords: algebra; dimensional; fring; hamiltonian; harmonic; hermitian; minimal; noncommutative; oscillator; phys; pys; quantum; relations; space; spectrum
- versions: original; plain text
- ap-180
- author: Kopáčková, M.
- title: Critical Length of a Column in View of Bifurcation Theory
- date: 2001-01-01
- words: 3410
- flesch: 65
- summary: 4: Three deflections of the column � � � � � �Lu s f s s� �, ,0 1 (15) exists and is of the form � � � � � � � � � � � �� � � �u s b f v u s v s u Cv s s � � �� � � � �0 0 0 00 (12) Let us denote by L(u) the linear operator as the closure (in H1(0, 1)) of the operator given by the values � � � � � �L u s u s s u s� �� � �0 for the functions satisfying boundary conditions (8) and � � � � � �� � � �� �F u t s u s u s u s, sin sin ,� ��0 � (13) where = � � �0.
- keywords: = �; column; critical; deflections; eigenvalue; equation; f s; fig; form; length; linear; n �; nonlinear; problem; rod; s s; s v; sin; solution; theory; u s; w s; � /2; � w
- versions: original; plain text
- ap-1801
- author: Exner, Pavel; Barseghyan, Diana
- title: Spectral Analysis of Schrödinger Operators with Unusual Semiclassical Behavior
- date: 2013-01-03
- words: 5301
- flesch: 73
- summary: Schrödinger operators in cusps with non-trivial geometry In the second part of the paper we shall discuss Schrödinger type operators HΩ = −∆ΩD −V (3.1) with a bounded measurable potential V ≥ 0 on L2(Ω), where −∆ΩD is the Dirichlet Laplacian on a region Ω ⊂ Rd. In this paper we discuss several examples of Schrödinger operators describing a particle confined to a region with thin cusp-shaped ‘channels’, given either by a potential or by a Dirichlet boundary; we focus on cases when the allowed phase space is infinite but the operator still has a discrete spectrum.
- keywords: acta; analysis; barseghyan; bounds; constant; corresponding; cusps; dirichlet; discrete; domain; eigenvalue; estimates; exner; following; function; h−0; inequality; infinite; j=1; lclσ,1; lieb; math; moments; negative; non; number; operator; p(x; phys; polytechnica; potential; region; schrödinger; section; spectral; spectrum; theorem; thirring; unbounded; upper; ∥∥1
- versions: original; plain text
- ap-1803
- author: Hammou, Amine B.
- title: Generalized Continuity Equation for Quasi-Hermitian Hamiltonians
- date: 2013-01-03
- words: 1605
- flesch: 69
- summary: Using a quasi-Hermitian toy model of discrete delta function potential, it was shown that the reflection and transmission coefficients computed using this current obey the unitarity relation. By an appropriate mod- ification of the inner product on the Hilbert space, quasi-Hermitian operators can be made Hermitian [8].
- keywords: 2ak; continuity; current; delta; function; generalized; hermitian; hilbert; metric; phys; potential; quasi; reflection; relation; sin; space; transmission; unitarity
- versions: original; plain text
- ap-1805
- author: Himmel, Martin
- title: On the Solvability of Some Partial Differential Inequality
- date: 2013-01-03
- words: 4833
- flesch: 67
- summary: Thus, it is possible to interpret integrating factors and Dulac functions as invariant functions to certain cofactors: an inte- grating factor is nothing but an invariant function having cofactor k = −div X (16) and a Dulac function is an invariant function with cofactor The multiplier B ∈ W 1,p(Ω,R) is called Dulac function of the planar dynamical system (1) in Ω ⊆ D if and only if there is a real-valued continuous function g > 0
- keywords: 16th; algebraic; case; closed; cofactor; criterion; curves; cycles; definition; degree; differential; div; domain; dulac; equation; equilibrium; existence; factor; field; function; hilbert; hyperbolic; integral; integrating; invariant; limit; linear; local; non; number; orbits; ordinary; partial; periodic; planar; polynomial; problem; proof; quadratic; qualitative; real; set; smooth; solution; system; theorem; theory; vector
- versions: original; plain text
- ap-1807
- author: Janda, Jirí
- title: Weakly Ordered A-Commutative Partial Groups of Linear Operators Densely Defined on Hilbert Space
- date: 2013-01-03
- words: 5360
- flesch: 90
- summary: An interval [−1, 1] with ⊕ defined for 0 ≤ x,y by • x⊕y = x + y iff x + y ≤ 1, • x⊕ (−y) = x−y, • (−x) ⊕ (−y) = −(x⊕y) iff (x⊕y) exists and relation ≤G defined by x ≤G y iff x ≤ y and y −x ≤ 1 for all x,y ∈ + z exists and (Riii) implies that y + z exists.
- keywords: algebra; case; commutative; d(a; definition; effect; exists; generalized; group; hilbert; iff; lemma; linear; operation; operators; order; partial; pos(g; positive; proof; relation; set; space; w.r.t; weakly; woa; wop; x−y
- versions: original; plain text
- ap-1809
- author: Kleefeld, Frieder
- title: Complex Covariance
- date: 2013-01-03
- words: 5777
- flesch: 68
- summary: Despite this enormous amount of activities to “make sense of non-Hermitian Hamiltonians” [21, 22] and the fact that we had managed [6] to construct even a Lorentz-boost for complex-mass fields required to formulate non-Hermitian spinors and Dirac-equations, there has remained — as to our understanding — one crucial point neglected and unclear which is in the spirit of the QHJT and which will be the focus of the presented results: How can the general concept of “covariance” having been formulated by Albert Ein- stein (1905) Our considerations will lead us not only to some unconventional derivation of Lorentz transformations for complex-valued velocities, but also to the non-Hermitian Klein-Gordon and Dirac equations, which are to lay the foundations of a non-Hermitian quantum theory.
- keywords: acta; arxiv; causal; classical; complex; coordinates; covariance; derivation; dirac; e.g.; einstein; energy; eqs; equations; following; frames; generalized; hep; hermitian; inertial; inverse; kleefeld; llfv; lorentz; momentum; non; particle; phase; phys; plane; point; principle; quantum; real; relativity; rev; schrödinger; space; spatial; theory; time; transformations; velocities; velocity; wave; γ γ; ∂2ψ
- versions: original; plain text
- ap-1811
- author: Leach, P. G. L.
- title: Emmy Noether and Linear Evolution Equations
- date: 2013-01-03
- words: 2939
- flesch: 61
- summary: [5] Gasizov R & Ibragimov NH (1998) Lie symmetry analysis of differential equations in finance Nonlinear Dynamics 17 387–407. These each have an equivalent in the Schrödinger Equation corresponding to the Lagrangian and by extension to linear evolution equations in general.
- keywords: algebra; black; boundary; case; classical; conditions; differential; emmy; equation; evolution; f(t; finance; financial; function; hamiltonian; heat; initial; journal; lagrangian; lie; log; mathematics; mechanics; merton; model; noether; point; pricing; scholes; schrödinger; schwartz; solution; symmetries; symmetry; theorem; time; u∂u
- versions: original; plain text
- ap-1813
- author: Mostafazadeh, Ali
- title: Spectral Singularities do not Correspond to Bound States in the Continuum
- date: 2013-01-03
- words: 781
- flesch: 66
- summary: Spectral singularities appear for generic complex scattering potentials, while scattering potentials that involve bound states in the continuum are ex- tremely rare. Keywords: spectral singularity, bound state in continuum, resonance.
- keywords: continuum; mostafazadeh; phys; potentials; rev; scattering; schrödinger; singularities; singularity; spectral; states
- versions: original; plain text
- ap-1815
- author: Paseka, Jan; Riečanová, Zdenka
- title: Inherited Properties of Effect Algebras Preserved by Isomorphisms
- date: 2013-01-03
- words: 5480
- flesch: 75
- summary: Keywords: effect algebras; operator effect algebras; isomorphisms; operator representations of effect algebras.. AMS Mathematics Subject Classification: 06C15, (03G12, 81P10). [18] Riečanová Z., Zajac M., Hilbert space effect-representations of effect algebras, Reports of Mathematical Physics, 70 (2012), 283–290. 313 http://dx.doi.org/10.1007/BF02283036 http://dx.doi.org/10.1088/1751-8113/42/18/185206 http://dx.doi.org/10.1088/1751-8113/42/18/185206 doi: 10.1007/s00500-010-0561-7.DOI: 10.1007/s00500-010-0561-7 doi: 10.1007/s10701-011-9573-0 Acta Polytechnica 53(3):308–313, 2013 1 Introduction 2 Basic definitions and some known facts 2.1 Effect algebras and generalized effect algebras 2.2 Topologies on ordered sets 2.3 Morphisms, embeddings and isomorphisms of effect algebras 3 Basic properties of isomorphisms of effect algebras and operator representations 4 Some properties of operator effect algebras that need not be preserved by effect algebraic isomorphisms Acknowledgements References
- keywords: additive; adjoint; algebras; closed; complex; d(a; e(h; effect; effect algebras; elements; generalized; hilbert; iff; isomorphisms; net; operator; order; positive; properties; self; set; space; state; theorem; unbounded; ϕ(a; ϕ(aα
- versions: original; plain text
- ap-1817
- author: Riečanová, Zdenka; Zajac, Michal
- title: Intervals in Generalized Effect Algebras and their Sub-generalized Effect Algebras
- date: 2013-01-03
- words: 2316
- flesch: 69
- summary: [10] Polakovič, M.: Generalized effect algebras of bounded positive operators defined on Hilbert spaces, Reports on Mathematical Physics, 68 (2011), 241–250. Subalgebras, intervals and central elements of generalized effect algebras.
- keywords: algebra; effect; effect algebra; generalized; generalized effect; hilbert; linear; operators; positive; q]e; riečanová; set; space; sub
- versions: original; plain text
- ap-1819
- author: Znojil, Miloslav
- title: Non-Hermitian Star-shaped Quantum Graphs
- date: 2013-01-03
- words: 3140
- flesch: 66
- summary: Summary and outlook The idea of the study of the non-Hermitian star- shaped quantum graphs relates, equally strongly, to the studies of its non-Hermitian predecessors which remain topologically trivial (cf. The concept of quantum graphs 2
- keywords: acta; concept; crypto; dimensional; discretization; dynamics; friendly; graphs; hamiltonian; hermitian; hermiticity; hilbert; idea; matrix; metric; models; non; nontrivial; particular; phys; point; polytechnica; problem; quantum; quantum graphs; real; secular; smearing; space; star; theory; use; vertices; wedges; znojil; ;
- versions: original; plain text
- ap-182
- author: Fořt, I.; Medek, J.; Ambros, F.
- title: Erosion Wear of Axial Flow Impellersin a Solid-liquid Suspension
- date: 2001-01-01
- words: 3756
- flesch: 67
- summary: While the wear of the leading edge of the blade exhibits a monotonous dependence on the pitch angle, the sheet erosion exhibits the maximum rate within the interval of the pitch angles tested � � � 20°; 45°�. Pitched blade impellers with four adjustable inclined plane blades (see Fig. 2) made of rolled brass or construction steel were used for the erosion tests.
- keywords: angle; blade; brass; construction; dependence; duration; erosion; erosion process; fig; gypsum; hardness; impeller; impeller blade; parameter; particles; pitch; process; profile; rate; rolled; sand; silicious; steel; surface; suspension; thickness; vol; waste; wear; ° �
- versions: original; plain text
- ap-1821
- author: Balková, L'ubomíra; Hrušková, Aranka
- title: Continued Fractions of Square Roots of Natural Numbers
- date: 2013-01-04
- words: 4004
- flesch: 89
- summary: It is thus readily seen that if the number x is rational, then the algorithm eventually produces zeroes, i.e. there exists N ∈ N such that an = 0 for all n > N, thus x = a0 + 1 a1 + 1 a2 + 1 ... 3. Continued fractions of √ N Let us consider N ∈ N \ {0}.
- keywords: continued; form; fraction; irrational; length; numbers; n−1; observation; period; proof; quadratic; theorem
- versions: original; plain text
- ap-1823
- author: Beňo, Jaroslav; Hilar, Matouš
- title: Steel Fibre Reinforced Concrete for Tunnel Lining – Verification by Extensive Laboratory Testing and Numerical Modelling
- date: 2013-01-04
- words: 5513
- flesch: 64
- summary: Segment bending Segments were also tested under a load perpendicular to the longitudinal tunnel axis (Fig. 5b). Afterwards, SFRC segments were produced and then tested at the Klokner Institute of CTU.
- keywords: applied; bar; beams; behaviour; bending; better; compression; concrete; crack; czech; design; dosage; dramix; fibres; fig; figure; flexural; force; higher; key; laboratory; lining; load; loaded; lower; machine; material; maximum; metro; modelling; mpa; parameters; point; prague; precast; production; properties; reinforcement; results; samples; segmental; segments; sfrc; sfrc segments; shield; steel; strength; structures; tensile; testing; tests; thickness; tunnel; unloaded
- versions: original; plain text
- ap-1825
- author: Bodlák, Martin; Jarý, Vladimír; Konorov, Igor; Mann, Alexander; Nový, Josef; Paul, Severine; Virius, Miroslav
- title: Developing Control and Monitoring Software for the Data Acquisition System of the COMPASS Experiment at CERN
- date: 2013-01-04
- words: 3174
- flesch: 61
- summary: These modules receive the signals from the time and trigger system; when the trigger signal arrives, the readout is performed. System stability.
- keywords: acquisition; architecture; buffers; bytes; cern; commands; communication; compass; control; custom; daq; data; database; date; development; dim; event; experiment; figure; hardware; java; library; master; message; monitoring; new; nodes; number; package; performance; protocol; readout; requirements; results; server; slave; software; system; time; transfer; user; version
- versions: original; plain text
- ap-1827
- author: Holub, Štepán
- title: On an Algorithm for Multiperiodic Words
- date: 2013-01-04
- words: 2120
- flesch: 81
- summary: = FW(Q, k − m)[i mod m] if (i mod m) < , (i` mod m), i` = j proves [i]Q,k =
- keywords: algorithm; alphabet; approach; classes; construction; equivalence; example; fw(p; is+1; lemma; length; mod; periods; set; trivial; wilf; word
- versions: original; plain text
- ap-184
- author: Šimáně, Č.; Vognar, M.; Kříž, J.; Němec, V.
- title: A Small Transfer and Distribution System for Liquid Nitrogen
- date: 2001-01-01
- words: 1336
- flesch: 63
- summary: 3 Three-way LN valve The distribution of LN to three Dewars is enabled by a three-way solenoid valve (Fig. 3) consisting of individual ball valves with a common body. Keywords: liquid nitrogen, transfer system, solenoid pump, solenoid valve, automatic level control.
- keywords: ball; coil; core; current; delivery; dewar; distribution; fig; liquid; nitrogen; period; plunger; position; pump; solenoid; spring; system; type; valve; way
- versions: original; plain text
- ap-1841
- author: Šulc, Radek; Svačina, Ondřej
- title: The Effect of Kaolin Concentration on Flock Growth Kinetics in an Agitated Tank
- date: 2013-01-04
- words: 3412
- flesch: 56
- summary: (b) Relative error of equivalent flock size df,eq: average/maximum absolute value. Keywords: flocculation, flock growth, flock size, mixing, Rushton turbine, kaolin slurry, fractal geometry, image analysis.
- keywords: agitated; analysis; a∗f; camera; ck0; concentration; correlation; data; df2; dimension; dimensionless; dosage; effect; experimental; flocculant; flocculation; flock; fractal; generalized; growth; image; impeller; initial; kaolin; kinetics; max; mixing; model; parameters; particle; process; shape; size; solid; tank; time; value; vessel; wastewater
- versions: original; plain text
- ap-1843
- author: Mihaliková, Mária; Német, Miroslav; Vojtko, Marek
- title: IMPACT OF STRAIN RATE ON MICROALLOYED STEEL SHEET BREAKING
- date: 2014-08-31
- words: 1672
- flesch: 62
- summary: Keywords: strain rate, microalloyed steel, fracture surface. The effect of strain rate on the mechanical properties of automotive steel sheets, Acta Polytechnica, 53 (4), 2013, p. 384–387.
- keywords: acta; deformation; dimples; ductile; fig; figure; fracture; hc420la; impact; increases; loading; material; properties; rate; ratio; sheet; speed; steel; strain; strain rate; strength; surface; tensile
- versions: original; plain text
- ap-1847
- author: Bodner, Mark; Chadzitaskos, Goce; Patera, Jiří; Tereszkiewitz, Agnieszka
- title: THE SHMUSHKEVICH METHOD FOR HIGHER SYMMETRY GROUPS OF INTERACTING PARTICLES
- date: 2013-10-31
- words: 2342
- flesch: 67
- summary: Keywords: isospin, particle collisions, Lie group representation. [7] R. V. Moody, J. Patera, General charge conjugation operators in simple Lie groups, J. Math.
- keywords: channels; decomposition; dimensions; e(8; example; group; irreducible; lie; line; method; multiplicities; orbits; patera; probabilities; probability; product; representations; shmushkevich; simple; states; symmetry; weight; weyl
- versions: original; plain text
- ap-1849
- author: Burdík, Čestmír; Navrátil, Ondřej
- title: EXTREMAL VECTORS FOR VERMA TYPE REPRESENTATION OF B2
- date: 2013-10-21
- words: 3922
- flesch: 88
- summary: But for 2λ1 + λ2 + 3 = 0 ( 12 )n × (2z1z2 −z3)2n(4z1z4 + z23 ) λ1+ 12 λ2−n+ 3 2 , and for 2λ1 + λ2 + 3 odd, we have the solution f2 = λ1+ 12 λ2+1∑ n=0 ( 12 − 1 2λ2)n(−λ1 − 1 2λ2 − 1)n n!
- keywords: algebra; case; degree; differential; equations; extremal; f(z1,z2,z3,z4; function; g(t; lie; polynomial; representation; solution; system; variable; vectors; verma; z23
- versions: original; plain text
- ap-1851
- author: Exner, Pavel; Lipovský, Jiří
- title: RESONANCES ON HEDGEHOG MANIFOLDS
- date: 2013-10-21
- words: 8845
- flesch: 70
- summary: Resonance asymptotics The aim of this section is to say something about the asymptotic behaviour of the resolvent poles with re- spect to an increasing family of regions which cover in the limit the whole complex plane. The two prominent instances are resolvent resonances identi- fied with poles of the analytically continued resolvent of the Hamiltonian and scattering resonances where we look instead into the analytical structure of the on-shell scattering operator.
- keywords: acta; aharonov; asymptotics; axis; behaviour; bohm; boundary; case; compact; complex; condition; corresponding; coupling; disc; eigenvalues; energy; equation; example; exner; expression; extensions; f(x; field; figure; finite; function; graphs; green; halflines; hamiltonian; hedgehog; junctions; leads; lemma; lim; lipovský; magnetic; manifold; math; matrix; momentum; non; number; operator; particular; phase; phys; physics; plane; point; pole; polytechnica; proof; quantum; r(x; real; resolvent; resonances; scattering; second; single; situation; system; term; theory; true; unitary; ũ(k; vol; wave; weyl; γ(α
- versions: original; plain text
- ap-1852
- author: Gáliková, Veronika; Prešnajder, Peter
- title: COULOMB SCATTERING IN NON-COMMUTATIVE QUANTUM MECHANICS
- date: 2013-10-24
- words: 4419
- flesch: 76
- summary: In this paper we present an exact calculation of the NC Coulomb scattering matrix Sλj (E) in the j-th partial wave. As the model is exactly solvable, we were able to find an exact formula for the NC Coulomb scattering matrix Sλj (E) in j-th partial wave.
- keywords: analog; a†α; commutative; coulomb; cut; ecrit; energies; energy; equation; exact; function; iλe; limit; matrix; mechanics; non; operator; phys; poles; potential; prešnajder; problem; quantum; radial; rej; relations; scattering; schrödinger; solution; space; standard; wave; γ(j
- versions: original; plain text
- ap-1855
- author: Hlavatý, Ladislav; Navrátil, Josef; Šnobl, Libor
- title: ON RENORMALIZATION OF POISSON–LIE T-PLURAL SIGMA MODELS
- date: 2013-10-24
- words: 3444
- flesch: 63
- summary: The role of ambiguities in renormalization group equations of Poisson–Lie sigma models with truncated matrices of parameters is investigated. Keywords: sigma models, string duality, renormalization group.
- keywords: algebra; case; choice; diagonal; dimensional; double; drinfel’d; duality; equations; flows; form; group; invariant; lie; lie t; loop; manin; matrix; models; phys; plurality; poisson; proportional; renormalization; renormalization group; sigma; structure; triples
- versions: original; plain text
- ap-1858
- author: Chadzitaskos, Goce; Tolar, Jiří
- title: PROPOSAL OF NEW OPTICAL ELEMENTS
- date: 2013-10-24
- words: 3255
- flesch: 65
- summary: the cylinder is assembled from single crystal strips made from various materials and cut along different planes, so that the mutual distances between the atomic planes at one end of each strip fulfill Bragg’s condition; (2.) Bent single crystal strips are fixed on the sides by brackets 3.
- keywords: atomic; axis; bragg; case; chadzitaskos; channels; cross; crystal; diffraction; distance; element; force; interference; light; microscopy; mutual; optical; parabolic; parallel; planes; ray; section; single; single crystal; slits; strip; system; telescope; wavelength
- versions: original; plain text
- ap-186
- author: El-Hady, H. M. Abd; Grünwald, A.; Vlčková, K.; Zeithammerová, J.
- title: Lewatit S100 in Drinking Water Treatment for Ammonia Removal
- date: 2001-01-01
- words: 1942
- flesch: 59
- summary: Keywords: Lewatit S100, ion exchange, ammonia removal, drinking water. The objec- tive of our work is to treat drinking water spiked with NH4 + (10±0.5, 5±0.5 and 2±0.5) mg l �1, using Lewatit S100.
- keywords: ammonia; ammonium; breakthrough; capacity; column; concentration; drinking; exchange; fig; form; ion; lewatit; mg l; nacl; nh4; regeneration; removal; results; s100; vol; water
- versions: original; plain text
- ap-1860
- author: Masáková, Zuzana; Pelantová, Edita
- title: ITINERARIES INDUCED BY EXCHANGE OF TWO INTERVALS
- date: 2013-10-24
- words: 4749
- flesch: 82
- summary: This notion occurs in various con- texts such as return words, Abelian return words, or substitution invariance of the corresponding codings, i.e., Sturmian words. A characterization of Sturmian words by return words.
- keywords: amicable; exchange; infinite; interval; irrational; iti; itineraries; itinerary; length; map; number; point; proof; proposition; r(x; r1r2; return; set; sturmian; theorem; time; transformation; words
- versions: original; plain text
- ap-1863
- author: Pošta, Severin; Havlíček, Miloslav
- title: NOTE ON VERMA BASES FOR REPRESENTATIONS OF SIMPLE LIE ALGEBRAS
- date: 2013-10-29
- words: 4695
- flesch: 81
- summary: 4. Conclusions Problems of unified construction of Verma bases for other series of simple Lie algebras (namely orthogonal and symplectic) and of an effective determination of matrix elements in these cases are still open. Verma bases for representations of classical simple Lie algebras.
- keywords: acta; algebras; amer; bases; canonical; classical; construction; corresponding; crystal; dimensional; elements; finite; fi−1; form; groups; inequalities; irreducible; i−1; i−1f; knn; lemma; lie; lie algebras; linear; m+1; math; mathematics; matrix; modules; monomials; m−k; n f; n+1; note; operators; phys; polytechnica; proof; quantum; representations; sci; set; simple; soc; special; theorem; theory; u(a−n; use; vectors; verma; vol
- versions: original; plain text
- ap-1865
- author: Riečanová, Zdenka; Janda, Jiří
- title: MAXIMAL SUBSETS OF PAIRWISE SUMMABLE ELEMENTS IN GENERALIZED EFFECT ALGEBRAS
- date: 2013-10-24
- words: 4443
- flesch: 71
- summary: Further, let us investigate inter- vals in pairwise summable generalized effect algebras. Phys. 68, (2011), 261–270. 461 http://dx.doi.org/10.1007/s00500-013-1083-x Acta Polytechnica 53(5):457–461, 2013 1 Introduction and some basic definitions 2 Pairwise summable generalized effect algebras 3 Intervals in pairwise summable generalized effect algebras 4 Blocks of pairwise summable elements in generalized effect algebras Acknowledgements References
- keywords: algebra; b ∈; blocks; e;⊕; effect; effect algebra; elements; example; following; g;⊕; generalized; generalized effect; hilbert; intervals; lattice; maximal; operators; pairwise; partial; q]g; riečanová; set; space; sub; subset; summability; summable; theorem
- versions: original; plain text
- ap-1866
- author: Znojil, Miloslav
- title: NEW CONCEPT OF SOLVABILITY IN QUANTUM MECHANICS
- date: 2013-10-24
- words: 7942
- flesch: 64
- summary: Non-Hermitian quantum models, indecomposable representations and coherent states quantization. Non-Hermitian quantum graphs 8.1.
- keywords: acta; available; boundary; certain; choice; complex; concept; condition; correct; coupling; crypto; current; degenerate; discrete; domain; eigenvalues; elementary; eligible; energies; environment; equation; evolution; fig; figure; form; friendly; general; generic; graphs; h(f; h(s; hamiltonian; hermitian; hermiticity; hilbert; hilbert space; inner; math; mathematical; matrix; mechanics; metric; model; new; non; numerical; observability; observable; operator; paper; parameters; parametric; pattern; phys; physical; physics; point; polytechnica; positive; present; product; quantum; real; reality; ref; review; second; sense; set; simplicity; single; solvability; solvable; space; special; spectrum; stability; suitable; symmetric; system; theory; time; toy; transition; upper; znojil
- versions: original; plain text
- ap-1870
- author: Levi, Decio; Winternitz, Pavel
- title: LIE GROUPS AND NUMERICAL SOLUTIONS OF DIFFERENTIAL EQUATIONS: INVARIANT DISCRETIZATION VERSUS DIFFERENTIAL APPROXIMATION
- date: 2013-10-29
- words: 4340
- flesch: 66
- summary: As far as applications to the numerical solu- tions of differential equations are concerned, the idea, originally due to Dorodnitsyn [12, 13], is to start from the differential equation, its symmetry group G and the Lie algebra L of G, realized by vector fields. [24] rather than to “jet space” as for differential equations [25].
- keywords: approximation; continuous; difference; differential; differential approximation; differential equations; dimensional; discrete; discretization; equations; fields; gl(2,r; group; hn+1; invariant; lattice; levi; lie; math; method; numerical; ode; odes; order; ordinary; phys; point; prolongements; schemes; sci; second; sim(2; sl(2,r; solutions; symmetries; symmetry; terms; variables; vector; winternitz
- versions: original; plain text
- ap-1872
- author: Smirnov, Yuri F.; Turbiner, Alexander
- title: gln+1 ALGEBRA OF MATRIX DIFFERENTIAL OPERATORS AND MATRIX QUASI-EXACTLY-SOLVABLE PROBLEMS
- date: 2013-10-29
- words: 5781
- flesch: 73
- summary: Reps in 2 × 2 matrices Take gl2 in two-dimensional reps by 2 × 2 matrices, M11 = ( 1 0 0 0 ) , M22 = ( 0 0 0 1 ) , M12 = ( 0 1 0 0 ) , M21 = ( 0 0 1 0 ) , Then the generators (11) of gl3 are: T −1 = ( ∂1 0 0 ∂1 ) , T −2 = ( ∂2 0 0 ∂2 ) , E11 = ( x1∂1+1 0 0 The Casimir operators are: C1 = k, C2 = k(k + 2).
- keywords: algebra; algebraic; body; calogero; cartan; case; casimir; decomposition; differential; dimensional; e22; finite; form; generators; gl2; gl3; gln+1; hexagon; integer; length; lie; m11; m22; matrices; matrix; mij; mixed; model; negative; newton; non; operators; order; points; polynomials; property; realization; relations; representation; reps; solvable; space; sutherland; turbiner; vol; weyl
- versions: original; plain text
- ap-1874
- author: Uhlmann, Armin
- title: THE NUMBER OF ORTHOGONAL CONJUGATIONS
- date: 2013-10-29
- words: 2181
- flesch: 70
- summary: An anti-linear operator ϑ is said to be Hermitian or self-adjoint if ϑ† = ϑ. ϑ is said to be skew Hermitian or skew self-adjoint if ϑ† = −ϑ. The linear space of all Hermitian (skew Hermitian) anti-linear operators are denoted by B(H)+anti respectively B(H) − anti. Rank-one linear operators are as usually written( |φ′〉〈φ′′| ) Later on, F. Herbut and M. Vujičić were able to clarify the structure of anti-linear normal oper- ators, [4], by proving that such a decomposition also exists for anti-linear normal operators.
- keywords: adjoint; anti; cambridge; canonical; case; conjugations; dimensional; dimh; equality; form; hermitian; hilbert; linear; linearity; number; operator; orthogonal; product; quantum; set; skew; space; unitary; university; wigner
- versions: original; plain text
- ap-1876
- author: Exner, Pavel
- title: FOREWORD: THREE QUARTERS A CENTURY
- date: 2013-10-29
- words: 615
- flesch: 53
- summary: Since 1973, he has spent several years at the Laboratory of Theoretical Physics, JINR, in Dubna, where he also wrote and defended his higher doctoral thesis on Canonical Realizations, a certain algebraic representation theory of Lie algebras. In cases like the jubilee that this Festschrift celebrates, there is indeed a lot to think about, because the life of Professor Miloslav Havlíček has been anything but boring.
- keywords: acta; algebraic; algebras; czech; lie; life; miloslav; physics; polytechnica; prague; professor; years
- versions: original; plain text
- ap-1878
- author: Giovannelli, Franco
- title: WHAT IS NEW IN ASTROPARTICLE PHYSICS
- date: 2013-12-18
- words: 12427
- flesch: 64
- summary: J. C – Particles and Fields 15 (Ns 1–4), 150 [72] Genzel, R. et al.: 2003a, ApJ 594, 812 [73] Genzel, R. et al.: 2003b, Nature 425, 934 [74] Ghez, A.M. et al.: 2005, ApJ 620, 744 [75] Ghosh, S.K.: 2009, in Frontier Objects in Astrophysics and Particle Physics, F. Giovannelli & G. Mannocchi, (eds.), SIF, Ed. Ltd., 99–135 [9] Aharonian, F.A.: 2007, Sci. 315, 70 [10] Albert, J. et al. (MAGIC Collaboration): 2008, Sci. 320, 1752 [11] Alcock, C. et al.: 2000, ApJ 542, 281 [12] von Ballmoos, P., Takahashi, T., Boggs, S.E.: 2010, Nucl.
- keywords: a&a; abdo; acceleration; acta; apj; astronomy; astroparticle; astrophysics; background; bang; behaviour; big; binaries; binary; black; bologna; close; compact; compositori; cosmic; crs; dark; data; different; diffuse; discovery; distribution; dust; e.g.; ebl; eds; emission; energies; energy; energy cosmic; et al; evolution; experiments; extragalactic; fermi; fields; flux; formation; franco; frontier; galactic; galaxies; galaxy; gamma; gev; giovannelli; graziati; grb; grbs; higgs; high; high energy; history; important; italy; jets; large; lat; light; magnetic; mannocchi; mass; massive; matter; measurements; mem; model; multifrequency; nature; near; neutrinos; neutron; new; objects; observations; observed; open; optical; orbital; origin; papers; particle; physics; polytechnica; possible; problems; processes; progenitors; pulsars; quark; radiation; radio; range; ray; rays; recent; redshift; references; reionization; results; rev; review; sabau; sait; sci; sif; sne; sources; space; spectra; spectrum; standard; stars; state; study; system; talk; time; understanding; universe; upper; vhe; years
- versions: original; plain text
- ap-188
- author: Drchalová, J.; Poděbradská, J.; Maděra, J.; Černý, R.
- title: Evaluation of Water Resistance and Diffusion Properties of Paint Materials
- date: 2001-01-01
- words: 2327
- flesch: 55
- summary: Integral capillarity of paint-glass concrete systems for t � [0, 180 min], a detail 4 Measuring the effective diffusion coefficient of water vapor When evaluating water vapor transport properties, we preferred diffusion coefficient D defined as j D� � grad c� , (3) rather than diffusion permeability �, which is defined as follows: j pv� ��grad . The diffusion coefficient at temperature T can be cal- culated using the following formula: D m Rd S M T C B A T � � �� � � � w � 1 10 , (9) where d is the thickness of the board-type specimen, M is the molar mass of water vapor, R is the universal gas constant, A, B, C are the constants in the empirical formula describing the dependence of the saturated water vapor pressure on temperature pv, s , p Tv s C BAT, � � � �10 , (10) A = 2900 K, B = 24.738, C = –4.65.
- keywords: acrylate; basic; capillarity; coefficient; concrete; czech; diffusion; effective; fig; glass; integral; karlocolor; mass; materials; measuring; min; paint; properties; repellent; specimen; substrate; systems; time; value; vapor; vol; water
- versions: original; plain text
- ap-1880
- author: Jones, Lawrence W.
- title: THE FIRST CENTURY OF COSMIC RAYS, AN HISTORICAL OVERVIEW
- date: 2013-12-18
- words: 2571
- flesch: 50
- summary: 53 supplement/2013 The First Century of Cosmic Rays, an Historical Overview hydrogen target served as a veto to restrict triggered events to unaccompanied incident cosmic ray particles (virtually all protons). Lawrence Jones — This was indeed a relevant set of measurements, which also hinted at an extra-terrestrial source of cosmic rays. 499 Acta Polytechnica 53(Supplement):497–499, 2013 1 The Hess Discovery 2 Early Discoveries 3 The accelerator–cosmic ray interaction 4 The Echo Lake and Mount Evans research program 5 Recent cosmic ray research References
- keywords: accelerator; acta; air; balloon; brookhaven; century; cern; chamber; cloud; cosmic; cosmic ray; counters; course; data; detector; discoveries; discovery; early; echo; energy; evans; flights; gev; hess; interactions; ionization; laboratory; lake; measurements; nuclear; particle; physics; polytechnica; proton; ray; rays; recent; research; results; rossi; spark; studies; synchrotron; target; years
- versions: original; plain text
- ap-1881
- author: Shaviv, Giora
- title: THE DISCOVERY OF THE CHANDRASEKHAR MASS AND THE CHANDRASEKHAR-EDDINGTON CONTROVERSY
- date: 2013-12-18
- words: 5396
- flesch: 64
- summary: In the paper Eddington set out to look for flaws in the derivation of the result P ∼ ρ4/3 for relativistic electrons. References [1] For detailed reference see: Giora Shaviv, The Life of Stars, Springer & Magnes Pub., 2009 505 Acta Polytechnica 53(Supplement):500–505, 2013 1 Introduction 2 Enrico Fermi & Paul Dirac 3 Eddington's white dwarf paradox 4 Cracking the paradox: Fowler 5 Pokrowski – the idea of a limiting mass 6 Anderson expands Pokrowski's idea but changes the reasons 7 Stoner: relativistic degeneracy leads to a limiting mass 8 Anderson again 9 Stoner responds 10 Chandrasekhar 11 The personal side References
- keywords: anderson; atom; attack; bohr; chandrasekhar; cm3; controversy; density; dirac; discovery; dwarfs; eddington; electrons; energy; equation; fermi; fowler; gas; general; gravitational; high; idea; later; limiting; mass; matter; milne; new; number; paper; paradox; particles; pauli; pokrowski; principle; quantum; relativistic; relativity; result; special; star; state; statistics; stellar; stoner; temperature; theory; time; white; words; ρmax
- versions: original; plain text
- ap-1884
- author: Strauss, Thomas
- title: OPERA HIGHLIGHTS
- date: 2013-12-18
- words: 3531
- flesch: 61
- summary: OPERA collaboration thanks CERN, INFN and LNGS for their support and work. 517 Acta Polytechnica 53(Supplement):512–517, 2013 1 Introduction 2 DAQ and analysis 2.1 Tau detection 2.2 Physics run performance and data analysis status 2.3 Charm decay topologies in neutrino interactions 3 nu-velocity measurement 4 Conclusions Acknowledgements References
- keywords: analysis; background; beam; brick; cern; charm; cngs; collaboration; conference; data; decay; detection; detector; ecc; efficiency; electronic; emulsion; events; experiment; figure; films; interaction; lngs; long; measured; muon; neutrino; number; opera; opera experiment; oscillation; physics; primary; reconstructed; results; search; shows; target; time; total; tracks; velocity; vertex
- versions: original; plain text
- ap-1887
- author: Straessner, Arno
- title: HIGHLIGHTS FROM THE LHC
- date: 2013-12-18
- words: 4602
- flesch: 69
- summary: Keywords: LHC, ATLAS, CMS, Standard Model measurements, SM Higgs boson, MSSM Higgs boson, supersymmetry, top quark, exotic particle searches. Its excitations can be measured as a scalar Higgs boson.
- keywords: 0.00±; atlas; atlas collaboration; background; boson; cms; cms collaboration; collaboration; cross; data; decay; detectors; energy; event; excess; exp; fig; figure; final; gauge; gev; hadronic; hep; higgs; jet; jets; leptons; lett; lhc; mass; measurements; model; mssm; new; particles; pas; phys; physics; predictions; production; quark; results; rev; scale; searches; section; signal; standard; states; supersymmetric; susy; tev; theo; transverse
- versions: original; plain text
- ap-1888
- author: Bellotti, E; Broggini, C.; Di Carlo, G.; Laubenstein, M.; Menegazzo, R.
- title: STUDY OF THE TIME DEPENDENCE OF RADIOACTIVITY
- date: 2013-12-18
- words: 2544
- flesch: 66
- summary: Time modulations We searched for time variations with periods from 6 hours to 400 days. In total about 5100 energy spectra, one hour measuring time each, were collected and used to search for time variations of the decay constant with periods from a few hours to 1 year.
- keywords: 137cs; activity; amplitude; background; carlo; constant; data; days; decay; dependence; detector; energy; experiment; exponential; half; hours; kev; laboratory; larger; life; mca; measured; period; rate; set; source; spectrum; temperature; time; underground; value; variations; year
- versions: original; plain text
- ap-1891
- author: Auriemma, Giulio
- title: CP VIOLATIONS (AND MORE) AFTER THE FIRST TWO YEARS OF LHCB
- date: 2013-12-18
- words: 4633
- flesch: 74
- summary: References [1] G. Altarelli, in Encyclopedia of Mathematical Physics, J.-P. Francoise et al. eds. [10] E. Komatsu et al., Astrophys.
- keywords: aaij; asymmetry; b0s; baryon; bosons; branching; cmssm; compatible; cpv; dark; data; decay; direct; energy; et al; field; figure; fit; gev; hep; higgs; lhcb; limits; mass; matter; measurements; mechanism; minimal; mixing; new; number; order; particle; phase; phys; phys.rev; phys.rev.lett; physics; possible; present; quarks; rare; ratio; ref; sakharov; search; susy; tev; tew; theory; time; transition; universe; violations; years; µ+µ−
- versions: original; plain text
- ap-1892
- author: Gustavino, Carlo
- title: THE 2H(α, γ)6LI REACTION AT LUNA AND BIG BANG NUCLEOSYNTHETIS
- date: 2013-12-18
- words: 2112
- flesch: 66
- summary: As the 2H(α, γ)6Li cross section drops steeply at low energy, it has never before been studied directly at Big Bang energies. For the first time the reaction has been studied directly at Big Bang energies at the LUNA accelerator.
- keywords: 2h(2h; 6li; 7li; abundance; background; bang; bbn; beam; big; cross; detector; energies; energy; excess; experimental; figure; kev; line; luna; measurement; nuclear; nucleosynthesis; phys; reaction; roi; section; standard; stars; γ)6li
- versions: original; plain text
- ap-1897
- author: Morselli, Aldo
- title: SEARCH FOR DARK MATTER WITH GAMMA-RAYS: A REVIEW
- date: 2013-12-18
- words: 3421
- flesch: 67
- summary: [27] M. A. DuVernois et al., [HEAT Coll.], ApJ 559, 296 (2001) [arXiv:1201.2691] [17] M. Ackermann et al.
- keywords: abdo; ackermann; acta; analysis; annihilation; catalog; center; coll; cosmic; cross; dark; data; diffuse; electrons; emission; energy; et al; fermi; fermi coll; figure; flux; galactic; galaxies; gamma; gev; high; instrument; lat; limits; matter; mev; models; months; morselli; new; pamela; phys; range; ray; rays; region; rev; search; searches; sky; sources; space; spectrum; upper; wimp; years
- versions: original; plain text
- ap-1899
- author: Bisnovatyi-Kogan, Gennady S.; Chernin, Artur; Merafina, Marco
- title: DARK ENERGY AND KEY PHYSICAL PARAMETERS OF CLUSTERS OF GALAXIES
- date: 2013-12-18
- words: 3209
- flesch: 67
- summary: Keywords: dark energy, equilibrium models, galaxy clusters. It is shown, that dark energy reduces the dynamic stability of the configuration.
- keywords: 1/3; a.d; bisnovatyi; chernin; cluster; configuration; constant; cosmological; dark; density; energy; equation; equilibrium; galaxies; gravity; kogan; local; mass; matter; merafina; radius; stability; system; value; velocity; virgo; βin
- versions: original; plain text
- ap-190
- author: Dobrovská, D.
- title: Management of People by Managers with a Technical Background - Research Results
- date: 2001-01-01
- words: 2822
- flesch: 39
- summary: Benchmarking studies show that personnel managers of Czech companies, when compared with those in other European countries, are still obliged to spend a part of their working time on ineffective administra- tive procedures, dealing with problems of current concern of their company rather than addressing conceptual issues re- lated to the company’s future strategy (according to a report by Price Waterhouse – Coopers, 1999). The sources seen as most important (in order of frequency of use) are the internet, information from employees, employee sugges- tions, minutes taken at company management meetings, public company media and company documents.
- keywords: activities; area; assessment; average; companies; company; czech; employees; financial; information; items; management; managers; methods; motivation; operating; personal; personnel; personnel management; policy; professional; questionnaire; research; respondents; results; selection; skills; sources; staff; strategy; studies; study; technical; training; work
- versions: original; plain text
- ap-1900
- author: Persiani, Rino
- title: RESULTS FROM THE XENON100 EXPERIMENT
- date: 2013-12-18
- words: 3600
- flesch: 58
- summary: Detector backgrounds The background in XENON100 comes mainly from external sources and from the materials used for the construction of the detector itself. The electronic recoil band in log10(S2/S1) vs. en- ergy space defines the region of background events from β-
- keywords: analysis; aprile; background; band; calibration; collaboration; dark; data; days; detector; electron; energy; events; experiment; fiducial; gas; kev; level; light; liquid; live; low; lxe; mass; materials; matter; measured; neutron; nuclear; order; phase; phys; pmts; radioactive; recoil; region; results; run; scintillation; search; selection; sensitivity; shield; sources; target; tpc; wimp; xenon100
- versions: original; plain text
- ap-1903
- author: Colafrancesco, Sergio
- title: THE SZ EFFECT IN THE PLANCK ERA: ASTROPHYSICAL AND COSMOLOGICAL IMPACT
- date: 2013-12-18
- words: 9401
- flesch: 55
- summary: Planck detected SZE clusters are followed-up with a multi-frequency observation program in the X-rays (XMM-Newton), SZE (AMI), optical (ENO, ESO, RTT, NOT, NOAO, among others) to obtain confirmation, redshift estima- tion and estimates of the global physical parameters. Future SZE cluster surveys have an en- hanced sensitivity to constrain primordial magnetic fields because of the z-independence of the SZE and of the smaller biases in the cluster mass reconstruc- tion.
- keywords: 2010; a&a; acta; additional; analysis; apj; astrophysical; atmospheres; bullet; cavities; cavity; cluster; cmb; colafrancesco; combination; constraints; cosmic; cosmological; dark; density; different; distribution; e.g.; effect; electron; emission; energy; evolution; expected; fact; field; fig; figure; frequency; function; galaxies; galaxy; galaxy clusters; ghz; halo; high; hot; icm; ics; information; intensity; kev; ksze; large; like; line; lobes; low; magnetic; mass; massive; matter; mnras; nature; non; nonthermal; number; observations; overall; planck; plasma; polarization; polytechnica; possible; powerful; presence; pressure; probe; properties; radiation; radio; range; ray; redshift; relativistic; scale; scattering; sensitivity; set; signal; sources; spatial; spectral; spectrum; strong; structure; study; surveys; sze; sze cluster; sze observations; sze polarization; sze spectrum; temperature; thermal; thermal sze; total; universe; velocity; wide
- versions: original; plain text
- ap-1904
- author: Whalen, Daniel J.
- title: THE FIRST STARS
- date: 2013-12-18
- words: 3978
- flesch: 62
- summary: Pop III stars are the key to the character of primeval galaxies, the first heavy elements, the onset of cosmological reionization, and the seeds of supermassive black holes. The original numerical simulations suggested that Pop III stars formed in small pregalactic structures known as cos- mological minihalos at z ∼ 20 ÷ 30, or ∼ 200 Myr after the Big Bang [1–4, 24].
- keywords: accretion; apj; black; collapse; cosmic; cosmological; detection; disk; early; et al; explosions; final; formation; fragments; galaxies; halo; holes; iii; j. et; jwst; m o; mass; masses; metal; mnras; models; norman; poor; pop; pop iii; primordial; simulations; sne; stars; supernovae; time; today; universe; whalen
- versions: original; plain text
- ap-1906
- author: Lovisari, Lorenzo; Laganá, Tatiana F.; Borm, Katharina; Schellenberger, Gerrit; Reiprich, Thomas H.
- title: METALS IN THE ICM: WITNESSES OF CLUSTER FORMATION AND EVOLUTION
- date: 2013-12-18
- words: 2699
- flesch: 57
- summary: Furthermore, the ob- served evolution of metal abundances can trace the star formation rate and the element ratios, e.g. the ratio of Fe and α-elements can be used to obtain infor- mation on the different types of supernovae that have 580 vol. It is challenging to measure metal abundances in distant clusters, is challenging, and it requires very high quality data.
- keywords: a&a; abundance; acta; clusters; core; different; distribution; elements; enrichment; erosita; et al; evolution; formation; galaxies; galaxy; gas; grant; groups; high; icm; large; lovisari; mass; measurements; metal; metallicity; polytechnica; prep; processes; profiles; radial; redshift; time
- versions: original; plain text
- ap-1909
- author: Sato, Kosuke; Matsushita, Kyoko; Ishisaki, Yoshitaka; Yamasaki, Noriko Y.; Ohashi, Takaya
- title: THERMAL AND CHEMICAL EVOLUTIONS OF GALAXY CLUSTERS OBSERVED WITH SUZAKU
- date: 2013-12-18
- words: 3946
- flesch: 67
- summary: We studied the properties of the intracluster medium (ICM) of galaxy clusters to the outer regions observed with Suzaku. Keywords: galaxy clusters, X-rays, thermal evolution, chemical evolution.
- keywords: abundance; band; clusters; derived; entropy; et al; figure; galaxies; icm; kev; light; luminosity; mass; metal; observed; pasj; profiles; r180; r200; r500; radial; radius; ratios; region; sato; similar; sne; suzaku; temperature; type; xmm
- versions: original; plain text
- ap-1911
- author: Bernabei, R.; Belli, P.; Cappella, F.; Caracciolo, V.; Cerulli, R.; Dai, C. J.; d’Angelo, A.; Di Marco, A.; He, H. L.; Incicchitti, A.; Ma, X. H.; Montecchia, F.; Sheng, X. D.; Wang, R. G.; Ye, Z. P.
- title: DAMA RESULTS: DARK MATTER IN THE GALACTIC HALO
- date: 2013-12-18
- words: 4700
- flesch: 68
- summary: J. A 47, 91 [26] K. Freese et al.: 2005, Phys. Rev. D 61, 117301; R. Bernabei et al.: 2000, New J. of Phys. 2, 15.1; 2000, Phys.
- keywords: annual; background; belli; bernabei; bernabei et; cycles; dama; dark; data; different; energy; et al; eur; events; experimental; exposure; galactic; halo; independent; instr; interaction; interval; kev; large; lett; libra; low; matter; meth; model; modulation; nucl; nuclei; particles; phys; positive; present; processes; rate; related; results; rev; sensitive; set; signature; single; spin
- versions: original; plain text
- ap-1912
- author: Šimon, Vojtech
- title: NON-THERMAL EMISSION FROM CATACLYSMIC VARIABLES: IMPLICATIONS ON ASTROPARTICLE PHYSICS
- date: 2013-12-18
- words: 4553
- flesch: 63
- summary: [25] Körding, E. et al., 2008, Sci, 320, 1318 [26] Körding, E. G. et al., 2011, MNRAS, 418, L129 [27] Kuijpers, J. et al., 1997, A&A, 322, 242 [28] Kuulkers, E. et al., 2006, in: Compact stellar X-ray sources. [18] Harrison, T. E. et al., 2010, ApJ, 710, 325 [19] Heise, J. et al., 1985, A&A, 148, L14 [20] Henden, A., 2012, AAVSO International database, private communication [21] Iyudin, A. F. et al., 2005, A&A, 443, 477 [22] Iyudin, A. F., 2010, ARep, 54, 611 [23] José, J. et al., 2006, NuPhA, 777, 550 [24] Kafka, S., Hoard, D. W., 2009, PASP, 121, 1352
- keywords: 22na; accretion; activity; apj; band; conditions; cvs; decay; detection; disk; donor; dwarf; emission; et al; field; fig; flares; flux; gamma; high; light; line; long; low; magnetic; magnetosphere; matter; non; nova; observed; optical; outburst; particles; polars; production; radiation; radio; ray; rays; region; source; spectral; state; synchrotron; system; tev; thermal; time
- versions: original; plain text
- ap-1916
- author: Panagia, Nino
- title: SUPERNOVA 1987A: CELEBRATING A SILVER JUBILEE
- date: 2013-12-18
- words: 4466
- flesch: 61
- summary: [33] Manchester, R.N. et al. 2002, PASAu, 19, 207 [34] Maran, S.P. et al. 2000, ApJ, 545, 390 [35] Mattila, S. et al. 2010, ApJ, 717, 1140 [51] Schaefer, B.E. 1987, ApJ, 323, L47 [52] Sonneborn, G., Altner, B., Kirshner, R.P. 1987, ApJ, 323, L35 [53] Sonneborn, G. et al. 1997, ApJ, 477, 848 [54] Sonneborn, G. et al. 1998, ApJ, 492, 139 [55] Staveley-Smith, L. et al. 2007,in
- keywords: aip; apj; bouchet; circumstellar; collapse; conf; core; day; detection; dust; early; eds; ejecta; emission; equatorial; et al; event; evidence; explosion; flux; high; hst; inner; k.w; late; mass; massive; mccray; nature; neutrinos; neutron; new; observations; optical; panagia; proc; progenitor; ray; remnant; ring; star; study; supergiant; supernova; system; times; vol; weiler; years
- versions: original; plain text
- ap-1918
- author: Sasaki, Manami
- title: GALACTIC AND EXTRAGALACTIC SUPERNOVA REMNANTS AS SITES OF PARTICLE ACCELERATION
- date: 2013-12-18
- words: 3073
- flesch: 66
- summary: In Fig. 4 we compare the radial number distribution of X-ray SNRs in M 31 to that of Galactic SNRs and of X-ray SNRs in M 33 Composite image of the remnant of SN 1006 consisting of X-ray data from Chandra in blue, optical data from the University of Michigan’s 0.9 m
- keywords: accelerated; acceleration; acta; addition; chandra; clouds; cosmic; crs; data; distribution; electrons; emission; energies; energy; extragalactic; field; figure; filaments; galactic; galaxy; gas; higher; interstellar; ism; law; magnetic; non; observations; particles; phase; phys; polytechnica; power; radio; ray; rays; remnants; shock; snrs; sources; spectrum; supernova; synchrotron; thermal; waves
- versions: original; plain text
- ap-192
- author: El-Hady, H. M. Abd; Grünwald, A.; Vlčková, K.; Zeithammerová, J.
- title: Clinoptilolite in Drinking Water Treatment for Ammonia Removal
- date: 2001-01-01
- words: 2887
- flesch: 70
- summary: The processes used for the removal of ammonium ions from drinking waters include air stripping, nitrification, breakpoint chlorination, and ion exchange. They are used for various applications, e.g., ion exchange, molecular sieves, and air- -drying.
- keywords: ammonia; ammonium; bed; breakthrough; capacity; clino; clinoptilolite; column; czech; drinking; elution; exchange; fig; ion; ions; mg l; nacl; natural; nh4; regeneration; removal; results; tap; vol; volume; water; zeolite
- versions: original; plain text
- ap-1921
- author: Aschenbach, Bernd
- title: RX-J0852−4622: THE NEAREST HISTORICAL SUPERNOVA REMNANT – AGAIN
- date: 2013-12-18
- words: 3823
- flesch: 66
- summary: Only at X-ray energies > 1.3 keV does Vela Jr. become X-ray visible. From X-ray measurements additional information is ob- tained for an upper limit of the ambient density of n0,x < 0.029 cm−3(d1
- keywords: absorption; ambient; angular; blue; cosmic; density; distance; emission; energy; expansion; explosion; kev; limit; matter; measurements; progenitor; ray; red; shell; shock; snr; tev; upper; vela; vela jr; velocity; wave; wind
- versions: original; plain text
- ap-1923
- author: Ota, Naomi
- title: THE IMPACT OF SUZAKU MEASUREMENTS ON ASTROPARTICLE PHYSICS
- date: 2013-12-18
- words: 4067
- flesch: 64
- summary: Objectives We search for non-thermal hard X-ray emission from merging clusters using Suzaku broad-band X-ray spec- troscopy to reveal the origin of hard X-ray emission and obtain new insight into the gas physics and the cluster dynamical evolution. Aiming at understanding the physics of gas heating/particle acceleration and the cluster dynamical evolution, we search for non-thermal hard X-ray emission from merging clusters, particularly A2163 and the Bullet Cluster, based on the Suzaku and XMM-Newton/Chandra joint analyses.
- keywords: a2163; analysis; apj; band; bullet; clusters; cm−2; component; data; emission; energy; flux; gas; hard; hard x; high; hot; hxd; kev; magnetic; merging; model; multi; newton; non; observations; pasj; present; radio; ray; ray emission; rxte; suzaku; s−1; temperature; thermal; thermal emission; thermal hard; xmm
- versions: original; plain text
- ap-1925
- author: Guainazzi, Matteo
- title: XMM-NEWTON SCIENTIFIC HIGHLIGHTS: X-RAY SPECTROSCOPIC POPULATION STUDIES OF AGN
- date: 2013-12-18
- words: 3906
- flesch: 59
- summary: Only 3 % of Type 1 AGN are X-ray obscured, and 3 % of Type 2 AGN are X-ray unobscured in the XMM-Newton Wide Area Survey (486 objects; Accretion disk inclination angle ı derived from X-ray relativistic spectroscopy on the FERO and GREDOS samples
- keywords: a&a; accretion; acta; agn; angle; apj; class; data; density; different; disk; emission; energy; et al; extent; fig; fraction; galaxies; galaxy; gas; guainazzi; high; host; inclination; innermost; ionized; k.a; kev; line; mnras; newton; objects; observational; parameter; polytechnica; radio; ray; reflection; relativistic; review; samples; scenario; scientific; sight; source; spectra; spectroscopic; structure; studies; systematic; s−1; torus; type; xmm
- versions: original; plain text
- ap-1926
- author: Meintjes, Pieter J.; Nkundabakura, Pheneas
- title: THE SEARCH FOR BLAZARS AMONG THE UNIDENTIFIED EGRET gamma-RAY SOURCES
- date: 2013-12-18
- words: 2052
- flesch: 66
- summary: The spectra of both these sources are shown in Fig. 2 (PKS J0820−5705) and Fig. 3 (PMN J0710−3850), respectively. The spec- trum for PKS J0820−5705 resembles that of an FSRQ at redshift z = 0.06, while the spectrum of PMN J0710−3850 shows broad and narrow lines resembling the spectrum of a LINER or Seyfert I galaxy at redshift z = 0.129.
- keywords: 3eg; acta; blazars; counterparts; distribution; egret; emission; follow; galactic; galaxy; gamma; intranight; j0706−3837; j0710−3850; j0820−5705; j0821−5814; model; optical; pks; pmn; polytechnica; radio; ray; seyfert; sources; spectral; spectrum; ssc; study; unidentified; variability
- versions: original; plain text
- ap-1930
- author: Pittori, Carlotta
- title: AGILE DATA CENTER AT ASDC AND AGILE HIGHLIGHTS
- date: 2013-12-18
- words: 3398
- flesch: 60
- summary: Moreover, AGILE has contributed to the discovery and study of new galactic gamma-ray source classes, of peculiar star systems and of mysterious galactic gamma-ray transients, including the observation that the energy spectrum of terrestrial gamma-ray flashes (TGF) ex- tends well above 40 MeV. The 2012 Bruno Rossi international Prize was awarded to the PI, Marco Tavani, and the AGILE team for the discovery of rapid gamma-ray flares over daily timescales from the Crab Nebula, thought to be a steady enough source of energy in all wavebands from optical to gamma rays [15]. The AGILE Data Center, part of the ASI Science Data Center (ASDC) located in Frascati, Italy, is in charge of all the science oriented activities related to the analysis, archiving and distribution of AGILE data.
- keywords: acceleration; adc; agile; asdc; asi; center; crab; cygnus; data; detection; discovery; emission; energies; energy; et al; fermi; figure; flares; flux; galactic; gamma; gev; grid; ground; hard; high; instrument; kev; mev; nebula; observations; pointing; pulsar; range; ray; rays; references; science; sky; source; system; tavani; team; vol; wind; years
- versions: original; plain text
- ap-1933
- author: Di Sciascio, Giuseppe
- title: ARGO-YBJ: STATUS AND HIGHLIGHTS
- date: 2013-12-18
- words: 4350
- flesch: 69
- summary: Five known VHE γ-ray sources were detected with a statistical significance greater than 5 standard deviations (s.d.), i.e. Crab Nebula, Mrk421, Mrk501, MGRO J1908+06 and MGRO J2031+41. the signal significance is 4.1 s.d. (pre-trial), while 1.0 s.d. is expected from the steady flux [11].
- keywords: analysis; anisotropy; argo; bartoli; cm−2; consistent; crab; data; days; emission; energies; energy; et al; events; excess; experiment; figure; flare; flux; j1908; j2019; j2031; measured; measurements; mgro; milagro; mjd; nebula; observation; range; ray; region; results; s.d; scale; significance; source; spectrum; statistical; steady; s−1; tev; time; ybj
- versions: original; plain text
- ap-1935
- author: Brenneman, Laura
- title: MEASURING SUPERMASSIVE BLACK HOLE SPINS IN AGN
- date: 2013-12-18
- words: 4998
- flesch: 69
- summary: [27] have done, re- quires the compTT component to possess significant curvature up into the Fe K band, reducing the need for the relativistic reflection to account for this same curvature seen in the data and thereby eliminating the requirement of high BH spin. Conclusions and future directions Measuring BH spin is painstaking work, even with the best data from current observatories such as XMM- Newton and Suzaku.
- keywords: absorption; accretion; agn; astr; astrophys; bh spin; black; brenneman; broad; continuum; data; different; disk; distribution; emission; energies; energy; et al; excess; fit; gas; high; hole; host; inner; kev; line; local; modeling; models; mon; ngc; observation; order; power; ray; recent; reflection; reynolds; sample; smbh; soc; soft; spectrum; spin; supermassive; suzaku; type; values; xis; xmm
- versions: original; plain text
- ap-1936
- author: Díaz Trigo, Maria; Boirin, Laurence
- title: DISC ATMOSPHERES AND WINDS IN X-RAY BINARIES
- date: 2013-12-18
- words: 4942
- flesch: 59
- summary: These observations are in agreement with models of photoionised winds by Sim et al. In contrast, the same X-rays that prevent UV line opacity can heat low density gas to a temperature ∼ 107 K and potentially drive thermal winds.
- keywords: a&a; absorption; accretion; apj; atmospheres; binaries; boirin; broad; column; compton; consistent; corona; disc; díaz; emission; et al; features; high; iron; launching; line; lmxbs; luminosity; magnetic; mass; mechanism; observations; outflow; photoionised; plasma; presence; radius; ray; scattering; showing; sources; state; systems; thermal; trigo; velocity; wind
- versions: original; plain text
- ap-1939
- author: Ziółkowski, Janusz
- title: POPULATION OF BLACK HOLES IN THE MILKY WAY AND IN THE MAGELLANIC CLOUDS
- date: 2013-12-18
- words: 5168
- flesch: 70
- summary: Introduction Our Galaxy (MW) contains one supermassive BH (SgrA*), a small number (between zero and a few tens) of intermediate mass BHs (IMBHs) and about 107 to 108 stellar mass BHs (SM BHs). BH candidates from microlensing events Microlensing events are, at present, the only method for detecting solitary stellar mass BH candidates (BHCs).
- keywords: a.c; analysis; apj; bhcs; bhs; binaries; black; candidates; cluster; companion; continuum; cyg; estimates; events; fabian; gcs; grs; high; hole; line; luminosity; mass; mass bhs; masses; massive; mcclintock; mcs; method; miller; modeling; nature; object; possible; ray; recent; results; rotating; sgra; source; spin; steiner; stellar; system; unseen; value; xrbs; xte; x−1; years
- versions: original; plain text
- ap-194
- author: Prokopska, A.
- title: Application of Morphological Analysis Methodology in Architectural Design
- date: 2001-01-01
- words: 3924
- flesch: 47
- summary: In morphological analysis method, the examination of fragments of reality or their design, and regarding these fragments as a whole composed of various parts (e.g., architectural forms), corresponds with the modern level of complexity of design processes as intellectual processes, and the complexity of the design of technical objects, including architectural objects. 3 Selected procedures of morphological analysis Morphological analysis was introduced by Fritz Zwicky [8–10], an astronomer3 who succesfully used this method, a pioneer of the construction of reaction engines.
- keywords: acta; analysis; app; approach; architectural; architectural design; art; combinations; complexity; czech; design; development; example; features; fig; form; house; http://ctn.cvut.cz/ap/; knowledge; level; lull; matrix; method; methodology; morphological; morphological analysis; new; no.1/2001; number; objects; point; polish; polytechnica; possible; problem; process; processes; publishing; science; set; solutions; structure; study; system; systemic; technical; university; values; vol; zwicky
- versions: original; plain text
- ap-1940
- author: Beall, James H.
- title: FROM GALACTIC TO EXTRAGALACTIC JETS: A REVIEW
- date: 2013-12-18
- words: 4556
- flesch: 60
- summary: Concurrent radio and X-ray variability of Centaurus A (NGC 5128) as an indication of jet launch or jet–cloud interactions? The picture that emerges, therefore, is consis- tent with the observations of spatially and temporally resolved galactic microquasars and AGN jets.
- keywords: 3c454.3; acceleration; accretion; agn; ambient; astron; astrophys; beall; behavior; blobs; cen; complex; concurrent; consistent; core; cosmic; data; der; different; disk; energy; et al; evolution; frequencies; galactic; ghz; high; interaction; j.h; jet; jets; laan; medium; microquasars; moving; multifrequency; observations; radio; ray; region; remarkable; scales; source; structures; time; van; variability
- versions: original; plain text
- ap-1942
- author: Bisnovatyi-Kogan, Gennady; Klepnev, Alexandr S.; Lovelace, Richard V.E.
- title: ACCRETION DISKS WITH A LARGE SCALE MAGNETIC FIELD AROUND BLACK HOLES
- date: 2013-12-18
- words: 4420
- flesch: 57
- summary: Jets are observed in objects with black holes: collimated ejection from accretion disks. The standard model for accretion disks of Shakura and Sunyaev
- keywords: accretion; accretion disk; advection; artemova; bisnovatyi; black; conductivity; cylinder; diffusion; disk; equations; field; formation; g.s; high; holes; inner; jet; kogan; large; lovelace; magnetic; magnetic field; magneto; matter; model; non; optical; oscillations; outer; poloidal; radial; radiative; region; rotating; scale; solution; state; stationary; structure; surface; temperature; thickness; thin; time; turbulent; velocity; vertical; viscosity
- versions: original; plain text
- ap-1945
- author: Beall, J. H.; Guillory, J.; Rose, D. V.; Wolff, Michael T.
- title: MODELING JET INTERACTIONS WITH THE AMBIENT MEDIUM
- date: 2013-12-18
- words: 2981
- flesch: 52
- summary: Solving the system of equations yields a time-dependent set of normal- ized wave energies (i.e., the ratio of the wave energy divided by the thermal energy of the plasma) that are generated as a result of jets interaction with the ambient medium. Recent high-resolution (see, e.g., [13]) observations of astrophysical jets reveal complex structures apparently caused by ejecta from the central engine as the ejecta interact with the surrounding interstellar material.
- keywords: ambient; ambient medium; ap.j; astrophysical; beall; beam; code; d.v; density; deposition; detailed; effects; electron; energy; equations; figure; guillory; hydrodynamic; instability; interaction; j.h; jet; jets; large; length; loss; medium; model; momentum; pic; plasma; population; processes; rate; relativistic; rose; scale; simulations; transfer; wave
- versions: original; plain text
- ap-1946
- author: Amati, Lorenzo; Dichiara, Simone
- title: INVESTIGATING THE Ep, i –Eiso CORRELATION
- date: 2013-12-18
- words: 4856
- flesch: 54
- summary: Fermi GRBs are marked with red (GBM detection) and blue (GBM + LAT detec- tion) color. Moreover, [6] showed that the normalization of the correlation varies only marginally using GRBs measured by individual instru- ments with different sensitivities and energy bands, 689 Lorenzo Amati, Simone Dichiara Acta Polytechnica Figure 2. Location of Fermi GRBs in the Ep – fluence plane based on the analysis reported by Nava et al.
- keywords: addition; amati; analysis; apj; band; consistent; correlation; cosmological; data; different; eiso; eiso correlation; emission; energetic; energy; estimates; events; evidence; fermi; fermi grbs; fluence; function; gbm; gev; grbs; law; limits; long; long grbs; measured; measurements; observed; parameters; peak; physics; plane; power; prompt; properties; redshift; sample; short; significant; spectral; sub; swift
- versions: original; plain text
- ap-1948
- author: Stanev, Todor
- title: ULTRAHIGH ENERGY COSMIC RAYS: REVIEW OF THE CURRENT SITUATION
- date: 2013-12-18
- words: 3602
- flesch: 66
- summary: Keywords: high energy cosmic rays, hadronic interaction at very high energy, origin of the highest energy cosmic rays. The Telescope Array also presented [12] the distri- butions of Xmax in the energy bins shown in Fig. 3. At relatively low energy, the widths of the distribu- tions were more similar to proton showers, while at high energy the statistics is not enough to judge the distributions. 2.3.
- keywords: array; auger; chemical; composition; correlation; cosmic; data; detectors; different; energy; energy cosmic; energy spectrum; events; experiments; field; figure; fluorescent; heavy; high; highest; hires; measured; measurements; new; nuclei; rays; results; showers; sources; spectrum; statistics; surface; surface array; telescope; telescope array; uhecr; view; xmax
- versions: original; plain text
- ap-1951
- author: Grillo, Aurelio F.
- title: THE MASS COMPOSITION OF ULTRA HIGH ENERGY COSMIC RAYS
- date: 2013-12-18
- words: 3122
- flesch: 59
- summary: Xmax (upper panel) and RMS(Xmax) com- pared with predicted values for pure compositions in different interaction models. The most used shower observables for studying the composition of Ultra High Energy Cosmic Rays (UHECR) are the mean value of the depth of shower maximum, 〈Xmax〉, and its dispersion, σ(Xmax).
- keywords: auger; average; composition; cosmic; data; detector; different; energies; energy; fig; figure; general; groups; high; interaction; iron; larger; mass; measurements; models; nuclei; observatory; particle; pierre; plot; proc; proton; pure; range; rays; shower; sources; spectrum; ultra; values; variance; xmax; σ(xmax
- versions: original; plain text
- ap-1953
- author: Aloisio, Roberto
- title: COMPUTATIONAL SCHEMES FOR THE PROPAGATION OF ULTRA HIGH ENERGY COSMIC RAYS
- date: 2013-12-18
- words: 3043
- flesch: 57
- summary: One should distin- guish between primary nuclei, i.e. nuclei accelerated at the source and injected in the intergalactic space, and secondary nuclei and nucleons, i.e. particles pro- duced as secondaries in the photo-disintegration chain. In particular, the flux of secondary nuclei and nucleons produced in the photo-disintegration 705 Roberto Aloisio Acta Polytechnica chain of primary A0 is obtained by the numerical computation of A0 nested integrals and this computa- tion should be repeated each time the hypothesis on sources (injection and distribution) is changed.
- keywords: aloisio; approach; backgrounds; case; cmb; computation; different; disintegration; distribution; energies; energy; equation; flux; injection; kinetic; nuclei; nucleus; pair; particles; photo; phys; primary; process; production; propagation; protons; red; schemes; secondary; shift; sources; spectrum; uhecr
- versions: original; plain text
- ap-1954
- author: Petrukhin, Anatoly A.
- title: INFLUENCE OF THE RESULTS OF UHECR DETECTION ON THE LHC EXPERIMENTS
- date: 2013-12-18
- words: 3514
- flesch: 59
- summary: The cosmic ray energy region 1015 ÷ 1017 eV corresponds to LHC energies 1 ÷ 14 TeV in the center-of-mass system. Of course, there are many tasks connected with investigations of hadron-hadron interactions at LHC energies, tests of existing theoretical models be- havior at such energies, etc.
- keywords: approach; change; composition; cosmic; eas; energies; energy; evidence; excess; experiments; fig; figure; increase; interaction; investigations; knee; large; lhc; mass; matter; model; muons; new; nuclear; nuclei; number; observed; parameters; particles; physical; physics; possible; primary; production; qgm; quark; ray; results; spectrum; state; system; tev
- versions: original; plain text
- ap-1957
- author: Bruno, A.; Adriani, O.; Barbarino, G. C.; Bazilevskaya, G. A.; Bellotti, R.; Boezio, M.; Bogomolov, E. A.; Bongi, M.; Bonvicini, V.; Borisov, S.; Bottai, S.; Cafagna, F.; Campana, D.; Carbone, R.; Carlson, P.; Casolino, M.; Castellini, G.; Consiglio, L.; De Pascale, M. P.; De Santis, C.; De Simone, N.; Di Felice, V.; Galper, A. M.; Gillard, W.; Grishantseva, L.; Jerse, G.; Karelin, A. V.; Kheymits, M. D.; Koldashov, S. V.; Krutkov, S. Y.; Kvashnin, A. N.; Leonov, A.; Malakhov, V.; Marcelli, L.; Mayorov, A. G.; Menn, W.; Mikhailov, V. V.; Mocchiutti, E.; Monaco, A.; Mori, N.; Nikonov, N.; Osteria, G.; Palma, F.; Papini, P.; Pearce, M.; Picozza, P.; Pizzolotto, C.; Ricci, M.; Ricciarini, S. B.; Rossetto, L.; Sarkar, R.; Simon, M.; Sparvoli, R.; Spillantini, P.; Stozhkov, Y. I.; Vacchi, A.; Vannuccini, E.; Vasilyev, G.; Voronov, S. A.; Yurkin, Y. T.; Wu, J.; Zampa, G.; Zampa, N.; Zverev, V. G.
- title: PRECISE COSMIC RAYS MEASUREMENTS WITH PAMELA
- date: 2013-12-18
- words: 3864
- flesch: 60
- summary: PAMELA data are consistent with those of other ex- periments, considering the statistical and systematic uncertainties of the various experiments [7, and refer- ences therein]. [24] and PAMELA data, respec- 715 A. Bruno et al.
- keywords: adriani; antimatter; antiprotons; cosmic; data; department; electron; energy; et al; existence; experiments; figure; flux; gev; helium; infn; interval; italy; lett; measured; measurements; models; modulation; nuclei; pamela; particles; phys; physics; positron; predictions; production; propagation; radiation; range; ratio; rays; references; results; rev; rigidity; secondary; sezione; solar; sources; spectra; spectrum; standard; university
- versions: original; plain text
- ap-196
- author: Haghi, A. K.
- title: Experimental Investigations on Drying of Porous Media Using Infrared Radiation
- date: 2001-01-01
- words: 1629
- flesch: 56
- summary: Keywords: infrared dryer, porous media, drying rate, image analysis Table 1: Fabrics used in the drying study FABRIC FIBER WEIGHT, g/m2 A COTTON 130 B POLYESTER 150 In the drying process, water is evaporated from the ex- posed yarn surfaces and replaced by water migration from within the fabric structure. [7]: � �EVAP H H SLDi f� � (1) Where S = speed of fabric in the oven (m/s), L = fabric width (m), D = superficial weight of dry fabric (g/m2).
- keywords: analysis; constant; content; dryer; drying; element; evaporation; fabric; haghi; heat; image; infrared; moisture; object; period; processing; rate; romania; study; surface; temperature; textile; thermal; time; university; water
- versions: original; plain text
- ap-1961
- author: Erlykin, Anatoly D.; Wolfendale, Arnold W.
- title: DO WE SEE THE ‘IRON PEAK’?
- date: 2013-12-18
- words: 2747
- flesch: 72
- summary: Keywords: cosmic rays, knee, single source, iron peak. References [1] Abbasi R.U. et al., 2009, Astropart.
- keywords: 32nd; background; beijing; cno; composition; conf; contribution; cosmic; energy; erlykin; fig; fine; int.cosm.ray; iron; knee; mass; model; nuclei; origin; peak; pev; region; shape; sharpness; single; single source; source; spectra; spectrum; structure
- versions: original; plain text
- ap-1963
- author: Chiavassa, A.; Apel, W. D.; Arteaga-Velázquez, J. C.; Bekk, K.; Bertaina, M.; Blümer, J.; Bozdog, H.; Brancus, I. M.; Cantoni, E.; Cossavella, F.; Daumiller, K.; de Souza, V.; Di Pierro, F.; Doll, P.; Engel, R.; Engler, J.; Finger, M.; Fuchs, B.; Fuhrmann, D.; Garino, F.; Gils, H. J.; Glasstetter, R.; Grupen, C.; Haungs, A.; Heck, D.; Hörandel, J. R.; Huber, D.; Huege, T.; Kampert, K.-H.; Kang, D.; Klages, H. O.; Link, K.; Łuczak, P.; Ludwig, M.; Mathes, H. J.; Mayer, H. J.; Melissas, M.; Milke, J.; Mitrica, B.; Morello, C.; Oehlschläger, J.; Ostapchenko, S.; Palmieri, N.; Petcu, M.; Pierog, T.; Rebel, H.; Roth, M.; Schieler, H.; Schoo, S.; Schröder, F. G.; Sima, O.; Toma, G.; Trinchero, G. C.; Ulrich, H.; Weindl, A.; Wochele, J.; Wommer, M.; Zabierowski, J.
- title: DETECTION OF A CHANGE OF SLOPE IN THE SPECTRUM OF HEAVY MASS COSMIC RAYS PRIMARIES BY THE KASCADE-GRANDE EXPERIMENT
- date: 2013-12-18
- words: 2148
- flesch: 62
- summary: Keywords: cosmic rays, energy spectrum, extensive air showers. Reconstructed energy spectrum of the electron-poor and electron-rich components together with the all-particle spectrum for the angular range 0°
- keywords: change; cic; collaboration; cosmic; eas; energy; events; experiment; feature; für; germany; gev; grande; heavy; institut; kascade; knee; light; like; mass; nch; number; phys; primaries; primary; range; rays; shower; slope; spectrum; university
- versions: original; plain text
- ap-1965
- author: Tricomi, Alessia
- title: RESULTS FROM LHCF EXPERIMENT
- date: 2013-12-18
- words: 2814
- flesch: 61
- summary: HE] [3] A. Chiavassa, this Workshop [4] O. Adriani et al., JINST 3 (2008) S08006 [6] O. Adriani et al., accepted in Phys.
- keywords: analysis; arm1; arm2; cm2; collaboration; collisions; cosmic; data; detectors; different; dpmjet; energy; experiment; figure; gev; hadronic; interaction; lhcf; measurements; models; neutral; order; photon; physics; position; rapidity; region; results; showers; spectra; tev; transverse
- versions: original; plain text
- ap-1966
- author: van Putten, Maurice H.P.M.
- title: SEARCH FOR GRAVITATIONAL WAVES FROM SUPERNOVAE AND LONG GRBS
- date: 2013-12-18
- words: 4624
- flesch: 59
- summary: We report on evidence for black hole spindown in the light curves of the BATSE catalogue of 1491 long GRBs by application of matched filtering. According to the Kerr metric, the angular momen- tum of rotating black holes induces frame dragging.
- keywords: accretion; angular; baryon; batse; black; black hole; curve; deviation; disk; dragging; emission; energetic; energy; engine; events; figure; filtering; frame; gravitational; grbs; high; hole; hyper; inner; isco; kerr; light; long; long grbs; luminosity; m.h.p.m; magnetic; mass; matter; model; momentum; neutron; nlc; normalized; outflows; phys; pns; poor; putten; radiation; rotation; spin; spindown; stars; supernovae; t90; template; time; torus; van; velocity; waves
- versions: original; plain text
- ap-1968
- author: Milano, L.; Calloni, E.; De Rosa, R.; De Laurentis, M.; Di Fiore, L.; Garufi, F.
- title: THE PAST AND THE FUTURE OF DIRECT SEARCH OF GW FROM PULSARS IN THE ERA OF GW ANTENNAS
- date: 2013-12-18
- words: 2867
- flesch: 71
- summary: [2] Accadia T. et al.: 2012 Journal of Instrumentation 7 P03012 [3] Abbott B P et al.: 2009 Rep. Prog. 27 084005 [31] G.B.Hobbs, et al: 2009 Publ.
- keywords: advanced; class; crab; detection; detectors; direct; emission; energy; eos; et al; frequency; future; grav; gravitational; gws; interferometric; ligo; limit; napoli; past; phys; present; pulsars; quantum; results; rev; search; searches; sensitivity; upper; virgo; waves
- versions: original; plain text
- ap-1971
- author: Martini, M.; Dell’Agnello, S.; Currie, D.; Delle Monache, G. O.; Vittori, R.; Berardi, S.; Boni, A.; Cantone, C.; Ciocci, E.; Lops, C.; Garattini, M.; Maiello, M.; Patrizi, G.; Tibuzzi, M.; Intaglietta, N.; Chandler, J.; Bianco, G.
- title: MOONLIGHT: A NEW LUNAR LASER RANGING RETROREFLECTOR AND THE LUNAR GEODETIC PRECESSION
- date: 2013-12-17
- words: 2649
- flesch: 52
- summary: Since the 1970s Lunar Laser Ranging (LLR) to the Apollo Cube Corner Retroreflector (CCR) arrays (developed by the University of Maryland, UMD) supplied almost all significant tests of General Relativity (Alley et al., 1970; Chang et al., 1971; Bender et al.,1973): possible changes in the gravitational constant, gravitational self-energy, weak equivalence principle, geodetic precession, inverse-square force-law. Space Res. 37(1), 67–71, 2006; Lunar laser ranging science: gravitational physics and lunar interior and geodesy
- keywords: accuracy; acta; apollo; arrays; ccr; characterization; currie; data; dell’agnello; earth; error; geodetic; gravitational; infn; laser; librations; llr; lnf; lunar; lunar laser; measurement; moonlight; new; payload; precession; relativity; retroreflector; satellite; scf; science; scientific; space; station; test; value; williams; years
- versions: original; plain text
- ap-1973
- author: Grieder, Peter K. F.
- title: RECENT DEVELOPMENTS IN ULTRA-HIGH ENERGY NEUTRINO ASTRONOMY
- date: 2013-12-18
- words: 3835
- flesch: 63
- summary: [43] Mangano, S.: 2011, Proc. ICRC HE2.3, 118 [44] Mannheim, K. et al.: 2000, P.R. D 63, 023003 53 supplement/2013 Recent Developments in Ultra-High Energy Neutrino Astronomy [49] Münch, K. et al.: 2005, Proc.
- keywords: acoustic; air; astronomy; astrop; attenuation; cherenkov; cosmic; deep; details; detection; detector; different; emission; energy; et al; events; expected; experiments; fig; flavors; fluorescence; gzk; hadron; he2.3; high; ice; icecube; icrc; large; length; muon; neutrino; optical; p.r; p.r.l; pao; phys; primary; proc; radio; reaction; recent; showers; source; spectrum; target; telescopes; uhe; water
- versions: original; plain text
- ap-1974
- author: Maldera, S.
- title: LIMIT ON UHE NEUTRINO FLUXES FROM THE PIERRE AUGER OBSERVATORY
- date: 2013-12-18
- words: 3096
- flesch: 59
- summary: Exposure of the surface detector for ES and DG neutrino induced showers, corresponding re- spectively to 3.5 and 2 years of the complete and fully efficient surface detector (the deployment of the SD was concluded by the end of 2008). References [1] F. Halzen et al., Reports on Progress in Physics 65, (2002) 1025 [2] L. Anchordoqui, T.Montaruli, Annual Review of Nuclear and Particle Science 60, (2010) 129–162
- keywords: analysis; auger; c.l; case; collaboration; declination; detector; earth; energy; exposure; flux; ground; icecube; identification; large; limits; neutrino; observatory; physics; pierre; point; review; selection; showers; signal; single; skimming; source; stations; surface; tau; time; trigger; uhe; upper; zenith
- versions: original; plain text
- ap-1977
- author: Ronga, Francesco
- title: ANALYSIS OF THE MACRO EXPERIMENT DATA TO COMPARE PARTICLE ARRIVAL TIMES UNDER GRAN SASSO
- date: 2013-12-18
- words: 2917
- flesch: 66
- summary: Difference between track time and average time for multiple parallel muons with 2 or 3 tracks as function of cos(θ). Difference between track time and average time for multiple muons with 2 or 3 tracks (continuos line) compared with a “simulation” using the data (dashed line).
- keywords: analysis; average; cascade; collaboration; cos(θ; cosmic; data; decay; detector; differences; different; energy; events; experiment; figure; gran; horizontal; macro; massive; multiple; muons; neutrino; new; opera; particles; phys; primary; ray; region; result; sasso; scintillator; streamer; study; supermodules; tev; time; tracks; underground; vertical
- versions: original; plain text
- ap-198
- author: Kratěna, J.; Fořt, I.; Brůha, O.
- title: Dynamic Effect of Discharge Flow of a Rushton Turbine Impeller on a Radial Baffle
- date: 2001-01-01
- words: 3594
- flesch: 61
- summary: (2) can be rearranged into the form � �� � � � �Q T w Mb t b b d th2 , , , , (3) where quantity Mb d th, , represents a theoretically considered portion of the time averaged (mean) torsional moment of the baffles corresponding to the area of the force interaction of the force action of the impeller discharge stream and the baf- fle (see shaded area below the curves in Figs. 6 and 7). 8) from the axis of symmetry of the cylindrical mix- ing vessel: � � � �R T bb � �2 2 3 .
- keywords: agitated; baffles; blade; component; cylindrical; czech; dimensionless; discharge; disk; dynamic; fig; flow; force; height; impeller; impeller discharge; liquid; mean; mixing; moment; peripheral; pressure; radial; reaction; region; rushton; standard; stream; target; turbine; vessel
- versions: original; plain text
- ap-1983
- author: Desiati, Paolo
- title: ICECUBE OBSERVATORY: NEUTRINOS AND THE ORIGIN OF COSMIC RAYS
- date: 2013-12-18
- words: 4743
- flesch: 58
- summary: At the same time, IceCube has accumulated a large number of cosmic ray induced neutrinos produced in the at- mosphere, making it possible to probe the combined effect of hadronic interaction models, cosmic ray spec- trum and composition on the neutrino spectrum up to a few hundred TeV [10]. The completed IceCube Observatory, the first km3 neutrino telescope, is already providing the most stringent limits on the flux of high energy cosmic neutrinos from point-like and diffuse galactic and extra-galactic sources.
- keywords: abbasi; accelerated; acceleration; anisotropy; apj; array; astropart; atmospheric; background; bahcall; bundles; configuration; cosmic; cosmic rays; current; data; detection; detector; diffuse; energies; energy; et al; events; experimental; figure; flux; galactic; galaxy; gev; hadronic; hemisphere; high; icecube; large; limits; magnetic; models; muon; neutrinos; observations; observatory; origin; particle; phys; possible; rays; rev; scale; search; sensitivity; sky; snr; sources; spectrum; tev; time; upper; waxman
- versions: original; plain text
- ap-1984
- author: Farnese, Christian
- title: NEUTRINOS FROM ICARUS
- date: 2013-12-18
- words: 3518
- flesch: 56
- summary: Neutrino time of flight measurement with the 2011 CNGS bunched beam From October 21st to November 6th 2011 the CERN CNGS neutrino beam has been operated in a new, lower intensity mode that allows a very accurate neu- trino time of flight measurement on an event by event basis. In particular for CNGS neutrino events, using the “Early Warning Signal” sent from CERN to LNGS 80 ms be- fore each proton extraction, a 60 µs gate is open at the expected proton extraction time, and the trigger is gen- erated when the PMT sum signal is present in at least one TPC chamber within the gate.
- keywords: argon; beam; cern; cngs; cngs neutrino; collab; corresponding; detector; drift; e+e−; electron; energy; events; expected; figure; gev; high; icarus; icarus t600; interaction; lar; liquid; lngs; measurement; muon; neutrino; neutrino beam; neutrino events; new; order; p.o.t; pairs; physics; pmt; proton; run; search; signal; spectrometers; sterile; system; t600; thanks; time; tpc; trigger
- versions: original; plain text
- ap-1986
- author: Tomei, Claudia
- title: STATUS OF THE CUORE EXPERIMENT
- date: 2013-12-18
- words: 2775
- flesch: 64
- summary: CUORE bolometers [10, 11] are tellurium dioxide crystals. A small tower assembled using CUORICINO crystals (completely reprocessed according to the CUORE standard) was operated underground at LNGS, inside the CUORI- CINO cryostat, to measure the surface activity of the mounting structure
- keywords: 0νββ; 130te; array; assembly; background; beta; bolometers; construction; copper; cryogenic; cryostat; crystals; cuore; cuore-0; cuoricino; decay; detector; double; energy; experiment; half; kev; laboratory; lngs; low; majorana; mass; national; neutrino; nuclear; phase; rare; region; search; status; structure; surface; system; temperature; tower; value
- versions: original; plain text
- ap-1991
- author: Ferroni, Fernando
- title: NEUTRINOLESS DOUBLE BETA DECAY: AN EXTREME CHALLENGE
- date: 2013-12-18
- words: 1725
- flesch: 59
- summary: The problem The challenge is in the very fact that the sensitivity of this kind of experiment, as previously seen, improves only with the square root of the selected isotope mass, running time, decrease of background index and im- provement of energy resolution. Also background level (b) and energy resolution (ΔE) behaves as a square root.
- keywords: acta; background; beta; bolometer; decay; double; electrons; energy; experiment; fig; heat; light; lucifer; majorana; mass; nature; neutrino; neutrinoless; particles; phys; physics; possibility; problem; process; region; resolution; rev; value
- versions: original; plain text
- ap-1992
- author: Boller, Thomas
- title: EROSITA: AGN SCIENCE, BACKGROUND DETERMINATION, AND OPTICAL FOLLOW-UP SPECTROSCOPY
- date: 2013-12-18
- words: 3949
- flesch: 62
- summary: The expected background count rate has been compared with XMM-Newton observations, which might provide the best test for the X-ray back- ground for eROSITA around the Lagrangian point L2 before real X-ray background data will become available. Keywords: X-ray mission: new, spectroscopy.
- keywords: 4fs; accretion; agn; agns; background; black; boller; cluster; components; count; data; emission; energy; erosita; erosita background; fiber; follow; fraction; galaxies; growth; high; hole; instrument; large; mnras; multi; newton; nls1; objects; observations; observed; optical; particle; photon; physics; rates; ray; scale; science; simulated; simulator; sky; spectral; spectroscopic; strong; studies; study; survey; s−1; telescope; xmm
- versions: original; plain text
- ap-1993
- author: Hudec, René; Šimon, Vojtech; Hudec, Lukáš
- title: GRB INVESTIGATIONS BY ESA GAIA AND LOFT
- date: 2013-12-18
- words: 2966
- flesch: 61
- summary: 53 supplement/2013 GRB Investigations by ESA Gaia and LOFT the algorithms developed for the plates for Gaia. The ESA Gaia satellite to be launched in November 2013 will focus on high precision astrometry of stars and all objects down to limiting magnitude 20.
- keywords: afterglows; color; czech; data; detection; dispersion; emission; energy; esa; gaia; galaxy; gamma; grbs; high; hudec; important; loft; low; oas; objects; optical; phase; photometry; pixel; plates; possible; prism; range; ray; resolution; sources; spectral; spectroscopy; stars; studies; study; surveys; time
- versions: original; plain text
- ap-1994
- author: Maeda, Yoshitomo; Takahashi, Tadayuki; Mitsuda, Kazuhisa; Kelley, Richard
- title: THE ASTRO-H MISSION
- date: 2013-12-18
- words: 2074
- flesch: 69
- summary: SXI will consist of a telescope (SXT-I) and the focal plane detector “Soft X-ray Imager” [12] H. Tsunemi et al., “Soft X-ray imager (SXI) onboard ASTRO-H”, Proc. SPIE, 8443, submitted (2012)
- keywords: acta; arcmin; area; astro; band; compton; detector; effective; energy; gamma; hard; high; hxi; imager; imaging; instruments; kev; mission; polytechnica; proc; ray; resolution; sgd; soft; sources; spectrometer; spie; sxi; sxs; sxt; telescope
- versions: original; plain text
- ap-1996
- author: Yashin, I. I.; Ampilogov, N. V.; Astapov, I.I.; Barbashina, N.S.; Borog, V.V.; Dmitrieva, A.N.; Kokoulin, R.P.; Kompaniets, K.G.; Mannocchi, G.; Mikhailenko, A.S.; Petrukhin, A.A.; Saavedra, O.; Shutenko, V.V.; Trinchero, G.; Yakovleva, E.I.
- title: LARGE AREA HODOSCOPES FOR MUON DIAGNOSTICS OF HELIOSPHERE AND EARTH’S MAGNETOSPHERE
- date: 2013-12-18
- words: 2352
- flesch: 62
- summary: Keywords: cosmic rays, muons, muon hodoscope, angular variations of muon flux, solar, terrestrial connections, heliosphere, magnetosphere. To study muon flux variations, for every cell of the angular matrix the average number of muons (esti- mated during the preceding 24 hours and corrected for atmospheric pressure and temperature
- keywords: acta; analysis; angular; anisotropy; average; cosmic; counting; data; diagnostics; directions; earth; figure; flux; gse; heliosphere; hodoscopes; jul; local; magnetosphere; matrix; muon; n.s; polytechnica; processes; rate; rays; solar; time; uragan; variations; vector; wide; zenith
- versions: original; plain text
- ap-1998
- author: Bertaina, Mario; Ebisuzaki, Toshikazu; Galeotti, Piero; Kajino, Fumiyoshi
- title: THE JEM-EUSO MISSION
- date: 2013-12-18
- words: 2127
- flesch: 62
- summary: Introduction The Extreme Universe Space Observatory – EUSO is the first space mission devoted to exploring the Universe through the detection of the extreme energy (E > 50 EeV) cosmic rays (EECRs) and neutrinos [1– 5]; it looks downward from the International Space Station (ISS). The JEM-EUSO mission explores the origin of extreme energy cosmic rays (EECRs) above 50 EeV and explores the limits of fundamental physics, through observations of their arrival directions and energies.
- keywords: 32nd; arrival; atmosphere; case; clouds; collab; cosmic; eecrs; energies; energy; euso; experiment; exposure; extreme; figure; high; ibidem; icrc; jem; main; mission; nuclear; objectives; physics; proc; rays; scientific; shower; sources; space; surface; telescope
- versions: original; plain text
- ap-200
- author: John, J.
- title: Nonlinear Continuous System Identification by Means of Multiple Integration II
- date: 2001-01-01
- words: 3783
- flesch: 71
- summary: The differential equation for the system dynamics is � �e =Ri N t e �� � � �d d , (18) where e � � � is the induced voltage, � is the machine flux, N t d d � is the voltage induced by the change of the machine flux in the excitation winding, and Rie is the voltage drop on the resistance in the excitation circuit. i n i n � � � � � � 1 1 2 1u u � (1) and an output equation � � � �� � � � � �� �y t
- keywords: algebraic; continuous; corresponding; czech; d �; data; diagram; dynamo; e t; e �; equation; f t; fig; function; identification; input; integration; matrix; model; multiple; n t; nonlinear; output; parameters; period; program; r.*e./ �; space; state; structure; system; t t; t y; time; vector; � g; � y; � �
- versions: original; plain text
- ap-2000
- author: Antonelli, Antonella
- title: THE NA62 EXPERIMENT AT CERN AND THE MEASUREMENT OF THE ULTRA-RARE DECAY K⁺→π⁺ v ̄v
- date: 2013-12-18
- words: 2052
- flesch: 67
- summary: [3] P. Valente et al., Nucl. [4] M. Fiorini et al., Nucl.
- keywords: angle; background; beam; branching; calorimeter; cern; cherenkov; counter; decay; experiment; gev; high; instrum; kaon; large; lav; level; meth; momentum; mrad; muon; na62; nucl; order; particle; photons; ratio; readout; rejection; resolution; rich; spectrometer; system; time; trigger; veto
- versions: original; plain text
- ap-2002
- author: March, Riccardo; Bellettini, Giovanni; Tauraso, Roberto; Dell’Agnello, Simone
- title: CONSTRAINING SPACETIME TORSION WITH THE MOON, MERCURY AND LAGEOS
- date: 2013-12-18
- words: 2775
- flesch: 64
- summary: Hence such a mission may yield an opportunity to improve of the constraints on torsion parameters. As a consequence, spacetime torsion would be observation- ally negligible in the solar system.
- keywords: acta; autoparallel; bodies; body; case; coordinates; earth; effect; estimates; general; geodetic; lageos; lense; mass; mercury; moon; new; parameters; perihelion; phys; precession; relativity; rev; roma; secular; solar; spacetime; system; tensor; test; theory; thirring; torsion; γνλµ
- versions: original; plain text
- ap-2003
- author: Garattini, M.; Dell’Agnello, S.; Currie, D.; Delle Monache, G. O.; Tibuzzi, M.; Patrizi, G.; Berardi, S.; Boni, A.; Cantone, C.; Itaglietta, N.; Lops, C.; Maiello, M.; Martini, M.; Vittori, R.; Bianco, G.; March, R.; Bellettini, G.; Tauraso, R.
- title: MOONLIGHT: A NEW LUNAR LASER RANGING RETROREFLECTOR INSTRUMENT
- date: 2013-12-17
- words: 2561
- flesch: 51
- summary: Since 1969 Lunar Laser Ranging (LLR) to the Apollo Cube Corner Reflector (CCR) arrays has supplied several significant tests of gravity: Geodetic Precession, the Strong and Weak Equivalence Principle (SEP, WEP), the Parametrized Post Newtonian (PPN) parameter β, the time change of the Gravitational constant (G), 1/r2 deviations and new gravitational theories beyond General Relativity (GR), like the unified braneworld theory (G. Dvali et al., 2003). Keywords: Lunar Laser Ranging, general relativity, gravitation, equivalence principle, geodetic precession, gravitational constant variation, PPN parameters, APOLLO station, International Lunar Network, Cube Corner Retroreflector.
- keywords: accuracy; acta; apollo; array; ccr; corner; currie; earth; ffdp; figure; frascati; generation; housing; infn; kind; laser; llr; lnf; lunar; lunar laser; maryland; measurements; moon; moonlight; nasa; new; optical; polytechnica; report; retroreflector; scf; science; shade; space; station; sun; temperature; test; thermal; time; university; way
- versions: original; plain text
- ap-2004
- author: Weidenhaupt, Klaus
- title: THE AUGER ENGINEERING RADIO ARRAY
- date: 2013-12-18
- words: 2592
- flesch: 56
- summary: Radio detector stations and calibration The hardware design of the autonomous radio-detector stations (RDSs) evolves from various prototype setups at the Pierre Auger Observatory. The Auger Engineering Radio Array currently measures MHz radio emission from extensive air showers induced by high energy cosmic rays with 24 self-triggered radio detector stations.
- keywords: aera; air; array; auger; calibration; collaboration; cosmic; data; detection; detector; different; direction; electric; emission; energy; events; field; fig; geomagnetic; induced; lopes; measured; measurements; mhz; noise; observatory; pierre; pierre auger; polarization; primary; pulse; radio; radio emission; rays; reconstructed; self; showers; site; sources; stations
- versions: original; plain text
- ap-2007
- author: Federici, Memmo; Martino, Bruno L.
- title: A COMPUTER CLUSTER SYSTEM FOR PSEUDO-PARALLEL EXECUTION OF GEANT4 SERIAL APPLICATION
- date: 2013-12-18
- words: 1884
- flesch: 48
- summary: • Intensive reuse of serial simulation software. Simulation of the interactions between particles and matter in studies for developing X-rays detectors generally requires very long calculation times (up to several days or weeks).
- keywords: acta; applications; cluster; computer; computing; cores; data; days; design; environment; execution; factor; figure; file; geant4; graphical; interfaces; large; login; nodes; parallel; parameters; polytechnica; pseudo; run; serial; simulation; single; software; speed; system; time; user
- versions: original; plain text
- ap-2008
- author: Bressler, Smadar; Shaviv, Giora; Shaviv, Nir J.
- title: THE SENSITIVITY OF THE GREENHOUSE EFFECT TO CHANGES IN THE CONCENTRATION OF GASES IN PLANETARY ATMOSPHERES
- date: 2013-12-18
- words: 4945
- flesch: 64
- summary: Keywords: greenhouse effect, radiative transfer, earth like planets, surface temperature. The arrow marks the location of the Earth according to the Earth mean column density of water vapor as given by Crisp [2]. surface temperature.
- keywords: absorption; albedo; atmosphere; central; changes; concentration; depth; earth; effect; emission; energy; figure; flux; function; greenhouse; greenhouse effect; i∗,fir; like; limit; line; mean; model; molecular; optical; paradox; planet; planetary; problem; radiation; radiative; radiative transfer; range; saturation; shaviv; simpson; smadar; solution; specific; star; surface; surface temperature; temperature; transfer; tsurf; vapor; water; wavelength; windows; λrad; τfir; τvis
- versions: original; plain text
- ap-2010
- author: Antink, Christoph Hoog; Leonhardt, Steffen
- title: QUANTIFICATION OF RESPIRATORY SINUS ARRHYTHMIA WITH HIGH-FRAMERATE ELECTRICAL IMPEDANCE TOMOGRAPHY
- date: 2013-12-31
- words: 4168
- flesch: 66
- summary: One can observe that high frame rate EIT is capable of analyzing cardiac function with great precision. Respiratory rate according to protocol (RR), standard deviation of global impedance peaks (std(∆GI)) as well as the correlation coefficient (r(∆GI, ∆BBI)) of the change in GI and the change in BBI and the corresponding p-Value.
- keywords: acta; activity; analysis; bbi; bpm; calculated; cardiac; cardio; change; correlation; coupling; course; crs; data; delay; device; distribution; ecg; eit; electrical; electrode; error; figure; framerate; frequency; global; heart; high; impedance; known; mae; maximum; mean; measurements; medical; peak; pixel; polytechnica; rate; respiratory; rmse; rsa; run; seconds; signal; single; table; time; tomography; variability
- versions: original; plain text
- ap-2012
- author: Lavička, Hynek; Novotný, Jan
- title: EMPLOYMENT, PRODUCTION AND CONSUMPTION WITH RANDOM UPDATE: NON-EQUILIBRIUM STATIONARY STATE EQUATIONS
- date: 2013-12-31
- words: 4353
- flesch: 59
- summary: Introduction In recent years, the emergence of cheap computational power and progress in big data science has resulted in the appearance of multi-agent computational models in the economic and social sciences, see [4]. By contrasts, multi-agent computational models have to be perceived as complex systems, see [5–7], and this requires a specific set of tools.
- keywords: acta; activity; agent; approximation; citizens; companies; company; complex; computational; consumption; demand; discussion; dw′; economic; economy; employer; employment; equations; equilibrium; field; goods; hiring; interactions; linear; mean; micro; model; multi; non; number; p(c; p(e; paper; particular; phη; polytechnica; production; properties; random; respect; revenue; set; society; solution; state; stationary; step; system; time; turn; unemployed; university; variables; wage; wright
- versions: original; plain text
- ap-2014
- author: Böhm, Anna; Brüser, Christoph; Leonhardt, Steffen Leonhardt
- title: A NOVEL BCG SENSOR-ARRAY FOR UNOBTRUSIVE CARDIAC MONITORING
- date: 2013-12-31
- words: 3425
- flesch: 64
- summary: Raw BCG signal. However, optical sensors are prone to movement artifacts, as are other BCG sensors.
- keywords: algorithm; analog; array; artifacts; bcg; beat; bed; best; body; breath; brüser; cardiac; channel; detector; different; ecg; engineering; estimation; fig; figure; filter; heart; ieee; intervals; light; mattress; measurement; monitoring; multiple; optical; pass; positions; principle; prone; rate; results; sensor; setup; signal; subject; system; time; unobtrusive; vol
- versions: original; plain text
- ap-2015
- author: Frougny, Christiane; Klouda, Karel
- title: FACTOR AND PALINDROMIC COMPLEXITY OF THUE-MORSE’S AVATARS
- date: 2013-12-31
- words: 2587
- flesch: 84
- summary: Keywords: factor complexity, palindromic complexity, univoque numbers, Thue-Morse word. Factor complexity The following lemma points out the similarity between the languages of the words uTM and wa.
- keywords: a(1; complexity; factor; infinite; lemma; length; letters; math; morse; number; palindromic; putm; sequence; set; thue; unique; univoque; utm; word; εn+1
- versions: original; plain text
- ap-2017
- author: Jiroutová, Dita; Vokáč, Miroslav
- title: ANALYSIS OF THE ACCURACY OF FIBRE-OPTIC STRAIN GAUGES
- date: 2013-12-31
- words: 2534
- flesch: 59
- summary: The most widely used deformation sensors include resistance strain gauges, capacity and induc- tion displacement sensors, and video strain gauges. The spreads of the calibration constants show that it is necessary to calibrate SOFO strain gauges, and to determine their calibration constant, before they are used.
- keywords: accuracy; active; calibration; constants; experimental; fibre; figure; gauges; initial; initial stress; length; measurement; measuring; monitoring; optic; optic strain; prague; sensors; sofo; sofo fibre; strain; strain gauges; stress; stress length; structure; system; value
- versions: original; plain text
- ap-2018
- author: Mikeš, Jan; Kreibich, Ondrej; Neužil, Jan
- title: A LIGHTNING CONDUCTOR MONITORING SYSTEM BASED ON A WIRELESS SENSOR NETWORK
- date: 2013-12-31
- words: 3034
- flesch: 62
- summary: This paper presents ways to carry out wireless monitoring of lightning strikes on buildings and to deal with their impact on lightning conductors. Monitored building The proposed solution was developed by implement- ing a wireless sensor into a device used commercially for making a statistical record of lightning strikes on lightning conductors.
- keywords: acta; battery; buildings; catchment; conductor; counter; current; czech; data; direct; discharge; electrical; equipment; event; figure; fire; gateway; information; inspections; iris; jan; lightning; lightning strikes; mechanical; module; monitoring; network; node; online; polytechnica; power; prague; protection; republic; sensor; solution; standard; strikes; system; table; technology; usd; wireless; wsn; year; čsn
- versions: original; plain text
- ap-202
- author: Vognar, M.; Fišer, M.; Šimáně, Č.; Chvátil, D.
- title: Filling and Recycling Apparatus of a Cyclotron Target with Enriched Krypton for Production of Radiopharmaceuticals
- date: 2001-01-02
- words: 3222
- flesch: 62
- summary: The design and construction makes use of previous experience in the construction and operation of two analogue apparatuses for Xe124 high pressure gas targets, but major modifications have been incorporated, evoked by the different physical properties of Kr, by the character of the nuclear reaction, and by the demand for automation from the side of the end user. Keywords: generator, Kr gas target, 36K 82(p, 2n)
- keywords: apparatus; closed; cm3; container; dewar; fig; filling; flask; gas; gauge; heating; high; irradiation; liquid; main; minutes; mpa; nitrogen; power; pressure; production; pump; pumping; reaction; recycling; system; target; temperature; tube; tubing; turbomolecular; vacuum; valve; volume; working
- versions: original; plain text
- ap-2021
- author: Neusser, Zdenek; Valášek, Michael
- title: CONTROL OF THE DOUBLE INVERTED PENDULUM ON A CART USING THE NATURAL MOTION
- date: 2013-12-31
- words: 4161
- flesch: 60
- summary: Second, the system is stabilized and controlled exactly into the equilibrium at the upper position by NQR control. The input variable u is therefore plotted in the same figure, based on the acceleration of the cart (4) when using NQR control and based on the NQR algorithm in the vicinity of the unstable equilibrium.
- keywords: acceleration; approach; cart; control; coordinates; cos; damping; double; dynamics; eigenfrequencies; energy; equations; equilibrium; figure; final; input; inverted; left; mechanical; mechanism; motion; natural; nonlinear; nqr; pendulum; position; right; second; sin; swing; system; time; underactuated; upper; valášek
- versions: original; plain text
- ap-2022
- author: Patel, Rachana U.; Deheri, G. M.
- title: EFFECT OF SLIP VELOCITY ON THE PERFORMANCE OF A SHORT BEARING LUBRICATED WITH A MAGNETIC FLUID
- date: 2013-12-31
- words: 2854
- flesch: 65
- summary: Keywords: short bearing, magnetic fluid, slip velocity, load carrying capacity. Results and Discussion Equations (6) and (8), respectively, present the varia- tion of non-dimensional pressure distribution and load carrying capacity, while the frictional force is deter- mined from Equation (9).
- keywords: aspect; bearing; bhat; capacity; deheri; dimensional; effect; field; figure; fluid; friction; hydrodynamic; load; lubricant; lubrication; magnetic; non; patel; performance; porous; pressure; ratio; respect; short; slider; slip; values; variation; velocity
- versions: original; plain text
- ap-2024
- author: Pomprapa, Anake; Misgeld, Berno; Sorgato, Verónica; Stollenwerk, André; Walter, Marian; Leonhardt, Steffen
- title: ROBUST CONTROL OF END-TIDAL CO₂ USING THE H∞ LOOP-SHAPING APPROACH
- date: 2013-12-31
- words: 4274
- flesch: 57
- summary: [s] e tC O 2 [ m m H g ] H loop-shaping controller for Hammerstein model ∞ -10-20 Figure 6. Nonlinear Hammerstein model Providing a representation of signal flow using a block- oriented structure, the Hammerstein model comprises a static nonlinearity N
- keywords: acta; affine; algorithm; approach; block; closed; control; controller; data; design; end; etco2; evaluation; figure; hammerstein; human; identification; input; linear; loop; lung; mechanical; mmhg; model; nonlinear; nonlinearity; order; output; paco2; parameters; patients; performance; plant; polytechnica; pressure; range; respiratory; response; results; robust; shaping; simulation; singular; state; static; steady; structure; subject; system; tidal; time; uncertainty; value; ventilation; volunteer; y(k; y(ko
- versions: original; plain text
- ap-2028
- author: Vlček, Petr; Skočilas, Jan; Jirout, Tomáš
- title: CFD SIMULATION OF A STIRRED DISHED BOTTOM VESSEL
- date: 2013-12-31
- words: 3309
- flesch: 60
- summary: The objectives of the paper are to determine complex dimensionless characteristics — power number and impeller flow rate number — by carrying out investigations of the velocity field within the stirred vessel using a simulation of the equipment. This study deals with simulation of the flow in stirred vessels.
- keywords: accuracy; characteristics; comparison; contours; curved; cut; data; deviation; discretization; equipment; experimental; figure; flow; geometry; impeller; impeller flow; magnitude; model; number; order; order accuracy; power; rate; results; rsm; second; second order; simulation; speed; stirred; system; table; turbulence; unbaffled; unbaffled vessel; velocity; vessel
- versions: original; plain text
- ap-2030
- author: Wirth, Ulrich; Shirali, Nuri; Křístek, Vladimír; Kurth, Helmut
- title: HYBRID SHEARWALL SYSTEM — SHEAR STRENGTH AT THE INTERFACE CONNECTION
- date: 2013-12-31
- words: 4619
- flesch: 55
- summary: The hybrid shear-wall system consists of typical reinforced concrete shear walls with composite edge members or flanges. In addi- tion, the failure of reinforced concrete shear walls has been found to be caused by local failure of the edge- member columns (flanges).
- keywords: acta; alternating; anchor; anchor bars; anchorage; arrangement; bars; behavior; column; composite; concrete; connection; construction; cyclic; design; different; displacement; edge; end; figure; horizontal; hybrid; interface; layout; load; long; member; model; panel; polytechnica; possible; reinforcement; resistance; response; results; scale; shear; shearwall; slip; specimen; steel; stirrups; straight; structural; study; system; test; test specimen; tube; typical; view; vol; wall
- versions: original; plain text
- ap-2035
- author: Pěnička, Michal; Hoffman, Pavel; Fořt, Ivan
- title: STIRRED FLUIDIZED-BED DRYER OF REGENERATED ION EXCHANGER PARTICLES
- date: 2014-06-27
- words: 5181
- flesch: 67
- summary: This paper describes the intensification of the fluidized-bed drying process for regenerated spherical-shape ion exchanger particles in batch mode, achieved by a mechanical stirrer in the fluidized bed layer of dried particles. The drying rate for the first period of fluidized-bed drying is determined according to formula (10), where mS represents dry material mass and As12 is the total area of dried particles determined using formulas (11), (12), (13) and (9) for the studied periods.
- keywords: air; bed; bed layer; chamber; czech; density; determined; diameter; dryer; drying; effect; equation; exchanger; fig; fluidization; fluidized; fluidized bed; humidity; initial; ion; layer; layer period; mass; material; mean; moisture; m−2; number; particle diameter; particles; period; point; porosity; porous; process; rate; regenerated; state; stirrer; surface; s−1; temperature; time; total; uab; value; velocity; volume; water; wet
- versions: original; plain text
- ap-2038
- author: Beniak, Juraj; Križan, Peter; Matúš, Miloš; Kováčová, Monika
- title: THE OPERATING LOAD OF A DISINTEGRATION MACHINE
- date: 2014-02-28
- words: 2238
- flesch: 61
- summary: The significance of the monitored parameters that influence the torque moment needed to disintegrate material samples has been investigated. Figures 3 and 4 show the relation of the measured values of torque Mk to the surface area of the sam- ple material Sm.
- keywords: acta; area; cross; disintegrative; estimation; fig; material; matrix; measured; parameter; polytechnica; relation; sample; section; surface; surface area; thickness; torque; uncertainty; values; wedge; width
- versions: original; plain text
- ap-204
- author: Elminir, Hamdy K.; Benda, V.; Kudláček, I.
- title: Actual Optical and Thermal Performance of Photovoltaic Modules
- date: 2001-01-02
- words: 8805
- flesch: 59
- summary: In general this can be expressed as [11]: � �� �Q F T Trad s m i, j, k� � �� � � 4 4 . cos cos cos cos sin sin� � � � � ��Z � � (3) The geometric factor Rb, the ratio of beam radiation on the tilted surface, Ib, T to that on a horizontal surface at any time, can be calculated exactly by appropriate use of Equation 1.
- keywords: acta; adobe; angle; beam; cell; circuit; circumsolar; collector; components; conditions; constant �; cos cos; current; d �; data; day; diffuse; diffuse radiation; direction; distribution; effect; ei �; energy; equation; factor; false; fig; ground; hay; heat; horizontal; hourly; incidence; incident; inclined; increase; index; inside; interface; irradiance; isotropic; klucher; layer; matrix; meshes; model; module; oi �; optical; parameters; performance; photovoltaic; plane; polytechnica; radiation; radiation incident; reflection; results; short; silicon; sin; sky; solar; solar radiation; south; sun; surface; t h; t k; t t; temperature; thermal; tilted; total; transfer; transmission; true; z �; � cos; � g
- versions: original; plain text
- ap-2044
- author: Horvat, Frantisek; Cekan, Michal; Soltes, Lukas; Biath, Peter; Hucko, Branislav; Jedinak, Igor
- title: CURRENT WAYS TO HARVEST ENERGY USING A COMPUTER MOUSE
- date: 2014-02-28
- words: 1584
- flesch: 55
- summary: Possible energy harvesting systems, PVF2 – piezomaterial, LT – circuit required for EH, C – ca- pacitor, B – battery, S – input to mouse system. Studies have already been made for the potential application of EH circuits based on a piezomaterial, and have shown the possibility of applying it for battery management of cardiostimulators [2].
- keywords: activities; average; battery; beam; body; button; circuit; clicks; computer; energy; figure; frequency; gaming; harvesting; hour; interactions; mouse; piezomaterial; pvf2; results; system; tip; work
- versions: original; plain text
- ap-2045
- author: Hrnčířová, Michaela; Špiláček, Michal; Pospíšil, Jiří
- title: SIZE ANALYSIS OF SOLID PARTICLES AT THE EXPERIMENTAL DEVICE FOR MULTI-STAGE BIOMASS COMBUSTION
- date: 2014-02-28
- words: 1948
- flesch: 66
- summary: The device utilizes laser diffraction for particle size analysis. The laser analyser shows the results on data sheets, where the frequency of the corresponding range of particle sizes to the whole sample is displayed.
- keywords: acta; analysis; ash; beam; biomass; chamber; combustion; cyclone; device; diffraction; distribution; figure; frequency; gasifying; heater; laser; method; particles; pipe; polytechnica; results; sample; separator; size; solid; table; water
- versions: original; plain text
- ap-2046
- author: Kováčová, Monika; Matúš, Miloš; Križan, Peter; Beniak, Juraj
- title: DESIGN THEORY FOR THE PRESSING CHAMBER IN THE SOLID BIOFUEL PRODUCTION PROCESS
- date: 2014-02-28
- words: 3598
- flesch: 68
- summary: Forces in cylindrical pressing chamber. 68-76 [6] KRIŽAN, P. – ŠOOŠ, Ľ. – MATÚŠ, M.: Optimisation of briquetting machine pressing chamber geometry.
- keywords: 4µλ; briquettes; case; chamber; cone; conical; cos; cylinder; cylindrical; d22; figure; force; geometry; influence; material; mathematical; outgoing; pa(x; pap; parameters; pressing; pressure; process; quality; structural
- versions: original; plain text
- ap-2051
- author: Lisý, Martin; Baláš, Marek; Špiláček, Michal; Skála, Zdenek
- title: TECHNICAL AND ECONOMIC OPTIMIZATION OF COGENERATION TECHNOLOGY USING COMBUSTION AND GASIFICATION
- date: 2014-02-28
- words: 4988
- flesch: 64
- summary: 88–95 51 http://www.tzb-info.cz/2834-orc-technologie-v-realizaci-ii-trhove-sviny-srovnani http://www.tzb-info.cz/2834-orc-technologie-v-realizaci-ii-trhove-sviny-srovnani Acta Polytechnica 54(1):42–51, 2014 1 Introduction — microcogeneration 2 Design and balance calculations for a microcogeneration unit 2.1 Partial evaluation of basic solutions 2.2 Specification and extension of the designed solutions 2.3 Overall evaluation and a comparison of the solutions 3 Economic comparison of the proposed solutions 4 Overall evaluation and a comparison between the options 5 Conclusions Acknowledgements References A decrease in flue gas temperature was achieved via higher amounts of excess air during the combustion process; however, this requires bigger dimensions of the exchanger.
- keywords: acta; air; baláš; basic; biomass; boiler; calculations; cogeneration; combustion; comparison; costs; dependence; design; economic; efficiency; electrical; energy; exchanger; exhauster; figure; flow; flue; flue gas; fuel; gas; gasification; heat; higher; investment; microcogeneration; optimization; overall; payback; period; polytechnica; pressure; price; results; solutions; table; technical; technology; temperature; turbine; turbo; unit
- versions: original; plain text
- ap-2055
- author: Onderová, Iveta; Kolláth, Ludovít; Ploskuňáková, Lucia
- title: EXPERIMENTAL VERIFICATION OF THE STRUCTURAL AND TECHNOLOGICAL PARAMETERS OF THE PKS
- date: 2014-02-28
- words: 2215
- flesch: 47
- summary: Unidirectional position repeatability is calculated as follows: RP = l̄ + 3Sl, where l̄ = 1 n n∑ j=1 lj , lj = √ (xj − x̄)2 + (yj − ȳ)2 The parameters of accuracy and position repeata- 60 vol.
- keywords: accuracy; calculated; carrier; central; coordinates; cylinder; figure; j=1; joint; kinematic; location; measurement; mechanical; motion; orientation; parallel; parameters; platform; position; positioning; positioning accuracy; programmed; repeatability; rods; structure; telescopic; tools; tricept; unidirectional; unidirectional positioning
- versions: original; plain text
- ap-2057
- author: Onderová, Iveta; Šooš, Lubomír
- title: ANALYSIS OF PARAMETERS AFFECTING THE QUALITY OF A CUTTING MACHINE
- date: 2014-02-28
- words: 1958
- flesch: 46
- summary: Keywords: cutting machines, quality, positioning accuracy, repeatable positioning accuracy. Investigations of accuracy and repeatable positioning accuracy were essential for the research presented in this paper.
- keywords: accuracy; analysis; axis; cutting; cutting machine; design; error; evaluation; experiment; figure; linear; machine; measured; measurements; measuring; parameters; portal; positioning; positioning accuracy; positions; quality; requirements; table; technology; value; working; y axis
- versions: original; plain text
- ap-2059
- author: Štefanica, Jiří; Hrdlička, Jan
- title: NOx PREDICTION FOR FBC BOILERS USING EMPIRICAL MODELS
- date: 2014-02-28
- words: 3174
- flesch: 56
- summary: Authors of NOX prediction models for FBC usually combine a kinetic modelling approach with FBC hydrodynamic models. Recently used kinetic prediction models for FBC boilers are overly complex and require large computing capacity.
- keywords: air; approach; bed; biomass; boilers; boleslav; chpp; coal; combustion; concentration; conditions; constant; content; control; data; emissions; empirical; engineering; fbc; figure; formation; fuel; hard; ibler; input; lignite; low; method; mladá; model; modified; nitrogen; nox; parameters; pcc; pohl; ppm; prediction; reliability; results; steam; table; temperature
- versions: original; plain text
- ap-206
- author: Hošková, Š.; Kapičková, O.; Trtík, K.; Vodák, F.
- title: Effect of Thermal Cycling on the Strength and Texture of Concrete for Nuclear Safety Structures
- date: 2001-01-02
- words: 2027
- flesch: 55
- summary: These are the only similar factors: TEMELÍN concrete belongs to class B 40, while PENLY concrete is prepared as so-called high-resist- ance concrete (the uniaxial compression strength is higher than 60 MPa) The texture of concrete is not constant in time.
- keywords: adobe; cement; climatic; composition; compressive; concrete; cycles; cycling; czech; dependence; false; fig; number; paste; pdf; penly; pores; process; republic; results; samples; specific; strength; structure; table; temelín; texture; thermal; total; true; volume; water
- versions: original; plain text
- ap-2064
- author: Ramírez, José Luis; Rubiano, Gustavo Nevardo
- title: BIPERIODIC FIBONACCI WORD AND ITS FRACTAL CURVE
- date: 2015-02-28
- words: 5694
- flesch: 87
- summary: Keywords: Fibonacci word, biperiodic Fibonacci word, biperiodic Fibonacci curve. [3] Berstel, J., Fibonacci words-a survey, in: G. Rosenberg, A. Salomaa (Eds.), The Book of L, Springer, Berlin, 1986, 11–26.
- keywords: a(10; b)(0; b)n; biperiodic; biperiodic fibonacci; clear; curve; definition; drawing; f(a; fa(a; fibonacci; fibonacci word; fractal; infinite; integer; length; lim; nth; number; n−1; n−2; n−3)f(a; odd; prefix; proof; properties; proposition; ramírez; rubiano; rule; sequence; similar; sturmian; symbols; table; theorem; word; σ(a; φ(f(a
- versions: original; plain text
- ap-2067
- author: Kratky, Lukas; Jirout, Tomáš
- title: IMPROVING SPECIFIC POWER CONSUMPTION FOR MECHANICAL MIXING OF THE FEEDSTOCK IN A BIOGAS FERMENTER BY MECHANICAL DISINTEGRATION OF LIGNOCELLULOSE BIOMASS
- date: 2014-10-31
- words: 4389
- flesch: 59
- summary: Keywords: fermenter, lignocellulose biomass, mixing, specific power consumption, wheat straw. Dependence of power consumption on impeller speed.
- keywords: batch; biogas; biomass; consumption; diameter; disintegration; experiments; fermenter; fig; flow; fluid; height; homogeneity; hydrated; hydration; impeller; lignocellulose; liquid; mechanical; milled; mixing; number; particles; power; power consumption; properties; regime; rotational; specific; specific power; speed; straw; sufficient; surface; suspension; system; torque; untreated; untreated straw; value; vessel; water; wheat; wheat straw
- versions: original; plain text
- ap-2070
- author: Loufek, Jan; Královcová, Jiřina
- title: SIMULATION OF RADIATIVE HEAT FLUX DISTRIBUTION UNDER AN INFRARED HEAT EMITTER
- date: 2015-02-28
- words: 4006
- flesch: 54
- summary: Keywords: radiative heat transfer; simulations; optimization; heat flux distribution. This tool is helpful in providing heat flux distribution functions under various configurations (heater reflector shape, heated surface shape and inclination, distance) and under various input parameters (temperature, emissivity).
- keywords: algorithm; body; bounding; calibration; case; characteristics; design; distribution; emissivity; emitter; energy; factor; figure; flux; flux distribution; heat; heat flux; heat transfer; heated; heated surface; heaters; implemented; infrared; input; line; measured; model; optimization; particular; radiation; radiative; radiative heat; real; reflector; results; set; shape; shell; simulated; simulation; surface; system; table; temperature; transfer; values; view
- versions: original; plain text
- ap-2073
- author: Bagchi, Bijan; Modak, Subhrajit; Panigrahi, Prasanta K.
- title: TRACKING DOWN LOCALIZED MODES IN PT-SYMMETRIC HAMILTONIANS UNDER THE INFLUENCE OF A COMPETING NONLINEARITY
- date: 2014-04-30
- words: 3650
- flesch: 67
- summary: Class II solutions On the other hand, if we choose the extended Rosen- Morse potential to have the form V (x) = −a(a The figure at the right corresponds to the evaluation of Class II solution under the same parametrizations.
- keywords: christodoulides; class; complex; corresponding; distribution; doi; eigenmode; eigenvalues; equation; figure; imaginary; index; lett; modes; nonlinear; nonlinearity; optical; parameters; phys; potential; propagation; real; rev; solutions; spectrum; symmetric; term; time; unstable; −0.1; −0.2
- versions: original; plain text
- ap-2074
- author: Bishop, Raymond F.; Znojil, Miloslav
- title: THE COUPLED-CLUSTER APPROACH TO QUANTUM MANY-BODY PROBLEM IN A THREE-HILBERT-SPACE REINTERPRETATION
- date: 2014-04-30
- words: 6606
- flesch: 56
- summary: Sub- sequently, in section 3 an overall review of the key ideas of CCM constructions will be recalled, and their reinterpretation within the general THS scheme will be described. 2.2.1 Crypto-Hermitian IBM method 2.2.2 PT-symmetric models 2.2.3 Towards the complex energy spectra. 3 THS interpretation of CCM constructions 3.1 Brief introduction to CCM constructions 3.2 CCM–THS correspondence 4 Discussion 4.1 A CCM–THS fusion? 4.2 Towards the infinite-dimensional Hilbert spaces 4.3 Outlook Acknowledgements References
- keywords: abstract; acta; adjoint; alternative; approach; approximation; arponen; bishop; body; c+; case; ccm; cluster; complex; complicated; construction; conventions; creation; different; doi; effective; energy; exp; extended; form; formalism; framework; functions; general; ground; h(f; h(p; h(s; hamiltonian; hermitian; hermiticity; hilbert; hilbert space; ibm; initial; introduction; key; known; mappings; mechanics; method; microscopic; model; multi; non; notation; operator; paper; phase; phys; physical; physics; polytechnica; practical; present; problem; quantum; question; representation; respective; review; schrödinger; self; set; simplification; space; state; systems; table; theory; ths; time; unitary; use; variational; wave; znojil
- versions: original; plain text
- ap-2076
- author: Borisov, Denis
- title: EIGENVALUE COLLISION FOR PT-SYMMETRIC WAVEGUIDE
- date: 2014-04-30
- words: 4584
- flesch: 81
- summary: Assume that the equation (Hα −λ0)φ0 = ψ0 (1.8) is solvable and there exists a solution satisfying (φ0,T ψ0)L2(Ω) 6= 0, (φ0,ψ0)L2(Ω) = 0. These eigenvalues are holomorphic w.r.t. ε and the first terms of their Taylor series are λ±ε = λ0 + ελ ± 1 + O(ε 2), λ±1
- keywords: borisov; collision; complex; doi; dx1; eigenvalues; equation; follows; functions; hermitian; holomorphic; identity; l2(ω; lemma; main; multiplicity; non; o(ε; operator; phenomenon; physics; polytechnica; proof; real; results; simple; small; solvable; symmetric; theorem; w.r.t; α(x1; ψ0)l2(ω; ∂x2
- versions: original; plain text
- ap-2077
- author: Esina, Anna I.; Shafarevich, Andrei I.
- title: SEMICLASSICAL ASYMPTOTICS OF EIGENVALUES FOR NON-SELFADJOINT OPERATORS AND QUANTIZATION CONDITIONS ON RIEMANN SURFACES
- date: 2014-04-30
- words: 3476
- flesch: 61
- summary: doi: 10.4213/im399 [16] A. V. D’yachenko, A. A. Shkalikov. [19] V. I. Pokotilo, A. A. Shkalikov.
- keywords: a. a.; adjoint; asymptotics; behavior; case; complex; conditions; corresponding; cycles; different; dimensional; doi; eigenvalues; equation; form; graph; induction; integer; magnetic; maslov; math; mechanics; nonself; operator; points; potential; problem; quantization; remark; riemann; schrödinger; semiclassical; shafarevich; sommerfeld; spectral; spectrum; sphere; surface; theory; torus
- versions: original; plain text
- ap-2078
- author: Eleuch, Hichem; Rotter, Ingrid
- title: EXCEPTIONAL POINTS IN OPEN AND PT-SYMMETRIC SYSTEMS
- date: 2014-04-30
- words: 5878
- flesch: 66
- summary: Exceptional points (EPs) determine the dynamics of open quantum systems and cause also PT symmetry breaking in PT symmetric systems. Recent studies have shown the important role the singular points in the continuum play for the dynam- ics of open quantum systems, see, e.g., the review [10].
- keywords: 4|w|2; breaking; case; complex; coupling; crossing; discrete; eigenfunctions; eigenvalues; energy; environment; eps; equation; exceptional; h(2; hamiltonian; hermitian; imaginary; level; matrix; means; neighborhood; non; open; open quantum; optical; parameter; phase; phys; physics; points; pt symmetric; quantum; quantum systems; real; results; rotter; states; symmetric; symmetry; system; wavefunctions; widths
- versions: original; plain text
- ap-208
- author: Kalousková, M.; Novotná, E.; Šejnoha, J.
- title: Reliability - Based Designof Precast Buildings
- date: 2001-01-02
- words: 3569
- flesch: 59
- summary: An expression for the failure probability can be found in [6] in this form � �� � � � � �P g Expanding the function g into the Taylor series up to the second order terms and introducing certain orthogonal transformations, the failure surface can be written as: � �� �g U Un
- keywords: acta; adobe; analysis; b b; b c; beam; c c; code; czech; elements; failure; false; fig; house; http://ctn.cvut.cz/ap/; index; inner; joints; loading; methods; model; numerical; panels; polytechnica; precast; properties; publishing; random; regions; reliability; second; stiffness; structure; subgrade; technical; temperature; true; truss; university; vertical; vol; � �
- versions: original; plain text
- ap-2081
- author: Fernández, Francisco M.
- title: ON THE REAL MATRIX REPRESENTATION OF PT-SYMMETRIC OPERATORS
- date: 2014-04-30
- words: 2262
- flesch: 65
- summary: Âan|n〉 = an|n〉 + a∗nÂ|n〉 (17) which already satisfies Â|nA〉 = |nA〉. We can construct the basis set {|n,σ〉} from any orthonormal basis set {|n〉} in the following way |n,σ〉 = Nn,σQ̂σ|n〉, Q̂σ = 1 2 ( 1 + σ ) (16) where Nn,σ is a suitable normalization factor.
- keywords: antiunitary; basis; bender; case; complex; equation; general; hamiltonians; harmonic; hermitian; matrix; non; operator; oscillator; porter; real; representation; satisfies; section; set; symmetry; |na
- versions: original; plain text
- ap-2083
- author: Haag, Daniel; Cartarius, Holger; Wunner, Günter
- title: A BOSE-EINSTEIN CONDENSATE WITH PT-SYMMETRIC DOUBLE-DELTA FUNCTION LOSS AND GAIN IN A HARMONIC TRAP: A TEST OF RIGOROUS ESTIMATES
- date: 2014-04-30
- words: 4248
- flesch: 63
- summary: A paper in which PT -symmetric point interactions were studied embedded in an external potential is 116 http://dx.doi.org/10.14311/AP.2014.54.0116 http://ojs.cvut.cz/ojs/index.php/ap vol. Bound states of n-dimensional harmonic oscillator decorated with dirac delta functions.
- keywords: -symmetric; bose; branch; case; complex; condensate; delta; delta functions; different; doi; double; eigenvalues; einstein; estimates; excited; figure; functions; harmonic; hermiticity; imaginary; levels; loss; mityagin; nonlinearity; oscillator; parts; perturbation; phys; point; potential; real; shifts; shrink; siegl; spectrum; state; strength; unperturbed; wave
- versions: original; plain text
- ap-2085
- author: Jones, H. F.
- title: THE FLOQUET METHOD FOR PT-SYMMETRIC PERIODIC POTENTIALS
- date: 2014-04-30
- words: 1426
- flesch: 76
- summary: This phenomenon is particularly interesting for the case of periodic PT -symmetric potentials, where unusual band structures may occur [7, 8]. By the general theory of PT -symmetric quantum systems, their energy levels are either real or occur in complex-conjugate pairs, which implies that the secular equation must be real.
- keywords: doi; equation; floquet; lett; periodic; phys; potentials; real; rev; solutions; u1(x; u1(π; u2(x; u′2(π
- versions: original; plain text
- ap-2086
- author: Kibler, Maurice R.
- title: ON TWO WAYS TO LOOK FOR MUTUALLY UNBIASED BASES
- date: 2014-04-30
- words: 2229
- flesch: 74
- summary: Concluding remarks The equivalence discussed in this work of the two ways of looking at MUBs amounts in some sense to the equivalence between the search for equiangular lines in Cd and for equiangular vectors in Cd 2 (cf. Equiangular lines in Cd correspond to |〈aα|bβ〉| = 1 √ d for a 6= b (26) while equiangular vectors in Cd 2 correspond to w(aα) · w(bβ) = 1 d for a 6= b (27) where the w(aα)·w(bβ) inner product in Cd 2 is defined as w(aα) · w(bβ) = d−1∑ p=0 d−1∑ q=0 wpq(aα)wpq(bβ) (28) Observe that the modulus disappears and the 1/ √ d factor is replaced by 1/d when passing from (26) to (27).
- keywords: bases; components; d(d; dimension; doi; d−1∑; equiangular; mubs; operator; q=0; quantum; satisfying; search; sic; unbiased; vectors; w(aα; wpq(aα; |aα; βδa
- versions: original; plain text
- ap-2088
- author: Leach, P. G. L.
- title: DIRAC AND HAMILTON
- date: 2014-04-30
- words: 1906
- flesch: 60
- summary: Dirac devised his theory of Quantum Mechanics and recognised that his operators resembled the canonical coordinates of Hamiltonian Mechanics. Now Hamiltonian Mechanics provided a lodestone to the new Quantum Mechanics. 2.
- keywords: classical; construct; coordinates; corresponding; dirac; equation; generalised; hamiltonian; harmonic; lagrangians; mechanics; motion; newtonian; noether; operators; oscillator; quantum; schrödinger; simple; symmetries; theory; university
- versions: original; plain text
- ap-2090
- author: Lee, M. Howard
- title: CAN ONE REALLY STUDY CHAOS ANALYTICALLY?
- date: 2014-04-30
- words: 2803
- flesch: 78
- summary: Conclusion: aleph cycle and chaotic trajectories Phys. 57, 617 (1985) doi: 10.1103/RevModPhys.57.617 132 http://dx.doi.org/10.1016/0370-1573(82)90057-6 http://dx.doi.org/10.1103/PhysRevLett.87.250601 http://dx.doi.org/10.1103/PhysRevLett.98.110403 http://dx.doi.org/10.1103/RevModPhys.57.617 Acta Polytechnica 54(2):130–132, 2014 1 Introduction 2 One-dimensional continuous map of real numbers in an interval 3 Logistic map 4 Solving the sextic equation: preliminaries 5 Solving the sextic equation: an internal degree of freedom 6 Conclusion: aleph cycle and chaotic trajectories Acknowledgements References
- keywords: acta; chaos; chaotic; cycle; domain; equation; finite; fixed; interval; logistic; map; numbers; phys; points; q(t; real; roots; set; sextic; sharkovskii; theorem
- versions: original; plain text
- ap-2092
- author: Löhle, Andreas; Cartarius, Holger; Haag, Daniel; Dast, Dennis; Main, Jörg; Wunner, Günter Wunner
- title: STABILITY OF BOSE-EINSTEIN CONDENSATES IN A PT-SYMMETRIC DOUBLE-δ POTENTIAL CLOSE TO BRANCH POINTS
- date: 2014-04-30
- words: 4661
- flesch: 67
- summary: The nonlinearity ∝ |ψ(x, t)|2 of the Gross-Pitaevskii equation introduces new interesting properties [8–17] such as PT broken states which appear for gain/loss contributions lower than those at which the corre- sponding PT symmetric states vanish. 133 http://dx.doi.org/10.14311/AP.2014.54.0133 http://ojs.cvut.cz/ojs/index.php/ap A. Löhle, H. Cartarius, D. Haag et al.
- keywords: bifurcation; bogoliubov; bose; change; complex; condensate; discrepancy; doi; double; eigenvalue; einstein; equation; et al; field; figure; function; gain; gennes; gross; ground; hermitian; lett; loss; mean; nonlinearity; norm; phys; pitaevskii; pitchfork; point; potential; pt symmetric; real; rev; stability; states; stationary; symmetric; system; values; wave
- versions: original; plain text
- ap-2095
- author: Mostafazadeh, Ali
- title: A DIFFERENTIAL INTEGRABILITY CONDITION FOR TWO-DIMENSIONAL HAMILTONIAN SYSTEMS
- date: 2014-04-30
- words: 1645
- flesch: 73
- summary: The study of integrable Hamiltonian systems has been a subject of active research since the nineteenth century. References [1] R. S. Kaushal and H. J. Korsch, “Some remarks on complex Hamiltonian systems,” Phys.
- keywords: condition; constant; equations; form; hamiltonian; integrability; integrable; system; theorem; ∂2h; ∂2u
- versions: original; plain text
- ap-2097
- author: Ohya, Satoshi
- title: A SIMPLE DERIVATION OF FINITE-TEMPERATURE CFT CORRELATORS FROM THE BTZ BLACK HOLE
- date: 2014-04-30
- words: 5466
- flesch: 67
- summary: −1/R2): AdS3 = { (X−1,X0,X1,X2) ∈ R2,2 ∣∣ − (X−1)2 − (X0)2 + (X1)2 + (X2)2 = −1 } . As is well-known, the AdS3 spacetime (6) has an alternative equivalent description as the SL(2,R) group manifold defined as follows: AdS3 = { X = ( X−1+X2 X1−X0 X1+X0 X−1−X2 )
- keywords: ads3; ads3 black; advanced; algebra; basis; black; black hole; boundary; btz; cft; cft2; conformal; coordinate; correlators; correspondence; cosh; doi; equations; field; finite; following; functions; generators; group; g∆(kl; hep; hole; identification; kr〉0; ladder; lie; momentum; noncompact; note; operators; paper; periodic; phys; point; recurrence; relations; retarded; scalar; simple; sinh; sl(2,r)l; so(1; so(2; space; spacetime; symmetry; temperature; theory; time; translation
- versions: original; plain text
- ap-2099
- author: Prešnajder, Peter; Gáliková, Veronika; Kováčik, Samuel
- title: LAPLACE-RUNGE-LENZ VECTOR IN QUANTUM MECHANICS IN NONCOMMUTATIVE SPACE
- date: 2014-04-30
- words: 5108
- flesch: 68
- summary: NC operators revisited Now we rewrite the Hamiltonian, the velocity operator and the NC LRL vector in terms of the new auxiliary operators which have been introduced. The Hilbert space of wave functions in NC space and the NC generalizations of important operators (Hamil- tonian, angular momentum, coordinate and velocity) are introduced.
- keywords: analog; angular; âα; case; casimir; commutator; components; considered; corresponding; coulomb; dynamical; energies; energy; equation; functions; group; hamiltonian; laplace; lrl; l̂i; mechanics; momentum; ncqm; noncommutative; operators; paper; potential; problem; quantum; relations; relevant; representations; schrödinger; so(3; so(4; space; standard; states; symmetry; terms; vector; velocity; wave; way; −2e
- versions: original; plain text
- ap-210
- author: Tesař, V.
- title: Two-equation Turbulence Model Similarity Solution of the Axisymmetric Fluid Jet
- date: 2001-01-02
- words: 10259
- flesch: 57
- summary: (13) as � � e w e w e e w e X f f f t t f t f t � � � � � � � � � � � � � � 1 1 2 2 2 2 2 2 1 2 2 2 1 � � � � � . (20): � � � � t t � � � � � � � � � � � � � � 2 2 2 2 1 2 2 2 1 22 j mX X j j j mX X .
- keywords: acta; analysis; anomaly; approach; assumption; ax �; axial; axis; axisymmetric; basic; boundary; c �; case; coefficient; conditions; constants; czech; data; deta*fn; diameter; dissipation; distance; distribution; earlier; effect; energy; eps; equation; equation model; evaluated; experimental; f �; fact; false; fig; flow; fluctuation; following; gradient; growth; hand; house; http://ctn.cvut.cz/ap/; integration; jet; jets; length; line; mean; model; nozzle; operator; ordinate; plane; polytechnica; possible; praha; prandtl; present; present solution; print; problem; profile; program; proper; publishing; radial; rate; relative; results; scale; sensitivity; similarity; solution; solved; spatial; spreading; standard; starting; technical; tesař; time; transformation; transformed; transport; transverse; true; turbulence; university; values; variables; velocity; viscosity; vol; � term
- versions: original; plain text
- ap-2101
- author: Turgut, Osman Teoman Turgut Teoman; Eröncel, Cem
- title: EXACT RENORMALIZATION GROUP FOR POINT INTERACTIONS
- date: 2014-04-30
- words: 8156
- flesch: 79
- summary: Then φ̃(Λ,ξ) becomes φ̃(Λ,ξ) = 2 π2 ( Λ2 + a2 )−1 ∫ Λ−dΛ 0 dτ′gΛ(Λ,τ′)τ′ sinh(πτ′)ϑ(Λ,τ′; ξ), (3.46) where we have again ignored the term proportional to dΛ. From this result we can find ϑ(τ, Λ; ξ) as ϑ(τ, Λ; ξ) = 2 π2 ( Λ2 + a2 )−1 ∫
- keywords: acta; case; constant; contraction; coupling; doi; ds s; effective; energy; equation; erg; exact; group; gλ(p; gλ(λ; gλ0; hamiltonian; hyperbolic; integral; interactions; limit; log; l′=0; n+1; physics; plane; point; polytechnica; problem; procedure; range; renormalization; result; s s2; scale; scale λ; sinh(πτ′; solution; space; state; sup; tanh(πs; term; theory; turgut; vol; wilson; λ λ0; λ0 ds; λ−dλ; ν2r2; ω0)y
- versions: original; plain text
- ap-212
- author: Böszörményi, G.; Böszörményi, L.
- title: Some Problems of the Integration of Heat Pump Technology into a System of Combined Heat and Electricity Production
- date: 2001-01-02
- words: 2867
- flesch: 53
- summary: If as planned, geothermal heat is fed directly into the district heating network the efficiency would be greatly reduced. In winter, only one housing estate in Košice city would be supplied with heat power (~65 MW) by the heat pump.
- keywords: adobe; alternative; chp; combined; conception; cycle; district; efficiency; electricity; energy; false; fig; gas; geothermal; geothermal energy; heat; heat pump; heating; košice; output; pdf; period; plant; power; processes; production; pump; pumping; secondary; solution; sources; stage; steam; system; technology; temperature; true; utilization; water; way
- versions: original; plain text
- ap-2122
- author: Dorner, Daniela; Biland, A.; Bretz, T.; Buss, J.; Einecke, S.; Eisenacher, D.; Hildebrand, D.; Knoetig, M. L.; Krähenbühl, T.; Lustermann, W.; Mannheim, K.; Meier, K.; Neise, D.; Overkemping, A.-K.; Paravac, A.; Pauss, F.; Rhode, W.; Ribordy, M.; Steinbring, T.; Temme, F.; Thaele, J.; Vogler, P.; Walter, R.; Weitzel, Q.; Zänglein, M.
- title: FACT — STATUS AND FIRST RESULTS
- date: 2014-06-27
- words: 2690
- flesch: 63
- summary: G-APDs [1] were therefore chosen as photosensors which has provided also the opportunity to show that Si-based photodetectors are suitable for Cherenkov telescopes. FACT is the first imaging Cherenkov telescope based on a camera using solid state photosensors (Geigermode Avalanche Photodiodes G-APD aka SiPM).
- keywords: 501; acta; analysis; apds; background; bright; camera; cherenkov; collaboration; conditions; data; events; excess; fact; figure; icrc; janeiro; left; light; monitoring; moon; mrk; observations; operation; physics; proceedings; rate; results; rio; stable; system; telescope; tev; time; trigger; zenith
- versions: original; plain text
- ap-2124
- author: Eikmann, Wiebke; Wilms, Jörn; Smith, Randall K.; Lee, Julia C.
- title: X-RAY TRANSMISSION AND REFLECTION THROUGH A COMPTON-THICK MEDIUM VIA MONTE-CARLO SIMULATIONS
- date: 2014-06-27
- words: 2197
- flesch: 63
- summary: The shape of the fluorescent lines also changes since scattered line photons form several Compton-shoulders which are very prominent especially for Compton-thick sources. The first term describes the number of line photons that was created within τ and the second term describes the subsequent absorption.
- keywords: absorption; cm−2; compton; energies; energy; figure; fluorescent; geometry; high; iron; kev; line; medium; model; photons; ray; red; scattering; shape; source; spectra; spectrum; spherical; strength; thick; wilms
- versions: original; plain text
- ap-2127
- author: Karas, Vladimír; Bakala, Pavel; Török, Gabriel; Dovčiak, Michal; Wildner, Martin; Wzientek, Dalibor; Šrámková, Eva; Abramowicz, Marek; Goluchová, Kateřina; Mazur, Grzegorz P.; Vincent, Frédéric H.
- title: DISTINGUISHING BETWEEN SPOT AND TORUS MODELS OF HIGH-FREQUENCY QUASIPERIODIC OSCILLATIONS
- date: 2014-06-27
- words: 3787
- flesch: 53
- summary: On the other hand, the LOFT PDS clearly reveal the presence/absence of the harmonics additional to the 3:2 peaks representing the signature of spot motion. Conclusions We can identify the signatures of spot motion mostly with the harmonic content of the observable signal.
- keywords: a&a; abramowicz; accretion; acta; amplitude; apj; black; capabilities; close; corresponding; doi; effects; epicyclic; figure; flux; frequencies; frequency; harmonics; high; hole; inclination; karas; keplerian; left; levels; loft; models; observed; orbits; oscillations; panel; pds; physics; polytechnica; power; qpos; r3:2; radial; ray; right; rxte; signal; spectra; spot; torus; török; view
- versions: original; plain text
- ap-2129
- author: Majcher, Ariel; Cwiek, Arkadiusz; Cwiok, Mikołaj; Mankiewicz, Lech; Zaremba, Marcin; Zarnecki, Aleksander F.
- title: “PI OF THE SKY” OFF-LINE EXPERIMENT WITH GLORIA
- date: 2014-06-27
- words: 2482
- flesch: 58
- summary: To present the network capabilities and the perfor- mance of the tools, demonstrator experiments have been created in both categories. Tests with constant stars The light curve reconstruction procedure was first tested on selected constant stars.
- keywords: acta; analysis; chile; correction; curve; cut; data; demonstrator; distribution; experiment; figure; framework; gloria; image; level; light; line; luiza; magnitudo; network; object; observations; polytechnica; processing; processor; project; reconstruction; research; results; robotic; sky; star; telescope; user; warsaw
- versions: original; plain text
- ap-2131
- author: Meier, Katja; Biland, A.; Bretz, T.; Buss, J.; Dorner, D.; Einecke, S.; Eisenacher, D.; Hildebrand, D.; Knoetig, M. L.; Krähenbühl, T.; Lustermann, W.; Mannheim, K.; Neise, D.; Overkemping, A.-K.; Paravac, A.; Pauss, F.; Rhode, W.; Ribordy, M.; Steinbring, T.; Temme, F.; Thaele, J.; Vogler, P.; Walter, R.; Weitzel, Q.; Zänglein, M.
- title: FACT — LONGTERM MONITORING OF BRIGHT TeV BLAZARS
- date: 2014-06-27
- words: 2278
- flesch: 67
- summary: The FACT collaboration was founded in 2008 with the aim to examine these silicon photodectectors for use in Cherenkov telescopes and to monitor bright TeV blazars in the longterm. FACT has been optimized for longterm monitoring of bright TeV blazars, to study their variability time scales and flare probability.
- keywords: 421; agn; apd; apds; arxiv; astro; blazars; bright; cherenkov; crab; data; detection; energy; excess; fact; figure; flare; flux; gamma; high; imaging; june; longterm; major; markarian; monitoring; physics; project; radiation; range; rate; sources; telescope; tev; time; vhe
- versions: original; plain text
- ap-2135
- author: Ondruška, Michal; Drienovský, Marián; Čička, Roman; Marônek, Milan; Náplava, Antonín
- title: OPTIMIZING THE WELDING OF PLASTICS WITH THE USE OF DIFFERENTIAL SCANNING CALORIMETRY AND THERMOGRAVIMETRIC ANALYSIS
- date: 2014-06-27
- words: 2233
- flesch: 55
- summary: Thermal welding methods have a number of advan- tages and disadvantages. Welding techniques for thermoplastics are di- vided into three categories[3].
- keywords: acta; air; analysis; atmosphere; calorimetry; cooling; curve; differential; dsc; fig; figure; gas; hdpe; heating; materials; measurements; melting; methods; plastics; polymers; processing; record; sample; science; technology; temperature; thermal; thermoplastics; time; tool; trnava; university; welding
- versions: original; plain text
- ap-2137
- author: Opiela, Rafał; Małek, Katarzyna; Mankiewicz, Lech; Siudek, Małgorzata; Sokołowski, Marcin; Zarnecki, Aleksander Filip
- title: PHOTOMETRIC ANALYSIS OF PI OF THE SKY DATA
- date: 2014-06-27
- words: 3080
- flesch: 62
- summary: The detector response is correlated with the spectral type (B −V or J −K) of catalog stars. observations without any filter (which is the case for most of our data), we normalize our measurements to reference stars measured in V filter. Histograms of the percentage of bad catalog stars in a single frame.
- keywords: acta; analyzed; bad; best; case; catalog; catalog stars; centre; color; correction; curve; data; detector; figure; frame; light; light curve; magnitude; mcorr; measurements; methods; near; new; photometry; polytechnica; project; quality; selected; sky; spectral; stars; system; type; university
- versions: original; plain text
- ap-2138
- author: Sławomir, Wojnar; Rohal-Ilkiv, Boris; Šimončic, Peter; Honek, Marek; Jozef, Csambál
- title: IN-CYLINDER MASS FLOW ESTIMATION AND MANIFOLD PRESSURE DYNAMICS FOR STATE PREDICTION IN SI ENGINES
- date: 2014-06-27
- words: 5495
- flesch: 66
- summary: Measurement with AFM is denoted by a dashed line, computed air mass flow with a full line. In-cylinder flow estimation is crucial for engine control, where an accurate amount of aspired air forms the basis for computing the manipulated variables.
- keywords: acta; afm; afr; air; aspired; combustion; conditions; constant; control; cylinder; cylinder flow; density; doi:10.1109; dynamics; efficiency; engine; engineering; equal; equation; estimation; example; exhaust; fig; figure; flow; fuel; future; gas; intake; intake manifold; manifold; map; mass; measurement; model; number; paper; polytechnica; possible; power; prediction; pressure; ratio; revolutions; speed; strokes; system; temperature; throttle; time; volumetric; wie; wojnar; šimončič; η̃v(p
- versions: original; plain text
- ap-214
- author: Elminir, Hamdy K.; Rahuma, U. A.; Benda, V.
- title: Comparison Between Atmospheric Turbidity Coefficients of Desert and Temperate Climates
- date: 2001-01-02
- words: 8785
- flesch: 59
- summary: � � . (3) The evaluation of TL from IN requires the knowledge of �R. The values of �R originally by Feussner and Dubois, [13] were presented by: � ��R A� � �9 4 0 9 1. .
- keywords: acta; adobe; aerosol; air; annual; appendix; area; atmosphere; atmospheric turbidity; attenuation; average; b1 b2; b2 b3; bands; beam; cairo; cement; clean; climate; coefficient; comparison; czech; data; day; desert; different; direct; dry; dust; earth; emissions; energy; equation; extinction; extraterrestrial; factor; fallout; false; fig; filters; formula; global; helwan; higher; house; http://ctn.cvut.cz/ap/; humidity; index; industrial; kwh; level; linke; mass; mean; measured; measurements; monthly; ngström; normal; number; optical; particles; period; pollution; polytechnica; prague; precipitable; presence; publishing; radiation; reduction; relative; republic; results; selected; site; solar; solar radiation; spectral; study; summer; surface; table; technical; temperature; thickness; total; true; turbidity; university; values; vapor; variation; vol; water
- versions: original; plain text
- ap-2140
- author: Šimon, Vojtěch
- title: LOW-MASS BINARY X-RAY SOURCES: MONITORING WITH VARIOUS SATELLITES
- date: 2014-06-27
- words: 4442
- flesch: 72
- summary: A very hard X-ray band like the one in BAT/Swift sometimes maps quite a different activity (probably coming from a different spectral component) than that detected by monitors observing in soft X-ray band. When some critical mass density of the disk is reached, strong accretion of matter from the disk onto the central com- pact object triggers the outburst, hence a fast increase of X-ray intensity
- keywords: accretion; activity; apj; aql; asm; band; bat; binaries; binary; compact; curve; cycle; data; disk; evolution; fig; figure; fluctuations; intensity; isum; kev; large; light; lmxbs; long; low; luminosity; mass; means; monitoring; monitors; object; observations; observed; outburst; peak; processes; profile; ray; rays; region; rxte; soft; soft x; sources; spectral; swift; term; time; variations; x-1
- versions: original; plain text
- ap-2143
- author: Stuchlik, Zdenek; Schee, Jan
- title: ON OBSERVATIONAL PHENOMENA RELATED TO KERR SUPERSPINARS
- date: 2014-06-27
- words: 2710
- flesch: 60
- summary: We conclude that near-extreme superspinning Kerr geometries are much more efficient for the occurrence of ultra-high energy collisions then the vicinity of the 255 Zdenek Stuchlik, Jan Schee Acta Polytechnica 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.0 0.2 0.4 0.6 0.8 1.0 frequency shift g sp e c if ic e n e rg y fl u x p=2.0 Θ0=30° rsusp=0.1 Figure 2. Ultra-high energy collisions in the superspinning kerr geometry.
- keywords: black; collisions; disc; doi; energy; escape; extreme; field; figure; frequency; high; inclination; keplerian; kerr; lines; naked; near; observer; particles; phenomena; photons; profiled; radiation; related; representative; ring; schee; shift; singularity; solid; spectral; superspinars; ultra; values
- versions: original; plain text
- ap-2144
- author: Shershunova, Ekaterina Alexandrovna; Malashin, Maxim; Moshkunov, Sergei; Khomich, Vladislav
- title: DIFFUSE DBD IN ATMOSPHERIC AIR AT DIFFERENT APPLIED PULSE WIDTHS
- date: 2015-02-28
- words: 2020
- flesch: 64
- summary: As a rule, diffuse high-current DBD in atmospheric air is realized by applying voltage pulses of submi- crosecond duration to the electrodes. Many re- searchers have shown that the diffuse mode of DBD with two discharge peaks per one voltage pulse can be ignited at low pressure, and even at atmospheric pressure, in gases such as neon, argon and helium by applying high voltage pulses with short durations to the electrodes [1, 2].
- keywords: air; applied; atmospheric; barrier; current; dbd; dielectric; diffuse; discharge; electrodes; energy; experimental; figure; gap; khomich; malashin; moshkunov; peak; power; primary; pulse; secondary; vin; voltage; volume; width
- versions: original; plain text
- ap-2147
- author: Domonkos, Mária; Ižák, Tibor; Štolcová, Lucie; Proška, Jan; Demo, Pavel; Kromka, Alexander
- title: STRUCTURING OF DIAMOND FILMS USING MICROSPHERE LITHOGRAPHY
- date: 2014-10-31
- words: 2550
- flesch: 65
- summary: For example, increasing the surface area-to-volume ratio of diamond films improves the field-emission proper- ties by introducing the enhancement effect of the local field near the tips [5]. Generally, various nanostruc- tures can be fabricated from diamond films known as nanowires, nanorods, nanoneedles, etc.
- keywords: applications; arrays; band; bonds; carbon; ch4; chemical; czech; deposition; diamond; electron; etching; figure; films; gas; grain; high; like; lithography; mask; mcd; method; microsphere; ncd; phys; plasma; preparation; process; properties; rie; self; structures; structuring; surface; table; thin
- versions: original; plain text
- ap-2156
- author: Kulveit, Jan
- title: ISING MODEL SIMULATIONS AS A TESTBED OF NUCLEATION THEORY
- date: 2015-02-28
- words: 3852
- flesch: 58
- summary: In the development of nucleation theory, there is obvi- ously a huge space for extensions and improvements of classical theory. Testbed systems and results Even in a simulation, when modeling real systems us- ing molecular dynamics, nucleation theory gets tested along with various other simulation properties (e.g., a description of interatomic forces).
- keywords: acta; assumptions; barrier; case; chemical; classical; clusters; cnt; critical; czech; demo; doi:10.1103; dynamics; energy; events; frenkel; hard; heterogeneous; important; lattice; letters; model; new; nucleation; nucleation theory; nuclei; parameters; phase; physical; physics; polytechnica; process; rate; republic; results; review; shape; simulation; size; small; space; spheres; stable; studies; surface; systems; technology; temperature; term; testbed; theory; time; ∆gn
- versions: original; plain text
- ap-2159
- author: Prošek, Zdeněk; Králík, Vlastimil; Topič, Jaroslav; Nežerka, Václav; Indrová, Kateřina; Tesárek, Pavel
- title: MICROSTRUCTURE DESCRIPTION AND MICROMECHANICAL PROPERTIES OF SPRUCE WOOD
- date: 2015-02-28
- words: 6449
- flesch: 58
- summary: Experimental micromechanical characterisation of wood cell walls. doi:10.1007/s00339–004–2864-y [15] Gindl, W. and Schöberl, T.: The significance of the elastic modulus of wood cell walls obtained from nanoindentation measurements.
- keywords: acta; amplitude; angle; area; cell; cell walls; chemical; contact; cross; czech; data; depth; displacement; dynamic; earlywood; elastic; elastic stiffness; engineering; fibers; fibrils; figure; force; gindl; gpa; hardness; indentation; indentation modulus; indenter; individual; information; lamella; latewood; layer; loading; longitudinal; mapping; material; measured; method; micromechanical; microscopy; microstructure; middle; modulus; nanodma; nanoindentation; parenchymal; phases; polytechnica; properties; quasi; results; samples; secondary; section; spruce; spruce wood; static; stiffness; storage; surface; thickness; timber; tip; tissues; tracheids; values; vol; wall; wood; wood cell
- versions: original; plain text
- ap-216
- author: Svoboda, V.; Šiktancová, D.
- title: Determining the Permeable Efficiency of Elements in Transport Networks
- date: 2001-01-02
- words: 1774
- flesch: 46
- summary: Keywords: the transport networks, elements in transport network, disintegration of transport flow in transport networks, permeability of elements in transport network, permeability of networks, determining of the permeability of edges, deterministic and stochastic work regimes, systems of queuing theory, a transcendental equation. In order to determine the permeability of the trans- port net element with a stochastic work regime, operations research methods were mainly used, in particular queuing theory for typical service systems and stock theory for systems where the transport sets are made up of transport elements.
- keywords: /qfactor; adobe; edges; elements; entry; evaluation; false; flow; gaps; mean; methods; nets; network; node; number; pdf; permeability; requirements; service; set; system; theory; time; transport; true; unit; use
- versions: original; plain text
- ap-2160
- author: Remes, Zdeněk; Novak, Tomas; Stuchlik, Jiri; Stuchlikova, The-ha; Dřínek, Vladislav; Fajgar, Radek; Zhuravlev, Konstantin
- title: INFRARED PHOTOLUMINESCENCE SPECTRA OF PBS NANOPARTICLES PREPARED BY LANGMUIR–BLODGETT AND LASER ABLATION METHODS
- date: 2014-12-31
- words: 2084
- flesch: 52
- summary: We apply infrared PL to study the relative PL quantum efficiency and the thermal stability of PbS nanoparticles prepared in the form of thin layers by the Langmuir–Blodgett and laser ablation methods on glass substrates. The room temperature spectrally corrected and normalized PL spectra of a 50 nm layer of PbS nanoparticles deposited on a Corning glass #7059 substrate and annealed for 5 min in air at various temperatures.
- keywords: ablation; ascr; blodgett; corning; czech; deposition; fig; glass; higher; infrared; institute; intensity; langmuir; laser; measurements; nanoparticles; optical; pbs; pbs nanoparticles; photoluminescence; physics; prague; quantum; samples; setup; silica; spectra; substrates; target; technique; temperature; thin; v.v.i
- versions: original; plain text
- ap-2164
- author: Sveshnikov, Alexey; Demo, Pavel; Kožíšek, Zdeněk; Tichá, Petra
- title: SHAPE OF A NUCLEUS GROWING ON STRONGLY CURVED SURFACE OF A NANOFIBER
- date: 2014-12-31
- words: 2104
- flesch: 52
- summary: This assumption leads to the conclusion that growing nuclei have the shape of a spherical cap. Taking into account huge amount of money paid every year for restoration of surface of civil constructions every factor which can reduce the rate of required treatment will lead to appreciable savings.
- keywords: acta; axis; civil; contact; cos; curvature; deviation; energy; engineering; equilibrium; free; material; metastable; nanofiber; nanoparticles; nanotextile; nucleation; nuclei; nucleus; perpendicular; process; radius; shape; spherical; surface; term; volume
- versions: original; plain text
- ap-2169
- author: Gromada, Daniel; Pošta, Severin
- title: AUTOMORPHISMS OF ALGEBRAS AND ORTHOGONAL POLYNOMIALS
- date: 2014-12-31
- words: 2407
- flesch: 73
- summary: [A−1SA]j,j−1, which leads to the condition |aj|2 = |aj−1|2 S̄j,j−1 Sj−1,j = |aj−1|2 N − j Suitable automorphisms together with a complete classification of representations of some algebras can be used to generate some sets of orthogonal polynomials “at no cost”.
- keywords: algebra; askey; case; classification; inner; irreducible; j−1; krawtchouk; lie; matrices; matrix; orthogonal; parameters; polynomials; product; q−n; racah; recurrence; relation; representations; sl2; terwilliger; u′q(so3; wilson; µ(x; ϕ(i1
- versions: original; plain text
- ap-218
- author: Vorel, M.; Leidich, E.
- title: Accuracy of Determining Stress Intensity Factors in Some Numerical Programs
- date: 2001-01-02
- words: 3725
- flesch: 58
- summary: To take advantage of the programs’ ex- tensive functions and high reliability a number of user subroutines for solving stress intensity factors need to be programmed. As regards the accuracy of stress intensity factors, only single programs have been compared with analytical solu- tions so far, and no comparison of the programs with each other has been presented.
- keywords: accuracy; acta; adobe; analyses; analytical; beam; coarse; computational; crack; cracked; dimensional; edge; elements; engineering; factors; false; fig; fine; fineness; flat; fracture; franc3d; influence; intensity; intensity factors; marc; medium; mesh; method; models; mpa; numerical; plate; polytechnica; problems; programs; quality; results; semielliptical; single; solutions; stress; stress intensity; study; technical; true; university; user; values; version; vol
- versions: original; plain text
- ap-2180
- author: Sovják, Radoslav; Rašínová, Jana; Máca, Petr
- title: EFFECTIVE FRACTURE ENERGY OF ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE UNDER INCREASED STRAIN RATES
- date: 2014-10-31
- words: 2882
- flesch: 63
- summary: Development of the dynamic increase factor. and increased strain rate loading, respectively. In addition, it is found that higher fibre volume fractions tend to decrease the sensitivity of UHPFRC to increased strain rates.
- keywords: beams; capacity; concrete; content; effective; effective fracture; energy; experimental; fibre; figure; fracture; fracture energy; high; higher; impact; loading; lower; material; performance; pull; quasi; rates; static; strain; strain rates; strength; study; s−1; table; tensile; uhpfrc; ultra; volume
- versions: original; plain text
- ap-2195
- author: Pikna, Peter; Píč, Vlastimil; Benda, Vítězslav; Fejfar, Antonín
- title: ANNEALING OF POLYCRYSTALLINE THIN FILM SILICON SOLAR CELLS IN WATER VAPOUR AT SUB-ATMOSPHERIC PRESSURES
- date: 2014-10-31
- words: 4261
- flesch: 56
- summary: voltage VOC is commonly used as a silicon quality fac- tor. Voltage VOC at room temperature is not depicted in the graph.
- keywords: annealing; cell; chamber; circuit; corresponding; current; curves; data; detector; different; electrical; fig; figure; film; flash; generated; intensity; light; lock; measured; measurement; method; mpa; open; passivation; polycrystalline; pressure; room; sample; silicon; solar; solar cell; suns; temperature; thermo; thin; time; vapour; voc; voc method; voltage; voltage voc; vth; water
- versions: original; plain text
- ap-2197
- author: Cutroneo, Mariapompea; Torrisi, Lorenzo; Mackova, Anna; Velyhan, Andriy
- title: POLYMERS CONTAINING Cu NANOPARTICLES IRRADIATED BY LASER TO ENHANCE THE ION ACCELERATION
- date: 2015-06-30
- words: 2579
- flesch: 58
- summary: The composition and the geometry of the target absorb high laser energy and generate hot plasmas and high charge separation, inducing high ion acceleration, as will be reported. 2. Material and Methods The high-power photodissociation iodine laser system of the PALS Research Center in Prague, operating at 1.315 µm wavelength, laser energy ranging between 450 and 600 J, pulse duration 300 ps, and intensity of 1015 W/cm2, was employed for the experiments pre- sented here [7].
- keywords: absorption; acceleration; acta; charge; conditions; czech; density; direction; electron; energy; film; forward; high; intensity; ions; irradiating; kinetic; laser; mev; mylar; nanoparticles; parabola; physics; plasma; polytechnica; position; proton; pulse; pure; sic; spectra; surface; target; thickness; thin; torrisi; tps
- versions: original; plain text
- ap-2199
- author: Torrisi, Lorenzo; Cutroneo, Mariapompea; Ullschmied, Jiri
- title: HYDROGENATED TARGETS FOR HIGH ENERGY PROTON GENERATION FROM LASER IRRADIATING IN TNSA REGIME
- date: 2015-06-30
- words: 2608
- flesch: 56
- summary: Higher ion acceleration is therefore expected, as reported in Fig. MeV pro- ton beams can be applied in various areas of interest, from biomedicine (hadron therapy) to nuclear physics (nuclear fusion processes), from microelectronics (semi- conductor doping) to laser ion source (ion injection in accelerators) and to other fields [1, 2].
- keywords: absorption; acceleration; acta; carbon; case; cnt; cutroneo; energy; fe2o3; fig; high; ions; irradiation; kinetic; laser; low; maximum; mev; nanostructures; order; plasma; polyethylene; polymer; polytechnica; proton; pure; regime; sic; target; thickness; tnsa; tof; torrisi; tps; wavelength
- versions: original; plain text
- ap-220
- author: Elsayed, Ashraf El-Shahat; Grünwald, A.; Dvořák, D.
- title: Pollutant Removal from Highway Runoff Using Retention/Detention Units
- date: 2001-01-02
- words: 4005
- flesch: 52
- summary: In order to study the effect of traffic vol- ume on highway runoff characteristics, we compare the runoff characteristics collected from the D1 and D5, which have different traffic volumes. Numerous factors may affect the presence of these constitu- ents and the quality of highway runoff, including: traffic volume, precipitation characteristics, roadway surface type, the nature of the pollutants themselves, surrounding land use, and seasonal considerations.
- keywords: adobe; chambers; characteristics; collected; concentration; constituents; czech; date; detention; effect; false; filter; flow; greases; grit; highway; hydrocarbons; influent; monitoring; n c; o n; oil; organic; particulate; prague; quality; removal; results; rudná; runoff; samples; sediment; site; solids; storage; study; suspended; time; total; traffic; treatment; true; tss; units; urban; vol
- versions: original; plain text
- ap-2200
- author: Kurbanismailov, Vali Suliymanovich; Omarov, Omar Alievich; Ragimkhanov, Gadjimirza Balaglanovich; Aliverdiev, Abutrab Alexandrovich
- title: ABOUT THE UNIFORMITY AND THE STABILITY OF A VOLUME DISCHARGE IN HELIUM IN NEAR-ATMOSPHERIC PRESSURE
- date: 2015-08-31
- words: 2535
- flesch: 62
- summary: Keywords: discharge formation; volume discharge; streamer; discharge plasma. Introduction One of the applications of volume discharges in inert gases is gas laser pumping.
- keywords: anode; atm; atmospheric; burning; cathode; channel; characteristics; cm2; current; density; discharge; duration; electrodes; fig; figure; gas; glow; growth; helium; high; increase; initial; ionization; kurbanismailov; mode; omarov; phys; physics; plasma; pressure; pulse; results; spark; stage; time; uniformity; v.s.; voltage; volume; volume discharge
- versions: original; plain text
- ap-2201
- author: Caballero-Garcia, Maria D.; Jelinek, M.; Castro-Tirado, A.; Hudec, R.; Cunniffe, R.; Rabaza, O.; Sabau-Graziati, L.
- title: INITIAL FOLLOW-UP OF OPTICAL TRANSIENTS WITH COLORES USING THE BOOTES NETWORK
- date: 2015-04-30
- words: 2934
- flesch: 65
- summary: RH acknowledges GACR grant 13-33324S. References [1] Castro-Tirado, A. J., Soldán, J., Bernas, M. et al. [5] Barthelmy, S. D., Baumgartner, W. H., Cummings, J. R., et al. GRB 130606A, Swift-BAT refined analysis.
- keywords: 130606a; astronomer; astrophysical; bootes-2; burst; castro; colores; czech; emission; follow; following; gamma; grb; grbs; j17154683; jelinek; network; new; nova; observations; observed; optical; ots; range; ray; results; robotic; scientific; sources; spectrograph; stars; study; swift; system; tcp; telegram; telescopes; tirado; transient
- versions: original; plain text
- ap-2203
- author: Domalapally, Phani Kumar; Entler, Slavomir
- title: COMPARISON OF COOLING SCHEMES FOR HIGH HEAT FLUX COMPONENTS COOLING IN FUSION REACTORS
- date: 2015-04-30
- words: 6123
- flesch: 65
- summary: Some components of fusion reactors receive high heat fluxes either during startup and shutdown, or while the machine is in operation. Liquid metals are proposed as coolants because of their high thermal conductivity and high heat capacity, which enable them to accommodate high heat fluxes (HHF) with relatively low velocities.
- keywords: alloy; applications; area; channel; chf; comparison; components; concept; coolant; cooling; design; divertor; drop; engineering; et.al; experiments; figure; finger; fins; flow; flux; fluxes; foam; fusion; fusion engineering; heat; heat flux; helium; high; high heat; htc; hypervapotron; increase; inlet; iter; jet; liquid; media; metal; modular; module; mpa; order; plasma; plate; porous; power; pressure; pumping; reactor; schemes; screw; section; smooth; surface; swirl; system; target; techniques; temperature; thermal; transfer; tube; use; water
- versions: original; plain text
- ap-2212
- author: Beuchert, Tobias; Wilms, Jörn; Kadler, Matthias; Longinotti, Anna Lia; Guainazzi, Matteo; Miniutti, Giovanni; de la Calle, Ignacio
- title: X-RAY VARIABILITY STUDY OF POLAR SCATTERED SEYFERT1 GALAXIES
- date: 2014-08-31
- words: 2937
- flesch: 64
- summary: The shortest measured timescale of 5 days is due to warm absorber variability. References [1] R. Antonucci, 2012, Astronomical and Astrophysical Transactions, 27, 557 [2] Barlow, R. 2004, arXiv:physics/0406120 [3] A. J. Blustin, et al., 2005, A&A, 431, 111 [4] S. Chakravorty, et al., 2008, MNRAS, 384, L24, doi:10.1111/j.1745-3933.2007.00414.x [5] E. Costantini, 2010, Space Sci Rev, 157, 265, doi:10.1007/s11214-010-9706-3 [6] Dorodnitsyn, A., & Kallman, T. 2012, ApJ, 761, 70, doi:10.1088/0004-637X/761/1/70 [7] Fukumura, K., Kazanas, D., Contopoulos, I., & Behar, E. 2010, ApJ, 715, 636, doi:10.1088/0004-637X/715/1/636 [8] J. H. Krolik, et al., 1988, ApJ, 329, 702, doi:10.1086/166414 [9] J. H. Krolik, et al., 2001, ApJ, 561, 684, doi:10.1086/323442 [10] A. M. Lohfink, et al., 2012, ApJ, Lett, 749, L31, doi:10.1088/2041-8205/749/2/L31 [11] G. Matt, et al., 2011, A&A, 533, A1, doi:10.1051/0004-6361/201116443 [12] L. Miller, et al., 2007, A&A, 463, 131, doi:10.1051/0004-6361:20066548 [13] Markowitz, A. G., Krumpe, M., & Nikutta, R. 2014, MNRAS, 439, 1403, doi:10.1093/mnras/stt2492 [14] Nenkova, M., Sirocky, M. M., Ivezić, Ž., & Elitzur, M. 2008, ApJ, 685, 147, doi:10.1086/590482 [15] Nenkova, M., Sirocky, M. M., Nikutta, R., Ivezić, Ž., & Elitzur, M. 2008, ApJ, 685, 160, doi:10.1086/590483 [16] P. Padovani, et al., 1988, A&A, 205, 53 [17] B. M. Peterson., 1993, PASP, 105, 247, doi:10.1086/133140 [18] E. A. Pier, et al., 1992, ApJ, 401, 99, doi:10.1086/172042 [19] Reynolds, C. S., & Fabian, A. C. 1995, MNRAS, 273, 1167
- keywords: absorber; absorption; apj; column; confidence; density; distance; fairall; fig; figure; galaxies; gas; ionized; line; mnras; model; mrk; neutral; newton; ngc; noise; observations; outer; polar; ray; sample; seyfert; sight; source; swift; table; timescales; torus; variability; variable; warm; xmm
- versions: original; plain text
- ap-2214
- author: Karpov, Sergey; Beskin, Grigory; Plokhotnichenko, Vladimir
- title: SEARCH FOR ISOLATED BLACK HOLES: PAST, PRESENT, FUTURE
- date: 2014-08-31
- words: 2887
- flesch: 57
- summary: A large fraction of black hole emission is generated inside the 2rg sphere, and so carries information about the physical conditions of space-time very close to the event horizon. A study of these flares in black hole emission therefore provides a way to probe extreme space-time regions directly very close to the horizon.
- keywords: accretion; acta; analysis; arxiv; astro; astrophysical; beskin; black; black hole; emission; energy; et al; event; field; flares; flow; high; hole; horizon; interstellar; isolated; magnetic; mania; mass; nonthermal; objects; observations; optical; plasma; polytechnica; property; rate; ray; resolution; search; shvartsman; single; space; spectra; stellar; temporal; thermal; time; variability; way
- versions: original; plain text
- ap-2216
- author: Koeny, Marcus; Blanik, Nikolai; Yu, Xinchi; Czaplik, Michael; Walter, Marian; Rossaint, Rolf; Blazek, Vladimir; Leonhardt, Steffen
- title: USING PHOTOPLETHYSMOGRAPHY IMAGING FOR OBJECTIVE CONTACTLESS PAIN ASSESSMENT
- date: 2014-08-31
- words: 4224
- flesch: 59
- summary: Data recordings in the University Hospital in Aachen The ECG and PPG signals used to develop and evalu- ate the described algorithms were recorded over a time period of two months anonymously at the University Hospital of Aachen, Germany, after approval by the local ethics committee. Comparing Heart Rate Variability In addition to the time delay between the ECG signal and the PPG signal, the sample times of the ECG and PPG signals, are relevant for the precision of the measurement.
- keywords: aachen; acta; addition; algorithm; analgesia; analysis; anesthesia; ani; artifacts; assessment; available; beat; camera; computation; contactless; delay; detection; ecg; example; figure; filter; heart; hrv; image; imaging; index; intervals; interventions; local; measurement; method; nociception; pain; patient; peaks; polytechnica; postoperative; ppg; ppg signal; ppgi; rate; results; sample; signal; skin; standard; stress; surgical; system; time; university; variability; work
- versions: original; plain text
- ap-2218
- author: Schillaci, Francesco; Cirrone, Giuseppe A. P.; Korn, George; Maggiore, Mario; Margarone, Daniele; Calabretta, Luciano; Cavallaro, Salvatore; Cuttone, Giacomo; Gammino, Santo; Krasa, Josef; Prokupek, Jan; Velyhan, Andriy; Renis, Marcella; Romano, Francesco; Tomasello, Barbara; Torrisi, Lorenzo; Cutroneo, Mariapompea; Tramontana, Antonella
- title: ELIMED: MEDICAL APPLICATION AT ELI-BEAMLINES. STATUS OF THE COLLABORATION AND FIRST RESULTS
- date: 2014-08-31
- words: 3617
- flesch: 61
- summary: Ac- cording to already performed Particle in Cell (PIC) simulations, proton beams up to 20 − 30 MeV will be produced, Second phase. [13] Cirrone, G. A. P. et al: Diagnostic for the radiotherapy use of laser accelerated proton beams.
- keywords: acceleration; acta; available; beam; beamlines; deflection; design; different; direction; electric; eli; elimed; energy; experimental; facility; field; figure; high; icr; infn; ion; italy; laser; light; lns; magnetic; magnets; maximum; medical; mev; new; order; pals; parabola; particles; phase; phys; polytechnica; project; proton; range; results; selector; slit; spectrometer; spread; system; target; thomson; transport
- versions: original; plain text
- ap-222
- author: Grünwald, A.; Šťastný, B.; Slavíčková, K.; Slavíček, M.
- title: Effect of the Distribution System on Drinking Water Quality
- date: 2001-01-03
- words: 2578
- flesch: 57
- summary: The overall rate of chlorine decay can be expressed as follows: � ��c b f H w� � � �k k R c c where � is the rate of chlorine decay in mg�l�1�d��, kb first order decay coefficient in d ��, c chlorine concentration in bulk flow in mg�l�1, kf mass transfer coefficient in m�d �1, RH hydraulic radius in m, cw chlorine concentration at the pipe wall in mg�l �1. The chlorine decay coefficient k1 calculated from the values of chlorine concentrations measured in the period 1997–2000 ranged from 0.252 d�1 to 1.336 d�1 and their coefficient of correlation varied from 0.637 to 0.999.
- keywords: active; adobe; bulk; chlorine; coefficient; concentration; content; czech; decay; deposits; distribution; drinking; effect; false; fig; flow; formation; particles; pdf; pipelines; plav; products; quality; residence; sample; sedimentation; shaft; solids; system; thm; time; true; uptake; values; vol; water; wtp
- versions: original; plain text
- ap-2222
- author: Sochora, Vjaceslav; Karas, Vladimír; Svoboda, Jirí; Dovciak, Michal
- title: BEYOND THE STANDARD MODEL OF THE DISC–LINE SPECTRAL PROFILES FROM BLACK HOLE ACCRETION DISCS
- date: 2014-08-31
- words: 2283
- flesch: 68
- summary: Model spectrum considering background 3.1. Model spectrum and analysis by LOFT 2.1.
- keywords: accretion; background; black; components; data; disc; emissivity; energy; figure; galactic; hole; kev; lad; large; law; line; loft; model; parameters; peaks; power; profile; ray; rings; shifts; spectral; spectrum; spin; timing; values
- versions: original; plain text
- ap-2224
- author: Vojta, Vladimír
- title: FRACTIONAL CALCULUS AND LAMBERT FUNCTION I. LIOUVILLE–WEYL FRACTIONAL INTEGRAL
- date: 2014-08-31
- words: 8221
- flesch: 79
- summary: Function uy(Ey(y) + e−y)/y of complex variable y ∈ C has for fixed u ∈ C only one singular point y = 0 in which this function has non-removable point singularity. They can also be found in technological practice - we mention time-dependent shear, bulk and the Young moduli of linear viscoelastic materials, because they are Laplace transforms of the relevant nonnegative relaxation spectra
- keywords: 2iπ; = t; a(a; acta; bickley; c+i∞; calculus; case; complex; diagonal; equal; equation; example; exponential; e−yu; f(t; f(x; following; fractional; fractional integral; function; g(y; gamma; integral; iy−f)(y; lambert; laplace; laplace transform; left; liouville; mellin; mellin transform; monotone; order; point; polytechnica; proof; region; right; sin; solution; t dt; theorem; transform; unilateral; u−y−1; variable; vojta; w0(1; w0(eu; weyl; γ(y; ∫ ∞
- versions: original; plain text
- ap-2227
- author: Tsyrenov, Dmitriy; Semenov, Aleksandr; Smirnyagina, Natalia
- title: MODERNIZATION FEATURES OF A VACUUM INSTALLATION BASED ON LOW-PRESSURE ARC DISCHARGE FOR COMPOSITE TIN-CU LAYERS FORMATION
- date: 2015-04-30
- words: 1672
- flesch: 58
- summary: This effective increase in the hardness of the composite layer may be connected with the absence of the Ti drop phase and with the discovery of Cu atoms on the borders of the TiN grains. Introduction In this paper, we propose a hybrid technology for forming composite layers.
- keywords: arc; cathode; chamber; coatings; composite; copper; deposition; figure; films; hardness; installation; layers; magnetic; magnetron; microstructure; nanocomposite; parameters; phase; planar; ray; results; structure; surface; table; target; tin; titanium; vacuum; vol
- versions: original; plain text
- ap-2228
- author: Davydova, Marina; Smid, Jiri; Hubicka, Zdenek; Kromka, Alexander
- title: DEPOSITION CARBON NANOSTRUCTURES BY SURFATRON GENERATED DISCHARGE
- date: 2014-12-31
- words: 2208
- flesch: 59
- summary: Keywords: surfatron, carbon nanostructures, microwave plasma, PECVD. However, deposition of carbon nanostructures by SWD is not broadly used.
- keywords: acta; band; carbon; carbon nanostructures; ch4; chamber; cm−1; co2; deposition; discharge; distance; doi:10.1016; figure; films; flow; gas; gases; growth; microwave; mixture; nanostructures; pecvd; plasma; polytechnica; process; raman; sccm; sem; shower; spectrum; substrate; surface; surfatron; swd; system; temperature; thin
- versions: original; plain text
- ap-2230
- author: Lisy, Viliam
- title: ALTERNATIVE SELECTION FUNCTIONS FOR INFORMATION SET MONTE CARLO TREE SEARCH
- date: 2014-10-31
- words: 6810
- flesch: 67
- summary: Game theory provides means to deal with all these complications, but previous attempts to adapt MCTS to imperfect information games generally did not eval- uate the properties of the strategies from the perspec- tive of game theory. Keywords: Monte Carlo Tree Search, imperfect information game, selection function, Regret matching.
- keywords: action; algorithm; best; cards; carlo; computation; convergence; current; different; distribution; equilibrium; exp3; exploitability; exploration; extensive; function; game; goofspiel; head; imperfect; imperfect information; information; information games; information set; iterations; line; matches; matching; mcts; monte; nash; nature; nodes; number; opponent; performance; phantom; player; playing; position; probability; rand; regret; reward; search; second; section; selection; set; state; strategies; strategy; sum; table; tac; terminal; tic; time; toe; tree; uct; use; ● ●
- versions: original; plain text
- ap-224
- author: Ismail, Ashraf Fouad Hafez
- title: Class Representation of Shapes Using Qualitative-codes
- date: 2001-01-03
- words: 11774
- flesch: 59
- summary: • The second A-code (Axx-code) set QA2: � �Q A A A A A A A AA nil2 0 0 0� � � � � � � � � � �, , , , , , , . • L- code set QL2: � �Q L L L L L L LL 2 0 0 0� � � � � � � � � � �, , , , , , .
- keywords: 3/2001; acta; adjacent; aggregation; angle; attributes; change; characteristics; circuit; class; code; complete; conceptual; connected; contour; convexity; curvature; curve; czech; description; design; different; direction; discrete; edge; eds; encoding; false; figure; finite; following; formalism; geometric; granularity; house; http://ctn.cvut.cz/ap/; information; interval; labels; landmark; length; line; magnitude; modeling; multiple; new; nodes; numeric; order; particular; patterns; point; polytechnica; possible; previous; primary; properties; property; publishing; qcodes; qsentence; qualitative; qualitative shape; range; reasoning; regions; relative; representation; scanning; scheme; sequence; set; sets; shape; shape representation; sign; single; singular; smaller; spatial; symbolic; symbols; table; tangential; technical; terms; true; university; value; vertex; vol; � k; � y; � z
- versions: original; plain text
- ap-2241
- author: Duras, Julia; Kalentev, Oleksander; Schneider, Ralf; Matyash, Konstantin; Lüskow, Karl Felix; Geiser, Jürgen
- title: ELECTROSTATIC ION THRUSTERS - TOWARDS PREDICTIVE MODELING
- date: 2015-02-28
- words: 4215
- flesch: 65
- summary: Keywords: Ion thruster, Monte-Carlo method, terrestrial testing of thrusters, interaction with vessel walls. Modeling strategy The most complete model resolving all time scales of ion thrusters would be a direct coupling of a kinetic plasma model with a molecular dynamics model for the walls.
- keywords: 10−4; angle; angular; carlo; channel; deposited; deposition; different; distribution; emission; emitted; end; energy; erosion; exit; fig; figure; flux; fraction; interaction; ion; ion thruster; ions; like; maximum; measurements; model; modeling; monte; order; particles; plasma; plume; poloidal; propulsion; source; space; sputtered; surface; terrestrial; test; testing; thruster; total; vacuum; vessel; vessel walls; walls
- versions: original; plain text
- ap-2244
- author: Lisuch, Julius; Dorcak, Dusan; Spisak, Jan
- title: EFFECTIVE USE OF ROTARY FURNACE SHELL HEAT
- date: 2014-12-31
- words: 3407
- flesch: 64
- summary: [%] Q material ln 508 0.54 Q medium ln 518 0.55 Q brought from furnace shell through primary air 5000 5.34 Q burner 87600 93.56 Sum 93626 100 Escaped heat [%] QH2O evaporated 654 0.71 Q decomposition MgCO3 31304 33.82 Q decomposition CaCO3 2498 2.70 Q decomposition FeCO3 453 0.49 Q medium Out 34934 37.74 Q mematerial Out 12890 13.93 Q furnace shell losses 4825 5.21 Q brought from furnace shell through primary air 5000 5.40 Sum 92558 100 Table 5.
- keywords: air; batch; burning; ccsrf; clinker; combustion; cooling; figure; flue; fuel; furnace; furnace shell; gas; heat; increase; inner; lining; losses; magnesite; material; printing; process; processes; rotary; rotary furnace; shell; shell heat; simulation; slovakia; state; surface; table; technical; technological; temperature; thermal; total; transfer; ts1; use
- versions: original; plain text
- ap-2252
- author: Kelar, Jakub; Čech, Jan; Slavíček, Pavel
- title: ENERGY EFFICIENCY OF PLANAR DISCHARGE FOR INDUSTRIAL APPLICATIONS
- date: 2015-04-30
- words: 2283
- flesch: 60
- summary: Keywords: dielectric barrier discharge; DCSBD; electrical efficiency; power estimation; error analysis. The artificially introduced current-voltage waveform distortions lead to relatively small errors in power estimation of the order of a few percent, even when relatively bad experimental conditions are assumed (i.e., phase shift < 50 ns and noise level < 2 bits).
- keywords: air; atmospheric; barrier; current; dcsbd; device; dielectric; discharge; efficiency; electrodes; energy; errors; estimation; experimental; fig; figure; high; input; integration; measured; measurements; noise; non; phase; physics; planar; plasma; power; pressure; shift; source; surface; voltage; waveforms
- versions: original; plain text
- ap-2257
- author: Ondac, Peter; Horacek, Jan; Seidl, Jakub; Vondrácek, Petr; Müller, Hans Werner; Adámek, Jirí; Nielsen, Anders Henry
- title: COMPARISON BETWEEN 2D TURBULENCE MODEL ESEL AND EXPERIMENTAL DATA FROM AUG AND COMPASS TOKAMAKS
- date: 2015-04-30
- words: 5904
- flesch: 60
- summary: The differences in the simulations were in radial boundary conditions (Neumann or Dirichlet) for plasma density, plasma potential, radial electric field and electron tem- perature, value of the the neoclassical Pfirsch-Schlüter perpendicular collisional diffusion coefficient for parti- cles D′⊥n, value of parallel loss time for particles τ ′ ‖n or in the form of the bracket Ψ in the last term in the equation (9) (where the exponential form is shown). The gradient of the radial profile of plasma density in the ESEL simulations matching the ASDEX Upgrade plasma is too small compared with the experiment.
- keywords: agreement; asdex; asdex upgrade; ball; compass; computational; data; density; diffusion; direction; dissipation; domain; edge; electric; electron; equation; esel; esel model; experimental; exponential; field; figure; fluctuations; form; garcia; increase; layer; lcfs; line; linear; loss; magnetic; mean; measured; measurements; model; parallel; particle; pen; physics; plasma; plasma density; plasma potential; poloidal; potential; probes; profile; radial; region; relative; sheath; simulations; sol; solid; temperature; term; time; tokamak; transport; turbulence; upgrade; value; vol
- versions: original; plain text
- ap-226
- author: Haghi, A. K.
- title: A Mathematical Model of theDrying Process
- date: 2001-01-03
- words: 2558
- flesch: 51
- summary: These parameters include the operation conditions of the dryer, such as the initial moisture content of the leather, heat and mass transfer coefficients, drying air moisture content, and dryer air temperature. The effect of drying air moisture content, and the calcu- lated results of the model are shown in Figure 6.
- keywords: adobe; air; calculated; center; coefficients; constant; content; difference; dryer; drying; effect; false; fig; figure; heat; high; humidity; initial; leather; mass; mathematical; model; moisture; moisture content; parameters; rate; rise; small; surface; temperature; time; transfer; true; vol
- versions: original; plain text
- ap-2263
- author: Chatthong, Boonyarit; Onjun, Thawatchai
- title: STUDY OF L–H TRANSITION AND PEDESTAL WIDTH BASED ON TWO-FIELD BIFURCATION AND FIXED POINT CONCEPTS
- date: 2015-08-31
- words: 5219
- flesch: 66
- summary: [ χneo + χano 1 + α(ν′E)2 ] ∂p ∂x = H(x,t), (1) ∂n ∂t − ∂ ∂x [ Dneo + Dano 1 + α(ν′E)2 ]∂n ∂x = S(x,t), (2) where p is plasma pressure, n is plasma density, χneo and Dneo represent the neoclassical transport coeffi- cients, χano and Dano represent the anomalous trans- port coefficients, ν′E is the flow shear suppression, α is a positive constant representing the strength of the suppression, and H and S are the thermal and particle sources, localized at the center and at the edge of the plasma, respectively. Evidently, the change in parti- cle source has a greater effect on plasma density than on plasma pressure.
- keywords: anomalous; anomalous transport; barrier; bifurcation; case; central; central plasma; central pressure; confinement; constant; critical; density; equations; figure; fixed; flow; flux; fluxes; formation; function; fusion; gradient; heat; lowest; mode; neoclassical; particle; pedestal; pedestal width; phys; physics; plasma; plasma density; plasma pressure; point; pressure; profiles; results; shear; source; stable; state; steady; strength; study; suppression; thermal; threshold; times; transition; transport; value; width
- versions: original; plain text
- ap-2265
- author: Bogachev, Nikolay Nikolaevich; Bogdankevich, Irina L.; Gusein-Zade, Namik G.; Sergeychev, Konstantin F.
- title: OPERATION MODES AND CHARACTERISTICS OF PLASMA DIPOLE ANTENNA
- date: 2015-02-28
- words: 2992
- flesch: 65
- summary: Keywords: plasma antenna, surface electromagnetic wave, numerical simulation, operation modes, metal monopole, radiation pattern. In recent years much plasma antenna research has been done by theoretical, numerical and experimental methods [1–11].
- keywords: antenna; asymmetric; case; characteristics; cm−3; column; curve; density; dipole; dispersion; electromagnetic; experimental; fig; frequency; linear; mad; metal; modes; numerical; operation; parameters; pattern; plasma; plasma antenna; radiation; results; simulation; surface; wave; ωew; ωew0
- versions: original; plain text
- ap-2266
- author: Casas, David; Barriga-Carrasco, Manuel D.; Andreev, Alexander A.; Schnürer, Matthias; Morales, Roberto
- title: PROTON STOPPING POWER OF DIFFERENT DENSITY PROFILE PLASMAS
- date: 2015-04-30
- words: 3079
- flesch: 63
- summary: Keywords: stopping power, laser-accelerated protons, density profile targets, energy loss, bound electrons, free electrons, plasma physics. In this last case, it is important to study energy loss of an ion beam that passes through a plasma target to understand the interactions of swift particles with nuclear fusion fuel pellet.
- keywords: abel; acta; atomic; barriga; beam; calculated; calculation; carrasco; density; dielectric; different; electron; energy; equation; figure; free; function; high; i(r; i(y; interpolation; inversion; ionized; laser; lateral; loss; low; means; methods; physics; plasma; points; polytechnica; power; profile; proton; radial; radius; review; rpa; set; stopping; target; velocity
- versions: original; plain text
- ap-2269
- author: Blaško, Marian; Tittel, Viktor; Náplava, Antonín; Ondruška, Michal
- title: INJECTION MOLDING AND STRUCTURAL ANALYSIS IN METAL TO PLASTIC CONVERSION OF BOLTED FLANGE JOINT BY CAE
- date: 2014-12-31
- words: 1732
- flesch: 58
- summary: Mechanical properties of fiber reinforced parts are strongly in- fluenced by fiber orientation resulting from injection molding process. Injection molding analysis was performed on ac- tual flange model with corresponding feed system and injection molding parameters.
- keywords: analysis; cae; crack; design; fiber; figure; flange; gf30; injection; isotropic; load; material; mechanical; metal; molding; mpa; orientation; pa66; plastic; preliminary; principal; properties; simulation; stress; structural
- versions: original; plain text
- ap-2270
- author: Lahuta, Martin; Pátek, Zdeněk; Szöllös, András
- title: COMPUTATIONAL AERODYNAMIC OPTIMIZATION OF LOW-SPEED WING
- date: 2014-12-31
- words: 4021
- flesch: 54
- summary: Typical geometric constraints that can be used are: wing area, wing span, wing aspect ratio, wing taper ratio, wing twist, wing dihedral, wing swept angle. Airfoil sections It is necessary to create a database of the airfoils used on the wing in advance, because the aerodynamic characteristics of the airfoils used on the wing and their positions along the wingspan are used as inputs for wing optimization.
- keywords: adaptation; aerodynamic; airfoil; algorithms; angle; archive; area; characteristics; coefficient; coello; constraints; criterion; curve; description; design; differential; drag; ea1; elitist; evolutionary; figure; flow; genetic; geometric; individuals; lift; local; low; maximum; method; multi; new; non; objective; operators; optimization; parameter; pareto; point; population; random; range; reinitialization; span; speed; standard; statistics; target; tip; twist; value; vector; wing
- versions: original; plain text
- ap-2272
- author: Vítku, Jaroslav; Nahodil, Pavel
- title: TOWARDS EVOLUTIONARY DESIGN OF COMPLEX SYSTEMS INSPIRED BY NATURE
- date: 2014-10-31
- words: 7878
- flesch: 59
- summary: The figure shows that the framework uses simple communication in the network, while a transformation from/to a symbolic (or other) domain is implemented inside a particular Neural Module (depicted as Modem in the schematics), if needed. Configuration of a Neural Module This type of Neural Module can implement various types of information processing.
- keywords: able; action; agent; algorithm; anns; approach; architecture; artificial; behavior; best; communication; complex; current; data; design; environment; evolutionary; example; experiments; exploration; figure; fitness; following; framework; hand; hybrid; ind1; inputs; knowledge; lambda; learning; means; module; motivation; network; neural; neural module; new; node; order; outputs; parameters; particular; physiological; physiological module; position; prosperity; reinforcement; representation; reward; rga; simulation; soga; source; state; step; sub; systems; task; time; use; utility; value; variable; way
- versions: original; plain text
- ap-2274
- author: Hájková, Pavlína; Tichý, David; Čmelík, Jiří; Antoš, Petr
- title: IMMOBILISATION OF HUMIC SUBSTANCES USING PLASMA MODIFICATION
- date: 2015-04-30
- words: 3098
- flesch: 60
- summary: The column apparatus was filled with PP fabrics. The total area of PP fabrics was 62.8 cm2, and it was dripped by an aqueous solution of cadmium salts with a flow rate of 0.5 ml/min.
- keywords: acids; analysis; aqueous; atmospheric; barrier; cadmium; capacity; cd2; chemical; cm2; column; concentration; content; dbd; dielectric; discharge; electrodes; fabric; group; higher; hss; humate; humic; immobilized; metals; modification; modified; nonwoven; particles; plasma; polypropylene; potassium; pp fabric; pressure; salts; samples; sem; solution; sorption; substances; surface; treatment; vol; water; xps
- versions: original; plain text
- ap-2275
- author: Šulc, Radek; Pešava, Vít; Ditl, Pavel
- title: LOCAL VELOCITY PROFILES MEASURED BY PIV IN AN VESSEL AGITATED BY RUSHTON TURBINE
- date: 2014-12-31
- words: 4623
- flesch: 59
- summary: Keywords: mixing, Rushton turbine, Particle Image Velocimetry, flow, velocity profile, mean velocity, fluctuation velocity. For dimensionless velocities independent of the impeller rotational speed, the tur- bulence intensity should also be independent from the impeller rotational speed.
- keywords: acceptable; agitated; area; axial; calculated; chebyshev; components; dimensionless; direction; effect; figure; flow; fluctuation; fluctuation velocity; form; fořt; hypothesis; impeller; independent; intensity; investigated; local; mean; mean velocity; measured; parameter; polynomials; profile; radial; range; region; rotational; rushton; speed; time; turbine; turbulence; values; velocities; velocity; velocity profiles; vessel; vol; |t|
- versions: original; plain text
- ap-2277
- author: Maturkanič, Dušan
- title: EFFECT OF THE FLOW FIELD DEFORMATION IN THE WIND TUNNEL ON THE AERODYNAMIC COEFFICIENTS
- date: 2015-06-30
- words: 6692
- flesch: 61
- summary: Asymmetry of the speed profile The specific speed V SYM indicates the size of the cor- responding difference between the local speeds and defined flow field speed in the wind tunnel. However, the same value of this specific speed could represent various kinds of flow field non-uniformities.
- keywords: aerodynamic; air flow; asymmetry; axis; case; character; coefficients; considered; differences; direction; disproportion; effect; field deformation; field non; field rotation; fig; figure; flow field; flow speed; intensity; kinds; local; local speed; measured; measurements; model; non; normal speed; parameter; plane; profiles; radial speed; range; relation; rotary flow; rotation; sectors; specific speed; speed; speed component; speed difference; speed disproportion; speed profile; speed v; tangential speed; uniformity; value; vortex field; vortex flow; vortices; wind tunnel
- versions: original; plain text
- ap-228
- author: Safan, M.; Kohoutková, A.
- title: Influence of Different Drying Conditions on High Strength Concrete Compressive Strength
- date: 2001-01-03
- words: 3592
- flesch: 56
- summary: In the current research, crushed dolomite was used in two high strength concrete mixes with 0.0 and 10 percent silica fume addition to evaluate the influence of five different drying conditions on high strength concrete compressive strength evaluated at 3, 7, 28 days. High strength concrete offers greater compressive strength per unit cost, weight, and volume associated with improved mechanical properties such as modulus of elasticity and ten- sile strength.
- keywords: addition; adobe; age; ages; aggregate; astm; c33; case; cement; compressive; concrete; conditions; content; crushed; cubes; curing; czech; days; development; different; false; fig; fume; high; hsc; hydration; mix; mixes; mixing; process; publishing; ratios; sand; silica; size; specimens; strength; technical; temperature; true; university; vol; water
- versions: original; plain text
- ap-2289
- author: Stuchlík, Zdenek; Urbanec, Martin; Kotrlová, Andrea; Török, Gabriel; Goluchová, Katerina
- title: RESONANT SWITCH MODEL OF HF QPOS AND EQUATIONS OF STATE OF NEUTRON STARS AND QUARK STARS
- date: 2014-10-31
- words: 3222
- flesch: 70
- summary: Neutron star models are constructed under the Hartle–Thorne theory of slowly rotating neutron stars calculated using the observationally given rotational frequency frot Resonant switch model The RS model
- keywords: arxiv; astro; atoll; best; data; eos; fit; fitting; frequencies; frequency; mass; model; neutron; neutron star; oscillations; oscillatory; parameters; point; precision; qpos; relations; resonant; rp1; rs model; source; spin; star; state; switch; twin
- versions: original; plain text
- ap-2297
- author: Stodůlka, Jiří; Šafařík, Pavel
- title: ANALYSIS OF TRANSONIC FLOW PAST CUSPED AIRFOILS
- date: 2015-06-30
- words: 3221
- flesch: 65
- summary: Keywords: oblique shock; shock polar; trailing edge; cusped airfoil; transonic flow; CFD. Introduction To this day, transonic flow has represented a very chal- lenging topic.
- keywords: airfoil; analysis; angle; azimuthal; behavior; case; chord; classical; cusped; design; dynamics; edge; fig; figure; flow; gas; lower; mach; methods; numerical; oblique; parameters; pressure; profile; ratio; results; sharp; shock; solution; supersonic; theory; trailing; transonic; value; wave
- versions: original; plain text
- ap-230
- author: Haghi, A. K.
- title: Investigation into Airborne Dust ina Wool Textile Mill
- date: 2001-01-03
- words: 2720
- flesch: 56
- summary: Microscope magnification is a critical parameter which enables the detection of dust particles and distinguishes them from filter surface features. The aim of this work is to deepen the understanding of the factors relevant to this problem by conducting a survey of the nature of airborne wool dust in an industrial environment.
- keywords: acta; airborne; collection; counts; czech; dust; electron; fields; filter; fraction; health; house; http://ctn.cvut.cz/ap/; inorganic; length; mass; materials; membrane; particles; polytechnica; present; processing; publishing; respiratory; samples; sampling; section; size; surface; table; technical; total; university; vol; wool
- versions: original; plain text
- ap-2307
- author: Mego, Michal; Kocifaj, Miroslav; Kundracik, František
- title: A SYSTEM AND A DEVICE FOR ISOLATING CIRCULATING TUMOR CELLS FROM THE PERIPHERAL BLOOD IN VIVO
- date: 2015-08-31
- words: 2984
- flesch: 54
- summary: Magnetic nanoparticles The system with magnetic nanoparticles covered by monoclonal antibodies against a common epithelial antigen (EpCAM) is used to isolate circulating tumor cells from the peripheral blood. The proposed system consists of magnetic nanoparticles covered by monoclonal antibodies against a common epithelial antigen, large supermagnets, which are used to control the position of the nanoparticles within the human body, and a special wire made of a magnetic core wrapped in a non-magnetic shell.
- keywords: acta; antibody; applications; blood; cancer; cannula; cells; clin; core; ctcs; detection; epcam; epithelial; field; figure; force; hematopoietic; isolated; isolation; large; limited; magnetic; magnets; metastatic; methods; nanoparticles; non; patients; pellets; peripheral; peripheral blood; polytechnica; research; slovak; small; special; system; tumor; tumor cells; vein; venous; vivo; volume; wire
- versions: original; plain text
- ap-232
- author: Ismail, Ashraf Fouad Hafez
- title: Evolved Representation and Computational Creativity
- date: 2001-01-03
- words: 8988
- flesch: 56
- summary: Keywords: computational creativity, evolved representation, design processes, evolutionary algorithms, search space. 41 No. 3/2001 Exploration (E) Transformation (T) creative zone non-creative zone transition zone mundane (m) mundane (m) novel (n) novel (n) original (o) original (o) Fig. 8: Framework to classify design processes in terms of exploration and transformation (from [14]) tion’ would therefore be ‘mundane’.
- keywords: 3/2001; acta; artificial; basic; basic genes; basic representation; certain; combination; computational; creation; creative; creativity; czech; design; design process; different; eds; evolutionary; evolved; evolved representation; example; features; figure; fitness; focus; genes; genotype; gero; house; http://ctn.cvut.cz/ap/; human; individuals; influence; knowledge; length; level; likely; limited; meta; method; new; number; original; phenotype; polytechnica; population; possible; process; processes; program; publishing; representation; search; search space; set; shape; space; symbols; system; technical; transformation; university; use; user; way
- versions: original; plain text
- ap-2321
- author: Šafarík, Pavel; Nový, Adam; Jícha, David; Hajšman, Miroslav
- title: ON THE SPEED OF SOUND IN STEAM
- date: 2015-12-31
- words: 3020
- flesch: 66
- summary: The results for wet steam are very close (lower than 2 % difference) to the values for the speed of sound in wet steam, derived according to (1), see Fig. 3, where a detail of the h–s (enthalpy– entropy) diagram for water and steam is depicted. The speed of sound in steam solved by means of the model for solving the thermodynamic parameters of steam downstream from a normal shock wave 3.1 Results of the solution for the speed of sound 4 The speed of sound in wet steam in the metastable region 4.1 Equilibrium speed of sound 4.2 Frozen speed of sound 4.3 Metastable speed of sound 5 Conclusions List of symbols Acknowledgements References
- keywords: balance; calculated; constant; data; downstream; dryness; enthalpy; equilibrium; gas; iapws; line; metastable; model; normal; parameters; phase; pressure; region; shock; sound; specific; speed; state; steam; temperature; thermodynamic; values; water; wave; wet; wet steam
- versions: original; plain text
- ap-2326
- author: Durcansky, Peter
- title: COMPARISON OF MATHEMATICAL MODELS FOR HEAT EXCHANGERS OF UNCONVENTIONAL CHP UNITS
- date: 2015-08-31
- words: 3455
- flesch: 62
- summary: The most fre- quently investigated feature of heat exchangers is the heat exchange surface, from which all the other pa- rameters of the exchanger are derived. The regenerator (R) functions as a heater or cooler and enables energy storage, while in the Ericsson engine the cooler and heater are separate heat exchangers and he efficiency of the machine is not as significantly affected by the volume of the regenerator as in the case of the Stirling engine.
- keywords: account; acta; air; air engine; biomass; bundle; calculation; combustion; compressor; cross; design; elements; energy; engine; ericsson; exchanger; figure; flow; gas; gases; heat; heat exchanger; heat transfer; hot; inlet; internal; mathematical; medium; mesh; methods; model; number; numerical; nusselt; polytechnica; regenerator; section; simulation; stirling; temperature; transfer; tubes; use; volume
- versions: original; plain text
- ap-2328
- author: Sovják, Radoslav
- title: AN EXPERIMENTAL INVESTIGATION INTO MOISTURE-INDUCED EXPANSION OF PLASTERS
- date: 2015-06-30
- words: 2332
- flesch: 58
- summary: Contactless measurement is introduced and a coefficient of moisture expansion for different building plasters is established. A higher coefficient of moisture expansion generally means higher stress and higher demand on the me- chanical properties [8].
- keywords: acta; coefficient; content; engineering; expansion; experimental; figure; hygric; laser; materials; maximum; measuring; moisture; old; plaster; polytechnica; prague; range; reference; relative; samples; sensor; strain; study; tab; temperature; university; water; year
- versions: original; plain text
- ap-234
- author: Bokr, J.; Jáneš, V.
- title: A Logic Object and its State
- date: 2001-01-03
- words: 5940
- flesch: 64
- summary: Hence, the finite automaton model of a static logical object (which automatically performs virtual state transitions from q to q) is the ordered triad � � �X Y Z U R � , , where R is the Mealy output function: i) � � � � � � � � � � � �R: X Y U x y u� : , � for � 0, ii) � � � � � � � � � � � � � � � �R: X Y Z U x y z u� � : , , � for � 1. S U S : s u s� � � � � � �� 1 1, � for � 0 ii) � � � � � � � �� � � � � � � � �:S U Z S s u z s� � 1 1: , , � for � 1 and the injective Moore output function � � � � � � � �:: :S Y s y � , when � � N0, � � N (A is a set of natural numbers denoting moments, N0 = N � {0}).
- keywords: automaton; canonical; control; czech; d �; decomposition; division; dynamic; entity; false; finite; function; j �; k s; logic; logical; model; n �; object; pseudoobject; relation; s e; s s; s x; s y; s z; spec; sr �; state; static; substitute; table; train; transition; true; x k; x y; y �; � /01; � /10; � fig; � proj; � s; � x; � �
- versions: original; plain text
- ap-236
- author: Elsayed, Ashraf El-Shahat; Grünwald, A.; Synáčková, M.; Slavíček, M.
- title: Modelling of Highway Runoff Quantity and Quality
- date: 2001-01-03
- words: 4516
- flesch: 57
- summary: Data verification Due to the shortage of measured data and the necessity to study some important concepts such as runoff peak flow, pol- lutant accumulation and first flush phenomena, simulated data were used for studying these concepts. Keywords: Stormwater Management Model, highway runoff, quantity, quality, first flush.
- keywords: 3/2001; acta; adobe; bod5; buildup; concentration; constituents; contaminations; czech; data; dry; duration; event; false; fig; flow; flush; highway; house; http://ctn.cvut.cz/ap/; intensity; management; measured; model; module; n =; peak; pollutant; polytechnica; prague; process; publishing; quality; quantity; rainfall; rate; results; runoff; simulated; simulation; solids; stormwater; study; subcatchment; surface; suspended; swmm; system; technical; time; total; transport; true; tss; units; university; volume; washoff
- versions: original; plain text
- ap-238
- author: Kaiser, J.; Košťál, E.
- title: Colorimetry and TV Colour Splitting Systems
- date: 2001-01-03
- words: 3499
- flesch: 56
- summary: The existence of negative parts of the colour matching functions � � � � � �r g b� � �, , causes complications by optical separation of partial pictures R, G, B in the classic scanning system. The summing curve of colour matching functions � �x � , � �y � , � �z � and � �r � , � �g � , � �b � is shown in Fig.
- keywords: adobe; air; b �; camera; channels; colorimetric; colour; components; czech; device; display; false; fig; filters; functions; ideal; image; light; matching; optical; partial; positive; prism; reflectances; reflections; reproduction; rgb; scanning; second; sensitivities; spectral; splitting; system; technical; true; university; vol; wavelenght; xyz; z �; � ay; � g; � y; � �
- versions: original; plain text
- ap-240
- author: Safan, M.; Kohoutková, A.
- title: Experiments with Externally Prestressed Continuous Composite Girders
- date: 2001-01-03
- words: 5835
- flesch: 57
- summary: [8]. 3 Research significance The literature addressing prestressing of composite beams showed that more attention has been devoted to the study of internally prestressed continuous beams, while those prestressed by external continuous tendons have received less attention, specially as regards experimental testing. A finite element method for the study of creep and shrinkage effects in composite beams with deformable shear connection.
- keywords: acta; adobe; beam; beam b; capacity; carrying; characteristics; composite; composite beam; concrete; construction; continuous; cracking; cracks; czech; deflection; deviated; diameter; different; experimental; extension; external; false; fig; flange; force; girders; higher; house; http://ctn.cvut.cz/ap/; inner; length; load; loading; means; non; number; percent; performance; polytechnica; prestressed; prestressed beam; prestressing; publishing; response; section; serviceability; slab; span; stages; steel; steel beam; strength; structure; support; technical; tendon; terms; testing; time; true; ultimate; university; value; vol; width; yield
- versions: original; plain text
- ap-242
- author: Munro, C.; Krus, P.
- title: Rapid Prediction of Configuration Aerodynamics in the ConceptualDesign Phase
- date: 2001-01-04
- words: 3073
- flesch: 45
- summary: Advances in flight control certainly allow for a wide variation in vehicle design that would not otherwise be possible. Further- more, the subscale model can be built early in the design pro- cess (perhaps late in the conceptual phase) whereas the fullscale demonstrator can only be tested after design work is essentially complete.
- keywords: aerodynamic; aircraft; analysis; computational; conceptual; configurations; control; cost; data; design; dynamics; early; elements; empirical; experimental; fig; flight; flow; high; initial; level; low; methods; modelling; models; novel; number; operational; performance; prediction; process; requirements; results; risk; significant; simulation; stage; subscale; team; testing; time; tools; tunnel; ucavs; validation; vehicle; vol; water; wind; work
- versions: original; plain text
- ap-244
- author: Holický, M.
- title: Prospects for Advanced Engineering Design Based on Risk Assessment
- date: 2001-01-04
- words: 3856
- flesch: 53
- summary: i ij � � , P P . Note, however, that this value is valid for the fire start probability pfi, s = P(H2)
- keywords: analysis; assessment; assumed; basic; bayesian; c17(12; chance; conditional; considered; cost; design; events; example; failure; figure; fire; flashover; holický; network; node; parent; pfi; probabilistic; probabilities; probability; protection; related; risk; schleich; situation; state; structural; system; table; total; traditional; uncertainties; utility; variables
- versions: original; plain text
- ap-2445
- author: Šoltés, Martin; Červenka, Milan
- title: ELECTRODYNAMIC LOUDSPEAKER-DRIVEN ACOUSTIC COMPRESSOR
- date: 2015-10-31
- words: 3606
- flesch: 59
- summary: Acoustic pressure amplitudes that they obtained were more than an order of magnitude larger than it had been possible before. Optimal shaping of acoustic resonators for the generation of high-amplitude standing waves.
- keywords: acoustic; acoustic compressor; acoustic pressure; air; air flow; amplitude; cavity; characteristic; clamp; compressor; delivery; delivery valve; different; displacement; driver; experimental; figure; flow; frequency; high; hose; housing; input; jasa; loudspeaker; maximum; measured; node; port; possible; pressure; pressure amplitude; rate; reed; resonance; resonator; shape; standing; static; static pressure; valve; voltage; volume; wall; wave
- versions: original; plain text
- ap-2449
- author: Attia, Abdel-Fattah A.
- title: INTELLIGENT CONTROLLER FOR TRACKING A 14-INCH CELESTRON TELESCOPE
- date: 2018-10-31
- words: 3838
- flesch: 64
- summary: “Modified PSO for optimal tuning of fuzzy PID controller.” The whole system operation is defined based on traditional fuzzy con- trollers (SFLCs) and PSO parameters in Table 4. (2.)
- keywords: abdel; acceleration; acta; adaptive; algorithm; attia; axis; best; celestron; classical; controllers; dec; error; fattah; figure; flc; functions; fuzzy; improved; input; logic; membership; mfs; model; mpso; optimization; output; parameters; particle; performance; pid; polytechnica; position; pso; pso controllers; response; results; rules; sec; section; sets; sflc; swarm; system; table; telescope; time; tracking; tuning; value; variables; velocity
- versions: original; plain text
- ap-2459
- author: Kracík, Petr; Pospíšil, Jiří
- title: EFFECT OF TUBE PITCH ON HEAR TRANSFER IN SPRINKLED TUBE BUNDLE
- date: 2015-10-31
- words: 3880
- flesch: 74
- summary: Keywords: sprinkled; tube bundle; heat transfer; tube pitch. Beside the above mentioned falling film liquid flow rate (tested [5] for ex- ample) they are for instance tube diameters (tested [6] for example), tube pitches in a bundle (tested [7] for example) or a physical condition of a falling film liquid and heat transfer (tested [8–10] for example).
- keywords: approx; bundle; coefficient; exchanger; figure; film; film liquid; flow; flow rate; gap; gradient; heat; heat transfer; increase; liquid; litres; measured; minute; mode; pitch; pitches; rate; results; sprinkled; surface; temperature; tested; thermal; transfer; transfer coefficient; tube; tube bundle; value; vol; water
- versions: original; plain text
- ap-246
- author: Alfaro-Cid, E.; McGookin, E. W.; Murray-Smith, D. J.
- title: Genetic Algorithm Optimisation of a Ship Navigation System
- date: 2001-01-04
- words: 4737
- flesch: 54
- summary: i i tot � � � � � �� � � � �2 1 3 2 2 2 1 2 0 . The new cost is calculated as [7]: � � � � � � � �Cost Pos SP SP Pos Nchrom � � � � �2 2 1 1 1 .
- keywords: actual; axis; chromosome; controller; cost; error; force; function; gain; genetic; good; heading; input; model; navigation; new; number; optimisation; order; parameters; performance; pid; population; possible; process; propulsion; response; results; selection; ship; signal; simulations; solutions; study; surge; table; thrust; time; tracking; tuning; university; values; velocity; vessel; � �
- versions: original; plain text
- ap-2460
- author: Zemčík, Oskar; Sedlák, Josef; Chladil, Josef
- title: CHANGES IN THE SURFACE LAYER OF ROLLED BEARING STEEL
- date: 2015-10-31
- words: 2158
- flesch: 64
- summary: This paper describes changes observed in bearing steel due to roller burnishing. Hydrostatic roller burnishing was selected as the most suitable method for performing roller burnishing on hardened bearing steel.
- keywords: acta; austenite; bearing; burnishing; changes; deformation; depth; element; figure; finite; force; hydrostatic; layer; material; method; plastic; polytechnica; residual; roller; roughness; significant; simulation; steel; stress; surface; surface layer; tool; values; vol; workpiece
- versions: original; plain text
- ap-2461
- author: Jílková, Lenka; Ciahotný, Karel; Kusý, Jaroslav
- title: PYROLYSIS OF BROWN COAL USING A CATALYST BASED ON W–Ni
- date: 2015-10-31
- words: 2614
- flesch: 61
- summary: Pyrolysis of Brown Coal Using a Catalyst Based on W–Ni Fig. 5: Content of compounds (selected by functional groups) in organic parts of pyrolysis condensates 0 5 10 15 20 25 30 35 40 45 pyrolysis of brown coal pyrolysis of brown coal + alum. pyrolysis of brown coal + alum. 2: Content of phenol, 1,2-benzenediol and acetic acid in water parts of pyrolysis condensates 0 5 10 15 20 25 30 35 40 pyrolysis of brown coal pyrolysis of brown coal + alum. pyrolysis of brown coal + alum.
- keywords: alumina; brown; brown coal; carbon; catalyst; coal; composition; compounds; condensates; content; fig; gas; gases; groups; hydrogen; liquid; mass; organic; parts; phenol; products; properties; pyrolysis; sample; temperature; water
- versions: original; plain text
- ap-2463
- author: Havlík, Jan; Dlouhý, Tomáš
- title: CONDENSATION OF WATER VAPOR IN A VERTICAL TUBE CONDENSER
- date: 2015-10-31
- words: 3995
- flesch: 62
- summary: Experimental set-up Experiments for testing and for validating these meth- ods for HTC calculations are carried out on a vertical shell-and-tube heat exchanger, in which the condens- ing water vapor flows downwards in vertical tubes and the cooling water countercurrent flows in the shell part. Condensation in vertical tubes (2.)
- keywords: analysis; bell; calculation; condensate; condensation; condensation htc; condenser; delaware; diameter; experimental; fig; film; flow; gas; heat; htc; impact; method; model; number; nusselt; overall; overall htc; process; results; reynolds; shell; steam; temperature; theoretical; theory; transfer; tube; value; vapor; velocity; vertical; vertical tube; water
- versions: original; plain text
- ap-248
- author: Pohl, J.; Warell, A.; Krus, P.; Palmberg, J.-O.
- title: Conceptual Design of a Hydraulic Valve Train System
- date: 2001-01-04
- words: 5116
- flesch: 57
- summary: The advantage with this type of valve train system is that the hydraulic piston remains due to the check-valve in the ex- tend position irrespective of the solenoid valves state. Thus solenoid valves closing characteris- tic is not critical a critical parameter.
- keywords: 5/2001; accelerate; acta; actuation; approach; cam; check; closing; component; concept; conceptual; consumption; design; downwards; dynamic; energy; engine; experiments; figure; flow; flumes; function; high; hydraulic; lift; main; means; model; non; objective; oil; opening; optimisation; order; overall; phaser; piston; polytechnica; pressure; process; product; return; set; simulated; simulation; solenoid; specification; spring; stage; stroke; system; technical; test; time; train; train system; tree; university; valve; valve train; variable; variable valve; vol
- versions: original; plain text
- ap-2495
- author: Skočilas, Jan; Palaziuk, Ievgen
- title: CFD SIMULATION OF THE HEAT TRANSFER PROCESS IN A CHEVRON PLATE HEAT EXCHANGER USING THE SST TURBULENCE MODEL
- date: 2015-08-31
- words: 4816
- flesch: 57
- summary: A simulation allows us to clearly demonstrate that the phenomenon of non-uniform distribution of the fluid is a major factor affecting the performance of plate heat exchangers, which can be weakened by rolling guide area in the corrugated board [8]. [10] Freund S., Kabelac S.: Investigation of local heat transfer coefficients in plate heat exchangers with temperature oscillation IR thermography and CFD.
- keywords: acta; analytical; angle; ansys; calculation; cases; cfd; channels; characteristics; chevron; coefficient; considered; coolant; corrugation; design; different; distribution; drop; engineering; exchanger; experimental; exponents; figure; flow; fluid; geometry; heat; heat exchanger; heat transfer; higher; hydraulic; inclination; increase; issn; journal; main; mass; model; number; numerical; parameters; performance; plate; plate heat; presence; pressure; pressure drop; process; resistance; results; reynolds; simulation; surface; temperature; transfer; transfer coefficient; turbulence; values
- versions: original; plain text
- ap-250
- author: Kolman, D.
- title: Analysis of a Thermal Plasma Diamond CVD System
- date: 2001-01-04
- words: 2403
- flesch: 49
- summary: The focus of this paper is on the second stage – the interaction of the plasma flow (plasma jet) with the surround- ing atmosphere and with the substrate located downstream. In our case, the torch orifice diameter = 6 mm, plasma velocity 30 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 41
- keywords: analysis; axial; boundary; chemical; conditions; consideration; czech; data; deposition; diamond; enthalpy; equations; exit; experimental; flow; gas; jet; measurements; model; modeling; nozzle; paper; plasma; pressure; reactor; results; species; substrate; surface; system; technical; temperature; theoretical; thermal; torch; turbulent; university; velocity
- versions: original; plain text
- ap-252
- author: Chlupová, A.; Heger, J.; Vašek, A.
- title: Fatigue Crack Initiation and Early Growth in GLARE 3 Fiber-metal Laminate Subjected to Mixed Tensile and Bending Loading
- date: 2001-01-04
- words: 2710
- flesch: 59
- summary: The number of cycles necessary for fatigue crack initiation in metal layers of the laminate was determined by the local plastic strain at the notch edge in the individual layers. In this study, attention is paid to the effect of mixed tension and bending loading on fatigue crack initiation and early growth in an open-hole sheet specimen.
- keywords: bending; crack; crack growth; cycles; czech; effect; element; experimental; fatigue; fibers; figure; finite; glare; growth; hole; initiation; inner; laminate; layer; length; loading; local; max; metal; mpa; notch; number; rate; sheet; specimen; strain; stress; surface; tension
- versions: original; plain text
- ap-2536
- author: Hádková, Kristýna; Tekáč, Viktor; Ciahotný, Karel; Beňo, Zdeněk; Vrbová, Veronika
- title: TREATMENT OF NATURAL GAS BY ADSORPTION OF CO2
- date: 2015-12-31
- words: 3561
- flesch: 63
- summary: Apart from burning, one of the possible uses of natural gas is as a fuel for motor vehicles. There are two types of fuel from natural gas — CNG (Compressed Natural Gas) or LNG (Liquefied Natural Gas).
- keywords: 13x; adsorbent; adsorber; apparatus; atmospheric; atmospheric pressure; c46; capacity; carbon; case; co2; depressurization; desorption; evacuation; gas; inlet; lng; mixture; molecular; molecular sieve; mpa; natural; natural gas; nitrogen; pressure; sieve; surface; tested; thermal; valves; volume
- versions: original; plain text
- ap-254
- author: Macek, J.; Takáts, M.
- title: Involvement of Thermodynamic Cycle Analysis in a Concurrent Approach to Reciprocating Engine Design
- date: 2001-01-04
- words: 6123
- flesch: 58
- summary: i i N CH j j � � � � � � � � , , , ; � � � � � � � � � �m t C m t CH j j d d d r*s r � � . i i N i i j j � � � � � � � � � � � � � � d d , , , , � � � � �� �i j i j j jA w m t , , .
- keywords: 5/2001; acta; algorithms; analysis; approach; case; changes; closures; combustion; compression; configuration; conservation; constant; cycle; czech; described; design; diagram; efficiency; energy; engine; enthalpy; entropy; equation; experiments; fig; finite; flow; flux; gas; general; heat; high; house; http://ctn.cvut.cz/ap/; j j; k j; k t; macek; mass; matrix; methods; model; new; optimisation; p t; polytechnica; pressure; procedure; publishing; reaction; real; set; specific; state; structure; suitable; system; t j; t t; technical; temperature; terms; thermodynamic; university; volume; volumetric; yields; � h; � j
- versions: original; plain text
- ap-256
- author: Murray-Smith, D. J.
- title: The Validation of Computer-based Models in Engineering: Some Lessons from Computing Science
- date: 2001-01-04
- words: 3356
- flesch: 40
- summary: No. 4 – 5/2001 45 The Validation of Computer-based Models in Engineering: Some Lessons from Computing Science D. J. Murray-Smith Questions of the quality of computer-based models and the formal processes of model testing, involving internal verification and external validation, are usually given only passing attention in engineering reports and in technical publications. For example version control techniques are routinely used in software development but are seldom applied in a rigorous fashion for simulation model development, maintaining the model throughout its life cycle
- keywords: acta; analysis; application; appropriate; computer; control; cycle; design; development; documentation; emphasis; engineering; errors; experimental; external; flight; frame; important; linear; mathematical; methods; model; modelling; murray; performance; polytechnica; process; processes; quality; real; simulation; smith; software; system; systematic; techniques; testing; theory; tools; validation; verification; vol
- versions: original; plain text
- ap-2575
- author: Beniak, Juraj; Križan, Peter; Matúš, Miloš
- title: A COMPARISON OF THE TENSILE STRENGTH OF PLASTIC PARTS PRODUCED BY A FUSED DEPOSITION MODELING DEVICE
- date: 2015-12-31
- words: 4802
- flesch: 60
- summary: This again points to the brittleness of the model produced from ABS plastic material using FDM technology. The aim of this paper is to show the tensile strength value for parts produced from different materials on the Fused Deposition Modeling device when the horizontal orientation of the specimens is changed.
- keywords: abs; change; conventional; degree orientation; degrees; degrees fig; devices; different; different layers; direction; elongation; fdm; fibers; fig; horizontal; layers; manufacturing; material; measured; model; orientation; parts; pla; plane; plastic; properties; prototyping; rapid; samples; software; specimen; strength; strength values; structure; table; technology; tensile; tensile strength; test; values
- versions: original; plain text
- ap-2578
- author: Hanakova, Lenka; Socha, Vladimir; Schlenker, Jakub; Cakrt, Ondrej; Kutilek, Patrik
- title: ASSESSMENT OF POSTURAL INSTABILITY IN PATIENTS WITH A NEUROLOGICAL DISORDER USING A TRI-AXIAL ACCELEROMETER
- date: 2015-08-31
- words: 5511
- flesch: 58
- summary: This method is used for diagnosing cerebellar disease manifested by tremors or by swaying, since it is primarily designed for use in neurology to dis- cover relationships between neurological disorders and postural trunk movements in 3-D space. 233 L. Hanakova, V. Socha, J. Schlenker et al. Acta Polytechnica 5.
- keywords: //dx.doi.org/10.1016; accelerations; accelerometer; acta; age; analysis; angles; anterior; assessment; axial; balance; body; cerebellar; clinical; closed; confidence; control; czech; data; differences; disease; disorders; doi:10.1016; ellipsoid; engineering; et al; eyes; fig; fis; fos; healthy; http; imu; matrix; measured; measurements; median; method; movements; mtx; neurological; patients; points; polytechnica; posterior; postural; posture; prague; pts; quiet; rehabilitation; results; set; stability; stance; standing; statistical; study; subjects; surface; sway; system; test; tri; trunk; unit; university; use; variables; ves; vestibular; volume
- versions: original; plain text
- ap-258
- author: Vyhlídal, T.; Zítek, P.
- title: Control System Design Based on a Universal First Order Model with Time Delays
- date: 2001-01-04
- words: 3893
- flesch: 67
- summary: Simplifying (7) the following expressions are obtained � �� � � � � � � � arccos cosKku u u (8) � � � � � � T u u u u � �sin tan cos� � � � � � � . If model (5) is used, the analogous controller results � � � � � �� � �� � C s Ts s K Ps s Fs s � � � � � � � � exp exp exp � � �1 .
- keywords: angle; complex; control; controller; couple; delay; dominant; dynamics; equation; exp; feedback; figure; frequency; gain; higher; imc; input; loop; means; method; model; order; parameters; plane; point; poles; position; real; response; set; state; step; system; time; value; zeros
- versions: original; plain text
- ap-260
- author: Vacek, J.
- title: Stress Distribution in a Coal Seam before and after Bump Initiation
- date: 2001-01-04
- words: 2330
- flesch: 69
- summary: We observed the mechanism and the history of coal bumps. 5 Conclusion A combination of experimental and mathematical models appears very appropriate for a study of the stress distribu- tion in a coal seam before and after bump initiation.
- keywords: 5/2001; acta; araldite; bump; cell; coal; cycles; czech; distribution; experimental; fig; force; initiation; loading; meters; model; particles; photo; polytechnica; rock; seam; stress; technical; tum; tum tum; university; vacek; vol
- versions: original; plain text
- ap-262
- author: Menzies, R.
- title: Computational Investigation of Flows in Diffusing S-shaped Intakes
- date: 2001-01-04
- words: 3893
- flesch: 59
- summary: A feature of s-duct intake flow is the genera- tion of secondary flow off the first bend as described in the introduction. One of the main problems of turbulence closures in intake flows is the transition of the freestream from laminar to turbulent over the intake cowl region.
- keywords: 5/2001; acceleration; acta; aircraft; bend; calculations; case; complex; computational; cowl; data; duct; engine; engine face; euler; experiment; face; fig; figure; flow; flow case; fluid; freestream; grid; high; intake; mass; mass flow; model; plane; polytechnica; port; prediction; pressure; previous; problems; rans; region; results; secondary; secondary flow; sst; starboard; time; turbulence; university; vol
- versions: original; plain text
- ap-264
- author: Strohmayer, A.
- title: Improving Aircraft Design Robustness with Scenario Methods
- date: 2001-01-04
- words: 4045
- flesch: 47
- summary: As shown in Figure 2, there are essentially three fundamental aspects of scenario implementation in aircraft design: definition of market requirements, design evaluation, and identification of the level of technology to implement in the new design. Keywords: aircraft design, scenario methods, requirements, design evaluation, technology strategy. quantified, environmental regulations concerning noise and emissions as well as airport compatibility requirements have to be met, and airworthiness, i.e. controllability and integrity within the whole flight envelope has to be assured.
- keywords: 5/2001; acta; aircraft; aircraft design; analysis; aspects; baseline; characteristics; concept; configuration; criteria; customer; czech; definition; design; development; different; economic; environment; evaluation; example; factor; figure; future; house; http://ctn.cvut.cz/ap/; long; manufacturer; market; methods; needs; new; order; phase; polytechnica; process; product; project; publishing; relevant; requirements; results; robust; robustness; scenario; selection; set; situation; specific; standards; strategy; technical; technology; transport; university; vol
- versions: original; plain text
- ap-266
- author: Marková, J.; Holický, M.
- title: Credibility of Design Procedures
- date: 2001-01-04
- words: 4069
- flesch: 49
- summary: If for example the reliability of a structural element stems from a comparison between action effects E and resistance R, then the probability of structural failure can be expressed as � � � � �P P E R FE R R E f d� � � � � � � � � 0 (6) where �E() is the density function of variable E, FR() is the dis- tribution function of variable R, and � denotes a generic point of E and R. 4 Credibility The probability that the random process � �� �w tX J, exceeds in time t the calculated value of crack width w(xk, t) determined in accordance with the relevant standards is expressed as � � � �� �� P w t w , twc kP� � �x X J, � 0 (11) where J(t) is the rectangular wave renewal vector process, represented here by the short-term and long-term compo- nents of the imposed load.
- keywords: aci; analysis; basic; calculated; cases; concrete; crack; crack width; cracking; credibility; czech; design; factors; fig; function; index; limit; load; models; probability; reinforcement; reliability; respect; selected; serviceability; slab; standards; states; structural; theoretical; time; ultimate; values; variables; vector; verification; vol; width; čsn
- versions: original; plain text
- ap-268
- author: Friedl, J.
- title: Aerodynamic Design of a Tailless Aeroplan
- date: 2001-01-04
- words: 2659
- flesch: 70
- summary: 5: Computed variation of CLmax with increasing Re number Re �0 CL� CLmax �w �0 CL� �CL� [deg]
- keywords: acta; aerodynamic; aeroplane; airfoil; analysis; angle; cases; characteristics; coefficient; curve; czech; data; deg; design; fig; geometry; lift; method; moment; n60r150; panel; polytechnica; span; speed; table; tip; twist; university; vol; wing; wzk
- versions: original; plain text
- ap-270
- author: Vukazich, S.; Marek, P.
- title: Structural Design Using Simulation Based Reliability Assessment
- date: 2001-01-04
- words: 4744
- flesch: 57
- summary: The load effect combination at the critical section of the beam can be expressed as: S q L F L F L� � �var var var 2 1 28 4 3 . In this manner, the deformation of the tank can be expressed as: � � � � � �u x t x Z t, � � .
- keywords: acceleration; acta; analysis; assessment; bar; beam; czech; design; effects; engineering; equivalent; example; factors; failure; fig; function; histogram; house; http://ctn.cvut.cz/ap/; level; load; marek; mass; maximum; output; polytechnica; pressure; probability; properties; publishing; quantities; reliability; resistance; response; safety; sbra; section; serviceability; simulation; star; steel; structure; tank; truss; university; values; variable; vol; wall; water
- versions: original; plain text
- ap-272
- author: Schieck, F.; Schmitt, D.
- title: Cargo Aircraft Conceptual Design Optimisation Using a Flexible Computer-Based Scaling Approach
- date: 2001-01-04
- words: 4437
- flesch: 46
- summary: Keywords: aircraft conceptual design, aircraft scaling, mass growth factor, aircraft multidisciplinary design optimisation. Relying on this data, important trade-off decision-making processes during aircraft conceptual design are enabled and backed up with extended knowledge about the evolving aircraft.
- keywords: acta; aircraft; algorithm; approach; area; baseline; cargo; certain; change; climb; computer; conceptual; current; design; detail; drag; early; example; fastr; figure; flexible; fuel; http://ctn.cvut.cz/ap/; knowledge; lift; mass; merit; methods; minimum; mission; model; module; operational; optimisation; overall; parameter; performance; phase; point; polytechnica; process; project; range; rate; required; requirements; results; run; scaling; section; set; solution; system; table; technical; total; university; variables; vol; wing
- versions: original; plain text
- ap-274
- author: Rieger, F.
- title: Power Characteristics of a Screw Agitator in a Tube
- date: 2001-01-06
- words: 1679
- flesch: 58
- summary: Keywords: power, power characteristic, screw agitator, pump. agitator power characteristic agitator pumping characteristic hydraulic characteristic of agitating system P Q e Fig.1: Estimation of power consumption from operating characteristics (creeping flow region) 0 200 400 600 800 1000 1200 0 500 1000 1500 2000 2500 �e* P * 48.7–54.2 152–155.8 199.1–202 358.4–363.5 514.5–517.7 1.9–11.1 Re Fig. 2: Power characteristics at different Reynolds number values presented in [3].
- keywords: agitator; characteristics; czech; dimensionless; energy; fig; flow; number; power; pumping; region; reynolds; rieger; screw; specific; tube; values
- versions: original; plain text
- ap-276
- author: Fořt, I.; Jirout, T.; Rieger, F.; Allner, R.; Sperling, R.
- title: Study of the Blending Efficiency of Pitched Blade Impellers
- date: 2001-01-06
- words: 4232
- flesch: 64
- summary: 1: Typical dependence of dimensionless blending time on the Reynolds number for a high-speed rotary impeller The initial concentration is defined as � �� �c c t0 0� � (5) and the final concentration of the dissolved matter in the agitated liquid is � �� �c c tk � . The quantity Po depends on the geometry of the system agitated by a PBI and this dependence can be expressed by the equation [7] � � � � � � � �Po T D h D H T n� � �1 507 0 365 0
- keywords: agitated; angle; blade; blending; calculated; clearance; concentration; criterion; czech; degree; diameter; different; dimensionless; efficiency; energetic; fig; flow; homogeneity; homogenization; impeller; liquid; mixed; mixing; mpa; number; pitch; process; ratio; system; time; total; values; vessel; viscosity; volume
- versions: original; plain text
- ap-278
- author: Böszörményi, L.; Böszörményi, G.
- title: A Geothermal Energy Supported Gas-steam Cogeneration Unit as a Possible Replacement for the Old Part of a Municipal CHP Plant (TEKO)
- date: 2001-01-06
- words: 2893
- flesch: 57
- summary: CHP combined heating and power plant GT gas turbine cycle ST steam turbine WHB waste heat boiler C condenser HE heat exchanger HP heat pump mFWH mass flow of secondary geothermal water used for heating feed water mDH mass flow of secondary geothermal water used for use in the DHN mSCGH mass flow of the secondary carrier of geothermal heat 2 The simple, direct use of geothermal heat in the District Heating Network (DHN) cannot be a feasible way of replacing the existing CHP plant under the current economic circumstances, due to its low efficiency.
- keywords: boiler; böszörményi; chp; cogeneration; combined; concept; cycle; dhn; efficiency; energy; fossil; fuels; gas; geothermal; geothermal energy; geothermal heat; geothermal water; heat; heating; košice; low; output; parameters; plant; power; production; pump; renewable; secondary; secondary geothermal; sources; steam; steam cycle; teko; turbine; unit; utilization; waste; water; year
- versions: original; plain text
- ap-280
- author: Beshay, K. R.; Kratěna, J.; Fořt, I.; Brůha, O.
- title: Power Input of High-Speed Rotary Impellers
- date: 2001-01-06
- words: 3319
- flesch: 69
- summary: 6/2001 Power Input of High-Speed Rotary Impellers K. R. Beshay, J. Kratěna, I. Fořt, O. Brůha This paper presents the results of an experimental investigation of the power input of pitched blade impellers and standard Rushton turbine impellers in a cylindrical vessel provided with four radial baffles at its wall under a turbulent regime of flow of an agitated liquid. 2: Sketch of pitched blade impellers (Czech standard CVS 691020)
- keywords: angle; blade; clearance; czech; diameter; experimental; fig; impeller; input; large; liquid; measured; motor; number; pitch; power; range; results; reynolds; rig; rushton; small; speed; srti; standard; test; torque; turbine; university; vessel
- versions: original; plain text
- ap-2808
- author: Juklíček, Jakub; Železný, Václav
- title: CFD ANALYSIS OF THE SPACER GRIDS AND MIXING VANES EFFECT ON THE FLOW IN THE CHOSEN PART OF THE TVSA-T FUEL ASSEMBLY
- date: 2015-10-31
- words: 2626
- flesch: 64
- summary: Nevertheless, this kind of simula- tion provides comparative data for more significant simplifications of the fuel assembly geometry or for replacement of the part or whole spacer grid geometry by the porous media boundary condition in CFD simu- lation. One of the limiting factors is the complicated geometry of spacer grids.
- keywords: analysis; area; assembly; boundary; cells; cfd; character; computational; cross; effect; fig; figure; flow; fuel; geometry; grid; mesh; mixing; mixing vanes; parts; simplified; simulation; spacer; spacer grid; support; tvsa; vanes; velocity; volumes
- versions: original; plain text
- ap-2813
- author: Žitný, Rudolf; Landfeld, Aleš; Skočilas, Jan; Štancl, Jaromír; Flegl, Vlastimil; Houška, Milan
- title: UNSTEADY FLOW OF THIXOTROPIC COLLAGEN SUBSTANCE IN PIPES
- date: 2015-10-31
- words: 4116
- flesch: 60
- summary: Such a slow variation of flow rate increases the number of time steps (4100 time steps for 151 grid points in the axial direction) and increases the run-time necessary for preliminary identification of thixotropic model parameters. 2D model of velocities and structural parameter profiles (finite differences) Results that are probably more realistic can be obtained by taking into account non-uniform structural parame- ter profiles.
- keywords: acta; axial; bulkley; characteristic; collagen; constant; czech; diffusion; doi:10.1016; equation; fig; flow; fluid; herschel; houska; hydraulic; hysteresis; journal; mechanics; method; model; newtonian; non; numerical; parameter; pipe; polytechnica; pressure; previous; profile; radial; rate; rheological; shear; stress; structural; s−1; thixotropic; time; transport; unsteady; value; velocities; velocity; wall; zitny; τ?y
- versions: original; plain text
- ap-282
- author: Doubek, J.; Kreidl, M.
- title: Parasitic Events in Envelope Analysis
- date: 2001-01-06
- words: 8209
- flesch: 76
- summary: No. 6/2001 1 x t( ) 0 �1 Fig. 9: Invariant part of the harmonic signal Equation (23) can be decomposed by equation (24) to equation (25) � � � � � � � � � �cos cos cos sin sin� � � � � � (24) and thus � � � � � � � � � �~ cos cos sin sin x t t z z z t z z z z z z z � � � � �� 1 0 0 0 0 1 2 1 � � � � � � � d d 2 � � � � � � � � � � . Si z Si� � � � � � � � � � � 1 0 0
- keywords: b t; calculation; cosx t; e t; e �; envelope; equation; figure; fmax �; g t; harmonic; pulse; signal; sin �; t ci; t et; t gt; t si; t t; t t1; t �; time t; txt �; y t; z t; � =; � cos; � h; � s; � y; � �
- versions: original; plain text
- ap-284
- author: Younis, F. I.; Alawy, A. El-Bassuny; Šimák, B.; Ella, M. S.; Madkour, M. A.
- title: Stellar Image Interpretation System using Artificial Neural Networks: Unipolar Function Case
- date: 2001-01-06
- words: 3932
- flesch: 66
- summary: 3.6 SIIS-ANN implementation The developed SIIS-ANN deals with CCD image frames for scanning and searching for the Local Central Peaked Pixel (LCPP) whose datum is larger than those of the surrounding ones [9, 10]. Mark the object of interest (star image, cosmic ray event, or noise) on some CCD frames.
- keywords: ann; artificial; astronomical; astronomy; case; ccd; cosmic; czech; daophotii; data; engineering; error; fig; frame; images; input; layer; learning; method; network; neural; noise; normalised; objects; output; pattern; pixel; present; ray; set; siis; star; stellar; system; technical; test; training; university; values; window
- versions: original; plain text
- ap-286
- author: Badawy, M.; Richta, K.
- title: Deriving Triggers from Integrity Constraint Specifications in the Database Management Systems
- date: 2001-01-06
- words: 4502
- flesch: 74
- summary: The cell and the request have to pass the path three times and the total time period needed for the cell transport � �Ts it 1 , i n� 1, ,� , is � � � � � � RM Data 1 2 3 Fig. 1: The flow of counted RM cells The symbols denote: M – distribution function of the cell interarrival time is exponential with the mean 1 0 � �, � � � and the ar- rival times are independent; M – distribution function of the cell service time is expo- nential with the mean 1 0 � �, � � � and the service times are independent; 1 – system with one place in service; m – system of queue length m. Notation used in the following text: � – average arrival intensity; � – average service rate; � � �� – traffic intensity.
- keywords: cell; data; destination; fig; k k; k n; mean; model; network; path; period; refusal; source; switch; switches; time; traffic; transport; value; w k
- versions: original; plain text
- ap-2865
- author: Biroš, Milan; Kyslan, Karol; Ďurovský, František
- title: A HARDWARE-IN-THE-LOOP SIMULATOR BASED ON REAL SKODA SUPERB VEHICLE AND RT-LAB/CARSIM
- date: 2015-12-31
- words: 4222
- flesch: 63
- summary: Skoda Superb vehicle simulator, rear view. This is because the vehicle has the best power transmission from the engine to the pavement with a particular slip value included in vehicle model.
- keywords: 22k; acta; angle; available; behavior; brake; card; carsim; components; control; cost; daq; digital; driver; driving; engine; fig; figure; forces; game; gear; hardware; hil; input; knob; lab; lever; line; loop; model; output; parameters; pedal; polytechnica; position; range; real; real vehicle; research; results; sensor; sequence; shifting; signal; simulator; skoda; software; speed; steering; steering wheel; superb; systems; time; use; vehicle; visualization; voltage; wheel
- versions: original; plain text
- ap-288
- author: Filip, J.
- title: Analytical Model of Modified Traffic Control in an ATM Computer Network
- date: 2001-01-06
- words: 4503
- flesch: 74
- summary: The cell and the request have to pass the path three times and the total time period needed for the cell transport � �Ts it 1 , i n� 1, ,� , is � � � � � � RM Data 9 8 ) 2 3 Fig. 1: The flow of counted RM cells The symbols denote: M – distribution function of the cell interarrival time is exponential with the mean 1 0 � �, � � � and the ar- rival times are independent; M – distribution function of the cell service time is expo- nential with the mean 1 0 � �, � � � and the service times are independent; 1 – system with one place in service; m – system of queue length m. Notation used in the following text: � – average arrival intensity; � – average service rate; � � �� – traffic intensity.
- keywords: cell; data; destination; fig; k k; k n; mean; model; network; path; period; refusal; source; switch; switches; time; traffic; transport; value; w k
- versions: original; plain text
- ap-290
- author: Pokorná, O.; Mocková, D.
- title: Models of Financing and Available Financial Resources for Transport Infrastructure Projects
- date: 2001-01-06
- words: 2208
- flesch: 47
- summary: A typical feature of transport infrastructure projects is that they are expensive and take a long time to construct. 2 Available financial resources Finance resources for transport infrastructure projects can be divided into public and alternative.
- keywords: build; capital; cash; construction; contracts; debt; development; financial; financing; flow; guarantees; infrastructure; investments; long; models; operation; participation; period; private; private sector; project; public; public sector; resources; return; revenue; risk; sector; state; transport; transport infrastructure; type
- versions: original; plain text
- ap-292
- author: Římal, J.
- title: Measurement of Temperature Fields in Long Span Concrete Bridges
- date: 2001-01-06
- words: 3393
- flesch: 66
- summary: These most important factors are combined into the equivalent sun-temperature Tas expressed in equation (1) � �T T I pas a g� � 1 � (1) where Ta � Ta(t) air temperature Ig � Ig(t) intensity of global solar radiation � � �(v) heat-transfer coefficient depending on air speed p coefficient of surface absorption t time Keywords: Nusle bridge in Prague, measurement of thermal fields, calculation of temperature fields, evaluation of stress fields.
- keywords: acta; bridge; c o; c r; czech; d e; e m; e n; e s; e t; fields; fig; house; http://ctn.cvut.cz/ap/; measurement; n c; o n; polytechnica; publishing; r e; stresses; structure; technical; temperature; thermal; time; university; vol
- versions: original; plain text
- ap-294
- author: Ficker, T.; Myslín, J.; Podešvová, Z.
- title: Non-linear Temperature Profiles
- date: 2001-01-06
- words: 2427
- flesch: 62
- summary: The solution of the system (20), (21) for parabolic conduc- tivity function (15) and the boundary conditions T ( 0) � T1, T ( d) � T2 reads � � � � q T T d T T T T d a T T Reff � � � � � � � �1 2 1 0 3 2 0 3 1 2 3 � , (27) � �� � � �� � � � � � � � � � x a T x T T x T a T T a T T T T a T T � � � � � � � � � � � 0 3 0 0 1 0 3 2 0 3 0 2 1 1 0 3 3 3 � � d, (28) � � � �� � � � R d a T T T T T T T T eff * � � � � � � � � � 1 0 2 1 0 2 0 2 0 2 0 3 � � d eff� , (29) � � � � � �� � � �� �� �� � � � � � � �eff T T T T� � � � � �13 1 2 1 0 2 0 0 . 2 Variable thermal conductivity Let us assume a dry material inside a wall whose thermal conductivity � depends only on temperature T ( x) � �� �d d � T x x 0.
- keywords: conductivity; constant; dependence; fig; function; heat; linear; non; parabolic; profile; range; t t; temperature; thermal; � eff
- versions: original; plain text
- ap-2942
- author: Halabuk, Dávid; Martinec, Jiří
- title: CALCULATION OF STRESS AND DEFORMATION IN FUEL ROD CLADDING DURING PELLET-CLADDING INTERACTION
- date: 2015-12-31
- words: 2207
- flesch: 62
- summary: It is possible to evaluate which shape of fuel pellet is the most appropriate in consideration of stress and deformation forming in fuel cladding, axial dilatation of fuel, and radial temperature distribution in the fuel rod, based on the obtained results. The calculations are done for 4 different shapes of fuel pellets.
- keywords: alloy; analysis; axial; calculation; central; chamfered; cladding; contact; deformation; difference; dilatation; dished; fuel; hole; interaction; mpa; nuclear; pellet; properties; reactor; results; rod; rods; shape; state; stress; temperature; thermal
- versions: original; plain text
- ap-2945
- author: Kratky, Lukas; Jirout, Tomáš
- title: MECHANICAL DISINTEGRATION OF WHEAT STRAW BY ROLLER-PLATE GRIND SYSTEM WITH SHARP-EDGED SEGMENTS
- date: 2015-04-30
- words: 7025
- flesch: 60
- summary: [7] studied the effect of wheat straw particle size on the efficiency of biogas digesters operating on agricultural and for- est residues. [6] studied the effect of wheat straw particles on biogas yield and on residue production in anaerobic technology.
- keywords: acta; anaerobic; average; biodegradability; biogas; biogas production; biomass; chemical; cod; colloid; compressive; content; demand; determined; disintegrated; disintegration; energy; experiments; fibrous; figure; forces; gap; grinder; grinding; hammer; impact; increase; jirout; kratky; kwh; kwh t−1; lignocellulosic; material; mechanical; methane; mill; milled; milling; moisture; nm3; particle; plate; polytechnica; power; pretreatment; process; production; requirement; results; retting; roller; rotational; segments; shear; sieve; size; solids; specific; speed; straw; technology; temperature; time; total; t−1; untreated; wet; wheat; wheat straw; wt%; yield
- versions: original; plain text
- ap-2950
- author: Petrů, Jan; Kludka, Michal; Krivda, Vladislav; Mahdalova, Ivana; Zeman, Karel
- title: VERIFICATION OF CENSUS DEVICES IN TRANSPORTATION RESEARCH
- date: 2015-12-31
- words: 4193
- flesch: 66
- summary: NU-METRICS NC-200 and NU-METRICS NC-30x traffic analyzer The Nu-Metrics NC-200 traffic analyser is used for measuring vehicle speed, and the intensity and com- 415 http://dx.doi.org/10.14311/AP.2015.55.0415 http://ojs.cvut.cz/ojs/index.php/ap J. Petru, M. Kludka, V. Krivda et al. This article evaluates and subsequently compares data obtained from various counting devices measur- ing the intensity of traffic on a roundabout in the city of Ostrava.
- keywords: analyzer; article; average; categories; city; comparison; counting; data; devices; difference; direction; fig; icoms; intensity; intersection; kph; lane; length; location; manual; measured; measurement; measuring; methods; metrics; nc-200; number; ostrava; percentage; place; radar; respective; results; road; speed; tms; traffic; truck; value; vehicles; viacount; viacount ii; video
- versions: original; plain text
- ap-296
- author: Attia, Abdel-Fattah; Horáček, P.
- title: Modeling Nonlinear Systems by a Fuzzy Logic Neural Network Using Genetic Algorithms
- date: 2001-01-06
- words: 5237
- flesch: 67
- summary: In the gen- eral case the intervals of acceptable values for every MF shape forming parameter (e.g., �c � [c11, c22], and �� � [�11, �22] for Gaussians) may be determined by solving formulas (8), (9), and (10). �11, and �22 can easily be found from the following four equations: � � � � � � � � G c c G c
- keywords: 2nd; act; acta; algorithm; chromosome; constraints; control; crisp; czech; data; fig; flnn; function; fuzzy; gaussian; genetic; input; laga; layer; learning; line; logic; membership; mfs; model; modeling; network; neural; optimization; order; output; parameters; polytechnica; population; process; reference; rule; search; section; sets; shape; sin; systems; technical; time; university; values; vol; � y; � �
- versions: original; plain text
- ap-2966
- author: Lisý, Martin; Baláš, Marek; Špiláček, Michal; Skála, Zdeněk
- title: OPERATING SPECIFICATIONS OF CATALYTIC CLEANING OF GAS FROM BIOMASS GASIFICATION
- date: 2015-12-31
- words: 3933
- flesch: 51
- summary: The efficiency of tar elimination reached 99.5 %, the tar concentration complied with limits for use of the gas in combustion engines, and the tar content reached approximately 35 mg/m3n. The fundamental classification dis- tinguishes between primary and secondary measures for tar elimination.
- keywords: acta; air; analysis; baláš; bed; biofluid; biomass; biomass gasification; calcination; catalyst; catalytic; cleaning; co2; composition; conditions; content; cracking; dolomite; efficiency; elimination; energy; engineering; filter; flow; fluidized; fuel; gas; gasification; gasifier; high; higher; inlet; lisý; m3n; material; methods; natural; operating; outlet; partial; polytechnica; pressure; primary; reactions; research; results; sampling; secondary; specifications; steam; suitable; syngas; table; tar; tar elimination; technology; temperature; use; verification; wood
- versions: original; plain text
- ap-2970
- author: Nasisi, Salvatore; Valášek, Michael; Vampola, Tomáš
- title: AN INTERPOLATION METHOD FOR DETERMINING THE FREQUENCIES OF PARAMETERIZED LARGE-SCALE STRUCTURES
- date: 2015-12-31
- words: 5757
- flesch: 47
- summary: doi:10.2514/6.2009-2432 [18] H. Panzer, R. Eid, B. Lohmann, Parametric model order reduction by matrix interpolation, Automatisierungstechnik, 58 (2010) 475-484. Although this scheme seems attractive due to the use of reduced matrices and available functions for computing interpolating poly- nomials, it produces ineffective results.
- keywords: accuracy; acta; analyses; application; components; computation; continuum; decomposition; deformation; design; different; direct; element; engineering; equations; error; example; figure; finite; frequencies; frequency; hexapod; interest; interpolation; interpolation method; large; length; linear; mass; matrices; matrix; mechanics; method; model; number; order; parameters; parametric; point; polar; polytechnica; process; reduction; results; rigid; rom; roms; rotation; rsdm; second; solid; space; stiffness; stretch; structure; svd; system; time; use; values
- versions: original; plain text
- ap-2974
- author: Dragošek, Lukáš; Kociško, Róbert; Kováčová, Andrea; Bidulsky, Robert; Škrobian, Milan
- title: A COMPACTING PROCESS OF THE EN AW 6060 ALLOY
- date: 2015-10-31
- words: 2597
- flesch: 61
- summary: Moreover, it was recognized that in the process of small chips compacting, there was obtained lower density than in the case of large chips. Compacting chips The two types of chips were compacted under identical conditions (weight 2, 5, 10 g; compacting pressure 300, 400, 500, 600, 700 MPa; and speed 0.83 mm/s).
- keywords: a.e; acta; aluminium; chips; compacting; conditions; density; die; distribution; doi; experimental; extrusion; figure; final; forward; friction; height; journal; large; materials; method; porosity; pressure; process; processing; ratio; sample; significant; small; technology; tekkaya; types
- versions: original; plain text
- ap-2978
- author: Holčapek, Ondřej; Vogel, Filip; Konvalinka, Petr
- title: ANALYSIS OF MECHANICAL PROPERTIES OF HYDROTHERMALLY CURED HIGH STRENGTH CEMENT MATRIX FOR TEXTILE REINFORCED CONCRETE
- date: 2015-10-31
- words: 4421
- flesch: 49
- summary: Hydrothermal curing in an autoclave device (with a combination of high pressure and temperature, under the simultaneous effect of steam) provides a sophis- ticated possibility to achieve high final strength in a short time after the first contact between water and cement (approximately 2 days). The bulk density growth is as- 317 O. Holčapek, F. Vogel, P. Konvalinka Acta Polytechnica sociated with denser microstructure and hydration products due to hydrothermal curing conditions.
- keywords: autoclave; cement; characteristics; compressive; compressive strength; concrete; conditions; curing; days; different; dynamic; elasticity; experimental; figure; flexural; frcm; high; higher; holčapek; hours; hydrothermal; konvalinka; material; matrix; mechanical; modulus; mpa; performance; pressure; process; production; properties; research; samples; specimens; steel; strength; temperature; textile; time; uhpc; values; vol; water
- versions: original; plain text
- ap-298
- author: Kršňák, I.; Kolcunová, I.
- title: Partial Discharge Measurements in HV Rotating Machines in Dependence on Pressure of Coolant
- date: 2002-01-01
- words: 2395
- flesch: 53
- summary: Keywords: partial discharges, stator insulation, high voltage rotating machine, phase resolved partial discharge analysis. In technical and scientific literature, the influence of pres- sure on partial discharge measurement has not been handled very often.
- keywords: adobe; coefficient; collisions; coolant; discharge; electrical; electron; energy; false; field; fig; free; gas; high; higher; inception; ionisation; kpa; machines; mean; measurements; partial; particles; path; pdf; phase; pressure; strength; technical; temperature; theoretical; true; value; voltage
- versions: original; plain text
- ap-2982
- author: Havrlik, Michal; Ryparová, Pavla
- title: PROTECTION OF WOODEN MATERIALS AGAINST BIOLOGICAL ATTACK BY USING NANOTECHNOLOGY
- date: 2015-04-30
- words: 4367
- flesch: 64
- summary: 108 Acta Polytechnica 55(2):101–108, 2015 1 Introduction 2 The experimental part 3 Materials and methods 3.1 Production of PVA solution 3.2 Produce of nanofiber textiles 3.3 Model organism 3.4 Plate experiment 3.5 Experiment on building block of timber 3.6 Fungicidal activity of polymer solution on agar plate 3.7 Fungicidal activity of nanofiber textiles on agar plate 3.8 Fungicidal activity of polymer solution on wooden blocks 3.9 Fungicidal activity of nanofiber textiles on wooden blocks 4 Results 4.1 Fungicidal activity of polymer solution on agar plate 4.2 Fungicidal activity of nanofiber textiles on agar plate 4.3 Fungicidal activity of polymer solution on wooden blocks 4.4 Fungicidal activity of nanofiber textiles on wooden blocks 5 Discussion and conclusion 5.1 Solutions and textiles 5.2 PVA 5.3 Protective biocide ions 5.4 Summary Acknowledgements References Production of PVA solution The base polymer which we used in this work, is a polyvinyl alcohol (PVA).
- keywords: acta; activity; agar; agents; biocidal; biocide; biological; block; building; civil; concentration; copper; czech; days; development; efficiency; engineering; evaluation; experiment; figure; fungicidal; growth; ions; lignofix; materials; mixture; mold; mycelium; nanofiber; nanofiber textiles; organism; plate; polymer; polytechnica; prague; profi; properties; protection; pure; pva; results; ryparová; samples; silver; solution; textiles; timber; treatment; type; vol; wood; wooden; xxx
- versions: original; plain text
- ap-2983
- author: Kühnel, M.; Müller, S.; Kreykenbohm, I. Kreykenbohm; Schwarm, F.-W.; Grossberger, C.; Dauser, B. T.; Nowak, M. A.; Pottschmidt, K.; Ferrigno, C.; Rothschild, R. E.; Klochkov, D.; Staubert, R.; Wilms, J.
- title: SIMULTANEOUS FITS IN ISIS ON THE EXAMPLE OF GRO J1008–57
- date: 2015-04-30
- words: 3144
- flesch: 57
- summary: Furthermore, it is necessary to distinguish between group parameters and global parameters. Global parameters denote parameters which act on all datagroups.
- keywords: acta; analysis; available; calculations; data; datagroup; datasets; dependency; different; example; fits; fitting; flux; functions; global; group; implementation; individual; isis; j1008–57; large; law; model; multiple; parallel; parameters; polytechnica; power; ray; results; runtime; section; simultaneous; single; spectra; transient; uncertainties; uncertainty; vol; xspec
- versions: original; plain text
- ap-300
- author: Dynda, V.; Rydlo, P.
- title: Large-scale File System Design and Architecture
- date: 2002-01-01
- words: 4838
- flesch: 59
- summary: � Cryptography for securing user data and support for any appropriate cipher algorithm to protect data. Keywords: file system, replication schema, data protection, consistency, data locating.
- keywords: access; algorithm; architecture; availability; clients; consistency; data; design; distributed; edges; example; expansion; fig; file; file system; filters; gaston; gfs; graph; high; large; location; managers; means; necessary; neighbor; network; node; number; order; partition; protection; rcnt; read; replica; replication; requests; rm4; rmi; rmj; scale; scheme; security; servers; storage; support; system; test; time; transaction; users; vol; write
- versions: original; plain text
- ap-3006
- author: Kronek, Jakub; Žitný, Rudolf
- title: FINITE ELEMENT ANALYSIS OF AORTAL BIFURCATION
- date: 2015-12-31
- words: 5074
- flesch: 58
- summary: The solution (Mises stress) converged with the two mesh density parameters (Figure 3). Mises stress (σnomin1, σnomin2), and the distances from the beginning of the paths (lK1, lK2), where the stress drops almost to its nominal value (σ < 1.1σnomin).
- keywords: acta; analysis; angle; aortic; apex; arterial; atherosclerosis; bifurcation; calculated; carotid; cia; constant; daa; doi:10.1016; elastic; element; engineering; evaluated; factor; figure; finite; geometrical; geometries; geometry; hooke; hyper; increase; internal; journal; linear; material; maximum; measurements; mechanical; mesh; mises; mmhg; model; mpa; non; ogden; parameters; path; polytechnica; pressure; properties; regression; results; scf; shear; stress; stresses; study; taa; thickness; values; vascular; vol; wall
- versions: original; plain text
- ap-302
- author: Jokl, M. V.
- title: Thermal Comfort and Optimum Humidity Part 1
- date: 2002-01-01
- words: 7554
- flesch: 56
- summary: This limit enables another hygienic requirement for interiors to be estimated: the acceptable difference be- tween air temperature and surface, wall temperature, and the corresponding difference between air temperature and globe temperature in winter. Air temperature in an enclosed space generally increases from floor to ceiling.
- keywords: acceptable; acta; activity; air; air temperature; ashrae; asymmetry; body; broadcloth; building; center; change; clothing; cold; comfort; conditions; cooling; czech; difference; discomfort; draft; environment; fig; floor; globe; hard; head; heat; higher; house; http://ctn.cvut.cz/ap/; human; humidity; hydrothermal; indoor; insulation; jokl; length; level; light; limit; local; long; mites; new; operative; operative temperature; optimum; people; polytechnica; prague; publishing; radiant; radiation; relative; sedentary; shirt; shoes; sleeve; sources; space; speed; standard; summer; surface; table; technical; temperature; thermal; thick; university; values; vapor; ventilation; vertical; vol; water; windows; winter; work
- versions: original; plain text
- ap-3026
- author: Koleňák, Roman; Prach, Michal; Kostolný, Igor
- title: ULTRASONIC SOLDERING OF Cu AND Al2O3 CERAMICS BY USE OF Bi-La AND Bi-Ag-La SOLDERS
- date: 2016-04-30
- words: 4592
- flesch: 68
- summary: % lanthanum addition and Bi solder with 2 wt. 5 Microstructure of Bi2La solder with La phases and microstructure with twins Fig.
- keywords: al2o3; alloys; analysis; application; bi11ag2la; bi2la; bi2la solder; bismuth; boundary; ceramic; chemical; composition; concentration; conductivity; doi; dsc; fig; figure; formation; free; high; joint; journal; koleňák; lanthanum; lead; materials; matrix; melting; metallic; microstructure; new; phases; results; solder; soldering; substrate; table; temperature; type; ultrasonic; use; vol
- versions: original; plain text
- ap-3028
- author: Urminsky, Jan; Marônek, Milan; Jáňa, Miroslav; Morovič, Ladislav
- title: ANALYSIS OF WELD JOINT DEFORMATIONS BY OPTICAL 3D SCANNING
- date: 2016-02-29
- words: 2636
- flesch: 57
- summary: This paper presents an analysis of weld joint deformation using optical 3D scanning. Angular deformations are adverse from all group and can degrade the utility of the weld- ment.
- keywords: alloy; analysis; angular; atos; az31b; bimetal; bratislava; colour; deformation; deviation; explosion; explosive; figure; gom; https://support.gom.com; joints; materials; max; measurements; measuring; methods; optical; quality; scanned; scanning; steel; surface; table; trnava; volume; weld; welding
- versions: original; plain text
- ap-3032
- author: Prachař, Aleš
- title: COMPARISON OF AXIAL FAN ROTOR EXPERIMENTAL DATA WITH CFD SIMULATION
- date: 2016-02-29
- words: 2616
- flesch: 61
- summary: The measured quantities, obtained as functions of radial coordinate, were later utilized to calculate inte- gral values (volume flow rate, average total or static pressure). However, the exit static pressure is influenced by the performance of the rotor at various volume flow rates.
- keywords: acta; agreement; axial; blade; boundary; calculation; cfd; comparison; conditions; data; downstream; edge; experimental; fan; fans; fig; figure; flow; fluid; grid; inlet; measured; model; polytechnica; pressure; problems; radial; relative; research; results; rig; rotor; scheme; settings; simulation; solver; stall; static; structure; s−1; test; total; turbulence; upstream; vector; velocity; volume
- versions: original; plain text
- ap-3033
- author: Hromadka, David; Chlup, Hynek; Žitný, Rudolf
- title: INTEGRAL METHODS FOR DESCRIBING PULSATILE FLOW
- date: 2016-04-30
- words: 4785
- flesch: 68
- summary: Keywords: pulsatile flow, integral energy, integral momentum, rigid pipe. To the best of the author’s knowledge, there is no in- tegral energy solution for pulsatile flow that takes into account the reverse flow.
- keywords: acta; approximate; balance; basis; calculated; constant; deviation; difference; differential; energy; equations; error; exact; finite; flow; fluid; function; gradient; i=0; i=1; integral; journal; kinetic; laminar; mathematical; method; model; momentum; pressure; profile; pulsatile; rate; results; reverse; rigid; shear; solution; stress; s−1; time; total; tube; u(r; u2(t; velocity; wall; womersley; πr2
- versions: original; plain text
- ap-3037
- author: Kalde, Nassim; Simonin, Olivier; Charpillet, François
- title: COMPARISON OF CLASSICAL AND INTERACTIVE MULTI-ROBOT EXPLORATION STRATEGIES IN POPULATED ENVIRONMENTS
- date: 2015-06-30
- words: 4946
- flesch: 58
- summary: Multi-robot exploration consists in coordinating robots for mapping an unknown environment. Multi-robot exploration of unknown environments with identification of exploration completion and post-exploration rendez-vous using ant algorithms.
- keywords: acta; agent; approach; assignments; average; best; charpillet; classical; conference; cost; coverage; distance; environment; exploration; fig; figure; frontier; greedy; grid; group; heuristic; hri; human; ieee; intelligent; interaction; international; local; mixed; mobile; model; mre; multi; penalties; penalty; performance; polytechnica; populated; presence; present; proceedings; robot; robot exploration; robotics; set; space; study; system; targets; task; time; unknown; unstructured
- versions: original; plain text
- ap-3039
- author: Kulich, Miroslav; Juchelka, Tomáš; Přeučil, Libor
- title: COMPARISON OF EXPLORATION STRATEGIES FOR MULTI-ROBOT SEARCH
- date: 2015-06-30
- words: 4852
- flesch: 66
- summary: In addition, approaches based on K-means clustering and assigning the clusters to particular robots are presented in [16, 17] Intuitively, multi-robot search is a process of au- tonomous navigation of a team of mobile robots in an a-priori unknown environment in order to find an ob- 162 http://dx.doi.org/10.14311/AP.2015.55.0162 http://ojs.cvut.cz/ojs/index.php/ap vol. Framework The framework for multi-robot search is based on Yamauchi’s frontier-based approach [9], successfully used for exploration, which uses an occupancy grid as the environment representation.
- keywords: algorithm; approach; area; art; assignment; comparison; conf; cost; doi:10.1109; environment; experiments; exploration; figure; framework; frontier; function; goal; greedy; hospital; hungarian; ieee; int; left; map; means; method; multi; new; number; object; optimal; order; paper; path; planning; problem; process; region; results; right; robotics; robots; search; selection; single; step; strategies; strategy; task; time; unknown
- versions: original; plain text
- ap-304
- author: Ficker, T.; Podešvová, Z.
- title: Non-isothermal Diffusion of Water Vapour in Porous Building Materials
- date: 2002-01-01
- words: 1727
- flesch: 60
- summary: For this purpose the coefficient of diffusion permeability � is defined as follows � �� T g d p p * � � d 1 2 (1), T T T * � �1 2 2 (2) where d is the thickness of the envelope (wall), gd is diffusion flux and p1, p2 are partial pressures of water vapour at both surfaces of the wall. 2 Non-isothermal diffusion of water vapours If there are no sources of diffusing particles and unidirect- ional steady state diffusion through a porous medium with diffusion constant D has been established, then Fick’s general equations can be rewritten in the simpler form q D c x d d d � � , (3) d d d dx D c x � � � � 0, (4) where concentration c of diffusing particles, i.e. molecules of water vapour, can be replaced by partial pressure p and absolute temperature T, according to the equation of thermo- dynamic state pV mRT c m V c R p T R� � � � � �, , , [ ] 1 462 1 1Jkg K .
- keywords: conditions; diffusion; isothermal; non; p t; partial; porous; pressure; profile; t t; temperature; vapour; wall; water
- versions: original; plain text
- ap-3040
- author: Matignon, Laetitia; Jeanpierre, Laurent; Mouaddib, Abdel-Illah
- title: DECENTRALIZED MULTI-ROBOT PLANNING TO EXPLORE AND PERCEIVE
- date: 2015-06-30
- words: 6176
- flesch: 61
- summary: Then we present our Dec- MDP resolution, based on DVF, and its application to multi-robot exploration. 176 http://dx.doi.org/10.1109/TRO.2004.839232 http://dx.doi.org/10.1109/IROS.2008.4650734 http://dx.doi.org/10.1109/ROBOT.2002.1013690 http://dx.doi.org/10.1007/s10514-012-9298-8 http://dx.doi.org/10.1109/IRDS.2002.1041445 http://dx.doi.org/10.1016/j.artint.2011.05.001 http://dx.doi.org/10.1109/ICRA.2012.6224937 Acta Polytechnica 55(3):169–176, 2015 1 Introduction 2 Context 2.1 The CaRotte Challenge 2.2 The Robots_Malins System 3 State of the art 3.1 Multi-robot exploration 3.2 Active perception combined with exploration 4 Interaction-oriented Models 4.1 Background on Dec-MDP 4.2 Interaction-oriented Models 5 DVF for multi-robot exploration 5.1 Interaction Sparse Dec-MDP with DVF 5.2 DVF applied to multi-robot exploration 5.2.1 MDP Model 5.2.2 DVF 5.2.3 Decision step 5.2.4 Experiments 6 Planning to explore and perceive 6.1 DVF extension to improve photo coverage of the space
- keywords: a.-i; acta; active; agent; algorithm; areas; arena; augmented; autonomous; camera; challenge; complexity; coordination; coverage; decentralized; decision; detection; different; distributed; dvf; environment; experiments; exploration; frontier; function; global; information; interaction; jeanpierre; joint; layer; local; location; map; mapping; mdp; mdps; mission; models; module; mouaddib; multi; new; object; perception; photos; pictures; planning; policy; present; proc; real; recognition; resolution; reward; robot; robot exploration; set; space; state; step; system; taking; time; unknown; value
- versions: original; plain text
- ap-3047
- author: Kühnel, Matthias; Falkner, Sebastian; Grossberger, Christoph; Ballhausen, Ralf; Dauser, Thomas; Schwarm, Fritz-Walter; Kreykenbohm, Ingo; Nowak, Michael A.; Pottschmidt, Katja; Ferrigno, Carlo; Rothschild, Richard E.; Martínez-Núñez, Silvia; Torrejón, José Miguel; Fürst, Felix; Klochkov, Dmitry; Staubert, Rüdiger; Kretschmar, Peter; Wilms, Jörn
- title: THE GOODNESS OF SIMULTANEOUS FITS IN ISIS
- date: 2016-02-29
- words: 4403
- flesch: 66
- summary: After a model with p parameters has been defined each of these data-groups is fitted by an individual set of parameters, called group parameters. A model with p + P parameters is fitted such that each data-group has its own set of pi parameters, called group parameters.
- keywords: account; acta; analysis; case; combined; continuum; data; datasets; degrees; energy; example; failed; features; fig; fit; fits; freedom; functions; global; goodness; group; histogram; individual; iron; isis; j1008−57; kev; kühnel; line; model; number; parameters; ray; residuals; simultaneous; simultaneous fit; spectra; spectrum; statistics; value; vela; x-1; xte; χ2red
- versions: original; plain text
- ap-306
- author: Jokl, M. V.
- title: Thermal Comfort and Optimum Humidity Part 2
- date: 2002-01-01
- words: 3818
- flesch: 58
- summary: For warm air heating, the above pattern of air streams within a room is the best way to prevent the formation of a cold draft. The basic principle for warm air heating is that warm air must be released from above and must then go down, i.e., it must be supplied to the ceiling of a room.
- keywords: air; body; building; ceiling; changes; cold; comfort; conditioning; control; cooling; czech; draft; environment; fig; heating; human; humidity; hydrothermal; individual; indoor; interior; jokl; location; louvres; new; optimum; prague; principle; room; source; summer; system; technical; temperature; university; vapor; ventilation; warm; water; way; window; winter
- versions: original; plain text
- ap-3064
- author: Sirůčková, Hana
- title: EXPERIMENTAL LEVELLING AT THE INTERFACE OF OPTICAL ENVIRONMENTS
- date: 2016-04-30
- words: 4732
- flesch: 62
- summary: Temperature measurement The temperatures were measured with the digital ther- mometer BTM-42083D equipped with 12 temperature sensors. Temperature sensors were positioned, the levelling set was measured between the exterior point and a point in the centre of the atrium.
- keywords: 007; building; calculated; december; difference; dna; effect; entrance; environments; experiment; february; figure; ground; height; horizontal; humidity; influence; instrument; interface; koni; levelling; library; line; measured; measurement; measuring; november; optical; outside; point; prague; pressure; range; refraction; sensors; sight; temperature; temperature sensors; values; vertical; weather
- versions: original; plain text
- ap-308
- author: Pokorná, O.; Mocková, D.
- title: The Risks of Investments in Transport Infrastructure Projects
- date: 2002-01-01
- words: 2880
- flesch: 49
- summary: The main risks facing infrastructure projects are pre-con- struction activity, construction, traffic and revenue, currency, force majeure, tort liability, political risk and financial risk. Financial risks: interest rates Financial risk is the risk that project cash flows may be insufficient to cover debt servicing and then to pay an adequate return on sponsor equity.
- keywords: analysis; best; capital; changes; construction; contracts; costs; currency; czech; debt; decision; delays; evaluation; finance; financial; financing; force; form; government; guarantees; identification; infrastructure; interest; investment; investors; land; legal; majeure; major; phase; political; pre; private; project; public; regulatory; responsibility; revenue; risks; sector; technical; toll; traffic; transport; university
- versions: original; plain text
- ap-3088
- author: Horník, Jakub; Krum, Stanislav; Tondl, David; Puchnin, Maxim; Sachr, Pavel; Cvrček, Ladislav
- title: MULTILAYER COATINGS Ti/TiN, Cr/CrN AND W/WN DEPOSITED BY MAGNETRON SPUTTERING FOR IMPROVEMENT OF ADHESION TO BASE MATERIALS
- date: 2015-12-31
- words: 1969
- flesch: 56
- summary: Highest adhesion was achieved in case of W/WN and Cr/CrN. The combi- nation of highest hardness, modulus of elasticity and best adhesion promotes W based coatings, especially the FGM type, to be very perspective for tribological application. cupola character, in case of W based coating prevails the cauliflower appearance.
- keywords: acta; adhesion; case; coatings; composition; crn; deposition; elasticity; fgm; hardness; layers; load; materials; max; mechanical; modulus; multilayer; properties; pvd; results; scratch; steel; structure; substrate; surface; systems; test; values; wt%
- versions: original; plain text
- ap-310
- author: Rieger, F.
- title: Pumping Efficiency of Screw Agitators in a Tube
- date: 2002-01-01
- words: 1400
- flesch: 62
- summary: In the turbulent region, the values of a and c / Re are independent of Re, and the power characteristic can be approximated by the following equation Po c ae� � �Re . The effect of Reynolds number on pumping characteristics was shown in [1].
- keywords: characteristics; dependence; dimensionless; efficiency; fig; max; number; power; pumping; region; reynolds; screw; values
- versions: original; plain text
- ap-3105
- author: Košťáková, Petra; Stovicek, Pavel
- title: THE AHARONOV-BOHM HAMILTONIAN WITH TWO VORTICES REVISITED
- date: 2016-06-30
- words: 7247
- flesch: 79
- summary: For x,y ∈ M̃ ∪A∪B set χ(x,y) = 1 if the points x, y can be connected by a geodesic segment, and χ(x,y) = 0 otherwise. Verification of the propagator formula We have to show that, for x0 ∈ M̃ fixed, the propagator K(t,x,x0) defined in (9), (10) verifies the condition( i ∂ ∂t + ∆ ) K(t,x,x0)
- keywords: acta; aharonov; analysis; bloch; bohm; boundary; case; covering; c∞0; denote; differential; discrete; domain; equivariant; exp; extension; finite; formula; free; function; fundamental; geodesic; group; half; hamiltonian; hilbert; k(t; kγ(t; magnetic; manifold; math; operator; path; periodic; phys; plane; points; polytechnica; propagator; set; space; terms; tn−1; type; unitary; universal; values; vortices; z(t; šťovíček; χ(x; ∂−→n
- versions: original; plain text
- ap-312
- author: Kavan, M.
- title: Education for Production and Operations Management
- date: 2002-01-01
- words: 3486
- flesch: 44
- summary: Keywords: production and operations management, study programme, department of mechanical engineering enterprise management, Czech business and industry,Czech Technical University in Prague, education, lean operations management, Toyota production system. This programme brings together theory and prac- tice in a broad overview of operations management (OM), dealing with the production process, interactions with other business functions, and also business strategy.
- keywords: activities; business; concepts; control; course; czech; department; design; education; effective; engineering; enterprise; faculty; field; house; industry; inventory; knowledge; lean; learning; management; manufacturing; new; operations; operations management; organizations; planning; practices; prague; principles; problem; process; production; products; programme; quality; research; services; strategy; students; study; systems; teaching; teams; technical; time; today; tools; training; university; work; world
- versions: original; plain text
- ap-314
- author: Coiro, D. P.; Nicolosi, F.
- title: Design of a Three Surfaces R/C Aircraft Model
- date: 2002-01-01
- words: 5620
- flesch: 60
- summary: It can be observed that canard stalls around � � 16° and this reflects on global lift and especially the global moment coefficient curve. It can be observed that the global (TOT) moment curve strongly “feels” the canard stall at � � 16° and a high negative pitching tendency results.
- keywords: acta; aerodynamic; aircraft; airfoil; analysis; angles; canard; characteristics; chord; code; conditions; configuration; czech; design; dimensions; drag; efficiency; engine; fig; flap; flight; fuselage; good; high; higher; house; http://ctn.cvut.cz/ap/; lift; low; main; maximum; measured; model; moment; polytechnica; position; power; propeller; publishing; results; span; speed; stability; stall; surface; table; tail; technical; tunnel; university; vol; weight; wind; wing
- versions: original; plain text
- ap-3143
- author: Plankovskyy, Sergiy; Shypul, Olga; Tsegelnyk, Yevgen; Tryfonov, Oleg; Golovin, Ivan
- title: SIMULATION OF SURFACE HEATING FOR ARBITRARY SHAPE’S MOVING BODIES/SOURCES BY USING R-FUNCTIONS
- date: 2016-12-31
- words: 3693
- flesch: 61
- summary: Keywords: numerical methods; moving heat sources; ray tracing; R-functions method. The problem of heating bodies of finite dimensions by moving heat sources is considered in fewer studies.
- keywords: action; analytical; arbitrary; axis; beam; blade; bodies; body; boolean; case; complex; determination; energy; equal; expression; figure; flux; functions; geometric; geometry; heat; heat source; heated; heating; journal; jrad; laser; law; mesh; method; motion; numerical; plasma; points; primitives; problem; ray; shape; simulation; sin; source; sputtering; substrate; surface; system; temperature; time; tracing; use; value; ϕ̇1
- versions: original; plain text
- ap-316
- author: Barták, J.; Hilar, M.; Pruška, J.
- title: Numerical Modelling of Overburden Deformations
- date: 2002-01-01
- words: 4527
- flesch: 54
- summary: � After comparing of in situ measured deformation values with calculated deformations on the basic model, the ef- fect of parametric changes on the final deformations was investigated. Horizontal deforma- tions up to 1.6 mm and vertical deformations up to 1.3 mm occurred in the area of the diaphragm wall when the jet-grout curtain was set.
- keywords: analysis; area; behaviour; construction; cross; curtain; czech; deformations; excavation; exploratory; face; fig; foundation; grouting; heading; horizontal; hvížd’alka; influence; jet; length; lining; mass; massif; maximum; means; measured; mesh; model; modelling; monastery; mrázovka; numerical; plaxis; profile; reduction; results; rock; section; sequencing; settlement; situ; stress; structure; surface; technical; tunnel; type; underground; utility; values; vertical; wall
- versions: original; plain text
- ap-318
- author: Rao, N.; Kusumo, R.; Sinha, A. K.; Scott, M. L.
- title: System Framework for the Design of an Avionics Architecture with Upgrade Potential
- date: 2002-01-01
- words: 1997
- flesch: 39
- summary: The complexity of avionics upgrade process is due to the design rigidity of avionics systems architecture. Keywords: avionics systems, avionics upgrade, system approach, avionics architecture.
- keywords: advanced; aircraft; analysis; approach; architecture; art; asa; avionics; components; design; framework; functional; growth; insertion; life; methodology; mid; military; mission; modules; needs; new; parameters; potential; process; requirements; scott; service; sinha; state; structure; system; technological; technology; upgrade
- versions: original; plain text
- ap-320
- author: Cooper, G.; Thompson, G.
- title: Concept Design and Reliability
- date: 2002-01-02
- words: 6543
- flesch: 55
- summary: It is an integrated product design process that is presently being pursued as a collabora- tive activity between the Polhem Laboratory, Lule Technical University, Sweden and UMIST, UK in collaboration with major manufacturing industries in Sweden. Derivation of the specification and concept design is an integrated activity. Thus concept design becomes a set of divergent-convergent design activities that develop an immature concept to maturity by strengthening the concept in response to the salient design requirements.
- keywords: acta; analysis; available; concept; conceptual; conceptual design; czech; data; design; designer; detail; development; early; engineering; envelope; excursion; failure; fault; fig; fluid; fta; functional; graph; hazard; house; http://ctn.cvut.cz/ap/; improvement; increase; information; isbn; iterative; limiting; load; margin; mean; methodology; methods; multi; need; new; number; objective; order; performance; polytechnica; problem; process; product; publishing; rate; reliability; reliable; requirements; results; robust; safety; solid; solutions; space; specification; stage; standard; system; table; technical; techniques; toolbox; tools; university; use; vol
- versions: original; plain text
- ap-322
- author: Jokl, M. V.
- title: The Impact of Odors
- date: 2002-01-02
- words: 4872
- flesch: 60
- summary: Indoors, flowers and man-made aromas (cosmetics and detergents, smoke from an open fireplace) are sources of pleasant smells. Odoriferous substances have to come into con- tact with a mucous membrane, if smell perception is to be evoked.
- keywords: 1989r; acta; adapted; admissible; age; air; ashrae; asthm; bad; building; co2; concentration; czech; dcd; dissatisfied; eur; feelings; fig; house; http://ctn.cvut.cz/ap/; human; impact; indoor; interior; jokl; level; limit; long; materials; microclimate; new; odor; optimal; organic; people; perception; person; pleasant; pollution; polytechnica; publishing; quality; range; sense; short; smell; smoke; smoking; sources; standard; subjects; table; technical; term; time; tolerable; tvoc; unadapted; units; university; values; ventilation; vol
- versions: original; plain text
- ap-324
- author: Jokl, M. V.
- title: Optimization of the Odor Microclimate
- date: 2002-01-02
- words: 3055
- flesch: 64
- summary: The following equation should be used in the rooms where odor agents, released from building materials, are deci- sive for outdoor air rate: � � R G B B iTVOC e TVOC � �3 6. � � [l/s�m2] (1) where RB � minimum outdoor air rate related to 1 m 2 of floor [l/s�m2], GB � TVOC rate produced within an interior [�g/h�m2 floor] (see Table 1), �eTVOC � TVOC concentration in outdoor air Emission rates declined slowly Table 1: TVOC Emission rates in a building interior sults must be proved by calculations of air rates related to one person.
- keywords: acta; agents; air; building; carbon; change; chemical; cleaning; co2; concentration; converted; crump; czech; eur; fig; high; house; http://ctn.cvut.cz/ap/; human; indoor; jokl; lily; materials; microclimate; odor; olf; outdoor; ozone; person; plants; polytechnica; publishing; quality; rate; removal; room; source; table; technical; tvoc; university; value; ventilation; vol; waste
- versions: original; plain text
- ap-326
- author: Usama, S.; Šimák, B.
- title: A Low-complexity Wavelet Based Algorithm for Inter-frame Image Prediction
- date: 2002-01-02
- words: 2851
- flesch: 61
- summary: The results show that MRVBS is usually better than the FS and TSS algorithms, especially with slow motion video sequences. One family of fast block motion estimation algorithms relies on the idea of predicting the approximate large-scale motion vectors in the coarse-resolution video and refining the prediction motion vectors to find the final values.
- keywords: algorithm; america; better; block; central; comparison; dbs; estimation; fig; frame; gaussian; image; influence; layer; miss; mixed; motion; mrvbs; multi; new; noise; performance; process; psnr; resolution; results; search; sequence; simulation; size; tss; video; vol; wavelet
- versions: original; plain text
- ap-3260
- author: Opatřil, Jan; Havlík, Jan; Bartoš, Ondřej; Dlouhý, Tomáš
- title: AN EXPERIMENTAL ASSESSMENT OF THE PLATE HEAT EXCHANGER CHARACTERISTICS BY WILSON PLOT METHOD
- date: 2016-10-31
- words: 4466
- flesch: 64
- summary: Keywords: plate heat exchanger; Wilson plot; experimental measurement; heat transfer; pressure drop; friction factor. (2) In single phase fluid flow heat transfer, generally, Nu is represented by a pragmatic expression such as the one given in (3).
- keywords: boiler; chevron; coefficient; cold; convection; data; dependence; different; dimpel; evaluation; exchanger; experimental; figure; flow; fluid; heat; heat exchanger; heat transfer; hot; international; jan; linear; loop; measured; measurement; method; number; ohtc; parameters; performance; phe; plate; plate heat; plot; plot method; pressure; rate; regression; table; temperature; thermal; transfer; tubular; values; water; wilson
- versions: original; plain text
- ap-3265
- author: Kalnins, Ernest G.; Miller, Jr, Willard; Subag, Eyal
- title: LAPLACE EQUATIONS, CONFORMAL SUPERINTEGRABILITY AND BÔCHER CONTRACTIONS
- date: 2016-06-30
- words: 7490
- flesch: 64
- summary: There is a similar definition of ordinary Stäckel transforms of Helmholtz superintegrable systems HΨ = EΨ which takes superintegrable systems to superintegrable systems, essentially preserving the quadratic algebra structure • All the 2nd order superintegrable systems are limit- ing cases of a single system: the generic 3-parameter potential on the 2-sphere, S9 in our listing [13], or are obtained from these limits by a Stäckel trans- form (an invertible structure preserving mapping of superintegrable systems
- keywords: 2nd; algebra; basis; bôcher; classical; classification; complex; conformal; constant; contractions; coordinates; curvature; dimensional; equations; flat; free; functions; hamiltonian; helmholtz; ix4)2; kalnins; koenigs; laplace; lie; limits; math; miller; nondegenerate; order; parameter; phys; post; potential; quadratic; quantum; second; separable; so(4,c; space; sphere; structure; stäckel; superintegrability; superintegrable; superintegrable systems; symmetries; symmetry; systems; theorem; transform; v[1,1,1,1; v[2,1,1; v[2,2; v[3,1; v[4; x22
- versions: original; plain text
- ap-3266
- author: Pospíšil, Jiří; Lisý, Martin; Špiláček, Michal
- title: OPTIMALIZATION OF AFTERBURNER CHANNEL IN BIOMASS BOILER USING CFD ANALYSIS
- date: 2016-10-31
- words: 3830
- flesch: 53
- summary: The values of kinetic energy of turbulence obtained from the carried out parametrical study are presented in Figure 6. Kinetic energy of turbulence generally increases with increasing velocity of flue gas flow. Left of each subfigure: highest concentrations – section plan view; right: concentration in the cut – view in the direction of flue gas flow.
- keywords: air; biomass; boiler; chamber; channel; combustion; concentration; conditions; cross; cross section; cut; diameter; distribution; duct; energy; figure; flow; flue gas; free; fuel; gas; gas duct; gas flow; increase; kinetic; local; maximum; minimum; mixing; option; orifice; parametrical; pipe; pressure; reduction; secondary; secondary air; section; study; temperature; trace gas; turbulence; velocity
- versions: original; plain text
- ap-328
- author: Haghi, A. K.
- title: A Mathematical Approach for Evaluation of Surface Topography Parameters
- date: 2002-01-02
- words: 3104
- flesch: 66
- summary: The correlation function (5) can be represented as [3]: � � � � � � � �� � K x x y y C x y C x y n G n n n 1 2 1 2 1 1 1 1 1 2 1 2 1 , , , , , , ! � � � � �� � � � � � (6) � � � � � � � � C x y G h The following notation is now used: � � � �S K KK GG G d d� �� �� 1 0 0 1 2 1 2 00 , ,� � � � (14) with L L SK1 2!
- keywords: component; deterministic; equation; mathematical; parameter �; random; s x; surface; transformation; x y; y s; y y; y �; � exp; � g; � k; � ras; � s; � �
- versions: original; plain text
- ap-330
- author: Tesař, V.
- title: Sampling by Fluidics and Microfluidics
- date: 2002-01-02
- words: 6098
- flesch: 61
- summary: A similar tree- -like connection principle at higher levels is applied to build sampling units for a larger number of sample flows. This would, of course, also apply if there were more valve pairs in a sampling unit handling a larger number of sample flows.
- keywords: acta; analyser; attachment; case; channels; chemical; circuit; cleaning; closed; collector; control; control flow; czech; diagram; difference; driving; effect; elements; example; fig; flow; fluidic; guard; high; house; http://ctn.cvut.cz/ap/; interaction; jet; junction; large; main; microfluidic; nozzle; number; open; operating; opposite; output; polytechnica; pressure; publishing; pump; pumping; pyv; reactors; required; reverse; reynolds; sample; sample flow; sampling; schematic; single; small; state; supply; technical; terminals; tesař; time; unit; university; valve; vent; vol
- versions: original; plain text
- ap-332
- author: Rieger, F.; Rzyski, E.
- title: Mixing Suspensions in Slender Tanks
- date: 2002-01-02
- words: 3183
- flesch: 63
- summary: 2 Experimental Experiments were carried out in a cylindrical flat-bot- tomed (glass) tank of diameter D � 0.2 m, filled with a liquid to a height of H � D or H � 2D. In the tank there were four standard baffles and a pitched four-blade impeller (� � 45°). 54 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 42 No. 2/2002 500 750 1000 1250 0.5 0.6 0.7 0.8 0.9 1 2 3 4 5 three impellers one impeller two impellers l 0.5·� d l 0.5·� d l 0.5·� d l 0.5·� d l � d l � d l � d l 1.5·� d l 1.5·� d four impellers five impellers � n [min ] �1 Fig. 13: Relative standard deviation of suspension concentration (particles � � 1.34 mm) in the tank H � 2 D 0 0.05 0.10 0.15 1 10 one impeller two impellers, l = 1.5·d three impellers, l = 1.5·d four impellers, l = ·d five impellers, l = 0.5·d � �s Fig.
- keywords: concentration; deviation; different; distance; distribution; fig; frequency; height; homogeneity; impellers; liquid; min; mixing; number; particles; power; relative; rotation; solid; standard; suspension; tank
- versions: original; plain text
- ap-334
- author: Grünwald, A.; Šťastný, B.; Slavíčková, K.; Slavíček, M.
- title: Formation of Haloforms during Chlorination of Natural Waters
- date: 2002-01-02
- words: 2208
- flesch: 62
- summary: Among all the different parameters for characterizing NOM of given water, UV254 and specific ultraviolet absorbance (SUVA� � UV�/DOC) at a particular wavelength (�) has often correlated well with DBP formation [7]. This paper deals with the formation potencial of disinfection by-products in water samples taken from different places in the Flaje catchment.
- keywords: acid; chlorine; concentration; czech; dbps; disinfection; doc; fig; flaje; formation; haafp; haas; humic; matter; natural; nom; organic; parameters; potential; potok; products; radní; samples; sampling; stream; tab; thmfp; thms; university; vol; water
- versions: original; plain text
- ap-336
- author: Kreidl, M.; Houfek, P.
- title: Reducing Ultrasonic Signal Noise by Algorithms based on Wavelet Thresholding
- date: 2002-01-02
- words: 3104
- flesch: 60
- summary: The coefficient of noise reduction �SN was defined for a comparison of the success of the used algorithms, according to Eq. 60 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 42 No. 2/2002 Reducing Ultrasonic Signal Noise by Algorithms based on Wavelet Thresholding M. Kreidl, P. Houfek Traditional techniques for reducing ultrasonic signal noise are based on the optimum frequency of an acoustic wave, ultrasonic probe construction and low-noise electronic circuits.
- keywords: -10; algorithm; analysis; bior; coefficient; czech; decomposition; detail; different; echo; fig; level; maximum; methods; noise; noise reduction; nsr; optimum; reduction; results; signal; simulated; technical; threshold; thresholding; ultrasonic; university; value; vol; wavelet; waves
- versions: original; plain text
- ap-338
- author: Beran, V.
- title: Optimisation and Just-in-Time
- date: 2002-01-02
- words: 3361
- flesch: 61
- summary: Finishing processes in construction production are an appropriate place for practic- ing JIT methods. It is very probable that wherever construction work has been carried out at a loss or at a low profit, bad time and volume scheduling will have played a significant role in the bad economic results.
- keywords: acta; activities; capacity; conditions; construction; contract; costs; czech; deadlines; demand; execution; fig; fixed; house; http://ctn.cvut.cz/ap/; industry; jit; latest; low; management; minimum; optimisation; payments; polytechnica; possible; problem; production; project; publishing; risk; section; segment; solution; speed; technical; technological; time; total; university; vol; work
- versions: original; plain text
- ap-340
- author: Bednařík, M.; Koníček, P.; Červenka, M.
- title: Solution of the Burgers Equation in the Time Domain
- date: 2002-01-02
- words: 3678
- flesch: 69
- summary: (8) The integration itself can be performed by means of the Simpson method, which is based on approximating the inte- grated function in the segments by parts of a parabola � � � � � � � �f z z q q n f z f z f z q q d 1 2 2 1 0 1 2 3 4 2 � � � � � �� [ � � � � � � �� � �� �2 42 1f z f z f zn n n ], (9) where n � 2k, k N� is the number of equidistant intervals and � �z q i q q ni � � �1 2 1 . Homogeneous Burgers equation � � � � � � � � � � v x c v v b c v � � � 0 2 0 0 3 2 22 0, (1) here v is acoustic velocity, � is retarded time, � � �t x c0, where t is time, x is the distance from the sound source, c0 is the velocity of sound propagation in the linear approxima- tion, b is the dissipation coefficient, �0 is density of medium, � is nonlinearity coefficient.
- keywords: amplitude; burgers; burgers equation; case; domain; equation; f z; finite; function; integrand; method; nonlinear; number; plane; point; s y; s �; solution; sound; time; transformation; v y; vol; waves; y y; y z; y �; z s; � exp; � �
- versions: original; plain text
- ap-3408
- author: Mouralova, Katerina; Kovar, Jiri; Houska, Pavel
- title: EXPERIMENTAL EVALUATION OF WEDM MACHINED SURFACE WAVINESS
- date: 2016-10-31
- words: 3462
- flesch: 61
- summary: 4. Conclusions and discussion The morphology of sample surfaces is made up of a large number of craters which were formed by ero- sion process [15,16]. ZHR 4150AK hardness tester, series Rockwell by Zwick Roell was used for the measurement of hardness of sample material.
- keywords: 99.5; acta; advanced; alloy; average; current; discharge; doi:10.1007; electrical; evaluation; experimental; fig; figure; heat; high; individual; journal; machined; machining; manufacturing; material; maximum; measured; measurement; number; optimization; parameters; points; polytechnica; process; profile; results; samples; surface; technology; ti-6al-4v; titanium; treatment; values; waviness; wedm; wire
- versions: original; plain text
- ap-3411
- author: Gubbiotti, Giorgio; Levi, Decio; Scimiterna, Christian
- title: ON PARTIAL DIFFERENTIAL AND DIFFERENCE EQUATIONS WITH SYMMETRIES DEPENDING ON ARBITRARY FUNCTIONS
- date: 2016-06-30
- words: 5496
- flesch: 61
- summary: Startsev, Darboux integrable discrete equations possessing an autonomous first-order integral, J. Phys. In the following Section we will present some results on the construction of PDE’s presenting generalized symmetries depending on arbitrary functions and relate them to Darboux integrable equations.
- keywords: arbitrary; arbitrary functions; autonomous; case; characteristic; classification; darboux; difference; differential; direction; discrete; doi:10.1007; equation; factorizable; following; functions; generalized; generalized symmetries; generator; group; gubbiotti; infinitesimal; integrable; levi; lie; linearizable; liouville; math; n+1; nonlinear; operators; order; partial; pde; phys; point; present; p∆e; results; role; scimiterna; second; symmetries; symmetry; systems; theor; tm−1,n; v0,0; variables; winternitz
- versions: original; plain text
- ap-342
- author: Jahoda, M.; Machoň, V.; Vlach, L.; Fořt, I.
- title: Macro-instabilities of a Suspension in an Axially Agitated Mixing Tank
- date: 2002-01-03
- words: 3470
- flesch: 62
- summary: The dependence of the mean value of the dimensionless frequency of macro-instability occurrence on impeller speed for constant solid concentration 10 % by weight is shown in Fig. The dependence of the mean value of the dimensionless frequency of macro-instability occurrence on solid concentration for constant impeller speed is shown in Fig.
- keywords: axial; baffle; circulation; clearance; concentration; czech; diameter; dimensionless; edge; field; fig; flow; fořt; frequency; impeller; instabilities; loop; macro; mean; mixing; occurrence; origin; particles; region; solid; speed; stirred; stream; surface; suspension; value; velocity; vessel; vol; vortex; vortices
- versions: original; plain text
- ap-3436
- author: Vaněček, Jan; Štroner, Martin
- title: TESTING THE ACCURACY OF MEASURED VALUES IN CONTINUOUS LONG-TERM GEODETIC MONITORING
- date: 2016-12-31
- words: 6378
- flesch: 59
- summary: Important coefficients of approximation curves of horizontal direction standard deviations. Standard deviation of horizontal direction for all tested reference points.
- keywords: accuracy; acta; air; analysis; angle; approximation; approximation curve; automatic; average standard; calculated; calculated standard; calculation; case; changes; coefficient; comparison; curve; daily standard; days; deviations; difference; distance; fig; figure; function; geodetic; horizontal; horizontal direction; important; intervals; limit; linear; manufacturer; measured; measurements; mgon; monitoring; period; point; reference; reference point; results; size; slope; slope distance; standard deviation; station; system; table; temperature; testing; time; total; trend; values; zenith; zenith angle
- versions: original; plain text
- ap-3438
- author: Prorok, Amanda; Ani Hsieh, M.; Kumar, Vijay
- title: ADAPTIVE DISTRIBUTION OF A SWARM OF HETEROGENEOUS ROBOTS
- date: 2016-02-29
- words: 6524
- flesch: 64
- summary: As a consequence, we do not employ optimization methods that utilize final robot distributions in their formula- tions (which is the case in the works presented by [8] and [13]). Notation We consider a community of S robot species, with a total number of robots N, and N(s) robots per species such that ∑S s=1 N (s) =
- keywords: adaptive; capabilities; case; configuration; continuous; control; convergence; cost; derivative; distribution; fig; final; function; gradient; graph; heterogeneous; hsieh; initial; k(s; k(s)f; k(s)ij; kumar; large; matrix; max; method; microscopic; model; multiple; nodes; number; objective; optimal; optimization; present; problem; q(s; random; rank(q; rates; real; respect; results; robot; robot distribution; robotics; s)τ; set; sites; species; state; steady; swarm; system; tasks; time; trait; trait distribution; transition; values; v−1; work; ∂ek
- versions: original; plain text
- ap-344
- author: Teplý, B.
- title: Modelling of Deterioration Effects on Concrete Structures
- date: 2002-01-03
- words: 3973
- flesch: 59
- summary: Then the following inequality should be satisfied: � � � �Z R S R X X X S Y Y Yn m� � � � �1 2 1 2, , , , , ,� � 0 2: Two periods of structural service life If [Cl � (aq)]cr indicates the diffusion coefficient of Cl � in the aqueous phase (mol/m3) required for the depassivation of steel bars (a critical value), and cc is the concrete cover (mm), then time tcr (years) to depassivation is given by: � �� � � � � �� � t c D cr c e � � � � � � � Cl solid Cl aq Cl sat Cl 1000 31536 10 2 1 2 7 0 .
- keywords: acta; analysis; basic; carbonation; chloride; cl �; co2; concentration; concrete; corrosion; czech; depth; deterioration; effects; environmental; failure; fig; function; life; limit; model; performance; pitting; polytechnica; prediction; probabilistic; probability; process; random; reinforcement; safety; sensitivity; service; statistical; steel; structures; technical; time; university; value; variables; vol
- versions: original; plain text
- ap-3440
- author: Mendes Filho, José M.; Lucet, Eric
- title: MULTI-ROBOT MOTION PLANNING: A MODIFIED RECEDING HORIZON APPROACH FOR REACHING GOAL STATES
- date: 2016-02-29
- words: 5644
- flesch: 57
- summary: The planned initial configuration and initial input for robot Rb must be equal to the initial configuration and initial input of Rb: q∗b (tinit) = qb,init, (2) u∗b (tinit) = ub,init. The planned final configuration and the final input for robot Rb must be equal to the goal configuration and the goal input for Rb: q∗b (tfinal) = qb,goal, (4) u∗b (tfinal) = ub,goal.
- keywords: account; algorithm; approach; collision; communication; computation; configuration; constraints; cost; d(rb; detection; distance; environment; figure; flat; following; function; goal; horizon; impact; initial; input; mct; method; mobile; motion; motion planning; multi; need; new; number; obstacle; optimization; order; output; parameters; penetration; planning; problem; q∗b; radius; robot; set; solution; states; step; system; team; termination; time; trajectories; trajectory; travel; values
- versions: original; plain text
- ap-3441
- author: Genter, Katie; Stone, Peter
- title: AD HOC TEAMWORK BEHAVIORS FOR INFLUENCING A FLOCK
- date: 2016-02-29
- words: 6675
- flesch: 53
- summary: Hence, as can be seen in Figure 4, flocks with higher percentages of influencing agents will, on average, converge to θ∗ in a smaller number of time steps than flocks with lower percentages of influencing agents. Additionally, even when a pair of influencing agents shared one or more neighbors, these influencing agents often behaved similarly, and hence did not exert significantly different types of influence.
- keywords: agent; agent orientation; algorithm; behavior; bestdiff; bestorient; better; converge; coordinated; diff; direction; experimental; figure; flock; flocking; heading; iaorient; influence; line; lookahead; lookahead behavior; neighborhood; neighbors; norient; numagents; numangles; number; orientation; paper; partner; possible; results; section; set; size; step; step lookahead; teamwork; time; time step; vector; velocity; work
- versions: original; plain text
- ap-3453
- author: Kawohl, Anne Katherine; Lange, Jörg
- title: TESTS ON 10.9 BOLTS UNDER COMBINED TENSION AND SHEAR
- date: 2016-04-30
- words: 3836
- flesch: 69
- summary: The above-mentioned reduction factors for bolt strength at elevated temperatures are based on an extensive series of tests by Kirby [4] on bolts of property class 8.8. [10], where tension tests on bolts were performed by applying compression to the test rig, with the use of different angles as in the test rigs used by Renner
- keywords: angle; bearing; behaviour; bolts; class; combination; combined; connection; elevated; factors; failure; figure; fire; gonzález; high; load; performance; post; property; pure; reduction; results; rig; rigs; shear; steel; strength; temperature; tensile; tension; tested; tests
- versions: original; plain text
- ap-3454
- author: Lišková, Anna; Lacková, Petra; Mihaliková, Mária; Kočiško, Róbert
- title: IMPACT OF PLASTIC DEFORMATION ON THE PROPERTIES OF A SELECTED ALUMINIUM ALLOY
- date: 2016-10-31
- words: 3788
- flesch: 57
- summary: This paper reports on an experiment to assess the influence of plastic deformation on the microstructure and properties of EN AW 6012 (AlMgSiPb) aluminium alloy in two states. Keywords: intensive plastic deformation; aluminium alloy; tensile test.
- keywords: acta; ageing; alloy; aluminium; aluminium alloy; angular; channel; cutting; deformation; doi:10.1016; ecap; engineering; equal; figure; fracture; free; hardness; heat; initial; intensive; lead; materials; mechanical; microstructure; particles; plastic; plastic deformation; polytechnica; post; precipitation; pressing; process; properties; science; section; solution; specimen; state; strength; surface; tensile; test; treatment
- versions: original; plain text
- ap-3455
- author: Quan, Guan; Huang, Shan-Shan; Burgess, Ian
- title: PARAMETRIC STUDIES ON THE COMPONENT-BASED APPROACH TO MODELLING BEAM BOTTOM FLANGE BUCKLING AT ELEVATED TEMPERATURES
- date: 2016-04-30
- words: 5865
- flesch: 68
- summary: The Cardington fire tests [4] indicated that beam- web shear buckling, as well as beam bottom-flange buckling, near to the ends of steel beams, is very prevalent under fire conditions, as shown in Fig. Conclusions This paper has briefly reviewed an analytical model proposed to predict the post-buckling behaviour of the end-zones of steel beams at elevated temperatures.
- keywords: abaqus; analytical; analytical model; beam; behaviour; buckling; buckling fig; cantilever; comparisons; component; contraflexure; deflection; development; dharma; element; end; fig; finite; fire; flange; flange buckling; force; length; lines; load; loading; model; modelling; panel; plastic; point; post; proposed; relationship; shear; shear buckling; steel; structural; temperatures; thickness; vertical; web; work; zone
- versions: original; plain text
- ap-3457
- author: Háková, Lenka; Hrivnák, Jiří; Motlochová, Lenka
- title: ON CUBATURE RULES ASSOCIATED TO WEYL GROUP ORBIT FUNCTIONS
- date: 2016-06-30
- words: 7271
- flesch: 72
- summary: Keywords: Weyl group orbit functions; Jacobi polynomials; cubature formulas. Basic definitions This section reviews the basic concepts and notation from the theory of root systems, Weyl groups and Weyl group orbit functions.
- keywords: acta; algebra; basis; btλ; case; chebyshev; choice; clenshaw; coefficients; corresponding; cubature; cubature formulas; curtis; degree; domain; dual; exact; families; figure; following; formulas; functions; fundamental; group; hrivnák; integral; integration; itm; jacobi; lie; math; method; motlochová; negative; non; numerical; orbit; orbit functions; orthogonal; p(λ; patera; points; polynomials; polytechnica; region; roots; rules; section; set; simple; special; ssλ+%s; systems; t =; triangle; values; variables; weight; weyl; weyl group; |stabw; λ1,λ2; ∈{0
- versions: original; plain text
- ap-346
- author: Jokl, M. V.
- title: The Danger of Toxic Substances
- date: 2002-01-03
- words: 6190
- flesch: 59
- summary: Exhaust fumes from diesel engines produce in addition to NOx and other toxic agents, 3-nitrobenzatrone, which is the most carcinogenic agent discovered so far. Indoor ozone concentration is usually about a half of the outdoor ozone concentration.
- keywords: + +; acid; acta; admissible; agents; air; atmosphere; breathing; building; carbon; coal; combustion; concentration; czech; dangerous; decay; decrease; dioxide; eco; energy; engines; fig; formaldehyde; gases; harmful; health; higher; hours; human; hydrocarbons; impact; increase; indoor; interior; jokl; kwh; lower; lungs; materials; minutes; monoxide; nitrogen; non; oil; organic; organism; outdoor; oxides; oxygen; ozone; plants; pollution; polytechnica; ppb; quality; research; result; room; smog; smoke; smoking; source; substances; sulfur; table; technical; teflon; time; tobacco; toxic; toxic substances; university; use; value; ventilation; vol; year
- versions: original; plain text
- ap-3470
- author: Vrána, Tomáš; Bradáč, Josef; Kovanda, Jan
- title: ELASTO-KINEMATIC COMPUTATIONAL MODEL OF SUSPENSION WITH FLEXIBLE SUPPORTING ELEMENTS
- date: 2016-04-30
- words: 5388
- flesch: 56
- summary: doi:10.1007/978-94-007-5404-1. 155 http://dx.doi.org/10.1007/978-3-658-05068-9 http://dx.doi.org/10.1007/978-3-540-68553-1 http://dx.doi.org/10.1016/S0168-874X(98)00070-5 http://dx.doi.org/10.1007/978-3-540-89315-8 http://dx.doi.org/10.1016/j.mechmachtheory.2005.11.003 http://dx.doi.org/10.1115/1.2826715 http://dx.doi.org/10.1243/095440703322114915 http://www.altairuniversity.com/14225-practical-aspects-of-multi-body-simulation-with-hyperworks-free-book/ http://www.altairuniversity.com/14225-practical-aspects-of-multi-body-simulation-with-hyperworks-free-book/ http://www.altairuniversity.com/14225-practical-aspects-of-multi-body-simulation-with-hyperworks-free-book/ http://dx.doi.org/10.1007/978-94-017-0287-4 http://www.altairhyperworks.com/ClientCenterHWTutorialDownload.aspx http://www.altairhyperworks.com/ClientCenterHWTutorialDownload.aspx http://dx.doi.org/10.1007/978-94-007-5404-1 Acta Polytechnica 56(2):147–155, 2016 1 Introduction 2 MBS model in HyperWorks 3 MBS computational model of independent suspension 3.1 Creation of MBS model 3.2 Flexible models of suspension supporting elements 3.3 Creation of interface nodes 4 Simulations computations 5 Validation of MBS model 5.1 Validation of inertia moments of suspension supporting elements 5.2 Experimental measurement 6 Results and discussion 6.1 Effect of supporting elements flexibility during wheel vertical motion 6.2 Effect of supporting elements flexibility during action of side force 6.3 Effect of supporting elements flexibility during action of longitudinal force 7 Conclusion References Vehicle dynamics simulations with coupled multibody and finite element models.
- keywords: account; action; angle; arms; bushings; calculated; camber; change; characteristics; computational; effect; elast+flex; elasto; elements; equations; experimental; f(dz; fem; figure; flexibility; flexible; flexible model; force; help; hyperworks; independent; inertia; kinematic; knuckle; load; longitudinal; mbs; mbs model; measurement; mechanism; metal; method; model; natural; nodes; number; parameters; properties; rbe2; results; rigid; rod; rubber; subframe; suspension; system; toe; transverse; values; vehicle; vertical; wheel
- versions: original; plain text
- ap-348
- author: Kreidl, M.; Houfek, P.
- title: Using the Correlation Function in Ultrasonic Non-destructive Testing
- date: 2002-01-03
- words: 2380
- flesch: 66
- summary: 3: Relationship between noise reduction coefficient �SN of the synthetic signal x(nTv) with the noise ratio SNR � 21 dB, frequencies f and damping coefficients � of the simulated ultrasonic impulse defined by Eq. � ��SN dBef2 ef2 ef1 ef1 � � � � � �20 log U N U N , (5) where Nef1 RMS value of the additive noise in the signal, Nef2 RMS value of noise included in the signal after application in a given algorithm, Uef1 RMS value of the ultrasonic signal, e.g., cor- responding to the flaw echo in the measured signal, Uef2 RMS value of the ultrasonic signal, when applying the tested algorithm.
- keywords: algorithms; coefficient; correlation; cross; echo; fig; flaw; frequency; function; impulse; mhz; noise; ntv; optimum; parameters; real; reduction; signal; simulated; snr; ultrasonic; value
- versions: original; plain text
- ap-3483
- author: Grundland, Alfred Michel; Levi, Decio; Martina, Luigi
- title: ON IMMERSION FORMULAS FOR SOLITON SURFACES
- date: 2016-06-30
- words: 9351
- flesch: 71
- summary: = ϕk − ξαukα, (2.4) where the operators DJ correspond to multiple total derivatives, each of which is a combination of total derivatives of the form Dα = ∂α + ukJ,α ∂ ∂ukJ , α = 1, . . . ,p) and U (with coordinates uk, k = 1, . . .
- keywords: acta; algebra; associated; cambridge; compatibility; conformal; construction; corresponding; curvature; differential; dαf; equations; field; fokas; following; follows; formula; function; gauge; gel’fand; generalized; group; grundland; immersion; immersion formula; independent; infinitesimal; integrable; integrated; jet; levi; lie; lsp; martina; math; matrices; matrix; model; parameter; pdes; phys; polytechnica; problem; projectors; results; satisfy; section; sigma; soliton; soliton surfaces; solution; space; spectral; su(2)-valued; surfaces; symmetries; symmetry; system; tafel; tangent; terms; transformations; u(n; vector; vol; wavefunction; zcc; |z|2; |z|2)2; φ−1; ω[u; ωrφ
- versions: original; plain text
- ap-3487
- author: Sovják, Radoslav; Máca, Petr; Imlauf, Tomáš
- title: EFFECT OF FIBRE ASPECT RATIO AND FIBRE VOLUME FRACTION ON THE EFFECTIVE FRACTURE ENERGY OF ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE
- date: 2016-08-31
- words: 5467
- flesch: 61
- summary: Yoo et al. also reported that the compressive strength was somewhat independent from the fibre geometry. Yoo et al. tested UHPFRC up to 4 % of the fibre volume fraction, and the effective fracture energy values tended to increase as the fibre volume increased (Fig. 9).
- keywords: aspect; aspect ratio; beams; cement; compressive; concrete; content; doi:10.1016; effective; effective fracture; energy; engineering; et al; experimental; fiber; fibre; fibre aspect; fibre volume; fig; figure; fraction; fracture; fracture energy; high; impact; journal; linear; loading; material; measured; mixture; model; mpa; performance; properties; ratio; reference; results; sample; sovják; steel; strength; study; tensile; tested; uhpfrc; ultra; value; volume; yoo
- versions: original; plain text
- ap-3488
- author: Dong, Youwei; Rahmani, Ahmed
- title: FORMATION CONTROL OF MULTIPLE UNICYCLE-TYPE ROBOTS USING LIE GROUP
- date: 2016-02-29
- words: 6244
- flesch: 74
- summary: Lie algebra application to mobile robot control: a tutorial. Introduction The various ways to control and coordinate a group of mobile robots widely have been studied in recent years.
- keywords: acta; aij; algebra; angle; case; circle; communication; configuration; control; cos; directed; equation; exp; figure; formation; formation control; frame; global; graph; group; ḡi; initial; kinematic; law; lie; local; matrix; mobile; motion; multi; multiple; nonholonomic; origin; phase; polytechnica; position; problem; relative; results; robot; rotation; se(2; set; sgn; sin; so(2; system; tan; topology; type; unicycle; velocity; wheels
- versions: original; plain text
- ap-3493
- author: De Bie, Hendrik; Genest, Vincent Xavier; Lemay, Jean-Michel; Vinet, Luc
- title: A SUPERINTEGRABLE MODEL WITH REFLECTIONS ON S^3 AND THE RANK TWO BANNAI-ITO ALGEBRA
- date: 2016-06-30
- words: 3832
- flesch: 72
- summary: Recently, superintegrable models defined by Hamiltonians involving reflection operators have been the subject of several investigations The study of superintegrable models has proved fruitful in understanding symmetries and their algebraic description, and has also contributed to the theory of special functions.
- keywords: acta; algebra; bannai; dunkl; eigenfunctions; genest; hamiltonian; ito; i∈a; j1,j2,j3; math; model; operators; osp(1|2; phys; polynomials; polytechnica; quantum; rank; reflections; relations; s21+s; sigma; space; sphere; superalgebra; superintegrable; symmetries; symmetry; system; theor; v.x; vinet; zhedanov; ψ̃m
- versions: original; plain text
- ap-350
- author: Čepek, A.
- title: The GNU GaMa Project - Adjustment of Geodetic Networks
- date: 2002-01-03
- words: 3128
- flesch: 57
- summary: Our primary platform is GNU/Linux, and to help our users to use GaMa adjustment we have been run- ning a mail-server and a web interface (WebGaMa) based on the PHP scripting language. 2 About GNU GaMa The GaMa project (the acronym comes from Geodesy and Mapping) provides free software written in C++, released under the terms of the GNU General Public Licence
- keywords: academy; acta; adjustment; available; c++; cit; czech; data; design; development; direction; education; example; fig; format; foundation; free; future; gama; general; geodetic; gnu; house; http://ctn.cvut.cz/ap/; idea; inc; input; language; linux; matrix; model; networks; observation; point; polytechnica; project; publishing; rocinante; software; students; technical; university; virtual; vol; web; xml; čepek
- versions: original; plain text
- ap-3502
- author: Znojil, Miloslav
- title: IS PT-SYMMETRIC QUANTUM THEORY FALSE AS A FUNDAMENTAL THEORY?
- date: 2016-06-30
- words: 2722
- flesch: 57
- summary: [9] have developed PT -symmetric quantum theory as an extension of quantum theory to non-Hermitian Hamiltonians”) by some more appropriate outline of the history. By their opinion their results “essentially kill any hope of PT -symmetric quantum theory as a fundamental theory of nature”.
- keywords: -symmetric; bender; conclusions; evolution; false; fundamental; h(f; h(s; hamiltonian; hermiticity; hilbert; inner; lee; lett; locality; model; nature; non; paper; phys; physical; ptqm; quantum; quantum theory; rev; space; standard; theory; toy; unitary; znojil
- versions: original; plain text
- ap-3506
- author: Gazeau, Jean-Pierre
- title: COVARIANT INTEGRAL QUANTIZATIONS AND THEIR APPLICATIONS TO QUANTUM COSMOLOGY
- date: 2016-06-30
- words: 4851
- flesch: 58
- summary: Keywords: integral quantization; covariance; POVM; affine group; Weyl-Heisenberg group; coherent states; FRW model; smooth bouncing. In Section 5 we illustrate the method with recent applications to quantum cosmology where the initial singularity is regularized by using the affine integral quantization.
- keywords: acta; affine; applications; bergeron; bianchi; canonical; classical; coherent; complex; coset; cosmology; covariant; density; dynamics; dµ(g; example; f(q; functions; gazeau; group; half; heisenberg; hilbert; identity; integral; integral quantization; j.-p; like; line; map; mathematical; małkiewicz; measure; method; model; motion; operator; phase; phys; physical; plane; polytechnica; positive; povm; quantization; quantum; real; representation; rev; section; self; semi; sense; singularity; space; square; symmetry; uir; unitary; universe; weyl
- versions: original; plain text
- ap-3509
- author: Szajewska, Marzena; Tereszkiewicz, Agnieszka
- title: TWO-DIMENSIONAL HYBRIDS WITH MIXED BOUNDARY VALUE PROBLEMS
- date: 2016-06-30
- words: 4105
- flesch: 79
- summary: The recent discovery of new families of special functions, orthogonal on F , makes it possible to consider not only the Dirichlet or Neumann boundary value problems on F , but also the mixed boundary value problem which is a mixture of Dirichlet and Neumann type, ie. A surprising variety of recently emerged suitable new families of special functions makes that the realization of this idea is relatively simple and straightforward in any dimension.
- keywords: 2π2; basis; boundary; branching; case; condition; cos; dirichlet; families; figure; following; form; functions; fundamental; group; mixed; neumann; normal; problems; region; section; separation; sin; sla; special; ssa; szajewska; table; value; weyl
- versions: original; plain text
- ap-3511
- author: Háková, Lenka; Tereszkiewicz, Agnieszka
- title: ON GENERALIZATION OF SPECIAL FUNCTIONS RELATED TO WEYL GROUPS
- date: 2016-12-31
- words: 4554
- flesch: 74
- summary: Weyl group orbit functions are defined in the context of Weyl groups of simple Lie algebras. Weyl group orbit functions The standard way of defining four families of orbit functions uses the concept of sign homomorphisms, i.e., mappings σ :
- keywords: algebras; character; character functions; continuous; corresponding; discrete; domain; families; finite; following; functions; generalization; groups; homomorphisms; irreducible; jiří; linear; orbit; orthogonality; paper; patera; properties; rank; related; respect; roots; simple; special; theorem; weyl; weyl groups; w∈w; w∈w(a3; λ,µ; −1 −1
- versions: original; plain text
- ap-3517
- author: Hrivnak, Jiri; Motlochova, Lenka
- title: ON CONNECTING WEYL-ORBIT FUNCTIONS TO JACOBI POLYNOMIALS AND MULTIVARIATE (ANTI)SYMMETRIC TRIGONOMETRIC FUNCTIONS
- date: 2016-08-31
- words: 5374
- flesch: 68
- summary: [6] L. Háková, J. Hrivnák, J. Patera, Four families of Weyl group orbit functions of B3 and C3, J. Math. Formulas for connection between the four types of orbit functions of Bn or Cn and the (anti)symmetric multivariate cosine and sine functions are explicitly derived.
- keywords: a2)b2; algebras; antisymmetric; case; chebyshev; connection; constant; corresponding; cosine; discrete; formulas; functions; generalizations; groups; hrivnák; jacobi; k=1; lie; math; motlochová; multivariate; orbit; orbit functions; orthogonal; orthogonality; patera; phys; polynomials; roots; simple; sin; special; symmetric; trigonometric; variables; weyl; |stabw; π(k1; σ∈sn
- versions: original; plain text
- ap-352
- author: Novák, M.; Faber, J.; Votruba, Z.; Přenosil, V.; Tichý, T.; Svoboda, P.; Tatarinov, V.
- title: Reliability of Human Subject - Artificial System Interactions
- date: 2002-01-03
- words: 7188
- flesch: 50
- summary: All these factors combine, with the result that the reliability of human subject – artificial system interaction is limited, above all from the human side. The price that we all pay for insufficiently reliable hu- man – artificial system interaction (above all from the human side) is tremendous.
- keywords: acceptable; acta; activity; analysis; approach; artificial; artificial system; attention; basis; case; certain; closed; control; correct; course; czech; dangerous; decrease; demands; drivers; eeg; efficiency; example; eyes; factors; fast; fig; general; high; house; http://ctn.cvut.cz/ap/; human; human operator; human subject; important; information; interaction; level; life; long; measurements; mental; methods; micro; neural; operation; operator; organism; parameters; polytechnica; probability; problem; pseudo; publishing; reaction; real; region; reliability; results; set; signals; sleep; spectral; state; subject; system; system interaction; technical; time; university; values; vigilance; vol
- versions: original; plain text
- ap-3521
- author: Med, Michal; Souček, Petr
- title: ANALYSIS AND IMPLEMENTATION OF APPLICATION SCHEMAS FOR THE INSPIRE BUILDINGS THEME
- date: 2016-08-31
- words: 6459
- flesch: 53
- summary: The Joint Research Center publishes XML schemas for INSPIRE application schemas on its web page http://inspire.ec.europa.eu/schemas/. For the Buildings theme, only three application schemas have corresponding XML schemas that have already been published. The ways in which the data will be published are described in detail in the Tech- nical Guidance documents for the implementation of INSPIRE Network services.
- keywords: abstract; acta; application; application schemas; attribute; buildingpart; buildings; buildings theme; buildingsextended2d; cadastre; code; commission; content; czech; data; database; datasets; directive; document; download; elements; european; feature; figure; files; geometry; gml; guidance; implementation; information; inspire; inspire data; iskn; iso; isui; mapping; metadata; national; necessary; number; office; parts; point; polytechnica; portrayal; publication; republic; schemas; services; source; spatial; specification; standard; structure; surveying; technical; theme; transformation; type; use; version; view; web; xml; xml schemas
- versions: original; plain text
- ap-3524
- author: Levi, Decio; Rodriguez, Miguel A.
- title: ON THE CONSTRUCTION OF PARTIAL DIFFERENCE SCHEMES II: DISCRETE VARIABLES AND SCHWARZIAN LATTICES
- date: 2016-06-30
- words: 5973
- flesch: 64
- summary: + k0 xn,m, τn,m = k3 (32) which clearly do not satisfy (16). Our first choice for the difference scheme is an orthogonal cartesian lattice given, in the coordinates hn,m and σn,m by hyn,m = b, σ y n,m = 0, h x n,m = a, σ x n,m = 0, (29) where a and b are arbitrary constants, which in the continuous limit go to zero.
- keywords: 0,0; burgers; case; clairaut; construction; continuous; difference; differential; discrete; equation; exact; exponential; figure; group; h y; hyn; independent; invariant; lattice; levi; limit; m −σ; m+j; n+i; non; numerical; order; orthogonal; partial; phys; points; potential; results; schemes; schwarz; schwarzian; section; solutions; symmetries; symmetry; theorem; variables; winternitz; x n; y 0,0; y m; y n; young; σ y; −un
- versions: original; plain text
- ap-3537
- author: Likhonina, Raissa
- title: FINITE ELEMENT MODELLING AND SIMULATION OF VEHICLE IMPACT ON STEEL SAFETY BARRIERS
- date: 2016-12-31
- words: 4353
- flesch: 60
- summary: And the authors of such publications have come to a similar conclusion that FEA simulation is a very helpful tool for design and construction as well as for testing of crash barriers. Moreover, the calculation results can be used to design and test new and completely innovative types of crash barriers.
- keywords: acta; ansysr; barriers; calculations; comparison; construction; crash; crash tests; cylinder; czech; density; element; energy; fea; figure; finite; forces; impact; internal; jsam-2; jsnh4; knm; length; lower; manufacturer; mass; material; model; modelling; new; numerical; parameters; parts; polytechnica; real; results; road; safety; simulation; standards; steel; table; tb11; tb42; technical; tests; thickness; time; types; university; value; vehicle; workbenchtm
- versions: original; plain text
- ap-354
- author: Šulc, B.; Jan, J. A.
- title: Non Linear Modelling and Control of Hydraulic Actuators
- date: 2002-01-03
- words: 3905
- flesch: 65
- summary: (3) we obtain the equations � � � � � �� � � oil c c oil 1 oil d d d d p A x t V A x p p p t p Q Q 1 1 0 1 1 1 1 1 � � � � � , i � � � � � nt , i � � � � � � �� � � oil c c oil 2 oil d d d d p A x t V A x p p p t p Q 2 2 0 2 2 2 2 �nt � �Q Qext 2 (4) � � d d d d d d 1 oil c c 2 o p t p V A x Q A x t Q p t � � � 1 0 1 1 1 1 , int � � � �� � �� � � � il c ext c 2 d d p V A x Q Q A x t Q2 0 2 2 2 , int � � � � �� � �� (5) where � � � � Q C x p p p p x p p p p Q C 1 0 1 1 0 0 2 0 � � � � � � � � � ( ) ( sgn sgn sg sg s s s s 1 1 � � � � sg sg s 2 2 s s s x p p p p x p p p p sgn sgn ) � � � � � � � 0 0 2 2 (6) � � Q k p p Q k p int int , , � � � 1 2 2 2 2ext ext where coefficients kint and kext, 2 can be evaluated by means of the general formula by [12] k d r r L C Q p leak i c c 3 N N 6 � �� � � � � � � � 2 0 5 0 . We used the logical operator OR with max function as given below: �y x x� �max , ,1 2 In our case we had one output and five rules.
- keywords: actuator; control; controller; cylinder; czech; differential; error; fig; flc; friction; function; fuzzy; gaussian; hydraulic; int; isbn; linear; logic; matlab; membership; model; modelling; oil; output; p p; parameters; piston; position; sigmoid; simulink; spool; time; values; valve; variables; velocity; vol; windup
- versions: original; plain text
- ap-3555
- author: Senk, Josef; Jakubova, Ivana; Laznickova, Ilona
- title: ANALYSIS OF INTENSIVELY BLASTED ELECTRIC ARC BURNING IN THE ARC HEATER'S ANODE CHANNEL
- date: 2016-10-31
- words: 4239
- flesch: 61
- summary: (6) Solving the equation system in the mash step by step gives axial dependences of arc temperature TA(z), electric field intensity E(z), Mach number Ma(z), power loss Pl(z), voltage UA(z) and finally, at the end, the total arc voltage UA(zL) and Pl(zL) as sums of individual increments. As could be expected, for higher arc currents, the conditions for the arc burning are built in a closer vicinity of the cathode and the arc temperature is higher.
- keywords: anode; anode channel; anode spot; arc; arc radius; arc temperature; arc voltage; argon; argon flow; cathode; channel; corresponding; cross; current; data; different; drop; electric; electric arc; figure; flow; gas; heater; higher; input; loss; measured; model; near; power; power loss; radius; rate; regions; section; spot; temperature; total; voltage
- versions: original; plain text
- ap-356
- author: Římal, J.
- title: Prague Loretto - Measurements of Moisture Content in Sculptural Group Material
- date: 2002-01-03
- words: 2312
- flesch: 51
- summary: This method facilitates monitoring of moisture distribution and, therefore, the condition of the sculptural group in a spatial perspective. Keywords: Prague Loretto, measurement of moisture fields, mass transport.
- keywords: acta; condition; content; copper; czech; distribution; effects; electrodes; group; house; http://ctn.cvut.cz/ap/; loretto; mass; measured; measurements; moistening; moisture; period; points; polytechnica; prague; rainfall; s u; sandstone; sculptural; sculptural group; structure; surface; technical; university; values; vol; water
- versions: original; plain text
- ap-358
- author: Římal, J.
- title: Measurement of Moisture Fields in the Bridge Structure of Charles Bridge
- date: 2002-01-03
- words: 2566
- flesch: 51
- summary: 3.2 Conditions for moisture field measurement It is necessary to make changes in temperature and moisture fields at the same measurement points and at equal time points, i.e. almost at the same time. Moisture field measurement cannot be performed without parallel temperature field measurement.
- keywords: acta; arch; bridge; bridge structure; changes; charles; charles bridge; clay; concrete; conditions; czech; field; graph; house; http://ctn.cvut.cz/ap/; material; measurement; methods; moisture; moisture field; pavement; point; polytechnica; prague; sensors; slab; structure; technical; temperature; time; university; vol; walls; water
- versions: original; plain text
- ap-360
- author: Hasal, P.; Kratěna, J.; Fořt, I.
- title: Frequency and Magnitude Analysis of the Macro-instability Related Component of the Tangential Force Affecting Radial Baffles in a Stirred Vessel
- date: 2002-01-03
- words: 6078
- flesch: 56
- summary: *, , ,� � �1 . The frequency of occurrence of macro-instability related force component is also analysed.
- keywords: acta; analysis; baffles; blade; blade impeller; chemical; clearance; component; czech; data; dimensionless; eigenmodes; engineering; experimental; fig; flow; fmi; force; fořt; frequency; glycerine; h h2; house; http://ctn.cvut.cz/ap/; impeller; instability; liquid; local; macro; magnitude; mean; measured; mixing; number; pattern; pod; polytechnica; power; publishing; radial; related; relative; rem; solution; standard; stirred; tangential; tangential force; target; technical; total; university; value; velocity; vessel; vol
- versions: original; plain text
- ap-362
- author: Dobrovská, D.; Andres, P.
- title: Technical Teachers and Technical Teacher Education - Research Results
- date: 2002-01-04
- words: 3015
- flesch: 48
- summary: 4/2002 4 Conclusions � to gain a “further qualification” or a “higher income” are leading motives for technical teachers to study teacher education, while ”interest” in pedagogical study is less common � most technical teachers have no previous experience with non-technical subjects � psychology is the most popular “human science” chosen by technical teachers � most of the respondents agree that technical teacher edu- cation should be obligatory; some have no opinion about the problem � a timetable involving one day weekly is acceptable for most respondents, but they are not in consensus about the desirable length of the programme (ranging from 1 to 4 semesters) � most technical teachers consider that e-learning is not quite suitable for technical teacher education � most also believe that technical university teachers should take some complementary teacher education courses � some subjects studied in technical teacher education are more popular or are felt to be more useful; others are less popular or considered less useful. yes 60 no 6 no opinion 32 other opinion 9 Fig. 11: Do you think technical teacher education should be ob- ligatory for technical university teachers? Subjects Present number of hours Frequency of deviations from the present number of hours (up to)
- keywords: answer; ctu; czech; education; engineering; fig; frequency; learning; motivation; non; obligatory; opinion; present; programme; qualification; respondents; school; semesters; studies; study; subjects; teacher; teaching; technical; time; university
- versions: original; plain text
- ap-364
- author: Červenka, M.; Bednařík, M.; Koníček, P.
- title: Temperature Effects in Acoustic Resonators
- date: 2002-01-04
- words: 3046
- flesch: 63
- summary: (10), applicable equations are derived from relations (8) and (9) � � � � � � � � � � � � � �p t ax x c t ax� �� � � � �� � � �� � � � � � 2 2 2 0 2 0� � � � � �� � � � � � � � � � � � � 2 0 2 0 2 2 0 1 4 3c t x a t c c p � � � � � � � d d � 2 01� � �� � � � � � � � ��� � � t ax , (11) � � � � � � � � � � � � �� � � � �� � � � � c t c ax c x0 2 0 0 2 0 0 2 0 2 2 � � � � � � � � � c c c c b c p p 0 2 0 2 0 4 3 2 0 3 0 4 0 1 2 1� � � �� �� � � � � � � � � �� � � �� � � � � � � � �� � � � � � � � � � � � � � � �� � �� 2 2 2 0 4 0 01 1 � � � � �� t x a t c d d � � �� � � � � � � �� � � � � � � � � � � � � � 2 21 2 1 �� � � �� �t ax c t axp � � � � � .
- keywords: account; acoustic; derivative �; distribution; e �; equation; fig; line; mean; model; resonator; temperature; vol; � b; � exp; � ij
- versions: original; plain text
- ap-366
- author: Bálek, R.; Šlegrová, Z.
- title: A Comparison of Acoustic Field Measurement by a Microphone and by an Optical Interferometric Probe
- date: 2002-01-04
- words: 2738
- flesch: 62
- summary: A z A A, sin sin� � � �0 1 1 1 0 2 2 2� � � � . t p t� � � �0 0 1 1 1 0 2 2 2sin sin , (7) or, more simply, � � � � � �� � �z z zt t t� �1 2 (8) � � � �� z izt k p t� 0 , (9) where piz(t) is the integral value of the acoustic pressure.
- keywords: acoustic; acoustic pressure; amplitudes; axis; buffer; diffraction; field; fig; frequency; generator; harmonic; integral; interaction; khz; laser; light; measured; measurement; microphone; nath; optical; piston; power; pressure; probe; radiator; raman; results; signal; table; theory; waves
- versions: original; plain text
- ap-368
- author: Koníček, P.; Bednařík, M.; Červenka, M.
- title: Propagation of Quasi-plane Nonlinear Waves in Tubes
- date: 2002-01-04
- words: 6252
- flesch: 67
- summary: The operators are defined for axisymmetric waves in the cylindrical coordinates by � � � � � � � � � � 2 2 2 2 1 z r r r , (3) � � �e ez r � � � �z r , (4) where z is the coordinate along the axis of the tube, r is the coordinate perpendicular to the axis of the tube, ez is the unit vector along the z axis and er is the unit vector along the r axis. (1) � � � � � � � �� � �� � 2 2 0 2 0 2 2 21 2t c t c t z � � � � � � � � � � � � � � � � � � � � � � � b c t O � � � � 0 0 2 3 3 ( ).
- keywords: acoust; acoustic; acta; amplitude; boundary; burgers; case; circular; component; condition; czech; distribution; duct; effects; equation; finite; frequency; harmonic; house; http://ctn.cvut.cz/ap/; khz; kzk; kzk equation; layer; longitudinal; means; method; nonlinear; numerical; order; plane; polytechnica; propagation; radius; soc; solution; sound; source; technical; transverse; tube; university; velocity; vol; waveguide; waves; � b; � v; � �
- versions: original; plain text
- ap-370
- author: Sýkora, M.
- title: Reliability Analysis of a Steel Frame
- date: 2002-01-04
- words: 5769
- flesch: 61
- summary: d G frame, k roof, k Q snow, k 0 w wind, k � � � � � � � � � � (1) � � � � M M M M M d G frame, k roof, k Q snow, k 0 w wind, k � � � � � � � � � � (2) where � � 0.85 is the reduction factor for permanent actions, �G � 1.35 is the partial factor for permanent actions, �Q � 1.5 is the partial factor for variable actions, and �0,w � 0.6 is the fac- tor for the combination value of the wind action. The design criterion for buckling without lateral-torsional buckling is expressed as: N A f C M W f Sd y, k M1 y my Sd, y p1, y y, k M1 k � � � �1 (6) where, in the critical cross-section of the column, NSd � 115 kN is the design value of the axial force due to the actions, � � 0.63 is the buckling coefficient (the lower of the values �y � 0.63 and �z � 0.80), A is the area of the relevant cross-section (AIPE330 � 6261 mm 2), fyk � 275 MPa is the characteristic value of the yield strength of the steel S275, �M1 � 1.1 is the partial factor for the material property, ky � 1.09 is the moment amplification factor, Cmy � 0.95 is the equivalent uniform moment factor, MSd,y � 132 kNm is the design value of the bending moment due to the actions and Wpl,y is the plastic sectional modulus ( Wpl, y, IPE330 � 804�10 3 mm3).
- keywords: actions; analysis; annual; area; axial; basic; bound; buckling; characteristic; coefficient; criterion; critical; cross; czech; design; extremes; factor; fig; force; frame; index; invariant; ipe; lateral; load; lower; model; parameters; pressure; probabilistic; reliability; reliability analysis; results; roof; section; sectional; snow; snow load; statistical; structural; time; torsional; value; variables; variant; wind; year
- versions: original; plain text
- ap-372
- author: Novák, J.
- title: Analysis of Phase Evaluation Algorithms in an Interferometric Method for Static Deformation Measurement
- date: 2002-01-04
- words: 5176
- flesch: 61
- summary: The resulting error of phase values �� is then given by � �� � � �� � �� � � , (14) where are the calculated phase values and �� are the original phase values. 42 No. 4/2002 A1: N � 3, � � � 4 tan , , , , , , , , �� � � � a b a b a b a b 12 3 2 3 2 12 12 12 3 2 3 2 A2: N � 3, � � � 2 � � � � tan , , , , , , , , , , �� � � � � � � a b b b a a a b a a 1 3 2 3 12 1 3 2 3 12 1 3 1 3 2 3 1� �� �2 2 3 12b b, ,� A3: N � 3, � � 2 3� � � � �� � tan , , , , , , , , , �� � � � � � � 3 3 3 2 12 1 3 3 2 12 1 3 3 2 3 2 12 a b b b a a a b a a� �� �1 3 12 1 3, , ,b b� A4: N � 5, � � � 2 � � � � � � tan , , , , , , , , , �� � � � � � � 2 2 4 3 1 3 5 2 4 3 1 3 5 3 1 3 5 3 1 3 b a a a b b a a b b� �, , ,5 2 4 2 44� a b A5: N � 5, � � � 2 � � tan , , , , , , , , �� � � � � � � �7 3 3 3 34 2 1 3 5 3 12 5 4 4 2 1 3 5 3a b b b b b a a a� �� � � � 12 5 4 4 2 4 2 1 3 5 3 12 5 4 1 3 549 3 3 3 3 , , , , , , , , , , � � � � � � a a b a a a a b b� �3 12 5 4� �b b, , A6: N � 7, � � � 2 � �� � � �� � tan , , , , , , , , �� � � � � � �7 4 4 7 4 4 4 3 5 17 4 2 4 6 3 5 17 4 2 4 6b b a a a a b b � �� � � �� �a a b b a a b b4 2 4 6 4 2 4 6 3 5 17 3 5 174 4 4 7 7, , , , , , , ,� � � � � A7: N � 7, � � � 3 � �� � � � tan , , , , , , , , , �� � � � � � � � �3 6 2 5 3 1 3 2 4 6 4 7 5 6 2 5 3 1 3a a b b b b b b a� �� � � �� � a a a a a b b a a a a 2 4 6 4 7 5 6 2 5 3 6 2 5 3 1 3 2 4 6 43 , , , , , , , , , , � � � � � � � �� �� �7 5 1 3 2 4 6 4 7 5, , , , ,b b b b� � � A8: N � 9, � � � 4 � �� � tan , , , , , , , , , �� � � � � � � � �b b b a a a a a a2 8 3 7 4 6 4 1 5 2 5 8 6 9 2 8 32 2� �� � � � 7 4 6 4 1 5 2 5 8 6 9 2 8 3 7 4 6 2 8 3 72 2 � � � � � � � a b b b b a a a b b , , , , , , , , , ,� � � �� �� � � � � � � �b a a a a b b b b4 6 4 1 5 2 5 8 6 9 4 1 5 2 5 8 6 9, , , , , , , , , A9: N �11, � � � 2 � � � �� � tan , , , , , , , �� � � � � � � �4 8 15 2 4111 9 3 5 7 2 4 10 8 6 4 6 8 1b b b a a a a a� � � �� �, , , , , , , , , 11 9 3 5 7 2 4 10 8 6 4 6 8 111 9 3 8 15 2 8 1 � � � � � � � a a b b b b a a� �� � � �� �5 8 15 16 25 7 111 9 3 5 7 2 4 10 8 6 4 6 8 2a b b b a a a a b, , , , , , , , ,� � � � � � � �� �4 10 8 6 4 6 82� � �b b b, , , Table 3 the fastest three-step and the slowest eleven-step algorithm is approximately 25 %.
- keywords: accuracy; algorithms; analysis; b b; beam; calculation; change; computing; czech; device; different; error; evaluation; factors; field; house; intensity; interference; measurement; measuring; method; model; number; object; optical; phase; phase calculation; process; publishing; random; shifting; step; systematic; technique; time; university; values; vol; wave; � tan
- versions: original; plain text
- ap-374
- author: Procházka, P. P.; Kugblenu, M. G.
- title: Certain Discrete Element Methods in Problems of Fracture Mechanics
- date: 2002-01-04
- words: 7679
- flesch: 65
- summary: x x n�ik i k 2 j jr �� � � � � � 2 where � � � � � � � �A M� � � � � � �� � �� � � � � � �4 2 3, , � �k x x r x x� � � � � �� � � �, , ,i i i 2 1 2 2 2 and � and � are Lame’s material constants. Let us introduce vectors �s, �s, s = 1, …, 6, and also u and p as: � � � � � � � � s s s s s s� � � � � � � � � u u p p 1 2 1 2 1 2 3 4 5 6 , , u � � � � � � � , p � � � � � � 1 2 3 4 5 6 � � � � , b b b b b b b 1 2 3 4 5 6 � � � �� �k s i s ik s k s i s ik s s s
- keywords: acta; adjacent; behavior; boundary; case; conditions; contact; czech; direction; discrete; disk; displacements; domain; elastic; element; equations; fig; forces; free; hexagonal; house; http://ctn.cvut.cz/ap/; ij ij; ij t; ji �; k k; k n; k t; k u; k �; material; matrix; method; n ij; nij; normal; paper; parameters; particles; point; polytechnica; problem; properties; publishing; rotation �; sin; solution; spring; stiffness; tangential; technical; tractions; tran; u u; u x; university; unknown �; vol; y ij; � cos; � j; � n; � s; � t; � tan; � y; � �
- versions: original; plain text
- ap-376
- author: Novák, J.
- title: New Phase Shifting Algorithms Insensitive to Linear Phase Shift Errors
- date: 2002-01-04
- words: 3294
- flesch: 66
- summary: The modelled function � �� �� that is shown in Fig. 1 expresses the obtained accuracy for arbitrary phase values �� and the chosen phase shift value �. Then according to the sign of the expressions we can de- termine the wrapped phase values � ��� � �W � , .
- keywords: accuracy; algorithms; analysis; calculation; computing; czech; detector; error; evaluation; house; intensity; interference; interferometric; measurement; methods; new; optical; phase; phase shift; publishing; shift; table; tan �; technique; time; values; vol
- versions: original; plain text
- ap-3770
- author: Jílková, Lenka; Hlinčík, Tomáš; Ciahotný, Karel
- title: DETERMINATION OF WATER CONTENT IN PYROLYTIC TARS USING COULOMETRIC KARL-FISHER TITRATION
- date: 2017-02-28
- words: 4150
- flesch: 58
- summary: [19] Hadaruga, D. I.; et al. Differentiation of rye and wheat flour as well as mixtures by using the kinetics of Karl Fischer water titration. Nano-encapsulation competitiveness of omega-3 fatty acids and correlations of thermal analysis and Karl Fischer water titration for European anchovy (Engraulis encrasicolus L.) oil/b-cyclodextrin complexes.
- keywords: anal; analysis; biomass; brown; cell; chem; coal; compounds; content; content determination; coulometric; determination; doi:10.1016; figure; fischer; fischer titration; food; g−1; iodine; karl; karl fischer; liquid; method; oil; organic; oven; phase; pyrolysis; pyrolytic; reaction; results; sample; solution; standard; suitable; tar; tars; temperature; titration; volumetric; water; water content; −−→
- versions: original; plain text
- ap-378
- author: Procházka, P. P.; Kugblenu, M. G.
- title: Application of Discrete Element Methods to the Problem of Rock Bumps
- date: 2002-01-04
- words: 4204
- flesch: 67
- summary: A summary is published in [7], where it is pointed out that at failure rocks with a wide range of strengths approximately satisfy the fol- lowing equation: � � � � � � � � � � � � � A 1 2 , where � and � are the shear and normal stresses along the failure plane, �� is the rock tensile strength (note that tension is positive), 2� is a universal constant equal to 0.684 ± correctional term, and A is a material constant. Keywords: free hexagonal element method, statical PFC, localized damage, occurrence of cracking and bumps during mining or tunneling.
- keywords: acta; bumps; case; coal; conditions; czech; discrete; element; emission; examples; experimental; face; fig; force; free; gas; hexagonal; house; http://ctn.cvut.cz/ap/; influence; kpa; loading; material; method; mining; model; movements; mpa; numerical; opening; particles; pfc; polytechnica; pressure; problems; publishing; results; rock; scale; seam; shear; stability; static; strength; technical; tensile; university; vol
- versions: original; plain text
- ap-3782
- author: Oyedoh, Eghe A.; Ekwonu, Michael C.
- title: EXPERIMENTAL INVESTIGATION ON CHROMIUM(VI) REMOVAL FROM AQUEOUS SOLUTION USING ACTIVATED CARBON RESORCINOL FORMALDEHYDE XEROGELS
- date: 2016-10-31
- words: 3742
- flesch: 54
- summary: Other functional groups may also be involved in metal ions adsorption. Adsorption isotherms Experimental data obtained from the batch tests were analyzed using the Langmuir and Freundlich isotherms to determine the isotherm model that described the experimental data more accurately.
- keywords: acrf; acta; adsorbent; adsorption; aqueous; carbon; chemical; chromium; chromium(vi; concentration; constant; contact; cr(vi; data; diffusion; doi:10.1016; effect; engineering; equilibrium; experimental; figure; fit; formaldehyde; freundlich; initial; ions; isotherm; journal; kinetics; langmuir; maximum; metal; min; order; parameters; ppm; process; pseudo; removal; resorcinol; results; second; solution; studies; surface; temperature; thermodynamics; time; value; water; xerogels
- versions: original; plain text
- ap-3794
- author: Masáková, Zuzana; Pelantová, Edita; Starosta, Štěpán
- title: ITINERARIES INDUCED BY EXCHANGE OF THREE INTERVALS
- date: 2016-12-31
- words: 8095
- flesch: 84
- summary: Codings of rotations are advantageously interpreted in the language of interval exchange. These cases belong to the most interesting from the combinatorial point of view, since they provide infor- mation about return words to factors, and about the morphisms preserving three interval exchange words.
- keywords: 3iet; cases; condition; definition; degenerate; distance; exchange; factors; gap; induced; infinite; interval; itineraries; language; lemma; lengths; non; pelantová; points; proof; proposition; r(x; return; set; substitution; theorem; times; transformation; words;
- versions: original; plain text
- ap-380
- author: Fořt, I.; Jirout, T.; Sperling, R.; Jambere, S.; Rieger, F.
- title: Study of Pumping Capacity of Pitched Blade Impellers
- date: 2002-01-04
- words: 3222
- flesch: 61
- summary: Three and six blade pitched blade impellers (the pitch angle varied within the interval � � �24°; 45°�) of impeller / vessel diameter ratio D/T � 0.36, as well as a three blade pitched blade impeller with folded blades of the same diameter, were tested. The laser (5 – W Ar ion, manufactured by Spectra Physics, © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 69 Acta Polytechnica Vol. 42 No. 4/2002 a/ b/ Fig. 2: Sketch of pitched blade impellers with three or six blades – Czech Standard CVS 691020 (a/ nB � 3: � � 24°, 35°, 45°, b/ nB � 6: � � 45°, h/D � 0.2) Fig. 3: Sketch of a pitched blade impeller with folded blades – Czech Standard CVS 691010 (nB � 3, s/D � 1.5, � � 67°, � � 25°, � � 48°, h/D � 0.2) Fig. 4: Layout of a laser Doppler anemometer with forward scatter mode USA) and optics were mounted on a bench which has a two-dimensional traversing mechanism.
- keywords: agitated; axial; blade; calculated; capacity; clearance; czech; diameter; dimensionless; discharge; efficiency; energetic; fig; flat; flow; hydraulic; impeller; liquid; mean; measured; number; power; pumping; quantity; radial; region; system; table; velocity; vessel; vol
- versions: original; plain text
- ap-3803
- author: Vannucchi de Camargo, Felipe; Marcos Guilherme, Carlos Eduardo; Fragassa, Cristiano; Pavlovic, Ana
- title: CYCLIC STRESS ANALYSIS OF POLYESTER, ARAMID, POLYETHYLENE AND LIQUID CRYSTAL POLYMER YARNS
- date: 2016-10-31
- words: 3589
- flesch: 54
- summary: Always supported by proper standard test- ing regulations for the scale chosen (i.e. fibre, strand, sub cable), the discovery of a constant or function that defines the change in fatigue resistance through the number of yarns associated on it, would be a great gain in applying the research to industry needs, once mathematical extrapolations could be constituted to predict, in the best case scenario, the behaviour of an actual gross rope. The loading rate was imposed as a percent- age of the specimen length: 50 % for AR (250 mm/min) and 100 % for other materials (500 mm/min)
- keywords: acta; amplitude; analysis; average; behaviour; breaking; conditions; creep; cycles; cyclic; density; endurance; experimental; fatigue; fibres; figure; fragassa; high; impact; lcp; linear; loading; materials; mechanical; mooring; number; oil; order; pet; polyester; polymer; polytechnica; preliminary; rate; resistance; results; ropes; scale; specimens; stress; synthetic; table; tensile; testing; tests; tex; trend; wear; work; yarns; ybl
- versions: original; plain text
- ap-3818
- author: Mendonça da Silveira, Francisco Eugenio
- title: TEARING MODES GROWTH RATE AMPLIFICATION DUE TO FINITE CURRENT RELAXATION
- date: 2017-02-28
- words: 4886
- flesch: 73
- summary: Therefore, magnetic field lines can break-up into thin filaments. [31] B. Coppi, J. M. Greene, J. L. Johnson.
- keywords: asymptotic; constant; current; density; dξ2; effects; electric; electron; equilibrium; field; finite; fluid; form; fusion; growth; ideal; inertial; islands; law; layer; limit; lines; magnetic; modes; number; perturbative; perturbed; phys; plasma; rate; relaxation; resistive; resistivity; scales; standard; theory; time; wavelengths; ψ(x
- versions: original; plain text
- ap-3885
- author: Kytyr, Daniel; Krčmářová, Nela; Šleichrt, Jan; Fíla, Tomáš; Koudelka, Petr; Gantar, Ana; Novak, Sasa
- title: DEFORMATION RESPONSE OF GELLAN GUM BASED BONE SCAFFOLD SUBJECTED TO UNIAXIAL QUASI-STATIC LOADING
- date: 2017-02-28
- words: 5295
- flesch: 66
- summary: Moreover, as the mechanical properties are significantly influenced by testing conditions the experiment was performed using dry samples and also using samples immersed in the simulated body fluid. Dimensions of pure GG samples for the compression test under dry conditions.
- keywords: acta; artificial; average; bag; bone; calculated; compression; compression test; conditions; content; curves; deformation; dimensions; dmax; dmin; dry; dry conditions; e s; elastic; engineering; experimental; figure; force; gellan; gg samples; gg00; gg50; gg70; gum; kpa; loading; low; material; measurement; mechanical; particles; polytechnica; properties; pure; pure gg; response; s s; sample e; samples; scaffold; strain; stress; stresses; table; tensile; tensile test; test; testing; tissue; wet; wet conditions; wt%; wt% bag; yield
- versions: original; plain text
- ap-3893
- author: Veselý, Jan
- title: NUMERICAL MODELLING OF THE SOIL BEHAVIOUR BY USING NEWLY DEVELOPED ADVANCED MATERIAL MODEL
- date: 2017-02-28
- words: 6285
- flesch: 63
- summary: This paper describes a theoretical background, implementation and validation of the newly developed Jardine plastic hardening-softening model (JPHS model), which can be used for numerical modelling of the soils behaviour. JPHS model — flow chart.
- keywords: acta; analysis; angle; behaviour; calculated; cam; cap; clay; coefficient; compression; concrete; conditions; coulomb; criterion; data; deviatoric; drucker; engineering; excavation; failure; figure; friction; function; geotechnical; ground; hardening; input; jardine; jphs; jphs model; kpa; laboratory; linear; lining; material; model; modelling; modulus; mohr; n+1; non; numerical; parameters; plastic; polytechnica; prager; pressure; real; region; results; settlement; sin; small; softening; soil; stiffness; strain; stress; surface; table; test; triaxial; tunnel; value; yield; young; φ′peak
- versions: original; plain text
- ap-3907
- author: Çelik, İsmet; Güneş, Ebubekir Can
- title: USE OF DISC SPRINGS IN A PELLET FUEL MACHINE FOR PRESSURE REGULATION AND PREVENTION OF DAMAGE
- date: 2017-05-02
- words: 4888
- flesch: 60
- summary: Keywords: biomass pellet; pellet machine; disc spring; Almen–Laszlo; FEA; pelletizing pressure. doi:0.1016/j.fuel.2009.03.015 [6] Mani, S., Tabil, L.G., Sokhansanj, S.: Effects of compressive force, particle size and moisture content on mechanical properties of biomass pellets from grasses, Biomass and Bioenergy, 30, 2006, p. 648–654.
- keywords: acta; addition; axis; biomass; calculated; conditions; cone; cylindrical; deformation; density; diameter; die; disc; disc springs; doi:10.1016; durability; effective; effects; energy; fea; feedstock; figure; force; friction; fuel; hertzian; high; increases; inner; lignin; machine; method; moisture; mpa; parallel; parameters; particle; pellet; pelletized; pelletizing; polytechnica; presses; pressure; process; production; quality; ratio; results; roller; sawdust; size; springs; straw; stress; study; surface; system; table; temperature; use; values
- versions: original; plain text
- ap-3908
- author: Kačur, Ján; Kostúr, Karol
- title: APPROACHES TO THE GAS CONTROL IN UCG
- date: 2017-06-30
- words: 13091
- flesch: 55
- summary: The control variable is the power frequency of the motor calculated by control system according to equation (33) and sent as an analog voltage signal (0–10 VDC) to the frequency inverter (see Figure 20). The outcome is a control system for the stabilization of oxidant to the gasifier, control system for the stabilization of the temperature in the gasifier and control system for the stabilization of the oxygen concentration in the produced gas.
- keywords: 3/2017; 4–20; acta; adaptation; air; air flow; algorithm; analysis; approaches; beat; bed; behaviour; calculated; calculation; calorific; calorific value; case; change; co2; coal; coal gasification; combustion; components; concentration; conditions; continuous; control; control loop; control system; control variable; controller; controller parameters; critical; dead; digital; discrete; discrete controller; e(k; energy; equation; error; exhaust; experimental; fan; feedback; figure; flow; following; form; frequency; function; gain; gas control; gases; gasification; gasification process; gasifier; higher; i.e.; identification; important; increases; injected; international; ján; karol; kačur; kostúr; level; loop; measured; measurement; method; mining; model; monitoring; new; number; opening; optimal; order; output; oxygen; parameters; percentage; period; pi controller; pid; plc; point; polytechnica; power; pressure; pressure control; process; process control; quality; radon; range; rate; reactions; reactor; regulation; sampling; seam; servo; set; stabilization; stabilizing; step; structure; suitable; syngas; system; temperature; temperature stabilization; time; transfer; u(k; ucg; ucg control; ucg process; underground; underground coal; use; value; variable; vol; y(k; zone
- versions: original; plain text
- ap-394
- author: Ficker, T.
- title: A Short Note on Non-isothermal Diffusion Models
- date: 2003-01-01
- words: 579
- flesch: 57
- summary: Naturally, throughout the year the structure is mostly exposed to non-isothermal states but, especially in the summer season, it may be subjected to a purely isothermal state. The DIAL and DRAL models provide the basic relations solely for non-isothermal conditions, i.e., they contain different tem- peratures ?
- keywords: acta; asymptotic; building; dial; dral; ficker; isothermal; models; non; polytechnica; relations; state; structure
- versions: original; plain text
- ap-3940
- author: Toman, Rastislav; Polóni, Marián; Chríbik, Andrej
- title: PRELIMINARY STUDY ON COMBUSTION AND OVERALL PARAMETERS OF SYNGAS FUEL MIXTURES FOR SPARK IGNITION COMBUSTION ENGINE
- date: 2017-02-28
- words: 7044
- flesch: 54
- summary: Other possibility is to employ the advanced predic- tive combustion models to model and study the ICE combustion process for different fuel mixtures [12]. Vibe curves and significant burning points for different fuel mixtures at constant spark advance and engine speed.
- keywords: acta; alternative; analysis; angle; burn; ca50; chríbik; combustion; combustion analysis; combustion engine; combustion model; comparison; composition; cycle; cylinder; data; different; duration; efficiency; empirical; engine; engine speed; error; experimental; figure; fuel; fuel mixtures; gaseous; group; hydrogen; ignition; inert; lgw; lhv; load; maximum; measured; measurement; mixtures; model; multiplier; natural; numerical; operating; optimal; optimization; overall; paper; parameters; performance; polytechnica; polóni; power; preliminary; pressure; process; rate; research; results; rpm; sae; scale; set; sg18; sg21; sg22; sg23; sg31; sg6; sgs; simulation; spark; speed; study; syngas; syngas mixtures; table; technical; torque; use; values; vibe; vol%; woschni
- versions: original; plain text
- ap-398
- author: Palamarchuk, D.; Zoriy, M.; Gurovič, J.; Černý, F.; Konvičková, S.; Hüttel, I.
- title: DLC Films Deposited by the DC PACVD Method
- date: 2003-01-01
- words: 979
- flesch: 62
- summary: The microhardness of the substrates and substrates with DLC films was measured using a Leica DM Inverter Research Mi..or.op for Materials Tesiing' The measurement results of microhardness for DLC layers prepared with the diflerent values of bias voltage are shown in Fig' This difference is shown in !ig' 3' 3.9.10-2 Torr3.9' l0-2 TorrInitial vacuum 7.1.10-l Torr7.1.10-l TorrPressure of CH, Bias current -400V+-900V-400V+-900V Thickness of DLC layer 27 Acta Polytechnica Vol.
- keywords: adhesion; bias; coatings; czech; deposition; dlc; fig; films; ing; layers; mail; method; microhardness; pacvd; phone; phys; plasma; poor; silicon; steel; substrates; vacuum; voltage
- versions: original; plain text
- ap-3980
- author: Sinuvasan, R; Krishnakumar, K; Tamizhmani, K M; Leach, PGL
- title: FURTHER GENERALISATIONS OF THE KUMMER-SCHWARZ EQUATION: ALGEBRAIC AND SINGULARITY PROPERTIES
- date: 2017-12-30
- words: 2338
- flesch: 63
- summary: We reported the symmetries, singularity properties and solutions for the members of the family. In [12] we delineated the properties of the class of equations (n−1)y(n−2)y(n)−n(y(n−1))2 = 0, n = 2, 3, . . .
- keywords: algebra; analysis; class; dimensional; equation; general; integrability; kummer; lie; order; properties; resonances; schwarz; singularity; symmetries; symmetry; terms; university; values; ∂ ∂x; ∂ ∂y
- versions: original; plain text
- ap-3988
- author: Sunu, Putu Wijaya; Rasta, I Made
- title: HEAT TRANSFER ENHANCEMENT AND PRESSURE DROP OF GROOVED ANNULUS OF DOUBLE PIPE HEAT EXCHANGER
- date: 2017-05-02
- words: 3277
- flesch: 67
- summary: Keywords: heat transfer; friction factor; circumferential rectangular grooves; annulus. The experiment apparatus was designed to determine the pressure drop, heat transfer and flow visualization.
- keywords: acta; annulus; capacity; characteristics; cold; diameter; double; double pipe; drop; effectiveness; enhancement; exchanger; experimental; factor; figure; flow; fluid; friction; grooves; heat; heat exchanger; heat transfer; hot; increase; investigation; mass; ntu; number; pipe; pipe heat; polytechnica; pressure; pressure drop; rate; ratio; room; smooth; sunu; surface; temperature; thermal; transfer; tube; turbulent
- versions: original; plain text
- ap-3989
- author: Beno, Matej; Patzák, Bořek
- title: FICTITIOUS DOMAIN METHOD FOR NUMERICAL SIMULATION OF INCOMPRESSIBLE VISCOUS FLOW AROUND RIGID BODIES
- date: 2017-09-01
- words: 3600
- flesch: 61
- summary: Keywords: finite element method; computational fluid dynamics; fictitious domain method; Lagrange multipliers; flow around obstacles. This article aims at reducing these compu- tational costs by avoiding the need of explicit repre- sentation of individual reinforcing bars by adopting an approach based on fictitious domain method to solve the problem of Newtonian incompressible flow with rigid body obstacles on regular, structured computa- tional grid, where the individual reinforcing bars can be inserted arbitrarily and independently of the un- derlying mesh.
- keywords: acta; body; boundary; computational; concrete; condition; constraints; different; discretization; domain; element; equations; fictitious; figure; finite; flow; fluid; incompressible; lagrange; method; multipliers; numerical; obstacles; operator; particle; points; problem; results; rigid; rings; sampling; selection; simulation; splitting; strategies; time; velocity; vol
- versions: original; plain text
- ap-4038
- author: Kolařík, Filip; Patzák, Bořek
- title: IMPLEMENTATION OF 3D VOF TRACKING ALGORITHM BASED ON BINARY SPACE-PARTITIONING
- date: 2017-05-02
- words: 7221
- flesch: 64
- summary: The interface is modeled using the Volume-Of-Fluid method, where the advection of volume fractions is treated by a purely geometrical method. The idea is to form a Taylor series expansion of volume fraction fT
- keywords: algorithm; binary; bsp; case; cell; child; coincident; column; computational; constant; convex; cube; determined; domain; element; end; faces; field; figure; finite; flow; fluid; fraction; free; function; grid; implementation; initial; interface; intersection; journal; lagrangian; lies; martin; material; mesh; method; moyce; negative; nodes; normal; numerical; order; original; partitioning; patzák; plane; polyhedron; position; positive; problem; procedure; reference; results; rotation; second; segment; set; shape; space; splitting; step; sub; surface; time; tracking; translation; tree; type; value; velocity; vof; volume; water
- versions: original; plain text
- ap-4040
- author: Vokurka, Karel
- title: EXPERIMENTAL DETERMINATION OF TEMPERATURES IN SPARK GENERATED BUBBLES OSCILLATING IN WATER
- date: 2017-05-02
- words: 5977
- flesch: 63
- summary: The individual frames in Figure 2 can be traced to the corresponding points on the plot of bubble radius vs. time, given in Figure 3. It is found that the maximum surface temperatures of the plasma core range 4300–8700 K. Keywords: spark-generated bubbles; temperatures in bubbles; bubble oscillations.
- keywords: bubble; bubble oscillation; contraction; core; data; determination; determined; discharge; estimate; experimental; figure; frames; high; intensity; interior; interval; laser; light; liquid; luminescence; maximum; optical; oscillation; phase; phys; plasma; plasma core; pp1; pressure; pulse; pzp1; radiation; radius; range; record; results; rm1; second; set; size; spark; sparker; surface; temperature; time; u1(t; values; variation; vokurka; voltage; wall; water; work; zm1
- versions: original; plain text
- ap-4068
- author: Štancl, Jaromír; Skočilas, Jan; Landfeld, Aleš; Žitný, Rudolf; Houška, Milan
- title: ELECTRICAL AND THERMODYNAMIC PROPERTIES OF A COLLAGEN SOLUTION
- date: 2017-06-30
- words: 3575
- flesch: 51
- summary: The transition region of collagen to gelatin has been observed from the measured temperature dependence of specific electrical conductivity, and has been confirmed by specific heat capacity measurements by a differential scanning calorimetry. The results of our experiments show that specific electrical conductivity of collagen solution is strongly dependent on temperature.
- keywords: acta; capacity; collagen; collagen solution; conductivity; c−1; dependence; doi:10.1016; dsc; electrical; electrical conductivity; electrodes; experimental; field; food; frequency; gelatin; heat; heat capacity; kg−1; material; measurements; meat; model; m−1; observed; ohmic; parameters; properties; range; region; results; sample; sec; significant; solution; specific; specific electrical; specific heat; table; temperature; tested; thermal; thermal conductivity; ° c
- versions: original; plain text
- ap-4073
- author: Bradáč, Josef; Moravec, Jaromír
- title: THE IMPACT OF SELECTED PROCESSES AND TECHNOLOGICAL PARAMETERS ON THE GEOMETRY OF THE WELD POOL WHEN WELDING IN SHIELS GAS ATMOSPHERE
- date: 2017-05-02
- words: 5020
- flesch: 58
- summary: Preheating temperatures were chosen as 100, 200 and 300 °C with welding speed of 0.2–0.5 m/min and the welding cur- rent of 140 A. Higher welding speeds were not used because of the small amount of filler material melting. This is valid for the whole speed range of welding speeds, see Figure 13.
- keywords: acta; arc; base; calculations; case; chemical; current; density; depth; determined; diameter; different; effect; experiments; figure; fillet; gas; geometric; geometry; heat; high; higher; important; influence; input; material; melting; model; numerical; parameters; penetration; polytechnica; pool; possible; preheating; process; process parameters; processes; properties; results; selected; shape; simulation; size; source; speed; steel; surface; technological; temperature; transfer; type; values; variables; weld pool; welding; welding current; welding speed; wire; wire diameter
- versions: original; plain text
- ap-4087
- author: Fořt, Jan; Beran, Pavel; Konvalinka, Petr; Pavlík, Zbyšek; Černý, Robert
- title: EVALUATION OF THE APPLICATION OF A THERMAL INSULATION SYSTEM: IN-SITU COMPARISSON OF SEASONAL AND DAILY CLIMATIC FLUCTUATIONS
- date: 2017-06-30
- words: 4534
- flesch: 43
- summary: Indoor ther- mal comfort can be perceived as the one of the most im- portant factors and achievement of the indoor thermal comfort for building occupants represents a substantial objective, which should be satisfied in order to provide appropriate working and health conditions [14]. Importance of the maintenance of ambient air is connected not only with comfort of building occupants, but also with health issues.
- keywords: acta; air; application; applied; assessment; autumn; building; climatic; comfort; comparison; conditions; consumption; czech; daily; data; days; devices; doi:10.1016; effect; efficiency; energy; envelope; environment; evaluation; exterior; figure; fluctuations; health; heating; humidity; indoor; insulation; layer; level; low; maintenance; monitoring; occupants; order; outdated; performance; period; polytechnica; profiles; quality; reconstruction; relative; relative humidity; republic; seasonal; sensors; stability; state; studied; substantial; summer; system; temperature; thermal; thermal insulation; winter; year
- versions: original; plain text
- ap-4131
- author: Sudibyo, Hanifrahmawan; Shabrina, Zata Lini; Wondah, Hartika Rafih; Hastuti, Retno Tri; Purnomo, Chandra Wahyu; Budhijanto, Wiratni
- title: ANAEROBIC DIGESTION OF LANDFILL LEACHATE WITH NATURAL ZEOLITE AND SUGARCANE BAGASSE FLY ASH AS THE MICROBIAL IMMOBILIZATION MEDIA IN PACKED BED REACTOR
- date: 2018-02-28
- words: 7094
- flesch: 59
- summary: © Czech Technical University in Prague, 2018 available online at http://ojs.cvut.cz/ojs/index.php/ap ANAEROBIC DIGESTION OF LANDFILL LEACHATE WITH NATURAL ZEOLITE AND SUGARCANE BAGASSE FLY ASH AS THE MICROBIAL IMMOBILIZATION MEDIA IN PACKED BED REACTOR Hanifrahmawan Sudibyoa, b, Zata Lini Shabrinaa, Hartika Rafih Wondaha, Retno Tri Hastutia, Lenny Halima, Chandra Wahyu Purnomoa, Wiratni Budhijantoa, b, ∗ a Chemical Engineering Department, Faculty of Engineering, Universitas Gadjah Mada, Jalan Grafika No. 2, Yogyakarta 55281, Indonesia b Center for Energy Studies, Universitas Gadjah Mada, Jalan Bhinneka Tunggal Ika Sekip UGM K-1A, Yogyakarta 55281, Indonesia ∗ corresponding author: wiratni@ugm.ac.id Abstract. Keywords: landfill leachate, natural zeolite, sugarcane bagasse fly ash, growth kinetics, Contois, Haldane.
- keywords: acidogenesis; acidogenic; acta; anaerobic; anaerobic digestion; analysis; bagasse; bed; bfa; biogas; cell; ch4; coefficient; concentration; constants; content; contois; correlation; cumulative; cvfa; data; days; different; digester; digestion; doi:10.1016; experimental; figure; g scod; greater; growth; haldane; height; high; immobilization; immobilization media; immobilized; increase; indonesia; kinetics; landfill; leachate; media; methane; methanogenesis; methanogenic; microbes; microbial; model; natural; natural zeolite; number; order; organic; performance; phase; polytechnica; production; rate; result; scenario; scod; second; solid; sse; study; substrate; sugarcane; table; treatment; value; vfa; volume; waste; wastewater; work; ych4; yx1; yx2; zeolite
- versions: original; plain text
- ap-4152
- author: Kovács, György
- title: OPTIMIZATION METHOD AND SOFTWARE FOR FUEL COST REDUCTION IN CASE OF ROAD TRANSPORT ACTIVITY
- date: 2017-06-30
- words: 4840
- flesch: 57
- summary: The ratio of the road transport in Europe is 78 % of the total freight volume [3], and because the fuel cost is the highest cost among the cost components of the transportation, every transport company puts a great emphasis on optimizing road transport activities and reducing transport costs. The optimal operation of transport routes can be attained in the following ways: • modernization of the vehicle fleet, • integration of multiple transport tasks into a one transport trip, • application of multimodal transport modes, where road, railway, and water transportation modes are integrated, • maximal utilization of vehicles, • application of IT tools in logistics improves the efficiency of transport tasks, and ensures better monitoring and tracking, • reduction of fuel costs of the transport tasks: refill- ing the optimal amount of fuel at the optimal petrol station.
- keywords: actual; actual fuel; case; communication; companies; company; cost; decision; different; driver; figure; fuel; fuel consumption; fuel cost; fuel price; loading; logistics; method; new; optimal; optimal petrol; optimization; petrol; petrol station; reduction; refilled fuel; refuelling; research; result; road; road transport; route; software; station; study; total; total cost; transport; transport cost; transport trip; transport way; transportation; trips; useful; vehicle; volume; way
- versions: original; plain text
- ap-4157
- author: Kačalová, Mária; Pavlenko, Slavko
- title: STRENGHT AND DYNAMIC ANALYSIS OF A STRUCTURAL NODE LIMITING THE MULTI-OUTPUT GEAR MECHANISM
- date: 2017-10-31
- words: 2070
- flesch: 60
- summary: The gear mechanism achieves high gear ratios. Keywords: double-output gear mechanism; gears; strength and dynamic analysis.
- keywords: acta; analysis; bending; contact; design; double; dynamic; element; engineering; fatigue; figure; finite; gear; gear mechanism; haľko; high; issn; load; manufacturing; materials; mechanism; method; model; mpa; multi; output; output gear; output stage; pavlenko; pinion; results; safety; shaft; stage; strength; stress; table; technical
- versions: original; plain text
- ap-4160
- author: Pazderka, Jiří; Hájková, Eva; Jiránek, Martin
- title: UNDERGROUND AIR DUCT TO CONTROL RISING MOISTURE IN HISTORIC BUILDINGS: IMPROVED DESIGN AND ITS DRYING EFFICIENCY
- date: 2017-10-31
- words: 4505
- flesch: 57
- summary: Air ducts, which are situated in the ground, are most often designed as a masonry structure in combination with a traditional concrete slab and concrete screed (Fig. 2). Air duct (concrete blocks) installed into a historic masonry building.
- keywords: acta; air; air duct; air flow; blocks; building; cavity; concrete; content; days; design; doi:10.1016; duct; durability; experimental; fan; figure; flow; heat; historic; humidity; influence; journal; laboratory; level; masonry; materials; measured; measurement; measuring; model; moisture; months; numerical; pazderka; points; polytechnica; properties; reference; remediation; results; sample; simulation; structures; study; surface; system; test; underground; underground air; values; ventilation; wall; water
- versions: original; plain text
- ap-4163
- author: Yusuf, Taofeek Ayotunde
- title: CHARACTERIZATION OF SELECTED PROPERTIES OF COMPOSITES OF WASTE PAPER WITH UNTREATED BAMBOO STEM FIBRE AND RICE HUSK
- date: 2017-09-01
- words: 6959
- flesch: 57
- summary: Keywords: biocomposite properties; waste paper; bamboo stem fibre; rice husk. Bamboo stem fibre is ranked next to wood with world production of 99.1 and 0.56 % in 2004 respec- tively [6].
- keywords: /min; absorption; agriculture; applications; bamboo; bamboo stem; binder; bsf; cassava; cellulose; chemical; cm3; composites; composition; compression; content; density; engineering; fibres; figure; higher; husk; immersion; impact; lignin; lower; machine; makurdi; materials; matrix; mechanical; mould; natural; paper; percentage; plant; production; properties; rate; ratio; result; rice; rice husk; samples; significant; specific; starch; stem; strength; sun; swelling; table; testing; thickness; time; university; volume; waste; waste paper; water; wax; weight; wt%
- versions: original; plain text
- ap-4179
- author: Strnadová, Gabriela; Hanuš, Vlastimil; Kahoun, David; Semerák, Petr; Tříska, Jan
- title: RETRACTED: POSSIBILITY OF MONITORING OF PAHs DISTRIBUTION IN THE VERTICAL PROFILE AT THE BACKGROUND METEOROLOGICAL STATION KREŠÍN
- date: 2017-09-01
- words: 13861
- flesch: 67
- summary: Concentration of individual PAHs on the ground, filters from mercury analyser (ng/m3) CONCLUSION Measurements of PAHs concentrations from December 17, 2014 to December 9, 2015 at Křešín near Pacov meteorological background station have produced unique results. Conclusion Measurements of PAHs concentrations from December 17, 2014 to December 9, 2015 at Křešín near Pacov me- teorological background station have produced unique results.
- keywords: acenaphthylene; acetone; acta; air; aluminium; analyser; analysis; area; aromatic; atmospheric; authors; background; bap; benzo[a]pyrene; benzo[b]fluoranthene; building; cd]pyrene; chrysene; collection; concentration; continuous; czech; december; decrease; described; different; distribution; doi:10.1016; e n; environment; extraction; figure; filters; fluoranthene; foil; following; glass; glassware; group; h e; health; heavier; height; hexane; higher; highest; hydrocarbons; immission; individual; individual pahs; institute; křešín; l o; laboratory; limit; long; loq; lowest; m height; matter; measurements; mercury; meteorological; method; mixture; molecular; monitoring; o n; o q; outdoor; ozone; pacov; pahs; pairs; particles; particulate; period; pollutants; pollution; polycyclic; polytechnica; possibility; profile; ptfe; publications; republic; research; results; ring pahs; rings; samples; sampling; science; season; solvent; station; study; substances; sum; summer; table; temperature; time; total; tower; transport; unit; urban; use; value; vertical; water; winter
- versions: original; plain text
- ap-4182
- author: Wagner, Marcel; Dangel, Felix; Cartarius, Holger; Main, Jörg; Wunner, Günter
- title: NUMERICAL CALCULATION OF THE COMPLEX BERRY PHASE IN NON-HERMITIAN SYSTEMS
- date: 2017-12-30
- words: 4993
- flesch: 66
- summary: In this framework we develop a general numerical gauge smoothing procedure to calculate complex Berry phases from the biorthogonal basis of the system’s non-Hermitian Hamiltonian. Keywords: complex Berry phase; PT symmetry; gauge smoothing.
- keywords: -symmetric; acta; analytical; arbitrary; basepoint; basis; berry; berry phase; biorthogonal; brillouin; calculation; cartarius; case; complex; component; difference; dimensional; doi:10.1103; eigenstates; eigenvectors; fermions; figure; gauge; global; hamiltonian; hermitian; lattice; left; lett; loop; majorana; mechanics; model; non; number; numerical; parameter; phase; phys; point; polytechnica; potential; procedure; pt -symmetric; quantum; real; rev; right; section; smoothing; space; ssh; states; step; symmetry; system; topological; zak; zone
- versions: original; plain text
- ap-4185
- author: Strunina, Svitlana; Hozman, Jiri; Ostadal, Petr
- title: RELATION BETWEEN LEFT VENTRICULAR UNLOADING DURING ECMO AND DRAINAGE CATHETER SIZE ASSESSED BY MATHEMATICAL MODELING
- date: 2017-10-31
- words: 3361
- flesch: 58
- summary: The impact of various catheter sizes (from 5 Fr to 10 Fr) and extracorporeal blood flow values (from 1 L/min to 5 L/min) were investigated. Materials and methods In this study, a computer model was used to assess the LV unloading capacities of various diameters of drainage catheter inserted in the LV and EBF values.
- keywords: arterial; blood; cardiac; catheter; circuit; cycle; decompression; drainage; drainage catheter; ebf; ecmo; end; extracorporeal; figure; flow; language; left; membrane; min; model; modelica; modeling; oxygenation; pressure; pump; rate; simulation; size; study; system; systolic; table; therapy; time; unloading; value; ventricle; ventricular; volume; withdrawal
- versions: original; plain text
- ap-426
- author: Ficker, T.; Macur, J.
- title: A Note on Normalised Distributions of DC Partial Microdischarges
- date: 2003-01-02
- words: 1098
- flesch: 57
- summary: (l3) Analysing the Pareto unnormalised (2) and normalised (II) distributions in bilogarithmic co-ordinates lnw p =Jnc-ulnU => y=k-ux, (14) lnw; =lnc-lnSp -ulnU => y' =k' -ux, (15) k'=k-lnSp, (16) similar conclusions as for exponential distribution can be drawn: in bilogarithmic systems the normalisation proce- dure changes only the vertical position of the graph of the Pareto distribution and does not influence its functional char- acter (slope or asymmetricity). = 0.0685 - 0.0895x (9) which enables us straightforwardly to determine the corre- sponding normalised exponential distribution ,i1r; = o.oasr '.-o o8e5r ittt s;-r
- keywords: distribution; exponential; ficker; function; interval; normalisation; normalised; ordinates; pareto; partial; probability; procedure; pulses; semilogarithmic; time; vol
- versions: original; plain text
- ap-4280
- author: Štorch, Vít; Nožička, Jiří
- title: CONTRA-ROTATING PROPELLER AERODYNAMICS SOLVED BY A 3D PANEL METHOD WITH COUPLED BOUNDARY LAYER
- date: 2017-10-31
- words: 7826
- flesch: 61
- summary: Verification using single propeller wind tunnel results Based on the results obtained during recent series of measurements of model propellers in a wind tun- nel Wake behind single propeller.
- keywords: 3d panel; acta; aerodynamics; airfoil; analysis; angle; b.l; blade; boundary; boundary layer; calculation; coefficient; computational; conditions; contra; dimensional; displacement; distance; downstream; edge; efficiency; equations; experiment; figure; flow; fom; force; free; frequency; induced; inflow; interaction; inviscid; layer; matrix; merit; mesh; method; model; new; nožička; number; numerical; p.m.; panel; panel method; performance; point; polytechnica; power; propeller; ratio; region; replacement; response; results; rotating; rotation; sensitivity; separation; shape; single; solution; source; speed; static; step; surface; system; s−1; thickness; thrust; time; trailing; transition; upstream; velocity; verification; viscous; vortex; wake; štorch; −0.1; −0.2
- versions: original; plain text
- ap-4339
- author: Fernández, Francisco Marcelo; Garcia, Javier
- title: HIGHLY ACCURATE CALCULATION OF THE REAL AND COMPLEX EIGENVALUES OF ONE-DIMENSIONAL ANHARMONIC OSCILLATORS
- date: 2017-12-30
- words: 3212
- flesch: 59
- summary: In this section we also calculate several resonances supported by anharmonic oscillators that were not taken into account by those authors. 391 http://dx.doi.org/10.14311/AP.2017.57.0391 http://ojs.cvut.cz/ojs/index.php/ap Francisco Marcelo Fernández, Javier Garcia Acta Polytechnica We consider examples of resonances embedded in the continuous as well as in the discrete spectrum. − 2064531673055232E8 − 15362232560910336E7 + 158709729905344512E6 − 23752960275863896064E5 − 84068173973645402112E4 + 2318080070178601634304E3 − 6274577633554290840768E2 − 75410626140297229262472E + 655367638076442656931879), (11) respectively.
- keywords: accuracy; accurate; acta; anharmonic; calculation; case; complex; convergence; determinants; dimension; discrete; eigenvalues; equation; example; fernández; figure; gaudreau; lowest; method; oscillators; paper; phys; present; resonances; results; riccati; rpm; spectrum; state
- versions: original; plain text
- ap-440
- author: Repici, G. M.; Sorniotti, A.
- title: A General Approach to Study the Reliability of Complex Systems
- date: 2003-01-03
- words: 4248
- flesch: 52
- summary: Ke,worik: safety, systems reliability, fault tree anallsis (FTA), functional analysis (FA), handling, uhicle dynamic control (VDC) 1 Introduction Automobiles and land vehicles in general have seen a dramatic increase in complexity in recent years. 6 Conclusion and recommendations Our work has presented the preiiminary results and the overall methodological approach to the problem of designing reliability and safety in automotive systems since the very beginning of the developmenr.
- keywords: acta; aerospace; analysis; application; approach; architecture; automotive; avionics; beginning; board; car; complex; components; conditions; control; critical; data; design; development; different; driver; electrical; electronics; failure; fault; field; fig; fta; functions; general; handling; hardware; hydraulic; industry; information; integrating; level; logic; main; methodology; number; order; overall; particular; physical; point; polytechnica; possible; project; purpose; reliability; requirements; results; safety; scheme; software; specific; starting; step; structure; study; system; techniques; terms; time; tree; typical; values; vdc; vehicle; vol; way; work; years
- versions: original; plain text
- ap-4422
- author: Kutílek, Patrik; Škoda, David; Hýbl, Ján; Černý, Rudolf; Frynta, Daniel; Landová, Eva; Frýdlová, Petra; Kurali, Aniko; Doskočil, Radek; Křivánek, Václav
- title: PLATFORM WITH CAMERA SYSTEM FOR MEASUREMENT OF COMPENSATORY MOVEMENTS OF SMALL ANIMALS
- date: 2017-10-31
- words: 10481
- flesch: 57
- summary: Animal holder, 5. IMU, 6. Actuator unit, 7. Control and data collection unit, 8. PC controlling platform movement, 9. PC for data processing and determination of movement angles, 10. 2. Based on the information about the relative head angles in relation to the platform and angles of platform movement in Earth’s coordinate system (i.e. platform pitch angle) it is possible to calculate the head movement in relation to the Earth’s horizontal line [29], i.e. the head pitch angle, Fig. 9.
- keywords: actuator; algorithm; anatomical; angles; angular; animal; axes; axis; base; body; body segment; camera; camera system; case; centres; change; collection; colour; compensatory; conditions; control; coordinate; coordinate system; data; detection; determination; doi:10.1152; earth; example; figure; fps; frame; head; head movement; horizontal; imu; information; journal; line; main; markers; matlab; means; measurement; measuring; method; motors; movement; movement angles; orientation; perpendicular; pitch; pixels; plane; platform; platform movement; position; postural; previous; processing; radius; range; recording; relation; research; response; roll; rotation; segment; set; small; smaller; software; space; subsystem; system; tilt; time; tolerance; unit; user; values; vector; video; way
- versions: original; plain text
- ap-4423
- author: Schnabel, Jan; Cartarius, Holger; Main, Jörg; Wunner, Günter; Heiss, Walter Dieter
- title: SIMPLE MODELS OF THREE COUPLED PT -SYMMETRIC WAVE GUIDES ALLOWING FOR THIRD-ORDER EXCEPTIONAL POINTS
- date: 2017-12-30
- words: 5973
- flesch: 69
- summary: PT -symmetric wave guide setup allowing for the occurrence of an EP3. In addition it is demonstrated that continuous distributions of exceptional points, which render the discovery of the EP3 difficult, are not only a feature of extended wave guides but appear also in an idealised model of infinitely thin guides shaped by delta functions.
- keywords: -symmetric; acta; behaviour; branch; breaking; cartarius; complex; delta; doi:10.1103; eigenstates; eigenvalues; ep2s; ep3; equation; et al; exceptional; exceptional points; figure; form; functions; gain; guides; hamiltonian; heiss; hermitian; index; j phys; lett; loss; main; matrix; mechanics; middle; model; non; observation; optical; order; order exceptional; paper; parameter; permutation; phys; phys rev; physical; physics; points; pt -symmetric; quantum; real; refractive; rev; search; section; separation; setup; simple; space; state; symmetry; system; wave; wave guides; wunner
- versions: original; plain text
- ap-4428
- author: Olusunmade, Olusola Femi; Zechariah, Sunday; Yusuf, Taofeek Ayotunde
- title: CHARACTERIZATION OF RECYCLED LINEAR DENSITY POLYETHYLENE/IMPERATA CYLINDRICA PARTICULATE COMPOSITES
- date: 2018-07-02
- words: 4072
- flesch: 52
- summary: It showed that the RLDPE has a percentage elongation at break Figure 9: Elongation at break at varying IC particulate loading 0 Impact strength and hardness property in relation to IC particulate loading.
- keywords: absorption; acta; average; break; characterization; composite; cylindrica; decrease; density; different; elongation; fibre; figure; hardness; ic particulate; impact; imperata; increase; loading; low; materials; matrix; mechanical; modulus; mould; natural; particulate; particulate loading; percentage; physical; polyethylene; polymer; properties; recycled; rldpe; sachets; sem; specimens; strength; tensile; tensile strength; test; value; vol; waste; water; wt%; wt% particulate
- versions: original; plain text
- ap-4429
- author: Novotny, Jan; Machovska, Ilona
- title: PRIMARY PEAK RATIO CORRELATION TO THE MEASUREMENT ACCURACY OF PIV METHOD
- date: 2018-07-02
- words: 2652
- flesch: 55
- summary: Conclusions This work deals with the evaluation of a measure- ment accuracy based on the detection of the ratio of the primary and the secondary signal peak – the PPR and its correction, considering other parameters influencing the measurement accuracy, by using the Particle Image Velocimetry method – PIV. doi:10.1007/s00348-004-0902-3 [12] K. Okamoto, Nishio T., T. Saga and T. Kobayashi, “Standard Images for Particle Image Velocimetry,” Measurement Sicence and Technology, vol.
- keywords: accuracy; area; correlation; cross; dependency; displacement; error; figure; gradient; image; interrogation; mean; measured; measurement; method; metric; number; particle; peak; piv; plane; ppr; primary; ratio; synthetic; tests; total; value; velocimetry; velocity; vol
- versions: original; plain text
- ap-4434
- author: Mražíková, Anna; Velgosová, Oksana; Kavuličová, Jana; Krum, Stanislav; Málek, Jaroslav
- title: THE INFLUENCE OF SILVER NANOPARTICLES SYNTHESIS ON THEIR PROPERTIES
- date: 2018-12-31
- words: 3082
- flesch: 46
- summary: Application of green methods to replace physical and chemical methods for synthesis of silver nanoparticles (AgNPs) has become necessary not only from economic aspect but especially due to its significant impact on ecosystem. Keywords: silver nanoparticles; biosynthesis; chemical reduction; gelatin; anti-microbial activity.
- keywords: absorption; acta; activity; agar; agno3; agnps; algae; ambient; antibacterial; antimicrobial; biofilm; brown; cells; chemical; citrate; day; different; doi:10.1016; fig; formation; gelatin; green; kessleri; lett; long; materials; methods; nanoparticles; physical; polytechnica; prepared; presence; properties; reduction; results; sem; silver; silver nanoparticles; sizes; sodium; solution; stability; synthesis; technical; tem; temperature; term; university; vis
- versions: original; plain text
- ap-4476
- author: Yadav, Rajesh Kumar; Kumari, Nisha; Khare, Avinash; Mandal, Bhabani Prasad
- title: RATIONALLY EXTENDED SHAPE INVARIANT POTENTIALS IN ARBITRARY D DIMENSIONS ASSOCIATED WITH EXCEPTIONAL Xm POLYNOMIALS
- date: 2017-12-30
- words: 6404
- flesch: 78
- summary: − 1) − 2 ( 4B′2 − (2A′ + 1)2 ) (2B′ cosh r − 2A′ − 1)2 (59) is the rationally extended D dimensional GPT potential. (2B′ cosh r − 2A′ − 1)2 + A′2 (83) and V (+) eff,1(A ′,B′, ,r) = V (A ′−1,B′) GPT (r) + 2(2A′ − 1) (2B′ cosh r − 2A′ + 1) − 2 ( 4B′2 − (2A′ − 1)2 ) (2B′ cosh r − 2A′ + 1)2 + A′2.
- keywords: = −; arbitrary; case; constant; corresponding; cosh; cosh r; dimensions; d−22; eops; equation; exceptional; extended; g(r; gpt; invariant; jacobi; khare; laguerre; m(r; m−1; orthogonal; oscillator; pct; phys; polynomials; potentials; radial; shape; solutions; terms; transformation; usual; α−1; ωr2; −α−1,β−1; −ωr
- versions: original; plain text
- ap-4481
- author: Kumar, Sachin; Ahmed, Zafar
- title: NEW SPECTRAL STATISTICS FOR ENSEMBLES OF 2 × 2 REAL SYMMETRIC RANDOM MATRICES
- date: 2017-12-30
- words: 3452
- flesch: 73
- summary: Keywords: real symmetric matrices; Wigner surmise. 1. This is called the spacing distribution of Gaussian Orthogonal Ensemble (GOE) due to the orthogonal symmetry of real symmetric matrices.
- keywords: analytic; distribution; eigenvalues; elements; f(x; figure; function; gaussian; integral; level; linear; matrices; matrix; near; p(s; pdf; random; real; repulsion; semi; sin; spacing; symmetric; wigner
- versions: original; plain text
- ap-4546
- author: Solnař, Stanislav; Dostál, Martin; Petera, Karel; Jirout, Tomáš
- title: APPLICATION OF THE TEMPERATURE OSCILLATION METHOD IN HEAT TRANSFER MEASUREMENTS AT THE WALL OF AN AGITATED VESSEL
- date: 2018-04-30
- words: 7287
- flesch: 64
- summary: Experimental methods based on measuring vari- ous thermal quantities (heat fluxes, heat flow rates, temperatures) are the ones most frequently used for determining values of heat transfer coefficients. Nowadays, numerical methods implemented in many CFD packages solving momentum and heat transport equations are also fre- quently used to determine heat transfer coefficients in laminar as well as turbulent flow regimes.
- keywords: acta; agitated; axial; baffles; camera; case; characteristic; coefficients; correlation; data; dependency; diameter; dimensionless; dostál; engineering; experimental; figure; flow; flux; function; heat; heat flux; heat transfer; impeller; jet; jirout; karcz; k−1; liquid; local; local heat; mean; measured; method; number; nusselt; nusselt number; oscillation; parameters; petera; phase; pipe; plate; polytechnica; range; response; results; reynolds; rushton; shift; surface; system; s−1; temperature; thermal; thermography; time; toirt; transfer coefficients; transfer surface; turbine; values; velocity; vessel; vessel wall; wall; water
- versions: original; plain text
- ap-4553
- author: Kavuličová, Jana; Mražíková, Anna; Velgosová, Oksana; Ivánová, Dana; Kubovčíková, Martina
- title: STABILITY OF SYNTHESIZED SILVER NANOPARTICLES IN CITRATE AND MIXED GELATIN/CITRATE SOLUTION
- date: 2018-04-30
- words: 3906
- flesch: 54
- summary: Synthesis of silver nanoparticles by using sodium citrate method Chemically synthesized AgNPs were prepared using a chemical reduction method as demonstrated [15]. B:Biointerfaces, 102, 2013, p. 718-723. 108 http://dx.doi.org/10.1186/s40643-015-0076-2 http://dx.doi.org/10.1371/journal.pone.0103675 http://dx.doi.org/10.1016/j.chroma.2011.03.034 http://dx.doi.org/10.1021/jp026731y http://dx.doi.org/10.1039/C3RA44507K http://dx.doi.org/10.1021/es2037405 Acta Polytechnica 58(2):104–108, 2018 1 Introduction 2 Materials and methods 2.1 Chemicals 2.2 Synthesis of silver nanoparticles by using sodium citrate method 2.3 Synthesis of silver nanoparticles by using mixed gelatin/sodium citrate method 2.4 Methods for determination 3 Results and discussion 4 Conclusions Acknowledgements References
- keywords: 118th; 7th; ag+; agent; agnps; average; chemical; citrate; colloids; day; days; diameter; distribution; dls; figure; gelatin; influence; long; mater; method; mixed; nanoparticles; potential; prepared; presence; reaction; reduction; sci; short; silver; silver nanoparticles; size; sodium; solution; spr; stability; stabilizer; storage; surface; synthesis; synthesized; tem; term; zeta
- versions: original; plain text
- ap-4587
- author: Masáková, Zuzana; Mazáč, Jan
- title: ON SELF-SIMILARITIES OF CUT-AND-PROJECT SETS
- date: 2017-12-30
- words: 9566
- flesch: 79
- summary: On its basis, we will set the conditions on the vectors generating the lattice L = {∑s i=1 aili : ai ∈ Z } , so that the scheme is self-similar. = 0, b = −1, and c = d = f = 1, i.e., Z = 0 −1 1 1 0 1 0 0 1 1 0 −1 1 0 0 0 .
- keywords: 4π5; acta; algebraic; complex; conditions; corresponding; cos; cut; cyclotomic; delone; denote; eigenvalues; eigenvectors; example; fold; form; formalism; general; inner; integer; irreducible; lattice; linear; mapping; matrices; matrix; minimal; non; number; order; pisot; polynomial; polytechnica; product; project; project scheme; project set; projection; proof; proposition; quasicrystals; rotations; scheme; self; set; sets; similarities; similarity; sin; suitable; symmetry; theorem; use; vectors; vol; window; zuzana; π1(l; π1,π2; π2(l; σ(ω;
- versions: original; plain text
- ap-4589
- author: Ohya, Satoshi
- title: ALGEBRAIC DESCRIPTION OF SHAPE INVARIANCE REVISITED
- date: 2017-12-30
- words: 4561
- flesch: 69
- summary: A−(j)A−(j + 1) · · ·A−(j + n− 1)ψEn,j+n(x), (4.12) where N = max{n ∈ Z≥0 : j + n < √ g} = νmax − j and ψEn,j+n(x) ∝ (sinh x)j+n exp(− g j+nx). − j2 − g2 j2 , (4.14) where A±(j) = ± d dx − j tanh x + g j .
- keywords: 1)2; = −; algebraic; case; commutation; dimensional; doi:10.1103; eigenvalue; figure; following; hamiltonian; hyperbolic; invariance; j23; j〉‖2; kepler; morse; note; operator; phys; potential; problem; quantum; relations; representation; rev; rosen; shape; space; spherical; state; ψen
- versions: original; plain text
- ap-4598
- author: Maamache, Mustapha
- title: NON-UNITARY TRANSFORMATION OF QUANTUM TIME-DEPENDENT NON-HERMITIAN SYSTEMS
- date: 2017-12-30
- words: 3924
- flesch: 72
- summary: Conclusion It has been established [21–23] that the general frame-work for a description of unitary time evolution for time-dependent non-Hermitian Hamiltonians can be based on the use of a time-dependent metric operator. [4] C. M. Cheng and P. C. W. Fung, J. Phys.
- keywords: algebra; associated; dependent; dependent non; equation; evolution; exp; following; h(t; hamiltonian; hermitian; inner; lett; lewis; maamache; mechanics; non; operator; phys; product; quantum; rev; schrödinger; sinh; solution; states; su(1; su(2; systems; time; transformation; transformed; unitary; |φn(t
- versions: original; plain text
- ap-4603
- author: Fassari, Silvestro; Gadella, Manuel; Nieto, Luis Miguel; Rinaldi, Fabio
- title: ON THE SPECTRUM OF THE ONE-DIMENSIONAL SCHRÖDINGER HAMILTONIAN PERTURBED BY AN ATTRACTIVE GAUSSIAN POTENTIAL
- date: 2017-12-30
- words: 3340
- flesch: 65
- summary: = 0, (30) with Ba,1� = Ba� − Ba,0� , which is obviously trace class. = −�1(λ)2 whose plot is given in Figure 2.
- keywords: 2/2; acta; birman; class; coupling; dimensional; energy; equation; erfc; expansion; e−p; function; gaussian; ground; hamiltonian; integral; operator; parameter; physics; rank; schrödinger; schwinger; spectrum; state; trace
- versions: original; plain text
- ap-4605
- author: Campoamor-Stursberg, Rutwig
- title: FUNCTIONAL REALIZATIONS OF LIE ALGEBRAS AS NOETHER POINT SYMMETRIES OF SYSTEMS
- date: 2017-12-30
- words: 4701
- flesch: 66
- summary: doi:10.1016/j.cnsns.2016.01.015. 378 http://dx.doi.org/10.1007/BF01177044 http://dx.doi.org/10.1080/16073606.1988.9631946 http://dx.doi.org/10.1016/j.cnsns.2014.01.006 http://dx.doi.org/10.1016/S0022-247X(03)00147-1 http://dx.doi.org/10.1016/j.physletb.2007.07.012 http://dx.doi.org/10.1063/1.4974264 http://dx.doi.org/10.1007/s0070 http://dx.doi.org/10.1063/1.4998715 http://dx.doi.org/10.1063/1.527118 http://dx.doi.org/10.1016/j.cnsns.2016.01.015 Acta Polytechnica 57(6):373–378, 2017 1 Introduction 2 Lie and Noether point symmetries of systems 2.1 Perturbations that preserve symmetry subalgebras 3 Functional realizations of sl(2,R) as Noether symmetry algebra 3.1 Separable kinetic Lagrangians 3.2 Systems with fixed symmetry 4 Time-dependent Lagrangians 5 Conclusions Acknowledgements References Functional realizations of Lie algebras are applied to the problem of determining Lie and Noether point symmetries of Lagrangian systems in N dimensions, particularly in the plane.
- keywords: a12(q; acta; algebra; analysis; approach; campoamor; case; condition; conservative; corresponding; differential; dynamical; equations; f(q; following; functions; g(q; gauge; general; generators; generic; inverse; lagrangian; lie; motion; noether; noether point; order; point; realizations; second; sl(2,r; solution; stursberg; symmetries; symmetry; systems; term; time; vector; ∂q1; ∂q2
- versions: original; plain text
- ap-4607
- author: Kotvytskiy, Albert; Bronza, Semen; Shablenko, Vladimir
- title: THE ANALYSIS OF IMAGES IN N-POINT GRAVITATIONAL LENS BY METHODS OF ALGEBRAIC GEOMETRY
- date: 2017-12-30
- words: 6465
- flesch: 82
- summary: In a situation of general position (the Jacobian of the system of lens equations is not equal to zero), the number of point images in an N-point gravitational lens has parity opposite to the parity of the number N. In the proof of Theorem 3 we use the following lemma. The physical formulation of the problem from an algebraic point of view 3 Reduction of the problem to the fundamental problem of classical algebraic geometry 4 Study of the set V1(F1,F2) (Extended solutions) 4.1 1-point lens (Schwarzschild lens) 4.2 2-point lens 5 The study of the set V0(F1,F2) (Point solutions) 6 Conclusions A Appendix References
- keywords: algebraic; bezout; bronza; coefficients; complex; coordinates; definition; deg; degree; equal; equations; example; f(x; f1,f2; field; form; geometry; gravitational; homogeneous; i=1; images; kotvytskiy; lens; lenses; matrix; methods; number; plane; point; polynomial; problem; proof; real; resultant; set; solutions; source; study; sylvester; system; theorem; tx2; variables; x21; x22
- versions: original; plain text
- ap-4608
- author: Joglekar, Yogesh N; Vemuri, Gautam; Wilkey, Andrew
- title: LAMBERT FUNCTION METHODs TO STUDY LASER DYNAMICS WITH TIME-DELAYED FEEDBACK
- date: 2017-12-30
- words: 3666
- flesch: 58
- summary: Since the intensity at very short times grows exponentially with the product of the differential gain coefficient ζ and N(t), and because the steady-state value of N(t) is a function of the pumping P, one can manipulate these two quantities to slow down the exponential growth of laser intensity and thereby enhance the time window in which both conditions are simultaneously met. Note that the rate equa- tion for the macroscopic polarization within the gain medium does not enter this model because it decays very rapidly, relative to the time scale at which E(t) and N(t) evolve in semiconductor lasers, and hence can be adiabatically eliminated.
- keywords: carrier; carrier inversion; complex; delay; differential; dynamics; e(t; electric; electric field; equations; excess; feedback; field; figure; formalism; function; gain; intensity; intracavity; inversion; kobayashi; lambert; lang; laser; model; n(t; optical; power; pump; rate; semiconductor; single; solution; state; steady; system; threshold; time; value; window
- versions: original; plain text
- ap-4610
- author: Kovács, József; Lévai, Géza
- title: ON THE COMMON LIMIT OF THE PT-SYMMETRIC ROSEN–MORSE II AND FINITE SQUARE WELL POTENTIALS
- date: 2017-12-30
- words: 4215
- flesch: 69
- summary: Keywords: PT -symmetric potential; bound states; scattering; Dirac-δ limit. [7] that are solved in terms of the (confluent) hypergeometric function [9] revealed that the characteristic features of PT -symmetric potentials can conveniently be studied using the exact analytical solutions of these potentials.
- keywords: -symmetric; asymptotic; case; coefficients; component; constant; corresponding; doi:10.1016; eigenvalues; energy; finite; functions; imaginary; lett; limit; lévai; math; morse; non; phys; potential; pt -symmetric; real; reflection; results; rosen; sign; spectrum; square; state; symmetry; transmission; vanishing; wave
- versions: original; plain text
- ap-4612
- author: Celeghini, Enrico; Gadella, Manuel; del Olmo, Mariano A
- title: LIE ALGEBRA REPRESENTATIONS AND RIGGED HILBERT SPACES: THE SO(2) CASE
- date: 2017-12-30
- words: 3881
- flesch: 74
- summary: Since this theorem is only valid for |f〉, |g〉 ∈ Φ, we conclude that (12) is only valid for |f〉 ∈ Φ from a strictly rigorous point of view. If |f〉, |g〉 ∈ Φ, then f(φ) = S|f〉 and g(φ) = S|g〉 belong to (SΦ) ⊂ L2[0, 2π].
- keywords: abstract; acta; basis; case; celeghini; continuous; del; dirac; discrete; dual; e−imφ; f(φ; functions; gadella; group; hilbert; l2[0; lie; m=−∞; math; mechanics; olmo; operator; phys; quantum; related; representations; rhs; rigged; so(2; spaces; special; topology; uir; unitary; vectors
- versions: original; plain text
- ap-4615
- author: Semoradova, Iveta
- title: CRYPTO-HERMITIAN APPROACH TO THE KLEIN–GORDON EQUATION
- date: 2017-12-30
- words: 2923
- flesch: 68
- summary: Free Klein–Gordon equation In case of free Klein–Gordon equation operator K = −∆ + m2 (16) acting on H = L2(R3) is positive and Hermitian. They satisfy the so called Dieudonée equation H†Θ = ΘH (25) and they are similar to Hermitian operators h = ΩHΩ−1, (26) where Θ = Ω†Ω is invertible and h = h†. In such scenario, the problem of negative probability interpretation of the Klein-Gordon equation can be reinterpreted as the problem of the wrong choice of metric operator Θ.
- keywords: acta; approach; crypto; czech; der; eigenvalues; eigenvectors; equation; form; free; gordon; gordon equation; hamiltonian; hermitian; hilbert; inner; interpretation; klein; matrix; mechanics; metric; mostafazadeh; non; operator; phys; physik; positive; probability; problem; product; quantum; quasi; real; schrödinger; space; theory; znojil; ψ(1; ψ(2
- versions: original; plain text
- ap-464
- author: Jelínek, I.
- title: Modal Logic - a Tool for Design Process Formalisation
- date: 2003-01-05
- words: 3979
- flesch: 58
- summary: Defi- nition 4 ensures that each design space can be described by a frame F: � �F W R� , , where W represents the set of metamodels, R � W � W characterizes the accessibility relation be- tween individual metamodels. [1] (structure [14]) formally as an ordered couple: � �F W R� , , where W set of worlds, R R W W� � , binary relation (accessibility relation).
- keywords: accessibility; accessible; axiomatic; axioms; cad; connectives; definition; design; following; formula; frame; individual; interpretation; logic; means; metamodel; modal; modal logic; object; possibility; possible; process; propositional; relation; set; steps; system; theory; type; university; valid; validity; world
- versions: original; plain text
- ap-466
- author: Makovička, D.; Král, J.; Makovička, D.
- title: Verification of the Wind Response of a Stack Structure
- date: 2003-01-05
- words: 3845
- flesch: 54
- summary: The measured vibration histories in terms of ac- celeration, velocities and relative deformations, together with the measurements of wind velocity and direction, were evalu- ated by a computer and compared with the response values assumed in the design, with the natural frequencies of the GRP extension according to the designer’s computation and with the frequencies of the dominant vibration sources – ma- jor machines in the environs of the stack. The mea- surements of wind velocity and direction were made on the level of the platform approximately at +53 level.
- keywords: acceleration; czech; design; direction; dominant; dynamic; effects; extension; fig; frequencies; frequency; grp; higher; horizontal; level; load; maximum; mean; mean wind; measured; measurements; natural; records; reference; response; seismicity; stack; steel; steel structure; structure; technical; tower; tower structure; value; velocities; vibration; wind; wind effects; wind load; wind velocity
- versions: original; plain text
- ap-468
- author: Titlestad, J.; Fairlie-Clarke, T.; Davie, M.; Whittaker, A.; Grant, S.
- title: Experimental Evaluation of Mountain Bike Suspension Systems
- date: 2003-01-05
- words: 4830
- flesch: 63
- summary: SU bicycles perform well in laboratory tests, but HT bicycles seem to have the advantage in time trials and races. The great majority of competition mountain bikes include a front sus- pension, but most professional cross-country cyclists do not ride full suspension bicycles
- keywords: arm; axle; bicycle; bike; bracket; bumps; chain; conditions; consumption; crank; cyclist; design; effect; energy; experiments; fig; force; frame; heart; higher; impact; laboratory; measurements; mountain; oxygen; pedals; performance; physiological; position; power; rate; rear; reduced; results; rider; riding; rig; road; roller; seat; significant; su bicycle; subjects; suspension; suspension system; system; tests; time; treadmill; university; variables; vol; wheel
- versions: original; plain text
- ap-4680
- author: Horovčák, Pavel; Terpák, Ján
- title: THERMOCHEMICAL CALCULATIONS USING SERVICEORIENTED ARCHITECTURE IN THE WEB SERVICE FORM
- date: 2018-02-28
- words: 7812
- flesch: 45
- summary: [Interpretation of chemical formulae using web service]. Keywords: thermochemical calculation; chemical reaction; service-oriented architecture; web service.
- keywords: acta; application; architecture; calculations; calling; capacity; case; chemical; chemical reaction; chemistry; client; cloud; components; composition; computing; constant; control; data; database; development; different; energy; enthalpy; entropy; equation; equilibrium; error; file; form; free; functions; gaseous; gibbs; heat; hoff; horovčák; html; individual; information; interval; language; list; logarithm; method; molar; moles; nasa; number; output; parameters; partial; php; polytechnica; pressure; process; product; properties; reaction; resources; service; soa; software; specified; states; step; structure; substances; system; table; temperature; thermochemdc; thermochemdc_app; thermochemical; thermochemical calculations; thermodynamic; tools; use; value; van’t; web; web service; wsdl; xml; ∆rh
- versions: original; plain text
- ap-4699
- author: Legerský, Jan
- title: MINIMAL NON-INTEGER ALPHABETS ALLOWING PARALLEL ADDITION
- date: 2018-10-31
- words: 6103
- flesch: 74
- summary: Parallel addition, i.e., addition with limited carry propagation has been so far studied for complex bases and integer alphabets. We give necessary conditions on the alphabet allowing parallel addition.
- keywords: addition; algebraic; alphabet; assumption; base; block; classes; congruence; conjugate; contradiction; digit; fina(β; finite; following; function; i=0; integer; j=−r; j∈z; lemma; local; matrix; minimal; modulo; modulus; necessary; non; number; numeration; parallel; parallel addition; polynomial; proof; set; system; theorem; z[β; z[ω; φ(λ; ≡β−1
- versions: original; plain text
- ap-470
- author: Cho, H.; Oh, B.; Jo, C.; Lee, K.
- title: Process Design for Hot Forging of Asymmetric to Symmetric Rib-web Shaped Steel
- date: 2003-01-05
- words: 2041
- flesch: 64
- summary: Heat Capacity (J/g�K) AISI 1055 (rail) 51.9 0.472 AISI H-13 (die) 28.6 0.460 Table 1: Thermal properties of materials Fig. 3: Folding initiation at a small fillet angle (45°) of moving die and inserts Fig. 4: Folding initiation between rib and web by top die shows that the metal flow and the folding phenomenon are dependent upon the beginning point of the tapered corner in the upper die. There- fore, optimal die design is necessary in order to avoid an increase in the forming load.
- keywords: design; die; dies; fig; final; flow; folding; forging; high; hot; increase; load; material; process; processing; rail; results; rib; shape; simulation; stage; symmetric; vol; web
- versions: original; plain text
- ap-4702
- author: Mašek, Zdeněk; Diblikova, Linda
- title: HYDROPHOBIC IMPREGNATION OF GEOPOLYMER COMPOSITE BY ETHOXYSILANES
- date: 2018-07-02
- words: 3507
- flesch: 55
- summary: 188 http://dx.doi.org/10.5923/j.textile.20150404.03 http://dx.doi.org/10.1016/j.porgcoat.2013.03.018 http://dx.doi.org/10.1023/A:1022627926243 http://dx.doi.org/10.1111/j.1551-2916.2004.01782.x http://dx.doi.org/10.1016/j.apsusc.2005.12.020 http://dx.doi.org/10.1016/j.tsf.2005.12.245 http://dx.doi.org/10.1039/C7RA04863G Acta Polytechnica 58(3):184–188, 2018 1 Introduction 2 Materials and methods 2.1 Preparation of geopolymer resin and composite samples 2.2 Preparation of hydrophobic solutions and impregnation of samples 2.3 Testing of hydrophobic agents' effectivity 3 Results and discussion 3.1 Effect of treatments on contact angle and storage modulus 3.2 Change of composites properties due to water uptake and sorption of water vapor 4 Conclusion Acknowledgements References The solution F was prepared by the same procedure as solution C, except that 18.6 g of HDTEOS was added instead of 18.6 g of PFTEOS.
- keywords: angle; composite; contact; czech; effect; ethoxysilanes; geopolymer; geopolymer composite; groups; hours; hydrolysis; hydrophobic; hydrophobic impregnation; impregnated; impregnation; materials; min; mixture; modulus; nanoparticles; non; pfoteos; preparation; procedure; properties; resin; results; rpm; samples; silica; sio2; solution; sorption; stirring; storage; structure; surface; temperature; teos; test; treatment; uptake; vapour; water; ° c
- versions: original; plain text
- ap-4708
- author: Krupička, Jan; Picek, Tomáš; Zrostlík, Štěpán
- title: REDUCTION OF UNCERTAINTIES IN LASER STRIPE MEASUREMENT OF SOLID PARTICLES CONCENTRATION
- date: 2018-07-02
- words: 4643
- flesch: 56
- summary: Keywords: laser stripe measurement; coarse particle concentration; solid fraction measurement; fluidization cell; brightness threshold. Laser stripe measurement (LSM) is a relatively novel method for measuring a local concentration of coarse particles in a mixture with fluid.
- keywords: angle; brightness; bth; calibration; camera; cell; concentration; coordinates; data; distinct; evaluated; figure; flow; fluidization; flume; histograms; hits; image; laser; laser sheet; laser stripe; line; lsm; mean; measured; measurement; method; observation; opt; optical; parameters; particles; peaks; position; results; sensitivity; sheet; stripe; target; threshold; transformation; value; vol; wall; ∆y0
- versions: original; plain text
- ap-4714
- author: Řehounek, Luboš; Denk, František; Jíra, Aleš
- title: NUMERICAL SIMULATIONS OF STATIC STRENGTH OF NOVEL DENTAL IMPLANTS
- date: 2018-08-30
- words: 2694
- flesch: 59
- summary: Keywords: dental implant; numerical; static strength; osseointegration; FEM. Both implants belong to the “push-in” category of dental implants.
- keywords: analysis; body; bone; clover; cylindrical; czech; denk; dental; dental implants; distribution; figure; implant; implant variant; load; loading; lower; mechanical; mpa; novel; numerical; reference; results; ribs; static; stem; strength; stress; system; values; variant; vertical; zv14112
- versions: original; plain text
- ap-472
- author: Ryś, J.; Sanecki, H.; Trojnacki, A.
- title: Analysis of Gear Wheel-shaft Joint Characterized by Comparable Pitch Diameter and Mounting Diameter
- date: 2003-01-05
- words: 5571
- flesch: 67
- summary: The well-founded assumption can be introduced that the frictional joint is additionally loaded with the entire force � �F F F Fa b a* ( )� � , while the force F b( )* in the bolt is the same during service ( ) (13) one parameter of the joint (consequently p) can be expressed in terms of the other parameters tg tg tg � � � � � � cos cos � � � � � � � � � � � � � � � 2 21 p � � � � �� � p c � �� � � � � � � � � � �� � � � � � � � � � � � �2 2 4 6 3 2 2 tg tg tg 2 cos � � 2 0 , (14) where � � � � � �� � w p p v s t b � � � � � � � � � * sin cos ( ) � � � � � � � �� 1 1 2 1 1 2 6 3 2 2 tg tg 3 1 1 2 3 u u Q k k k ku bE sE bE sE � � � � � � � � � �tg .
- keywords: analysis; assumed; bending; bolt; calculations; contact; diameter; dimensionless; factor; fatigue; fig; force; frictional; frictional joint; gear; intensity; joint; length; load; moment; mpa; parameters; pinion; pitch; pressure; r �; respect; shaft; small; spring; statistical; steel; strength; surface; taper; teeth; torsion; transmission; values; vol; wheel; � cos; � �
- versions: original; plain text
- ap-474
- author: Diviš, M.; Tichánek, R.; Španiel, M.
- title: Heat Transfer Analysis of a Diesel Engine Head
- date: 2003-01-05
- words: 2895
- flesch: 52
- summary: It contains a detailed description of a C/28 series diesel engine head FE model and a discussion of heat transfer analysis tunning and results. Keywords: heat transfer analysis, FEM, internal-combustion engine.
- keywords: analysis; assembly; boiling; boundary; case; coefficient; conditions; contact; cooling; cylinder; cylinder head; czech; engine; exhaust; fig; fuel; gases; head; heat; house; information; injector; inlet; measured; model; parts; points; results; seat; surfaces; table; technical; temperature; thermal; transfer; university; values; valve
- versions: original; plain text
- ap-4740
- author: Quesne, Christiane
- title: QUASI-EXACTLY SOLVABLE SCHRÖDINGER EQUATIONS, SYMMETRIC POLYNOMIALS AND FUNCTIONAL BETHE ANSATZ METHOD
- date: 2018-04-30
- words: 5829
- flesch: 82
- summary: k(k − 1) (l + 2)(l + 1)al+2 − n k − 1 (l + 1)bl+1 + Ck−l−2,n l! , l = 0, 1, . . . − C1,n (k − 3)!
- keywords: 1)ak; acta; c1,n; c2,n; coefficients; constants; corresponding; degree; differential; equation; fba; general; i=1; integration; j=1; k(k; k−1∑; k−2∑; l=0; lakshmanan; linear; m(m−1−p; m=0; m=1; math; mathews; method; nonlinear; order; oscillator; p=1; pages; phys; polynomial; qes; quantum; quasi; real; roots; schrödinger; second; section; solutions; solvable; symmetric; terms; z(z
- versions: original; plain text
- ap-476
- author: Jokele, B.; Fuchs, D. K.
- title: Reducing Time for the Product Development Process by Evaluation in the Phase of Solution Searching
- date: 2003-01-05
- words: 2116
- flesch: 58
- summary: 5/2003 Reducing Time for the Product Development Process by Evaluation in the Phase of Solution Searching B. Jokele, D. K. Fuchs Less and less time is available for product development process. 1: Possible stages in product development process a troubleshooting situation is lack of time.
- keywords: approach; change; components; cost; curve; degrees; design; development; effects; engineering; evaluation; fig; freedom; management; methods; münchen; possible; problem; process; product; properties; searching; situation; solution; step; system; technical; time; tools; troubleshooting
- versions: original; plain text
- ap-4768
- author: Hájková, Petra; Jíra, Aleš; Řehounek, Luboš
- title: VERIFICATION OF BEHAVIOUR OF HUMAN ENAMEL FOR FRACTURE TOUGHNESS DETERMINATION
- date: 2018-08-30
- words: 4054
- flesch: 60
- summary: A part of the re- view was also dedicated to a comparison of results of fracture toughness, determined by the VIF method using three different popular equations, for standard reference material (SRM). As the authors expected, none of these equations yielded correct certified values of fracture toughness for the SRM.
- keywords: applied; area; authors; behaviour; brittle; changes; contact; cracks; curve; dental; dentin; depth; determination; different; enamel; energy; fig; fracture; fracture toughness; hardness; hit; human; indentation; indents; initiation; kic; load; loading; materials; maximum; mechanical; method; modulus; nanoindentation; overall; propagation; properties; reduced; results; specimen; study; test; tip; toughness; use; values; velocity
- versions: original; plain text
- ap-478
- author: Geromiller, H.-P.; Farschtschi, A.
- title: Numerical Calculation of Electric Fields in Housing Spaces Due to Electromagnetic Radiation from Antennas for Mobile Communication
- date: 2003-01-05
- words: 1045
- flesch: 52
- summary: 43 No. 5/2003 0 20 30 40 50 60 70 80 90 0 1 2 3 E Emax / inc 10 Angle of incidence [°] Fig. 2: Dependency of maximum electric field strength inside a housing space referred to incident electric field strength (Emax /Einc) over angle of incidence (�) References [1] Berenger, J. P.: It should be taken into account that the effects of electromagnetic radi- ation on humans are quadratically dependent on the electric field strength, as these effects are mainly related to the ener- getic density of the electromagnetic waves, and therefore the negative impacts on humans increase disproportionately with electric field strength.
- keywords: angle; electric; electromagnetic; field; housing; incidence; incident; plane; pml; source; space; strength; time; wave
- versions: original; plain text
- ap-480
- author: Brůžek, B.; Leidich, E.
- title: Numerical Simulation of Stresses in Thin-rimmed Spur Gears with Keyway
- date: 2003-01-05
- words: 3516
- flesch: 71
- summary: [mm] Fig. 8: Stress distribution in the loaded root of the tooth (left) and in the keyway (right) for double-sided torque distribution; � � 2.5°; module 2 mm; normal force on tooth Z3; �, �: see Fig. [mm] Fig. 10: Stress distribution in the loaded root of the tooth (left) and in the keyway (right) for double-sided torque distribution; � � 2.5°; module 2 mm; normal force on tooth Z3; hub and key flushed 9 Numerical investigated influences The influence of the keyway on stress increase in the root of the tooth is mainly due to small thickness of the hub sk (see Fig. 2).
- keywords: angle; distribution; fig; hub; influence; keyway; left; loaded; loaded root; loading; maximum; model; module; principal; root; shaft; sided; stress; stress distribution; teeth; thickness; tooth; torque
- versions: original; plain text
- ap-482
- author: Vyhlídal, T.; Zítek, P.
- title: Anisochronic Internal Model Control Design
- date: 2003-01-05
- words: 4919
- flesch: 66
- summary: The zeros of system (5) are the roots of the following equation � � � �N s a s� � � �1 0exp � (6) Considering variable s as a complex variable, i.e., s � �� �j , the complex roots of (6) are the solutions of the equations � �� � � � � �Re exp cosN s a� � � �1 0�� �� (7) � �� � � � � �Im Theoretically, it is possible to use the term � �Ls s� �exp � , but as � � � �Re Im . 0 5 (where m is a dominant zero of the system) the ratio � L becomes very large, which is not convenient from the numerical point of view.
- keywords: anisochronic; closed; complex; control; controller; delay; design; dominant; dynamics; exp exp; exp �; fig; following; function; g s; imc; loop; m s; model; order; poles; real; roots; s k; s s; s �; spectrum; swy �; system; tf �; time; vol; zeros; � f; � j; � n; � �
- versions: original; plain text
- ap-4833
- author: Machovec, Jan; Reiterman, Pavel
- title: INFLUENCE OF AGGRESSIVE ENVIRONMENT ON THE TENSILE PROPERTIES OF TEXTILE REINFORCED CONCRETE
- date: 2018-08-30
- words: 5646
- flesch: 58
- summary: Three types of used textile reinforcement. Results Performed experimental program was focused on the assessment of the resistance of TRC made of HPC matrix and glass textile reinforcement to various aggressive environments.
- keywords: 100c; 50c; accelerated; acidic; aggressive; alkaline; behaviour; compressive; concrete; crack; days; doi:10.1016; durability; effect; environment; experimental; figure; flexural; freeze; freezing; glass; h2so4; high; influence; layers; loss; mass; materials; matrix; mechanical; naoh; point; program; properties; ref; reinforcement; resistance; results; samples; silica; solution; specimens; strength; structures; studied; surface; tensile; test; testing; textile; thaw; thawing; trc; values
- versions: original; plain text
- ap-484
- author: Lazim, Tholudin Mat; Mat, Shabudin; Saint, Huong Yu
- title: Computational Fluid Dynamic Simulation (CFD) and Experimental Study on Wing-external Store Aerodynamic Interference of a Subsonic Fighter Aircraft
- date: 2003-01-05
- words: 3586
- flesch: 53
- summary: Research on external store installation is complex and extensive. The methods for determining the influence of stores on the wing will be used to simulate the full size of this fighter aircraft with real size external store.
- keywords: -0.2; aerodynamic; aircraft; analysis; cfd; clean; coefficient; computational; configuration; distribution; elements; experimental; external; external store; fig; fighter; flow; fluid; geometry; interference; journal; lower; lower surface; mid; model; number; numerical; pressure; process; results; section; simulated; simulation; software; span; station; store; study; subsonic; surface; testing; tunnel; upper; upper surface; vol; wind; wing
- versions: original; plain text
- ap-486
- author: Ritschl, E.; Theiner, R.; Hanus, D.
- title: Inlet Channel for a Ducted Fan Propulsion System of a Light Aircraft
- date: 2003-01-06
- words: 1684
- flesch: 66
- summary: Smoothness and continuity of the channel chord ratio are the main requirements of channel design. 6/2003 Version No. Channel Design CFD Flow Computation 10 12 Fig. 5: Some of the design verions of the proposed channel Fig. 6: Experimental measurement of proposed channel © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 7 Acta Polytechnica Vol. 43
- keywords: acta; aircraft; channel; cold; cross; czech; data; design; engine; experimental; fan; field; fig; flow; inlet; jet; light; model; outlet; polytechnica; propulsion; section; technical; university; velocity; version; vol
- versions: original; plain text
- ap-4862
- author: Flegner, Patrik; Kačur, Ján
- title: EVALUATION OF SENSOR SIGNAL PROCESSING METHODS IN TERMS OF INFORMATION THEORY
- date: 2018-12-31
- words: 5151
- flesch: 58
- summary: The paper deals with the examination of basic methods of evaluation of sensor signals in terms of the information content of the given method and the used technical means. Digital measuring system Nowadays, in the practical applications of the the- ory of the automatic control or digital signal process- ing
- keywords: accuracy; acoustic; acta; amplitude; analog; analog signal; analysis; basic; bit; class; complex; content; control; converter; data; digital; disintegration; distribution; doi:10.1016; domain; drilling; elements; entropy; equation; evaluation; example; figure; flegner; frequency; hybrid; information; kačur; levels; log2; maximum; measured; measurement; measuring; metalurgija; methods; mining; number; polytechnica; possible; practice; probability; processes; processing; real; rock; rope; rotary; samples; sensor; sensor signal; set; signal; signal processing; source; spectra; spectrogram; spectrum; steel; system; technical; terms; theory; time; valid; value; variable
- versions: original; plain text
- ap-488
- author: Valášek, M.; Steinbauer, P.; Kolář, J.; Dvořák, J.
- title: Concurrent Design of Railway Vehicles by Simulation Model Reuse
- date: 2003-01-06
- words: 3177
- flesch: 48
- summary: The particular relationships between world models and their components can also be generalized into more abstract knowledge about the development of virtual models and their simulation (Fig. 5) Due to the nature of the described methodology, simulation models are an essential part of this.
- keywords: acta; cases; clockwork; components; conceptual; czech; design; different; engineering; environment; fig; informal; knowledge; level; methodology; model; modelling; object; particular; physical; polytechnica; previous; process; question; railway; real; real world; related; simulation; support; system; task; technical; university; vehicle; virtual; vol; world
- versions: original; plain text
- ap-4889
- author: Samir, Benbakreti; Boukelif, Aoued
- title: NEW APPROACH FOR ONLINE ARABIC MANUSCRIPT RECOGNITION BY DEEP BELIEF NETWORK
- date: 2018-10-31
- words: 7423
- flesch: 59
- summary: Arabic words recognition rates and classifi- cation time according the neural network. made in the different neuronal approaches. Arabic words recognition rates and classifi- cation time according the DBN network.
- keywords: acta; algorithm; approach; arabic; arabic characters; architecture; basis; belief; benbakreti; best; boukelif; calculation; case; character; classic; classification; database; dbn; deep; different; direction; divergence; end; error; extraction; features; figure; following; forms; function; grnn; handwriting; handwriting recognition; handwritten; hidden; input; layer; learning; length; manuscript; method; mlp; model; network; neural; neural network; neurons; new; number; online; online arabic; output; paper; parameters; phase; points; polytechnica; position; preprocessing; previous; probabilistic; probability; problem; pseudo; radial; rate; rbf; rbm; recognition; restricted; results; sampling; second; signal; step; system; table; tdnn; temporal; time; training; use; variability; vector; visible; weight; words; writer
- versions: original; plain text
- ap-490
- author: Hagras, T.; Janeček, J.
- title: Static vs. Dynamic List-Scheduling Performance Comparison
- date: 2003-01-06
- words: 4306
- flesch: 69
- summary: Keywords: list scheduling, compile time scheduling, task graph scheduling, homogeneous computing. The communication cost ci, j for transferring data from task vi (scheduled on pm) to task vj (scheduled on pn), is defined as: c S Ri j i j, ,� � � � , where S is the cost of starting communication between proces- sors (in secs), �i, j is the amount of data transmitted from task vi to task vj (in bytes), R is the cost of communication per transferred byte (in sec/byte).
- keywords: algorithm; better; communication; comparison; cost; dag; dls; dynamic; earliest; etf; execution; exit; fig; graph; hlfet; level; list; mcp; node; processor; schedule; scheduling; section; set; start; static; table; task; time; vol
- versions: original; plain text
- ap-4911
- author: Vokurka, Karel
- title: THE TIME DIFFERENCE IN EMISSION OF LIGHT AND PRESSURE PULSES FROM OSCILLATING BUBBLES
- date: 2018-10-31
- words: 6608
- flesch: 69
- summary: Keywords: spark-generated bubbles; light emission; bubble oscillations. The bubble size is RM1 = 49 mm, the intensity of bubble oscillation is pzp1 = 142.1. 327 Karel Vokurka Acta Polytechnica −100 −80 −60
- keywords: acoustic; acta; bubble; bubble oscillation; bubble size; cavitation; contraction; difference; difference δ1; discharge; distance; earlier; emission; example; expansion; experimental; figure; flashes; hydrophone; instants; intensity; interval; large; light; maxima; maximum; optical; oscillating; p1(t; phase; phys; plasma; plasmoids; polytechnica; pressure; pressure pulses; pulses; pzp1; radiation; records; results; review; rm1; size; spark; tc1; time; time difference; tp1; tu1; um1; value; variation; vokurka; voltage; water; waves; width; work
- versions: original; plain text
- ap-4915
- author: Pehnelt, Tomáš; Lafata, Pavel; Nevosad, Marek
- title: MODIFICATION OF HIERARCHICAL AGGLOMERATIVE CLUSTERING WITH COMPLETE LINKAGE FOR OPTIMAL USAGE WITH PASSIVE OPTICAL NETWORKS
- date: 2018-12-31
- words: 4221
- flesch: 52
- summary: Today, passive optical networks (PONs) represent a modern solution for high-speed FTTx subscriber lines and networks. Keywords: passive optical network; network optimization; topology optimization; algorithms; hierar- chical clustering; optical splitter placement.
- keywords: agglomerative; agglomerative clustering; algorithm; attenuation; city; clustering; clusters; comparison; complete; conference; deployment; designing; distance; doi:10.1109; fibres; figure; following; hierarchical; hierarchical agglomerative; ieee; international; linkage; methods; network; number; olt; ont; optical; optimization; optimum; order; paper; passive; passive optical; pon; pons; process; ratio; results; rural; solution; splitters; splitting; summary; techniques; topology; units; urban; value
- versions: original; plain text
- ap-4917
- author: Ouamara, Daoud; Dubas, Frédéric; Randi, Sid Ali; Benallal, Mohamed Nadjib; Espanet, Christophe
- title: GENERAL CALCULATION OF WINDING FACTOR FOR MULTI-PHASE/-LAYER ELECTRICAL MACHINES IRRESPECTIVE OF POLES NUMBER
- date: 2019-04-30
- words: 4547
- flesch: 74
- summary: Acta Polytechnica doi:10.14311/AP.2019.59.0153 Acta Polytechnica 59(2):153–161, 2019 © Czech Technical University in Prague, 2019 available online at http://ojs.cvut.cz/ojs/index.php/ap GENERAL CALCULATION OF WINDING FACTOR FOR MULTI-PHASE/-LAYER ELECTRICAL MACHINES IRRESPECTIVE OF POLES NUMBER Daoud Ouamaraa, b, ∗, Frédéric Dubasa, Sid Ali Randic, Mohamed Nadjib Benallalb, Christophe Espanetd a Univ. A new feature of the multi-layer windings is introduced, it is called false-zero windings, which is divided into two categories: i) α-windings (i.e., odd false-zero windings), and ii) β-windings (i.e., even false-zero windings).
- keywords: acta; application; calculation; concentrated; conductor; design; distribution; doi:10.1109; electrical; example; factor; false; figure; fractional; general; ieee; layer; layer winding; machines; magnet; matrix; method; multi; number; odd; paper; permanent; phase; poles; polytechnica; results; rotor; single; slots; stator; step; turns; vector; viz; winding; ′w]1
- versions: original; plain text
- ap-492
- author: Jokl, M. V.
- title: Indoor Air Quality Assessment Based on Human Physiology - Part 1. New Criteria Proposal
- date: 2003-01-06
- words: 3203
- flesch: 55
- summary: [dB TVOC], (5) where � CO2 and �TVOC represent the concentrations of CO2 and TVOC. (1) Applied to acoustic component of the environment L SPL P P P � � 20 0 log [dB], (2) where L SPLP � � sound pressure level [dB); P � acoustic pressure (when measuring the RMS value, i.e. the square root of the arithmetic average of a set of squared instantaneous values); P0 � acoustic pressure at the threshold of hearing (for air P0 � 20 �Pa).
- keywords: acta; air; building; co2; concentration; czech; dcd; decibel; environment; equation; experimental; fig; house; http://ctn.cvut.cz/ap/; human; indoor; level; locations; mean; measured; new; odor; perception; point; polytechnica; ppm; publishing; quality; relationship; scale; technical; threshold; toxic; tvoc; units; university; values; vol
- versions: original; plain text
- ap-4922
- author: Kravanja, Sebastjan; Sovják, Radoslav
- title: ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE UNDER HIGH-VELOCITY PROJECTILE IMPACT. PART I. EXPERIMENTS
- date: 2018-08-30
- words: 5134
- flesch: 60
- summary: Keywords: projectile impact; UHPFRC; depth of penetration; mechanical properties; shear crack resistance. Cubes were differ- entiated on the basis of the fibre volumetric content and effect of projectile impact was investigated in terms of the cratering damage.
- keywords: area; case; compressive; compressive strength; concrete; core; correlation; crack; crater; damage; deformable; degrees; depth; diameter; direct; doi:10.1016; dop; energy; experimental; factor; fibre; flexural; fmj; fraction; head; high; impact; impact resistance; increment; int; jacket; length; loading; material; measured; mechanical; mixture; msc; penetration; performance; point; projectile; projectile impact; properties; resistance; shear; slc; specimens; strain; strength; study; table; target; tensile; test; total; uhpfrc; ultimate; ultra; unconfined; velocity; volume; volumetric
- versions: original; plain text
- ap-4924
- author: Kravanja, Sebastjan; Sovják, Radoslav
- title: ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE UNDER HIGH-VELOCITY PROJECTILE IMPACT - PART 2. APPLICABILITY OF PREDICTION MODELS
- date: 2018-12-31
- words: 6389
- flesch: 57
- summary: Keywords: projectile impact; UHPFRC; prediction models; depth of penetration; mass ejection. The major supposition in the develop- ment of prediction models was that the penetration depth and crater volume are in inverse correlation to the unconfined compressive strength of the con- crete.
- keywords: abbas; accuracy; accurate; acta; almusallam; analytical; area; authors; case; compressive; concrete; cone; core; correlation; crater; data; deformable; deformable projectile; depth; diameter; doi:10.1016; effect; ejection; empirical; energy; eng; equation; et al; experimental; fibre; figure; fmj; formula; high; hwang; impact; int; length; logarithmic; mass; material; model; modified; msc; ndrc; non; nose; parameters; penetration; penetration depth; performance; prediction; prediction models; projectile; projectile impact; resistant; results; rigid; rubin; scabbing; semi; shape; slc; spalling; strength; structures; study; table; target; uhpfrc; ultra; use; values; velocity; volumetric; yarin
- versions: original; plain text
- ap-4928
- author: Shalimba, Veikko; Sopko, Vít
- title: JATROPHA OIL WITH IRON NANOPARTICLES APPLICATION IN DRILLING PROCESSES
- date: 2019-07-01
- words: 2500
- flesch: 63
- summary: Water with iron nanoparticles samples were chosen because, in general, water is the heat transfer medium for heat exchangers, because of its availability and good thermo-physical properties. According to the safety regulation EC.: 19017/2006, nanofluid samples used in this experiment were classified as not danger- ous materials under the act on chemical substances and preparations.
- keywords: base; change; conductivity; cooling; cutting; deviation; drilling; e100; experimental; figure; fluid; heat; high; iron; j n; jatropha; nanofluids; nanoparticles; oil; peak; properties; samples; table; temperature; thermal; time; transfer; volume; water
- versions: original; plain text
- ap-4934
- author: Panchenko, Sergii; Ohar, Oleksandr; Kutsenko, Maksym; Smachilo, Julia
- title: A METHOD OF COMPLEX CALCULATION OF RATIONAL STRUCTURAL PARAMETERS OF RAILWAY HUMPS
- date: 2018-12-31
- words: 3872
- flesch: 70
- summary: − I2 − 25) + U2x+2(V = 0, U2x(Ix − 50) = 0, U2x+1(I1 − I2 − 25) = 0, 376 vol.
- keywords: 1,m; area; arrangement; authors; braking; calculation; car; conditions; costs; crest; cut; difficult; element; gravity; heavy; hump; hyrp; i=1; length; limitations; linear; method; needed; number; origin; parameters; profile; railway; regulation; regulators; research; rolling; section; speed; structural; switching; task; technological; technology; v0,i1,i2; yrp
- versions: original; plain text
- ap-494
- author: Jokl, M. V.
- title: Indoor Air Quality Assessment Based on Human Physiology - Part 2. Limits
- date: 2003-01-06
- words: 3136
- flesch: 65
- summary: [�g � m�3] we get for adapted persons, preferring again �p as it was with CO2, � �� ��� TVOC � � � �46000 5 98 104ln .PD � � � [l�s�1�p�1](4) where RB � 7 5. 1�s �1 �p�1, prescriptive outdoor air require- ment for unadapted persons [9] GBTVOC � 5140 �g�h �1 �p�1, TVOC load caused by sedentary person (see Table 2.2); � iTVOC � 200 �g � m �3, TVOC indoor air concentration for 20 % dissatisfied unadapted person (see Fig. 2.4); � eTVOC �10 �g � m �3, TVOC outdoor air concentration, as a result of Eq.
- keywords: admissible; air; asthm; buildings; co2; concentration; czech; dcd; dissatisfied; dtv; fig; indoor; limit; long; optimal; persons; ppm; quality; range; sbs; short; table; term; tolerable; tvoc; unadapted; units; value; � g
- versions: original; plain text
- ap-496
- author: Jokl, M. V.
- title: Indoor Air Quality Assessment Based on Human Physiology - Part 3. Applications
- date: 2003-01-06
- words: 5247
- flesch: 68
- summary: G R R R P P P P � � � � � � � � � � � � 2420 10 10 0 21 10 7 6 6 2 1 1 1 . Keywords: indoor air quality, odors, air changes estimation.
- keywords: acta; adapted; air; air quality; appendix; area; ashrae; bsr; building; co2; conf; constituent; converted; crump; czech; direct; eds; environment; eur; exhaust; fixture; formulas; health; house; http://ctn.cvut.cz/ap/; indoor; indoor air; int; listed; log; london; minimum; new; odor; office; optimal; outdoor; people; persons; polytechnica; prescriptive; publishing; quality; range; rate; requirements; room; section; simple; spaces; standard; supply; system; table; technical; tvoc; units; university; values; ventilation; vol
- versions: original; plain text
- ap-4969
- author: Adlerová, Iva
- title: Editorial: FAREWELL AND WELCOME NEW EDITOR-IN-CHIEF
- date: 2018-07-02
- words: 394
- flesch: 51
- summary: Acta Polytechnica doi:10.14311/AP.2018.58.00IX Acta Polytechnica 58(3):ix–ix, 2018 © Czech Technical University in Prague, 2018 available online at http://ojs.cvut.cz/ojs/index.php/ap Farewell and Welcome New Editor-in-Chief My seven years with Acta Polytechnica ended on June 30. I very respect her professional skills, I am convinced that she has the right motivation for the successful management of Acta Polytechnica and I wish her all the best.
- keywords: acta; chief; cooperation; editor; journal; polytechnica; support
- versions: original; plain text
- ap-4976
- author: Munshi, Mohmmadraiyan M.; Patel, Ashok R.; Deheri, Gunamani B.
- title: A STUDY OF FERROFLUID LUBRICATION BASED ROUGH SINE FILM SLIDER BEARING WITH ASSORTED POROUS STRUCTURE
- date: 2019-04-30
- words: 4461
- flesch: 62
- summary: This paper attempts to study a ferrofluid lubrication based rough sine film slider bearing with assorted porous structure using a numerical approach. A study of ferrofluid lubrication based rough sine film slider bearing. . . study.
- keywords: assorted; bearing; bearing capacity; calculated; capacity; carman; carrying; comparison; deheri; effect; engineering; equation; ferrofluid; field; figure; film; flow; impact; journal; kozeny; load; load bearing; lubrication; magnetic; magnetization; model; patel; performance; porosity; porous; profile; result; rough; roughness; sine; slider; slider bearing; squeeze; structure; study; surface; system; tribology; velocity
- versions: original; plain text
- ap-498
- author: Pekárek, S.
- title: Non-Thermal Plasma Ozone Generation
- date: 2003-01-06
- words: 3396
- flesch: 66
- summary: Consequently, technologies based on non-thermal plasma can be highly ef- fective in promoting oxidation, enhancing molecular dissoci- ation or producing free radicals to stimulate plasmachemical reactions, which can be used for ozone generation or for other ecological applications such as decomposition of pollutants in air streams. Due to the fact that the processes of ozone generation are carried out at atmospheric pressure, we shall focus on atmo- spheric pressure electrical discharges only.
- keywords: air; atmospheric; case; configuration; corona; current; czech; discharge; electric; electrode; electrons; energy; example; field; fig; flow; gas; generation; high; main; needle; nitrogen; non; oxygen; ozone; plasma; plate; pressure; production; rate; reaction; silent; space; technical; temperature; thermal; tube; types; unit; university; vol; voltage
- versions: original; plain text
- ap-4999
- author: Olusunmade, Olusola Femi; Bulus, Abba Emmanuel; Kashin, Terwase Kelvin
- title: EFFECT OF IMPERATA CYLINDRICA REINFORCEMENT FORM ON THE TENSILE AND IMPACT PROPERTIES OF ITS COMPOSITES WITH RECYCLED LOW DENSITY POLYETHYLENE
- date: 2018-10-31
- words: 2744
- flesch: 54
- summary: Compared to the other types of fibre form, the powder form has the smallest volume. The higher value of tensile strength observed for the RLDPE/IC mat composite when compared to that of the neat RLDPE and RLDPE/IC particulate composite was due to the transfer of stress to the IC long-fibre.
- keywords: average; composite; cylindrica; elongation; fibre; fibre mat; figure; form; ic mat; ic particulate; impact; imperata; increase; journal; long; mat; material; matrix; mechanical; modulus; natural; particulate; polymer; properties; reinforcement; rldpe; sachets; specimens; stem; strength; tensile; test; value; vol; water
- versions: original; plain text
- ap-500
- author: Abdelaziz, Taha H. S.; Valášek, M.
- title: A Direct Algorithm for Pole Placement by State-derivative Feedback for Single-input Linear Systems
- date: 2003-01-06
- words: 7841
- flesch: 70
- summary: e e � � � , � ��Q � � � � � � � � � � 1 0 0 0 0 0 0 5 0 0 t te , and � �� . Finally, the feedback gain matrix is � � � � � �K q A B q At t t � � � � � � � � 1 10 10 1 100 4 1 4 1 1 2 3 1 2 e e � � � � � �3 1 2 3 1 2 3 1 2 10 2 100 10 1000 100 � � � � � , , e e t t � � � � � � � � �� � � �1 3 2 3 1 2 3 1 2 3 10 1 100 � � � � � � � � � � � � � � � � � � e t .
- keywords: bkt �; canonical; characteristic; closed; coefficients; control; czech; derivative; derivative feedback; design; equation; feedback; fig; formula; frobenius; gain; input; invariant; linear; loop; matrix; n n; original; placement; pole; polynomial; problem; q q; q t; s �; single; solution; state; state feedback; system; t n; t t; technical; time; transformation; transformed; transient; university; vector; vol; � en; � k; � n; � r; � �
- versions: original; plain text
- ap-5015
- author: Dvořák, Pavel; Jiránková, Eva
- title: EFFECTS ON THE FINAL INTENSITY OF INPUT FORCES IN LONGBOLTS INSTALLED AT THE MINING OPERATION 2 AREA, OKD, INC.
- date: 2018-10-31
- words: 3975
- flesch: 62
- summary: The primary objective and function of the installed bolting elements (rock bolts, long bolts) is not only the transfer of shear and tensile loads acting in the massif, but also the ability to bring a certain degree of stress into the massif and thereby positively affect it (closing microcracks, increasing the shear strength). In the deep coal mines of OKD, Inc., both bolts and long bolts of different designs are used for the rock massif and steel arch support reinforcement.
- keywords: acta; anchorage; applied; barrel; bolting; bolts; cable; cablebolt; coal; conditions; czech; effects; elastic; element; figure; force; friction; inc; individual; initial; input; intensity; ir-6; jack; length; long; longbolts; loss; losses; massif; mca; method; metres; mining; minova; nut; okd; operation; overburden; panel; pillar; polytechnica; rock; room; seam; strand; stress; stressing; support; thread; threaded; time; trial; wedge
- versions: original; plain text
- ap-502
- author: Elnagahy, Farag Ibrahim Younis; Šimák, B.
- title: Wavelet-Based Embedded Rate Scalable Still Image Coders: A review
- date: 2004-01-01
- words: 10128
- flesch: 58
- summary: Reversible wavelet transforms and their appli- cation to embedded image compression. The JPEG2000 standard for still image compression is presented.
- keywords: acta; algorithm; band; bit; bit stream; block; chrominance; coder; coding; coefficients; color; components; compressed; compression; czech; data; decoder; decoding; decomposition; different; encoder; encoding; entropy; ezw; fig; frequency; house; http://ctn.cvut.cz/ap/; ieee; image; image coder; image coding; image compression; information; integer; jpeg2000; level; low; luminance; orientation; original; pass; passes; performance; pixels; plane; polytechnica; prague; process; processing; publishing; quality; quantization; quantizer; rate; real; region; resolution; sample; scalability; scalable; scalable image; scheme; set; significant; snr; space; spatial; spiht; stage; step; stream; structure; sub; symbol; technical; transform; tree; university; vol; wavelet; wavelet coefficients; wavelet transform; zerotree
- versions: original; plain text
- ap-5020
- author: Sysyn, Mykola; Nabochenko, Olga; Kovalchuk, Vitalii; Gerber, Ulf
- title: EVALUATION OF RAILWAY BALLAST LAYER CONSOLIDATION AFTER MAINTENANCE WORKS
- date: 2019-02-28
- words: 6467
- flesch: 49
- summary: Principal scheme of the device for assessing ballast consolidation: 1 – server for signal processing; 2 – Wi-Fi microcontroller unit with ADC; 3 – electrodynamic emitter of pulse acoustic signal shaker –; 4 – seismic sensor SV-20P; 5 – rail; 6 – sleeper; 7 – ballast layer. Keywords: ballast layer consolidation; tamping machines; seismic method; impulse response interpre- tation; signal processing; feature selection; classification; clustering.
- keywords: acta; addition; amplitude; analysis; application; ballast; ballast consolidation; ballast layer; consolidated; consolidation; consolidation degree; data; degree; different; doi:10.1016; dsp; dte; dynamic; edge; edition; elastic; emitter; engineering; evaluation; experimental; features; figure; following; frequency; gerber; impulse; instantaneous; instantaneous frequency; interpretation; kinematic; kovalchuk; laboratory; layer consolidation; leading; lss; machines; maximum; measurements; methods; nabochenko; number; oscillation; passages; periodograms; polytechnica; processing; propagation; quality; railway; railway ballast; receiver; response; results; second; seismic; signal; spectrum; statistical; stone; study; sysyn; tamping; test; time; track; type; unconsolidated ballast; university; value; velocity; wave
- versions: original; plain text
- ap-5030
- author: Vetter, Michael
- title: MODEL-BASED SECURITY ANALYSIS OF FPGA DESIGNS THROUGH REINFORCEMENT LEARNING
- date: 2019-11-01
- words: 4799
- flesch: 49
- summary: We presented a method to generate a Markov Decision Process based reinforcement learning model from a formal, high-level system description (formulated in the domain-specific language FPGASECML.) Keywords: FPGA, IT security, model-driven design, reinforcement learning, machine learning.
- keywords: acta; actions; agent; analysis; approach; attacker; attacks; best; burlap; challenge; code; computer; constraints; cost; cyber; data; decision; deep; design; development; different; domain; episodes; example; expensive; figure; fpga; fpgamodule; fpgasecml; game; grand; implementation; information; learning; limits; low; machine; markov; mdp; methods; minimal; model; multiple; networks; new; number; physical; polytechnica; possible; probabilistic; problem; process; rate; reinforcement; reinforcement learning; representation; reward; runs; scenario; security; sequence; slot; solution; state; steps; storage; success; system; terminal; threat; use
- versions: original; plain text
- ap-504
- author: Brandejský, T.
- title: Implementation of Component-based Simulation Support Tool for Conceptual Design
- date: 2004-01-01
- words: 4279
- flesch: 50
- summary: � � � �� � � � � �� �op N X R op N X N R, _ ,� (2) Binary operator � � � � � �� � � � � � � �� �op N X N X R op N X N X N R1 2 1 2, , _ , ,� (3) � � � � � �� � � � � �� � � � � �op fn X crisp X R crisp X sgltn X op fn X sgltn X f1 2 2 2 1 2, , _ , , ,� � � �� �n R (4) � � � � � �� � � � � �� � � � � �op flv X crisp X R crisp X sgltn X op fn X sgltn X1 2 2 2 1 2, , _ , , ,� � � �� �fn R (5) � � � � � �� � � � � � � �� �op flv X fn X R op flv X fn X fn R1 2 1 2, , _ , ,� (6) � � � � � �� � � � � �� � � �op mifs X crisp X R crisp X sgltn X op mifs X sgltn1 2 2 2 1, , _ , ,� � � � � �� �X mifs R2 , (7) � � � � � �� � � � � � � �� �op mifs X fn X R op mifs X fn X mifs R1 2 1 2, , _ , ,� (8) � � � � � �� � � � � � � �� �op mifs X flv X R op mifs X flv X mifs R1 2 1 2, , _ , ,� (9) � � � � � �� � � � � �� � � �op milv X crisp X R crisp X sgltn X op milv X sgltn1 2 2 2 1, , _ , ,� � � � � �� �X mifs R2 , (10) � � � � � �� � � � � � � �� �op milv X fn X R op milv X fn X mifs R1 2 1 2, , _ , ,� (11) � � � � � �� � � � � � � �� �op milv X flv X R op milv X flv X mifs R1 2 1 2, , _ , ,� (12) � � � � � �� � � � � � � �� �op milv X mifs X R op milv X mifs X mifs In the following text transcription X Y� denotes that X is transformed during evaluation to Y, large chars denotes vari- ables, symbol ‘_’ is used for undefined value, � �op X K X Rn1, , , denotes n-ary operation op, � � � �� �op type X type R, then means unary operation op with argument of type type and with value X and result of type type and value R. Analogously, the form � � � �� �op T X T RR1 , then represents unary operation op with T1 type argument and value X and with the result of TR type and value R. Particular uncertainty description types are denoted by Table 3: 20 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol.
- keywords: algebraic; asked; case; component; conceptual; crisp; crisp x; czech; data; description; design; editor; function; fuzzy; information; linguistic; membership; method; mifs; milv; model; modelling; numbers; operations; possible; prague; r op; relations; representation; result; rules; simulation; support; system; table; technical; tool; type; uncertainty; university; use; value; variables; work; x fn; x mifs
- versions: original; plain text
- ap-5040
- author: Yusuff, Adeyinka S.; Popoola, Lekan T.
- title: OPTIMIZATION OF BIODIESEL PRODUCTION FROM WASTE FRYING OIL OVER ALUMINA SUPPORTED CHICKEN EGGSHELL CATALYST USING EXPERIMENTAL DESIGN TOOL
- date: 2019-02-28
- words: 6166
- flesch: 53
- summary: The 2k factorial experimental design was employed for an optimization of process variables, which include catalyst loading, reaction time, methanol/oil molar ratio and reaction temperature and their effects on the biodiesel yield were studied. The variables (factors) considered were the reaction temperature, reaction time, catalyst loading and methanol/WFO molar ratio.
- keywords: acid; active; al2o3; alumina; analysis; ase; biodiesel; biodiesel production; biodiesel yield; calcined; catalyst; catalyst loading; characterization; cm−1; design; doi:10.1016; effects; eggshell; experimental; factorial; figure; frying; ftir; heterogeneous; high; interaction; loading; maximum; methanol; methyl; min; model; molar; oil; oil molar; olutoye; optimization; point; prepared; process; production; properties; ratio; raw; reaction; reaction temperature; reaction time; sites; solid; stretch; study; surface; synthesis; synthesized; table; temperature; time; transesterification; value; variables; waste; wfo; wt.%; yield; yusuff; ° c
- versions: original; plain text
- ap-5043
- author: Čep, Robert; Malotová, Šárka; Lichovník, Jiří; Hatala, Michal; Legutko, Stanislaw
- title: THE INFLUENCE OF CUTTING CONDITIONS ON THE SELECTED PARAMETERS OF THE SURFACE INTEGRITY
- date: 2018-12-31
- words: 2611
- flesch: 60
- summary: The article deals with an investigation of residual stress in machined surface under conditions of high-feed milling and determination of the influence of machining conditions on the size and types of stress resulting from cutting into the machined surface. Keywords: residual stress; milling; machining; X-ray diffraction; surface integrity.
- keywords: chip; compressive; conditions; cutting; dependence; experiment; feed; figure; high; influence; integrity; machined; machining; material; measurement; milling; parameters; process; ray; research; residual; residual stress; results; roughness; sample; speed; steel; stress; surface; tensile; tool; tooth; university; values; vol
- versions: original; plain text
- ap-5050
- author: Pylypaka, Serhii F.; Klendii, Mykola B.; Nesvidomin, Viktor M.; Trokhaniak, Viktor I.
- title: PARTICLE MOTION OVER THE EDGE OF AN INCLINED PLANE THAT PERFORMS AXIAL MOVEMENT IN A VERTICAL LIMITING CYLINDER
- date: 2019-02-28
- words: 6100
- flesch: 64
- summary: The force F is directed opposite to the direction of sliding, that is to say, opposite to the vector of the absolute velocity of particle motion. In our case, particle motion must be different, since, if an ellipse moves, the angle be- tween a velocity vector and a horizontal plane is alter- nate, besides, the friction force from a cylinder wall acts on a particle.
- keywords: absolute; angle; angular; axis; coefficient; cos; cos(ωt−α; curve; cylinder; differential; direction; disk; element; ellipse; equation; f =; figure; force; fr =; friction; height; inclined; increase; limiting; material; motion; movement; operating; particle; particle motion; plane; projections; reaction; relative; rotates; rotation; segment; sin; sin(ωt−α; sliding; surface; s−1; value; velocity; vertical
- versions: original; plain text
- ap-506
- author: Alawy, A. El-Bassuny; Elnagahy, F. I. Y.; Haroon, A. A.; Azzam, Y. A.; Šimák, B.
- title: Stellar Image Interpretation System Using Artificial Neural Networks:
- date: 2004-01-01
- words: 4422
- flesch: 67
- summary: Filled circles: images identified by Bi-polar function and DAOPHOT-II Open circles, square and triangle: images identified by DAOPHOT-II only 4 Conclusions Some conclusions can be drawn from the present study: Both Uni-polar and Bi-polar functions are good discrimi- nating functions when used in an ANN approach to identify stellar images among the other entities in a CCD frame. Recently, we have developed two approaches employing Artificial Intelligence techniques to recognise stellar images [10] besides deriving all relevant astronomical data [11].
- keywords: acta; anns; approach; artificial; astronomical; case; ccd; cluster; code; cosmic; czech; daophot; data; entities; error; fig; frame; function; house; http://ctn.cvut.cz/ap/; images; learning; m67; neural; noise; open; output; paper; pattern; photometry; pixel; polar; polytechnica; prague; present; publishing; results; set; star; stellar; system; table; technical; university; values; vol
- versions: original; plain text
- ap-5063
- author: Szajewska, Marzena; Tereszkiewicz, Agnieszka Maria
- title: MULTIDIMENSIONAL HYBRID BOUNDARY VALUE PROBLEM
- date: 2018-12-31
- words: 7837
- flesch: 85
- summary: + k 3 C c (x )S 2a + 2b + c (1 − x )S 2b + c (z )− k 3 C c (x )S 2b + c (1 − x )S 2a + 2b + c (z ) C c (1 − x )C 2b + c (z )C 2a + 2b + c (x )+ C c (1 − x )C 2b + c (x )C 2a + 2b + c (z ) S c (z ) F 3 2( C 3a + 2b (y )+ C 3a + b (y )+ C b (y ))
- keywords: + √; 1√2; boundaries; boundary; branching; c b; c c; c(x; case; condition; constants; equation; families; finite; functions; fundamental; groups; helmholtz; hybrid; lie; math; new; normal; patera; problem; reflection; region; root; s b; s c; separation; simple; special; value; vectors; vol; − √
- versions: original; plain text
- ap-5070
- author: Sellitto, Miguel Afonso
- title: LEAD-TIME, INVENTORY, AND SAFETY STOCK CALCULATION IN JOB-SHOP MANUFACTURING
- date: 2018-12-31
- words: 4735
- flesch: 64
- summary: LTi – lead-time of order i; LT m – mean order LT ; LTσm – standard deviation of the order LT ; LT mw – mean part LT ; Qi – amount of value added by order i; ∑n i=1 Qi – total amount dispatched by all orders; LTσw – standard deviation of the part LT ; RI m – mean arrival rate of orders or parts; WIP m – mean WIP; Pm – mean throughput; ∆Tmax – maximum time elapsed between the arrival of two successive orders. The purpose of this article is to present a method for calculating the lead-time, the inventory, and the safety stock or buffer in job shop manufacturing, which are essentially stochastic variables.
- keywords: application; arrival; calculation; close; company; completion; control; data; days; econ; figure; furniture; high; i=1; industry; int; inventory; job; lead; level; manufacturing; mean; method; models; mto; order; parts; production; regression; research; safety; sets; shop; size; stock; system; time; wip; wlc; workload
- versions: original; plain text
- ap-508
- author: Tuncer, I. H.; Kay, M.
- title: Optimization of Flapping Airfoils for Maximum Thrust and Propulsive Efficiency
- date: 2004-01-01
- words: 3513
- flesch: 57
- summary: The flapping motion of the airfoil in combined plunge, h, and pitch, �, is specified by � �h h t� � 0 cos � , � �� �� � �0 cos � �t , where the angular frequency � is given in terms of the reduced frequency, k c U� �� . O D where � � � � � � �� � � O
- keywords: acta; aiaa; airfoil; amplitude; angle; attack; case; coefficient; czech; edge; efficiency; fig; flapping; flow; function; grid; jones; leading; maximum; motion; objective; optimization; overset; parallel; pitch; platzer; plunge; polytechnica; propulsive; steps; technical; thrust; university; unsteady; variables; vol
- versions: original; plain text
- ap-510
- author: Végh, L.
- title: The Psychological Image of Realistic Physical Quantities. The Psychological Speed of Aging
- date: 2004-01-01
- words: 3431
- flesch: 52
- summary: Psychological physical quantities – PQ (PPQ). Psychological quantities (the designa- tion of psychological images of real quantities) are actually necessary components of our decision making.
- keywords: age; aging; calendar; conditions; czech; dependence; different; example; external; function; images; individual; length; max; phenomena; physical; physical quantities; possible; ppq; psa; psychological; psychological images; psychological quantities; quantities; quantity; real; rpq; speed; technical; time; tpx; units; university; values; vpx
- versions: original; plain text
- ap-5105
- author: Kruschwitz, Jens; Lind, Martin; Muntean, Adrian; Richardson, Omar; Wondmagegne, Yosief
- title: MODELLING, SIMULATION AND PARAMETER IDENTIFICATION OF ACTIVE POLLUTION REDUCTION WITH PHOTOCATALYTIC ASPHALT
- date: 2019-02-28
- words: 4467
- flesch: 58
- summary: In this paper, we report on the use of numerical simulations to mimic the effect of the presence of a street paved with photocatalytic asphalt has on the NO reduction in the local ambient. Advanced solar photocatalytic asphalt for removal of vehicular NOx.
- keywords: acta; air; asphalt; concentration; conditions; cross; data; diffusion; doi:10.1016; effects; emission; environment; figure; identification; initial; kiel; level; measured; measurements; model; modelling; muntean; nox; parameters; period; photocatalytic; pollutant; pollution; polytechnica; problem; process; radiation; reaction; reduction; reference; s(t; section; setting; simulated; simulation; solar; term; time; traffic; urban; use; value; vehicle; wind
- versions: original; plain text
- ap-512
- author: Belyaev, B. A.; Leksikov, A. A.; Ovchinnikov, S. G.; Kraus, I.; Parshin, A. S.
- title: Magnetic Technique for Nondestructive Evaluation of Residual Stresses
- date: 2004-01-01
- words: 3851
- flesch: 55
- summary: It is very important that the low-frequency modulating magnetic field with frequency © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 43 Czech Technical University in Prague Acta Polytechnica Vol. Layout of MW detector of magnetic field 1 kHz present in the spectrometer acts as “a magnetic shake- -up”, due to which the recurrence of good results for repeated measurements is ensured.
- keywords: area; axis; czech; dependence; detector; direction; distribution; elastic; ferromagnetic; field; fig; film; grinding; inhomogeneities; local; magnetic; magnetic field; magnetization; magnetizing; measured; measurements; measuring; quantity; reversal; reversal field; sample; stray; stray fields; stresses; surface; sweep; technical; technique; tmf; treatment; university; vol
- versions: original; plain text
- ap-514
- author: Ponce, A. Noriega; Behar, A. Aguado; Hernández, A. Ordaz; Sitar, V. Rauch
- title: Neural Networks for Self-tuning Control Systems
- date: 2004-01-01
- words: 2986
- flesch: 61
- summary: In this case, instead of the net output error: � � � � � �e t u t u tu d� � (1) it is used the process output error: � � � � � �e t Applying the chain rule, we get: � � � � � � � �� � � � � � � � � � � � E t v E t e e e e u t u t r r vj y y u u j � � � � � (10) � � � � � � � �� � � � � � E t v e e e u t u t h j y y u j� � � � � � � �1 1 (11)
- keywords: algorithm; closed; coefficients; control; e e; e t; e u; e y; error; fig; layer; learning; loop; means; net; neural; output; paper; process; regulator; self; t t; time; u t; value; weighting; y u
- versions: original; plain text
- ap-516
- author: Zadražil, T.; Vodák, F.; Kapičková, O.
- title: Effect of Temperature and Age of Concrete on Strength – Porosity Relation
- date: 2004-01-01
- words: 2519
- flesch: 65
- summary: AP04_1.vp 1 Introduction As known from experimental studies of concrete behav- iour at room temperature, there is a close correspondence between compressive strength S and its porosity P. Commonly this dependence is decreasing function, i.e. strength S de- creases with porosity P. The present paper is based on the assumption that changes in porosity P are the main factor effecting changes in compressive strength S of hardened cement pastes and con- crete (see, e.g., [2]).
- keywords: age; cement; composition; compressive; concrete; czech; days; dependence; effect; fig; high; house; porosity; prague; properties; ratio; s s; s(p; samples; specimens; strength; structure; technical; temperature; university; vodák; vol
- versions: original; plain text
- ap-5173
- author: Kačur, Ján; Durdán, Milan; Laciak, Marek; Flegner, Patrik
- title: A COMPARATIVE STUDY OF DATA-DRIVEN MODELING METHODS FOR SOFT-SENSING IN UNDERGROUND COAL GASIFICATION
- date: 2019-08-31
- words: 21937
- flesch: 72
- summary: Proposal of Neural network considered for UCG data prediction. The piecewise-linear type of MARS models better fits the training data but, in the prediction on un- trained data, better results with the piecewise-cubic type of the model (see Table 4) are obtained.
- keywords: 4/2019; acta; activities; adaptive; air; algorithm; analysis; basis; bed; best; better; bf11; bf14; bf3; bf4; bf5; bf8; bf9; bfs; c o; c(x1; c(x2; c(x3; calculated; calorific; case; coal; coefficient; combustion; comparative; composition; concentration; conditions; conference; control; cubic; data; determined; different; dimensional; doi:10.1109; durdán; equation; error; experiment; figure; flegner; flow; following; forward; function; gasification; gaussian; gradient; hidden; high; highest; i=1; ieee; index; input; international; k(xi; kačur; kernel; laciak; layer; learning; linear; lowest; machine; mars; mars model; max(0; measured; measurement; methods; model; modeling; monitoring; multivariate; network; neural; neurons; non; number; observations; optimal; optimization; order; outlet; output; oxygen; paper; parameter; performance; phase; piecewise; polytechnica; possible; prediction; pressure; process; propagation; r2yy; reactor; real; regression; results; ryy; sensing; series; set; situ; soft; space; splines; statistical; study; support; svr; syngas; table; target; temperature; terms; test; testing; tightness; time; training; type; ucg; underground; value; variables; vector; vol
- versions: original; plain text
- ap-518
- author: Sopko, V.; Trtík, K.; Vodák, F.
- title: Influence of ? Irradiation on Concrete Strength
- date: 2004-01-01
- words: 952
- flesch: 63
- summary: It concerns neutrons and gamma irradiation acting on concrete construc- tions and accelerating their surface and internal changes. Of the irradiation spectrum we will observe only influ- ence of gamma irradiation.
- keywords: beams; composition; concrete; czech; decrease; dose; dosimeters; experiment; fig; gamma; irradiation; kgy; nuclear; strength; technical; test; university; vol
- versions: original; plain text
- ap-5194
- author: Haider, Haider Tarish; Muhsen, Dhiaa Halboot; Shahadi, Haider Ismael; See, Ong Hang; Elmenreich, Wilfried
- title: DYNAMIC SMART GRID COMMUNICATION PARAMETERS BASED COGNITIVE RADIO NETWORK
- date: 2019-07-01
- words: 6966
- flesch: 52
- summary: Trust based reliable transmission strategies for smart home energy management in cognitive radio based smart grid. 2. Cognitive radio parameters The CR provides the ability to sense the surrounding wireless environment periodically and to adapt the transmission parameters appropriately according to the objectives for the optimal utilization of spectrum bands [29].
- keywords: acta; algorithm; applications; architecture; bands; ber; blm; channel; cognitive; cognitive radio; communication; communication mode; convergence; crde; crossover; data; decision; differential; doi:10.1016; dynamic; ecm; energy; engine; environment; evolution; fast; figure; fitness; function; generations; grid; grid communication; haider; han; high; home; htm; management; maximum; method; minimum; mode; modulation; multi; multiple; mutation; networks; number; objective; optimal; optimization; parameters; performance; polytechnica; power; problem; psk; psm; pso; qam; radio; rate; results; saving; scheme; score; selection; single; smart; smart grid; solutions; spectrum; system; table; throughput; time; transmission; transmission parameters; transmit; vector; weighting; wireless
- versions: original; plain text
- ap-520
- author: Šimáně, Č.; Vognar, M.; Chvátil, D.
- title: The System for Control and Stabilization of the Beam Position in the Microtron MT-25 in Prague
- date: 2004-01-01
- words: 3250
- flesch: 52
- summary: Therefore a system has been designed, which will be used in the future electron transmission line, with wire probes, which can be removed from the beam after the alignment procedure has been accomplished. From the same reason the determination of the correct chan- nel position by differential wire probes, which has been tried too, gave not satisfactory results.
- keywords: alignment; amplifier; axis; beam; beam position; chamber; channel; control; current; czech; departure; electron; electron beam; emission; extraction; fig; horizontal; load; magnetic; microtron; noise; orbit; orifice; output; path; position; prague; probe; resistor; secondary; secondary electron; space; stabilization; system; technical; transport; university; wire; wire probe
- versions: original; plain text
- ap-522
- author: Murray-Smith, D. J.
- title: Biological Systems Thinking for Control Engineering Design
- date: 2004-01-02
- words: 5862
- flesch: 45
- summary: If re- cruitment of motor units is the most significant factor in the development of tension in intact muscle this feature must be incorporated into neuromuscular control system models. Keywords: biology, control systems, design, neuro-muscular system.
- keywords: action; active; activity; adaptive; applied; artificial; biological; biological systems; central; changes; closed; complex; conditions; control; control system; design; development; dynamic; elements; engineering; experimental; features; feedback; fibres; form; frequency; fusimotor; gamma; human; important; increase; input; intrafusal; length; levels; load; loop; main; models; motoneurones; motor; muscle; muscle spindle; nerve; nervous; neural; neuromuscular; neuromuscular control; neuromuscular system; nonlinear; number; output; overall; pathways; present; primary; properties; pulse; receptors; reflex; response; robots; sensory; signal; single; spindle; stretch; system; tendon; tension; terms; thinking; types; units; university; vol
- versions: original; plain text
- ap-5222
- author: Pačák, Tomáš; Tatíček, František; Valeš, Michal
- title: COMPENSATION OF SPRINGBACK IN LARGE SHEET METAL FORMING
- date: 2019-11-01
- words: 3598
- flesch: 55
- summary: The methodology consists of three main parts: correct settings of virtual forming process (numerical simulation), springback analysis and springback compensation. The methodology was verified through a process of a numerical simulation, springback analysis and comparison with the reference geometry.
- keywords: accuracy; accurate; analysis; approach; bending; body; car; compensation; complex; description; fifth; figure; final; forming; geometry; help; large; main; material; metal; methodology; numerical; outer; parts; phenomenon; plastic; press; process; production; ratio; results; settings; shape; sheet; simulation; solution; springback; springback analysis; springback compensation; stamping; strategy; time; tools; use; verification; virtual
- versions: original; plain text
- ap-524
- author: Lazim, Tholudin Mat; Mat, Shabudin; Saint, Huong Yu
- title: Computational Fluid Dynamic Simulation (CFD) and Experimental Study on Wing-external Store Aerodynamic Interference
- date: 2004-01-02
- words: 3151
- flesch: 49
- summary: 5: Model installation inside the wind tunnel a) b) c) Fig. 6: CFD model surface meshes: a) mesh for wing in tunnel, 111 239 elements, b) mesh for wing in tunnel, 221 112 elements, c) mesh for wing and store in tunnel, 122 158 elements - 0.8 - 0.6 - 0.4 - 0.2 0 0.2 0.4 0.6 - 0.2 0 0.2 0.4 0.6 0.8 1 1.2 x/c - C p coarse grid -lower coarse grid - upper fine grid - upper fine grid - lower Fig. 6c shows the simulation for wing with external storage with 122 158 elements.
- keywords: -0.2; -0.4; aerodynamic; aircraft; analysis; cfd; clean; coefficient; computational; configuration; distribution; experimental; external; external store; fig; fighter; flow; fluid; geometry; interference; journal; lower; lower surface; mid; model; pressure; results; section; simulation; software; span; st1; st2; st3; storage; store; study; surface; testing; tunnel; upper; upper surface; vol; wind; wing
- versions: original; plain text
- ap-526
- author: Sibilski, K.
- title: Dynamics of Micro-Air-Vehicle with Flapping Wings
- date: 2004-01-02
- words: 5533
- flesch: 58
- summary: From (18) we have the following relation: �� � �q A q w A w� �T T (20) Finally, the Appel function has the following form: S , , , t w w T w w w * � � �q w w w M h M w M h� � �� � 1 2 1 1 (21) where M q A M Aw T T q T� , and h q w A M A hw TT q T q, � �� . Functional S for the i-th element of the mechanical system is given by the equation [16]: S mi i i V i � ��� 1 2 � �v v� d (2) where �vi means the vector of absolute acceleration of ele- mentary mass dmi of the i-th body of the dynamical system considered (Fig. 2): � �v vi
- keywords: acta; aerodynamic; air; aircraft; animal; attack; axis; birds; body; control; czech; degrees; design; downstroke; dynamics; element; entomopter; equations; feathering; fig; flapping; flight; flying; following; forces; form; freedom; high; house; http://ctn.cvut.cz/ap/; insect; kinematics; lagging; large; lift; low; mavs; means; method; micro; models; module; motion; non; number; pietrucha; polytechnica; publishing; results; reynolds; sibilski; simulation; small; software; ssef; system; t t; technical; university; unsteady; upstroke; vector; vehicles; velocity; vol; w �; wing
- versions: original; plain text
- ap-5264
- author: Chrášťanský, Lukáš; Šanovec, Jan; Martawirya, Yatna Yuwana; Valeš, Michal
- title: APPLICABILITY VERIFICATION OF AUTOFORM SOFTWARE FOR FEM SIMULATION OF MECHANICAL FIXATION OF HEMMED JOINTS
- date: 2019-12-31
- words: 3058
- flesch: 57
- summary: Simulation results from Autoform R6 for UD2 strategy (a – width of profile in mm; b – isometric view; c – FLD) Simulation results from Autoform R6 after applying the Law of Similarity (a – width of profile in mm; b – isometric view; c – FLD)
- keywords: applicability; application; autoform; body; car; dimensions; fem; figure; fixation; grooving; hemmed; hemming; inner; joint; law; material; mechanical; metal; method; necessary; original; outer; parts; patent; possible; process; production; results; sheet; similarity; simulation; software; specific; stamping; strategy; table; use; verification
- versions: original; plain text
- ap-5266
- author: Kononenko, Serhii; Dobrotvorskiy, Sergey; Basova, Yevheniia; Gasanov, Magomediemin; Dobrovolska, Ludmila
- title: DEFLECTIONS AND FREQUENCY ANALYSIS IN THE MILLING OF THIN-WALLED PARTS WITH VARIABLE LOW STIFFNESS
- date: 2019-07-01
- words: 4980
- flesch: 57
- summary: Directional cutting force model To determine the forces acting in the cross section of the sample, as the most influencing factors of undesir- able deflections, it is necessary to define the compo- nents of the cutting forces Fig. Sample deflection at point 1 and 2 by 0.17984 mm and 0.15186 mm respectively.
- keywords: acta; amplitude; analysis; angle; basova; blades; calculation; components; critical; cutter; cutting; deflection; deviations; different; dobrotvorskiy; dynamic; element; end; engineering; fig; figure; finite; force; frequency; frequency analysis; geometry; harmonic; high; kononenko; machining; material; maximum; mechanical; methods; milling; model; natural; number; oscillations; parameters; parts; point; polytechnica; processing; research; resonance; response; response analysis; result; sample; section; speed; stiffness; surface; system; technological; thin; time; tool; undesirable; values; variable; walled
- versions: original; plain text
- ap-528
- author: Ota, M.; Jelínek, I.
- title: The Role of CAD in Enterprise Integration Process
- date: 2004-01-02
- words: 3750
- flesch: 55
- summary: Enter- prise integration processes are related to the integration of enterprise software systems The data special parts created by CAD systems are product oriented data.
- keywords: acta; application; approach; cad; cax; communication; companies; computer; czech; data; day; design; eip; eis; enterprise; environment; extensible; fig; file; house; http://ctn.cvut.cz/ap/; information; integrated; integration; intensive; internet; level; manufacturing; model; open; ota; pdm; polytechnica; portal; present; problem; processes; product; program; publishing; queries; software; supported; system; technical; technologies; university; user; vol
- versions: original; plain text
- ap-530
- author: Petrov, A. V.; Stepanov, Y. G.; Shmakov, M. V.
- title: Development of a Technique and Method of Testing Aircraft Models with Turboprop Engine Simulators in a Small-scale Wind Tunnel - Results of Tests
- date: 2004-01-02
- words: 3110
- flesch: 42
- summary: 44 No. 2/2004 0 0,5 1 2 2.5 3 3.5 - 10 0 10 20 �� CL B=2.0 B=1.0 B=0 B=2.0 B=1.0 B=0 - 0.4 - 0.2 0 0,2 0.4 - 10 0 10 20 �� C M - 0.07 - 0.06 - 0.05 - 0.04 - 0.03 - 0.02 - 0.01 0 0.01 - 10 - 5 0 5 10 15 20 �� C N 1.5 Fig. 3: Longitudinal aerodynamic characteristics Takeoff configuration � f Tx� � � �25 25 0 25; . - 0.05 - .0 04 - .0 03 - .0 02 - .0 01 0 0 01. 0 02. 0 03. 0 04. 0.05 - 20 - 15 - 10 - 5 0 5 10 15 20 �� c N B=1.0 B=0 B=2.0 B=2.8 Fig. 4: Lateral aerodynamic characteristics � � � f R � � � � � � 25 5 0 ficient B; in this case the region of maximum increments of the yawing moment shifts towards negative angles of sideslip � � �5 through �10 deg), i.e. in the direction of rotation of the propellers (Fig. 5). It consists of two parts: 1) determination of the isolated model power plant thrust; 2) a test methodology for the full aircraft model with two running Ps. 3.1 Methodology for measuring of Ps thrust The methodology is based on measurements of the forces and moments with mechanical balances AB-102 acting on an isolated nacelle with Ps on and off and elimination of the influence of the supporting devices and communications by using calculation and experimental methods. Determined as a result of balance measurements carried out at flow velocities of V� � 0–45 m/s, Ps speeds n � 0–6500 1/min and blade setting angles of �B � 13.3–29.44 deg were: � available range of thrust P and thrust coefficient � �s s sP n D� � 2 4, � available range of blade loading coefficient B P q Ds� �0 25 2. � , � possible range of Ps advances ratio � s s sV n D� � , � requirement power Ns and power coefficient �s range, where N Ms s� , � � � �s s s s s s sN n D M n D� �� � 3 5 2 52 , V�, q�, �� – free stream parameters, ns – propeller speed, l/s – propeller angular velocity, �� 2 n s, Ms – torque moment on the Ps shaft.
- keywords: aerodynamic; aircraft; angles; attack; blade; characteristics; coefficient; deg; directional; effectiveness; engine; fig; flow; increases; interaction; landing; left; loading; longitudinal; methodology; model; moment; power; propeller; range; results; rotation; running; slipstreams; stability; tail; takeoff; test; thrust; tunnel; twin; values; wind; wing; � �
- versions: original; plain text
- ap-532
- author: Vroom, R. W.; van Breemen, E. J. J.; van der Vegte, W. F.
- title: Developing a Conceptual Design Engineering Toolbox and its Tools
- date: 2004-01-02
- words: 6511
- flesch: 54
- summary: [3] Roozenburg N. F. M., Eekels J.: Product design: fundamen- tals and methods. [14] Kitamura Y., Mizoguchi R.: “Ontology-based descrip- tion of functional design knowledge and its use in a func- tional way server.”
- keywords: acta; approach; aspects; available; balanced; behaviour; bin; comprehension; computer; conceptual; conceptual design; criteria; delft; design; design engineering; designer; det; development; early; engineering; engineers; entrance; environment; example; house; http://ctn.cvut.cz/ap/; information; integrated; knowledge; links; modelling; models; need; ontology; order; output; phase; polytechnica; possible; process; processes; procs; product; prototype; publishing; research; resource; results; search; simulation; site; specific; stage; structure; support; system; technical; toolbox; tools; university; use; users; van; vol; way; work
- versions: original; plain text
- ap-534
- author: Valášek, M.; Steinbauer, P.; Šika, Z.; Zdráhal, Z.
- title: Knowledge Support of Simulation Model Reuse
- date: 2004-01-02
- words: 3596
- flesch: 46
- summary: Then we describe the development of simulation model of the TriJoint machine tool as a reuse development where the simulation model of Dyna-M is reused. Keywords: Simulation model, reuse, knowledge management, machine tool.
- keywords: acta; approach; case; ckmt; clockwork; conceptual; czech; developed; development; dyna; engineering; fig; indexing; informal; knowledge; level; machine; methodology; model; modeling; new; object; partner; physical; polytechnica; process; real; real world; reuse; search; semantic; simulation; simulation model; support; system; technical; tool; trijoint; university; vol; world; world object
- versions: original; plain text
- ap-536
- author: Studničková, M.
- title: The Effect of Pedestrian Traffic on the Dynamic Behavior of Footbridges
- date: 2004-01-02
- words: 2513
- flesch: 54
- summary: f t G f t G f t � � � � � � � 1 2 2 3 3 2 4 6 sin sin sin � � � � � p p p (1) where G Weight of a person (usually G � 800 N) [N] (2) for horizontal vibrations � � � �F t k f f tph h h h� 70 2sin �
- keywords: acceleration; acceptance; acta; analysis; bending; calculated; computational; criteria; czech; damping; design; dynamic; fig; footbridge; force; frequencies; frequency; harmonic; horizontal; house; http://ctn.cvut.cz/ap/; load; mode; natural; pedestrians; people; polytechnica; publishing; response; results; sin; structure; technical; university; value; vertical; vibrations; vol; walking
- versions: original; plain text
- ap-5374
- author: Ficker, Tomáš
- title: GENERAL MODEL OF RADIATIVE AND CONVECTIVE HEAT TRANSFER IN BUILDINGS: PART I: ALGEBRAIC MODEL OF RADIATIVE HEAT TRANSFER
- date: 2019-07-01
- words: 7496
- flesch: 65
- summary: 1. Introduction Heat radiation represents a dominant transfer mechanism of heat energy inside buildings. Although the presented application of the radiosity method has been aimed at heated large-area floors, the method may also be applicable to radiant heat energy emitted by small-area radiant panels often used in housing dwellings.
- keywords: acta; algebraic; application; buildings; ceiling; closed; convective; doi:10.1016; emitted; enclosure; energies; energy; envelopes; eqs; equations; exchange; factors; fji; floor; flows; flux; general; grey; heat; heat transfer; heating; i=1; j=1; losses; matrix; method; model; new; numerical; open; polytechnica; quasi; radiant; radiation; radiative; radiative heat; radiosities; radiosity; room; row; rule; section; simple; space; sum; surface; system; temperatures; thermal; total; transfer; values; view; walls; york; zero; εeb; φi↔j
- versions: original; plain text
- ap-5375
- author: Ficker, Tomáš
- title: GENERAL MODEL OF RADIATIVE AND CONVECTIVE HEAT TRANSFER IN BUILDINGS: PART II: CONVECTIVE AND RADIATIVE HEAT LOSSES
- date: 2019-07-01
- words: 8416
- flesch: 61
- summary: Keywords: Convective heat transfer, radiative heat transfer, room envelope, heat losses, iterative optimization. 3/2019 Model of radiative and convective heat transfer in buildings: Part II Heat transferred by convection (Nusselt’s number Nu
- keywords: acta; air; buildings; calculations; case; ceiling; characteristic; coefficients; cold; conduction; convective; convective heat; correlation; differential; energy; eqs; equations; exterior; external; ficker; floor; flow; following; free; functions; heat; heat losses; heat transfer; heat transport; horizontal; hsi3; interior; internal; laminar; larger; losses; method; model; nul; number; numerical; nusselt; polytechnica; radiation; radiative; radiative heat; ral; rayleigh; results; room; sides; sky; standard; surface; system; tab; temperatures; thermal; transfer; transport; tse2; tse3; tsi1; tsi2; tsi3; turbulent; values; w/(m2k; walls
- versions: original; plain text
- ap-538
- author: Fošumpaur, P.; Satrapa, L.
- title: Control of Systems of Reservoirs with the Use of Risk Analysis
- date: 2004-01-02
- words: 2418
- flesch: 51
- summary: In the field of controlling of reservoirs systems, it is often very difficult to formulate a reliable system of criteria. A system of reservoirs serves many purposes, which result from the basic functions of water reservoirs: storage, flood control and environmental functions.
- keywords: active; analysis; approach; capacity; control; criteria; czech; dam; dams; design; elements; failure; fig; flood; fuzzy; hazards; hydropower; level; multi; objective; optimisation; order; particular; phase; production; purposes; recreation; reservoirs; risk; set; storage; structures; system; theory; time; use; vol; water
- versions: original; plain text
- ap-5381
- author: Koska, Lukáš; Jadlovská, Slávka; Vošček, Dominik; Jadlovská, Anna
- title: INVERTED PENDULUM WITH LINEAR SYNCHRONOUS MOTOR SWING UP USING BOUNDARY VALUE PROBLEM
- date: 2019-11-01
- words: 5104
- flesch: 54
- summary: [12] contains algorithms enabling inverted pendulum control in the hybrid control struc- ture, i.e. by switching between the swing-up and sta- bilizing control algorithm. The development of the IPMaC as a framework for solving analysis/control problems of inverted pendulum systems also enabled us to unify and generalize the nomenclature and la- belling of input/output/state variables and physical 458 https://doi.org/10.14311/AP.2019.59.0458 https://ojs.cvut.cz/ojs/index.php/ap http://matlab.fei.tuke.sk/underactuated http://matlab.fei.tuke.sk/underactuated vol.
- keywords: algorithm; boundary; bvp; cart; control; control algorithm; design; dynamics; equation; equilibrium; feedback; feedforward; fig; figure; form; free; function; input; inverted; inverted pendulum; ipmac; jadlovská; laboratory; library; linear; mathematical; model; nonlinear; paper; parameters; pendulum; pendulum swing; pendulum system; planning; point; pole; position; problem; simulation; solution; state; structure; swing; system; time; tracking; trajectories; trajectory; underactuated; value; velocity; vošček; weight; θ0(t; θ1(t; θ∗0; θ∗1
- versions: original; plain text
- ap-5393
- author: Hynek, Petr; Kreibich, Viktor; Firt, Roman
- title: SUITABLE PRODUCTION TOOLS SELECTION WITH THE USE OF EVOLUTIONARY ALGORITHMS
- date: 2020-03-02
- words: 3053
- flesch: 60
- summary: This matrix generates a set of several numbers of solutions depending on other parameters, such as the lowest price, the lowest number of used welding guns, etc. Based on the simulation results, a matrix, which defines the possibility of using given manufacturing tools (in this case welding guns are considered) to connect the plates using the electrical resistance spot welding process, is created.
- keywords: acta; algorithms; analysis; availability; case; chromosome; combination; configuration; design; evolutionary; figure; genetic; guns; ideal; lowest; matrix; method; mutation; necessary; need; number; optimization; points; polytechnica; possible; price; process; production; result; selection; set; simulation; software; solution; solver; suitable; system; task; tools; types; use; variables; welding; welding guns
- versions: original; plain text
- ap-5395
- author: Luňáčková, Barbara; Mohyla, Marek; Pinka, Miroslav
- title: THE EFFECT OF SOIL GRAIN SIZE ON THE DEFORMATION PROPERTIES OF REINFORCED GEOCELL LAYERS
- date: 2019-11-01
- words: 3640
- flesch: 55
- summary: Many researchers have observed the bearing capac- ity of geocell reinforced soils (e.g., [5, 6, 15, 16, 18–20]). Regrettably, the light dynamic load plate test proved to be unsuitable for geocell systems.
- keywords: 0/8; acta; aggregate; aspect; aspect ratio; backfill; bearing; capacity; characteristics; crushed; czech; deformation; deformation modulus; dimensions; doi:10.1016; effect; experiment; figure; geocell; grain; gravel; greater; layer; load; loading; materials; medium; model; modulus; plate; polytechnica; ratio; reinforcement; results; sand; second; settlement; size; soil; stage; static; strength; study; subsoil; system; test; unreinforced; values
- versions: original; plain text
- ap-5399
- author: Solnař, Stanislav; Dostál, Martin
- title: HEAT FLUX JUMP METHOD AS A POSSIBILITY OF CONTACTLESS MEASUREMENT OF LOCAL HEAT TRANSFER COEFFICIENTS
- date: 2019-08-31
- words: 6617
- flesch: 64
- summary: Heat transfer coefficients cause a temperature field to form on the thin plate, which can then be used to calculate local heat transfer coefficient values. Keywords: Heaviside function, heat transfer coefficient, experimental method, heat jump method.
- keywords: = l; acta; analytical; application; biδ; boundary; calculated; calculation; camera; change; coefficient; condition; cosh; data; derivation; differential; dostál; equation; experimental; figure; flow; flux; freund; function; general; hand; heat; heat transfer; initial; inverse; k−1; laplace; local; measured; measurement; method; m−2; new; numerical; oscillation; partial; polytechnica; problem; results; s sinh; sinh; solution; sqrt; surface; system; task; temperature; thickness; time; transfer; transfer coefficient; transformation; values; variable; wall
- versions: original; plain text
- ap-540
- author: Zagursky, V.; Zarumba, I.; Riekstinsh, A.
- title: A coding and On-Line Transmitting System
- date: 2004-01-02
- words: 1809
- flesch: 59
- summary: The digital circuits substitute time interval T1 by two short pulses, called START and STOP, which define the starting and finishing moments of time interval T1. The transmitter (see Fig. 1) has 64 identical voltage to time interval converters.
- keywords: accuracy; acquisition; channels; circuits; control; conversion; data; device; digital; fig; high; hold; input; interval; logic; measurements; mode; number; parallel; possible; pulses; receiver; sample; signal; start; stop; system; time; transmission; transmitter; university; vol
- versions: original; plain text
- ap-5414
- author: Al-Rkaby, Alaa Hussein Jassim
- title: EVALUATING SHEAR STRENGTH OF SAND- GGBFS BASED GEOPOLYMER COMPOSITE MATERIAL
- date: 2019-08-31
- words: 3510
- flesch: 58
- summary: In addition to the strength properties, studies car- ried out on geopolymer based soil showed that treated soils have a high durability At this percentage, the UCS of low strength clay and high swelling clay increased by 4.7 and 3.3 times respectively [15].
- keywords: activator; alkaline; ash; blast; civil; clay; composite; compression; content; different; doi:10.1016; dry; engineering; figure; fly; furnace; geopolymer; ggbfs; ground; high; hydroxide; improvement; journal; kpa; low; materials; maximum; particles; performance; ratio; results; rkaby; samples; sand; significant; silicate; similar; slag; sodium; soil; strength; study; times; triaxial; ucs; unconfined; variation; weight
- versions: original; plain text
- ap-542
- author: Zagursky, V.; Riekstinsh, A.
- title: Speech Signal Recovery in Communication Networks
- date: 2004-01-02
- words: 2689
- flesch: 60
- summary: For X X Xi i i� �� �0 5 1 1. ( ) the mean square error will be: � �E R R R mi XX XX XX( ) . Then, in accordance with (1), the mean square error will be: � �� � � �E E X X m R R mi i XX XX
- keywords: adaptive; case; correlation; end; error; interpolation; loss; losses; lost; mean; networks; non; order; packet; permutation; procedure; receiving; recovery; results; reverse; samples; second; sequence; signal; sounds; source; speech; square; transmission; use; vol
- versions: original; plain text
- ap-544
- author: Čulík, J.
- title: Simulation of Scoliosis Treatment Using a Brace
- date: 2004-01-02
- words: 4508
- flesch: 68
- summary: The spinal curvature is stored in the computer as the following three functions � � � � � �y y x z z x x� � �, , � � , (1) where � is the turning based on the x-axis. i i i� � � � � �� � � � �� � � � � �, , ,1 1 1 1 1, (7) M M Z a M M Z a Z Z Z
- keywords: algorithm; axis; brace; calculated; child; child´s; computer; correction; curvature; czech; deformation; disc; displacement; fig; form; inter; k k; k l; l l; matrix; patient; plaster; positive; prague; ray; scoliosis; simulation; soft; spinal; spine; state; stiffness; stress; surface; technical; time; tissue; treatment; trunk; type; university; vertebral; vol
- versions: original; plain text
- ap-546
- author: Dušek, J.; Dostálek, M.
- title: Image Analysis of Eccentric Photorefraction
- date: 2004-01-02
- words: 2372
- flesch: 53
- summary: 5 Conclusions We have designed a universal system for measuring of synkinetic reaction (accommodation and convergence) based on I. PI position and eccentric photorefraction. Image analysis of the recorded sequences is performed in order to obtain curves of basic eye reactions (accommodation and convergence).
- keywords: accommodation; analysis; automatic; average; camera; convergence; curve; czech; difference; eccentric; eye; fig; fixation; horizontal; image; lens; light; measuring; method; monitors; noninvasive; number; photorefraction; picture; pixels; point; position; purkynje; roi; source; step; summation; system; technical; university; value; vol
- versions: original; plain text
- ap-5475
- author: Yusuff, Adeyinka Sikiru; Ewere, Donatus
- title: EXTRACTION AND EVALUATION OF OIL FROM GREEN ALGAE CLADOPHORA GLOMERATA BY HEXANE/ETHER MIXTURE
- date: 2020-04-30
- words: 3710
- flesch: 58
- summary: The pH value of the algal oil was determined to be 7.18 ± 0.01 and this indicates that the oil is neutral, which is in an agreement with previous studies on oil extraction from algae by many researchers References [1] A. Yusuff, M. Lala, L. Popoola, O. Adesina. Optimization of oil extraction from Leucaena leucocephala seed as an alternative low-grade feedstock for biodiesel production.
- keywords: acid; algal; algal oil; analysis; biodiesel; biofuel; biomass; characterization; cladophora; content; doi:10.1016; effect; energy; extraction; extraction temperature; fatty; feedstock; generation; glomerata; green; hexane; high; increase; method; oil; oil extraction; oil yield; particle; physicochemical; process; production; profile; properties; rate; results; seed; size; solvent; sources; study; temperature; time; value; water; yield
- versions: original; plain text
- ap-548
- author: Telfer, D. J.; Spencer, J. W.; Jones, G. R.; Humphries, J. E.
- title: A Novel Approach to Power Circuit Breaker Design for Replacement of SF6
- date: 2004-01-02
- words: 2817
- flesch: 49
- summary: The noticeable features are: (a) Relatively small dependence upon gas pressure with SF6. It will also be extended to other appropriate polymeric materi- als, with suitable background gases and gas pressures, and electromagnetic arc driving forces in order to enhance the production of the suitable chemical species.
- keywords: ablation; acta; arc; background; breaker; chemical; circuit; co2; conditions; contact; critical; current; cycle; design; experimental; extinction; fig; gap; gases; half; high; house; http://ctn.cvut.cz/ap/; ignition; interruption; length; peak; performance; polytechnica; pressure; psi; ptfe; publishing; sf6; shield; similar; system; telfer; university; voltage
- versions: original; plain text
- ap-5482
- author: Pramanik, Santiranjan; Thipse, Sukrut Shrikant
- title: KINEMATIC SYNTHESIS OF CENTRAL-LEVER STEERING MECHANISM FOR FOUR WHEEL VEHICLES
- date: 2020-07-01
- words: 3066
- flesch: 70
- summary: Introduction There are several types of steering mechanisms used for four-wheel vehicles. Optimal synthesis of steering mechanism including transmission angles.
- keywords: ackermann; angle; bar; bar mechanism; central; centre; compound; crossed; design; equal; error; figure; gears; kinematic; length; lever; mechanical; mechanism; method; offset; optimization; outer; pressure; ratio; steering; steering error; steering mechanism; synthesis; track; vehicle; wheel
- versions: original; plain text
- ap-5489
- author: Úradníček, Juraj; Musil, Miloš; Bachratý, Michal
- title: EIGENVALUES EVALUATION OF GENERALLY DAMPED ELASTIC DISC BRAKE MODEL LOADED WITH NON-CONSERVATIVE FRICTION FORCE
- date: 2020-03-02
- words: 3125
- flesch: 56
- summary: Re- liability, braking power and a fluent operation are important properties of brake systems. Thus, an unstable behaviour of mechanical systems can also be caused by a dissipation induced instability, which was, in the case of brake system, pointed out in the work of Hoffman and Gaul in 2003 [3].
- keywords: acta; amplitude; behaviour; bifurcation; brake; case; coefficient; complex; conservative; damped; damping; disc; effects; eigenvalues; elastic; evaluation; experimental; figure; force; friction; mass; material; mechanical; modal; mode; non; physical; point; polytechnica; proportional; real; response; simple; slovak; sound; squeal; stability; state; system; time; unstable; vibration
- versions: original; plain text
- ap-550
- author: Murín, J.; Kropáč, M.; Fric, R.
- title: Numerical Analysis of the Temperature Field in Luminaires
- date: 2004-01-02
- words: 2485
- flesch: 49
- summary: Keywords: thermal analysis, luminaire, choke coil, heat loss, surface temperature, finite element method. Surface emissivity 0.7�0.9 Bulk temperature 19 °C Coef. of convection 7.5�9.5 Table 3: Expected parameters of convection and radiation of the heat Fig. 8: Temperature field on the surface of the choke coil (� � 8.5 W/m2K; � � 0.8)
- keywords: acta; analysis; calculation; choke; choke coil; circuit; coil; conditions; convection; current; emissivity; engineering; field; fig; heat; house; http://ctn.cvut.cz/ap/; light; loss; luminaire; measured; measurement; numerical; polytechnica; radiation; resistance; results; source; surface; temperature; thermal; university; values; vol; winding
- versions: original; plain text
- ap-5513
- author: Halder, Amlan Kanti; Paliathanasis, Andronikos; Leach, Peter Gavin Lawrence
- title: SIMILARITY SOLUTIONS AND CONSERVATION LAWS FOR THE BEAM EQUATIONS: A COMPLETE STUDY
- date: 2020-04-30
- words: 6030
- flesch: 75
- summary: We study the similarity solutions and we determine the conservation laws of various forms of beam equations, such as Euler-Bernoulli, Rayleigh and Timoshenko-Prescott. Keywords: Symmetry analysis, singularity analysis, conservation laws, beam equation.
- keywords: acta; algebra; analysis; beam; beam equations; bernoulli; bernoulli equation; conservation; differential; equation; euler; following; form; fourth; journal; laws; leach; lie; lie point; mathematical; new; nonlinear; ode; order; painlevé; paliathanasis; physics; point; point symmetries; polytechnica; prescott; rayleigh; reduced; reduction; respect; scaling; section; series; similarity; singularity; solutions; source; study; symmetries; symmetry; term; timoshenko; travelling; utt; wave; x−x0)4; αβuxxxx; φ(t
- versions: original; plain text
- ap-552
- author: Nikolovski, S.; Barić, T.
- title: Computer Aided Design of Transformer Station Grounding System Using CDEGS Software
- date: 2004-01-02
- words: 2724
- flesch: 52
- summary: Maxwell’s equations can be used to describe electric field E and magnetic field H in terms of scalar � and vector potential A: � � � � � � � 1 A (1) E A� � � �j� � (2) H � � � 1 � x A (3) � � � �� � j (4) where: � complex conductivity of the medium, � permeability of the medium, � conductivity of the medium, � permittivity of the medium. The first step in the design of transformer station grounding is to determine appropriate soil model, for predicting the effect of the underlying soil characteristics on the performance of the grounding system.
- keywords: acta; additional; apparent; cdegs; computer; current; czech; data; design; electrode; fault; fence; fig; grid; grounding; house; http://ctn.cvut.cz/ap/; layer; measured; measurement; model; polytechnica; potential; power; publishing; reach; resap; resistance; resistivity; safety; scalar; soil; station; step; study; surface; system; technical; touch; transformer; university; voltages; worst
- versions: original; plain text
- ap-5532
- author: Bošanský, Michal; Patzák, Bořek
- title: PARALLELIZATION OF ASSEMBLY OPERATION IN FINITE ELEMENT METHOD
- date: 2020-03-02
- words: 7332
- flesch: 57
- summary: Matrix assembly total times with dividing to evaluation of local matrix assembly times and localization into global matrix assembly times of the benchmark problem considered (Jete 3M). The performance of individual strategies of the vector assembly (in terms of the achieved speedup versus increasing the number of processors) for Jete250k test are presented in Fig- ure 4 and for matrix assembly in Figure 8.
- keywords: algorithm; assembly; assembly omp; benchmark; c++11; cache; case; code; colouring; computing; critical; data; different; element; figure; finite; global; individual; intel; jete3; lock; loop; m omp; matrix; matrix assembly; memory; method; multiple; mutex; number; omp; omp b105; omp b500; omp cp; omp cs(a1; omp dyn; omp lato(a3; omp ll(a1.2; omp nl(a2.1; omp sta; openmp; operation; parallel; parallelization; performance; posix; problem; processing; programming; prototype; pth; recursive; results; scalability; section; shared; sharing; simple; single; size(loce; speedups; strategies; synchronization; systems; threads; time; units; update; vector; vector assembly; ws omp; xeon
- versions: original; plain text
- ap-5534
- author: Kuznetsov, Alexandr; Oleshko, Oleg; Kuznetsova, Kateryna
- title: ENERGY GAIN FROM ERROR-CORRECTING CODING IN CHANNELS WITH GROUPING ERRORS
- date: 2020-03-02
- words: 4715
- flesch: 62
- summary: Let us fix the average error burst length lav and error probability per bit P0. It allows to describe the error behaviour in the communication channel and to develop practical recommendations on using error correcting codes.
- keywords: average; bch; bennet; binary; block; burst; channels; code; coding; continuous; correcting; data; decoding; dependencies; distribution; egc; energy; erroneous; error; error probability; expression; figure; froelich; gain; grouping; independent; lav; length; model; n−ξ; occurrence; package; ped; pn(l; probability; ratio; simplified; solid; symbols; transmission; ξ(1; ≤t(l
- versions: original; plain text
- ap-5536
- author: Kolaříková, Marie; Chotěborský, Rostislav; Hromasová, Monika; Linda, Miloslav
- title: THE CHARACTERISTICS OF Al-Si COATING ON STEEL 22MnB5 DEPENDING ON THE HEAT TREATMENT
- date: 2019-08-31
- words: 3458
- flesch: 65
- summary: [13] studied the phase formation at the soft steel interface and AlSi coating (with a silicon concentration of 5 and 10 %) at temperatures of 650-700 °C. [5] concluded that the iron diffusion from steel to AlSi coating prevails during the first two minutes of the heating (around 900 °C).
- keywords: 22mnb5; acta; al5fe2; alsi; analysis; chemical; coating; czech; diffusion; doi:10.1016; engineering; et al; feal; figure; formation; hardness; heat; hot; interface; intermetallic; journal; layer; left; materials; mechanical; min; minutes; modulus; parameters; phase; polytechnica; prague; process; properties; results; sample; steel; surface; t =; technology; temperature; time; treatment; weldability
- versions: original; plain text
- ap-554
- author: Bányai, T.
- title: Recycling and Networking
- date: 2004-01-02
- words: 4844
- flesch: 42
- summary: 44 No. 2/2004 Fig. 1: Structure of collection systems have to be considered. 5 Conception of the design of collection systems When an optimal logistic collection system is being formed, the internal and external logistic aspects need to be considered.
- keywords: acta; analysis; aspects; bányai; case; centres; closed; collected; collection; collection system; communal; companies; costs; czech; der; directives; disassembly; distribution; economic; economy; end; environmental; european; fig; formation; function; high; house; http://ctn.cvut.cz/ap/; hungary; important; large; level; logistic; loop; management; market; miskolc; number; operating; operation; order; planning; plants; polytechnica; process; products; publishing; quantity; recycling; services; single; small; system; tasks; technical; und; university; users; virtual; vol; waste
- versions: original; plain text
- ap-5541
- author: Al-Awad, Nasir Ahmad
- title: MODEL REFERENCE ADAPTIVE CONTROL-BASED GENETIC ALGORITHM DESIGN FOR HEADING SHIP MOTION
- date: 2020-07-01
- words: 4907
- flesch: 63
- summary: [4] have proposed two basic linear math- ematical models in light of the model of Davidson and Schiff, Nomoto’s models have been utilized broadly by control engineers for an investigation and outline of ship controllers. The historical backdrop of ship autopilots is over 80 years of age.
- keywords: acta; adaptation; adaptive; algorithm; angle; approach; autopilot; closed; control; controller; course; design; different; elements; engineering; error; execution; figure; framework; function; fuzzy; g.a; gain; genetic; heading; international; journal; law; linear; loop; lqr; marine; mathematical; method; mit; model; motion; movement; mrac; nomoto; nonlinear; order; parameters; pid; polytechnica; reference; requirements; response; rudder; sec; second; settling; ship; speed; steady; steering; surge; sway; system; time; transfer; transient; yaw
- versions: original; plain text
- ap-5544
- author: Ikponmwosa, Efe Ewaen; Ehikhuenmen, Samuel Onosedeba; Irene, Karieren Kate
- title: COMPARATIVE STUDY AND EMPIRICAL MODELLING OF PULVERIZED COCONUT SHELL, PERIWINKLE SHELL AND PALM KERNEL SHELL AS A POZZOLANS IN CONCRETE
- date: 2019-12-31
- words: 7500
- flesch: 63
- summary: Hence, from the result, it was concluded that blended cement concrete with a 20 % replacement of cement with the PSA and BLA was considered op- timum for ternary blended cement concrete. Mathematical model The results of and the experimental data for various properties of pozzolan blended concrete were anal- ysed using a bilinear interpolation method to develop mathematical models for predicting parameters with respect to its variables.
- keywords: addition; age; aggregate; american; analysis; ash; astm; blended; british; chemical; coconut; coconut shell; comparative; compressive; compressive strength; concrete; construction; curing; days; density; effect; engineering; figure; ikponmwosa; increase; journal; kernel; kernel shell; level; materials; mix; mm2; model; palm; partial; paste; pcs; percentage; periwinkle; periwinkle shell; pozzolans; ppks; pps; production; properties; pulverized; replacement; replacement level; research; results; setting; shell; shell ash; society; specimens; standard; strength; structural; study; table; tensile; testing; time; values; water; workability
- versions: original; plain text
- ap-5549
- author: Hron, Vojtěch; Halounová, Lena
- title: AUTOMATIC RECONSTRUCTION OF ROOF MODELS FROM BUILDING OUTLINES AND AERIAL IMAGE DATA
- date: 2019-11-01
- words: 7317
- flesch: 57
- summary: Automatic extraction of building roofs using LIDAR data and multispectral imagery. Keywords: Building reconstruction, roof model, edge detection, orthophoto, digital surface model, GIS. 1.
- keywords: 3d building; acta; adjacent; aerial; algorithm; als; analysis; angle; approach; automatic; building; building models; building outline; categorization; clouds; complex; creation; czech; data; dense; detection; digital; distance; doi:10.1016; edges; endpoints; extraction; figure; footprints; generated; generation; half; halounová; height; hip roof; hips; image; information; isprs; journal; laser; length; lod2; lsd; main; matching; method; models; ndsm; oblique; orthophoto; outlines; parallel; photogrammetry; pixel; planes; point; polygon; polytechnica; quality; reconstructed; reconstruction; remote; resolution; results; ridge; roof; roof edges; roof models; segments; sensing; shape; sides; skeleton; spatial; study; surface; survey; technique; type; use; valleys; vertices
- versions: original; plain text
- ap-5556
- author: Salawu, Saheed; Sobamowo, Gbeminiyi; Sadiq, Obanishola
- title: INVESTIGATION OF THE DYNAMIC BEHAVIOUR OF NON-UNIFORM THICKNESS CIRCULAR PLATES RESTING ON WINKLER AND PASTERNAK FOUNDATIONS
- date: 2020-04-30
- words: 8372
- flesch: 68
- summary: Keywords: Free vibration, natural frequency, Winkler and Pasternak, circular plate, Galerkin method of weighted residual. [4] investigated the vibration analysis of circular plates under the influence of in-plane loading resting on the Winkler foundation.
- keywords: acta; analysis; analytical; application; behaviour; boundary; case; circular; circular plate; condition; d2w; deflection; density; differential; doi:10.1016; dr2; dr3; dynamic; edge; elastic; equation; figure; foundation; free; frequency; function; galerkin; governing; increases; influence; investigation; method; mode; natural; non; nonlinear; parameter; pasternak; plate; polytechnica; present; radial; residual; results; salawu; shape; sobamowo; solution; stress; study; surface; symmetric; thickness; uniform; variation; vibration; w(r; weighted; winkler; ∂2w(r
- versions: original; plain text
- ap-556
- author: Chudý, P.
- title: Response of a Light Aircraft Under Gust Loads
- date: 2004-01-02
- words: 2940
- flesch: 64
- summary: AP04_2web.vp Nomenclature � �Mhh Modal Mass Matrix � �K hh Modal Stiffness Matrix M Mach Number k Reduced Frequency c Reference Length � �Q m khh ( , ) Unsteady Aerodynamic Force Matrix � Circular Frequency f Frequency g Structural Damping, Acceleration due to gravity � Air density V Airplane Velocity � �uh Modal Amplitude Vector � �P( )� Applied Gust Loading A Root-mean-square value of the response N0 Expected number of zero crossings with positive slope per unit time For single Input/Output systems, the PSD function of the response quantity, �(�), is related to the PSD function of the source, �(�), by � � � �( ) ( ) ( )� H i 2 � (2) where H i( )� is the frequency response function.
- keywords: acta; aerodynamic; aircraft; analysis; approach; bending; boxes; conditions; continuous; czech; density; discrete; fig; flight; formula; frequency; glider; gust; history; house; http://ctn.cvut.cz/ap/; loads; model; moment; nastran; polytechnica; properties; psd; publishing; response; root; span; static; structural; table; technical; time; turbulence; university; velocity; vertical; vol; wing; wise
- versions: original; plain text
- ap-5565
- author: Agustina, Tuty Emilia; Teguh, Dedi; Wijaya, Yourdan; Mermaliandi, Febrian; Bustomi, Ahmad; Manalaoon, Jantan; Theodora, Gita; Rebecca, Tessa
- title: STUDY OF SYNTHETIC DYE REMOVAL USING FENTON/TiO2, FENTON/UV, AND FENTON/TiO2/UV METHODS AND THE APPLICATION TO JUMPUTAN FABRIC WASTEWATER
- date: 2019-12-31
- words: 6301
- flesch: 60
- summary: The results of Fenton process are considered ineffective, therefore, the use of Fenton reagents needs to be combined with other advanced oxidation methods, namely UV light, TiO2 catalyst, or photocatalyst of UV/TiO2. As the a results, the photo-Fenton process was supe- rior to Fenton process.
- keywords: advanced; agustina; aops; band; catalyst; chemical; cod; colour; colour degradation; concentration; degradation; doi:10.1016; dyes; effect; engineering; equation; fabric; fe2; fenton; fenton process; fenton reagent; figure; h2o2; high; highest; hydrogen; hydroxyl; industry; journal; jumputan; light; method; minutes; molar; organic; oxidation; percentage; peroxide; photo; photocatalytic; pollutants; ppm; presence; process; processes; processing; radicals; ratio; reaction; reactive; reagent; red; removal; results; study; synthetic; textile; time; tio2; treatment; use; wastewater; •oh
- versions: original; plain text
- ap-558
- author: Slavík, S.
- title: Preliminary Determination of Propeller Aerodynamic Characteristics for Small Aeroplanes
- date: 2004-01-02
- words: 4293
- flesch: 69
- summary: � � � � � ) cos( ) ,2 �i (5) and the angle of the real incoming flow �: � � � � � � � � � ��� � � � � � � �0 7 0 7 0 7 0 7 . . . . cos( ) sin( )� �� � (11) c
- keywords: advance; aerodynamic; angle; blade; calculation; characteristics; coefficients; cos; curves; czech; decomposition; drag; efficiency; experimental; factor; fig; flight; form; geometric; geometry; induced; input; integral; lift; linear; lock; loss; maximum; method; model; number; numerical; parameters; power; procedure; propeller; ratio; referential; relative; results; rmax; section; set; sin; technical; thrust; tip; university; � �
- versions: original; plain text
- ap-5588
- author: Čížek, Michal; Pátek, Zdeněk
- title: ON CFD INVESTIGATION OF RADIAL CLEARANCE OF LABYRINTH SEALS OF A TURBINE ENGINE
- date: 2020-03-02
- words: 3528
- flesch: 66
- summary: The aim is to describe numerical calculations of fluid flow in labyrinth seals and evaluate the calculated data for different settings of radial clearance of labyrinth seals. On CFD Investigation of radial clearance of labyrinth seals. . .
- keywords: acta; air; analysis; calculated; calculation; cfd; clearance; conditions; constant; different; engine; enthalpy; fig; figure; flow; investigation; labyrinth; labyrinth seals; mach; mass; mesh; model; non; number; parameters; parts; polytechnica; pressure; radial; rccorr; results; rotating; rotor; seals; shaft; static; stator; teeth; temperature; total; turbine; velocity; volume
- versions: original; plain text
- ap-5592
- author: Gabrišová, Ľudmila; Peciar, Peter; Macho, Oliver; Juriga, Martin; Galbavá, Paulína; Nižnanská, Žofia; Kubinec, Róbert; Valent, Ivan; Peciar, Marián
- title: THE DEVELOPMENT OF A NEW ADSORPTION-DESORPTION DEVICE
- date: 2020-12-31
- words: 4686
- flesch: 55
- summary: Partial pressures of ethanol [Pa] pW Partial pressures of water [Pa] VC Volume of the product (condensate) after adsorp- tion–desorption process [ml] VM M Volume of the model mixture in stock vessel before adsorption [ml] ∆VM M Volume of the model mixture in stock vessel after adsorption [ml] Acknowledgements As an adsorbent, it is possible to use granulated activated carbon (GAC) in the adsorption and desorption process.
- keywords: adsorbed; adsorbent; adsorption; air; analysis; bratislava; carbon; chemical; chemistry; circulator; compounds; concentration; condensate; content; data; determination; development; device; distilled; distribution; doi:10.1016; engineering; ethanol; experiment; fermentation; fig; figure; flow; gac1; gac2; gacs; gas; heat; journal; liquid; mixture; model; new; organic; particle; process; processes; production; saturation; separation; size; stock; stripping; study; surface; table; technology; temperature; thermocouples; values; vapour; vessel; volatile; volume; water
- versions: original; plain text
- ap-5599
- author: Vashi, Yoginibahen Devendrasinh; Patel, Rakesh Manilal; Deheri, Gunamani Biswanath
- title: NEURINGER-ROSEINWEIG MODEL BASED LONGITUDINALLY ROUGH POROUS CIRCULAR STEPPED PLATES IN THE EXISTENCE OF COUPLE STRESS
- date: 2020-07-01
- words: 5104
- flesch: 69
- summary: Furthermore, this improvement in load bearing capacity is almost 58 % higher when 264 vol. [11] theory and this study discovered the advantages of couple stress fluid compared to Newtonian lubricants, such as improved 259 https://doi.org/10.14311/AP.2020.60.0259 https://ojs.cvut.cz/ojs/index.php/ap Y. D. Vashi, R. M. Patel, G. B. Deheri Acta Polytechnica bearing’s load capacity, reduced coefficient of friction and growth in squeeze film time.
- keywords: 0.001; acta; bearing; capacity; circular; combined; couple; deheri; dimensionless; effect; equation; ferrofluid; figure; film; fluid; impact; influence; journal; load; longitudinal; lubricant; lubrication; magnetic; model; neuringer; parameter; patel; plates; polytechnica; porous; pressure; roughness; s*=; slider; squeeze; step; stress; study; surface; trends; values; ψ =; −0.025
- versions: original; plain text
- ap-560
- author: Ulrych, J.
- title: Analysis of Unsteady Transonic Flow Fields by Means of the Colour Streak Schlieren Method
- date: 2004-01-03
- words: 2914
- flesch: 60
- summary: For the CSSM analysis M � � 0.9, � � 4 deg, � � � � 3 deg, f � 1, 15, 30 Hz, and t � 2.2 mm. The picture corresponds to M � � 0.9, � � 4 deg, � � � � 3 deg, f � 1 Hz, y � 17 mm, t � 2.2 mm.
- keywords: airfoil; analysis; angle; attack; centre; colour; cssm; czech; dead; deg; field; fig; flow; frequency; method; model; optical; oscillation; position; schlieren; shock; streak; terminal; test; transonic; unsteady; video; wave
- versions: original; plain text
- ap-562
- author: Catalano, F. M.
- title: On the Effects of an Installed Propeller Slipstream on Wing Aerodynamic Characteristics
- date: 2004-01-03
- words: 3536
- flesch: 61
- summary: Recent work [5, 6] and also demonstrated that laminar flow could be increased when pusher propellers are installed in convenient positions behind a wing, resulting in less friction drag. This phenomenon is especially © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 11 Acta Polytechnica Vol. 44 No. 3/2004 Fig. 8: Effect of the pusher propeller on separation, � � 14° Fig. 9: Transition and separation points at centre line for pusher model at position 01 Fig. 10: Transition and separation points at the centre line for pusher model, position 03 intense for propeller positions above the chord line, but even so it is much less intense than the backward movement of the turbulent separation front due to the propeller inflow.
- keywords: aircraft; angles; bladed; boundary; case; characteristics; configuration; drag; effect; fig; flow; high; incidence; increase; laminar; layer; measurements; model; pos; position; pressure; propeller; pusher; separation; set; slipstream; spanwise; speed; surface; tests; tractor; transition; tunnel; turbulent; university; visualisation; vol; wind; wing; wire; working
- versions: original; plain text
- ap-564
- author: Heger, J.
- title: Finite Element Modelling of Mechanical Phenomena Connected to the Technological Process of Continuous Casting of Steel
- date: 2004-01-03
- words: 3158
- flesch: 46
- summary: 18 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 44 No. 3/2004 Fig. 3: Stress-strain curves © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 19 Acta Polytechnica Vol. 44 No. 3/2004 Fig. 4: Stress distribution along the product outer surface Fig. 5: Residual stress distribution 2.7 Residual stresses The endless product of continuous casting is torch cut-off into slabs of the prescribed length and their successive grad- ual cooling in the environment of the production hall follows. Keywords: Continuous casting, steel slab, numerical simulation, finite element method, nonlinearity, large deformations, contact, crack initiation.
- keywords: algorithm; analysis; caster; casting process; conditions; contact; continuous casting; cooling; crack; distribution; element; fig; finite; forming; material; mechanical; method; mould; numerical; numerical simulation; phenomena; problem; process; product; program; results; rollers; sensitivity; simulation; slab; steel; strain; stress; stresses; surface; temperature; thermal; time
- versions: original; plain text
- ap-566
- author: Mareš, T.
- title: Controlling Laminate Plate Elastic Behavior
- date: 2004-01-03
- words: 1867
- flesch: 64
- summary: s1 3 2 2 1 � � � � � � � � 2 , � ��� ��� � �� �� � � � � � � � 1 4 3 5 4 1 2 N P c s P s w q ( , , ) ,� �w w R R R K �� � ��� ��� ��� � � � 1 2 3 1 � � � �� tg tg2 ,, � 1 4 5 0 1 2 K R R N � � � ��� ��� �tg tg 3 4 ( , , , )� In this P ��� , R ��� , � are known numbers, c � cos( ), s � sin( ) and are the searched ply orientations.
- keywords: example; laminate; lateral; loading; measure; middle; optimization; orientation; plate; plies; problem; respect; stiffness
- versions: original; plain text
- ap-568
- author: Bauma, V.; Valášek, M.; Šika, Z.
- title: Design and Properties of Octaslide Redundant Parallel Kinematics
- date: 2004-01-03
- words: 1868
- flesch: 59
- summary: AP04_3web.vp 1 Introduction This paper describes the conceptual design process of OCTASLIDE redundant parallel kinematics for a machine tool. 24 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 44 No. 3/2004 Design and Properties of Octaslide Redundant Parallel Kinematics V. Bauma, M. Valášek, Z. Šika This paper describes the conceptual design process of OCTASLIDE redundant parallel kinematics for a machine tool.
- keywords: -0.5; concept; czech; design; dexterity; fig; hexaslide; kinematics; links; machine; octaslide; parallel; redundant; structure; university
- versions: original; plain text
- ap-5680
- author: Mihalev, Mihail Stoyanov; Hardalov, Chavdar Momchilov; Christov, Christo Georgiev; Rinke, Monika ; Leiste, Harald ; Schneider, Johannes
- title: ADDITIVE LASER BARCODE PRINTING ON HIGH REFLECTIVE STAINLESS STEEL
- date: 2020-11-02
- words: 2682
- flesch: 58
- summary: The resulting additive coatings, produced from initial MoO3 powder by irradiation with a laser beam, reveal strong adhesion, high hardness, long durability and high optical contrast, which make the process suitable for barcode printing on materials such as high reflective stainless steel, which was always a challenge for the classical laser marking technologies. Spectral Reflectance Profile of stainless steel substrate and MoO3 layer, obtained by the ALM.
- keywords: acta; additive; alm; applied; bar; barcode; bars; black; coating; compliance; contrast; edge; experimental; fig; high; institute; laser; marking; materials; metal; minimal; moo3; printing; profile; properties; reflectance; reflective; scan; space; stainless; standard; steel; substrate; symbol; table; threshold; width
- versions: original; plain text
- ap-5687
- author: Silva, Willian T. F. D.; Borges, Filipe D. D. M.
- title: Genetic algorithms to determine the optimal parameters of an ensemble local mean decomposition
- date: 2021-06-30
- words: 6945
- flesch: 58
- summary: An ensemble local means decomposition method and its application to local rub-impact fault diagnosis of the rotor systems. Complementary ensemble local means decomposition method and its application to rolling element bearings fault diagnosis.
- keywords: acta; algorithms; amplitude; analysis; application; authors; bearing; better; components; cost; d e; data; decomposition; diagnosis; domain; effectiveness; ensemble; ensemble local; envelope; fault; figure; following; frequency; function; genetic; journal; li tu; local; local mean; m p; mean; mean decomposition; method; mixing; mode; new; noise; number; oelmd; optimal; optimization; order; p li; parameters; polytechnica; population; pre; processing; product; race; random; results; rrmse; section; signal; similar; spectrum; table; technique; test; time; tu d; values; vibration; white; work; x(t
- versions: original; plain text
- ap-570
- author: Maléř, Z.; Slavík, S.; Marczi, T.; Růžička, M.
- title: Common Mathematical Model of Fatigue Characteristics
- date: 2004-01-03
- words: 2623
- flesch: 67
- summary: � � �2 This model was verified by five sets of fatigue data taken from the literature and by our own three additional original fatigue sets. Studying this model, following knowledge was obtained: – the parameter ”stress ratio R” was a good physical characteristic – the proposed model provided a good description of the eight collections of fatigue test results by one equation only – the scatter of the results through the whole scope is only a little greater than that round the individual S/N curve – using this model while testing may reduce the number of test samples and shorten the test time – as the proposed model represents a common form of the S/N curve, it may be used for processing uniform objective fatigue life results, which may enable mutual comparison of fatigue characteristics.
- keywords: characteristics; curves; cycle; czech; equation; fatigue; fig; function; life; log; mathematical; model; new; number; original; paper; parameters; range; results; stress; system; technical; test; university; value
- versions: original; plain text
- ap-5709
- author: Beneš, Michal; Štefan, Radek
- title: HOMOGENIZATION OF TRANSPORT PROCESSES AND HYDRATION PHENOMENA IN FRESH CONCRETE
- date: 2020-03-02
- words: 7150
- flesch: 64
- summary: Periodic cell problem The problems (10) and (11) need to be solved in each discrete time step. This means that a very large number of cell problems need to be solved in order to compute homogenized coefficients A∗ and Λ∗ in the whole macroscopic domain Ω.
- keywords: acta; aggregates; analysed; analytical; approach; approximation; beneš; boundary; cell; cement; coarse; coefficients; composite; concrete; conditions; conductivity; degree; different; doi:10.1016; early; element; equations; example; experiments; figure; finite; framework; function; heat; homogenization; homogenized; hydration; initial; kg−1; k−1; liquid; mass; material; mesh; mesoscale; method; model; n+1; numerical; paper; parameters; paste; periodic; permeability; phenomena; polytechnica; porous; pressure; problem; processes; results; section; solution; step; structure; sviercoski; temperature; thermal; time; transport; variant; water; δ∆t
- versions: original; plain text
- ap-5715
- author: Daniyan, Ilesanmi; Tlhabadira, Isaac; Mpofu, Khumbulani; Adeodu, Adefemi
- title: DEVELOPMENT OF NUMERICAL MODELS FOR THE PREDICTION OF TEMPERATURE AND SURFACE ROUGHNESS DURING THE MACHINING OPERATION OF TITANIUM ALLOY (Ti6Al4V)
- date: 2020-11-02
- words: 9813
- flesch: 58
- summary: The feasible combinations of these process parameters produced 41 experimental trials whose response (surface roughness and temperature) were determined via the physical experimentations. Results from the response surface methodology The statistical analysis of the developed model for predicting surface roughness as a fucntion of the inde- pendent process parameters (feed rate, spindle speed, cutting velocity and depth of cut) as well as its Anal- ysis of Variance (ANOVA) are presented in Tables 4 and 5 respectively.
- keywords: acta; alloy; analysis; ann; artificial; average; correlation; cutting; cutting tool; daniyan; data; depth; design; developed; development; doi:10.1016; effect; equation; error; experimentations; feed; figure; fit; function; increase; international; journal; lack; linear; machining; magnitude; manufacturing; material; mechanical; methodology; milling; model; modelling; mpofu; network; neural; number; numerical; operation; optimization; output; parameters; performance; physical; piece; plot; polytechnica; predictive; process; process parameters; purposes; range; rate; response; response surface; results; rsm; set; significant; speed; spindle; spindle speed; statistical; surface; surface methodology; surface roughness; table; technology; temperature; term; ti6al4v; titanium; tlhabadira; tool; training; validation; value; velocity; work piece
- versions: original; plain text
- ap-572
- author: Leinonen, J. I.
- title: Superior Properties of Ultra-fine-grained Steels
- date: 2004-01-03
- words: 2491
- flesch: 66
- summary: During this cooling and transformation, the prolonged austenite grains change to ultra-fine grains of ferrite, pearlite, etc., depending on the steel composition and cooling rate. The effect of ferrite grain size on yield strength and impact transition temperature (tough/brittle), extrapolated to ultra-fine grain sizes, is shown in Fig.
- keywords: charpy; fatigue; ferrite; fig; fine; good; grain; high; hot; impact; japan; low; microstructure; novel; process; properties; rolling; size; steels; strength; structure; superior; temperature; test; tncp; toughness; ultra; ultrafine; vol; yield
- versions: original; plain text
- ap-574
- author: Polášek, M.; Macek, J.; Vítek, O.; Kozel, K.
- title: Integration of CFD Methods into Concurrent Design of Internal Combustion Engine
- date: 2004-01-03
- words: 4259
- flesch: 55
- summary: Using these tools, real limits for high-b.m.e.p., downsized SI engines and optimized cycle parameters can be estimated in advance, taking into account the auto-ignition and knock limits. Knocking considerably limits the parameters of SI engines.
- keywords: 3/2004; acta; advanced; application; bar; boost; cfd; code; combustion; compression; concept; cycle; cylinder; czech; deep; description; design; different; dimensional; efficiency; engine; fig; fuel; gas; heat; high; house; http://ctn.cvut.cz/ap/; ignition; knock; level; macek; medium; methods; mixture; model; modeling; new; paper; polytechnica; polášek; pressure; procedure; publishing; results; sae; simulation; space; stage; system; technical; temperature; thermodynamic; time; transfer; university; use; vol
- versions: original; plain text
- ap-576
- author: Matsuki, N.; Tokunaga, H.; Sawada, H.
- title: A Component-based Software Development and Execution Framework for CAx Applications
- date: 2004-01-03
- words: 3089
- flesch: 50
- summary: The MZ-Platform infrastructure is a component-based software development framework, designed for supporting enterprises to enhance digitalized technologies using software tools and CAx components in a self-innovative way. The XML-Component Transmutation module can store component assembly in XML format.
- keywords: application; architecture; assembly; broker; builder; bus; cad; cax; checker; component; data; design; development; enterprises; event; example; fig; file; framework; geometry; information; java; library; manufacturing; medium; modeling; new; object; parametric; platform; remote; screen; size; small; soap; software; tools; transmutation; users; xml
- versions: original; plain text
- ap-578
- author: Horák, M.
- title: Nanoelectronic Device Structures at Terahertz Frequency
- date: 2004-01-03
- words: 5328
- flesch: 63
- summary: A f x B g x A f x B g x C f x x � � � � � � � � � � � � � � ( ), ( ), ( ), ( ), ( ), 0 0 0 0 B D g x x C E U0 2� �( )max � triangular f x Ai( ) ( )� � , g x Bi( ) ( )� � Airy functions � �� � � � � � � � � � � �x x E UB 1 max , � � � � � � � � 2 2 1 3 mU x max � B trapezoidal f x Ai( ) ( )� � , g x Bi( ) ( )� � Airy functions � � � �( )x � �� � � 2 2 1 3 m U x ( )max �B B� , � � � � x e UB B B � �max parabolic f x U u( ) ( , )� � � , g x V u( ) ( , )� � � parabolic cylinder functions � �� �( )x xB � � � � � 8 2 2 1 4 mU x max � B , u E x m U � � � � B � 2 1 2 max Table 1: Electron wave functions in the barrier region j e im x x j e im inc trans � � � � � � � � 2 2 � � � � � A A A A C * * , * * . � � � C C C x x � � � � (5) The steady state barrier transmittance T Edc( ) is a function of electron energy E and it is defined as the ratio j jtrans inc .
- keywords: absorption; amplitude; b b; barrier; bias; cos; current; czech; electron; emission; energy; exp; fig; frequency; function; harmonics; height; high; incident; max �; modulation; n �; parabolic; potential; quanta �; quantum; rectangular; region; signal; sin; small; structure; t e; t t; t �; terahertz; thz; transmission; transmittance; u �; university; vol; voltage; wave; � b
- versions: original; plain text
- ap-5781
- author: Sabatini, Michel; Havlík, Jan; Dlouhý, Tomáš
- title: Improving the efficiency of a steam power plant cycle by integrating a rotary indirect dryer
- date: 2021-06-30
- words: 4746
- flesch: 62
- summary: To obtain dried fuel, more water, in dependence on the moisture content before and after drying, has to be evaporated. Keywords: Indirect drying, biomass drying, power generation efficiency.
- keywords: area; biomass; boiler; combustion; consumption; content; cycle; dryer; drying; efficiency; energy; evaporation; extraction; figure; flow; flue; fuel; gas; generation; generation efficiency; heat; heated; heating; high; increase; indirect; indirect dryer; integrated; integration; low; material; moisture; moisture content; parameters; plant; plant cycle; power; power generation; power plant; pressure; process; required; results; rotary; steam; steam power; surface; temperature; turbine; value; water; wet
- versions: original; plain text
- ap-580
- author: Geromiller, H.-P.; Farschtschi, A.
- title: Numerical Calculation of Electric Fields in Housing Spaces due to Electromagnetic Radiation from Antennas for Mobile Communication
- date: 2004-01-03
- words: 1474
- flesch: 52
- summary: 2: Dependency of maximum electric field strength inside a housing space referred to the incident electric field strength (E Eincmax ) over angle of incidence (�) related to the energetic density of electromagnetic waves, and therefore the negative impacts on humans increases dispro- portionately with electric field strength. Investiga- tion of electric field strength inside the house-spacing was based on different angles of incidence within the range of 5 ° � � � 85° in steps of �step � 5°.
- keywords: electric; electromagnetic; field; house; housing; incident; plane; radiation; space; strength; time; wave; y z
- versions: original; plain text
- ap-5809
- author: Vokurka, Karel
- title: ON THE SECOND LIGHT FLASH EMITTED FROM A SPARK-GENERATED BUBBLE OSCILLATING IN WATER
- date: 2020-07-01
- words: 7224
- flesch: 69
- summary: Generated bubbles can be described by two parameters. 20 25 30 35 40 45 50 55 60 0 2 4 6 8 10 12 14 16 18 20 R M1 [ mm ] d 1 2 [ µs ] Figure 4. Variation of the time distance between the first and second optical pulses d12 with bubble size RM 1. 272 vol.
- keywords: acoustic; acta; bubble; bubble size; cavitation; correlation; d12; data; difference; discharge; distance; emission; example; experiments; figure; flashes; following; intensity; journal; laser; light; light pulses; maximum; observed; optical; optical pulse; oscillation; p1(t; parameters; physical; physics; place; plasma; polytechnica; present; pressure; process; processes; pulse; pzp1; record; responsible; review; second; second light; single; size; small; spark; time; tp1; tu1; u2(t; value; variation; vokurka; water; waves; width; work
- versions: original; plain text
- ap-582
- author: Green, G.; Mamtani, G.
- title: An Integrated Decision Making Model for Evaluation of Concept Design
- date: 2004-01-03
- words: 2540
- flesch: 64
- summary: 62 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 44 No. 3/2004 An Integrated Decision Making Model for Evaluation of Concept Design G. Green, G. Mamtani The Conceptual design phase generates various design concepts and these are then evaluated in order to identify the ‘Best’ concept. One of them includes application of Fuzzy Logic as a tool to evaluate design concepts against criteria.
- keywords: application; best; concepts; crisp; criteria; decision; design; evaluation; fig; final; fuzzy; generation; good; high; integrated; linguistic; logic; matrix; mileage; model; phase; process; product; rules; sets; values
- versions: original; plain text
- ap-5826
- author: Urban, Jan; Rychtáriková, Renata; Macháček, Petr; Štys, Dalibor; Urbanová, Pavla; Císař, Petr
- title: OPTIMIZATION OF COMPUTATIONAL BURDEN OF THE POINT INFORMATION GAIN
- date: 2019-12-31
- words: 5382
- flesch: 73
- summary: = H − H (i) (7) refers then to a difference between the entropy of the two histograms and thus also to the difference be- tween the entropy of two images – with and without the investigated pixel Φ(x,y) of the intensity i. Recall that the histograms P and P(i) were normalized and, therefore, the difference Γ(i) is usually a small number. = H − H (i), Γ(i) = ln(WH)
- keywords: 2d−1∑; = =; = −; acta; algorithm; background; calculation; column; computation; contribution; cross; difference; entropy; function; gain; gpu; h(x; histogram; image; information; intensity; investigated; ln(nj; ln(nj(x; ln(wh; n(y; ni(y; optimization; p(i; pig; pixel; point; polytechnica; position; probability; processing; row; rychtáriková; shannon; software; total; urban; value; vol; γ(i; γ(i)(x; φ(x; ∑i−1; −ej
- versions: original; plain text
- ap-584
- author: Chudý, P.; Fiľakovský, K.; Friedl, J.
- title: Aerodynamic Analysis of Turboprop Engine Air Intake
- date: 2004-01-03
- words: 2226
- flesch: 59
- summary: Five geometric varia- tions were computed, as follows: � Original air intake, � Air intake +10 %, � Air intake � 10%, � Air intake with prismatic insert, � Optimised air intake. The main purpose is to estimate the air intake fluid characteristics of different air intake geometries.
- keywords: air; air intake; case; certain; cfd; chamber; channel; czech; domain; engine; external; fig; flow; geometric; geometry; insert; intake; internal; loss; mesh; model; nacelle; original; pressure; prismatic; results; sections; separation; set; streamlines; total; turboprop; turbulence; university; value; vol
- versions: original; plain text
- ap-586
- author: Jurun, E.; Veza, I.
- title: Developing Model for Supply Chain Management - the Case of Croatia
- date: 2004-01-03
- words: 3683
- flesch: 52
- summary: i ij, � � �1 , 1 � �j m i( ) (11) where: pij is the unit price for level j, bij are the quantities at which price breaks occur, m(i) is the number of quantity ranges in vendor is price schedule. (12) Since xij can be nonzero only if b x bi j ij ij, � � �1 , (13) it follows that the objective function becomes p x p
- keywords: acta; breaks; buyer; chain; chain management; concept; constraint; costs; croatia; customer; delivery; distribution; enterprises; entire; goods; house; http://ctn.cvut.cz/ap/; information; level; main; management; markets; mathematical; model; network; new; number; objective; order; paper; planned; planning; polytechnica; price; process; production; publishing; purchasing; quality; quantity; reference; requirements; scm; scor; selection; strategic; supplier; supply; supply chain; time; total; university; vol
- versions: original; plain text
- ap-588
- author: Farouk, A.; Lamboj, L.; Kos, J.
- title: A Numerical Model to Predict Matric Suction Inside Unsaturated Soils
- date: 2004-01-04
- words: 4572
- flesch: 57
- summary: Matric suction in such a system arises from capillary actions attributed to interactions between air-water menisci (which are generated from the surface tension phenomenon), and soil particles. In fact, when the contractile skin spans between col- lections of soil particles, dependent on the geometry, it is necessary for continuity that the interface has curvature both concave and convex to the air phase [8].
- keywords: air; angle; capillary; case; characteristic; contact; content; contractile; curve; distribution; effect; equal; fig; fredlund; grain; matric; matric suction; menisci; meniscus; model; numerical; packing; particles; points; pore; pressure; simple; simulation; size; skin; soil; spheres; spherical; suction; surface; swcc; tension; unsaturated; vol; volume; water; water content
- versions: original; plain text
- ap-5897
- author: Caalim, Jonathan; Demegillo, Shiela
- title: BETA CANTOR SERIES EXPANSION AND ADMISSIBLE SEQUENCES
- date: 2020-07-01
- words: 7598
- flesch: 92
- summary: − γ /∈ Z for all n ∈ N (e.g. β may be taken to be transcendental over Q and γ ∈ Q). In particular, we show that for a fix γ ∈ R and a sequence B of real number bases, every element of the interval [γ,γ + 1) has a beta Cantor series expansion with respect to B where the digits are integers in some alphabet A(B).
- keywords: a(b; a1,a2; acta; admissibility; admissible; b[i; b[k; b[m; b[n; base; beta; c1,c2; cantor; case; ck+1; corollary; d(b; d1,d2; d∗(α; expansion; following; i=1; integer; lemma; lexicographic; map; negative; note; n∪{0; positive; proof; proposition; real; restriction; satisfies; section; sequence; series; transformation; − �; −γc
- versions: original; plain text
- ap-590
- author: Farouk, A.; Lamboj, L.; Kos, J.
- title: Influence of Matric Suction on the Shear Strength Behaviour of Unsaturated Sand
- date: 2004-01-04
- words: 3653
- flesch: 58
- summary: For example, Fig. 3 shows that the shear strength of sample GUS1-50 is roughly 1.25 times that of saturated sample GS1, which indicates that an increase in soil suction leads to an increase in shear strength. The main goal of testing this group was to evaluate the effective shear strength parameters, c’ and �‘, and to have the ability to compare the behaviour of satu- rated samples with that of unsaturated samples.
- keywords: air; behaviour; conditions; confining; consolidation; constant; content; czech; fig; group; initial; kpa; matric; matric suction; net; pore; pressure; process; publishing; samples; sand; shear; shearing; soils; stage; strength; stress; suction; technical; tested; testing; tests; triaxial; university; unsaturated; vol; water
- versions: original; plain text
- ap-5918
- author: Haouam, Ilyas
- title: ANALYTICAL SOLUTION OF (2+1) DIMENSIONAL DIRAC EQUATION IN TIME-DEPENDENT NONCOMMUTATIVE PHASE-SPACE
- date: 2020-04-30
- words: 5983
- flesch: 69
- summary: The above equation is the relation of the ordinary NCG except that the NC structure constants are considered as exponentially increasing functions with the evolution of time. Deriving Eq.(48) in time, we find ∂I ∂t |φ(λ,k)〉 + I ∂ ∂t |φ(λ,k)〉 = ∂λ ∂t |φ(λ,k)〉 + λ ∂ ∂t |φ(λ,k)〉 , (50) we apply Eq.(14) over the eigenfunctions |φ(λ,k)〉, we have i ∂I ∂t |φ(λ,k)〉 + IHnc |φ(λ,k)〉−Hncλ |φ(λ,k)〉 = 0, (51) the scalar product of Eq.(51) by 〈 φ(λ ′ ,k ′ ) ∣∣∣ is i 〈 φ(λ ′ ,k ′ ) ∣∣∣∣∂I∂t ∣∣∣∣φ(λ,k) 〉 + ( λ ′ −λ )〈 φ(λ ′ ,k ′ ) |Hnc|φ(λ,k) 〉 = 0, (52) which implies 〈 φ(λ ′ ,k ′ ) ∣∣∣∣∂I∂t ∣∣∣∣φ(λ,k) 〉 = 0, (53) the scalar product of Eq.(50) by 〈 φ(λ ′ ,k ′ )
- keywords: acta; analytical; bopp; dependent; dimensional; dirac; dirac equation; doi:10.1103; effect; eigenstates; electric; equation; field; functions; geometry; graphene; haouam; harmonic; hnc; i(t; ilyas; invariant; journal; landau; letters; levels; lewis; linear; magnetic; mathematical; matrices; matrix; mechanics; method; momentum; nc k; ncg; noncommutative; operators; parameters; phase; physical; physical review; physics; polytechnica; potential; product; quantum; real; relations; review; riesenfeld; shift; solution; space; spin; system; theory; time; wave; xncj; |φ(λ; ∂ξ2; −f1; −f2; ∣∣ψ̄; ∣∣∣
- versions: original; plain text
- ap-592
- author: Ficker, T.
- title: Multifractal Image Analysis of Electrostatic Surface Microdischarges
- date: 2004-01-04
- words: 2672
- flesch: 68
- summary: pq i q i I ( , ) ( )� �� � � 1 , p n N i i( )� � � � � � � , pi i I ( )� � � � 1 1 , q �� �( , ) . Many followers appeared in the field of computer simula- tions of discharge channel structures
- keywords: analysis; appl; arrangement; channel; czech; dielectric; dimension; discharges; electret; electrode; electrostatic; fig; figures; fractal; grid; jensen; lett; lichtenberg; multifractal; niemeyer; phys; plane; procaccia; ramification; rev; separation; streamers; structure; surface; value; vol; voltage; wiesmann
- versions: original; plain text
- ap-594
- author: Ficker, T.; Kapička, V.; Macur, J.; Slavíček, P.; Benešovský, P.
- title: Fractality of Electrostatic Microdischarges on the Surface of Polymers
- date: 2004-01-04
- words: 2455
- flesch: 62
- summary: This hypothesis has proved to be sound and is illustrated by Figs. 4 – 6 in which the increasing linear dependence D aU b� � is well recognisable. These visible tracks are called Lichtenberg figures and have often been used to study gaseous discharges on the surface of dielectrics
- keywords: analysis; czech; dependence; dimension; electret; electric; electrode; electrostatic; figures; forming; fractal; grid; high; house; http://ctn.cvut.cz/ap/; lichtenberg; long; microdischarges; multifractal; pet; phys; polymeric; polytechnica; publishing; states; surface; technical; times; university; vol; voltages
- versions: original; plain text
- ap-596
- author: Jiroušek, P.
- title: Programming a Logical Control Method by a Parallel Process
- date: 2004-01-04
- words: 2652
- flesch: 57
- summary: There exist higher level of logical control program systems such as STEP 5 and GRAFCET. Unlike other program systems, for instance systems support- ing the GRAFCET, verification is performed in graphical form.
- keywords: acta; actions; address; compiler; condition; control; czech; development; example; functions; grafcet; higher; house; http://ctn.cvut.cz/ap/; language; logical; means; parallel; parallelism; polytechnica; primas; problem; processes; program; publishing; real; running; set; system; tasks; technical; time; tuning; university; use; vol
- versions: original; plain text
- ap-5960
- author: Sunu, Putu Wijaya; Anakottapary, Daud Simon; Suarta, I Made; Santosa, I Dewa Made Cipta; Suarsana, Ketut
- title: HEAT TRANSFER ENHANCEMENT AND FRICTION IN DOUBLE PIPE HEAT EXCHANGER WITH VARIOUS NUMBER OF LONGITUDINAL GROOVES
- date: 2020-12-31
- words: 5743
- flesch: 58
- summary: However, up to now, there have been few investigations and applications of longitudinal grooves in relation to heat transfer associated with friction from the annulus of a heat exchanger. The present investigation examined the effects of longitudinal grooves in a double pipe heat exchanger on the characteristics of heat transfer and friction.
- keywords: acta; annulus; capacity; channel; characteristics; cold; compensation; data; diameter; doi:10.1016; double; drop; effectiveness; engineering; enhancement; equation; exchanger; experimental; factor; figure; flow; fluid; friction; friction factor; grooved annulus; grooves; heat; heat exchanger; heat transfer; higher; hot; hydraulic; increase; international; journal; longitudinal; longitudinal grooves; mass; ntu; number; performance; pipe; pipe heat; polytechnica; pressure; rate; reynolds; science; section; smooth; smooth annulus; study; sunu; surface; temperature; test; thermal; transfer; transfer enhancement; tube; value; water
- versions: original; plain text
- ap-5963
- author: Castro Silva, Janaina Oliveira; Maia, Cristiana Brasil
- title: OPTIMIZATION OF A SMALL SOLAR CHIMNEY
- date: 2020-07-01
- words: 5996
- flesch: 51
- summary: Exergy efficiency and solar chimney efficiency were determined, on an hourly basis, for a one-year period. Keywords: Solar chimney, optimization, conjugate directions, variable metric. 1.
- keywords: acta; airflow; ambient; analysis; average; brasil; castro; chimney; chimney efficiency; chimney power; collector; conjugate; conversion; desalination; developed; diameter; dimensions; doi:10.1016; efficiency; energy; engineering; exergy efficiency; experimental; figure; function; generation; geometric; geometry; ground; heat; height; higher; influence; inlet; literature; maia; management; manzanares; mass; mathematical; methods; model; monthly; numerical; objective; oliveira; optimization; outlet; output; parameters; performance; plant; polytechnica; power; prototype; radiation; rate; reference; renewable; results; silva; small; solar; solar chimney; solar collector; solar energy; solar radiation; study; surface; sustainable; system; temperature; values; variable; velocity; year
- versions: original; plain text
- ap-598
- author: Audy, M.; Šejnoha, M.
- title: Effect of Boundary Constraints in the Formulation of the Partition of Unity Method: One-dimensional Setting
- date: 2004-01-04
- words: 5168
- flesch: 64
- summary: 1. �u represents a portion of � with prescribed displacements u while tractions t are prescribed on � �� � � �t u t d� � � 0 . 1: Body � crossed by discontinuity �d ity surface �d divides the body into two subdomains, � � and � � (� � �� � �� ).
- keywords: b b; b k; boundary; configuration; constraints; d b; d �; degrees; dimensional; discontinuity; discontinuous; displacement; element; f k; field; fig; form; freedom; k d; k h; k k; k �; matrix; node; partition; problem; results; solution; standard; stiffness; t d; unity; university; vol; � n; � u
- versions: original; plain text
- ap-5981
- author: Schmidt, Jaroslav; Janda, Tomáš; Zemanová, Alena; Zeman, Jan; Šejnoha, Michal
- title: NEWMARK ALGORITHM FOR DYNAMIC ANALYSIS WITH MAXWELL CHAIN MODEL
- date: 2020-12-31
- words: 5898
- flesch: 64
- summary: The relative errors were calculated according to ||r∆t − rref∆t||2/||r ref ∆t||2, where r∆t stores displacements of all time instants for time step ∆t, rref∆t the reference solution of odeint at the same times, and ‖•‖ denotes the Euclidean norm. Top, center, and bottom graphs show trajectories for time steps ∆t = 1.0 s, ∆t = 0.5 s, and ∆t = 0.2 s respectively.
- keywords: acceleration; acta; algorithm; analysis; cell; chain; conditions; corresponding; discrete; discretization; displacement; dissipation; doi:10.1016; dynamic; energy; engineering; equations; evolution; external; f(t; figure; forces; form; fracture; glass; initial; integrator; international; interval; janda; journal; lagrange; laminated; mass; materials; maxwell; mechanics; method; model; motion; newmark; numerical; p(t; p=1; polytechnica; problem; quantities; reference; response; ri+1; r̈i; r̈i+1; scheme; schmidt; section; spring; step; structures; system; time; time t; value; variational; velocity; viscoelastic; vol; work; zemanová
- versions: original; plain text
- ap-5987
- author: Durdán, Milan; Terpák, Ján; Kačur, Ján; Laciak, Marek; Flegner, Patrik
- title: MODELING OF MATERIAL BALANCE FROM THE EXPERIMENTAL UCG
- date: 2020-11-02
- words: 5651
- flesch: 60
- summary: Keywords: Underground coal gasification, material balance, atoms, ex-situ reactors, losses. doi:10.1016/j.pecs.2012.09.004. [2] A. Uppal, A. Bhatti, E. Aamir, et al. Control oriented modeling and optimization of one dimensional packed bed model of underground coal gasification.
- keywords: acta; agent; air; analysis; ash; atomic; atoms; balance; cavity; chemical; coal; coal gasification; coal seam; components; composition; condensate; control; durdán; element; energy; equation; experiment; figure; flow; gasification; gasification process; gasified; general; individual; input; laboratory; losses; mass; mass balance; material; material balance; mathematical; measured; model; modeling; output; oxygen; paper; polytechnica; process; product; production; reactions; reactor; results; scheme; seam; second; situ; syngas; table; temperature; total; ucg; ucg process; unburned; unburned coal; underground; underground coal; value
- versions: original; plain text
- ap-5994
- author: Abdullah, Hikmat N.; Dawood, Zinah O.; Abdelkareem, Ammar E.; Abed, Hadeel S.
- title: COMPLEXITY REDUCTION OF CYCLOSTATIONARY SENSING TECHNIQUE USING IMPROVED HYBRID SENSING METHOD
- date: 2020-09-01
- words: 5267
- flesch: 52
- summary: Non-cooperative scenario Figure 2 shows the performance curves of a number of samples versus the computational complexity ra- tio in cyclostationary of hybrid proposed methods compared with the traditional method. The price we pay for the complexity reduction is a slight loss in Pd as compared with the traditional method, also, it can be seen that although the proposed method using the SDFT hasa greater reduction in the computational complexity than the other proposed methods that use the FFT, it also gives a good detection performance, especially at low values of Eb/N0, since the SDFT has a higher accuracy than the FFT and the performance of other methods becomes the same as the method that uses the SDFT at Eb/N0 equals 6 dB. As shown in the figure, when Eb/N0 equals 0 dB, Pd is decreased by 20 % and 10 % using proposed methods that use the FFT and SDFT respectively, as compared with the hybrid method in [4] and increased by 30 % and 40 % respectively, as compared with the energy de- tector.
- keywords: autocorrelation; channel; cognitive; complexity; computational; computational complexity; cooperative; curves; cyclic; cyclostationary; cyclostationary detector; detection; detection performance; detector; energy; energy detector; fading; fft; figure; frequency; hybrid; hybrid method; information; low; method; multipath; number; o(ns; performance; probability; process; proposed; radio; reduction; results; samples; scenario; sdft; sensing; signal; spectrum; technique; threshold; traditional; traditional method; values
- versions: original; plain text
- ap-600
- author: Kratěna, J.; Fořt, I.
- title: Study of the Discharge Stream from a Standard Rushton turbine impeller
- date: 2004-01-04
- words: 3694
- flesch: 59
- summary: th b t b av p t p av, , , , , ,( ) ( )� �� �2 2 . No. 4/2004 Fig. 6: Three dimensional view of the flat bottomed agitated system with standard Rushton turbine impeller and radial baffles (T � 300 mm, H/T � 1, D/T � 1/3, h/T � 0.33, 0.48, b/T � 0.1, N � 6.7 s�1) Fig. 7: Side view (coordinates r�z) of the half of investigated system with chosen grid 4 Numerical simulation of turbulent liquid flow in a system with a standard Rushton impeller Reynolds averaged Navier-Stokes equations (RANS) to- gether with the Multiple Reference Frame (MRF) and standard k-� model predictions of steady state flow have been used via Fluent 4.5 commercial software with the MIX SIM 1.7 module [13].
- keywords: agitated; angular; baffle; component; coordinate; cylindrical; czech; dimensionless; discharge; discharge stream; experimental; fig; flow; impeller; impeller discharge; liquid; mean; momentum; num; radial; region; results; rushton; standard; stream; system; tangential; target; technical; turbine; turbulent; university; value; velocity; vessel; vol
- versions: original; plain text
- ap-6003
- author: Loskot, Jan; Zubko, Maciej; Janikowski, Zbigniew
- title: ANALYSES OF WASTE PRODUCTS OBTAINED BY LASER CUTTING OF AW-3103 ALUMINIUM ALLOY
- date: 2020-12-31
- words: 4317
- flesch: 61
- summary: In this research, we analysed waste particles gener- ated during laser cutting of a widely used AW-3103 aluminium alloy. Statistical characteristics of waste powder particles.
- keywords: acta; alloy; aluminium; analysis; assist; aw-3103; beam; characteristics; composition; cutting; diameter; diffraction; dross; electron; engineering; feret; figure; formation; gas; health; impact; journal; laser; laser cutting; liquid; material; mean; measurements; metallurgy; microparticles; microscopy; nanoparticles; observed; parameters; particles; polytechnica; powder; process; processing; products; ray; research; results; shape; silicon; size; stainless; steel; surface; thicker; thickness; thinner; tube; waste; waste powder
- versions: original; plain text
- ap-602
- author: Brož, J.; Fořt, I.; Sperling, R.; Jambere, S.; Heiser, M.; Rieger, F.
- title: Pumping Capacity of Pitched Blade Impellers in a Tall Vessel with a Draught Tube
- date: 2004-01-04
- words: 3995
- flesch: 62
- summary: 1: Geometry of the pilot plant tall vessel with a draught tube (the 1st series of experiments); 1 – vessel, 2 – draught tube, 3 – baffle, 4 – impeller (H � 600 mm, T � 400 mm, L � 540 mm, C � 465 mm, DT � 80 mm, D � 70 mm, l � 70 mm, b � 7 mm, R � 400 mm, r � 40 mm) 45° h d Fig. 2: Sketch of pitched blade impellers with three or six blades – Czech Standard CVS 691020: a) nB � 3 : � � 35°, 45°, b ) nB � 6, � � 35°, 45°; h/D � 0.2) 4 31 2 Fig. 3: Geometry of the pilot plant tall vessel with a draught tube (the 2nd series of experiments); 1 – vessel, 2 – draught tube, 3 – baffle, 4 – impeller (H � 470 mm, T � 400 mm, L � 350 mm, C � 400 mm, DT � 160 mm, D � 140 mm, l � 45 mm, b � 15 mm, R � 400 mm, r � 40 mm) (7) the average axial component of the mean velocity over the slot depends on the height of the slot w Q D H const H H DB p T T T T T� � � � . , .0 25 .
- keywords: agitated; angle; axial; blade; capacity; cross; czech; dependence; diameter; dished; draught; draught tube; edge; efficiency; experiments; fig; flow; impeller; liquid; mean; measured; number; pbt; pitch; power; pumping; quantity; rate; ratio; series; slot; system; tube; velocity; vessel; vol
- versions: original; plain text
- ap-604
- author: Abdelaziz, T. H. S.; Valášek, M.
- title: Eigenstructure Assignment by State-derivative and Partial Output-derivative Feedback for Linear Time-invariant Control Systems
- date: 2004-01-04
- words: 6551
- flesch: 69
- summary: A B I Bn n� � �, ,� �2 � � � � � � � � � � � � � � � � � � � � � �2 2 1 0 0 4 0 1 1 0 1 0 0 1 0 1 2 2� �� � �� � a b b3 � � � � �, taking � �v12 1 � c d, T, leads to � ��� � 2 2 2 2 3 4� � � � � � �c d a b c d b d, , , T. Then, the gain matrix equation can be written as K � � � � � � � � � � � � � � � � � � � � � a c b d a b a b c d b b d 2 2 2 2 2 4 3 4 . I BK I BKv v v vij k i n ij k n ij k ij� � � � � � � ( ) ( ) ,1 0 0 .
- keywords: assignment; case; closed; conditions; control; controllable; derivative; derivative feedback; eigenstructure; eigenvalues; eigenvectors; equation; feedback; gain; generalized; j �; k �; linear; loop; matrix; output; parametric; problem; qi �; rank; right; set; solution; state; system; vol; wv �; � bfc; � c; � det; � n; � rn×n; � v; � �
- versions: original; plain text
- ap-6049
- author: Kunz, Jan; Beneš, Petr
- title: VERSATILE CHIRP SINE GENERATOR ON FIXED-POINT FPGA
- date: 2020-12-31
- words: 4560
- flesch: 59
- summary: Conclusion This paper presents an universal point-to-point method of chirp sine signal generation on a fixed- point FPGA. Nowadays, linear and logarithmic chirp sine signals can be generated very easily using, for example, a direct digital synthesis, a voltage controlled oscillator, a look-up table or a phase generation [1, 3, 4].
- keywords: actual; arithmetic; bit; calculated; calculation; chirp; chirp signal; chirp sine; dec; difference; error; f(n; fig; figure; fpga; frequencies; frequency; fstart; fstop; generation; implementation; integration; khz; limitations; linear; logarithmic; method; necessary; number; parameters; phase; point; possible; previous; resolution; result; rounding; sampling; signal; sine; sine signal; speed; sweep; time; versatile; vibration; ϕ(n
- versions: original; plain text
- ap-606
- author: Matz, V.; Kreidl, M.; Šmíd, R.
- title: Signal-to-Noise Ratio Improvement based on the Discrete Wavelet Transform in Ultrasonic Defectoscopy
- date: 2004-01-04
- words: 2380
- flesch: 60
- summary: An important requirement on ultrasonic signal filtering is zero-time shift, because the position of ultrasonic echoes is essential. This is fulfilled for most ultrasonic signals.
- keywords: acta; amplitude; coefficients; czech; decomposition; detailed; discrete; dwt; echo; echoes; fault; fig; filtering; house; http://ctn.cvut.cz/ap/; material; method; mother; noise; polytechnica; publishing; ratio; results; signal; technical; thresholding; transform; ultrasonic; university; value; vol; wall; wavelet
- versions: original; plain text
- ap-6069
- author: Fučík, Radek; Solovský, Jakub; Plampin, Michelle R.; Wu, Hao; Mikyška, Jiří; Illangasekare, Tissa H.
- title: COMPUTATIONAL METHODOLOGY TO ANALYZE THE EFFECT OF MASS TRANSFER RATE ON ATTENUATION OF LEAKED CARBON DIOXIDE IN SHALLOW AQUIFERS
- date: 2021-02-10
- words: 5898
- flesch: 61
- summary: The average temperatures in the static case and background flow experiments were 37◦C and 26◦C, respectively. How- ever, numerical models have not yet been able to fully explain all of the observations from the experimental studies, particularly of those that occur during 2D flow under the influence of background water flow.
- keywords: acta; attenuation; background; background flow; case; co2; computational; constant; data; different; dissolution; doi:10.1016; element; equilibrium; evolution; experimental; figure; flow; form; fraction; fučík; gas; granusil; hand; injection; kinetic; mass; mass transfer; media; mesh; method; methodology; model; modeling; multiphase; non; numerical; permeability; phase; plampin; polytechnica; porous; port; pressure; processes; properties; results; right; s g; saturation; scale; shallow; simulations; solovský; static; study; s−1; table; tank; time; transfer; transport; water
- versions: original; plain text
- ap-6075
- author: Oberhuber, Tomáš; Klinkovský, Jakub; Fučík, Radek
- title: TNL: NUMERICAL LIBRARY FOR MODERN PARALLEL ARCHITECTURES
- date: 2021-02-10
- words: 8105
- flesch: 73
- summary: The library offers an abstract layer for accessing these architectures via unified interface tailored for easy and fast development of high-performance algorithms and numerical solvers. Conclusion We have presented Template Numerical Library, TNL, for easy development of numerical solvers on modern parallel architectures.
- keywords: acta; algorithms; architectures; array; best; bold; boost; c++; cores; cores time; cpu; cuda; data; device; discretization; dofs; eff; efficiency; equation; explicit; face; figure; format; gpu; gpus; grid; hand; heat; implicit; interface; libraries; library; linear; matrices; matrix; memory; mesh; method; modern; number; numerical; oberhuber; parallel; parameters; performance; polytechnica; problem; row; scalability; semi; set; size; solver; sparse; speed; structures; system; table; template; threads; time; tnl; turbo; type; vertexes; weak; −y2
- versions: original; plain text
- ap-608
- author: Bažant, Z. P.; Yu, Q.
- title: Size Effect in Fracture of Concrete Specimens and Structures: New Problems and Progress
- date: 2004-01-05
- words: 7184
- flesch: 66
- summary: As mentioned by Bažant (1996) as well as Hu and Wittmann, the consequence of these experimental observations is that: G a D a P u x x GF F D ( ) ( )� � � � � � � 1 0 0 0 d d� , (1) where GF � average fracture energy in the ligament (Fig. 1b), D � specimen size (Fig. 1a), a0 � notch depth, P � load, u � load-point deflection, � (x) � local fracture energy as a function of coordinate x along the ligament (Fig. 1a left), G w xF � � � � � �d 0 �( ) value at points x remote from the boundary ( � area under the complete �(w) diagram, Fig. 1c), � � cohesive (crack-bridging) stress, and w � crack opening � � separation of crack faces. (11), which is of course valid only for large enough notches penetrating through the boundary layer of concrete, has been derived by asymptotic matching of the following asymptotic conditions: 1) for 0, the classical size effect law � �N D D� � � 0 0 1 21( ) must be recovered; 2) for D l0 0� , there must be no size effect; 3) for D l0 � �, Eqs.
- keywords: 6/2004; acta; analysis; angle; area; asymptotic; bažant; beams; boundary; cohesive; concrete; crack; curve; czech; data; different; duan; effect; end; energy; failure; fig; formula; fpz; fracture; house; http://ctn.cvut.cz/ap/; initiation; large; law; layer; length; ligament; log; mechanics; method; model; notch; notches; polytechnica; process; publishing; quasibrittle; shear; size; size effect; small; softening; specimens; strength; stress; structures; technical; terms; university; variation; vol; wittmann; zone; � n; � �
- versions: original; plain text
- ap-6080
- author: Sváček, Petr
- title: NUMERICAL SOLUTION OF FLUID-STRUCTURE INTERACTION PROBLEMS WITH CONSIDERING OF CONTACTS
- date: 2021-02-10
- words: 5785
- flesch: 65
- summary: |tn+1 ≈ M(U,V ) −LM (V ) (16) for U = (u,p) := (un+1,pn+1), V = (z,q) and with M(U,V ) = 3 2∆t ( un+1,z ) Ωtn+1 , (17) LM (V ) = 2 ∆t (un,z)Ωtn − 1 2∆t ( un−1,z ) +∇q and δK, τK are suitably chosen stabilization parameters, see e.g. The stabilized discrete formulation then reads: Find U = (u,p) ∈ Wh such that aS(U; U,V ) = LS(U; V ) (21) holds for any test function V = (z,q) ∈ X h ×Qh, where aS(U; U,V ) = a(U; U,V )
- keywords: acta; aid; ale; approximation; boundary; computational; condition; configuration; considered; contact; convergence; derivative; discrete; discretization; domain; element; equations; figure; finite; flow; fluid; folds; forces; form; formulation; functions; hertz; impact; instant; mapping; matrix; media; method; model; navier; numerical; order; phonation; polytechnica; porous; prescribed; pressure; problem; projection; reference; results; simplified; solution; stabilization; stabilized; stokes; structure; system; terms; test; time; velocity; vocal; γwt
- versions: original; plain text
- ap-6099
- author: Vocetka, Michal; Suder, Jiří; Huczala, Daniel
- title: THE USE OF THE TWO-HANDED COLLABORATIVE ROBOT IN NON-COLLABORATIVE APPLICATION
- date: 2020-04-30
- words: 3490
- flesch: 45
- summary: Keywords: Collaborative robot, YuMi, industrial robot, industrial automation, semi-collaborativ. A pair of IRB120. 155 M. Vocetka, J. Suder, D. Huczala Acta Polytechnica YuMi would probably not be able to withstand the comparison with industrial robots.
- keywords: abb; acta; analysis; applications; automation; axis; camera; capacity; case; clutch; cobots; collaborative; comparison; control; cycle; design; fem; figure; gripper; handed; housings; https://new.abb.com/products/robotics/cs/prumyslove-roboty/yumi?utm_source=google&utm_campaign=se_roboty_roboty&utm_medium=cpc&utm_term=roboty&utm_content=robot-yumi&gclid=eaiaiqobchmitqtrrj-o4qivqzztch06bayreaayasaaegjvovd_bwe; human; industrial; jaw; line; load; manipulator; march; motor; operator; optimization; polytechnica; possible; press; production; results; robot; safety; small; solution; space; specific; station; time; traditional; use; weight; work; yumi
- versions: original; plain text
- ap-610
- author: Jirásek, M.
- title: Nonlocal Theories in Continuum Mechanics
- date: 2004-01-05
- words: 16537
- flesch: 54
- summary: Taking all this into account and substituting the rate form of (67) into (69), we get the linear differential equation with constant coefficients, ( ) � � �*H Hlp� � �� �� � � � �0 2 . The circular frequency correspond- ing to wave number k is thus � � � � � � 2 1 2 1 2 2 K M ika K M ka K M ka ( cosh ) ( cos ) sin .
- keywords: 6/2004; acta; bar; bažant; behavior; body; boundary; case; certain; characteristic; conditions; continuum; corresponding; curve; czech; d �; damage; density; dependence; diagram; different; differential; dimensional; discrete; dispersion; displacement; distribution; effect; elastic; elasticity; energy; engineering; enriched; enrichments; equation; example; explicit; field; fig; finite; fish; form; fourier; frequency; function; general; gradient; hardening; harmonic; higher; homogeneous; house; http://ctn.cvut.cz/ap/; image �; integral; internal; journal; k �; law; layer; lcrit �; leads; length; limit; linear; loading; localization; long; mass; material; mechanics; model; modulus; nonlocal; numbers; numerical; order; parameter; phase; point; polytechnica; positive; problem; propagation; publishing; r �; real; region; remains; results; scale; section; shear; short; size; small; softening; solution; spatial; specimen; spring; standard; strain; strength; stress; structure; technical; terms; theories; theory; thickness; type; uniform; university; value; variable �; velocity; vol; wave; wavelength; weight; � /a; � f; � y; � �
- versions: original; plain text
- ap-6103
- author: Maharaj, Adhir; Andriopoulos, Kostis; Leach, Peter
- title: PROPERTIES OF A DIFFERENTIAL SEQUENCE BASED UPON THE KUMMER-SCHWARZ EQUATION
- date: 2020-11-02
- words: 4344
- flesch: 65
- summary: As our pri- mary interest is in differential equations integrable in the sense of Poincaré (iewith solutions which are analytically away from isolated polelike singularities) we are disappointed with the results. However, it has been shown [6, 7] that the operator, D + y, generates a sequence of differential equations based upon the Riccati equation, which has very satisfying properties in terms of their singularity characteristics and algebras.
- keywords: -1 -1; 2u′2; analysis; andriopoulos; bis; complete; differential; elements; equation; euler; evolution; exponents; generator; kummer; leach; mathematical; operator; order; properties; recursion; resonances; results; schwarz; sequence; series; singularity; solution; symmetries; symmetry; terms
- versions: original; plain text
- ap-612
- author: Askes, H.; Simone, A.; Sluys, L. J.
- title: Modelling of Size Effect with Regularised Continua
- date: 2004-01-05
- words: 3923
- flesch: 56
- summary: Upon loading, damage grows according to � � � � � �� � � �1 i iexp( ( )) if � �� i (5) in which � is a material parameter that sets the slope of the stress-strain relation in the softening regime. The stress-strain relation is written as � �� �( )1 � C (1) where � and � contain the components of stresses and strains, C contains the elastic moduli and � is a scalar damage vari- able.
- keywords: acta; beams; constant; continuum; damage; dimensions; effect; engineering; fig; fractal; function; gradient; journal; large; law; length; material; mechanics; model; multi; nonlocal; notch; numerical; proportional; range; scale; scaling; size; specimens; strain; strength; stress; structural; university; unnotched; viscoplastic; vol
- versions: original; plain text
- ap-6125
- author: Segeth, Karel
- title: MULTIVARIATE INTERPOLATION USING POLYHARMONIC SPLINES
- date: 2021-02-10
- words: 4979
- flesch: 67
- summary: The conclusion of the present paper is more advanced, it shows that for interpola- tion it is possible to use polyharmonic functions of different orders m that minimize different norms of the interpolant u, i.e. the L2 norm of the (m + They are often used as basis functions for interpolation as well as approximation.
- keywords: approximation; basis; complex; data; definition; derivative; equation; example; formula; function; general; generating; interpolant; interpolation; linear; multiindex; nonnegative; norm; number; order; polyharmonic; problem; properties; r(x; radial; sec; set; smooth; space; spline; system; theorem; trend; values; z(x; |α|
- versions: original; plain text
- ap-6132
- author: Rustam; Gunawan, Agus Yodi; Kresnowati, Made Tri Ari Penia
- title: ARTIFICIAL NEURAL NETWORK APPROACH FOR THE IDENTIFICATION OF CLOVE BUDS ORIGIN BASED ON METABOLITES COMPOSITION
- date: 2020-11-02
- words: 4945
- flesch: 61
- summary: Therefore, this study implements artificial neural networks as pat- tern recognition in clove buds data sets. Materials This study uses clove buds data sets obtained from Kresnowati et al.
- keywords: accuracy; acta; algorithm; approach; architecture; aroma; artificial; backpropagation; buds; case; clove; clove buds; composition; data; data sets; doi:10.1016; equation; error; figure; flavour; function; hidden; hidden layers; identification; input; layer; learning; metabolites; mse; network; neural; neurons; number; origin; output; pattern; percentage; polytechnica; recognition; resilient; resilient propagation; results; sets; small; study; table; testing; testing data; training; training testing; t−1; update; value; weight
- versions: original; plain text
- ap-614
- author: Proft, K. De; Wilde, W. P. De
- title: A Discontinuous Model to Study Fracture of Brittle Materials
- date: 2004-01-05
- words: 5008
- flesch: 65
- summary: 2.3 Governing finite element equations The weak form of the virtual work equation without body forces reads: � � ��� s S S e � � �: d d e� � t (7) where � is taken from the set of admissible displacement vari- ations and Se is the outer surface where external tractions t are applied. i i i iT� � � �� �~ : ~� � �d d 0 (i � 1, … m), (10) where Ti are the traction forces working at the discontinuity �i. To obtain equation (9), the enhanced displacement field, ~u, is assumed to be zero where essential boundary conditions are imposed.
- keywords: applied; case; considered; continuum; crack; deformation; degrees; discontinuity; displacement; elastic; element; energy; engineering; enhanced; equations; experimental; field; fig; finite; fracture; freedom; function; integration; international; journal; load; localization; lvdt; material; mechanics; methods; model; nodes; normal; numerical; partition; path; rate; strain; stress; tensile; tip; unity; university; vol
- versions: original; plain text
- ap-6142
- author: Kračmar, Stanislav; Neustupa, Jiří
- title: MODELING OF FLOWS THROUGH A CHANNEL BY THE NAVIER–STOKES VARIATIONAL INEQUALITIES
- date: 2021-02-10
- words: 7988
- flesch: 72
- summary: η − 1)u 〉 dt = (α− 1) ∫ t∗ 0 〈 ∂tv ∗ ext, u 〉 dt + α(α− 1) ∫ t∗ 0 〈 ∂tu, u 〉 dt + ∫ t∗+δ t∗ 〈 ∂tv ∗ ext, (η − 1)u 〉 dt + ∫ t∗+δ t∗ 〈 ∂t(ηu), ηu 〉 dt− ∫ ∇u dx ≤ ∫ t∗ 0 〈f,u〉 dt + ∫ t∗ 0 ∫ Γ2 g ·u dS dt + 1 2 ‖u(0)‖22, 1 2 ‖u(t∗)‖22 + ∫ t∗ 0 ν‖∇u‖22 dt + ∫ t∗ 0 ∫ Ω (v∗ext + u) ·∇(v ∗ ext + u) · (v ∗ ext + u) dx dt + ∫ t∗ 0 〈∂tv∗ext,u〉 dt ≤ ∫ t∗ 0 ∫ Ω (v∗ext + u) ·∇(v ∗ ext + u) ·v ∗ ext dx dt + ∫ t∗ 0 ∫ Ω ν∇v∗ext : ∇u dx dt +
- keywords: 0,t; appropriate; approximations; artificial; boundary; c(ξ; case; channel; condition; convex; curl; div; ds dt; dx dt; energy; equation; estimates; existence; ext; flow; function; incompressible; inequality; kct; l2(0,t; navier; neustupa; non; pressure; priori; problem; set; solution; space; steady; stokes; t∗+δ; variational; v∗ext; weak; w−v; ξ‖∇u‖22; ∂tv; ∫ t∗; ≤ ∫
- versions: original; plain text
- ap-6149
- author: Neustupa, Tomáš; Winter, Ondřej
- title: ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION
- date: 2021-02-10
- words: 3457
- flesch: 62
- summary: Black, red, blue, and green lines indicate results for prolonged domain (le = 50Di), ξ = 0, ξ = −0.6 and ξ = 0.6, respectively. for ξ = 0,−0.6. −2 0 2 0 0.5 1 y Long ξ = −0.3̄ ξ = −0.5 ξ = −0.6 ξ = 0 −2 0 2 0 0.5 1 y Long ξ = −0.3̄ ξ = −0.5 ξ = −0.6 ξ = 0 Figure 2. u along the boundary Γo, Re = 10, ξ < 0,ξ
- keywords: 50di; artificial; backward; boundary; boundary condition; computational; condition; contours; different; domain; existence; figure; finite; flow; fluid; inflow; inlet; long; long ξ; mathematical; method; n)−; navier; nonlinear; numerical; outflow; pressure; prolonged; results; solution; stokes; term; u =; velocity; volume; weak; −0.3̄; −0.6; −0.6 ξ
- versions: original; plain text
- ap-616
- author: Krysl, P.
- title: Explicit Time Integrators for Nonlinear Dynamics Derived from the Midpoint Rule
- date: 2004-01-05
- words: 2167
- flesch: 62
- summary: The equation of motion is written in the spatial frame as �� � RT, where �� is the rate of the spatial angular momen- tum, and consequently the equation of motion may be written in integral form as � �� � �( ) exp That algorithm may be recognized as the well-known Verlet (explicit Newmark with � �1 2) � � �� � �t t t� 2 2 * � (Verlet).
- keywords: algorithm; body; dynamics; euler; explicit; lie; midpoint; momentum; order; rigid; rotation; rule; second; skew; symplectic; t t; time; vector; � exp; � p; � t; � �
- versions: original; plain text
- ap-618
- author: Patzák, B.; Bittnar, Z.
- title: OOFEM – An Object Oriented Framework for Finite Element Analysis
- date: 2004-01-05
- words: 3764
- flesch: 45
- summary: To achieve these requirements in the context of this frame, the following set of fundamental abstract classes is introduced to represent finite elements (Element class), cross section models (CrossSection class), constitutive mod- els (Material class), integration rules (IntegrationRule class), integration points (IntegrationPoint class), interpolation functions (Interpolation class), and material mode specific containers for storing history variables in integration points (MaterialStatus class). Typical implementation of this procedure then consists in a loop over finite element integration points, and computation of the products of these matrices and summa- tion of the contributions.
- keywords: abstract; acta; analysis; base; boundary; class; classes; code; computers; conditions; constitutive; corresponding; cross; czech; design; element; engineering; equations; example; fig; finite; general; history; house; http://ctn.cvut.cz/ap/; implementation; integration; interface; level; material; matrix; methods; model; module; numerical; object; oofem; particular; points; polytechnica; problem; programming; publishing; section; services; software; solution; sparse; specific; structure; technical; university; vol
- versions: original; plain text
- ap-620
- author: Rypl, D.; Bittnar, Z.
- title: Triangulation of 3D Surfaces Recovered from STL Grids
- date: 2004-01-05
- words: 4677
- flesch: 53
- summary: These are all bg nodes that are not shared exactly by two bg edges. During the averaging, the bg nodes are repositioned to a new location evaluated as a weighted average of bg nodes in the neighbourhood (ac- cording to the so called averaging mask).
- keywords: aspect; averaging; bg edge; bg faces; bg nodes; boundary; classified; control; corresponding; curvature; curve; czech; edge; element; faces; features; fig; file; format; generation; grid; limit; limit surface; mask; mesh; midnode; model; new; non; order; original; point; position; ratio; representation; scheme; stl; subdivision; surface; surface bg; technique; triangulation; vertex; vertices
- versions: original; plain text
- ap-622
- author: Krejčí, T.
- title: Solution of Nonlinear Coupled Heat and Moisture Transport Using Finite Element Method
- date: 2004-01-05
- words: 4570
- flesch: 65
- summary: (15) The assumption that the shear stress in fluids is negligible converts the latter equation into the form � �� ef sp m, (16) where � � � �� � � x y z yz zx xy T T, , , , , , { , , , , , }m 1 1 1 0 0 0 (18) Deformation of a porous skeleton associated with the grain rearrangement can be expressed using the constitutive equation written in the rate form � ( � � )� � �ef sk� D 0 .
- keywords: air; capillary; conditions; czech; div; element; equations; flux; g g; g gw; gas; gra �; grad; heat; k k; linear; mass; material; matrix; media; method; moisture; p p; p t; parameter �; phase; porous; pressure; problems; s s; solution; system; t t; technical; temperature; time; transport; university; vector; vol; w g; w w; water; � ef; � eff; � g; � ga; � n; � x; � �
- versions: original; plain text
- ap-6223
- author: Havlík, Jan; Dlouhý, Tomáš; Krempaský, Jakub
- title: THE CONDENSATION OF WATER VAPOUR IN A MIXTURE CONTAINING A HIGH CONCENTRATION OF NON-CONDENSABLE GAS IN A VERTICAL TUBE
- date: 2020-07-01
- words: 5723
- flesch: 57
- summary: Numerical simulation of air–steam mixture condensation flows in a vertical tube. Effect of an interfacial shear stress on steam condensation in the presence of a noncondensable gas in a vertical tube.
- keywords: acta; air; annulus; concentration; condensable; condensation; condensation htc; condensation process; condensation temperature; condenser; conditions; decrease; difference; effect; experimental; film; film condensation; flow; gas; heat; heat transfer; high; htc; influence; mass; mixture; ncg; non; number; nusselt; partial; polytechnica; presence; pressure; process; pure; pure steam; saturation; shear; steam; steam condensation; steam mixture; stress; surface; temperature; thermal; transfer; tube; value; vapour; velocity; vertical; vertical tube; wall; water; water htc; water vapour
- versions: original; plain text
- ap-624
- author: Fajman, P.
- title: Membrane Triangles with Drilling Degrees of Freedom
- date: 2004-01-05
- words: 2811
- flesch: 71
- summary: Components of the engineering strain � � { , , }� � �x y xy T are obtained applying standard transformation as � � � � �ij ij ij ij ij� �{cos , sin , sin cos } 2 2 �, and in matrix notation � � � � * *� � � ��A A 1 . 4 Element stiffness matrix The pure element stiffness matrix is extended by includ- ing the rigid body motions through the static matrix T ob- tained from the relations between the pure displacements u* { , , , , , }� � � �u u u T21 32 13 1 2 3� � � and the global node displacements u � { , , , , , , , , }u v u v u v T1 1 1 2 2 2 3 3 3� � � .
- keywords: allman; beam; body; cantilever; deflection; displacements; edges; element; elongations; fig; ij ij; matrix; nodal; node; pure; results; rigid; rotations; sides; sin; stiffness; strain; tip; triangular; vector; vol
- versions: original; plain text
- ap-626
- author: Tesárek, P.; Drchalová, J.; Kolísko, J.; Rovnaníková, P.; Černý, R.
- title: Mechanical, Hygric and Thermal Properties of Flue Gas Desulfurization Gypsum
- date: 2004-01-05
- words: 4440
- flesch: 60
- summary: Flue gas desulfurization of one power station block creates up to 20 t of FGD gypsum per hour. FGD gypsum is produced in great quantities, but is in- sufficiently used.
- keywords: basic; calcined; coefficient; common; compressive; conductivity; content; cup; czech; data; days; desulfurization; diffusion; diffusivity; experiment; fgd; gypsum; heat; higher; humidity; hygric; mass; material; measured; measurements; mechanical; method; moisture; production; profiles; properties; reference; relative; resistance; results; samples; specimens; standard; strength; table; temperature; thermal; time; university; vapor; vol; water; wet; čsn
- versions: original; plain text
- ap-628
- author: Doležel, T.; Drdácký, M.; Konvalinka, P.; Kopecký, L.
- title: Experimental Analysis of Sandstone and Travertine
- date: 2004-01-05
- words: 1135
- flesch: 50
- summary: Keywords: sandstone, travertine, EDAX point analysis, microscopic analysis, stress-strain diagram in compression, modulus of elasticity. A three-point bending experiment is usually used to determine material characteristics.
- keywords: analysis; characteristics; compression; czech; diagram; edax; engineering; experimental; fig; material; minerals; point; sandstone; specimen; strain; stress; technical; travertine; university
- versions: original; plain text
- ap-6284
- author: Deuring, Paul; Kračmar, Stanislav; Nečasová, Šárka
- title: NOTE ON THE PROBLEM OF MOTION OF VISCOUS FLUID AROUND A ROTATING AND TRANSLATING RIGID BODY
- date: 2021-02-10
- words: 5407
- flesch: 78
- summary: ∇)u(z) + ∇π(z) = F(z) div u(z) = 0 for z ∈ Ω (1.1) −∆u(z) ψ(r) := ∫ r 0 (1 −e −t) t−1 dt (r ∈ R), Φ(x) := (4 π τ)−1 ψ ( τ (|x|−x1)/2 ) (x ∈ R3), Ejk(x) :
- keywords: analysis; body; boundary; bounded; bs1; case; conditions; decay; deuring; div; domain; equations; estimates; exterior; flow; fluid; incompressible; kračmar; lemma; linear; mathematical; motion; navier; nečasová; oseen; pressure; problem; rigid; rotating; solution; stokes; system; theorem; velocity; viscous
- versions: original; plain text
- ap-6289
- author: Ižvolt, Libor; Dobeš, Peter; Mečár, Martin
- title: TESTING THE SUITABILITY OF THE EXTRUDED POLYSTYRENE (STYRODUR) APPLICATION IN THE TRACK SUBSTRUCTURE
- date: 2020-07-01
- words: 4685
- flesch: 50
- summary: Fig. 8 shows the dependence of the thickness of the crushed aggregate sub-ballast layer on the required value of the static deformation modulus Esi of the sub-ballast upper surface (Esbl) for the standard struc- ture of sub-ballast layers (sub-ballast layer of crushed aggregate only) and higher deformation resistance of the subgrade surface E0 =approx. Placing the XPS at the bottom of sub-ballast layers has several drawbacks, namely: • it must withstand significant traffic loads, • it is worn due to a considerable contact stress with the ballast bed material, • the track substructure may freeze from the side, especially in the case of a railway line in the em- bankment.
- keywords: aggregate; ballast; ballast layers; boards; case; characteristics; deformation; deformation resistance; experimental; extruded; field; fig; figure; impact; insulation; level; load; low; materials; measurements; modified; modulus; mpa; plate; polystyrene; properties; railway; segment; standard; static; static modulus; structure; sub; subgrade; subgrade surface; substructure; surface; testing; thermal; thickness; track; traffic; value; xps
- versions: original; plain text
- ap-630
- author: Řeřicha, P.
- title: Mohr-Coulomb Failure Condition and the Direct Shear Test Revisited
- date: 2004-01-05
- words: 2389
- flesch: 68
- summary: , ( . ),� �� � � �0 5 26 6 1c and sev- eral values of parameter Fig. 6: Modified Mohr-Coulomb for tan . , ( . ),� �� � � �0 5 26 6 1c and several values of parameter Fig. 7: Coulomb for the maximum shear plane tan . ,� � 0 5 ( . ),� � � �26 6 1c and several values of parameter References [1] US Army Corps of Engineers (2003).
- keywords: condition; coulomb; criterion; critical; direct; equation; failure; fig; modified; mohr; n n; normal; orientation; parameter; plane; shear; stress; tan; test; yield; � n
- versions: original; plain text
- ap-6304
- author: Bodnár, Tomáš; Fraunié, Philippe ; Kozel, Karel
- title: MODIFIED EQUATION FOR A CLASS OF EXPLICIT AND IMPLICIT SCHEMES SOLVING ONE-DIMENSIONAL ADVECTION PROBLEM
- date: 2021-02-10
- words: 6134
- flesch: 60
- summary: 7. Remark on applications Based on a detailed knowledge of the diffu- sive/dispersive behavior of numerical schemes, suit- able strategy can be chosen to improve their properties, namely the stability and resolution. This led to a discussion concerning the diffusive and dispersive properties of numerical schemes.
- keywords: advection; advection equation; approximation; a∆x; behavior; central; classical; coefficient; difference; diffusion; diffusive; discrete; dispersion; equation; explicit; family; finite; form; general; implicit; initial; i−1; lax; methods; model; modified; numerical; numerical solution; order; original; problem; properties; schemes; solution; spatial; table; term; time; u(x; u(xi; un+1i; upwind; uxx; viscosity; wendroff; wind
- versions: original; plain text
- ap-632
- author: Kuklík, P.; Kopáčková, M.
- title: Efficient Analytical Model for Calculation of the Influence Zone inside the Subsoil below Foundations Slabs
- date: 2004-01-05
- words: 4266
- flesch: 66
- summary: This equation, when combined with the idea of pseudo-over consolidation, then provides f F h h Hz w w1 2� � � �( ) ( )� � � . (7) yields x r x H f K n r I n xz z n n � � � � � � � � � 0 2 1 2 1 2 1 2 11 0 0 ; ( , ) ( ) ( ) ( )� � � � � � � � � � � �� � � � � � � , ; ( , ) ( ) ( ) ( x r x H
- keywords: analysis; analytical; consolidation; czech; depth; distribution; excavation; fig; finite; foundation; g.w.t; geostatic; house; http://ctn.cvut.cz/ap/; influence; kpa; loading; model; numerical; polytechnica; pressure; soil; solution; state; stress; subsoil; surcharge; table; technical; university; vertical; water; zone
- versions: original; plain text
- ap-634
- author: Teplý, B.; Rovnaník, P.; Keršner, Z.; Rovnaníková, P.
- title: How Reliable is the Durability of RC Structures?
- date: 2004-01-05
- words: 2171
- flesch: 45
- summary: RC_LifeTime offers the following options: Service Life Assessment – a statistical evaluation of service life, where optionally the target value of reliability index � may be an additional input value and then the corresponding service life is the output value Concrete Cover Assessment – a statistical evaluation of concrete cover value for the target service life, where optionally the required concrete cover value may be input in this case and the relevant reliability index � describes the reliability of reinforcement depassivation. Optionally, required concrete cover value may be input and the relevant reliability index � is then an output value (describing the reliability of reinforcement depassivation).
- keywords: approach; assessment; carbonation; concentration; concrete; cover; czech; data; depassivation; depth; design; durability; failure; fig; index; input; life; limit; mean; model; output; random; rc_lifetime; reinforcement; relevant; reliability; service; service life; sls; state; statistical; structures; value; variables; vol
- versions: original; plain text
- ap-636
- author: Novák, D.; Lehký, D.
- title: Neural Network Based Identification of Material Model Parameters to Capture Experimental Load-deflection Curve
- date: 2004-01-05
- words: 4257
- flesch: 52
- summary: Generally, the more sophisticated the model we deal with, the greater the number of model parameters that have to be considered. The aim of this paper is to present a new approach for identifying material model parameters.
- keywords: acta; analysis; approach; atena; compressive; concrete; curve; czech; deflection; engineering; experimental; failure; fig; fracture; function; http://ctn.cvut.cz/ap/; identification; input; layer; lhs; load; material; mechanics; model; mpa; network; neural; neural network; neurons; nonlinear; number; numerical; output; parameters; polytechnica; probabilistic; random; set; simulation; software; statistical; stochastic; strength; structures; technical; training; transfer; university; variables; vol
- versions: original; plain text
- ap-638
- author: Štemberk, P.; Kruis, J.
- title: Fuzzy Dynamic Analysis of a 2D Frame
- date: 2004-01-05
- words: 3180
- flesch: 56
- summary: Keywords: fuzzy numbers, natural frequency, mode shape, response surface function. The results of fuzzy dynamic analysis can be used, e.g., in seismic design of structures based on the response spectrum.
- keywords: -cuts; analysis; approach; arithmetic; computation; concrete; czech; data; design; displacements; distribution; dynamic; element; fig; finite; frame; function; fuzzy; input; material; membership; mode; natural; numbers; order; output; parameters; response; section; seismic; set; sets; shape; space; structures; surface; terms; values; vector; vol
- versions: original; plain text
- ap-640
- author: Křístek, V.
- title: A Shear Lag Analysis for Composite Box Girders with Deformable Connectors
- date: 2004-01-05
- words: 4433
- flesch: 73
- summary: jN j L N j L F�� ( ) ( )� � � � � 2 2 2 2 2 1 0 � � � � , (20) j L F k N t E N t E j s j s s c (11) Substituting for the shear flows sq and cq from equations (1) and (2): � � � � � � � � 2 2 2 2 2 2 1 0s x s s x s n y n x f x � � � � �( ) ( ) , (12) � � � � � � � � 2 2 2 2 2 2 1 0c x c c x c n y n x f x � � � � �( ) ( ) .
- keywords: c c; c p; composite; concrete; e j; flange; g �; j c; j j; j l; j n; j t; kl j; lag; layer; p y; s c; s j; s p; s s; shear; steel; y c; y j; y s; y y; y �; � c; � j
- versions: original; plain text
- ap-642
- author: Wald, F.; Studecká, P.; Kroupa, L.
- title: Temperature of Steel Columns under Natural Fire
- date: 2004-01-05
- words: 4832
- flesch: 61
- summary: g t a t� � � �� � � � � � 4 4 , (2) where hc is the convective heat transfer coefficient Table B2: Steel beam temperatures (°C), numbers of thermocouples, see Figs. 2 and 5 [5]
- keywords: acta; area; beam; behaviour; building; c410; cardington; column; comparison; compartment; concrete; connections; czech; design; elements; end; external; fig; fire; flange; floor; g525; gas; heat; height; house; http://ctn.cvut.cz/ap/; internal; length; load; material; measured; min; natural; no.5–6/2004; paper; polytechnica; prediction; protection; publishing; section; slab; steel; structure; table; technical; temperature; test; thermal; thermocouples; thickness; time; transfer; unit; university; unprotected; vol
- versions: original; plain text
- ap-644
- author: Plachý, T.; Polák, M.
- title: Nondestructive Damage Detection Based on Modal Analysis
- date: 2004-01-05
- words: 4010
- flesch: 56
- summary: Keywords: modal analysis, natural mode, natural frequency, damage detection, MAC, COMAC, service life, fatigue. 0.032 0.001 0.009 10 0.004 0.001 0.042 0.113 0.031 0.039 0.254 0.772 0.181 0.006 0.173 11 0.010 0.001 0.023 0.005 0.004 0.011 0.014 0.135 0.272 0.006 0.011 12 0.023 0.000 0.047 0.000 0.000 0.261 0.002 0.033 0.022 0.326 0.035 Table 1: The bridge across the highway D5 near Vráž – comparison of natural modes from the first and from the second stage of the experimental investigation of the bridge using MAC Eleven natural frequencies, modal shapes and damping frequencies were evaluated after the first stage (the damaged state) of experimental bridge monitoring, and twelve natural frequencies, modal shapes and damping frequencies were evaluated after the second stage (the state after reconstruc- tion) of experimental bridge monitoring.
- keywords: acta; beam; behavior; bridge; change; comparison; czech; damaged; dynamic; experimental; fig; flexibility; girder; house; http://ctn.cvut.cz/ap/; load; matrix; modal; modes; natural; natural modes; no.5–6/2004; polytechnica; publishing; reconstruction; second; state; technical; university; vol
- versions: original; plain text
- ap-646
- author: Šmilauer, V.; Máca, J.; Valášek, M.
- title: Dynamic Bridge Response for a Bridge-friendly Truck
- date: 2004-01-05
- words: 2911
- flesch: 68
- summary: m z k z z a F k z z b F d d 1 1 12 1 2 12 13 1 3 13 2 4 �� ( ) ( ) , � � � � � � � � � � � � (1) I ak z z a aF bk z z b bF d d 01 1 12 1 2 12 13 1 3 2 4 �� ( ) ( ) � � � � � � � � � � � � 13 , (2) � �m z k z z a F k z z t b z d2 2 12 1 2 12 20 2 02 20 2 2�� ( ) ( ) �� � � � � � � � � � � � � �� ( ) ,z t02 (3) � �m z k z z b F k z z t b z d3 3 13 1 3 13 30 3 03 30 3 4�� ( ) ( ) �� � � � � � � � � � � � � �� ( ) ,z t03 (4) F b z z b z a b z a zd f f f12 1 2 02 2 1 12 1 2� � � � � � � �( � � ) ( � � ) ( � � � )� � � � � � �� �k z z k z a zf f10 2 02 12 1 2( ) ( ) ,� (5) F b z z b z b b z b zd r r r13 1 3 03 2 1 12 1 3� � � � � � � �( � � ) ( � � ) ( � � � )� � � � � � �� �k z z k z b zr r10 3 03 12 1 3( ) ( ) ,� (6) z t z zr02 4( ) ,� � (7) z t z zr03 5( ) ,� � (8) where z4, z5 are the bridge displacements and zr is a road ir- regularity. The bridge span varies from 5 to 50 m, covering the majority of real bridges made from concrete or steel with such a statical system [7]: � reinforced concrete bridges – span of 5 to 12 m � prestressed concrete bridges – span of 12 to 30 m � composite steel-concrete bridges – span of 15 to 50 m © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 153 Acta Polytechnica Vol. 44 No.5–6/2004 Fig.
- keywords: active; axle; beam; bridge; bump; car; contact; control; czech; damper; deflections; dynamic; effect; fig; force; friendly; half; model; parameters; passive; polytechnica; rear; response; road; semi; slab; span; suspensions; technical; truck; unevenness; university; valášek; vol
- versions: original; plain text
- ap-648
- author: Němeček, J.; Padevět, P.; Bittnar, Z.
- title: Effect of Stirrups on Behavior of Normal and High Strength Concrete Columns
- date: 2004-01-05
- words: 4314
- flesch: 61
- summary: [16] for concrete columns with pretensioned carbon fiber polymer tubes. [7] Brocca M., Bažant Z. P.: “Size effect in concrete columns: Finite-element analysis with microplane model.”
- keywords: bažant; behavior; columns; compression; computational; concrete; cross; czech; damage; deflection; ductility; effect; element; experiments; failure; fig; finite; high; lateral; load; longitudinal; material; measured; mechanics; microplane; midheight; model; normal; němeček; overall; parameters; peak; post; reinforcement; results; series; size; specimens; steel; stirrups; strain; strength; structural; table; uniaxial; university; values; vol; zone
- versions: original; plain text
- ap-650
- author: Kabele, P.
- title: A Simplified Analysis of the Post-buckling Behavior of a Compressed Reinforcing Bar
- date: 2004-01-05
- words: 3054
- flesch: 62
- summary: (1) and (2) and considering the equiva- lence of bending moment M and the moment due to normal stress, the following relation is obtained: M M K p� �sgn( )� �0 (3) where M Ay A 0 � � � � d (4) and K E Ap h A � � � 2 d (5) and A is the cross-sectional area of the bar. (18), the bar rupture is initiated at P � 4.34 kN and u � 0.0342 m, which correspond to � � 0.804962 rad.
- keywords: analysis; axial; bar; bars; behavior; bending; buckling; central; concrete; cos; czech; displacement; extreme; fem; fig; finite; force; hinges; length; line; load; material; model; moment; plastic; post; reinforcing; section; shape; strain; � �
- versions: original; plain text
- ap-652
- author: Dimitrovová, Z.
- title: A New Methodology to Establish Upper Bounds on Open-Cell Foams Homogenized Properties
- date: 2004-01-05
- words: 12536
- flesch: 68
- summary: 44 No.5–6/2004 Macroload Property Specification of � Specification of E �K K * � � � �� � � �11 22 33 0, �ij i j� � �0 E E E E� � � �11 22 33 0, E i j, 3K E Eij * s� � � �0 � ( ) �1G G1 * � � � �11 22 33 0 0 � � �, ,k; kk �ij i j� � �0 E E E E i jij11 22 33 0 0 � � � �, 21G E E kkk kk s #* ( )� �� �2G G2 * � � � �11 22 33 0 0� � � � � �, i j; ij E E E11 22 33 0� � � , 22G E E The requirement P 0j j� � �1 2 3, , is equiva- lent to the condition under which & �max � � �1,i 2,i 3,i (48) is obtained for each i. Solutions of (48) yield four groups of angles, as specified in Table 5, corresponding to the main di- agonals of the unit cube.
- keywords: acta; additional; bars; basic; beam; bounds; case; cell; cellular; conditions; constant; continuous; contribution; corresponding; cos; cross; cubic; czech; density; dimitrovová; directions; effective; elastic; faria; fig; foams; forces; geometrical; group; house; http://ctn.cvut.cz/ap/; internal; joints; k k; lattice; linear; local; macroload; material; maximality; mech; media; medium; methodology; micro; modulus; necessary; no.5–6/2004; normal; open; optimal; polytechnica; properties; publishing; q q; s �; section; sectional; sin; solids; table; technical; terms; trusses; university; upper; vol; volume; � bm; � �
- versions: original; plain text
- ap-654
- author: Konrad, M.; Chudoba, R.
- title: The Influence of Disorder in Multifilament Yarns on the Bond Performance in Textile Reinforced Concrete
- date: 2004-01-05
- words: 4034
- flesch: 52
- summary: Particular interest is paid to the influence of irregularities in the micro-structure (relative differences in filament lengths, varying bond quality, bond-free length) for different levels of local bond quality between the filament surface and the matrix. The improvement of the local bond performance is counterpro- ductive and results in an earlier failure of the outer filaments with higher bond performance.
- keywords: activation; behavior; bond; bond layer; bond performance; bond quality; bundle; concrete; curve; disorder; displacement; distribution; effect; failure; fig; filaments; force; free; frictional; higher; influence; interaction; layer; length; level; material; matrix; maximum; model; performance; process; pull; quality; scales; stiffness; strength; stress; structure; tau_fric; textile; university; vol; yarn
- versions: original; plain text
- ap-656
- author: Procházka, P. P.
- title: Micromechanics Based Inelastic and Damage Modeling of Composites
- date: 2004-01-05
- words: 5122
- flesch: 62
- summary: The kernel � is defined by: � ��ijkl ijkl jkilG G� � � � � � � � �x x x� � �� � 1 2 , (8) where Gijkl is the Green function of the homogeneous medi- um L0 obeying: L Gijkl kplj ip 0 0� ��� � � x x� �( ) , (9) where ip is the Kronecker symbol and ( )x � � is the Dirac continuous functional. The Lippman-Schwinger equation has the form: � �� � � � � � � �( ) ( ) )( ( ) ( ))� � �� 0 � � � � � � � � � x L x L x x xd (7) in which �0 denotes the strain field (in our case considered to be uniform) that would exist in a comparable homogeneous medium L0 under the same boundary conditions.
- keywords: analysis; behavior; boundary; case; cell; composites; concentration; considered; czech; damage; dvorak; eigenstrains; elastic; equations; fiber; field; homogenization; integral; internal; local; materials; matrix; mechanics; method; nonlinear; numerical; overall; phase; procházka; properties; stiffness; strain; stress; tensor; transformation; u y; unit; university; vol; volume; way; y l; y y; šejnoha; šejnoha j.; � �
- versions: original; plain text
- ap-6575
- author: Yusuff, Adeyinka Sikiru; Popoola, Lekan Taofeek; Anochie, Victor
- title: Utilization of agricultural waste adsorbent for the removal of lead ions from aqueous solutions
- date: 2021-08-31
- words: 5454
- flesch: 54
- summary: SEM micrographs of CMOSW sample (a) prior to and (b) after Pb2+ ions adsorption. FTIR spectra of CMOSW sample (a) prior to and (b) after Pb2+ ions adsorption.
- keywords: acta; adsorbent; adsorption; agricultural; aqueous; area; capacity; carbon; chemical; cmosw; cm−1; concentration; contact; data; dosage; engineering; equilibrium; experimental; figure; freundlich; heavy; influence; initial; ions; isotherm; journal; kinetic; lead; materials; metal; min; model; modified; onion; order; parameters; pb2; percentage; polytechnica; pore; prepared; pseudo; removal; results; sample; science; second; sem; skin; solution; studies; surface; table; textural; thermodynamic; time; toxic; value; waste; wastewater; water; yusuff
- versions: original; plain text
- ap-658
- author: Zeman, J.; Valenta, R.; Šejnoha, M.
- title: On Adequacy of Two-point Averaging Schemes for Composites with Nonlinear Viscoelastic Phases
- date: 2004-01-05
- words: 6727
- flesch: 54
- summary: With the aid of function � r , the n-point probability function Sr1, …, rn can be defined as [21, 22] Sr rn n r rn n1 1 1 1, , ( , , ) ( , ) ( , ) ,� � �x x x x� � � � � (1) where � denotes the ensemble average. Admitting only small strains and isotropic ma- terials, a set of constitutive equations defining the generalized compressible Leonov model can be written as � �m K� , (18) � ( � � ), ,sij ij ij pG e e� � �� �2 , (19) � ( ) ( ), , , , e s s ij p ij eq ij eqa � � � � � � � � � � 1 2 1 2 0 , (20) � � � � � ij m ij ij ij ij M � � � � s s s, , 1 , (21) where �m is the mean stress, � is the volumetric strain, K is the bulk modulus, G� is the shear modulus of the �-th unit and �ij is the Kronecker delta.
- keywords: acta; analysis; applied; average; averaging; behavior; cell; composites; computational; czech; deformation; e12; elastic; element; engineering; equivalent; fiber; fields; fig; finite; function; generalized; house; http://ctn.cvut.cz/ap/; individual; integration; leonov; local; localization; macroscopic; material; matrix; mechanics; method; microstructure; model; modeling; no.5–6/2004; nonlinear; number; numerical; overall; particular; phase; point; polytechnica; publishing; random; rate; response; results; scale; schemes; section; shear; strain; stress; t t; technical; time; unit; university; viscoelastic; vol; volume; šejnoha; � s; � �
- versions: original; plain text
- ap-6580
- author: Siddika, Ayesha; Amin, Md. Ruhul; Rayhan, Md. Abu; Islam, Md. Saidul; Mamun, Md. Abdullah Al; Alyousef, Rayed; Amran, Y. H. Mugahed
- title: PERFORMANCE OF SUSTAINABLE GREEN CONCRETE INCORPORATED WITH FLY ASH, RICE HUSK ASH, AND STONE DUST
- date: 2021-03-01
- words: 8341
- flesch: 60
- summary: Influence of silpozz and rice husk ash on enhancement of concrete strength. The lost strength of the FA and RHA added concrete compared to the control have been recovered, to some extent, after the addition of the SD in the mix.
- keywords: absorption; addition; age; aggregate; area; ash; astm; building; capacity; cement; civil; compressive; concrete; concrete mix; concrete specimens; construction; content; control; density; different; doi:10.1016; durability; dust; effect; energy; engineering; f5r5s10; fig; figure; fine; fineness; flexural; fly; green; green concrete; high; higher; husk; hydration; journal; level; low; lower; materials; matrix; mechanical; mix; natural; optimum; ordinary; partial; performance; polytechnica; products; properties; reduction; replacement; results; rha; rice; sand; siddika; silica; slump; specific; specimens; splitting; standard; stone; strength; study; supplementary; surface; sustainable; sustainable concrete; tensile; test; use; value; waste; water; workability
- versions: original; plain text
- ap-660
- author: Skokánek, J.
- title: Deformation Stress State of Elastic Bodies
- date: 2005-01-01
- words: 6861
- flesch: 56
- summary: (17) After the substitution of �� from Eq. (10) in Eq. (16), the deformation stress equation in general direction of a triaxially loaded body will acquire the form �� � � � � � � � � � � � � � � c E � � � 1 2 2 2 2 3 1 1 1 [( ) cos ] [( ) sin cos ] [( � �� � � �) sin sin ] By putting �� � 0 and � �� 0 2, or , we obtain from this equation the formulas for computation of the angles of zero deformation stresses in the planes x1 x2 and x1 x3 for a tri- axially loaded body cos ( ) ( )( )( ) 2 0 12 1 3 2 1 21 � � � � � � � � � � � � � , (19a) 8 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 45
- keywords: atoms; bodies; body; case; change; components; cos; cross; czech; deformation; deformation force; deformation stress; different; direction; effect; effective; element; elongation; equilibrium; f �; failure; fig; force; internal; loaded; maximum; negative; point; positive; prague; principal; relative; section; shear; spherical; state; strength; stress; stress direction; stress state; stresses; surface; technical; theory; uniaxial; university; vector
- versions: original; plain text
- ap-662
- author: Čepek, A.; Pytel, J.
- title: A Progress Report on Numerical Solutions of Least Squares Adjustment in GNU Project Gama
- date: 2005-01-01
- words: 5487
- flesch: 55
- summary: A UWV VW W V VW U UUll xx� � � � � � � � � � �( ))( )(T1 , (32) Q AQ UWV VW W V UW Vlx xx� � � � � � � � �1 1T . For any real m × n matrix A, m � n, there exists the singular value decomposition A UW V� � (26) � � � � � �U U VV V V1 1, , where U is an m
- keywords: adjustment; algorithm; case; cofactors; columns; condition; coordinates; corresponding; czech; data; decomposition; dependent; equations; free; gama; geodesy; geodetic; gnu; gram; gso; linear; local; matrix; method; model; network; normal; number; numerical; observations; orthogonalization; parameters; points; prague; project; residuals; schmidt; second; set; singular; solution; squares; svd; system; technical; testing; university; unknown; value; vector; vol; xml; � �
- versions: original; plain text
- ap-6637
- author: Kresan, Tetiana; Pylypaka, Serhii; Ruzhylo, Zynovii; Rogovskii, Ivan; Trokhaniak, Oleksandra
- title: EXTERNAL ROLLING OF A POLYGON ON CLOSED CURVILINEAR PROFILE
- date: 2020-09-01
- words: 3512
- flesch: 73
- summary: Keywords: Equilateral polygon, curvilinear profile, external rolling, differential equation, centroids. Curvilinear profiles with different number of turns of a square: a) a square, when completely rolling along the profile, makes two turns; b) a square, when completely rolling along the profile, makes four turns.
- keywords: 1,a; arc; case; centre; centroid; circle; circular; closed; contact; cos; curve; curvilinear; curvilinear profile; elements; equal; equation; fig; gears; length; non; number; point; polygon; position; profile; radius; rolling; sides; square; straight; triangle; vector; vertex
- versions: original; plain text
- ap-664
- author: Brůha, O.; Brůha, T.
- title: Heating and Cooling Anomaly of a Rotating Body
- date: 2005-01-01
- words: 3182
- flesch: 69
- summary: 1: � � � m r h2 , (A2) or: � � � � 0 0 2 0 2 � � m r h t m r t h t , ( ) ( ) ( ) , (A3) and from relation (6, 7) follows: � � � �( )t m r e h e m r h e e t t t t� � � � 0 2 2 0 0 l S r h rx� � � .
- keywords: angular; body; change; cylinder; czech; deformation; e e; e t; energy; expansion; fig; heating; increase; kinetic; t t; technical; temperature; thermal; university; velocity; � ts
- versions: original; plain text
- ap-6650
- author: Haouam, Ilyas
- title: ON THE THREE-DIMENSIONAL PAULI EQUATION IN NONCOMMUTATIVE PHASE-SPACE
- date: 2021-03-01
- words: 7358
- flesch: 68
- summary: Formulation of noncommutative Pauli equation The Pauli equation is the formulation of the Schrödinger equation for spin-1/2 particles, which was formulated by W. Pauli in 1927. Physics Letters A 381(44):3723 – 3725, 2017. doi:10.1016/j.physleta.2017.10.003. 241 http://dx.doi.org/10.1007/s002200050779 http://dx.doi.org/10.1007/PL00005547 http://dx.doi.org/10.1103/PhysRevLett.87.141601 http://dx.doi.org/10.1016/S0370-1573(03)00059-0 http://dx.doi.org/10.30970/jps.24.1801 http://dx.doi.org/10.1142/S0217732305017421 http://dx.doi.org/10.14311/AP.2020.60.0111 http://dx.doi.org/10.30970/jps.24.2002 http://dx.doi.org/10.3390/sym11020223 http://dx.doi.org/10.4236/ojm.2019.93003 http://dx.doi.org/10.1088/1361-6404/ab7495 http://dx.doi.org/10.6122/CJP.51.94 http://dx.doi.org/10.1088/1674-1137/32/5/002 http://dx.doi.org/10.1088/0253-6102/41/6/837 http://dx.doi.org/10.1016/j.physleta.2017.10.003 Acta Polytechnica 61(1):230–241, 2021 1 Introduction 2 Review of noncommutative algebra 3 Pauli equation in noncommutative phase-space 3.1 Formulation of noncommutative Pauli equation 3.2 Deformed continuity equation 3.3 Derivation of the magnetization current 4 Noncommutative Semi-classical Partition Function 5 Conclusion Acknowledgements References
- keywords: + −→; acta; algebra; bopp; c −→; case; classical; constant; continuity; continuity equation; corresponding; current; density; dimensional; dirac; electromagnetic; electron; energy; equation; f(x; field; following; function; geometry; h(x; hand; haouam; journal; limit; magnetic; magnetization; mechanics; moyal; noncommutative; noncommutative phase; order; p2x+p; particle; partition; pauli; pauli equation; phase; physical; physics; pnc; polytechnica; presence; probability; product; quantum; relativistic; review; schrödinger; semi; shift; space; spin; spin-1/2; system; term; theory; vol; wave; zncclas,1; βµbb; π̂jncψ; −→ ∇; −→p; −→σ
- versions: original; plain text
- ap-6653
- author: Al-Baidhani, Ali; Al-Taie, Abbas Jawad
- title: Performance characteristics of low carbon waste material to stabilise soil with extremely high plasticity
- date: 2021-10-31
- words: 6361
- flesch: 58
- summary: Figure 7 highlights the variation of SP with BSD content; the LS values are also presented in Figure 7. Variation of SP and LS with various BSD percentages. Also, the effect of curing on the development of soil strength has been included.
- keywords: acta; addition; applied; ash; bsd; bsd mixtures; bsdc; bsdf; bsdf50; building; carbon; cement; characteristics; clay; compressibility; construction; content; curing; debris; decrease; effect; ehps; engineering; expansive; figure; fly; geotechnical; gradation; high; improvement; index; international; journal; laboratory; lcm; limit; linear; low; materials; maximum; min; mixtures; natural; performance; plasticity; polytechnica; potential; pozzolanic; pressure; properties; ratio; reaction; reduction; result; samples; shear; shrinkage; soil; specimens; stabilisation; stone; strength; sustainable; swell; swelling; table; taie; test; time; type; unaltered; values; variation; waste; water
- versions: original; plain text
- ap-666
- author: Almarimi, A.; Pokorný, J.
- title: Schema Management for Data Integration: A Short Survey
- date: 2005-01-01
- words: 4111
- flesch: 58
- summary: Czech Technical University in Prague Schema Management for Data Integration: A Short Survey A. Almarimi, J. Pokorný Schema management is a basic problem in many database application domains such as data integration systems. In general, data integration systems can be classified into data-warehouse and mediator-wrapper systems.
- keywords: acta; application; approaches; common; conf; conflicts; czech; data; data integration; database; different; elements; entity; global; heterogeneity; heterogeneous; information; input; integration; local; mapping; matching; mediation; model; naming; new; object; ontologies; ontology; problem; proc; process; query; querying; representation; schema; schema integration; section; semantic; set; sources; structural; systems; technical; techniques; university; use; view; vldb; vol; xml
- versions: original; plain text
- ap-668
- author: Usama, S.; Montaser, M.; Ahmed, O.
- title: A Complexity and Quality Evaluation of Block Based Motion Estimation Algorithms
- date: 2005-01-01
- words: 8539
- flesch: 71
- summary: Each pixel comparison requires four operations, namely, a subtrac- tion, an absolute-value calculation, one addition, and one division, if the cost of accessing pixels C x k y l( , )� � and R x i k y j l( , )� � � � is ignored. Each pixel comparison also requires three operations, a subtrac- tion, an absolute-value calculation, and one addition, if the cost of accessing pixels C x k y l( , )� � and R x k i y l j( , )� � � � is ignored.
- keywords: 3ss; 4ss; 4×4; acta; algorithm; best; block; block size; cbosa; center; checking; comparison; complexity; cost; csa; czech; different; distortion; effect; frame; fs algorithm; function; mad; matching; minimum; motion; noise; number; osa; ots; overlapped; point; polytechnica; quality; reconstructed; search; search algorithm; searching; sequence; step; step search; step size; tdl; technical; tss; university; video; view; vol; window
- versions: original; plain text
- ap-670
- author: Tesárek, P.; Pavlík, J.; Černý, R.
- title: Comparison of the Capacitance Method and the Microwave Impulse Method for Determination of Moisture Profiles in Building Materials
- date: 2005-01-01
- words: 3211
- flesch: 55
- summary: Keywords: Moisture profiles, capacitance method, microwave impulse method, building materials. Fig. 1: Block diagram of the capacitance device 3 Experimentals methods 3.1 Capacitance method The capacitance device designed in [6] was used for the measurements. There are a variety of methods for determination of mois- ture content.
- keywords: accuracy; boltzmann; building; calibration; capacitance; capacitance method; cement; content; curve; czech; data; determination; experimental; fig; gravimetric; gravimetric method; impulse; impulse method; materials; measured; method; microwave; microwave impulse; moisture; moisture content; paste; porous; prague; profiles; specimen; technical; technique; time; university; vol; voltage; water
- versions: original; plain text
- ap-672
- author: Hodač, J.
- title: 3D Information System of Historical Site – Proposal and Realisation of a Functional Prototype
- date: 2005-01-01
- words: 4544
- flesch: 56
- summary: Czech Technical University in Prague 3D Information System of Historical Site – Proposal and Realisation of a Functional Prototype J. Hodač The development of methods for 3D data acquisition, together with progress in information technologies raises the question of creating and using 3D models and 3D information systems (IS) of historical sites and buildings. Work with 3D data is closely connected with development in computer graphics (virtual reality).
- keywords: 3d data; 3d model; analysis; areas; baroque; basic; castle; conception; cultural; czech; data; documentation; element; fig; functional; fund; geometric; heritage; historical; information; krumlov; main; management; model; non; prague; presentation; project; proposal; prototype; research; results; site; stage; subsystems; system; technical; technologies; theatre; university; use; virtual; vol; work; český
- versions: original; plain text
- ap-6737
- author: Agárdi, Anita; Nehéz, Károly
- title: PARALLEL MACHINE SCHEDULING WITH MONTE CARLO TREE SEARCH
- date: 2021-04-30
- words: 3170
- flesch: 69
- summary: Parallel machine scheduling problem of flexible maintenance activities with fuzzy random time windows. After that, the efficiency of the algorithms is tested with benchmark data, which result, that algorithms are suitable for solving production scheduling problems.
- keywords: algorithm; article; carlo; dates; figure; job; jobs; journal; machine; machine scheduling; maintenance; mathematical; model; monte; node; objective; opt; parallel; parallel machine; problem; production; results; scheduling; scheduling problem; search; section; sequence; setup; setup times; specific; state; table; test; times; tree
- versions: original; plain text
- ap-674
- author: Lemák, D.; Studnička, J.
- title: Influence of Ring Stiffeners on a Steel Cylindrical Shell
- date: 2005-01-01
- words: 5113
- flesch: 65
- summary: In real life, shell structures are used mainly as chimneys, tanks, pipelines and silos. More sophisticated methods for analysing, shell structures are necessary if the conditions are more com- plex.
- keywords: /2005; acta; analysis; beam; behaviour; bending; buckling; calculations; cylindrical; cylindrical shell; czech; deformation; design; diameter; distance; elements; fig; forces; gna; http://ctn.cvut.cz/ap/; internal; length; linear; loading; maximum; middle; model; moment; numerical; optimum; parameters; parametric; polytechnica; prague; ring; ring stiffeners; second; semi; shell; stability; steel; stiffeners; stress; structures; study; technical; thickness; university; vol; wind
- versions: original; plain text
- ap-6754
- author: Ton-That, Hoang Lan
- title: A COMBINED STRAIN ELEMENT TO FUNCTIONALLY GRADED STRUCTURES IN THERMAL ENVIRONMENT
- date: 2020-12-31
- words: 6049
- flesch: 64
- summary: Finite element analysis of functionally graded skew plates in thermal environment based on the new third-order shear deformation theory. [21–23] studied the behaviour of carbon nanotubes reinforced and functionally graded shells and plates respectively. 528 https://doi.org/10.14311/AP.2020.60.0528 https://ojs.cvut.cz/ojs/index.php/ap vol.
- keywords: acta; al2o3; analysis; analytical; behaviour; bending; ceramic; composite; conditions; cylindrical; deflections; deformation; dimensionless; doi:10.1016; element; engineering; environment; figure; finite; formulation; fraction; free; frequencies; graded; h/2; high; international; journal; materials; mechanical; membrane; method; new; node; numerical; order; plates; points; polytechnica; properties; results; shear; shell; si3n4; solutions; strain; strain element; strategy; structures; sus304; table; temperature; theory; thermal; ton; values; van; vibration; volume; zro2
- versions: original; plain text
- ap-676
- author: Kubátová, H.
- title: Modeling by Petri Nets
- date: 2005-01-02
- words: 4965
- flesch: 69
- summary: PN supports such approaches by abstraction techniques that are inherently compatible with the structure of the model, [9]. Definition 1: A net is a triple N = (P, T, F) where � P is a set of places � T is a set of transitions, disjoint from P, and � F is a flow relation F P T T P� � �( ) ( )� for the set of arcs. It is sometimes convenient to define the set Occ(S) of occurrence sequences to be the set of all sequences of the form m m m mn0 0 1 1 2 2 1 1, , , , , , , , ( )t t t t nn� � such that m mi ti i+ i n� � �1 0 1for { , , }� .
- keywords: ack; ackb; acta; arc; bag; colour; coloured; control; cpn; czech; definition; design; elements; fig; finite; firing; fpga; hardware; house; http://ctn.cvut.cz/ap/; implementation; input; model; net; nets; p t; petri; places; polytechnica; post; prague; pre; printer; publishing; set; signal; state; strobe; system; technical; tokens; transition; unit; university; vol
- versions: original; plain text
- ap-678
- author: Bokr, J.; Jáneš, V.
- title: Realization of Logical Circuits with Majority Logical Function as Symmetrical Function
- date: 2005-01-02
- words: 5859
- flesch: 77
- summary: x x x y x x x x( , ) , ( , ) ,3 4 5 3 4 1 20 0 0 1� � � � � � � y x x x x( , )1 3 2 50 1� � � and © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 19 Czech Technical University in Prague Acta Polytechnica Vol. 45 No. 2/2005 a) b) Fig. 6: Map entries of a) y x( )3 0� , b) y i i i( ) ( ) ( ) ( )� � � � � � � � � �1 1 0 1 the functions f x xn n m( , , , , , , )
- keywords: boolean; czech; example; fig; function; k �; s s; symmetrical; technical; university; x w; y x; y �; � s; � �
- versions: original; plain text
- ap-6786
- author: Lechman, Marek; Stachurski, Andrzej
- title: APPLICATION OF GLOBAL OPTIMIZATION TO PREDICT STRAINS IN RC COMPRESSED COLUMNS
- date: 2021-03-01
- words: 5701
- flesch: 70
- summary: FE analysis of failure behaviour of reinforced concrete columns under eccentric compression. Effective flexural stiffness of slender reinforced concrete columns under axial forces and biaxial bending.
- keywords: a(1; a(2; acta; algorithm; axial; bending; columns; compressed; compression; concrete; cross; doi:10.1016; eccentric; eng; equations; equilibrium; experimental; failure; fcm; function; fyk; genetic; global; lechman; loading; local; matlab; members; methods; nonlinear; numerical; optimization; particle; polytechnica; problem; rectangular; reinforcement; results; section; set; sets; solutions; squares; stachurski; steel; strains; struct; structure; swarm; table; warsaw; δi1; δi2; − �; � ss
- versions: original; plain text
- ap-6789
- author: Ermis, Kemal; Caliskan, Mehmet; Tanriverdi, Muammer
- title: DESIGN OPTIMIZATION OF MOVEABLE MOMENT STABILIZATION SYSTEM FOR ACCESS CRANE PLATFORMS
- date: 2021-03-01
- words: 4628
- flesch: 58
- summary: The general structure of aerial work platforms 3 Work method 3.1 Outrigger contact force function formula 3.2 Improvement of aerial work platform structure 3.3 Mathematical model of aerial work platform 3.4 The process of structural and dynamic structural analysis 4 Results and discussion Acknowledgements References Improvement of aerial work platform structure The aim of this study is to increase the working efficiency of aerial work platforms a through lateral extension.
- keywords: acta; adams; aerial; aerial work; analysis; balancing; basket; boom; capacity; centre; chassis; contact; crane; design; determined; distance; dynamic; effect; efficiency; elements; energy; engineering; extension; figure; force; improvements; lateral; limit; load; machine; mass; mathematical; meters; model; modelling; moment; msc; optimization; platform; polytechnica; process; results; rigid; safety; sin(θ; structure; system; telescopic; tipping; turret; vehicle; weight; work; work platform; working
- versions: original; plain text
- ap-6795
- author: Darmanto, Prihadi Setyo; Astina, I Made ; Wardhana, Alfian Kusuma ; Amalia, Alfi ; Syahlan, Arief
- title: NEW METHOD EVALUATION OF DETAIL MATERIAL AND HEAT FLOWS FOR SINGLE STRING CEMENT CLINKER PLANT
- date: 2021-03-01
- words: 11123
- flesch: 66
- summary: Heat flow of kiln feed gas resulting from the calcination process, mostly CO2, exits from SP (Eq. 19): Heat flow of kiln feed entering the SP (Eq. 11): Enkf = mkf ·hkf (Tkf ) (11) (2.)
- keywords: acta; air; analysis; astina; calcination; calciner; cement; clinker; co2; coal; combustion; conservation; consumption; convection; cooler; cooling; cyclone; darmanto; data; design; detail; dust; efficiency; energy; enf; engineering; eqs; equal; equation; equipment; evaluation; exiting; feed; feed gas; fig; flow; flue; formation; fuel; gas; heat; heat conservation; heat flow; heat loss; hhg; high; hkf; hot; international; journal; kcal; kiln; kiln feed; loss; lower; main; mass; mass conservation; mass flow; material; matrix; measurement; method; mgas−kf; mhg; modification; msep−kf; munsep_kf; new; parameters; percentage; planetary; plant; polytechnica; preheater; process; production; radiation; rate; research; results; return; separation; study; surface; system; table; technology; temperature; thg3; thg4; tkf; total; value; vol; wardhana
- versions: original; plain text
- ap-680
- author: Šoch, M.; Lórencz, R.
- title: Solving Inverse Kinematics – A New Approach to the Extended Jacobian Technique
- date: 2005-01-02
- words: 4130
- flesch: 63
- summary: A A A A� �� � �T T( ) 1 has to be utilized. 2.4 Solving Inverse Kinematics Equation (3) can be comprehended as a Linear System A x b� � (10) and thus can be solved by any appropriate method [4].
- keywords: approach; articulated; basic; behavior; computer; constraints; control; cos; czech; effector; element; extended; fig; function; inverse; inversion; jacobian; joint; kinematics; main; method; new; objective; problem; pseudo; q q; rows; segments; sin; singular; solving; standard; step; structure; technical; university; vector; vol
- versions: original; plain text
- ap-6813
- author: Cígler Žofková, Drahomíra; Frankl, Jiří; Frankeová, Dita
- title: Use of thermal analysis for the detection of calcium oxalate in selected forms of plastering exposed to the effects of Serpula lacrymans
- date: 2021-08-31
- words: 3663
- flesch: 57
- summary: Thermal measurements that followed were per- formed on mortar samples taken as part of a construc- tion and technical survey of a structure in Hrádek nad Ohří, where they had been exposed to the long-term effects of Serpula lacrymans activity. For a comparison, mortar samples taken “in situ” from real structures were also subjected to the experiment.
- keywords: acta; activity; analysis; cac2o4; caco3; calcium; calcium oxalate; cm−1; conditions; control; culture; czech; decomposition; dry; figure; formed; ftir; fungi; fungus; growth; hrádek; infrared; laboratory; lacrymans; lime; materials; measured; measurement; mortar; mortar samples; nad; oxalate; plaster; prague; production; range; results; rot; samples; serpula; serpula lacrymans; specimens; spectroscopy; structure; surface; temperature; test; thermal; thermal analysis; water; wood
- versions: original; plain text
- ap-6816
- author: Tuháček, Martin; Franek, Ondřej; Svoboda, Pavel
- title: APPLICATION OF FMEA METHODOLOGY FOR CHECKING OF CONSTRUCTION’S PROJECT DOCUMENTATION AND DETERMINATION OF THE MOST RISK AREAS
- date: 2020-11-02
- words: 4663
- flesch: 54
- summary: Experi- ence from practice proves that the processed project documentation suffers from many shortcomings, this is also confirmed by the following results of the analy- sis of expert opinions, which researches the cause of defects in construction projects [2]. In connection with the effective preparation of construction projects, we increasingly encounter the term Lean Construction
- keywords: analysis; application; areas; building; checking; company; construction; construction project; continuous; control; costs; cycle; czech; data; defects; design; documentation; eur; evaluation; expert; figure; financial; fmea; improvement; index; individual; lean; management; method; number; pdca; phase; possible; preparation; priority; process; professional; project; project documentation; quality; research; risk; rp n; system; table; time; total; use; values; volume; years
- versions: original; plain text
- ap-682
- author: Bokr, J.; Jáneš, V.
- title: Trivial Logic Arrays
- date: 2005-01-02
- words: 8803
- flesch: 72
- summary: � � � � � � �in out ext out int 2 2 Example 7: Design a PLA by means of an operating table (Table 1a) and use a synchronous flip-flop RS as a binary substitutor. 2 Cartesian product of Boolean matrices The Cartesian product M (OP) (op) M of Boolean matrices � � � � � �M q h mij: : ,1, 2, , 1, 2, , 0, 1� � �� i j � � � � � �M : , , , , , , , : ,1 2 1 2 0 1� � �h p j k jk� m denotes a Boolean matrix � � � � � �M OP op q
- keywords: array; cndf; czech; d2 �; example; function �; ij �; ijs �; input; jk �; logic; matrix; object; output; q q; q x; state; system; table; technical; university; vol; xs �; y x; y y; � ik; � j; � k; � t; � xt; � y; � �
- versions: original; plain text
- ap-6833
- author: Minchev, Dmytro S. ; Varbanets, Roman A. ; Alexandrovskaya, Nadiya I.; Pisintsaly, Ludmila V.
- title: Marine diesel engines operating cycle simulation for diagnostics issues
- date: 2021-06-30
- words: 4201
- flesch: 51
- summary: An estimation of the fuel-injection and power load irregularity by engine cylinder; (2.) The ongoing monitoring of marine diesel engines helps to detect the deviations of its parameters early and prevent major failures.
- keywords: acta; blitz; closing; combustion; compression; conditions; cycle; cylinder; data; depas; diagnostics; diesel; difference; engine; equation; exhaust; exhaust valve; experimental; figure; flow; fuel; gas; gases; handy; heat; injection; issues; man; maps; marine; mass; mathematical; maximum; measurements; minchev; model; operating; operation; parameters; polytechnica; pressure; pro; processes; results; rpm; set; simulation; speed; systems; temperature; thermodynamic; timing; transfer; turbocharger; valve; varbanets; variation; zone
- versions: original; plain text
- ap-6836
- author: Dvořáková, Ľubomíra ; Kruml, Stanislav; Ryzák, David
- title: Antipalindromic numbers
- date: 2021-06-30
- words: 5032
- flesch: 70
- summary: 6. Conclusion and open problems In this paper, we carried out a thorough study of antipalindromic numbers and described known results regarding palindromic numbers in order to draw a comparison. In this paper, we define and study antipalindromic numbers: positive integers whose expansion in a certain integer base is an antipalindrome.
- keywords: antipalindromic; antipalindromic number; base; base b; b−12; definition; digits; divisible; equal; example; expansion; following; integer; length; multi; number; number m; odd; palindromes; powers; primes; proof; results; squares; sum; theorem
- versions: original; plain text
- ap-684
- author: Korbel, S.; Jáneš, V.
- title: Implementation of a Microcode-controlled State Machine and Simulator in AVR Microcontrollers (MICoSS)
- date: 2005-01-02
- words: 4682
- flesch: 58
- summary: Keywords: state machine, microcontroller, microprogramming, software implementation of a simulator. Although we have now switched when designing microcomputers to standard circuit control units, state machines are still important.
- keywords: acta; address; application; avr; bits; command; communication; computer; control; czech; data; design; device; environment; fig; house; http://ctn.cvut.cz/ap/; implementation; individual; input; interface; items; level; machine; memory; microcode; microcontrollers; microinstruction; microprogram; outputs; polytechnica; possible; prague; program; reservoir; running; sensor; set; simulator; software; state; state machine; structure; system; technical; university; vol; water; window
- versions: original; plain text
- ap-6850
- author: Pinheiro, Paulo Henrique Barbosa de Souza; Santos, Mayara Helena Moreira Nogueira; Colombini, Angelo Cesar; França, Bruno Wanderley; Fortes, Marcio Zamboti
- title: Detailed modelling and analysis of digital mho distance relay with single-pole operation
- date: 2021-08-31
- words: 6526
- flesch: 58
- summary: An extension of an existing ground distance relay algorithm to include phase distance relays is presented in [3]. There are many types of distance relays, from electromechanical ones to the latest computer relays.
- keywords: acta; aliasing; analysis; anti; breakers; calculation; characteristic; circuit; conditions; confidence; current; data; detailed; detection; different; digital; distance; distance protection; distance relay; electrical; elements; emtdc; evaluation; fault; fault detection; figure; filter; frequency; ground; ieee; impedance; interval; line; location; mesa; mho; mho distance; modelling; operation; paper; phase; polytechnica; positive; possible; power; protection; pscad; relay; resistance; results; samambaia; scenarios; section; sequence; serra; signal; simulated; system; table; time; transform; transmission; trip; types; values; voltage; x(k; zone
- versions: original; plain text
- ap-686
- author: Fišer, P.; Kubátová, H.
- title: Pseudorandom Testing – A Study of the Effect of the Generator Type
- date: 2005-01-02
- words: 5836
- flesch: 68
- summary: LFSR patterns by the Decoder. First we show that the testability and the fault coverage achieved by a certain number of pseudo-random test vectors strictly depend on the tested circuit.
- keywords: area; automata; benchmarks; bist; cellular; circuit; code; column; coverage; cycles; czech; decoder; design; deterministic; different; distribution; faults; fig; generator; ieee; influence; iscas; lengths; lfsr; logic; matching; method; mixed; mode; number; outputs; overhead; patterns; phase; polynomial; polytechnica; prague; prpg; pseudo; random; results; seed; tap; technical; test; type; undetected; university; vectors; vol; weights; words
- versions: original; plain text
- ap-6863
- author: Samsonovich, Semen L.; Fedotov, Boris K.; Rozhnin, Nikolay B.; Goryunov, Roman V.
- title: Results of research on backlash compensation in a power electric drive by low-power electronic device
- date: 2022-04-30
- words: 4675
- flesch: 57
- summary: Keywords: Backlash, backlash compensation device, multi-motor drive, tandem control. Backlash compensation device with input of displacement signals In the well-known scheme with an input of dis- placement control channels (electromechanical spring scheme), a certain constant displacement signal is sup- plied to each channel, equal in magnitude and different in sign.
- keywords: accuracy; backlash; backlash compensation; channel; compensation device; connections; constants; control; cross; decrease; device; displacement; drive; dynamic; efficiency; electric; electric drive; electromechanical; error; error signal; figure; guidance; guidance signal; harmonic; individual; input; kinematic; method; mode; motion; motors; operation; power; research; results; scheme; second; signal; system; thrust; time; torques; values
- versions: original; plain text
- ap-688
- author: Schmidt, J.; Novotný, M.
- title: Scalable Normal Basis Arithmetic Unit for Elliptic Curve Cryptography
- date: 2005-01-02
- words: 5147
- flesch: 66
- summary: i r i� � �, , ( )1� � . The number of clock cycles necessary for one point addition or doubling is then: � � � � C m w m C m w m C const PADD MUL SQR � � � � � � � � � � � � log ( ) ( ) ( ) 2 1 1 1 1 .
- keywords: addition; algorithm; amov; area; bit; bits; clock; critical; curve; cycles; czech; data; digit; elliptic; field; fig; finite; hardware; implementation; input; inversion; itt; level; log; multiplication; multiplier; necessary; number; optimum; path; performance; point; problem; result; ror; rotations; scalability; shifter; space; squarings; step; technical; time; unit; university; vol
- versions: original; plain text
- ap-6885
- author: Diskaeva, Elena Igorevna; Vecher, Olga Vladimirovna; Bazikov, Igor Alexandrovich; Elbekyan, Karine Sergeevna; Diskaeva, Elena Nikolaevna
- title: DEPENDENCE OF THE VISCOSITY COEFFICIENT OF THE NIOSOMAL DISPERSION ON THE TEMPERATURE AND PARTICLE SIZE OF THE DISPERSED PHASE
- date: 2021-04-30
- words: 2922
- flesch: 52
- summary: The main contradictions arise with studying the dependence of viscosity on particle size. The purpose of this work was to conduct an ex- perimental study of the dependence of viscosity co- efficient of a niosomal dispersion based on PEG-12 Dimethicone on particle size and temperature.
- keywords: acta; area; average; bazikov; coefficient; concentration; delivery; dependence; diameter; dimethicone; dispersed; dispersion; drug; electron; fig; figure; formation; formula; journal; niosomal; niosomes; particle; particle size; pharmaceutical; phase; physicochemical; polytechnica; range; scanning; size; stavropol; study; systems; temperature; tissues; university; vesicles; viscosity; viscosity coefficient; volume
- versions: original; plain text
- ap-6888
- author: Aminou Moussavou, Anges A.; Raji, Atanda K.; Adonis, Marco
- title: STRATEGIC MODULATION OF THERMAL TO ELECTRICAL ENERGY RATIO PRODUCED FROM PV/T MODULE
- date: 2021-04-30
- words: 5804
- flesch: 57
- summary: PV cell power dissipation as a function of Rse The parameters representing the PV cell’s internal properties are comprised of a diode, series resistance and parallel resistance. Analysis of solar PV cell performance with changing irradiance and temperature.
- keywords: acta; adonis; analysis; cell; change; characteristics; circuit; conditions; conduction; current; curve; different; dissipation; efficiency; electrical; electrical energy; electrical power; energy; engineering; equation; extrinsic; figure; function; generated; heat; high; impact; increases; journal; losses; material; maximum; model; module; open; parameters; performance; photovoltaic; polytechnica; power; pv cell; pv module; pv power; qcond; radiation; raji; ratio; renewable; resistance; results; rse; series; simulation; solar; solar cell; sustainable; system; technique; temperature; thermal; transfer; useful; voc; voltage; water
- versions: original; plain text
- ap-6889
- author: Chudoba, Josef; Královcová, Jiřina; Landa, Jiří ; Maryška, Jiří; Říha, Jakub
- title: A model of isotope transport in the unsaturated zone, case study
- date: 2022-08-31
- words: 7204
- flesch: 60
- summary: A prediction of radionuclide concentration distribution in groundwater is done by transport simulations along with groundwater flow simulations (both mainly in saturated zone). [6] used in this field do allow for transport simulation in the unsaturated zone, but they show numerical instabilities in the case of dynamically changing flow boundary condition.
- keywords: acta; amounts; article; biosphere; boundary; case; coefficient; concentration; condition; constant; contamination; data; deep; depth; diffusion; distribution; domain; equation; evaporation; evolution; figure; flow; flux; form; groundwater; head; implementation; infiltration; initial; isotope; level; liquid; model; model domain; m−3; near; parameters; phase; polytechnica; precipitation; pressure; radionuclide; repository; results; simulation; simulation time; soil; solution; source; step; studies; study; surface; s−1; time; transport; unsaturated; unsaturated zone; values; water; zone
- versions: original; plain text
- ap-690
- author: Buček, J.; Hlaváč, J.; Matušková, M.; Lórencz, R.
- title: Cost-Effective Architectures for RC5 Brute Force Cracking
- date: 2005-01-02
- words: 4036
- flesch: 68
- summary: A A S i� �( [ ])2 � �B B� ; B B S� � [ ]1 ; The plaintext is assumed to be in A and B. A A S� � [ ]0 ; B B S� � [ ]1 ; for i � 1 to r do A A B� �( ) � �B S i� [ ]2 ; B B A� �( ) � �A S i� �[ ]2 1 ; 3 Current cracking efforts 3.1 Distributed.net The most well-known project aiming to crack the RC5 challenges is organized by Distributed Computing Techno- logies, Inc.
- keywords: algorithm; architecture; array; asic; attacker; bit; bits; block; brute; cost; cpu; cracking; czech; data; decryption; design; distributed.net; element; expansion; fig; force; fpga; general; hardware; key; number; pipelined; prague; purpose; rate; rc5; registers; results; round; secret; section; sequential; structure; table; technical; time; university; vol
- versions: original; plain text
- ap-6903
- author: Senthilkumar, Jadamuni; Kumar, Pavan S. M.; Balasubramanian, Manickam
- title: An Investigation of corrosion of friction welded and post-weld heat-treated AA6061/SiC/graphite hybrid composites
- date: 2021-06-30
- words: 4441
- flesch: 55
- summary: Sriram Vikas et al. studied the influence of post-weld heat treatment (PWHT) and pitting corrosion behaviour of dissimilar aluminium alloy friction stir welds. Corrosion behavior of alumina-aluminum and silicon carbide-aluminum metal-matrix composites.
- keywords: aa6061; alloy; aluminium; balasubramanian; behaviour; composites; continuous; corrosion; corrosion behaviour; corrosion rate; corrosion resistance; effect; fig; figure; fine; friction; grain; graphite; heat; high; hybrid; intermetallic; joints; journal; kumar; loss; materials; matrix; mechanical; metal; microstructure; particles; pitting; post; precipitates; process; rate; region; reinforcement; resistance; samples; senthilkumar; sic; silicon; solution; specimens; sta; stir; treatment; weld; welding
- versions: original; plain text
- ap-692
- author: Bečvář, M.; Štukjunger, P.
- title: Fixed-Point Arithmetic in FPGA
- date: 2005-01-02
- words: 3264
- flesch: 54
- summary: This figure shows, and it is also valid in general, that serial mode multipliers consume considerably a smaller area than parallel mode multipliers. Fixed-point multipliers can be divided into two groups by the type by their operation: serial mode multipliers and par- allel mode multipliers.
- keywords: adder; area; arithmetic; bit; carry; chain; consumption; czech; delay; features; fpga; implementation; implemented; mode; mode multipliers; multipliers; number; operations; parallel; point; prague; response; results; serial; slices; speed; structures; support; technical; time; university; virtex; width; xilinx
- versions: original; plain text
- ap-6922
- author: Daniyan, Ilesanmi; Ale, Felix; Uchegbu, Ikenna Damian ; Bello, Kazeem ; Osazele, Momoh
- title: Process optimization and performance evaluation of a downdraft gasifier for energy generation from wood biomass
- date: 2021-10-31
- words: 8802
- flesch: 56
- summary: [22] reported on the prediction of a high-temperature rapid combustion behaviour of wood biomass particles using a modelling and simulation approach. This work considers the process optimization and performance evaluation of a downdraft gasifier, suitable for energy generation using wood biomass.
- keywords: acta; addition; air; analysis; biomass; carbon; char; chips; combustion; composition; concentration; content; conversion; conversion process; daniyan; design; developed; development; downdraft; drying; effect; efficiency; energy; energy generation; engine; engineering; et al; evaluation; experiments; fact; figure; fuel; function; gas; gas yield; gasification; gasifier; generation; heating; hydrogen; increase; min; model; moisture; nm3; numerical; optimization; optimum; parameters; particle; particle size; performance; physical; plot; polytechnica; process; process optimization; process parameters; producer; producer gas; production; range; rate; reaction; renewable; residence; residence time; results; significant; size; study; system; table; tar; temperature; thermal; time; value; vol; wood; wood biomass; yield
- versions: original; plain text
- ap-6930
- author: Berka, Jan; Ballek, Jakub Vojtěch; Velebil, Ladislav; Purkarová, Eliška; Vagenknechtová, Alice; Hlinčík, Tomáš
- title: CO2 power cycle chemistry in the CV Řež experimental loop
- date: 2021-08-31
- words: 3573
- flesch: 49
- summary: The development technology and applications of supercritical CO2 power cycle in nuclear energy, solar energy and other energy industries. Performance and economic evaluation of supercritical CO2 power cycle coal gasification plant, 2014.
- keywords: carbon; carbon dioxide; chemistry; co2; co2 power; compounds; consumption; control; coolant; cycle; czech; dioxide; efficiency; energy; experimental; figure; gas; heat; helium; high; impurities; journal; loop; maximum; medium; methods; mpa; nuclear; oil; operation; organic; power; power cycles; pressure; project; purification; purity; reactors; sajadian; section; supercritical; supercritical carbon; system; table; technologies; technology; temperature; test; řež
- versions: original; plain text
- ap-6935
- author: Suk, Tomáš; Štroner, Martin
- title: The impact of the air temperature on measuring the zenith angle during the year in the ground layer of the atmosphere for the needs of engineering surveying
- date: 2021-06-30
- words: 6253
- flesch: 57
- summary: 18, pp. 837 – 844. 488 https://doi.org/10.3846/1392-1541.2008.34.61-65 https://doi.org/10.14311/AP.2016.56.0138 Acta Polytechnica 61(3):476–488, 2021 1 Introduction 2 Equipment and experiment 2.1 Equipment 2.1.1 Resistance temperature detector 2.1.2 Datalogger 2.1.3 Shielding and supporting structure 2.1.4 Analysis of the accuracy of temperature measurement of the whole system 2.2 Experiment 2.2.1 Measurement results 2.2.2 Determination of temperature gradient 2.3 Calculations 2.4 Differential equation of the passage of a wave-path 2.4.1 Barrel-Sears formula 2.4.2 Iterative calculation of path 3 Results 3.1 Vertical shifts 4 Real beam trajectory 5 Discussion 6 Conclusion Acknowledgements References Analysis of the accuracy of temperature measurement of the whole system From the above permitted deviations ∆TL and ∆TS, the standard deviations of the logger σL and the sen- sor σS can be calculated using the law of standard deviation transmission σS = ∆TS 2 = approx.
- keywords: accuracy; acta; air; angle; atmosphere; beam; calculated; calculation; change; conditions; curve; data; day; days; determination; determined; deviation; effect; engineering; example; experiment; fig; figure; geodesy; geodetic; gon; gradient; ground; height; impact; index; influence; international; line; logger; martin; measured; measurement; measuring; method; path; point; polytechnica; possible; pressure; range; real; refraction; resistance; results; sensor; shifts; specific; standard; straight; structure; sunny; surface; surveying; temperature; temperature gradient; time; tomáš; trajectory; use; values; vertical; vol; year; zenith; štroner
- versions: original; plain text
- ap-694
- author: Tan, J. K.
- title: Elicitation of Preference Structure in Engineering Design
- date: 2005-01-03
- words: 3152
- flesch: 50
- summary: The selection of the most preferred design solution(s) from a set of efficient design solutions is a subjective matter and depends on the decision maker’s preference. Multiple Criteria Decision Making addresses synthesis and analysis processes through multiple objective optimisation to generate sets of efficient design solutions (i.e. on Pareto surfaces) and multiple attribute decision making to analyse and select the most preferred design solution(s).
- keywords: alternatives; analysis; approach; attributes; criteria; czech; decision; design; designer; efficient; elicitation; engineering; example; fig; learning; maker; making; measures; methods; multiple; optimisation; performance; pitch; preference; preference structure; problem; process; rbm; search; set; solutions; structure; technical; university; utility; vol
- versions: original; plain text
- ap-6953
- author: Nafa, Fares ; Boudouda, Aimad ; Smaani, Billel
- title: ADAPTIVE WAVELETS SLIDING MODE CONTROL FOR A CLASS OF SECOND ORDER UNDERACTUATED MECHANICAL SYSTEMS
- date: 2021-04-30
- words: 6658
- flesch: 65
- summary: Adaptive wavelets sliding mode control. . Adaptive wavelets sliding mode control. .
- keywords: acta; adaptation; adaptive; addition; algorithm; analysis; approach; approximation; arm; awsmc; class; control; controller; convergence; cos; descent; design; dynamics; error; figure; following; form; function; fuzzy; gradient; ideal; ieee; input; international; jc∑; journal; laws; lyapunov; mechanical; mode; mode control; nafa; network; nonlinear; order; paper; parameters; pendubot; pendulum; polytechnica; position; qs2; resolution; response; results; second; section; smc; stability; strategies; strategy; systems; ṡ1; ṡ2; time; ums; underactuated; unknown; use; vector; vol; wavelets; αsgn
- versions: original; plain text
- ap-696
- author: Crostack, H.-A.; Höfling, M.; Liangsiri, J.
- title: Simulation in Quality Management – An Approach to Improve Inspection Planning
- date: 2005-01-03
- words: 4867
- flesch: 56
- summary: Tannock [1] developed a simulation model in order to evaluate inspection strategies according to process capability and cost of quality (COQ). Keywords: simulation, quality, inspection strategies, manufacturing process.
- keywords: acta; arena; capability; characteristic; company; cost; cycle; czech; different; distribution; equipment; example; failure; fig; good; house; http://ctn.cvut.cz/ap/; inspection; inspection strategies; lot; manufacturing; method; model; parts; polytechnica; prague; process; processes; product; production; publishing; quality; quinte; results; rework; sampling; scrap; simulation; strategies; strategy; technical; time; tool; university; value; vol
- versions: original; plain text
- ap-6968
- author: Rindt, Karin; Hrdlička, František; Novotný, Václav
- title: Preliminary prospects of a Carnot-battery based on a supercritical CO2 Brayton cycle
- date: 2021-10-31
- words: 7330
- flesch: 57
- summary: As a part of the change towards a higher usage of renewable energy sources, which naturally deliver the energy intermittently, the need for energy storage systems is increasing. Keywords: Pumped thermal energy storage (PTES), Carnot-battery, power-to-heat-to-power (P2H2P), supercritical CO2 cycle, Brayton cycle, heat exchange, pinch-point analysis.
- keywords: acta; analysis; battery; brayton; brayton cycle; capacity; carnot; co2; cold; cold storage; cycle; difference; discharging; efficiency; electric; energy; energy storage; exchanger; figure; flow; fluid; heat; heat exchanger; high; higher; hot; hot storage; hrdlička; layout; low; mass; material; maximum; minimum; mpa; novotný; pinch; point; polytechnica; possible; power; preliminary; pressure; prospects; ptes; pump; ratio; recompressed; recuperation; reduced; renewable; results; rindt; round; sco2; solar; storage; supercritical; system; tank; temperature; temperature difference; thermal; thermal energy; transfer; trip; trip efficiency; vol; wind; wnet; working
- versions: original; plain text
- ap-698
- author: Ríos, J.; Jiménez, J. V.; Pérez, J.; Vizán, A.; Menéndez, J. L.; Más, F.
- title: KBE Application for the Design and Manufacture of HSM Fixtures
- date: 2005-01-03
- words: 5680
- flesch: 55
- summary: This is the main reason why much research work focuses on specific issues of fixture design (locating and clamping lay- out, fixture force analysis, fixture tolerances analysis, etc.), and address a specific kind of fixtures, e. g., modular fixtures, or consider only parts with a specific kind of geometry, e. g., prismatic forms. 2 Automating the design of fixtures As stated previously, automation of fixture design has been pursued for several years.
- keywords: acta; aeronautical; analysis; application; base; catia; complexity; components; curves; czech; design; design process; designer; development; different; drawing; elements; example; fig; files; fixture; fixture design; general; generation; geometric; geometry; holes; house; hsm; http://ctn.cvut.cz/ap/; icad; information; kbe; kernel; kind; knowledge; language; machining; main; material; modelling; order; particular; parts; polytechnica; prague; process; project; publishing; raw; reasoning; rules; solution; specific; systems; technical; tool; university; use; vacuum; vol; work
- versions: original; plain text
- ap-700
- author: Song, H.; Eynard, B.; Lafon, P.; Roucoules, L.
- title: Towards Integration of CAx Systems and a Multiple-View Product Modeller in Mechanical Design
- date: 2005-01-03
- words: 4149
- flesch: 54
- summary: Product modelling has been recognized as an effective tech- nique for facilitating the representation and management of product data. In such a situation, product modelling oriented to functional design has been widely studied.
- keywords: approach; behaviour; cad; catia; conceptual; customer; czech; data; design; detail; development; different; embodiment; engineering; exchange; fig; file; float; framework; functional; geometric; implementation; information; integration; knowledge; level; linking; modeller; modelling; models; module; multiple; neutral; optimisation; phase; process; product; representation; requirements; research; roucoules; step; structure; systems; technical; university; view; vol
- versions: original; plain text
- ap-7011
- author: Solnař, Stanislav; Medek, Jan; Suleiman, Abubakar Shola; Vyhlídal, Patrik
- title: On a static and dynamic calibration of thermochromic liquid crystals
- date: 2021-08-31
- words: 5067
- flesch: 54
- summary: For TLC measurements, it is also very important to find out if there is only one colour in the image or if the evaluated image is composed of many different Hue values (colours). However, a very important part of accurate TLC measurements is also their calibration, which is necessary for each applied layer.
- keywords: accurate; angle; application; behaviour; calibration; calibration curve; camera; changes; colour; crystals; curve; czech; data; delay; dependence; deviations; different; dominant; dynamic; effect; experiment; figure; heat; hue; illumination; image; intensity; layer; light; liquid; measured; measurement; measuring; method; plate; possible; prague; prepared; range; reference; rgb; sensitivity; static; surface; temperature; thermochromic; time; tlc; tlc layer; tlcs; use; value; water
- versions: original; plain text
- ap-702
- author: Mullineux, G.; Hicks, B.; Medland, T.
- title: Constraint-Aided Product Design
- date: 2005-01-03
- words: 3836
- flesch: 55
- summary: Keywords: constraint modelling, design knowledge, synthesis, product design, product families. posed by resources. 3: Modelling a four bar/six bar straint-aided process for product design.
- keywords: acta; approach; assembly; best; constraint; constraint rules; czech; design; design knowledge; early; engineering; example; fig; function; house; ideas; important; knowledge; model; modelling; number; parameters; parametric; particular; polytechnica; preliminary; process; product; product design; publishing; requirements; rules; set; solution; space; specification; stages; technical; techniques; university; values; variables; variants; vol
- versions: original; plain text
- ap-704
- author: Humble, R.; Millward, H.; Mumby, A.; Price, R.
- title: The Design and Development of Enhanced Thermal Desorption Products
- date: 2005-01-03
- words: 4466
- flesch: 53
- summary: Keywords: thermal desorption, product design, SME. and development techniques is reported in terms of deve- lopment times and project costs, and the wider implications for new product development within small companies are discussed. All the PDR-based KTP programmes are, or have been, fo- cused on product design, and the numbers reflect the UK trend in that the majority have been based in SMEs.
- keywords: acta; analysis; cad; cold; cold trap; companies; company; cooling; czech; design; desorption; development; fig; heated; house; http://ctn.cvut.cz/ap/; impact; international; key; ktp; management; manufacturing; materials; model; module; need; new; new product; order; pdr; pds; performance; phase; polytechnica; prague; process; product; product design; product development; programme; range; research; sample; small; smes; systems; technical; techniques; temperature; thermal; thermal desorption; tools; transfer; trap; trap module; university; valve; vol
- versions: original; plain text
- ap-7041
- author: Karpiuk, Vasyl; Somina, Yuliia; Karpiuk, Fedir; Karpiuk, Irina
- title: Peculiar aspects of cracking in prestressed reinforced concrete T-beams
- date: 2021-10-31
- words: 6130
- flesch: 59
- summary: The theoretical pre-condition of PC is based on the theory of experiment planning, the theory of mathematical 635 V. Karpiuk, Y. Somina, F. Karpiuk, I. Karpiuk Acta Polytechnica I – transfer of prestressing in reinforcement to concrete; II – formation of normal cracks in the zone of pure bending; III – growth of normal cracks and the formation of inclined cracks in shear spans; IV – development of normal and inclined cracks with an intersection of compressed beam flange and formation of new inclined cracks; V.A) – the beam destruction with the displacement of area near the support and with the reinforcement kink; V.B) – the beam destruction due to the prevailing action of the bending moment; V.C) – the beam destruction due to the crushing of the beam rib concrete Figure 3. from 2 to 4 and increasing the thickness ratio of the table overhangs to the working height h/f /h0 from 0.18 to 0.36, the opening width of normal cracks will increase by 14 %, and the opening width of inclined cracks will decrease by 21 and 23|,%.
- keywords: beam; bending; compressed; concrete; cracking; cracks; dangerous; dangerous inclined; data; destruction; elements; experimental; factors; formation; inclined; inclined cracks; increase; increasing; influence; karpiuk; level; load; models; moment; normal; normal cracks; opening; overhangs; prestressed; prestressing; projection; ratio; reinforcement; relative; resistance; rib; section; shear; shearing; span; strength; structures; support; table; test; thickness; transverse; value; width; zone; σsp
- versions: original; plain text
- ap-7051
- author: Djendaoui, Dahmane; Benaissa, Amar; Rabhi, Boualaga ; Zellouma, Laid
- title: Self tunning filter for three levels four legs shunt active power filter with fuzzy logic controller
- date: 2021-06-30
- words: 4596
- flesch: 66
- summary: 7. DC capacitors voltages stabilization To achieve the balance of two input voltages, improve the performance of active power filters and avoid a potential drift of the neutral point (NP), a stabiliza- tion bridge system shown in Fig 8 is inserted. Optimization-based strategy for shunt active power filter control under non-ideal supply voltages.
- keywords: acta; active; apf; benaissa; component; conditions; control; controller; current; diagram; distorted; figure; filter; fuzzy; harmonic; ieee; instantaneous; inverter; leg; legs; levels; linear; load; logic; method; neutral; non; nonlinear; phase; polytechnica; power; proposed; p−q; rabhi; reactive; reference; self; shunt; source; stf; system; theory; unbalanced; voltage
- versions: original; plain text
- ap-706
- author: Tichánek, R.; Španiel, M.; Diviš, M.
- title: Structural Stress Analysis of an Engine Cylinder Head
- date: 2005-01-03
- words: 2643
- flesch: 56
- summary: cylinder head assembly lies on the cylinder, and it is fixed with six pre-pressed bolt connections. The dependency of the heat- -transfer coefficient on surface temperature is shown in Fig.
- keywords: analysis; assembly; boundary; coefficient; combustion; conditions; contact; cooling; cylinder; cylinder head; czech; engine; exhaust; fig; guides; head; head assembly; heat; intake; measured; model; parts; polytechnica; prague; pressure; regions; seats; surface; technical; temperature; thermal; transfer; university; valve; vol
- versions: original; plain text
- ap-7070
- author: Awang, Fatin Farhana; Hassan, Mohd Faiz; Kamarudin, Khadijah Hilmun
- title: Corn starch doped with sodium iodate as solid polymer electrolytes for energy storage applications
- date: 2021-08-31
- words: 4268
- flesch: 60
- summary: wt. % of NaIO3 and (b) 9 wt. % of NaIO3 SPE films. The effect of dopants on the structure, morphology and electrical properties of SPE films was analysed using X-Ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS) analysis.
- keywords: acta; addition; amorphous; applications; applied; blend; bulk; cole; conductivity; content; corn; effect; electrical; electrochemical; electrolyte; figure; films; hassan; higher; impedance; increase; iodate; ion; ionic; ions; journal; lithium; materials; morphology; naio3; polymer; pores; properties; resistance; results; salt; science; sem; sodium; solid; solution; spe; spe films; starch; structure; study; surface; system; technique; temperature; values; wt.%; xrd
- versions: original; plain text
- ap-708
- author: Hoehn, B.-R.; Steingroever, K.; Jaros, M.
- title: Modelling a New Product Model on the Basis of an Existing STEP Application Protocol
- date: 2005-01-03
- words: 4298
- flesch: 60
- summary: 4.2 Standardized specification for the product model for gear units The main problem in using STEP AP 214 for gear data is the lack of any standardization. Therefore the product model for gear units developed by FZG contains clear definitions how to use AP 214 for defining gear data.
- keywords: 214; application; bearings; calculation; converter; czech; data; definitions; elements; entity; exchange; fig; format; fva; gear; gear data; gear units; german; helical; iso; item; model; new; objects; parts; process; product; product model; programs; property; protocol; research; self; standard; step; structure; technical; time; units; university; values
- versions: original; plain text
- ap-7080
- author: Zarei, Najmeh; Anvar, Seyed Ahmad; Goenezen, Sevan
- title: Subjective approach to optimal cross-sectional design of biodegradable magnesium alloy stent undergoing heterogeneous corrosion
- date: 2021-10-31
- words: 5787
- flesch: 57
- summary: Introduction Recently, using magnesium alloy stents in clinical treatments has become relatively common owing to their biosafety, biocompatibility, superior mechani- cal properties, and comparatively larger stiffness than other metallic and polymeric biodegradable stents. and stiffness of the stent are the main mechanical characteristics of biodegradable stents, and any at- tempt to improve these properties reduces the risk of restenosis
- keywords: acta; alloy; approach; artery; balloon; biodegradable; cluster; coronary; corresponding; corrosion; cross; damage; degradation; design; diameter; different; element; engineering; et al; fig; figure; finite; geometry; grogan; loss; magnesium; mas; mass; material; mechanical; model; numerical; optimal; optimization; optimum; percentage; performance; pitting; plaque; polytechnica; present; process; profile; properties; radial; recoil; results; ring; scaffolding; sectional; shows; simulation; srp; srs; st.19; st.24; stent; stiffness; stress; study; subjective; table; thickness; time; variation; vessel
- versions: original; plain text
- ap-7082
- author: Parkhats, Vadzim; Krzywoń, Rafał; Hulimka, Jacek; Kubica, Jan
- title: Determination of bond model for 7-wire strands in pretensioned concrete beam
- date: 2021-12-31
- words: 4313
- flesch: 66
- summary: [2] contains bond models for ribbed and plain reinforcing bars, but not for prestressing strands. In this paper, a review of bond models for tendons found in the literature is done.
- keywords: aramis; beam; bond; bond model; bond stress; code; concrete; correlation; determination; digital; distributions; element; end; equation; et al; experimental; figure; finite; image; length; model; modelling; mpa; prestressed; prestressing; pretensioned; relationship; release; results; ribbed; slip; steel; strain; strands; strength; stress; structures; tendons; tests; values; wire; τmax
- versions: original; plain text
- ap-7088
- author: Bodnár, Tomáš; Dvořák, Rudolf
- title: FOREWORD
- date: 2021-02-10
- words: 1457
- flesch: 44
- summary: He was a long-term member and later the head of the Department of Technical Mathematics at the Faculty of Mechanical Engineering of the Czech Technical University in Prague. Professor Karel Kozel devoted himself to applied mathematics throughout his life and became probably the most authentic successor of the school, that was founded at CTU by Professor Polášek, whose goal and purpose was the direct use of mathematics in solving specific problems of technical practice.
- keywords: acta; applied; czech; department; drsc; engineering; faculty; flow; fluid; institute; karel; kozel; mathematics; member; prague; professional; professor; research; school; technical; thermomechanics; university
- versions: original; plain text
- ap-7089
- author: Bodnár, Tomáš; Dvořák, Rudolf
- title: PŘEDMLUVA
- date: 2021-02-10
- words: 1148
- flesch: 66
- summary: V roce 1964 přešel na Katedru matematiky Fakulty strojní ČVUT v Praze jako odborný asistent. ledna 2021 dlouholetý profesor ČVUT v Praze a vědecký pracovník ÚT AVČR Profesor Karel Kozel je významný český matematik a pedagog, který se po celý svůj život věnoval aplikované a zvláště numerické matematice.
- keywords: acta; aplikované; avčr; byl; byla; celý; drsc; dále; fakulty; fjfi; jako; jeho; jejich; karel; karla; kozel; kozla; matematiky; např; numerické; pak; polytechnica; pracovníky; praze; profesor; proudění; působil; rndr; roce; roku; spolupráce; svůj; technické; tekutin; termomechaniky; vedl; vedoucím; významně; věnoval; úspěšně; ústavu; činnost; členem; čvut; život
- versions: original; plain text
- ap-710
- author: Valášek, M.; Bauma, V.; Šika, Z.
- title: Study of Concepts of Parallel Kinematics Machines for Advanced Manufacturing
- date: 2005-01-03
- words: 1982
- flesch: 58
- summary: If the platform is just a fraction of the frame cube (e.g. 1:5), then the ratio between the workspace and the machine space is much better than for other parallel kinematics concepts. 2 Full parallel kinematics machines In full parallel kinematics machines, all DOFs are realized by the motion of the platform, and the platform is suspended by parallel links with drives on the frame.
- keywords: concept; czech; design; dofs; fig; forming; head; kinematics; links; machines; mechanism; metal; motions; new; parallel; pkm; pkms; platform; redundant; sided; swivel; technical; university; workspace
- versions: original; plain text
- ap-712
- author: Alkin, C.; Imrak, C. E.; Kocabas, H.
- title: Solid Modeling and Finite Element Analysis of an Overhead Crane Bridge
- date: 2005-01-03
- words: 3889
- flesch: 68
- summary: In this study, the calculations apply the F. E. M. rules and DIN standards, which are used for box girder crane bridges. Keywords: overhead crane, finite element method, solid modeling, box girder. and bridges travelling on rails.
- keywords: acta; analysis; box; bridge; crane; czech; decimal; design; displacement; distance; dynamic; element; fig; finite; finite element; girder; load; maximum; method; midpoint; mm2; model; modeling; node; overhead; overhead crane; places; plate; polytechnica; quadratic; rules; shell; solid; stress; study; system; technical; tetrahedral; trolley; university; value; vol; weight
- versions: original; plain text
- ap-714
- author: Bicak, M. M. A.; Belek, H. T.; Göksenli, A.
- title: Vibration Damping of a New Ionic Liquid under Electric Field Effect
- date: 2005-01-03
- words: 2390
- flesch: 54
- summary: Ionic liquids are salts which are fluids at around room tem- perature. Ionic liquids show unusual physical proper- ties such as high ionic conductivity and powerful solution efficiency for various organic and inorganic substrates.
- keywords: acta; conductivity; czech; damping; effect; electric; electrorheological; field; fig; fluids; high; house; http://ctn.cvut.cz/ap/; ionic; liquid; low; magnetic; new; particles; polytechnica; prague; properties; publishing; room; systems; technical; temperature; university; viscosity; vol
- versions: original; plain text
- ap-716
- author: Novotný, J.; Nožička, J.; Adamec, J.; Nováková, L.
- title: Measurement of Two Phase Flow
- date: 2005-01-03
- words: 1787
- flesch: 63
- summary: Keywords: two phase flow, condensation, wet steam, IPI measurement. Fig. The price has to be under $1000 � It must be suitable for IPI measurement © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 73 Czech Technical University in Prague Acta Polytechnica Vol. 45 No. 3/2005 Measurement of Two Phase Flow J. Novotný, J. Nožička, J. Adamec, L. Nováková
- keywords: able; area; camera; ccd; chambers; condensation; course; czech; fig; flow; ipi; light; measurement; method; overheater; particle; prague; pressure; size; source; steam; technical; temperature; university; water
- versions: original; plain text
- ap-718
- author: Coiro, D. P.; Marco, A. De; Nicolosi, F.; Melone, S.; Montella, F.
- title: Dynamic Behaviour of the Patented Kobold Tidal Current Turbine: Numerical and Experimental Aspects
- date: 2005-01-03
- words: 4538
- flesch: 63
- summary: Across the actuator disk the pressure drops and this drop is equivalent to the streamwise force dF on the actuator disk divided by the actuator disk area dA. The elementary force dFu and dFd, respectively on the up- wind and downwind disk, given by the momentum principle, are d du u uF V A V V� ��� ( )2 (1) The rotor has a diameter of 6 meters with 6 radial arms holding three blades with a five-meter span and with a chord of 0.4 m employing the H-LIFT18 airfoil leading to an aspect ratio of 12.5 and to solidity � � 0.4.
- keywords: acta; actuator; aerodynamic; airfoil; angle; axis; blade; chord; coefficient; cos; current; czech; data; disk; downwind; dpa; energy; experimental; fig; hinge; house; http://ctn.cvut.cz/ap/; kobold; lift; model; moment; naca; numerical; performances; pitch; polytechnica; power; prague; publishing; range; results; rotor; sen; solidity; speed; streamtube; tan �; technical; tidal; torque; turbine; university; upwind; v v; variable; vawt; velocity; vertical; vol; wind
- versions: original; plain text
- ap-7190
- author: Hevko, Roman; Zalutskyi, Sergii; Tkachenko, Ihor; Lyashuk, Oleg; Trokhaniak, Oleksandra
- title: Design development and study of an elastic sectional screw operating tool
- date: 2021-10-31
- words: 4892
- flesch: 57
- summary: The works of [10, 11] are dedicated to the develop- ment of screw operating tools with an elastic surface and their theoretical and experimental research. Design scheme (A) and general view (B) of screw operating tool with overlapping elastic sections.
- keywords: agricultural; analysis; angle; auger; bulk; conveyor; damage; design; development; elastic; end; engineering; experimental; figure; general; grain; hevko; installation; mandrel; material; method; operating; operating tool; output; parameters; power; process; production; rate; research; response; ribbon; roller; rpm; screw; screw conveyor; screw operating; sectional; sections; stack; surface; technical; technological; ternopil; times; tool; transportation; tube; value
- versions: original; plain text
- ap-720
- author: Fošumpaur, P.; Čihák, F.
- title: Design and Optimization of a Turbine Intake Structure
- date: 2005-01-03
- words: 2633
- flesch: 63
- summary: (3) The equation of turbulent kinetic energy k is � � � � � � � � � � � � k t C k k k C k k � � � � � � � � � � � � � � � � � � � � � 2 2 u (� �u) .2 �� (4) And the equation of turbulent energy dissipation �: � �� � � � � � � � � � � � � � t C k C C k � � � � � � � � � � � � � � � � � � � � � 2 u 1 ( ) . The basic description of the fluid flux is given by the two Navier-Stokes equations [5] � � � � � � � � � u t u x u p x ui i j j i i� � � � � 1 2 (1) and the continuity equation � �u 0 (2) where ui is the velocity vector component in the direction of the xi axis, � density �m3�s�1], p hydrostatic pressure [Pa], � dynamic viscosity
- keywords: angle; area; czech; design; equations; fig; flow; flux; inlet; layout; modelling; pier; plant; power; power plant; river; scenario; shape; solution; technical; turbine; turbulent; university; velocity; water; weir; width
- versions: original; plain text
- ap-7211
- author: Franek, Ondřej; Jarský, Čeněk
- title: On reducing CO2 concentration in buildings by using plants
- date: 2021-10-31
- words: 4702
- flesch: 49
- summary: The present research describes the effect of plant implementation according to different levels of CO2 concentration of the supply air, specifically with values of 410 ppm corresponding to the year 2020, 550 ppm to the year 2050 and 670 ppm to the year 2100, as well as according to different levels of CO2 concentration in the indoor environment, namely 1000 ppm and 1500 ppm, the illumination of plants in the indoor environment is constant in the model, PPFD equals to 200 µmol m−2 s−1. Based on the performed studies, it is assumed that this finding raises a potential problem in the future with main- taining the required quality of the indoor environment in terms of CO2 concentration with an economic sus- tainability of operation, especially in situations with a requirement for a high quality indoor environment.
- keywords: ability; air; area; buildings; case; co2; co2 concentration; concentration; creq; effect; green; high; h−1; implementation; increase; indoor air; indoor environment; influence; leaves; lighting; maximum; model; m−2; m−3; necessary; office; outdoor; plants; point; pollutant; ppfd; ppm; quality; required; requirement; room; significant; simulation; supply; supply air; s−1; total; values; ventilation; year; µmol
- versions: original; plain text
- ap-722
- author: Macdonald, M.; Rhodes, J.
- title: Finite Element Modelling of Cold Formed Stainless Steel Columns
- date: 2005-01-03
- words: 3785
- flesch: 57
- summary: 5.2 Compression tests In the experimental investigation a series of compression tests to failure were made on stainless steel columns of the lipped channel cross-section as described above. Stress-strain curves derived from tests and design codes are incorporated into non-linear finite element analyses of eccentrically loaded columns and the results obtained are compared with those obtained on the basis of experiments on stainless steel channel columns with the same properties and dimensions.
- keywords: analysis; asce; capacity; channel; codes; cold; columns; concentric; cross; czech; design; eccentric; element; equation; fig; finite; length; linear; lipped; load; loaded; loading; material; non; predictions; properties; results; section; stainless; stainless steel; steel; strain; strength; stress; technical; tensile; tests; university; virgin; yield
- versions: original; plain text
- ap-724
- author: Holický, M.
- title: Fuzzy Optimisation of Structural Performance
- date: 2005-01-03
- words: 4780
- flesch: 46
- summary: For r2 /r1 � 5 it follows from Fig. 3 that for �R � �S � 0.1 r1 the optimum mean is �S � r1 (which is equal to 0.02 ms�2). If the cost ratio CD /C0 is 10 4, then for r2 /r1 � 3 (Fig. 2) and, as above for �R � �S � 0.1 r1, the optimum mean �S of the load effect is about 0.63 r1 (0.0136 ms �2), for r2 /r1 � 5 (Fig. 3) the optimum mean �S of the load effect is about 0.72 r1 (0.0144 m s�2).
- keywords: /c0; acceleration; action; assessment; building; concepts; cost; czech; damage; data; design; deviation; effect; engineering; equation; example; failure; fig; function; fuzziness; fuzzy; limit; load; lower; mean; model; optimisation; optimum; perception; performance; point; probabilistic; probability; public; r(x; randomness; relevant; requirements; standard; structural; technical; university; upper; value; vibration
- versions: original; plain text
- ap-726
- author: Zítek, P.; Vyhlídal, T.
- title: Model Based Control of Moisture Sorption in a Historical Interior
- date: 2005-01-04
- words: 5209
- flesch: 48
- summary: In general, the dynamics of the interior air humidity can be considered subject to the model � � � �V x t t Q x t x t S x t x t q tI L E I x W W I M� � d d ( ) ( ) ( ) ( ) ( ) ( )� � � � � (13) where V is the interior volume, � air density, Q L the in-leak- age of the ambient air, �x the effective diffusion coefficient between the walls and the internal air, SW is the entire wall surface and qM the water input provided by the humidifier ( qM > 0) or dehumidifier (qM < 0). In order to prevent the moisture content from drifting from uD, the in- tegration action has to be added into the controller and the following feed-forward-feedback control action results � � � �� � d d d d � � � ( ) ( ), ( ) ( ) ( ), ( ) t t K t T t T t t K u T t tC I D� � � � � , (12) where the feed-forward gain K TC( , )� , compensating the temperature trend, is given by (11), the unavailable EMC value is computed from the � and T measurements by means of model (3), and KI is an integration gain.
- keywords: absolute; air; air humidity; camuffo; changes; character; constant; content; control; controller; czech; data; drop; emc; equilibrium; exhibits; fig; gain; harmful; henderson; historical; house; humidity; impact; interior; internal; isotherms; k k; mass; materials; microclimate; model; moisture; parameters; prague; process; relative; relative humidity; results; simpson; sorption; state; t t; technical; temperature; university; value; variations; vol; water; wood
- versions: original; plain text
- ap-7273
- author: Dittrich, Jaroslav
- title: Measurement of a quantum particle position at two distant locations: a model
- date: 2022-08-31
- words: 3542
- flesch: 67
- summary: Denoting r ∈ R the coordinate of the measured light particle (mass m), x ∈ R the coordinate of the heavy particle in the left detector (mass M) and y ∈ R that in the right detector (mass M), the free Hamiltonian (without an interaction of the measured particle and detectors) reads H0 = − ℏ2 2m ∂2r − ℏ2 2M ∂2x + V (x + R) − ℏ2 2M ∂2y + V (y − R) , (2) understood as a self-adjoint operator in the state space L2(R3) with the domain H2(R3). (15) Matrices F(r) and G(r) are Hermitian and bounded in r ∈ R according to their construction.
- keywords: acta; approximation; c(t; complete; coupling; detection; detectors; distant; einstein; entanglement; epr; function; hamiltonian; hmτ; initial; interaction; introduction; light; macroscopic; measured; measurement; measuring; mechanics; model; operator; particle; physical; physics; places; podolsky; polytechnica; position; potential; probability; quantum; review; rosen; simultaneous; state; system; theory; time
- versions: original; plain text
- ap-728
- author: Telfer, D.; Spencer, J.
- title: Properties and Performance of a New Compact HF Aerial Design for Multi-Band Operation
- date: 2005-01-04
- words: 3314
- flesch: 56
- summary: Czech Technical University in Prague a) b) c) d) e) f) Fig. 5: a) FF pattern at fd for DM aerial of Fig. Czech Technical University in Prague a) b) c) Fig. 10: a) SWR plot, 7 to 7.1 MHz for DM aerial of Fig. 3,
- keywords: acta; aerial; atu; balanced; band; czech; degrees; design; dipole; elevation; feed; fig; frequency; gain; ground; house; http://ctn.cvut.cz/ap/; lobe; low; matching; mhz; near; nvis; pattern; plot; polytechnica; practical; prague; publishing; radio; range; swr; technical; tuning; unit; university; vol
- versions: original; plain text
- ap-7289
- author: Robert, Ubong Williams; Etuk, Sunday Edet; Agbasi, Okechukwu Ebuka; Umoren, Grace Peter ; Akpan, Samuel Sunday ; Nnanna, Lebe Agwu
- title: Hydrothermally-calcined waste paper ash nanomaterial as an alternative to cement for clay soil modification for building purposes
- date: 2021-12-31
- words: 8838
- flesch: 59
- summary: Analysis of stabilization of soil cement for base of railway track & subgrade. It has been observed that clay soil cannot be used for building design, unless it is modified by firing or with cement.
- keywords: absorption; acta; agbasi; agent; air; analysis; ash; bricks; building; bulk; calcium; cao; capable; capacity; carbon; case; cement; chemical; civil; clay; clay soil; composites; compressive; conductivity; construction; content; decrease; density; development; diffusivity; dioxide; energy; engineering; etuk; figure; flexural; fraction; greater; hcwpan; heat; increases; international; journal; level; mass; materials; matrix; means; mechanical; method; modification; nanomaterial; paper; particles; polytechnica; pores; preparation; production; properties; proportions; purposes; research; results; robert; s. e.; samples; science; silica; similar; sio2; size; soil; sorptivity; specific; stabilization; stabilizer; strength; study; sustainable; table; technique; technology; test; thermal; use; utilization; values; volume; waste; water; weight; work; ± ±
- versions: original; plain text
- ap-7291
- author: Agárdi, Anita; Kovács, László; Bányai, Tamás
- title: Comparision of the walk techniques for fitness state space analysis in vehicle routing problem
- date: 2021-12-31
- words: 7145
- flesch: 56
- summary: The relationship between fitness values and average of fitness distances to other solutions in the case of 2-opt operator Figure 9. In the case of a cycle crossover, the averages of fitness distances are also high when the fitness 677 A. Agárdi, L. Kovács, T. Bányai Acta Polytechnica Figure 12.
- keywords: adaptive; adaptive walk; algorithm; analysis; autocorrelation; average; average distances; average fitness; basic swap; best; best solution; case; child; correlation; cost; crossover; crossover fitness; customers; cycle; cycle crossover; density; depot; downhill; example; figure; fitness; fitness distances; fitness state; fitness values; following; function; hamming distances; interval; landscape; large; operator; opt; optimization; order; order crossover; parent; problem; random; results; reverse; routing; search; second; section; sequence distances; small; solution; solution basic; solution fitness; space; state; swap sequence; system; techniques; time; uphill; vehicle; vrp; walk
- versions: original; plain text
- ap-730
- author: Mitchell, A. J.; McGookin, E. W.; Murray-Smith, D. J.
- title: Implementation of Sliding Mode Observer Based Reconfiguration in an Autonomous Underwater Vehicle
- date: 2005-01-04
- words: 4430
- flesch: 65
- summary: � �� � ( ) ( ) ( ) (� � � � � � � � � � � � �� � � � � � � � M C D J M g1 10 0 � �) ( ) 0 0 � � � � � � � � � M B u 1 (1) where � �� � u v w p q r T, � �� � X Y Z � � � T, � �u � � �r s n T, B(�) is the nonlinear input matrix, C(�) is the matrix of Coriolis and Centripetal terms, D(�) is the damping matrix, g(�) is the vector of gravitational and buoyancy forces and moments, J(�) is the Euler transformation matrix, and M is the mass and inertia matrix. � � � �r c� , (7) � �M C D g B u� ( )� � � � �� � �( ) ( )r r r+ , (8) � ( )� � �� J .
- keywords: able; angle; auv; bias; complete; control; controller; czech; disturbances; error; failure; fault; fig; guidance; heading; input; matrix; method; mode; nonlinear; observer; output; paper; present; reconfiguration; responses; rudder; sensor; signal; smo; state; switching; system; technical; term; university; vehicles; vol; waypoint; � c
- versions: original; plain text
- ap-732
- author: Walker, J. A.; Cossar, C.; Miller, T. J. E.
- title: Simulation and Analysis of Magnetisation Characteristics of Interior Permanent Magnet Motors
- date: 2005-01-04
- words: 4253
- flesch: 55
- summary: The use of magnetic rotor bridges is advantageous in reducing har- monics in the flux density distribution and the addition of the bridge sections can lead to increases in flux-linkage at high current levels. Keywords: permanent magnet, finite element method, flux-linkage measurement, rotor bridges.
- keywords: airgap; axis; bridges; change; circuit; contribution; current; czech; demagnetising; density; difference; direct; distribution; fig; finite; flux; flux density; levels; linkage; magnet; magnetic; magnetisation; miller; motors; open; permanent; phase; position; quadrature; reactance; results; rotor; saturation; simulation; slots; synchronous; technical; test; test motor; university; vol; voltage; winding
- versions: original; plain text
- ap-7335
- author: Adeshara, Jatinkumar V.; Patel, Hardik P.; Deheri, Gunamani B.; Patel, Rakesh M.
- title: Performance of a hydromagnetic squeeze film on a rough circular step bearing: a comparision of different porous structures
- date: 2022-08-31
- words: 3589
- flesch: 64
- summary: Keywords: Hydromagnetic fluid, squeeze film, circular step bearing, surface irregularity, spongy structure. Hydromagnetic squeeze film in rough truncated conical plates, using the Kozeny-Carman-model-based spongy structure, was discussed by Adeshara et al.
- keywords: bearing; carman; case; circular; conical; deheri; effect; equation; figure; film; fluid; globular; hydromagnetic; irmay; irregularity; kozeny; load; model; non; patel; performance; plates; porous; pressure; rough; sphere; spongy; squeeze; structure; surface; tanh; transverse
- versions: original; plain text
- ap-734
- author: Bíla, J.; Tlapák, M.
- title: Ontologies and Formation Spaces for Conceptual ReDesign of Systems
- date: 2005-01-04
- words: 3776
- flesch: 50
- summary: The field which promises the necessary improvements in modelling the semantics is the field of ontologies. Essential points for specifying ontology (with respect to the ontologies discussed in this paper) include: � Purpose and objective of the development and application of the ontology.
- keywords: active; activities; carriers; change; chbeh; chcarr; class; cnstr; cnstr(shape; components; conceptual; control; czech; description; design; diagram; effect; energy; engineering; fields; fig; flow; functions; gas; glb; interaction; knowledge; language; means; modelling; ontologies; ontology; pneu; prague; principles; process; redesign; representation; semantic; space; state; strata; stratum; structure; sub; systems; technical; transms; trns; uml; university; vol; zone
- versions: original; plain text
- ap-7340
- author: Rostova, Hanna; Voyevodin, Victor ; Vasilenko, Ruslan ; Kolodiy, Igor ; Kovalenko, Vladimir ; Marinin, Vladimir ; Zuyok, Valeriy; Kuprin, Alexander
- title: Cavitation wear of Eurofer 97, Cr18Ni10Ti and 42HNM alloys
- date: 2021-12-31
- words: 3193
- flesch: 55
- summary: Cavitation erosion can carry away an amount of metal no lesser than corrosion; hence, the importance of studies on cavitation resistance, which will reduce metal losses and increase the durability and reliability of parts and devices, is obvious. Keywords: Cavitation erosion, wear, steel, hardness, structure, resistance.
- keywords: 42hnm; acta; alloy; austenitic; average; cavitation; cavitation wear; corrosion; cr18ni10ti; destruction; energy; erosion; eurofer; fig; high; journal; martensitic; materials; mechanical; microhardness; microstructure; nickel; nuclear; polytechnica; power; properties; radiation; rate; reactors; resistance; samples; science; size; stainless; steel; structure; studies; surface; water; wear
- versions: original; plain text
- ap-7341
- author: Marín Velásquez, Tomás Darío; Arriojas Tocuyo, Dany Day Josefina
- title: Analysis of factors affecting the efficiency of Jatropha curcas oil as an asphaltene stabiliser
- date: 2022-04-30
- words: 6263
- flesch: 55
- summary: Estimated response surface for AII of crude oil sample A. a surfactant layer that acts as a stabilising agent, so it is to be expected that the oil samples subjected to heating have had a higher efficiency. As can be seen in Table 7, the effect of the fac- tors on the AII of crude oil sample B differs from that obtained in crude oil sample A.
- keywords: acta; aggregates; aii; analysis; applied; arriojas; asphaltene; astm; chemical; composition; crude; crude oil; curcas; curcas oil; dany; day; density; design; different; dispersion; dose; effect; efficiency; experimental; factors; figure; heated; heating; higher; index; influence; interaction; j. curcas; jatropha; josefina; journal; laboratory; marín; model; monagas; oil; oil sample; oils; petroleum; polytechnica; positive; precipitation; products; properties; quadratic; research; response; results; sample; science; significant; spanish; stabiliser; stability; state; surface; table; temperature; value; vegetable; venezuela; viscosity
- versions: original; plain text
- ap-7346
- author: Assaad, Joseph J.; Mata, Matthew ; Saade, Jad
- title: Effect of pigments on bond strength between coloured concrete and steel reinforcement
- date: 2022-04-30
- words: 7481
- flesch: 61
- summary: The findings of this paper reveal that such additions have a rather beneficial effect on the concrete bond 257 J. J. Assaad, M. Matta, J. Saade Acta Polytechnica y = 0.375x + 13.18 R² = 0.71 y = 0.13x + 4.57 R² = 0.71 y = 0.117x + 3.03 R² = 0.71 2.5 3.5 4.5 5.5 12 13 14 15 16 0 1 2 3 4 5 𝜏m ax , M Pa (A CI a nd E C2 ) 𝜏m ax , M Pa (C EB -F IP ) Pigment concentration, % of cement CEB-FIP ACI EC2 Cement = 350 kg/m3 Figure 12. Mixture codification τmax computed by different codes Experimental-to-design bond ratio MPa (τu/τmax) 2 √ f ′c 2.5 √ f ′c ACI 318 EC2 2 √ f ′c 2.5 √ f ′c ACI 318 EC2 350-Control 10.3 12.9 4.5 3 1.1 0.88 2.53 3.84 350-Red-1.5 % 10.9 13.6 4.7 3.2 1.1 0.88 2.52 3.76 350-Red-3 % 11.7 14.6 5.1 3.5 1.54 1.23 3.56 5.19 350-Red-4.5 % 11.8 14.8 5.1 3.5 1.5 1.2 3.47 5.03 350-Grey-3 % 10.9 13.6 4.7 3.2 1.17 0.93 2.69 4.01 350-Grey-4.5 % 11.7 14.6 5.1 3.5 1.2 0.96 2.77 4.03 350-TiO2-1.5 % 11.6 14.5 5 3.4 1.49 1.19 3.43 5.02 350-TiO2-4.5 % 12.3 15.4 5.3 3.7 1.69 1.35 3.88 5.57 350-CBlack-1.5 % 11 13.7 4.8 3.2 1.4 1.12 3.22 4.78 350-CBlack-4.5 % 11.8 14.8 5.1 3.5 1.51 1.21 3.48 5.04 450-Control 11.7 14.6 5.1 3.5 1.62 1.29 3.72 5.42 450-Red-3 % 12.5 15.6 5.4 3.8 1.88 1.5 4.32 6.16 450-Grey-3 % 13 16.3 5.6 4 1.52 1.22 3.5 4.93 450-TiO2-3 % 13.3 16.7 5.8 4.2 1.86 1.49 4.29 5.98 450-CBlack-3 %
- keywords: //doi.org/10.1016; aci; acta; additions; aggregate; assaad; astm; bars; black; bond; bond strength; building; carbon; ceb; cement; cementitious; code; coloured; concentration; concrete; concrete mixtures; content; control; curves; density; design; different; ec2; effect; engineering; experimental; figure; filler; fip; grey; hardened; higher; highest; hrwr; https; hydration; increase; journal; materials; matrix; matta; mechanical; members; micro; microstructure; mixtures; mpa; particle; pigments; polytechnica; properties; reinforcement; relationships; resistance; saade; size; slip; steel; strength; stress; table; tensile; test; tio2; type; values; vol; water; white; τmax; ∆(e
- versions: original; plain text
- ap-7354
- author: Haouam, Ilyas
- title: Dirac oscillator in dynamical noncommutative space
- date: 2021-12-31
- words: 7093
- flesch: 68
- summary: − − E (0) + ) 2 , (76) the condition for the convergence of (75) for the λ = 1 full strength case is |W12| = ∣∣∣E(0)− − E(0)+ ∣∣∣ 2 . The contributions of the different parts of the perturbed Hamiltonian are as follows < nx,ny | V1 | n ′ x,n ′ y >=< nx,ny | (y s)2 psy | n ′ x,n ′ y > = −iℏ 2 √ ℏ 2mω δnx,n′x {√ n ′ y ( n ′ y − 1 )( n ′ y − 2 ) δny ,n′y −3 − √( n ′ y + 1 )( n ′ y + 2 )( n ′ y
- keywords: acta; case; coordinates; correction; different; dimensional; dirac; dnc; dynamical; effect; eigenvalues; energy; equation; field; following; function; hamiltonian; haouam; hermitian; ilyas; imcω; journal; letters; levels; magnetic; mc2; noncommutative; n′y; operators; order; oscillator; parameter; perturbation; physical; physics; pncy; polytechnica; position; psy; psz; quantum; relativistic; review; s y; shift; space; spectrum; string; system; terms; theory; time; variables; xnc; ync)2
- versions: original; plain text
- ap-736
- author: Peebles, C.; Bil, C.; Drack, L.
- title: Intelligent Data Storage and Retrieval for Design Optimisation – an Overview
- date: 2005-01-04
- words: 14992
- flesch: 54
- summary: 5 Compression of design space data With the increasing complexity of design data, and the more widespread use of complex data types such as volumet- ric, spatial and high-resolution imaging, data compression is becoming very important for adequate storage of large volumes of data. Such a system would be capable of efficiently storing (and compressing if required) a range of types of design data into an intelligent database.
- keywords: 4/2005; access; acm; acta; algorithms; analysis; applications; approach; approximation; artificial; aspects; automation; available; cad; cases; common; complex; complexity; compressed; compression; computational; computer; conference; constraints; construction; control; cost; creation; czech; data; data compression; data models; database; database systems; definition; design; design applications; design automation; design data; design optimisation; design process; design space; design system; design variables; designers; different; domain; early; efficient; engineering; example; expert; file; function; fuzzy; generation; genetic; geometric; geometry; house; http://ctn.cvut.cz/ap/; ieee; image; imaging; implementation; important; information; intelligent; international; journal; knowledge; large; literature; lossless; management; medical; memory; methods; modelling; models; new; number; nurbs; object; optimal; optimisation; paper; parameters; pde; performance; points; polytechnica; polytechnica vol; practical; prague; previous; problem; proceedings; process; processes; processing; project; publishing; queries; query; range; relational; relevant; representation; research; results; retrieval; review; search; sets; shape; similar; similarity; small; solid; solution; space; spatial; specific; spline; storage; structures; study; support; surface; system; technical; techniques; terms; time; types; university; usa; use; user; variables; vol; volumetric
- versions: original; plain text
- ap-738
- author: Crosbie, R. E.; Hingorani, N. G.
- title: High-Speed Real-Time Simulators for Engineering Design
- date: 2005-01-04
- words: 3590
- flesch: 49
- summary: RTDS Technologies (Ref [4]) specialize in providing simulation systems customized to specific, large-scale power system simulations. Simulation of a very rapid phenome- non, such as the operation of electronic switches, will execute more slowly than real time to allow observation of the changes taking place.
- keywords: analog; applications; available; board; cases; chico; computer; control; controllers; converters; czech; data; design; devices; digital; dsp; electronic; engineering; example; frame; hardware; high; hsrt; human; inc; low; model; necessary; operating; operation; performance; phase; power; processors; range; real; ref; shorter; simulated; simulation; software; speed; system; technical; time; training; university; use
- versions: original; plain text
- ap-740
- author: Ericsen, T. S.
- title: Physics Based Design, the Future of Modeling and Simulation
- date: 2005-01-04
- words: 5272
- flesch: 52
- summary: The future system design process It is time for system design, particularly Naval Ship de- sign, to evolve. The idea of open plug-and-play architecture is to build power systems in much the same way as personal computers.
- keywords: acs; analysis; applications; behavior; blocks; building; complex; complexity; components; computer; controller; cost; customer; cycle; czech; design; designers; detail; different; digital; electrical; electronic; elements; energy; engineering; ericsen; fig; filter; future; hardware; hil; ieee; interfaces; loop; machine; methods; model; modeling; need; new; parts; pebb; performance; physics; power; process; product; real; requirement; results; sensors; simulation; smart; software; solution; standard; system; technical; thermal; time; today; tools; unit; university; vendor; vol
- versions: original; plain text
- ap-742
- author: Hrouzek, M.
- title: Feedback Control in an Atomic Force Microscope Used as a Nano-Manipulator
- date: 2005-01-04
- words: 2399
- flesch: 53
- summary: Fig. 6 shows control loops affecting the sensitivity of the AFM. In the tapping mode, the tip is touches the surface in each period of cantilever movement at its maximum deflection to- © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 65 Czech Technical University in Prague Acta Polytechnica Vol. 45 No. 4/2005 Feedback Control in an Atomic Force Microscope Used as a Nano-Manipulator M. Hrouzek
- keywords: acta; afm; atomic; cantilever; contact; control; czech; deflection; displacement; feedback; fig; force; frequency; high; interaction; loop; microscopy; mode; movement; noise; piezo; polytechnica; positioning; sample; scanning; sensitivity; signal; stage; surface; systems; technical; techniques; thermal; tip; university; vol
- versions: original; plain text
- ap-744
- author: Coiro, D. P.; Marco, A. de; Nicolosi, F.; Genito, N.; Figliolia, S.
- title: Design of a Low-Cost Easy-to-Fly STOL Ultralight Aircraft in Composite Material
- date: 2005-01-04
- words: 3269
- flesch: 68
- summary: Only in Italy in the last 5–6 years, at least 10 companies have started production of ULM aircraft. TOPULM is defined as: TOPULM TO TO L TO � � � � � � � � � � � � � W P W S C� max ; (1) with W S � � � � � � TO in [N/m2] and W P � � � � � � TO in [N/W]; � � � � 0 .
- keywords: acta; aerodynamic; aircraft; chord; coefficient; czech; design; fig; flight; ground; high; horizontal; house; http://ctn.cvut.cz/ap/; landing; level; lift; loading; maximum; new; optimization; performance; polytechnica; power; publishing; run; sea; speed; stol; tail; technical; ulm; university; vmax; vol; weight; wing
- versions: original; plain text
- ap-7440
- author: Agustina, Tuty Emilia; Gayatri, Rianyza; Bahrin, David ; Moeksin, Rosdiana; Gustini
- title: ZnO-Zeolite nanocomposite application for photocatalytic degradation of procion red and its adsorption isotherm
- date: 2022-04-30
- words: 5850
- flesch: 54
- summary: Impregnation of activated carbon-TiO2 composite and its application in photodegradation of procion red synthetic dye in aqueous medium. Photocatalytic degradation of procion red synthetic dye using ZnO-Zeolite composites.
- keywords: adsorbent; adsorption; adsorption isotherm; adsorption process; application; capacity; concentration; conditions; dark; degradation; degradation process; dye; engineering; equation; figure; freundlich; graph; higher; highest; intensity; irradiation; isotherm; journal; lamp; langmuir; light; maximum; minutes; nanocomposite; percentage; photocatalyst; photocatalytic; photodegradation; process; procion; procion red; red; red dye; research; results; sem; study; suitable; sunlight; synthetic; synthetic zeolite; time; type; ultraviolet; value; zeolite; zeolite nanocomposite; zno
- versions: original; plain text
- ap-746
- author: Avanzini, G.; D’Angelo, S.; Matteis, G. de
- title: Design and Development of the Engine Unit for a Twin-Rotor Unmanned Aerial Vehicle
- date: 2005-01-04
- words: 4915
- flesch: 47
- summary: As for the last point, details will be given on the control system for engine rpm control currently being tested on the vehicle prototype. Nonetheless the iSTAR MAV is significantly different, inasmuch as it uses a ducted, constant pitch propeller for thrust generation, thrust modulation being achieved by engine rpm control, and con- trol moments being generated by vanes in the propeller wake.
- keywords: academic; acta; advanced; aerial; aerodynamic; aiaa; avanzini; blade; board; code; complex; components; computer; configuration; control; control system; czech; design; development; d’angelo; engine; fan; flight; flow; framework; fuselage; ground; hardware; high; house; http://ctn.cvut.cz/ap/; machine; main; matteis; model; modeling; necessary; order; output; paper; performance; phase; pitch; polytechnica; power; prague; present; proc; program; project; prototype; publishing; research; rotor; rotorcraft; rpm; separation; servos; shrouded; simulation; software; solid; speed; system; technical; technologies; testing; tools; uav; uninhabited; unit; university; vehicle; vol; vsaero; wake
- versions: original; plain text
- ap-748
- author: McGeoch, D. J.; McGookin, E. W.; Houston, S. S.
- title: Sliding Mode Implementation of an Attitude Command Flight Control System for a Helicopter in Hover
- date: 2005-01-04
- words: 5414
- flesch: 64
- summary: However when within the boundary layer, � �� BL, the out- put is equal to � �BL. T Tswitching cmd� � � � � �1 � �( ) sgn( ( ))� � � , (8) where, �( )f x represents the unmodelled dynamics.
- keywords: acta; ads-33; amplitude; attitude; bandwidth; change; cmd; command; control; controller; coupling; czech; decoupled; delay; design; dynamics; fig; flight; following; gain; handling; helicopter; high; input; large; level; linear; matrix; model; moderate; non; order; phase; pitch; polytechnica; rate; requirement; response; roll; rotor; rotorcraft; smc; switching; system; technical; term; university; vol; yaw
- versions: original; plain text
- ap-750
- author: Zanic, V.; Prebeg, P.
- title: Primary Response Assessment Method for Concept Design of Monotonous Thin-Walled Structures
- date: 2005-01-04
- words: 5851
- flesch: 67
- summary: x e x xxx e( , ) ( , ) ( ) ( ),� � � � � �w , and the total potential energy of the element, using the same shape functions as before, reads: � e e e e e l ex t G RS s x e � � � ! i e e e e Tc T c � � � � � ! ## � 2 and GI GI GIT To Tc� � .
- keywords: acta; beam; bending; box; calculation; concept; cross; czech; design; displacement; e e; e j; e l; e t; e u; e y; e �; element; energy; feasibility; fem; field; fig; g �; global; l l; l u; load; method; model; modules; normal; octopus; polytechnica; primary; program; response; s e; section; shear; ship; stiffness; strength; stress; stresses; strip; structural; technical; thin; torsion; total; transverse; u s; u u; university; vol; walled; warping; wing; xs e; z e; � xs; � xse
- versions: original; plain text
- ap-7515
- author: Dibyo, Sukmanto ; Luthfi, Wahid; Pinem, Surian; Irianto, Ign Djoko; Sriwardhani, Veronica Indriati
- title: CFD simulation of partial channel blockage on plate-type fuel of TRIGA-2000 conversion reactor core
- date: 2022-08-31
- words: 4005
- flesch: 62
- summary: Heat transfer analysis of plate type fuel element of reactor core. Channel blockage conditions can occur due to bending or swelling of fuel plates, caused by other material falling into the reactor pool, or debris carried by the coolant flow [10, 11].
- keywords: analysis; area; assembly; blockage; boiling; case; cfd; channel; code; conversion; coolant; coolod; core; design; element; figure; flow; fluent; fuel; heat; hydraulic; inlet; material; maximum; mtr; nuclear; partial; plate; profile; reactor; research; results; safety; shows; simulation; state; steady; study; sub; technology; temperature; thermal; triga-2000; type; type fuel; velocity
- versions: original; plain text
- ap-752
- author: Poul, R.; Hanus, D.
- title: Composite Axial Flow Propulsor for Small Aircraft
- date: 2005-01-04
- words: 2258
- flesch: 66
- summary: 4: Scheme of VARTM 4 Loads applied to rotor blades A rotor blade is loaded by a centrifugal force, resulting in a tensional force and a torsional moment acting in the blade axis direction, and by air pressure, which induces bending moments acting in the fan tangential and axial direction. Czech Technical University in Prague Fig. 10: Stress distribution in the first layer of the rotor blade: �x, �y, �xy Blade Glass/epoxy blade bottom Al-alloy modified dovetail lock Adhesive bonds Fig. 11: Rotor blade detail
- keywords: acta; air; analysis; axial; blade; calculation; carbon; composite; czech; design; distribution; epoxy; fan; fig; flow; house; http://ctn.cvut.cz/ap/; method; polytechnica; prague; pressure; properties; publishing; resin; rotor; skin; stator; technical; university; vane; velocity; vol; work
- versions: original; plain text
- ap-7523
- author: Nguyen, Danh Huy; Vu, Minh Le ; Trong , Hieu Do ; Nguyen, Danh Giang; Nguyen, Tung Lam
- title: Active disturbance rejection control-based anti-coupling method for conical magnetic bearings
- date: 2022-08-31
- words: 5109
- flesch: 66
- summary: Conical magnetic bearings with radial and thrust control. Fuzzy modeling and control for conical magnetic bearings using linear matrix inequality.
- keywords: acta; active; adrc; air; amb; angle; axes; axis; bearing; bias; centre; component; cone; conical; control; controller; coupling; current; design; disturbance; dynamic; effects; engineering; equations; equilibrium; figure; force; high; io1; io2; ki1; kq1; kq2; loop; magnetic; mass; model; motion; nguyen; observer; polytechnica; position; radial; rejection; rotational; rotor; simulation; sin; speed; structure; system; −ki2
- versions: original; plain text
- ap-754
- author: Kaňovský, P.; Smrcek, L.; Goodchild, C.
- title: Simulation of UAV Systems
- date: 2005-01-04
- words: 2375
- flesch: 53
- summary: This design method is also suitable for further utilisation in UAV design system simulation. The feature that distin- guishes the autopilot requirements of a UAV (Figs. 1, 7, 8) from the flight systems of conventional manned aircraft is the paradox of controlling a high bandwidth dynamical system using sensors that are in harmony with the low cost low weight objectives that UAV designs are often expected to achieve.
- keywords: acta; aircraft; airplane; altitude; automatic; autopilot; basic; coefficient; control; czech; data; design; engineering; equations; fig; flight; house; http://ctn.cvut.cz/ap/; low; main; mathematical; measurement; method; model; parameters; polytechnica; prague; pressure; publishing; quantities; results; sensor; simulation; simulink; sojka; speed; system; technical; time; uav; university; vertical; vol
- versions: original; plain text
- ap-756
- author: Dostál, M.; Zymák, J.; Valach, M.
- title: Physical and Numerical Difficulties in Computer Modelling of Pellet-Cladding Contact Problems for Burned-Up Fuel
- date: 2005-01-05
- words: 2452
- flesch: 57
- summary: The age of high- -speed computers has brought a qualitative change into the analysis of contact problems. 2 Mathematical description of the problem – unilateral contact Mathematical modelling of unilateral contact problems is a new area in applied mathematics.
- keywords: acta; analysis; behaviour; cladding; conditions; contact; cosmos; czech; element; femaxi; fig; finite; fuel; gap; heat; house; http://ctn.cvut.cz/ap/; linear; nuclear; outer; pellet; polytechnica; power; prague; problems; publishing; rod; stress; stresses; surface; technical; temperature; thermal; time; unilateral; university; values; vol
- versions: original; plain text
- ap-758
- author: Filipská, H.; Štamberg, K.
- title: Mathematical Modeling of a Cs(I) – Sr(II) – Bentonite – Magnetite Sorption System, Simulating the Processes Taking Place in a Deep Geological Repository
- date: 2005-01-05
- words: 6680
- flesch: 66
- summary: (69) Balance equation of total concentration of the edge sites, �SOH: � � � � � � � � � � � � �SOH SOH SOH SO SOSr (SO) (71) Balance equation of the total concentration of Sr(II) in the so- lution, [�Sr]solution, including the precipitate: � � � � � � � � � � � � �Sr Sr SrCO SrNO SrSO SrCO solution 2 3 3 4 3 � � � � � � �0 0 .
- keywords: acta; aqueous; b �; balance; bentonite; case; ccm; cem �; charge; concentration; constants; czech; data; e.g.; edge; equation; equilibrium; exchange; exp �; experimental; function; kdcal �; layer; magnetite; model; modeling; phase; prague �; processes; protonation; qls �; sites; soh2 �; solid; solution; sorption; srno; surface; technical; titration; total; types; university; vol; � c; � f([h; � f(ph; � h; � sr; � srco; � x; � �
- versions: original; plain text
- ap-7583
- author: Saad, Nasser
- title: On generalized Heun equation with some mathematical properties
- date: 2022-02-28
- words: 12593
- flesch: 82
- summary: − h − 1) + q1,h ] + q0,h (k + λ)[q2,0 (k + λ ξ+, |ξ−| < ξ+ a22 − 4a1a3 = 0 r = 0, ξ+ = ξ− = ξ r ∈ (0, ξ) Differential Equation: r (ξ1 − r)(ξ2 − r) y′′ + (β0 + β1 r + β2 r2)
- keywords: 0 r; 1)α1; 1)α2; 1/2022; 2f1; 2α1; = −; acta; case; ck−1; coefficients; condition; degree; differential; differential equation; equation; following; formula; generalized; heun; journal; k β1; k=0; linear; mathematical; n k; nasser; necessary; neighbourhood; order; orthogonal; physics; point; point r; polynomial; polytechnica; properties; r k; real; recurrence; regular; relation; roots; s +; saad; second; sequence; series; simple; singular; solutions; term; theorem; u =; u(r; vol; y(r; zeros; α1 r; α2 r; α2−4ε0; α2−β1)2−4α2ε0; α3 r; α3 α2; β0 α1; β1 r; β2 r; β2 α3; ε0;n; − √; √ −
- versions: original; plain text
- ap-7596
- author: Campoamor-Stursberg, Rutwig
- title: On some algebraic formulations within universal enveloping algebras related to superintegrability
- date: 2022-02-28
- words: 5406
- flesch: 55
- summary: The method of virtual copies, initially introduced in the context of invariant theory, provides an additional approach that combines ele- ments of the two algebraic formulations, and refers to a number of still open problems, such as the general solution of the embedding problem of Lie algebras into enveloping algebras [9]. In this work we comment on some purely alge- braic approaches formulated in the enveloping algebras of Lie algebras for the identification or construction of quadratic algebras that may lead to super-integrable systems, once a suitable realization of the enveloping algebra by first-order differential operators has been chosen.
- keywords: algebra; algebraic; basis; case; commutators; commute; construction; context; differential; dimensional; elements; enveloping; generators; hamiltonian; integrals; invariant; journal; kij; lie; lie algebras; mathematical; operators; order; physics; polynomials; problem; quadratic; realization; representation; semidirect; solvable; stursberg; subalgebra; superintegrable; systems; terms
- versions: original; plain text
- ap-760
- author: Baláži, P.
- title: Various Properties of Sturmian Words
- date: 2005-01-05
- words: 5797
- flesch: 72
- summary: We can compute the lengths between two consecutive points of ( )xn n Z� as � �x x n nn n� � � � � � � �1 1( )� � � � �. Then s s n� � � �, , ( )� , s s n� � � �, , ( )� are sequences defined by, � �s n n n� � � � � �, ( ): ( )� � � � �1 , for n � 0, � � � �s n n n� � � � � �, ( ): ( )� � � � �1 , for n � 0.
- keywords: alphabet; aperiodic; bidirectional; characterization; coding; cut; czech; exchange; fibonacci; infinite; integer; interval; invariant; irrational; length; map; math; mechanical; n n; nn �; number; palindromes; points; project; results; return; s �; sequence; set; sided; sturmian; sturmian words; substitution; theorem; university; vol; w w; words; � �
- versions: original; plain text
- ap-7611
- author: Kulshreshtha, Daya Shankar; Kulshreshtha, Usha
- title: On the Wess-Zumino Model: a supersymmetric field theory
- date: 2022-02-28
- words: 3447
- flesch: 70
- summary: Keywords: Wess-Zumino Model, supersymmetric field theories, Hamiltonian and path integral quantization. Supergravity theory on the other hand is a theory that has “local supersymmetry” and it is invariant under local Susy transformations where the transformation parameter depends on the spacetime xµ.
- keywords: constant; constraints; density; example; fermionic; field; free; global; iγ5; k0a; majorana; manifest; massless; model; non; physics; poincare; rigid; sft; spacetime; spinor; supergravity; supersymmetry; susy; theory; transformations; wess; wzm; zumino
- versions: original; plain text
- ap-7618
- author: Jeníková, Jitka; Michaliková, Kristýna; Hrdlička, František; Hrdlička, Jan; Pilař, Lukáš; Vodička, Matěj; Skopec, Pavel
- title: Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler
- date: 2022-06-30
- words: 6314
- flesch: 60
- summary: NOX emissions from bubbling fluidized bed combustion of lignite coal. Formation of NOX emissions There are three known mechanisms of nitrogen oxides formation in combustion processes [2–4]: • thermal NOX – oxidation of molecular nitrogen from the oxidant at high temperatures, known as the Zeldovich mechanism, • fuel NOX – oxidation of chemically bound nitrogen in solid fuels, 341 https://doi.org/10.14311/AP.2022.62.0341 https://creativecommons.org/licenses/by/4.0/ https://www.cvut.cz/en J. Jeníková, K. Michaliková, F. Hrdlička et al.
- keywords: acta; agent; air; ammonia; bat; bed; boiler; catalyst; catalytic; coal; combustion; concentrations; conversion; correlation; czech; denitrification; efficiency; emissions; energy; excess; experimental; figure; flue; fluidized; fluidized bed; formation; fuel; gas; higher; hrdlička; injection; lower; measures; method; mol; n2o; nh3; nitrogen; nm3; non; nox; nox reduction; nsr; oxides; oxy; polytechnica; primary; reaction; reduction; results; scr; scr method; secondary; section; selective; sncr; staging; table; technologies; temperature; vol; window
- versions: original; plain text
- ap-7619
- author: Vodička, Matěj; Michaliková, Kristýna; Hrdlička, Jan; Skopec, Pavel; Jeníková, Jitka
- title: Experimental verification of the impact of the air staging on the NOx production and on the temperature profile in a BFB
- date: 2022-06-30
- words: 6505
- flesch: 62
- summary: For coal combustion, no positive impact of staged injec- tion of combustion air was observed in the 30 kWth facility. NOX emissions from bubbling fluidized bed combustion of lignite coal.
- keywords: air; air ratio; air staging; bed; bed temperature; bfb; bfb facility; biomass; case; coal; combustion; concentration; conditions; dry; experiments; facility; figure; flue; flue gas; fluidization; fluidized; fluidized bed; formation; freeboard; fuel; gas; height; higher; impact; increase; injection; kwth; kwth bfb; kwth facility; lignite; minimum; nitrogen; nox; nox formation; particle; primary; primary air; profile; ratio; reduction; results; scale; secondary; secondary air; section; sncr; staging; s−1; table; temperature; volumetric; zone
- versions: original; plain text
- ap-762
- author: Ambrož, P.
- title: Non-Standard Numeration Systems
- date: 2005-01-05
- words: 3699
- flesch: 72
- summary: For given � find the value, or at least some good estimate, of the quantities L n x y x y x y n� �� � � � � � � � �( ): min{ | , , ( ) },� � �� �N Z ZFin L n x y xy xy n� �� � � � � � �( ): min{ | , , ( ) }� � �� �N Z ZFin . The first of them uses the so-called Meyer property of the set of �-integers for � Pisot number, namely that Z Z Z� � �� � � F where F is a finite set, and Z Z Z� � �� � G where G is a finite set.
- keywords: addition; algebraic; ambrož; base; beta; czech; finite; fractional; integer; number; pisot; property; real; root; sequence; set; systems; technical; theorem; university; vol; � -adic; � -expansions; � -numeration
- versions: original; plain text
- ap-7620
- author: Krempaský, Jakub; Havlík, Jan; Dlouhý, Tomáš
- title: Theoretical and experimental study of water vapour condensation with high content of non-condensable gas in a vertical tube
- date: 2022-06-30
- words: 5969
- flesch: 53
- summary: Experiments to determine the effect of NCG on water vapour condensation have been per- formed, so far, for an artificially prepared mixture of water vapour and air, also because of the availabil- ity of relevant literature references. [5] conducted an experimental and the- oretical study of water vapour condensation in the presence of air in a vertical tube.
- keywords: accuracy; air; analogy; calculated; coefficient; concentration; condensate; condensation; condenser; condensing; cooling; decreases; developed; effect; equation; experimental; figure; film; flow; gas; gases; heat; heat transfer; high; htc; inlet; inner; interface; layer; local; mass; mass transfer; measurements; mixture; model; molar; ncg; non; number; nusselt; outlet; overall; phase; power; presence; resistance; results; steam; study; temperature; theoretical; theoretical model; theory; transfer; tube; vapour; vapour condensation; vapour mixture; vertical; water; water vapour
- versions: original; plain text
- ap-7623
- author: Kulshreshtha, Usha; Kulshreshtha, Daya Shankar; Sihagb, Bheemraj
- title: Maxwell-Chern-Simons-Higgs theory
- date: 2022-02-28
- words: 3158
- flesch: 70
- summary: ∂2δ(x2 − y2) {E1(x0, x1, x2) , A1(x0, y1, y2)}D = {E1(x0, x1, x2) , A1(x0, y1, y2)}P = − δ(x1 − y1)δ(x2 − y2) (ieΠ) {E2(x0, x1, x2) , Φ(x0, y1, y2)}D = − ( κ 2 ) ∂1δ(x1 − y1)δ(x2 − y2) {E2(x0, x1, x2) , A2(x0, y1, y2)}D = {E2(x0, x1, x2) , A2(x0, y1, y2)}P = −δ(x1 − y1)δ(x2 − y2) (Π) {Φ(x0, x1, x2) , Φ∗(x0, y1, y2)}D = (−Φ∗)δ(x1 − y1)δ(x2 − y2) (Π) {Φ(x0, x1, x2) , A0(x0, y1, y2)}D = (Φ) δ(x1 − y1)δ(x2 − y2) (ieΠ) {Φ(x0, x1, x2) , A1(x0, y1, y2)}D = ∂1δ(x1 − y1)δ(x2 − y2) (ieΠ) {Φ(x0, x1, x2) , A2(x0, y1, y2)}D = δ(x1 − y1) Acta Polytechnica https://doi.org/10.14311/AP.2022.62.0085 Acta Polytechnica 62(1):85–89, 2022 © 2022
- keywords: 1)d; abelian; canonical; chern; conditions; constraints; density; field; fixing; formulation; fractional; gauge; gfc; hamiltonian; higgs; kulshreshtha; lagrangian; letters; matrix; maxwell; models; physical; physics; potential; quantum; review; scalar; set; simons; term; theories; theory; time; vector; y1)δ(x2; y2)}d; δ(x1; φ(x0
- versions: original; plain text
- ap-7630
- author: Švanda, Ondřej; Pollert, Jaroslav
- title: CFD modelling of a secondary settling tanks: generalization based on database relations
- date: 2022-04-30
- words: 5305
- flesch: 59
- summary: That significantly simplifies the preparation work to run a CFD simulation of the SST and more impor- tantly, it expands the usage of CFD settling model outside the batch test specific WWTP. Comparison of the sludge blanket in DN3 between CFD model (left) and experiment (right).
- keywords: account; acta; approach; blanket; cfd; cfd model; concentration; conditions; curve; data; database; developed; different; dry; equation; experimental; figure; flocculation; flow; function; height; hindered; index; inlet; interface; measured; model; modelling; new; numerical; order; outlet; parameters; phase; pollert; polytechnica; profile; properties; rain; rate; relations; results; rheology; sample; sampling; secondary; sedimentation; settleability; settling; sludge; solids; solids concentration; sst; strain; sub; svi; tank; test; time; velocity; viscosity; volume; water; zone
- versions: original; plain text
- ap-7633
- author: Hahn, Gabriela; Monteiro da Fonseca Thomé da Silva, Antônio Henrique; Tempel Stumpf, Felipe; Marcos Guilherme, Carlos Eduardo
- title: Evaluation of residual strength of polymeric yarns subjected to previous impact loads
- date: 2022-08-31
- words: 3939
- flesch: 57
- summary: BS EN 892:2012 brings different proce- dures depending on the investigated factors, such as stiffness, cycle number for impact load, transmitted force in the rope and maximum stretching. Results of the tensile tests for residual strength evaluation immediately after impact load – higher dead weights.
- keywords: abrupt; acta; axial; behaviour; break; conditions; damage; dead; deformation; different; evaluation; fibres; high; hmpe1; hours; impact; load; materials; mechanical; mooring; offshore; original; pet; polyester; polymeric; polytechnica; properties; reference; residual; results; ropes; samples; section; specific; strength; synthetic; table; tensile; tested; tests; tex; unexposed; weight; yarn; ybl
- versions: original; plain text
- ap-7638
- author: Patel, Niru C.; Patel, Jimit R.; Deheri, Gunamani M.
- title: A comparative study of ferrofluid lubrication on double-layer porous squeeze curved annular plates with slip velocity
- date: 2022-08-31
- words: 4458
- flesch: 59
- summary: And even lesser amount of studies has been done concerning the comparative studies on the performance of ferrofluid lubricated porous squeeze film in the multi-layered bearing sys- tem considering slip velocity. Magnetic fluid based squeeze film between porous annular curved plates with the effect of rotational inertia.
- keywords: annular; bearing; bhat; comparative; curved; deheri; double; effect; engineering; equation; exponential; ferrofluid; figure; film; hyperbolic; journal; kumar; layer; layered; lbc; load; lubrication; magnetic; model; non; parameter; patel; performance; plates; porosity; porous; profile; regards; rough; shah; shliomis; slip; squeeze; study; surface; system; tribology; variation; velocity
- versions: original; plain text
- ap-764
- author: Lavička, H.; Slanina, F.
- title: A Model of the Distribution of Wealth in Society
- date: 2005-01-05
- words: 3229
- flesch: 70
- summary: The second interesting variable is distribution of wealth D w P w w( ) ( )� � � . Edge e is a unor- dered pair e i j� ( , ) connecting nodes i and j. Each node i from i � � has its neighborhood � � �i j i j� � �{ |( , ) }.
- keywords: agents; average; case; connectivity; czech; distribution; edge; exponent; fig; interaction; law; model; network; parameters; pareto; phys; physica; power; prague; rev; scattering; simulations; social; society; solomon; tail; technical; tension; time; university; vol; wealth
- versions: original; plain text
- ap-7640
- author: Michaliková, Kristýna; Hrdlička, Jan; Vodička, Matěj; Skopec, Pavel; Jeníková, Jitka; Pilař, Lukáš
- title: Experimental verification of the efficiency of selective non-catalytic reduction in a bubbling fluidized bed combustor
- date: 2022-06-30
- words: 5669
- flesch: 60
- summary: Dependence of NOX reduction efficiency on temperature for different N SRs. Dependence of NOX reduction efficiency on N SR for different temperatures. 367 K. Michaliková, J. Hrdlička, M. Vodička et al.
- keywords: acta; air; ammonia; application; bed; bfb; biomass; case; catalytic; catalytic reduction; combustion; concentration; different; efficiency; emissions; experiments; figure; flow; flue; fluidized; fluidized bed; formation; freeboard; fuel; gas; injection; lignite; lower; measured; n2o; nitrogen; non; nox; nox reduction; oxides; primary; process; range; reagent; reduction; secondary; selective; sncr; solution; staging; temperature; urea; value; volumetric; wooden; zone; ° c
- versions: original; plain text
- ap-7652
- author: Natanson, Gregory
- title: Quantization of rationally deformed Morse potentials by Wronskian transforms of Romanovski-Bessel polynomials
- date: 2022-02-28
- words: 10436
- flesch: 68
- summary: − y ld∞Φ±,mp+1 (12) The Liouville transformations of the CSLEs with zero-energy free terms I0[ξ; a,b] and I0[ξ; a,b | ±, 0] then brings us to Gendenshtein’s conventional definition of a TSI potential [34] V [ξ; ⇀a,b | +, 0] = V [ξ; ⇀a + ⇀ 1 ,b] − E+1( ⇀ a,b) (13) or V [ξ; ⇀a,b | −, 0] = V [ξ; ⇀a − ⇀ 1 ,b] − E−1( ⇀ a,b) (14) depending on which basic solution ϕ+,0[ξ; ⇀ a,b] or ϕ−,0[ξ; ⇀ a,b] represents the lowest energy eigenfunction.
- keywords: acta; analysis; axis; bessel; bessel polynomials; conventional; corresponding; crum; csle; darboux; degree; eigenfunctions; end; energy; equation; equivalence; form; frobenius; generalized; group; i0[ξ; invariant; isospectral; journal; juxtaposed; laguerre; liouville; mathematical; morse; n(a; n2j; natanson; new; non; odake; orthogonal; pairs; partition; physics; point; polynomials; polytechnica; positive; potentials; prime; principal; problem; quantization; question; rational; rdct; rdt; relations; rsle; rss; sasaki; schrödinger; seed; set; shape; singular; solutions; solvable; sturm; terms; tfi; theorem; theory; transformations; tsi; type; use; vol; wronskians; zeros; | ±; | −; ∞w[y
- versions: original; plain text
- ap-7656
- author: Zhao, Hui ; Liu, Yu-Qiu ; Wang, Zhi-Xi ; Fei, Shao-Ming
- title: A note on entanglement classification for tripartite mixed states
- date: 2022-02-28
- words: 4040
- flesch: 76
- summary: For any quantum state ρ ∈ H21 ⊗ H22 ⊗ H33 , ρ has the principal basis representation: ρ = 1 12 (I2 ⊗ I2 ⊗ I3 + ∑ (i,j) ̸=(0,0) uij Aij ⊗ I2 ⊗ I3 + ∑ (k,l) ̸=(0,0) vklI2 ⊗ Akl ⊗ I3 + ∑ (s,t)̸=(0,0) wstI2 ⊗ I2 ⊗ Bst + ∑ (i,j),(k,l) ̸=(0,0) xij,klAij ⊗ Akl ⊗ I3 + ∑ (i,j),(s,t) ̸=(0,0) yij,stAij ⊗ I2 ⊗ Bst + ∑ (k,l),(s,t) ̸=(0,0) zkl,stI2 ⊗ Akl ⊗ Bst + ∑ (i,j),(k,l),(s,t) ̸=(0,0) rij,kl,stAij ⊗ Akl ⊗ Bst), (8) where I2 (I3) denotes the two (three) dimensional identity matrix, uij = tr(ρA † ij ⊗ I2 ⊗ I3), vkl = tr(ρI2 ⊗ A † kl ⊗ I3), wst = tr(ρI2 ⊗ I2 ⊗ B † st), xij,kl = tr(ρA†ij ⊗A † kl ⊗I3), yij,st = tr(ρA † ij ⊗I2 ⊗B † st), zkl,st = tr(ρI2 ⊗A † kl ⊗B † st) and rij,kl,st = tr(ρA † ij ⊗A † kl ⊗B † st). Taking into account the local unitary equivalence in H22 ⊗ H33 and using (9), we only need to consider that {|α⟩, |β⟩} = {|00⟩, |01⟩}.
- keywords: basis; bell; classification; criteria; dimensional; entanglement; h21; h22; h33; inequalities; matrices; mixed; multipartite; operators; physical; pi|φi⟩⟨φi|; principal; quantum; review; separable; states; systems; t0t1; theorem; tripartite; triqutrit; unitary; x̂ẑ2)j; ẑj; ̸=(0,0; λ2x̂ẑ)j; ∥tr;
- versions: original; plain text
- ap-7658
- author: Červený, Ondřej; Vybíral, Pavel; Hemerka, Jiří; Mareš, Luďek
- title: Measurement of solid particle emissions from oxy-fuel combustion of biomass in fluidized bed
- date: 2022-06-30
- words: 2447
- flesch: 58
- summary: Values of dilution ratio obtained using the given method and experimentally by measurement as a function of sample gas temperature. The presented work summarizes the results of the measurement of solid particle emissions from an experimental 30 kW combustion unit.
- keywords: acta; air; bed; biomass; capture; carbon; case; co2; combustion; composition; dilution; dilution ratio; dilutor; ejector; emissions; equation; experimental; figure; flow; flue; fluidized; fuel; gas; impactor; measurement; method; oxy; particle; polytechnica; rate; ratio; results; sample; solid; temperature
- versions: original; plain text
- ap-7659
- author: Reboiro, Marta; Ramírez, Romina; Fernández, Viviano
- title: Swanson Hamiltonian revisited through the complex scaling method
- date: 2022-02-28
- words: 4999
- flesch: 71
- summary: Journal of Physics A: Mathematical and General 35(31):L467–L471, 2002. https://doi.org/10.1088/0305-4470/35/31/101. Journal of Physics A: Mathematical and Theoretical 53(37):375302, 2020.
- keywords: complex; csm; different; effective; eigenfunctions; h(θ; hamiltonian; hermitian; iii; integrable; journal; mathematical; method; model; non; operators; physical; physics; plata; potential; quantum; real; region; space; spectrum; square; swanson; symmetry; systems; table; theoretical; u(θ; values; work; x)dx; ω−α−β
- versions: original; plain text
- ap-766
- author: Novotný, J.; Štefaňák, M.; Košt’ák, V.
- title: Multi-Particle Universal Processes
- date: 2005-01-05
- words: 4375
- flesch: 67
- summary: We will use the following notation A j Z j j j j j j D B j Z D N N N D N � � � � � � � � � � { | ( , , , ), } { | � � � � � 1 22 2 3 � � � � � j j j j j j D j N j N N� � � � � � � ( , , ), } { } ! sgn( ) ) 1 1 2 1 2 1 � �� �� jN PN ) , �� (10) where PN is a group of permutations of N elements. Consider a linear map � from 1 to N particles, i. e. � � � � �: ( ) ( ), ( ) ( ), ( ) ( ),� � � �in out in out Np p p p� � � � (1) where the density matrix �in ( )p has the form �in N N D I( ) ( ) ( )p p p� � � � �1 1 1 , (2) i.e. the first particle is in the pure state p , and all others are in the state of a complete mixture.
- keywords: anti; case; condition; czech; d n; density; entanglement; family; form; hilbert; j j; matrix; multi; n n; output; p n; parameter; particle; processes; quantum; scalar; space; states; symmetric; technical; terms; universal; university; vector; � �
- versions: original; plain text
- ap-7660
- author: Taira, Takanobu
- title: Complex topological soliton with real energy in particle physics
- date: 2022-02-28
- words: 7999
- flesch: 71
- summary: We note that the explicit forms of the similarity transformation will not be discussed in this paper as non-Hermitian and Hermitian theories are isospectral as long as the CPT symmetry is preserved for Hamiltonian, Higgs particles and monopole solution. Change in CPT symmetry and complex monopole solution We begin by introducing the useful quantities m21/g ≡ X, µ2/g ≡ Y, µ2/m22 ≡ Z.
- keywords: acta; ansatz; asymptotic; bps; breaking; classical; complex; conditions; cpt; different; differential; dotted; dyson; energy; equation; exceptional; field; figure; finite; fring; gauge; hamiltonian; hermitian; higgs; h±1; h±2; imaginary; limit; line; lower; m22; masses; matrix; mechanism; metric; millington; model; monopole; non; number; operator; parameter; particles; physical; physics; point; polytechnica; positive; quantum; real; region; review; scaling; section; soliton; solutions; symmetry; taira; term; theories; theory; topological; vacuum; value; ϕai
- versions: original; plain text
- ap-7668
- author: Escobar-Ruiz, Adrian M.; Montoya, Fidel
- title: Generalized three-body harmonic oscillator system: ground state
- date: 2022-02-28
- words: 4162
- flesch: 62
- summary: In a previous work [4], the most general quantum system of a three-body chain of harmonic oscillators, in Rd, was explored exhaustively. The classical analogue of the quantum Hamilto- nian operator (8) describes an effective non-relativistic 51 Adrian M. Escobar-Ruiz, Fidel Montoya Acta Polytechnica Figure 1. 3-body chain of harmonic oscillators.
- keywords: algebraic; arbitrary; body; case; classical; constants; coordinates; corresponding; dimensional; energy; equal; figure; generalized; ground; hamiltonian; harmonic; hidden; identical; masses; model; operator; oscillator; particles; physics; potential; problem; quantum; schrödinger; solutions; space; spring; state; system; variables; µ12; µ13; µ23; ν12; ν13; ρ12; ρ13; ρ23
- versions: original; plain text
- ap-7669
- author: Smilga, Andrei
- title: Modified Korteweg-de Vries equation as a system with benign ghosts
- date: 2022-02-28
- words: 4459
- flesch: 69
- summary: − ψ4x − ψxψt 2 (38) acquires the form LN = N∑ k=1 { [ψxx(kh,x)]2 − [ψx(kh,x)]4 2 − 1 2 ψx(kh,x) ψ[(k + 1)h,x] − ψ[(k − 1)h,x] 2h } , (39) where we impose the periodicity: ψ(0,x) ≡ ψ(Nh,x) and ψ[(N + 1)h,x] ≡ ψ(h,x).7 In recent [18], we outlined two wide classes of benign ghost systems: (i) the systems obtained by a varia- tion of ordinary systems and involving, compared to them, a double set of dynamic variables and (ii) the systems describing geodesic motion over Lorenzian manifolds.
- keywords: acta; ansatz; benign; blow; case; cauchy; classical; conditions; data; derivative; direction; discrete; dynamics; energy; equation; evolution; field; figure; form; functions; ghosts; hamiltonian; higher; initial; lagrangian; mkdv; motion; noise; numerical; ordinary; oscillator; particle; periodic; physical; physics; polytechnica; potential; problem; quantum; review; smilga; solution; spatial; system; time; u(t; uxxx; v(u; values
- versions: original; plain text
- ap-7670
- author: Seghman, Petr; Krátký, Lukáš; Jirout, Tomáš
- title: Effect of membrane separation process conditions on the recovery of syngas components
- date: 2022-06-30
- words: 4262
- flesch: 56
- summary: The presented study focuses on inspecting the dependency between process conditions, especially permeate and retentate pressure and component recovery of H2, CO, and CO2 during a membrane separation of model syngas. Keywords: Membrane separation, syngas improvement, components recovery, hollow fibre module.
- keywords: bar; barrer; biomass; co2; component; composition; concentration; conditions; cut; data; dependency; difference; feed; fibre; figure; flow; gas; hollow; ideal; measured; membrane; mixture; model; module; mol; molar; permeability; permeate; polyimide; pressure; process; pure; recovery; retentate; selectivity; separation; stage; study; syngas; s−1; temperature; total; unit; values
- versions: original; plain text
- ap-7671
- author: Turbiner, Alexander V.; del Valle, Juan Carlos
- title: From quartic anharmonic oscillator to double well potential
- date: 2022-02-28
- words: 1796
- flesch: 64
- summary: The ground state energy for (5) obtained variationally using the function (9) at p = 0 and compared with LMM results [7], where all printed digits (in the second line) are correct, E(0,0)var = 0.932 517 518 401 , E (0,0) mesh = 0.932 517 518 372 . The first excited state energy for (5) obtained varia- tionally using the function (9) at p = 1 and compared with LMM results [7], where all printed digits (in the second line) are correct, E(0,1)var = 3.396 279 329 936 , E (0,1) mesh = 3.396 279 329 887 .
- keywords: anharmonic; del; double; expansion; function; ground; note; oscillator; parameters; potential; quantum; quartic; results; semiclassical; single; small; state; turbiner; valle
- versions: original; plain text
- ap-7672
- author: Contreras-Astorga, Alonso; Fernández C., David J. ; Muro-Cabral, César
- title: Linearised coherent states for non-rational SUSY extensions of the harmonic oscillator
- date: 2022-02-28
- words: 4908
- flesch: 60
- summary: After the linearisation, we derive coherent states as eigenstates of the annigilation operator and analyse some relevant mathematical and physical properties, such as the completeness relation, mean-energy values, temporal stability, time evolution of the probability densities, and Wigner distributions. Keywords: Supersymmetric quantum mechanics, non-rational extensions, linearised ladder operators, coherent states.
- keywords: annihilation; behaviour; classical; coherent; coherent states; commutation; eigenfunctions; energy; equation; equivalent; evolution; extensions; factorization; fernández; figure; functions; general; hamiltonian; harmonic; heisenberg; hilbert; infinite; intertwining; journal; ladder; linearised; mathematical; mechanics; new; non; operators; order; oscillator; physics; potential; properties; quantum; rational; relation; schrödinger; second; seed; solutions; states; subspace; supersymmetric; susy; transformations; |zν
- versions: original; plain text
- ap-7673
- author: Castillo-Celeita, Miguel; Contreras-Astorga, Alonso ; Fernández C., David J.
- title: Photonic graphene under strain with position-dependent gain and loss
- date: 2022-02-28
- words: 4776
- flesch: 71
- summary: In this zone, there are only two inequivalent points, K± = (± 4π3√3a, 0). If we consider uniform strain in the lattices, which is represented by a strain tensor u = ( u11 0 0 u22 ) , (9) the Fermi velocity is modified in the following form vij = v0(1 + (1 − β)uij ).
- keywords: acta; approach; atoms; carbon; contreras; cosh(2κs; dependent; dirac; equation; fermi; fernández; fibers; field; figure; gain; gauge; graphene; hamiltonian; intertwining; journal; lattice; letters; loss; magnetic; matrix; mechanics; modes; n=1; new; operator; optical; photonic; photonic graphene; physical; physics; points; position; potential; quantum; review; second; solutions; strain; supersymmetric; susy; system; term; transformation; uniform; use; vectors; velocity; γ(s
- versions: original; plain text
- ap-7674
- author: Gutiérrez Altamirano, Izamar; Contreras-Astorga, Alonso ; Raya Montaño , Alfredo
- title: Time-dependent step-like potential with a freezable bound state in the continuum
- date: 2022-02-28
- words: 4418
- flesch: 70
- summary: but before we had A = 0, one can still have a Schrödinger equation without vector potential by tuning appropriately the scalar potential. Keywords: Bound states in the continuum, supersymmetric quantum mechanics, time-dependent quantum systems.
- keywords: acta; behavior; bic; confluent; continuum; dependent; energy; equation; figure; freezable; frozen; function; journal; like; mechanics; physical; physics; point; polytechnica; potential; probability; quantum; review; scattering; schrödinger; sin(ky; solutions; square; state; stationary; step; supersymmetric; susy; system; time; transformation; vector; wavefunction; ψ̄ϵ; ϕ(x
- versions: original; plain text
- ap-768
- author: Novotný, P.; Hrivnák, J.
- title: On Orbits of the Ring Zmn under Action of the Group SL(m, Zn)
- date: 2005-01-05
- words: 4890
- flesch: 81
- summary: From the definition of equivalence we have a b SL m a b a bpq~ ( , ), ( ( )� � � � � �A Z A G A) G , where � � � � G A) A) A) ) ) Therefore the stability subgroup of the point (0, …, 0, 1) is: S A A SL m SL m m m n: ( , )| ( , , , � � � � � � � � � � � � � � �A B Z B 1 2 0 0 1 1 � � Zn ) � � � � � � � � � � � � � � , and its order is S n pm m i j j m i r � �� � � � � � 2 1 2 1 1 1( ).
- keywords: action; arbitrary; czech; definition; element; equal; form; group; m m; m n; matrix; mod; number; orbit; orm; p m; prime; ring; set; sl(m; vol; |gcd; � sl; � �
- versions: original; plain text
- ap-7684
- author: Řeřicha, Petr
- title: A mindlin shell finite element for stone masonry bridges with backfill
- date: 2022-04-30
- words: 7771
- flesch: 70
- summary: Vx is the standard shear force in element local y − z plane when looking along x axis and Vy is the standard shear force in element local x − z plane when looking along y axis. The matrix ex- pression for vector R⃗ is in terms of g⃗ R⃗ = {g⃗, −g⃗} { Xbe Xbf } Recall that Xbe denotes the third element of the nodal forces matrix of element e at node i and the analogue holds for Xbf .
- keywords: acta; analysis; application; arch; arch bridges; arches; axis; backfill; beam; bed; bed joints; benchmark; bending; bridges; code; components; conditions; conjugate; constitutive; coordinate; cross; deflection; deformation; direction; displacement; dofs; elastic; element; element local; equations; equilibrium; face; failure; figure; finite; finite element; forces; functions; global; joints; linear; load; local; masonry; masonry arch; material; matrices; matrix; mesh; mindlin; models; nodal; node; normal; plane; rigid; rotations; section; shape; shear; shell; shell element; simple; solution; stiffness; stone; strain; stress; stresses; submatrices; system; tension; terms; timoshenko; translational; transverse; tt element; vector; vertices; x axis; xbf; x⃗f; y =; ∂sb; ∂st
- versions: original; plain text
- ap-7699
- author: Rachwał, Lesław
- title: How to understand the structure of beta functions in six-derivative Quantum Gravity?
- date: 2022-02-28
- words: 38766
- flesch: 55
- summary: Only in such conditions one can define general scattering problem in quantum gravitational theory. In general, the scattering processes are not every- thing we can talk about in quantum field theories even for on-shell quantities.
- keywords: 1/2022; acta; action; analysis; arguments; background; basis; beta; beta functions; box; case; classical; classical action; classical level; classical theory; coefficients; computation; compute; conformal; conformal gravity; conformal symmetry; consistent; constant; contributions; corresponding; cosmological; counterterms; counting; coupling; covariant; curvatures; d =; degenerate; dependence; derivative; derivative gravitational; derivative gravity; derivative model; derivative operator; derivative quantum; derivative terms; derivative theory; derivative uv; diagrams; different; differential; dimensions; divergent; dynamical; dynamics; effective; einstein; energy; example; expression; fact; feynman; field; field theory; final; final results; finite; fixing; flat; fluctuations; following; formula; functions; fundamental; gauge; gauge theory; general; generic; ghosts; good; gravitational; gravitational action; gravitational field; gravitational theory; graviton; gravity case; gravity model; gravity theory; green; gµν; hessian; higher; higher derivative; independent; interactions; invariant; issue; journal; kinetic; lagrangian; leading; lesław; level; like; limit; limiting; local; logarithm; loop; loop level; loop uv; main; matrix; matter; method; metric; minimal; model; modesto; n =; need; new; non; number; operator; order; original; parameters; partial; parts; perturbative; physical; physics; point; polytechnica; possible; power; prescription; present; problems; procedure; propagator; properties; proportional; pure; quadratic; quantum; quantum conformal; quantum field; quantum gravitational; quantum gravity; quantum level; quantum loop; quantum matter; quantum theory; rachwał; ratio; reduced; regime; related; remark; renormalizability; renormalizable; renormalizable theory; renormalization; results; review; ricci; scalar; scale; second; sector; shapiro; situation; solutions; spacetime; special; stability; standard; stelle; stelle theory; structure; subleading; super; symmetry; tensor; terms; theoretical; theories; theory; trace; type; unitarity; use; uv divergences; values; vol; way; weyl; x4−der
- versions: original; plain text
- ap-770
- author: Thinová, L.; Fronka, A.; Milka, D.
- title: Personal Dosimetry Enhancement for Underground Workplaces
- date: 2005-01-05
- words: 1968
- flesch: 42
- summary: With the aim of specifying the calculation of the real effective dose in caves, the following test measurements were carried out a few years ago: natural radioactive element content eval- uation in subsoils and in water inside/outside to study radon sources in the cave; continual radon measurements; regu- lar radon and daughters measurements using a sampling procedure to specify the proportion of radon daughters; regular indoor air flow measurements to study the location of the radon supply and its transfer among individual areas of the cave; 5-day aerosol particle-size spectrum measure- ments to determine the free fraction and to compare the aerosol spectra in an apartment and in a cave; comparative measurements using various radon and daughters monitors to study their behaviour in an area with high humidity (in- cluding Radim 4 – a device for simultaneous detection of radon concentration and concentration of unattached and at- tached fractions of its daughters); monitoring the behaviour of guides and visitors to record time spent in the cave, related to the continuously monitored levels of Rn concentration; some personal monitors for testing the detection of radon and its daughters. Keywords: radon concentration, underground, cave, effective dose, aerosol particles. b)a) Fig.
- keywords: aerosol; air; areas; calculation; cave; concentration; continual; czech; daughters; dose; effective; equilibrium; evaluation; factor; fig; flow; fraction; high; individual; measurements; prague; radon; results; sources; study; technical; time; unattached; underground; university
- versions: original; plain text
- ap-7718
- author: Zelaya, Kevin
- title: Time-dependent mass oscillators: constants of motion and semiclasical states
- date: 2022-02-28
- words: 7119
- flesch: 63
- summary: Thus, the semiclassi- cal states ξα(x,t) minimize the Schrödinger-Robertson relationship for t ∈ R. 4. + iη ) , (11) where A(x,t) is a local time-dependent complex-phase and [27] η(t) := m0 2ℏ γ(t)Wγ (t) σ(t) − 1 2ℏ ∫ t dt′ F(t′) µ(t′) , Wµ(t) = σ(t)µ̇(t) − σ̇(t)µ(t), Wγ (t) = σ(t)γ̇(t) − σ̇(t)γ(t), (12) with ḟ(t) ≡ df (t) dt a short-hand notation for the time derivative.
- keywords: a(x; acta; calculations; caldirola; case; coherent; complex; constants; corresponding; dependent; different; discussion; dynamics; eigensolutions; eigenvalue; equation; exact; figure; form; general; hamiltonian; hand; heisenberg; ĥck(t; ĥosc; initial; invariants; îa(t; journal; kanai; leads; m0w0; mass; mathematical; model; momentum; motion; new; non; nonstationary; oscillator; physical; physics; point; polytechnica; position; problem; p̂x; quantum; regularized; relationship; results; robertson; schrödinger; semiclassical; set; solutions; states; stationary; systems; term; time; transformations; uncertainty; w21; zelaya; µ(t; γ(t; ξα(x; σ(t; σ2(t; ψn(x
- versions: original; plain text
- ap-772
- author: Čechák, T.; Musílek, L.; Trojek, T.; Kopecká, I.
- title: Application of X-Ray Fluorescence Analysis in Investigations of Historical Monuments
- date: 2005-01-05
- words: 3061
- flesch: 57
- summary: I e I e � � � � � ( , ) 3 Analysis of fresco pigments The X-ray fluorescence equipment was built and is now operated in the Laboratory of Quantitative Methods in the Research of Ancient Monuments at FNSPE.
- keywords: 19th; absorption; analysis; atom; black; century; characteristic; coating; composition; czech; detector; elemental; elements; energy; excitation; fig; fluorescence; fresco; intensity; layer; measurements; methods; ochre; paintings; pigments; prague; process; radiation; ray; red; results; spectrometry; substrate; technical; thickness; university; vol; white; xrfa
- versions: original; plain text
- ap-7721
- author: Abed, Hadeel S.; Abdullah, Hikmat N.
- title: Improvement of spectrum sensing performance in cognitive radio using modified hybrid sensing method
- date: 2022-04-30
- words: 5363
- flesch: 49
- summary: Figure 4 presents the same performance as in Fig- ure 3, but in Rayleigh multipath fading, it can be noted that all techniques have the same detection performance as compared with Figure 3, but with a degradation in the probability of detection due to multipath fading, and the matched filter also outper- forms other technique in the case of a good knowledge of PU. 233 Hadeel S. Abed, Hikmat N. Abdullah Acta Polytechnica Figure 5. Pd versus Eb/No of proposed sensing methods under Rayleigh fading and non-cooperative scenario. Method Computational complexity Proposed method CT otalproposed = 4N − 2 + 3o ( N 2 log2 N 2 ) + o ( N 2 ) Hybrid method in [21] Chybrid = 2N + 2N − 2
- keywords: abdullah; acta; autocorrelation; cfd; channel; cognitive; complexity; computational; computational complexity; cooperative; cyclic; cyclostationary; detection; detector; energy; equation; fading; feature; figure; filter; frequency; good; hybrid; hybrid method; improvement; information; journal; low; matched; method; multipath; networks; noise; non; number; performance; polytechnica; probability; process; radio; received; results; samples; scenarios; sensing; signal; spectrum; stage; table; technique; threshold; traditional; wireless
- versions: original; plain text
- ap-7723
- author: Beneduci, Roberto; Frion, Emmanuel; Gazeau, Jean-Pierre
- title: Quantum description of angles in the plane
- date: 2022-02-28
- words: 5839
- flesch: 73
- summary: https://doi.org/10.1103/PhysRev.85.166. 15 https://doi.org/10.1080/00927879508825218 https://doi.org/10.1142/S0129055X19500132 https://doi.org/10.1007/BF01883517 https://doi.org/10.1007/s13538-019-00652-x https://arxiv.org/abs/2108.04086 https://doi.org/10.1016/S0034-4877(17)30035-6 https://doi.org/10.1007/978-88-7642-378-9 https://doi.org/10.1016/j.aop.2014.02.008 https://doi.org/10.1119/1.1933744 https://doi.org/10.1119/1.2386162 https://doi.org/10.1103/PhysicsPhysiqueFizika.1.195 https://doi.org/10.1103/PhysicsPhysiqueFizika.1.195 https://doi.org/10.1103/PhysRev.85.166 Acta Polytechnica 62(1):8–15, 2022 1 Introduction 2 Background 2.1 Definition of POVMs 2.2 Integral quantization 3 Euclidean plane as Hilbert space of quantum states 3.1 Mixed states as density matrices 3.2 Describing non-commutativity and finding Naimark extensions through rotations 3.3 Linear polarization of light as a quantum phenomenon 4 Entanglement and isomorphisms 4.1 Bell states and quantum correlations 4.2 Bell inequality and its violation 4.3 Entanglement of two angles 5 Conclusions Acknowledgements References A quantum measurement corresponds to an affine map S(H) 7→ M+(Ω) from quantum states to probability measures, ρ 7→ µρ.
- keywords: angles; basis; bell; case; classical; complex; cos; density; dimensional; entanglement; eϕ+π/2; function; half; hilbert; integral; light; linear; map; matrices; matrix; measurement; mixed; operator; p(ϕa; physics; plane; pointer; polarization; pure; quantization; quantum; real; rϕ0; set; sin; space; states; system; unit; vector; |0⟩; ∣∣∣π
- versions: original; plain text
- ap-7733
- author: Mandal, Bhabani Prasad
- title: Rational extension of many particle systems
- date: 2022-02-28
- words: 5820
- flesch: 64
- summary: QES many particle system In this section, we would like to discuss a rational extension of Calogero like many particle systems In this talk, we briefly review the rational extension of many particle systems, and is based on a couple of our recent works.
- keywords: acta; annals; approach; body; calogero; case; classical; eops; equation; exceptional; extended; extension; functions; hermitian; interaction; invariant; isospectral; jacobi; journal; khare; laguerre; letters; mandal; mathematical; model; new; non; orthogonal; oscillator; particle; physics; polynomials; polytechnica; potential; qes; quantum; quesne; radial; rational; section; solution; solvable; susyqm; systems; tcs; terms; theoretical; wave; yadav
- versions: original; plain text
- ap-7737
- author: Sabatini, Michel; Havlík, Jan; Dlouhý, Tomáš
- title: Analysis of parameters important for indirect drying of biomass fuel
- date: 2022-06-30
- words: 5190
- flesch: 53
- summary: Sensitivity analysis using penetration model for indirect drying of biomass The aim of the sensitivity analysis of the penetration model is to determine the effect of the change in the v of individual input parameters on its overall heat transfer coefficient and drying rate. The parameter was classified as significant if the change in the heat transfer coefficient or drying rate was greater than 3 % in the analysed range.
- keywords: analysis; bed; biomass; change; chemical; coefficient; conditions; constant; contact; content; coverage; diameter; dryer; drying; emissivity; energy; engineering; experiments; factor; fuel; gas; heat; heated; important; indirect; indirect drying; influence; material; model; moisture; operating; parameters; particle; penetration; period; pressure; process; processing; properties; rate; roughness; sensitivity; specific; speed; stirrer; surface; temperature; thermal; transfer; vacuum; wall
- versions: original; plain text
- ap-7738
- author: Agarwal, Kaustubh S.; Muldoon, Jacob ; Joglekar, Yogesh N.
- title: Conserved quantities in non-hermitian systems via vectorization method
- date: 2022-02-28
- words: 5321
- flesch: 59
- summary: Inspired by the Lindblad density matrix equation, our approach provides a useful addition to the well-established methods for characterizing time-invariants in non-Hermitian systems. Conserved quantities in non-Hermitian systems If λpq is real, we can choose them to be Hermitian, as in the case of a static Hamiltonian.
- keywords: -symmetric; approach; breaking; case; classical; complex; conserved; constant; corresponding; dimer; dotted; dynamics; eigenvalue; equation; evolution; expectation; f(t; figure; floquet; gain; h2(t; hamiltonian; hermitian; hpt; intertwining; joglekar; journal; letters; lindblad; loss; mathematical; matrix; nature; non; observation; operators; optical; parity; periodic; phase; physical; physics; problem; pt -symmetric; quantities; quantum; real; review; section; simple; single; state; static; symmetry; systems; time; unitary; values; η̂1; η̂2; ℜλt3
- versions: original; plain text
- ap-774
- author: Tippetts, J. R.; Tesař, V.
- title: Flow Visualisation by Condensing Steam – an Unusual Method Applied to Development of a Low Reynolds Number Fluidic Selector Valve
- date: 2005-01-06
- words: 8281
- flesch: 43
- summary: The task Present authors find flow visualization indispensable for their current development of no-moving-part fluidic devices, in particular flow control valves. Somewhat surprisingly, there does not seem to be any description of this method in authori- tative monographs (e.g. [3, 4]) on flow visualization methods.
- keywords: /addbleedmarks false; /allowpsxobjects false; /ascii85encodepages false; /asreaderspreads false; /autofiltercolorimages true; /bicubic; /compresspages true; /createjobticket false; /detectblends true; /downsamplegrayimages true; /embedallfonts true; /emitdscwarnings false; /encodemonoimages true; /lockdistillerparams false; /optimize true; /parsedsccomments true; /preserveopicomments true; /qfactor; /quality; /subsetfonts true; /tileheight; /tilewidth; /useprologue false; acrobat; adobe; air; condensation; control; czech; false; false /addregmarks; false /allowtransparency; false /autopositionepsfiles; false /convertcolors; false /cropcolorimages; false /cropgrayimages; false /cropimagestoframes; false /embedallfonts; false /endpage; false /generatestructure; false /includebookmarks; false /includeguidesgrids; false /includeinteractive; false /includelayers; false /includeprofiles; false /omitplacedeps; false /parseiccprofilesincomments; false /pdfxnotrimboxerror; false /preserveopicomments; fig; flow; jet; method; model; pdf; reader; sample; state; tesař; true; true /grayimageminresolution; true /parsedsccommentsfordocinfo; true /preservecopypage; true /preservedicmykvalues; true /preserveoverprintsettings; true /startpage; university; valve; visualization; water
- versions: original; plain text
- ap-776
- author: Tesař, V.
- title: Time-Mean Helicity Distribution in Turbulent Swirling Jets
- date: 2005-01-06
- words: 6877
- flesch: 52
- summary: The profile shape may be improved by a long nozzle exit channel, but this generates a thick boundary layer (degrading the outer parts of the profile) and the inevitable fast dissipation of the swirl decreases the achiev- able magnitude of nozzle exit helicity. 4.2 Similarity of helicity profiles in the jet The profiles of the time-mean helicity density were evalu- ated from the individual components of the velocity and vorticity vectors by computing the time-mean variant of the expression Eq.(1) � � � �w w w1 1 2 2 3 3� � � � (2)
- keywords: 6/2005; acta; adobe; angle; attack; axial; basic; case; character; chirality; components; computations; control; czech; czech technical; density; diameters; distance; downstream; edge; effect; energy; equation; evaluated; exit; experimental; fact; false; fig; flow; flowfield; fluid; generator; helical; helicity; helicity density; helicity profiles; house; http://ctn.cvut.cz/ap/; idea; important; inlet; investigations; jet; large; layer; local; magnitude; mean; mean helicity; model; momentum; negative; nozzle; nozzle exit; polytechnica; positive; prague; present; profiles; publishing; rate; relative; results; rotation; shape; similarity; small; structures; swirl; swirling; tangential; technical; technical university; tesař; time; true; turbulent; university; upstream; values; vanes; velocity; vol; vortex; vorticity; wall
- versions: original; plain text
- ap-778
- author: Abdelaziz, T. H. S.; Valášek, M.
- title: A Complete Parametric Solutions of Eigenstructure Assignment by State-Derivative Feedback for Linear Control Systems
- date: 2005-01-06
- words: 8420
- flesch: 68
- summary: i i ij k ij k ijf� � � � �Q Q P B11 12 1 1 0( ) ( ) ( )( ),� � � � 0 and � �w v w wijk i The closed-loop characteristic polynomial is given by � det ( )� � � ���I I BK
- keywords: assignment; b �; bkn �; bn �; closed; control; controllable; czech; derivative; eigenstructure; eigenvalues; eigenvectors; false; feedback; following; gain; generalized; ij ij; ij k; input; k k; k n; linear; loop; matrix; mi �; n ij; n n; parameter; parametric; pij; problem; rank; right; s �; set; solution; space �; state; system; technical; true; university; variable �; vectors �; vol; wv �; � c; � cn; � det; � f; � n; � qi; � rn; � v; � vij; � w; � �
- versions: original; plain text
- ap-780
- author: Dynda, V.
- title: Generic Platform for Failure Recovery in Survivable Trees
- date: 2005-01-06
- words: 6784
- flesch: 59
- summary: Graph S acts as an underlying network for a tree-topology overlay network modeled as graph T � (��, ��), where �� �� represents tree nodes, �� is a finite set of core tree edges representing overlay communication links connecting individual nodes ��. Consider T � (��, ��) to be an overlay tree network, �� ��� and �� T to be a connected vertex-induced subgraph of T. Failure of faulty cluster �� causes T to be partitioned into fragments Ti, i � 1, 2, …, N � card ( AT(��)), where card ( AT(��)) is cardinality of a neighbor set of �� in T.
- keywords: acta; algorithm; application; bypass; cluster; communication; cycle; czech; data; diameter; direction; dmax; election; failed; failure; failure recovery; fault; fig; fragments; grandfather; group; ieee; large; leader; link; methods; multicast; n j; n n; network; nodes; number; overlay; peer; platform; polytechnica; prague; properties; protection; reconnection; recovery; requirements; ring; root; routing; rt �; scale; scheme; single; size; source; specific; survivable; system; technical; tolerance; topology; traffic; tree; university; vol
- versions: original; plain text
- ap-782
- author: Večeř, P.; Kreidl, M.; Šmíd, R.
- title: Condition Indicators for Gearbox Condition Monitoring Systems
- date: 2005-01-06
- words: 5530
- flesch: 57
- summary: The ability of a selected condition indicator to describe the degree of gearing wear was tested using vibration signals ac- quired during durability testing of manual transmission with helical gears. Generally three type of signal are used: a raw, a residual and a difference signal.
- keywords: 6/2005; acoustic; acta; adobe; amplitude; analysis; cis; condition; crest; czech; damage; data; debris; detection; difference; distribution; emission; energy; factor; failure; false; fig; frequency; gearbox; gearing; good; house; http://ctn.cvut.cz/ap/; increases; indicators; kurtosis; level; mean; mesh; monitoring; na4; number; oil; order; parameter; peak; polytechnica; prague; publishing; residual; rms; sensitive; signal; square; systems; technical; test; time; tooth; trend; true; university; use; value; vibration; vibration signal; vol
- versions: original; plain text
- ap-784
- author: Ficker, T.
- title: On Deterministic Chaos in Microdischarge Phenomena
- date: 2005-01-06
- words: 3549
- flesch: 38
- summary: For example, the three-dimensional (d � 3) pseudo-vectors �(3) with the component interval �N � 2 can be written as follows � � � 1( ) ( ) ( ) 3 3 3 1 3 5 2 2 4 6 2 � � � � � � � � � U U U U U U U Un n n i j k d U U U U U ( ) ( ) ( ) ( ) ( ( ) � � � � � � � � � � � � 2 2 1 � � � � �U j d N� �( ) )
- keywords: /bicubic; /documentcmyk; /qfactor; /quality; /tileheight; /tilewidth; acrobat; adobe; chaos; correlation; czech; deterministic; documents; electrical; false; ficker; fig; high; iec61966; microdischarges; pdf; prepress; pulses; reader; series; srgb; system; technical; true; university; vol; voltage
- versions: original; plain text
- ap-786
- author: Čermáková, E.
- title: Magnetization of Steel Building Materials and Structures in the Natural Geomagnetic Field
- date: 2005-01-06
- words: 3813
- flesch: 56
- summary: What is called the effective magnetic moment mG is therefore established as a projection of the vector mtot into the direction of the opposite vector J, which is sufficient to describe the basic magnetic phenomena given by the rela- tionship between vectors mG and J. Vector J (and also mG) can take only discrete positions in the direction of the magnetic field (the projections JH of vec- tor J in the direction of field H are given as multiples of Planck’s constant � � h ( )2� , in the form J MH G� �; MG is the quantum number for the projection of the total moment of the atom momentum into the axis of quantization. (5) The geomagnetic field described above magnetizes ferro- magnetic materials (involving various alloy steels, cast iron, steel reinforcement of panels, various types of building steels) which become magnetized even by weak magnetic fields and keep this condition also after the external magnetic field has been removed.
- keywords: -5 -5; 6/2005; acta; adobe; atom; b/10; building; changes; crystal; czech; deformation; direction; external; false; ferromagnetic; field; fig; geomagnetic; geomagnetic field; hmr; house; http://ctn.cvut.cz/ap/; induction; magnetic; magnetometer; materials; meridian; moment; natural; output; pdf; polytechnica; prague; profile; publishing; skeleton; steel; technical; time; total; true; university; vector; vol
- versions: original; plain text
- ap-788
- author: Kubalík, P.; Kubátová, H.
- title: Parity Codes Used for On-Line Testing in FPGA
- date: 2005-01-06
- words: 5655
- flesch: 63
- summary: [12] we used format converting tools, parity circuit generator tools and simulation tools. FAIL (circuit N-1) Input Check bits (circuit N-1) Original combinational circuit Original combinational circuit Check bits generator Check bits generator 1 4 2 5 6 3 Fig. 8: Proposed structure of TSC circuits implemented in FPGA [8] Kubalík, P., Kubátová, H.: “Design of Self Checking Circuits Based on FPGA.”
- keywords: adobe; area; benchmarks; bits; cases; ced; checking; circuit; code; combinational; coverage; czech; design; detection; error; example; experiments; false; fault; fig; format; fpga; generator; hamming; input; level; line; logic; lut; matrix; memory; minimization; network; number; original; output; overhead; parity; parity bits; pla; primary; process; properties; property; redundancy; self; set; single; software; table; technical; test; time; tools; true; tsc; university; vector
- versions: original; plain text
- ap-790
- author: Mervart, L.; Čepek, A.
- title: Geoinformatics Study at the Czech Technical University in Prague
- date: 2005-01-06
- words: 3397
- flesch: 48
- summary: We believe that the new courses on geoinformatics, with an intensive focus on the theoretical background, will help us to attract more talented students, who will be able to collabo- rate on software projects of a scientific nature, as described above. However, our goal is also to open the new study branch to other fields, namely to geaduates of other bachelor programs at our faculty, e.g., Environmen- tal Engineering or the existing study branch Geodesy and Cartography Geoinformatics Geodesy and Cartography Geoinformatics � Environmental Engineering (or Water Engineering and Water Structures) System Engineering in the Building Industry (IT)
- keywords: 6/2005; acta; adobe; bachelor; bernese; branch; calculus; cartography; computer; courses; credits; czech; data; degree; development; earth; education; elective; engineering; false; fig; free; geodesy; geodetic; geoinformatics; gps; house; http://ctn.cvut.cz/ap/; information; institute; master; mathematical; network; new; pdf; polytechnica; prague; processing; program; project; publishing; real; science; seismic; sem; social; software; stations; students; study; system; table; technical; time; true; university; vol
- versions: original; plain text
- ap-7909
- author: da Cruz, Daniel Magalhães; Clain, Fernanda Mazuco; Guilherme, Carlos Eduardo Marcos
- title: Experimental study of the torsional effect for yarn break load test of polymeric multifilaments
- date: 2022-10-31
- words: 5544
- flesch: 60
- summary: Linear density test, Tex In the characterisation methodology of each of the multifilament materials In addition to optimal torsion values, this conclusion is paramount, the test procedure makes a general recommendation that does not optimise the breaking strength.
- keywords: acta; breaking; clain; data; density; effect; elongation; equation; experimental; figure; force; function; groups; guilherme; high; hmpe; increase; iso; linear; linear density; literature; load; materials; mathematical; maximum; mechanical; metre; model; modulus; mooring; multifilaments; offshore; optimal; point; polyamide; polyester; polyethylene; polymeric; polytechnica; recommendation; results; rio; rupture; square; standard; strength; study; table; test; tex; torsion; torsional; turns; twist; values; yarn; ybl
- versions: original; plain text
- ap-792
- author: Kuhlenkoetter, B.
- title: Development of a Robot System for Advanced High Quality Manufacturing Processes
- date: 2006-01-01
- words: 2278
- flesch: 38
- summary: In the course of the project presented here, a new genera- tion of robot systems is originating that can process sensory feedback to surface errors, and can establish and carry out experience-based optimum error compensation strategies. (Fig. 4) 4 Optimized automation through innovative robot systems
- keywords: acta; automation; complex; czech; development; error; fig; grinding; high; house; http://ctn.cvut.cz/ap/; industrial; manual; manufacturing; new; offline; operator; optimization; optimizing; polishing; polytechnica; prague; process; processes; processing; production; programming; project; quality; robot; software; surface; system; technical; university; use; vol; workpiece
- versions: original; plain text
- ap-794
- author: Mamtani, G.; Green, G.
- title: Reliability Risk Evaluation during the Conceptual Design Phase
- date: 2006-01-01
- words: 4048
- flesch: 58
- summary: Henceforth, 8 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 46 No. 1/2006 Czech Technical University in Prague Reliability Risk Evaluation during the Conceptual Design Phase G. Mamtani, G. Green Systematic evaluations of concept designs involve considering a range of criteria. Keywords: reliability, concept design.
- keywords: ahp; application; available; comparison; concept; conceptual; criteria; czech; decision; design; entropy; example; fig; function; functionality; hierarchy; main; matrix; method; phase; priorities; process; product; prt; r3i; relative; reliability; respect; seat; section; structure; table; technical; temperature; university; weights
- versions: original; plain text
- ap-7953
- author: Khrabustovskii , Andrii ; Znojil , Miloslav
- title: Analytic and Algebraic Methods in Physics
- date: 2022-02-28
- words: 1023
- flesch: 34
- summary: For all of these reasons, the organizers of the AAMP series came to the conclusion that one of the possible reactions to the unpleasant current circumstances would be an enrichment of the internet-mediated standard 1 https://creativecommons.org/licenses/by/4.0/ https://www.cvut.cz/en Andrii Khrabustovskii, Miloslav Znojil Acta Polytechnica form of the meetings (in which one listens to talks for a few days, without having a real opportunity of discussing the subjects in the couloirs) via a return to an apparently obsolete practice of a subsequent preparation and publication of at least some of the talks in their written, more lasting and better accessible form, better suitable for the subsequent critical re-evaluation. In comparison with the AAMP meeting itself (where the separate subjects covered by 36 talks have been subdivided into 12 sections), a minor disadvantage of our present SI lies, from the point of view of its readers at least, in the (traditional) alphabetical ordering of the contributions by their first authors.
- keywords: aamp; acta; acta polytechnica; algebraic; analytic; conferences; form; issue; meeting; methods; physics; polytechnica; readers; series; special; subjects; talks
- versions: original; plain text
- ap-796
- author: Rehák, B.
- title: Design of a Predictive Hierarchical Controller Using FEMLAB
- date: 2006-01-01
- words: 4663
- flesch: 70
- summary: The functions u, x, � that solve the minimization problem also satisfy the following set of equations on the interval (T, TH) (DxF, or DuF denotes the de- rivative of function F with respect to variable x or u.): � �� ( ), ( )x f x t u t� � � � �� ( ), ( ) ( ), ( ) ( )� �� �D j x t u t D f x t u t tx x � � � �0 � �D j x t u t The optimization problem P[T(k � 1)Tv, �((k � 1)Tv] is solved.
- keywords: barrier; boundary; control; controller; cost; czech; design; dynamic; equation; femlab; fig; following; function; hierarchical; interval; k �; level; lower; opt; opt opt; opt t; optimal; optimization; problem; solving; state; system; t t; t w; technical; time; trajectory; u t; u u; university; upper; � j
- versions: original; plain text
- ap-798
- author: Drahovzal, O.
- title: Company Value, Real Options and Financial Leverage
- date: 2006-01-01
- words: 1826
- flesch: 66
- summary: Free cash flow is given by the fol- lowing equation: FCF EBIT t AD INV� � � � �( )1 , (1) where EBIT is earnings before interest and taxes, t is tax rate, AD is the amount of amortization and depreciation, and INV is the value of the investments. X e N drt� � � � ��( ) ( )1 2 , (4) d S X r t t1 2 2 � � � � � � � � � � � � � � ln � � , (5) d d t2 1� � �� , (6) where S is the current price of the asset, X is the strike price of the asset, r is the risk-free interest rate, t is time to expiration of the option, N () is the standard normal cumulative distribu- tion function and � is the volatility of the price of the asset.
- keywords: a.s; capital; cash; company; czech; debt; debt ratio; dr �; equity; evaluation; financial; flow; formula; free; method; option; prague; ratio; technical; total; university; value; wacc
- versions: original; plain text
- ap-800
- author: Saafan, M. A. A.
- title: Shear Strengthening of Reinforced Concrete Beams Using GFRP Wraps
- date: 2006-01-01
- words: 6400
- flesch: 58
- summary: 3: Load-deflection curves for control beams with web rein- forcement 0 10 20 30 0 1 2 3 4 5 6 Midspan deflection (mm) C8 C10 C13 C8F C10F Fig. 4: Load-deflection curves for control beams with no web rein- forcement 0 10 20 30 40 0 2 4 6 8 10 Midspan deflection (mm) S8FP S8FU S8FR C8 Fig. 5: Load-deflection curves for shear strengthened beams 0 10 20 30 40 50 0 2 4 6 8 10 Midspan deflection (mm) S10FP S10FU S10FR C10 Fig. 6: Load-deflection curves for shear strengthened beams expected. A further increase in the cracking load was recorded in shear strengthened beams as the com- posite extended along the shear span (66 percent of the span) and thus the cracks were forced to occur along a limited por- tion of the beam.
- keywords: acta; beams; bond; bonding; capacity; composite; concrete; concrete beams; control; control beams; crack; curves; czech; debonding; deflection; design; different; fabric; failure; fiberglass; fig; flexural; flexure; frp; gfrp; group; house; http://ctn.cvut.cz/ap/; increase; layers; load; lower; mode; mpa; plates; polyester; polytechnica; ratio; reinforcement; repair; results; shear; shear capacity; shear reinforcement; shear strength; span; steel; strengthened; strengthening; stress; table; technical; tensile; tension; test; thickness; ultimate; university; vol; web; web reinforcement; wraps
- versions: original; plain text
- ap-802
- author: Pekař, J.; Štecha, J.
- title: Identification and Predictive Control by p-norm Minimization
- date: 2006-01-01
- words: 3876
- flesch: 73
- summary: y t u t u t� � �{ ( ), ( ), , ( ), ( ), }1 1� � leads to minimization of error vector � �� � �e t e t T( ), ( ),1 � . The previous problem is weighted Least Squares: min ( ) ( ) , ( ) ( ) x D b Ax D� � � p� � � 2 2 2 diag .
- keywords: control; criterion; czech; fig; identification; input; linear; minimization; model; norm; output; predictive; problem; programming; quadratic; results; squares; system; t t; technical; time; u t; university; vector; vol; y t; � �
- versions: original; plain text
- ap-804
- author: Tesař, V.
- title: Similarity Solutions of Jet Development Mixing Layers Using Algebraic and 1-Equation Turbulence Models
- date: 2006-01-01
- words: 11377
- flesch: 56
- summary: (34) Unfortunately, the only points at which all five values f, u, g, , n are known are the two extremes at the theoretical boundaries �1EQ � � � and �1EQ � � �. 15: Solutions for the dimensionless velocity u obtained by nu- merical integration of the set of equations d df u� � , d du g� � , and d dg f� � � in the direction of the positive transversal similarity co-ordinate �ALG .
- keywords: 1eq �; acta; algebraic; axial; boundary; case; central; character; comparison; conditions; constant; curvature; czech; d d; data; definition; different; dissipation; distance; downstream; energy; eqs; equation; equilibrium; experimental; fact; fig; flows; fluctuation; g �; gradient; görtler; house; http://ctn.cvut.cz/ap/; integration; jet; jets; k s; layer; local; mean; mixing; mixing layer; model; momentum; negative �; nozzle; ordinate; outer; point; polytechnica; prague; prandtl; present; problem; production; profiles; publishing; rate; relative; results; scale; shear; similarity; similarity solution; small; solution; starting; streamwise; submerged; technical; terms; tesař; thickness �; time; transformation; transformed; transport; transversal; turbulence; university; useful; values; velocity; vol; w k; � alg; � �
- versions: original; plain text
- ap-806
- author: Bokr, J.; Jáneš, V.
- title: Logical Structural Models with Multiplexors
- date: 2006-01-01
- words: 2364
- flesch: 73
- summary: hence 58 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 46 No. 1/2006 Czech Technical University in Prague Fig. 2: Multiplexor and the element of the sum modulo 2 – M2 Fig. 3: Decomposition maps of the function from Example 2 y � � � � � � � x x x x x x x x x x x x x x x x 1 2 3 1 2 3 4 5 1 2 3 4 1 2 3 1 0 0 ( ) ( ) ( ) ( ) x x x x x x x x x x x x x x x x x 2 3 4 5 1 2 3 4 5 1 2 3 4 1 2 3 4 ( ) ( ) ( ) ( ) � � � � � as well as y � � � � � � � � x x x x x x x x x x x x x x x x x 4 5 4 5 2 3 4 5 1 2 2 3 2 3 4 5 0( ) ( ) ( ) ( 1 2 3 2 3� �x x x x ). If one cannot decide whether to construct f (X) or f X( ), then if w f X w f XH H m m m m( ) ( ), , , , , ,� � � � � �1 2 1 22 2 2 2� � or w f X w f XH H m m m m( ) ( ), , , , , ,� � � � � �1 2 1 22 2 2 2� � � then z x� 1 and y � � � �x f x x f x1 1 1 10 1( ) ( ) or z x� 1 and y � � � �x f x x f x1 1 1 10 1( ) ( ) respectively.
- keywords: arguments; czech; decomposition; fig; function; multiplexor; structural; university; y �; � �
- versions: original; plain text
- ap-808
- author: Bokr, J.; Jáneš, V.
- title: State of a Logical Object
- date: 2006-01-01
- words: 4945
- flesch: 66
- summary: ( / ) : , { } [{ }] {[ X X X x x x x x x x N N� � � � � � � � � ] }x .� We have still to define the right-side congruence Nerode equivalence � on X N; the input words x x xi i i 0 1 � � and x x xj j j 0 1 � � (i j� ) are said to be right-side congruent, if there holds � � �� �2 0 1 2 0 1( ) ( ){ }, { },e x x x e x x xi i i j j j� �� � � � � � �2 0 1 1 2( ){ },e x x x x x xi i i� �� � � � � �� � � � �2 0 1 1 2( ){ },e x x x x x xj j j� � For the transition function �2 there is (i j� ): � { } { }x x x x x xi i i j j j 0 1 1 0 1 1 � � � �� �� � � �� �{ } { }x x x x x x x xi i i j j j 0 1 1 0 1 1 � � � � � � � { } { }x x x x x xi i i j j j 0 1 1 0 1 1 � � � �� �� � � � � � �{ } { }x x x x x x x xi i i j j j 0 1 1 0 1 1 � � � � � � where � � means either = or � , � { , } { }a x e� � is legitimate. The response y� is a value of the output function: � � � � � � �: : ,{ } { } { }[ ] [ ]H X Y h x y� � � of an output block O of the object, where h� is the instanta- neous input prehistory.
- keywords: automaton; circuit; czech; delay; fig; follower; function; initial; input; j j; logical; model; moment �; nondeterministic; object; output; s s; s x; s �; state; state s; stimulus; table; technical; transition; university; word; x n; y �; � t
- versions: original; plain text
- ap-810
- author: Soliman, H. F.; Attia, A.-F.; Hellal, M.; Badr, M. A. L.
- title: Power System Stabilizer Driven by an Adaptive Fuzzy Set for Better Dynamic Performance
- date: 2006-01-02
- words: 4063
- flesch: 67
- summary: The differential equations that describe the system under study are as follows: � � � � � � � � � � � � � � � � �T D K K e M m q1 2 (1) � �� � �� � �b (2) � � � � � � � � � � � � � � e E K T e T Kq FD do q do 4 3 � (3) � � � � � � � � � � � � � � � � � � Where a b c dj i j i j i j i( ) ( ) ( ) ( ), , , � � and a b c dj i j i j i j i( ) ( ) ( ) ( )� � � .
- keywords: acta; adaptation; adaptive; afs; controller; czech; dynamic; ffs; fig; flc; fuzzy; house; http://ctn.cvut.cz/ap/; input; lines; linguistic; logic; membership; mfs; output; parameters; polytechnica; power; proposed; pss; results; rules; set; sets; simulation; speed; system; table; technical; time; university; variables; vol
- versions: original; plain text
- ap-812
- author: Attia, A.-F.; Soliman, H.; Sabry, M.
- title: Genetic Algorithm Based Control System Design of a Self-Excited Induction Generator
- date: 2006-01-02
- words: 4766
- flesch: 59
- summary: 3.1 PI-Controller with a variable gain A program has been developed to compute the value of the variable integral gain KIV using the following rule: if e e K K elseif e e K K V V IV IV V V IV IV ( ), ; ( ), min min max ma � � � � x min max max min max m ; ( ), ( ) ( else e e e M K K e e V V V IV IV V V � � � � � in min min ); ; ( ) ; C K M e K M e C en d IV V IV V � � � � � � where eV is the voltage error, eVmin and eVmax are the mini- mum and maximum values of the voltage error, respectively, KIVmin and KIVmax are the minimum and maximum values of the variable integral gain, respectively, C is a constant and M is the slop constant of the linear part. d d � � � qs b qs s qs dst V R i� � � �( ), (12) where: �b is the base speed.
- keywords: acta; algorithm; angle; axis; bank; capacitor; chromosome; circuit; controller; current; cycle; czech; duty; dynamic; equation; equivalent; fig; frequency; gains; generator; genetic; house; http://ctn.cvut.cz/ap/; induction; integral; kiv; load; parameters; performance; pi controller; pitch; polytechnica; power; prague; publishing; reactive; results; rotor; seig; simulation; speed; stator; study; switching; system; technical; terminal; time; turbine; university; value; variable; voltage; wind
- versions: original; plain text
- ap-814
- author: Brož, P.
- title: Some Effects on Fatigue Strength
- date: 2006-01-02
- words: 4721
- flesch: 52
- summary: Only biaxial stress systems need be considered in the case of those materials in which cracks are initiated at a free surface and the three failure criteria most commonly used (that is, maximum principal stress, maximum shear stress, and the maximum shear – strain energy or von Mises) may be expressed by the formulae: maximum principal stress � �� � � � � �e x y x y xy� � � � � 2 1 2 42 2 1 2( ) , (5a) maximum shear stress � �� � � �e x y xy� � �( )2 2 1 24 , (5b) von Mises � �� � � � � �e 2; they can be expressed in the form � � � � � � � � � � � � �� � � � �� � � � c m m n R 1 , (2)
- keywords: bending; combined; compressive; criterion; czech; data; fatigue; fatigue limit; fig; goodman; limit; line; loading; material; maximum; mean; mean stress; mises; modified; mpa; phase; ratio; shear; steel; strength; stress; stresses; surface; technical; tensile; torsion; torsional; uniaxial; university; value; von; � �
- versions: original; plain text
- ap-8157
- author: Klesa, Jan
- title: Determination of fan design parameters for light-sport aircraft
- date: 2022-10-31
- words: 3955
- flesch: 65
- summary: 5/2022 Determination of fan design parameters for light-sport aircraft where ζ01 = 0.1 (based on CFD simulations from [10]). 5/2022 Determination of fan design parameters for light-sport aircraft Figure 4.
- keywords: aircraft; axial; constant; contraction; cross; density; dependence; design; determined; diameter; different; duct; efficiency; electric; fan; fan design; fan diameter; figure; flight; flight speed; flow; high; h−1; model; nozzle; nozzle contraction; parameters; point; power; pressure; propulsion; ratio; ratio a1; red; results; rpm; speed; sport; static; system; s−1; temperature; thrust; total; ul-39; velocity; κ−1
- versions: original; plain text
- ap-816
- author: Pecherková, P.; Nagy, I.
- title: Mixture Based Outlier Filtration
- date: 2006-01-02
- words: 3773
- flesch: 60
- summary: 5 Conclusions A new type of filter detecting outliers and data recon- struction has been described and demonstrated on a serial of examples. If the chosen component is that of the outliers, � generate data prediction using the data component, � use the predicted value as a reconstruction of the observed data, � use the predicted value in the (future) regression vector of the data component, � re-evaluate parameter statistics for the outlier com- ponent only.
- keywords: acta; algorithm; bayesian; big; blocks; component; control; czech; data; data component; detection; estimation; experiments; filter; kárný; mixture; model; modelling; nagy; observed; outliers; parameters; polytechnica; prague; prior; process; processing; regression; results; standard; statistics; table; technical; time; uncorrupted; university; value; vol; weight
- versions: original; plain text
- ap-8177
- author: Zehawi, Raquim N.; Kareem, Yassir A.; Khudhair, Emad Y.
- title: Reduction of pavement thickness using a subgrade layer treated by different techniques
- date: 2022-10-31
- words: 4974
- flesch: 61
- summary: Such cases often result from the sen- sitivity to a high-water content, low specific gravity, and low shear strength, along with many undesirable characteristics of highway pavement subgrade soils. The process of stabilising subgrade soil is both efficient and cost effective in most cases, because road paving materials are generally less expensive than replacing the existing subgrade with stronger materials [2].
- keywords: aashto; acta; addition; additives; afa; ash; cbr; chemical; concrete; cost; crumb; design; diyala; effect; engineering; financial; flexible; fly; gravity; grc; highway; increase; journal; layer; lime; low; materials; method; pavement; pavement thickness; percentage; plasticity; polytechnica; process; properties; ratio; recycled; reduction; research; results; road; rubber; samples; soft; soil; specific; stabilisation; strength; study; subgrade; table; test; thickness; type; use; value; waste; water
- versions: original; plain text
- ap-818
- author: Dočekal, A.; Kreidl, M.; Šmíd, R.
- title: System for 3D Visualization of Flaws for Eddy Current Inspection
- date: 2006-01-02
- words: 2677
- flesch: 62
- summary: A matrix formed of EC signal values resulted from the data acquisition process, see Fig. (8) This result requires calibration especially due to the non- -linear principle of EC inspection.
- keywords: angle; bevel; current; czech; data; depth; eddy; fig; flaw; fourier; inspection; method; position; prague; probe; processing; sample; scanning; signal; signature; size; surface; system; technical; university; vector; visualization; vol
- versions: original; plain text
- ap-820
- author: Kalvoda, L.; Aubrecht, J.; Klepáček, R.
- title: Fiber Optic Detection of Ammonia Gas
- date: 2006-01-02
- words: 4975
- flesch: 55
- summary: Central ion (Me2�) Counter-ion � � (nm), L1 � � (nm), L2 Fe2� (Br�)2 96 76 Co2� (Br�)2 105 82 Ni2� (Cl �)2 108 70 Cu2� (Cl �)2 125 70 Cu2� SO4 2� 129 70 Zn2� SO4 2� 81 69 Hg2� (NO3 �)2 106 80 Pb2� (NO3 �)2 98 68 Table 1: Bathochromic shifts � � resulting from creation of com- plex ions [L-Me-L]2�. In the research stage described here, the following objectives were adopted: (i) to choose reagent(s) suitable for further studies on optical fibres by evaluating the optical absorption spectra of two suitable organic dyes and their metallic com- plexes in solution, (ii) to prepare sensing fibre samples by diffusion of the reagent into a plastic clad silica (PCS) fibre cladding using the frequently applied procedure elaborated by our research group in frame of the CEC Copernicus programme [13, 9, 14], (iii) to test the concentration and temporal response to ammonia gas exposure by VIS-NIR absorption spectroscopy measurements on short fibre sec- tions, and (iv) to pre-evaluate the qualitative features of an OTDR signal by measurements on a longer fibre, only partially sensitized with the selected reagent.
- keywords: absorption; acta; ammonia; chemical; cladding; complex; complexes; concentration; curve; czech; detection; dye; ethanol; exposure; fibre; fig; gas; house; http://ctn.cvut.cz/ap/; intensity; interval; length; level; ligand; light; local; long; measurements; metallic; nir; nitrogen; observed; optical; otdr; polymer; polytechnica; ppm; prague; prepared; publishing; pulse; range; reaction; reagent; reflection; reflectometry; region; resolution; sections; sensing; sensitization; sensitized; sensors; short; signal; so4; spectra; spectroscopy; system; technical; time; university; vol
- versions: original; plain text
- ap-822
- author: Šimeček, I.
- title: A Simple Cache Emulator for Evaluating Cache Behavior for SMP Systems
- date: 2006-01-02
- words: 1639
- flesch: 67
- summary: The Cache Emulator (CE) can simulate the behavior of caches inside an SMP system and compute the number of cache misses during a computation. No. 2/2006 A Simple Cache Emulator for Evaluating Cache Behavior for SMP Systems I. Šimeček Every modern CPU uses a complex memory hierarchy, which consists of multiple cache memory levels.
- keywords: behavior; bus; cache; code; coherence; cpu; czech; data; emulator; example; memory; misses; number; operations; program; smp; software; system; technical; university; user; write
- versions: original; plain text
- ap-826
- author: Šimeček, I.
- title: Performance Aspects of Sparse Matrix-Vector Multiplication
- date: 2006-01-03
- words: 2487
- flesch: 65
- summary: Loop unrolling-and-jam applied to the example code (Uf � 2) s1 � 0.0; s2 � 0.0; for i � 1 to n step 2 do s1 � s1 � A[i]; s2 � s2 � A[i+1]; s � s1 � s2; 1.2.3 Software pipelining The initial instruction(s) of the first iteration is/are moved into the prologue phase, and the final instruction(s) of the last iteration is/are moved into the epilogue phase. 4 Results Evaluation of the results: � Using structures ( SpM×V_(a) )
- keywords: acta; array; cache; code; csr; czech; data; elements; fig; format; house; http://ctn.cvut.cz/ap/; instruction; loop; matrix; modification; multiplication; nonzero; performance; polytechnica; prague; publishing; rows; software; sparse; spm×v; technical; university; unrolling; vector; vol
- versions: original; plain text
- ap-828
- author: Robbe, M.-F.
- title: A Porosity Method to Describe Complex 3D-Structures Theory and Application to an Explosion
- date: 2006-01-03
- words: 12282
- flesch: 71
- summary: I grad v grad v� � � � � � pressure ��� � � �2 3 ( ) � � � viscous stresses � �������� �������� where p is pressure, I the unit tensor, and the dynamic viscosity. The average values � and � are linked by: � � � �.
- keywords: acta; area; argon; baffle; bubble; ccp; central; channel; closure; code; components; conf; control; core; css; cylinder; czech; czech technical; diagrid; div; external; f f; f t; fig; flows; fluid; gas; grad; heat; house; http://ctn.cvut.cz/ap/; intermediate; internal; internal vessel; joining; lepareux; lower; main; main vessel; mara; mars; mass; mechanics; method; mock; model; mpa; neutron; nuclear; panache; plates; plug; polytechnica; porosity; porous; prague; pressure; proc; publishing; reactor; robbe; roof; shell; shielding; simulation; stresses; structures; support; technical; technical university; university; upper; v v; vessel; vol; volume; water; wave; whirlpool; zone; � �
- versions: original; plain text
- ap-830
- author: Brož, P.
- title: Metal Fatigue Features
- date: 2006-01-03
- words: 5758
- flesch: 60
- summary: On a microscopic scale, fatigue crack growth is often an ir- regular process. 5: Various periods of fatigue life and applicable considerations In conjunction with the well-known Paris equation, it has to be recognized that fatigue crack growth is subject to physi- cal laws.
- keywords: acta; alloys; crack; crack growth; cycle; cyclic; czech; data; design; different; electron; environment; expected; factor; failure; fatigue; fatigue crack; fig; fracture; free; grains; growth; high; house; http://ctn.cvut.cz/ap/; initiation; large; length; life; limit; lips; load; low; material; mechanics; metal; microcracks; microscope; mild; mode; period; polytechnica; prague; problem; propagation; publishing; rate; shear; slip; small; specimen; steel; strength; stress; striations; structure; surface; technical; tensile; test; tip; university; value; vol; � k
- versions: original; plain text
- ap-8300
- author: Can, Erol
- title: Extra control coefficient additive ECCA-PID for control optimization of electrical and mechanic system
- date: 2022-10-31
- words: 4184
- flesch: 69
- summary: The equation of the second order and PID system is given in Equation (22). 2. Design with PID controller Although the PD control from three controllers brings attenuation to the system, it does not affect the steady state behaviour of the system.
- keywords: coefficient; control; control system; controller; decision; ecca; error; extra; figure; gain; method; moment; order; oscillation; output; pid; pid control; process; reference; response; rise; settling; signal; step; system; time; traditional; unit; values
- versions: original; plain text
- ap-832
- author: Rieger, F.
- title: Determination of Rheological Parameters from Measurements on a Viscometer with Coaxial Cylinders
- date: 2006-01-03
- words: 3681
- flesch: 64
- summary: 2.2 Bingham plastics The simplest model for viscoplastic behavior is the Bing- ham model �� � 0 for � �� 0 (10 a) � � � � �� � � � � � � p 0 � � for � �� 0, (10 b) where �p is plastic viscosity and �0 stands for yield stress. Czech Technical University in Prague 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.2 0.4 0.6 0.8 1 y* * � � � 0 � � � 0.1 � � � 1 Fig. 4: Dependence ��* on y* for � � 0.5 and selected values �* (�c* � 1.24) 0 2 4 6 8 10 12 14 16 18 0 0.2 0.4 0.6 0.8 1 y* � � � 0 * � � � 5 � � � 50 Fig. 5: Dependence � *� on y* for � � 0.9 and selected values �* (�c* � 83.9)
- keywords: behavior; czech; dependence; fig; flow; index; k n; n n; radius; rate; ratio; shear; technical; university; values; � k; � �
- versions: original; plain text
- ap-834
- author: Lidmila, M.; Horníček, L.; Krejčiříková, H.; Tyc, P.
- title: Problems in Different Measuring and Assessment the Modulus of Deformation Using the Czech and German Methodologies
- date: 2006-01-03
- words: 3113
- flesch: 51
- summary: The value of the total mean plate insertion from the loading branch of the second cycle is en- tered in the chart with a simultaneous calculation of the modulus of deformation using general formula: E p r y � � 1 5. , where E is static modulus of deformation It is determined from the loading chart, from the inclination of the secant line between two points given by the value of the 0.3- and 0.7-multiple of the maximum load, using the general formula: E r sv � � �15. � � � , where Ev is static modulus of deformation [MPa], r load plate radius, i.e. 0.15
- keywords: 15sd; box; correlation; czech; deformation; determined; e10; experimental; field; granulated; gravel; layer; load; loading; mean; measurements; methodology; model; moduli; modulus; mpa; plate; plate load; sand; static; table
- versions: original; plain text
- ap-8348
- author: Khantoul, Boubakeur; Bounames, Abdelhafid
- title: Exact solutions for time-dependent complex symmetric potential well
- date: 2023-05-02
- words: 4621
- flesch: 67
- summary: The pseudo Hermitian invariant operator and time-dependent non-Hermitian Hamiltonian exhibiting a SU(1,1) and SU(2) dynamical symmetry. Introduction The discovery of a class of non-Hermitian Hamilto- nian that may have a real spectrum has prompted a revival of theoretical and applied research in quan- tum physics.
- keywords: acta; airy; complex; dependent; eigenvalues; equation; exact; exp; function; g(t; h(t; hamiltonian; hermitian; hermitian hamiltonian; hermitian invariant; hermiticity; ih(t; invariant; journal; maamache; mass; mathematical; method; non; operator; particle; physical; physics; polytechnica; potential; probability; pseudo; quantum; real; region; review; s(t; schrödinger; solutions; symmetric; symmetry; systems; t)⟩; time; transformations; unitary; w(t; |ϕn; ∣∣ψhn(t; ∣∣ϕphn
- versions: original; plain text
- ap-8351
- author: Maharaj, Adhir; Leach, Peter G. L.; Govender, Megan; Day, David P.
- title: Linearisation of a second-order nonlinear ordinary differential equation
- date: 2023-03-02
- words: 2478
- flesch: 59
- summary: In the search for solutions of differential equations, one discovers the beauty of the algebraic properties that the equations possess. Differential equations: Their solution using symmetries.
- keywords: analysis; differential; equation; form; function; general; journal; leach; lie; maharaj; mathematical; nonlinear; order; ordinary; point; properties; second; solution; symmetries; symmetry; transformation; university; vaidya; variable
- versions: original; plain text
- ap-836
- author: Baroňák, I.; Vozňák, M.
- title: CaC in ATM – the Diffuse Method
- date: 2006-01-03
- words: 4537
- flesch: 63
- summary: If C CFB� is valid than CFB � � � �� � � � � 2 2 12 . In the same manner as for CFB we can derive CIB, during which time we start from relation (8), and we get CIB � � � �� � � � � 2 2 22 , (14) where the artificial variable is determined � �� � �2 2� �ln( ) ln( ).
- keywords: accepted; atm; bandwidth; buffer; capacity; cdf; cell; cfb; change; cib; clr; connections; constant; czech; diffuse; diffuse method; fig; finite; infinite; line; loss; mbit; method; network; number; parameter; pcr; possible; rate; ratio; series; service; store; technical; time; university; values
- versions: original; plain text
- ap-838
- author: Bíba, J.; Vokřínek, J.
- title: Multi-agent Contracting and Reconfiguration in Competitive Environments using Acquaintance Models
- date: 2006-01-04
- words: 5855
- flesch: 48
- summary: 3.2 Contract setting An extension of levelled commitment contracts has been introduced by Excelente-Toledo et al. Keywords: multi-agent systems, competitive environments, reconfiguration, decommitment, contract price, penalty. may consequently harm the others.
- keywords: account; acquaintance; acta; agent; algorithm; business; collaborative; commitments; common; competitive; conference; contract; contracting; cooperation; costs; customer; czech; decision; decommitment; enterprise; environments; goal; house; http://ctn.cvut.cz/ap/; ieee; individual; knowledge; limitation; margin; means; model; multi; need; negotiation; partners; party; penalties; penalty; polytechnica; price; proceedings; process; profit; provider; publishing; reconfiguration; resources; respect; setting; social; systems; technical; university; usa; utility; variable; variant; vol; welfare
- versions: original; plain text
- ap-840
- author: Drahovzal, O.
- title: Supply Chain in Electro-Energetics and Real Options
- date: 2006-01-04
- words: 1891
- flesch: 54
- summary: Be- fore attempting to determine the value of the connection, it is important to take into account what might occur during cooperation with producer, and the principle underlying the cooperation: 1) Prediction of consumption is higher than the amount of electricity purchased � production of the source can be increased, or production can be started (substitution of negative deviation by the costs for the electricity pro- duced). 2) Prediction of consumption is lower than the amount of electricity purchased � production of the source can be decreased or stopped (substitution of positive deviation by the costs for non-produced electricity). The Black-Scholes formulas for standard Euro- pean call and put options have the following form: C S N d X N drt� � � � ��( ) ( )1 2e (3) P S N d X N drt� � � � � � � ��( ) ( )1 2e (4) d S X r t t1 2 2 � � � � � � � � � � � ln � � (5) d d t S X r t t2 1 2 2 � � � � � � � � � � � � � � � � � ln , (6) where S is the current value of the asset, X is the strike price of the asset, N() is the standard normal cumulative distribution function, r is the risk-free interest rate, t is time to expiration of the option, and � is the volatility of the price of the asset.
- keywords: approach; company; connection; czech; deviations; distribution; electricity; following; input; market; negative; options; price; producer; real; results; supply; system; transmission; value
- versions: original; plain text
- ap-842
- author: Havlíček, L.
- title: Financing of Liabilities Beyond the Service Life of Nuclear Installations
- date: 2006-01-04
- words: 4833
- flesch: 48
- summary: When the first generation of nuclear power plants was built, nuclear liabilities were not taken into account and contributions to such a fund was not an organic part of product (electricity) price. Especially in countries where there was no clear border between the civilian and military nuclear program, past nuclear liabilities will have to be covered from the state budget.
- keywords: account; area; assemblies; assessment; atomic; basic; connected; containers; costs; countries; czech; decommissioning; disposal; disposed; electricity; energy; european; financial; fission; fuel; funds; future; inflation; installations; intermediate; legislation; liabilities; liability; life; long; nuclear; nuclear power; operation; operator; period; plant; power; principle; radioactive; radioactive waste; rate; rawra; reactor; repository; republic; resources; responsibility; state; storage; technical; time; uranium; waste; year; čez
- versions: original; plain text
- ap-8426
- author: Lindh, Per; Lemenkova, Polina
- title: Utilising Pareto efficiency and RSM to adjust binder content in clay stabilisation for Yttre Ringvägen, Malmö
- date: 2023-05-02
- words: 11952
- flesch: 54
- summary: Finally, to examine the variables important for soil stabilisation, we also evaluated the effect of the amount of binder and the interaction between cement/lime/slag in different ratios: 30-50-20 %; 50-50-0 %; 100-0-0 % Despite widespread applications in civil engineering and extensive existing research, there are still some challenges in soil stabilisation, including the following: (1.)
- keywords: //doi.org/10.1061/(asce)mt.1943; acta; agents; analysis; anova; approach; ash; bbd; best; binder content; binders; blend; blended; box; case; ccd; cement; civil; civil engineering; clay; clayey; components; compressive; conditions; construction; content; curing; data; deep; design; development; different; effective; effects; efficiency; engineering; engineers; equation; evaluation; experimental; factorial; factors; figure; fine; fly; following; framework; gain; geotechnical; ggbfs; ground; high; https; improvement; institution; interaction; journal; laboratory; lattice; lemenkova; level; lime; lindh; linear; materials; methods; mixing; mixture; model; modelling; modified; new; opc; optimisation; order; pareto; performance; plasticity; points; polina; polytechnica; portland; proceedings; process; processing; properties; pure; quadratic; quality; quicklime; reaction; required; response; results; road; rsm; runs; samples; set; significant; simplex; slag; soil; soil stabilisation; specimens; stabilisation; stabilised; standard; statistical; strength; study; surface; sweden; swedish; table; tested; testing; tests; time; types; use; values; variables; vol; water; works
- versions: original; plain text
- ap-8428
- author: Shete, Sangeeta; Joshi, Prasad
- title: Comparative study of state space averaging and PWM with extra element theorem techniques for complex cascaded DC-DC Buck converter
- date: 2023-03-02
- words: 6526
- flesch: 65
- summary: Analytical techniques for DC DC converters and 1Φ inverters: A comprehensive review. State space averaging technique The state-space averaging method is based on analytical operations for the converter states comprising the determination of linear state model for each possible configuration of circuit and subsequently combining all these elementary models into a single and unified one through a duty factor.
- keywords: acta; analysis; analytical; approach; averaging; buck; cbc; circuit; comparative; complex; condition; conference; control; converter; current; determination; eet; electronics; element; equation; extra; figure; frequency; function; high; ieee; il1; il2; joshi; l1c1; l1c2d; mathematical; modelling; order; output; polytechnica; port; power; pwm; pwm switch; ratio; rc2; req; results; sepic; simulation; small; space; ssa; state; steady; study; switch; switches; switching; table; technique; time; transfer; vc1; vc2; voltage; ;
- versions: original; plain text
- ap-844
- author: Lakkundi, V.
- title: Ultra Wideband Communications: History, Evolution and Emergence
- date: 2006-01-04
- words: 1579
- flesch: 50
- summary: It will have the ability to support multiple devices, and even multi- ple independent piconets, so neighbours will not interfere with other UWB networks. UWB radios are designed to use coherent wide-rela- tive-bandwidth propagation, which has no Rayleigh fading.
- keywords: 1960s; acta; applications; bandwidth; communications; czech; data; development; devices; evolution; fig; frequency; high; history; http://ctn.cvut.cz/ap/; location; low; modulation; network; polytechnica; power; pulse; radar; radio; standards; systems; technology; time; ultra; university; uwb; wideband; wireless
- versions: original; plain text
- ap-846
- author: Málek, J.
- title: Bayesian Classifier for Medical Data from Doppler Unit
- date: 2006-01-04
- words: 1302
- flesch: 52
- summary: For each class, selected signal features were extracted and then used for training a Bayesian classifier. 1.1 Classes Normal course – Signals acquired by an examination of arter- ies without peripheral arterial disease (PAD) – Fig. 1.
- keywords: arterial; arteries; blood; classes; classification; classifier; data; disease; examination; features; fig; liberec; medical; modal; multi; pad; pdf; peripheral; prior; probability; signals; time; velocity
- versions: original; plain text
- ap-848
- author: Mysliveček, O.
- title: A business process model as a starting point for tight cooperation among organizations
- date: 2006-01-04
- words: 1208
- flesch: 52
- summary: Keywords: Business process management, business process model, outsourcing, joint venture, poster 2006. Business process management involves activities that should identify problems (or just a need for improvement) in the workflow of processes.
- keywords: bpm; business; companies; company; cooperation; important; inputs; management; model; outsourced; outsourcing; partner; process; processes; products; step
- versions: original; plain text
- ap-8497
- author: Chand, Madhusmita; Paitandi, Mamoni; Gupta, Mahendra Kumar
- title: Qualitative sign stability of linear time invariant descriptor systems
- date: 2023-07-04
- words: 5929
- flesch: 65
- summary: Matrix pairs which are stable, independent of their magnitudes with only sign information are denoted as Qualitative Sign Stable (QLSS) matrix pairs and Qualitative Sign Unstable are denoted as ‘QLSU’ ma- trix pairs. Matrix pairs, whose stability/instability depend upon the magnitude information of the matrix pair elements, are denoted as Magnitude Dependent Stable/Unstable (MDS/U) matrix pairs.
- keywords: bad; conditions; control; descriptor; diagonal; ecological; eij; elements; form; good; information; interactions; linear; links; magnitude; matrix; matrix pair; nbad; necessary; negative; nlc; number; pair; paper; positive; qlsu; qualitative; qualitative sign; sign; stability; stable; structure; sufficient; systems; time; total; unstable; ζnet; ηbad; ηng; − −
- versions: original; plain text
- ap-850
- author: Salinger, J.
- title: Measurement of Solar Cell Parameters with Dark Forward I-V Characteristics
- date: 2006-01-04
- words: 2272
- flesch: 61
- summary: If there are, for example, two deep levels of approximately the same concentration, however, the standard extracting tech- nique will lead to incorrect values of deep level energy. In the case of silicon, which is widely used in photovoltaic appli- cations, the way to achieve thermal equilibrium, is either by Auger recombination or by capturing free charge carriers on energy levels that lie in the band that separates the conduc- tion and valence band (the forbidden band, or the band gap).
- keywords: band; carriers; cell; characteristics; charge; current; dark; deep; density; dependence; diode; efficiency; energy; factor; fig; lattice; le2; levels; lifetime; method; parameters; range; recombination; region; resistance; samples; shunt; solar; temperature
- versions: original; plain text
- ap-852
- author: Spiertz, M.; Rusert, T.
- title: Central Decoding for Multiple Description Codes based on Domain Partitioning
- date: 2006-01-04
- words: 2286
- flesch: 59
- summary: 6: Highest rate decoder (solid line) vs. intersection decoder (dotted line), gaussian source with unit-variance and zero mean, rate: 2bpss Fig. 7: Lena 512×512, highest rate decoder (solid line) vs. linear superposition decoder (dotted line), PSNR for central de- coder: 30dB Fig. 8: Lena 512×512, highest rate decoder (solid line) vs. inter- section decoder (dotted line), PSNR for central decoder: 30dB The second, more complex approach is at least as good as the highest rate reconstruction, and by proper choosing of quantization intervals, a significant reduction of the distor- tion at the central decoder is possible. (3) By applying more than one quantizer intervals, formula (3) becomes: x L U ii i� �(max( ), min( )), .
- keywords: central; coding; decoder; decoding; descriptions; different; domain; fig; highest; ieee; intersection; intervals; linear; lower; mdc; multiple; quantization; quantizer; rate; reconstruction; redundancy; results; source; superposition; vol
- versions: original; plain text
- ap-8536
- author: Farkas, Izabella Ingrid; Pelantová, Edita; Svobodová, Milena
- title: From positional representation of numbers to positional representation of vectors
- date: 2023-07-04
- words: 9256
- flesch: 74
- summary: An origin of such numeration sys- tems can be found in works [11] and [12] of A. Vince, showing that for any expansive matrix M ∈ Zm×m, there exists a digit set D ⊂ In [15], it is shown that for M ∈ Zm×m with det M = ∆ ̸= 0, there ex- ists a finite digit set D ⊂
- keywords: acta; addition; algebraic; algorithm; base; base m; complex; computable; denote; digit; digit set; eigenvalue; example; expansive; fact; find; find(m; finite; form; function; integer; j dj; j∈z; j∈z m; l=0,l; lattice; lemma; linear; local; m j; matrix; matrix m; means; minimal; non; number; numeration; parallel; pelantová; perd; periodic; polynomial; polytechnica; positional; proof; p−1∑; representation; set; size; sum; svobodová; system; theorem; unit; vectors; zero; zm×m; ̸=l
- versions: original; plain text
- ap-854
- author: Stehle, T.
- title: Removal of Specular Reflections in Endoscopic Images
- date: 2006-01-04
- words: 2843
- flesch: 68
- summary: If F(k) consisted only of two lines at s and N s, i.e. F k F k F s k s F N s k N s( ) �( ) �( ) ( ) �( ) ( )� � � �� � (3) convolution with the window spectrum W(k) would yield for the observed pair � �G s N F s W F s W s G s N F s W ( ) �( ) ( ) � ( ) ( ) ( ) � ( ) ( ) * * * * � � � 1 0 2 1 0� �� �( ) ( ) ,*F s W s2 (4) where �( )F s and �( ) � ( )*F N s F s � are the estimated coeffi- cients.
- keywords: algorithm; deconvolution; endoscopic; error; f s; fig; g n; image; k n; k s; line; n f; n n; n w; pair; physician; reflections; s n; s w; spectral; specular; university; w k
- versions: original; plain text
- ap-8549
- author: Litoš, Jiří; Šána, Vladimír; Uhlík, Adam; Kolář, Karel; Nguyen, Markéta
- title: Mechanical and physical properties of cement mixtures for 3D processing
- date: 2023-07-04
- words: 4808
- flesch: 55
- summary: Thanks to a controlled and continuous hydration process, such mixtures retain a sufficient workability time and also have a rapid increase in initial, especially mechanical, properties. Samples placement of tested mixtures in a desiccator.
- keywords: 3d printing; acta; application; bulk; cement; cementitious; changes; coefficient; composites; compressive; concrete; conductivity; construction; days; density; design; development; elements; experimental; figure; formwork; hand; high; important; increase; materials; measured; measurements; mechanical; mixture; physical; physical properties; polytechnica; printing; processing; properties; reference; research; results; robotic; samples; strength; suitable; surface; technology; tensile; test; tested; thermal; thermo; time; use; values; volume; water
- versions: original; plain text
- ap-856
- author: Šimek, M.
- title: Embedded Operating System for MicroBlaze
- date: 2006-01-04
- words: 2018
- flesch: 55
- summary: In the case of embedded systems, this allows an increasing amount of their functionality to be moved to software, instead of designing it as a pure hardware solution. Unlike “standard” Linux, uClinux may be used even for embedded systems that have a main memory size as big as an L2 cache in an ordinary personal computer.
- keywords: applications; boot; booting; computer; configurable; controller; core; czech; development; devices; distribution; file; flash; hardware; interface; kernel; loader; memory; microblaze; operating; platforms; processor; project; root; software; standard; strategy; support; system; time; uclinux; work; xilinx
- versions: original; plain text
- ap-858
- author: Valoušek, P.
- title: A Digital Loudspeaker: Experimental Construction
- date: 2006-01-04
- words: 1352
- flesch: 57
- summary: A digital loudspeaker is a single device system which uses di- rect D/A conversion for digital audio signals. Keywords: Digital loudspeaker, signal processing, transducer array.
- keywords: array; audio; bit; chain; construction; conversion; data; digital; driving; experimental; fig; frequency; input; loudspeaker; principle; processing; serial; signal; source; streams; system; transducer; unit; vol; wide
- versions: original; plain text
- ap-860
- author: Vítek, T.; Pachner, D.
- title: A Reservation Aggregation Framework Design for Demand Estimation
- date: 2006-01-04
- words: 2615
- flesch: 65
- summary: These two sets can be created by ordering the following sets � �R r R r rf i e i m� � � , (8) � �R r R r For a partic- ular date the set can be created by ordering the union � � � �R r r r r r re n n m� �0 1 2 1, , , , ,� .
- keywords: advance; aggregation; check; czech; data; date; day; days; demand; fig; future; hotel; hours; index; indices; interval; management; number; particular; period; price; r r; reservations; set; system; technical; time; university; unknown; vol; yield
- versions: original; plain text
- ap-8605
- author: Flídr, Erik
- title: Derivation of entropy production in a fluid flow in a general curvilinear coordinate system
- date: 2023-05-02
- words: 4544
- flesch: 67
- summary: Keywords: Entropy production, fluid flow, general curvilinear coordinates, linear blade cascade, experimental data. 2/2023 Derivation of entropy production in a fluid flow 4.
- keywords: balance; basis; blade; components; control; coordinate; curvilinear; derivation; derivatives; description; differential; distribution; energy; entropy; entropy production; equal; equation; figure; flow; fluid; form; general; geometry; gij; heat; integral; law; momentum; pressure; production; second; stress; surface; system; tensor; thermodynamics; time; vector; velocity; volume; ∂ηj
- versions: original; plain text
- ap-8606
- author: Semenov, Stanislav; Mikhailov, Evgeny; Kliuiev, Sergii; Dižo, Ján; Blatnický, Miroslav; Ishchuk, Vadym
- title: Improvement of energy efficiency of a tram’s running gear
- date: 2023-07-04
- words: 7767
- flesch: 56
- summary: Keywords: Energy efficiency, tram’s bogie, simulations, MBS model, railway wheel. Currently, the transport industry is faced with the urgent task of ensuring the energy efficiency of vehicles, including rail vehicles.
- keywords: acta; analysis; average; axle; body; bogie; car; components; condition; considered; construction; consumption; contact; corresponding; creep; curves; design; dissipation; efficiency; energy; energy efficiency; engineering; et al; figure; forces; friction; gear; influence; innovative; installation; kinematic; kinematic resistance; losses; main; mechanical; mechanical energy; model; movement; number; n·kn; perspective; pks; points; polytechnica; possible; power; radial; rail; rail vehicle; railway; research; resistance; results; rolling; rotating; rotation; route; running; running gear; russian; scheme; simulation; sliding; slip; solutions; specific; specific resistance; speed; standard; stock; study; surfaces; system; tks; track; tram; tram car; transport; transportation; use; value; vehicle; wear; wheels; wheelset
- versions: original; plain text
- ap-8612
- author: Royaei, Javad; Sadeghi, Kabir; Nouban, Fatemeh
- title: A comparative experimental investigation of high-temperature effect on fibre concrete and high strength concrete using UT and CM methods
- date: 2023-07-04
- words: 4960
- flesch: 49
- summary: Finally, the summary of the comparison of the re- sults of compressive strength tests of concrete samples with a compression machine and the ultrasonic test is as follows in Figure 15. Based on the summary of the comparison of the re- sults of compressive strength tests of concrete samples with the compression machine and ultrasonic test, it Figure 14.
- keywords: //doi.org/10.1016; accuracy; average; building; carbonation; celsius; cement; comparison; compression machine; compressive; compressive strength; concrete; concrete samples; construction; decrease; degrees; design; destructive; different; different temperatures; effect; error; exposure; fibres; figure; fire; high; high temperatures; https; machine; machine test; materials; methods; minutes; mix; non; observed; plastic; research; resistance; results; samples; steel; strength; strength concrete; strength test; structures; temperatures; test error; tests; time; ultrasonic test
- versions: original; plain text
- ap-862
- author: Ritty, A.
- title: Directional Loudspeaker Using a Parametric Array
- date: 2006-01-04
- words: 1575
- flesch: 61
- summary: He suggests that the sound pressure of secondary waves (ps) produced by the nonlinear interaction is �p c p t c p t s s p� � � 1 0 2 2 2 0 0 4 2 2 2 � � � � � � , (1) where pp is the sound pressure of primary waves, � is the non- linear coefficient, �0 is air density, and c0 is sound velocity. The nonlinearities of air cause high frequency wave components (primary waves) to interact.
- keywords: acoustics; amplitude; array; audible; cavity; demodulated; distortion; frequency; loudspeaker; modulation; nonlinear; parametric; pressure; primary; processing; pvdf; response; self; signal; sound; transducer; wave
- versions: original; plain text
- ap-864
- author: Polyák, T.
- title: Robust Watermarking of Video Streams
- date: 2006-01-04
- words: 1441
- flesch: 65
- summary: After this, there will be large 0 and 1 islands, so that during watermark detection the patterns can be more easily recog- nized, and the watermark will be more resistant to attack. Payload: different applications need watermarks of differ- ent sizes.
- keywords: algorithm; bits; blocks; data; embed; fig; frame; information; key; medium; pattern; quality; robustness; stego; values; video; watermark; watermarking
- versions: original; plain text
- ap-866
- author: Pourová, M.; Vrba, J.
- title: Microwave Drying of Textile Materials and Optimization of a Resonant Applicator
- date: 2006-01-05
- words: 1829
- flesch: 61
- summary: By modifying the diagrams on the right side (Fig. 4) we can arrive at the resulting expression for calculating the E-field strength in the textile plane: E e en x n j n n ( , , ) ( ) ( )� �� � � � � �2 1 2 2 1 2 0 tex = + ⋅ − − + = ∞ ∑ , (1) parameters �2 and �tex are given by the dielectric properties of the textile, so we can write the electric field strength de- pendent on relative permittivity �tex and loss factor tg �tex as follows E e e j t t j ( , , ) ( ) ( ) � � � � � � � � � � � tex textg tex tex = − ⋅ + ⋅ ⋅ +2 1 2 e t� � �tex ⋅ − −1 2 21 . Also the complex permittivity of dried textile is not constant during the proce- dure.
- keywords: applicator; cells; content; dependence; distance; distribution; drying; electric; factor; field; fig; loss; microwave; moisture; permittivity; resonator; results; strength; system; textile
- versions: original; plain text
- ap-868
- author: Kuhlenkötter, B.; Zhang, X.; Krewet, C.
- title: Quality Control in Automated Manufacturing Processes – Combined Features for Image Processing
- date: 2006-01-05
- words: 3821
- flesch: 57
- summary: Table 2 shows the combined matrix of defects classification using Gabor and statistical features. A large range of methods is introduced to present defect images.
- keywords: acta; automatic; categories; classification; classifier; combined; czech; database; defects; extraction; features; fig; filter; gabor; greyscale; house; http://ctn.cvut.cz/ap/; image; information; label; manufacturing; new; polishing; polytechnica; pore; process; processes; processing; project; pseudo; ratio; real; software; statistical; surface; system; table; technical; university; vision; vol
- versions: original; plain text
- ap-870
- author: Dolšak, B.; Novak, M.; Kaljun, J.
- title: Intelligent Support for a Computer Aided Design Optimisation Cycle
- date: 2006-01-05
- words: 5549
- flesch: 51
- summary: 5/2006 Intelligent Support for a Computer Aided Design Optimisation Cycle B. Dolšak, M. Novak, J. Kaljun It is becoming more and more evident that adding intelligence to existing computer aids, such as computer aided design systems, can lead to significant improvements in the effective and reliable performance of various engineering tasks, including design optimisation. Evidently, traditional design optimisation systems that concentrate on numerical aspects of design process are not successful in integrating numerical parts with human expertise [3].
- keywords: actions; advice; aesthetic; analysis; appropriate; cad; case; classification; computer; cycle; data; defects; design; design optimisation; designer; development; different; element; engineering; ergonomic; experience; expert; fea; femdes; fig; final; finite; hand; important; intelligent; knowledge; mesh; module; numerical; optimisation; order; phase; problem; process; processes; processing; product; propose; pseudo; real; redesign; results; rules; software; specific; steps; structural; support; system; tool; university; user; vol
- versions: original; plain text
- ap-872
- author: Caputo, F.; Gironimo, G. Di; Marzano, A.
- title: Ergonomic Optimization of a Manufacturing System Work Cell in a Virtual Environment
- date: 2006-01-05
- words: 5085
- flesch: 50
- summary: 5/2006 Operations OP 1 OP 2 OP 3 OP 4 OP 5 OP 6 OP 7 OP 8 OP 9 Score Parameters 1 3 2 1 2 3 2 2 4 S i� � 1 9 Worker Percentile � � � � � � � � � 20 Postural positions � � � � 5 Geometric parameters body Locking point body � � � � � 7 Table 1: Definition of the parameters to be optimized Score value Meaning 0 This is defined as: WEI PEI( )Configuration Wj i i i � �� , (2) where: W Time of Operationi i� Work Cell Time cycle.
- keywords: accessibility; acta; analysis; assembly; association; body; case; cell; critical; design; environment; ergonomics; evaluation; factors; fig; following; geometric; http://ctn.cvut.cz/ap/; human; index; international; jack; manufacturing; method; methodology; new; operation; optimal; optimization; order; owas; parameters; pei; phase; polytechnica; possible; posture; rula; score; simulation; software; studies; study; table; task; technical; time; tools; university; upper; use; value; virtual; vol; wei; welding; work; workers; working; workplace
- versions: original; plain text
- ap-874
- author: Sýkora, M.
- title: Advanced Load Effect Model for Probabilistic Structural Design
- date: 2006-01-05
- words: 5957
- flesch: 64
- summary: � � � � � � � � ) ). Using the probability density function (PDF) of an exponential distribution f erenT tt( ) � �� � , the central limit theorem for a sum of �n independent random variables, see Weisstein [8], and the expected value E[ ]Tren �1 �, the probability becomes � � P d P dren ren, [ ( , )]
- keywords: cdf; conditions; czech; derived; distribution; duration; effective; expected; exponential; fig; initial; load; non; number; on“-state; p t; period; point; pon(t; probability; process; processes; pulses; random; renewal; s(t; stationary; structural; t t; t t0; t �; t0eff; t0on; time; ton; tren; vol; z(t
- versions: original; plain text
- ap-876
- author: Stenzel, R.; Müller, L.; Herrmann, T.; Klix, W.
- title: Numerical Simulation of Nanoscale Double-Gate MOSFETs
- date: 2006-01-05
- words: 2831
- flesch: 64
- summary: Jp p p p p B p p� � � � � � � �q p D q p k p T� � � �( ) ( ) ( ) (4) Jn n n n n B n n� � � � � � � �q n D q n k n T� � � �( ) ( ) ( ) (5) Jp, Jn current densities (Acm �2) R, G recombination and generation rate (cm�3s�1) �p, �n carrier mobilities (cm 2V�1cm�1) �p, �n quantum correction potentials (V) �p, �n band parameters (V) Dp, Dn diffusion coefficients (cm 2s�1) Tp, Tn carrier temperatures (K) kB
- keywords: basic; channel; characteristics; device; different; doping; drain; energy; equations; fig; gate; hydrodynamic; lengths; model; n n; output; parameters; quantum; semiconductor; short; simulation; source; structure; thickness; tox; tsi; vds; vgs; vol
- versions: original; plain text
- ap-878
- author: Poul, R.; Růžička, P.; Hanus, . D.; Blahouš, K.
- title: Design of Carbon Composite Driveshaft for Ultralight Aircraft Propulsion System
- date: 2006-01-05
- words: 2072
- flesch: 62
- summary: Shaft version two did not take the need of low torsional stiffness into account. Shaft version 2 is of relatively low axial stiffness and of still too high torsional stiffness.
- keywords: adhesive; axial; bond; carbon; central; composite; criterion; czech; design; direction; driveshaft; failure; fig; high; hsc; means; modulus; moment; properties; puck; shaft; shear; stiffness; strength; stress; subscript; technical; torsional; version; vol; wall
- versions: original; plain text
- ap-880
- author: Weiss, S.; Jänsch, J.; Birkhofer, H.
- title: Term Analysis – Improving the Quality of Learning and Application Documents in Engineering Design
- date: 2006-01-05
- words: 3650
- flesch: 60
- summary: So, when setting up or using text documents for teaching or application, it is essential to provide concept homogeneity. If one uses different termini to describe the same concept, the learner starts to look for differences in the properties and tries to set up a second category or concept.
- keywords: authors; concept; content; design; development; different; documents; e b; e n; fig; homogeneity; important; key; knowledge; learning; list; navigator; pinngate; potential; problem; process; product; properties; quality; step; teaching; term list; termanalysis; termini; text; tool; university; user; variations; vol; words
- versions: original; plain text
- ap-882
- author: Zajíček, R.; Vrba, J.; Novotný, K.
- title: Evaluation of a Reflection Method on an Open-Ended Coaxial Line and its Use in Dielectric Measurements
- date: 2006-01-05
- words: 2601
- flesch: 51
- summary: For distilled water, the dielectric constants are: � �� � 78.3, � �s � 4.6, � � � 8.07 ps, � �i � 2 S�m �1, � � � 0.014. In its simplest form, each of these relaxation regions is the manifestation of a polarization mechanism characterized by a single time constant � (relax- ation time � is a measure of the mobility of the molecules and dipoles that exist in a material), which to a first order approxi- mation gives the following expression for complex relative permittivity �r as a function of angular frequency �. � � � � � � �� r r r s� � � �� � � � � � �j j1 .
- keywords: biological; circuit; coaxial; coefficient; complex; czech; dielectric; equivalent; factor; field; fig; frequency; line; loss; material; measured; measurement; method; open; parameters; permittivity; prague; probe; reflection; relative; sample; technical; time; tissue; university; use
- versions: original; plain text
- ap-884
- author: Zítek, P.; Vyhlídal, T.; Chyský, J.
- title: Experience of Implementing Moisture Sorption Control in Historical Archives
- date: 2006-01-05
- words: 4674
- flesch: 47
- summary: The model is clearly not suitable for air humidity approaching the state of saturation, i.e. for � � 1, since then the logarithm is not defined. The logarithmic Henderson model was chosen as the most suitable available model, namely its three-parameter version [5] u A T B C � � � � � � � � ln( ) ( ) 1 � , (1) where � � 0 1, is the relative air humidity expressed as a dimensionless ratio, T is air temperature in °C and u is EMC, expressed as the ratio of moisture mass content to the mass of anhydrous material.
- keywords: acta; adjustment; air; air humidity; archives; buildings; changes; collection; constant; content; control; czech; device; emc; environment; equilibrium; etc; exhibits; fig; henderson; historical; house; http://ctn.cvut.cz/ap/; humidity; implementation; interior; materials; measured; measurements; microclimate; model; moisture; moisture content; paper; parameters; polytechnica; proposed; publishing; relationship; relative; samples; sorption; state; t b; table; technical; temperature; třeboň; university; values; variations; vol; wood
- versions: original; plain text
- ap-886
- author: Jokl, M. V.; Kabele, K.
- title: Optimal (Comfortable) Operative Temperature Estimation Based on Physiological Responses of the Human Organism
- date: 2006-01-06
- words: 6139
- flesch: 60
- summary: Heat flux within the human body can be represented as (see model in Fig. 4): q q q q G T T R T T m res tr a t,ti i sk t,ti i sk W m � � � � � � � � � ( ) ( ) [ ] 1 2 (2) where Gt, ti is total body thermal conductance, which can be expressed by Eq. 2 Mathematical model of the physiological body response The total heat rate production and its distribution into individual components during heat exchange between the human body and the environment are shown in Fig. 4, where qm � M � W � metabolic heat (see Jokl 1989).
- keywords: acta; activity; air; ashrae; body; buildings; category; changes; clo; clothing; comfort; comparison; conditions; constant; czech; environment; equation; fig; heat; house; http://ctn.cvut.cz/ap/; human; iso; level; line; max; mean; metabolic; min; neutral; onset; operative; opt; optimal; pmv; polytechnica; publishing; range; rate; resistance; results; skin; state; steady; subjects; sweating; table; technical; temperature; thermal; thermoregulatory; time; university; values; vol; vote; zone
- versions: original; plain text
- ap-888
- author: Kalvoda, L.; Klepáček, R.
- title: Extraction of Alkali Ions Investigated by Conductometric and pH Measurements
- date: 2006-01-06
- words: 2467
- flesch: 55
- summary: Information about instant, se- lective concentrations of Na�, K�, Mg2� and Ca2� ions has considerable relevance for assays of biological fluids, such as human and animal blood, sap, or, for instance, for tests of drinking water, underground water, water used in the food-processing industry, and waste water. The latter process shows remarkable preference for Na� ions with the selectivity ratio �(Na�)/�(K�) ~ 400
- keywords: alkali; aqueous; basic; cacl2; case; chloride; cladding; complex; concentration; conductivity; czech; extraction; fibre; fig; hexane; hydrolysis; ionophore; lipophilic; membrane; naoh; observed; phase; process; reaction; solutions; target; tbt; technical; temperature; tested; time; university; value; water
- versions: original; plain text
- ap-890
- author: Makovička, D.
- title: Response Analysis of an RC Cooling Tower Under Seismic and Windstorm Effects
- date: 2006-01-06
- words: 3036
- flesch: 52
- summary: The temperature of the inter- nal columns and is unaffected by temperature fluctuations in the operation process; therefore these members are left without temperature load. The internal stiffeners and the dia- phragm beam are subject to temperature load only at their edges, where they contact the external walls and ceiling.
- keywords: actions; axis; basic; concrete; czech; design; direction; ductility; dynamic; effects; elements; external; fig; forces; horizontal; internal; load; loading; longitudinal; natural; plate; pressure; reinforcement; response; seismic; states; static; stiffeners; structure; surface; technical; temperature; towers; vertical; vibration; walls; wind
- versions: original; plain text
- ap-892
- author: Rieger, F.
- title: Determination of Rheological Parameters from Measurements on a Viscometer with Coaxial Cylinders – Choice of the Reference Radius
- date: 2006-01-06
- words: 1170
- flesch: 70
- summary: If the logarithmic plot of shear stress �r on shear rate �� r is linear, the consistency coefficient K is �-intercept and flow index n is the slope of a straight line. If plot of shear stress �r on shear rate �� r is linear, the yield stress �0 is �-intercept and plastic viscosity �p is the slope of a straight line.
- keywords: equation; fig; newtonian; radius; rate; ratio; shear; stress; viscometer
- versions: original; plain text
- ap-894
- author: Elnagahy, F. I. Y.; Haroon, A. A.; Azzam, Y. A.; Alawy, A. El-Bassuny; Elminir, H. K.; Šimák, B.
- title: Embedded Coding of Astronomical Images
- date: 2006-01-06
- words: 3483
- flesch: 60
- summary: The subjective quality tests show that RPSWS reconstructed images are better than SPIHT reconstructed images at lower bit rates, as shown in Fig. 6, 7, and 8. From the results presented here we conclude that the qualities of RPSWS reconstructed images are better than those of SPIHT reconstructed images at lower bit rates for both color and gray scale images.
- keywords: algorithm; astronomical; band; bit; bits; cluster; coder; coding; coefficients; color; components; compression; czech; data; fig; galaxy; gray; images; insignificant; left; pixel; quality; rates; reconstructed; results; right; rpsws; scale; significance; space; spiht; stream; sub; technical; threshold; transmission; university; vol; wavelet
- versions: original; plain text
- ap-896
- author: Bořil, H.; Fousek, P.
- title: Influence of Different Speech Representations and HMM Training Strategies on ASR Performance
- date: 2006-01-06
- words: 2433
- flesch: 62
- summary: Are the best models for neutral speech also the best for Lombard speech? HMMs tested with neutral speech appear to converge much earlier than with Lombard speech.
- keywords: bandwidth; case; cepstral; channel; clsd’05; czech; drop; effect; features; female; fig; formant; frequency; hmm; hmms; khz; lombard; mfcc; mixtures; neutral; number; office; performance; plp; recognition; recognizer; speech; speecon; strategies; table; technical; telephone; training; university; vol
- versions: original; plain text
- ap-898
- author: Soliman, Hussein F.; Attia, Abdel-Fattah; Mokhymar, S. M.; Badr, M. A. L.
- title: Fuzzy Algorithm for Supervisory Voltage/Frequency Control of a Self Excited Induction Generator
- date: 2006-01-06
- words: 4984
- flesch: 68
- summary: Lds ds L Lds� � � , (24) ( ) ( )L pi v R iL Lqs qs L Lqs� � � , (25) C v t i v L i t R � � � � � � � � � � � � � � � � �d d d dds ds ds L Lds L , (26) C v t i v L i t R � � � � � � � � � � � � � � � � �d d d dqs qs qs L Lqs L , (27) where iLds is the load current in the direct axis, iLqs the load current in quadrant axis, RL the load resistance (�), LL the load inductance (H). im qr qs dr ds� � � �( ) ( ) .2 2 0 5, (13) � �T
- keywords: acta; angle; axis; capacitor; change; controller; current; czech; dynamic; energy; error; fig; flc; frequency; fuzzy; gain; generator; house; http://ctn.cvut.cz/ap/; induction; input; integral; kiv; load; mechanical; output; performance; polytechnica; power; publishing; rotor; seig; simulation; speed; stator; system; terminal; turbine; university; value; variable; voltage; wind
- versions: original; plain text
- ap-900
- author: Prajzler, V.; Burian, Z.; Hüttel, I.; Špirková, J.; Hamáček, J.; Oswald, J.; Zavadil, J.; Peřina, V.
- title: Properties of Erbium and Ytterbium Doped Gallium Nitride Layers Fabricated by Magnetron Sputtering
- date: 2006-01-06
- words: 3657
- flesch: 59
- summary: For erbium and ytterbium doping into GaN layers, erbium metallic powder and ytterbium powder or Er2O3 and Yb2O3 pellets were laid on the top of the target. GaN layers are usually grown by epitaxy methods such as Metal Organic Chemical Vapor Deposition (MOCVD) and Molecular Beam Epitaxy (MBE)
- keywords: czech; deposition; doping; epitaxy; er2o3; er3; erbium; fig; films; ga2o3; gallium; gan; gan layers; growth; ions; journal; layers; magnetron; mail; materials; metallic; nitride; optical; pellets; photoluminescence; physics; polytechnica; powder; rbs; room; samples; spectra; sputtering; target; technical; temperature; university; vol; yb3; ytterbium
- versions: original; plain text
- ap-902
- author: Bíla, J.; Jura, J.
- title: Fuzzy Concepts in the Detection of Unexpected Situations
- date: 2007-01-01
- words: 5122
- flesch: 64
- summary: g of1 1 1 1� �, ,� � n n (1) Model MSS has in general the following form: MSS S S S Inv Inv� , 1� � � �( ), , ( ) , ( ), , ( )� �n i p , (2) where S represents a basic set of situations, � �1( ), , ( )S S� n are structures on S considered as relevant for UX3 de- tection and Inv Inv( ), , ( )� �i p� are invariants on some � �1( ), , ( )S S� n � �( , , , )i p n� 1 � for UX3 detection.
- keywords: approach; association; basic; block; bíla; case; classes; cognitive; concepts; conf; czech; data; detecting; detection; elements; emergence; example; faults; fdi; fig; following; form; fuzzy; general; inv(; invariant; knowledge; md(ux3; method; model; msf; mss; paper; phase; process; processes; quantities; recognition; rules; set; signals; situations; special; structure; system; technical; type; unexpected; university; ux3; variables; violation; vol; zone; � n; � �
- versions: original; plain text
- ap-904
- author: Siegel, J.; Kotál, V.
- title: Preparation of Thin Metal Layers on Polymers
- date: 2007-01-01
- words: 1619
- flesch: 68
- summary: The power of the plasma dis- charge was constant at a level of 8.6 W. The contact angle of the pristine polymers and of the polymeric sheets directly after plasma treatment, and also of the future development of surface wettability was determined using the Surface Energy Evaluation System device. A rapid decrease in surface wettability for the samples immediately after plasma treatment is obvious from the mea- surements of the dependence of the contact angle on time © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 9 Acta Polytechnica Vol. 47
- keywords: afm; angle; contact; deposition; fig; gold; image; layers; metal; pet; plasma; polymeric; polymers; pristine; ptfe; surface; thickness; time; treatment; vol
- versions: original; plain text
- ap-906
- author: Martinez, M. Herrera
- title: Evaluation of Audio Compression Artifacts
- date: 2007-01-01
- words: 2679
- flesch: 53
- summary: Higher levels of signal decomposition, of course, will give more accurate representations of the audio signal, in a similar manner as higher frequency resolution improves the accuracy of the frequency representation of the signal in FFT. DWT, then, has a hierarchical structure in which the higher the level that the decomposition affords, the longer the hierarchical DWT tree. Some authors observe that subband coders give better re- sults when tracking transient signals, but the fixed window length that they apply does not track these signals accurately.
- keywords: artifact; audio; basis; bit; character; coders; coding; coefficients; compression; czech; dct; decomposition; domain; dwt; evaluation; factor; fft; fig; frequency; hybrid; preecho; representation; results; signal; step; structure; subband; subjective; systems; technical; tracking; transform; transient; type; university; vol; wavelet
- versions: original; plain text
- ap-908
- author: Pastor, O.
- title: Indirect Determination of the Risk of Transportation Projects
- date: 2007-01-01
- words: 2161
- flesch: 51
- summary: This development is viewed in terms of time as well as the effects and requirements of the assessed project throughout its life (development period of the territory). The basic blocks for assessing transportation projects can comprise: Direct demand of users:
- keywords: assessment; certain; characteristics; criteria; criterion; czech; determination; development; efficiency; evaluating; fig; global; indirect; locality; monotonous; multi; order; period; project; risk; set; table; time; transportation; university; variants
- versions: original; plain text
- ap-910
- author: Pastor, O.; Novotný, P.; Melechovský, J.
- title: Support for Expert Estimations in Transportation Projects
- date: 2007-01-01
- words: 1122
- flesch: 40
- summary: Subjective probabilities have to be applied at this preparatory stage of transportation project. Even in this scheme of application of the Monte Carlo method, subjective probabilities have to be used.
- keywords: analysis; assessment; czech; decision; determining; distribution; expert; factors; information; making; probabilities; probability; project; risk; subjective; transportation; university
- versions: original; plain text
- ap-912
- author: Popelová, L.
- title: The Symbolic-Aesthetic Dimension of Industrial Architecture as a Method of Classification and Evaluation: the Example of Bridge Structures in the Czech Republic
- date: 2007-01-01
- words: 5114
- flesch: 61
- summary: 7 Conclusion This paper is a contribution in support of a criterion that will systematically evaluate industrial structures, including bridge structures, from a symbolic-aesthetic perspective. Industrial structures from the Czech Republic are used as examples, and a specific analy- sis is made of two bridges.
- keywords: 1908–1909; acta; aesthetic; architecture; association; bridge; buildings; case; categories; category; centre; charles; city; criterion; czech; dimension; e.g.; example; face; fig; form; heritage; historical; house; http://ctn.cvut.cz/ap/; human; image; important; industrial; industrial structures; koula; left; like; long; metaphor; modern; new; objects; old; paper; perception; perspective; polytechnica; prague; praha; production; publishing; republic; right; role; small; specific; structures; stylistic; svatopluk; symbolic; technical; technical structures; technology; time; towers; typical; unity; university; value; vol; water; way; works; world; čech; čech bridge
- versions: original; plain text
- ap-914
- author: Martinez-Val, R.
- title: Flying Wings. A New Paradigm for Civil Aviation?
- date: 2007-01-01
- words: 7753
- flesch: 64
- summary: The present paper discusses the main features of flying wings, their advantages over conventional competitors, and some key operational issues, such as evacuation and vortex wake intensity. This paper discusses the main features of flying wings and blended wing bodies, their advantages over conventional competitors, and some key operational issues, such as airport operation, evacuation, and vortex wake intensity.
- keywords: acta; advantages; aerodynamics; aiaa; aircraft; airliners; airplanes; airport; area; arrangement; aspect; average; aviation; blended; body; bwb; cabin; civil; class; commercial; concepts; conceptual; configuration; consumption; conventional; cruise; current; czech; design; distance; doors; drag; emergency; engines; evacuation; evolution; exits; field; fig; flight; flow; flying; fuel; fuselage; future; great; high; house; http://ctn.cvut.cz/ap/; inner; jet; jets; journal; landing; large; layout; leading; lfc; lift; lower; main; major; martinez; maximum; medium; minimum; mtow; new; number; outer; paper; passenger; payload; polytechnica; publishing; range; ratio; rear; results; seat; servicing; similar; size; skin; space; specific; structural; subsonic; table; technical; terms; time; traffic; transport; university; usa; val; vol; wake; weight; wing
- versions: original; plain text
- ap-916
- author: Dunne, G. V.
- title: Functional Determinants for Radially Separable Partial Differential Operators
- date: 2007-01-02
- words: 5523
- flesch: 70
- summary: The primary motivation of this work is for applications in quantum field theory, so we concentrate on examples in two, three and four dimensions, but the mathe- matical generalization to arbitrary dimension should be clear. Consider the radially separable partial differential operators � � � �� V r( ) ;�free � �� (1) where � is the Laplace operator in|R d , and V(r) is a radial po- tential vanishing at infinity as r�2�� for d � 2 and d � 3, and as r�4�� for d � 4. A conventional renormalization choice is to take � � m in (6)–(8).
- keywords: analytic; applications; arxiv; asym; continuation; d �; deg; determinant; differential; dimensions; field; free �; function; hep; jost; l d; l l; l r; math; mr �; operators; partial; phys; potential; quantum; radial; results; rev; s s; s �; separable; sum; terms; theory; vol; yaglom; zeta; � m2; � r
- versions: original; plain text
- ap-917
- author: Fischer, M.; Mlček, M.; Konvičková, S.; Kittnar, O.
- title: Computer Insight into the Molecular Level of Heart Failure. What is the Role of NCX?
- date: 2008-01-01
- words: 4294
- flesch: 57
- summary: i e n r E t F RT e ( ) ( ) ( ) ( ) � � � � � � � � �3 2 3 � �Ca t ei n r E t F RT( ) ( ) ( ) ( ) � � � � � � 2 1 and ionic flux as Q t A C V z F I tNaCa cap SC c NaCa( ) ( )� � � � , where k(t) is the saturation parameter (see [8]), Nai (12 mol/m 3) is intracellular sodium concentration, Cae (1,8 mol/m3) is extracellular calcium concentration, n (3) is stoichiometry of Na-Ca exchange, r (0.15) is position of the peak of the energy barrier separat- ing two states – activation and deactivation of the exchanger, E(t) is action potential, F (96485.3415 s�A /mol) is Faraday constant, R (8.3144 J/K�mol) is ideal gas constant, T (290.15 K) is absolute temperature, Nae (140 mol /m 3) is extracellular sodium concentration, Cai(t) is intracellular calcium concentration, Acap (1.534 e 8 m2) is capacitive membrane area, CSC (1 F /m 2) is specific membrane capacity, Vc (25 e 12 m3) is cellular volume, and z (2) is valence of calcium ion. According to some findings that report NCX activity in failing hearts [11], the NCX activity was varied between 50, 75, 100 and 130 % of normal activity.
- keywords: acta; activity; adobe; altered; ca2; calcium; cardiac; cellular; concentration; contraction; contribution; czech; data; ecc; effect; exchanger; experimental; failing; failure; false; fig; force; function; handling; heart; house; http://ctn.cvut.cz/ap/; intracellular; ionic; low; mechanisms; model; molecular; ncx; norm; performance; polytechnica; potential; publishing; rate; relaxation; republic; role; serca; simulation; stores; technical; time; total; true; university; vol
- versions: original; plain text
- ap-918
- author: Znojil, M.
- title: PT-symmetric Quantum Chain Models
- date: 2007-01-02
- words: 5013
- flesch: 68
- summary: so that its secular equation � � � � � � � � � �s b a s b a b a b2 2 2 2 2 4 2 220 2 2 64 16 32 2 0( ) (12) is solvable in closed and compact form again, E a b a a b� � � � � � � � �1 2 2 2 4 210 36 12 36 E a b a a b� � � � � � � � �2 2 2 2 4 210 36 12 36 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 11 Acta Polytechnica Vol. † ( ),� � �� � � � � � � � � � � � � � � � � 1 0 0 1 0 0 1 0 0 1 � � � � � � � � � � � .
- keywords: b b; b c; case; certain; closed; condition; coupling; czech; dimensional; domain �; eep; eep eep; energies; equation; exceptional; form; hermitian; hermiticity; lett; math; matrix; mechanics; metric �; model; n n; non; operators; phys; physical; polynomial; problem; quantum; quasi; real; secular; solution; space; vol; znojil; � -symmetric; � -symmetry; � �
- versions: original; plain text
- ap-920
- author: Balková, L’.
- title: Return Words and Recurrence Function of a Class of Infinite Words
- date: 2007-01-02
- words: 5306
- flesch: 78
- summary: For Sb b( )( , )1 0 1 00 1� , one has Ret( ) ,( ) ( )00 1 0 10 0 10 101 1 1 1b b a b b b a b� � � � � � � . n1 0 11 1 0 0( ) ( )( , ) ( , )� � � , n � �, l k n( ) ( )� � 00101 for S k Sn n0 1 1 10 0 1 1( ) ( )( , ) ( , )� �� � , n � �. c)
- keywords: b b; bispecial; factor; function; infinite; left; length; n b; proposition; r n; recurrence; return; right; set; singular; substitution; u u; words; � �
- versions: original; plain text
- ap-922
- author: Sergyeyev, A.
- title: Flat Coordinates and Hidden Symmetry for Superintegrable Benenti Systems
- date: 2007-01-02
- words: 376
- flesch: 61
- summary: 47 No. 2–3/2007 Flat Coordinates and Hidden Symmetry for Superintegrable Benenti Systems A. Sergyeyev In this talk I present the results from my paper Exact solvability of superintegrable Benenti systems, J. Math. [2] Błaszak, M., Sergyeyev, A.: Maximal Superintegrability of Benenti Systems, J. Phys.
- keywords: benenti; class; phys; systems
- versions: original; plain text
- ap-923
- author: Matoušek, V.
- title: Effect of the Hydraulic Characteristics of a Stream Channel and its Surroundings on the Runoff Hydrograph
- date: 2008-01-01
- words: 9196
- flesch: 63
- summary: Fig. 4 compares the hydrographs in our two channels for rainfalls of a certain periodicity (50 years) and durations cor- responding with the concentration times, i.e. for rainfalls with durations of 35 minutes (reclaimed channel) and 55 minutes (natural channel). The paper proposes a methodology for evaluating the flood waves produced by different (either re- claimed or natural/restored) stream channels.
- keywords: area; channel; coefficient; concentration; concentration time; creek; czech; depth; direct; discharge; dubanka; duration; effect; event; fig; flood; flood event; flood wave; floodplain; flow; flow rate; high; hydraulic; hydrograph; isochrones; lake; maize; maximum; maximum flow; method; minutes; natural channel; outflow; outflow profile; precipitation; profile; rainfall; rate; reclaimed; rozhovice; runoff; slope; smooth channel; stream channel; table; time; valley; value; velocity; volume; water; watershed; wave
- versions: original; plain text
- ap-924
- author: Masáková, Z.; Pelantová, E.
- title: Self-Matching Properties of Beatty Sequences
- date: 2007-01-02
- words: 3154
- flesch: 82
- summary: Since �� is a quadratic unit, � �� �� is a ring and, moreover, it satisfies � � � �� � � �� � �� � (6) A cut-and-project set is the set of projections of points of � 2 to V1, that are found in a strip of given bounded width, parallel to the straight line V1. For the de- scription of the projection of �2 on V1 it suffices to consider the set � � � �� �� � � �� �: ,a b a b The integral basis of this free abelian group is ( , )1 �� , and thus every element x of � �� �� has a unique expression in this base.
- keywords: beatty; czech; fibonacci; frequency; irrational; j g; j j; j k; k g; k �; matching; math; project; proof; properties; quadratic; self; sequences; set; theorem; vol; � j
- versions: original; plain text
- ap-926
- author: Burdík, Č.; Navrátil, O.; Pošta, S.
- title: Structure of the Enveloping Algebras
- date: 2007-01-02
- words: 5901
- flesch: 60
- summary: f x x f x E x x f x x f x x � � � � � � � 23 34 33 13 11 33 31 12 32 1 0� � � � , ( ) 3 33 14 34 13 11 23 21 43 41 0 � � � � � � � � � � f x x f x x f x x f x x f x � � � � , E x f x x x f x x f x x f x24 21 41 22 44 42 23 43 24 44 � � � � � � � � � � � ( ) x f x x f x x f x E x x f x 14 12 24 22 34 32 14 11 44 4 0 � � � � � � � � � � � � � , ( ) 1 12 42 13 43 14 44 14 11 24 2 � �x f x x f x x f x x f x x f x � � � � � � � � � � 1 34 31 0� �x f x � � . U U U U E U U U E U C U 0 1 12 0 2 12 2 1 1 1� � � � � � � � � � ( ) , ( ) , ( ) ( ) , � From this we can claim that for any n � 0 U U C En k m k m n k m� � � , ( ) 0 2 1 12� (1)
- keywords: algebra; case; czech; decomposition; degree; det; dimension; e e; elements; enveloping; f e; highest; k k; k n; k �; lie; linear; n f; n n; n �; representation; sum; system; vectors; weight; x n
- versions: original; plain text
- ap-928
- author: Shapiro, B.; Tater, M.
- title: Root Asymptotics of Spectral Polynomials
- date: 2007-01-02
- words: 2378
- flesch: 71
- summary: We change the variable x t2 � and reduce the Schrödinger equation to 4 4 2 2 4 2 0 2 2 2t f t t bt f t Jt E b f d d d d � � � � � � �( ) ( ) (1) j i jj l � � � � � � �� � � � � �dd d d 2 2 1 11 0 (2) with �1<�2<… �l real and �1, …, �l positive.
- keywords: degenerate; degree; equation; higher; lim; n l; n n; non; operator; polynomials; problem; roots; schrödinger; spectral; stieltjes; van; vleck; vol
- versions: original; plain text
- ap-930
- author: Jones, H. F.
- title: The Metric Operator and the Functional Integral Formulation of Pseudo-Hermitian Quantum Mechanics
- date: 2007-01-02
- words: 3759
- flesch: 78
- summary: The operator � � �e Q is in fact precisely the metric opera- tor occurring in � � � � �, ,A A� , (7) because the similarity transformation � � �A A� � 1, � �� � � gives � � � � �� � � � � � � �A A† 1 . P2 1 2( , ) ( )� � , giving p F x P X F P x iQ� � � � � � � � � � 2 2 1 2 .
- keywords: case; cosh �; exp �; functional; hermitian; integral; iq �; j �; mechanics; metric; non; observable �; operator; phys; pseudo; quantum; theory; vol; � -symmetry; � sinh; � �
- versions: original; plain text
- ap-931
- author: Haluzová, P.
- title: Effective Data Mining for a Transportation Information System
- date: 2008-01-01
- words: 4334
- flesch: 59
- summary: LnNo number line number PorNo number line order EvCislo text tram-car license number Vozovna number number of the depot (1–8), from which the tram departed A number ID of tram stop B number number of the stop post C number delay (overtake recorded as minus) D number reserve column, without data Table 2: Attributes of daytime traffic tables name of attribute Meaning name of category values of attributes weekday days in a week Monday to Sunday 1 to 7 hour hour interval (e.g. 7 means an interval from 7:00 to 7:59) morning 5, 6 morning rush hour 7, 8 before noon 9, 10 noon 11, 12 afternoon 13, 14 afternoon rush hour 15, 16 evening 17, 18, 19, 20 late evening 21, 22, 23 average delay average delay [s] under 1 min �0, 59� from 1 to 2 min �60, 119� from 2 to 3 min �120, 179� over 3 min > 179 Table 3: Meaning and categories of attributes for each month, generates about 20 000 duplicate records, this corresponds to 1.3 % of the total. 48 No. 1/2008 Effective Data Mining for a Transportation Information System P. Haluzová This paper describes the application of data mining methods in the database of the DORIS transportation information system, currently used by the Prague Public Transit Company.
- keywords: accidents; analysis; antecedent; association; attributes; average; conclusion; contingent; czech; data; database; day; delay; example; fig; high; hour; hypotheses; implication; information; kdd; knowledge; line; lisp; methods; miner; mining; new; number; objects; parameters; prague; precondition; preparation; process; quantifier; records; rules; stop; succedent; system; table; technical; time; tram; university; values; vol
- versions: original; plain text
- ap-932
- author: Lévai, G.
- title: PT-symmetry and Non-Central Potentials
- date: 2007-01-02
- words: 2709
- flesch: 64
- summary: In what follows we choose the units as 2 1m � �� . Equation (5) is solvable for the choice Q( ) sin ( )� � �� �2 2 , q � �� �( )1 , (7) when the solutions are given by the associated Legendre func- tions � P� � �cos( ) [5].
- keywords: angular; case; central; complex; dimensions; energy; equation; non; norm; phys; potentials; problems; pseudo; quantum; radial; real; schrödinger; solvable; symmetry; variables; vol; � -symmetric; � �
- versions: original; plain text
- ap-934
- author: Fring, A.
- title: PT-symmetry and Integrability
- date: 2007-01-02
- words: 4990
- flesch: 73
- summary: Utilizing now both relations in (15) and the anti-linear nature of the ��-operator, a very simple argument leads to the reality of the spectrum � � � �� � � � � � �� � � � � �H H H�� �� �� ��* * (16) i � � � � � � � � � � † † † † † ( ) ~ ( )( i j ij i a � � � � � � � � � � � �� � ) (1) with a a i i � � †, being standard creation and annihilation ope- rators and �, , ~g g � �, possess a real eigenvalue spectrum [3] (I am grateful to John Cardy for pointing this out).
- keywords: calogero; czech; eigenvalue; equation; field; form; fring; g �; generic �; hamiltonians; hermitian; hermiticity; instance; integrability; integrable; isospectral; j. phys; mechanics; models; new; non; operators; phys; physics; potentials; pseudo; quantum; real; reality; rev; simple; spectrum; supersymmetry; theory; university; vol; � -symmetric; � -symmetry; � bk; � �
- versions: original; plain text
- ap-935
- author: Beran, V.; Hromada, E.
- title: Dynamic Simulations in Cost and Time Estimation of the Construction Process
- date: 2008-01-01
- words: 2819
- flesch: 61
- summary: pi i ij� � � . i C project const� � � � .
- keywords: activities; activity; bar; basis; building; calculation; chart; construction; cost; czech; data; duration; dynamic; example; fig; input; model; parameters; particular; probability; production; progress; project; rate; risk; schedule; scope; simulation; table; technical; time; university; work
- versions: original; plain text
- ap-936
- author: Bíla, H.
- title: How Do Energies Complexify?
- date: 2007-01-02
- words: 5721
- flesch: 64
- summary: The domain of the Hamiltonian (16) is � �DomH � � � �� �L L L L2 2 2 2( ) ( ) ( ) ( )� � � � . 2.2 Square-root dependence To illustrate the behaviour of eigenvalues on a concrete example, let us consider the simple two-dimensional matrices H � � � � � � � � � � �� c de de c iq iq 1 2 (11) with c d qi, , �. (8) The eigenvalues are given by 2 41 2 1 2 2 2E c c c c d� � � � �( ) .
- keywords: -symmetry; boundary; c c; case; complexification; czech; dependence; diagonalisable; dimensional; dirac; eigenvalues; energies; energy; equation; example; exceptional; form; hamiltonian; hermitian; level; matrices; matrix; max; non; operator; parameters; parametric; physical; points; properties; quantum; r �; real; relativistic; root; second; space; spectrum; square; systems; vol; zero; � -symmetric; � �
- versions: original; plain text
- ap-938
- author: Borisov, D.
- title: On a Quantum Waveguide with a Small PT-symmetric Perturbation
- date: 2007-01-02
- words: 1689
- flesch: 73
- summary: d d1 1 1 � � � � �� � � � � �� � � � �� 1 2 � It follows from [2, Th. 1] that if Re k1 0� , or Re k1 0� , Re k2 0� , (7) there exists the unique eigenvalue of �� converging to the threshold of the continuous spectrum, and the asymptotics of this eigenvalue reads as follows � � � �� � �� � � � 1 0 2 1 2 2 3k k k k, ( ),� . The main property of the operator �� is ��-symmetricity expressed by the identity � �� � * � �� � 1, where ( )( ) ( , )�u x u x x� � 1 2 .
- keywords: continuous; eigenvalue; operator; perturbation; spectrum; threshold; u x; � -symmetric
- versions: original; plain text
- ap-940
- author: Kochan, D.
- title: Quantization of Equations of Motion
- date: 2007-01-02
- words: 6083
- flesch: 68
- summary: Using it, for any other � within this class we get an oriented loop (cycle): � � � � �� : � � � �1 0class . All of these procedures require in some sense Lagrangian � � �� � and/or Hamiltonian � � �� � functions, such that �� ( , �, )x x x t x x i i
- keywords: amplitude; bundle; ch �; classical; curve; differential; dynamics; equations; exp; extended; feynman; forces; form; functional; initial; integral; lagrange; lagrangian; mechanics; newton; path; physical; potential; probability; problem; q q; q t; quantization; quantum; space; surface; system; t t; tangent; term; time; tm �; transition; umb �; umbilical; university; v t; vol; � class; � �
- versions: original; plain text
- ap-942
- author: Ambrož, P.
- title: Matrices Associated to 3-Interval Exchange Transformation and their Spectra
- date: 2007-01-02
- words: 2346
- flesch: 76
- summary: If (1, �1, 1) is a left eigenvector of M associ- ated to � then we have the following dependence between rows of M, denoted by M M M1 2 3� � �, , ( , , ) ( , , )1 1 1 1 1 11 2 3� � � � � �� � �M M M M �� . (4) Using (4) we have � �� � � � � � � � � � � � � � � � � �det det ( , , ) M M M M M M M 1 2 3 1 1 3 1 1 1� 3� � � � � � � � , by subtracting the first and the third row from the second row and by factoring �� out from the second row we obtain � �� � � � � � � � � � � � � det ( , , ) M M 1 3 1 1 1 , which gives (2).
- keywords: det; det m; et �; left; m m; matrices; matrix; mem �; meme; property; � �
- versions: original; plain text
- ap-943
- author: Prajzler, V.; Burian, Z.; Jeřábek, V.; Hüttel, I.; Špirková, J.; Gurovič, J.; Oswald, J.; Zavadil, J.; Peřina, V.
- title: Properties of Erbium Doped Hydrogenated Amorphous Carbon Layers Fabricated by Sputtering and Plasma Assisted Chemical Vapor Deposition
- date: 2008-01-01
- words: 3525
- flesch: 59
- summary: Keywords: carbon layers, Erbium, PACVD, sputtering, photoluminescence � PACVD growth of carbon thin films from a gas mixture ( H 2� Ar � erbium isopropoxide or CH4� Erbium tris), � magnetron sputtering placing metallic erbium on the car- bon target. Research on the deposition of carbon layers is mainly focused on the fabrication of dia- mond-like carbon (DLC) or carbon nanotubes.
- keywords: carbon; carbon layers; ch4; chemical; czech; deposition; er3; erbium; fig; films; growth; hüttel; ions; layers; magnetron; mail; optical; pacvd; photoluminescence; prague; samples; sputtering; table; target; technical; temperature; thin; tris; university; vacuum; vol
- versions: original; plain text
- ap-944
- author: Jakubský, V.
- title: Pseudo-Hermitian Operators in a Description of Physical Systems
- date: 2007-01-02
- words: 3283
- flesch: 65
- summary: denotes standard scalar product and �� �� � dp p p and �h is the helicity operator. The Hamiltonian of the system plays the role of the gener- ator of time translations, we have U t iHt( ) exp( )� � .
- keywords: construction; czech; description; equation; evolution; explicit; form; hamiltonian; hermitian; mechanics; metric; non; operator; phys; physical; positive; product; properties; pseudo; quantum; real; relativistic; respect; scalar; space; spectrum; spin; system; time; vol; znojil; � �
- versions: original; plain text
- ap-946
- author: Günther, U.; Kirillov, O. N.; Samsonov, B. F.; Stefani, F.
- title: The Spherically Symmetric a2–dynamo and Some of its Spectral Peculiarities
- date: 2007-01-02
- words: 4914
- flesch: 68
- summary: Two given branches � ��n ( )0 and � � � m( )0 intersect at the single point � � �� � � � � � � � � � � � � 0 0 0: , :n m n m, and we obtain that branches from states of opposite Krein space type � �� � intersect for � 0 0� , whereas states of the same type (� �� ) intersect at � 0 0� . 3: The spectral mesh of the operator matrix A� for l � 0 (a); its resonant deformation due to harmonic perturbations of a con- stant �-profile (b), (c); the formation of overcritical oscillatory dynamo regimes for � increasing from � � �0 0( )� to � � � � �35 0 0( ,� � for some branches) (d); and the resonant unfolding of DPs in the complex plane (e), (f).
- keywords: -symmetric; acta; bcs; behavior; branches; complex; conducting; czech; diabolical; dynamo; eigenvalue; equation; field; fig; günther; house; http://ctn.cvut.cz/ap/; krein; lett; magnetic; math; mechanics; mhd �; mode; models; new; operator; order; parameter; phys; points; polytechnica; potential; problem; publishing; quantum; real; related; space; spectral; spectrum; stefani; technical; terms; theory; type; university; vol; � -profile; � �
- versions: original; plain text
- ap-948
- author: Hosten, P.; Asbach, M.
- title: Detection of Facial Features in Scale-Space
- date: 2007-01-04
- words: 3134
- flesch: 62
- summary: This detector is based on the second moment matrix [7]: �( , , ) ( ) ( , ) ( , ) ( , ) x x x x � � � � � � � i D D i D D x y D x y D g L L L L L L � �2 2 D D 2 ( , )x � � � � � � (3) is easier to compute the trace and the determinant of the sec- ond moment matrix than its eigenvalues, the Harris detector uses the following measure to determine the location of inter- est points [3]: cornerness tracei D � � � � � � � � � � � � � 1 2 1 2 2 2 ( ) det( ( , , )) (� x �( , , ))
- keywords: analysis; classifier; cluster; computer; corner; detection; detector; dimensionality; face; facial; false; features; fig; harris; image; interest; invariant; local; matrix; number; points; recognition; results; rotation; scale; section; set; space; target; test; training; university; vectors; vision; vol
- versions: original; plain text
- ap-949
- author: Bičík, A.
- title: Moderna arhitektura u hrvatskoj 1930–IH –Modern Architecture in Croatia 1930’s by Darja Radović Mahečić
- date: 2008-01-01
- words: 1705
- flesch: 49
- summary: 48 No. 1/2008 Moderna arhitektura u hrvatskoj 1930–IH Modern Architecture in Croatia 1930’s by Darja Radović Mahečić A. Bičík Keywords: Croatian modern architecture, functionalism, functionalism in Croatia Book jacket REVIEW buildings are on the list, because they are important for the development of modern architecture in Croatia. In the course of the project a na- tional register of Croatian modern architecture from the pe- riod between 1926 and 1940 was set up.
- keywords: architects; architecture; art; author; book; buildings; competitions; croatian; croatian modern; czech; development; houses; important; index; institute; international; ivan; modern; modern architecture; period; polytechnica; prague; project; public; publishing; register; school; split; technical; town; university; vol; workers; zagreb
- versions: original; plain text
- ap-950
- author: Karajica, M.
- title: Valuating the Investment Efficiency of Distribution Companies
- date: 2007-01-04
- words: 4126
- flesch: 57
- summary: � Multi Criteria Decision Making methods, � Data Analysis Envelopment. The mathematical formulation for this exercise is: max h u y v x k j jk j s i ik i r0 0 0 1 1 � � � � � subject to u y v x k k n j jk j s i ik i r � � � � � � 1 1 01 1, , , , , ,� � u j s v i r j i � � � � 0 1 0 1 , , , , , , , , � � where hk0 is efficiency rate of unit k0, xik is i-th input the k-th unit, yjk is j-th output the k-th unit, vi are the weights assigned to the i-th input and uj are weights assigned to j-th output, while i r� 1, ,� , j s� 1, ,� and k k n� 1 0, , , ,� � .
- keywords: analysis; assessment; average; benchmarking; ccr; companies; company; comparison; constant; criteria; czech; czk; data; decision; distribution; e n; efficiency; envelopment; indicator; inputs; investment; line; making; methods; model; multi; number; order; outputs; publishing; relative; results; returns; scale; score; set; total; unit; university; valuation; value; weights
- versions: original; plain text
- ap-951
- author: Olshanetsky, M.
- title: Lectures on Classical Integrable Systems and Gauge Field Theories
- date: 2008-01-02
- words: 18027
- flesch: 81
- summary: Any H C� �( )� defines a Hamiltonian vector field on � � �H dH H Ha ab b� � �� � � � , . F Ga ab b, � �� � � � .
- keywords: 5.2 �; acta; action; arxiv; ay �; b �; basis; bundles; calogero; case; classical; complex; constraints; coordinates; corresponding; curve �; czech; df �; dim �; dimensional; duality; elliptic; equations; false; field; form; g g; g n; gauge; group �; hamiltonian; hecke; higgs; hitchin; holomorphic; house; http://ctn.cvut.cz/ap/; integrable; ix �; j g; j j; j k; j1 �; jk �; k �; lax; lie; map; marked; math; matrices; matrix; mills; modification; moduli; moment; monodromies; moser; motion; n d; n j; n n; n �; orbit; phase; phys; points; poisson; polytechnica; publishing; quotient �; red �; reduced; reduction; respect; section; solutions; space; spectral; stable; structure; subgroup �; symplectic; systems; t n; tc �; technical; theories; theory; tn �; tori �; transformations; true; un �; university; v �; variables; vector; vn1 �; vol; way; words �; xa �; y �; yang; z z; z �; � +; � ad; � cm; � dy; � et; � fl; � g; � h; � j; � l; � nz; � s; � u; � �
- versions: original; plain text
- ap-952
- author: Lisník, J.
- title: Valuation of Companies
- date: 2007-01-04
- words: 2098
- flesch: 63
- summary: FCFF EBIT t DEP WC INVt t t t t� � � � � �( )1 � (5) FCFFt – free cash flow to the firm, EBITt – earnings before interest and taxes, t – taxes, DEPt – depreciation, �WCt – change in working capital, INVt – investments. I selected the following six telecommunications operators [1]: � OTE (Greek), � Czech Telecom (CT) (Czech), � Swisscom (Swiss), � Telekom Austria (TA) (Austrian), � Telenor (Norwegian), � TeliaSonera (TS) (Swedish-Finnish).
- keywords: altman; assets; bankruptcy; companies; company; czech; czk; earnings; financial; groups; indicators; market; methods; number; ote; prague; price; score; share; stock; swisscom; telenor; teliasonera; valuation; value; year
- versions: original; plain text
- ap-954
- author: Petrucha, V.
- title: An Improved Version of the Fluxgate Compass Module
- date: 2007-01-04
- words: 2738
- flesch: 59
- summary: This differ- ence in sensor excitation coil distribution has a considerable impact on the sensor properties. Three types of sensors are typically used for geomagnetic field sensing.
- keywords: accelerometers; algorithm; axis; azimuth; calibration; case; coil; compass; compensation; current; czech; electronics; error; excitation; field; fig; fluxgate; iteration; linearity; magnetic; magnetometer; module; navigation; new; non; output; pcb; power; sensors; software; system; technical; temperature; total; type; university; value; version; vol
- versions: original; plain text
- ap-955
- author: Stolin, A.
- title: 25 Years of Quantum Groups: from Definition to Classification
- date: 2008-01-02
- words: 4236
- flesch: 67
- summary: Set � � �� I I� �, where � �I � is an orthonormal basis of g with respect to the Killing form. Let F satisfy F id F F id F12 23( ) ( )� �� � � .
- keywords: adobe; algebras; baxter; bialgebra; case; classical; classification; conjecture; corresponding; cybe; equation; false; following; groups; hopf; k k; lie; lie bialgebra; limit; math; matrix; p u; poisson; polynomial; quantization; quantum; quasi; rational; solutions; stolin; structures; true; twists; u u; u v; vol; yang
- versions: original; plain text
- ap-956
- author: Stojanovic, A.; Unger, M.
- title: Robust Detection of Point Correspondences in Stereo Images
- date: 2007-01-04
- words: 4700
- flesch: 63
- summary: where h l l l l l x l l l 1 1 11 2 21 3 31 2 12 3 13 2 22 1 12 1 2 2 � � � � � � � � � � � � � � � � � �21 3 23 3 32� �l l y , h l l l l l x l l l � � � � � � � � 2 2 1 11 2 21 3 31 2 12 3 13 3 33 1 13 1 � � � � � � � � 31 2 23 2 32� �l l z � � . Using the relations from equation (12) and the constraint that the point is on the line m, we ob- tain the set of equations: x f a y f b y f b z f c ax by cz � � � � � � � � � 1 1 1 1 0 � � � � � � � � . , (13) Expanding equation (13) we have the set of equations a b c x y x y 2 211 12 21 12 21 22 13 � � � � � � � � � � � � � � � � � � � � � � � 31 23 32 1x y h� � � � � � �� � , a b c x y x z 2 11 13 31 12 21 22 32 1 � � � � � � � � � � � � � � � � � � � � � � � 3 31 332 2 � � � � � � � � � x z h , ax by cz� � � 0 .
- keywords: band; correspondences; corresponding; covariance; criterion; distance; epipolar; epipolar line; estimated; fig; fundamental; geometry; hyperbola; image; l l; line; matrix; minimal; new; outlier; point; probability; second; set; university; value
- versions: original; plain text
- ap-958
- author: Blanik, N.; Hülsbusch, M.; Herzog, M.; Blazek, C. R.
- title: Assessment of Human Hemodynamics under Hyper- and Microgravity: Results of two Aachen University Parabolic Flight Experiments
- date: 2007-01-04
- words: 1749
- flesch: 60
- summary: 47 No. 4–5/2007 Fig. 7: Different kinetics of blood volume shifts of three sub- jects (measuring points on the forehead using a green (1) and an infrared light source (2), normalized at start of measurement) Fig. 8: Statistical analysis of skin blood volume changes measured with PPG sensors on subjects’ foreheads Acknowledgments To research these dynamic behaviors, the subjects were exposed to a rapid change of gravity (between zero and 1.8 times the normal gravitational force on earth, i.e. 0 g and 1.8 g, respectively) on parabolic flights.
- keywords: blazek; blood; body; earth; fig; flights; flow; fluid; gravitational; gravity; human; intensity; legs; light; lower; microgravity; parabola; parabolic; photoplethysmography; plane; ppg; seconds; sensor; shifts; skin; space; subjects; time; university; volume
- versions: original; plain text
- ap-959
- author: Smirnov, F.
- title: Correlation Functions for Lattice Integrable Models
- date: 2008-01-02
- words: 7411
- flesch: 76
- summary: Consider the infinite XXZ spin chain with the Hamiltonian H k k k k k k k XXZ � � � �� � � ��� � �12 1 1 1 1 2 1 2 3 1 3( ( ))� � � � � �� , where � a a( , , )�1 2 3 are Pauli matrices and � � cos ��. I shall consider the case � �1, so, � is real: 0 1� �� . [ , ] ( ) ( ) ,L L m n L n nm n m n m n� � � �� � 1 12 12 � , [ , ] ( ) ( ) ,L L m n L n nm n m n m n� � � �� � 1 12 12 � .
- keywords: adobe; algebra; boos; case; chain; denote; expectation; false; fermion; formula; free; functions; hamiltonian; j j; j k; j �; jimbo; k k; k l; k �; lecture; lenght �; local �; m �; matrix; miwa; model; n n; operators; q q; relation; sin; smirnov; space; spin; takeyama; true; vac; vacuum; vol; w �; xxz; � e; � n; � p)-th; � y; � �
- versions: original; plain text
- ap-960
- author: Eros, L.; Bozoki, F.
- title: Refactorisation methods for TTCN-3
- date: 2007-01-04
- words: 3377
- flesch: 65
- summary: 47 No. 4–5/2007 Refactorisation methods for TTCN-3 L. Eros, F. Bozoki In this paper we introduce automatic methods for restructuring source codes written in test description languages. The goal of our refactorisation methods is to increase the maintainability of source codes.
- keywords: action; algorithm; cefsm; code; data; definitions; equal; fig; graph; instructions; lists; model; module; node; redundancy; refactoring; refactorisation; repetitions; repetitive; sequences; source; states; structure; templates; test; trees; ttcn-3; type; value
- versions: original; plain text
- ap-961
- author: Sitarz, A.
- title: 31Lectures on Noncommutative Geometry
- date: 2008-01-02
- words: 20476
- flesch: 69
- summary: �� � � denotes the usual coor- dinates on the torus. Example 2.9: Take U, V to be the following unitary operators on the Hilbert space with basis { }, ,em n m n��: U e em n m n, ,� 1 , V e e em n i m m n, ,� � 2 1 � � , m n, � �, where � � � .
- keywords: 2/2008; acta; action; algebra; algebraic; basis; bundle; calculus; case; circle; classes; classical; cocycle; cohomology; commutators; compact; complex; connection; connes; construction; continuous; cos; course; curvature; cyclic; czech; definition; dga; differential; differential algebra; dimension; dirac; e �; elements; example; exercise; f f; f n; fact; false; field; finite; following; forms; free; functions; gauge; geometry; gh �; good; graded; hilbert; house; http://ctn.cvut.cz/ap/; ideal; ii �; instance; j2 �; k �; left; leibniz; linear; manifold; map; mathematical; matrix; means; model; module; morphism �; n k; n m; n n; need; noncommutative; noncommutative geometry; notion; number �; operator; order; pairing; physics; points; polytechnica; product; projective; proof; publishing; quantum; representation; rham; rule; s �; set; sin; smooth; space; spectral; standard; t �; technical; tensor; theorem; theory; topological; topology; torus; trace; triple; true; u u; universal; university; vector; vol; vui �; way; work; � -independent; � b; � f; � ker; � p; � xi; � �
- versions: original; plain text
- ap-962
- author: Havlíček, L.
- title: Extending the Life Time of a Nuclear Power Plant: Impact on Nuclear Liabilities in the Czech Republic
- date: 2007-01-04
- words: 4044
- flesch: 48
- summary: Unlike the disposal and decommissioning liability there is no obvious relation between NPP life time (waste volume produced) and liability. This paper deals with the impact of NPP life time extension (alternatively NPP power up-rate or construction of a new NPP) on individual nuclear liabilities in the conditions of the Czech Republic.
- keywords: additional; basic; changes; costs; current; czech; decommissioning; disposal; dukovany; estimate; extension; fuel; funds; future; impact; liabilities; liability; life; life time; new; npp; npp operator; nuclear; operation; operator; options; rate; repository; republic; state; storage; technology; time; waste; years
- versions: original; plain text
- ap-964
- author: Lucki, M.
- title: Negative Chromatic Dispersion Generated by Introducing Curvature into Photonic Crystal Fiber
- date: 2007-01-04
- words: 4134
- flesch: 59
- summary: To simplify the definition, we decompose the supermodes into elementary modes (or inversely) in a cross-section as: � � �I I Ib b� �1 1 2 2, (5) � � �II II IIb b� �1 1 2 2. The sensitivity of minimum negative CD to deviations of the curvature radius or with respect to the normalized hole diameter During the fabrication process, the predicted values of the hole diameter or the curvature radius could have some devia- tions from the theoretical predictions.
- keywords: bending; bent; chromatic; cladding; core; coupling; curvature; deviation; diameter; dispersion; dual; effective; fiber; fig; fundamental; hole; index; losses; minimum; mode; negative; negative cd; optical; orientation; pcf; peak; photonic; plane; positive; radius; supermodes; value; vol; wavelength; � �
- versions: original; plain text
- ap-965
- author: Toppan, F.
- title: Extended Supersymmetries in One Dimension
- date: 2008-01-02
- words: 16264
- flesch: 67
- summary: i i i� � � � � � � � � �5 1 1 2 3 3 4 4 2 6� � � � � (9.69) ii) i � � � � � � � � � � � � � 4 2 1 4 5 5 2 8 3 1 1 4 3 3 � � � � � � � � � � � � � � � � � � � � � � � � � � 4 2 5 5 8 4 1 2 3 3 4 4 2 6 � � � � � � � � i i
- keywords: 2/2008; acta; action; algebras; bosonic; c(0; case; classification; clifford; connectivity �; constant �; construction; content; czech; d �; derivative �; dimensional; dimensionality; dressed; dressing; entries; extended; false; fermionic; fields; following; gamma; general; house; http://ctn.cvut.cz/ap/; ii �; ijk; invariant; irreducible; irreps; k �; length; length-4; lines; matrices; matrix; maximal; mechanics; mod; multiplet; n n; n �; non; nrr �; number; octonionic; operators; phys; polytechnica; publishing; q n; q q; quantum; representations; results; s �; section; set; shell; space; spin; supergravity; supersymmetry; technical; terms; theories; theory; time; total; transformations; true; type; university; vol; weyl; � dt; � fusion; � g; � ijklmnp; � j; � y; � �
- versions: original; plain text
- ap-966
- author: Szabados, R.; Sipos, K.
- title: Developing E-learning Courses for Mobile Devices
- date: 2007-01-04
- words: 6070
- flesch: 60
- summary: Probably the most important problem is adequate adaptation of video files to the given platform. Due to the large number of different video codecs, there are numerous ways for video adaptation.
- keywords: adaptation; available; bandwidth; capacity; case; cms; code; coding; content; course; devices; different; display; enhancement; file; html; internet; learning; learning package; lecturer; lms; method; mobile; moodle; multimedia; new; original; package; pages; pdas; picture; platform; playback; profile; program; quality; resolution; scalability; scalable; scorm; screen; server; size; small; software; storage; stream; structure; system; technical; text; university; user; video; way
- versions: original; plain text
- ap-968
- author: Švec, P.; Jandák, V.
- title: The Influence of PZT Actuators Positioning in Active Structural Acoustic Control
- date: 2007-01-04
- words: 2364
- flesch: 62
- summary: xi i j t k j t � � � � � � � � 4 2 2� � � � � � � �( ) ( ) ( ) x y x y x yd d � � � � , (1) where k is the wave number vector magnitude, kx, ky are its components in the x and y directions, �0 and c0 are air density and phase speed of sound respectively, Vz is the 2D k-space Fourier transform of the normal velocity of the vibrating surface, and � ( ) means the real part of its argument.
- keywords: active; actuator; antinode; asac; control; czech; effect; fig; force; mass; moment; pattern; piezoelectric; plate; position; power; radiated; radiation; secondary; sound; stripe; structural; system; technical; university; vibration; � �
- versions: original; plain text
- ap-970
- author: Tauchmanová, J.
- title: Computer Controlled Switching Device for Deep Brain Stimulation
- date: 2007-01-04
- words: 1852
- flesch: 60
- summary: Keywords: Deep brain stimulation, hemodynamic response, functional magnetic resonance, identification. The practical part deals with the design of a computer controlled switching device for an external stimulator for deep brain stimulation.
- keywords: brain; computer; control; czech; data; deep; device; fig; fmri; functional; hemodynamic; identification; investigation; localization; magnetic; model; patient; resonance; response; second; signals; stimulation; switching; symptoms; system; time; toolbox
- versions: original; plain text
- ap-971
- author: Pošta, P.
- title: Communication between a Matrix Converter Modulator and a Superset Regulator
- date: 2008-01-03
- words: 1805
- flesch: 64
- summary: Keywords: matrix converter, FPGA, VHDL, power electronics. Fig. 1: Matrix converter 3×3 4 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. The processes of four-step switching driven by input voltage are insinuated in tables Table 1.
- keywords: adc; algorithm; bus; communication; converter; desk; fig; fpga; input; matrix; measured; modulator; output; program; read; regulator; superset; switching; technical; testing; university; values; voltage
- versions: original; plain text
- ap-972
- author: Dietrich, P.
- title: Modeling Measurement Uncertainty in Room Acoustics
- date: 2007-01-04
- words: 2875
- flesch: 52
- summary: Keywords: Room acoustics, measurement uncertainty, GUM, ISO 3382, uncertainty modeling. The main influence factors and their relevance regarding measurement uncertainty have been analyzed and determined.
- keywords: acoustic; budget; clarity; contributions; different; dodecahedron; experiments; factors; fig; frequency; gum; impulse; index; input; iso; loudspeaker; measurement; modeling; output; parameters; position; quantities; quantity; response; results; room; seat; source; standard; technical; time; type; uncertainties; uncertainty; vol
- versions: original; plain text
- ap-973
- author: Aboelhassan, M.
- title: A Proportional Integral Derivative (PID) Feedback Control without a Subsidiary Speed Loop
- date: 2008-01-03
- words: 1850
- flesch: 58
- summary: 48 No. 3/2008 Fig. 2: Block diagram of the PID-controller without the subsidiary speed loop Fig. 3: Block diagram of the PD-controller without the subsidiary speed loop Fig. 4: Block diagrams: proportional control term 3.3 Parallel PID Controllers The family of PID controllers is constructed from various combinations of the proportional, integral and derivative terms as required to meet specific performance requirements. Other modifications that are introduced into the textbook form of PID control include those used to deal with so-called kick behavior, which arises because the textbook PID controller operates directly on the reference error signal.
- keywords: bldc; block; circle; controller; current; czech; derivative; diagram; domain; drives; error; feedback; fig; gain; loop; motors; pid; position; proportional; rotor; signal; speed; speed loop; state; subsidiary
- versions: original; plain text
- ap-974
- author: Aleksandrowicz, A.; Leonhardt, S.
- title: Wireless and Non-contact ECG Measurement System – the “Aachen SmartChair”
- date: 2007-01-04
- words: 2683
- flesch: 58
- summary: [4] introduced a so-called “driven-ground- -plane” circuit for non-contacting ECG measurements which was also implemented in the application presented here. Either an ICU patient monitor can be con- nected via D/A-conversion and magnitude adjustment, allowing standard ECG clamp leads to be applied, or a simple wired serial interface to a PC can be realized.
- keywords: aachen; amplifier; application; body; capacitive; chair; circuit; common; conductive; contact; coupling; data; driven; ecg; electrodes; fig; ground; input; insulated; kim; measurement; mode; monitor; patient; result; signal; skin; subject; surface; system; thickness; university; vol
- versions: original; plain text
- ap-976
- author: Novák, A.
- title: Identification of Nonlinear Systems: Volterra Series Simplification
- date: 2007-01-04
- words: 2258
- flesch: 68
- summary: x t x t1 2 2 1 2 1 1 2 2 1 2( ), ( ) ( , ) ( ) ( )� � � �� � � � � � � � � �d d � � � . [ ( )]� �Hn (1) in which Hn[ ( )] ( , , ) ( ) ( )x t h x t x tn n n n� � � �� � �� � �� � � �� � � � � �1 1 1d d� ( 2) represents n-dimensional convolution of the input signal x(t) and n-dimensional Volterra kernel hn(�1,..., �n).
- keywords: fig; input; kernel; linear; model; nonlinear; operator; order; output; response; second; system; volterra
- versions: original; plain text
- ap-977
- author: Čapek, R.
- title: Visualization and Simulation in Scheduling
- date: 2008-01-03
- words: 2236
- flesch: 55
- summary: Two areas of usage are considered: sim- ulation for monitoring the influence of scheduling on the system function (e.g. for digital filters), and time visualization (e.g. graphic represPentation of execution on a production line in time). On the other hand, Matlab includes the Virtual Reality toolbox, which is also a sufficient tool for visualization of scheduling results.
- keywords: application; block; chart; control; digital; environment; fig; function; gantt; hoist; input; matlab; output; problem; production; reality; representation; results; schedule; scheduling; scheme; simulation; simulink; system; tasks; time; toolbox; torsche; virtual; visis; visualization
- versions: original; plain text
- ap-978
- author: Tomek, J.
- title: Inductive Contactless Distance Measurement Intended for a Gastric Electrical Implant
- date: 2007-01-04
- words: 2789
- flesch: 57
- summary: 2 Methods The basic of distance measurement solutions using the mutual induction principle is to have just two single axial probes, one transmitter and one receiver. Magnetic measurements are unfortunately directionally dependent, so only the use of multi-axial probes and trans- mitters can ensure precise position evaluation.
- keywords: axial; certain; chen; coils; czech; dipole; distance; electronics; errors; fig; gastric; induction; low; magnetic; measurements; need; orientation; position; possible; power; probes; receiver; sensing; sensor; simple; stimulation; stomach; system; tracking; transmitter; use; vector; vol; wall
- versions: original; plain text
- ap-980
- author: Schotsch, B.; Vary, P.; Clevorn, T.
- title: Analysis of Mismatched First Order A Priori Information in Iterative Source-Channel Decoding
- date: 2007-01-04
- words: 4640
- flesch: 57
- summary: � �T R � 0 9 0 9 , the decoding trajectory reaches the intersection of the LDPC EXIT characteristic and the SOAK1(� � 0 9. ) � �T R � 0 9 0 9 decoding trajec- tory fall short of the SOAK1(� � 0 9. )
- keywords: assignments; autocorrelation; bit; case; channel; characteristic; charts; codes; correlation; decoder; decoding; design; exit; extrinsic; fig; frame; high; index; information; iscd; iterative; knowledge; ldpc; level; order; paper; parameter; performance; priori; quantizer; r �; receiver; redundancy; residual; results; sdsd; short; snr; soak1; source; systems; turbo; u u; values; � �
- versions: original; plain text
- ap-981
- author: Gross, S.; Stehle, T.
- title: RealTimeFrame – A Real Time Processing Framework for Medical Video Sequences
- date: 2008-01-03
- words: 3622
- flesch: 55
- summary: Chapter two lists the requirements for a real time software framework for medical image data processing. Keywords: Medical image processing, software framework, real time image processing, multithreading.
- keywords: acquisition; algorithms; buffer; chain; chapter; clinical; code; computer; control; controller; data; development; display; fig; files; framework; functionality; grabber; graphical; gui; hardware; image; image processing; imaging; information; interface; libraries; library; main; medical; medical image; model; modules; new; performance; platform; processing; program; realtimeframe; results; software; source; system; thread; university; user; video; view; vol
- versions: original; plain text
- ap-982
- author: Schneider, T. E.
- title: Automated Classification of Analysis- and Reference Cells for Cancer Diagnostics in Microscopic Images of Epithelial Cells from the Oral Mucosa
- date: 2007-01-04
- words: 3607
- flesch: 52
- summary: classifiers analysis cells reference cells overall rate kNN 92.4 98.5 95.5 F-kNN 93.9 97.5 95.7 SVM 2 92.9 98.5 95.7 SVM203 93.9 97.0 It can be seen that chromatin features provide a good separability perfor- mance, whereas only the geometrical features within the basic set morphology do not distinguish the two classes sufficiently.
- keywords: analysis; basic; best; cancer; cells; chromatin; classification; classifiers; different; distribution; dna; epithelial; extinction; feature; fig; fuzzy; green; image; knn; method; mucosa; nearest; nuclei; number; objective; oral; overall; rate; reference; results; selection; set; sets; specimens; svm2; table; training; university; validation; vol
- versions: original; plain text
- ap-984
- author: Luecken, H.; Tech, G.; Schwann, R.; Kappen, G.
- title: Stick Based Speckle Reduction for Real-Time Processing of OCT Images on an FPGA
- date: 2007-01-04
- words: 3530
- flesch: 60
- summary: Currently, resolutions down to a few micrometers are possible, allowing OCT images to compete with histological examina- tion of tissue. Additionally, post-processing algorithms (such as deconvolution or segmentation) that are used to enhance image resolution and quality may suffer from the presence of speckle in OCT images.
- keywords: algorithm; aluts; asf; block; coherence; cycles; data; different; digital; direction; fig; filter; fpga; frequency; high; image; implementation; interference; length; light; like; number; oct; optical; pattern; pixels; post; probe; processing; rate; real; reduction; reference; required; resolution; scan; section; serial; signal; size; speckle; stick; system; time; ultrasonic; university; value; vol; window
- versions: original; plain text
- ap-985
- author: Adamec, M.; Indráková, M.; Karajica, M.
- title: The European Electricity Market and Cross-Border Transmission
- date: 2008-01-03
- words: 3360
- flesch: 55
- summary: Due to the impossibility of storing electric power, its price is highly volatile on spot markets (Fig. 1.), and this forces in- vestors to use some form of hedging (risk management). 2.1 Ways of trading in electricity There are two main markets, in which electric power is traded.
- keywords: 3/2008; access; acta; auction; border; capacities; capacity; countries; cross; czech; dealing; electric; electric power; electricity; energy; etso; europe; european; exchange; fig; france; free; germany; house; http://ctn.cvut.cz/ap/; liquidity; market; method; necessary; polytechnica; power; price; publishing; rtpa; system; technical; total; trade; trading; transmission; twh; university; vol
- versions: original; plain text
- ap-986
- author: Mgaya, E. V.; Müller, Z.
- title: The Impact of Connecting Distributed Generation to the Distribution System
- date: 2007-01-04
- words: 3306
- flesch: 54
- summary: The disturbances are categorized according to the frequency (power systems, acoustic, radio). This paper will draw attention to the impacts of connecting wind power plants to the existing system.
- keywords: case; changes; circuit; compensation; connected; connection; control; current; czech; devices; distribution; electrical; energy; factor; fig; flicker; frequency; generators; harmonic; higher; level; line; load; losses; mva; network; pcc; plant; power; reactive; renewable; short; sources; study; system; technical; university; voltage; wind; wind power
- versions: original; plain text
- ap-988
- author: Vancl, J.
- title: Improved Evaluation of Planar Calibration Standards Using the TDR Preselection Method
- date: 2007-01-04
- words: 2544
- flesch: 48
- summary: [1] and statistical processing of mea- sured data of an over-determined set of calibration standards [2]-[5]. Another improved calibration procedure optimizes parameterized models of calibration standards to minimize nonreciprocity in a known asymmetrical reciprocal two-port device [6].
- keywords: accuracy; best; calibration; calibration standards; coefficient; combination; czech; data; error; feeding; fig; impedance; line; load; measured; measurement; method; open; parameters; preselection; procedure; reflection; response; shifted; short; standards; substrate; tdr; test; time; university; vna; vol
- versions: original; plain text
- ap-989
- author: Čundev, D.
- title: Analysis of the Fuel Efficiency of a Hybrid Electric Drive with an Electric Power Splitter
- date: 2008-01-03
- words: 2279
- flesch: 58
- summary: When simulating a of power drive system, is essential to calculate precisely the efficiency of each component where there is energy transformation. 7 Conclusions The results show the main specifications of this new concept of hybrid electric drive according to the European driving schedule.
- keywords: calculated; capacitor; car; consumption; drive; driving; eds; efficiency; electric; energy; engine; eps; fig; fuel; hev; hybrid; ice; main; power; prague; regime; results; schedule; stand; super; technical; time; traction; urban; vehicle; working
- versions: original; plain text
- ap-990
- author: Rajnoha, J.
- title: Speaker Non-speech Event Recognition with Standard Speech Datasets
- date: 2007-01-04
- words: 4219
- flesch: 61
- summary: In the non-speech event modelling task this calls for a sufficient number of non-speech events present in the database, which is the way to get a general description of the modelled event. To increase the number of non-speech events present in the training set of speech data, one other dataset was used.
- keywords: age; alignment; analysed; bre; classes; czech; database; dataset; different; distribution; environment; error; events; fig; forced; influence; information; items; marked; marks; models; noise; non; number; occurrence; original; phase; rate; recogniser; recognition; records; results; shows; speaker; speaker non; speech; speech events; spk; subsequent; subset; table; tem; training; transcription; university; word; work
- versions: original; plain text
- ap-991
- author: Havlíček, L.
- title: Nuclear Fuel Cycle Evaluation and Real Options
- date: 2008-01-03
- words: 3874
- flesch: 55
- summary: Keywords: Nuclear fuel cycle, front-end, back-end, economic evaluation, evaluation methods, NPV, uncertainty, flexibility, real options. cient only for a few years of operation. The most widely-used options are: � Option to wait or to defer a project � Option to expand or to contract a project � Option to abandon a project � Option to stage � Option to shutdown and restart � Option to switch 5 Applicability of the real option concept in nuclear fuel cycle 5.1 Applicability in the Front-End If an operator buys nuclear materials and services to be delivered just in time for the next stage of the processing chain, there is no room for flexibility.
- keywords: basic; core; costs; cycle; czech; decision; degree; economic; end; evaluation; flexibility; fresh; fuel; fuel cycle; future; long; npp; npv; nuclear; nuclear fuel; open; operation; operator; optimization; option; parameters; plant; power; price; procurement; radioactive; rate; reactivity; reactor; real; storage; technical; term; time; uncertainty; uranium; use; value; volatility; waste; year
- versions: original; plain text
- ap-992
- author: Matz, V.; Kreidl, M.; Šmíd, R.
- title: Signal Separation in Ultrasonic Non-Destructive Testing
- date: 2007-01-06
- words: 4368
- flesch: 60
- summary: It can be calculated by T k N k k( ) ( ) ( )� � � � 2 1 � � � , (3) where �(k) is the phase component of the discrete Fourier transform, k is the frequency index and N is the total number of points. In the past, many methods have been evaluated [2–5, 11] for efficient noise reduction in ultrasonic signals.
- keywords: algorithms; amplitude; analysis; blind; case; coefficients; czech; delay; discrete; dwt; echo; efficient; evaluation; fault; fig; filter; frequency; group; level; material; methods; mother; noise; noising; reduction; results; separation; signal; snre; source; structure; t t; technical; thresholding; transform; ultrasonic; university; vol; wavelet; wiener
- versions: original; plain text
- ap-994
- author: Xanthos, S.; Gong, M.; Andreopoulos, Y.
- title: Design and Validation of a Probe for Spatially and Temporally Resolved Measurements of Vorticity and Strain Rates in Compressible Turbulence Interactions
- date: 2007-01-06
- words: 4969
- flesch: 59
- summary: If the uncertain- ties in the measurements of U2 and U1 are the same, � � �U U U1 2 3� � , and lp is determined accurately, then the relative uncertainty � F F will be given by: � �F F U U U � � � � � � � � � � �� � � � �� 2 2 1 2 1 2 . These expressions can be written as: � U x U U t U U x U U x p x 1 1 1 1 2 1 2 3 1 3 1 1 1 � � � � � � � � � � , U x U U t U U x U U x p x U 2 1 1 2 2 2 2 3 2 3 2 1 1 � � � � � � � � � � � , 3 1 1 3 2 3 2 3 3 3 3 1 1 � x U U t U U x U U x p x � � � � � � � � � � .
- keywords: acta; agui; andreopoulos; boundary; briassulis; components; compressible; data; error; expansion; facility; field; fig; flow; fluid; gradients; grid; hot; interactions; locations; mass; mean; measurements; new; polytechnica; present; pressure; probe; rate; relative; resolution; section; shock; spatial; temperature; temporal; terms; time; total; tube; turbulence; u u; uncertainty; university; velocity; vol; vorticity; wall; waves; wire
- versions: original; plain text
- ap-995
- author: Kněžek, M.
- title: Power Producer Production Valuation
- date: 2008-01-03
- words: 2081
- flesch: 55
- summary: GM CHP GM CHP qS pS qG pG qP td td td td td td td td t _ _� � � � � � � � �� � d td td pP�� � , (2) where �pStd is the weighted value of the sales prices [Kč], �pGtd is the weighted value of the production prices [Kč], and �pPtd is the weighted value of the purchased prices [Kč]. GM CFP GM CFP qS pS qPG pPG qP td td td td td td td td _ _� � � � � � � � ��
- keywords: closed; day; difference; electricity; future; future position; historical; hour; management; market; open; planned; position; prices; production; purchase; risk; sales; td td; trading; value; volume
- versions: original; plain text
- ap-996
- author: Brůha, O.; Brůha, T.; Fořt, I.; Jahoda, M.
- title: Dynamics of the Flow Pattern in a Baffled Mixing Vessel with an Axial Impeller
- date: 2007-01-06
- words: 4999
- flesch: 62
- summary: The energy dissipation per unit mass � related to the experimental system used in this study is � � � � �� � �0 0 0 0 0 0 0 P m P m P V P V , ( ) (11) and after substitution V � 0.0192 m3, P0 � 10.3 W, V0 � 0.0109 m3 we obtain � � 1.384 m2 s�3. The kinetic energy of turbulence per unit of mass is q w w wz r� � � � � � � � � � � 1 2 2 2 2 � .
- keywords: 6/2007; acta; agitated; average; axial; baffles; blade; calculated; chemical; circulation; cycle; czech; diameter; dissipation; energy; engineering; experimental; fig; flow; formation; frequency; height; house; http://ctn.cvut.cz/ap/; impeller; liquid; loop; macro; mass; max; mean; pcl; polytechnica; power; primary; process; publishing; rate; region; rotor; stirred; system; technical; time; turbulent; university; value; velocity; vertical; vessel; vol; volume; wall
- versions: original; plain text
- ap-998
- author: Ficker, T.
- title: Dimension of Fracture Surfaces
- date: 2007-01-06
- words: 2703
- flesch: 68
- summary: Fortunately, the structure of a porous ma- terial often contains only one type of grain or – at least – one grain type of fractal arrangement (i � 1) dominates over the solid remainder (i � 0), which is usually of a non-fractal character (D D S0 03� � � * ) � � � � � � � � � � � � � � � � � � � � � � � � � 0 1 1 1 0 0 0 1 1l L b s S D k* ( ) exp , ln , *S D A s A L l k � � � � � � � � � � � � � � � � � � � � � � � � 1 0 1 1 1 � � � ( ) .b Since the publication of the basic work by Mandelbrot and his co-workers [1] many authors have tried to correlate the fractal dimensions of fracture surfaces with the mechanical properties of materials.
- keywords: balshin; case; cement; compressive; concr; czech; dimension; exponent; ficker; fractal; fracture; materials; non; paste; patterns; porosity; porous; sample; strength; structure; surface; universal; university; value; vol; volume; � �
- versions: original; plain text
- ap-999
- author: Frydryšková, J.
- title: UNRRA and Support for Science
- date: 2008-01-03
- words: 1252
- flesch: 50
- summary: Partici- pation in reconstruction was not a part of UNRRA activities, and there was no long-term cooperation in economic pro- grams and agreements. Scholarship hold- ers, who had been proposed by the government itself, were appointed as UNRRA experts when they returned home.
- keywords: countries; czechoslovakia; economic; experts; history; holders; important; latest; period; prague; program; recovery; rehabilitation; relief; renewal; scholarship; scientific; specialists; supplies; technical; university; unrra; war; world
- versions: original; plain text