ap: A Pathfinder

This is a computer-generated pathfinder created against the Distant Reader study called ap.

Each Distant Reader study carrel is composed of many individual items. Each item is bibliographically described with author, title, date, summary, and keyword values. Below is a list of the items' most signficant keywords as well as lists of the items themselves. Purpusing the content of this pathfinder provides the student, researcher, or scholar with one way to get their heads around the scope of the carrel. The keywords include:

Model; System; Temperature; Time; Energy; Data; Flow; Surface; Heat; Design; Pressure; Power; Process; Method; Concrete; Analysis; Water; Strength; Plasma; Control; Load; Air; Ray; Signal; Czech; Equation; Parameters; Gas; Material; Results; Laser; Image; Current; Simulation; Materials; Properties; Voltage; Matrix; Mass; Phase; Quantum; Phys; Space; Samples; Measurement; Stress; Steel; Beam; Transfer; State; Test; Field; Function; Algorithm; Cement; Value; Effect; Frequency; Fuel; Velocity; Network; Values; Engine; Engineering; Particle; Distribution; Density; Rate; Technical; Combustion; Moisture; Performance; Angle; Welding; Impeller; Solution; Strain; Layer; Blade; Point; Efficiency; Force; Structure; Body; Set; Fluid; Group; Theory; Radiation; Plate; Size; Level; Algebra; Light; Prague; Operator; Concentration; Speed; Element; Software; Deformation; Project; Fracture; Lie; Systems; Technology; Problem; Information; Alloy; Position; Physics; Case; Equations; Fire; Sky; Learning; Input; Flux; Carbon; Chamber; Line; Aircraft; Controller; Wing; Oil; Tunnel; Hamiltonian; Spectrum; Target; Error; Cell; Gamma; Functions; Accuracy; Doi:10.1016; Monitoring; Images; Transport; Star; Metal; Film; Agent; Training; Plant; States; Valve; Grbs; Background; Joint; Treatment; Steam; Fibre; Composite; Response; Layers; Wave; Coal; Models; Tree; Construction; Compression; Polynomials; Domain; Jet; Potential; Hermitian; Neutrino; Modulus; Risk; Telescope; Cluster; Management; Linear; Structures; Drying; Vehicle; Students; Heart; Representation; Conductivity; Total; Device; Action; Differential; Dispersion; Stars; Yield; Aluminium; Cycle; Glass; Price; Radio; Grb; Expansion; Concept; Plane; Fractal; Plastic; Range; Hilbert; Eigenvalues; Matter; Wheel; Parallel; Curve; Factor; Cloud; Root; Coatings; Binary; Pumping; Capillary; Higgs; Solder; Patient; Giovannelli; Electrodes; Barrier; Entropy; Joints; Probe; Program; Magnesium; Sequence; Cache; Pattern; Adobe; Gate; Lung; Ito; Tensor; Forming; Word; Interval; Words; Avalanches; Wireless; Atlas; Entanglement; Base; Variations; Vectors; Sandstone; Inertial; Correlator; Tobogganic; D(a; Ligo; Impellers; Propellers; Kepler; Hump; Polytechnica; Octaslide; V∗ext; Theorem; Šejnoha; Jeho; Dynamo

Depending on how this pathfinder was created, many of the bibliographic sections will include elaborations on the meaning(s) of the given keywords. These elaborations were generated by feeding the items' summaries to a large langauge model and asking the model to address the question, "What is X?", where "X" is the keyword. The result will be a few sentences of elaboration. Be forewarned. The elaborations are often plausible, but they should not be take as truth. Instead, they should be taken as points for consideration.

• Determination of mechanical properties of very thin 3D-printed specimens for numerical analysis of tensile strength and fracture toughness by Bočan, Petr; Jíra, Aleš (2025) - Figure 9 shows a schematic example of printing samples for botch print orientations. Experimental verification of the influence of thickness on 3D printed samples on fracture toughness parameters. Keywords: data; experiment; figure; fracture; material; model; modulus; numerical; properties; results; sample; strength; tensile
• Use of the thermo-hydraulic system code RELAP5/MOD3.2 to transient analysis events of the VR-1 reactor by Mátl, Jakub; Fejt, Filip (2025) - reactor model C – recirculation scheme – RELAP5. reactor model E – recirculation scheme – RELAP5. Keywords: coolant; core; figure; flow; model; power; reactor; relap5; scram; vr-1
• Vortices in the wake past adjustable car spoiler in open and closed configuration studied experimentally by PIV by Janský, Vojtěch; Hejda, Zdeněk; Duda, Daniel; Yanovych, Vitalii; Uruba, Václav (2025) - Vortex correlations Correlation of vortex parameters allows us to discover some coherent behaviour, if it exists. The correlation R of vortex parameter y (or other) is calculated as follows: Keywords: car; correlation; figure; mean; model; spoiler; stream; variant; velocity; vortex; vortices; wake; wind
• Validity of the One-Dimensional Limp Model for Porous Media by Doutres, O.; Dauchez, N.; Genevaux, J.-M.; Dazel, O. (2008) - Then, substituting the solid displacement in Eq. (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. Assuming a harmonic time dependence, the equation of motion can be written in the following form [11]: � � � �� �� � � � 2 2 212 22 ~ ~~ ~ �� �u u P us f s , (1) � � � � � �� � � �2 12 2 22 2 2~ ~ ~ ~u u Q u R us f s f , (2) with ~ ~ ~ ~ ~� � � � � � � � � � � � 11 12 Q R , ~ ~ ~ ~ ~� � � � � � � � � � � � 12 22 Q R . Keywords: frame; fsi; limp; material; model; � �
• Direct current nanogrid providing energy for water pumping: a comparative study in a riverside community in the Amazon by Parente de Oliveira Alves, Victor; Negrão Macêdo, Wilson; André Barros Galhardo, Maros (2025) - Water pumping systems are crucial for improving the quality of life for riverside communities. Ad- ditional practical approaches for increasing the effi- ciency of water pumping systems can be found, with one example presented in [12]. Keywords: amazon; current; dcdn; direct; efficiency; energy; equipment; figure; inverter; model; nanogrid; power; pump; pumping; residence; system; water; water pump
• Integration of STEM technologies into the professional training of transport engineers and expert education teachers by Lovska, Alyona; Ravlyuk, Vasyl; Derevyanchuk, Oleksandr; Dižo, Ján (2025) - A brake lever transmission of a freight wagon bogie: 1, 2 – vertical levers; 3 – a triangle; 4 – a pad; 5 – a brake pad; 6 – pendulum suspen- sions; 7 – tightening of vertical levers; 8 – a spacer; 9 – a bracket. Therefore, this must be taken into account when studying the strength of vertical lever tightening in dynamics. Keywords: bogie; brake; design; education; engineering; figure; levers; model; printing; process; stem; technologies; tightening; training
• Method of lines for reaction-diffusion systems admitting invariant regions by van der Meer, Niels; Beneš, Michal (2025) - Conclusion The finite-difference method of lines turns out to be ef- ficient, easy to implement, and accurate in approximat- ing nonlinear dynamics of reaction diffusion systems. Preserving invariance properties of reaction–diffusion systems on stationary surfaces. Keywords: convergence; diffusion; equations; method; model; numerical; reaction; solution; systems
• Fire Resistance of Axially Loaded Slender Concrete Filled Steel Tubular Columns – Development of a Three-Dimensional Numerical Model and Comparison with Eurocode 4 by Espinós, A.; Hospitaler, A.; Romero, M. L. (2009) - 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: concrete; fire; model; resistance; steel
• Calculation of a Tunnel Cross Section Subjected to Fire – with a New Advanced Transient Concrete Model for Reinforced Structures by Schneider, U.; Schneider, M.; Franssen, J.-M. (2009) - 12 we come to the conclusion that EC2 Model simulations do not give a good approxima- tion of the measured values. 5: Comparison of measured and calculated total strains under an applied load function according to Fig. 4 2.2.2 Results of measurements and calculations of total strains with an ATCM and EC2 Model The calculation is done with different load functions dur- ing heating. Keywords: atcm; beam; calculation; concrete; ec2; fig; load; model; strain; stress; time
• A New Design Method for Industrial Portal Frames in Fire by Song, Y.; Huang, Z.; Burgess, I.; Plank, R. (2009) - It is therefore convenient to write for the pure mechanical strain: � � � � � �m el pl tr tot th� � � � � . It is generally agreed that the total strain �tot comprises the following parts: � � � � �tot Keywords: atcm; beam; calculation; concrete; ec2; fig; fire; frame; load; mechanism; model; phase; strain; time
• Flock Growth Kinetics for Flocculation in an Agitated Tank by Šulc, R.; Svačina, O. (2010) - 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. 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. Keywords: correlation; dimension; flocculation; flock; fractal; kinetics; model; size; time
• On multiple M2-brane model(s) and its N=8 Superspace Formulation(s) by Bandos, I. A. (2010) - 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 . 8), and a Spin(8) 8s- plet of Majorana anticommuting Sl(2;R) spinor fields ψA (A = 1, . . . Keywords: action; algebra; blg; gauge; hep; model; sdiff3; spinor; superfield; superspace
• Maxwell-Chern-Simons Models: Their Symmetries, Exact Solutions and Non-relativistic Limits by Niederle, J.; Nikitin, A. G.; Kuriksha, O. (2010) - A particular solution has the following form: B1 = −c1x2/ω, B2 = c1x1/ω, B3 = c3A 4, (37) E1 = c2x1/ω, E2 = c2x2/ω, E3 = c3, (38) F0 = F3 = 0, Fα = ∇αA4, α = 1, 2 (39) where A4 = c4J0(c3 √ kω) + c5Y0(c3 √ kω), J0 and Y0 are the Bessel functions of the first and second kind, respectively, c1, · · · c5 are arbitrary parameters. T 002 = F 20 + F 2, T 0a2 = 1 2 F 0F a. (11) Keywords: equations; field; invariant; lagrangian; model; solutions; system
• A Study of Gait and Posture with the Use of Cyclograms by Hajný, O.; Farkašová, B. (2010) - 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 of bilateral cyclograms (also called angle-angle dia- grams). Keywords: angles; body; gait; human; knee; model
• Quantized Solitons in the Extended Skyrme-Faddeev Model by Ferreira, L. A.; Kato, S.; Sawado, N.; Toda, K. (2011) - We have found new Hopf soliton solutions for the extended Skyrme- Faddeev model. It is a (3 + 1)-dimensional Lorentz invari- ant field theory for a triplet of scalar fields �n, living on the two-sphere S2, �n2 = 1, and defined by the Lagrangian density L = M2 ∂μ�n · ∂μ�n− 1 e2 (∂μ�n ∧ ∂ν�n) 2 + (1) Keywords: model; theory
• Introduction to Modeling of Buying Decisions by Gruenwald, O. (2011) - Question C of requirement No. 9 — How satisfied are you with the spaces for parking? The first category of needs in the model comprises mandatory must-be requirements. Keywords: customer; model; needs; product; requirements; respondents; satisfaction
• The Influence of Heart and Lung Dynamics on the Impedance Cardiogram — A Simulative Analysis by Ulbrich, M.; Schauermann, A.; Leonhardt, S. (2011) - 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© 5 240 processor with 2 cores and 24 GB RAM. Another pos- sible reason for this is that processes in the human body during ICG measurements are widely unknown. Keywords: heart; icg; impedance; lung; model; signal; vol
• Analysis and Simulation of the Pi of the Sky Detector Response by Piotrowski, L. W.; Zarnecki, A. F. (2011) - 5: Left: Comparison of the position determination accuracy from polynomial model profile astrometry and from ASAS aperture astrometry, for stars brighter than 9m; Right: 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: frame; model; pixel; psf; sky
• 2005–2010 Multiwavelength Campaing of OJ287 by Valtonen, M.; Sillanpää, A. (2011) - [8] Valtonen, M. J.: Workshop on Two Years of In- tensive Monitoring of OJ 287 and 3C66A, Pro- ceedings of the meeting held in Oxford. [9] Lehto, H. J., Valtonen, M. J.: Astrophys. Keywords: astrophys; binary; jet; model; oj287; outburst; ref; valtonen
• On the Relation Between GRB Classes and X-ray Flashes by Bagoly, Z.; Veres, P.; Horváth, I.; Mészáros, A.; Balázs, L. G. (2012) - The observational properties show that intermediate bursts are the softest among the three groups, meaning that their emission is concentrated to low-energy bands. The model has the following three components with equal stan- 1http://cran.r-project.org 7 Acta Polytechnica Vol. 52 No. 1/2012 Table 1: Bivariate model parameters for the best-fitted (EEI) model. Keywords: bursts; duration; flashes; model; ray
• Overhead Line Mechanics Taking the Influence of Wind into Account by Müller, Miroslav (2012) - 2 Dynamic model of wire The analysis of dynamic behavior is based on wave equations (1)–(3). The constants describing the relationship be- tween the wire and the air are: kD = 1 2ρairφcond , kM = 1 2ρairφ 2 cond , where ρair is air density, and φcond is wire diameter. Keywords: forces; harmonics; model; position; wind; wire
• Evaluation of Bioelectrical Impedance Spectroscopy for the Assessment of Extracellular Body Water by Weyer, Sören; Röthlingshöfer, Lisa; Walter, Marian; Leonhardt, Steffen (2012) - For -2ó +2ó Mean of fluid balance and BIS ECF [ ] l D iff e re n c e b e tw e e n f lu id b a la n ce 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: bis; body; cole; fluid; impedance; model; tissue; volume; water
• A Micromechanics-Based Model for Stiffness and Strength Estimation of Cocciopesto Mortars by Nežerka, Václav; Zeman, Jan (2012) - 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 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: brick; cement; lime; matrix; model; mortars; phase; stiffness; strength
• Hierarchical Modeling of Mastic Asphalt in Layered Road Structures Based on the Mori-Tanaka Method by Valenta, Richard; Šejnoha, Michal (2012) - A comparison with the application of macroscopic homogenized constitutive model for an asphalt mixture is also presented. The following representation is proposed ω = [ τ teq Nτ0 / sinh ( τ teq Nτ0 )]M , (3) where τeq is the current equivalent deviatoric stress andM,N are model parameters. Keywords: analysis; asphalt; fig; method; model; mori; scale; sepuc; strain; tanaka
• OOFEM — an Object-oriented Simulation Tool for Advanced Modeling of Materials and Structures by Patzák, Bořek (2012) - The implementation of individual elements is further facilitated by the library of classes representing inte- gration points, integration rules, and finite element interpolation spaces. Derived classes do not inherit interfaces automatically; interface imple- mentation has to be declared by each class explicitly. Keywords: class; classes; concrete; design; element; finite; interface; load; model; parallel; problem
• Hygro-Thermo-Mechanical Analysis of a Reactor Vessel by Kruis, Jaroslav; Koudelka, Tomáš; Krejčí, Tomáš (2012) - The application of damage models is described in detail in [5]. Several damage models were used in the computer simulation. Keywords: concrete; containment; damage; heat; material; model; moisture; prestress; temperature
• Transonic Flow of Wet Steam — Numerical Simulation by Halama, Jan (2012) - 6/2012 (a) inviscid flow model (b) laminar flow model Figure 2: Mach number isolines, single-phase flow case. and τxx = η 4 3∂xux − 2 3η∂yuy, τxy 6/2012 (a) inviscid flow model (b) laminar flow model Figure 3: Mach number isolines, two-phase flow case. Keywords: condensation; flow; method; model; numerical; phase
• Predictive Models in Diagnosis of Alzheimer’s Disease from EEG by Tylova, Lucie; Kukal, Jaromir; Vysata, Oldrich (2013) - Keywords: Alzheimer’s disease, EEG, linear predictive model, quasi-stationarity, robust statistics, multiple testing, FDR. Predictive model Let m be the length of a segment. Keywords: disease; eeg; model; predictive
• NEW CONCEPT OF SOLVABILITY IN QUANTUM MECHANICS by Znojil, Miloslav (2013) - Non-Hermitian quantum models, indecomposable representations and coherent states quantization. The roots of the growth of popularity of the description of stable quantum systems using representations of observables which are non-Hermitian in an auxiliary Hilbert space H(F) may be traced back not only to the entirely abstract mathematical analyses of spectra of quasi-Hermitian operators [16] and of the operators which are self-adjoint in the so-called Krein spaces with indefinite metric [17] but also to the emergence of manageable non-Hermitian models in quantum field theory [18] or even in classical optics [19], etc. Keywords: domain; hamiltonian; hermitian; hilbert; metric; model; phys; physical; quantum; space
• THE IMPACT OF SUZAKU MEASUREMENTS ON ASTROPARTICLE PHYSICS by Ota, Naomi (2013) - 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: clusters; emission; kev; model; ray; suzaku; thermal
• THE SENSITIVITY OF THE GREENHOUSE EFFECT TO CHANGES IN THE CONCENTRATION OF GASES IN PLANETARY ATMOSPHERES by Bressler, Smadar; Shaviv, Giora; Shaviv, Nir J. (2013) - Keywords: greenhouse effect, radiative transfer, earth like planets, surface temperature. Radiative models which are essentially transmit- tance models like the LBL, cannot predict the result- ing temperature changes, as they do not impose an energy balance equation. Keywords: atmosphere; effect; greenhouse; model; surface; temperature; τfir; τvis
• EMPLOYMENT, PRODUCTION AND CONSUMPTION WITH RANDOM UPDATE: NON-EQUILIBRIUM STATIONARY STATE EQUATIONS by Lavička, Hynek; Novotný, Jan (2013) - 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: agent; equations; model; state; system; turn; wage
• ROBUST CONTROL OF END-TIDAL CO₂ USING THE H∞ LOOP-SHAPING APPROACH by Pomprapa, Anake; Misgeld, Berno; Sorgato, Verónica; Stollenwerk, André; Walter, Marian; Leonhardt, Steffen (2013) - Evaluation of model structure Both the linear and nonlinear model structures are used to describe this system. 900 Acta Polytechnica 53(6):895–900, 2013 1 Introduction 2 System modeling 2.1 System configuration 2.2 Static nonlinearity 2.3 Linear affine model 2.4 Nonlinear Hammerstein model 2.5 Evaluation of model structure 3 Design of robust controller 3.1 Loop-shaping design using H infty 3.2 Step response simulation 3.3 Evaluation of closed-loop control ventilation 4 Discussion 5 Conclusion Acknowledgements References Keywords: control; controller; etco2; hammerstein; linear; loop; model; shaping; system
• CFD SIMULATION OF A STIRRED DISHED BOTTOM VESSEL by Vlček, Petr; Skočilas, Jan; Jirout, Tomáš (2013) - 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: flow; impeller; model; number; order; vessel
• NOx PREDICTION FOR FBC BOILERS USING EMPIRICAL MODELS by Štefanica, Jiří; Hrdlička, Jan (2014) - Authors of NOX prediction models for FBC usually combine a kinetic modelling approach with FBC hydrodynamic models. Combustion parameters. Keywords: boilers; coal; combustion; fbc; fuel; model; nox; parameters; prediction
• SIMULATION OF RADIATIVE HEAT FLUX DISTRIBUTION UNDER AN INFRARED HEAT EMITTER by Loufek, Jan; Královcová, Jiřina (2015) - 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: distribution; figure; flux; heat; heat flux; model; reflector; surface; temperature
• Two-equation Turbulence Model Similarity Solution of the Axisymmetric Fluid Jet by Tesař, V. (2001) - The discussions presented e.g. in [1] and [2], supported by experimental verifications, indicate that there is � �1 (23) and from constancy of axial momentum flow rate [1] there is � � �1. . It may be decomposed into: � �P� �t t� �� ��w 2 2 (2) where the first term, in the present two-dimensional context equal to�w � � � �1 1 2 2w w , is a scalar product of two vectors, � and w. Keywords: equation; f �; fig; jet; model; rate �; solution; turbulence; velocity; z �; � c; � e; � p; � t; � u; � w; � �
• IN-CYLINDER MASS FLOW ESTIMATION AND MANIFOLD PRESSURE DYNAMICS FOR STATE PREDICTION IN SI ENGINES by Sławomir, Wojnar; Rohal-Ilkiv, Boris; Šimončic, Peter; Honek, Marek; Jozef, Csambál (2014) - Air mass flow prediction on a desired amount of assumed intake strokes. no. 0/0000 Example of an Article with a Long Title 100 14.7 1514 50 NOX CO HC C on ve rs io n % Air fuel ratio (-) 7 Figure 1. Keywords: air; control; cylinder; dynamics; engine; estimation; flow; fuel; intake; manifold; mass; model; pressure
• ISING MODEL SIMULATIONS AS A TESTBED OF NUCLEATION THEORY by Kulveit, Jan (2015) - 3. Improvements to nucleation theory 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: clusters; energy; ising; model; nucleation; phase; physical; rate; review; theory
• BEYOND THE STANDARD MODEL OF THE DISC–LINE SPECTRAL PROFILES FROM BLACK HOLE ACCRETION DISCS by Sochora, Vjaceslav; Karas, Vladimír; Svoboda, Jirí; Dovciak, Michal (2014) - Model spectrum considering background 3.1. Here we explore the fact that an accretion disc emission can be mathematically imagined as a superposition of radiating accretion rings that extend from the inner edge to the outer rim of the disc, with some radially varying emissivity. Keywords: accretion; background; black; hole; model; spectrum
• ELECTROSTATIC ION THRUSTERS - TOWARDS PREDICTIVE MODELING by Duras, Julia; Kalentev, Oleksander; Schneider, Ralf; Matyash, Konstantin; Lüskow, Karl Felix; Geiser, Jürgen (2015) - 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. This is important, since ion thrusters are qualified within various test- setups. Keywords: distribution; flux; ion; model; particles; source; thruster; vessel; walls
• COMPARISON BETWEEN 2D TURBULENCE MODEL ESEL AND EXPERIMENTAL DATA FROM AUG AND COMPASS TOKAMAKS by Ondac, Peter; Horacek, Jan; Seidl, Jakub; Vondrácek, Petr; Müller, Hans Werner; Adámek, Jirí; Nielsen, Anders Henry (2015) - 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: asdex; data; density; electron; esel; model; plasma; temperature; term; tokamak; upgrade
• EFFECT OF THE FLOW FIELD DEFORMATION IN THE WIND TUNNEL ON THE AERODYNAMIC COEFFICIENTS by Maturkanič, Dušan (2015) - 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: flow field; flow speed; model; rotation; speed; speed component; speed profile; vortex flow; wind tunnel
• SIMULATION ANALYSIS OF PREHEATER CHARGE TO THE ROTARY FURNACE by Mikula, Jan; Palička, Pavol; Kerekanic, Jan (2015) - Acceleration of simulation models for raw materials thermal treatment. The main advantages of using this type of preheater of rotary furnace are smaller dimensions for a large exchange surface and low pressure losses. Keywords: furnace; magnesite; material; model; preheater; rotary; temperature
• RESONANT SWITCH MODEL OF HF QPOS AND EQUATIONS OF STATE OF NEUTRON STARS AND QUARK STARS by Stuchlík, Zdenek; Urbanec, Martin; Kotrlová, Andrea; Török, Gabriel; Goluchová, Katerina (2014) - Neutron star models are constructed under the Hartle–Thorne theory of slowly rotating neutron stars calculated using the observationally given rotational frequency frot = 580 Hz (or alternatively frot = 290 Hz) of the neutron star at 4U 1636– 53. Acta Polytechnica doi:10.14311/AP.2014.54.0363 Acta Polytechnica 54(5):363–366, 2014 © Czech Technical University in Prague, 2014 available online at http://ojs.cvut.cz/ojs/index.php/ap RESONANT SWITCH MODEL OF HF QPOS AND EQUATIONS OF STATE OF NEUTRON STARS AND QUARK STARS Zdeněk Stuchlík∗, Martin Urbanec, Andrea Kotrlová, Gabriel Török, Kateřina Goluchová Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic ∗ corresponding author: zdenek.stuchlik@fpf.slu.cz Abstract. Keywords: frequency; model; neutron; resonant; star
• COMPARISON OF MATHEMATICAL MODELS FOR HEAT EXCHANGERS OF UNCONVENTIONAL CHP UNITS by Durcansky, Peter (2015) - Keywords: heat exchanger; CFD simulation; hot air engine. 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. Keywords: air; engine; exchanger; flow; heat; heat exchanger; model; temperature; transfer
• SIMULATION MODEL BASED ON REGIONAL DEVELOPMENT AND VIRTUAL CHANGES by Dlask, Petr (2015) - According to Schumpeter [40], innovation is in essence an instigator of economic change. Interaction matrix A of regional development model, Segment I. - Capital, Segment II. - Housing, Jobs, Segment III. – Population and vector Xt=0 of starting conditions. Keywords: changes; data; development; economic; example; figure; knowledge; management; matrix; model; new; simulation; table; time
• Modelling of Highway Runoff Quantity and Quality by Elsayed, Ashraf El-Shahat; Grünwald, A.; Synáčková, M.; Slavíček, M. (2001) - 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: data; flow; highway; model; quality; rainfall; runoff; stormwater; swmm
• CFD SIMULATION OF THE HEAT TRANSFER PROCESS IN A CHEVRON PLATE HEAT EXCHANGER USING THE SST TURBULENCE MODEL by Skočilas, Jan; Palaziuk, Ievgen (2015) - Keywords: CFD; simulation; ANSYS CFX; ANSYS CFD-Post; heat transfer; plate heat exchanger; chevron corrugated plates; pressure drop; heat transfer coefficient. 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 Keywords: coefficient; drop; exchanger; flow; heat; heat transfer; model; plate; pressure; results; simulation; transfer
• Involvement of Thermodynamic Cycle Analysis in a Concurrent Approach to Reciprocating Engine Design by Macek, J.; Takáts, M. (2001) - The chemical transformation of species yields for concen- tration changes, using the stoichiometric transformation ma- trix together with Guldberg-Waage-Arrhenius laws (5) � � � � � �V c t C m t C V c t d d d d d d s chem s*r r s*r r� � � � , (4) � �d d er r b E R T X x Y y Z zc t K T c c c� � � � � � � � � � � � � � � � � . Thus in the case of Cartesian coordinates (� stands for friction losses at walls, and in this case another closure equation is needed for them, e.g., Stokes’s and Reynolds’s hypotheses, and a turbulence model): � ��m w t V w w p A j j j Keywords: d d; engine; j j; j �; k �; model; s �; t j; t t; � d; � �
• The Validation of Computer-based Models in Engineering: Some Lessons from Computing Science by Murray-Smith, D. J. (2001) - Acta Polytechnica Vol. 41 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: computer; development; model; simulation; software; system; testing; validation
• Control System Design Based on a Universal First Order Model with Time Delays by Vyhlídal, T.; Zítek, P. (2001) - u u (8) � � � � � �T u u u u � �sin tan cos� � � � � � � . The ratio between the real and imaginary part of a complex pole is known as relative damp- ing � � �� . Keywords: control; model; parameters; system; time; � �
• Computational Investigation of Flows in Diffusing S-shaped Intakes by Menzies, R. (2001) - 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: bend; engine; flow; intake; mass; mass flow; model; pressure
• Cargo Aircraft Conceptual Design Optimisation Using a Flexible Computer-Based Scaling Approach by Schieck, F.; Schmitt, D. (2001) - 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: aircraft; design; mass; mission; model; performance; process; requirements; scaling; table; wing
• UNSTEADY FLOW OF THIXOTROPIC COLLAGEN SUBSTANCE IN PIPES by Žitný, Rudolf; Landfeld, Aleš; Skočilas, Jan; Štancl, Jaromír; Flegl, Vlastimil; Houška, Milan (2015) - 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: flow; fluid; model; parameter; rate; thixotropic; time
• ANALYTICAL METHODS FOR CALCULATING FAN AERODYNAMICS by Dostal, Jan; Kuzel, Jan (2015) - Aerodynamic performance of advanced axial flow fan for power industry within its operational range, Proceedings of ASME GT2014-25339, Dusseldorf, Germany, pp.13 http://dx.doi.org/10.1115/gt2014-25339 [4] Cyrus, V.: The effect of the Reynolds number on the three-dimensional flow in a straight compressor cascade. Keywords: aerodynamics; fan; impeller; blade; total pressure; static pressure; flow tube. Keywords: fan; flow; impeller; measuring; model; pressure
• Modeling Nonlinear Systems by a Fuzzy Logic Neural Network Using Genetic Algorithms by Attia, Abdel-Fattah; Horáček, P. (2001) - 14 shows the output model and the plant for the input: � � � �u k k� � � � �05 2 250. The actual input value is compared with the rule pre- mise using degree of overlapping: � � � � � �� � � �D X Keywords: fig; flnn; fuzzy; laga; model; parameters; sets; � y; � �
• FINITE ELEMENT ANALYSIS OF AORTAL BIFURCATION by Kronek, Jakub; Žitný, Rudolf (2015) - doi:10.1114/1.121 [7] Y. S. Chatzizisis, A. U. Coskun, M. Jonas, E. R. Edelman, C. L. Feldman and P. H. Stone, “Role of Endothelial Shear Stress in the Natural History of Coronary Atherosclerosis and Vascular Remodeling: Molecular, Cellular, and Vascular Behavior,” Journal of the American College of Cardiology, vol. 49, no. 25, pp. 2379-2393, 2007. doi:10.1016/j.jacc.2007.02.059 [8] F. Gijsen, A. van der Giessen, A. van der Steen and J. Wentzel, “Shear stress and advanced atherosclerosis in human coronary arteries,” JOURNAL OF BIOMECHANICS, vol. 46, no. 2, SI, pp. 240-247, JAN 18 2013. doi:10.1016/j.jbiomech.2012.11.006 [9] S. Zhao, B. Ariff, Q. Long, A. Hughes, S. Thom, A. Stanton and X. Xu, “Inter-individual variations in wall shear stress and mechanical stress distributions at the carotid artery bifurcation of healthy humans,” Journal of Biomechanics, vol. 35, no. 10, pp. 1367-1377, 2002. doi:10.1016/S0021-9290(02)00185-9 [10] S. van Wyk, L. P. Wittberg and L. Fuchs, “Wall shear stress variations and unsteadiness of pulsatile blood-like flows in 90-degree bifurcations,” Computers in Biology and Medicine, vol. 43, no. 8, pp. Polytechnica 55(6):393–400, 2015 1 Introduction 2 Methods 2.1 Geometry of AB 2.2 Experimental measurements of geometries 2.3 Experimental measurements of material properties 2.4 FE models 2.5 Analytical approximation of SCF, maximum stresses and range 3 Results and discussion 3.1 Sizes of the affected regions 3.2 Qualification of the stress in stress concentrations 4 Conclusion References Keywords: bifurcation; elastic; figure; model; parameters; pressure; scf; stress; vol; wall
• THE GOODNESS OF SIMULTANEOUS FITS IN ISIS by 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 (2016) - 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: data; datasets; fit; goodness; group; model; parameters; red; residuals; simultaneous
• Numerical Modelling of Overburden Deformations by Barták, J.; Hilar, M.; Pruška, J. (2002) - � 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. For the computa- tional models, the following input data were considered: � backfill: E � 20 MPa; � � 0.3; � � 23 kN/m3; � � 20°; Keywords: deformations; grouting; model; modelling; monastery; settlement; tunnel; � �
• PARAMETRIC STUDIES ON THE COMPONENT-BASED APPROACH TO MODELLING BEAM BOTTOM FLANGE BUCKLING AT ELEVATED TEMPERATURES by Quan, Guan; Huang, Shan-Shan; Burgess, Ian (2016) - 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: beam; buckling; deflection; fig; flange; flange buckling; model; shear
• ELASTO-KINEMATIC COMPUTATIONAL MODEL OF SUSPENSION WITH FLEXIBLE SUPPORTING ELEMENTS by Vrána, Tomáš; Bradáč, Josef; Kovanda, Jan (2016) - Validation of inertia moments of suspension supporting elements Moments of inertia of supporting elements calculated from geometrical models in Hypermesh have been verified by experimental measurements on so-called torsion hanger [9]. 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 Keywords: angle; elasto; elements; figure; flexibility; kinematic; mbs; model; subframe; suspension; toe
• VERIFICATION AND VALIDATION OF NUMERICAL MODEL OF FIRE AND SMOKE DEVELOPMENT IN RAILWAY TUNNEL by Cabová, Kamila; Wald, František (2016) - Verification of numerical model of fire and smoke development in railway tunnel. [17] Rhodes, N. CFD modelling of tunnel fires, Chapter 15 in Handbook of Tunnel Fire Safety, 2nd edition, ICE Publishing, London, UK, p. 329-346, doi: 10.1680/htfs.41530.329 [18] Silva, J.C. and Landesmann, A. Performance-based analysis of steel-concrete composite floor exposed to fire, Journal of Constructional Steel Research, Vol. 83, pp. 117-126, doi:10.1016/j.jcsr.2013.01.009 Keywords: fds; fire; flow; gas; mesh; model; numerical; results; temperature; tunnel; verification
• A SUPERINTEGRABLE MODEL WITH REFLECTIONS ON S^3 AND THE RANK TWO BANNAI-ITO ALGEBRA by De Bie, Hendrik; Genest, Vincent Xavier; Lemay, Jean-Michel; Vinet, Luc (2016) - , c2n−1 commuting with H, that is [H, ci] = 0 for i = 1, . . . = ( 1 2 + µjRj + µkRk + ( iJjk + µj sk sj Rj − µk sj sk Rk ) k∏ l=j+1 Rl ) RjRk, 1 ≤ j < k ≤ 4, (2.3) can easily be verified to commute with H on the 3-sphere and are thus conserved. Keywords: algebra; bannai; ito; model; polynomials
• CONSTITUTIVE MODEL OF STEEL FIBRE REINFORCED CONCRETE SUBJECTED TO HIGH TEMPERATURES by Blesak, Lukas; Goremikins, Vadims; Wald, Frantisek; Sajdlova, Tereza (2016) - This paper focuses on the last point – material model simulation. The tensile behaviour pattern of this material code is based on a stress-fracture strain defi- nition, not on fracture energy as other material models in ATENA are, whilst the material model formula- tion is based on the strain decomposition into elastic, plastic and fracturing components [14]. Keywords: behaviour; concrete; crack; fibre; figure; material; model; sfrc; steel; stress
• Modified Glaser’s Condensation Model by Ficker, T.; Podešvová, Z. (2003) - 2 Non-isothermal steady-state diffusion In our previous paper I I 0] we developed two basic models for describing non-isothermal steady-state diffirsion of water vapor through porous building materials, namely the DIAL and DRAL models. [m] ?tKl Glaser's standard model DIAL model DRAL model Rd.lo-e . Keywords: building; condensation; dial; glaser; model; vol
• NUMERICAL MODELLING OF THE SOIL BEHAVIOUR BY USING NEWLY DEVELOPED ADVANCED MATERIAL MODEL by Veselý, Jan (2017) - 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: clay; data; figure; hardening; jphs; model; numerical; plastic; strain; stress; surface; yield
• Management Processes in Technical-economic Design, Decision-making, Fractals and Market Bubbles by Beran, V. (2003) - To what extent will be decision processes D- in time strata tx+,? Diagrammatic calculations according to (3) to (5) are shown in Thble 3 (a segment fiom a wider calculation of how the market will fill up in time (vertical axis) and the space for steering decisions for management shows the demand op- portunities (horizontal axis)). Keywords: area; basis; decision; making; management; market; model; process; processes; solutions; steering; technical; time
• APPROACHES TO THE GAS CONTROL IN UCG by Kačur, Ján; Kostúr, Karol (2017) - 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 (0–10VDC) 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: air; coal; concentration; control; control system; controller; figure; flow; gas control; gasification; model; parameters; pressure; process; stabilization; syngas; system; temperature; ucg; underground; value; variable
• PRELIMINARY STUDY ON COMBUSTION AND OVERALL PARAMETERS OF SYNGAS FUEL MIXTURES FOR SPARK IGNITION COMBUSTION ENGINE by Toman, Rastislav; Polóni, Marián; Chríbik, Andrej (2017) - [1] LHV lower heating value [kJ/kg] Acronyms 1Cyl single-cylinder combustion analysis model Full full scale engine model EVC exhaust valve closes EVO exhaust valve opens IVC inlet valve closes IVO inlet valve opens SI spark ignition engine TDC top dead center NG natural gas SG syngas CH4 methane molecule H2 molecular hydrogen N2 molecular nitrogen O2 molecular oxygen CO carbon monoxide CO2 carbon dioxide NOx mono-nitrogen oxides (NO and NO2) 46 vol. Other possibility is to employ the advanced predic- tive combustion models to model and study the ICE combustion process for different fuel mixtures Keywords: analysis; burn; combustion; cylinder; engine; figure; fuel; lgw; mixtures; model; paper; parameters; pressure; simulation; speed; syngas
• Numerical Implementation of Isotropic Consolidation of Clayey Soils by Janda, T.; Kuklík, M.; Šejnoha, M. (2003) - 2: Time variation of pore pressure with no smoothing of the bilinear consolidation line double S type of curve where individual segments of this curve are linked to a given slope of the bilinear consolidation line. AIso note that the pore pressure dependent material parameters K and e are found from an initial pre- diction of pore pressure T;'(tp) at time 6u r-q. i7). Keywords: consolidation; fig; finite; form; line; method; model; numerical; parameters; pressure; time
• Models for Non-isothermal Steady-State Diffusion in Porous Building Materials by Ficker, T.; Podešvová, Z. (2003) - A reasonable choice [5] for the temperature profile (x) of a wall is the linear function T, -T^T@)=rt--' ,-'*, (Tt>Til ' (3) & Frck's first law for non-isothermal diffusion assumes the following form Nearly constant total concentration c can be expected not only with non-isothermal diffusion of a gas in a solid cotn- pact body which does not contain any air pores but also in solid materials containing closed pores (cavities) filled with air. Keywords: air; conditions; diffusion; model; profile; temperature
• The Computing of the Influence of a Steady Element on the Polarization Spectrum by Cimbala, R.; Kršňák, I.; Kolcunová, I. (2003) - 8: Calculation without steady element Fig. 9: Calculation with steady element Acta Polytechnica Vol. 43 No. 2/2003 calculalion t1me[sl t1me[sl 1000 1000 real real 100 100 10 10 100.l------~-----~- _ 1 <' loooI 100 .------------,------ 1 <' ~1000 +--'=---=------------------1 ~ :s Fig. In the third column of data with 7 expansion elements can be seen that the calculation exactly revealed steady element 10 and deter­ mined its value. Keywords: calculation; current; data; element; fig; model; polarization; present; time
• NUMERICAL AND MECHANICAL ANALYSES OF A 3D-PRINTED TITANIUM TRABECULAR DENTAL IMPLANT by Řehounek, Luboš; Jíra, Aleš (2017) - If proven to be satisfying in medical, mechanical and economic regards, trabecular structure could improve upon the former variants. Trabecular structure Keywords: bone; fig; implant; material; model; modulus; properties; specimens; stress; structure; test
• DESIGN AND CONSTRUCTION OF A PROTOTYPE SOLAR UPDRAFT CHIMNEY IN ASWAN/EGYPT by Harte, Reinhard; Tschersich, Markus; Höffer, Rüdiger; Mekhail, Tarek (2017) - A simple method to evaluate the turbine power output for solar chimney systems was also proposed in the study using dimensional analysis. [5] Huang, H., Zhang, H., Huang, Y., Lu, F. Simulation calculation on solar chimney power plant system. Keywords: analysis; aswan; cfd; chimney; collector; data; energy; figure; flow; inside; model; monitoring; results; scpp; solar; system; tower; wind
• CONTRA-ROTATING PROPELLER AERODYNAMICS SOLVED BY A 3D PANEL METHOD WITH COUPLED BOUNDARY LAYER by Štorch, Vít; Nožička, Jiří (2017) - 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: contra; figure; layer; method; model; panel; propeller; thrust; velocity; vortex; wake; −0.1
• Aerodynamic Design and Experimental Investigation of the Sailplane Wing Tip Devices by Anderle, P.; Smrček, L.; Coton, F. N. (2003) - l0: Wing tip model A E@H ct@tE6 the vorticity associated with the wingletAving junction does not appear as a single well defined vortex but rather as a more spread-out region of vorticity. During the oKeywords: drag; fig; model; tip; traverse; tunnel; vol; wind; wing; winglet; wire
• Detailed Numerical Modeling of Flood Flow in Floodplains with Complex Geometry by Valenta, P.; Valentová, J. (2003) - While 3D models are still too demanding to be used for flood flow modeling, quasi-2D and 2D models can nowadays be more widely used to solve larger practical problems, even on personal computers. Detailed two-dimensional numerical rnodeling of flood flow in flooded urbanized areas with cornplex geometry using the 2D dlpth aaeraged model is presmted in this paper. Keywords: data; depth; equations; evaluation; fig; flood; flow; model; modeling; numerical; results; water
• SIMPLE MODELS OF THREE COUPLED PT -SYMMETRIC WAVE GUIDES ALLOWING FOR THIRD-ORDER EXCEPTIONAL POINTS by Schnabel, Jan; Cartarius, Holger; Main, Jörg; Wunner, Günter; Heiss, Walter Dieter (2017) - 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. In much rarer cases exceptional points of higher order (EPN) are discussed [27–30]. Keywords: -symmetric; doi:10.1103; ep3; guides; matrix; model; order; parameter; phys; points; wave
• The Biomechanics of Gender Difference and Whiplash Injury: Designing Safer Car Seats for Women by Mordaka, J.; Gentle, R. (2003) - No. 3l20Az and horizontal motions are higher for female models, sug- gesting it might be related to a higher injury occurrence. ,,;.*::::tive ro c6 It should be noted that for female models there is higher downward translation during rebound motion, followed by an upward shift. Keywords: car; cervical; female; head; injuries; injury; males; model; neck; rear; risk; spine; vol; whiplash
• On Planning and Managing the Preservation of Historical Buildings by Jarský, Č. (2003) - On the basis of typical network diagrams and a database of construction processes, a model of the actual erection of a building and a model of its maintenance and re- construction can be automatically created. The technological standard (technological analysis sheet or programme) determines the technological structure of the production process (the sequence of construction processes, volume of production, labour and cost consumption, number and type ofworkers or machines, etc.). Keywords: building; building process; construction; diagram; model; network; process; processes; project; quality; technology; time
• ESTIMATION OF THE LATERAL AERODYNAMIC COEFFICIENTS FOR SKYWALKER X8 FLYING WING FROM REAL FLIGHT-TEST DATA by Mohammadi Farhadi, Rahman; Kortunov, Vyacheslav; Molchanov, Andrii; Solianyk, Tatiana (2018) - Estimated aerodynamic parameters are compared with the theoretically calculated coefficients of the UAV, moreover, the dynamic model is validated with additional flight-test data and small covariances of the estimated parameters. Output signals for mathematical models with estimated parameters of all of the approaches are given in Figures 10–14. Keywords: case; coefficients; data; estimation; flight; identification; linearity; lsm; model; oem; optimization; parameters; sx8fw; uav; values; wind
• ŽAMPA’S SYSTEMS THEORY: A COMPREHENSIVE THEORY OF MEASUREMENT IN DYNAMIC SYSTEMS by Rychtáriková, Renata; Urban, Jan; Štys, Dalibor (2018) - From the point of view of Žampa’s theory, terms like system time, system attributes, system link, system element, input, output, sub-systems, and state variables are defined. System time and attributes System events occur at certain objects of the real world and represent themselves by changes of certain quali- ties which we are able to perceive in a certain way and organize in our mind. Keywords: abstract; attributes; causal; cause; definition; figure; image; information; model; set; state; sub; system; theory; time; trajectory; variables; žampa
• Computational Fluid Dynamic Simulation (CFD) and Experimental Study on Wing-external Store Aerodynamic Interference of a Subsonic Fighter Aircraft by Lazim, Tholudin Mat; Mat, Shabudin; Saint, Huong Yu (2003) - 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: aircraft; cfd; fig; model; pressure; store; surface; tunnel; wing
• Concurrent Design of Railway Vehicles by Simulation Model Reuse by Valášek, M.; Steinbauer, P.; Kolář, J.; Dvořák, J. (2003) - 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: design; fig; knowledge; model; modelling; simulation; world
• ADSORPTION OF CATIONIC DYE FROM AQUEOUS SOLUTION USING COMPOSITE CHICKEN EGGSHELL - ANTHILL CLAY: OPTIMIZATION OF ADSORBENT PREPARATION CONDITIONS by Yusuff, Adeyinka Sikiru (2019) - Analysis of variance (ANOVA) for response surface quadratic model for MB dye adsorption. Comparison of monolayer adsorption capacities of different adsorbents for MB dye adsorption. Keywords: adsorbent; adsorption; anthill; calcination; ceac; composite; design; dye; eggshell; journal; kinetics; model; order; solution
• ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE UNDER HIGH-VELOCITY PROJECTILE IMPACT - PART 2. APPLICABILITY OF PREDICTION MODELS by Kravanja, Sebastjan; Sovják, Radoslav (2018) - APPLICABILITY OF PREDICTION MODELS Sebastjan Kravanjaa, Radoslav Sovjákb,∗ a Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova cesta 2, Ljubljana 1000, Slovenia b Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague 6, Czech Republic ∗ corresponding author: sovjak@fsv.cvut.cz Abstract. Keywords: projectile impact; UHPFRC; prediction models; depth of penetration; mass ejection. Keywords: accuracy; concrete; depth; energy; fibre; impact; mass; model; penetration; prediction; projectile; results; target
• DETERMINATION OF DETONABLE GAS MIXTURE HEAT FLUXES AT THERMAL DEBURRING by Plankovskyy, Sergey; Teodorczyk, Andrzei; Shypul, Olga; Tryfonov, Oleg; Brega, Dmytro (2019) - 2/2019 Determination of detonable gas mixture heat fluxes at thermal deburring Taking into account the complicated nature of the modelled system, some assumptions were used: • 2/2019 Determination of detonable gas mixture heat fluxes at thermal deburring Figure 1. Keywords: chamber; combustion; deburring; flux; heat; mixture; model; pressure; shock; temperature; waves
• MODEL-BASED SECURITY ANALYSIS OF FPGA DESIGNS THROUGH REINFORCEMENT LEARNING by Vetter, Michael (2019) - 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.) Transformation flow from the FPGASECML to the BURLAP based reinforcement learning model. Keywords: actions; attacks; data; fpga; learning; mdp; model; reinforcement; reward; scenario; security; state; system
• MODELLING, SIMULATION AND PARAMETER IDENTIFICATION OF ACTIVE POLLUTION REDUCTION WITH PHOTOCATALYTIC ASPHALT by Kruschwitz, Jens; Lind, Martin; Muntean, Adrian; Richardson, Omar; Wondmagegne, Yosief (2019) - 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: asphalt; concentration; data; figure; measurements; model; pollution; simulation
• A NEW AND ADAPTIVE SECURITY MODEL FOR PUBLIC COMMUNICATION BASED ON CORRELATION OF DATA FRAMES by Haider, Haider Tarish; Muhsen, Dhiaa Halboot; Shahadib, Haider Ismael; See, Ong Hang (2019) - Cover image Secret image NC Office Rice 0.009 Rice Office 0.008 Cameraman Text 0.006 Table 5. Results of cameraman secret image and the rice cover image. Keywords: capacity; communication; cover; data; image; key; length; message; model; secret; security
• A COMPARATIVE STUDY OF DATA-DRIVEN MODELING METHODS FOR SOFT-SENSING IN UNDERGROUND COAL GASIFICATION by Kačur, Ján; Durdán, Milan; Laciak, Marek; Flegner, Patrik (2019) - 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. Equation (31) represents a resulting piecewise-cubic type of MARS model for the prediction of the under- ground temperature. Proposal of Neural network considered for UCG data prediction. Keywords: c o; calorific; coal; control; data; function; gasification; input; mars; methods; model; prediction; process; regression; results; syngas; temperature; training; ucg; underground; value; variables; � �
• Computational Fluid Dynamic Simulation (CFD) and Experimental Study on Wing-external Store Aerodynamic Interference by Lazim, Tholudin Mat; Mat, Shabudin; Saint, Huong Yu (2004) - Research on external store installation is complex and extensive. 1: Photographs of the marked wing surface at the various projection Fig. 2: Aircraft geometry produced by Photomodeller Fig. 3: Digitized wing geometry after smoothed with CAD -Alloy that having nine conduits each on the upper and lower surface. Keywords: aircraft; clean; fig; model; pressure; store; surface; vol; wing
• DEFLECTIONS AND FREQUENCY ANALYSIS IN THE MILLING OF THIN-WALLED PARTS WITH VARIABLE LOW STIFFNESS by Kononenko, Serhii; Dobrotvorskiy, Sergey; Basova, Yevheniia; Gasanov, Magomediemin; Dobrovolska, Ludmila (2019) - 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 0.17984mm and 0.15186mm respectively. Keywords: amplitude; analysis; cutting; deflection; force; frequency; milling; model; response; sample; system
• The Role of CAD in Enterprise Integration Process by Ota, M.; Jelínek, I. (2004) - 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: cad; cax; communication; data; enterprise; information; integration; model; software; system
• Development of a Technique and Method of Testing Aircraft Models with Turboprop Engine Simulators in a Small-scale Wind Tunnel - Results of Tests by Petrov, A. V.; Stepanov, Y. G.; Shmakov, M. V. (2004) - The tests were conducted at flow velocities of V � � 20 to 50 m/s in the ranges of angles of attack � � �6 to 20 deg, sideslip angles of � � �16 to 16 deg and blade loading coefficient of B � 0 to 2.8. The effectiveness of the rudder on the model in takeoff configuration at an angle of attack of � � �5 and B �2 increases by a factor of 1.6–1.7 at � �0, and by a factor of 1.8–2.1 at � � �6 through �10 deg. Keywords: aerodynamic; aircraft; characteristics; deg; model; � �
• Knowledge Support of Simulation Model Reuse by Valášek, M.; Steinbauer, P.; Šika, Z.; Zdráhal, Z. (2004) - 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: clockwork; development; knowledge; model; simulation; simulation model; tool; world
• INVERTED PENDULUM WITH LINEAR SYNCHRONOUS MOTOR SWING UP USING BOUNDARY VALUE PROBLEM by Koska, Lukáš; Jadlovská, Slávka; Vošček, Dominik; Jadlovská, Anna (2019) - 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. Modelling of classical and rotary inverted pendulum systems–a generalized approach. Keywords: cart; control; input; model; pendulum; swing; system; time; trajectories; trajectory
• STUDY ON MCNP6 MODEL IN THE CALCULATION OF KINETIC PARAMETERS FOR PEBBLE BED REACTOR by Zuhair, ; Suwoto, ; Setiadipura, Topan; Su'ud, Zaki (2020) - Keywords: kinetic parameters, pebble bed reactor, uranium loading, 235U enrichment, H/D ratio. Parameter and core specification of pebble bed reactor [10]. Keywords: bed; bed reactor; core; enrichment; fuel; graphite; loading; model; neutron; parameters; pebble; reactor; uranium
• ENERGY GAIN FROM ERROR-CORRECTING CODING IN CHANNELS WITH GROUPING ERRORS by Kuznetsov, Alexandr; Oleshko, Oleg; Kuznetsova, Kateryna (2020) - 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: channels; code; egc; error; lav; length; model; probability
• MODEL REFERENCE ADAPTIVE CONTROL-BASED GENETIC ALGORITHM DESIGN FOR HEADING SHIP MOTION by Al-Awad, Nasir Ahmad (2020) - [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. Ship steering control system. Keywords: adaptive; control; controller; design; figure; heading; journal; model; nomoto; reference; ship; steering; time
• THE DEVELOPMENT OF A NEW ADSORPTION-DESORPTION DEVICE by Gabrišová, Ľudmila; Peciar, Peter; Macho, Oliver; Juriga, Martin; Galbavá, Paulína; Nižnanská, Žofia; Kubinec, Róbert; Valent, Ivan; Peciar, Marián (2020) - Acta Polytechnica DOI:10.14311/AP.2020.60.0455 Acta Polytechnica 60(6):455–461, 2020 © Czech Technical University in Prague, 2020 available online at https://ojs.cvut.cz/ojs/index.php/ap THE DEVELOPMENT OF A NEW ADSORPTION-DESORPTION DEVICE Ľudmila Gabrišováa,∗, Peter Peciara, Oliver Machoa, Martin Jurigaa, Paulína Galbaváb, Žofia Nižnanskáb, Róbert Kubinecb, Ivan Valentc, Marián Peciara a Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Process Engineering, Námestie Slobody 17, 812 31 Bratislava, Slovakia b Comenius University in Bratislava, Faculty of Natural Sciences, Institute of Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia c Comenius University in Bratislava, Faculty of Natural Sciences, Department of Physical and Theoretical Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia ∗ corresponding author: ludmila.gabrisova@stuba.sk Abstract. Keywords: Adsorption, desorption, air stripping, activated carbon, ethanol. Keywords: adsorption; carbon; device; doi:10.1016; engineering; ethanol; gas; mixture; model; process; separation; stripping; temperature; water
• Common Mathematical Model of Fatigue Characteristics by Maléř, Z.; Slavík, S.; Marczi, T.; Růžička, M. (2004) - The designed model was able to describe, with sufficient accuracy and reliability, the results for five different struc- tures and elements within the range of N � 104 through 106 to 107, and within the range of R � �1 through 0.6, pre-processed in some way (graphical or mathematical). The fatigue data usually described the region of N �104 to 3 106� and stress ratio of R to� �2 05. . Keywords: model; � �
• HOMOGENIZATION OF TRANSPORT PROCESSES AND HYDRATION PHENOMENA IN FRESH CONCRETE by Beneš, Michal; Štefan, Radek (2020) - 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. In [20], the authors proposed an analytical approx- imation of the solution to the periodic cell problem (17) with a step function A defined by (18). Due to the limited scope of the paper, such problem is not presented and will be analysed in our future work. Keywords: cell; concrete; homogenization; hydration; mesh; mesoscale; model; problem; solution; transport; water
• DEVELOPMENT OF NUMERICAL MODELS FOR THE PREDICTION OF TEMPERATURE AND SURFACE ROUGHNESS DURING THE MACHINING OPERATION OF TITANIUM ALLOY (Ti6Al4V) by Daniyan, Ilesanmi; Tlhabadira, Isaac; Mpofu, Khumbulani; Adeodu, Adefemi (2020) - The feasible combinations of these process parameters produced 41 experimental trials whose response (surface roughness and temperature) were determined via the physical experimentations. For the three input data parameters employed for this study (the feed rate, spindle speed and the cut- ting velocity), the number of the neurons in the hid- den layer was obtained as ten and the corresponding number of the output layer and expected output pa- rameters was three (depth of cut, surface roughness and temperature) as shown in Figure 4. Keywords: cutting; depth; figure; model; network; parameters; piece; process; rate; speed; spindle; surface; surface roughness; temperature; tool; value
• Integration of CFD Methods into Concurrent Design of Internal Combustion Engine by Polášek, M.; Macek, J.; Vítek, O.; Kozel, K. (2004) - 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. 3 Application of a thermodynamic model to SI engine downsizing concept simulation The current trend toward significant CO2 reduction calls for an increase in the fuel economy of engines and cars. Keywords: combustion; cylinder; design; engine; fig; knock; level; model; simulation; temperature; time
• COUPLED ELECTROMAGNETIC-THERMAL SIMULATION OF A POWER TRANSFORMER BY 3D FEM by Henriques, Henrique Oliveira; Vizeu, Carlos Eduardo; Souza, Paulo Cesar; Costa, Mauricio Caldora; Sotelo, Guilherme Gonçalves; Sousa, Jonaylton Moura; Fortes, Marcio Zamboti; Ferreira, Vitor Hugo (2020) - Power transformers are the most common equipment in an electric power system, which has been manufactured in the last decade. Keywords: Power transformer, thermal simulation, finite element method, hot spot, CFD. Keywords: case; figure; heat; load; model; oil; power; power transformer; simulation; temperature; transformer; windings
• A Numerical Model to Predict Matric Suction Inside Unsaturated Soils by Farouk, A.; Lamboj, L.; Kos, J. (2004) - r R1 1� � �( tan sec )� � , (6) x R� sin � , (7) z R� �2 1( cos )� . 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. Keywords: fig; matric; model; particles; soil; suction; water; � �
• NEWMARK ALGORITHM FOR DYNAMIC ANALYSIS WITH MAXWELL CHAIN MODEL by Schmidt, Jaroslav; Janda, Tomáš; Zemanová, Alena; Zeman, Jan; Šejnoha, Michal (2020) - Top, center, and bottom graphs show trajectories for time steps ∆t = 1.0 s, ∆t = 0.5 s, and ∆t Left: the evolution of internal energy Eint and dissipation Dd, normalized by the work done by external forces Wd for time step ∆t = 0.5 s. Right: the evolution of numerical dissipation ∆d, normalized by the work done by external forces Wd. discretize the sample into identical 1,000 hexahedron elements and consider the time step of 0.01 s. The snapshots of the vibrations reveal a similar behaviour to the SDOF example, recall Figure 3, namely the attenuation of the propagating waves by viscous damping. Keywords: algorithm; equations; glass; maxwell; model; newmark; p=1; section; step; time; variational
• MODELING OF MATERIAL BALANCE FROM THE EXPERIMENTAL UCG by Durdán, Milan; Terpák, Ján; Kačur, Ján; Laciak, Marek; Flegner, Patrik (2020) - Keywords: Underground coal gasification, material balance, atoms, ex-situ reactors, losses. 5/2020 Modeling of material balance from the experimental UCG account phases of individual substances (i.e., solid, liquid, and gaseous phases). Keywords: balance; chemical; coal; coal gasification; experiment; gasification; mass; material; material balance; model; process; syngas; ucg
• APPLICATION OF ADVANCED COMBUSTION MODELS IN INTERNAL COMBUSTION ENGINES BASED ON 3-D CFD LES APPROACH by Vítek, Oldřich; Macek, Jan; Doleček, Vít; Syrovátka, Zbyněk; Pavlovic, Zoran; Priesching, Peter; Tap, Ferry (2021) - Comparison of 1st cycle simulation data related to medium-lean conditions (the Case A2 in Table 3) while comparing different combustion models (no label corresponds to ECFM, label ‘TABKIN’ represents FGM combustion model while considering different chemical mechanisms) – top left subfigure corresponds to in-cylinder pressure, top right represents pre-chamber pressure, bottom left shows in-cylinder ROHR, bottom right subfigure presents in-cylinder HR. issues) is in progress. Concerning combustion models, different ap- proaches were applied depending on ICE type. Keywords: case; cfd; chamber; chemistry; combustion; cylinder; data; engine; figure; flame; ice; les; model; pre; pressure; results; rohr; table; time; turbulence
• Nonlocal Theories in Continuum Mechanics by Jirásek, M. (2004) - The dispersion equation corresponding to (24), � � � � � ��� �� �2 2 2 2 2 2 0Ek l Ek k( ) (25) yields the phase velocity c k c k l k l p � � � � � � 0 2 2 2 2 1 1 , (26) where c E0 � �, as usual. Classical plasticity with linear isotropic hardening is de- scribed by the basic equations � � �� �G p( ) (55) � � sgn( )� � �p � (56) � , ( , ) , � ( , )� � � � � �� � �0 0 0f f (57) where �p is the plastic strain and � is the cumulative plastic strain. Keywords: equation �; function �; l �; model; r �; size; strain �; stress �; wave; � /a; � c; � d; � e; � f; � g; � k; � p; � u; � �
• INVESTIGATION OF COMPRESSIBLE FLOW THROUGH A TURBINE BLADE CASCADE FOR VARIOUS TRANSONIC FLOW REGIMES by Louda, Petr; Příhoda, Jaromír; Šafařík, Pavel (2021) - Prediction of boundary layer transition in transonic blade cascade with sudden change of surface curvature. Advanced mathematical models with two different models of the bypass transition to turbulence were applied for the simulation of different regimes of transonic flows as well as with attached and separated flows. Keywords: blade; blade cascade; cascade; design; flow; model; operation; transition; turbine
• Neural Network Based Identification of Material Model Parameters to Capture Experimental Load-deflection Curve by Novák, D.; Lehký, D. (2004) - The aim of this paper is to present a new approach for identifying material model parameters. Once the network is trained it represents an approx- imation which can be utilized in a reverse way: for a given experimental load-deflection curve to provide the best possi- ble set of material model parameters. Keywords: deflection; layer; load; material; model; network; parameters; � �
• Dynamic Bridge Response for a Bridge-friendly Truck by Šmilauer, V.; Máca, J.; Valášek, M. (2004) - 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. (9) The second performance criterion considered driver comfort in the form of truck sprung mass acceleration: ACC z a tSUM t � �� (�� �� )1 2 0 � d . Keywords: bridge; fig; model; z z; � �
• Effect of Stirrups on Behavior of Normal and High Strength Concrete Columns by Němeček, J.; Padevět, P.; Bittnar, Z. (2004) - [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: columns; concrete; fig; microplane; model; peak; series
• On Adequacy of Two-point Averaging Schemes for Composites with Nonlinear Viscoelastic Phases by Zeman, J.; Valenta, R.; Šejnoha, M. (2004) - 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. In particular, under the ergodic hypothesis [21] the vol- ume average of function � �r( , )x given by � � �r V r V V ( , ) lim ( )x x y y� � �� � 1 d , (2) is independent of � and identical to the ensemble average � �r r r rS c( ) ( ) ( )x x x� � � , (3) where cr is the volume fraction of the rth phase. Keywords: fig; matrix; model; response; strain; stress; vol; y �; � d; � e12; � r; � �
• Influence of Ring Stiffeners on a Steel Cylindrical Shell by Lemák, D.; Studnička, J. (2005) - 02� , (10) N D D D � � � � � � � � � � � 8306 10 4 020 10 1441 10 2940 1 11 3 07 2 04 . I D D� � �303 3350 8727002. . Keywords: analysis; deformation; diameter; fig; model; shell; stiffeners; wind; � �
• DESIGN OPTIMIZATION OF MOVEABLE MOMENT STABILIZATION SYSTEM FOR ACCESS CRANE PLATFORMS by Ermis, Kemal; Caliskan, Mehmet; Tanriverdi, Muammer (2021) - 229 http://dx.doi.org/10.1109/ICICIP.2010.5565257 http://dx.doi.org/10.15317/scitech.201426889 http://dx.doi.org/10.4236/ojsst.2012.21002 http://dx.doi.org/10.15632/jtam-pl.54.1.41 http://dx.doi.org/10.1016/j.compstruc.2006.08.010 http://dx.doi.org/10.1016/j.ijmecsci.2014.07.009 http://dx.doi.org/10.1016/j.proeng.2012.07.274 http://dx.doi.org/10.1016/j.csefa.2015.03.005 http://dx.doi.org/10.1016/j.egypro.2016.12.096 http://dx.doi.org/10.1115/DSCC2010-4241 http://dx.doi.org/10.1049/joe.2018.8961 http://dx.doi.org/10.2174/1874155X01408010219 http://dx.doi.org/10.1016/j.autcon.2007.05.004 http://dx.doi.org/10.1177/1687814018808697 http://dx.doi.org/10.1016/j.engfailanal.2016.12.006 http://dx.doi.org/10.3846/16484142.2011.642946 http://dx.doi.org/10.1109/icicip.2012.6391539 Acta Polytechnica 61(1):219–229, 2021 1 Introduction 2 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: analysis; figure; machine; model; msc; platform; structure; weight; work; work platform; working
• A model of isotope transport in the unsaturated zone, case study by Chudoba, Josef; Královcová, Jiřina; Landa, Jiří; Maryška, Jiří; Říha, Jakub (2022) - This work deals with a groundwater flow and solute transport model in the near-surface (predomi- nantly unsaturated) zone. A prediction of radionuclide concentration distribution in groundwater is done by transport simulations along with groundwater flow simulations (both mainly in saturated zone). Keywords: boundary; case; concentration; domain; flow; model; simulation; time; transport; zone
• Modelling a New Product Model on the Basis of an Existing STEP Application Protocol by Hoehn, B.-R.; Steingroever, K.; Jaros, M. (2005) - 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: application; data; gear; model; product; step; units
• Subjective approach to optimal cross-sectional design of biodegradable magnesium alloy stent undergoing heterogeneous corrosion by Zarei, Najmeh; Anvar, Seyed Ahmad; Goenezen, Sevan (2021) - 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. To find the optimum profile design of the stent subjectively (without using optimization codes and with much less computational costs), radial recoil was limited to 27 % (corresponding to about 10 % probability of in-stent diameter stenosis after an almost complete degradation) and the stent with the highest radial stiffness was selected. Keywords: corrosion; design; element; magnesium; model; recoil; stent; stiffness; time
• Determination of bond model for 7-wire strands in pretensioned concrete beam by Parkhats, Vadzim; Krzywoń, Rafał; Hulimka, Jacek; Kubica, Jan (2021) - Licensed under a CC-BY 4.0 licence Published by the Czech Technical University in Prague DETERMINATION OF BOND MODEL FOR 7-WIRE STRANDS IN PRETENSIONED CONCRETE BEAM Vadzim Parkhats∗, Rafał Krzywoń, Jacek Hulimka, Jan Kubica Silesian University of Technology, Faculty of Civil Engineering, Department of Structural Engineering, Akademicka 5, 44-100 Gliwice, Poland ∗ corresponding author: vadzpar036@student.polsl.pl Abstract. Bond models found in the literature are applied in finite element modelling of the beam used in the experimental test to establish the most appropriate ones. Keywords: beam; bond; concrete; element; finite; model; strands
• Dynamic Behaviour of the Patented Kobold Tidal Current Turbine: Numerical and Experimental Aspects by Coiro, D. P.; Marco, A. De; Nicolosi, F.; Melone, S.; Montella, F. (2005) - For one blade and for the upwind actuator disk a a sen V V Cu u u Ru lu u zvu u( ) ( , ,Retan1 1 8 2 � � � � � �� � � � �� � ) ( ) ( , ,Re ) cos( ) tan tan tan � � � � � sen C C � � � � � � u u du u zvu u u u mc u zvu u nu u zvu u c cer 4 4 ( , ,Re ) ( , ,Re ) ( ) tan tan� � � �� � � C x x � � � � � � cos ( , ,Re ) ( ) tan � � � � zvu tu u zvu u c cer zvu C x x sen4 0 (5) For the downwind actuator disk ( )( ) ( ,tan 1 2 1 8 2 � � � � � � � a a a sen V V C d d u d Rd ld d z � � � � �� vd d d d dd d zvd d d ,Re ) ( ) ( , ,Re ) cos( tan tan� � � � � sen C� � � � � � �tan tan tan ) ( , ,Re ) ( , ,Re ) ( d mc d i i N �� � � � � C b 1 (10) I M I M I P zv1 h1 P zv h2 P zv (�� ��) (�� ��) (�� ��) � � � � � � � � 2 3 � � � M I M h3 P zvn hn � (�� ��)� (11) 3 Airfoils and aerodynamic characteristics The rotor performances were tested using five airfoils: three symmetrical airfoils NACA 0012, 0015, 0018 and two cambered airfoils NACA 4415 and HLIFT18. Keywords: blade; data; fig; model; pitch; tan �; turbine; � �
• Load carrying capacity of masonry arch railway bridges at the serviceability limit state by Vokál, Marek; Drahorád, Michal (2022) - no. 2/2022 Load carrying capacity of masonry arch bridges at the SLS Δ Figure 1. no. 2/2022 Load carrying capacity of masonry arch bridges at the SLS 0 20 40 60 80 100 120 NelMat -0.15 -0.1 -0.05 0 0.05 0.1 0.15 e T h 4 F it eTh4Fit vs. NelMat fitted Figure 8. Keywords: analysis; arch; bridges; calculation; figure; linear; load; masonry; model; non
• Model Based Control of Moisture Sorption in a Historical Interior by Zítek, P.; Vyhlídal, T. (2005) - If x is the absolute humidity in kg of water per one kg of dry air, its value, corresponding to a certain given � and T, results, e.g., from the Magnus relationship (Camuffo, 1998), as follows x aT b T� � � �3795 10 103. ( )� , (4) where a � 7.5 and the additive temperature constant b � 237.3 °C. If a considerable change in relative humidity from �0 to � has occurred under x = const., the corresponding temperature change is relatively small, given as follows T T b T a0 0 0� � � �(log log )� � , (6) where, unlike (3), the decimal logarithm is used. Keywords: air; control; humidity; model; moisture; t �; temperature; � �
• Performance of a hydromagnetic squeeze film on a rough circular step bearing: a comparision of different porous structures by Adeshara, Jatinkumar V.; Patel, Hardik P.; Deheri, Gunamani B.; Patel, Rakesh M. (2022) - Hydromagnetic squeeze film in rough truncated conical plates, using the Kozeny-Carman-model-based spongy structure, was discussed by Adeshara et al. In this article, it has been sought to study and analyse the performance of hydromagnetic squeeze film on a rough circular step bearing with inclusion of two different porous structures: Kozeny-Carman and Irmay’s model. Keywords: figure; film; load; model; squeeze
• Physics Based Design, the Future of Modeling and Simulation by Ericsen, T. S. (2005) - 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: blocks; building; design; model; pebb; physics; power; requirement; simulation; system
• Design and Development of the Engine Unit for a Twin-Rotor Unmanned Aerial Vehicle by Avanzini, G.; D’Angelo, S.; Matteis, G. de (2005) - 5 Control system rapid prototyping After the realization of the rotor assembly and of the three-engine unit, which were separately ground tested, as reported in [4], ground testing of the whole engine/rotor sys- tem, coupled with the on-board computer for engine and rotor rpm control, will offer the first test benchmark for the control system software. As for the last point, details will be given on the control system for engine rpm control currently being tested on the vehicle prototype. Keywords: configuration; control; czech; design; engine; flight; model; rotor; system; technical; university; vehicle
• Simulation of UAV Systems by Kaňovský, P.; Smrcek, L.; Goodchild, C. (2005) - � �� � �L 1 2 2� (1) Moment equations � , � p I [3, 4]: Force equations � sin � u qw rv C V S m T m g v ru pw C V S m � � � � � � � � � � � D LF 1 2 1 2 2 2 � � �� T m g w qu pv C V S m T m g � � � � � � cos sin � cos cos . Keywords: autopilot; czech; design; fig; model; sensor; system; technical; uav; � �
• CFD modelling of a secondary settling tanks: generalization based on database relations by Švanda, Ondřej; Pollert, Jaroslav (2022) - This is very important to notice as this is actually the cumber stone of sludge settling models – they are fitted on very limited set of data representing usually only one flow condition. 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. Keywords: cfd; concentration; data; flow; model; sedimentation; settling; sludge; solids; solids concentration; sst; tank
• A Model of the Distribution of Wealth in Society by Lavička, H.; Slanina, F. (2005) - The distribution of wealth (Fig. 2) permits the power-law tail for p>pa (the same symbol is used as a consequence of the power-law behavior and the different social tension evolution) with exponent �0.96, which is stable for the interval of p at the thermodynamic limit N � ��, T � �� and N T con- stant. Pareto’s law states that the high end of wealth distribution fol- lows the power-law P(w) ~ w����, where exponent � is stable for an investigated country in a given period of time. Keywords: agents; distribution; law; model; power; wealth; � �
• Performance assessment of steel truss railway bridge with curved track by Venglár, Michal; Lamperová, Katarína; Sokol, Milan (2022) - IBIS-S interferometric radar was also used to measure bridge displacements. Therefore, administrators of railway networks around the world are the most responsible for ensuring the integrity of the networks with railway bridges being an integral part of these networks. Keywords: analysis; bridge; direction; displacements; fem; figure; model; railway; results; structure; track
• How to understand the structure of beta functions in six-derivative Quantum Gravity? by Rachwał, Lesław (2022) - (One sees due to the requirement of general covariance that this considera- tion of conformal gravitational theories makes sense only in even dimensions d of spacetime.) Asymptotic freedom and higher derivative gauge theories. Keywords: action; beta; case; conformal; derivative; derivative theory; functions; gauge; gravitational; gravity; level; loop; model; non; operator; quantum; quantum gravity; quantum theory; renormalizable; results; terms; theories; theory; uv divergences
• Rational extension of many particle systems by Mandal, Bhabani Prasad (2022) - 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: journal; laguerre; model; particle; physics; polynomials; systems
• Analysis of parameters important for indirect drying of biomass fuel by Sabatini, Michel; Havlík, Jan; Dlouhý, Tomáš (2022) - Schematic illustration of moisture content, drying rate, and material temperature. 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. Keywords: bed; biomass; coefficient; drying; heat; material; model; parameters; rate; surface
• Flow Visualisation by Condensing Steam – an Unusual Method Applied to Development of a Low Reynolds Number Fluidic Selector Valve by Tippetts, J. R.; Tesař, V. (2005) - 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. The task Present authors find flow visualization indispensable for their current development of no-moving-part fluidic devices, in particular flow control valves. Keywords: /qfactor; /quality; /vsamples; adobe; control; fig; flow; model; pdf; valve; water
• Theoretical analysis of the influence of the chevron inclination angle on the thermal performance of a gasket plate heat exchanger by Nogueira, Élcio (2022) - They consider that the model can predict essential performance char- acteristics in plate heat exchangers concerning the dimensions, angles of inclination of the corrugations, etc. In addition to the physical and geometric parameters, the most significant influ- ence on obtaining the results are Reynolds number, inlet temperatures, and heat exchanger plates. Keywords: angle; exchanger; fluid; heat; heat exchanger; heat transfer; model; number; plate; reynolds number; transfer
• Mixture Based Outlier Filtration by Pecherková, P.; Nagy, I. (2006) - ( ( ) ( ), , ) ( , ( ))� � � � � �� � �1 1 (2) to the mixture model (1) yields intractable posterior distribu- tion. i i c ( ( ), , ) ( , )� � � � �1 1 1 � � � � � � (1) where f ( )� � denotes conditional probability density function (pdf), d is modelled (and filtered) variable; dt is actual value at time t, �t�1 is a vector of historical data on which dt depends, � � � �� [ , , , ]1 2 � �c are parameters of individual components, � � � �� [ , , , ]1 2 � �c is a vector of components weights, c� is number of components. Keywords: component; data; filter; mixture; model; outliers; � �
• Self-interference cancellation in underwater acoustic communications systems using orthogonal pilots in IBFD by Naman, Hala A.; Abdelkareem, Ammar E. (2023) - Related works In this section, we cover the literature on communication channel models for multipath propagation and self-interference cancellation methods in full-duplex transmissions. SI channel model The channel coefficients and the magnitude channel impulse response, in seconds, for the Self node are generated based on the proposed modelr [20]. Keywords: channel; communication; duplex; figure; interference; model; self; signal; system; underwater
• 3D CFD model for the analysis of the flow field through a horizontal axis wind turbine (HAWT) by Menasri, Noureddine; Zergane , Said; Aimeur, Noureddine; Amour, Aissa (2023) - [31] conducted a study on the aero- dynamic efficiency of wind turbine blades in a wind tunnel. The simulation results in this study, partic- ularly the analysis of pressure coefficients, provide valuable insights into the performance and design optimisation of wind turbine blades. Keywords: analysis; axis; blade; cfd; design; energy; figure; flow; model; pressure; turbine; turbine blade; wind; wind turbine
• The classification of eye diseases from fundus images based on CNN and pretrained models by Benbakreti, Samir; Benbakreti, Soumia; Ozkaya, Umut (2024) - Computer-aided diagnosis using deep neural networks is a promising approach, it can analyse and process retinal fundus images, providing valuable reference data for doctors in clinical diagnosis or screening. Keywords: Eye diseases classification, retinal fundus images, deep learning, pretrained models, SGDM. Keywords: accuracy; classification; cnn; dataset; diseases; eye; fundus; images; learning; model; network; optimiser; resnet; results; training; vgg
• Fuzzy Concepts in the Detection of Unexpected Situations by Bíla, J.; Jura, J. (2007) - The following subsections introduce three examples of MSS and MSF and MD(UX3). 3.2 MD(UX3) with an emergence zone MSS has (in this case) the form (6) MSS S M S� � � �� � � , ( ), , , ( , ( ( , ) ))s s� � , (6) where S represents a basic set of situations, M(S) is a matroid constructed on this set of situations, � is a Basis on M(S), � represents a Cover on M(S) (a subset of the matroid closure), �( , )s � is a metric function and � is a positive real number. 1): h g of h g of1 1 1 1� �, ,� � n n (1) This brief explanation of essential concepts for the theory of UX3 situations introduced above will be extended and supplemented by a formal description and a recent applica- tion of this theory in section 3. Keywords: detection; model; msf; mss; situations; system; ux3; � p; � �
• Parametric optimisation of laser welding of stainless steel 316L by Butt, Adnan Qayyum; Tayyaba, Qanita; Raza, Muhammad Ali; Rehman, Abdul; Khan, Tayyab Ali; Shahzad, Muhmmad (2024) - The importance of laser welding is increasing tenfold in industry due to the higher spectrum of energy available in laser welding operations Effect of laser welding parameters on fusion zone shape and solidification structure of austenitic stainless steels. Keywords: beam; figure; heat; laser; laser welding; materials; model; parameters; power; process; stainless; steel; welding; width; zone
• Simulation of wind flow around an alternative flat-roofed fortress tower ruin by Poliak, Martin; Franek, Michal; Gregorová, Jana (2025) - × 10−4 −5 % −1.67 × 10−4 −11 % 2.68 × 10−5 0 % D3 2.16 × 10−3 20 % −6.61 % D1 0.601 −100 % 0.04 25 % 0.046 −9 % 0.078 −24 % D2 0.113 −19 % 0.029 18 % 0.089 −18 % 0.077 −23 % D3 0.037 −6 % 0.021 13 % 0.071 −15 % 0.055 −17 % D4 0.016 −3 % 0.015 10 % 0.062 −13 % 0.046 −14 % D5 −0.007 1 % −0.001 −1 % 0.017 −3 % 0.011 −3 Keywords: alternative; changes; cpe; flow; head; mean; model; roof; ruin; ruin model; surface; table; values; wind
• Reverse engineering of pump as turbine for CFD analysis by Souček, Jiří; Bílková, Eva; Nowak, Petr (2024) - In this way, the turbine power, or turbine efficiency, was calculated (Table 1). Development and implementation of a methodology for reverse engineering design of Francis turbine runners. Keywords: cavitation; cfd; efficiency; engineering; figure; model; parts; pressure; pump; runner; turbine
• Experimental investigation of flow characteristics and performance parameters of a podded aft engine air intake by Amiri, Human; Küçük, Umut Can; Kuşcu, Yiğit Fırat (2023) - Air intake performance Inlet flow performance indicators, which are analysed in this study, are as follows: a) Total pressure recovery, b) total pressure distortion, c) mass flow ratio. Among the aeronautical engineers, this metric is known as total pressure distortion and is expressed either circumferentially or radially. Keywords: aip; aircraft; aoa; configuration; distortion; engine; figure; flow; inlet; intake; mass; model; nozzle; pressure; total
• Application of an artificial intelligence segmentation for deep hyperthermia treatment planning in the pelvic region by Drizdal, Tomas; Novak, Marek (2023) - SAR volume cumulative histograms of pancreas and whole patient model for complete seg- mentation model (organs) and for model with organs assigned as muscle (muscle). from complete segmentation model including internal organs. |dTHQ| = ∣∣∣∣ (THQmuscle − THQorgans THQorgans ) ∣∣∣∣ × 100 (1) where |THQmuscle| is the THQ value obtained using muscle patient model and |THQorgans| value obtained 0 25 50 75 100 norm. Keywords: antenna; htp; hyperthermia; journal; model; muscle; organs; patient; region; segmentation; treatment
• Refactorisation methods for TTCN-3 by Eros, L.; Bozoki, F. (2007) - We have concentrated on refactoring TTCN-3 source codes. No. 4–5/2007 Fig. 8: Original and refactorised TTCN-3 source codes Keywords: model; node; source; ttcn-3; value
• The effect of a malfunctioning braking system on the behaviour of a special vehicle during an emergency braking in a curvilinear movement by Simiński , Przemysław; Neumann, Vlastimil; Svoboda, Pavel; Cibulová, Klára; Vnuk, Radovan (2024) - ABS pressure modulator model together with the control unit (one for each of the four-wheel groups), (5.) brake mechanism model (for each wheel), (6.) vehicle model, (7.) Load restraining on road vehicles – Safety – Part 1: Calculation of securing forces, 2010. Keywords: braking; characteristics; figure; model; road; surface; system; time; vehicle; wheels
• Knowledge and technology transfer in construction engineering: two case studies involving special concrete by Michel-Schneider, Ulrike; Palazzo, Andrea (2025) - Technology transfer process Technology transfer process of MOB-Bars. cense because they wanted to have control over their invention. Keywords: carbocon; cases; concrete; construction; ctu; engineering; industry; innovation; knowledge; ktt; model; process; research; researchers; start; study; technology; transfer; tud; university
• Assessment of the effects of UV-A exposure on the mechanical strength of offshore mooring multifilaments by da Cruz, Daniel Magalhães; Stumpf, Felipe Tempel; Vassoler, Jakson Manfredini; Guilherme, Carlos Eduardo Marcos (2025) - https://doi.org/10.4043/17510-MS [7] T. M. Schmidt, C. Bianchini, M. M. C. Forte, et al. Socketing of polyester fibre ropes with epoxy resins for deep-water mooring applications. There are indications that degradation by ultraviolet exposure for Aramid, HMPE, polyamide, and polyester fibres, restricts the constitutive behaviour in terms of strength and extension, but without changing the shape of the curve. Keywords: aramid; degradation; exposure; extension; fibres; figure; force; hmpe; lcp; materials; model; mooring; polyamide; polyester; strength; ultraviolet; uv exposure
• Some remarks on a mathematical model for water flow in porous media with competition between transport and diffusion by Runcziková, Judita; Chleboun, Jan; Gavioli, Chiara; Krejčí, Pavel (2025) - In [7], a comparative analysis is made between vertical water flow models derived from numerical solutions of the Richards equation and reservoir cascade schemes used in hydrological modelling. For application to regional water flow models within catchment areas, more complex model formula- tions are required. Keywords: diffusion; flow; model; saturation; value; water
• A Comparative Study of Breast Cancer Detection and Recurrence Prediction Using CatBoost Classifier by Abdu-aljabar, Rana Dhia’a; Aljafaar, Khansaa Dheya; Ameen, Zinah Jaffar Mohammed; Naman, Hala A. (2025) - In 2019, breast cancer accounted for over one-third of all cancer cases in women in Iraq. Keywords: CatBoost classifier, breast cancer, machine learning, bioinformatic. Keywords: auc; bayes; breast; cancer; catboost; dataset; learning; machine; model; recurrence; xgboost

• EU Emissions Trading Scheme as Implemented in the Czech Republic by Chmelík, T.; Zámyslický, P. (2007) - The system is based on the following five pillars: � Allocation (a system of distribution of emission allowances to participants, based on harmonized criteria). 2.1 Sectoral coverage A simple comparison shows that some sectors, while hav- ing almost the same number of installations, have a much smaller share of total emissions. Keywords: allocation; allowances; czech; emissions; system
• Enhanced electric vehicle charging topology with integrated fuzzy-based shunt converter by Kotla, Rahul Wilson; Yarlagadda, Srinivasa Rao; Mannala, Kumudwathi; Sreek, Dharani; Sivarathri, Vijaya Madhavi (2025) - A review of battery energy storage systems and advanced battery management system for different applications: Challenges and recommendations. Advanced charging system for EV The diagram of an Enhanced Electric Vehicle Charg- ing System (EVCS) is shown in Figure 1. Keywords: battery; charging; control; converter; energy; figure; flc; power; shunt; system; voltage
• The Precision Simulation of the First Generation Matrix Converter by Bednář, M. (2008) - Keywords: Matrix converter, real-time system, simulation, energy conversion. All the system parts are 66 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 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: converter; fig; matrix; simulation; switching; system
• Space Variant PSF – Deconvolution of Wide-Field Astronomical Images by Řeřábek, M. (2008) - 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; fig; image; psf; system; � �
• An Intelligent System for Structural Analysis-Based Design Improvements by Novak, M.; Dolšak, B. (2008) - 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: analysis; design; engineering; hole; knowledge; process; system; vol
• Prague’s Sewerage System in the 1930’ and the General Sewerage Project (1933–1936) by Drnek, K. (2010) - 1: Picture of the original “Máslo-Douda” project While the Douda-Máslo project was passing through the authorization procedures, Ing. Zika, the chief of Prague’s sewers, introduced new projects to build sewage plants with biological purification either in Řež or on Imperial Island. [1] Keclík, T.: The competition on a general project for new sewage plants for the capital city Prague. Keywords: ing; plant; project; sewage; sludge; system
• Assembly of a Pulmonary Artery Pressure Sensor System by Müntjes, J.; Meine, S.; Flach, E.; Görtz, M.; Hartmann, R.; Schmitz-Rode, T.; Trieu, H. K.; Mokwa, W. (2010) - 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: carrier; fig; pressure; sensor; system
• The DEPFET Mini-matrix Particle Detector by Scheirich, J. (2010) - Clear- performance of linear DEPFET devices. A Photo of the Measuring System 73 Acta Polytechnica Vol. 50 No. 4/2010 4 Conclusions A measuring system has been designed for the DEPFET Mini-matrix particle detector. Keywords: current; depfet; detector; fig; gate; noise; system
• Aharonov-Bohm Effect and the Supersymmetry of Identical Anyons by Jakubský, V. (2010) - By contrast, the system described by H0α,− allows singular wave functions. This time, the hard-core interaction appears in both systems (neither H0+ nor HAB − has singular wave functions in its domain). Keywords: anyons; system; wave
• X-ray Transient Sources (Multifrequency Laboratories) The Case of the Prototype A0535+26/HDE 245770 by Giovannelli, F.; Sabau-Graziati, L. (2011) - 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 review by Giovannelli & Sabau-Graziati (1992) — occur just after ∼ 8 days. Keywords: days; et al; giovannelli; outbursts; ray; star; system
• Advanced Processing of Images Obtained from Wide-field Astronomical Optical Systems by Řeřábek, M.; Páta, P. (2011) - 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; data; error; image; psf; system; wavefront
• Searching for Space Debris Elements with the “Pi of the Sky” System by Sokołowski, M.; Należyty, M.; Majczyna, A.; Wawrzaszek, R.; Wajer, P. (2011) - RMS 4750 = 1800’’satR Night 20070526 MC Distance to closest satellite : night 20070526 and MC Fig. Keywords: space debris, robotic telescopes, satellite observations, satellite tracking, optical transients. Keywords: debris; elements; objects; satellites; sky; space; system
• MAIA: Technical Development of a Novel System for Video Observations of Meteors by Vítek, S.; Fliegel, K.; Páta, P.; Koten, P. (2011) - 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: camera; image; intensifier; lens; system
• Determining the Position of Head and Shoulders in Neurological Practice with the use of Cameras by Kutílek, P.; Hozman, J. (2011) - Head position was measured with precision of 0.5◦ in three planes (rotation-yaw, flexion-pitch and inclination-roll) [5], two cameras are required for determining head positions. Keywords: axis; cameras; head; position; profile; rotation; system
• Unobtrusive Non-Contact Detection of Arrhythmias using a “Smart” Bed by Brueser, Ch. (2011) - Our work prepares the way for future research on fully automatic algorithms for detecting arrhyth- mias in BCG signals. [9, 10] as well as optical de- vices [11], BCG systems have been integrated into objects of daily life, such as beds [4–12], chairs Keywords: arrhythmias; bcg; bed; ecg; heart; sensor; signal; study; system; vol
• Chaos in GDP by Kříž, R. (2011) - 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 Correlation dimension (DC) describes the dimension- 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. Keywords: exponent; gdp; phase; space; system; time
• Advances in Modern Capacitive ECG Systems for Continuous Cardiovascular Monitoring by Schommartz, A.; Eilebrecht, B.; Wartzek, T.; Walter, M.; Leonhardt, S. (2011) - [10] Aleksandrowicz, A., Leonhardt, S.: Wireless and non-contact ECG measurement system — the Aachen SmartChair. This principle can also achieve interference reduction in capacitive ECG measurements. Keywords: aachen; cecg; ecg; electrodes; engineering; germany; measurements; system; vol
• Influence of the Lossy Compression JPEG2000 standard on the Deformation of PSF by Páta, P. (2011) - Image compression based on the wavelet transform is nowadays very popular because of its nice properties. Keywords: Astronomical lossy image compression, PSF deformation, Astronomical Context Coder (ACC), JPEG 2000. Keywords: compression; function; image; system
• Pi of the Sky Telescopes in Spain and Chile by 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. (2011) - The prototype is equipped with two custom-designed 442A 2 048 × 2 048 CCD cameras equipped with Canon telephoto lenses with focal length f = 85 cm, f/d = 1.2 and covering a 20◦×20◦ field of view. 4: Mount design with 2 CCD cameras (prototype in Chile)(left) and for 4 CCD cameras (new detector unit in Spain) Keywords: cameras; detector; prototype; sky; system; warsaw
• Optimization of Fuzzy Logic Controller for Supervisory Power System Stabilizers by Al-Turki, Y. A.; Attia, A.-F.; Soliman, H. F. (2012) - B. Coding of fuzzy set parameters The coded parameters are arranged on the basis of their constraints, to form a chromosome of the pop- ulation. Thus, the aim of fuzzy control systems is to replace a skilled hu- man operator with a fuzzy rules-based system. Keywords: adaptive; generator; parameters; pss; rules; set; sets; sflc; system
• A Flexible Adjustment and Control System for Hydraulic Machines by Banyai, Daniel; Marcu, Lucian (2012) - 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 [4]. Keywords: control; flow; hydraulic; pressure; pump; system
• An Application of the Individual Channel Analysis and Design Approach to Control of a Two-input Two-output Coupled-tanks System by Murray-Smith, David J. (2012) - 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: channel; control; design; figure; input; level; line; results; simulation; system; tank
• Hygiena 3, a Forgotten Project for Electrolytic Water Treatment by Drnek, Kryštof (2012) - Last but not least, there was the problem of electrolytic water treatment. The sludge taken in treatment process must not decompose, sand from the sand pool must contain not more than 10% of dry residue, and the sludge from the sedi- mentation tank must contain not more than 91% of water. Keywords: city; project; sludge; system; treatment; water
• Accelerometer-assisted PPG Measurement During Physical Exercise Using the LAVIMO Sensor System by Santos, Susana Aguiar; Venema, Boudewijn; Leonhardt, Steffen (2012) - 81 Acta Polytechnica Vol. 52 No. 5/2012 Figure 3: Obtained ECG and PPG signals of a healthy subject at 0 km/h. 2.4 Strategies for reduction of movement artifacts The corruption of a PPG signal through light or move- ment of the subject is a limiting factor in a PPG system. Nevertheless, using the 3-axis accelerometer data recorded together with the PPG measurements, it should be possible to extract a ‘clean’ Figure 4: Obtained ECG and PPG signals of a healthy subject walking at 2 km/h. PPG from a PPG with artifacts. Keywords: accelerometer; activity; artifacts; ecg; ppg; sensor; signal; system
• Control Algorithms for Large-scale Single-axis Photovoltaic Trackers by Schneider, Dorian (2012) - Keywords: single-axis solar tracker, backtracking, photovoltaic, sun tracking. Tracking and backtracking angles, sun azimuth and elevation plotted for January 1st, 2012 in Berlin. Keywords: angle; axis; rotation; sat; sun; system; tracking; yield
• Integration of Autonomous UAVs into Multi-agent Simulation by Selecký, Martin; Meiser, Tomáš (2012) - The system also does not allow the co- existence of hardware UAVs together with simulated UAVs. For this reason mixed reality simulations, which allow integration of real hardware UAVs and simulated virtual UAVs to co-exist in one environ- ment, are helpful and necessary in the development process. Keywords: agent; collision; figure; flight; hardware; system; time; uavs; wind
• Synthesis of Mechanisms by Methods of Nonlinear Dynamics by Valášek, Michael; Šika, Zbynek (2012) - (yA − yB)2 + (zA − zB)2 , cosϕ = xD x2 D + z2 D , (20) `AB = √ (xA − xB)2 + (yA − yB)2 + (zA − zB)2, 0 = xA(xB − xA) + yA(yB − yA). In addition, the constraints (20) have been changed into the form cosψ = zB − zA√ (xB − xA)2 + (yB − yA)2 + (zB − zA)2 , cosϕ = xD√ x2 D + z2 D , (24) `AB = √ (xB − xA)2 + (yB − yA)2 + (zB − zA)2, 0 = xA(xB − xA) + yA(yB − yA), ϕi = const., ψi = const. Keywords: dimensions; j=1; mechanism; method; parameters; positions; synthesis; system
• Massive Parallelization of Multibody System Simulation by Valášek, Michael; Mráz, Ladislav (2012) - + `i sϕi, (6) and their time derivatives xBi = xi + `iϕ̇i cϕi, yBi = yi + `iϕ̇i sϕi, (7) Rewriting the EOM for the whole system using the equations of motion of single bodies obtained previously, the mass matrix (system matrix) has a block-diagonal structure (8), where each block corre- sponds to one body. 6/2012 Massive Parallelization of Multibody System Simulation Michael Valášek, Ladislav Mráz Department of Mechanics, Biomechanics and Mechatronics, Faculty of Mechanical Engineering, Czech Technical University in Prague Technická 4, 166 07 Praha 6, Czech Republic Corresponding author: Michael.Valasek@fs.cvut.cz Abstract This paper deals with the decrease in CPU time necessary for simulating multibody systems by massive parallelization. Keywords: body; dynamics; matrix; solution; system
• Systems of Electronic Overcurrent Protection in Pulse Power Generator Operating on Plasma Load by Godun, Dmitriy V.; Bordusov, Sergey. V.; Dostanko, Anatoliy P. (2013) - The fast-acting complex protection system of pulse power generator is to ensure its blocking with the lapse of time not exceeding 100 nanoseconds. The application of fast-acting optical systems of data transfer in the composition of the current and thermal protection circuits allows to block the op- eration of pulse power generator with the lapse of time not exceeding 100 nanoseconds. Keywords: current; power; protection; pulse; system
• Characterization of Human Gait using Fuzzy Logic by Kutilek, Patrik; Viteckova, Slavka; Svoboda, Zdenek (2013) - 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. toolboxes Keywords: angle; cyclogram; gait; inclination; speed; system; type; walking
• Clock Math — a System for Solving SLEs Exactly by Hladík, Jakub; Lórencz, Róbert; Šimeček, Ivan (2013) - 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 (modm); • 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: equations; gpu; linear; matrix; solving; system; vector
• On the Solvability of Some Partial Differential Inequality by Himmel, Martin (2013) - 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 = −divX (16) and a Dulac function is an invariant function with cofactor k = − divX + 1 f · g, (17) 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 having a positive sign in Ω except on a set of Lebesgue measure zero such that the equation div(BX) Keywords: differential; dulac; function; system; vector
• Developing Control and Monitoring Software for the Data Acquisition System of the COMPASS Experiment at CERN by Bodlák, Martin; Jarý, Vladimír; Konorov, Igor; Mann, Alexander; Nový, Josef; Paul, Severine; Virius, Miroslav (2013) - System stability. From the functionality point of view, the DATE package provides data flow control, event building, data quality monitoring, event sampling, information reporting, interactive configuration, and run control. Keywords: compass; control; data; dim; experiment; message; server; software; system
• Particle Dynamics in the RMP Ergodic Layer under the Influence of Edge Plasma Turbulence by Kurian, Matúš; Krlín, Ladislav; Cahyna, Pavel; Pánek, Radomír (2013) - Since this procedure can be performed for particles of various mass, it is possible to compare the effect of electrostatic perturbation on heavy and light particles. The lower threshold of the effect of electrostatic perturbation on lithium is at 0.1-0.5V, and this matches well with the results obtained for carbon ions and protons. Keywords: diffusion; effect; particles; perturbation; potential; system; trajectories
• Application of Portable Force Platforms Equipped with a Device for Measuring Position and Orientation by Kutílek, Patrik; Vítečková, Slávka; Svoboda, Zdeněk; Hejda, Jan (2013) - We have designed and tested a new universal way to study the forces under the feet based on force platforms equipped with a device for measuring position and orientation. This technique uses force platforms to measure the forces exerted by the subject’s feet [4]. Keywords: cop; cop position; force; force platforms; orientation; platforms; position; system
• THE NA62 EXPERIMENT AT CERN AND THE MEASUREMENT OF THE ULTRA-RARE DECAY K⁺→π⁺ v ̄v by Antonelli, Antonella (2013) - The Level 0 (L0) trigger algorithm is based on the presence of a charged particle in the RICH and veto conditions on LKr, LAV and muon veto detector, and is performed by dedicated custom hardware modules, with a maxi- mum output rate of 1MHz and a maximum latency of 1ms. Rejection of background from nuclear interactions of charged beam particles other than K+ will be guar- anteed by a differential Cherenkov counter (CEDAR) placed before kaons enter the decay region: Cherenkov photons radiated in a 6m long vessel, filled with he- lium gas, are focussed by an optimised optical system on eight fast PMTs. Keywords: beam; level; na62; system; veto
• A COMPUTER CLUSTER SYSTEM FOR PSEUDO-PARALLEL EXECUTION OF GEANT4 SERIAL APPLICATION by Federici, Memmo; Martino, Bruno L. (2013) - • 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: cluster; geant4; simulation; software; system; user
• A LIGHTNING CONDUCTOR MONITORING SYSTEM BASED ON A WIRELESS SENSOR NETWORK by Mikeš, Jan; Kreibich, Ondrej; Neužil, Jan (2013) - 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: buildings; lightning; node; prague; protection; sensor; strikes; system
• CONTROL OF THE DOUBLE INVERTED PENDULUM ON A CART USING THE NATURAL MOTION by Neusser, Zdenek; Valášek, Michael (2013) - 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: cart; control; motion; pendulum; position; system
• EXCEPTIONAL POINTS IN OPEN AND PT-SYMMETRIC SYSTEMS by Eleuch, Hichem; Rotter, Ingrid (2014) - Exceptional points (EPs) determine the dynamics of open quantum systems and cause also PT symmetry breaking in PT symmetric systems. Keywords: exceptional points, open quantum systems; PT symmetry breaking, dynamical phase transition, non-Hermitian quantum physics, phase rigidity. Keywords: eigenfunctions; eigenvalues; eps; quantum; states; symmetric; system
• A MYOELECTRIC PROSTHETIC ARM CONTROLLED BY A SENSOR-ACTUATOR LOOP by Kutílek, Patrik; Hýbl, Jan; Mareš, Jakub; Socha, Vladimír; Smrčka, Pavel (2014) - Keywords: prosthetic arm; electromyography; sensor system; occupancy grid mapping; fuzzy logic. [26, 27]: Map(x, y, z)′ = ps Map(x, y, z) ps Map(x, y, z) + (1− ps)(1−Map(x, y, z)) , where Map(x, y, z)′ represents an updated value of the cell in position [x, y, z] after integration of a new sensory reading into the map, Map(x, y, z) represents the previous value, and ps = P [ Map(x, y, z) = OCC ∣∣ {r}] is the probability that the cell is occupied (OCC) according to sensor range reading r, i.e., the sensor model (Fig. 4). Keywords: arm; control; emg; envelope; map; myoelectric; pds; sensor; signal; system
• Determining the Permeable Efficiency of Elements in Transport Networks by Svoboda, V.; Šiktancová, D. (2001) - 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: network; permeability; system; time; transport
• OBLIQUE MAGNETIC FIELDS AND THE ROLE OF FRAME DRAGGING NEAR ROTATING BLACK HOLE by Karas, Vladimír; Kopáček, Ondřej; Kunneriath, Devaky (2014) - Keywords: accretion; black holes; gravitation; magnetic fields. Their dynamic properties (e.g., resonances) will therefore leave their imprint on the observed spectra. 399 V. Karas, O. Kopáček, D. Kunneriath, J. Hamerský Acta Polytechnica The role of magnetic fields near strongly gravitating objects has been the subject of many investigations Keywords: accretion; black; chaos; electromagnetic; equatorial; field; hole; karas; kerr; motion; particles; rotating; structure; system; test
• ELIMED: MEDICAL APPLICATION AT ELI-BEAMLINES. STATUS OF THE COLLABORATION AND FIRST RESULTS by 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 (2014) - Proton beams with energy up to 60 MeV will be produced. Proton beams with energy up to 100 MeV will be produced. Keywords: beam; beamlines; eli; elimed; energy; laser; mev; proton; system
• COMPARATIVE MEASUREMENTS OF HEAD ANGULAR MOVEMENTS USING A CAMERA SYSTEM AND A GYROSCOPE SYSTEM by Socha, Vladimir; Kutilek, Patrik; Cakrt, Ondrej; Cerny, Rudolf (2014) - These include: mean displacement velocity, total length of the CoP trajectory, movement area, planar deviation, etc. Keywords: head orientation, camera system, orientation tracker, pitch versus roll plots. Keywords: mean; pitch; roll; subjects; system; traces; velocity
• A SYSTEM AND A DEVICE FOR ISOLATING CIRCULATING TUMOR CELLS FROM THE PERIPHERAL BLOOD IN VIVO by Mego, Michal; Kocifaj, Miroslav; Kundracik, František (2015) - 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: blood; cells; ctcs; magnetic; nanoparticles; system; tumor; wire
• Colorimetry and TV Colour Splitting Systems by Kaiser, J.; Košťál, E. (2001) - The ideal spectral reflectances of the partial filters of the XYZ prism are � � � �Ay � �� �y (4) � � � � � �� �Bx � � �� � � �x y1 (5) � � � � � � � �� �Cz � � � �� � � � � �z y x1 . � � � �� �y � �Ay (1) � � � � � �� �� � �x � � �Bx Ay1 (2) � � � � � �� � � �� �� � � �z � � � �Cz Ay Bx1 1 (3) Keywords: b �; functions �; system; z �; � g; � r; � x; � y; � �
• Conceptual Design of a Hydraulic Valve Train System by Pohl, J.; Warell, A.; Krus, P.; Palmberg, J.-O. (2001) - 12: Opening of check-valve, main stage and solenoid valves and corresponding oil flows for the FluMeS-system 10.0 8.0 6.0 4.0 2.0 0.0 -2.0 15.0 10.0 5.0 0.0 2.00 10× -2 1.50 10× -2 1.00 10× -2 5.00×10 -3 0.00 Time [s] V a lv e o p e n in g [m m ] In p u ts ig n a l [V ] Inputsignal Fig. 13: Simulated (dashed) and given valve opening for Fords- -system as well as input signals to the solenoid valves for an engine speed of 6000 rpm Check valve 1.20 1.00 0.80 0.60 0.40 0.20 0.00 10.0 8.0 6.0 4.0 2.0 0.0 2.00×10 -2 1.50 10× -2 1.00 10× -2 5.00 10× -3 0.00 Time [ms] C h e c k -. 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. Keywords: concept; design; engine; function; oil; pressure; simulation; solenoid; system; train; valve
• Analysis of a Thermal Plasma Diamond CVD System by Kolman, D. (2001) - 3: Contours of the axial velocity and enthalpy for a laminar, Prandtl and k-� turbulent plasma jet 3 Turbulent flow modeling Modeling of the turbulence was approached in two ways: (1) Using Prandtl’s free shear layer model for eddy viscosity 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. Keywords: jet; plasma; system; temperature; torch; velocity
• Large-scale File System Design and Architecture by Dynda, V.; Rydlo, P. (2002) - Data Dependency Edges T Tj i k i� , if � � � �writeset readsetT Tj i k i� � 0, j < k. 2. Precedence Edges T Tj i k i� , if � � � �readset writesetT Tj i k i� � 0, j < k. Both types of edges demonstrate that the transaction processing order has influenced the computation result. Keywords: data; file; managers; node; replica; replication; system; � �
• System Framework for the Design of an Avionics Architecture with Upgrade Potential by Rao, N.; Kusumo, R.; Sinha, A. K.; Scott, M. L. (2002) - 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: architecture; avionics; design; parameters; potential; system; upgrade
• Concept Design and Reliability by Cooper, G.; Thompson, G. (2002) - 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. Existing reliability evaluation methods are reviewed with respect to their suitability for use in concept design. Keywords: analysis; concept; design; fig; performance; process; reliability; safety; specification; system; tools; � �
• ADAPTIVE DISTRIBUTION OF A SWARM OF HETEROGENEOUS ROBOTS by Prorok, Amanda; Ani Hsieh, M.; Kumar, Vijay (2016) - 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]). 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=1N (s) = N . Keywords: distribution; k(s; optimization; robot; species; system; time; trait; transition
• SYSTEM FOR MEASURING KINEMATICS OF VESTIBULAR SYSTEM MOVEMENTS IN NEUROLOGICAL PRACTICE by Volf, Petr; Kutílek, Patrik; Hozman, Jiří; Černý, Rudolf; Koukolík, Tomáš; Hejda, Jan (2016) - Keywords: kinematics, vestibular system, head movement, gyroscope, accelerometer. Even though these systems are com- monly used for vestibular system examinations, they are not able to detect its movements directly. Keywords: accelerations; gyro; head; labyrinth; left; movement; plate; right; rotation; system
• Reliability of Human Subject - Artificial System Interactions by Novák, M.; Faber, J.; Votruba, Z.; Přenosil, V.; Tichý, T.; Svoboda, P.; Tatarinov, V. (2002) - However, as concerns the reliability of interactions between human subjects and artificial systems, only the last approach seems truly able to minimize the frequency of system operation failures caused by human error and failure © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 31 Acta Polytechnica Vol. 42 No. 3/2002 Reliability of Human Subject – Artificial System Interactions M. Novák, J. Faber , Z. Votruba, V. Přenosil, T. Tichý, P. Svoboda, V. Tatarinov Main problems related to reliability of interaction between human subject and artificial system (namely of the transportation character) are discussed. All these factors combine, with the result that the reliability of human subject – artificial system interaction is limited, above all from the human side. Keywords: attention; interaction; micro; operator; reliability; sleep; subject; system; time; vol; � �
• EVALUATION OF THE APPLICATION OF A THERMAL INSULATION SYSTEM: IN-SITU COMPARISSON OF SEASONAL AND DAILY CLIMATIC FLUCTUATIONS by Fořt, Jan; Beran, Pavel; Konvalinka, Petr; Pavlík, Zbyšek; Černý, Robert (2017) - 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 Importance of the maintenance of ambient air is connected not only with comfort of building occupants, but also with health issues. Keywords: application; building; conditions; doi:10.1016; energy; humidity; insulation; monitoring; profiles; system; temperature
• A Multi-Agent Mah Jong Playing System: Towards Real-Time Recognition of Graphic Units in Graphic Representations by Achten, H.; Jessurun, J. (2003) - The paper presents the tkeoretical basis ojgraphic units and multi-agents systems, Jollowed by a description ojthe multi-agent framework and its implementation. The technology we are looking at is multi-agent systems. Keywords: agent; bones; design; drawing; heuristics; level; mah; multi; system; units; vol
• Twenty Years of Microtron Laboratory Activities at CTU in Prague by Vognar, M.; Šimáně, Č.; Chvátil, D. (2003) - The arrangement enabled radiation beams with a high quality index (Fig. 7) to be obtained, and homogeneous 10 x IOcm2 photon and eIec­ tron fields precise to 65 % to be generated, complying with the ICRP IAEA standards (Fíg. This r..-.6 to us an appropriate moment to summarize n,rrenty years of history of microtron laboratory activities at CTU in'prague. Keywords: acta; beam; czech; dose; electron; fields; fig; gamma; laboratory; microtron; prague; production; radiation; system; vognar; vol; šimáně
• A General Approach to Study the Reliability of Complex Systems by Repici, G. M.; Sorniotti, A. (2003) - 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: analysis; control; data; design; fig; functions; hardware; reliability; results; safety; software; system; vehicle
• PLATFORM WITH CAMERA SYSTEM FOR MEASUREMENT OF COMPENSATORY MOVEMENTS OF SMALL ANIMALS by Kutílek, Patrik; Škoda, David; Hýbl, Ján; Černý, Rudolf; Frynta, Daniel; Landová, Eva; Frýdlová, Petra; Kurali, Aniko; Doskočil, Radek; Křivánek, Václav (2017) - 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) Keywords: angles; animal; body; camera; control; data; head; markers; movement; pixels; platform; platform movement; system; unit
• To Whom Belongs Conceptual Design? by Bíla, J. (2003) - No. 412009 To Whom Belongs Conceptual Design? J. Bfla Th.e lieLd of Conceptual lytlry is aery alfue and is rapidly deteloping. 2 Semiotics, formal logic and evolutionary models The outcome of the process of Conceptual Design (in technological fields) is usually undersrood tobe a scheme. Keywords: cdp; concepts; design; emergence; engineering; knowledge; means; modelling; ontologies; process; research; space; support; system; uml; vol
• THE ANALYSIS OF IMAGES IN N-POINT GRAVITATIONAL LENS BY METHODS OF ALGEBRAIC GEOMETRY by Kotvytskiy, Albert; Bronza, Semen; Shablenko, Vladimir (2017) - − x2 2y1 − x1 = 0, x2 1x2 + x3 2 − x2 1y2 − x2 2y2 − x2 = 0. (9) We calculate the result R1 by the variable x1 for which we represent the equation in lexicographic form{ x3 1 Keywords: lens; point; set; system
• Experimental Evaluation of Mountain Bike Suspension Systems by Titlestad, J.; Fairlie-Clarke, T.; Davie, M.; Whittaker, A.; Grant, S. (2003) - 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 [1]. Keywords: bicycle; bumps; rear; results; roller; suspension; suspension system; system; tests; wheel
• APPLICATION OF CORROSION PLATES IN DRINKING WATER by Skalický, Michal (2018) - Acta Polytechnica doi:10.14311/AP.2018.58.0209 Acta Polytechnica 58(3):209–216, 2018 © Czech Technical University in Prague, 2018 available online at http://ojs.cvut.cz/ojs/index.php/ap APPLICATION OF CORROSION PLATES IN DRINKING WATER Michal Skalický∗, Pavel Buriánek Czech Technical University in Prague, Department of Sanitary and Ecological Engineering, Czech Republic ∗ corresponding author: michal.skalicky@fsv.cvut.cz Abstract. Corrosion rate evaluations according to consecutive intervals — June 25th–September 17 2013 (0–82 days) and September 17th–December 2nd 2013 (0–76 days) Keywords: corrosion; corrosion rate; drinking; drinking water; evaluation; exposure; plates; rate; system; water; weight
• EVALUATION OF SENSOR SIGNAL PROCESSING METHODS IN TERMS OF INFORMATION THEORY by Flegner, Patrik; Kačur, Ján (2018) - 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. We can define the sketched problem of “data mining” from signal sensors in terms of information theory and signal theory. Keywords: amplitude; analog; bit; entropy; information; measurement; measuring; processing; sensor; signal; spectrum; system
• INFORMATION AND ANALYTICAL SYSTEM FOR HAZARD LEVEL ASSESSMENT AND EMERGENCY RISK FORECASTING by Yemelin, Pavel V.; Kudryavtsev, Sergey S.; Yemelina, Natalya K. (2019) - The implementation of this system will allow services of occupational safety to process and systematize all incoming information about industrial subdivisions and the enterprise as a whole, analyse and manage industrial risks, and monitor the level of industrial safety within the enterprise. The Information and Analytical System for Hazard Level Assessment and Forecasting Risk of Emergencies in the Republic of Kazakhstan allows users to work efficiently with large volumes of information and form a united analytical electronic report about the state of industrial safety. Keywords: assessment; hazard; information; kazakhstan; republic; risk; safety; system
• DYNAMIC SMART GRID COMMUNICATION PARAMETERS BASED COGNITIVE RADIO NETWORK by Haider, Haider Tarish; Muhsen, Dhiaa Halboot; Shahadi, Haider Ismael; See, Ong Hang; Elmenreich, Wilfried (2019) - 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]. This paper presents a cognitive radio decision engine that dynamically selects optimal radio transmission parameters for wireless home area networks (HAN) of smart grid applications via the multi-objective differential evolution (MODE) optimization method. Keywords: communication; convergence; crde; doi:10.1016; fitness; function; grid; mode; modulation; objective; optimization; parameters; power; radio; system; transmission
• IMPORTANCE OF A TYPE OF GATING SYSTEM IN INVESTMENT CASTING TECHNOLOGY by Vrátný, Ondřej; Herman, Aleš (2019) - Use of ProCAST software to model casting systems for the centrifugal casting of GTE blades made of intermetallic alloys by V.V. Smirnov and colleagues focuses on the issue of the design of ceramic moulds for castings made of intermetallic titanium alloys (TiAl) casted by the investment casting technology. In particular, the following authors also deal with simulations in the Investment casting technology: Pei-Hsing Huang and Chi-Ju Lin are authors of Computer-aided modeling and experimental verifica- tion of optimal gating system design for investment casting of precision rotor. Keywords: casting; design; figure; filling; gating; investment; system; technology; variant
• Biological Systems Thinking for Control Engineering Design by Murray-Smith, D. J. (2004) - 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: control; control system; design; feedback; fibres; muscle; muscle spindle; properties; signal; spindle; system
• INDICATORS FOR COMMON CROSSING STRUCTURAL HEALTH MONITORING WITH TRACK-SIDE INERTIAL MEASUREMENTS by Sysyn, Mykola; Gerber, Ulf; Nabochenko, Olga; Li, Yangyang; Kovalchuk, Vitalii (2019) - 2/2019 Indicators for common crossing monitoring [30] G. Lederman, S. Chen, J. Garrett, et al. Point colours correspond to common crossing lifetime in passed megatons of trains. Keywords: acceleration; analysis; crossing; features; figure; impact; lifetime; monitoring; principal; railway; regression; spectral; system; track
• Control of Systems of Reservoirs with the Use of Risk Analysis by Fošumpaur, P.; Satrapa, L. (2004) - 4 Conclusions We studied the use of risk analysis to quantify a suitable set of criteria for multi-objective optimisation of reservoirs and reservoir systems, which are usually intended to satisfy 54 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 44 No. AP04_2web.vp 1 Introduction In the field of controlling of reservoirs systems, it is often very difficult to formulate a reliable system of criteria. Keywords: analysis; control; criteria; reservoirs; risk; system; water
• A coding and On-Line Transmitting System by Zagursky, V.; Zarumba, I.; Riekstinsh, A. (2004) - In [1], an increasing number of channels lead to a proportional increase of acquisition time. The transmitter (see Fig. 1) has 64 identical voltage to time interval converters. Keywords: channels; fig; interval; system; time; transmission
• Image Analysis of Eccentric Photorefraction by Dušek, J.; Dostálek, M. (2004) - 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; convergence; image; lens; light; system
• EIGENVALUES EVALUATION OF GENERALLY DAMPED ELASTIC DISC BRAKE MODEL LOADED WITH NON-CONSERVATIVE FRICTION FORCE by Úradníček, Juraj; Musil, Miloš; Bachratý, Michal (2020) - 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 Keywords: brake; damped; damping; figure; friction; non; system
• PERFORMANCE ANALYSIS OF QUADRATURE CHAOS SHIFT by Alabbasi, Hesham Adnan; Abboud, Izz Kadhum; Hasan, Fadhil Sahib (2020) - The data rate and energy saving improvement factor in a percent form is derived and compared with the QCSK and DCSK systems. Evaluating the data-rate and energy saving im- provement, compared to conventional QCSK and DCSK systems. Keywords: ber; channel; chaos; dcsk; information; keying; performance; qcsk; reference; shift; signal; system
• Computer Aided Design of Transformer Station Grounding System Using CDEGS Software by Nikolovski, S.; Barić, T. (2004) - 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. I V I T Y (SYSTEM INFORMATION SUMMARY) System of Units: Meters Soil Type Selected: Multi-Layer Horizontal RMS error between measured and calculated: 2.08052 % resistivities Soil layer resistivity calculated by RESAP is the initial data for a further study. Keywords: fig; grounding; resistivity; soil; system; touch; transformer; � �
• PNEUMATIC SYSTEMS FOR AUTOMATIC SORTING EQUIPMENT by Onderová, Iveta; Čačko, Viliam; Kolláth, Ľudovít; Šooš, Ľubomír; Smelík, Andrej; Varga, Alexander (2019) - Automatic system for laser cutting machines The aim of the project was to create a modular auto- matic handling system for the productive operation of MSF laser cutting machines. [1–3] In addition to the development of the control sys- tem for the individual modules of these nodes, the development of an information system for the produc- tion management of such a node or group of nodes creating automatic cutting workplaces was carried out. Keywords: cutting; deflection; laser; material; parts; position; sorting; suction; system
• Recycling and Networking by Bányai, T. (2004) - 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: collection; collection system; disassembly; environmental; logistic; operation; products; recycling; system; users; waste
• Programming a Logical Control Method by a Parallel Process by Jiroušek, P. (2004) - 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: control; language; primas; processes; program; system
• STRATEGIC MODULATION OF THERMAL TO ELECTRICAL ENERGY RATIO PRODUCED FROM PV/T MODULE by Aminou Moussavou, Anges A.; Raji, Atanda K.; Adonis, Marco (2021) - Analysis of solar PV cell performance with changing irradiance and temperature. Radiation heat transfer versus Rse. 319 A. A. Aminou Moussavou, A. K. Raji, M. Adonis Acta Polytechnica Figure 10. PV cell temperature versus Rse. Keywords: cell; energy; figure; heat; module; photovoltaic; power; pv cell; resistance; rse; solar; system; temperature; thermal
• Preliminary prospects of a Carnot-battery based on a supercritical CO2 Brayton cycle by Rindt, Karin; Hrdlička, František; Novotný, Václav (2021) - 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: co2; cold; cycle; discharging; efficiency; energy; figure; heat; power; storage; system; temperature; trip
• Implementation of Sliding Mode Observer Based Reconfiguration in an Autonomous Underwater Vehicle by Mitchell, A. J.; McGookin, E. W.; Murray-Smith, D. J. (2005) - � �� � ( ) ( ) ( ) (� � � � � � � � � � � � �� � � � � � � � 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: auv; control; fig; heading; reconfiguration; sensor; system; � c; � �
• Intelligent Data Storage and Retrieval for Design Optimisation – an Overview by Peebles, C.; Bil, C.; Drack, L. (2005) - 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: acm; algorithms; applications; compression; computer; czech; data; database; design; engineering; knowledge; methods; models; object; optimisation; query; search; space; system; technical; university; usa; use; vol
• High-Speed Real-Time Simulators for Engineering Design by Crosbie, R. E.; Hingorani, N. G. (2005) - 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: design; frame; hsrt; power; processors; simulation; system; time
• Sliding Mode Implementation of an Attitude Command Flight Control System for a Helicopter in Hover by McGeoch, D. J.; McGookin, E. W.; Houston, S. S. (2005) - The switching term drives the systems when subjected to dis- turbance or commands, defined by the sliding surface, �, which is represented as [16, 17] �( ) ( )� �� � � � � � �x h x h x xT T cmd , ( This defines a state space system given by: x Ax Bu� � (1) � �x T� u v w p q r � � � , (2) � �u T� � � � �� 1 1 0s c tr , (3) where, A is the system derivative matrix, B is the control deriv- ative matrix, u (surge), v (sway) and w (heave) are the veloci- ties in the body referenced x, y, and z axes respectively, with the rotational velocities p (roll rate), q (pitch rate), and r (yaw rate), and attitudes � (roll), � (pitch) and � (yaw) about those axes. Keywords: attitude; control; controller; dynamics; fig; pitch; response; roll; system; yaw; � �
• Active disturbance rejection control-based anti-coupling method for conical magnetic bearings by Nguyen, Danh Huy; Vu, Minh Le; Trong , Hieu Do; Nguyen, Danh Giang; Nguyen, Tung Lam (2022) - Conical magnetic bearings with radial and thrust control. Fuzzy modeling and control for conical magnetic bearings using linear matrix inequality. Keywords: bearing; conical; control; current; position; rotor; system
• Generalized three-body harmonic oscillator system: ground state by Escobar-Ruiz, Adrian M.; Montoya, Fidel (2022) - In the case of equal masses m1 = m2 = m3 the co- ordinate I is proportional to the hyperspherical radius (hyperradious). In a previous work [4], the most general quantum system of a three-body chain of harmonic oscillators, in Rd, was explored exhaustively. Keywords: body; harmonic; operator; oscillator; state; system
• Modified Korteweg-de Vries equation as a system with benign ghosts by Smilga, Andrei (2022) - − 2u3uxx − 2u6 ] (12) For the time-independent Ansatz, we obtain, instead of (7), ∂x(uxx + 2u3) Suppressing the nonlinear term in the KdV or MKdV equations, we obtain uxxx + ut = 0 . Keywords: equation; ghosts; mkdv; problem; system; u(t
• Outdoor performance investigation of a thermoelectric cooler-integrated solar air heating collector by Segnon, Josué R.; Njoku, Howard O. (2024) - [26] modelled the air cooling and water produc- tion using TE heat pumping and reported that by increasing the input power to the TE modules, the total cooling load increased but the system efficiency decreased significantly. Although TE heat pumping has been shown to im- prove the performance of heating/cooling systems, the existing literature for solar-TE cooling has focused on improving the electrical performance of PV modules, and no work, to date, extensively studied TE heat extraction from SAH’s absorber plate. Keywords: absorber; air; collector; energy; figure; heat; plate; pumping; sah; solar; system; thermal
• Development of a Robot System for Advanced High Quality Manufacturing Processes by Kuhlenkoetter, B. (2006) - 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 The developments presented below aim at raising the tol- erances of handling systems to changing conditions, and also their flexibility toward frequently changing workpieces in or- der to increase the reliability of the machines in the end and to expand the use of solutions involving industrial robots. Keywords: fig; grinding; polishing; process; robot; system
• Neural network based patient recovery estimation of a PAM-based rehabilitation robot by Dinh, Van-Vuong; Trinh, Minh-Chien; Bui, Tien-Dat; Duong, Minh-Duc; Dao, Quy-Thinh (2023) - Estimating the total torque applied to robot joints (MNN ) Then, the torques generated by PAMs that affect robot joints are collected as output data. Keywords: control; estimation; figure; force; gait; impedance; joint; network; patient; recovery; rehabilitation; robot; system; torque; training
• Power System Stabilizer Driven by an Adaptive Fuzzy Set for Better Dynamic Performance by Soliman, H. F.; Attia, A.-F.; Hellal, M.; Badr, M. A. L. (2006) - e M m q1 2 (1) � �� � �� � �b (2) �� � � � � � � � � � � � � e E K T e T Kq FD do q do 4 3 � (3) � � � � � � � � � � � � � � � � � � � E Speed deviation (��) Speed deviation chang (� �� ) NL NM NS Z PS PM PL NL U_NL U_NL U_NL U_NL U_NM U_PS U_Z NM U_NL U_NM U_NM U_NM U_NS U_Z U_PS NS U_NL U_NM U_NS U_NS U_Z U_PS U_PM Z U_NL U_NM U_NS U_Z U_PS U_PM U_PL PS U_NM U_NS U_Z U_PS U_PS U_PM Keywords: fig; output; power; set; system; � �
• Genetic Algorithm Based Control System Design of a Self-Excited Induction Generator by Attia, A.-F.; Soliman, H.; Sabry, M. (2006) - i x i i� � � �� ( ), (11) where: �qr is the rotor flux linkage at quadrant axis. The chance on the roulette-wheel is adaptive and is given as P P� �� as in the Eq. Keywords: controller; czech; fig; gains; power; stator; system; technical; university; � �
• A practical way to apply a technique that accelerates time history analysis of structures under digitised excitations by Soroushian, Aram (2024) - Nevertheless, this is consistent with the na- ture of time integration analyses, which may require very small integration steps to achieve sufficient ac- curacy in non-linear complicated analyses; see [1, 86– 90, 96, 97, 107, 108, 119, 120]. The weakness is consistent with the characteristics of time integration analysis of highly oscillatory highly non-linear systems. Keywords: accuracy; analysis; analysis run; application; behaviour; computation; engineering; equation; example; excitation; figure; history; linear; methods; non; procedure; response; run; seb; seb thaat; step; system; table; target; thaat; time; time integration
• Extra control coefficient additive ECCA-PID for control optimization of electrical and mechanic system by Can, Erol (2022) - 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: control; controller; ecca; pid; response; system; values
• Multidimensional mobile mapping and integrated approach for the digitalisation of underground transport infrastructure by Foria, Federico; Calicchio, Mario; Moretti, Laura; Loprencipe, Giuseppe (2023) - Keywords: MIRET, ARCHITA, mobile mapping, tunnel defects, railway tunnels. Analysis of predictive maintenance for tunnel systems. Keywords: approach; data; defects; figure; images; infrastructure; inspection; lining; maintenance; management; mapping; mobile; railway; sector; survey; system; tunnel
• The effect of ambient temperature on the delay time of perimeter protection by Ďurica, Jakub; Sovjak, Radoslav; Boroš, Martin; Kuffa, Radoslav (2023) - The six basic groups of perimeter security barriers are: • classic wire fencing, • security fencing, • high security fencing, • top barriers, • anti-scaling barriers, • entrances, driveways, and other units [26]. This type of test was chosen because perimeter security barriers are exposed to different thermal influences from the environment, either low minus temperatures or high plus temper- atures and the technical standard does not take this 322 vol. Keywords: barriers; delay; perimeter; protection; security; system; temperature; test; time
• From positional representation of numbers to positional representation of vectors by Farkas, Izabella Ingrid; Pelantová, Edita; Svobodová, Milena (2023) - If addition in a matrix numeration system (M, D) with base M ∈ Zm×m and a finite digit set D ⊂ The numeration system is given by a square matrix base M ∈ Zm×m and by a finite set of digits D ⊂ Zm. Keywords: addition; digit; matrix; number; parallel; set; system
• Embedded Operating System for MicroBlaze by Šimek, M. (2006) - 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. Keywords: Embedded systems, operating systems, configurable HW, MicroBlaze. Fig. Keywords: boot; file; kernel; microblaze; system; uclinux
• Fractional multi-loop active disturbance rejection control for a lower knee exoskeleton system by Al-Awad, Nasir Ahmed; Humaidi, Amjad Jaleel; Al-Araji, Ahmed Sabah (2023) - The definition of fractional calculus proposed by Caputo is widely used in fractional order control The general idea of FADRC1 for Exoskele- ton control system. to comprehensively estimate the un-modelled errors and external disturbances. Keywords: adrc; control; controller; disturbance; exoskeleton; fadrc3; figure; fractional; journal; knee; observer; order; performance; rehabilitation; rejection; system
• Quality Control in Automated Manufacturing Processes – Combined Features for Image Processing by Kuhlenkötter, B.; Zhang, X.; Krewet, C. (2006) - A large range of methods is introduced to present defect images. The challenge in our project now is to characterise and determine the type of defects from predefined categories and additional foulings (which are called pseudo-defects in our project) on the surface. Keywords: classification; defects; features; fig; image; ratio; software; system
• Intelligent Support for a Computer Aided Design Optimisation Cycle by Dolšak, B.; Novak, M.; Kaljun, J. (2006) - 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: analysis; computer; defects; design; knowledge; mesh; optimisation; process; system; user
• Enhancement of power transfer capacity of transmission network using multilevel multifunction inverter by Nathgosavi, Kiran; Joshi, Prasad (2023) - https://doi.org/10.1109/TPEL.2008.2008441 [7] P. Rao, M. L. Crow, Z. Yang. STATCOM control for power system voltage control applications. Despite the variety of power controls that have been extensively studied, it has been found that the reactive power controller of a normal two-level inverter has a limit on the utilisation of the solar array during the night. Keywords: capacity; controller; current; figure; grid; ieee; inverter; mlmfi; multilevel; output; power; system; transfer; transmission; voltage
• The importance of using active thermal protection following restoration work on old buildings by Šťastný, Patrik; Antošová, Naďa; Kalús, Daniel; Mučková, Veronika (2024) - [27] V. Mučková, D. Kalús, D. Koudelková, et al. Contribution to active thermal protection research – Part 1: Analysis of energy functions by parametric study. Energies 16(11):4391, 2023. https://doi.org/10.3390/en16114391 [28] D. Kalús, V. Mučková, D. Koudelková, et al. Contribution to active thermal protection research – Part 2: Verification by experimental measurement. Keywords: atp; buildings; energy; heat; insulation; moisture; protection; research; structure; system; technologies; technology; temperature; thermal
• P-LDPC coded image transmission with OFDM over underwater acoustic channel by Al-Kadhimi, Aymen M.; Abdelkareem, Ammar E.; Tsimenidis, Charalampos C. (2024) - In [8], LDPC codes for non-binary sources were investigated for underwater multicarrier commu- nications. In consequence of those challenges, the quality of data transmission is affected in terms of reduced data rate to cope with complication in underwater channels and frequent increased data packet loss. Keywords: block; channel; codes; coding; figure; image; ldpc; length; performance; system; transmission; underwater
• Simulation of an active cooling system for low-concentratinag photovoltaic solar cells by Orynbassar, Sayat; Kapparova, Ainur; Dosymbetova, Gulbakhar; Almen, Dinara; Yershov, Evan; Saymbetov, Ahmet; Nurgaliyev, Madiyar; Zholamanov, Batyrbek (2025) - [41] K. A. A. Amer, M. A. Irhouma, M. I. Hamdan, et al. Economic-Environmental-Energetic (3E) analysis of photovoltaic solar energy systems: Case study of mechanical & renewable energy engineering departments at Wadi AlShatti University. With an active cooling system, we can get a more uni- form distribution of solar cell temperature than with passive cooling [28]. Keywords: cell; cooling; energy; figure; photovoltaic; radiator; surface; system; temperature; tubes; water
• Developing E-learning Courses for Mobile Devices by Szabados, R.; Sipos, K. (2007) - Due to the large number of different video codecs, there are numerous ways for video adaptation. � Video: Probably the most important problem is adequate adaptation of video files to the given platform. Keywords: adaptation; course; file; learning; package; program; scorm; system; video
• Prague postal time service: clock and sirens – improbable connection by Hrtus, Martin Dominik (2024) - Keywords: History of technology, Prague Postal Time Service, Czechoslovakia, 1930s, synchronised clocks, anti-aircraft sirens, civil defence, František Rieger, Prague. Licensed under a CC-BY 4.0 licence Published by the Czech Technical University in Prague PRAGUE POSTAL TIME SERVICE: Keywords: air; box; clock; construction; czech; czechoslovakia; file; františek; postal; ppts; prague; public; rieger; service; sirens; state; system; technical; time; time service
• Tunisian engineers: protagonists of Tunisia’s modernisation. Two key moments: 1956 and 1987 by Mansouri, Amani; Rodríguez Ortiz, Jorge Alonso (2024) - [7], in which she defines the condi- tions for the emergence of Tunisian engineers as a very recent phenomenon and establishes their fundamen- tal participation in modernisation. However, it is necessary to know and analyse the evolution of the social and formative origin of Tunisian engineers, articulated to the various dynam- ics of political power and the contingent evolution of life. Keywords: development; education; engineering; engineers; french; independence; knowledge; modernisation; national; power; process; science; state; system; technology; tunisia
• The decimalisation of Republican time. The French Revolution which failed (1793–1795) by Dudzik, Michael (2024) - In order to establish a new social order, the revolutionaries proposed, among other things, the use of decimal time which was part of the so-called Republican calendar. While decimal time was an important addition to the Republican calendar, few authors have emphasised it, let alone produced works of merit on the issue. Keywords: calendar; day; days; decimal; decimalisation; des; french; hours; months; new; people; republican; revolution; system; time; use; year
• Performance improvement of manipulator actuated by pneumatic artificial muscles based on synergetic control and social spider optimisation algorithm by Hasan, Alaq F.; Raheem, Hadeer A.; Hussein, Rajaa (2025) - Conclusion In this work, a synergetic algorithm control theory and a sliding mode control method are developed for tracking PAM system control. Synergetic control design based sparrow search optimization for tracking control of driven-pendulum system. Keywords: algorithm; control; controller; equation; pam; parameters; performance; pneumatic; sact; system
• Wireless and Non-contact ECG Measurement System – the “Aachen SmartChair” by Aleksandrowicz, A.; Leonhardt, S. (2007) - Traditionally, for ECG measurement conductive elec- trodes have been applied which are directly attached to the skin. [4] introduced a so-called “driven-ground- -plane” circuit for non-contacting ECG measurements which was also implemented in the application presented here. Keywords: body; ecg; electrodes; fig; measurement; signal; system
• Inductive Contactless Distance Measurement Intended for a Gastric Electrical Implant by Tomek, J. (2007) - Magnetic measurements are unfortunately directionally dependent, so only the use of multi-axial probes and trans- mitters can ensure precise position evaluation. 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. Keywords: distance; fig; induction; system; � �
• Energy management for electric vehicles with battery and supercapacitor by Bhagat, Abhishek Shankar; Kalkhambkar, Vaiju; Prasanta Gupta, Pranda; Prakash, Vivek (2025) - Keywords: Hybrid energy storage system, energy management system, supercapacitor, regenerative braking, electric vehicle. For heat dissipation, energy management systems requires auxiliary electrical power, which is drawn from HESS, and therefore impacts the vehicle range. Keywords: battery; braking; braking energy; control; current; cycle; demand; drive; driving; electric; energy; energy management; energy storage; figure; hess; hybrid; mode; power; soc; storage system; strategy; supercapacitor; system; vehicle; voltage
• Multi-mode secure data communication for real-time robot arm control with Li-Fi technology by Msallam, Mohammed Majid; Samet, Refik (2025) - [19] used AES for data encryption in their Li-Fi system, using the Elliptic Curve Diffie-Hellman (ECDH) key exchange protocol for secure key generation. In used encryption modes, the received data is decrypted before instructing the robotic arm to perform the designated action. Keywords: arc4; arm; communication; data; encryption; figure; mode; movement; rc4; receiver; system; technology; transmission; transmitter
• The Impact of Connecting Distributed Generation to the Distribution System by Mgaya, E. V.; Müller, Z. (2007) - 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: distribution; generators; power; system; voltage; wind

• Comparison between the Wilhelmy surface tension measurement method and the pendant drop shape analysis method by Cavalcante de Farias, Estela Cristina; Kropf Santos Fermam, Ricardo; de Mendonça, Amsterdam de J. Souza Marques (2025) - This comparison involved surface tension measurements of these liquids: bidistilled water, n-dodecane, and per- fluorocarbon (FC-40), these liquids were chosen to cover a wide range of surface tension with stability Surface tension measurement by the pendant drop shape analysis method The calibration data include the regression for obtain- ing the surface tension in mN m−1 in the temperature range from 18 °C to 30 °C and the surface tension mea- surement range was from 16 mN m−1 to 73 mN m−1 with an expanded uncertainty of 0.28 mN m−1 and a coverage factor k = 2.00, according to: γc = C0 + C1 · TL + C2 · γi, (3) where γc is the corrected surface tension, in mN m−1; γi is the indicated surface tension, in mN m−1; C0, C1 and C2 are the parameters of the regression equation, and TL is the measurement temperature, in °C. Keywords: analysis; drop; liquid; measurement; method; shape; surface tension; temperature; wilhelmy
• CO2 capture in pilot-scale unit using solid adsorbent in biomass fluidised bed boiler flue gas by Dvořák, Michael; Hrdlička, Jan; Pilař, Lukáš; Skopec, Pavel; Burda, Jiří (2025) - Modification and functionalization of zeolites to improve the efficiency of CO2 adsorption: A review. Over the years, considerable efforts have been devoted to developing solid sorbents, but much less to the development of adsorption units, especially continu- 501 https://doi.org/10.14311/AP.2024.64.0501 https://creativecommons.org/licenses/by/4.0/ https://www.cvut.cz/en M. Dvořák, J. Hrdlička, L. Pilař et al. Keywords: adsorption; capture; co2; experimental; figure; flue; gas; pressure; sorbent; temperature; unit; vpsa; zeolite
• Mathematical modelling and analysis of three-dimensional Maxwell-Nanofluid flow over a bidirectional stretching surface in the presence of a magnetic field by Poornakantha, Tanuku; Prasanna, Mamidi Lakshmi; Gundagani, Murali (2025) - Introduction It is critical to include radiative heat flow while study- ing heat transfer processes, especially in regard to nanofluids. Zhang and Zheng published a novel theory for non-linear radiation heat transfer in nanofluids [18]. Keywords: figure; flow; fluid; heat; nanofluid; number; parameter; temperature; transfer; values
• Conceptual design of a space nuclear fast reactor by Sabol, Josef; Frýbort, Jan (2025) - It consists of fuel rods, which are axially divided into these parts: the lower reflector part, the fuel part, the gas plenum for fission product accumulation, and the upper reflector part. Nuclear Electric Propulsion (NEP) uses thermal energy generated by the fission of nuclear fuel. Keywords: coolant; fuel; haleu; heu; nuclear; power; reactor; rods; space; temperature
• Comparison of Temperature Loadings of Bridge Girders by Římal, J.; Šindler, D. (2008) - 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 min� � � � � � �0 1: Tmax � �37 °C � � �Te, max 45 °C Tmin � �24 °C � � �Te, min 24 °C Using reference temperature T0 10� °C (the temperature when the bridge girder was placed on the bearings) the uni- form temperature components are as follows: T T TN pos e, , max� � � � � � �0 45 10 35 °C T T TN neg e, , min� � � � � � �0 20 10 30 °C Components with temperature differences: Because a composite bridge girder is not a simple struc- ture with acceptable details, it is necessary to apply a non- linear temperature gradient. Keywords: bridge; temperature; � �
• Thermal Conductivity of Gypsum at High Temperatures – A Combined Experimental and Numerical Approach by Rahmanian, I.; Wang, Y. (2009) - For a boundary node, when subjected to convective and radiative boundary conditions (Fig. 2): � � � � � � �� � � �� � � � � � � � � � �T F T h x k T F h x k T1 0 2 1 0 1 12 1 2 1 � � � � �E T T t c x � � ( ) ( ) ,� � �273 273 24 1 4 � � (6) where F0 is F k t c x 0 1 2� � �� ( ) , h(T) is convection heat transfer coefficient (W/m2 °C), T� is the ambient temperature (°C), � is a geometric “view factor”, E is the effective emissivity, � is Stefan-Boltzmann constant (5.67×10 8 W/m2 K4). ( )d free (J/kg °C), (8) where � c is the average additional specific heat, ed is the dehydration water content (percentage by total weight), efree is the free water content (percentage by total weight), �T is the temperature interval, f1, f2 are correction factors to account for the heat of reactions and effects of water movement. Keywords: conductivity; gypsum; temperature; � �
• Experimental Analysis of Concrete Strength at High Temperatures and after Cooling by Klingsch, E.; Frangi, A.; Fontana, M. (2009) - [6] EN 12390-2:2008; Testing hardened concrete – Part 2: Making and curing specimens for strength tests. This ef- fect increases with increasing maximum temperature and lower cooling temperatures, respectively. Keywords: cement; concrete; strength; temperature
• Simulation and Study of Natural Fire in a Wide-Framed Multipurpose Hall with Steel Roof Trusses by Pada, D. (2009) - 3 presents the RHR curve for the spectator stand design fire. 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: design; fire; roof; stand; temperature
• Connection Temperatures during the Mokrsko Fire Test by Chlouba, J.; Wald, F. (2009) - Keywords: Fire test, FE simulation, fire safe connection, temperature prediction, Angelina beam, compartment fire. [3] Kallerová, P., Wald, F.: Ostrava fire test, Czech Technical University in Prague, CIDEAS report No. 3-2-2-4/2, p. 18, www.cideas.cz. Keywords: beam; connection; fig; fire; temperature
• Connections of Trapezoidal Sheets under Fire by Kallerová, P.; Wald, F.; Sokol, Z. (2009) - In test set C, trapezoidal sheets with measured thickness 0.75 mm, width 75 mm and length 500 mm were tested. The temperatures of the connection were measured by a thermocouple attached to the steel sheet close 82 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 49 No. 1/2009 Connections of Trapezoidal Sheets under Fire P. Kallerová, F. Wald, Z. Sokol This paper describes two different experiments on connections of trapezoidal sheets under elevated temperatures. Keywords: fig; fire; sheet; temperature
• Working Fluid Quantity Effect on Magnetic Field Control of Heat Pipes by Cingroš, F.; Hron, T. (2009) - Keywords: Heat pipes, magnetic field, variable conductance, oxygen, cryogenic. Fig. Heat pipes are commonly used for cooling and heat transport in electronic devices, techno- logical processes and in many other types of equipment. Keywords: field; fluid; heat; mpa; pipe; temperature
• Differences Between Doped and Undoped Zirconium Alloy Oxide Layers by Frank, H. (2010) - At lower temperatures, the samples had normal I-V characteristics of the form of eq. 1 with space-charge limited currents, which tended to become linear at higher temperatures. 7: Equal temperature dependence of mobility in both samples Fig. 8: Equal temperature dependence of carrier concentra- tion in both samples energy. Keywords: fig; samples; temperature
• Measurement of Heat Transfer Coefficients in an Agitated Vessel with Tube Baffles by Dostál, M.; Petera, K.; Rieger, F. (2010) - Keywords: heat transfer coefficients, agitated vessels, tube baffles. Dimensionless parameters are usually used to de- scribe the relation between heat transfer coefficients and other parameters, e.g. mixing intensity. Keywords: baffles; cooling; heat; heat transfer; heating; liquid; number; temperature; transfer; tube
• Nonlinear Aspects of Heat Pump Utilization by Najman, R. (2010) - Keywords: heat pumps, thermal mass of an object, coefficient of performance. These installations have a profound impact on the performance of heat pumps. Keywords: heat; pump; temperature; water
• Thermal Forming of Glass — Experiment vs. Simulation by Švéda, L.; Landováa, M.; Míka, M.; Pína, L.; Havlíková, R.; Maršíková, V. (2011) - [3] Chen, Y.: Thermal forming process for precision freeform optical mirrors and micro glass optics, PhD thesis, The Ohio State University, 2010. Independent temperature measurements in- side the furnace for greater precision will be per- formed. Keywords: data; forming; glass; process; temperature
• Plasma Flow and Temperature in a Gliding Reactor with Different Electrode Configurations by Sláma, J. (2012) - 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: configuration; divergent; flow; plasma; temperature
• Modeling of Concrete Creep Based on Microprestress-solidification Theory by Havlásek, P.; Jirásek, M. (2012) - In this paper, values of parameters used by the microprestress-solidification theory (MPS) are recommended and their influence on the creep compliance function is evaluated and checked against experimental data from the literature. 3 Numerical simulations In this section, experimental data are compared to results obtained with MPS theory, which reduces to the standard B3 model in the special case of basic creep. Keywords: concrete; creep; data; loading; temperature
• A Thermogravimetric Study of the Behaviour of Biomass Blends During Combustion by Jiříček, Ivo; Rudasová, Pavla; Žemlová, Tereza (2012) - [2] Van Loo, S., Koppejan, J.: 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: biomass; combustion; heat; ignition; straw; temperature
• Biomass Gasification — Primary Methods for Eliminating Tar by Lisý, Martin; Baláš, Marek; Moskalík, Jiří; Štelcl, Otakar (2012) - 6 Initial experimental conditions The basic parameters that had to be set included dolomite particle size, based on the volume and the velocity of the moving gas, and also the mass of the fluidized bed in the reactor in the course of its oper- ation. 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. Keywords: bed; biomass; dolomite; gas; gasification; reactor; tar; temperature
• Energy Recovery from Contaminated Biomass by Moskalík, Jiří; Škvařil, Jan; Štelcl, Otakar; Baláš, Marek; Lisý, Martin (2012) - References [1] Baláš, M., Lisý, M.: Water-steam influence on biomass gasification process, Acta Metallurgica Slovaca, 11, 1, 2005, 14–21, (in Czech). For the experiments, chipboard waste was chosen as a representative sample of contaminated biomass. Keywords: biomass; chipboard; energy; fuel; gasification; temperature; wastes
• The Effect of Temperature on the Gasification Process by Baláš, Marek; Lisý, Martin; Štelcl, Ota (2012) - Reactor parameters: • Capacity (in produced gas) 100 kWt • Fuel demand (consumption, requirement) 150 kWt • Wood consumption 40 kg · h−1 • Air flow rate 50 m3 n · 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: dependency; figure; gas; gasification; temperature
• A Way to Use Waste Heat to Generate Thermoelectric Power by Brázdil, Marian; Pospíšil, Jiří (2012) - Only materials which possess ZT > 0.5 are re- garded as thermoelectric materials [3]. Thermoelectric generators (TEG) have the poten- tial to recover waste heat as effective energy and to make a major contribution to reducing fossil fuel con- sumption. Keywords: energy; figure; heat; materials; temperature
• A Pulverized Coal-Fired Boiler Optimized for Oxyfuel Combustion Technology by Dlouhý, Tomáš; Dupal, Tomáš; Dlouhý, Jan (2012) - 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). The reason for this is the radical effect of false air suction on increasing the amount of flue gas and on lowering the CO2 concentration. Keywords: air; boiler; combustion; flue; flue gas; gas; oxygen; temperature
• Diamond Films for Implantable Electrodes by Henychová, Petra; Hiřmanová, Klára; Vraný, Martin (2012) - 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: boron; diamond; growth; temperature
• Temperature and Moisture Dependence of the Specific Heat of High Performance Concrete by Toman, J.; Černý, R. (2001) - [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 mcw s N sc� � � � � , (2) mcw is the mass of the calorimeter with water before the measurement, ms is the mass of the system calorimeter-wa- ter-sample after measurement, �mN is the mass of the water naturally evaporated during the measurement (this heat loss is already included in the heat loss calibration curve), �msc is the change of mass due to the chemical reaction of the sample with water (e.g., hydrolysis). (3) However, from the physical point of view, it is more correct to determine the value of the specific heat “pointwise”, in accordance with the definition of specific heat, � � Keywords: heat; temperature; water; � �
• Atmospheric Argon Free burning Arcs with a Simplified Unified Model Using CFD-Arc Modeling by Lee, Won-Ho; Lee, Jong-Chul (2013) - The present results for 200A, com- pared with those of [3, 11] given in brackets, were maximum arc temperature 24 300K (23 700K), max- imum axial velocity 500m/s (500m/s) and arc volt- age 10.5V (12.9V). Free burning arcs, where the work piece acts as an anode, are frequently used for a number of applications. Keywords: anode; arc; arcs; burning; plasma; temperature
• Materials for Fusion Applications by Matějíček, Jiří (2013) - Design requirements for plasma facing materials in ITER. Interactions with Hydrogen Isotopes The interaction of fusion materials with hydrogen iso- topes is important from the point of view of the effects on materials properties and behavior, as well as for the fuel balance. Keywords: components; conductivity; demo; energy; et al; facing; fusion; heat; hydrogen; irradiation; iter; materials; neutron; nucl; plasma; properties; reactor; surface; temperature; tritium; tungsten; wall
• AUTOMATIC BIOMASS BOILER WITH AN EXTERNAL THERMOELECTRIC GENERATOR by Brázdil, Marian; Šnajdárek, Ladislav; Kracík, Petr; Pospíšil, Jirí (2014) - In the near future, thermoelectric generators could completely eliminate the dependence an automated domestic boiler system on the power supply from the electricity grid, and could ensure comfortable operation in the event of an unexpected power grid failure. Keywords: Thermoelectric generator, thermoelectricity, waste heat, biomass boiler. Keywords: gas; heat; modules; power; temperature
• LABORATORY EQUIPMENT FOR AUTOTHERMAL REFORMING OF ORGANIC MATTER IN SUPERCRITICAL WATER by Gajdoš, Matúš (2014) - Suitable input materials are mainly industrial waste or biomass with high water content. Fluid water in this state is called supercritical water (SCW), and values of its physical properties are included among the values of such properties for liquid phase and gaseous phase. Keywords: pressure; reactor; temperature; water
• ANNEALING OF POLYCRYSTALLINE THIN FILM SILICON SOLAR CELLS IN WATER VAPOUR AT SUB-ATMOSPHERIC PRESSURES by Pikna, Peter; Píč, Vlastimil; Benda, Vítězslav; Fejfar, Antonín (2014) - Keywords: passivation, water vapour, thin film solar cell, polycrystalline silicon (poly-Si), multicrys- talline silicon (m-Si), Suns-VOC . Sufficient photovoltaic efficiency of thin film solar cells in connection with a sufficiently low production price is the key condition for compet- itiveness on the market dominated by wafer-based solar cells. Keywords: cell; detector; light; lock; method; solar; suns; temperature; voc; voltage
• EFFECTIVE USE OF ROTARY FURNACE SHELL HEAT by Lisuch, Julius; Dorcak, Dusan; Spisak, Jan (2014) - By the intensity of the con- trolled shell cooling we can affect the flow of useful heat in the RP segment and thus control the intensity Detained heat [MJ] [%] 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 [MJ] [%] 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: rotary furnace, furnace, magnesite, control shell cooling, shell. Keywords: figure; furnace; heat; losses; rotary; shell; surface; temperature
• A Mathematical Model of theDrying Process by Haghi, A. K. (2001) - (2) The boundary conditions for convective heat transfer and mass transfer at the leather surface are � �q h T T� �e e (3) and � �m h C C� �m e A . 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. Keywords: content; drying; leather; moisture; temperature; � �
• SIMULATION OF HEAT TRANSPORT AT THE COOLING OF THE SUGAR SOLUTION IN A RECUPERATION EXCHANGER by Brestovič, Tomáš; Čarnogurská, Mária; Příhoda, Miroslav; Kubík, Michal (2015) - (11) where αstr is the average value of the transfer coeffi- cient at the surrounding temperature of 8 °C and in the interval of the tank surface temperatures of 0 to 22 °C (Wm−2 K−1); S is the external heat exchanging surface of the tank (m2); tok is the environment tem- perature (°C); t – stum temperature in time τ (°C); n – number of cooling panels (1); Pch – device cooling performance (W); m – cooled material weight (kg); 143 T. Brestovič, M. Čarnogurská, M. Přihoda, M. Kubík Acta Polytechnica Figure 7. Course of the stum temperature, depending on time. Conclusion The methodology for determining cooling parameters using a combination of a numeric and an analytical calculation enables us to describe the dynamic be- haviour of the cooling system precisely. Keywords: cooling; heat; performance; stum; temperature
• EFFECT OF THE ADDITION OF LI ON THE STRUCTURE AND MECHANICAL PROPERTIES OF HYPOEUTECTIC Al-Mg2Si ALLOYS by Prach, Olena; Horník, Jakub; Mykhalenkov, Kostiantyn (2015) - Alloys with various contents of Li were studied by means of differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and energy dispersive X-Ray microanalysis (EDX). [6], it is clear that the addition of Li to Al-Cu or Al-Mg alloys can substantially enhance the mechanical properties, while at the same time decreasing the density. Keywords: addition; alloys; effect; eutectic; mg2si; properties; temperature
• OPERATING SPECIFICATIONS OF CATALYTIC CLEANING OF GAS FROM BIOMASS GASIFICATION by Lisý, Martin; Baláš, Marek; Špiláček, Michal; Skála, Zdeněk (2015) - 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 35mg/m3 n. The results of the measurements conducted in laboratories helped us design a pilot technology for catalytic gas cleaning. The fundamental classification dis- tinguishes between primary and secondary measures for tar elimination. Keywords: biomass; catalyst; cleaning; dolomite; elimination; gas; gasification; pressure; tar; temperature
• Thermal Comfort and Optimum Humidity Part 1 by Jokl, M. V. (2002) - 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: air; body; clothing; cold; comfort; environment; fig; heat; human; humidity; operative; temperature
• ULTRASONIC SOLDERING OF Cu AND Al2O3 CERAMICS BY USE OF Bi-La AND Bi-Ag-La SOLDERS by Koleňák, Roman; Prach, Michal; Kostolný, Igor (2016) - The Bi-Ag – based solder with 2wt.% lanthanum addition and Bi solder with 2wt.% lanthanum addition were studied. Quantitative analysis of chemical composition in selected zones of Bi2La solder. Keywords: analysis; bi2la; fig; joint; solder; soldering; temperature
• RESIDUAL PROPERTIES OF FIBER-REINFORCED REFRACTORY COMPOSITES WITH A FIRECLAY FILLER by Jogl, Marcel; Reiterman, Pavel; Holčapek, Ondřej; Koťátková, Jaroslava; Konvalinka, Petr (2016) - Microstructural changes and residual properties of fiber reinforced cement composites exposed to elevated temperatures. Our experimental program has confirmed the great potential of ceramic powder, and especially metakaolin, as a supplementation material for alumi- nous cement in high alumina cement based composites. Keywords: cement; ceramic; composites; materials; properties; strength; temperature
• EXPERIMENTAL LEVELLING AT THE INTERFACE OF OPTICAL ENVIRONMENTS by Sirůčková, Hana (2016) - Calibration of temperature sensors Temperature sensors were immersed in water to elimi- nate short-term environmental influences, and were all in the same condition. 2/2016 Experimental Levelling at the Interface of Optical Environments Date A1–A3 (mm) Difference from levelling line around (mm) dL (mm) Difference from levelling line around minus correction of dL (mm) 3 November 2013 Koni 007 20.30 0.57 0.23 0.34 1 December 2013 Koni 007 20.50 0.37 0.41 −0.04 27 July 2014 Koni 007 21.50 −0.77 −0.28 −0.49 8 February 2015 Koni 007 21.90 −1.17 −0.74 −0.43 9 February 2014 DNA 03 20.69 0.04 0.27 −0.23 6 April 2014 DNA 03 20.60 0.13 −0.31 0.44 27 July 2014 DNA 03 21.63 −0.89 −0.63 −0.26 8 February 2015 DNA 03 21.75 −1.02 −0.47 −0.55 Table 5. Keywords: building; levelling; line; refraction; temperature
• SIMULATION OF SURFACE HEATING FOR ARBITRARY SHAPE’S MOVING BODIES/SOURCES BY USING R-FUNCTIONS by Plankovskyy, Sergiy; Shypul, Olga; Tsegelnyk, Yevgen; Tryfonov, Oleg; Golovin, Ivan (2016) - 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: body; functions; heat; method; problem; source; surface; temperature
• LABORATORY TESTING OF THE LEICA AT401 LASER TRACKER by Dvořáček, Filip (2016) - Keywords: laser tracker; Leica AT401; laboratory testing; firmware error; length metrology. It is expected that all findings presented here for Leica AT401 are also valid for the AT402 model. Keywords: at401; distance; instrument; laboratory; laser; leica; measurements; refractive; temperature; tests; tracker
• A METHOD FOR MEASURING THE SENSITIVITY OF BUILDING STRUCTURAL MEMBERS TO FIRE DECAY PHASES by Gernay, Thomas (2016) - This work presents an analysis of the behaviour of different structural members under natural fires, and develops a method for characterizing their sensitivity to fire decay phases. Thermo-mechanical numerical simulations based on the non-linear finite element method are conducted using the parametric fire model of the Eurocode to represent natural fires. Keywords: column; dhp; figure; fire; load; member; temperature
• APPLICATION OF DIMENSIONAL ANALYSIS IN HEAT LOSS DETERMINING IN DISTRICT HEATING SYSTEMS by Čarnogurská, Mária; Dobáková, Romana; Příhoda, Miroslav (2016) - Dimensional analysis enables a new point of view that demonstrated the functionality of heat loss from selected physical quantities that contribute to heat loss. Transforming these criteria of similarity leads to the formulation of the functional dependence of only two criteria, on the basis of which the amount of heat loss can be determined. Keywords: flow; heat; heat loss; loss; temperature; water
• EXPERIMENTAL METHOD ON INVESTIGATION OF FIBRE REINFORCED CONCRETE AT ELEVATED TEMPERATURES by Goremikins, Vadims; Blesak, Lukas; Novak, Josef; Wald, Frantisek (2016) - Currently, a lack of information considering tensile and post cracking behaviour of FRC at elevated temperatures is an issue to be faced. Keywords: temperature distribution; elevated temperature; four-point bending test; compressive and tensile tests. Keywords: concrete; fig; heating; specimens; steel; temperature; test; testing
• Measurement of Moisture Fields in the Bridge Structure of Charles Bridge by Římal, J. (2002) - Temperature field measurement was conducted independently throughout a one-year cycle. Temperature field measurements therefore had to be con- ducted parallel to moisture field measurements of the Charles bridge structure. Keywords: bridge; charles; concrete; field; measurement; moisture; temperature
• MAGNETRON SPUTTERING WITH HOT SOLID TARGET: THERMAL PROCESSES AND EROSION by Borduleva, Alena Olegovna; Bleykher, Galina Alekseevna; Sidelev, Dmitrii Vladimirovich; Krivobokov, Valeriy Pavlovich (2016) - Creating evaporation on the surface of a high-power pulsed magnetron target by insulating it thermally could be a way to increase the coating deposition rate, due to the fact that it occurs continuously, and the particles removed from the surface between pulses will not be involved in the ionization processes near the target. Sputtering yield increase with target temperature for Ar. Keywords: energy; evaporation; heat; magnetron; power; rate; sputtering; surface; target; temperature
• EXPERIMENTAL DETERMINATION OF TEMPERATURES IN SPARK GENERATED BUBBLES OSCILLATING IN WATER by Vokurka, Karel (2017) - Intensity of oscillation of spark generated bubbles. 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. Keywords: bubble; core; figure; plasma; radius; rm1; spark; temperature; time; θm1
• ELECTRICAL AND THERMODYNAMIC PROPERTIES OF A COLLAGEN SOLUTION by Štancl, Jaromír; Skočilas, Jan; Landfeld, Aleš; Žitný, Rudolf; Houška, Milan (2017) - 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: capacity; collagen; conductivity; heat; material; measurements; sec; temperature
• CYCLIC TEMPERATURE LOADING RESIDUAL FLEXURAL STRENGHT OF REFRACTORY SLABS by Holčapek, Ondřej; Reiterman, Pavel; Konvalinka, Petr (2017) - Tensile strength in bending of these slabs (after cyclic temperature loading at 600 °C) achieved 6.0MPa. The aim of this article is to investigate the effect of cyclic temperature loading at two levels – 600 °C and 1000 °C. Keywords: cement; concrete; fibres; loading; refractory; slabs; strength; temperature
• THE IMPACT OF SELECTED PROCESSES AND TECHNOLOGICAL PARAMETERS ON THE GEOMETRY OF THE WELD POOL WHEN WELDING IN SHIELS GAS ATMOSPHERE by Bradáč, Josef; Moravec, Jaromír (2017) - Role of sulfur and processing variables on the temporal evolution of weld pool geometry during mutikilowatt laser beam welding of steel. Double ellipsoidal heat source model enables simulations with very good agreement with the reality, especially when simulating the electric arc welding processes. Keywords: current; diameter; figure; geometry; heat; parameters; pool; temperature; weld pool; welding; wire
• A METHOD FOR EVALUATION OF NON-UNIFORM RADIANT-CONVECTIVE LOAD ON HUMAN BODY DURING MENTAL WORK by Prokšová Zuská, Lenka; Kabrhel, Michal (2017) - The physical parameters of air were continuously measured: the air temperature, globe temperature, air velocity, radiant temperature, relative humidity, stereotemperature and physiological parameters. Globe Stereothermometer Measurement Measured physical parameters were ta, va, the relative humidity and radiant temperature measured in the direction of the radiation trA and on the opposite side trB. Those values were measured by Indoor Climate Analyzer type 1213, Brüel and Kjaer. Keywords: conditions; environment; globe; non; radiant; temperature
• APPLICATION OF THE TEMPERATURE OSCILLATION METHOD IN HEAT TRANSFER MEASUREMENTS AT THE WALL OF AN AGITATED VESSEL by Solnař, Stanislav; Dostál, Martin; Petera, Karel; Jirout, Tomáš (2018) - 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: coefficients; figure; flow; heat; heat transfer; impeller; method; number; nusselt; reynolds; surface; temperature; turbine; vessel; wall
• THERMOCHEMICAL CALCULATIONS USING SERVICEORIENTED ARCHITECTURE IN THE WEB SERVICE FORM by Horovčák, Pavel; Terpák, Ján (2018) - Keywords: thermochemical calculation; chemical reaction; service-oriented architecture; web service. Web services and cloud computing Keywords: application; calculations; chemical; chemical reaction; equilibrium; error; form; functions; language; reaction; service; temperature; web; web service
• APPLICABILITY OF CARBON FIBRES IN REFRACTORY CEMENT COMPOSITES by Holčapek, Ondřej; Reiterman, Pavel; Konvalinka, Petr (2018) - The main objective of this article is to present the influence of high temperatures on mechanical properties of advanced refractory cement composite reinforced with carbon fibres. The action of high temperatures was investigated on two temperature levels 600 °C and 1000 °C and was compared to reference specimens dried at 105 °C. Keywords: carbon; cement; ceramic; composite; fibres; fracture; refractory; strength; temperature
• EFFECT OF THE APPLICATION OF MICROWAVE ENERGY ON THE REGENERATION OF THE ADSORBENT by Dobrotvorskiy, Sergey; Aleksenko, Borys; Dobrovolska, Ludmila; Basova, Yevheniia (2018) - ρ0(cp)pth(T3 − T2) + Md(cp)d +Mv(cp)v(T3 − T1) + q1 ρ0(cp)pth(T3 − T2) , (1) where Qp — amount of purge air; Mw — mass of adsorbed water, kg/column; Md — mass of adsorbent, kg/column; Mv — mass of purge air, kg/column; Ha — heat of adsorption, J/mol; cp — specific heat; q1 — external heat loss; ρ0 — air density (at sea level, at 75 °C = 1.225 kg/m3); T1 — initial temperature of the adsorbent, °C; T2 — purge air temperature at the inlet, °C; T3 — purge air temperature at the outlet, °C; th — heating regeneration time, s. It should also be taken into account that silica gel loses its useful properties when it overheats above 200 °C. Ac = Qcρ0tc 1.25Md , (2) where Ac — amount of cooling air; Md — mass of adsorbent, kg/column; Qc — cooling air consump- tion, m3/sec; ρ0 — air density (at sea level, at 15 °C, 1.225 kg/m3); tc — cooling time, s. It should be noted that if the first stage of the re- generation process takes place at a lower temperature, this reduces the time of the regeneration process by reducing the cooling time of the adsorbent in the sec- Keywords: adsorbent; adsorption; air; energy; fig; microwave; moisture; process; regeneration; regeneration process; temperature; volume
• JATROPHA OIL WITH IRON NANOPARTICLES APPLICATION IN DRILLING PROCESSES by Shalimba, Veikko; Sopko, Vít (2019) - 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. A performance of heat transfer fluids has a substantial influence on the size, weight and cost of heat transfer systems, therefore, a high-performance heat transfer fluid is very important in many industries. Keywords: iron; nanoparticles; oil; samples; temperature; time
• Non-Thermal Plasma Ozone Generation by Pekárek, S. (2003) - 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; discharge; gas; generation; ozone; plasma; temperature; � �
• PARTICULARS OF ADSORBENT REGENERATION WITH THE USE OF MICROWAVE ENERGY by Dobrotvorskiy, Sergey; Dobrovolska, Ludmila; Basova, Yevheniia; Aleksenko, Borys (2019) - [8] with hot regeneration of adsorbent (I), adsorption column with the built-in heater in the regeneration stage (II) and the computer model of this column (III): 1 is the body of adsorption column; 2 is the internal heater; 3 is the inlet of the non-heated dry purge air; 4 is the output of the heated, moisture-saturated purge air. The study begins with the calculation of the flow in the cavity of adsorption columns. 4.1.1. Keywords: adsorbent; adsorption column; air; cooling; figure; heat; heater; ht adsorption; process; regeneration; temperature; volume
• OPTIMIZATION OF BIODIESEL PRODUCTION FROM WASTE FRYING OIL OVER ALUMINA SUPPORTED CHICKEN EGGSHELL CATALYST USING EXPERIMENTAL DESIGN TOOL by Yusuff, Adeyinka S.; Popoola, Lekan T. (2019) - 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. Plot of biodiesel yield (Y ) versus reaction time (t) at reaction temperature of 50 °C and 65 °C, 2wt.% catalyst loading and 6 : 1 methanol/oil molar ratio 3.2.2. Keywords: analysis; biodiesel; catalyst; methanol; oil; production; ratio; reaction; temperature; time; transesterification; yield
• Effect of Temperature and Age of Concrete on Strength – Porosity Relation by Zadražil, T.; Vodák, F.; Kapičková, O. (2004) - 180 days confirms generally accepted hypothesis that with increasing porosity strength of the concrete decreases. 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. There are many attempts to express the relation S � S(P) in an analytical form. Keywords: age; concrete; days; porosity; temperature
• NON-DESTRUCTIVE INSPECTION BY INFRARED THERMOGRAPHY OF RESISTANCE SPOT WELDS USED IN AUTOMOTIVE INDUSTRY by Forejtová, Lucie; Zavadil, Tomáš; Kolařík, Ladislav; Kolaříková, Marie; Sova, Jan; Vávra, Petr (2019) - 3/2019 Non-destructive inspection of resistance spot welds. . The standard methods used for the defect detection in resistance spot welds are the ultrasonic testing (UT) and visual testing (VT). Keywords: batch; q(t; quality; resistance; spot; temperature; testing; welding; welds
• HEAT FLUX JUMP METHOD AS A POSSIBILITY OF CONTACTLESS MEASUREMENT OF LOCAL HEAT TRANSFER COEFFICIENTS by Solnař, Stanislav; Dostál, Martin (2019) - Keywords: Heaviside function, heat transfer coefficient, experimental method, heat jump method. 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: coefficient; heat; heat transfer; method; temperature; transfer; transfer coefficient; values; wall
• EXTRACTION AND EVALUATION OF OIL FROM GREEN ALGAE CLADOPHORA GLOMERATA BY HEXANE/ETHER MIXTURE by Yusuff, Adeyinka Sikiru; Ewere, Donatus (2020) - 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 Optimization of oil extraction from Leucaena leucocephala seed as an alternative low-grade feedstock for biodiesel production. Keywords: acid; algal; extraction; fatty; oil; particle; size; solvent; temperature; time; yield
• Numerical Analysis of the Temperature Field in Luminaires by Murín, J.; Kropáč, M.; Fric, R. (2004) - 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) 2/2004 Surface emissivity 0.7 0.8 0.9 Coef. of convection 7.5 8.5 9.5 Final maximum temperature [ °C] 72.9 67,3 62.9 Final minimum temperature [ °C] 55.1 50 45.9 Table 4: Temperature of the choke coil in extreme cases Fig. 9: Temperature field of the iron magnetic circuit (� � 8.5 W/m2K; � � 0.8) Fig. Keywords: choke; coil; heat; surface; temperature; � �
• TRACK GAUGE STABILITY UNDER EFFECT OF SLEEPER THERMAL EXPANSION by Lojda, Vít; Krejčiříková, Hana (2019) - The main objective of this article is to describe the role of the thermal expansion, represented by a coefficient of linear thermal expansion α, in the devel- opment of polymer railway sleepers and to consider the range of α with respect to their production. [23] where the limit value of the coefficient α for polymer sleepers required by American Rail- way Engineering and Maintenance-of-Way Association (AREMA) is 7.5 · 10−5 K−1 Keywords: coefficient; expansion; gauge; polymer; railway; rep; rep_c; sleeper; temperature; track
• OPTIMIZATION OF A SMALL SOLAR CHIMNEY by Castro Silva, Janaina Oliveira; Maia, Cristiana Brasil (2020) - 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. Keywords: airflow; analysis; chimney; collector; doi:10.1016; efficiency; energy; geometry; height; optimization; parameters; power; radiation; rate; solar; temperature
• THE INFLUENCE OF THE FIBRES ARRANGEMENT ON HEAT TRANSFER AND PRESSURE DROP OF POLYMERIC HOLLOW FIBRE HEAT EXCHANGERS by Kůdelová, Tereza; Kroulíková, Tereza; Astrouski, Ilya; Raudenský, Miroslav (2020) - Keywords: Polymeric hollow fibre, heat exchanger, heat transfer. Polymeric hollow fibre heat exchangers are the new alternative to common metal heat exchangers. Keywords: exchangers; fibres; heat; pressure; temperature; transfer
• THE CONDENSATION OF WATER VAPOUR IN A MIXTURE CONTAINING A HIGH CONCENTRATION OF NON-CONDENSABLE GAS IN A VERTICAL TUBE by Havlík, Jan; Dlouhý, Tomáš; Krempaský, Jakub (2020) - 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: condensation; condensation htc; heat; htc; mixture; steam; steam condensation; temperature; transfer; tube; water
• Temperature of Steel Columns under Natural Fire by Wald, F.; Studecká, P.; Kroupa, L. (2004) - The accurate and simple step-by-step calculation proce- dure is based on the principle that the heat entering the steel over the exposed surface area in a small time step � t (taken as 30 seconds maximum) is equal to the heat required to raise the temperature of the steel by �a,t (at time t) assuming that the steel section is a lumped mass at uniform temperature, so that � , ,�� �q F t c Va a t a t� �� � , (1) where �a is the unit mass of steel, ca,t is the temperature de- pendent specific heat of steel, V is the volume of the member per unit length, and ���q is the heat transfer at the surface, given by � ( ) ( ), , , ,�� � � � �q hc g t a t g t a t� � � �� � � � � �4 4 , (2) where hc is the convective heat transfer coefficient, � is the Stefan-Bolzman constant (56.7 10�12 kW m�2 K�4), � is the resultant emissivity, and �� g t, is the increase of the ambient gas temperature during the time interval � t. Eqs (1) and (3) may be rearranged to give � �� � � � � �� � � � �� � �a t m a a c g t a t g t a t A V c h t, , , , ,( ) ( )� � � �4 4 , (3) where Am/V is the section factor for unprotected steel mem- bers, Am is the surface area of the member per unit length. i, ,� �2 , where Ai is the cross-section area of the insulating material and A is the cross-section area of the steel. Keywords: column; compartment; fig; fire; m �; min; steel; temperature; � �
• A COMBINED STRAIN ELEMENT TO FUNCTIONALLY GRADED STRUCTURES IN THERMAL ENVIRONMENT by Ton-That, Hoang Lan (2020) - Finite element analysis of functionally graded skew plates in thermal environment based on the new third-order shear deformation theory. A formulation of general shell elements-the use of mixed interpolation of tensorial components. Keywords: analysis; bending; element; materials; plates; shear; strain; structures; sus304; temperature; theory
• NEW METHOD EVALUATION OF DETAIL MATERIAL AND HEAT FLOWS FOR SINGLE STRING CEMENT CLINKER PLANT by Darmanto, Prihadi Setyo; Astina, I Made; Wardhana, Alfian Kusuma; Amalia, Alfi; Syahlan, Arief (2021) - Heat flow of kiln feed gas resulting from the calcination process, mostly CO2, exits from SP (Eq. 19): Engas−kf = mgas−kf · hCO2(Thg1) The results of the mass and heat conservation calculation for each cyclone is highly useful for designing equipment, controlling the process and modifying equipment (e.g., estimating the rate of kiln feed flow to the calciner). Keywords: air; cement; clinker; conservation; cooler; cyclone; feed; flow; gas; heat; heat conservation; heat flow; kiln; kiln feed; mass; plant; process; temperature
• DEPENDENCE OF THE VISCOSITY COEFFICIENT OF THE NIOSOMAL DISPERSION ON THE TEMPERATURE AND PARTICLE SIZE OF THE DISPERSED PHASE by Diskaeva, Elena Igorevna; Vecher, Olga Vladimirovna; Bazikov, Igor Alexandrovich; Elbekyan, Karine Sergeevna; Diskaeva, Elena Nikolaevna (2021) - Viscosity coefficients dispersions with different vol- ume concentrations differ and grow with an increase in the diameter of niosomal vesicles. The aim of this study was to experimentally investigate the dependence of viscosity coefficient of niosomal dispersion based on PEG-12 Dimethicone on the temperature and size of niosomes vesicles. Keywords: coefficient; dependence; dispersion; niosomal; niosomes; particle; size; temperature; viscosity
• Process optimization and performance evaluation of a downdraft gasifier for energy generation from wood biomass by Daniyan, Ilesanmi; Ale, Felix; Uchegbu, Ikenna Damian; Bello, Kazeem; Osazele, Momoh (2021) - [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: biomass; conversion; energy; gas; gasifier; optimization; particle; process; residence; size; temperature; time; wood; wood biomass; yield
• 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 by Suk, Tomáš; Štroner, Martin (2021) - 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. 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 Keywords: accuracy; angle; atmosphere; beam; data; day; geodetic; gradient; measurement; refraction; temperature; vertical; zenith
• On a static and dynamic calibration of thermochromic liquid crystals by Solnař, Stanislav; Medek, Jan; Suleiman, Abubakar Shola; Vyhlídal, Patrik (2021) - 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: calibration; colour; curve; experiment; layer; light; measurement; surface; temperature; tlc
• The Design and Development of Enhanced Thermal Desorption Products by Humble, R.; Millward, H.; Mumby, A.; Price, R. (2005) - 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: cad; cold; company; design; desorption; development; ktp; process; product; temperature; trap
• Vibration Damping of a New Ionic Liquid under Electric Field Effect by Bicak, M. M. A.; Belek, H. T.; Göksenli, A. (2005) - � � � �5265 19195 T , where � denotes viscosity in terms of cP, and T is tempera- ture (K). 3 Ionic liquids are salts which are fluids at around room tem- perature. Keywords: conductivity; effect; field; fluids; liquid; temperature
• Application of additional insulation to ETICS on surfaces with biocorrosion by Antošová, Naďa; Šťastný, Patrik; Petro, Marek; Krištofič, Štefan (2021) - An effective solu- tion for eliminating microorganisms on the surface of insulation systems can be a new radical technology combined with the repair of existing ETICS construc- tion, i. e., the technology of DOUBLE ETICS. The aim was to investigate the possibility of applying double insulation onto the original ETICS, after recording the existing condi- tions in the layers of DOUBLE ETICS which could have an impact on the survival and development of biocorrosion on the original facade. Keywords: etics; experiment; gap; humidity; insulation; layer; microorganisms; results; samples; surface; temperature
• Analysis of factors affecting the efficiency of Jatropha curcas oil as an asphaltene stabiliser by Marín Velásquez, Tomás Darío; Arriojas Tocuyo, Dany Day Josefina (2022) - The efficiency of J. curcas oil and the influence of the type of crude oil on the results obtained were demonstrated. However, the de- tailed molecular composition of asphaltenes remains unknown in many cases, which is because crude oil is made up of millions of different organic molecules and asphaltenes are the most complex of all [4]. Keywords: aii; asphaltene; crude; curcas; curcas oil; dose; efficiency; heating; oil; results; sample; temperature
• Low earth orbit nanosatellite: influence of heat dissipation on passive thermal analysis by Akka, Amine; Benabdelouahab, Farid; Yerrou, Randa (2022) - A simple shape of nanosatellites will narrow the range of tem- peratures experienced by internal components, and also outer irradiance coming from the Sun and the Earth if absorptance α and emissivity ϵ, which are the primary means of passive thermal control, are well-chosen, depending on the material used [8–14]. Nanosatellite case study: Issue of heat dissipation across passive thermal analysis. Keywords: analysis; case; conditions; control; earth; heat; nanosatellite; radiation; temperature
• CFD simulation of partial channel blockage on plate-type fuel of TRIGA-2000 conversion reactor core by Dibyo, Sukmanto; Luthfi, Wahid; Pinem, Surian; Irianto, Ign Djoko; Sriwardhani, Veronica Indriati (2022) - 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 Keywords: blockage; channel; coolant; figure; flow; fuel; plate; reactor; temperature; type
• Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler by Jeníková, Jitka; Michaliková, Kristýna; Hrdlička, František; Hrdlička, Jan; Pilař, Lukáš; Vodička, Matěj; Skopec, Pavel (2022) - 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. *BAT-AELs (mg/Nm3) for NOX emissions from combustion of black and/or brown coal into the atmosphere for the new combustion plants with the total rated thermal output < 100 MWth of 100–150 mg/mN 3 [23]. for the SNCR due to the properties of ammonia, which has very strict storage rules, and therefore is not used in large industrial plants for the SNCR method. Keywords: agent; bed; boiler; combustion; denitrification; gas; measures; method; nox; reduction; scr; sncr; temperature
• Experimental verification of the impact of the air staging on the NOx production and on the temperature profile in a BFB by Vodička, Matěj; Michaliková, Kristýna; Hrdlička, Jan; Skopec, Pavel; Jeníková, Jitka (2022) - 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; bed; bfb; case; combustion; facility; freeboard; gas; kwth; nox; temperature
• Experimental verification of the efficiency of selective non-catalytic reduction in a bubbling fluidized bed combustor by Michaliková, Kristýna; Hrdlička, Jan; Vodička, Matěj; Skopec, Pavel; Jeníková, Jitka; Pilař, Lukáš (2022) - Dependence of NOX reduction efficiency on temperature for different NSRs. Dependence of NOX reduction efficiency on NSR for different temperatures. Keywords: air; bed; combustion; freeboard; nox; reduction; sncr; temperature; urea
• Experimental and simulation study of CO2 breakthrough curves in a fixed-bed adsorption process by Nedoma, Marek; Staf, Marek; Hrdlička, Jan (2022) - Blank exper- iments have been carried out using inert material (glass beads of the same total volume as the real sample) prior to CO2 adsorption. Similar differences between isothermal and non-isothermal models using the LDF model for CO2 adsorption were observed by [48]. Keywords: adsorbent; adsorption; bar; bed; breakthrough; capture; co2; column; curve; engineering; figure; flow; gas; mass; pressure; temperature; time
• Design and simulation of a bearing housing aerospace component from titanium alloy (Ti6Al4V) for additive manufacturing by Oyesola, Moses; Mpofu, Khumbulani; Daniyan, Ilesanmi; Mathe, Ntombi (2022) - However, titanium is more suit- able for high temperature applications though there is a need for the investigation of the thermal loads necessary for such service requirement because of its low thermal conductivity that can result in build-up stresses Component simulations are very important in determining generic performances and can provide a comprehensive way to understand the behaviour of components or a material in service before the manu- facturing process Keywords: aerospace; alloy; bearing; component; conditions; design; figure; housing; loading; manufacturing; material; mesh; process; simulation; slm; strength; stress; temperature; ti6al4v; titanium
• Heat transfer characteristics of double pipe heat exchanger having externally enhanced inner pipe by Vijayaragavan, Balasubramanian; Asok, Suyambu Pandian; Shakthi Ganesh, Chandrasekar Ramalekshmi (2023) - Keywords: Double pipe heat exchanger, heat transfer, numerical analysis, rectangular cavity. 63 no. 1/2023 Heat transfer characteristics of double pipe heat exchanger . . Keywords: figure; flow; fluid; heat; heat exchanger; heat transfer; pipe; pipe heat; temperature; transfer; tube
• Parametric study of the energy potential of a building’s envelope with integrated energy-active elements by Kalús , Daniel; Koudelková, Daniela; Mučková, Veronika; Sokol, Martin; Kurčová, Mária; Šťastný, Patrik (2022) - The predetermination of these building structures for the application of renewable energy sources and waste heat represents an energy-secure and self-sufficient technical solution as a fully-fledged alternative to energy systems dependent on fossil fuels. Optimization of energy systems with long-term heat accumulation. Keywords: building; energy; exterior; heat; heating; interior; k)−1; layer; pipes; structure; temperature
• Experience of Implementing Moisture Sorption Control in Historical Archives by Zítek, P.; Vyhlídal, T.; Chyský, J. (2006) - It is easy to prove that the temperature ratios in (4) are close to one, even if there are substantial differences in B. Consequently the humidity logarithm ratios are also close to one and therefore the re- quired humidity readjustments �M � �0 and �N � �0 have rather low values and cannot differ from each other substan- tially. [5], are used to describe the relationship be- tween EMC as u, and the pair of air temperature T and rela- tive air humidity �, u � �(�, T). Keywords: air; content; control; humidity; moisture; sorption; temperature; � �
• Optimal (Comfortable) Operative Temperature Estimation Based on Physiological Responses of the Human Organism by Jokl, M. V.; Kabele, K. (2006) - � � � � �9 07 7 5 157 W�m�2 ��, G q T Tt,m, m i sk min . . � � � � � � �157 366 305 96 2 , i.e. �4.8 W�m�2, where G G Gtt,i, t, i, t,m,min min min . . . Keywords: body; fig; heat; temperature; values; � �
• Response Analysis of an RC Cooling Tower Under Seismic and Windstorm Effects by Makovička, D. (2006) - The starting values of the Winkler-Pasternak constants were selected as follows: C1z � 3.5 MN/m3, C1x � C1y � 2.0 MN/m3, C2x � C2y � 50 MN/m. 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. Keywords: load; structure; temperature; towers; walls; wind
• Assessing the efficacy of flat-plate solar collectors using nanofluids in the climatic context of Kirkuk city, Iraq by Hussein, Adnan M.; Mohammed Ali, Hussein Hayder; Ali, Zahraa (2024) - [17] studied the effects of nanocellulose (CNC) nanofluids on im- proving flat plate solar collector efficiency. Experimental investigation of new design of solar water distillation coupled with flat plate solar water collector. Keywords: collector; cuo; efficiency; figure; flow; nanofluid; plate; radiation; rate; s−1; temperature; water
• Assessment of structures repeatedly exposed to thermal loading and extinguishing water: a case study of a firefighting training facility by Müller, Petr; Benýšek, Martin; Štefan, Radek; Holan, Jakub; Košťálová, Šárka (2023) - Eurocode 3: Design of steel structures – part 1-2: General rules – structural fire design, 2005. This technical report deals with the classification of concrete struc- tures only, steel structures are not included. Keywords: assessment; building; capacity; concrete; figure; fire; floor; gas; load; results; steel; strength; structure; temperature
• Prediction of temperature field distribution in a gas turbine using a higher order neural network by Pařez, Jan; Kovář, Patrik; Tater, Adam (2023) - This paper presents the prediction of temperature field distribution in a single annular section using an artificial neural network (ANN). Introduction The cooling process and temperature distribution of solid parts in gas turbines is critical to their reliable operation and maximum performance. Keywords: cfd; data; distribution; engine; error; figure; gas; heat; learning; order; results; set; temperature; tube
• Hydrothermal and mechanical performance of mortars containing waste brick powder by Brixi, Abderrahim; Ghembaza , Moulay Smaïne; Boudenne , Abderrahim (2024) - Therefore, future research that integrates these aspects could provide a more holis- tic view of the behaviour of brick crumb mortars and their suitability in different environmental con- texts. Additionally, brick crumb mortars offer a combi- nation of properties that make them suitable for a range of applications in wet and dry, ambient and 323 A. Brixi, M. S. Ghembaza, A. Boudenne Acta Polytechnica elevated temperature environments, whilst providing additional ecological benefits including: (1.) Keywords: brick; brick powder; cement; concrete; days; environment; figure; materials; mortar; powder; properties; strength; temperature; waste; water; ° c
• Precipitation of oxide dispersion strength steels after long-term annealing at temperature of 475 °C by Košovský, Dávid; Miglierini, Marcel; Kmječ, Tomáš; Dekan, Július; Bujdoš, Marek (2024) - Chemical analysis The qualitative analysis of ODS steel samples was performed by XRF. Metal- lic materials in powder form enriched with yttrium oxide particles (Y2O3) with a purity between 99 % and 99.5 % were used as precursors for the produc- tion of PM80KhV2 steel samples. Keywords: alloys; annealing; atoms; chromium; concentration; figure; journal; materials; ods; phase; precipitates; sample; steels; temperature; time
• Impact of process parameters on the mechanical and surface properties of AA6082 by Tunca, Bilgehan; Karaca, Bahadır (2025) - Extrusion process parameters. Heat treatment process The 6XXX aluminium alloy series, defined as the Al- Mg-Si system, contains magnesium (Mg) and silicon (Si) as major elements. Keywords: alloy; aluminium; grain; parameters; process; properties; samples; surface; temperature; treatment

• An Investigation of the Erosion Wear of Pitched Blade Impellers in a Solid-Liquid Suspension by Jirout, T.; Fořt, I. (2008) - (15), h�1 cV average volumetric concentration of solid parti- cles, m3 �m�3 D impeller diameter, m Do hub diameter, m dp average diameter of solid particles, m H height of liquid from bottom of the vessel, m H dimensionless transversal coordinate of the profile of the worn blade h width of impeller blade, m k wear rate constant m weight of impeller blade, kg n impeller speed, s�1 R regression coefficient R dimensionless longitudinal (radial) coordinate along the radius of the impeller blade r longitudinal (radial) coordinate along the radius of the impeller blade, m s thickness of the impeller blade, m T vessel diameter, m t time, h y transversal coordinate along the width of the blade, m Greek symbols � pitch angle of the blade, deg �l density of liquid, kg�m�3 � dynamic viscosity, Pa�s Indices av average value j summation index n related to the concentration of solid particles d related to the diameter of the particles t related to time o initial value © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 25 Acta Polytechnica Vol. 48 No. 4/2008 0 0.05 0.1 0.15 0.2 0.25 0 20 40 60 80 100 t A four-blade pitched blade impeller (pitch angle � � 30°), pumping downwards, was investigated in a pilot plant fully baffled agitated vessel with a water suspension of corundum. Keywords: blade; impeller; time; wear; � �
• Dirac fermion in a time-dependent spherical box by Matchonov, Kuvonchbek; Matrasulov, Davron; Dittrich, Jaroslav (2025) - Dirac particle in a spherical box The Dirac equation on confined domains has been studied in [11–16]. For a massless Dirac particle, i.e. for m = 0, the average coordinate can be defined using (18) for R0(t) Keywords: box; dirac; equation; particle; quantum; r0(t; time
• Demand Modelling in Telecommunications by Chvalina, M. (2009) - i i � � � � 0 because � �( )1 1 0 � � � � � i applies to the mean value and dispersion E y E yt t( � ) ( )� � �0, D yt a y( � ) � � � � � � � � � � 2 2 2 2. 48 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 49 No. 2–3/2009 Demand Modelling in Telecommunications Comparison of Standard Statistical Methods and Approaches Based upon Artificial Intelligence Methods Including Neural Networks M. Chvalina This article analyses the existing possibilities for using Standard Statistical Methods and Artificial Intelligence Methods for a short-term forecast and simulation of demand in the field of telecommunications. Network signal propagation: V g h g w Vi l i l ij l j l k � � � � � � � � � � ��( ) 1 . 4. Keywords: demand; series; t t; t �; time; y y; � �
• Agent-based Simulation of the Maritime Domain by Vaněk, O. (2010) - 50 No. 4/2010 Table 1: Main parameters of different types of vessel agents. Table 1 summarizes the main parameters of each type of vessel agent. Keywords: agent; data; fishing; information; modules; simulation; time; transport; vessel
• Cosmos, Time and Creation (Remarks to the Philosophical, Theological and Physical Conceptions of Creation) by Zamarovský, P. (2010) - Keywords: Big Bang, creation, cosmos, time scale, imaginary time, horizon, singularity. ap-6-10.dvi Acta Polytechnica Vol. 50 No. 6/2010 Cosmos, Time and Creation Remarks to the Philosophical, Theological and Physical Conceptions of Creation P. Zamarovský Keywords: clocks; creation; god; scale; time
• Timing Analysis with INTEGRAL: Comparing Different Reconstruction Algorithms by 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. (2011) - So while a better noise correction is re- quired, ii light lightcurves are still well suited for timing studies with a 10 s to 0.1 s resolu- tion in the regime above 20 keV. 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. For higher time resolution, ii light produces meaningful results, although the overall variance of the lightcurves is not preserved. Keywords: light; resolution; time
• On the Intrinsic Simplicity of Spectral Variability of GRBs by Chernenko, A. (2011) - 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: correlation; eigenvalues; light; time; variability
• Optimization of a Water Window Capillary Discharge Radiation Source by Stefanovič, M.; Vrbová, M. (2011) - Keywords: water window radiation, capillary discharge, soft X rays, nitrogen plasma. The role of capillary shielding In capillary discharge systems, the dielectric capillary is often surrounded by another metal in order to re- duce the overall inductance in the discharge circuit. Keywords: capillary; discharge; gas; plasma; radiation; time
• A Pitch Detection Algorithm for Continuous Speech Signals Using Viterbi Traceback with Temporal Forgetting by Bartošek, J. (2011) - 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. Evaluation of pitch detection algorithms in adverse conditions. Keywords: algorithm; difference; frequency; function; pitch; results; speech; time
• A Neural Network Model for Predicting NOx at the Mělník 1 by Bukovský, Ivo; Kolovratník, Michal (2012) - 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. 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: data; figure; input; network; neural; nox; prediction; time
• A Study of Parameters Setting of the STADZT by Turoň, Václav (2012) - There are three parameters which closely relate to this issue — window shape, window length and segment overlap. [9] for spectral analysis of non-stationary signals. Keywords: resolution; signal; stadzt; time; window
• Research Trends for PID Controllers by Visioli, Antonio (2012) - Acta Polytechnica Vol. 52 No. 5/2012 Research Trends for PID Controllers Antonio Visioli University of Brescia, Via Branze 38, I-25123 Brescia, Italy Corresponding author: Keywords: PID controllers, design, tuning, control structures. Keywords: control; controllers; design; performance; pid; point; process; set; time; tuning; visioli
• A Network Simulation Tool for Task Scheduling by Votava, Ondřej (2012) - Keywords: task scheduling, DAG scheduling, simulation, network simulation. Task scheduling is the viewpoint, where a distributed application can be described as a Directed Acyclic Graph and every node of the graph is executed independently. Keywords: algorithms; application; computation; network; nodes; scheduling; simulation; systems; task; time
• Simulation of Free Airfoil Vibrations in Incompressible Viscous Flow — Comparison of FEM and FVM by Sváček, Petr; Horáček, Jaromír; Honzátko, Radek; Kozel, Karel (2012) - This corresponds to the results of the numeri- cal simulations presented since the system was found stable for upstream flow velocity 35m/s and unstable for upstream flow velocity 40m/s in the case of FEM and 42.5m/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: angle; fem; flow; fvm; method; numerical; rotation; time; velocity
• Status and Perspectives of the Mini-MegaTORTORA Wide-field Monitoring System with High Temporal Resolution by Karpov, Sergey; Beskin, Grigory; Bondar, Sergey; Perkov, Alexey; Ivanov, Evgeny; Guarnieri, Adriano; Bartolini, Corrado; Greco, Giuseppe; Shearer, Andy; Sasyuk, Vyacheslav (2013) - Keywords: gamma-ray bursts, high time resolution, wide field photometry. [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. Keywords: channel; detection; field; megatortora; monitoring; resolution; sky; time; transients
• The Construction of the Fast Resistive Bolometer for a SXR Measurement on the GIT-12 Facility by Cikhardt, Jakub; Klír, Daniel; Kubeš, Pavel; Kravárik, Josef; Rezác, Karel; Šíla, Ondrej; Shishlov, Alexander V.; Labetsky, Alexey Yu. (2013) - Introduction The ohmic bolometer is based on the principle of trans- formation of radiated energy into thermal energy. During the stagnation of the dense neon gas-puff, the most of kinetic energy of the Z-pinch is radiating in neon K-shell lines (hν ∼= 0.9÷1.4 keV) Keywords: bolometer; current; energy; foil; gas; time
• Long-Lived Plasma Process, Created by Impulse Discharge in Micro-Disperse Droplet Environment by Olszewski, Serge; Lisitchenko, Tamara; Yukhymenko, Vitalij (2013) - Photo of plasma processes in micro-disperse droplet environment, a) spark discharge between metal electrodes, b) sliding discharge along inside surface working vessel between high-voltage electrode and wa- ter surface, c) long-lived plasma process with spectral properties different from the previous discharges types. The duration current impulse of spark discharge was ≤ 10 µs. Fig. Keywords: discharge; drops; field; liquid; plasma; process; spark; time
• A Study of Coherent Radiation Generated in an Ablative Capillary Discharge by Hübner, Jakub; Vrba, Pavel (2013) - For capillary parameters N0 = 3 · 1017 cm−3, r0 = 0.6mm, Imax = 35 kA, t2 = 310 ns, carbon inner filling, and the alumina wall material. For capillary parameters N0 = 3 · 1017 cm−3, r0 = 0.6mm, Imax = 50 kA, t2 = 310 ns, carbon inner filling, and alumina wall material. Keywords: capillary; gain; imax; time
• Stationary and Dynamical Solutions of the Gross-Pitaevskii Equation for a Bose-Einstein Condensate in a PT symmetric Double Well by Cartarius, Holger; Dast, Dennis; Haag, Daniel; Wunner, Günter; Eichler, Rüdiger; Main, Jorg (2013) - This is always fulfilled for PT symmetric wave functions. In this article, we will solve the Gross-Pitaevskii equation of such a system and show that it indeed supports PT symmetric solutions. Keywords: equation; phys; pitaevskii; potential; solutions; symmetric; time; wave
• Algorithms for Solving Darcian Flow in Structured Porous Media by Kuráž, Michal; Mayer, Petr (2013) - preconditioner in the context of the conjugate gradient method for normal equations forms ATDTDA, and this form is not commonly used. However, it has been found that this standard method is highly efficient for solv- ing the systems of linear equations that arise from numerical approximation of the Richards equation. Keywords: condition; equation; mass; matrix; method; problem; richards; richards equation; solution; time
• The Effect of Kaolin Concentration on Flock Growth Kinetics in an Agitated Tank by Šulc, Radek; Svačina, Ondřej (2013) - Keywords: flocculation, flock growth, flock size, mixing, Rushton turbine, kaolin slurry, fractal geometry, image analysis. Theoretical background The dependence of flock size on flocculation time can be expressed by a simple empirical formula, taking into account flock breaking [5]: 1 df = Af log2(NtF) +Bf log(NtF) + Keywords: dimension; flocculation; flock; fractal; kaolin; size; time
• OPERA HIGHLIGHTS by Strauss, Thomas (2013) - Acta Polytechnica doi:10.14311/AP.2013.53.0512 Acta Polytechnica 53(Supplement):512–517, 2013 © Czech Technical University in Prague, 2013 available online at http://ojs.cvut.cz/ojs/index.php/ap OPERA HIGHLIGHTS Thomas Strauss∗, for the OPERA collaboration Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics, University of Bern, Sidlerstrasse 5, CH-3012 Bern ∗ corresponding author: thomas.strauss@lhep.unibe.ch Abstract. The OPERA experiment is a long baseline neutrino oscillation experiment aimed at observing the νµ → ντ neutrino oscillation in the CERN neutrino to Gran Sasso beamline in the appearance mode by detecting the τ-decay. Keywords: cern; decay; events; experiment; figure; neutrino; opera; time; vertex
• STUDY OF THE TIME DEPENDENCE OF RADIOACTIVITY by Bellotti, E; Broggini, C.; Di Carlo, G.; Laubenstein, M.; Menegazzo, R. (2013) - 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; data; decay; detector; source; time
• SEARCH FOR GRAVITATIONAL WAVES FROM SUPERNOVAE AND LONG GRBS by van Putten, Maurice H.P.M. (2013) - 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. Frame dragging induced outflows According to the Kerr metric, the angular momen- tum of rotating black holes induces frame dragging. Keywords: curve; energy; grbs; hole; light; neutron; supernovae; time; van
• ANALYSIS OF THE MACRO EXPERIMENT DATA TO COMPARE PARTICLE ARRIVAL TIMES UNDER GRAN SASSO by Ronga, Francesco (2013) - 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; data; macro; muons; neutrino; time; tracks
• NEUTRINOS FROM ICARUS by Farnese, Christian (2013) - In particular for CNGS neutrino events, using the “Early Warning Signal” sent from CERN to LNGS 80 ms be- fore each proton extraction, a 60µs 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. Furthermore the experimental energy deposi- tion spectrum of neutrino events agrees with the MC expectation assuming δ = 0. Keywords: beam; cern; cngs; detector; events; icarus; lar; neutrino; time; tpc
• QUANTIFICATION OF RESPIRATORY SINUS ARRHYTHMIA WITH HIGH-FRAMERATE ELECTRICAL IMPEDANCE TOMOGRAPHY by Antink, Christoph Hoog; Leonhardt, Steffen (2013) - In te rv a l [m s ] RMSE = 23.0382 ms, r = 0.91413 CRS ECG 0 20 40 60 80 100 120 150 200 250 300 P e a k D e la y [m s ] Time [seconds] t delay,mean = 203.683 ms ECG to EIT Figure 5. In te rv a l [m s ] RMSE = 33.4943 ms, r = 0.9393 CRS ECG 0 20 40 60 80 100 120 150 200 250 300 350 P e a k D e la y [m s ] Time [seconds] t delay,mean = 218.0469 ms ECG to EIT Figure 6. Keywords: bbi; crs; ecg; eit; heart; impedance; rate; run; time
• A NOVEL BCG SENSOR-ARRAY FOR UNOBTRUSIVE CARDIAC MONITORING by Böhm, Anna; Brüser, Christoph; Leonhardt, Steffen Leonhardt (2013) - However, optical sensors are prone to movement artifacts, as are other BCG sensors. Raw BCG signal. Keywords: bcg; beat; channel; heart; intervals; rate; sensor; signal; time
• LOW-MASS BINARY X-RAY SOURCES: MONITORING WITH VARIOUS SATELLITES by Šimon, Vojtěch (2014) - 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: asm; band; bat; data; monitors; outburst; ray; rxte; time
• SEARCH FOR ISOLATED BLACK HOLES: PAST, PRESENT, FUTURE by Karpov, Sergey; Beskin, Grigory; Plokhotnichenko, Vladimir (2014) - It uses photometric observations of candidate objects with high time resolution, special hardware and data analysis methods [14, 15], and is based on the fact that fast variability is the critical property of isolated black hole emission. 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. Keywords: accretion; emission; flow; hole; horizon; mass; objects; time
• Effect of the Distribution System on Drinking Water Quality by Grünwald, A.; Šťastný, B.; Slavíčková, K.; Slavíček, M. (2001) - 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. 3 Modeling of chlorine decay The first method for the decrease in chlorine in the bulk flow is based on first order kinetics [3]: c c k t t e� � � 0 1 where ct is the chlorine concentration in time t, in mg�l��, c0 chlorine concentration in time t = 0, in mg�l��, t time in days, k1 first order decay coefficient in d�1. Keywords: chlorine; solids; time; water; � �
• Study of the Blending Efficiency of Pitched Blade Impellers by Fořt, I.; Jirout, T.; Rieger, F.; Allner, R.; Sperling, R. (2001) - 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 � . [s] �U U� �2 % Fig. Keywords: blending; impeller; liquid; time; � �
• A HARDWARE-IN-THE-LOOP SIMULATOR BASED ON REAL SKODA SUPERB VEHICLE AND RT-LAB/CARSIM by Biroš, Milan; Kyslan, Karol; Ďurovský, František (2015) - 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: carsim; fig; gear; pedal; position; simulator; steering; superb; time; vehicle; wheel
• COMPARISON OF CLASSICAL AND INTERACTIVE MULTI-ROBOT EXPLORATION STRATEGIES IN POPULATED ENVIRONMENTS by Kalde, Nassim; Simonin, Olivier; Charpillet, François (2015) - 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: distance; environment; exploration; frontier; human; interaction; penalties; robot; time
• DECENTRALIZED MULTI-ROBOT PLANNING TO EXPLORE AND PERCEIVE by Matignon, Laetitia; Jeanpierre, Laurent; Mouaddib, Abdel-Illah (2015) - The idea is to take advantage of sparse interactions by allowing each robot to calculate locally a strategy that maximizes the explored space while minimizing robots interactions. at http://liris.cnrs.fr/laetitia.matignon/ research.html various exploration tasks with real robots, and some interesting situations are underlined as global task repartition or local coordination. Keywords: agent; decision; dvf; exploration; function; mdp; module; object; pictures; recognition; reward; robot; time
• Optimisation and Just-in-Time by Beran, V. (2002) - If the matrix of variables in time t, where t � (1, 2, 3, …, T) is signed for particular scenarios s, where s � (1, 2, …, S), say as zts, the problem becomes � � � �min ,F p x w zj jt x � ���� � � � t jt s ts 1 (4) subject to c x z Dj jt jt ts ts� ��� t s, , (5) � �x jt 0 1 2, , , � j t, , (6) zts � 0 t s, , (7) where w is the weighting factor and � is the function of nega- tive demand consequences related to the unmet demand zjt and probability �s in the range of scenario s. Demand Dts will be presented with an uncertainty com- ponent zjt, see Eq. (5). Finishing processes in construction production are an appropriate place for practic- ing JIT methods. Keywords: activities; construction; fig; production; time; total; � �
• MULTI-ROBOT MOTION PLANNING: A MODIFIED RECEDING HORIZON APPROACH FOR REACHING GOAL STATES by Mendes Filho, José M.; Lucet, Eric (2016) - This paper proposes the real-time implementation of an algorithm for collision-free motion planning based on a receding horizon approach, for the navigation of a team of mobile robots in the presence of obstacles of different shapes. Introduction The control of mobile robots is a long-standing subject of research in the robotics domain. Keywords: goal; horizon; motion; planning; problem; robot; time
• AD HOC TEAMWORK BEHAVIORS FOR INFLUENCING A FLOCK by Genter, Katie; Stone, Peter (2016) - Instead, we pair influencing agents that share some neighbors. 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; algorithm; behavior; flock; lookahead; neighbors; orientation; step; time
• Reliability Analysis of a Steel Frame by Sýkora, M. (2002) - The peak velocity pressure can be written as: � � � � � �q z c z c z vbp g r� 2 21 2 � (5) where cg(z) (9) � �M Bg g Bs BwS,y roof frame� � � �837 809 1327. . . Keywords: analysis; buckling; extremes; reliability; snow; time; wind; � �
• Modeling the Aerodynamics and Performances of a Historic Airplane: the Spanish by González-Betes, A.; Martínez-Val, R. (2003) - It is important to note that, as in other long distance flights, the fuel was a mixture of gasoline (80 %) and benzol (20 Vo), which provided the minimum specific fuel consumption and detonation free operation, which was crucial to avoid engine failures [5, 6]. l8 From the very beginning, because ofits excellent capabili- ties and flight qualities, this airpiane was used in some long distance attempts; for example the Madrid-Manila 18 stage flight in 1926 Keywords: aircraft; airplane; aviation; cuatro; drag; engine; flight; fuel; madrid; maximum; spanish; speed; time; xix
• GENERATION OF TRANSPORT PATHS IN FRACTURED POROUS MEDIA by Říha, Jakub; Královcová, Jiřina (2017) - In this article, a method for generation of transport paths in combined equivalent porous media / discrete fracture network computational meshes is proposed as an alternative to a particle tracking method. Keywords: transport paths; fractured porous media; Flow123D; particle tracking. Keywords: case; concentration; figure; test; test case; time; transport; transport path
• A Magnetic Resonance Measurement Technique for Rapidly Switched Gradient Magnetic Fields in a Magnetic Resonance Tomograph by Bartušek, K.; Gescheidtová, E. (2003) - Digitalised MR signal f(t) Instantaneous fiequency of MR signal O(t) Instantaneous phase of MR signal T2 Spin relaxation time TE Echo time - time of the spin echo creation 2 Introduction The quality of the gradient magnetic fields is an im- portant property of devices exploiting the phenomenon of magnetic resonance for imaging or localised spectroscopy. A comparison of the G, gradient time decay characterisrics obtained by the I[ IFSE, and IFSES methods is presented in Fig. Keywords: echo; field; gradient; magnetic; method; mr signal; pulse; signal; time
• NON-UNITARY TRANSFORMATION OF QUANTUM TIME-DEPENDENT NON-HERMITIAN SYSTEMS by Maamache, Mustapha (2017) - 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. We provide a new perspective on non-Hermitian evolution in quantum mechanics by emphasizing the same method as in the Hermitian quantum evolution. Keywords: equation; evolution; hamiltonian; hermitian; phys; quantum; time
• LAMBERT FUNCTION METHODs TO STUDY LASER DYNAMICS WITH TIME-DELAYED FEEDBACK by Joglekar, Yogesh N; Vemuri, Gautam; Wilkey, Andrew (2017) - 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. In this manuscript, we show that under some conditions, the rate equations model that is used to model semiconductor lasers with feedback can be analytically solved by using the Lambert W -function. Keywords: carrier; equations; field; inversion; lambert; laser; time
• Reducing Time for the Product Development Process by Evaluation in the Phase of Solution Searching by Jokele, B.; Fuchs, D. K. (2003) - Due to the fact that the problem occurs shortly be- fore or after product launch, a characteristic feature of 40 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 43 No. 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. Keywords: troubleshooting, change management, concurrent use of methods. - normal process preventive measures minor failings to acceptable customer 1 2 3 P ro du ct io n pr ep ar at io n C la rif yi ng th e ta sk C on ce pt ua l d es ig n E m bo di m en t d es ig n D et ai l d es ig n trouble shooting normal process preventive measures ro du ct la un ch P unfullfilled requirements, or failings time major failings 1 2 3 Fig. 1: Possible stages in product development process a troubleshooting situation is lack of time. Keywords: development; fig; process; product; time
• THE TIME DIFFERENCE IN EMISSION OF LIGHT AND PRESSURE PULSES FROM OSCILLATING BUBBLES by Vokurka, Karel (2018) - Intensity of oscillation of spark generated bubbles. Experimental study of light emission from spark generated bubbles. Keywords: bubble; difference; figure; light; pressure; pulses; radiation; rm1; spark; time; time difference
• LEAD-TIME, INVENTORY, AND SAFETY STOCK CALCULATION IN JOB-SHOP MANUFACTURING by Sellitto, Miguel Afonso (2018) - LT i – lead-time of order i; LTm – mean order LT ; LTσm – standard deviation of the order LT ; LTmw – 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; WIPm – mean WIP; Pm – mean throughput; ∆Tmax – maximum time elapsed between the arrival of two successive orders. The Throughput Diagram. in which: LT i – lead-time (LT ) of order i in the current work centre; TPE i – completion time of order i in the previous work centre (time of liberation); TPEU i – completion time of order i in the current work centre. n – number of orders. Keywords: control; days; inventory; lead; manufacturing; order; time
• The Psychological Image of Realistic Physical Quantities. The Psychological Speed of Aging by Végh, L. (2004) - 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; psa; quantities; time; � �
• Response of a Light Aircraft Under Gust Loads by Chudý, P. (2004) - 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. 6: Power spectral density of T at the wing root Type of response A (N�m) N0 (Hz) M1 0.502 20.23 M2 8.263 3.105 T 0.389 20.12 Table 3: Summary of the probability parameters at the wing root station Altitude 1000.0 m True Air Speed 44.0 m�s�1 Dynamic pressure 1076.06 Pa Mach number 0.1308 Gust Velocity, U0 15.0 m�s�1 Table 4: Flight conditions for discrete gust analysis These points were placed at the CG and at the wing root. Keywords: analysis; fig; gust; loads; response; time; wing; � �
• Genetic algorithms to determine the optimal parameters of an ensemble local mean decomposition by Silva, Willian T. F. D.; Borges, Filipe D. D. M. (2021) - 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: decomposition; figure; frequency; function; mean; method; mode; processing; product; results; signal; time
• ON THE SECOND LIGHT FLASH EMITTED FROM A SPARK-GENERATED BUBBLE OSCILLATING IN WATER by Vokurka, Karel (2020) - Generated bubbles can be described by two parameters. Experimental study of the thermal behavior of spark generated bubbles in water. Keywords: bubble; d12; figure; light; pressure; pulse; rm1; spark; time; u1(t
• ANALYTICAL SOLUTION OF (2+1) DIMENSIONAL DIRAC EQUATION IN TIME-DEPENDENT NONCOMMUTATIVE PHASE-SPACE by Haouam, Ilyas (2020) - Time profile of harmonic generation. 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. Keywords: dirac; doi:10.1103; equation; field; phase; physical; quantum; review; space; time; |φ(λ
• NUMERICAL SIMULATION OF A SINGLE RING INFILTRATION EXPERIMENT WITH hp-ADAPTIVE SPACE-TIME DISCONTINUOUS GALERKIN METHOD by Dolejší, Vít; Kuráž, Michal; Solin, Pavel (2021) - The stopping criteria and the choice of the time step are controlled in such a way that the errors arising due to the space discretization, time discretization, and iterative solution of nonlinear algebraic systems are balanced. < tr = T we split the time interval I into sub-intervals intervals Im = (tm−1, tm], m = 1, . . . Keywords: boundary; experiment; method; numerical; space; time
• TNL: NUMERICAL LIBRARY FOR MODERN PARALLEL ARCHITECTURES by Oberhuber, Tomáš; Klinkovský, Jakub; Fučík, Radek (2021) - Nonlin- ear system solvers, eigenvalues computations or ODE system solvers are slightly less common compared to linear systems solvers, nevertheless these algorithms belong to the core of HPC as well. As we mentioned before, efficient precondition- ers for linear systems solvers are extremely important. Keywords: cores; cpu; eff; gpu; memory; numerical; parallel; solver; speed; time; tnl
• NUMERICAL SOLUTION OF FLUID-STRUCTURE INTERACTION PROBLEMS WITH CONSIDERING OF CONTACTS by Sváček, Petr (2021) - Dt |tn+1 ≈ (15) 1 JAn+1 3JAn+1u n+1 − 4JAn un + JAn−1u n−1 2∆t or more precisely the time derivative term from (11) is approximated by d dt (∫ Ωt ρu · zdx ) |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 ) Thus, the time discretized weak formulation reads: Find U = (u, p) : Keywords: boundary; domain; flow; matrix; problem; solution; time; velocity
• Detailed modelling and analysis of digital mho distance relay with single-pole operation by Pinheiro, Paulo Henrique Barbosa de Souza; Santos, Mayara Helena Moreira Nogueira; Colombini, Angelo Cesar; França, Bruno Wanderley; Fortes, Marcio Zamboti (2021) - 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: detection; distance; distance relay; fault; figure; impedance; line; mho; phase; power; protection; relay; time; zone
• Scalable Normal Basis Arithmetic Unit for Elliptic Curve Cryptography by Schmidt, J.; Novotný, M. (2005) - i m i m� � � � �� �, , , ,0 1 2 1� (2) 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 . (3) We can reduce the number of clock cycles CPADD in two ways: by reducing the number of clock cycles CMUL of the multiplications and the number of clock cycles CSQR of the iterative squaring.0 Both the Massey-Omura and the AMOV multipliers need m clock cycles for computing all m bits of the result. Keywords: clock; cycles; multiplier; time; � �
• Simulation in Quality Management – An Approach to Improve Inspection Planning by Crostack, H.-A.; Höfling, M.; Liangsiri, J. (2005) - [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: cost; inspection; inspection strategies; process; product; quality; simulation; strategies; time
• Time-dependent step-like potential with a freezable bound state in the continuum by Gutiérrez Altamirano, Izamar; Contreras-Astorga, Alonso; Raya Montaño , Alfredo (2022) - = y at t = 0. but before we had A = 0, one can still have a Schrödinger equation without vector potential by tuning appropriately the scalar potential. Keywords: continuum; equation; potential; state; time
• Time-dependent mass oscillators: constants of motion and semiclasical states by Zelaya, Kevin (2022) - The parameters have been fixed as a = c = w0 = 1, w1 = 2, µ0 = 0.3, and κ = 0.5. to the point that, for times t > 4 is almost indistin- guishable. In the latter, it can be verified that the width of the wavepackets oscillates in a bounded way for times t > 2. Partic- ularly, for the coherent state case of Figure 4c, the dynamics of the wavepacket can be identified clearly, where the maximum point follows the corresponding classical trajectory (dashed-black). Keywords: caldirola; equation; kanai; mass; motion; oscillator; quantum; solutions; states; time
• Conserved quantities in non-hermitian systems via vectorization method by Agarwal, Kaustubh S.; Muldoon, Jacob; Joglekar, Yogesh N. (2022) - 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. 1/2022 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; hamiltonian; operators; physical; physics; quantum; symmetry; systems; time; ℜλt
• Time-Mean Helicity Distribution in Turbulent Swirling Jets by Tesař, V. (2005) - 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. In practical flowfield studies, the variable of interest is the local quantity, helicity density � (m/s2) as defined in Fig. Keywords: czech; exit; fig; flow; helicity; jet; nozzle; profiles; swirl; time; velocity; vol; � �
• The engineering performance of eco-friendly concretes containing diatomite fly ash and ground granulated blast furnace slag by Aruntaş, Hüseyin Yilmaz; Yildiz, Erkan; Kaplan, Gökhan (2022) - Investigation into the long-term in-situ performance of high fly ash content concrete used for structural applications. Study on preparation of ultra-high strength and high performance concrete from diatomite and its mechanical properties. Keywords: abrasion; ash; cement; compressive; concrete; diatomite; figure; fly; ggbfs; high; materials; mixtures; properties; ratio; replacement; scm; scms; setting; standard; strength; time; water
• Exact solutions for time-dependent complex symmetric potential well by Khantoul, Boubakeur; Bounames, Abdelhafid (2023) - In 2002, A. Mostafazadeh presented a more extended version of non-Hermitian Hamiltonians having a real spectrum, proving that the hermiticity of the Hamilto- nian with respect to a positive definite inner product, ⟨., .⟩η Real spectra in non-Hermitian Hamiltonians having PT symmetry. Keywords: equation; hermitian; invariant; non; pseudo; time
• A Reservation Aggregation Framework Design for Demand Estimation by Vítek, T.; Pachner, D. (2006) - The past indi- ces induce the following occupation and price aggregations for all elements of the ordered set Rp � � �� �r r R r ri � � � , (8) � �R r R r Keywords: data; r r; reservations; time; � r; � �
• Effect of the Hydraulic Characteristics of a Stream Channel and its Surroundings on the Runoff Hydrograph by Matoušek, V. (2008) - Thus, the two hydrographs that should be compared with each other are the hydrograph caused by rainfall of 20 mm and 30 min for the existing channel (Fig. 12) and the hydro- graph caused by rainfall of 25 mm and 60 min for the pro- posed natural channel (Fig. 13). The downhill directed drills created small natural channels that drained the field during the rainfall event and increased the direct runoff and its velocity. Keywords: channel; flood; flow; rainfall; runoff; time; water; watershed; � �
• Application of the Source-Jerk method using a neutron generator in a subcritical reactor by Rataj, Jan; Mátl, Jakub; Suk, Pavel (2023) - The model with AmBe neutron source is visualised in the YZ direction in Figure 15. The time step was set to 1 s and 0.1 s. Both the D-D generator and the AmBe source were used as neutron sources. Keywords: det; detectors; generator; method; neutron; reactivity; reactor; source; time
• Dynamic Simulations in Cost and Time Estimation of the Construction Process by Beran, V.; Hromada, E. (2008) - The results of particular simulations P P( ; ) ( ( ; ))T C sim T C� TABproject (2a) for the example described below are T��45; 89� and C��2411;3131�. The results present a useful risk evaluation for projects or project activities. Keywords: activities; construction; project; time; � �
• Extending the Life Time of a Nuclear Power Plant: Impact on Nuclear Liabilities in the Czech Republic by Havlíček, L. (2007) - Unlike the disposal and decommissioning liability there is no obvious relation between NPP life time (waste volume produced) and liability. 4: Cumulative storage costs (cash-flow view) for the evaluated model NPP life time options 0 200 400 2 0 0 6 2 0 1 0 2 0 1 4 2 0 1 8 2 0 2 2 2 0 2 6 2 0 3 0 2 0 3 4 2 0 3 8 2 0 4 2 2 0 4 6 2 0 5 0 2 0 5 4 2 0 5 8 2 0 6 2 2 0 6 6 2 0 7 0 2 0 7 4 2 0 7 8 2 0 8 2 m il. C Z K basic option alternative 1 alternative 2 Fig. Keywords: liability; life; npp; operator; storage; time
• Transfer of master clock network technology to Czechoslovakia: Elektročas or Elektrozeit? German roots of Czechoslovak post-war timepieces 1923–1990 by Hamr, David (2024) - The American company IBM, an important global producer of master clock systems in the first half of 20th century, established its branch in Žitná Street in Prague and supplied clock networks to many adminis- trative buildings in particular, and was also successful in transport industry (railways). Keywords: History of technology, Czechoslovakia, technological transfer, timepieces industry, 20th cen- tury, centrally controlled economy, uniform time, master clock, master clock network technology, modernity. Keywords: century; clock; company; czech; elektročas; german; master; networks; production; systems; technology; time; war
• Emanuel Šlechta, engineer and entrepreneur in the First Republic of Czechoslovakia by Sedláček, Jiří; Efmertová, Marcela (2024) - Keywords: History of science and technology, Czechoslovakia, Emanuel Šlechta, Stanislav Špaček, minister of technology after 1948, Czech Technical University in Prague, World War II, 1922–1938. Already at the beginning of his professional career, Emanuel Šlechta had a chance to become a leader of his generation and to become a leader of the technical elite of the time, thanks to his excellent technical en- gineering education at the Czech Technical University in Prague and his many years of practical experience in the USA. Keywords: american; czech; czech technical; czechoslovak; emanuel; emanuel šlechta; engineering; industrial; international; management; national; organisation; prague; praha; production; stanislav; technical; time; university; usa; war; work; šlechta; špaček
• Visualization and Simulation in Scheduling by Čapek, R. (2008) - 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: function; matlab; scheduling; simulation; time; visualization
• Gamma-ray bursts and optical brightness: insights from Swift satellite by Racz, Istvan I.; Nehme, Yasmin; Balazs, Lajos G. (2025) - Survival function of GRBs We used the optical V magnitudes of Swift GRB obser- vations, representing a sufficiently large homogeneous dataset sample, for a survival analysis in R program- ming language with “survival” packages [60, 62]. This semi-parametric nature of the model makes it a robust tool for handling various types of survival data. Keywords: analysis; astronomy; bagoly; bursts; data; distribution; function; gamma; grbs; ray; ray bursts; survival; swift; time
• Dynamics of the Flow Pattern in a Baffled Mixing Vessel with an Axial Impeller by Brůha, O.; Brůha, T.; Fořt, I.; Jahoda, M. (2007) - 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. kg s�1 (� � 1 kg l�1). Keywords: circulation; energy; fig; flow; impeller; loop; pcl; time; vol; � �
• Preface to the Special Issue of Acta Polytechnica “History of science and technology” by Efmertová, Marcela (2024) - An example is the use of time in political decisions during the French Revolution, where a specific calendar based on the decimalization of republican time was created. Time also needed to be considered later in the organization and institutionalization of Czechoslovak military authorities between the wars (article by D. Kyselka). Keywords: article; technical; time

• Improving the production process of silicon nanoparticle and quartz microlens by J. Mahmoud, Muaath; G. Rasheed, Bassam; M. Hanon, Muammel (2025) - The input parameters were laser power, laser speed, and the number of repeated processes. Effects of laser power, laser speed, and No. of repeated processes on the lens diameter, lens depth, focal point, F #, and NA as determined by the DOE software. Keywords: energy; figure; laser; nanoparticles; output; parameters; power; process; processes; quartz; silicon; software; surface
• Technical and Economic Assessment of Storage Technologies for Power-Supply Grids by Meiwes, H. (2009) - A comprehensive overview of storage technologies as well as possible applications and business cases for storage systems is presented. 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. Keywords: applications; batteries; battery; caes; costs; efficiency; energy; grid; power; range; storage; systems; technologies; technology
• Importance of Peaceful Utilization of Nuclear Energy by Frydryšková, J. (2009) - These events also influenced the establishment of research on nuclear energy in Czechoslovakia, and 1955 was the year when the USSR, motivated by political and power aims, offered to provide scientific and technical support for a scien- tific institute for nuclear research to design reconstruction a nuclear reactor. The IAEA was created in response to the deep fears and great expectations resulting from the discovery of nuclear energy, fears and expectations that have changed profoundly since 1945 and continue to fluctuate. Keywords: adobe; bomb; energy; institute; new; nuclear; prague; research; soviet
• Active Detectors for Plasma Soft X-Ray Detection at PALS by Granja, C.; Linhart, V.; Platkevič, M.; Jakůbek, J.; Krouský, E.; Pospíšil, S.; Renner, O.; Slavíček, T. (2010) - 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: detector; energy; figure; laser; physics; plasma; prague; radiation; shield; target
• Treatment of Biogas for Use as Energy by Koller, J. (2010) - 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: biogas; energy; fermentation; heat; plant; production; substrates
• A Comparison of Distillery Stillage Disposal Methods by Sajbrt, V.; Rosol, M.; Ditl, P. (2010) - No. 2/2010 Table 3: All operating costs of the fertilizing process line Total cost – electric energy for centrifuge: 60 EUR/day 3.9 % Total cost – gas for evaporation: 1 120 EUR/day 73.2 % Total transport costs on the fields: 70 EUR/day 4.6 % Total neutralization costs: 170 EUR/day 11.1 % Total costs for pre-treatment of condensate from evaporation: 110 EUR/day 7.2 % TOTAL OPERATING COSTS: 1 530 EUR/day 100.0 % 13 EUR/m3 duce biogas and digestate). • 1 kg of Ca(OH)2 for stillage neutralization costs 3.80 CZK (0.15 �). Keywords: costs; day; energy; eur; method; operating; production; stillage; total
• Barriers to Energy Efficiency – Focus on Transaction Costs by Valentová, M. (2010) - 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: barriers; costs; efficiency; energy; energy efficiency; information; level; policy; transaction; transaction costs; vol
• Voice Activity Detection for Speech Enhancement Applications by Verteletskaya, E.; Sakhnov, K. (2010) - 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: algorithm; detection; energy; noise; signal; speech; vad; voice
• Cosmology with Gamma-Ray Bursts Using k-correction by Kovács, A.; Bagoly, Z.; Balázs, L. G.; Horváth, I.; Veres, P. (2011) - 1 Introduction Several papers present how to make k-corrections (e.g. [1]). The motivation of k-correction is related to the fact that the energy distribution measured with gamma-ray detectors placed on satellites is not equal to the energy that the burst released in its comoving system. Keywords: amati; energy; vol
• 4U 1909+07: a Hidden Pearl by Kreykenbohm, I.; Fürst, F.; Barrágan, L.; Wilms, J.; Rothschild, R. E.; Suchy, S.; Pottschmidt, K. (2011) - To obtain the pulse profile at high energies between 20 keV and 40 keV, we used INTEGRAL data taken in 2004. Neither the photoelectric absorption nor the power law index Γ varies with pulse phase. Keywords: data; energy; integral; kev; period; phase; pulse
• Exceptional Points for Nonlinear Schroedinger Equations Describing Bose-Einstein Condensates of Ultracold Atomic Gases by Wunner, G.; Cartarius, H.; Koeberle, P.; Main, J.; Rau, S. (2011) - Typically, in these condensates the exceptional points are also found to be bifurcation points in parameter space. It can appear, e.g., for resonances in open systems, with complex energy eigenvalues. Keywords: bifurcation; condensates; energy; equation; field; interaction; scattering
• Production of Biodiesel from Vegetable Oil Using Microware Irradiation by Kapilan, N. (2012) - The fuel property analysis shows that the properties of jatropha oil biodiesel satisfy the biodiesel standards, and are close to the fossil diesel standards. No. 1/2012 [19] Jain, S., Sharma, M. P.: Biodiesel pro- duction from Jatropha curcas oil, Renewable and Sustainable Energy Reviews, 14, 9, 2010, 3 140–3 147. Keywords: biodiesel; energy; fuel; irradiation; jatropha; microwave; oil; production; transesterification
• Plasma Surface Treatment of Powder Materials — Process and Application by Pavlatová, Monika; Horáková, Marta; Hladík, Jan; Špatenka, Petr (2012) - [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. We also partic- ipate in and support research in other applications of plasma surface treatment. Keywords: energy; figure; material; plasma; powder; surface; treatment
• Energy Accumulation by Hydrogen Technologies by Čermáková, Jiřina; Doucek, Aleš; Polák, Lukáš (2012) - The aim of this paper is to introduce hydrogen as a tool for regulating photovoltaic energy in island mode. Hydrogen as an energy car- rier enables photovoltaic energy produced in times of excess power in the grid to be stored, and then supplied to the grid when it is required, i.e., during peak periods in the daily load curve [2]. Keywords: energy; hydrogen; photovoltaic; power
• Energy Estimation of Distributed Phase-shift Beamforming by Černý, Viktor (2012) - The steps required for 1-packet two-way communi- cation between modules A1 and B1 are: 1. module A1 broadcasts data in cluster A on fre- quency fd, Fig. 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. Keywords: cluster; data; energy; fig; modules; phase
• Energetic Approach to Large Strain Gradient Crystal Plasticity by Kratochvíl, Jan; Kružík, Martin (2012) - [13] Giacomini, A., Lusardi L.: Quasistatic evolution for a model in strain gradient plasticity, SIAM J. Math. ∈ ∂δ(ż(t)), z(0) = z0, z ∈ Z, (8) where z0 ∈ Z is an initial condition for the internal variable. Keywords: energy; plasticity; z(t
• Micromechanical Analysis of Cement Paste with Carbon Nanotubes by Šmilauer, Vít; Hlaváček, Petr; Padevět, Pavel (2012) - 6/2012 CNT length w/c Compressive s. (MPa) Flexural s. (MPa) Ref. (µm) Plain CNT Plain CNT < 10 P 0.30 38.3± 8.2 61.8± 0.8 2.3± 0.4 2.3± 0.2 [2] < 30 P 0.30 — — 9.2 12.6 [4] < ∼10 M 0.40 28.9 54.3 6.0 8.23 [8] < 500 P 0.45 52.3± 0.7 62.1± 1.4 6.7 ± 0.1 8.4± 0.2 [5] < 100 P 0.50 — — 5.5 7.2 [9] < ∼5 P — 49 56 16 8 [12] Table 1: Summary of published data on strength gain when CNT is added to cement. There are controversial results for cement paste with admixed CNT up to 500µm in length. Keywords: cement; cnt; energy; fracture; paste; strength
• The Asymptotic Properties of Turbulent Solutions to the Navier-Stokes Equations by Skalák, Zdenek (2012) - [6] Kato, T.: Strong Lp− solutions of the Navier- Stokes equations in Rm, with applications to weak solutions, Math. [9] Miyakawa, T., Schonbek, M.: On optimal decay rates for weak solutions to the Navier-Stokes equations in Rn, Math. Keywords: energy; equations; solutions; stokes
• Astroparticle Physics Today by Giovannelli, Franco (2013) - 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. The emitted spectra of jets from cosmic sources of different nature are strongly dependent on the angle formed by the beam axis and the line of sight, and obviously by the Lorentz factor of the particles (e.g. Bednarek et al., 1990 and the references therein; Beall, Guillory & Rose, 1999, 2009; Beall, 2002, 2003, 2008, 2009; Beall et al., 2006, 2007). Keywords: astrophysics; eds; energy; et al; frontier; giovannelli; graziati; objects; particle; physics; ray; rays; sabau; sources; universe
• Study of Silicon Photomultipliers for the GRIPS Calorimeter Module by Ulyanov, Alexei; Hanlon, Lorraine; McBreen, Sheila; Foley, Suzanne (2013) - 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 < E < 1.5 MeV. Keywords: calorimeter; energy; grips; grm; ray; resolution; sensitivity
• Development of the PETAL Laser Facility and its Diagnostic Tools by Batani, Dimitri; Hulin, Sebastien; Ducret, Jean Eric; d’Humieres, Emmanuel; Tikhonchuk et al., Vladimir (2013) - PETAL laser system The PETAL system, under construction on the LMJ site, has the ultimate goal to reach 7PW (3.5 kJ with 0.5 ps pulses). After a detailed char- acterization of particle emission from PETAL targets, the diagnostics will be used for plasma experiments. Keywords: diagnostics; electron; energy; experiments; facility; ignition; interaction; laser; lmj; petal; physics; plasma; proton; target
• The Formation of a Power Multi-Pulse Extreme Ultraviolet Radiation in the Pulse Plasma Diode of Low Pressure by Borgun, Ievgeniia V.; Azarenkov, Mykola O.; Hassanein, Ahmed; Tseluyko, Oleksandr F.; Maslov, Vasyl I.; Ryabchikovk, Dmitro L. (2013) - 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; current; discharge; energy; plasma; radiation; range; wavelength
• Thomson Parabola Spectrometer for Energetic Ions Emitted from Sub-ns Laser Generated Plasmas by Cutroneo, Mariapompea; Torrisi, Lorenzo; Ando’, Lucio; Cavallaro, Salvatore; Ullschmied, Jiri; Krasa, Josef; Margarone, Daniele; Velyhan, Andreji; Pfeifer, Miroslav (2013) - 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: charge; energy; ion; ions; laser; plasma; state
• Proton- and -radiation of the Micro-Pinch with the Boron-Containing Target by Gurin, Anatolii A.; Adamenko, Andrii S.; Adamenko, Stanislav V.; Kuzmenko, Mykola M. (2013) - (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 5mm aperture at the en- trance into magnet). In 5% of the shots, the presence of α-particles of energy up to 2MeV in the flux of fast ions is discovered by means of Thomson analyser equipped with track detectors. Keywords: energy; ions; micro; particles; plasma; protons; spot; target; tracks
• Nuclear Fusion Effects Induced in Intense Laser-Generated Plasmas by Torrisi, Lorenzo; Cavallaro, Salvatore; Cutroneo, Mariapompea; Krasa, Josef (2013) - Deuterium ions at kinetic energies above 4MeV 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: deuterium; d−d; energy; fusion; ions; laser; plasma; target
• WHAT IS NEW IN ASTROPARTICLE PHYSICS by Giovannelli, Franco (2013) - [10] Albert, J. et al. [59] Dunkley, J. et al.: 2009, ApJ 701, 1804 Keywords: apj; astrophysics; eds; energy; et al; giovannelli; graziati; high; mass; matter; particle; physics; ray; rays; sabau; sources; stars; universe
• THE 2H(α, γ)6LI REACTION AT LUNA AND BIG BANG NUCLEOSYNTHETIS by Gustavino, Carlo (2013) - Keywords: LUNA experiment, nuclear astrophysics, Big Bang nucleosynthesis, 6Li abundance, 2H(α, γ)6Li reaction. Experimental set-up Figure 5 shows the experimental set-up used for the 2H(α, γ)6Li reaction. Keywords: 6li; beam; energy; kev; reaction
• SEARCH FOR DARK MATTER WITH GAMMA-RAYS: A REVIEW by Morselli, Aldo (2013) - [Fermi Coll.] [Fermi Coll.], Astroparticle Physics 35 (2012) 346–353 [arXiv:1108.0201] Keywords: coll; energy; fermi; gamma; lat; matter; ray
• DARK ENERGY AND KEY PHYSICAL PARAMETERS OF CLUSTERS OF GALAXIES by Bisnovatyi-Kogan, Gennady S.; Chernin, Artur; Merafina, Marco (2013) - Keywords: dark energy, equilibrium models, galaxy clusters. M = (0.6 ÷ 1.2) × 1015M� [4], one finds the zero-gravity radius of the Virgo cluster: RΛ = (9÷ 11)Mpc ' 10Mpc. Keywords: cluster; dark; density; energy
• DAMA RESULTS: DARK MATTER IN THE GALACTIC HALO by 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. (2013) - [22] See in: http://people.roma2.infn.it/dama [23] P. Belli et al.: 1996, Astropart. B 436, 379; P. Belli et al.: 1999, Phys. Keywords: bernabei; dama; energy; et al; modulation; phys
• ARGO-YBJ: STATUS AND HIGHLIGHTS by Di Sciascio, Giuseppe (2013) - ARGO-YBJ is confronting various open problems in Cosmic Ray (CR) physics. Energy spectrum of MGRO J2031+41/TeV J2032+4130 as measured by ARGO-YBJ (magenta solid line). Keywords: argo; energy; flux; ray; tev; ybj
• MODELING JET INTERACTIONS WITH THE AMBIENT MEDIUM by Beall, J. H.; Guillory, J.; Rose, D. V.; Wolff, Michael T. (2013) - 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: beall; code; energy; jet; jets; medium; plasma; simulations
• INVESTIGATING THE Ep, i –Eiso CORRELATION by Amati, Lorenzo; Dichiara, Simone (2013) - Fermi GRBs are marked with red (GBM detection) and blue (GBM + LAT detec- tion) color. Finally, based on time-resolved analysis of BATSE, BeppoSAX and Fermi GRBs, it was found that the Ep,i –Liso correlation holds also within a good fraction of GRBs [20], which is robust evidence for a physical origin, also providing clues to its explanation. Keywords: correlation; eiso; eiso correlation; energy; fermi; grbs; redshift
• ULTRAHIGH ENERGY COSMIC RAYS: REVIEW OF THE CURRENT SITUATION by Stanev, Todor (2013) - Keywords: high energy cosmic rays, hadronic interaction at very high energy, origin of the highest energy cosmic rays. 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; energy; events; hires; telescope
• THE MASS COMPOSITION OF ULTRA HIGH ENERGY COSMIC RAYS by Grillo, Aurelio F. (2013) - [ g /c m m a x < X 650 700 750 800 850 1407 1251 998 781 619 457 331 230 188 143 186 106 47 EPOSv1.99 p Fe QGSJET01 p Fe SIBYLL2.1 p Fe QGSJETII p Fe EPOSv1.99 p Fe QGSJET01 p Fe SIBYLL2.1 p Fe QGSJETII p Fe Figure 3. Xmax (upper panel) and RMS(Xmax) com- pared with predicted values for pure compositions in different interaction models. Consequently they pro- vide different expectations for 〈Xmax〉 and σ(Xmax). Keywords: auger; composition; data; energy; mass; xmax
• COMPUTATIONAL SCHEMES FOR THE PROPAGATION OF ULTRA HIGH ENERGY COSMIC RAYS by Aloisio, Roberto (2013) - 2. 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: disintegration; energy; kinetic; nuclei; photo; process
• INFLUENCE OF THE RESULTS OF UHECR DETECTION ON THE LHC EXPERIMENTS by Petrukhin, Anatoly A. (2013) - The cosmic ray energy region 1015 ÷ 1017 eV corresponds to LHC energies 1 ÷ 14TeV 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: eas; energy; experiments; lhc; muons; nuclei; production
• PRECISE COSMIC RAYS MEASUREMENTS WITH PAMELA by 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. (2013) - PAMELA data cover the largest energy range ever achieved, with no atmospheric overburden. 2.2.1. 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]. Keywords: cosmic; data; energy; et al; italy; pamela; results
• RADIOACTIVE UHECR ASTRONOMY: CORRELATING GAMMA ANISOTROPY AND NEUTRINO PEV EVENTS by Fargion, Daniele (2013) - Their connection to UHECR radioactive decay and scattering in flight is a possibility to be tested in future Cosmic ray anisotropy and UHECR maps. The recent absence of narrow angle clustering in UHECR maps, as it should be expected for protons, the missing of events along the nearest Cluster Virgo, the wide spread (nearly 16° angle) of UHECR along CenA are in disagreement with the first proton–UHECR AUGER understanding. Keywords: anisotropy; auger; cena; energy; events; gamma; gzk; neutrino; nuclei; tev; uhecr
• DO WE SEE THE ‘IRON PEAK’? by Erlykin, Anatoly D.; Wolfendale, Arnold W. (2013) - [3] Apel W.D. et al., 2009, Astropart. Cosm.Ray Conf., Beijing, 1, 209 [5] Berezhnev S.F.et al., 2011b, 32nd Int. Keywords: energy; knee; mass; source; spectrum
• DETECTION OF A CHANGE OF SLOPE IN THE SPECTRUM OF HEAVY MASS COSMIC RAYS PRIMARIES BY THE KASCADE-GRANDE EXPERIMENT by 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. (2013) - 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° < θ < 40°. Keywords: cic; energy; experiment; grande; heavy; kascade; knee; spectrum
• RESULTS FROM LHCF EXPERIMENT by Tricomi, Alessia (2013) - Single photon energy spectra measured by LHCf (black dots) in η > 10.94 (left) and 8.81 < η < 8.99 (right) bin, respectively, for 7TeV (top panel) and η > 10.15 (left) and 8.77 < η < 9.46 (right) bin, respectively, for 900GeV (bottom panel) p–p collisions. Impact of LHCf results on HECR Physics The first LHCf results have attracted attention in the HECR community. Keywords: data; energy; lhcf; models; spectra
• RECENT DEVELOPMENTS IN ULTRA-HIGH ENERGY NEUTRINO ASTRONOMY by Grieder, Peter K. F. (2013) - Moreover, huge thick homogeneous surface layers or bodies of suitable target material, such as the Antarc- tic ice shelf or the giant Greenland ice cap, can be surveyed with balloon (ANITA, Gorham et al. 53 supplement/2013 Recent Developments in Ultra-High Energy Neutrino Astronomy [49] Münch, K. et al.: 2005, Proc. ICRC 5, Keywords: cherenkov; energy; et al; ice; neutrino; proc; uhe
• ICECUBE OBSERVATORY: NEUTRINOS AND THE ORIGIN OF COSMIC RAYS by Desiati, Paolo (2013) - IceTop, using events in coincidence with the deep IceCube array, provides the measurement of the spec- trum and mass composition of cosmic rays at the knee and up to about 1018 eV. The DeepCore sub-array, consisting of 6 densely instrumented strings located at the bottom-center of IceCube, lowers the obser- vatory neutrino energy threshold to about 10GeV. DeepCore uses the surrounding IceCube instrumented volume as a veto for the background of cosmic ray induced through-going muon bundles, thus enhancing the detection of down-going neutrinos within the Deep Core volume. Keywords: neutrinos, cosmic rays, anisotropy. Keywords: cosmic; energy; et al; high; icecube; neutrinos; phys; rays; sources
• THE GERDA EXPERIMENT: STATUS AND FUTURE PLANS by Zavarise, Paolo (2013) - Keywords: neutrinoless double beta decay, Majorana neutrino, low background experiment, germa- nium 76. Full energy spectrum of enriched detectors. Keywords: background; decay; detectors; energy; experiment; gerda; mass
• NEUTRINOLESS DOUBLE BETA DECAY: AN EXTREME CHALLENGE by Ferroni, Fernando (2013) - 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: background; decay; energy; mass; neutrino
• THE JEM-EUSO MISSION by Bertaina, Mario; Ebisuzaki, Toshikazu; Galeotti, Piero; Kajino, Fumiyoshi (2013) - 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 > 50EeV) cosmic rays (EECRs) and neutrinos [1– 5]; it looks downward from the International Space Station (ISS). In 2006, Japanese and U.S. teams redefined the mission as an observatory attached to KIBO, the Japanese Experiment Module (JEM) of ISS. Keywords: energy; euso; jem; mission
• CURRENT WAYS TO HARVEST ENERGY USING A COMPUTER MOUSE by Horvat, Frantisek; Cekan, Michal; Soltes, Lukas; Biath, Peter; Hucko, Branislav; Jedinak, Igor (2014) - Possible energy harvesting systems, PVF2 – piezomaterial, LT – circuit required for EH, C – ca- pacitor, B – battery, S – input to mouse system. in an open cavity of the mouse body, as is also shown in Figure 4. 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: circuit; energy; mouse; piezomaterial
• TECHNICAL AND ECONOMIC OPTIMIZATION OF COGENERATION TECHNOLOGY USING COMBUSTION AND GASIFICATION by Lisý, Martin; Baláš, Marek; Špiláček, Michal; Skála, Zdenek (2014) - 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: air; efficiency; energy; flue; flue gas; gas; heat; solutions; technology
• Some Problems of the Integration of Heat Pump Technology into a System of Combined Heat and Electricity Production by Böszörményi, G.; Böszörményi, L. (2001) - 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: energy; heat; heating; pump; stage; steam
• Comparison Between Atmospheric Turbidity Coefficients of Desert and Temperate Climates by Elminir, Hamdy K.; Rahuma, U. A.; Benda, V. (2001) - The beam transmittance may be expected to follow a Bougurer’s Law dependence on atmospheric extinction and air mass, such that: � �� �b � � �exp m . TL Prague (9) The relation of Equation (9) is similar to the model reported for Avignon, France: � � � �0103 0052. . Keywords: air; atmosphere; czech; data; energy; factor; helwan; radiation; turbidity; values; vol; � �
• ON OBSERVATIONAL PHENOMENA RELATED TO KERR SUPERSPINARS by Stuchlik, Zdenek; Schee, Jan (2014) - 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, Ultra-high energy collisions in the superspinning kerr geometry. Keywords: energy; keplerian; kerr; superspinars
• EFFECTIVE FRACTURE ENERGY OF ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE UNDER INCREASED STRAIN RATES by Sovják, Radoslav; Rašínová, Jana; Máca, Petr (2014) - This is because when there is a higher fibre volume fraction the maximum pull- out capacity on each individual fibre is reduced; its sensitivity to higher strain rates is therefore also reduced. It is therefore highly desirable to extend the scope of our study presented here, and to verify the effective fracture energy of fibre-reinforced cementitious composites under higher strain rates above 10−2 s−1. Keywords: energy; fibre; figure; fracture; rates; strain; uhpfrc
• POLYMERS CONTAINING Cu NANOPARTICLES IRRADIATED BY LASER TO ENHANCE THE ION ACCELERATION by Cutroneo, Mariapompea; Torrisi, Lorenzo; Mackova, Anna; Velyhan, Andriy (2015) - 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. Such a thin film produces high laser absorption due to the presence of the metal which absorbs the IR laser radiation and also due to the Cu nanoparticles in which surface plasmon resonant absorption effects are induced by the laser electromagnetic wave Keywords: energy; laser; mylar; plasma; target; thickness
• HYDROGENATED TARGETS FOR HIGH ENERGY PROTON GENERATION FROM LASER IRRADIATING IN TNSA REGIME by Torrisi, Lorenzo; Cutroneo, Mariapompea; Ullschmied, Jiri (2015) - 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 Higher ion acceleration is therefore expected, as reported in Fig. Keywords: acceleration; energy; ions; laser; plasma; proton
• PROTON STOPPING POWER OF DIFFERENT DENSITY PROFILE PLASMAS by Casas, David; Barriga-Carrasco, Manuel D.; Andreev, Alexander A.; Schnürer, Matthias; Morales, Roberto (2015) - Free Electron Stopping Stopping power of free plasma electrons can be cal- culated using a RPA dielectric function (DF). Finally, electronic stopping of free plasma electrons will be calculated in the dielectric formalism as Spf (v) = 2Z2 πv2 ∫ ∞ 0 dk k ∫ kv 0 Keywords: beam; density; energy; function; loss; plasma; power; proton; stopping
• HIGH-TEMPERATURE GASIFICATION OF RDF WASTE AND MELTING OF FLY ASH OBTAINED FROM THE INCINERATION OF MUNICIPAL WASTE by Lázár, Marián; Čarnogurská, Mária; Lengyelová, Marta; Korba, Ján (2015) - Acta Polytechnica doi:10.14311/AP.2015.55.0001 Acta Polytechnica 55(1):1–6, 2015 © Czech Technical University in Prague, 2015 available online at http://ojs.cvut.cz/ojs/index.php/ap HIGH-TEMPERATURE GASIFICATION OF RDF WASTES AND MELTING OF FLY ASH OBTAINED FROM THE INCINERATION OF MUNICIPAL WASTES Marián Lázár, Mária Čarnogurská∗, Marta Lengyelová, Ján Korba Faculty of Mechanical Engineering, Technical University of Košice, Department of Power Engineering, Vysokoškolská 4, 042 00 3. Raw materials used for gasification and the properties of the gas For the purposes of the experimental tests on plasma processing of RDF wastes, we used a sample that was obtained by separating the combustible components of municipal wastes (Fig. 2). Keywords: ash; energy; fly; gasification; plasma; process; rdf; wastes
• A Geothermal Energy Supported Gas-steam Cogeneration Unit as a Possible Replacement for the Old Part of a Municipal CHP Plant (TEKO) by Böszörményi, L.; Böszörményi, G. (2001) - 3 Feasibility of utilizing geothermal heat directly in the district heating network (DHN) 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. The main reason for this low efficiency is the conflict between geothermal heat and heat produced in cogeneration, which means that the heat produced by the cogeneration unit would be replaced by geothermal heat. Keywords: cycle; energy; gas; heat; power; steam; water
• MECHANICAL DISINTEGRATION OF WHEAT STRAW BY ROLLER-PLATE GRIND SYSTEM WITH SHARP-EDGED SEGMENTS by Kratky, Lukas; Jirout, Tomáš (2015) - [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: biogas; biomass; disintegration; energy; kwh; mill; particle; production; size; straw; t−1; wheat
• INTEGRAL METHODS FOR DESCRIBING PULSATILE FLOW by Hromadka, David; Chlup, Hynek; Žitný, Rudolf (2016) - 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: energy; equations; flow; method; momentum; solution; velocity
• EFFECT OF FIBRE ASPECT RATIO AND FIBRE VOLUME FRACTION ON THE EFFECTIVE FRACTURE ENERGY OF ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE by Sovják, Radoslav; Máca, Petr; Imlauf, Tomáš (2016) - [15] and Sovják et al. This paper investigates the effective fracture energy of UHPFRC with various fibre volume fractions and various fibre aspect ratios. Keywords: aspect; concrete; energy; fibre; fracture; uhpfrc; volume
• RESPONSE OF HIGH-PERFORMANCE FIBRE REINFORCED CONCRETE REINFORCED BY TEXTILE REINFORCEMENT TO IMPACT LOADING by Vogel, Filip; Holčapek, Ondřej; Konvalinka, Petr (2016) - The HPFRC samples were absorbed in average 64.03 % of impact energy, which is almost two times higher value than in the case of TRHPFRC samples. The HPFRC samples absorbed in average 64.03% of impact energy, which is almost two times higher value, than in the case of TRHPFRC samples. Keywords: deflection; energy; hpfrc; impact; reinforcement; samples; textile; trhpfrc
• CALCULATIONS OF ION TRAJECTORIES AT MAGNETOPLASMA SEPARATION AND EXPERIMENTS WITH POLYATOMIC GASES by Yuferov, Vladimir; Shariy, Sergey; Tkachova, Tetiana; Katrechko, Vyacheslav; Svichkar, Alexander; Ilichova, Vira; Shvets, Mykhailo; Mufel, Evgen (2017) - Calculations of molecular ions trajectories in SNF plasma rotated in EXH fields At the SNF heating [12] the amount of the FP can be significantly reduced due to removal of the FP with dissociation energy (εi) less than their own ionization energy (φi) and dissociation energy of uranium oxide (ε): εi < φi < ε. No. 5(93), pp.184-187. 77 Acta Polytechnica 57(1):71–77, 2017 1 Introduction 2 Calculations of molecular ions trajectories in SNF plasma rotated in EXH fields 3 Experiments with plasma of monatomic and polyatomic gases 4 Two-stage plasma source 5 Summary References Keywords: discharge; energy; figure; ionization; ions; plasma; snf; stage
• IMPROVEMENT OF ENERGY CONSUMPTION IN SPECTRUM SENSING COGNITIVE RADIO NETWORKS USING AN EFFICIENT TWO STAGE SENSING METHOD by Abdullah, Hikmat Najem; Abed, Hadeel Sami (2017) - Energy consumption is considered as a big problem in this technology, especially during a spectrum sensing. The theoretical analysis to calculate the amount of energy consumption, using the proposed method during sensing stage as well as the transmission stage during transmitting a local decision to the fusion center FC, are derived. Keywords: consumption; detection; energy; energy consumption; method; performance; sensing
• Prospects for Geothermal Energy Conversion through a Hybrid Combined Cycle Power Plant by Böszörményi, L.; Böszörményi, G. (2003) - In the case of the concept described here, progressive energy technologies enable very effective use of geothermal heat in comparison with only direct use in the DHN, especially in rhe summer period (see in Fig. 2). This indirect conversion of geothermal heat is much more eflicient than technologies for direct conversion (for example the Organic Rankine Cycle or Kalina cycle), which operate with llVo efficiency. Keywords: cycle; cycle power; energy; heat; plant; power; use; water
• ON THE COMMON LIMIT OF THE PT-SYMMETRIC ROSEN–MORSE II AND FINITE SQUARE WELL POTENTIALS by Kovács, József; Lévai, Géza (2017) - The PT -symmetrization of shape-invariant [5, 6, 8] and of the more general Natanzon-class potentials [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: PT -symmetric potential; bound states; scattering; Dirac-δ limit. Keywords: -symmetric; energy; phys; potential; real
• VERIFICATION OF BEHAVIOUR OF HUMAN ENAMEL FOR FRACTURE TOUGHNESS DETERMINATION by Hájková, Petra; Jíra, Aleš; Řehounek, Luboš (2018) - Fracture toughness describes the resistance of the material against the propagation of cracks at given stress values. 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). Keywords: cracks; enamel; energy; fracture; hardness; indentation; method; modulus; toughness
• ANALYSIS OF DALLARA T12 RACE CAR FRONT WING VIBRATIONS by Sorokin, Pavel Alekseevich; Khryakov, Kirill Stanislavovich; Gommers, Michiel (2018) - Spectral power density of front wing vibrations fS(f). Made up energy spectrums of wing vibrations for three specific cases arising during driving on the circuit. Keywords: car; dallara; energy; figure; racing; t12; vibrations; wing
• COMPARISON OF ENERGY FLOW STREAM AND ISENTROPIC METHOD FOR STEAM TURBINE ENERGY ANALYSIS by Blažević, Sebastijan; Mrzljak, Vedran; Anđelić, Nikola; Car, Zlatan (2019) - Overall, the HPT energy analysis, which represents a combina- tion of steam turbine energy power losses and energy efficiencies obtained by both of observed methods, is presented. Observed energy analysis methods cannot be directly compared because they are based on different sources of steam turbine energy losses, so, an overall steam turbine energy analysis is presented. Keywords: energy; energy analysis; energy efficiency; energy flow; energy power; flow rate; hpt; hpt energy; hpt load; load; mass flow; method; steam; steam mass; steam turbine; turbine energy
• SOLAR ABSORBER WITH A STRUCTURED SURFACE – A WAY TO INCREASE EFFICIENCY by Mrňa, Libor; Řiháček, Jan; Šarbort, Martin; Horník, Petr (2019) - Therefore, the modifi- cation of a known parallel hydroforming technology is necessary to develop, to produce solar absorbers with required structured surface (set of pyramid cavities). Formed solar absorber with the structured surface. Keywords: absorber; angle; apex; efficiency; energy; figure; hydroforming; surface
• SIMULATION OF LOW-GRADE COAL COMBUSTION IN REAL CHAMBERS OF ENERGY OBJECTS by Askarova, Aliya; Bolegenova, Saltanat; Bolegenova, Symbat; Beketayeva, Meruyert; Maximov, Valeriy; Nugymanova, Aizhan; Šafařík, Pavel (2019) - 108 http://dx.doi.org/10.3923/jeasci.2014.24.28 http://dx.doi.org/10.1134/S0018143906020081 http://dx.doi.org/10.1134/S0869864314060092 http://dx.doi.org/10.1134/S0869864310030145 http://dx.doi.org/10.1016/j.proeng.2012.07.517 http://dx.doi.org/10.1016/j.proeng.2012.07.507 Acta Polytechnica 59(2):98–108, 2019 1 Introduction 2 Pulverized coal characteristics 3 Modeling of coal combustion 4 Chemical kinetics of coal combustion 5 Basic characteristics of the boiler 6 Results of numerical experiments 7 Conclusion Acknowledgements References [11] A. Askarova, V. Messerle, A. Ustimenko, et al. Numerical simulation of pulverized coal combustion in a power boiler furnace. Keywords: boiler; chamber; chemical; coal; coal combustion; combustion; combustion chamber; energy; fuel; heat; kazakhstan; mass; power; reactions; simulation
• GENERAL MODEL OF RADIATIVE AND CONVECTIVE HEAT TRANSFER IN BUILDINGS: PART I: ALGEBRAIC MODEL OF RADIATIVE HEAT TRANSFER by Ficker, Tomáš (2019) - The zero sum of radiative heat energies is the general property of closed systems and follows from the first and second laws of thermodynamics. 1. Introduction Heat radiation represents a dominant transfer mechanism of heat energy inside buildings. Keywords: enclosure; energy; heat; matrix; method; radiosity; surfaces; transfer
• THE EFFECT OF THE FILLING RATIO ON THE OPERATING CHARACTERISTICS OF AN INDIRECT DRUM DRYER by Havlík, Jan; Dlouhý, Tomáš; Sabatini, Michel (2020) - Based on the experimental results, the effect of various drum filling by dried material on the mentioned operating characteristics was analysed. In order to appropriately compare measurements, the evaporation capacity values are determined for dry- ing to a similar value of final water content around 40wt% in dried material to illustrate the intensity of drying process in the developed phase. Keywords: capacity; dryer; drying; energy; evaporation; filling; heat; material; water
• Heating and Cooling Anomaly of a Rotating Body by Brůha, O.; Brůha, T. (2005) - According to (19) � � �t t t� �s * and then (20) reads: � � � � � * ( ) ( )( * ) ( * ) t E e E e m t t t t � � � �� � � � k0 s s c 1 12 0 6� � � , (21) where � ts is: � � t Q ms c � [1] (22) Expression (21) is a transcendent equation for unknown quantity � * t and given quantity � ts . (9) Substituting relations (6), (7), (8) and (9) in (5) we obtain an expression for rotational kinetic energy as a function of temperature E t r h e E et t k k0( ) � �� �1 4 0 4 2 0 0 2 2� � �� � �� � . Keywords: energy; t �; � r; � �
• COUNTER-ROTATING DUAL ROTOR WIND TURBINE LAYOUT OPTIMISATION by Hetyei, Csaba; Szlivka, Ferenc (2021) - The swept area for dual rotor wind turbines vary depending on the second turbine’s position, its value can be between S = π · r2 and S = 2 · π · r2 (r is the swept area’s radius). Wind turbines are no exception. Keywords: energy; figure; power; rotor; simulations; turbine; wind; wind turbine
• Hydrothermally-calcined waste paper ash nanomaterial as an alternative to cement for clay soil modification for building purposes by Robert, Ubong Williams; Etuk, Sunday Edet; Agbasi, Okechukwu Ebuka; Umoren, Grace Peter; Akpan, Samuel Sunday; Nnanna, Lebe Agwu (2021) - Particulars Materials Clay soil HCWPAN Cement Used form Dry Dry/powdery Dry/powdery Static angle of repose (29.4 ± 0.1)° (41.4 ± 0.3)° (39.8 ± 0.1)° Acta Polytechnica Chemical constituents Proportion (% wt) per material used Name Formula Clay soil HCWPAN Cement (PLC) Keywords: ash; building; cement; clay; clay soil; content; energy; hcwpan; journal; materials; paper; properties; samples; soil; strength; waste; water; ± ±
• Dirac oscillator in dynamical noncommutative space by Haouam, Ilyas (2021) - = E (0) − + E (0) + 2 ± √√√√(E(0) − − E (0) + )2 4 + λ2 |W12|2. Supposing that λ |W12| is small as compared to relevant energy scale, so that the difference of the energy eigenvalues of the unperturbed system equals λ |W12| < ∣∣∣E(0) − − E (0) + ∣∣∣ . Keywords: dirac; energy; oscillator; space
• Functional aerodynamics and its influence on the energy and thermal mode of a naturally ventilated double-skin transparent façade by Franek, Michal; Bielek, Boris; Macák, Marek; Klem, Josip (2022) - More modern works include computational fluid dynamics models, which can calculate airflow in DSTF cavity more accurately as compared to abovementioned mod- els 6. Conclusions The theory and practice of natural physical cavities is a very significant area of the future façade technologies of intelligent buildings. Keywords: aerodynamic; air; building; cavity; dstf; energy; façade; figure; flow; skin; wind
• Complex topological soliton with real energy in particle physics by Taira, Takanobu (2022) - We summarise the procedure used to find the classical masses of Higgs particle, massive gauge boson and t’Hooft-Polyakov monopole in non-Hermitian gauge field theory. Methods In this section, we will summarise the method used in [8–11] to find the masses of the Higgs particles, mas- sive gauge particles and t’Hooft-Polyakov monopoles in non-Hermitian gauge field theory. Keywords: energy; field; gauge; hermitian; masses; monopole; non; solutions
• Induction motor mechanical defect diagnosis using DWT under different loading levels by Bouzida, Ahcene; Abdelli, Radia; Boudouda, Aimad (2023) - Separation of induction motor rotor faults and low frequency load oscillations through the radial leakage flux. Instantaneous power signature analysis for misalignment fault diagnosis in 3-phased induction motors. Keywords: current; diagnosis; eccentricity; energy; faults; figure; frequency; induction; level; load; machine; misalignment; motor; stator
• Improving the energy efficiency of a tram’s running gear by Semenov, Stanislav; Mikhailov, Evgeny; Kliuiev, Sergii; Dižo, Ján; Blatnický, Miroslav; Ishchuk, Vadym (2023) - Currently, the transport industry is faced with the urgent task of ensuring the energy efficiency of vehicles, including rail vehicles. Among several ways to create rail vehicles with competitive energy efficiency indicators, one of the most promising is the use of innovative bogie designs [17–21]. Keywords: bogie; contact; design; energy; gear; movement; n·kn−1; rail; railway; resistance; running; track; tram; transport; vehicle; wheels
• Optimised rotating energy-efficient clustering for wireless sensor devices by sewing training-based optimisation by Altaee Naman, Hala; Jaffar Mohammed Ameen, Zinah (2024) - The average rates of node remaining energy at first node death for the two methods are shown in Fig- ure 2c. The average rates of node remaining energy at first node death for the two methods are shown in Figure 3c. Keywords: algorithm; clustering; energy; itrl; member; method; network; nodes; number; sensor; stbo; wsn
• A novel approach to feature extraction from gear condition monitoring signals by Bouhafs, Lina; Tamalouzt, Salah; Bouzida, Ahcene (2025) - and The position of the accelerometer is shown in Figure 8 under three different load conditions of 25, 50, and 60 Nm, and with a rotating frequency of 3 Hz. There- fore, three sets of measurements have been taken to investigate the impact of load on gear fault signals. It is characterised by several advantages, which can be summarised as follows: EDO is a powerful and versa- tile technique for signal analysis in signal processing that detects rapid changes, extracts peaks, measures variation speed, and analyses signal frequency, partic- ularly when there is significant noise interference and various vibrations. Keywords: edo; energy; fault; figure; frequency; gear; gearbox; method; noise; operator; signal; vibration
• The European Electricity Market and Cross-Border Transmission by Adamec, M.; Indráková, M.; Karajica, M. (2008) - Due to the impossibility of storing electric power, its price is highly volatile on spot markets (Fig. 2.1 Ways of trading in electricity There are two main markets, in which electric power is traded. Keywords: border; capacity; countries; electricity; energy; market; power; transmission
• High-resolution mapping of secondary cosmic rays with miniaturised stacked pixel telescope by Granja, Carlos; Chanal, Herve; Zach, Václav; Chvátil, David; Oancea, Cristina; Poklop, Dušan; Olšanský, Václav; Jakůbek, Jan (2025) - Keywords: Cosmic rays, particle tracking, radiation imaging, particle telescope, pixel detectors. The detec- tion and visualisation of cosmic ray tracks are shown in Figure 4. Keywords: cosmic; data; detector; energy; figure; particle; pixel; rays; telescope; timepix3; tracker; tracks

• Simulation Environment for Artificial Creatures by Kohout, K.; Nahodil, P. (2007) - 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: agent; architecture; data; environment; layers; sensors; simulation
• Pareto Principle in Datamining: an Above-Average Fencing Algorithm by Macek, K. (2008) - Let � : X n� � be attributes of X. (Attributes can be con- sidered as columns in a data table, i.e. the n-tuple from the i-th row. 2.3 Starting set of intervals The starting set of intervals is defined as follows R xi i BO O� �cc( ) , whereby B ni B y k B BO i� � � � � � � � � � � � ( ) ( ) , cc is the complement coding cc :� � n n� 2 and k is a parameter. Keywords: algorithm; data; fencing; intervals; � �
• Multi-Condition Training for Unknown Environment Adaptation in Robust ASR Under Real Conditions by Rajnoha, J. (2009) - 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; conditions; cs0 cs1; data; models; multi; noise; recognition; speech; training
• Gearbox Condition Monitoring Using Advanced Classifiers by Večeř, P.; Kreidl, M.; Šmíd, R. (2010) - Layer 2: This layer simply multiplies the incoming member- ship values according to a node function: � � �i x y� A B( ) ( ), (5) where �A represents the degree to which given x satisfies the quantifier Ai, 24 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 50 No. 1/2010 knowledge-rule fuzzifier defuzzifier fuzzy inference engineinput output (crisp)(crisp) Fig. [12]: � �d x t w 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: anfis; data; gearbox; gearboxes; input; layer; som; technical; vector; � �
• Ensemble Empirical Mode Decomposition: Image Data Analysis with White-noise Reflection by Kopecký, M. (2010) - 4 A comparison between EMD methods and EEMD methods Fig. 2. decompose the data with added white noise into the IMFs; Keywords: data; eemd; emd; fig; imfs; noise; signal; white
• Astronomical Image Compression Techniques Based on ACC and KLT Coder by Schindler, J.; Páta, P.; Klíma, M.; Fliegel, K. (2011) - Applying special compression algorithms based on specific properties of wavelet, fractal or Karhunen- Loève transform [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: algorithms; coder; coding; compression; data; image; lossless; lossy; transform
• Improving the Photometry of the Pi of the Sky System by Żarnecki, A. F.; Małek, K.; Sokołowski, M. (2011) - 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: data; magnitudo; photometry; reference; sky; stars
• PhpHMM Tool for Generating Speech Recogniser Source Codes Using Web Technologies by Krejčí, R. (2011) - About the author Robert Krejč́ı deals with digital signal processing and speech recognition focusing on optimisation of speech recogniser algorithms for systems with limited hardware resources. 2: Graphically expressed database structure for speech model 2.5 Selection of hardware platform We work on optimizing algorithms of speech recognis- ers for platforms of multi-core digital signal proces- sors of the TMS320C6000 family from Texas Instru- ments. Keywords: code; data; optimisation; recogniser; speech; tool
• Cataclysmic Variables — X-rays and Optical Activity in V1223 Sgr and V709 Cas by Gális, R.; Hric, L.; Kundra, E.; Münz, F. (2011) - Typically, soft X-ray modulations were observed in the orbital period, in spin period of WD, or a beat between the two in IPs. 2.1 Intermediate polar V1223 Sgr IP V1223Sgr is a bright X-ray source (4U 1849-31) with possible X-ray flare activity. Keywords: band; data; integral; ips; kev; ray
• Czech Participation in INTEGRAL: 1996–2011 by Hudec, R.; Blažek, M.; Hudcová, V. (2011) - 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, we have worked on 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: cvs; czech; data; ibis; integral; isdc; objects; omc; optical; ray; rts2
• A New Fast Silicon Photomultiplier Photometer by Meddi, F.; Ambrosino, F.; Rossi, C.; Nesci, R.; Sclavi, S.; Ruggieri, A.; Sestito, S.; Bruni, I.; Gualandi, R. (2011) - 5: Power Spectra of the Crab Pulsar signal detected by MPPC0 (upper) and P3E0 (lower) Fig. 6: Crab Pulsar light curves folded by “efold” for MPPC0 (upper) and P3E0 (lower) 3 Observational test: the Crab Pulsar On February 5, 2011 we observed the Crab Pulsar for 3 300 seconds with 0.55 ms (P3E0) and 1 ms (MPPC0) sampling in good photometric conditions (seeing ∼ 1.5 arcsec). Keywords: crab; data; pulsar; signal; telescope
• Ultra Low Dispersion Spectroscopy with Gaia and Astronomical Slitless Surveys by Hudec, R.; Hudec, L.; Klíma, M. (2012) - 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: data; dispersion; gaia; lds; plates; prism; spectra
• Prediction of Lower Extremity Movement by Cyclograms by Kutilek, P.; Viteckova, S. (2012) - 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: angle; area; cyclogram; data; gait; human; joint; knee; network; neural; use; vol
• Creating a Multi-axis Machining Postprocessor by Vavruška, Petr (2012) - 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: axis; data; machine; postprocessor; tool
• Photometric Analysis of Pi of the Sky Data by Opiela, Rafał; Małek, Katarzyna; Mankiewicz, Lech; Siudek, Małgorzata; Sokołowski, Marcin; Żarnecki, Aleksander Filip (2013) - 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: catalog; data; measurements; photometry; quality; sky; stars
• Luiza: Analysis Framework for GLORIA by Żarnecki, Aleksander Filip; Piotrowski, Lech Wiktor; Mankiewicz, Lech; Małek, Sebastian (2013) - 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). The HEP experiments have to deal with enormous amounts of data and distributed data analysis is therefore essential. Keywords: analysis; data; framework; gloria; image; luiza; marlin; processor
• HIGHLIGHTS FROM THE LHC by Straessner, Arno (2013) - Keywords: LHC, ATLAS, CMS, Standard Model measurements, SM Higgs boson, MSSM Higgs boson, supersymmetry, top quark, exotic particle searches. σ1 ± σ2 ± = 7 TeVs ­1 Ldt = 4.6­4.9 fb∫ ATLAS 2011 2011 Data CLs Limits Higgs boson mass (GeV) 100 200 300 400 500 S M σ/ σ 9 5 % C L l im it o n ­110 1 10 Observed Expected (68%) Expected (95%) Observed Expected (68%) Expected (95%) ­1L Keywords: atlas; cms; collaboration; data; exp; higgs; lhc; phys; theo
• RESULTS FROM THE XENON100 EXPERIMENT by Persiani, Rino (2013) - The electronic recoil band in log10(S2/S1) vs. en- ergy space defines the region of background events from β- and γ-particles (blue dots in Fig. 3). live days DM search The last run of XENON100 represents 224.6 live days of dark matter search data. Keywords: background; dark; data; detector; events; matter; search; shield; xenon100
• ASTRONOMICAL PLATE ARCHIVES AND SUPERMASSIVE BLACK HOLE BINARIES by Hudec, René (2013) - Singapore: World Scientific Publishing, in 3 volumes, ISBN 981-256-667-8 (set), ISBN 981-256-980-4 (Part A), ISBN 981-256-979-0 (Part B), ISBN 981-256-978-2 (Part C), 2005, XLVIII + 2492 pp.: 2005 605 Acta Polytechnica 53(Supplement):601–605, 2013 1 Introduction 2 Astronomical plate archives and HE/UHE astrophysics: motivation 3 Historical optical light curves and binary black holes in blazars 4 Example of plate archive data mining 5 Other examples of HE/VHE/UHE science with astronomical photographic plate archives 6 Conclusion Acknowledgements References Historical optical light curves and binary black holes in blazars This review focuses on the use of long-term data from astronomical plate archives for binary blazars. Keywords: archives; binary; blazars; data; light; plate; term
• AGILE DATA CENTER AT ASDC AND AGILE HIGHLIGHTS by Pittori, Carlotta (2013) - 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 40MeV. 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: 100mev; agile; data; gamma; ray
• FROM GALACTIC TO EXTRAGALACTIC JETS: A REVIEW by Beall, James H. (2013) - 676 Acta Polytechnica 53(Supplement):671–676, 2013 1 Introduction 2 Concurrent radio and X-ray variability of Centaurus A (NGC 5128) as an indication of jet launch or jet–cloud interactions? 3 A comment on particle acceleration in the jet–ambient-medium interaction 4 Galactic microquasars and AGN jets 5 Concluding remarks Acknowledgements References An analysis of the data that have recently become available from observing campaigns, including VLA, VLBA, and satellite instruments, shows some remarkable similarities and significant differences in the data from some epochs of galactic microquasars, including GRS 1915+105, the concurrent radio and X-ray data Keywords: beall; data; jet; jets; radio; ray; variability
• FACT — STATUS AND FIRST RESULTS by 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. (2014) - FACT — First G-APD Cherenkov Telescope With the aim to monitor bright active galactic nu- clei (AGN) in the very high energy (VHE) range, the First G-APD Cherenkov Telescope (FACT) was designed for stable and robust operation. Inexpensive, small telescopes like FACT are ideal systems for extended monitoring of bright TeV blazars and multi-wavelength campaigns. Keywords: cherenkov; collaboration; data; fact; light; telescope
• “PI OF THE SKY” OFF-LINE EXPERIMENT WITH GLORIA by Majcher, Ariel; Cwiek, Arkadiusz; Cwiok, Mikołaj; Mankiewicz, Lech; Zaremba, Marcin; Zarnecki, Aleksander F. (2014) - Demonstrator experiments GLORIA allows users to run experiments in the net- work. To present the network capabilities and the perfor- mance of the tools, demonstrator experiments have been created in both categories. Keywords: analysis; data; gloria; line; luiza; sky
• SEGMENTING TAGGED CARDIAC MRI DATA USING A LOCAL VARIANCE FILTER by Oberhuber, Tomáš; Kučera, Slavomír; Loucký, Jakub; Súkupová, Lucie; Tintěra, Jaroslav (2014) - Keywords: image segmentation, medical data processing, tagged MRI data, local variance filter, graph cuts. Detection of the ventricles from the tagged MRI data In image segmentation, we aim to find one or more regions in the image such that their borders are de- fined by the edges in the image, and the intensity function is homogeneous inside this region. Keywords: data; graph; grid; image; method; mri; segmentation
• PHOTOMETRIC ANALYSIS OF PI OF THE SKY DATA by Opiela, Rafał; Małek, Katarzyna; Mankiewicz, Lech; Siudek, Małgorzata; Sokołowski, Marcin; Zarnecki, Aleksander Filip (2014) - Histograms of the percentage of bad catalog stars in a single frame. The detector response is correlated with the spectral type (B − V or J −K) of catalog stars. Keywords: catalog; data; quality; sky; stars
• ASSESSMENT OF POSTURAL INSTABILITY IN PATIENTS WITH A NEUROLOGICAL DISORDER USING A TRI-AXIAL ACCELEROMETER by Hanakova, Lenka; Socha, Vladimir; Schlenker, Jakub; Cakrt, Ondrej; Kutilek, Patrik (2015) - 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. Although tri-axial IMUs have been used 229 http://dx.doi.org/10.14311/AP.2015.55.0229 http://ojs.cvut.cz/ojs/index.php/ap L. Hanakova, V. Socha, J. Schlenker et al. Acta Polytechnica for quantifying postural instability in clinical practice, the methods for evaluating the measured data usu- ally use only two variables out of the three measured variables. Keywords: accelerations; confidence; data; ellipsoid; fos; patients; pts; standing; subjects; trunk
• SIMULTANEOUS FITS IN ISIS ON THE EXAMPLE OF GRO J1008–57 by 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. (2015) - Furthermore, it is necessary to distinguish between group parameters and global parameters. The corresponding parameters are called group parameters. Keywords: analysis; data; datasets; fits; group; isis; parameters
• COMPARISON OF AXIAL FAN ROTOR EXPERIMENTAL DATA WITH CFD SIMULATION by Prachař, Aleš (2016) - 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: blade; boundary; cfd; data; flow; pressure; rotor; simulation
• ANALYSIS AND IMPLEMENTATION OF APPLICATION SCHEMAS FOR THE INSPIRE BUILDINGS THEME by Med, Michal; Souček, Petr (2016) - Publication of INSPIRE data The whole implementation process will escalate with the publication of data according to Commission Reg- ulations No. 976/2009 of 19th October 2009 and No. 1311/2014 of 10th December 2014, amending Regulation No. 976/2009. Services Two kinds of services are required for the publica- tion of INSPIRE data – Download Services and View Services. Keywords: application; buildings; data; feature; implementation; information; inspire; metadata; schemas; services; theme; xml
• GIS, Information Technology and Spatial Planning by Maier, K. (2003) - Thus the state, regional and/or local governments will have to guarantee the quality of public GIS data, and re- sponsibility for data and information offered on the market will be a matter of business law. To ensure that as many users as possible may benefit from on-line access to GIS information, the internet presentation will have to manage only with sofnvare that is generally avail- able, i.e., freeware. Keywords: access; czech; data; decision; gis; information; internet; making; planners; planning; presentation; public; technology; users; vol
• The Tangential Force Affecting the Radial Baffles in a Stirred Vessel: Analysis of the Macro-instability Related Component by Hasal, P.; Fořt, I.; Kratěna, J. (2003) - [17] ob- served that higher MI frequency (about l0 7o of ltl) occurs at low impeller Reynolds number values, and that the lower 50 frequency. At each target position and relative impeller off-bottom clearance ClH, the value of Ren, was varied over the entire attainable inten'al. Keywords: component; data; flow; force; frequency; impeller; instability; liquid; macro; mixing; values; vessel; vol
• BATHYMETRY FROM WORLDVIEW-3 SATELLITE DATA USING RADIOMETRIC BAND RATIO by Parente, Claudio; Pepe, Massimiliano (2018) - In addition, in particular places where it is difficult to carry out the survey by classic methods, the bathymetry from satellite data can be the only mode to obtain the depth of the backdrop. Using WV-3 satellite data and the Stumpf method, the paper intends to investigate the possibility of obtaining bathymetric data in a specific area where the water is not particularly clear. Keywords: area; band; bathymetry; data; depth; imagery; method; ratio; remote; satellite; sensing; values; water; worldview-3
• Stellar Image Interpretation System Using Artificial Neural Networks: by Alawy, A. El-Bassuny; Elnagahy, F. I. Y.; Haroon, A. A.; Azzam, Y. A.; Šimák, B. (2004) - 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 Keywords: ccd; data; frame; function; images; star; vol
• A NOVEL PROJECTION ALGORITHM FOR PRODUCTION LAYOUT EXTRACTION FROM POINT CLOUDS by Bureš, Marek; Martirosov, Sergo; Polcar, Jiří (2019) - However, there is still a lack of software solutions for a simple and successful model creation from point cloud data or data evaluation. Furthermore, a newly developed algorithm for an extraction of specific areas of point cloud is introduced. Keywords: algorithm; cloud; cloudslicer; data; figure; laser; layout; modelling; point; scanning; software
• AUTOMATIC EEG CLASSIFICATION USING DENSITY BASED ALGORITHMS DBSCAN AND DENCLUE by Piorecký, Marek; Štrobl, Jan; Krajča, Vladimír (2019) - Objects are, in our case, the segments of EEG signals. The program WF exploits K-means in clinical practice and we can use them to compare K-means with density based algorithms. 2.4. Keywords: activity; algorithm; artefacts; classes; classification; data; dbscan; denclue; density; eeg; means; number; objects; segments; signal
• AUTOMATIC RECONSTRUCTION OF ROOF MODELS FROM BUILDING OUTLINES AND AERIAL IMAGE DATA by Hron, Vojtěch; Halounová, Lena (2019) - A global solution to topological reconstruction of building roof models from airborne lidar point clouds. Automatic extraction of building roofs using LIDAR data and multispectral imagery. Keywords: building; building models; clouds; data; edges; height; hips; image; models; outlines; point; reconstruction; ridge; roof
• A Component-based Software Development and Execution Framework for CAx Applications by Matsuki, N.; Tokunaga, H.; Sawada, H. (2004) - 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; component; data; parametric; platform; software; xml
• USING THE AUTOMATIC VECTORISATION METHOD IN GENERATING THE VECTOR ALTIMETRY OF THE HISTORICAL VLTAVA RIVER VALLEY by Kratochvílová, Darina; Cajthaml, Jiří (2020) - Examples of errors in base map data. When merging map sheets, only contour lines with same elevation were intercon- nected. Keywords: arcscan; contour; data; file; lines; map; maps; raster; sheets; vectorisation
• ARTIFICIAL NEURAL NETWORK APPROACH FOR THE IDENTIFICATION OF CLOVE BUDS ORIGIN BASED ON METABOLITES COMPOSITION by Rustam; Gunawan, Agus Yodi; Kresnowati, Made Tri Ari Penia (2020) - 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: backpropagation; buds; clove; data; layer; network; neural; neurons; sets; testing; training
• Fuzzy Dynamic Analysis of a 2D Frame by Štemberk, P.; Kruis, J. (2004) - ( ).k k k kb b b� � �� � � (6) The first five mode shapes are shown in Figs. The intervals defined for a specific value of the membership function, e.g. � � 0.7, represent the so-called �-cuts. Keywords: analysis; data; function; numbers; response; � �
• SIMULATION OF A MANEUVERING AIRCRAFT USING A PANEL METHOD by Schoř, Pavel; Kouřil, Martin; Daněk, Vladimír (2021) - To obtain the correct solution of the circulation, it is necessary to know the strength of doublet wake wake panels and their spatial locations. Keywords: Flight mechanics, aerodynamics, simulation, panel method, maneuvering aircraft. Keywords: aircraft; body; control; data; equation; figure; flight; frame; method; panel; reference; simulation; wake
• EVALUATION OF REFLECTANCE FOR BUILDING MATERIALS CLASSIFICATION WITH TERRESTRIAL LASER SCANNER RADIATION by Costantino, Domenica; Pepe, Massimiliano; Angelini, Maria Giuseppa (2021) - Moreover, the Table 2 also shows that the HDS3000 detects all the materials above mentioned discrimi- nating them in a limited range of reflectance values (0.4 − 0.6), while the HDS6100, although it records in a wider range, exactly equal to the interval (0 − 1), shows saturation for fewer materials, which would also justify the dispersion of values about the mean. By observing the reflectance data, it is possible to deduce that for all scanned materials varying the azimuthal angle of incidence and being equal in ev- ery other experimental parameter, reflectance values change in a consistent way with the degree of crys- tallinity of the scanned object. Keywords: data; figure; hds6100; laser; materials; nadir; plaster; position; range; reflectance; scanning; tls; values
• Schema Management for Data Integration: A Short Survey by Almarimi, A.; Pokorný, J. (2005) - Polytechnica Vol. 45 No. 1/2005 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: data; database; information; integration; proc; schema; systems; xml
• 3D Information System of Historical Site – Proposal and Realisation of a Functional Prototype by Hodač, J. (2005) - Work with 3D data is closely connected with development in computer graphics (virtual reality). Currently, customers demand docu- mentation predominantly in 2D form, and they do not want 3D data and models. Keywords: data; information; project; site; technical; theatre
• MODIFIED POSSIBILISTIC FUZZY C-MEANS ALGORITHM FOR CLUSTERING INCOMPLETE DATA SETS by Rustam; Usman, Koredianto; Kamaruddin, Mudyawati; Chamidah, Dina; Nopendri; Saleh, Khaerudin; Eliskar, Yulinda; Marzuki, Ismail (2021) - Bezdek and Hathaway [4] developed the FCM algorithm to deal with the problem of clustering data sets with missing values. Bezdek and Hathaway [4] modified the FCM using the PDS in order to deal with the problems associated with clustering incomplete data sets known as the PDSFCM algorithm. Keywords: accuracy; algorithm; cluster; clustering; data; data sets; npspfcm; number; ocspfcm; percentage; values
• APPLICATION OF FMEA METHODOLOGY FOR CHECKING OF CONSTRUCTION’S PROJECT DOCUMENTATION AND DETERMINATION OF THE MOST RISK AREAS by Tuháček, Martin; Franek, Ondřej; Svoboda, Pavel (2020) - 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: construction; data; defects; documentation; fmea; method; project; project documentation; quality; research
• Towards Integration of CAx Systems and a Multiple-View Product Modeller in Mechanical Design by Song, H.; Eynard, B.; Lafon, P.; Roucoules, L. (2005) - 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: catia; data; design; integration; level; modeller; modelling; product; view; vol
• Improving QoS in mobile multimedia streaming with SCTP-PQ by Hüseynli, Alisettar; Şimşek, Mehmet; Akcayol, M. Ali (2023) - As can be seen in Figures 8a, 8b and 8c, SCTP- PQ has a more stable and much lower IPDV than standard SCTP for the first and second priority level data chunks. The developed protocol has been extensively tested and compared with SCTP. Keywords: chunks; control; data; data chunks; delay; frames; level; multimedia; packets; priority; protocol; queue; sctp; streaming
• Effect of cross-sections data on calculated static neutronic parameters of PWR MOX/UO2 core transient benchmark case using NODAL3 code by Luthfi, Wahid; Pinem, Surian (2023) - % -5.612 % -1.852 % 0.804 % % Error NODAL3-Serpent -3.072 % -0.255 % 0.926 % % -3.754 % B 0.847 0.871 0.823 1.357 1.733 1.073 0.831 0.392 -4.014 % -6.200 % -5.468 % -1.253 % 5.136 % -2.330 % -3.008 % Keywords: code; core; cross; data; fuel; helios; mox; nodal3; power; section; serpent
• Bayesian Classifier for Medical Data from Doppler Unit by Málek, J. (2006) - 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. Stenotic course – Signals measured in arteries with a stenotic diameter – Fig. Keywords: classifier; data; features; signals
• Effective Data Mining for a Transportation Information System by Haluzová, P. (2008) - 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. The rules fall into the Ant~Suc form in the first class, and the so-called contingent rules fall into the 24 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 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; association; attributes; data; delay; number; rules; tram
• Empowering IoT: leveraging data sensor communication with LoRAWAN in diverse environments by Noprianto, Noprianto; Dien, Habibie Ed; Sukmana, Septian Enggar; Al Baity, Fayyadh; Mentari, Mustika (2025) - This research tests LoRAWAN’s performance for sensor data communication both inside multi-story buildings (up to 8 storeys) and outside. In order to meet the research needs and opportu- nities related to LoRa technology, further research is required to analyse the performance of LoRa imple- mented in sensor data transmission using LoRaWAN modules as the data transmission medium. Keywords: antenna; communication; conditions; data; dbi; figure; gateway; iot; line; lorawan; node; performance; rssi; sensor; sight; signal; transmission
• Developing an effective approach to assess pavement condition for high friction surface treatment (HFST) installation by Roshan, Alireza; Abdelrahman, Magdy (2025) - Some agencies acknowledge facing the com- plexity of evaluating pavement conditions for HFST application. 6/2024 Developing an effective approach to assess pavement condition . . Keywords: accuracy; application; condition; data; decision; hfst; index; iri; learning; models; pavement; pci; research; tree; values
• RealTimeFrame – A Real Time Processing Framework for Medical Video Sequences by Gross, S.; Stehle, T. (2008) - Chapter two lists the requirements for a real time software framework for medical image data processing. 3 Work flow RealTimeFrame was designed to provide a flexible platform for medical image processing. Keywords: data; framework; image; medical; processing; realtimeframe; software; source; video
• Correlation between X-ray and gamma data of Swift measurements by Racz, Istvan I.; Balazs, Lajos G.; Horvath, Istvan; Pinter, Sandor (2025) - After the data of the variables were cleaned, the remaining variables were separated into two sets and we have determined the number of dimensions (canon- ical variables) that are significant in explaining the association between the 2 sets of variables (γ and X-ray data). Conclusion We used canonical correlation analysis to investigate the relationship between gamma (fluence, 1 sec peak flux, and duration) and X-ray data (11 hours flux, 24 hours flux, decay index, spectral index, and HI col- umn density). Keywords: bursts; column; correlation; data; density; flux; gamma; grb; grbs; index; ray; ray bursts; variables
• STDweb: simple transient detection pipeline for the web by Karpov, Sergey (2025) - Therefore, the transient detection on such images requires either acquiring the reference image by observing the same location after the transient faded down, which is impractical in most cases, or falling back to publicly available archival im- ages from some of the large scale sky surveys that 58 vol. Keywords: Photometric pipelines, transients, image processing. Keywords: analysis; aperture; calibration; catalogue; code; data; detection; figure; image; objects; order; photometry; processing; set; sky; society; stdweb; transient; user
• Early steep optical decay linked to reverse shock for GRB200131A by Jelínek, Martin; Novotný, Filip; Klose, Sylvio; Stecklum, Bringfried; Maleňáková, Alžběta; Štrobl, Jan (2025) - We observed an optical afterglow of GRB 200131A obtaining the first photometric point 63 s after the satellite trigger. On January 31, 2020 at 22:41:16 UT a long gamma- ray burst (GRB) was detected by instrument BAT onboard Swift satellite in the southwest of Cassiopeia constellation, about 15° northeast of M31, and was designated GRB 200131A Keywords: 200131a; afterglow; data; grb; mag; redshift; reverse; shock
• The spatial distribution of GRBs by Bagoly, Zsolt; Balazs, Lajos G.; Horvath, Zsuzsa; Horvath, Istvan (2025) - Revisiting the statistical isotropy of GRB sky distribution. Conclusion The yearly variances of redshift observations can be separated into two groups according to the afterglow measurements or the observation of the host galaxy’s spectral lines. Keywords: afterglow; bursts; data; distribution; gamma; grbs; host; observations; ray; redshift; sky
• The two-point correlation function of the GRBs by Bagoly, Zsolt (2025) - Revisiting the statistical isotropy of GRB sky distribution. Short GRBs are likely produced by the merger of compact objects, such as neutron stars or black holes, as proven by kilonova observations Keywords: bursts; correlation; data; distribution; exposure; function; gamma; grbs; point; ray; sky

• Effects of coupled diffusion and buoyancy forces on three-dimensional MHD convective Williamson-Casson nanofluid flow: a numerical study by Samudrala, Bhargavi; Gundagani, Murali; Jayalakshmi, K. (2025) - Influence of Lorentz force and induced magnetic field effects on Casson Micropolar nanofluid flow over a permeable curved stretching/shrinking surface under the stagnation region. Hall current and ion slip effects on 3D MHD nanofluid flow of Eyring-Powell fluid with gyrotactic microorganisms. Keywords: coefficient; diffusion; effect; figure; flow; heat; nanofluid; number; sheet; stretching; surface; transfer
• Wave propagation in a pipe conveying two phase flow by Oyelade, Akintoye O.; Ehinmowo, Adegboyega B.; Oribayo, Oluwasola; Abiodun, Yetunde O. (2025) - Keywords: Wave propagation, phase velocity, group velocity, two phase, natural frequency. − C2 p + 2CpvL √ βL ( 1 + KsvL αGρG ρL(1 − αG) ) − ( v2 L + v2 L ρG ρL K2 s αG (1 − αG) − T + P + θ ) = 0 (15) Then, the expressions for phase velocity and group velocity are defined as: Cp = 1 2 √ 4 ( vL √ βL + vL √ βL αGρG ρL(1 − αG) )2 + 4Γ + 2vL √ βL ( 1 + αGρG ρL(1 − αG) ) , (16) Keywords: conveying; flow; fluid; phase; pipes; velocity; wave
• Axial Force at the Vessel Bottom Induced by Axial Impellers by Fořt, I.; Hasal, P.; Paglianti, A.; Magelli, F. (2008) - 1: Pilot plant experimental equipment vessel was equipped with four radial baffles (width of baffles b T� 01. ) and was stirred with a four pitched blade impeller (pitch angle � � �45 , diameter D T� ( )2 5 , width of blade W D� 5), pumping downward. 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. Keywords: blade; dimensionless; flow; impeller; liquid; pressure; vessel; � �
• Fundamental Research on Hydraulic Systems Driven by Alternating Flow by Marcu, Ioan-Lucian; Banyai, Daniel-Vasile (2012) - [4] The simplest solution for the construction of a ro- tary hydraulic motor working with alternating flow is to use in the same assembly three different oscillat- ing motors with a gear rack (see elements 1 and 3 in Figure 2a and 2b). ap-4-12.dvi Acta Polytechnica Vol. 52 No. 4/2012 Fundamental Research on Hydraulic Systems Driven by Alternating Flow Ioan-Lucian Marcu1, Daniel-Vasile Banyai1 1Technical 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. Keywords: alternating; flow; motor; phase; pressure
• A Numerical Study of Wind Flow Over a Coal Storage Shelter by Bodnár, Tomáš; Beneš, Ludek; Pirkl, Luboš; Gulíková, Eva (2012) - A wind tunnel study of turbulent flow over model hills. Similar problems of atmospheric flows over various obstacles are often studied in the available literature. Keywords: dispersion; figure; flow; numerical; shelter; variant; wind
• The Research on Atmospheric Pressure Water Vapour Plasma Generation and Application for the Destruction of Wastes by Grigaitiene, Viktorija; Tamošiunas, Andrius; Valatkevičius, Pranas (2013) - Water vapour plasma torch in operation is showed in Fig. The chemical composition of water vapour plasma was established from the emission spectrum lines at 300 ÷ 800 nm range. Keywords: flow; plasma; s−1; torch; vapour; water
• COMPARISON OF COOLING SCHEMES FOR HIGH HEAT FLUX COMPONENTS COOLING IN FUSION REACTORS by Domalapally, Phani Kumar; Entler, Slavomir (2015) - 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: cooling; design; divertor; engineering; figure; flow; flux; fusion; heat; helium; tube
• LOCAL VELOCITY PROFILES MEASURED BY PIV IN AN VESSEL AGITATED BY RUSHTON TURBINE by Šulc, Radek; Pešava, Vít; Ditl, Pavel (2014) - Dimensionless radial fluctuation velocity profile – effect of impeller speed; z∗ = 0.1474. Keywords: mixing, Rushton turbine, Particle Image Velocimetry, flow, velocity profile, mean velocity, fluctuation velocity. Keywords: dimensionless; flow; hypothesis; impeller; mean; profile; velocity; vessel
• ANALYSIS OF TRANSONIC FLOW PAST CUSPED AIRFOILS by Stodůlka, Jiří; Šafařík, Pavel (2015) - Reduced parameter analysis of supersonic flow past trailing edge For a deeper investigation of this problem, the model of nonsymmetrical supersonic flow past a trailing edge [7] is proposed (Fig. The application of equations (17) and (18) to Case I of the cusped airfoil proved a regular interaction of supersonic flows on the sharp trailing edge. Keywords: angle; edge; flow; shock; trailing
• ELECTRODYNAMIC LOUDSPEAKER-DRIVEN ACOUSTIC COMPRESSOR by Šoltés, Martin; Červenka, Milan (2015) - Acoustic pressure amplitudes that they obtained were more than an order of magnitude larger than it had been possible before. Keywords: acoustic compressor, acoustic resonator, high amplitude acoustic field. Keywords: air; amplitude; delivery; figure; flow; pressure; resonator; valve
• EFFECT OF TUBE PITCH ON HEAR TRANSFER IN SPRINKLED TUBE BUNDLE by Kracík, Petr; Pospíšil, Jiří (2015) - 7.2. litres per minute, was 40 °C, or alternatively 45 °C. Keywords: sprinkled; tube bundle; heat transfer; tube pitch. 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: coefficient; film; flow; heat; heat transfer; liquid; transfer; tube
• CONDENSATION OF WATER VAPOR IN A VERTICAL TUBE CONDENSER by Havlík, Jan; Dlouhý, Tomáš (2015) - Keywords: condensation; vertical tube condenser; heat transfer coefficient. The Nusselt condensation model, which is often recommended for calculating the con- densing side HTC, is derived for conditions which need not be satisfied in real operation Keywords: condensation; condensation htc; film; flow; htc; method; shell; tube
• CFD ANALYSIS OF THE SPACER GRIDS AND MIXING VANES EFFECT ON THE FLOW IN THE CHOSEN PART OF THE TVSA-T FUEL ASSEMBLY by Juklíček, Jakub; Železný, Václav (2015) - 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: flow; grid; mixing; spacer; support
• AN EXPERIMENTAL ASSESSMENT OF THE PLATE HEAT EXCHANGER CHARACTERISTICS BY WILSON PLOT METHOD by Opatřil, Jan; Havlík, Jan; Bartoš, Ondřej; Dlouhý, Tomáš (2016) - Keywords: plate heat exchanger; Wilson plot; experimental measurement; heat transfer; pressure drop; friction factor. U overall heat transfer coefficient [W/m2 K] v velocity [m/s] Subscripts A fluid A B fluid B in inlet l liquid out outlet w wall Superscripts m exponent of Prandtl number n exponent of Reynolds number ∗ normalized value Acknowledgements The authors gratefully acknowledge the support of all colleagues from G.A.M. HEAT spol. Keywords: coefficient; exchanger; flow; heat; heat transfer; method; phe; pressure; transfer
• Sampling by Fluidics and Microfluidics by Tesař, V. (2002) - 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: control; fig; flow; jet; pressure; sample; sampling; state; unit; valve
• ANALYSIS OF INTENSIVELY BLASTED ELECTRIC ARC BURNING IN THE ARC HEATER'S ANODE CHANNEL by Senk, Josef; Jakubova, Ivana; Laznickova, Ilona (2016) - (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; arc; cathode; channel; flow; power; voltage
• JET ENGINE INLET DISTORTION SCREEN AND DESCRIPTOR EVALUATION by Pečinka, Jiří; Bugajski, Gabriel Thomas; Kmoch, Petr; Jílek, Adolf (2017) - Total pressure distortion is one of the three basic flow distortions (total pressure, total temperature and swirl distortion) that might appear at the inlet of a gas turbine engine (GTE) during operation. Accordingly, it was decided to evaluate the most commonly used distortion descriptors for basic types of total pressure distortions created by several screens. Keywords: descriptors; distortion; engine; flow; inlet; mass; pressure; radial; rate; ring; screen; total
• HEAT TRANSFER ENHANCEMENT AND PRESSURE DROP OF GROOVED ANNULUS OF DOUBLE PIPE HEAT EXCHANGER by Sunu, Putu Wijaya; Rasta, I Made (2017) - 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: annulus; drop; exchanger; flow; grooves; heat; pipe; pressure; transfer
• FICTITIOUS DOMAIN METHOD FOR NUMERICAL SIMULATION OF INCOMPRESSIBLE VISCOUS FLOW AROUND RIGID BODIES by Beno, Matej; Patzák, Bořek (2017) - 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: domain; flow; fluid; method
• Fluidic Control of Molten Metal Flow by Tesař, V. (2003) - molten metal flow - certainly a highly unusual signal carrying medium, but fully in line with the usual tendency of fluidics to employ the working fluid for signal transfer and processing. the most unusual feature of the discussed con- trollers - signal transfer and processing (sign inversion and amplification) in molten metal flows - is realisable only thanks to the progress in the materials and manufacturing side of the project. Keywords: chamber; control; fig; flow; metal; molten; radial; tundish; valve; vortex; vortex chamber
• RELATION BETWEEN LEFT VENTRICULAR UNLOADING DURING ECMO AND DRAINAGE CATHETER SIZE ASSESSED BY MATHEMATICAL MODELING by Strunina, Svitlana; Hozman, Jiri; Ostadal, Petr (2017) - The impact of various catheter sizes (from 5Fr to 10Fr) and extracorporeal blood flow values (from 1L/min to 5L/min) were investigated. Volume rate value withdraw from LV during VA ECMO in Modelica. 4. Keywords: blood; catheter; drainage; ecmo; extracorporeal; flow; value; volume
• PARAMETERS EFFECTING FORCED VORTEX FORMATION IN BLADE PASSAGEWAY OF DYNAMIC AIR CLASSIFIER by Adamčík, Martin; Svěrák, Tomáš; Peciar, Peter (2017) - Keywords: rotor air classifier, forced vortex, blade passageway, particle image velocimetry (PIV), numerical simulation CFD. This may be attributed to the difficulties related to the PIV implementation into rotor air classifier. Keywords: air; air classifier; blade; classifier; classifier rotor; fan; figure; flow; particles; passageway; radial; rotor; velocities; velocity; vortex
• Inlet Channel for a Ducted Fan Propulsion System of a Light Aircraft by Ritschl, E.; Theiner, R.; Hanus, D. (2003) - Smoothness and continuity of the channel chord ratio are the main requirements of channel design. Our boundary layer calculation [5] shows that the optimum channel cross-section taper is 0.54 per 1 m of channel length (Fig. 3). Keywords: channel; design; fig; flow; velocity
• A MULTIPHASE FLOW LOOP DESIGN FOR INVESTIGATING THE PARTIAL PHASE SEPARATION IN A PIPE TEE by Saieed, Ahmed; Memon, Zeeshan Qadir; Tran, Minh Cong; King Soon, William Pao (2019) - Before the mixing, phase flow rates were 399 https://doi.org/10.14311/AP.2019.59.0399 https://ojs.cvut.cz/ojs/index.php/ap A. Saieed, Z. Q. Memon, M. C. Tran, Two-phase slug flow separation at T-junction with regular and reduced vertical side arm. Keywords: air; figure; flow; flow loop; junction; loop; phase; separation; water
• ON CFD INVESTIGATION OF RADIAL CLEARANCE OF LABYRINTH SEALS OF A TURBINE ENGINE by Čížek, Michal; Pátek, Zdeněk (2020) - 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. 1/2020 On CFD Investigation of radial clearance of labyrinth seals. . Keywords: clearance; engine; fig; flow; pressure; seals; teeth; turbine
• Analysis of Unsteady Transonic Flow Fields by Means of the Colour Streak Schlieren Method by Ulrych, J. (2004) - For the CSSM analysis M� � 0.9, � � 4 deg, �� � �3 deg, f � 1, 15, 30 Hz, and t � 2.2 mm. 4: CSSM – the final flow field image a) b) c) Fig. 5: a) M� � 0.9, � � 4 deg, �� � �3 deg, f � 1 Keywords: deg; f �; flow; oscillation; shock; � �
• On the Effects of an Installed Propeller Slipstream on Wing Aerodynamic Characteristics by Catalano, F. M. (2004) - The relative position between propeller and wing could be changed in the pusher model, and a total of 7 positions were analysed. [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. Keywords: effect; fig; flow; propeller; pusher; separation; tractor; transition; wing
• ANALYSIS OF STATIC ANGLE OF REPOSE WITH RESPECT TO POWDER MATERIAL PROPERTIES by Macho, Oliver; Demková, Karin; Gabrišová, Ľudmila; Čierny, Matúš; Mužíková, Jitka; Galbavá, Paulína; Nižnanská, Žofia; Blaško, Jaroslav; Peciar, Peter; Fekete, Roman; Peciar, Marián (2020) - This paper investigates the Angle of Repose (AoR) of powder materials with respect to their morphological and rheological properties. The AoR measurement is used in many applications of processing, storing and handling powder materials, determining the slope stability, furnace design and many other uses. Keywords: aif; angle; aor; doi:10.1016; flow; material; particles; powder; properties; repose; value
• 3-D MODELING OF HEAT AND MASS TRANSFER PROCESS DURING THE COMBUSTION OF SOLID FUEL IN A SWIRL FURNACE by Askarova, Aliya; Bolegenova, Saltanat; Maximov, Valeriy; Bolegenova, Symbat; Nugymanova, Aizhan; Šafařík, Pavel (2019) - Mathematical simulation of pulverized coal in combustion chamber. Computational modeling of heat and mass transfer processes in combustion chamber at power plant of kazakhstan. Keywords: air mixture; boiler; combustion; combustion chamber; flow; flow method; method; supplying; swirl
• HEAT TRANSFER ENHANCEMENT AND FRICTION IN DOUBLE PIPE HEAT EXCHANGER WITH VARIOUS NUMBER OF LONGITUDINAL GROOVES by Sunu, Putu Wijaya; Anakottapary, Daud Simon; Suarta, I Made; Santosa, I Dewa Made Cipta; Suarsana, Ketut (2020) - 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: annulus; doi:10.1016; exchanger; flow; fluid; friction; grooves; heat; heat exchanger; heat transfer; number; pipe; transfer; tube
• Study of the Discharge Stream from a Standard Rushton turbine impeller by Kratěna, J.; Fořt, I. (2004) - � � ��2 1 2 � d (17) (8) 3 Results of experiments Experiments were carried out in a flat-bottomed cylindri- cal pilot plant mixing vessel with four baffles at its wall (see Fig. 3) of diameter T � 0.3 filled with either water (� � 1 mPa�s) or with one of two water glycerol solutions of dy- namic viscosity � � 3 mPa�s and � � 6 mPa�s, respectively. Keywords: discharge; flow; impeller; radial; stream; turbine; � �
• COMPUTATIONAL METHODOLOGY TO ANALYZE THE EFFECT OF MASS TRANSFER RATE ON ATTENUATION OF LEAKED CARBON DIOXIDE IN SHALLOW AQUIFERS by Fučík, Radek; Solovský, Jakub; Plampin, Michelle R.; Wu, Hao; Mikyška, Jiří; Illangasekare, Tissa H. (2021) - The average temperatures in the static case and background flow experiments were 37◦C and 26◦C, respectively. The purpose of this present study is to develop a numerical modeling methodology to assess the factors that control inter-phase CO2 mass transfer during migration through heterogeneous 2D porous media systems in the shallow subsurface where CO2 can only exist in the gaseous and dissolved phases. Keywords: background; co2; flow; gas; mass; phase; water
• ON THE USE OF A FLUX-SPLITTING SCHEME IN THE NUMERICAL FLUTTER ANALYSIS OF A LOW-PRESSURE TURBINE STAGE by Pátý, Marek; Halama, Jan (2021) - Introduction The interaction of flow and structure leading to vi- brations has long been recognised as one of the most essential problems faced by turbine blade designers. The mode of blade oscillation is a harmonic translation in a direction of 63° from the 139 Marek Pátý, Jan Halama Acta Polytechnica Figure 3. Keywords: accuracy; aerodynamic; blade; cell; damping; domain; face; flow; flutter; gradient; limiter; method; numerical; order; pressure; reconstruction; results; turbine
• CHAOTISED POLYMERIC HOLLOW FIBRE BUNDLE AS A CROSSFLOW HEAT EXCHANGER IN AIR-WATER APPLICATION by Kroulíková, Tereza; Astrouski, Ilya; Raudenský, Miroslav (2020) - Intensification of heat transfer of polymeric hollow fiber heat exchangers by chaotisation. That study also mentions the significant influence of the diameter of the polymeric hollow fibre on heat transfer coefficients on both inner and outer surfaces of the fibre. Keywords: air; coefficient; fibre; flow; heat; heat transfer; modules; transfer; water
• ON THE SENSITIVITY OF THE NONLINEAR TERM IN THE OUTFLOW BOUNDARY CONDITION by Neustupa, Tomáš; Winter, Ondřej (2021) - Figure 4 shows details of the contours of u for Re = 10 for ξ = −0.6, 0, 0.6. One can see that ξ = 0 and ξ = −0.6 gives almost the same results, but there is a significant difference (shift) between the contours obtained with ξ = 0 and ξ = 0.6. Keywords: boundary; condition; flow
• NUMERICAL SIMULATION OF LID-DRIVEN CAVITY FLOW BY ISOGEOMETRIC ANALYSIS by Bastl, Bohumír; Brandner, Marek; Egermaier, Jiří; Horníková, Hana; Michálková, Kristýna; Turnerová, Eva (2021) - In this paper, we present numerical results obtained by an in-house incompressible fluid flow solver based on isogeometric analysis (IgA) for the standard benchmark problem for incompressible fluid flow simulation – lid-driven cavity flow. Keywords: Isogeometric analysis, fluid flow simulation, B-splines, Navier-Stokes equations. Keywords: analysis; basis; cavity; continuity; discretization; doi:10.1016; domain; element; flow; functions; isogeometric; methods; problem; results; spline; velocity
• AN ANALYSIS OF THE LIQUID FILMS BREAK-UP USING THE COMPUTER VISION TECHNIQUE by Měšťanová, Lucie; Bartoš, Ondřej (2021) - Measurement method The wind tunnel is connected with the compressed air storage vessel or to the steam supply grid. Segmented images resulting from the GMM-based segmentation give the lowest number of foreground pixels. Keywords: contour; distribution; droplets; figure; flow; image; liquid; measurement; method; number; otsu; steam; turbines
• A CONCEPTUAL STUDY OF A LIQUID METAL ALLOY IN A DISK-SHAPED MAGNETOHYDRODYNAMICS CONVERSION SYSTEM by Ayeleso, Ayokunle O.; Raji, Atanda K. (2021) - Flow rate measurements in turbulent liquid metal channel flow using Time-of-Flight Lorentz force velocimetry. Numerical and experimental study of the traveling magnetic field effect on the horizontal solidification in a rectangular cavity part 1: Liquid metal flow under the TMF impact. Keywords: channel; current; density; disk; flow; fluid; liquid; magnetic; mhd; study; velocity
• Water-air ejector with conical-cylindrical mixing chamber by Sliusenko, Andrii; Ponomarenko, Vitalii; Forostiuk, Inna (2021) - Liquid jet gas ejectors: designs of motive nozzles, performance efficiency. Study of a gas–liquid ejector and its application to a solar-powered bi-ejector refrigeration system. Keywords: apparatus; chamber; ejector; entrainment; flow; gas; jet; jet apparatus; liquid; mixing; nozzle; ratio
• Stationary solutions of incompressible viscous flow in a wall-driven semi-circular cavity by Erturk, Ercan (2021) - Keywords: Driven semi-circular cavity flow, large Reynolds number flow, numerical solutions, 2-D incompressible viscous flow. Streamline contours of semi-circular cavity flow as Reynolds number increases. Keywords: cavity; cavity flow; et al; figure; flow; number; numerical; reynolds; wall
• Measurement of solid particle emissions from oxy-fuel combustion of biomass in fluidized bed by Červený, Ondřej; Vybíral, Pavel; Hemerka, Jiří; Mareš, Luďek (2022) - Solid particle emission measurement To determine the properties of solid particles contained in the flue gas, we used the gravimetric analysis. Values of dilution ratio obtained using the given method and experimentally by measurement as a function of sample gas temperature. Keywords: dilution; dilutor; figure; flow; gas; measurement; ratio
• Investigation of the effect of elbow pipes of Ti6Al4V, 304 stainless steel, AZ91 materials on erosion corrosion by finite element analysis by Gök, Kadir; Danışmaz, Merdin; Urtekin, Levent; Ada, Hediye Deniz; Gök, Arif (2024) - There are some studies in the literature on the corro- sion damage caused by the type of elbow pipe material that carries the fluid on the inner surface of the pipe. Licensed under a CC-BY 4.0 licence Published by the Czech Technical University in Prague INVESTIGATION OF THE EFFECT OF ELBOW PIPES OF TI6AL4V, 304 STAINLESS STEEL, Keywords: corrosion; deformation; elbow; erosion; figure; flow; fluid; materials; modulus; pipe; shear
• Shock wave configuration in a transonic flow through a mid-section of a last stage turbine blade cascade equipped with a part-span connector by Radnic, Tomáš; Šafařík, Pavel; Luxa, Martin; Šimurda, David (2023) - Keywords: Transonic flow, blade cascade, part-span connector, numerical simulation, shock wave, steam turbine. Therefore, the tie-boss is expected to have a profound effect on the configuration of shock waves. Keywords: blade; boss; flow; shock; shock wave; tie; waves
• On the vortex identification within a linear blade cascade - an experimental research by Flídr, Erik (2024) - Keywords: Linear blade cascade, vortex identification, H criteria, experimental research, pressure measurements. The paper aims to identify vortex structures in the linear blade cascade as precisely as possible from a new perspective. Keywords: blade; cascade; flow; identification; vortex; vortices
• The effect of the inlet chamber and diffuser on the reverse aerodynamic performance of an axial flow fan by Cyrus, Václav; Cyrus, Jan (2024) - Keywords: Axial flow fan, reversing, inlet chamber, performance, simulation. Axial flow fan (Stage A: Dt = 600 mm, Dh = 330 mm). Keywords: chamber; coefficient; fan; figure; flow; flow fan; inlet; inlet chamber; performance; pressure; ratio; reversal; reverse; stage
• Experimental investigation of an entropy production in a linear blade cascade by Flídr, Erik (2024) - Although the theoretical description is powerful, the full picture of the vortices in blade cascades is beyond the capability of theoretical predictions. The presented paper focuses on an experimental investigation of entropy production in a linear blade cascade composed of prismatic blades for two pitch-to-chord ratios, t/c = 0.6, and 0.9. Keywords: blade; boundary; cascade; entropy production; flow; inlet; inlet flow; number; outlet; pressure; reynolds; wall
• Modelling and analysis of three-dimensional chemically reacting, radiating Casson-nanofluid flow: thermophoresis and Brownian motion effects by Tanuku, Poorna Kantha; Mamidi, Lakshmi Prasanna; Gundagani, Murali (2024) - [25] found the impact of chemical reaction effects on unsteady MHD fluid flow past an infinite vertical plate embedded in a porous medium with a variable suction. [24] carried out an analysis of Soret and Dufour effects on unsteady MHD flow past a semi-infinite vertical porous plate using finite differ- ence method. Keywords: effects; figure; flow; fluid; heat; mhd; radiation

• Analysis of surface roughness and machining performance of AZ91 magnesium alloy cut by WEDM by Urtekin, Levent; Yılan, Faik; Şahin, İbrahim Baki; Gök, Kadir (2025) - [31] investigated the influence of WEDM process parameters on material removal, surface characteristics, and corrosion rate of ZE41A Mg alloy. Surface topography maps of samples depending on WEDM process parameters. unable to produce the same level of surface rough- ness as short pulses combined with high peak values. Keywords: alloy; analysis; az91; machining; magnesium; materials; mrr; parameters; performance; process; roughness; surface; toff; ton; wedm; wire
• Influence of a Point-to-Plane DC Negative Corona Discharge on Gel Surfaces by Klenko, Y.; Scholtz, V. (2008) - Corona discharges are usually realized in such a way that one of the electrodes has a small radius of curvature. Each type of gel electrode was placed in a standard Petri dish (90 mm in diameter). Keywords: corona; discharge; fig; gel; needle; point; surface
• Surface Roughness and Porosity of Hydrated Cement Pastes by Ficker, T.; Martišek, D.; Jennings, H. M. (2011) - [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. 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. Keywords: cement; fracture; graphs; parameters; porosity; ratio; roughness; surface; water
• Relation between Cutting Surface Quality and Alloying Element Contents when Using a CO2 Laser by Litecká, J.; Fabianová, J.; Pavlenko, S. (2011) - The experimental results are shown in graphs which illustrate the suitability of materials for achieving required cutting surface quality parameters. 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: cutting; laser; material; parameters; quality; steel; surface
• Surface Morphology of Porous Cementitious Materials Subjected to Fast Dynamic Fractures by Ficker, T. (2011) - References [1] Ficker, T., Martǐsek, D., Jennings, H. M.: Rough- ness of fracture surfaces and compressive strength of hydrated cement pastes, Cem. Concr. Keywords: 3D profile analysis, fracture surfaces, cement-based materials, confocal microscopy. Keywords: cement; fracture; surface
• Boron Doped Nanocrystalline Diamond Films for Biosensing Applications by Petrák, V.; Krucký, J.; Vlčková, M. (2011) - Elec- trochemical Impedance Spectroscopy (EIS) was used to study in situ changes related to lipid membrane formation and disruption by peptide-induced interactions. In past decades, lipid membranes on a solid substrate have attracted considerable inter- est, from the point of view of both fundamental and applied science. Keywords: diamond; disruption; impedance; lipid; membrane; ncd; surface
• Optical Detection of Charged Biomolecules: Towards Novel Drug Delivery Systems by Petráková, V. (2011) - 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: luminescence; molecules; polymers; surface; vol
• An Optimal Procedure for Determining the Height Parameters of Fracture Surfaces by Ficker, T. (2012) - 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. fahmi_dry_cyc_impr.eps Acta Polytechnica Vol. 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: fracture; parameters; sites; surface
• Influence of the Surface Layer when the CMT Process Is Used for Welding Steel Sheets Treated by Nitrooxidation by Michalec, I.; Marônek, M. (2012) - [4] Dománková, M. et al: Influence of nitridation and nitrooxidation processes on microstructure and corrosion properties of low carbon deep-drawing steels. 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: corgon18; material; nitrooxidation; steel; surface; welding
• Geometrical Modeling of Concrete Microstructure for the Assessment of ITZ Percolation by Rypl, Daniel; Bým, Tomáš (2012) - [27] constructed over a set of particle surface points. 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. Keywords: aggregate; bounding; box; expansion; itz; particle; percolation; points; spheres; surface; volume
• High-Speed Monitoring of Dust Particles in ITER ELMs Simulation Experiments with QSPA Kh-50 by Makhlaj, Vadym A.; Garkusha, Igor E.; Aksenov, Nikolay N.; Chuvilo, Alexander A.; Landman, Igor S. (2013) - 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]. 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. Keywords: dust; heat; particles; plasma; qspa; surface; tungsten
• Positioning of the Precursor Gas Inlet in an Atmospheric Dielectric Barrier Reactor, and its Effect on the Quality of Deposited TiOx Thin Film Surface by Píchal, Jan; Klenko, Julia (2013) - 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: deposition; film; plasma; reactor; slm; surface; ttip
• Modification of Composite Material Fillers by Atmospheric Plasma Discharge by Tichy, David; Hajkova, Pavlina (2013) - This work is focused on the observation of the influence of cold atmospheric dielectric barrier discharge (DBD) on a modification of textile samples. Textile samples The modified samples were made from a commercial E-glass. Keywords: effect; modification; plasma; sample; surface; textile; wettability
• Plasma–Surface Interactions Under High Heat and Particle Fluxes by Temmerman, Gregory De; Bystrov, Kirill; Liu, Feng; Liu, Wei; Morgan, Thomas; Tanyeli, Irem; Berg, Miranda van den; Xu, Haiyan; Zielinski, Jakub (2013) - High-resolution SEM images of helium- induced nanostructures formed on (a) tungsten and (b) molybdenum surfaces after high flux plasma exposure. The linear plasma devices at FOM can generate plasma fluxes of up to 1025 m−2 s−1 in DC opera- tions and up to 1026 m−2 s−1 for ms durations when the plasma source is pulsed. Keywords: conditions; fluxes; fusion; heat; nucl; particle; plasma; psi; surface; tungsten
• Experimental Investigations on Drying of Porous Media Using Infrared Radiation by Haghi, A. K. (2001) - Where S = speed of fabric in the oven (m/s), L = fabric width (m), D = superficial weight of dry fabric (g/m2 ). 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. Keywords: drying; fabric; image; rate; surface
• STIRRED FLUIDIZED-BED DRYER OF REGENERATED ION EXCHANGER PARTICLES by Pěnička, Michal; Hoffman, Pavel; Fořt, Ivan (2014) - 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; drying; fig; layer; particles; period; point; process; rate; surface
• THE OPERATING LOAD OF A DISINTEGRATION MACHINE by Beniak, Juraj; Križan, Peter; Matúš, Miloš; Kováčová, Monika (2014) - Figures 3 and 4 show the relation of the measured values of torque Mk to the surface area of the sam- ple material Sm. For various surface areas of the cross-sections, the following torque measurements were taken [6,7,8]: • Mk1,1, Mk1,2, . . . Keywords: area; material; sample; surface; wedge
• SEMICLASSICAL ASYMPTOTICS OF EIGENVALUES FOR NON-SELFADJOINT OPERATORS AND QUANTIZATION CONDITIONS ON RIEMANN SURFACES by Esina, Anna I.; Shafarevich, Andrei I. (2014) - [13] A. A. Shkalikov. doi: 10.4213/im399 [16] A. V. D’yachenko, A. A. Shkalikov. Keywords: equation; graph; operator; spectrum; surface
• SHAPE OF A NUCLEUS GROWING ON STRONGLY CURVED SURFACE OF A NANOFIBER by Sveshnikov, Alexey; Demo, Pavel; Kožíšek, Zdeněk; Tichá, Petra (2014) - 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: nanofiber; nucleation; nucleus; shape; surface
• DEPOSITION CARBON NANOSTRUCTURES BY SURFATRON GENERATED DISCHARGE by Davydova, Marina; Smid, Jiri; Hubicka, Zdenek; Kromka, Alexander (2014) - Keywords: surfatron, carbon nanostructures, microwave plasma, PECVD. However, deposition of carbon nanostructures by SWD is not broadly used. Keywords: carbon; deposition; gas; nanostructures; plasma; surface
• INFLUENCE OF SUBSTRATE THICKNESS ON DIFFUSE COPLANAR SURFACE BARRIER DISCHARGE PROPERTIES by Čech, Jan; Zemánek, Miroslav; Sťahel, Pavel; Dvořáková, Hana; Černák, Mirko (2014) - Ozone synthesis from oxygen in dielectric barrier discharges. This paper presents an investigation of the influence of dielectric barrier thickness on the parameters of the Diffuse Coplanar Surface Barrier Discharge. Keywords: barrier; dcsbd; dielectric; discharge; field; plasma; power; surface; thickness; voltage
• OPERATION MODES AND CHARACTERISTICS OF PLASMA DIPOLE ANTENNA by Bogachev, Nikolay Nikolaevich; Bogdankevich, Irina L.; Gusein-Zade, Namik G.; Sergeychev, Konstantin F. (2015) - Keywords: plasma antenna, surface electromagnetic wave, numerical simulation, operation modes, metal monopole, radiation pattern. Introduction In recent years much plasma antenna research has been done by theoretical, numerical and experimental methods [1–11]. Keywords: antenna; metal; modes; plasma; radiation; surface; wave
• HYDRATION OF PLASMA-TREATED ALUMOSILICATE BINDERS by Šmilauer, Vít; Babchenko, Oleg; Potocký, Štepán; Kromka, Alexander (2014) - Plasma surface treatment is a well-established method for creating hydrophilic surfaces, which play an important role in hydraulic cementitious binders. However, the CNTs on the surface of the cement grains hinder the acceleration period of cement hydration, as is evident if we compare the original OPCH with its CHM counterpart in Figure 4. Keywords: ash; cement; cnts; figure; hydration; plasma; surface; treatment
• CHANGES IN THE SURFACE LAYER OF ROLLED BEARING STEEL by Zemčík, Oskar; Sedlák, Josef; Chladil, Josef (2015) - Various types of roller bearings are made, ranging from the most common ball bearings through tapered, cylindrical, and barrel bearings to special types for specific purposes. Steel for roller bearings 14109.4, 10000×, roller-burnished by a working force of 2500N: (left) a replica at a depth of 0.2mm below the roller-burnished surface; (right) a replica 0.01mm below the roller-burnished surface. Keywords: bearing; burnishing; element; layer; roller; stress; surface
• EXPERIMENTAL EVALUATION OF WEDM MACHINED SURFACE WAVINESS by Mouralova, Katerina; Kovar, Jiri; Houska, Pavel (2016) - 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 ZHR 4150AK hardness tester, series Rockwell by Zwick Roell was used for the measurement of hardness of sample material. Keywords: alloy; machining; parameters; samples; surface; titanium; values; waviness; wedm
• PARTICLE MOTION ON THE SURFACE OF A CONCAVE SOIL-TILLING DISK by Pylypaka, Serhii; Klendii, Mykola; Klendii, Oleksandra (2018) - A mathematical model of soil particle motion on a disk operating element, which rotates about a fixed horizontal axis, has been developed. Conclusion A mathematical model of soil particle motion on a disk operating element, which rotates around a fixed horizontal axis, has been developed. Keywords: angle; disk; disk surface; particle; particle motion; rotation; surface; velocity
• Analysis of Relative Motion between Femoral Head and Acetabular Cup and Advances in Computation of the Wear Factor for the Prosthetic Hip Joint by Calonius, O.; Saikko, V. (2003) - Force track shown with thick line. whereas in the HUT:3, it was 3.8 (elliptical force track). Keywords: brm; contact; cup; force; force track; gait; head; hip; joint; load; motion; pressure; relative; simulator; slide; slide track; sliding; surface; track; vol; wear
• COMPARISON OF ACTUAL GROUND SETTLEMENTS IN TUNNELLING EXCAVATION TO MODEL PREDICTIONS by Saplachidi, Alexandra; Vougioukas, Emmanouil (2018) - Keywords: lifelines; tunnel excavations; ground settlements; data monitoring; finite element method. In CH0+343, an increase of surface settlements which locally reached the point of 25mm was mani- fested. Keywords: ch0 +; excavation; ground; line; rock; section; settlements; support; surface; tunnel
• HYDROPHOBIC IMPREGNATION OF GEOPOLYMER COMPOSITE BY ETHOXYSILANES by Mašek, Zdeněk; Diblikova, Linda (2018) - 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 Solutions C and F were synthesized based on a procedure for the binder of zinc-silicate paint [11]. Keywords: composite; geopolymer; hydrophobic; impregnation; samples; solution; surface; water
• THE CHARACTERIZATION OF ANODIC OXIDE LAYERS ON SELECTED BIO-COMPATIBLE TITANIUM ALLOYS by Krčil, Jan; Mára, Vladimír; Krum, Stanislav; Sobotová, Jana (2018) - Oxide layers on titanium alloy surfaces have an influence on bio-compatibility and corrosion resistance. In order to improve them, properties of oxide layers are examined. Keywords: layer; oxide; roughness; samples; surface; thickness; ti6al4v
• THE INFLUENCE OF CUTTING CONDITIONS ON THE SELECTED PARAMETERS OF THE SURFACE INTEGRITY by Čep, Robert; Malotová, Šárka; Lichovník, Jiří; Hatala, Michal; Legutko, Stanislaw (2018) - 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: conditions; cutting; machining; material; milling; stress; surface
• JOINIG OF MG ALLOY AZ31B BY SELECTED TECHNOLOGIES by Kramár, Tomáš; Vondrouš, Petr; Jáňa, Miroslav; Kupec, Tomáš (2019) - The difficulty of joining Mg alloys is connected with the strong MgO layer, low ductility of the weld metal (WM), a presence of intermetallic phases connected with the hardness increase. With the increase of usage of Mg alloys, there is a high need of a proper method of strong metallurgical joining of Mg alloys, which is an objective of an extensive research in the world. Keywords: alloys; figure; fsw; joint; laser; solder; soldering; surface; welding
• GENERAL MODEL OF RADIATIVE AND CONVECTIVE HEAT TRANSFER IN BUILDINGS: PART II: CONVECTIVE AND RADIATIVE HEAT LOSSES by Ficker, Tomáš (2019) - Keywords: Convective heat transfer, radiative heat transfer, room envelope, heat losses, iterative optimization. Introduction The present paper continues the previous contribution entitled General model of radiative and convective heat transfer in buildings: Part I: Algebraic model of radiative heat transfer [1]. Keywords: ceiling; coefficients; convective; heat; heat transfer; losses; radiative; surface; transfer
• CZECH WW2 CONCRETE FORTIFICATIONS: CORROSION PROCESSES AND REMEDIATION METHOD BASED ON CRYSTALLIZING COATING by Pazderka, Jiří; Reiterman, Pavel (2019) - However, concrete is not perceived as a historical material by the public [4], hence the protection of concrete structures is very complicated. The main problem of concrete structures is the pres- ence of water, because most of the harmful degrada- tion processes are closely related to that Keywords: air; building; bunker; concrete; czech; figure; materials; measurement; moisture; protection; samples; structures; surface; water
• Multifractal Image Analysis of Electrostatic Surface Microdischarges by Ficker, T. (2004) - Many followers appeared in the field of computer simula- tions of discharge channel structures [12–18]. An abundant rami- fication, when the branches thoroughly fill the surface, leads to a geometrical structure whose dimension D will approach that of a plane (D � 2). Keywords: phys; surface; vol; � �
• EXTERNAL ROLLING OF A POLYGON ON CLOSED CURVILINEAR PROFILE by Pylypaka, Serhii F.; Klendii, Mykola B.; Trokhaniak, Viktor I.; Kresan, Tetiana A.; Hryshchenko, Iryna Y.; Pastushenko, Andrii S. (2021) - Keywords: Surface tillage, helical surface, developable helicoid, approach angle, flight development, movement pattern. Five types of ruled helical surfaces for helical conveyers, support anchors and screws. Keywords: angle; depth; disk; fig; movement; radius; soil; surface; tillage; unit
• ANALYSES OF WASTE PRODUCTS OBTAINED BY LASER CUTTING OF AW-3103 ALUMINIUM ALLOY by Loskot, Jan; Zubko, Maciej; Janikowski, Zbigniew (2020) - 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: alloy; aluminium; cutting; figure; laser; laser cutting; material; particles; powder; surface; tube; waste
• APPLICATION OF RULED SURFACES IN FREEFORM AND GEAR METROLOGY by Linkeová, Ivana; Zelený, Vít (2021) - Smart gear measurement standard In gear metrology, precise gear measurement standards of various designs and purposes are developed, man- ufactured and calibrated. Spur (magenta) and helical (cyan) gear included in Smart gear measurement standard. Keywords: freeform; gear; helix; involute; paraboloid; standard; surface
• Triangulation of 3D Surfaces Recovered from STL Grids by Rypl, D.; Bittnar, Z. (2004) - An important class of 3D surfaces is the group of surfaces described by the stereolithography (STL) file format. This format approximates 3D surfaces of a solid model with ori- ented triangles (facets) of different size and shape (aspect ratio) in order to achieve a smooth enough representation suitable for industrial processing of 3D parts using stereo- lithography machines. Keywords: bg edge; bg nodes; limit; stl; surface; surface bg
• TESTING THE SUITABILITY OF THE EXTRUDED POLYSTYRENE (STYRODUR) APPLICATION IN THE TRACK SUBSTRUCTURE by Ižvolt, Libor; Dobeš, Peter; Mečár, Martin (2020) - 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: ballast; deformation; deformation resistance; layers; sub; subgrade; subgrade surface; surface; xps
• Assessment of the effectiveness of lubrication of Ti-6Al-4V titanium alloy sheets using radial basis function neural networks by Trzepieciński, Tomasz; Szpunar, Marcin (2021) - Kinematic viscosity ηk = 0 was assumed for dry friction conditions. Effect of nominal pressure on the variation in the functional volume parameters Vmc, Vvc, Vmp and Vvv under dry friction conditions. bricated conditions causes an unfavourable reduction in the volume of the oil pockets (Fig. 4e). Keywords: coefficient; conditions; friction; metal; network; oil; pressure; rbf; sheet; surface; titanium; value
• Metal Fatigue Features by Brož, P. (2006) - On a microscopic scale, fatigue crack growth is often an ir- regular process. Unless expressed otherwise, it is ensues from any reference to fatigue crack growth that the crack has achieved the macrocrack period. Keywords: crack; czech; fatigue; fig; fracture; growth; material; slip; stress; surface; � �
• Femtosecond laser processing of advanced technical materials by Primus, Tomáš; Novák, Martin; Zeman, Pavel; Holešovský, František (2023) - In spite of this fact, the volume ablation rate parameter could be useful for describing processes that need higher material ablation without regard to energy consumption. Accumulation effects in laser ablation of metals with high-repetition-rate lasers. Keywords: ablation; figure; hatching; laser; materials; rate; removal; repetition; roughness; scanning; steel; structure; surface; ti6al4v
• Stone Topography – Useful Tool in Monuments Restoration Process by Cihla, Michal; Kovářová, Kateřina; Malát, Richard; Valach, Jaroslav; Kovářová, Kateřina (2022) - The aim of this analysis is to identify tool traces, reconstruct the tools that produced them and outline the stone working process. Database of traces and reconstruction of historical stone tools. Keywords: cihla; prague; stone; stonemason; surface; tool; topography; traces
• Semi-analytical approach-based studies of the squeeze film lubrication between rough porous annular discs: Rabinowitsch fluid model by Rahul, Amit Kumar; Singh, Manoj Kumar; Tiwari, Ravi; Paul, Sourabh; Rao, Pentyala Srinivasa; Biswas, Rohahn (2023) - We can learn much more about porous roughness annular discs and unlock their potential to solve challenging problems across a range of industries by incorporating these research directions. Squeeze film behaviour in porous annular discs lubricated with magnetic fluid. Keywords: discs; film; fluid; roughness; squeeze; surface
• Preparation of Thin Metal Layers on Polymers by Siegel, J.; Kotál, V. (2007) - The surface energy of plasma treated polymers can easily be examined by mea- suring the contact angles. A crucial role in preparing metal layers on polymers is played by the interface properties between substrate and deposited metal. Keywords: fig; pet; plasma; surface
• Effect of surface area on the wear properties of Al-based automotive alloy and the role of Si at eutectic level by Kaiser, Mohammad Salim; Hossain, Al-Kabir (2024) - Thus, for a longer engine life, alloys with higher wear properties are required. A microstructural study confirms a lower abrasive wear with a minor plastic deformation on the worn surfaces of Si added alloy and wear with higher contact surface. Keywords: alloy; coefficient; contact; figure; friction; materials; properties; sliding; specimens; surface; wear
• Acoustic Radiation Patterns of Different Polygon Piston Surfaces by Yusuf, Taofeek Ayotunde; Aodu, Sheriff Abiodun; Alabi, Abeeb Opeyemi (2024) - Meanwhile, acoustic pistons with flat surfaces such as polygons have more prospects in providing a more compact transducer structure [20]. The beam pattern of polygonal piston surfaces of equal surface area with a circular piston of different diameters. Keywords: beam; circular; equation; figure; k sin; piston; sec; sin θ; surface; tan

• The Amount of Regenerated Heat Inside the Regenerator of a Stirling Engine by Škorpík, J. (2008) - If the thermodynamic processes are iso- thermal on the hot side and the cold side, then the enthalpy of the working gas does not change (� �I IH C( ) ( )� � �� �0 0) and we can using equation (13). (12) The amount of regenerated heat can be computed exactly if the change enthalpy of the working gas on the hot side and the cold side � �I IH C( ) ( )� � �� 0 is known (more about this problem in [3], [4]). Keywords: engine; heat; regenerator; � q; � �
• Decomposition of Intumescent Coatings: Comparison between a Numerical Method and Experimental Results by Mesquita, L. M. R.; Piloto, P. A. G.; Vaz, M. A. P.; Pinto, T. M. G. (2009) - The gas mass flux, � ��mg, is calculated accordingly to Darcy’s law and it is assumed that the gases present in the in- tumescent material behave as a perfect gas. 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. Keywords: fig; heat; mass; steel; � k; � m; � �
• Impacts of New EU and Czech Environmental Legislation on Heat and Electricity Prices of Combined Heat and Power Sources in the Czech Republic by Vecka, J. (2011) - Table 2: Pollution fees — current and proposed in CZK per ton Pollutant Dust SOx NOx VOC Current 3 000 1 000 800 2 000 2012–2016 4 200 1 350 1 100 2 700 2017 6 300 2 100 1 700 4 200 2018 8 400 2 800 2 200 5 600 2019 10 500 3 500 2 800 7 000 2020 12 600 4 200 3 300 8 400 2021 14 700 4 900 3 900 9 800 2022 and further 29 400 9 800 7 800 19 600 3 Future of heat prices in the Czech Republic after 2012 In the respect of emission trading, I have focused on the third exception (free allocation of allowances for district heating), which is crucial for my eco- nomic model. In the case of heat prices, there will 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; directive; emission; free; heat; new; price
• Heat Exchangers for Condensation and Evaporation Applications Operating in a Low Pressure Atmosphere by Kracík, Petr; Pospíšil, Jiří; Šnajdárek, Ladislav (2012) - The heat transfer red through the copper tube wall: Q̇S = Q̇B +ΔQ̇56 = Q̇V −ΔQ̇12 [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: coefficient; heat; pressure; transfer; tube
• Heat Transfer Analysis of a Diesel Engine Head by Diviš, M.; Tichánek, R.; Španiel, M. (2003) - 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: contact; cylinder; fig; head; heat; transfer; valve
• WELDING OF NITINOL BY SELECTED TECHNOLOGIES by Kramár, Tomáš; Tauer, Jan; Vondrouš, Petr (2019) - Material and methods A homogeneous welding without a filler wire (i.e., autogenous) of NiTi wires using selected welding tech- nologies was done. The problem of laser welding is the variation of absorptivity, especially for small wires, so the surface state of the wire is important for the uniformity of results. Keywords: figure; heat; niti; properties; results; shielding; welding; wire
• THE CHARACTERISTICS OF Al-Si COATING ON STEEL 22MnB5 DEPENDING ON THE HEAT TREATMENT by Kolaříková, Marie; Chotěborský, Rostislav; Hromasová, Monika; Linda, Miloslav (2019) - [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. The Hysitron TI 950 TriboIndenter™ nanoin- dentation system was used to analyse the mechanical properties of coatings, such as reduced elastic modu- lus and indentation hardness (HIT, according to ISO 14577-1). Keywords: coating; figure; heat; phase; steel; treatment
• An Investigation of corrosion of friction welded and post-weld heat-treated AA6061/SiC/graphite hybrid composites by Senthilkumar, Jadamuni; Kumar, Pavan S. M.; Balasubramanian, Manickam (2021) - 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: alloy; aluminium; composites; corrosion; friction; heat; joints; sta; weld
• Structural Stress Analysis of an Engine Cylinder Head by Tichánek, R.; Španiel, M.; Diviš, M. (2005) - Keywords: structural stress analysis, FEM, internal-combustion engine. cylinder head assembly lies on the cylinder, and it is fixed with six pre-pressed bolt connections. 3 The dependency of the heat- -transfer coefficient on surface temperature is shown in Fig. Keywords: cylinder; fig; head; heat; transfer; valve
• Theoretical and experimental study of water vapour condensation with high content of non-condensable gas in a vertical tube by Krempaský, Jakub; Havlík, Jan; Dlouhý, Tomáš (2022) - 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: air; condensation; condenser; film; heat; htc; mass; mixture; transfer; vapour; water; water vapour

• Shape Synthesis in Mechanical Design by Teng, C. P.; Bai, S.; Angeles, J. (2007) - 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. k� �( , )� � and � � � � �k Keywords: curve �; design; p �; q �; tan �; � b; � c; � k; � n; � pk; � �
• Parameter-Invariant Hierarchical Exclusive Alphabet Design for 2-WRC with HDF Strategy by Uřičář, T. (2010) - Significant capacity degradation is caused by channel parametrization, which highlights the importance of HXA design resistant to channel parametrization. The proper design of HXA is important, especially in the case of parametric channels, where channel parametrization (e.g. phase rotation) can violate the exclusive property of hierarchical symbols (as seen by the relay), resulting in significant capacity degradation. Keywords: capacity; channel; design; fig; hxa; relay; signal; space
• Application of Morphological Analysis Methodology in Architectural Design by Prokopska, A. (2001) - 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. Lull’s art as the primary idea of morphological analysis, has been acknowledged as to an element corresponding with the specificity of architectural design. Keywords: analysis; design; features; fig; method; methodology; process; solutions; technical
• COMPUTATIONAL AERODYNAMIC OPTIMIZATION OF LOW-SPEED WING by Lahuta, Martin; Pátek, Zdeněk; Szöllös, András (2014) - 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. 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: aerodynamic; archive; design; evolution; new; optimization; population; vector; wing
• TOWARDS EVOLUTIONARY DESIGN OF COMPLEX SYSTEMS INSPIRED BY NATURE by Vítku, Jaroslav; Nahodil, Pavel (2014) - Then, examples of agent architectures represented as hybrid networks are presented. Sim- ilarly to the neuro-evolutionary design of ANNs [14], the topology of agent architecture is optimized by modifying the connection weights between nodes. Keywords: agent; architecture; design; learning; module; motivation; prosperity; reward; state; value
• Evolved Representation and Computational Creativity by Ismail, Ashraf Fouad Hafez (2001) - Keywords: computational creativity, evolved representation, design processes, evolutionary algorithms, search space. A simple hill climbing inside the focus-area, on the other hand, would be entirely convergent, the value for ‘explora- 44 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 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: design; example; focus; genes; genotype; process; representation; search; search space; space
• Rapid Prediction of Configuration Aerodynamics in the ConceptualDesign Phase by Munro, C.; Krus, P. (2001) - Advances in flight control certainly allow for a wide variation in vehicle design that would not otherwise be possible. 2: Influence of design stage on costs and the ability to in- fluence the design Fig. 3: Conceptual design process with physical and virtual modelling elements external configuration) a few may be selected on the basis of initial empirical analysis to proceed to more detailed model- ling and experimental investigation. Keywords: aerodynamic; cost; design; fig; flight; testing; tunnel; water
• Improving Aircraft Design Robustness with Scenario Methods by Strohmayer, A. (2001) - Keywords: aircraft design, scenario methods, requirements, design evaluation, technology strategy. 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; evaluation; factor; future; market; methods; process; requirements; scenario
• Credibility of Design Procedures by Marková, J.; Holický, M. (2001) - The following relationship between the average crack width wm and the characteristic crack width wk can be considered � �w w u vk m p� �1 , (10) where v is a coefficient of variation expressing up to 40 % variability of crack width and up is an upper fractile of the standardised normal variable for probability p based on the assumption of normal distribution of crack widths. 3 Reliability In accordance with traditional reliability theory, a struc- ture can be considered as reliable if the following condition is satisfied P Pf t� , or � �� t (4) where the probability of failure Pf is given as � �� � � � � P P Keywords: crack; credibility; design; limit; reliability; width; � �
• Reliability of Concrete Elements Designed for Alternative Load Combinations Provided in Eurocodes by Holický, M.; Marková, J. (2003) - [..g., 8, 9] to develop comprehensive background materials enabling national decisions concerning load combinations and partial factors to be applied in accordance with the present version ofEN 1990 The lowest reliability level is provided by load combination C, allowed in EN 1990 Keywords: alternative; beam; combination; concrete; design; load; reliability
• Risk Assessment in Advanced Engineering Design by Holický, M. (2003) - To reduce this drawback, methods of risk analysis and assessment have recently been developed [5, 6l and applied (e.g., [6]). trig. 3 shows a simplified network extracted from influence_diagrams developed for risk analysis of buildings under a fire design situation Keywords: analysis; decision; design; engineering; fig; fire; hazard; node; probability; risk; situation; utility
• Understanding the Order of Engineering Design Research by Horváth, I. (2003) - Although it was found to be fundamentally empirical in nature, engineering design research has made design knowledge more theoretical by structural reasoning, abstraction and generalizarion, and logical processing t261. Keyuonls: engineefing design research,, leleologl of engineeilng design, natural slreant of knowledge, research categoties, research' d ornains, re search trni e ctories. Keywords: design; design knowledge; design research; development; domain; engineering; engineering design; knowledge; methods; order; processes; product; reasoning; research; research trajectories; science; studies; theory; trajectories; vol
• Die Design for Near-Net Shape Forging by Čermák, J.; Gráf, G. (2003) - l: Possible changes of forging shape. o First - the manufacturing technique, i.e., forging methods, number of forging steps, etc, e Second - metal flow optimisation according to the actual type of forging and forging sequence (preform stage or final stage, etc.). Keywords: billet; cavity; costs; design; die; forging; machining; material; shape; space; volume
• Design Evaluation: Decomposition and State-space Analysis by Green, G. (2003) - 2 Decomposition of design Decomposition of design is well established in practice as a means of trying to simplifi the complexity of design activity [4]. Only through computer imple- mentation will the desired time reduction be achieved rvhilst being able to process data associated with a large number of design concepts and their associated set ofdesign characteris- tics. Keywords: approach; concept; decomposition; design; evaluation; probability; process; state
• Modal Logic - a Tool for Design Process Formalisation by Jelínek, I. (2003) - Let us introduce the frame of worlds [1] (structure [14]) formally as an ordered couple: � �F W R� , , where W set of worlds, R R W W� � , binary relation (accessibility relation). The model (P-model) within the frame � �F W R� , will be then called a triad: � �M W R V� , , where V: P � 2W. V maps each atomic formula p P� to the subset � �V p W� and therefore represents all worlds w W� in which p is valid. Keywords: design; logic; modal; � �
• Implementation of Component-based Simulation Support Tool for Conceptual Design by Brandejský, T. (2004) - � � � �� � � � � �� �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) The first case can be described by transformations (14) – for unary operator and (15) for binary: � � � �� � � � � �� � � � � �� �op P X G R op P X R R G R, , _ , _� � (14) � � � � � �� � � � � � � �� � � � � �� �op P X P X G R op P X P X R R G R1 1 2 2 1 1 2 2, , , , _ , _� � (15) Keywords: component; design; simulation; tool; type; uncertainty; � op; � �
• Developing a Conceptual Design Engineering Toolbox and its Tools by Vroom, R. W.; van Breemen, E. J. J.; van der Vegte, W. F. (2004) - � Phase 2: Conceptual design (Product design phase). [3] Roozenburg N. F. M., Eekels J.: Product design: fundamen- tals and methods. Keywords: design; designer; det; engineering; knowledge; modelling; process; product; support; tools; use; work
• An Integrated Decision Making Model for Evaluation of Concept Design by Green, G.; Mamtani, G. (2004) - 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: concepts; design; evaluation; fuzzy
• STRESS ANALYSIS AND TOPOLOGY OPTIMIZATION OF A CHAIN BUCKET ELEVATOR USING ANSYS by Yin, Edward; Seckley, Emmanuel M.; Asiedu, Evans Kesse; Cobbinah, Stephen (2021) - [9] designed a combi- nation of a belt conveyor and chain bucket elevator, which is controlled automatically by a micro controller with a weight sensor attached to it for packaging. Metallographic failure analysis on bucket elevator conveyor chain links. Keywords: analysis; beam; bucket; bucket elevator; chain; chain bucket; design; elevator; failure; optimization; pawl; spring; stress
• Elicitation of Preference Structure in Engineering Design by Tan, J. K. (2005) - 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: criteria; decision; design; maker; preference; structure
• KBE Application for the Design and Manufacture of HSM Fixtures by Ríos, J.; Jiménez, J. V.; Pérez, J.; Vizán, A.; Menéndez, J. L.; Más, F. (2005) - 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. Automating the design of fixtures As stated previously, automation of fixture design has been pursued for several years. Keywords: application; design; development; fixture; icad; kbe; knowledge; machining; process; vacuum
• Constraint-Aided Product Design by Mullineux, G.; Hicks, B.; Medland, T. (2005) - 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: approach; constraint; design; fig; knowledge; process; product; rules
• Ontologies and Formation Spaces for Conceptual ReDesign of Systems by Bíla, J.; Tlapák, M. (2005) - One possible functional structure is described by the following expression x: x � FAct(PNEU�Princ1(Trans�Princ2(ChCarr AND ChValV AND Transms AND ChBeh) AND Contr�Princ2(Analog) AND Cnstr�Princ2(Shape) AND ME�Princ1(Agg�Princ2(Accum) AND Trans�Princ2(ChCarrV AND ChBeh) AND Contr�Princ2(Analog) AND R-Eff�Princ2(Bearing) AND Cnstr�Princ2(Separ AND Fix AND Shape) ) The field which promises the necessary improvements in modelling the semantics is the field of ontologies. Keywords: conceptual; design; knowledge; language; ontologies; ontology; pneu; principles; state; systems
• Reliability Risk Evaluation during the Conceptual Design Phase by Mamtani, G.; Green, G. (2006) - 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: concept; design; function; method; reliability; seat
• Determination of fan design parameters for light-sport aircraft by Klesa, Jan (2022) - Dependence of fan pressure ratio at flight speed v0 = 0 km h−1 on fan diameter and nozzle con- traction ratio A1/A3. Dependence of fan pressure ratio at flight speed v0 = 300 km h−1 on fan diameter and nozzle contraction ratio A1/A3. Keywords: design; fan; figure; flight; nozzle; parameters; ratio; velocity
• Recommended procedure for headroom design according to geometric parameters of building structures by Veselá, Linda (2022) - To comply with standard or legal requirements for minimum headroom, the design headroom shall be determined as follows: hsv,pd ≥ hsv,dop > hsv,norm, (5) where hsv,pd is the design headroom, hsv,dop is the cal- culated recommended minimum headroom, hsv,norm is the minimum headroom according to a technical standard or regulation. Keywords: Headroom, geometric accuracy, limit deviation, geometric accuracy deviation. Keywords: accuracy; ceiling; design; deviations; headroom; minimum
• Utilising Pareto efficiency and RSM to adjust binder content in clay stabilisation for Yttre Ringvägen, Malmö by Lindh, Per; Lemenkova, Polina (2023) - 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 % The paper highlights the major opportunities and challenges of engineering statistics as a cross-cutting research direction for the issues of civil engineering. Despite widespread applications in civil engineering and extensive existing research, there are still some challenges in soil stabilisation, including the following: (1.) Keywords: analysis; binders; ccd; cement; civil; clay; content; design; effects; engineering; figure; geotechnical; lime; methods; mixture; opc; results; soil; soil stabilisation; stabilisation; strength; water
• The application of 3D printing technology in the design of sandwich panels by Uher, Ondřej; Král, Michal; Cabrnoch, Bohuslav; Kruml, Josef (2024) - In terms of implementation, it is possible to distinguish between two basic categories of inserts – hot bonded inserts and potted inserts. The subject of this paper are potted inserts. Keywords: design; figure; inserts; printing; sandwich; test
• Ergonomic Optimization of a Manufacturing System Work Cell in a Virtual Environment by Caputo, F.; Gironimo, G. Di; Marzano, A. (2006) - PEI � � �I I I1 2 3 (1) At present various commercial systems are avail- able for ergonomic analysis of human posture and workplace design. Keywords: analysis; body; design; ergonomics; human; method; pei; work; � �
• Design of Carbon Composite Driveshaft for Ultralight Aircraft Propulsion System by Poul, R.; Růžička, P.; Hanus, . D.; Blahouš, K. (2006) - Shaft version two did not take the need of low torsional stiffness into account. Following layups are designed for shafts version 2 and 3. Keywords: composite; design; failure; shaft; version; � �
• Flying Wings. A New Paradigm for Civil Aviation? by Martinez-Val, R. (2007) - 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: aircraft; airplanes; aviation; body; cabin; cruise; design; fig; flying; fuel; lift; range; size; vol; wing; � �
• Investigation of the impact of product thickness and strain on cold forging processes by Nazal, Samya A.; Nasser, Mohamed A.; Hanon, Muammel M.; Ameen, Hani A. (2024) - This study investigates the impact of sheet metal thickness and strain generated on a cold forging process. While previous studies have explored various as- pects of cold forging, such as die design, deformation characteristics of specific materials, and the effects of anisotropic work-hardening, the unique contribution of this study lies in its exploration of the interplay between sheet metal thickness and strain induced in cold forging procedures. Keywords: design; die; figure; forging; metal; process; product; sheet; strain; thickness
• 3U CubeSat mechanical design and subsystems by Karkun, Mohammad Suhel (2025) - Thermal management For 3U CubeSat, thermal management is crucial to keeping payloads and onboard electronics at the ideal operating temperature. 3U CubeSat rails. Keywords: communication; components; control; cubesat; deployment; design; figure; launch; mission; power; rails; space; subsystems

• Analytical and numerical analysis of filament-wound toroidal pressure vessel loaded by internal pressure and temperature field by Padovec, Zdeněk (2025) - Analysis and optimization of junction between cylindrical part and end dome of filament wound pressure vessels using data driven evolutionary algorithms. Keywords: Toroidal pressure vessel, filament winding, stress analysis, classic lamination theory, FEM. Keywords: analysis; angle; figure; meridian; mpa; pressure; radius; stress; toroidal; winding
• Change of Pressing Chamber Conicalness at Briquetting Process in Briquetting Machine Pressing Chamber by Križan, Peter; Matúš, Miloš; Kers, Jaan; Vukelić, Djordje (2012) - 5 Conclusion The main aim of this paper has been to present the results of our experiment to detect the impact of the conical shape of pressing chambers. Some holding time while the pressed briquette is under pressure is necessary in order to eliminate pressing expansion. Keywords: briquette; chamber; conical; parameters; pressing; pressure
• Influence of Various Process Parameters on the Density of Sintered Aluminium Alloys by Laska, Mateusz; Kazior, Jan (2012) - 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: Sintered density to theoretical density ratio as a function of compaction pressure for: (A) EA231, (B) EA321, (C) EA431 The negative values of the densification factor curves of the EA231 and EA321 powders therefore correspond with the observed changes in the geom- etry of the samples and the swelling of the sintered parts. Keywords: compaction; density; pressure; sintering
• Holding Pressure and Its Influence on Quality in PIM Technology by Petera, Pavel (2012) - Keywords: PIM, holding pressure, phase separation. Measurements were made using various holding pressure values. Keywords: density; holding; powder; pressure
• Filling and Recycling Apparatus of a Cyclotron Target with Enriched Krypton for Production of Radiopharmaceuticals by Vognar, M.; Fišer, M.; Šimáně, Č.; Chvátil, D. (2001) - 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) 37Rb81 reaction. Keywords: apparatus; container; gas; heating; pressure; target; � �
• THE EFFECT OF ADDING HYDROGEN ON THE PERFORMANCE AND THE CYCLIC VARIABILITY OF A SPARK IGNITION ENGINE POWERED BY NATURAL GAS by Chríbik, Andrej; Polóni, Marián; Lach, Ján; Ragan, Branislav (2014) - As can be seen, with an increasing content of hydrogen the mass lower heating value increases, while the fuel density de- creases, so that the final fuel energy density decreases as the proportion of hydrogen increases. As the proportion of hydrogen increases, the maxi- mum pressure value also increases, and the position of this pressure is lifted closer to TDC, or, more pre- cisely, before TDC, at an unchanged angle of ignition advance. Keywords: gas; hydrogen; ignition; increases; mixture; pressure
• STABILIZATION TIME AS AN IMPORTANT PARAMETER AFTER DENSIFICATION OF SOLID BIOFUELS by Križan, Peter; Matúš, Miloš; Beniak, Juraj; Kováčová, Monika (2014) - In the ex- periment we can distinguish between two basic types of briquette dilatation: Dilatation with decreasing briquette density — when the diameter and the length of the briquette increase and the weight of the briquette decreases (associated effects are crack formation, material fragmentation and briquette decomposition); Dilatation with increasing briquette density — when the diameter and length of the briquette de- crease and the weight of the briquette increases (an associated effect is briquette shrinkage and in- creased hardness); Both of these types of dilatation effects are signifi- cantly influenced by the type of pressed material, the material moisture, the input fraction size, the applied compacting pressure, the applied pressing tempera- ture during pressing, and the duration of the briquette holding time. It is very important to consider the stabilization time or briquette dilatation mainly due to the changes in briquette density. Keywords: briquette; compacting; density; dilatation; pressure; stabilization
• GALACTIC CENTER MINISPIRAL: INTERACTION MODES OF NEUTRON STARS by Zajacek, Michal; Karas, Vladimir; Kunneriath, Devaky (2015) - Keywords: galaxy center; individual objects; Sagittarius A; neutron stars. The same order is ex- pected for neutron stars based on multiwavelength statistical studies [11]. Keywords: center; distribution; field; figure; galactic; interaction; interaction modes; minispiral; modes; neutron; neutron stars; pressure; pulsar; radius; stars
• ABOUT THE UNIFORMITY AND THE STABILITY OF A VOLUME DISCHARGE IN HELIUM IN NEAR-ATMOSPHERIC PRESSURE by Kurbanismailov, Vali Suliymanovich; Omarov, Omar Alievich; Ragimkhanov, Gadjimirza Balaglanovich; Aliverdiev, Abutrab Alexandrovich (2015) - Keywords: discharge formation; volume discharge; streamer; discharge plasma. Introduction One of the applications of volume discharges in inert gases is gas laser pumping. Keywords: current; discharge; gas; phys; plasma; pressure; voltage; volume
• STUDY OF L–H TRANSITION AND PEDESTAL WIDTH BASED ON TWO-FIELD BIFURCATION AND FIXED POINT CONCEPTS by Chatthong, Boonyarit; Onjun, Thawatchai (2015) - [ 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: density; figure; particle; pedestal; plasma; pressure; transition; transport; value
• TREATMENT OF NATURAL GAS BY ADSORPTION OF CO2 by Hádková, Kristýna; Tekáč, Viktor; Ciahotný, Karel; Beňo, Zdeněk; Vrbová, Veronika (2015) - 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: carbon; co2; desorption; gas; pressure; sieve
• RELATIONSHIP BETWEEN COMPACTING PRESSURE AND CONDITIONS IN PRESSING CHAMBER DURING BIOMASS PRESSING by Križan, Peter; Matúš, Miloš; Beniak, Juraj (2016) - Cross-view of experimental pressing stend (1—pressing chamber; 2—pressing chamber flange; 3—start-up chamber; 4—counter pressure plug; 5— pressing piston; 6—pressed material). Dependence of axial pressure Pa on length of pressing chamber Lp and friction coefficient µ (at constant pressing chamber diameter dp = 20mm) Keywords: axis; briquette; chamber; length; pressing; pressure
• ANALYSIS OF MECHANICAL PROPERTIES OF HYDROTHERMALLY CURED HIGH STRENGTH CEMENT MATRIX FOR TEXTILE REINFORCED CONCRETE by Holčapek, Ondřej; Vogel, Filip; Konvalinka, Petr (2015) - 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: cement; concrete; conditions; curing; hydrothermal; pressure; properties; strength
• Partial Discharge Measurements in HV Rotating Machines in Dependence on Pressure of Coolant by Kršňák, I.; Kolcunová, I. (2002) - For the electro insulating purposes of gases in high voltage equipments it is always valid that � � � �pd pd� min. For this reason we can consider only the “right wing” of Paschen’s curve. (4) If the free path of particle � � �I , where �I is the free path of a particle which at a certain level of strength E gains the ionisation energy WI, from (1) it is possible to write �I Keywords: discharge; gas; ionisation; path; pressure; voltage
• A Comparison of Acoustic Field Measurement by a Microphone and by an Optical Interferometric Probe by Bálek, R.; Šlegrová, Z. (2002) - 1: System of coordinates The integral phase change (5) is in terms of plane waves equal to: � � � � � �� �� � � � �z z A A z A At kL p 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. This holds in terms of the Raman-Nath diffraction regime, which is restricted by the Klein-Cook parameter Q and the Raman-Nath parameter � [1] within the bounds Q � 1 (1) and Q � � � 1. (2) The Q and � are defined as follows: Q L n � 2 0 �� �� (3) � � � � � 2 L n , (4) where � [m] is the laser light wavelength in a vacuum, � [m] is the acoustic wavelength in the interaction medium, n0 [-] is the refractive index in a medium without ultrasound, �n [-] is the amplitude of the refractive index changes and L Keywords: frequency; laser; microphone; pressure; signal; � �
• USE OF DISC SPRINGS IN A PELLET FUEL MACHINE FOR PRESSURE REGULATION AND PREVENTION OF DAMAGE by Çelik, İsmet; Güneş, Ebubekir Can (2017) - Keywords: biomass pellet; pellet machine; disc spring; Almen–Laszlo; FEA; pelletizing pressure. [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. doi:10.1016/j.biombioe.2005.01.004 Keywords: biomass; die; disc; force; fuel; moisture; pellet; pelletizing; pressure; springs; stress
• DESIGN OF PARTICULATE MATERIAL COMPACTOR ROLLS DIAMETER by Peciar, Peter; Macho, Oliver; Eckert, Maroš; Fekete, Roman; Kotora, Peter; Juriga, Martin; Kabát, Juraj; Gabrišová, Ľudmila; Peciar, Marián (2017) - Keywords: particulate material; compaction; compactor; rolls diameter; experimental measurements; fertilizer. Compaction of particulate material. Keywords: angle; compactor; material; nip; pressure; rolls; stress
• Measurement of Moisture Storage Parameters of Building Materials by Jiřičková, M.; Černý, R.; Rovnaníková, P. (2003) - On the other hand, measur€menrs of moisture retention curves for building materials are still relatively rare (e.g., t3l, t4l), in contrast to the numerous measurements on soils (see, e.g., [5] for an overuiew). However, in many building-physics laboratories only the hygroscopic parts of moisture storage functions - the sorption isotherms - are commonly measured. Keywords: building; calcium; fig; material; moisture; parameters; pressure; retention; silicate; storage
• Aerodynamic Analysis of Turboprop Engine Air Intake by Chudý, P.; Fiľakovský, K.; Friedl, J. (2004) - � Original air intake, � Air intake +10 %, � Air intake � 10%, � Air intake with prismatic insert, � Optimised air intake. � SST 53.77 255.79 309.56 4.757 Insert 63.13 240.23 303.36 3.805 �10 % 49.97 237.02 286.99 4.743 +10 % 45.40 231.08 276.48 5.090 Optimized 127.30 223.53 350.83 1.756 Table 1: Summary of results Fig. 8: Contours of static pressure (relative to the reference pres- sure), original air intake, k-e turbulence model Fig. 9: Streamlines in internal sections, original air intake, k-� turbulence model 5 Comparison with experiment The experiment was performed by Walter a.s. in a static test room for engines [8]. Keywords: air; air intake; fig; geometry; intake; pressure
• Influence of Matric Suction on the Shear Strength Behaviour of Unsaturated Sand by Farouk, A.; Lamboj, L.; Kos, J. (2004) - In addition, many researchers have presented their re- sults, when conducting constant water content triaxial tests (CW) on unsaturated soils, without analyzing the change of matric suction during these tests. Therefore, the decision was taken to study the shear strength behaviour of unsaturated sand using the CW triaxial test method with measurements of matric suction during the shearing stage. Keywords: matric; matric suction; pressure; samples; sand; suction; water
• Marine diesel engines operating cycle simulation for diagnostics issues by Minchev, Dmytro S.; Varbanets, Roman A.; Alexandrovskaya, Nadiya I.; Pisintsaly, Ludmila V. (2021) - 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: cylinder; diesel; engine; exhaust; fuel; marine; mathematical; pressure; simulation; valve
• EFFECTS OF DESIGN PARAMETERS ON STATIC EQUIVALENT STRESS OF RADIAL ROLLING BEARINGS by Bozca, Mehmet (2021) - Point contact results in a con- tact pressure and contact stress between two spherical surfaces. Line contact results in a contact pressure and contact stress between two cylindrical surfaces. Keywords: ball; bearing; contact; element; pressure; results; roller; stress
• Performance characteristics of Hopkinson’s set-up pneumatic launcher by Sobczyk, Kamil; Kruszka, Leopold; Chmielewski, Ryszard; Rekucki, Ryszard (2021) - The small-diameter pneumatic launcher is an im- portant element of the stationary test stand called the split Hopkinson pressure bar SHPB Testing of hybrid nickel-polyurethane foams at high strain-rates using Hopkinson bar and digital image correlation. Keywords: bar; figure; hopkinson; impact; launcher; pressure; projectile; sample; strain
• Effect of membrane separation process conditions on the recovery of syngas components by Seghman, Petr; Krátký, Lukáš; Jirout, Tomáš (2022) - 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: co2; component; mol; permeate; pressure; recovery; separation
• Problems with reinforced concrete industrial floors with regard to subsoil swelling by Pruška, Jan; Šedivý, Miroslav; Anderle, Vojtěch (2024) - In the pres- ence of swelling soils in the subsoil, the floors can be shifted upwards by centimeters and open cracks may form after the work has been carried out. Direct measurement of swelling soils – multiple methods are used here and generally require the use of special equipment. Keywords: concrete; content; floors; layer; moisture; prediction; pressure; soil; subsoil; swelling; thickness
• Design and Validation of a Probe for Spatially and Temporally Resolved Measurements of Vorticity and Strain Rates in Compressible Turbulence Interactions by Xanthos, S.; Gong, M.; Andreopoulos, Y. (2007) - k p � � � � � � � � � � � � � � � � 0 2 , where Ui is the instantaneous velocity component, i �1 2, or 3 and U U U U Uk k � � �1 2 2 2 3 2. The density variation across the sensing area has also been estimated from the � p p obtained above and the measured variation of total temperature T0 through the un- certainty propagation formula: � � �� �0 2 0 2 1 2 � � � � � � � � � � � � � � � �� � � � �� p p T TT . Keywords: measurements; pressure; probe; shock; u u; velocity; vorticity; � u; � �

• Development of a Compact Matrix Converter by Bauer, J. (2009) - Keywords: Matrix converter, direct frequency converter, filter design. Matrix converters belong to the category of direct frequency converters. Keywords: board; converter; fig; filter; frequency; matrix; power; switching
• A New Buck-Boost Converter for a Hybrid-Electric Drive Stand by Mašek, P. (2009) - /SVE /TUR /UKR /ENU (Use these settings to create Adobe PDF documents best suited for high-quality prepress printing. (Za stvaranje Adobe PDF dokumenata najpogodnijih za visokokvalitetni ispis prije tiskanja koristite ove postavke. Keywords: converter; engine; power; splitter; stand; voltage
• Transformation of Commercial Flows into Physical Flows of Electricity – Flow Based Method by Adamec, M. (2009) - 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( ( ) ( ))� �� � . Theory The baseband source signal of CLIER S(t) can be written as S t a t e j t( ) ( ) ( )� � , a t( ) ,� 0 (1) where a(t) is the envelope of the baseband input signal and ej�(t) describes the phase of the baseband input signal. Keywords: efficiency; fig; network; power; recycling; signal; � �
• Implementation of a Power Combining Network for a 2.45 GHz Transmitter Combining LINC and EER by Wang, F.; Koch, O. (2009) - 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( ( ) ( ))� �� � . Theory The baseband source signal of CLIER S(t) can be written as S t a t e j t( ) ( ) ( )� � , a t( ) ,� 0 (1) where a(t) is the envelope of the baseband input signal and ej�(t) describes the phase of the baseband input signal. Keywords: efficiency; fig; network; power; recycling; signal; � �
• 2.45 GHz Class E Power Amplifier for a Transmitter Combining LINC and EER by Dirix, M.; Koch, O. (2009) - I I t I ts DC R R( ) sin( ) sin( ) sin( )� � � � � �� � � � � � . The current can be described as i t I tR R( ) sin( )� � �� � . Keywords: amplifier; class; current; fig; output; power; switch; voltage; � �
• Ultracapacitors Utilization for Automotive Applications by Pfof, Z.; Vaculík, P. (2010) - 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. Ultracapacitors cannot yet be used as a primary power source in automotive applications. 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: converter; power; switching; ultracapacitors; voltage
• Topology Control with Anisotropic and Sector Turning Antennas in Ad-hoc and Sensor Networks by Černý, V. (2011) - 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. 70◦ (0x), G1 = 2 dBi, G2 = 4 dBi, G3 = 8 dBi, G4 = 16 dBi, G5 = 20 dBi a) Exponential node chain and solution to have lower interference: introduction of auxiliary nodes b) Solution with sector antennas: no auxiliary nodes required, zero additional interference. Keywords: antenna; distribution; interference; network; nodes; power; radiation; sector
• Research and development of CO2 Capture and Storage Technologies in Fossil Fuel Power Plants by Pilař, Lukáš; Hrdlička, Jan (2012) - 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. The sys- tem is designed as a closed system, filling with cooling water and removing dense salt water as needed. Keywords: ammonia; co2; cooling; flue; gas; power
• Design Process of Energy Effective Shredding Machines for Biomass Treatment by Beniak, Juraj; Ondruška, Juraj; Čačko, Viliam (2012) - 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). In the case of material moisture, we have some practical experience, but we have not carried out any 135 Acta Polytechnica Vol. 52 Keywords: angle; face; material; power; torque; wedge
• Development of an Ultralight with a Ducted Fan by Brabec, Jiří; Helmich, Martin (2012) - Keywords: available thrust, required thrust, propulsion, ducted fan. The following procedure will work with experimen- tally obtained available thrust values. Keywords: aircraft; power; propulsion; speed; thrust; unit
• A Comparison of Power Quality Controllers by Černek, Petr; Brejcha, Michal; Hájek, Jan; Pígl, Jan (2012) - FACTS: modelling and sim- ulation in power networks. 1 Introduction In recent decades, power quality has become topic number one. Keywords: network; power; quality; voltage
• ESSO — Electrification of the Central Labe Districts between 1916 and 1950 by Holovský, Jan (2012) - 3.3 Hydroelectric power stations Besides steam power plants, ESSO also owned several hydroelectric power plants. The capital needed for constructing new power stations, elec- tric wiring, transformation stations, etc., was bor- rowed from financial institutions, villages, districts, or directly from electricity consumers, who received principals in return. Keywords: electricity; esso; kolín; labe; plant; power; power plant; room; station; steam; union
• The Influence of Nitrogen in Ar+N2 Mixture on Parameters of High-Temperature Device with Electric Arc by Jakubova, Ivana; Senk, Josef; Laznickova, Ilona (2013) - 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. Conclusions can be useful for the design of high temperature devices operating with argon/nitrogen mixture. Keywords: anode; arc; device; nitrogen; power
• IMPROVING SPECIFIC POWER CONSUMPTION FOR MECHANICAL MIXING OF THE FEEDSTOCK IN A BIOGAS FERMENTER BY MECHANICAL DISINTEGRATION OF LIGNOCELLULOSE BIOMASS by Kratky, Lukas; Jirout, Tomáš (2014) - Keywords: fermenter, lignocellulose biomass, mixing, specific power consumption, wheat straw. Dependence of power consumption on impeller speed. Keywords: batch; consumption; impeller; mixing; power; power consumption; straw
• ENERGY EFFICIENCY OF PLANAR DISCHARGE FOR INDUSTRIAL APPLICATIONS by Kelar, Jakub; Čech, Jan; Slavíček, Pavel (2015) - Typical current and voltage waveforms of DCSBD operated at input power of approx. It can be seen that when high added noise is present the absolute error of the power input estimation can be more than 0 to 12W at 250W of input power (i.e., 5% of the value). Keywords: current; dcsbd; discharge; estimation; phase; plasma; power; voltage
• Power Characteristics of a Screw Agitator in a Tube by Rieger, F. (2001) - Substracting equations above we obtain the following equation for � � � �a P P e e� � �max * min * max * min * (9) Coefficient c can be expressed from (8) c P ae� �max * max * (10) 3 Results and discussion The procedure proposed above was applied for a screw ag- itator with the following parameters: pitch s = 2D, root diameter d = 0.2 D and length L = 1.4 D – see Fig. In the creeping flow regime Eq.(1) reduces to � �P P e* * *� (5) and the dimensionless power characteristic is linear P c ae* *� � (6) Keywords: characteristics; fig; power
• Power Input of High-Speed Rotary Impellers by Beshay, K. R.; Kratěna, J.; Fořt, I.; Brůha, O. (2001) - � (7) which was reduced, according to the present geometry, i.e., T/D = 3 and H/T = 1.0, to the form: � �Po n h DB� � � � � � 10092 0 701 0 165 2 077. sin. . . � � 0 140 2 077 . Keywords: impeller; power; � �
• Design of a Three Surfaces R/C Aircraft Model by Coiro, D. P.; Nicolosi, F. (2002) - AP2002_01.vp 1 Introduction In the last twenty years canard configurations have be- come more and more usual, especially for light and very light aircraft. After the Wrights’ first flying machines, the revival of canard configuration on classical “backward-built” airplanes has been pushed by experimental aircraft and by the evolu- tion of the numerical and experimental tools necessary to accomplish the design of this type of configuration. Keywords: aircraft; canard; configuration; engine; fig; power; propeller; wing
• EXPERIMENTAL CHARACTERIZATION OF A MAGNETOHYDRODYNAMIC POWER GENERATOR UNDER DC ARC PLASMA by Ayeleso, Ayokunle Oluwaseun; Kahn, Mohamed T. E. (2018) - Measured power from the MHD generator under DC arc plasma experiment. The systemic offset voltage measured without DC arc plasma. Keywords: arc; figure; generator; mhd; plasma; power; voltage
• LOW LEAKAGE CHARGE RECYCLING TECHNIQUE FOR POWER MINIMIZATION IN CNTFET CIRCUITS by Kavitha, Manickam; Kalpana, Alagar M. (2019) - The main idea of the paper is to reduce the power dissipation of CNTFET digital circuits by using a methodology called power gating. Percentage savings of power gated circuits when N is varied. Keywords: carbon; charge; circuits; cntfet; figure; gating; leakage; mode; power; sleep; technique; voltage
• Preliminary Determination of Propeller Aerodynamic Characteristics for Small Aeroplanes by Slavík, S. (2004) - � � � � � ) cos( ) ,2 �i (5) and the angle of the real incoming flow �: � � � � � � � � � ��� � � � � � � �0 7 0 7 0 7 0 7 . . � � � �0 7 0 7 (8) Calculation of the thrust coefficient at given advance ra- tios requires not only the lift cl(�) and drag cd(�) blade curves but also the relationship to determine angle of attack �. Keywords: blade; drag; factor; lift; lock; power; propeller; thrust; � �
• Improving the efficiency of a steam power plant cycle by integrating a rotary indirect dryer by Sabatini, Michel; Havlík, Jan; Dlouhý, Tomáš (2021) - 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: content; dryer; drying; efficiency; fuel; moisture; moisture content; plant; power; power plant; steam
• CO2 power cycle chemistry in the CV Řež experimental loop by Berka, Jan; Ballek, Jakub Vojtěch; Velebil, Ladislav; Purkarová, Eliška; Vagenknechtová, Alice; Hlinčík, Tomáš (2021) - The development technology and applications of supercritical CO2 power cycle in nuclear energy, solar energy and other energy industries. Power cycles using carbon dioxide in a supercritical state (sc-CO2) can be used in both the nuclear and non-nuclear power industry. Keywords: carbon; co2; cycle; dioxide; experimental; gas; impurities; loop; medium; power
• Simulation of laser drilling of Inconel X-750 and Ti-5Al-2.5Sn sheets using COMSOL by Hanon, Muammel M.; Taha, Ziad A.; Zsidai, László (2021) - Among these techniques, laser drilling has become the novel technique for meet- ing a vast majority of possible industrial requirements for micro-hole drilling [11]. 4/2021 Simulation of laser drilling of Inconel X-750 . . Keywords: alloy; drilling; duration; hole; inconel; laser; peak; power; pulse; pulse duration; x-750
• Self tunning filter for three levels four legs shunt active power filter with fuzzy logic controller by Djendaoui, Dahmane; Benaissa, Amar; Rabhi, Boualaga; Zellouma, Laid (2021) - For this purpose, the three-level inverter is used in this paper as a three-phase four-leg shunt active power filter (SAPF). 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. Keywords: control; current; figure; filter; load; phase; power; voltage
• Orthonormal polynomial projection quantization: an algebraic eigenenergy bounding method by Handy, Carlos R. (2022) - OPPQ-BM Estimates (i.e. ∂ESN (E) = 0) for V (x) = x6 − 4x2, ms = 0, R(x) = Φgr(x) based on the first 61, EMM generated, ground state power moments {ugr(p ≤ 60)}. Singular-perturbation strong coupling problems and moment representations It is not widely appreciated that power moments are relevant in understanding the multiscale structure of most systems. Keywords: bounding; bounds; emm; mer; method; moments; oppq; order; power; state
• PAPR reduction in CP-OFDM (5G) using hybrid technique by Yusof, Azlan; Idris, Azlina; Abdullah, Ezmin (2023) - This Group Codeword Shifting technique aims for the ar- rangement of the codeword and the bit structure that reduce PAPR, by manipulating these two parameters, the alternative codeword with lower PAPR is created. In comparison to SLM and clipping and filtering techniques, the PTS approach is more effective in reducing PAPR values [4]. Keywords: codeword; gcs; hybrid; law; mcs; ofdm; papr; power; scs; shift; signal; technique; value
• Study of non-stationary cutting processes in power skiving by Hrytsai, Ihor; Slipchuk, Andrii (2024) - Using power skiving to increase the efficiency and precision of internal gear cutting. Chip geometry and cutting forces in gear power skiving. Keywords: cutting; force; gear; pass; passes; power; skiving; tool; tooth
• Analysis of the Fuel Efficiency of a Hybrid Electric Drive with an Electric Power Splitter by Čundev, D. (2008) - When simulating a of power drive system, is essential to calculate precisely the efficiency of each component where there is energy transformation. Keywords: Hybrid drive, fuel efficiency, European driving schedule, electric power splitter, electric traction motor, super-capacitor. Keywords: drive; driving; efficiency; fig; hybrid; power

• Stochastic Models of Solid Particles Grinding by Zueva, G. A.; Padokhin, V. A.; Ditl, P. (2010) - Mathematical models of disintegration kinetics are classified on the basis of the class of Markov process that they belong to. Keywords: Markov processes, grinding kinetics models, density of distribution. Keywords: device; distribution; markov; process; processes
• UML-oriented Risk Analysis in Manufacturing Systems by Jirsa, J.; Žáček, J. (2010) - Keywords: risk analysis, Unified Modelling Language, manufacturing systems. For this we need risk analysis. Keywords: analysis; diagram; fig; object; process; risk; risk analysis; uml
• A Taxonomy of Technical Animation by Vaněček, D.; Jirsa, J. (2011) - Our aim is to show the taxonomy of education animation. This article deals with computer animation in technical education. Keywords: animation; fig; figure; process; student
• FMEA and FTA Analyses of the Adhesive Joining Process using Electrically Conductive Adhesives by Povolotskaya, E.; Mach, P. (2012) - FMEA is a technique for analyzing the occur- rence of process failures and their effect on the re- sult of a process There are four basic types of FMEA: process FMEA, system FMEA, de- sign FMEA and service FMEA. Keywords: adhesive; analysis; failure; fault; fmea; fta; joining; process; risk; tree
• A Task-driven Grammar Refactoring Algorithm by Halupka, Ivan; Kollár, Ján; Pietriková, Emília (2012) - The difference in objective functions is the difference between the values of the objective function calculated for a post-grammar of the current population and the corresponding post-grammar of the previous population of grammars. The second step in the first phase of the algorithm creates corresponding post-grammars for each gram- mar population entity by applying its process chain to the initial grammar, and finally the third step calcu- lates the difference of the objective function calculated for the initial grammar and the post-grammar of the corresponding grammar population entity. Keywords: algorithm; context; function; grammar; objective; population; process; refactoring
• Erosion Wear of Axial Flow Impellersin a Solid-liquid Suspension by Fořt, I.; Medek, J.; Ambros, F. (2001) - � � , rolled brass, � � �15°, 45°� (4a) � �� � �k 4 73 631. � � , construction steel, � � �20°, 45°� (4b) characterizes the relation between the erosion wear of the impeller blade and the corresponding (axial) component of the mean velocity in the discharge stream leaving a pitched blade impeller Keywords: blade; erosion; impeller; process; � �
• THE HISTORY OF THE S PROCESS AND ITS PRESENT STATE by Shaviv, Giora (2013) - Richter gave no information about anything unusual with respect to s-process elements. The full story of FG Sagittae has not yet been re- vealed [32], but the accepted view at the present time is that FG Sagittae experienced the last episode of s-process elements formation during the “last ther- mal pulse” and ejected the rest of the envelope as a planetary nebula. Keywords: elements; fig; figure; mixing; neutron; nuclei; process; shell; star
• A COMPACTING PROCESS OF THE EN AW 6060 ALLOY by Dragošek, Lukáš; Kociško, Róbert; Kováčová, Andrea; Bidulsky, Robert; Škrobian, Milan (2015) - 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 0.83mm/s). Moreover, it was recognized that in the process of small chips compacting, there was obtained lower density than in the case of large chips. Keywords: chips; compacting; density; doi; materials; process; processing
• MODIFICATION OF POWDER MATERIAL BY COMPACTION PROCESSING by Peciar, Peter; Macho, Oliver; Eckert, Maroš; Kabát, Juraj; Gabrišová, Ľudmila; Kotora, Peter; Fekete, Roman; Peciar, Marián (2017) - Distribution characteristics of pure raw material and created product In the processing of powder materials, the quality and size of the products are strongly determined by, among other things, the distribution characteristics of the processed raw material. Acta Polytechnica doi:10.14311/AP.2017.57.0116 Acta Polytechnica 57(2):116–124, 2017 © Czech Technical University in Prague, 2017 available online at http://ojs.cvut.cz/ojs/index.php/ap MODIFICATION OF POWDER MATERIAL BY COMPACTION PROCESSING Peter Peciar∗, Oliver Macho, Maroš Eckert, Juraj Kabát, Ľudmila Gabrišová, Peter Kotora, Roman Fekete, Marián Peciar Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Process Engineering, Námestie Slobody 17, 812 31, Bratislava, Slovakia ∗ corresponding author: peter.peciar@stuba.sk Abstract. Keywords: compaction; compressibility; figure; material; particles; powder; process; product; rolls; strength
• Process Design for Hot Forging of Asymmetric to Symmetric Rib-web Shaped Steel by Cho, H.; Oh, B.; Jo, C.; Lee, K. (2003) - There- fore, optimal die design is necessary in order to avoid an increase in the forming load. [N/mm] [N/mm] Fig. 9: Impressed load per unit length of the side and top die: a) side die, b) top die Fig. Keywords: die; fig; forging; process; stage
• RAPID VISUALIZATION OF THE MASS DISTRIBUTION PROFILE OF ELECTROSPUN LAYERS by Pokorný, Marek (2018) - A series of experiments proved that the developed collector allows an easy evaluation of the appearance of nanofibrous layers as well as the effects of many associated factors such as emitter configuration on the resulting sample. The results showed how the properties of nanofibrous layers (such as deposition zone dimensions, location of these zones, mass distribution profiles produced by different spinning nozzles) can change during the electrospinning process. Keywords: analysis; collector; distribution; electrospinning; layers; mass; materials; process; thickness
• WAAM TECHNOLOGY OPTIMIZED BY OFF-LINE 3D ROBOT SIMULATION by Gurčík, Tomáš; Kovanda, Karel (2019) - The results prove that, by combining off-line welding path optimization with an optimized CMT welding process, we can achieve a stable WAAM process. The wire feeder responds to this change with a high feeding speed to stabilize welding parameters with a right welding arc length. Keywords: dip; figure; line; process; technology; transfer; waam; welding; wire
• STUDY OF SAMPLES STRENGTH OF MATERIAL FORMED BY THE PROCESSES OF COMPACTION, EXTRUSION AND TUMBLING GRANULATION by Peciar, Peter; Ružinský, Radovan; Guštafík, Adam; Karľová, Mária; Čierny, Matúš; Fekete, Roman; Peciar, Marián (2019) - Extrusion process The basic difference between the extrusion process and the above mentioned technologies is the amount of liquid in the processed material. The physical principle for identifying the force needed to break the sample in the compaction and extrusion process is shown in Figure 10 a), the force needed to disintegrate the sample in the compaction and extrusion process is shown in Figure 10 b) and the force needed to disintegrate the sample in the granulation process is shown in Figure 10 c). Keywords: compaction; dust; extrusion; figure; granulation; liquid; material; process; processes; rolls; tumbling
• COMPENSATION OF SPRINGBACK IN LARGE SHEET METAL FORMING by Pačák, Tomáš; Tatíček, František; Valeš, Michal (2019) - The methodology consists of three main parts: correct settings of virtual forming process (numerical simulation), springback analysis and springback compensation. Springback analysis and optimization in sheet metal forming. Keywords: analysis; compensation; geometry; methodology; numerical; process; results; springback
• STUDY OF SYNTHETIC DYE REMOVAL USING FENTON/TiO2, FENTON/UV, AND FENTON/TiO2/UV METHODS AND THE APPLICATION TO JUMPUTAN FABRIC WASTEWATER by Agustina, Tuty Emilia; Teguh, Dedi; Wijaya, Yourdan; Mermaliandi, Febrian; Bustomi, Ahmad; Manalaoon, Jantan; Theodora, Gita; Rebecca, Tessa (2019) - 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: cod; colour; degradation; fenton; method; process; ratio; reaction; removal; tio2; treatment; wastewater
• Finite Element Modelling of Mechanical Phenomena Connected to the Technological Process of Continuous Casting of Steel by Heger, J. (2004) - Keywords: Continuous casting, steel slab, numerical simulation, finite element method, nonlinearity, large deformations, contact, crack initiation. © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 15 Acta Polytechnica Vol. 44 No. 3/2004 Finite Element Modelling of Mechanical Phenomena Connected to the Technological Process of Continuous Casting of Steel J. Heger A finite element method algorithm is presented that enables numerical simulation of real phenomena that take place during an industrial process of continuous casting of steel. Keywords: casting; m �; process; product; simulation; slab; � �
• ZnO-Zeolite nanocomposite application for photocatalytic degradation of procion red and its adsorption isotherm by Agustina, Tuty Emilia; Gayatri, Rianyza; Bahrin, David; Moeksin, Rosdiana; Gustini (2022) - In this paper, the photocatalytic degradation of procion red dye, one of the most frequently used dyes in the textile industry, was studied. The objective of the research is to study the ZnO-Zeolite nanocomposite application to degrade procion red dye by using different irradiation sources. Keywords: adsorption; degradation; dye; isotherm; light; nanocomposite; process; procion; red; sunlight; zeolite; zeolite nanocomposite; zno
• A business process model as a starting point for tight cooperation among organizations by Mysliveček, O. (2006) - Keywords: Business process management, business process model, outsourcing, joint venture, poster 2006. [1, 2, 4]. 3 Procedure for process outsourcing If a company has business process management already integrated into its management system, it has a very good starting point for successful outsourcing of its processes. Keywords: business; process; processes
• Advanced Load Effect Model for Probabilistic Structural Design by Sýkora, M. (2006) - Since the integration variable ��(0, �) in (19) is always positive, FT0on(�) is evaluated for values 0 � ��� � �. (10) Substitution of (3) and (10) into (7) leads to CDF FT0eff(t) F e e eeffT t t tt t t0 1 1 1( ) ( )� � � � � �� � �� �� � � . Keywords: conditions; probability; process; t t; � p; � t; � �
• Investigation the plastic flows in the metal stamping-drawing process at the die corner by Onopchenko, Anton V.; Kurin, Maksym O.; Shyrokyi, Yurii V.; Horbachov, Oleksii O. (2024) - Study of factors affecting springback in sheet metal forming and deep drawing process. 2. Numerical simulation of the stamping-drawing in LS-DYNA In order to test the effectiveness of the model for calculating the processes of plastic deformation of different sheet materials, based on a closed set of equations of continuum mechanics, in predicting the numerical simulation of sheet metal stamping- drawing, the model established in this paper was used to simulate the distribution of plastic equiva- lent stresses in sheet metal parts, based on LS-DYNA software. Keywords: alloys; blank; die; drawing; figure; material; metal; process; sheet; stamping
• Drece method for continuous severe plastic deformation of CuZn37 sheets by Pastrňák, Martin; Čada, Radek; Pektor, Tomáš; Rusz, Stanislav; Tatíček, František; Mizera, Jarosław; Pastrňáková, Marie (2024) - Tensile stress-strain curves of the CuZn37 alloy depending on the number of DRECE passes. Tensile properties depending on the number of DRECE passes. exhibits very good plastic properties. Keywords: deformation; drece; materials; microstructure; pass; passes; process; properties

• An Empirical Method for Estimating Global Solar Radiation over Egypt by Khalil, S. A.; Fathy, A. M. (2008) - 2 Methodology The original form, proposed by Angstrom, expressed the correlation between clear sky global solar radiation and sun- shine duration as follows: G G a b S Nc� �{ ( )}. List of symbols Gc clear sky global solar radiation in kW/m2, 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. Keywords: ges �; global; method; radiation; values; � �
• On realizations of Lie algebras by Nesterenko, Maryna; Pošta, Severin; Staryi, Mykola (2025) - − x7∂7 − x8∂8 − x9∂9 + ∂10. − x7∂7 − x8∂8 − x9∂9 + ∂10. Keywords: algebras; case; conformal; fields; group; lie; method; realizations; representations; vector
• Investigation into Methods for Predicting Connection Temperatures by Anderson, K.; Gillie, M. (2009) - This paper examines two current methods available for predicting connection temperatures as defined in Eurocode A 3D finite element model is also created to predict connection temperatures using the commercial software package Abaqus Keywords: connection; method; plate; results; temperatures; � �
• Synthesis of Room Impulse Responses for Variable Source Characteristics by Kunkemoeller, M.; Dietrich, P.; Pollow, M. (2011) - 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: spherical harmonics, adjustable source directivity, room impulse response, linear room acoustics. Keywords: array; loudspeaker; measurement; method; radiation; responses; room; synthesis
• Global Optima for Size Optimization Benchmarks by Branch and Bound Principles by Pospíšilová, Adéla; Lepš, Matej (2012) - Keywords: benchmarks, discrete sizing optimization, branch and bound method, global optima, parallel programming. It is thus advan- tageous to decrease the upper bound on the basis of already obtained objective function values. Keywords: algorithm; bound; function; method; optimization; optimum; truss; value
• PRODUCTION OF PROTOTYPE PARTS USING DIRECT METAL LASER SINTERING TECHNOLOGY by Sedlak, Josef; Zemčík, Oskar; Slaný, Martin; Chladil, Josef; Kouřil, Karel; Sekerka, Vít; Rozkošný, Luboš (2015) - Discussion Nowadays prototype production is realized with the help of programmable power and hydraulic brakes or with the help of a 3D laser technology that pro- vides a high accuracy, minimal heat deformation and high-speed machining of metal parts. The setting of the price of prototype parts according to data volumes of individual models in STL format is a part of the company know-how. Keywords: additive; dmls; forming; metal; method; parts; price; production; prototype; technology
• AN INTERPOLATION METHOD FOR DETERMINING THE FREQUENCIES OF PARAMETERIZED LARGE-SCALE STRUCTURES by Nasisi, Salvatore; Valášek, Michael; Vampola, Tomáš (2015) - 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. doi:10.1524/auto.2010.0863 [5] D. G. Meyer, S. Srinivasan, Balancing and Model Reduction for Second-Order Form Linear Systems, IEEE Transactions on Automatic Control, 41 (November 1996) 1632-1644.doi:10.1109/9.544000 [6] A. C. Antoulas, D. C. Sorensen, S. Gugercin, A survey of model reduction methods for large-scale systems, Structured Matrices in Mathematics, Computer Science, and Engineering I, (2001) 193–219. doi:10.1090/conm/280/04630C [7] A. Beattie, Krylov-based model reduction of second-order systems with proportional damping, Proceedings of the 44th IEEE Conference on Decision and Control, and the European Control Conference, (12-15 December 2005). Keywords: deformation; frequencies; interpolation; interpolation method; matrices; matrix; method; order; reduction; rotation
• A QUANTITATIVE EVALUATION OF THE WATER DISTRIBUTION IN A SOIL SAMPLE USING NEUTRON IMAGING by Šácha, Jan; Sněhota, Michal; Hovind, Jan (2016) - Studies [13, 14] have noted the difference between the NI-derived water content and the results of gravimetric measurements of water content. In situ neutron radiography of lithium-ion batteries: the gas evolution on graphite electrodes during the charging, Journal of Power Sources, 130(1-2), 221-226, doi:10.1016/j.jpowsour.2003.11.065 393 http://dx.doi.org/10.1016/j.nima.2012.12.112 http://dx.doi.org/10.1016/j.phpro.2013.03.002 http://dx.doi.org/10.1111/j.1475-4754.2006.00244.x http://dx.doi.org/10.1016/j.jpowsour.2003.11.065 Jan Šácha, Michal Sněhota, Jan Hovind Acta Polytechnica [7] Prazak, J., J. Tywoniak, F. Peterka, and T. Slonc (1990), Description of transport of liquid in porous-media - a study based on neutron radiography data, International Journal of Heat and Mass Transfer, 33(6), 1105-1120, doi:10.1016/0017-9310(90)90244-O [8] Moradi, A. B., A. Carminati, D. Vetterlein, P. Vontobel, E. Lehmann, U. Weller, J. W. Hopmans, H. J. Vogel, and S. E. Oswald (2011), Three-dimensional visualization and quantification of water content in the rhizosphere, New Phytologist, 192(3), 653-663, doi:10.1111/j.1469-8137.2011.03826.x [9] Beer (1852) Bestimmung der Absorption des rothen Lichts in farbigen Flüssigkeiten (Determination of the absorption of red light in colored liquids), Annalen der Physik und Chemie, vol. 86, pp. Keywords: beam; content; correction; image; imaging; method; neutron; sample; thickness; water; water content
• BACK TO BASICS: TOWARDS NOVEL COMPUTATION AND ARRANGEMENT OF SPATIAL SENSORY IN IMAGES by Wen, Wei; Khatibi, Siamak (2016) - We believe that the orbit domain image processing has a great potential to be the standard processing for hexagonal images. The similarity of the grid in the funda- mental domain of a certain orbit function from Weyl group to the grid of hexagonal images makes the orbit functions interesting for the hexagonal computation in which it becomes possible to process hexagonal images without any further transformation. Keywords: computation; domain; figure; grid; images; intensity; method; orbit; pixel; processing; sensor; square
• IMPLEMENTATION OF 3D VOF TRACKING ALGORITHM BASED ON BINARY SPACE-PARTITIONING by Kolařík, Filip; Patzák, Bořek (2017) - 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 S i for each interface cell i with VOF value fi to each of its adjacent cell with k with VOF value fk. Keywords: algorithm; bsp; cube; faces; figure; fluid; interface; method; plane; polyhedron; tree; vof; volume
• AERODYNAMIC LOAD OF AN AIRCRAFT WITH A HIGHLY ELASTIC WING by Schoř, Pavel (2017) - Keywords: aerodynamics, panel method, finite element method, wing load, fluid structure interaction. Eligibility Based on assumptions made in Sections 2.1 and 2.2, the method presented in this article is suitable for analysis of quasi-static maneuvers of an aircraft with elastic wings, operating at a low Mach number (M < 0.3) and sufficiently high Reynolds number (Re > 1000000). Keywords: aerodynamic; aircraft; element; figure; lift; load; method; moment; panel; wing
• AUTOMATIC CLASSIFICATION OF POINT CLOUDS FOR HIGHWAY DOCUMENTATION by Hůlková, Martina; Pavelka, Karel; Matoušková, Eva (2018) - The crucial part of the roadway datasets processing, as well as in many other applications, is the extraction of objects of interest from point clouds. Despite the fact that the concept of the method for overall structure recognition from mobile laser scanned point clouds was presented in [2], most of the later presented works still focuses on the detection of a sole object type. Keywords: classification; cloud; image; method; objects; point; raster; terrain
• INVESTIGATION OF THE DYNAMIC BEHAVIOUR OF NON-UNIFORM THICKNESS CIRCULAR PLATES RESTING ON WINKLER AND PASTERNAK FOUNDATIONS by Salawu, Saheed; Sobamowo, Gbeminiyi; Sadiq, Obanishola (2020) - c2 − 32a2 10 + 32a1 10 + 36a1 14kp 7 − 36a2 14kp 7 + 36a14kp 7 ) c34+ + 1 24  ( 112a1 10 − 112a2 10 + 54a14kp 7 ∂r + 3m2 r3 w(r, t) } + ∂2g(r) ∂r2 { ∂2w(r, t) ∂r2 + ν ( 1 r ∂w(r, t) ∂r − m2 r2 w(r, t) )} − ks ∂2w(r, t) ∂r2 − ks 1 r ∂w(r, t) Keywords: circular; foundation; free; frequency; method; plate; thickness; vibration
• COMPLEXITY REDUCTION OF CYCLOSTATIONARY SENSING TECHNIQUE USING IMPROVED HYBRID SENSING METHOD by Abdullah, Hikmat N.; Dawood, Zinah O.; Abdelkareem, Ammar E.; Abed, Hadeel S. (2020) - 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: complexity; detection; detector; hybrid; method; performance; sensing; signal; spectrum
• Comparison of the Capacitance Method and the Microwave Impulse Method for Determination of Moisture Profiles in Building Materials by Tesárek, P.; Pavlík, J.; Černý, R. (2005) - Keywords: Moisture profiles, capacitance method, microwave impulse method, building materials. re c o n te n t [k g k g -1 ] capacitance method microwave method gravimetric method Fig. Keywords: capacitance; capacitance method; content; impulse; method; microwave; moisture
• Solving Inverse Kinematics – A New Approach to the Extended Jacobian Technique by Šoch, M.; Lórencz, R. (2005) - d dx J� �( )q q (3) [8] suggested a more general form of optimization with pseudo- -inverse by minimizing objective function g(q): � �d dq q q q q q � � � � �J x I J J+ + g ( ) ( ) ( ) ( ) � � � , (5) where I is identity matrix and � is positive gain constant. Keywords: inverse; jacobian; joint; method; structure; � �
• Improvement of spectrum sensing performance in cognitive radio using modified hybrid sensing method by Abed, Hadeel S.; Abdullah, Hikmat N. (2022) - Pd versus Eb/No of proposed sensing methods under Rayleigh fading and non-cooperative scenario. Figure 3 shows the performance curves of Pd vs Eb/No for traditional sensing methods (energy detec- tion, cyclostationary, and matched filter) in AWGN using the non-cooperative scenario. Keywords: cognitive; complexity; cooperative; detection; hybrid; method; performance; sensing; signal; spectrum
• CaC in ATM – the Diffuse Method by Baroňák, I.; Vozňák, M. (2006) - 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( ). From relation (1) we obtain the quadratic equation ( ) ( )� � � � �� � � � �C C2 2 12 2 0, (10) where for the account we use artificial variables � � �� 2 2B (11) and � � �1 2� ln( ). Keywords: cell; connections; diffuse; method; series; service; � �
• Geometric approach to solving inverse kinematics of six DOF robot with spherical joints by Hadidi, Nacer; Bouaziz, Mohamed; Mahfoudi, Chawki; Zaharuddin, Mohamed (2023) - + ay.nz.sx + az.nx.sy − az.ny.sx) , s2 = −(a2.s3 − a3.s2) (ax.ny.sz − ax.nz.sy − ay.nx.sz + ay.nz.sx + az.nx.sy − az.ny.sx) , s3 = (n2.s3 − n3.s2) (ax.ny.sz − ax.nz.sy − ay.nx.sz + ay.nz.sx + az.nx.sy − az.ny.sx) , n1 = −(ax.sz − az.sx) (ax.ny.sz − ax.nz.sy − ay.nx.sz + ay.nz.sx + az.nx.sy − az.ny.sx) , n2 = (ax.sz − az.sx) (ax.ny.sz − ax.nz.sy − ay.nx.sz + ay.nz.sx + az.nx.sy − az.ny.sx) , n3 = −(nx.sz − nz.sx) (ax.ny.sz − ax.nz.sy Keywords: angle; approach; cos; dof; effector; end; equation; figure; inverse; inverse kinematics; joint; kinematics; method; position; robot; sin; vectors; −−→
• Evaluation of a Reflection Method on an Open-Ended Coaxial Line and its Use in Dielectric Measurements by Zajíček, R.; Vrba, J.; Novotný, K. (2006) - The dispersion magnitude is described as � � �� � �s . For distilled water, the dielectric constants are: � �� � 78.3, � �s � 4.6, � � � 8.07 ps, � �i � 2 S�m�1, � � � 0.014. Keywords: frequency; measurement; method; permittivity; tissue; � �
• The load-transfer method as a tool for determining the load-displacement curve of piles by Chalmovský, Juraj; Račanský, Václav; Koudela, Pavel; Zdražil, Karel (2024) - Development of axial pile load transfer curves based on instrumented load tests. The action of soft clay along friction piles. Keywords: displacement; figure; friction; load; loading; method; piles; shaft; tests; transfer
• A novel approach to nonlinear fractional volterra integral equations by Hussein, Mohammed Abdulshareef; Jassim, Hassan Kamil (2024) - 5/2024 A novel approach to nonlinear fractional Volterra integral equations Now: arcsin (ψ(t)) 5/2024 A novel approach to nonlinear fractional Volterra integral equations [27] A.-M. Wazwaz. Keywords: equations; fractional; method; volterra

• Compressive behaviour at High Temperatures of Fibre Reinforced Concretes by Santos, S. O.; Rodrigues, J. P. C.; Toledo, R.; Velasco, R. V. (2009) - A Portuguese study and a Brazilian study are described, which were carried out to develop fiber concrete compositions with better fire behavior. 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. Keywords: concrete; fibers; specimens; temperatures
• Performance of Beams Made of Low-cost Self-compacting Concrete in an Aggressive Environment by Safan, M. A. (2011) - Ductility index and ultimate loads recorded for test beams control beams beams in a corrosive environment beam ultimate load, deflection, mm ductility beam ultimate load, deflection, mm ductility kN Δy b Δu b index kN Δy b Δu b index B1 59.6 (1.00)a 2.66 18.58 7.0 B1C 55.0 (0.92) 3.59 10.38 2.9 B2 53.1 (0.89) 3.14 9.98 3.2 B2C 50.4 (0.85) 3.21 7.12 2.2 B3 52.0 (0.87) 3.17 7.17 2.3 B3C 48.7 (0.82) 3.55 7.05 2.0 B4 54.8 (0.92) 3.00 13.8 4.6 B4C 52.3 (0.89) 2.88 9.70 3.4 B5 52.2 (0.88) 2.95 15.00 5.1 B5C 49.1 (0.82) 3.03 8.96 3.0 B6 53.0 (0.89) 2.75 17.00 6.2 B6C 51.7 (0.87) 3.94 8.54 2.2 B7 50.8 (0.85) 2.77 15.05 5.4 B7C 49.3 (0.83) 3.86 8.9 2.3 a ( ) : ultimate load as a fraction of the ultimate load of the control beam (B1) b Δy,Δu: mid-span deflection at yield and ultimate load, respectively (a) beams in Corrosive environment (b) control beams Fig. 7: 3 Experimental study The experimental work included the manufacture of two sets of test beams. Keywords: ash; beams; cement; concrete; corrosion; fly; fume; load; mixes; scc; silica; test
• Steel Fibre Reinforced Concrete for Tunnel Lining – Verification by Extensive Laboratory Testing and Numerical Modelling by Beňo, Jaroslav; Hilar, Matouš (2013) - 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: concrete; fibres; lining; segments; sfrc; sfrc segments; steel; strength; tests
• TRIAXIAL COMPRESSIVE STRENGTH OF ULTRA HIGH PERFORMANCE CONCRETE by Sovják, Radoslav; Vogel, Filip; Beckmann, Birgit (2013) - strength tests, as it has been found that fibres have no effect on triaxial compressive strength Triaxial compressive strength of the UHPC. Keywords: compressive; concrete; loading; strength; triaxial; uhpc
• Effect of Thermal Cycling on the Strength and Texture of Concrete for Nuclear Safety Structures by Hošková, Š.; Kapičková, O.; Trtík, K.; Vodák, F. (2001) - 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) Acta Polytechnica Vol. 41 No. 2/2001 17 Effect of Thermal Cycling on the Strength and Texture of Concrete for Nuclear Safety Structures Š. Hošková, O. Kapičková, K. Trtík, F. Vodák The effect of thermal cycling (freezing and thawing) on the texture and strength of two types of concrete is studied: Keywords: concrete; cycles; number; strength; temelín; volume
• Influence of Different Drying Conditions on High Strength Concrete Compressive Strength by Safan, M.; Kohoutková, A. (2001) - 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. [1]. 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: case; concrete; conditions; curing; days; fume; silica; strength; water
• Experiments with Externally Prestressed Continuous Composite Girders by Safan, M.; Kohoutková, A. (2001) - 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. Cracking extension and cracking width at different loading stages [8] Amadio, C., Fragiacomo, M.: A finite element method for the study of creep and shrinkage effects in composite beams with deformable shear connection. Keywords: beam; composite; concrete; cracking; load; loading; prestressing; slab; steel; support; tendon
• CRYSTALLINE ADMIXTURES AND THEIR EFFECT ON SELECTED PROPERTIES OF CONCRETE by Pazderka, Jiří; Hájková, Eva (2016) - Keywords: crystalline admixture; concrete; building envelope; water tightness; permeability. The results of these tests are very convincing, thus the water impermeability and high durability of concrete with crystalline admixtures may be declared. Keywords: admixture; concrete; crystalline; effect; strength; test; water
• Modelling of Deterioration Effects on Concrete Structures by Teplý, B. (2002) - The failure probability is defined as: � �� �p P g tf � �X, 0 (16) and can be evaluated at several time points ti (i � 1, 2, …, n). The formula for the time related rebar diameter decrease reads � � � � � �d Keywords: carbonation; cl �; concrete; corrosion; service; � �
• PROPERTIES AND MICROSTRUCTURE OF CEMENT PASTE INCLUDING RECYCLED CONCRETE POWDER by Topič, Jaroslav; Prošek, Zdenek (2017) - The resulting sample shrinkage was related to the length of 1 m and was only preliminary measurement carried out to verify the influence of increasing w/c ratios for RCP samples. A decrease of dynamic Young’s and shear moduli for RCP samples was primarily caused by the lower density of old cement paste in the RCP and also impacted by higher water content. Keywords: cement; concrete; grains; materials; paste; properties; rcp; reference; samples; strength
• UNDERGROUND AIR DUCT TO CONTROL RISING MOISTURE IN HISTORIC BUILDINGS: IMPROVED DESIGN AND ITS DRYING EFFICIENCY by Pazderka, Jiří; Hájková, Eva; Jiránek, Martin (2017) - 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: air; air duct; blocks; building; concrete; duct; masonry; moisture; water
• CHIMNEY RESERVOIRS: UNIQUE TECHNICAL STRUCTURES FROM THE FIRST HALF OF THE 20TH CENTURY IN THE CZECH REPUBLIC by Vonka, Martin; Kořínek, Robert (2018) - This article outlines the origin and evolution of different types of chimney reservoirs and describes the structural and technological designs used for such structures on the territory of what is now known as the Czech Republic. Not much has been published on the technical de- signs of chimney reservoirs in Czech literature – in 1906, a brief introduction to chimney water towers was written by František Klokner, a populariser of chimneys and future rector of the Czech Technical Uni- versity in Prague Keywords: chimney; chimney reservoirs; concrete; czech; factory; figure; pipe; prague; republic; shaft; steel; structure; tank; water
• Long-term Test Arrangement for Externally Strengthened Reinforced Concrete Elements by Vaňura, T.; Štěpánek, P.; Švaříčková, I.; Adámek, J. (2003) - 1: Time dependent deflections ofthree panels strengthened with a glass-fiber mat [2] under different load magnitudes The load position of two solitary forces was in one third of the span of each panel, but the strength of the load was dif- ferent for each of them. KEuords: carbon fiber (CFRP), glass fiber GERP), extemal strengtlrcning, epoxy-resin creep, test arrangement. Keywords: concrete; epoxy; load; panels; strengthening; tests
• INFLUENCE OF AGGRESSIVE ENVIRONMENT ON THE TENSILE PROPERTIES OF TEXTILE REINFORCED CONCRETE by Machovec, Jan; Reiterman, Pavel (2018) - 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: concrete; environment; figure; matrix; point; reinforcement; samples; strength; textile; trc
• THE SUGGESTIONS AS TO THE CALCULATION BEARING CAPACITY OF SANDWICH REINFORCED CONCRETE — FOAMED CONCRETE FLOOR SLABS by Lytvyniak, Oksana; Tashak, Myroslava (2019) - Keywords: sandwich reinforced concrete – foamed concrete floor slab; foamed concrete; calculation by limiting states; reinforced concrete; fiber polypropylene. The calculation of the stressed-formed state of the SRFCS is done on the basis of following preconditions: • the condition of combined work of normal concrete, foamed concrete and steel reinforcement and this situation was ensured in the experiment; • impartial Bernoulli’s hypothesis for plane sections is taken into consideration; • the curvilinear stress diagram of foamed concrete (as parabola) is changed for the equivalent bilinear diagram (orthogonal–triangular) Keywords: concrete; floor; floor slabs; reinforcement; sandwich; slabs; srfcs; steel
• ULTRA-HIGH-PERFORMANCE FIBRE-REINFORCED CONCRETE UNDER HIGH-VELOCITY PROJECTILE IMPACT. PART I. EXPERIMENTS by Kravanja, Sebastjan; Sovják, Radoslav (2018) - 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: concrete; crack; fibre; impact; penetration; projectile; properties; resistance; strength; uhpfrc; volume
• Influence of ? Irradiation on Concrete Strength by Sopko, V.; Trtík, K.; Vodák, F. (2004) - 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: concrete; irradiation; strength
• TECHNOLOGY OF PRODUCING REINFORCED CONCRETE COLUMNS OF CIRCULAR CROSS-SECTIONAL AND INVESTIGATION OF THEIR STRAIN-STRESS STATE AT TRANSVERSE-LONGITUDINAL BENDING by Rogovskii, Ivan L.; Titova, Liudmyla L.; Davydenko, Oleksii O.; Trokhaniak, Viktor I.; Trokhaniak, Oleksandra M. (2019) - Bearing capacity of compressed reinforced concrete columns with high-strength non-stressed reinforcement. Load and moment interaction diagram for circular concrete columns reinforced with gfrp bars and gfrp helices:. Keywords: bending; ccsc; column; compression; concrete; load; pre; reinforcement; strain; transverse
• COMPARATIVE STUDY AND EMPIRICAL MODELLING OF PULVERIZED COCONUT SHELL, PERIWINKLE SHELL AND PALM KERNEL SHELL AS A POZZOLANS IN CONCRETE by Ikponmwosa, Efe Ewaen; Ehikhuenmen, Samuel Onosedeba; Irene, Karieren Kate (2019) - Strength activity index (SAI) on pozzolans blended concrete The strength activity index (SAI) measures the poz- zolanicity of cement replacement materials (CRMs) and the measure is based on the variation of the strength with respect to its control in percent. 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: ash; concrete; curing; level; materials; pcs; pozzolans; ppks; pps; replacement; replacement level; shell; standard; strength
• INFLUENCE OF CHEMICAL POLYMER ADDITIVE ON THE PHYSICAL AND MECHANICAL PROPERTIES OF EXPANDED POLYSTYRENE CONCRETE by Wasiu, John; Baba, Daoud Mohammad (2020) - Slump chart with and without renolith at different % replacement of coarse aggregate with EPS beam. Computed densities at different % replacement of coarse aggregate with EPS beads. Keywords: aggregate; coarse; concrete; eps; rcpa; renolith; replacement; strength; test; water
• SHRINKAGE OF VARIOUS TYPES OF PORTLAND CLINKER-BASED CEMENTS WITH RESPECT TO THEIR HYDRATION DEGREE by Davidová, Vendula; Reiterman, Pavel (2020) - The main outcomes of the performed program could be summarized as follows: • Reaction kinetics of the cements essentially deter- mines the character of the measurement by using a conventional contact method, • Prolonged curing reduces final shrinkage, • Higher kinetics of cement hydration suppress the effect of the autogenous shrinkage and led to the significant overestimation of studied cements, • Lower kinetics of cement hydration led to the dom- inance of the drying shrinkage and a significant misrepresentation of obtained results, because the drying shrinkage is controlled by the diffusion, • Cement hydration is a complex reaction resulting in a solid structure. Keywords: cement; concrete; curing; degree; doi:10.1016; drying; figure; hydration; materials; properties; shrinkage; strength
• EXPERIMENTAL INVESTIGATION OF THE POZZOLANIC POTENTIALS OF MILLET AND RICE HUSK ASH AS MINERAL ADDITIVE IN SELF-COMPACTING CONCRETE by Wasiu, John; Oluwatosin, Fashina Ayoola (2020) - Rice husk ash as a partial replacement of cement in high strength concrete containing micro silica: Strength test using compression testing machine The load per unit area exerted on the concrete material under test and tending to shorten or reduce its size is called the compressive strength. Keywords: ash; concrete; mha; mineral; nvc; properties; rha; scc; self; strength; test
• DEFORMATION ANALYSIS OF LAYERED REINFORCED CONCRETE - FOAM CONCRETE FLOOR SLABS by Lytvyniak, Oksana (2020) - (12) The value of deformation εct1 on the upper tensile border of normal concrete (it is in a direct contact with a layer of tensile foam concrete) is determined from the equation (11) with the use of the change of the value of deformation εfc1 (in fixed limits) on the upper fibre of compressed foam concrete. (8) The corresponding values of relative deformations εfc1 on the upper limit of the compressed foam concrete are determined in an accordance with the prescribed values of relative deformations εct2 on the lower limit of tensile normal concrete according to the formula (7). Keywords: concrete; deformation; foam concrete; lrfcs; stresses; tensile; zc1; εfc1; εfc1 εfc1
• Size Effect in Fracture of Concrete Specimens and Structures: New Problems and Progress by Bažant, Z. P.; Yu, Q. (2004) - They proposed the semi-empirical formula: � �n a a � � � � � � � � � 0 1 2 1 * , (6) where �0 � �ft for small 3PB specimens; a� * is a certain con- stant; and �n represents the maximum tensile stress in the ligament based on a linear stress distribution over the liga- ment, � � �n N A� ( )0 . (13) and solving for �N, one gets an equation of the form of Bažant’s classical size effect law (1984): � �N D D� � � 0 0 1 21( ) . Keywords: bažant; concrete; crack; effect; fig; fracture; size; vol; � �
• NATM TUNNELS – CONSIDERATION OF THE PARTLY DAMAGED PRIMARY LINING IMPACT FOR THE SECONDARY LINING EVALUATION by Trunda, Vlastislav; Hilar, Matouš (2020) - Keywords: NATM, primary lining, numerical calculations, durability, lifetime. Concrete degradation NATM assumes a direct contact of primary lining generated from sprayed concrete with the surrounding ground. Keywords: concrete; degradation; ground; lining; parameters; primary; tunnel
• How Reliable is the Durability of RC Structures? by Teplý, B.; Rovnaník, P.; Keršner, Z.; Rovnaníková, P. (2004) - 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: carbonation; concrete; life; reliability; service; value
• USING TEXTILE ARAMID FABRICS TO INCREASE THE BALLISTIC RESISTANCE OF ULTRA-HIGH-PERFORMANCE STEEL-FIBRE REINFORCED CONCRETE by Mára, Michal; Sovják, Radoslav; Fornůsek, Jindřich (2020) - The Ultra-High-Performance Steel-Fibre-Reinforced Concrete with dispersing steel fibres seems to be one of the highly promising materials, which can be used in these cases One of the future challenges in terms of increasing the ballistic resistance would be aimed towards the targeted orientation of steel fibres in the cement matrix where it is possible to provide the requested position and direction of fibres, solving the main problem of the design. Keywords: aramid; concrete; fabrics; impact; projectile; resistance; sfrc; steel; textile; uhp
• PERFORMANCE OF SUSTAINABLE GREEN CONCRETE INCORPORATED WITH FLY ASH, RICE HUSK ASH, AND STONE DUST by Siddika, Ayesha; Amin, Md. Ruhul; Rayhan, Md. Abu; Islam, Md. Saidul; Mamun, Md. Abdullah Al; Alyousef, Rayed; Amran, Y. H. Mugahed (2021) - Influence of silpozz and rice husk ash on enhancement of concrete strength. Use of ultrafine rice husk ash with high-carbon content as pozzolan in high performance concrete. Keywords: addition; ash; cement; concrete; doi:10.1016; materials; properties; replacement; rha; rice; specimens; strength; water
• APPLICATION OF GLOBAL OPTIMIZATION TO PREDICT STRAINS IN RC COMPRESSED COLUMNS by Lechman, Marek; Stachurski, Andrzej (2021) - 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; bending; columns; compression; concrete; optimization; section; set
• Bearing capacity of damaged reinforced concrete beams strengthened with metal casing by Karpiuk, Irina; Danilenko , Denis; Karpiuk, Vasyl; Danilenko , Anna; Lyashenko, Tatiana (2021) - Keywords: Through normal and cross inclined cracks, reinforced concrete beam damaged by force cracks, prestressed metal casing, low-cycle alternating transverse load. It was experimentally established [7] that low-cycle transverse alternating and intermittent load of high levels does not only reduce the bearing capacity of pro- totypes (reinforced concrete beams) to 20 % and their crack resistance, but also significantly increases the width of the opening of normal cracks and, especially, oblique ones , the value of deflections up to 35 %, and also change the nature of their destruction in compar- ison with a one-time static loading of proportionally increasing load. Keywords: action; alternating; beams; bearing; bearing capacity; capacity; concrete; cracks; elements; load; reinforcement; shear; strengthening; structures; transverse
• Peculiar aspects of cracking in prestressed reinforced concrete T-beams by Karpiuk, Vasyl; Somina, Yuliia; Karpiuk, Fedir; Karpiuk, Irina (2021) - 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. By increasing the width ratio of the table overhangs to the thickness of the rib b / f /b 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: concrete; cracks; factors; reinforcement; shear; structures; table; value; width
• Effect of pigments on bond strength between coloured concrete and steel reinforcement by Assaad, Joseph J.; Mata, Matthew; Saade, Jad (2022) - [% of cement] Slump [mm] Air content [%] Density [kg/m]3 L a b ∆(E) 350-Control 2.6 205 2.8 2320 67.8 5.6 19.3 – 350-Red-1.5 % 2.6 205 n/a 2315 55.2 12.8 12.9 15.8 350-Red-3 % 2.9 200 2.7 2330 51.9 16.1 10.6 21.0 350-Red-4.5 % 3.2 200 2.9 2375 44.4 19.8 12 28.3 350-Grey-1.5 % 2.7 195 n/a 2330 61.9 2.2 12.4 9.6 350-Grey-3 % 2.9 205 3.1 2360 58.4 0.8 7.2 16.0 350-Grey-4.5 % 3.1 205 n/a 2350 49.4 -0.1 4.0 24.6 350-TiO2-1.5 % 2.7 210 n/a 2310 72.0 5.3 19.8 4.3 350-TiO2-3 % 3.0 210 3 2340 71.9 5.4 19.7 4.2 350-TiO2-4.5 % 3.1 195 2.9 2380 76.3 4.4 17.9 8.7 350-CBlack-1.5 % 2.9 190 n/a 2350 42.4 -0.2 -0.2 32.5 350-CBlack-3 % 3.5 195 3.2 2340 42.2 -0.5 -0.7 33.0 350-CBlack-4.5 % 3.6 205 3.4 2390 31.0 -0.05 -1.2 42.4 450-Control 2.4 205 3 2345 68.3 5.7 19.1 – 450-Red-3 % 2.5 210 3.1 2385 48.8 19.0 10.8 25.0 450-Grey-3 % 2.8 200 3 2385 56.2 0.58 6.9 17.9 450-TiO2-3 % 2.7 200 2.8 2405 77.1 5.1 19.1 8.9 450-CBlack-3 % 3.2 205 3.5 2415 41.9 -0.4 -0.8 33.6 The mix codification refers to cement content-Pigment type-Pigment dosage. To the other end, the magenta chromatic intense (i.e., a-value) varied from 5.55 to 16.1 for the 350-Control and 350-Red-3 % mixtures, respectively, while in contrast, the highest b-value of 19.75 corresponded to the 350-TiO2-1.5 % mix. Keywords: bond; cement; concrete; effect; figure; mixtures; pigments; properties; steel; strength; tio2
• Shear Strengthening of Reinforced Concrete Beams Using GFRP Wraps by Saafan, M. A. A. (2006) - 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. Keywords: beams; capacity; composite; concrete; failure; flexural; reinforcement; shear; strengthening; � �
• Concrete lintels reinforced with steel fibres oriented by a magnetic field by Carrera, Kristýna; Künzel, Karel; Konrád, Petr; Sovják, Radoslav; Papež, Václav; Mára, Michal; Fornůsek, Jindřich; Kheml, Přemysl (2022) - The specimens with oriented fibres show a significantly higher flexural strength, by 150 %, than specimens produced conventionally with the same volume of fibres. A total of 11 specimens were pro- duced, 6 of which with oriented fibres and 5 specimens produced in the standard way with fibres randomly ori- ented. Keywords: concrete; fibres; figure; non; specimens; steel
• A comparative experimental investigation of high-temperature effect on fibre concrete and high strength concrete using UT and CM methods by Royaei, Javad; Sadeghi, Kabir; Nouban, Fatemeh (2023) - 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: concrete; error; machine; minutes; results; samples; strength; temperatures; test; ultrasonic
• Compression behaviour and failure mechanisms of a safety culvert made of hollow high-performance concrete blocks by Hála, Petr; Hála, Petr; Šmejkal, Filip; Sovják, Radoslav (2023) - For concrete blocks, brick elements with a side length of approximately 35 mm and linear basis functions are used. Input parameters used with the fracture plastic constitutive model for concrete blocks. Keywords: bearing; block; capacity; central; column; compressive; concrete; cracks; diameter; figure; load; opening; strength
• Influence of carbonation on torrent air permeability of concrete by Jaskulski, Roman; Kubissa, Wojciech; Zapała, Dominika (2023) - kT5,t = kTm,m · e1.45(m−5), (1) kTm,t = kT5,t / e−1.45(m−5), (2) where: • m ... measured moisture content of concrete (in %), • kTm,m ... measured air permeability of concrete with moisture content equal to m % (before carbon- ation), • kT5,t ... theoretical air permeability of concrete with moisture content equal to 5%, • kT5,m ... theoretical air permeability of concrete with moisture content equal to m %. Keywords: Concrete, carbonation, air permeability, durability, torrent. Keywords: air permeability; carbonation; concrete; content; moisture; permeability; results; test; values

• Uranium foil neutron activation analysis by Kozic, Ján; Štefánik, Milan (2025) - The analysed foils can be used further in the education of students or in experimental applications such as measurements of neutron spectral indexes, neutron activation analysis of uranium ore or delayed neutron analysis. Keywords: Production rate, uranium foils, neutron activation analysis, gamma-ray spectrometry, Training Reactor VR-1, HPGe detector. Keywords: activation; analysis; foil; neutron; pr pr; reactor; standard; uranium
• FPU-Supported Running Error Analysis by Zahradnický, T.; Lórencz, R. (2010) - Running error analysis and error bounds Running error analysis [6, 7] is a type of a-posteriori forward error analysis. 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. Keywords: analysis; double; error; precision; result; rounding; running
• OPTIMIZING THE WELDING OF PLASTICS WITH THE USE OF DIFFERENTIAL SCANNING CALORIMETRY AND THERMOGRAVIMETRIC ANALYSIS by Ondruška, Michal; Drienovský, Marián; Čička, Roman; Marônek, Milan; Náplava, Antonín (2014) - Thermal welding methods have a number of advan- tages and disadvantages. The measured values can determine the optimal temperature parameters for plastic welding. Keywords: analysis; atmosphere; dsc; plastics; sample; welding
• INJECTION MOLDING AND STRUCTURAL ANALYSIS IN METAL TO PLASTIC CONVERSION OF BOLTED FLANGE JOINT BY CAE by Blaško, Marian; Tittel, Viktor; Náplava, Antonín; Ondruška, Michal (2014) - 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; fiber; injection; molding; stress
• The Risks of Investments in Transport Infrastructure Projects by Pokorná, O.; Mocková, D. (2002) - 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. Infrastructure development requires that project risks and responsibilities be assigned to the public or private entity that is best able to manage them. Keywords: analysis; construction; guarantees; project; revenue; risks; sector; traffic
• TESTING THE ACCURACY OF MEASURED VALUES IN CONTINUOUS LONG-TERM GEODETIC MONITORING by Vaněček, Jan; Štroner, Martin (2016) - Important coefficients of approximation curves of horizontal direction standard deviations. Standard deviation of horizontal direction for all tested reference points. Keywords: accuracy; analysis; angle; approximation; deviation; direction; distance; monitoring; reference; slope; values
• STRENGHT AND DYNAMIC ANALYSIS OF A STRUCTURAL NODE LIMITING THE MULTI-OUTPUT GEAR MECHANISM by Kačalová, Mária; Pavlenko, Slavko (2017) - The gear mechanism achieves high gear ratios. Keywords: double-output gear mechanism; gears; strength and dynamic analysis. Keywords: analysis; contact; figure; gear; mechanism; output; stage; strength
• TUNNEL PORTAL INSTABILITY IN LANDSLIDE AREA AND REMEDIAL SOLUTION: A CASE STUDY by Farhadi Ayoublou, Farhad; Taromi, Majid; Eftekhari, Abbas (2019) - This requires a good understanding of the interaction between the landslide and tunnel excavation, which must be investigated in terms of controlling displacements and the effects of stress through long-term monitoring and numerical analyses. FLAC3D - Fast Lagrangian Analysis of Continua in 3 Dimensions, 2005. 447 http://dx.doi.org/10.1007/s10346-012-0326-8 http://dx.doi.org/10.1016/j.tust.2007.12.005 Acta Polytechnica 59(5):435–447, 2019 1 Introduction 2 General geology 2.1 Geology of study area 3 Geotechnical study 4 Slope stability analysis 4.1 Limit equilibrium analysis 4.2 Numerical analysis 4.3 Slope stability analysis results 5 Slope instability monitoring 6 Tunnel collapse and slope failure 7 The survey phase 7.1 Slope topography and geometry 7.2 Geology 7.3 Hydrology 7.4 History of landslides and tunnel excavation 7.5 Geophysical studies 8 Remedial solution 8.1 Passing through the collapsing area of the tunnel 8.2 Slope improvement 8.3 Debris flows 8.4 Filling the collapsing cavity 8.5 The tunnel excavation method 8.6 Monitoring stages 9 Discussion and conclusion Acknowledgements References Keywords: analysis; area; fault; figure; instability; landslide; portal; slope; slope stability; tunnel; tunnel excavation; tunnel portal
• EVALUATION OF RAILWAY BALLAST LAYER CONSOLIDATION AFTER MAINTENANCE WORKS by Sysyn, Mykola; Nabochenko, Olga; Kovalchuk, Vitalii; Gerber, Ulf (2019) - Keywords: ballast layer consolidation; tamping machines; seismic method; impulse response interpre- tation; signal processing; feature selection; classification; clustering. Monitoring methods of ballast layer consolidation Keywords: analysis; ballast; ballast consolidation; ballast layer; consolidation; degree; frequency; layer consolidation; measurements; methods; railway; response; signal; track; wave
• COMMON CROSSING CONDITION MONITORING WITH ON BOARD INERTIAL MEASUREMENTS by Sysyn, Mykola; Nabochenko, Olga; Gerber, Ulf; Kovalchuk, Vitalii; Petrenko, Oleksiy (2019) - The maximal values are used as spectral kurtosis features. Time domain and spectral features from vertical acceleration (above) and wavelet coefficients (down) Abbr. Keywords: acceleration; analysis; condition; crossing; features; figure; frequency; indicator; lifetime; measurement; monitoring; railway; spectral; track; wavelet
• A COMPARISON OF TWO MODAL ANALYSIS METHODS: AN IMPACT HAMMER VERSUS LASER VIBROMETRY by Krejčí, Jakub; Beneš, Petr (2020) - Firstly, narrow band analogue filters were applied for the evaluation of modal analysis, but then, FFT analysers became more used owing to the evolution of measurement systems. Nowadays, computers have a high computing performance and a model including modal analysis or other parameters can be performed in a short time and it can be compared with a real measurement [4]. Keywords: analysis; beam; comparison; excitation; measurement; modal; results; static
• OOFEM – An Object Oriented Framework for Finite Element Analysis by Patzák, B.; Bittnar, Z. (2004) - A typical example is stiffness matrix computation, which can be done already at the abstract level, provided that methods for computing the geometrical matrix and material stiffness are declared in an interface specifica- tion – they are only declared as abstract (virtual), and imple- mentation is left to derived classes representing particular fi- nite elements. Derived classes typically represent a finite element node or an element side, possess- ing some DOFs. Keywords: analysis; class; classes; element; finite; material; object; problem; vol
• Use of thermal analysis for the detection of calcium oxalate in selected forms of plastering exposed to the effects of Serpula lacrymans by Cígler Žofková, Drahomíra; Frankl, Jiří; Frankeová, Dita (2021) - The most pronounced bands (peaks) in the thermal analysis, corresponding to the first and second stages of calcium oxalate decomposition, were recorded in mortar samples exposed to the activity of Serpula lacrymans. In the case of mortar samples from Hrádek nad Ohří, bands that correspond to the presence of calcium oxalate were recorded (∼1630 cm−1, 1320 cm−1 and a weak band of ∼780 cm−1), whose library spectra in a pure form are shown in 5 (e). Keywords: analysis; calcium; decomposition; lacrymans; lime; mortar; oxalate; samples; serpula; wood
• Application of X-Ray Fluorescence Analysis in Investigations of Historical Monuments by Čechák, T.; Musílek, L.; Trojek, T.; Kopecká, I. (2005) - � is the fraction of the emitted photons collected within the detector solid angle, �(ES) is the detection efficiency at the fluorescence energy of the substrate ES; S is the density of the substrate; C is the density of the coating; and �S(E0) and �S(ES) are mass absorption coeffi- cients of the substrate at energies E0 and ES, respectively and �C(E0) and �C(ES) are the mass absorption coefficients of the coating at energies E0 and ES respectively Under this assumption, the fluorescence intensity ISF measured by the detector is given by I I E E E E SF S C i C S � � � � � 0 0 0 4 1 �� � � � � � � ( ) ( ) exp ( ) sin ( ) sin � f C S i S h E � � � � � � � �� � � � �� � � �� � � � �� � � � 1 1 0sin ( ) sin ( ) sin� � �i S S f E � where I0 is the intensity of the incident radiation, and � is the excitation factor for the respective X-ray line of the substrate. Keywords: analysis; fluorescence; fresco; pigments; ray; � �
• Experimental and statistical analysis of soil stabilization to avoid landfilling by Benrebouh, Imed; Douadi, Abdellah; Hafhouf, Ilyas; Merdas, Abdelghani; Meguellati, Abderrahim; Del Serrone, Giulia; Moretti, Laura (2025) - [In France; Effect of lime stabilization on geotechnical properties of clay soil]. https://doi.org/10.1051/e3sconf/202019503044 [64] S. Pourakbar, A. Maneshmoaveni, D. Moazami, et al. Stabilization of clay soil using alkali-activated sewage sludge. Keywords: analysis; chemical; clay; clayey; content; curing; days; figure; increase; lime; lime content; plasticity; soil; stabilisation; table; test; ucs

• Injection and Combustion of RME with Water Emulsions in a Diesel Engine by Cisek, J. (2010) - Diesel Fuel – standard diesel fuel, RME – rapeseed methyl ester, RME+10 % – emulsion 90 % RME+10 % water, RME+30 % – emulsion 70 % RME+30 % water Fig. 3: Fuel consumption Gh and specific fuel consumption ge at 1 600 rpm and BMEP=4 bar with different fuels Diesel Fuel – standard diesel fuel, RME – rapeseed methyl ester, RME+10 % – emulsion 90 % RME+10 % water, RME+30 % – emulsion 70 % RME+30 % water Fig. 4: Total efficiency at 1 600 rpm and BMEP=4 bar with different fuels The plot in Fig. Keywords: combustion; diesel; diesel fuel; emulsion; fig; fuel; injection; rme; water
• Prague’s Water Supply Station in Podolí — a Solution for the Problems of Clean Water in the 1930s by Drnek, K. (2011) - Water supply plant in Podoĺı and Antońın Engel. 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. Keywords: filters; plant; prague; water; water plant
• Lewatit S100 in Drinking Water Treatment for Ammonia Removal by El-Hady, H. M. Abd; Grünwald, A.; Vlčková, K.; Zeithammerová, J. (2001) - 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: Lewatit S100, ion exchange, ammonia removal, drinking water. Keywords: nh4; water
• Evaluation of Water Resistance and Diffusion Properties of Paint Materials by Drchalová, J.; Poděbradská, J.; Maděra, J.; Černý, R. (2001) - D m Rd S M T C BA 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 BA T, � � � �10 , (10) A = 2900 K, B = 24.738, C = –4.65. Therefore, it appears reasonable to define the in- tegral capillarity Cint (see, e.g., [2–4]) � � � � � �C t C m t m S t d int � � � � � � 0 d , (2) where m is the mass of the moist specimen, and md is the mass of the dried specimen. Keywords: capillarity; paint; water; � �
• Clinoptilolite in Drinking Water Treatment for Ammonia Removal by El-Hady, H. M. Abd; Grünwald, A.; Vlčková, K.; Zeithammerová, J. (2001) - 1 Solution volume – L 50 61 72 82 88.5 NH4 � eff. – mg l�1 0.06 0.088 0.094 0.29 0.503 BV 500 610 720 820 885 Table 2: Important parameters measured during the experiment using tap water spiked with ammonia Materials Clino. The processes used for the removal of ammonium ions from drinking waters include air stripping, nitrification, breakpoint chlorination, and ion exchange. Keywords: clino; nacl; nh4; water
• EFFECT OF PVA MODIFICATION ON PROPERTIES OF CEMENT COMPOSITES by Topič, Jaroslav; Prošek, Zdeněk; Indrová, Kateřina; Plachý, Tomáš; Nežerka, Václav; Kopecký, Lubomír; Tesárek, Pavel (2015) - Discussion The reduced workability of PVA-rich cement pastes is caused by the high viscosity of the PVA solution. The increase in PVA-rich samples (DS), in comparison with PVA-poor samples (BS) as demonstrated in Figure 14, confirms the hardening mechanism theory proposed by some authors [4, 7, 8]. Keywords: cement; et al; figure; modulus; pastes; properties; pva; sample; strength; vol; water
• Formation of Haloforms during Chlorination of Natural Waters by Grünwald, A.; Šťastný, B.; Slavíčková, K.; Slavíček, M. (2002) - Sampling place 1 2 3 4 5 1 DOC (mg �l�1) 15.9 6.55 8.15 9.33 9.53 CODMn (mg �l�1) 22.7 8.00 10.70 11.00 10.7 A254 (cm�1) 0.685 0.25 0.327 0.385 0.376 2 DOC (mg �l�1) 6.55 3.51 6.00 7.20 10.91 CODMn (mg �l�1) 14.40 8.00 4.60 9.30 7.00 A254 (cm�1) 0.483 0.278 0.131 0.327 0.245 3 DOC (mg �l�1) 10.69 6.29 10.23 16.55 5.73 CODMn (mg �l�1) 14.00 10.00 15.50 22.00 8.90 A254 (cm�1) 0.445 0.263 0.446 0.748 0.231 4 DOC (mg �l�1) 4.62 6.79 2.07 3.92 4.55 CODMn (mg �l�1) 5.60 8.60 1.90 4.20 4.70 A254 (cm�1) 0.185 0.269 0.061 0.140 0.146 Tab. 4: Content of organic compounds in water samples from the Flaje catchment Formation and its relation to specific ultraviolet absorbance. 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 Keywords: disinfection; formation; nom; water
• DETERMINATION OF WATER CONTENT IN PYROLYTIC TARS USING COULOMETRIC KARL-FISHER TITRATION by Jílková, Lenka; Hlinčík, Tomáš; Ciahotný, Karel (2017) - 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: content; determination; fischer; karl; pyrolysis; tar; titration; water; water content
• CHARACTERIZATION OF SELECTED PROPERTIES OF COMPOSITES OF WASTE PAPER WITH UNTREATED BAMBOO STEM FIBRE AND RICE HUSK by Yusuf, Taofeek Ayotunde (2017) - In this study, selected properties of composite samples, produced from waste paper in equal mix-ratio with rice husk and bamboo stem fibres (BSF) separately without chemical pre-treatment using cassava starch as a binder, were characterized. Keywords: biocomposite properties; waste paper; bamboo stem fibre; rice husk. Keywords: bamboo; composites; fibres; husk; paper; properties; rice; samples; strength; thickness; waste; water
• Heavy Load Rollers in Logistic Systems by Künne, B.; Mehlan, V.; Langenohl, A. (2003) - No. 412002 broad dimensioning; 800 N per cm wheel widths und 100 mm outer-@ depending on p adjustment by brake difference of speed set point and actual speed value contribution of intermediate material and the amount testing time fixed on 24 h 5 Results of research Using heary load wheels, abrasion occurs basically inde- pendently of the individual case and also independently of the boundary condit.ions Due to space and costs, heavy load wheels are always used at their mechanical load limit. Keywords: abrasion; bandage; load; material; severin; und; verlag; water; wear; wheel
• MECHANICAL PROPERTIES OF RAMMED EARTH WITH RESPECT TO CLAY MIXTURE COMPOSITION by Plaček Otcovská, Tereza; Mužíková, Barbora; Padevět, Pavel (2019) - 3. Results and Discussion There were minimally 4 test specimens for every ten- sile bending strength and compressive strength tests. Tensile bending strength test specimens were 40×40×160 mm each. Keywords: bending; clay; compressive; earth; mixtures; mpa; specimens; strength; tensile; test; water
• Mechanical, Hygric and Thermal Properties of Flue Gas Desulfurization Gypsum by Tesárek, P.; Drchalová, J.; Kolísko, J.; Rovnaníková, P.; Černý, R. (2004) - [m], S the specimen surface being in contact with the water vapor [m2], � the period of time corre- sponding to the transport of mass of water vapor �m [s], �pp the difference between the partial water vapor pressure in the air below and above the specimen [Pa], R the universal gas constant [J mol�1 K�1], M the molar mass of water Flue gas desulfurization of one power station block creates up to 20 t of FGD gypsum per hour. Keywords: cup; czech; fgd; gypsum; moisture; properties; strength; vapor; water
• Extraction of Alkali Ions Investigated by Conductometric and pH Measurements by Kalvoda, L.; Klepáček, R. (2006) - The following stability constants were calculated from the obtained conductivity data, using relation (2): KNa� � 7.3×10�7, KK� � 6.5×10�8, KCa2� � 1.6×10�5, KMg2�: no measurable reaction. CA OCH COOEt H Cl CA OCH COOH EtCl� � � � � � � � 2 2 . Keywords: concentration; fig; solutions; tbt; water; � �
• The Symbolic-Aesthetic Dimension of Industrial Architecture as a Method of Classification and Evaluation: the Example of Bridge Structures in the Czech Republic by Popelová, L. (2007) - 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: aesthetic; architecture; bridge; buildings; czech; fig; prague; structures; svatopluk; technical; water; works

• Fractality of Fracture Surfaces by Ficker, T. (2010) - Keywords: fractal dimension, fracture surfaces, porous materials, compressive strength. 2.1 Fractal porosity The large class of porous materials possesses at least one common feature, namely, they are composed of grains (particles, globules, etc.) of microscopic size l. The grains are usually arranged fractally with num- ber distribution N(l) and fractal dimension D N(l) Keywords: fractal; fracture; strength
• The Effect of Strain Rate on the Mechanical Properties of Automotive Steel Sheets by Német, Miroslav; Mihaliková, Mária (2013) - Dynamic tensile testing of sheet steels is growing in importance. High speed tensile test of steel sheets for the stress-strain curve at the intermediate strain rate. Keywords: dynamic; steel; strain; strength; tensile
• A COMPARISON OF THE TENSILE STRENGTH OF PLASTIC PARTS PRODUCED BY A FUSED DEPOSITION MODELING DEVICE by Beniak, Juraj; Križan, Peter; Matúš, Miloš (2015) - This again points to the brittleness of the model produced from ABS plastic material using FDM technology. There are measurements where tensile strength values are reached that similar to the average values presented in Table 3. Keywords: degrees; direction; fibers; fig; layers; orientation; strength; tensile
• THE EFFECT OF DIFFERENT FORMS OF OXYGEN ON PROPERTIES OF BETA TITANIUM ALLOYS by Málek, Jaroslav; Hnilica, František; Bartáková, Sonia; Míka, Patrik; Veselý, Jaroslav (2018) - Titanium powder oxidation has been used for this purpose. Titanium powder oxidation has been used for this purpose. Keywords: content; oxidation; oxygen; oxygen content; powder; specimens; strength; titanium; values
• EVALUATING SHEAR STRENGTH OF SAND- GGBFS BASED GEOPOLYMER COMPOSITE MATERIAL by Al-Rkaby, Alaa Hussein Jassim (2019) - In addition to the strength properties, studies car- ried out on geopolymer based soil showed that treated soils have a high durability In this paper, a series of unconfined compression and triaxial tests were conducted on sand and sand - ground granulated blast-furnace slag (GGBFS) based geopolymer. Keywords: activator; ash; content; geopolymer; ggbfs; sand; soil; strength
• THE INFLUENCE OF BASALT MINERALS AS CEMENT SUBSTITUTION MATERIALS IN MORTAR by Amin, Muhammad; Birawidha, David Candra; Isnugroho, Kusno; Hendronursito, Yusup; Sumardi, Slamet; Ario, Septa; Syafriadi, Syafriadi; Al-Muttaqii, Muhammad (2019) - The porosity and absorption properties of OPC cement mortar (a and b) and PCC cement mortar (c and d) with variation concentration of basalt. Compressive strength of OPC cement mortar with variations concentration. Keywords: absorption; basalt; calcination; cement; mortar; opc; porosity; powder; strength
• Superior Properties of Ultra-fine-grained Steels by Leinonen, J. I. (2004) - Numerous research projects to develop still better struc- tural steels, e.g. “ultra steels” or “super steels”, have been commenced all over the world since the mid-1990s, espe- cially in Asia (e.g. Japan, South Korea, China), Australia and Europe. 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: grain; impact; steels; strength; tncp; toughness
• SENSITIVITY ANALYSIS OF INPUT PARAMETERS FOR LOAD CARRYING CAPACITY OF MASONRY ARCH BRIDGES by Vokál, Marek; Drahorád, Michal (2020) - 85% of Czech masonry vault railway bridges are in a “good” structural state, 14% are in a “bad” structural state and 1% are in a serious, unsatisfactory structural state. A similar portion of masonry bridges can be found throughout the whole Europe. Keywords: bridges; coefficient; figure; lcc; load; masonry; parameters; strength; vault
• TESTING OF GLUED JOINTS ON PLASTIC PARTS MANUFACTURED USING FFF TECHNOLOGY by Suder, Jiří; Vocetka, Michal; Kot, Tomáš; Fojtík, František; Fusek, Martin (2020) - Tensile failure strength and separation angle of FDM 3D printing PLA material: Experimental and theoretical analyses. One of the possibilities of experimental determination of the strength of plastic samples produced on a 3D printer is through a tensile test. Keywords: adhesive; force; joints; material; orientation; samples; strength
• Performance characteristics of low carbon waste material to stabilise soil with extremely high plasticity by Al-Baidhani, Ali; Al-Taie, Abbas Jawad (2021) - Figure 7 highlights the variation of SP with BSD content; the LS values are also presented in Figure 7. Also, the effect of curing on the development of soil strength has been included. Keywords: bsd; bsdc; bsdf; carbon; content; ehps; figure; improvement; materials; mixtures; properties; soil; strength; swell
• Determination of loads on the body of a boxcar with elastic elements in the center sill by Fomin, Oleksij; Glib, Vatulia; Alyona, Lovska (2022) - Body of a boxcar with elastic elements in the centre sill. The authors suggest elastic elements in the body of a centre sill being the basic carrying element of the frame to decrease the dynamic loads. Keywords: body; boxcar; centre; elements; figure; loads; sill; strength
• Evaluation of residual strength of polymeric yarns subjected to previous impact loads by Hahn, Gabriela; Monteiro da Fonseca Thomé da Silva, Antônio Henrique; Tempel Stumpf, Felipe; Marcos Guilherme, Carlos Eduardo (2022) - 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: impact; load; materials; pet; samples; strength; tensile; tests; ybl
• Some Effects on Fatigue Strength by Brož, P. (2006) - If �2 � �2 is the fatigue limit under a zero to tensile stress loading cycle, then P P S S S Py z x2 3 2 1 20, , , , ,� � � �� � , (13) therefore A � ��� �2 2 2 3 , (14) from which � � � � � � � �� �� 2 3 11 2 . 1; it follows that � � �max � �m (1a) � � �max � �m . Keywords: fatigue; limit; mean; strength; stress; � m; � �
• Parametric optimisation of friction stir welding on aluminium alloy (EN AW-1100) plates by Awan, Muhammad Umer Farooq; Khan, Mahmood; Waheed, Khalid; Iqbal, Zafar; Rehman, Abdul; Ali, Fahad; Shahzad, Muhammad; Saim, Muhammad Abdul Basit; Akhtar, Shahid; Aune, Ragnhild Elizabeth (2023) - Effect of tool rotational speed on the microstructure and mechanical properties of bobbin tool friction stir welded 6082-T6 aluminum alloy. [23] J. Victor Christy, A.-H. Ismail Mourad, M. M. Sherif, B. Shivamurthy. Keywords: alloy; figure; friction; fsw; hardness; materials; parameters; probe; results; speed; stir; strength; tensile; tool; traverse; welding; zone
• Mechanical and physical properties of cement mixtures for 3D processing by Litoš, Jiří; Šána, Vladimír; Uhlík, Adam; Kolář, Karel; Nguyen, Markéta (2023) - 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. This production method has started to develop very fast, which brings the need to design a suitable composition of mixture for this tech- nology. Keywords: cement; figure; materials; mixture; printing; processing; properties; strength; values
• Monitoring the internal structure behaviour of alkali-activated slag paste: effect of the curing mode by Nápravník, Petr; Kocáb, Dalibor; Bílek, Jr., Vlastimil; Lisztwan, Dominik; Kucharczyková, Barbara (2023) - For the purposes of the experiment, three test sets (for the measurement of resonant frequencies and mass losses) and nine additional test sets (for strength tests) were made, each set containing three specimens. Experiment details Three groups of test specimens from alkali-activated slag differing only in the curing regime were prepared for this experiment. Keywords: age; cracks; days; decrease; development; paste; set; slag; specimens; strength; test
• Experimental investigation of polyurethane-coated HPFRC panels under direct contact blast by Měrková, Alžběta; Kheml, Přemysl; Perrot, Alexandre; Hála, Petr (2025) - tal studies to examine the behaviour and response of HPFRC panels under various loading conditions. HPFRC panels with protective coatings, using polyurethane (PU) to enhance the resistance against ballistic loading, were investigated in [3, 4]. Keywords: blast; coating; figure; hpfrc; hpfrc panels; panels; polyurea; strength; test

• Multigroup Approximation of Radiation Transfer in SF6 Arc Plasmas by Bartlova, Milada; Aubrecht, Vladimir; Bogatyreva, Nadezhda; Holcman, Vladimir (2013) - 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; coefficients; emission; mean; planck; plasma; radiation
• Computer Simulation of a Plasma Vibrator Antenna by Bogachev, Nikolay N.; Bogdankevich, Irina L.; Gusein-zade, Namik G.; Tarakanov, Vladimir P. (2013) - 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; metal; plasma; radiation
• The Process of Plasma Chemical Photoresist Film Ashing from the Surface of Silicon Wafers by Bordusau, Siarhei; Madveika, Siarhei; Dostanko, Anatolii (2013) - 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. In order to improve the efficiency of microwave plasma chemical ashing of photoresist films from the surface of silicon wafers a two-stage process of treating was developed. Keywords: ashing; chemical; discharge; microwave; photoresist; plasma; wafers
• Local Magnetohydrodynamic Characteristics of the Plasma Stream generated by MPC by Cherednychenko, Tatyana N.; Garkusha, Igor E.; Chebotarev, Vladimir V.; Solyakov, Dmytro G.; Petrov, Yuriy V.; Ladygina, Maryna S.; Eliseev, Dmytro V.; Chuvilo, Alexander A. (2013) - The spatial distributions of the electric current in plasma stream for the second operation mode; a) 6 µs, b) 10 µs. Figure 5. Discharge characteristics and dynamics of compressive plasma streams generated by a compact magnetoplasma compressor. Keywords: current; plasma; plasma stream; stream
• Inactivation of Candida albicans by Corona Discharge: The Increase of Inhibition Zones Area After Far Subsequent Exposition by Fantova, Vladyslava; Bujaček, Karol; Kříha, Vítězslav; Julák, Jaroslav (2013) - 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: dish; expositions; inhibition; plasma; treatment; zone
• Calculation of the Inductance of Plasma Column at PF-1000 Device with Assumed Current Distribution by Kortanek, Jiri; Kubes, Pavel (2013) - 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: column; current; inductance; plasma; shot
• X-ray Spectroscopic Characterization of Shock-Ignition-Relevant plasmas by Šmíd, Michal; Antonelli, Luca; Renner, Oldoich (2013) - 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: electrons; laser; plasma; ray; shock; target
• Stimulated Raman Backscattering in Plasma — a Promising Tool for the Generation of Ultra-High Power Laser Beams by Turčičová, Hana; Huynh, Jaroslav (2013) - 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; beam; laser; plasma; pulse; pump; raman; seed
• Ignition Features of Plasma-Beam Discharge in Gas-Discharge Electron Gun Operation by Tutyk, Valery A.; Ovcharuk, Anatoliy N.; Gasik, Michail I.; Maslenikov, Dmitriy V. (2013) - The mea- surements of concentration of PBD plasma electrons were carried out under conditions of increasing pres- sure and they showed that electrons concentration was within the range of ne ≈ 1010 ÷ 1011 cm−3. where νen is collision frequency of plasma electrons with neutrals, ωpe = 5.64 × 104n 1/2 e is Langmuire electron frequency of plasma. Keywords: beam; discharge; electron; gas; ignition; pbd; plasma; vacuum
• Emittance Characterization of Ion Beams Provided by Laser Plasma by Velardi, Luciano; Side, Domenico Delle; Marco, Massimo De; Nassisi, Vincenzo (2013) - Laser ion sources offer the possibility to obtain ion beams useful for particle accelerators. Keywords: LIS source, ion beam, emittance. Keywords: beams; emittance; ion; laser; plasma; voltage
• THE SZ EFFECT IN THE PLANCK ERA: ASTROPHYSICAL AND COSMOLOGICAL IMPACT by Colafrancesco, Sergio (2013) - 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: cluster; cmb; colafrancesco; distribution; electron; emission; frequency; galaxy; observations; planck; plasma; polarization; spectrum; sze; thermal
• DISC ATMOSPHERES AND WINDS IN X-RAY BINARIES by Díaz Trigo, Maria; Boirin, Laurence (2013) - 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: disc; et al; line; lmxbs; plasma; wind
• STRUCTURING OF DIAMOND FILMS USING MICROSPHERE LITHOGRAPHY by Domonkos, Mária; Ižák, Tibor; Štolcová, Lucie; Proška, Jan; Demo, Pavel; Kromka, Alexander (2014) - 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 Generally, various nanostruc- tures can be fabricated from diamond films known as nanowires, nanorods, nanoneedles, etc. Keywords: diamond; etching; films; mask; plasma; structuring
• INHIBITION OF CANDIDA ALBICANS GROWTH ON SURFACES TREATED BY DIELECTRIC BARRIER DISCHARGE WITH VARIOUS BARRIERS by Sláma, Jan; Kríha, Vítezslav (2014) - Keywords: low temperature plasma, dielectric barrier discharge, inhibition, Candida albicans, treat- ment, biological surface. Cultivation, logging and storing After plasma surface treatment, the agar wafers were stacked on an empty Petri dish (Fig. 4) which was placed into the thermostatic chamber. Keywords: agar; albicans; barrier; discharge; inhibition; plasma
• EXPERIMENTAL CHARACTERIZATION OF AN OVERDENSE PLASMA IN A COMPACT ION SOURCE by Castro, Giuseppe; Mascali, David; Romano, Francesco Paolo; Altana, Carmen; Caliri, Claudia; Celona, Luigi; Di Giugno, Rossella; Gambino, Nadia; Lanaia, Davide; Miracoli, Rosalba; Musumarra, Agatino; Neri, Lorenzo; Torrisi, Giuseppe; Gammino, Santo (2015) - This mechanism is commonly called Electron Cyclotron Resonance (ECR), and it enables ECR plasmas to be generated and sustained. References [1] R. Geller, Electron Cyclotron Resonance Ion source and ECR plasmas: Inst. Keywords: cut; density; ebw; electron; field; frequency; ion; plasma; waves
• IMMOBILISATION OF HUMIC SUBSTANCES USING PLASMA MODIFICATION by Hájková, Pavlína; Tichý, David; Čmelík, Jiří; Antoš, Petr (2015) - 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 0.5ml/min. Keywords: cd2; dbd; fabric; hss; humic; plasma; solution; substances
• TEARING MODES GROWTH RATE AMPLIFICATION DUE TO FINITE CURRENT RELAXATION by Mendonça da Silveira, Francisco Eugenio (2017) - Sov Phys Tech Phys 15:175, 1970. J Plasma Phys 79:45, 2013. Keywords: modes; phys; plasma; rate
• GAS-PUFF TARGET FOR LASER-PRODUCING PLASMA SXR SOURCE by Salačová, Šárka; Wachulak, Przemyslaw; Tatíček, Milan; Vrbová, Miroslava (2019) - Modeling of ns and ps laser-induced soft X-ray sources using nitrogen gas puff target. In Figure 6, we can see that if the pressure equals or is higher than P = 10bar, the mass density is stable for the new nozzle and an increase in gas pressure will not result in an increase in mass density. Keywords: density; gas; laser; mass; nozzle; plasma; puff; target

• Single Phase Voltage Source Inverter Photovoltaic Application by Bauer, J. (2010) - Keywords: voltage source inverter, L-C-L filter, hysteresis controller, pulse width modulation. Then the converter is supposed to generate output voltage with a sinusoidal shape, as in the supply network. Keywords: control; current; fig; filter; output; voltage
• Optimal Combustion Conditions for a Small-scale Biomass Boiler by Plaček, Viktor; Oswald, Cyril; Hrdlička, Jan (2012) - However, a smaller combustion chamber leads to issues with combustion process control. 2 Experimental arrangement and deployment The basic arrangement used for combustion control of small-scale biomass boilers is depicted in Figure 1. Keywords: biomass; boiler; combustion; control; scale
• Simulation of a Matrix Converter Fed Drive With Sliding Mode Control by Bauer, Jan (2012) - Let us to investigate the existence condition for sliding mode torque control. Principle of sliding mode torque control. Keywords: control; converter; current; machine; mode; state; torque; vector; voltage
• FORMATION CONTROL OF MULTIPLE UNICYCLE-TYPE ROBOTS USING LIE GROUP by Dong, Youwei; Rahmani, Ahmed (2016) - Lie algebra application to mobile robot control: a tutorial. [xI , yI ]T position of robot in frame FI gi ∈ SE(2) configuration of local frame attached to robot- i relative to frame FI gij configuration of robot-j relative to the local frame attached to robot-i ḡij desired configuration of robot-j relative to robot-i B = (0, r) the centre of a circle of which the radius is |r| A = [x, y]T position of robot gi in frame O′X Keywords: configuration; control; formation; frame; group; lie; robot; unicycle
• Non Linear Modelling and Control of Hydraulic Actuators by Šulc, B.; Jan, J. A. (2002) - Fuzzy controllers have the disadvantage that it is difficult to tune the large number of parameters, in contrast to the proportional derivative (PD) controller, which can be expres- sed by the equation: u K e K ePD P D� � � (11) where uPD is the control signal, e the control error, and the constants KP, KD represent proportional and derivate constants. 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: control; fig; oil; � �
• MATHEMATICAL ALGORITHM OF FUZZY LOGIC CONTROLLER FOR MULTILEVEL INVERTER CREATING VERTICAL DIVIDED VOLTAGE by Can, Erol (2019) - Therefore, some control methods as a PID controller and Fuzzy logic controller has been used to control the power electronic circuits [9, 18]. [18] Ismail H Altas, Adel M Sharaf“A generalized direct approach for designing fuzzy logic controllers in Matlab/Simulink GUI environment“ International Journal of Information Technology and Intelligent Computing, no.4 vol.1: 2007. Keywords: control; converter; error; figure; fuzzy; inverter; level; logic; voltage
• Dynamics of Micro-Air-Vehicle with Flapping Wings by Sibilski, K. (2004) - In the case when we consider the model of a entomopter treated as a mechani- cal system containing a rigid fuselage and n rigid wings fixed to the fuselage by means of three hinges, the vector general- ised co-ordinates have the following form (Fig. 3): � �q � x y zs s s n n n T, , , , , , , , , , , , , ,� � � � � � � � �1 1 1� � � . i i i� � � 0 0 0 0� � � � � . Keywords: aerodynamic; body; control; flapping; flight; h �; motion; t �; wing; � q; � v; � w; � �
• Implementation of a Microcode-controlled State Machine and Simulator in AVR Microcontrollers (MICoSS) by Korbel, S.; Jáneš, V. (2005) - 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: bits; control; czech; device; fig; level; machine; simulator; state; state machine
• Results of research on backlash compensation in a power electric drive by low-power electronic device by Samsonovich, Semen L.; Fedotov, Boris K.; Rozhnin, Nikolay B.; Goryunov, Roman V. (2022) - Keywords: Backlash, backlash compensation device, multi-motor drive, tandem control. Backlash compensation device with cross connections The disadvantage of the known method of backlash compensation, based on the introduction of displace- Figure 4. Keywords: backlash; backlash compensation; control; device; displacement; drive; electric; figure; signal; torques
• ADAPTIVE WAVELETS SLIDING MODE CONTROL FOR A CLASS OF SECOND ORDER UNDERACTUATED MECHANICAL SYSTEMS by Nafa, Fares; Boudouda, Aimad; Smaani, Billel (2021) - Nowadays, wavelets theory was successfully applied to multi-scale analysis and synthesis, time-frequency signal analysis in signal processing as well as in nonlinear control system design [28]. In this work, an adaptive controller using sliding mode control (SMC) and wavelets network (WN) is proposed for a class of second-order UMS with two degrees of freedom (DOF). Keywords: adaptive; approximation; control; controller; mode; nonlinear; smc; systems; ums; wavelets
• Feedback Control in an Atomic Force Microscope Used as a Nano-Manipulator by Hrouzek, M. (2005) - 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 This paper offers a concise survey of the most commonly used feedback loops for atomic force microscopes. 6 shows control loops affecting the sensitivity of the AFM. Keywords: afm; cantilever; control; fig; force; noise
• Design of a Predictive Hierarchical Controller Using FEMLAB by Rehák, B. (2006) - ( )� �� �D j x t u t D f x t u t tx x � � � �0 � �D j x t u t D f x t u t tu u( ), ( ) ( ), ( ) ( )� with boundary conditions defined as follows: x T x T TH ( ) ( ) � � � 0 0� while the value of the state at the end of the interval (T, TH) and also the value of the co-state at time T are not defined. The matrices Q, R in the upper-level cost functional were chosen such that q1 � q2 � 10, r1 � r2 � 0.2. Keywords: control; level; opt t; t t; u t; � �
• Identification and Predictive Control by p-norm Minimization by Pekař, J.; Štecha, J. (2006) - x Ax b Ax b Ax b� � � � � � �� y y y y1 1 , (14) where 1 � [ , , , ]1 1 1� T is the unit vector. We are looking for the parameter vector � �x � a a b b T 1 2 0 1, , , , ,� � that ensures the best approximation of the output vector � �b � � � �y t y t y t m T( ), ( ), , ( )1 1� by a vector Ax, where A � � � � � � � � � y t y t u t y t y t u t ( ) ( ) ( ) ( ) ( ) ( ) 1 2 2 3 1 � � � � � � � � � � � � � . Keywords: control; k �; norm; p �; r �; � y; � �
• The Influence of PZT Actuators Positioning in Active Structural Acoustic Control by Švec, P.; Jandák, V. (2007) - [1] for the clamped sides (at x � 0 and x a� ) � � � � 2 2 3 30 0 u x u x � �, (4) and for the free sides (at y � 0 and y � b) The total power � radiated by a planar source, e.g., a vi- brating panel, is proportional to the normal velocity of its sur- face, and can be expressed as �( ) ( , ) � � � � � � � � � �� � �� � ��0 0 2 2 2 2 28 c k V k k k k k k k z 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: actuator; control; plate; � �

• Prerequisites for Increasing the Axle Load on Railway Tracks in the Czech Republic by Lidmila, M.; Horníček, L.; Krejčiříková, H.; Tyc, P. (2008) - Axle load to 250 kN, S49 rails may be used only for ver- tical rail head wear of up to 20 mm in track beds with loading capacity coefficients of 100 MPa�1 and more. For loading by 300 kN, the requirements are met only by track beds with loading capacity coefficients of 100 MPa�m�1 and more. Keywords: axle; bed; load; track
• Singularities in Structural Optimization of the Ziegler Pendulum by Kirillov, O. N. (2011) - 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: flutter; load; mass; optimization; pendulum; stability
• EFFECT OF SLIP VELOCITY ON THE PERFORMANCE OF A SHORT BEARING LUBRICATED WITH A MAGNETIC FLUID by Patel, Rachana U.; Deheri, G. M. (2013) - Keywords: short bearing, magnetic fluid, slip velocity, load carrying capacity. The distribution of load carrying capacity with re- spect to magnetization µ∗ for various values of m, s, L/h2 and h2/B is presented in Figures 2–5. Keywords: bearing; capacity; load; magnetic
• Structural Design Using Simulation Based Reliability Assessment by Vukazich, S.; Marek, P. (2001) - In this manner, the deformation of the tank can be expressed as: � � � � � �u x t x Z t, � � . 11 and the fundamental period, T, of the elevated tank structure: � � � �S L L m S m Sab a a� � �ü max * *� � � . Keywords: fig; load; probability; reliability; structure; tank; variable; � �
• A STUDY OF FERROFLUID LUBRICATION BASED ROUGH SINE FILM SLIDER BEARING WITH ASSORTED POROUS STRUCTURE by Munshi, Mohmmadraiyan M.; Patel, Ashok R.; Deheri, Gunamani B. (2019) - Profile of load bearing capacity with regards to µ∗, σ and ε for the comparison of e and ψ∗. ε Load bearing capacity calculated for (µ∗ = 0.02, α = 0.01, σ = 0.03, ψ = 30, 1/β1 = 0.01, l∗ = 1.75, e = 0.15, ψ∗ = 0.02) Result for assorted porosity Result for conventional porosity -0.02 0.1692074 0.1602794 -0.01 0.168718 0.1598716 0 0.1682335 0.1594672 0.01 0.1677536 0.1590663 0.02 0.1672784 0.1586686 Table 4. Profile of load bearing capacity with re- gards to µ∗. (a). Keywords: bearing; capacity; ferrofluid; film; load; lubrication; slider
• CYLINDRICAL ROLLER BEARING LUBRICATION REGIMES ANALYSIS AT LOW SPEED AND PURE RADIAL LOAD by Chmelař, Jakub; Petr, Karel; Mikeš, Petr; Dynybyl, Vojtěch (2019) - Conclusions The study enabled an insight into the sensitivity of the roller bearing inner load distribution and lubrication regimes to the variation of the operating conditions. Contact pressure and lubrication film thickness distribution. Keywords: bearing; clearance; contact; distribution; effect; figure; film; load; lubricant; lubrication; roller; rolling; speed
• THE EFFECT OF SOIL GRAIN SIZE ON THE DEFORMATION PROPERTIES OF REINFORCED GEOCELL LAYERS by Luňáčková, Barbara; Mohyla, Marek; Pinka, Miroslav (2019) - Many researchers have observed the bearing capac- ity of geocell reinforced soils (e.g., [5, 6, 15, 16, 18–20]). The effect of the loading plate size and other factors on the response from geocell reinforced backfill was inves- tigated by Mehrjardi Keywords: aggregate; backfill; deformation; geocell; load; modulus; plate; ratio; size; soil; test
• THE USE OF THE TWO-HANDED COLLABORATIVE ROBOT IN NON-COLLABORATIVE APPLICATION by Vocetka, Michal; Suder, Jiří; Huczala, Daniel (2020) - 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: applications; case; collaborative; human; load; production; robot; solution; yumi
• Post-impact mechanical characterization of HMPE yarns by Belloni, Eduarda da Silva; Clain, Fernanda Mazuco; Guilherme, Carlos Eduardo Marcos (2021) - Impact load setting Table 3 shows the results of impact tests for different loads, shown in terms of percentage of the YBL, from a height of 300mm. Conclusions This study demonstrates that the mechanical be- haviour of a material changes when it is subjected to impact loads. Keywords: fatigue; figure; hmpe; impact; load; samples; tests; virgin; yarns; ybl
• Cyclic response of RC beam-column joints strengthened with transverse steel bars and with C-FRP diagonal ties by Golias, Emmanouil; Vougioukas, Emmanouil A.; Wittemann, Klaus; Kalogeropoulos, George I.; Karayannis, Chris (2022) - An analytical review of state-of-the-art interventions to RC beam column joints with FRP has been also reported [12]. In recent experimental techniques [13–17], external FRP flexural ropes have been used as an additional diagonal reinforcement to existing beam column joints. Keywords: beam; capacity; column; cyclic; damage; figure; load; loading; reinforcement; specimen; test
• Experimental study of the torsional effect for yarn break load test of polymeric multifilaments by da Cruz, Daniel Magalhães; Clain, Fernanda Mazuco; Guilherme, Carlos Eduardo Marcos (2022) - 548 Acta Polytechnica 62(5):538–548, 2022 1 Introduction 2 Materials and methods 2.1 Multifilament materials and torsion conditions 2.2 Linear density test, Tex 2.3 Yarn Breaking Load test 2.4 Curve parameterization for optimal point 2.5 Relationship between optimum twist and linear density 3 Results and discussions 3.1 Linear density for multifilaments 3.2 Yarn Breaking Load for torsion groups 3.3 Determination of the optimal torsion group 3.4 YBL results for optimal torsion 3.5 Curve ratio for optimal torsion and Tex 4 Conclusions Acknowledgements References 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: breaking; density; hmpe; linear; load; metre; polyamide; polyester; torsion; turns; twist
• Problems in Different Measuring and Assessment the Modulus of Deformation Using the Czech and German Methodologies by Lidmila, M.; Horníček, L.; Krejčiříková, H.; Tyc, P. (2006) - 3: Static modulus of deformation being measured on a layer of sand in the Klíčany sand pit Field labelling Mean natural moisture content in % Mean modulus of deformation in MPa ČD methodology DB methodology Field No. 1 8.7 82.2 136.8 Field No. 2 5.5 38.7 67.4 Table 4: Moduli of deformation on sand for each methodology Field labelling Mean natural moisture content in % Mean modulus of deformation in MPa ČD methodology DB methodology Field No. 1 12.7 92.1 66.3 Field No. 2 15.8 56.0 45.6 Table 5: Moduli of deformation on soil for each methodology The correlation coefficients of the moduli of deformation on sand are given in Table 8 and on soil in Table 9. 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 Keywords: deformation; load; methodology; moduli; mpa; plate
• Application of strut-and-tie models for assessing RC half-joints not complying with current code specifications by Kotsovou, Gregoria; Vougioukas, Emmanouil; Cotsovos, Demetrios M. (2022) - However, the experiment established that failure was preceded by yielding and/or rupture, in the region of the re-entrant corner, of not only the three 12 mm diameter U bars comprising tie T1, but also the four 12 mm diameter diagonal bars comprising tie T2 and the two-legged 10 mm diameter link closest to the re-entrant corner; moreover, the specimen suffered horizontal splitting of concrete in the compressive zone in the region of the nib (see Figure 4) Therefore, failure of the STM can only occur due to a failure of the weakest of ties T1, T2 and T3 relative to the force expected to develop when the beam’s VEXP is attained. Keywords: beam; figure; load; stm; tie
• Remapping and simulation of EFI system for SI engine using piggyback ECU by Diep, Hau Than; Nguyen, Gia Buu; Mohamad, Barhm (2023) - The equation relates the engine MAF to the manifold gas pressure (MAP), engine speed, and in- take manifold gas temperature. 2/2023 Remapping and Simulation of EFI System for SI Engine Using Piggyback ECU mass flow rate (MAF), engine speed, and intake man- ifold gas temperature (IAT) from engine performance testing [16]. Keywords: air; ecu; engine; figure; fuel; ignition; injection; load; pulse; simulation; speed; timing; width
• Settlement of piles with negative skin friction: design approaches according to part 3 of Eurocode 7 by Zemanová, Alena; Anderle, Vojtěch; Masopust, Jan (2025) - Keywords: Negative skin friction, load-settlement curves, pile settlement, pile design, soil settlement, Eurocode 7. 1. This plane divides the ground profile into consolidating and stable zones and designs a suf- ficient pile length to meet the design requirements, causing structural capacity and pile settlement to be affected by negative skin friction. Keywords: curve; friction; load; nsf; pile; pile settlement; plane; resistance; settlement; skin; skin friction; soil; soil settlement
• Concept for evaluating the safety of a dynamically loaded gearbox reducer by Hristovska, Elizabeta (2025) - Conclusion In this article, a concept for the safety evaluation of a dynamically loaded reducer (gear reducer) is presented. Keywords: Gearbox reducer, dynamically loading, reducer safety, reducer evaluation. Keywords: excavator; gear; gear pair; load; load capacity; reducer; safety; shaft; working
• Optimising load transfer using temporary supports in monolithic construction by Švolík, Milan; Makýš, Peter; Šťastný, Patrik; Ďubek, Marek (2024) - The disadvantages of this method of slab support include the increased use of supports and the occupation of a large area of the slab that could be used for the benefit of the construction. 2.5.3. Therefore, an important rule of thumb for ceiling slab support calculations is that the formwork on the recently cast slab is com- pletely removed and the new slab can immediately deflect under its own weight, and only then can the designer be sure that the actual weight of the floor is now transferred directly to the permanent support system of columns/walls, etc. and not to the form- work supports. Keywords: ceiling; construction; floors; formwork; load; slab; structure; supports; transfer
• Analysis of reticulated dome with universal connector by Gilodo, Oleksandr; Arsirii, Andrii; Somina, Yuliia (2025) - Keywords: Glued wood, reticulated dome, centric compression, eccentric compression, connector. Domes have significant architectural expressive- ness and uniqueness. Keywords: compression; diameter; dome; elements; figure; load; state; strain; structures; wood
• Evaluation and modelling of the buckling behaviour of SRC composite columns under simultaneous off-axis and lateral loading by Sadeghi, Kabir; Royaei, Javad; Nouban, Fatemeh (2025) - [12] investigated the effect of load eccentricity on the FRS-enclosed stress relationship of concrete columns. Effect of load eccentricity on the stress-strain relationship of FRP-confined concrete columns. Keywords: buckling; buckling load; columns; compressive; eccentricity; load; load eccentricity; load ratio; mode

• Influence of Oxidation Media on the Transport Properties of Thin Oxide Layers of Zirconium Alloys by Frank, H. (2007) - 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 n ex � � � . The mea- suring points could still be fitted to the second order polynomial I aU bU c� � �2 , but with negative coeffi- cient a. Keywords: air; current; voltage; zr1nb
• THE AUGER ENGINEERING RADIO ARRAY by Weidenhaupt, Klaus (2013) - 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. [2] use arrays of radio antennas to detect coherent VHF (10÷100MHz) radio emission from extensive air showers induced by cosmic rays. Keywords: aera; air; auger; cosmic; emission; pierre; radio
• DIFFUSE DBD IN ATMOSPHERIC AIR AT DIFFERENT APPLIED PULSE WIDTHS by Shershunova, Ekaterina Alexandrovna; Malashin, Maxim; Moshkunov, Sergei; Khomich, Vladislav (2015) - 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 Keywords: air; current; dbd; discharge; pulse; voltage
• NOx EMISSIONS FROM BUBBLING FLUIDIZED BED COMBUSTION OF LIGNITE COAL by Skopec, Pavel; Hrdlička, Jan; Opatřil, Jan; Štefanica, Jiří (2015) - Although GYC has a lower nitrogen content than CBC, it is more reactive and produces higher NOx emissions. As the fluidization velocity increases and the amount of secondary air decreases, there is an increase in NOx emissions. Keywords: air; bed; effect; emissions; nitrogen; nox; oxygen
• Thermal Comfort and Optimum Humidity Part 2 by Jokl, M. V. (2002) - 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; cooling; heating; room; ventilation; window
• The Impact of Odors by Jokl, M. V. (2002) - 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: air; building; co2; concentration; odor; person; smell; subjects; term; tvoc; vol
• Optimization of the Odor Microclimate by Jokl, M. V. (2002) - 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. 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 eTVOC � �36. Keywords: air; building; czech; fig; odor; person; rate; value; vol
• SPECIFIC FEATURES OF THE OXYFUEL COMBUSTION CONDITIONS IN A BUBBLING FLUIDIZED BED by Skopec, Pavel; Hrdlička, Jan (2016) - The maximum CO2 concentration in the flue gas during air combustion is not higher than 20%, but oxyfuel combustion can increase this concentration up to 90% in the dry state. Flue gases from oxyfuel combustion consist mainly of CO2 and water vapour (Fig. 2). Keywords: air; combustion; flue; gas; oxyfuel; v o; volume
• The Danger of Toxic Substances by Jokl, M. V. (2002) - 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. 2 Impact of toxic gases on the human organism Toxic strain depends on the kind of toxic agent (noxa) – each one usually has a specific impact on the human body (Fig. 2). Keywords: air; building; carbon; concentration; formaldehyde; gases; nitrogen; ozone; smoke; substances
• RETRACTED: POSSIBILITY OF MONITORING OF PAHs DISTRIBUTION IN THE VERTICAL PROFILE AT THE BACKGROUND METEOROLOGICAL STATION KREŠÍN by Strnadová, Gabriela; Hanuš, Vlastimil; Kahoun, David; Semerák, Petr; Tříska, Jan (2017) - 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. 6: The sum of heavier PAHs concentration (4-6ring) for each height. Keywords: air; analyser; atmospheric; concentration; doi:10.1016; figure; filters; height; hydrocarbons; loq; monitoring; ozone; pahs; period; polycyclic; sampling; tower; urban
• SURVEY OF SELECTED PROCEDURES FOR THE INDIRECT DETERMINATION OF THE GROUP REFRACTIVE INDEX OF AIR by Dvořáček, Filip (2018) - Keywords: group refractive index of air; electronic distance measurement; first velocity correction; laser tracker; Leica AT401. The article does not cover other approaches such as a multi-wavelength interferometry, frequency comb lasers, femto-second lasers etc. which can achieve direct measurement of refractive indices [2]. Keywords: air; ciddor; equations; group; index; leica; ppm; procedures; refractive
• Indoor Air Quality Assessment Based on Human Physiology - Part 1. New Criteria Proposal by Jokl, M. V. (2003) - [dB TVOC], (5) where �CO2 and �TVOC represent the concentrations of CO2 and TVOC. 1.6: The percentage of dissatisfied sedentary subjects as a function of the total volatile organic compound concen- tration (TVOC) above outdoors Sample TVOC [�g �m�3] Odor level [dTv] Study min mean max min mean max Living rooms and bedrooms old houses 130 200 240 21 30 34 Brown, Crump 1993 new houses 330 460 580 41 48 53 non-asthmatics 72 320 1600 8 40 75 Nordbäck et al 1993 asthmatics 67 540 8300 6 52 111 Office buildings a) without SBS during working hours 43 51 61 �3* 0 4 Ekberg 1993 during night-time 37 44 49 �6* �3* 0 during weekend 37 – – �6* – – b) with SBS (liquid process photo copiers) – 5000 90000 – 100 163 Broder et al 1993 SBS � Sick Building Syndrome * Keywords: air; co2; equation; fig; odor; tvoc
• Indoor Air Quality Assessment Based on Human Physiology - Part 3. Applications by Jokl, M. V. (2003) - The prescriptive requirements for the building, RB, determined from TVOC building emanation in this table by Equation R GB B i e� �TVOC TVOC TVOC36. 2.1 (p. 33), � iTVOC � indoor TVOC concentration Keywords: air; g �; h �; indoor; l �; quality; requirements; table; ventilation; vol; � m; � �
• MINIMIZATION OF TOXIC EMISSIONS DURING BURNING LOW-GRADE FUEL AT KAZAKHSTAN THERMAL POWER PLANT by Askarova, Aliya; Šafařík, Pavel; Nugymanova, Aizhan; Bolegenova, Saltanat; Maximov, Valeriy; Bolegenova, Symbat (2020) - Computational method for investigation of solid fuel combustion in combustion chambers of a heat power plant. Computational modeling of heat and mass transfer processes in combustion chamber at power plant of kazakhstan. Keywords: air; boiler; chamber; combustion; injectors; ofa
• On reducing CO2 concentration in buildings by using plants by Franek, Ondřej; Jarský, Čeněk (2021) - Keywords: Carbon dioxide, climate change, indoor greening, indoor air quality, building ventilation. Can houseplants improve indoor air quality by removing CO2 and increasing relative humidity? Keywords: air; co2; co2 concentration; concentration; environment; plants; ppm; supply

• Czech Participation in the INTEGRAL Satellite: A Review by Hudec, R.; Blažek, M.; Hudcová, V. (2011) - 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. Below we list a few examples of blazars analyzed with INTEGRAL observations. Keywords: cvs; czech; ibis; integral; omc; optical; ray
• Czech Participation in International X-Ray Observatory (IXO) by Hudec, R.; Pína, L.; Maršíková, V.; Inneman, A.; Skulinová, M.; Míka, M. (2011) - 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: czech; glass; ixo; optics; ray; technologies; wafers
• The Puzzle of V407 Cygni by Hudec, R. (2011) - Keywords: variable stars, Mira variables, symbiotic stars, gamma-rays, gamma-ray transients. 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: gamma; mira; ray; v407
• Spectroscopy of the Stellar Wind in the Cygnus X-1 System by Miškovičová, I.; Hanke, M.; Wilms, J.; Nowak, M. A.; Pottschmidt, K.; Schulz, N. S. (2011) - 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; phase; ray; wind; x-1
• Czech Contribution to Athena by Hudec, R.; Pína, L.; Maršíková, V.; Inneman, A.; Skulinová, M.; Míka, M. (2011) - 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 and minimize errors. Keywords: athena; czech; glass; optics; ray; wafers
• S5 1803+78 Revisited by Nesci, R.; Maselli, A.; Montagni, F.; Sclavi, S. (2012) - Many BL Lacs are X-ray sources and are a substantial part of the extragalactic sources detected in γ rays. The cor- relation between γ-ray and optical flares is based on two cases only: further observations are necessary to explore this topic, but a one-zone synchrotron self Compton model seems too simple to explain the be- havior of this source. Keywords: ray; source
• Czech Contribution to LOFT by Hudec, René; Petráček, Vojtěch; Šnita, Dalimil (2013) - 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. 4. Keywords: czech; detector; loft; mission; prague; ray; sdd
• The Czech Contribution to Future Large X-Ray Astronomy Telescopes: Recent Progress by Hudec, René; Pína, Ladislav; Inneman, Adolf; Černá, Daniela; Maršíková, Veronika; Tichý, Vladimír; Míka, Martin (2013) - Keywords: X-ray astronomy, X-ray telescopes, X-ray optics. In order to achieve the very high accuracy required for future large space X-ray telescopes, the parameters of the Si wafers need to be optimized (for application in X-ray optics) at the production stage. Keywords: czech; optics; ray; telescopes; wafers
• PROPOSAL OF NEW OPTICAL ELEMENTS by Chadzitaskos, Goce; Tolar, Jiří (2013) - 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: crystal; planes; ray; strip
• THE FIRST CENTURY OF COSMIC RAYS, AN HISTORICAL OVERVIEW by Jones, Lawrence W. (2013) - 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). The accelerator–cosmic ray interaction 4 The Echo Lake and Mount Evans research program 5 Recent cosmic ray research References Keywords: chamber; cosmic; particle; physics; ray; rays; research; studies
• GALACTIC AND EXTRAGALACTIC SUPERNOVA REMNANTS AS SITES OF PARTICLE ACCELERATION by Sasaki, Manami (2013) - 4 we compare the radial number distribution of X-ray SNRs in M31 to that of Galactic SNRs and of X-ray SNRs in M33 Middle: 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 0.9m Curtis Schmidt telescope at the Cerro Tololo Inter-American Observatory (yellow) and the Digitized Sky Survey (orange and light blue), and radio data from the Very Large Array and Green Bank Telescope in red. Keywords: particles; ray; shock; snrs; supernova
• RX-J0852−4622: THE NEAREST HISTORICAL SUPERNOVA REMNANT – AGAIN by Aschenbach, Bernd (2013) - 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 f)−1/2 Keywords: density; ray; snr; vela; wind
• XMM-NEWTON SCIENTIFIC HIGHLIGHTS: X-RAY SPECTROSCOPIC POPULATION STUDIES OF AGN by Guainazzi, Matteo (2013) - Accretion disk inclination angle ı derived from X-ray relativistic spectroscopy on the FERO and GREDOS samples X-ray relativistic spectroscopy is one of the few direct ways to measure the inclination of the innermost disk region, down to a few gravitational radii from the BH event horizon. Keywords: agn; apj; disk; et al; mnras; ray; xmm
• THE SEARCH FOR BLAZARS AMONG THE UNIDENTIFIED EGRET gamma-RAY SOURCES by Meintjes, Pieter J.; Nkundabakura, Pheneas (2013) - Optical photometry (B-band and R-band) of PKS J0820−5705 and PMN J0710−3850. Optical spectroscopy of PKS J0820−5705 shows a feature- less spectrum, shallow K4000 depression with broad absorption lines at z = 0.06 resembling an FSRQ, while the spectrum of PMN J0710−3850 shows broad and narrow emission lines at z = 0.129, resembling a LINER-Seyfert I galaxy. Keywords: 3eg; j0820−5705; pks; pmn; ray; sources; spectrum
• TeV GAMMA RAYS: OBSERVATIONS VERSUS EXPECTATIONS & THEORY by Krennrich, Frank (2013) - However, an abundance of relativistic electrons, as indicated by non-thermal X-ray synchrotron ra- diation, provides an unwelcome background for the 635 http://dx.doi.org/10.14311/AP.2013.53.0635 http://ojs.cvut.cz/ojs/index.php/ap http://tevcat.uchicago.edu/ Frank Krennrich Acta Polytechnica search for γ-ray emission of hadronic origin. Starburst (SB) galaxies offer a complementary “lab- oratory” for probing the role of SNRs as cosmic-ray ac- celerators; γ-ray emission from an SB galaxy provides a calorimetric measure of the cosmic-ray density in the star-forming region and can be used to establish the connection between star formation (e.g., SNRs) and cosmic-ray origin. Keywords: ebl; emission; ray; rays; spectrum; tev
• POPULATION OF BLACK HOLES IN THE MILKY WAY AND IN THE MAGELLANIC CLOUDS by Ziółkowski, Janusz (2013) - In this review, I will briefly discuss the different types of black hole (BH) populations (supermassive, intermediate mass and stellar mass BHs) both in the Galaxy and in the Magellanic Clouds and compare them with each other. Stellar mass BHs 4.1. Keywords: apj; bhs; binaries; mass; ray
• EROSITA: AGN SCIENCE, BACKGROUND DETERMINATION, AND OPTICAL FOLLOW-UP SPECTROSCOPY by Boller, Thomas (2013) - eROSITA black hole growth studies and multi-wavelength follow-up work The study of the black hole growth over cosmic time is one of the key science issues which are of relevance for the core science of the eROSITA mission. 3. eROSITA background determination The eROSITA background has been simulated based on photon and high-energy particle spectral compo- nents. Keywords: background; erosita; galaxies; hole; ray; survey
• GRB INVESTIGATIONS BY ESA GAIA AND LOFT by Hudec, René; Šimon, Vojtech; Hudec, Lukáš (2013) - 53 supplement/2013 GRB Investigations by ESA Gaia and LOFT the algorithms developed for the plates for Gaia. An interesting feature of Gaia BP and RP instruments will be the study of highly redshifted triggers. Keywords: dispersion; gaia; grbs; loft; oas; ray
• THE ASTRO-H MISSION by Maeda, Yoshitomo; Takahashi, Tadayuki; Mitsuda, Kazuhisa; Kelley, Richard (2013) - [12] H. Tsunemi et al., “Soft X-ray imager (SXI) onboard ASTRO-H”, Proc. SPIE, 8443, submitted (2012) “Rapid X-ray flaring from the direction of the supermassive black hole at the Galactic Centre” Nature 413, 45–48 (2001) 806 Acta Polytechnica 53(Supplement):803–806, 2013 1 Introduction and current status 2 Spacecraft and instruments 3 Expected Scientific Performance Acknowledgements References Keywords: astro; kev; ray; spie
• STATISTICAL PROPERTIES OF GRB AFTERGLOW PARAMETERS AS EVIDENCE OF COSMOLOGICAL EVOLUTION OF THEIR HOST GALAXIES by Beskin, Gregory; Oganesyan, Gor; Greco, Giuseppe; Karpov, Sergey (2014) - Prompt optical events (P) are pre- sumably produced as a result of collisions of internal shells in GRB sources, while the afterglows are formed as the shock wave enters the interstellar medium. Pair correlations for different classes of GRB optical counterparts with correlation coefficients greater than 0.5 and significances better than 1%. Keywords: a(u; afterglow; burst; et al; gamma; grb; ray; redshift
• The satellite SMILE – its prospects for observing cosmic sources by Šimon, Vojtěch; Hudec, René; Read, Andrew (2025) - Meaningful compar- isons of the light curves of 1-day means of X-ray fluxes of a cosmic object from various satellites will thus be possible. Figure 2 compares the details of the light curves of Vela X-1 in various X-ray bands (2–3 keV, 8–9 keV, and 15–50 keV). Keywords: band; bat; flux; kev; light; maxi; ray; sxi
• Czech contribution to AHEAD2020: novel/alternative X-ray optics by Hudec, René; Maršíková, Veronika; Inneman, Adolf; Oberta, Peter; Pína, Ladislav (2025) - Keywords: X-ray optics, X-ray telescopes, Kirkpatrick-Baez, ray-tracing, X-ray optical tests. We briefly present selected results in the field of X-ray optics obtained within the project at the CTU in Prague in collaboration with other Czech Institutes, mainly Rigaku Prague, where X-ray optics modules were assembled. Keywords: eye; figure; lobster; modules; optics; prague; ray
• Nanosatellite X-ray lobster eye optics – measurement of optical performance by Tichý, Vladimír; Němcová, Šárka; Hudec, René; Míka, Martin (2025) - Lobster eye X-ray optics. Keywords: Lobster eye, multi-foil optics, reflective optics, grazing incidence optics, X-ray optics. Keywords: eye; figure; lobster; optics; ray
• A study of X-ray point sources in Heiles Clouds 1 and 2 by Varga, Nóra; Joó, András Péter; Koncz, Bendegúz (2025) - +25.94067833689,eq=ICRS&- c.rs=0.004 0.44 6.36 × 10−16 9.58 × 10−17 IV/38/tic -c=070.41179395162 +25.94078969880,eq=J2000&- c.rs=0.004 0.44 1.05 × 10−15 4.39 × 10−16 I/305/out GSC2.3===N9RV004914&-c=070.411814 +25.940912,eq=J2000&-c.rs=0.00 0.47 8.33 × 10−16 3.14 × 10−16 I/305/out GSC2.3===N9RV004914&-c=070.411814 +25.940912,eq=J2000&-c.rs=0.00 0.48 1.12 × 10−15 3.14 × 10−17 II/349/ps1 -c=070.411801850 +25.940684730,eq=J2000&- c.rs=0.004 0.48 1.37 × 10−15 3.14 × 10−17 J/AJ/156/241/table4 recno=2882736 0.48 6.47 × 10−16 6.22 × 10−18 IV/34/epic ID=248018164&-c=070.411763 +25.940765,eq=J2000&-c.rs=0.004 0.48 1.11 × 10−15 3.11 × 10−17 I/353/gsc242 -c=070.41180397042 × 10−14 2.40 × 10−16 VIII/112/spsc250 recno=263696 249.99 1.95 × 10−14 3.60 × 10−16 VIII/112/spsc250 recno=263696 363.00 5.78 × 10−15 8.26 × 10−16 J/ApJ/849/63/ysos recno=109 886.96 2.00 × 10−16 2.84 × 10−17 J/ApJ/771/129/table2 recno=171 1300.00 5.88 × 10−17 5.07 × 10−18 J/ApJ/872/158/table4 recno=176 1332.41 5.74 × 10−17 4.95 × 10−18 J/ApJ/771/129/table2 recno=171 129 N. Varga, A. P. Joo, B. Koncz Acta Polytechnica Table 4. Keywords: 10−15 j; = j2000&c.rs=0.004; cloud; field; gsc242; i/353; icrs&c.rs=0.004; ii/368; ray; sources; sstsl2; v/154; ysos; × 10−15

• Evaluation of Methods used for Separation of Vibrations Produced by Gear Transmissions by Dočekal, A.; Kreidl, M.; Šmíd, R. (2008) - Feature selection methods are therefore used that can find a suboptimal solution only, but their computation is less de- manding. The vibration signal generated by the gear transmission can be separated using methods that make it possible to select the valid features included in the signal. Keywords: feature; gear; methods; results; search; selection; signal; transmission; vibration; � �
• Noise Reduction in Car Speech by Bolom, V. (2009) - Under these assumptions it holds � � �� � � xs j T sx j T ss j i M i M M M X e X e� � � �� � ��2 1 11 1 , (12) � ( ) ( ) ,� � � xx Keywords: car; fig; input; interference; j t; noise; signal; speech; t �; � �
• DISTINGUISHING BETWEEN SPOT AND TORUS MODELS OF HIGH-FREQUENCY QUASIPERIODIC OSCILLATIONS by Karas, Vladimír; Bakala, Pavel; Török, Gabriel; Dovčiak, Michal; Wildner, Martin; Wzientek, Dalibor; Šrámková, Eva; Abramowicz, Marek; Goluchová, Kateřina; Mazur, Grzegorz P.; Vincent, Frédéric H. (2014) - 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: doi; figure; frequency; pds; rxte; signal; spot; torus
• USING PHOTOPLETHYSMOGRAPHY IMAGING FOR OBJECTIVE CONTACTLESS PAIN ASSESSMENT by Koeny, Marcus; Blanik, Nikolai; Yu, Xinchi; Czaplik, Michael; Walter, Marian; Rossaint, Rolf; Blazek, Vladimir; Leonhardt, Steffen (2014) - 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. HRV signals of ECG, PPG and PPGI. Keywords: ani; beat; ecg; figure; heart; pain; ppg; ppgi; rate; signal
• Reducing Ultrasonic Signal Noise by Algorithms based on Wavelet Thresholding by Kreidl, M.; Houfek, P. (2002) - 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. The coefficient of noise reduction �SN was defined for a comparison of the success of the used algorithms, according to Eq. Keywords: detail; noise; reduction; signal; � �
• Using the Correlation Function in Ultrasonic Non-destructive Testing by Kreidl, M.; Houfek, P. (2002) - � � � � � ��R rT N x � ��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: fig; noise; signal; � �
• Speech Signal Recovery in Communication Networks by Zagursky, V.; Riekstinsh, A. (2004) - This procedure was referred to in [6] as non-adaptive, as well as the prediction with � � 1. The error can be minimized by applying the adaptive ap- proach, as was demonstrated in [6], by calculating the error for interpolation with the use of (4) and by determining the minimal error depending on the coefficients a�1 and a+1, we will obtain: � �a a a r rXX XXopt � � � �� � � 1 1 11 1 2( ) ( ) , (7) where r n R n RXX XX XX( ) ( ) ( )� 0 is the correlation coefficient. Keywords: error; interpolation; order; recovery; samples; signal; � �
• VERSATILE CHIRP SINE GENERATOR ON FIXED-POINT FPGA by Kunz, Jan; Beneš, Petr (2020) - Linear chirp sine signal is used, for example, in radars. Implementation of DDS chirp signal generator on FPGA. Keywords: chirp; frequency; generation; phase; point; signal; sine; speed
• Signal-to-Noise Ratio Improvement based on the Discrete Wavelet Transform in Ultrasonic Defectoscopy by Matz, V.; Kreidl, M.; Šmíd, R. (2004) - (2) DWT coefficients are usually sampled from the CWT on a dyadic grid, choosing parameters of translation � � �n m2 and scale s m�2 , it is possible to defined mother wavelet in DWT as: � �m n m m mt t n , ( ) � �� � � � � � 1 2 2 2 . An important requirement on ultrasonic signal filtering is zero-time shift, because the position of ultrasonic echoes is essential. Keywords: echo; fault; fig; noise; signal; wavelet; � �
• Condition Indicators for Gearbox Condition Monitoring Systems by Večeř, P.; Kreidl, M.; Šmíd, R. (2005) - 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. This parameter focuses on the trend of the vibra- tion and is sensitive to vibration signal changes. Keywords: condition; czech; gearbox; monitoring; na4; parameter; peak; signal; university; value; vibration; vibration signal; � �
• Stator current signal crossing for fault diagnosis of self-excited induction generators by Belynda, Fares; Abdelli, Radia; Bouzida, Ahcene (2023) - This method for diagnosing SEIG faults uses a synthetic signal con- taining information about the timing and amplitude of three-phase current crossings. This lower sideband frequency component of (1 − 2s)fs can be used for diagnosing rotor faults. Keywords: circuit; current; fault; figure; frequency; induction; rotor; scsc; seig; self; signal; stator
• A Digital Loudspeaker: Experimental Construction by Valoušek, P. (2006) - 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; digital; fig; loudspeaker; signal
• Evaluation of Audio Compression Artifacts by Martinez, M. Herrera (2007) - Coding signals with a strongly aperiodic character, called “attack signals” or “signals with transient behaviour” lead to an artifact known as preecho. 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. Keywords: audio; coding; decomposition; signal; transient; wavelet; � �
• Signal Separation in Ultrasonic Non-Destructive Testing by Matz, V.; Kreidl, M.; Šmíd, R. (2007) - H x x i x c H mat k k k k l ( ) exp( ) exp ( � � � � � � � � � � � � � �� � � �� � 2 42 2 ) ( ),� � � H k Ktot � 1 (8) where � is the material attenuation coefficient, cl is the veloc- ity of the longitudinal waves, xk is the grain positions of k K tot�1� is the number of grains and �k is a random vector depending on the grain volume. [9] based on group delay statistics are the group delay moving standard deviation � ��k k m k M k M T m T� � � � � � � � � �� � �1 1 2 1 2 � �( ) (4) and the group delay moving entropy H f T f Tk j j j Keywords: echo; level; noise; signal; thresholding; wavelet; � �

• Development of Real Estate Market in the Czech Republic by Jilemnická, L.; Berka, V.; Hromada, E. (2008) - 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: czech; fig; flats
• Finding Hidden Treasures: Investigations in US Astronomical Plate Archives by Hudec, René; Hudec, Lukáš (2013) - 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: archives; collections; czech; number; observatory; plate
• The Impact of Active Conductors on Czech and Hungarian Lightning Protection Legislation by Mikeš, Jan; Efmertová, Marcela; Szedenik, Norbert; Kutáč, Jirí (2013) - Development of lightning rod for lightning protection standard in Europe, especially in Czech lands. 3, H-1111 Budapest, Budapest, Hungary c Union of Court Experts, expert in the field of electrical engineering and electroenergetics, specialization in lightning protection and surge phenomena, Prague, Czech Republic ∗ corresponding author: mikes.jan@fel.cvut.cz Abstract. Keywords: buildings; coll; conductors; czech; decree; lightning; lightning protection; protection; standards; technical; čsn
• Education for Production and Operations Management by Kavan, M. (2002) - 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: czech; department; management; operations; production; programme; students; work
• HEIGHT AND WIDTH PARAMETERS FOR ENSURING PASSAGE OF EXCESSIVE LOADS ON ROADS by Petrů, Jan; Křivda, Vladislav (2017) - Transporters and the escorts for over- sized cargo face this fact regularly during the prepa- ration of transport routes. Vertical clearance on the roads Transport routes are selected also with regard to the bridges. Keywords: cargo; czech; height; parameters; passage; republic; roads; transport; width
• Significance of SMEs in the Czech Economy and Supporting SMEs as an Instrument of the Regional Development by Beran, V.; Frková, J. (2003) - In spite of the lower value added per worker created by SMEs, the welfare attributes of small enrrepreneurship make SMEs importanr for local and regional development. No. 2/2003 Significance of SMEs in the Czech Economy and Supporting SMEs as an Instrument of the Regional Development V. Beran, J. Frková SMEs (Small and Medium Enterprises) are important segments of the economic landscape ofthe Cuclz Republic, since halfofeconomic production is attributable to SMEs (52.85 %). Keywords: czech; development; economy; enterprises; industry; market; production; republic; share; smes; table; value
• FOREWORD by Bodnár, Tomáš; Dvořák, Rudolf (2021) - 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. In 1964 he moved to the Department of Mathematics, Faculty of Mechanical Engineering at the Czech Technical University in Prague as an assistant professor. Keywords: czech; faculty; technical; university
• Physical and Numerical Difficulties in Computer Modelling of Pellet-Cladding Contact Problems for Burned-Up Fuel by Dostál, M.; Zymák, J.; Valach, M. (2005) - The age of high- -speed computers has brought a qualitative change into the analysis of contact problems. Where, when, how and in what detail do we have to predict and model it? 2 Mathematical description of the problem – unilateral contact Mathematical modelling of unilateral contact problems is a new area in applied mathematics. Keywords: cladding; contact; czech; fig; fuel; pellet
• Geoinformatics Study at the Czech Technical University in Prague by Mervart, L.; Čepek, A. (2005) - 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. Calculus 1 1 Calculus 2 2 Technical geodesy 1 Constructive geometry 2 OS Linux 1 Foreign language 2 Foreign language 1 Technical geodesy 2 Introduction to law 1 Keywords: czech; geodesy; geoinformatics; gps; information; program; project; software; study; technical; university
• Reconstruction of the Old Bridge of Mostar by Popovac, M. (2006) - Dismantling the remenants bridge One of the first tasks of the contractor for the actual re- construction of the bridge was to prepare the Site around the Old Bridge. About 200 pieces of pottery were found on the site – dat- ing form the 15th to 20th century, about twenty stone and one metal cannon balls, about 250 metal wedges from the structure of wooden bridge, one copper coin and several mediaeval tools. Keywords: arch; bridge; cramps; czech; fig; mostar; stone; structure; technical; university
• Moderna arhitektura u hrvatskoj 1930–IH –Modern Architecture in Croatia 1930’s by Darja Radović Mahečić by Bičík, A. (2008) - Nevertheless, these © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 43 Acta Polytechnica Vol. 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; buildings; croatian; czech; zagreb
• Valuation of Companies by Lisník, J. (2007) - Z A B C D E� � � � � � � � � �12 14 33 06 0999. . . . . [1]: � OTE (Greek), � Czech Telecom (CT) (Czech), � Swisscom (Swiss), � Telekom Austria (TA) (Austrian), � Telenor (Norwegian), � TeliaSonera (TS) (Swedish-Finnish). Keywords: companies; company; czech; czk; indicators
• Landmark emancipation of technical intelligence in pre-World War II Czechoslovakia by Holeček , Vít (2024) - Interest in incorporating technical sciences (includ- ing economics and some social disciplines) into the Česká akademie věd a umění (Czech Academy of Sci- ences and Arts) had been expressed even before the First World War. Keywords: History of Science and Technology, Masaryk Academy of Labour, IV. department of mechanical and electrical engineering, Czechoslovakia, 1918–1953, education, Albert Adalbert (Vojtěch) Velflík, cooperation with the USA, Stanislav Špaček, Czechoslovak Academy of Sciences. Keywords: academy; commission; czech; czech academy; czech technical; czechoslovakia; department; development; economic; engineering; engineers; institute; komise; labour; masaryk; masaryk academy; national; new; prague; praha; pro; research; sciences; society; technical; university
• Progress versus tradition – traditional craftsmanship and attempts at industrial tower clock production in the Czech lands in the 19th century by Knespl, David (2024) - There were also several attempts at factory mass production of tower clocks, which, however, were not developed until the 1880s by the company of Ludvík Hainz. Keywords: History of science and technology, clockmaking, tower clocks, industrial production, serial production, Josef Božek, Romuald Božek, Ludvík Hainz, Václav Krečmer, 19th century. Keywords: attempts; božek; century; clockmaker; clocks; czech; german; guild; industrial; josef; lands; prague; praha; production; school; technical; tower; tower clocks
• Czechoslovakia/Czech Republic as a leader in polymer technologies in Central Europe: from contact lenses to 3D printing by Efmertová, Marcela (2024) - Josef Průša and filaments for 3D printing The second distinguished personality active in the sphere of Czech polymers, not in the sense of their scientific research but rather their practical applica- tions, is the young Czech entrepreneur Josef Průša 10Elaborated according to a touring exhibition Otto Wichterle at the OPTA Trade Fair, 24.–26. The Research by Otto Wichterle during World War II At that time, while working on the subjects connected with his habilitation, namely during prepanation of crotonaldehydacental, he prepared rubber as a byprod- uct – the very first synthetic polymer Wichterle pro- duced. Keywords: academy; chemical; chemistry; company; contact; czech; czechoslovakia; development; institute; lenses; macromolecular; materials; otto; otto wichterle; polymers; prague; průša; republic; research; sciences; university; wichterle; work

• Classical and quantum superintegrable systems on the sphere and the hyperbolic 2-space by del Olmo, Mariano A.; Romaniega, Álvaro (2025) - For this solution, we obtain the following expression for N−,1N+,1 + µ1: −∂2 ξ − coth ξ ∂ξ − (l2 − 1)2 − 1 4 cosh2 ξ + (Mk − 1)2 sinh2 ξ . In this case N−,2N+,2 + µ2 yields: −∂2 ξ − coth ξ ∂ξ − (l2 + 1)2 − 1 4 cosh2 ξ + (Mk − 1)2 sinh2 ξ , (97) where the parameters Mk and l2 are replaced by Mk−1 and l2 + 1, respectively. Keywords: equation; hamiltonian; operators; systems
• Non Mechanical (Mezic) Type Forces in the Foundations of Quantum Mechanics by Šimáně, Č. (2010) - Then, the equations of motion can be explicitly written in the form[ μ d�v dt + μ d�u dt δV + (�v + �u) dμ dt δV+ μ (�v + �u) (δV ) dt + e m μ∇ϕδV − �uq ] mδV = 0 (8) The time derivative of δV in the fourth member of (8) must be treated as the sum of the derivatives at �v and �u constant μ(�v + �u) (δV ) dt = μ(�v + �u) [div�u(�v + �u) + div�v(�v + �u)] δV = μ�v div�vδV + μu div �uδV (9) 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 time derivatives must be taken at �v and �u constant. Keywords: equation; � u
• Bidifferential Calculus, Matrix SIT and Sine-Gordon Equations by Dimakis, A.; Kanning, N.; Müller-Hoissen, F. (2011) - 9 Solutions of the scalar (sharp line) SIT equations We rewrite p in (20), where now m = 1, as follows, p = p0 − tr ( (SK +KS)ΞKΞ (IM + (KΞ)2)−1 ) = p0 + tr ( (IM + (KΞ)2)x (IM + (KΞ)2)−1 ) = p0 + ( log det ( IM + (KΞ)2 )) Taking (11) into account, the Miura transformation reads q = −cx a−1 = −rx − r ax a−1 , qy = −r Keywords: equation; matrix; solutions
• Rational Approximation to the Solutions of Two-Point Boundary Value Problems by Amore, P.; Fernández, F. M. (2011) - Keywords: nonlinear differential equations, Ginzburg-Landau, Wilson’s renormalization, Wegner-Houghton, Riccati equation, Padé-Hankel method. Table 4 shows Hankel sequences with d = 0 and d Keywords: equation; −0.461
• Emmy Noether and Linear Evolution Equations by Leach, P. G. L. (2013) - These each have an equivalent in the Schrödinger Equation corresponding to the Lagrangian and by extension to linear evolution equations in general. The Black-Scholes-Merton Equation is but one of a number of evolution equations to be found in Financial 1One would hope that this initial condition would not apply in financial matters! Keywords: equation; evolution; noether; symmetries; symmetry
• DIRAC AND HAMILTON by Leach, P. G. L. (2014) - 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: dirac; equation; hamiltonian; mechanics
• ON PARTIAL DIFFERENTIAL AND DIFFERENCE EQUATIONS WITH SYMMETRIES DEPENDING ON ARBITRARY FUNCTIONS by Gubbiotti, Giorgio; Levi, Decio; Scimiterna, Christian (2016) - Startsev, Darboux integrable discrete equations possessing an autonomous first-order integral, J. Phys. [5], i.e., equations integrable by the Spectral transform, which have an infinite dimensional group of point symmetries. Keywords: darboux; equation; functions; math; order; point; symmetries; symmetry
• ON THE CONSTRUCTION OF PARTIAL DIFFERENCE SCHEMES II: DISCRETE VARIABLES AND SCHWARZIAN LATTICES by Levi, Decio; Rodriguez, Miguel A. (2016) - − hym(un+1,m − un,m)− σyn(un,m+1 − un,m) hxnh y m − σxmσ y n ) − σyn (hym+1(un+1,m+1 − un,m+1)− σyn(un,m+2 − un,m+1) hxnh y m+1 − σxm+1σ y n − hym(un+1,m − un,m)− σyn(un,m+1 − un,m) hxnh y m − σxmσ y n )]( hxnh y m − σxmσyn )−1 − (hym(un+1,m − un,m)− σyn(un,m+1 − un,m))2 (hxnh y m − σxmσ y n)2 = 0. (27) 240 vol. Let us construct using the formulas introduced in the previous section the discrete scheme which preserves the point symmetries of the potential Burgers equation uy − uxx − u2 x = 0. (19) Keywords: difference; equation; hyn; invariant; lattice
• Propagation of Quasi-plane Nonlinear Waves in Tubes by Koníček, P.; Bednařík, M.; Červenka, M. (2002) - The solution of the linearized GBE for the boundary con- dition � � � �v vz zm0, sin� ��� can be expressed as � �� � � �v v z zz zm� � � �exp sin� � �� �b b . (32) where � is the attenuation coefficient for the classical thermo- -viscous loss mechanism � � � � b c 2 0 0 32 (33) and the attenuation coefficient �b represents the losses due to the wall friction � �b � �B . The cut-off frequency of the first symmetric mode in a cir- cular waveguide is given by the formula f c k c Rm1 � � �0 1 0 02 2� � � � , (36) where k1 is the radial wave number of the first mode and � ��� � .38317 is the first zero point of the Bessel function derivative: � �� � �J0 0�� . Keywords: equation; frequency; kzk; t �; velocity; z �; � b; � r; � v; � �
• FURTHER GENERALISATIONS OF THE KUMMER-SCHWARZ EQUATION: ALGEBRAIC AND SINGULARITY PROPERTIES by Sinuvasan, R; Krishnakumar, K; Tamizhmani, K M; Leach, PGL (2017) - We examine the sequence of equations introduced above in terms of singularity analysis. We reported the symmetries, singularity properties and solutions for the members of the family. Keywords: equation
• CRYPTO-HERMITIAN APPROACH TO THE KLEIN–GORDON EQUATION by Semoradova, Iveta (2017) - Free Klein–Gordon equation In case of free Klein–Gordon equation operator K = −∆ +m2 (16) acting on H = L2(R3) is positive and Hermitian. doi:10.1007/s10582-006-0395-9. 466 http://dx.doi.org/10.1142/S0217751X06028813 http://dx.doi.org/10.1088/0305-4470/37/40/016 http://dx.doi.org/10.1007/s10582-005-0127-6 http://dx.doi.org/10.1023/B:CJOP.0000044017.33267.58 http://dx.doi.org/10.1103/RevModPhys.30.24 http://dx.doi.org/10.1103/PhysRev.102.568 http://dx.doi.org/10.1142/S0219887810004816 http://dx.doi.org/10.1088/0034-4885/70/6/R03 http://dx.doi.org/10.1016/j.aop.2011.12.009 http://dx.doi.org/10.1007/s10582-006-0395-9 Acta Polytechnica 57(6):462–466, 2017 1 Introduction 2 Klein-Gordon equation in Schrödinger form 2.1 Eigenvalues 2.2 Free Klein–Gordon equation 3 Crypto-Hermitian approach 3.1 Computation of the metric 3.2 The discrete case 4 Conclusions Acknowledgements References Keywords: equation; gordon; hermitian; klein; operator; phys; quantum
• QUASI-EXACTLY SOLVABLE SCHRÖDINGER EQUATIONS, SYMMETRIC POLYNOMIALS AND FUNCTIONAL BETHE ANSATZ METHOD by Quesne, Christiane (2018) - = − q−1∑ t=0 [2(n− 1)ak−t + bk−t−1]m(q−t,0̇) − [q/2]∑ s=1 q−2s∑ t=0 2ak−tm(q−t−s,s,0̇) − n(n− 1) k(k − 1) q(2k − q − 1)ak−q − n k − n(n− 1) k(k − 1) q(2k − q − 1)ak−q − n k Keywords: equation; polynomials; terms
• SIMILARITY SOLUTIONS AND CONSERVATION LAWS FOR THE BEAM EQUATIONS: A COMPLETE STUDY by Halder, Amlan Kanti; Paliathanasis, Andronikos; Leach, Peter Gavin Lawrence (2020) - 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: beam; bernoulli; conservation; equation; euler; form; lie; point; solutions; symmetries
• PROPERTIES OF A DIFFERENTIAL SEQUENCE BASED UPON THE KUMMER-SCHWARZ EQUATION by Maharaj, Adhir; Andriopoulos, Kostis; Leach, Peter (2020) - 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: equation; sequence
• MODIFIED EQUATION FOR A CLASS OF EXPLICIT AND IMPLICIT SCHEMES SOLVING ONE-DIMENSIONAL ADVECTION PROBLEM by Bodnár, Tomáš; Fraunié, Philippe; Kozel, Karel (2021) - 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; equation; numerical; schemes; solution
• ON THE THREE-DIMENSIONAL PAULI EQUATION IN NONCOMMUTATIVE PHASE-SPACE by Haouam, Ilyas (2021) - 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: continuity; current; equation; field; function; noncommutative; pauli; pauli equation; phase; quantum; space
• On generalized Heun equation with some mathematical properties by Saad, Nasser (2022) - − s(α3(s − 1) + β2) + ε1 (α1(s + 1) + β0)(s + 2) = P2;s(ε0) − k ((k − 1)α1 + β0) × ((k − 1)(k − 2)α3 + (k − 1)β2 + ε1)Pk−1(ε0), (75) initiated with P−1(ε0) Keywords: differential; equation; k +; polynomial; β1 r; − √
• Quantization of rationally deformed Morse potentials by Wronskian transforms of Romanovski-Bessel polynomials by Natanson, Gregory (2022) - [y; a; ε | − ...m1] = 0 (103) solved under the DBCs lim y→0 ∞ ̸Ψ [y; a; εn(a) | − ...m1] = 0 (104) has exactly N(a) eigenfunctions ∞ ̸Ψ Keywords: bessel; equation; morse; polynomials; potentials; solutions; | −
• Linearisation of a second-order nonlinear ordinary differential equation by Maharaj, Adhir; Leach, Peter G. L.; Govender, Megan; Day, David P. (2023) - 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: differential; equation
• Derivation of entropy production in a fluid flow in a general curvilinear coordinate system by Flídr, Erik (2023) - 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: entropy; equation; fluid; production; tensor
• Construction of angular-dependent potentials from trigonometric Pöschl-Teller systems within the Dunkl formalism by Schulze-Halberg, Axel (2023) - − 2 [ν1 tan(ϕ) − ν2 cot(ϕ)] Φ′(ϕ) + [ m2 − ν1(1 − r1) cos(ϕ)2 − ν2(1 − r2) A = λ + α + (1 + 2ν1 + 2ν2 + 2ν3)2 4 , (33) B = 1 4 − m2 − (ν1 + ν2)2 + β 4 , (34) C = (r3 − ν3)ν3 − γ . Keywords: darboux; equation; potential; transformation
• An innovative iterative approach to solving Volterra integral equations of second kind by Hussein, Mohammed Abdulshareef; Jassim, Hassan Kamil; Jassim, Ali Kareem (2024) - Volterra integral equations of the second kind are a set of integral equations with the general form: u(x) Keywords: Volterra integral equations, new iterative method, Taylor series, Hussein Jassim method. Keywords: equation; x=0
• Persistence of solvability in quantum systems deformed by Dunkl operators by Schulze-Halberg, Axel (2025) - − V1 − 4. (63) Eν,n = −4 n2 − 8 n − 2 n f2 − V1 − 4 − 2 f2 = −4 n2 − 8 n − (2 n + 2) √ 1 + 4 V1 + 4 ν (ν − δ) Keywords: dunkl; equation; m(x

• Statistical Analysis of Input Parameters Impact on the Modelling of Underground Structures by Hilar, M.; Pruška, J. (2008) - A multi- criteria analysis resulted in the selection of pre-excavation 6 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 48 No. 5/2008 Number of calculation a b In �1 In � 2 In � 3 In � 4 In � 5 Value qij’ �1 1 �0.64 �0.26 0.00 0.26 0.64 Ground 1 25 27 25.4 25.6 26.0 26.4 26.6 Ground 2 27 29 27.4 27.6 28.0 28.4 28.6 Ground 3 22 25 22.5 22.9 23.5 24.1 24.5 Ground 4 25 30 25.9 26.5 27.5 28.6 29.1 Ground 5 30 35 30.9 31.5 32.5 33.6 34.1 Ground 6 35 38 35.5 35.9 36.5 37.1 37.5 Ground 7 35 38 35.5 35.9 36.5 37.1 37.5 Ground 8 25 28 25.5 25.9 26.5 27.1 27.5 Table 1: Input � values for various geotechnical layers based on random intervals Calculation q E1 � q2 � � q3 � � q c4 � q5 � � 1 4 2 2 5 3 2 1 3 5 2 1 3 3 5 3 4 5 4 5 1 4 3 4 5 2 4 1 1 2 Table 2: Random permutations of the input parameters qi Parameter qij Edef This classification was established in 1974 in Norway (by Barton, Lien, Lunde and Loset) and is based on six parameters [4]: Q RQD J J J J SRFn r a w � � � , (1) where RQD � rock quality designation, Jn � joint set num- ber, Ja � joint alteration number, Jw � joint water reduction number, SRF � stress reduction factor. Keywords: input; mass; number; parameters; rock; tunnel; � �
• Instability Growth Rate Dependence on Input Parameters During the Beam–Target Plasma Interaction by Horký, Miroslav (2013) - −Ω2 1ω 2 c1 − Ω1ω 2 c1k(G3) + ( ω2 c1k 2 c2 s1 + ω2 c1ω 2 p1 ) (G2)2 ] · [ Ω 4 2 + iΩ2 2ωc2ku2(G1)−Ω2 2 ( c2 s2k 2 + 1 ) −Ω2 2ω 2 c2 − Ω2ω 2 c2ku2(G3) + ( ω2 c2k 2 c2 s2 + ω2 c2 ) (G2)2 ] − [ ω2 p1 ( Ω 2 1 − ω2 c1(G2)2 )] · [ Ω 2 2 − ω2 c2(G2)2 ] = 0, (5) where we denoted G1 = (cos θB sinϕ sin θk), G2 = (cosϕ sin θk sin θB + cos θk cos θB), G3 = (cos2 θB cosϕ sin θk − cos θB cos θk sin θB), Ω1 = ω − k cosϕ sin θk, Ω2 = ω − ku2 cosϕ sin θk. [ iF (0) α · eB mα + ( c2 sαk 2 + ω2 pα ) k · eB k2 ]} − 2∏ α=1 ω2 pα k2 [ Ω2 αk 2 − ω2 cα (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. Keywords: dependence; parameters; results
• Modeling Measurement Uncertainty in Room Acoustics by Dietrich, P. (2007) - 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: acoustics; fig; measurement; parameters; room; uncertainty; � �
• Improved Evaluation of Planar Calibration Standards Using the TDR Preselection Method by Vancl, J. (2007) - [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: calibration; error; fig; measurement; parameters; standards

• Effect of Gas Mixture Composition on the Parameters of an Internal Combustion Engine by Chríbik, Andrej; Polóni, Marián; Lach, Ján (2012) - 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: combustion; engine; gas; hydrogen; mixture
• Experimental Investigation of Radial Gas Dispersion Coefficients in a Fluidized Bed by Štefanica, Jiří; Hrdlička, Jan (2012) - 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: bed; dispersion; gas; tracer
• Concepts of Emission Reduction in Fluidized Bed Combustion of Biomass by Purgar, Amon; Winter, Franz (2012) - 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: bed; combustors; flue; gas; plants
• OPTIMALIZATION OF AFTERBURNER CHANNEL IN BIOMASS BOILER USING CFD ANALYSIS by Pospíšil, Jiří; Lisý, Martin; Špiláček, Michal (2016) - 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: combustion; concentration; duct; flue gas; gas; section; trace gas
• Application of Discrete Element Methods to the Problem of Rock Bumps by Procházka, P. P.; Kugblenu, M. G. (2002) - 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. AP02_04.vp 1 Introduction The arguments for using discrete element methods in- stead of methods defined on the continuum of the entire domain were discussed in a previous paper by the authors, [9]. Keywords: bumps; coal; fig; gas; kpa; pn �; rock; � �
• Fiber Optic Detection of Ammonia Gas by Kalvoda, L.; Aubrecht, J.; Klepáček, R. (2006) - 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�. Creation of metallic complexes of the dyes resulted in bathochromic shifts (��) of the absorption bands due to widening of the corresponding electronic resonant systems. Keywords: absorption; ammonia; fibre; gas; ppm; reagent; sensing; vol; � �

• Modularity of Pressing Tools for Screw Press Producing Solid Biofuels by Matúš, Miloš; Križan, Peter (2012) - The whole workload is transmitted in the axis of the ma- chine through the outer flange system (tensile stress) 71 Acta Polytechnica Vol. 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: chamber; figure; material; pressing; screw
• IMPACT OF STRAIN RATE ON MICROALLOYED STEEL SHEET BREAKING by Mihaliková, Mária; Német, Miroslav; Vojtko, Marek (2014) - Keywords: strain rate, microalloyed steel, fracture surface. [5] Német, M., Mihaliková M.: The effect of strain rate on the mechanical properties of automotive steel sheets, Acta Polytechnica, 53 (4), 2013, p. 384–387. Keywords: loading; material; rate; steel; strain
• EFFECTS OF INITIAL MOISTURE CONTENT ON THE PRODUCTION AND QUALITY PROPERTIES OF SOLID BIOFUEL by Matúš, Miloš; Križan, Peter; Beniak, Juraj; Šooš, Ľubomír (2015) - It also shows the percentage of the change in moisture content of the briquettes after five days with initial moisture content of spruce sawdust calculated on the basis of the initial moisture. The final moisture content of the pellets or bri- quettes from biomass is greatly dependent on process conditions such as initial moisture content, tempera- ture, and pressure. Keywords: biomass; briquettes; content; days; density; material; moisture; moisture content; quality
• SURFACE CONSOLIDATION OF WALL PAINTINGS USING LIME NANO-SUSPENSIONS by Vojtěchovský, Jan (2017) - Test tubes 13, 16 and 17 contain lime suspensions diluted to 5 g/l, test tubes 28–33 contain lime suspensions mixed with silicic acid esters. both lime suspensions diluted with various alcohols to a concentration of 5 and 10 g of Ca(OH)2 per 1 litre of agent and subsequent applications of silicic acid esters (alkoxysilanes) and lime suspensions as well as on their mixtures. Keywords: application; consolidants; consolidation; layer; lime; material; mixtures; paint; results; suspensions; test
• THE USE OF DEM SIMULATION FOR CONFIRMING THE PROCESS OF PARTICULATE MATERIAL MIXING by Peciar, Peter; Macho, Oliver; Fekete, Roman; Peciar, Marián (2018) - 387 http://dx.doi.org/10.12913/22998624/85663 http://dx.doi.org/10.1016/0032-5910(69)80067-7 http://dx.doi.org/10.1016/0032-5910(69)80104-X http://dx.doi.org/10.1016/0032-5910(67)80036-6 http://dx.doi.org/10.1016/S0032-5910(97)03281-6 http://dx.doi.org/10.1016/j.powtec.2011.04.004 http://dx.doi.org/10.1016/j.ces.2012.05.010 http://dx.doi.org/10.1016/j.powtec.2012.04.042 http://dx.doi.org/10.1016/j.powtec.2008.04.089 Acta Polytechnica 58(6):378–387, 2018 1 Introduction 2 Energy aspect of the mixing process 3 Experimental part 4 Simulation of DEM method process 5 Results 5.1 Influence of blade speed on horizontal force 5.2 Influence on depth of blade immersion on horizontal force 5.3 Comparison of resulting horizontal force acting on a blade 6 Conclusion List of symbols Acknowledgements References Acta Polytechnica doi:10.14311/AP.2018.58.0378 Acta Polytechnica 58(6):378–387, 2018 © Czech Technical University in Prague, 2018 available online at http://ojs.cvut.cz/ojs/index.php/ap THE USE OF DEM SIMULATION FOR CONFIRMING THE PROCESS OF PARTICULATE MATERIAL MIXING Peter Peciar∗, Oliver Macho, Roman Fekete, Marián Peciar Slovak University of Technology in Bratislava, Faculty of Mechanical Engineering, Institute of Process Engineering, Námestie Slobody 17, 812 31, Bratislava, Slovakia ∗ corresponding author: peter.peciar@stuba.sk Abstract. Keywords: blade; blade immersion; blade speed; dimensionless; force; horizontal; material; mixing; particulate; particulate material
• ANALYSIS OF THE PROPERTIES OF AW2099 ALUMINIUM-LITHIUM ALLOY WELDED BY LASER BEAM WITH AW5087 ALUMINIUM-MAGNESIUM FILLER MATERIAL by Sahul, Miroslav; Sahul, Martin; Pašák, Matej; Marônek, Milan (2019) - EN AW2099 belongs to the 3rd generation of aluminium lithium alloys. Keywords: Aluminium lithium alloy, laser beam welding, equiaxed zone, microstructure, electron microscopy, mechanical properties. Keywords: alloy; aluminium; doi:10.1016; filler; laser; lithium; material; weld; welding; zone
• Design development and study of an elastic sectional screw operating tool by Hevko, Roman; Zalutskyi, Sergii; Tkachenko, Ihor; Lyashuk, Oleg; Trokhaniak, Oleksandra (2021) - 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. (a). Keywords: conveyor; elastic; figure; grain; material; operating; screw; tool; transportation
• Finite Element Modelling of Cold Formed Stainless Steel Columns by Macdonald, M.; Rhodes, J. (2005) - � � � � � � � � � � E K E n , (1) where � � unit strain � � unit stress (N/mm2) E � modulus of elasticity (N/mm2) K and n are constants for a given curve, which are evaluated through two secant yield strength values for slopes of 0.7 E and 0.85 E. Equation (1) was modified by Hill 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. Keywords: columns; material; section; steel; strain; stress; � �

• Probabilistic Analysis of the Hard Rock Disintegration Process by Frydrýšek, K. (2008) - 5 Results – stochastic evaluation Figs. 9 to 14 show the equivalent stress (i.e. �HMH distribu- tions) at some selected time t of the solution calculated for one of 500 Monte Carlo simulations (i.e. for one situation when the material of the ore is described by values Rp �12 MPa, Rm �13 5. MPa, E � 20000 MPa and � � 0 2. ). Figure 16 is calculated for one simulation (i.e. for the situation when the material of the ore is described by values Rp �12 MPa, Rm �13 5. Keywords: bit; disintegration; fem; fig; ore; results; sbra
• SIZE ANALYSIS OF SOLID PARTICLES AT THE EXPERIMENTAL DEVICE FOR MULTI-STAGE BIOMASS COMBUSTION by Hrnčířová, Michaela; Špiláček, Michal; Pospíšil, Jiří (2014) - 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: device; figure; laser; particles; results; size
• APPLICABILITY VERIFICATION OF AUTOFORM SOFTWARE FOR FEM SIMULATION OF MECHANICAL FIXATION OF HEMMED JOINTS by Chrášťanský, Lukáš; Šanovec, Jan; Martawirya, Yatna Yuwana; Valeš, Michal (2019) - Keywords: Hemming, FEM simulation, AutoForm, car-body, automotive industry, the law of similarity. This software is commonly used for FEM simulations during preparation stages for car-body parts produc- tion. Keywords: autoform; figure; fixation; law; results; simulation; software
• Automated Classification of Analysis- and Reference Cells for Cancer Diagnostics in Microscopic Images of Epithelial Cells from the Oral Mucosa by Schneider, T. E. (2007) - 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 95.5 Table 3 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: cells; classification; dna; feature; knn; results; set

• Automatic Compensation of Workpiece Positioning Tolerances for Precise Laser by Stache, N. C.; Nguyen, T. P. (2008) - 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. This can be reformulated as Q B Bi i T T i i( ) minv v v� � �� , (6) where the eigenvector vopt of BTB, which belongs to the smallest eigenvalue �4, equals the sought parameter vector u. Thus, the circle parameters c and r can be determined. Keywords: circle; contour; estimation; fig; image; laser; position; welding; � �
• Welding of Aluminum Using a Pulsed Nd:YAG Laser by Nerádová, M.; Kovačócy, P. (2010) - 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 the measured dimensions influences of voltage energy, pulse duration and standoff distance on the weld ge- ometry were evaluated. Keywords: welding parameters, laser welding, aluminum, weldability of aluminum. Keywords: aluminum; fig; laser; penetration; welding
• Laser Cutting of Materials of Various Thicknesses by Grepl, Martin; Pagáč, Marek; Petrů, Jana (2012) - 4f with a cutting speed of 750 mm ·min−1. Table 4: Laser cutting velocities with 60 % power Number of cut Laser cutting velocities [mm ·min−1] Cut 4a 500 Cut 4b 600 Cut 4c 700 Cut 4d 800 Cut 4e 900 Cut 4f 750 Figure 4: The cuts of variable cutting velocity with constant power 60 % Figure 5: The sample — sheet metal 3.2 mm in thickness (Haynes 718): a) upper side of the sample, b) underside of the sample 64 Acta Polytechnica Vol. 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. We also in- vestigated the influence of cutting parameters on the resulting cutting structure from the point of view of shape deformations of the cutting gap and the cre- ation of a recast layer, which is an undesirable ac- companying effect of laser cutting. Keywords: cut; cutting; laser; speed
• MOONLIGHT: A NEW LUNAR LASER RANGING RETROREFLECTOR AND THE LUNAR GEODETIC PRECESSION by 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. (2013) - [11] T. W. Murphy et al, Publications of The Astronomical Society of the Pacific, 121:29–40, 2009; The Apache Point Observatory Lunar Laser-ranging Operation (APOLLO): Two Years of Millimeter- Precision Measurements of the Earth-Moon Range [12] I. I. Shapiro, R. D. Reasenberg, J. F. Chandler, R. W. Babcock, PRL 61, 2643 (1988); Measurement of the de Sitter Precession of the Moon: a Relativistic Three-Body Effect [13] J. G. Williams, S. G. Turyshev, and D. H. Boggs, PRL 93, 261101 (2004) [14] Williams, J. G., Newhall, X. X., Dickey, J. O. Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 53, Issue 12, 15 June 1996, pp.6730–6739 06/1996; Relativity parameters determined from lunar laser ranging [15] Williams, James G., Newhall, X. X., Dickey, Jean O., Planetary and Space Science, v. 44, p. 1077–1080. 10/1996; Lunar moments, tides, orientation, and coordinate frames [16] Williams, J. G., Turyshev, S. G., Boggs, D. H., Ratcliff, J. T., Adv. Space Res. 37(1), 67–71, 2006; Lunar laser ranging science: gravitational physics and lunar interior and geodesy 749 http://iln.arc.nasa.gov/ Acta Polytechnica 53(Supplement):746–749, 2013 1 Introduction 1.1 The Satellite/lunar laser ranging Characterization Facility (SCF) 1.2 The MoonLIGHT – ILN experiment 2 Analysis of lunar laser ranging data 3 Conclusions Acknowledgements References Keywords: apollo; arrays; laser; llr; lunar; ranging; scf
• MOONLIGHT: A NEW LUNAR LASER RANGING RETROREFLECTOR INSTRUMENT by 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. (2013) - 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: apollo; ccr; laser; llr; lunar; new; ranging
• INFRARED PHOTOLUMINESCENCE SPECTRA OF PBS NANOPARTICLES PREPARED BY LANGMUIR–BLODGETT AND LASER ABLATION METHODS by Remes, Zdeněk; Novak, Tomas; Stuchlik, Jiri; Stuchlikova, The-ha; Dřínek, Vladislav; Fajgar, Radek; Zhuravlev, Konstantin (2014) - The infrared photoluminescence spectra of PbS nanoparticles prepared by the Langmuir-Blodgett technique show higher photoluminescence intensity and a shift to shorter wavelengths than the infrared photolumines- cence spectra of PbS nanoparticles prepared by laser ablation from a PbS target. We also have proved that PbS nanoparticles prepared in the form of thin layers have high stability. Keywords: ablation; infrared; laser; nanoparticles; pbs; photoluminescence; spectra
• AN EXPERIMENTAL INVESTIGATION INTO MOISTURE-INDUCED EXPANSION OF PLASTERS by Sovják, Radoslav (2015) - The coefficient of moisture expansion for individual plasters is presented in Fig. An approximation and smoothing of the mea- sured moisture-induced strains for individual plasters (Fig. 7) was described, as follows, as a function of moisture content: ε(w) = a w + w0 − a w0 , (1) where ε is the moisture-induced strain, w is the mois- ture content by volume and a and w0 are fitting con- stants. Keywords: expansion; laser; moisture; plaster; samples; study; year
• TRANSITION METAL OXIDES AS MATERIALS FOR ADDITIVE LASER MARKING ON STAINLESS STEEL by Mihalev, Mihail Stoyanov (2017) - Morphology of a “dot” sample — molybdenum trioxide The most typical pattern is presented in Figure 3, it was obtained at CO2 laser irradiation times between 10 and 100ms, being relevant to the technology pro- cesses of laser marking. The developed model is in concordance with the convec- tive model [24], describing the characteristic surface rippling of laser re-melted surfaces. Keywords: beam; co2; coating; dot; figure; laser; marking; materials; moo3; oxides; raman; sample; wo3
• REDUCTION OF UNCERTAINTIES IN LASER STRIPE MEASUREMENT OF SOLID PARTICLES CONCENTRATION by Krupička, Jan; Picek, Tomáš; Zrostlík, Štěpán (2018) - Keywords: laser stripe measurement; coarse particle concentration; solid fraction measurement; fluidization cell; brightness threshold. Relation between threshold brightness Bth and concentration c evaluated from LSM measurement. Keywords: brightness; bth; concentration; figure; laser; measurement; position; wall
• ADDITIVE LASER BARCODE PRINTING ON HIGH REFLECTIVE STAINLESS STEEL by Mihalev, Mihail Stoyanov; Hardalov, Chavdar Momchilov; Christov, Christo Georgiev; Rinke, Monika; Leiste, Harald; Schneider, Johannes (2020) - Spectral Reflectance Profile of stainless steel substrate and MoO3 layer, obtained by the ALM. 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. Keywords: bar; barcode; contrast; laser; reflectance; steel
• LASER ULTRASONIC MEASUREMENT OF MECHANICAL DECAY IN LIMESTONE CAUSED BY FREEZE-THAW CYCLES by Kravcov, Alexander; Franek, Ondřej; Morozov, Nikolaj; Kucewicz, Michał; Tomaszewski, Michał; Svoboda, Pavel; Baranowski, Paweł (2020) - This paper describes a study of local physical and mechanical characteristics after freeze-thaw cycles of limestone samples by laser ultrasonic spectroscopy, which is able to define local elastic modules of materi- als. 410 https://doi.org/10.14311/AP.2020.60.0410 https://ojs.cvut.cz/ojs/index.php/ap vol. Poisson’s ratio map of limestone sample. Keywords: cycles; laser; limestone; porosity; pulse; samples
• Conversion of units of length from the Czech state standard to the geodetic baseline Javoriv by Lechner, Jiří; Kosarev, Nikolai Sergeevich; Trevoho, Igor Sergeevich (2022) - In this regard, there is an obvious need for constant modernisation of reference complexes to ensure the uniformity of length measurement as well as for constant international metrological comparisons. Operational experience of GNSS receivers with Chip Scale Atomic Clocks for baseline measurements. Keywords: baseline; baseline javoriv; geodetic; javoriv; laser; leica; length; measurement; total; uncertainty

• Creating Panoramic Images for Bladder Fluorescence Endoscopy by Behrens, A. (2008) - The optimal threshold �t is then determined by � �b t T bt t2 0 2( ) max ( )� � � � (1) with � � � � �b t t t t t2 1 2 1 2 2( ) ( ) ( ) ( ( ) ( ))� � (2) and the two class probabilities �1, �2 and their mean levels �1, �2. 5, by � � � �m x y L x y L x y L x y L x y( , ) ( , ) ( , ) ( , ) ( , )� � � � � � � �1 1 1 1 2 2 (7) �( , ) arctan ( , ) ( , ) ( , ) ( , ) x y L x y L x y L x y L x y � � � � � � � � � � 1 1 1 1� � � ��. Keywords: algorithm; bladder; feature; fig; image; video; � �
• Analysis of Feature Point Distributions for Fast Image Mosaicking Algorithms by Behrens, A.; Röllinger, H. (2010) - 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. For this application, a fixed num- ber of feature points is required for real-time process- ing [14]. Keywords: distribution; feature; image; number; points; registration; set; tree
• Projective 3D-reconstruction of Uncalibrated Endoscopic Images by Faltin, P.; Behrens, A. (2010) - The concept is that the projection lines through the camera centers �C and �C ′ and the image points �x and �x ′ intersect in the 3D point �X , as shown in fig. The 3D-point �X is pro- jected onto the image planes, resulting in points �x and �x ′. The points �e and �e ′ are called epipoles, and they represent the projected camera centers on the image planes. Keywords: camera; correspondences; fig; geometry; image; reconstruction; view
• Subjective Evaluation of Audiovisual Signals by Fikejz, F. (2010) - Younger people mostly give preference to music like sample no. 1, and they do not have much experi- ence with classical music and Gregorian chant. Keywords: subjective test, audiovisual signal quality, compression, JPEG, MP3. Keywords: combination; image; quality; samples; sound; subjects; test
• A Morphing Technique Applied to Lung Motions in Radiotherapy: Preliminary Results by Laurent, R.; Henriet, J.; Gschwind, R.; Makovicka, L. (2010) - [44] Wolthaus, J. W., Schneider, C., Sonke, J. J., Van Herk, M., Belderbos, J. S. A., Rossi, M. M. G., Lebesque, J. V., Damen, E. M. F.: Mid- ventilation CT scan construction from four- dimensional respiration-correlated CT scans for radiotherapy planning of lung cancer patients. Int. [45] Wolthaus, J. W., Sonke, J. J., Van Herk, M., Damen, E. M.: Reconstruction of a time- averaged midposition CT scan for radiother- apy planning of lung cancer patients using de- formable registration. Keywords: 4dct; image; lung; medical; morphing; motion; organ; patient; phase; voxels
• Application of Wavelet Transform for Image Denoising of Spatially and Time Variable Astronomical Imaging Systems by Blažek, M.; Anisimova, E.; Páta, P. (2011) - For the third decomposition level, the influence of the denoising on the astronomical image was even nega- tive for several wavelets (e.g. most of the Daubechies and Reversed Biorthogonal wavelets) because of the strong artifacts of the transform (Figure 4). 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. 51 Keywords: image; noise; psf; transform; wavelet
• Stellar Object Detection Using the Wavelet Transform by Anisimova, E.; Páta, P.; Blažek, M. (2011) - Keywords: stellar object detection, wavelet transform. • Subtracting S1 of S0, we get wavelet coefficients for the first decomposition level corresponding to the smallest details W1 = S0 − S1. Keywords: catalog; image; transform; wavelet
• Multi-functional star tracker — future perspectives by Roháč, J.; Řeřábek, M.; Hudec, R. (2011) - Various attitude reference sources can be 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). They provide very precise information about the attitude in space according to consecutive evaluation of star positions. Keywords: attitude; fov; image; star; systems; wfst
• Utilization of Image Intensifiers in Astronomy by Vítek, S.; Fliegel, K.; Páta, P.; Koten, P. (2012) - In this paper we present the properties of image intensifiers, used together with fast TV cameras for astronomical purposes within the MAIA project(Meteor Keywords: image intensifier, astronomy, meteors. Keywords: image; intensifier; lens
• The Point Spread Function Variations inside Wide-field Astonomical Images by Anisimova, Elena; Bednář, Jan; Páta, Petr (2013) - Moffat function shape depending on FWHM and atmospheric scattering coefficient β. Figure 2 shows examples of Moffat function shapes. Keywords: function; image; imaging; moffat; psf
• An Algorithm for Investigating the Structure of Material Surfaces by Toman, M.; Procházka, P. (2003) - pre-processing of the input images, o search for grain boundaries, o calculation of probability distribution of grain size. The localization of grain boundaries may be applied to an investigation of any materials with a surface stnrcture similar to a grain structure. Keywords: algorithm; boundaries; grain; grain boundaries; grain size; image; input; input image; intensity; peaks; points; size
• Wavelet-Based Embedded Rate Scalable Still Image Coders: A review by Elnagahy, Farag Ibrahim Younis; Šimák, B. (2004) - [26] Adams M. D.: Reversible wavelet transforms and their appli- cation to embedded image compression. Keywords: JPEG2000, embedded image coding, grayscale, color, scalable, progressive, compression, discrete wavelet transform. Keywords: algorithm; bit; coding; coefficients; compression; fig; image; pass; rate; stream; sub; transform; wavelet; � �
• 3D DIGITAL RECONSTRUCTION BASED ON ARCHIVED TERRESTRIAL PHOTOGRAPHS FROM METRIC CAMERAS by Poloprutský, Zdeněk; Fraštia, Marek; Marčiš, Marián (2019) - − − − − − − Version 6 | Version 7 | Version 10 | Version 12 c1 = 98.91 c2 = 98.99 c1 = 98.91 c2 = 98.99 c1 = 98.91 c2 = 98.99 c1 = 98.91 c2 = 98.99 98.90 99.03 98.99 99.14 98.80 99.04 98.78 98.99 0.46 0.40 -0.32 -0.46 0.16 0.07 0.08 0.00 0.10 -0.14 -0.12 -0.14 0.10 -0.13 0.12 0.00 -3.42e−4 2.52e−3 -2.35e−3 3.87e−3 − − − − − − P2 − − − -5.80e−4 Keywords: calibration; camera; cloud; fig; image; metric; photogrammetry; photographs; point; processing; reference; software; − −
• OPTIMIZATION OF COMPUTATIONAL BURDEN OF THE POINT INFORMATION GAIN by Urban, Jan; Rychtáriková, Renata; Macháček, Petr; Štys, Dalibor; Urbanová, Pavla; Císař, Petr (2019) - A promising way for automation of the whole pro- cess of the selection of a sub-image of proper parame- ters is a usage of an equation of information entropy, which was defined by Shannon and generalized by Rényi − ej H +W − 1 ln nj(x) + nj(y) Keywords: entropy; histogram; image; information; intensity; j=0; pixel; w −
• Digital model of automated unmanned aerial vehicle with edge computing application for railway reconnaissance by Tulembayeva, Aigul; Ashirov, Shayakhmet; Makarov, Evgenij; Seitbattalov, Zhexen (2024) - Specifications of reconnaissance drones. The general specification of reconnaissance drones is presented in Table 1. Keywords: algorithm; computing; detection; edge; figure; image; object; railway; recognition; reconnaissance; train; uav
• Loss of particle ratio metric for particle image velocimetry accuracy estimation by Novotný, Jan; Nováková, Ludmila; Machovská, Ilona; Kašpárek, Miloš (2025) - 4/2025 Loss of particle ratio metric for particle image velocimetry accuracy . . . 4/2025 Loss of particle ratio metric for particle image velocimetry accuracy . . . Keywords: correlation; error; image; measurement; metric; particle; total; value
• Photogrammetric image processing and comparison of experimental result with laser diffraction and the PDA method by Huněk, Adam; Bartoš, Ondřej (2025) - The principle of image analysis methods for aerosol size measurement 2.1 OTSU segmentation 3 Optical methods 3.1 The Phase-Doppler anemometer 3.2 Laser diffraction 3.3 The photogrammetric method (shadowgraph) 4 Calibrating the photogrammetric method 5 The result of comparing the optical methods using monodisperse particle samples 6 The example of polydisperse distribution measurement 7 Conclusion List of symbols Acknowledgements References Optical methods have been established as a standard tool for aerosol size measurement. Keywords: background; evaluation; figure; image; measurement; methods; object; pda; sample; segmentation; size
• Stick Based Speckle Reduction for Real-Time Processing of OCT Images on an FPGA by Luecken, H.; Tech, G.; Schwann, R.; Kappen, G. (2007) - For a stick length of N NL � �( )1 2 , using the minimum number of required cy- cles N NS � �4 4 for the serial implementation yields: N f l w f � �clk img4 1. [4], both filters have been implemented in C�� and Matlab and adjusted to OCT-image data. Keywords: algorithm; fig; image; implementation; oct; processing; speckle; � �

• Single-Phase Pulse Width Modulated Rectifier by Bauer, J. (2008) - Conclusion The use of PWM control in rectifiers eliminates the prob- lems caused by using phase controlled rectifiers. PWM rectifiers can be divided into two groups according to power circuit connection – the current and the voltage type. Keywords: current; fig; pwm; rectifier; supply; voltage; � �
• Capillary Discharge XUV Radiation Source by Nevrkla, M. (2009) - The electric strength E field picture in the region of E � �( . . ) These states appear in plasma with a electron temperature of Te ~ 100 eV. Such hot plasma with sufficient electron density Ne > 1017 cm�3 is created by radial compression of a plasma column by the Lorentz force FL of a magnetic field B of flowing current I – a Z-pinch. Keywords: capillary; charging; coil; current; discharge; fig; voltage; � �
• Practical Results of a Five-level Flying Capacitor Inverter by Sivkov, O. (2010) - 4 shows the simulation results from Simulink with output voltage Uout, output current Iout, and capacitor voltages Uc1, Uc2, Uc3. 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. Keywords: capacitor; current; fig; level; output; voltage
• Diffuse Coplanar Surface Barrier Discharge in Nitrogen: Microdischarges Statistical Behavior by Cech, Jan; Hanusova, Jana; Stahel, Pavel; Slavicek, Pavel (2013) - 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. In past decades the importance of barrier discharges as the sources of non-equilibrium plasmas for material processing has raised [3]. Keywords: current; discharge; half; input; period; voltage
• Pin Hole Discharge Creation in Na2SO4 Water Solutions by Hlavatá, Lucie; Serbanescu, Rodica; Hlochová, Lenka; Kozáková, Zdenka; Krčma, František (2013) - Oscilloscope Tektronix TDS 1012B operating up to 100MHz 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: pin hole discharge, discharge in liquids, discharge breakdown. Keywords: barrier; current; discharge; hole; pin; voltage
• UPDATED VERSION OF THE SIMPLIFIED MODEL OF INTENSIVELY BLASTED ELECTRIC ARC by Senk, Josef; Laznickova, Ilona; Jakubova, Ivana (2018) - Keywords: electric arc, arc heater, argon, modeling. Predictions of arc temperature profiles using approximate emission coefficients for radiation 269 http://dx.doi.org/10.14311/AP.2016.56.0395 http://dx.doi.org/10.1109/EPE.2016.7521749 J. Senk, I. Laznickova, I. Jakubova Acta Polytechnica ‐15 ‐10 ‐5 0 5 10 15 20 25 2.30 2.50 2.70 2.90 3.10 3.30 3.50 3.70 3.90  Keywords: anode; arc; cathode; channel; current; ∆tot
• The System for Control and Stabilization of the Beam Position in the Microtron MT-25 in Prague by Šimáně, Č.; Vognar, M.; Chvátil, D. (2004) - 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: beam; current; electron; position; probe; wire; wire probe
• A Novel Approach to Power Circuit Breaker Design for Replacement of SF6 by Telfer, D. J.; Spencer, J. W.; Jones, G. R.; Humphries, J. E. (2004) - 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: arc; current; extinction; fig; gases; half; sf6
• Simulation and Analysis of Magnetisation Characteristics of Interior Permanent Magnet Motors by Walker, J. A.; Cossar, C.; Miller, T. J. E. (2005) - Keywords: permanent magnet, finite element method, flux-linkage measurement, rotor bridges. Test motor 2 has been modelled with the original rotor design (rotor bridges are the same material as the rotor bars), with the bridges at half the © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 29 Czech Technical University in Prague Acta Polytechnica Vol. 45 No. Keywords: axis; bridges; current; flux; linkage; rotor; test
• Analysis of output voltage ripple for dual randomized PWM buck converter operating in continuous and discontinuous conduction modes by Boudouda, Aimad; Boudjerda, Nasserdine; Nafa, Fares (2022) - The RPPM and RCFM schemes give the lowest voltage ripple in DCM and CCM, respectively, which further decreases as the duty cycle “d” increases. RPPM scheme. Keywords: ccm; current; dcm; output; psd; rcfm; rppm; scheme; voltage
• Measurement of Solar Cell Parameters with Dark Forward I-V Characteristics by Salinger, J. (2006) - I A J e V R I kT A J e V R I DF S S � �� � �� � � � � � � � � 01 1 02 exp exp � �2 1 kT V R I R � � �� � � � � � � � � � S P , (1) where A stands for the area of the sample, J01 is diffusion current density, J02 is generation-recombination current den- sity, �1 and �2 are the diode factors, RS is the series resistance, RP is the shunt resistance, e is the electric charge, and k is the Bolzmann constant. The values of the shunt resistance at the highest tem- peratures were always lower than at room temperature (RT), but some differences were found: 26 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 46 No. 4/2006 P Fig: 1: Temperature dependence of shunt resistance RP of sam- ples #1942-02 (�), #20 (�) and LE2 (�) Fig. Keywords: cell; charge; current; levels; � �

• Observing Galaxy Clusters with eROSITA: Simulations by Hölzl, J.; Wilms, J.; Kreykenbohm, I.; Schmid, Ch.; Grossberger, Ch.; Wille, M.; Eikmann, W.; Brand, T. (2011) - A main 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. For the simulation of the eROSITA survey we present a Monte-Carlo code generating a mock catalogue of galaxy clusters distributed according to the mass function of [1]. Keywords: clusters; function; galaxy; mass; redshift; simulation
• Teaching Management at Technical Universities, Business Reality in the Academic Environment by Baroch, V.; Duchoň, B.; Faifrová, V.; Říha, Z. (2012) - 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: business; graduates; management; simulation; skills; students; teaching
• FINITE ELEMENT MODELLING AND SIMULATION OF VEHICLE IMPACT ON STEEL SAFETY BARRIERS by Likhonina, Raissa (2016) - 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: barriers; crash; impact; jsam-2; jsnh4; safety; simulation; tests; vehicle
• SUITABLE PRODUCTION TOOLS SELECTION WITH THE USE OF EVOLUTIONARY ALGORITHMS by Hynek, Petr; Kreibich, Viktor; Firt, Roman (2020) - 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: figure; guns; production; selection; simulation; solution; welding

• Comparison of cavitation erosion of NiCrBSi and AISI 316L coatings deposited by powder plasma transferred Arc welding by Henzler, Weronika; Szala, Mirosław; Pałka, Tomasz; Wyględacz, Bernard; Czupryński, Artur; Łatka, Leszek (2025) - Effect of manganese ion implantation on cavitation erosion resistance of HIPed Stellite 6. Licensed under a CC-BY 4.0 licence Published by the Czech Technical University in Prague COMPARISON OF CAVITATION EROSION OF NICRBSI AND AISI 316L COATINGS DEPOSITED BY POWDER PLASMA TRANSFERRED ARC WELDING Weronika Henzlera, Mirosław Szalaa,∗, Tomasz Pałkab, Bernard Wyględaczc, Artur Czupryńskic, Leszek Łatkad a Lublin University of Technology, Faculty of Mechanical Engineering, Department of Materials Engineering, Nadbystrzycka 36D, 20-618 Lublin, Poland b Lublin University of Technology, Faculty of Mechanical Engineering, Department of Production Engineering, Nadbystrzycka 36D, 20-618 Lublin, Poland c Silesian University of Technology, Faculty of Mechanical Engineering, Department of Welding Engineering, Keywords: 316l; cavitation; coatings; erosion; hardness; materials; microstructure; nicrbsi; resistance; steel; welding
• CYCLIC STRESS ANALYSIS OF POLYESTER, ARAMID, POLYETHYLENE AND LIQUID CRYSTAL POLYMER YARNS by Vannucchi de Camargo, Felipe; Marcos Guilherme, Carlos Eduardo; Fragassa, Cristiano; Pavlovic, Ana (2016) - 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 (250mm/min) and 100% for other materials (500mm/min) Keywords: fatigue; figure; loading; materials; mooring; resistance; tests; yarns; ybl
• WEAR BEHAVIOUR OF VANES FOR A ROTARY VANE EXPANDER WITH VARIOUS GRAPHITE MATERIALS UNDER DRY SLIDING CONDITIONS by Vodička, Václav; Novotný, Václav; Mascuch, Jakub (2018) - Since scroll and screw expanders are too complex and expensive [1], vane expanders can be used due to their simplicity and low manufacturing costs. Therefore, vane expanders are also used in our experimental de- velopment of micro-ORC systems [2]. Keywords: carbon; coefficient; expander; fibre; friction; graphite; materials; vane; wear
• THE INFLUENCE OF FRICTION STIR WELDED PROCESS PARAMETERS OF AA2519-T62 ON JOINT QUALITY DEFINED BY NON-DESTRUCTIVE LASER AMPLIFIED ULTRASONIC METHOD AND BY MICROSTRUCTURE ANALYSIS by Kravcov, Alexander; Kosturek, Robert; Śnieżek, Lucjan; Kluczyński, Janusz; Franek, Ondřej; Morozov, Nikolaj; Maciejewski, Pawel (2020) - The influence of friction stir welded process parameters. . . The influence of friction stir welded process parameters. . . Keywords: friction; joint; materials; microstructure; samples; stir; tool; welding; zone
• Cavitation wear of Eurofer 97, Cr18Ni10Ti and 42HNM alloys by Rostova, Hanna; Voyevodin, Victor; Vasilenko, Ruslan; Kolodiy, Igor; Kovalenko, Vladimir; Marinin, Vladimir; Zuyok, Valeriy; Kuprin, Alexander (2021) - Keywords: Cavitation erosion, wear, steel, hardness, structure, resistance. 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: 42hnm; alloy; cavitation; cr18ni10ti; erosion; eurofer; materials; resistance; samples; steel; wear

• Properties of Starch Based Foams Made by Thermal Pressure Forming by Štancl, J.; Skočilas, J.; Šesták, J.; Žitný, R. (2008) - 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. i c 2 2 � � � �� � �L L( ) tanh( ) ( ) tanh( ) tanh ( � �i c i cy y y� � �� �) tanh( ) 2 , (7b) Keywords: conductivity; crust; h �; heating; porosity; properties; starch; suspension; thickness; � m; � �
• Thermal Entanglement and Critical Behavior of Magnetic Properties on a Triangulated Kagomé Lattice by Ananikian, N.; Ananikyan, L.; Chakhmakhchyan, L.; Kocharian, A. (2011) - Sa ki presents the Heisenberg spins and Sb ki the Ising spins The Hamiltonian can be written as follows: H = Jaa ∑ (i,j) Sa i S a j − Jab ∑ (k,l) (Sz)ak · (Sz)bl − H 2N 3∑ i=1 3[(Sz)aj + 1 2 (Sz)bj ], (1) where Sa = {Sa x, Sa y , Sa z } is the Heisenberg spin- 1 2 op- erator, and Sb is the Ising spin. Keywords: entanglement; field; heisenberg; ising; properties; quantum
• MECHANICAL PROPERTIES OF PVA NANOFIBER TEXTILES WITH INCORPORATED NANODIAMONDS, COPPER AND SILVER IONS by Indrová, Kateřina; Prošek, Zdeněk; Topič, Jaroslav; Ryparová, Pavla; Nežerka, Václav; Tesárek, Pavel (2015) - Keywords: PVA nanofiber textiles; nanodiamonds; ions; mechanical properties; tensile strength. Our study investigates PVA nanofiber textiles based on an aqueous solution for their specific properties and with a view to low cost production. Keywords: ions; nanofiber; ndp; properties; pva; solution; textiles; vol
• MICROSTRUCTURE DESCRIPTION AND MICROMECHANICAL PROPERTIES OF SPRUCE WOOD by Prošek, Zdeněk; Králík, Vlastimil; Topič, Jaroslav; Nežerka, Václav; Indrová, Kateřina; Tesárek, Pavel (2015) - 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: cell; earlywood; figure; indentation; latewood; modulus; nanoindentation; properties; stiffness; vol; wall; wood
• FEATURES OF STRUCTURE FORMATION AND CHANGES IN THE MECHANICAL PROPERTIES OF CAST Al-Mg-Si-Mn ALLOY WITH THE ADDITION OF (Ti+Zr) by Trudonoshyn, Oleksandr; Puchnin, Maxim; Mykhalenkov, Kostiantyn (2015) - The popularity and the successful implementation into foundry practice of Al-Mg-Si-Mn alloys is based on its advantages in comparison with Al-Si-Mg alloys, such as: • these alloys have one of the highest eutectic melting points (597 °C) among all commercial Al casting alloys; eutectic alloys are the most suitable alloys for casting. As has been pointed out in [1, 2], there is a call for new alloys suitable for these processes; • improved degassing and refining techniques for alu- minium alloys; • developing new alloys. Keywords: alloys; casting; eutectic; fig; mg2si; properties; treatment
• DETERMINING THE ROLE OF INDIVIDUAL FLY ASH PARTICLES IN INFLUENCING THE VARIATION IN THE OVERALL PHYSICAL, MORPHOLOGICAL, AND CHEMICAL PROPERTIES OF FLY ASH by Haider, Usman; Bittnar, Zdenek; Kopecky, Lubomír; Šmilauer, Vít; Pokorny, Jaroslav; Zaleska, Martina; Prošek, Zdenek; Hrbek, Vladimír (2016) - The chemical composition of fly ashes is usually measured with the help of XRF analyses which give the average values of chemical composition and es- timate that coal fly ash typically contains a high percentage of elements such as Si, Al, Ca, and Fe in it and relatively low percentages of heavy metals such as Cu, Zn, Pb, Hg with some rare earth ele- ments Phase-chemical and chemical composition of coal fly ashes as a basis for their multicomponent utilization. Keywords: analyses; chemical; coal; dětmarovice; edx; elements; fig; fly; fly ashes; images; ledvice; mělník; particles; percentages; počerady; present; properties
• Geotechnical and microstructural properties of cement-treated laterites stabilized with rice husk ash and bamboo leaf ash by Nnochiri, Emeka Segun; Ogundipe, Olumide Moses; Ola, Samuel Akinlabi (2021) - Materials The materials used were: rice husk ash, bamboo leaf ash, soil sample, ordinary Portland cement and water. Chemical composition of soil sample, BLA, RHA and cement. Keywords: a-7; ash; bla; cbr; cement; figure; properties; rha; sample; soil; soil sample
• MICROSTRUCTURAL CHARACTERISTICS, MECHANICAL AND WEAR BEHAVIOUR OF ALUMINIUM-ALLOYED DUCTILE IRONS SUBJECTED TO TWO AUSTEMPERING PROCESSES by Adebayo, Abdullahi Olawale; Oyetunji, Akinlabi; Alaneme, Kenneth Kenayo (2020) - Austempered ductile iron (ADI): Influence of austempering temperature on microstructure, mechanical and wear properties and energy consumption. Ductile irons containing 1−4wt.% Al were produced and subjected to single and two-step austempering processes. Keywords: aluminium; ausferrite; austempering; cast; ductile; ductile irons; graphite; properties; step; wear; wt.%

• Gated Graphene Electrical Transport Characterization by Náhlík, Josef; Janoušek, Michal; Šobáň, Zbyněk (2012) - 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: gate; graphene; hysteresis; silicon; substrate; voltage
• DLC Films Deposited by the DC PACVD Method by Palamarchuk, D.; Zoriy, M.; Gurovič, J.; Černý, F.; Konvičková, S.; Hüttel, I. (2003) - A problem that affects some of these methods is their poor adhesion to steel substrates with no intermediate layer' One fotential solution to this problem is to use current plasma for hepositing DLC films with no intermediate layer' This paper ,,.idi, the adhesion of DLC films to steel substrates and the microhardness of the laYer. l: Schematic view of DC PACVD aPParatus Table 1: Deposition Parameters of DLC films Then we investigated the dependence of microhardness o.r biu, voltage anithe adhesion of the DLC layers to the steel substrate. Keywords: adhesion; bias; dlc; films; voltage
• Measurement of Light Intensity Based on a Flip-flop Sensor by Kollár, M. (2003) - Keywords: measurement, tlip-flop sensor, light intensity, equiualent aoltage. 3 Proposed solution and experimental results Fig.4 shows a system for measuring light intensity. Keywords: flip; flop; light; sensor; voltage
• Fuzzy Algorithm for Supervisory Voltage/Frequency Control of a Self Excited Induction Generator by Soliman, Hussein F.; Attia, Abdel-Fattah; Mokhymar, S. M.; Badr, M. A. L. (2006) - qr qs dr ds� � � �( ) ( ) 16: Dynamic response of duty cycle for PI with and without FLC Fig. 17: Suddenly variation for the wind speed versus time Appendix SEIG differential equations at no load vds Stator Voltage (volt) Differential Equation at Direct Axis v R i ps b b ds ds qs ds� � � � �� � �� � � �� � �� � � � � � , (1) vqs Stator Voltage Differential Equation at Quadrate Axis v R i ps b b qs qs ds qs � � � � �� � �� � � � � � � � � � � � � , Keywords: controller; fig; flc; frequency; value; voltage; wind; � �

• Acceleration of Sparse Matrix-Vector Multiplication by Region Traversal by Šimeček, I. (2008) - The CSR format can be inef- ficient due to many thrashing misses for some types of matrices: � matrices with a large number of nonzero elements per row (relative to the cache size), � matrices with large bandwidth (relative to the cache size). I I( )� � . Keywords: cache; csr; fig; format; matrices; matrix; misses; performance; region; spm×v
• Memory Hierarchy Behavior Study during the Execution of Recursive Linear Algebra Library by Šimeček, I. (2008) - 4 Evaluation of the results 4.1 Testing configuration 4.1.1 HW configuration All results were measured on Pentium Celeron M420 at 1.6 GHz, 2GB@ 333 MHz, with the following cache parameters: L1 cache is a data cache with BS � 64, CS � 32 kB, s � 8, h � 64, and LRU replacement strategy. [7]. � For TLB miss ratio measuring, we also used the CA with the following parameters: h �1, s �128, BS � 4096. Keywords: cache; fig; gemm; matrix; � �
• gl3 ALGEBRA IN MIXED MATRIX REPRESENTATIONS by Turbiner, Alexander V. (2025) - In the partic- ular case of the gl3 algebra, these generators take the form: E11 = x1∂1 + M11, E22 = x2∂2 + M22, E12 = x1∂2 + M12, E21 = x2∂1 + M21, E0 = k − x1∂1 − x2∂2, T − 1 = ∂1, T − 2 = ∂2, T + 1 = x1(k − x1∂1 − x2∂2) [7], for discussion see [8]: a = ∂ ∂z̄ , a† = − ∂ ∂z + z̄. (6) Keywords: algebra; gl3; matrix; operators; representation
• On Representations of sl(n, C) Compatible with a Z2-grading by Havlíček, M.; Pelantová, E.; Tolar, J. (2010) - ap-5-10.dvi Acta Polytechnica Vol. 50 No. 5/2010 On Representations of sl(n, C) Compatible with a Z2-grading M. Havlíček, E. Pelantová, J. Tolar Abstract This paper extends existing Lie algebra representation theory related to Lie algebra gradings. [16], including the notion of compatibly graded representation, it is really surprising that there does not yet exist a theory of representations of graded Lie algebras compatible with a given grading. Keywords: algebra; automorphism; grading; k−1; lie; matrix; representation
• COULOMB SCATTERING IN NON-COMMUTATIVE QUANTUM MECHANICS by Gáliková, Veronika; Prešnajder, Peter (2013) - In [9] we gave an exact simple formula for the NC negative bound state energies, and in [10] we presented the full solution of the NC Coulomb problem. 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: coulomb; matrix; non
• gln+1 ALGEBRA OF MATRIX DIFFERENTIAL OPERATORS AND MATRIX QUASI-EXACTLY-SOLVABLE PROBLEMS by Smirnov, Yuri F.; Turbiner, Alexander (2013) - +M22, E12 = x1∂2 +M12, E21 = x2∂1 +M21, E0 = k − x1∂1 − x2∂2, T− 1 = ∂1, T− 2 = ∂2, T+ 1 = x1(k − x1∂1 − x2∂2)− x1M11 − x2M12, T+ 2 = x2(k − x1∂1 − x2∂2)− x1M21 − x2M22. We also can call it a scalar representation, since the generators E11 = x1∂1, E22 = x2∂2, E12 = x1∂2, E21 = x2∂1, E0 = k − x1∂1 − x2∂2, T− 1 = ∂1, T− 2 = ∂2, T+ 1 = x1(k − x1∂1 − x2∂2), T+ 2 = x2(k − x1∂1 − x2∂2), (12) act on one-component spinors or, in other words, on scalar functions (see e.g. [5]). Keywords: algebra; differential; generators; matrix; operators; representation
• ON THE REAL MATRIX REPRESENTATION OF PT-SYMMETRIC OPERATORS by Fernández, Francisco M. (2014) - There- fore 〈ϕ2n|p̂2|ϕ2m〉 = 〈φ2n|p̂2|φ2m〉 〈ϕ2n|p̂2|ϕ2m+1〉 = 〈φ2n|p̂2|φ2m+1〉 = 0 〈ϕ2m+1|p̂2|ϕ2n〉 = 〈φ2m+1|p̂2|φ2n〉 = 0 〈ϕ2n+1|p̂2|ϕ2m+1〉 = 〈φ2n+1|p̂2|φ2m+1〉 (23) and 〈ϕ2n|V |ϕ2m〉 = 〈φ2n|Keywords: antiunitary; basis; matrix; operator; set
• ON IMMERSION FORMULAS FOR SOLITON SURFACES by Grundland, Alfred Michel; Levi, Decio; Martina, Luigi (2016) - The problem of constructing integrable surfaces associated with the CPN−1 models and their deformations under various types of dynam- ics have generated a great deal of interest over the past decades [35] providing a formula for the immersion of integrable surfaces which are extensively used in the literature (see e.g. 190 vol. Keywords: formula; function; gauge; immersion; lsp; matrix; soliton; surfaces; symmetries; symmetry; zcc
• AUTOMATIC WINDING GENERATION USING MATRIX REPRESENTATION - ANFRACTUS TOOL 1.0 by Ouamara, Daoud; Dubas, Frédéric; Benallal, Mohamed Nadjib; Randi, Sid Ali; Espanet, Christophe (2018) - In order to achieve the desired performances for a given ap- plication, several types of windings are developed and studied, viz. [4–10]: full-pitch winding, short- pitch (or chorded) winding, long-pitch winding, con- centrated around teeth winding, distributed winding, wave winding, winding with one-two speeds, winding with dead coils, basket windings, skein winding, flat loop non-overlapped winding, flat loop overlapped winding (chain winding), skew winding, diamond winding, involute coil winding [4], toroidal winding Keywords: coils; doi:10.1109; figure; ieee; layers; machines; matrix; number; slots; winding
• ON SELF-SIMILARITIES OF CUT-AND-PROJECT SETS by Masáková, Zuzana; Mazáč, Jan (2017) - Using this, and the expression for ω4 in terms of lower powers of ω, namely ω4 = −1− ω − ω2 − ω3, we get from the remaining rows the following relations between the integer coefficients a, . . . ω2 − ω4 ω3 − ω4 1− ω2 ω3 − ω2 ω − ω2 ω4 − ω2 1− ω3 ω2 − ω3 ω4 − ω3 ω − ω3  . Keywords: cos; cut; matrix; project; self; sin
• PARALLELIZATION OF ASSEMBLY OPERATION IN FINITE ELEMENT METHOD by Bošanský, Michal; Patzák, Bořek (2020) - 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; element; matrix; memory; number; omp; pth; synchronization; threads; vector
• The Influence of Disorder in Multifilament Yarns on the Bond Performance in Textile Reinforced Concrete by Konrad, M.; Chudoba, R. (2004) - The improvement of the local bond performance is counterpro- ductive and results in an earlier failure of the outer filaments with higher bond performance. 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. Keywords: bond; fig; filaments; matrix; maximum; pull; yarn
• A Progress Report on Numerical Solutions of Least Squares Adjustment in GNU Project Gama by Čepek, A.; Pytel, J. (2005) - [Modified Gram–Schmidt (MGS) column version] for k � 1 2, , ,� n for i k� �1 2 1, , ,� r q a a a r qik k T k i k i k i ik i: ; : ;( ) ( ) ( )� � ��1 end � : ; : ( � � ) ;( )q a r q qk k k kk k T k� � 1 2 q q rk k kk: � ;� end Algorithms 1.3 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×n matrix with orthogonal columns, W is a diagonal matrix n×n with nonnegative elements and V is a square orthogonal matrix n×n, (this variant is referred to as the thin SVD [3]). Keywords: adjustment; columns; equations; gama; matrix; orthogonalization; project; � �
• Photonic graphene under strain with position-dependent gain and loss by Castillo-Celeita, Miguel; Contreras-Astorga, Alonso; Fernández C., David J. (2022) - We work with photonic graphene lattices under strain with gain and loss, modeled by the Dirac equation with an imaginary mass term. Keywords: Graphene, Dirac materials, photonic graphene, matrix supersymmetric, quantum mechan- ics. Keywords: dirac; gain; graphene; hamiltonian; loss; matrix; photonic; strain
• A Mindlin shell finite element for stone masonry bridges with backfill by Řeřicha, Petr (2022) - Element internal forces {S} and nodal forces {X} st = (0.5 − ξ 6)ξεt, sb = εtξ 2/6 ∂st ∂εt = (0.5− ξ 6)ξ−(0.5− ξ 3)ξ2 εb εt , ∂st ∂εb = (0.5−ξ/3)ξ2 ∂sb ∂εt = ( 1 − 2ξ εb εt ) TM shell element The DOFs at the bottom vertices of the elements connecting to a node do not lie in the same plane and are not independent of the DOFs at the top vertices. Keywords: arch; bridges; element; figure; forces; masonry; matrix; node; normal; plane; shear; shell
• Performance Aspects of Sparse Matrix-Vector Multiplication by Šimeček, I. (2006) - 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. This makes the serial code longer, so that the instructions can be better scheduled, the internal pipeline can be better utilized, and the number of condition tests drops from n to � �n Uf . Keywords: csr; format; loop; matrix; performance
• Qualitative sign stability of linear time invariant descriptor systems by Chand, Madhusmita; Paitandi, Mamoni; Gupta, Mahendra Kumar (2023) - Matrix pairs which are stable, independent of their magnitudes with only sign information are denoted as Qualitative Sign Stable (QLSS) matrix pairs and 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: links; matrix; number; pair; qualitative; sign; stability
• Verification of mechanical properties of forged moulding compound composite for small structural parts of microsatellites by Uher, Ondřej; Kruml, Josef; Král, Michal (2025) - Calculated tensile modules for different lengths of reinforcement fibres. For detailed results of test samples see Tables 6 and 7. Keywords: matrix; mould; reinforcement; samples; test

• THE DISCOVERY OF THE CHANDRASEKHAR MASS AND THE CHANDRASEKHAR-EDDINGTON CONTROVERSY by Shaviv, Giora (2013) - In the paper Eddington set out to look for flaws in the derivation of the result P ∼ ρ4/3 for relativistic electrons. Until 1935, Eddington’s attacks on Chandrasekhar were made in public and not in published papers. Keywords: chandrasekhar; eddington; electrons; mass; paper; star; stoner; theory
• CP VIOLATIONS (AND MORE) AFTER THE FIRST TWO YEARS OF LHCB by Auriemma, Giulio (2013) - The ATLAS and CMS data are at present not inconsistent with a SM Higgs mass in the range 115 ≤ mh ≤ 126 GeV/c2 (see note 1) which is fa- vored by EW precision measurements J.-P. Francoise et al. eds. Keywords: cpv; decay; higgs; lhcb; mass; universe
• THERMAL AND CHEMICAL EVOLUTIONS OF GALAXY CLUSTERS OBSERVED WITH SUZAKU by Sato, Kosuke; Matsushita, Kyoko; Ishisaki, Yoshitaka; Yamasaki, Noriko Y.; Ohashi, Takaya (2013) - 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; clusters; icm; mass; sne
• STATUS OF THE CUORE EXPERIMENT by Tomei, Claudia (2013) - Some contributions to CUORE background are shown in Tab. 1, based on the pessimistic hypoth- esis that all the contributions observed in the R&D tests come from sources that will not improve with the geometry of CUORE. CUORE bolometers [10, 11] are tellurium dioxide crystals. Keywords: background; cryostat; crystals; cuore; cuore-0; detector; experiment; mass; neutrino
• Mass growth of massive quiescent galaxies in the Illustris TNG simulation by Koncz, Bendegúz; Joó, András Péter (2025) - Previous studies examined, how galaxy mergers can quench the star formation in galaxies. The number of galaxy mergers was relatively low as well before z > 2. Keywords: formation; galaxies; galaxy; mass; mergers; notices; star
• Review: the landscape of gravitational wave astronomy by Poggiani, Rosa (2025) - [22] A. J. Levan, J. D. Lyman, N. R. Tanvir, et al. [Erratum: Astronomy & Astrophysics 652:C4, 2021]. https://doi.org/10.1051/0004-6361/201833910 [53] A. G. Riess, W. Yuan, L. M. Macri, et al. Keywords: abbott; binary; et al; gravitational; gw170817; journal; letters; mass; merger; neutron; review; star; wave

• Calculation of the Electromagnetic Field Around a Microtubule by Havelka, D.; Cifra, M. (2009) - The size of the dipole moment was defined by the function: pp p n� � �sin( )2� , (17) where n is the value of the matrix element corresponding to a certain heterodimer, and for p see Table 2. 3.3 Depiction of the direction and magnitude of the electric field The size of the electric field (EF) was drawn by function surf, see e.g. Fig. 6. [nm] 2 �4.92 3 �1.84 4 �6.76 5 �3.68 6 �0.6 7 2.48 8 �2.44 9 0.64 10 �4.28 11 �1.2 12 �6.12 13 �3.04 Table 1: Longitudinal shift of PT in the A-lattice Dipole moment: p � �10 26 Cm (1000 Debye) Keywords: dipole; electric; emf; field; fig; phase; vol; � �
• Exceptional Points and Dynamical Phase Transitions by Rotter, I. (2010) - The nar- row resonance states appear due to resonance trap- ping, i.e. as a consequence of the alignment of 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: environment; phase; quantum; resonance; states
• Path Integrals for (Complex) Classical and Quantum Mechanics by Rivers, R. J. (2011) - 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. We now consider complex phase space, repeating the analysis of Smilga [18], taking the complex extension of the real phase-space as x → Z = x + iy, p Keywords: complex; mechanics; phase; phys; quantum; space
• Monitoring PSR B1509–58 with RXTE: Spectral analysis 1996–2010 by Litzinger, E.; Pottschmidt, K.; Wilms, J.; Suchy, S.; Rothschild, R. E.; Kreykenbohm, I. (2011) - Spectral analysis 1996–2010 E. Litzinger, K. Pottschmidt, J. Wilms, S. Suchy, R. E. Rothschild, I. Kreykenbohm Abstract We present an analysis of the X-ray spectra of the young, Crab-like pulsar PSR B1509–58 (pulse period P ∼ 151ms) observed by RXTE over 14 years since the beginning of the mission in 1996. Keywords: pulsars: individual (PSR B1509–58) — stars: neutron — X-rays: stars. Keywords: epoch; kev; phase; pulse; spectra
• Analysis of Phase Evaluation Algorithms in an Interferometric Method for Static Deformation Measurement by Novák, J. (2002) - The resulting error of phase values �� is then given by � �� � � �� � �� � � , (14) where are the calculated phase values and �� are the original phase values. The difference in computing time between © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 39 Acta Polytechnica Vol. 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: algorithms; b b; b �; measurement; phase; values �; � tan; � �
• New Phase Shifting Algorithms Insensitive to Linear Phase Shift Errors by Novák, J. (2002) - From these phase calculation algorithms it is evident that firstly the phase values � ��� � �W � , must be determined and then the discontinuities in the phase data can be proper- ly unwrapped using suitable phase unwrapping procedures Then according to the sign of the expressions we can de- termine the wrapped phase values � ��� � �W � , . Keywords: algorithms; phase; shift; values �; � tan; � �
• NUMERICAL CALCULATION OF THE COMPLEX BERRY PHASE IN NON-HERMITIAN SYSTEMS by Wagner, Marcel; Dangel, Felix; Cartarius, Holger; Main, Jörg; Wunner, Günter (2017) - 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: berry; complex; hermitian; parameter; phase; phys; space; states
• H2 PERMEATION BEHAVIOR OF Cr2AlC AND Ti2AlC MAX PHASE COATED ZIRCALOY-4 BY NEUTRON RADIOGRAPHY by Tang, Chongchong; Grosse, Mirco Karl; Trtik, Pavel; Steinbrück, Martin; Stüber, Michael; Seifert, Hans Jürgen (2018) - Keywords: MAX phase coating; Zircaloy; ATF; hydrogen permeation; neutron radiography. Neutron radiography images of the reference uncoated Zircaloy-4 specimens (a) before hydrogen loading and (b) after hydrogen permeation at 700 °C for 1 h (hydrogen dark). Keywords: coatings; cr2alc; figure; hydrogen; max; neutron; permeation; phase; radiography; ti2alc
• GENERAL CALCULATION OF WINDING FACTOR FOR MULTI-PHASE/-LAYER ELECTRICAL MACHINES IRRESPECTIVE OF POLES NUMBER by Ouamara, Daoud; Dubas, Frédéric; Randi, Sid Ali; Benallal, Mohamed Nadjib; Espanet, Christophe (2019) - In order to represent multi-layer windings, [1] has subdivised the number of columns of [Mw] by the number of layers. By introducing this new concept, multi-layer windings having false-zero will be subdivided into two categories: i) α-windings (i.e., odd false-zero windings), and ii) β-windings (i.e., even false-zero windings). Keywords: factor; figure; layer; number; phase; winding
• A new structural reconfiguration for multilevel inverters with fault tolerance capability by Lakhdari, Meftah; Rabhi, Boualaga; Benaissa, Amar (2024) - Fault detection at three-level NPC inverters A diagnosing method for switch failures will be de- velop based on the analysis of electrical quantities with voltage characteristics. Three-phase 3-level NPC inverter with 12 voltage sensors for fault detection. Keywords: case; circuit; fault; figure; inverter; leg; phase; tolerance
• Speaker Non-speech Event Recognition with Standard Speech Datasets by Rajnoha, J. (2007) - 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: database; events; non; phase; recogniser; recognition; speaker; speech; training

• Quantum graphs featuring unusual self-adjoint extensions by Exner, Pavel (2025) - By Krein’s formula [9] the resolvents of Ĥ and HD differ by an operator of rank not exceeding N (in fact, equal to N − 1), hence their essential spectra coincide and we get σess(Ĥ) = ∅. Furthermore, both Ĥ and HD are self-adjoint exten- sions of the same symmetric operator of the deficiency indices not exceeding N (the domain of which is ob- tained by imposing the conditions ψj(0) = ψ′ j(0) = eiθAout j (V ψ) at infinity; one is Neumann at the origin and N − 1 satisfy Dirichlet condition there. Keywords: adjoint; quantum; self
• The scientific legacy of Miloslav Havlíček by Campoamor-Stursberg, Rutwig (2025) - As a first decisive advance towards the classification, a detailed procedure to determine fine gradings for the class of classical Lie algebras was given, and an equivalence criterion for fine gradings based on labeled graphs was proposed. We review the main research achievements of Miloslav Havĺıček in algebraic methods in Quantum Theory, his extensive work on realisations of Lie algebras and superalgebras and their representation theory, quantum groups and differential equations. Keywords: algebra; canonical; exner; group; journal; klimyk; lie; lie algebras; m. havĺıček; mathematical; miloslav; operators; physics; pošta; quantum; realisations; representations; theory
• Unitary generation of GHZ states by Bandilla, Arno; Chadzitaskos, Goce; Jex, Igor (2025) - The generation and manipulation of quantum states is one of the standard tasks for physics, particularly in quantum optics. On the level of quantum states two of the crucial properties of quantum mechanics can be demonstrated [3, 4]. Keywords: bell; generation; ghz; quantum; state; transformation
• Time-Dependent and/or Nonlocal Representations of Hilbert Spaces in Quantum Theory by Znojil, M. (2010) - Appendix A: Hilbert space in our present notation In our review paper Hilbert space H(F ). Keywords: hilbert; models; phys; quantum; space; theory; vol; znojil
• On Global and Nonlinear Symmetries in Quantum Mechanics by Doebner, H.-D. (2010) - one obtains nonlinear differential operators DN through tangent maps with N ∈ NG. 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 a Hilbert 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. Keywords: differential; k(m; nonlinear; operators; quantum
• Quantum Moment Map and Invariant Integration Theory on Quantum Spaces by Castro, O. Osuna; Wagner, E. (2011) - By an invariant integral we mean a positive linear functional h on X satisfying h(f � x) = ε(f)h(x), x ∈ X , f ∈ U . Then any *-representation π : X → L+(D) leads to a *-re- presentation π ◦ ρ : U → L+(D), and it follows easily from the Hopf algebra structure of U that adL(f)(X) := π(ρ(f(1)))X π(ρ(S(f(2)))), f ∈ U , X ∈ L+(D), (6) defines a left U-action on L+(D) turning it into a U- module *-algebra. Keywords: quantum
• Coquaternionic Quantum Dynamics for Two-level Systems by Brody, D. C.; Graefe, E. M. (2011) - If a coquaternion q has the property that q̄q > 0 and that its imaginary part also has a positive norm so that q21 − q22 − q23 > 0, then q can be written in the form q = |q|eiqθq = |q|(cos θq + iq sin θq), (3) where iq = iq1 + jq2 + kq3√ q21 − q22 − q23 and θq − jq2 − kq3. Keywords: dynamics; hamiltonian; quantum; space; state
• Dynamical Symmetry Breaking in RN Quantum Gravity by Kotvytskiy, A. T.; Kruchkov, D. V. (2011) - Then,√ −g̃ � √ −g − hμνKμν − hμνhαβFμναβ � √ −g − hμνKμν + hμνhαβFμναβ 2 √−g − (24) (hμνKμν)2 8 √ −g3 . Then, for the scalar curvature we get R = gμνRμν � 1 2 ( ημν − hμν + hμρhν ρ ) × (13)( ∂α∂μhα ν − ∂α∂αhμν − ∂μ∂νh + ∂α∂νhα μ + O(h2) ) Keywords: background; breaking; metric; quantum; symmetry
• Non-Hermitian Star-shaped Quantum Graphs by Znojil, Miloslav (2013) - [4] J. Železný, The Krein-space theory for non-Hermitian PT-symmetric operators (MSc thesis, FNSPE CTU, 2011); [5] P. Siegl, Non-Hermitian quantum models, indecomposable representations and coherent states quantization (PhD thesis, Univ. This being said, one of the most efficient ways of ad- dressing these technical challenges has been described in [11] and generalized, to nontrivial graphs, in its sequel [12]. Keywords: graphs; phys; quantum; star; znojil
• RESONANCES ON HEDGEHOG MANIFOLDS by Exner, Pavel; Lipovský, Jiří (2013) - 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. Resolvent and scattering resonances are shown to coincide in this situation. Keywords: asymptotics; case; function; hedgehog; manifold; quantum; resonances
• EXAMPLES OF QUANTUM HOLONOMY WITH TOPOLOGY CHANGES by Cheon, Taksu; Tanaka, Atushi; Turek, Ondřej (2013) - Keywords: quantum graph, boundary condition, eigenvalue holonomy. Here we examine the influence of the topology of quantum graphs on spectral properties, taking inspi- ration from the works [1] and Keywords: a(θ; c(θ; quantum
• THE COUPLED-CLUSTER APPROACH TO QUANTUM MANY-BODY PROBLEM IN A THREE-HILBERT-SPACE REINTERPRETATION by Bishop, Raymond F.; Znojil, Miloslav (2014) - 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. doi: 10.1103/PhysRevA.55.2686 92 http://dx.doi.org/10.1016/0003-4916(83)90284-1 http://dx.doi.org/10.1103/PhysRevA.36.2519 http://dx.doi.org/10.1007/BF01119617 http://dx.doi.org/10.1016/0003-4916(92)90284-S http://dx.doi.org/10.3842/SIGMA.2009.001 http://dx.doi.org/10.1088/1751-8113/41/24/244026 http://dx.doi.org/10.1016/0375-9474(71)90122-9 http://dx.doi.org/10.1103/PhysRevLett.80.5243 http://dx.doi.org/10.1088/0034-4885/70/6/r03 http://dx.doi.org/10.1088/1751-8113/40/32/R01 http://dx.doi.org/10.1142/S0219887810004816 http://dx.doi.org/10.1088/1751-8113/44/41/415305 http://dx.doi.org/10.1088/1751-8113/42/15/153001 http://dx.doi.org/10.1023/B:CJOP.0000044002.05657.04 http://dx.doi.org/10.1038/nphys1515 http://dx.doi.org/10.1103/PhysRevA.83.042111 http://dx.doi.org/10.1103/PhysRevA.36.2539 http://dx.doi.org/10.1007/978-3-642-61330-2_4 http://dx.doi.org/10.1103/PhysRevA.55.2686 Acta Polytechnica 54(2):85–92, 2014 1 Introduction 2 THS representation of a quantum system 2.1 Inspiration: Fourier transform 2.2 Non-unitary mappings Omega = exp(S) 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: ccm; cluster; doi; hamiltonian; hermitian; hilbert; operator; quantum; space; state; ths
• IS PT-SYMMETRIC QUANTUM THEORY FALSE AS A FUNDAMENTAL THEORY? by Znojil, Miloslav (2016) - Rev. Lett. 112, 130404 (2014)) that the “recent extension of quantum theory to non-Hermitian Hamiltonians” (which is widely known under the nickname of “PT -symmetric quantum theory”) is “likely false as a fundamental theory”. By their opinion their results “essentially kill any hope of PT -symmetric quantum theory as a fundamental theory of nature”. Keywords: hilbert; phys; quantum; space; theory
• COVARIANT INTEGRAL QUANTIZATIONS AND THEIR APPLICATIONS TO QUANTUM COSMOLOGY by Gazeau, Jean-Pierre (2016) - Keywords: integral quantization; covariance; POVM; affine group; Weyl-Heisenberg group; coherent states; FRW model; smooth bouncing. Integral quantization: general setting and POVM Let (X, ν) be a measure space. Keywords: affine; gazeau; group; j.-p; operator; quantization; quantum; space; weyl
• Measurement of a quantum particle position at two distant locations: a model by Dittrich, Jaroslav (2022) - In the matrix notation C(t, r) = ( c00(t, r) c01(t, r) c10(t, r) c11(t, r) ) , E = ( E0 0 0 E1 ) , (11) F (r) = ( f00(r +R) f01(r +R) f10(r +R) f11(r +R) ) , (12) G(r) 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∂2 r − ℏ2 2M ∂2 x + V (x+R) − ℏ2 2M ∂2 y + V (y −R) , (2) understood as a self-adjoint operator in the state space L2(R3) with the domain H2(R3). Keywords: detection; detectors; measurement; particle; quantum
• Linearised coherent states for non-rational SUSY extensions of the harmonic oscillator by Contreras-Astorga, Alonso; Fernández C., David J.; Muro-Cabral, César (2022) - 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: extensions; harmonic; ladder; operators; oscillator; physics; quantum; states; susy
• Quantum description of angles in the plane by Beneduci, Roberto; Frion, Emmanuel; Gazeau, Jean-Pierre (2022) - Finally, we demonstrated that the isomorphism C2 ≃ R4 allows to write Bell states in real space, with the introduction of the “flip” operator (46). A quantum measurement corresponds to an affine map S(H) 7→ M+(Ω) from quantum states to probability measures, ρ 7→ µρ. Keywords: cos; plane; quantum; sin; space; states
• Pseudo-Hermitian Operators in a Description of Physical Systems by Jakubský, V. (2007) - In other words, there should hold � � � �� � � �1 2 1 20 0 0 0( ), ( ) ( ) ( ), ( ) ( )� U t U t . Thus, we may write the resulting scalar product of two solutions �i of the Klein- -Gordon equation in the following form � �( , ) ( , ) , � , � , � � � � � � � � � � � 1 2 1 2 1 2 1 2 1 1 2 1 � � � � � � � � �� m i m � �� � � �2 1 2 1 1� � �� , , ( , ). Keywords: phys; pseudo; quantum; vol; � �
• 25 Years of Quantum Groups: from Definition to Classification by Stolin, A. (2008) - (15) We see that, by a suitable choice of parameters a, b and z2, we can add to the XXZ Hamiltonian an arbitrary linear com- bination of the terms � � � �k z k k Set � � �� I I� �, where � �I � is an orthonormal basis of g with respect to the Killing form. Keywords: lie; quantum; u u; � �

• Superconformal Calogero Models as a Gauged Matrix Mechanics by Fedoruk, S. (2010) - = 1 superconformal systems must possess N = 4 supersymmetry The hermitian n×n-matrix field Xb a(t), (Xb a) = Xa b , a, b = 1, . . Keywords: action; calogero; gauge; phys; superconformal
• Higher-Spin Triplet Fields and String Theory by Sorokin, D. (2010) - In particular, I would like to discuss a sys- tem of higher spin fields which are called triplets. People have worked in this direction since the early years of String Theory, and this is how, for example, the system of higher spin triplet fields was first found [4]. Keywords: fields; formulation; gauge; phys; spin; string; theory; triplet
• Gause Symmetry and Howe Duality in 4D Conformal Field Theory Models by Todorov, I. (2010) - Simple symmetries: Gen- eralizing conformal field theory, J. Math. Phys. B670 (2003) 373–400; hep-th/0305200. 60 Acta Polytechnica Vol. 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. Keywords: algebras; conformal; fields; group; infinite; lie; math; phys; space; theory
• Asymptotic Power Series of Field Correlators by Caprini, I.; Fischer, J.; Vrkoč, I. (2010) - [6] Caprini, I., Fischer, J., Vrkoč, I.: J. Phys. ap-3-10.dvi Acta Polytechnica Vol. 50 No. 3/2010 Asymptotic Power Series of Field Correlators I. Caprini, J. Fischer, I. Vrkoč Keywords: function; lemma; phys
• Does a Functional Integral Really Need a Lagrangian? by Kochan, D. (2010) - =∫ Rn[q1] dq1A∗(q1, t1 | q̃0, t0)A(q1, t1 | q0, t0) , δ(q1 − q0) = lim t1→t0 A(q1, t1 | q0, t0) . [1], the probability amplitude of the transition of a system from the space-time con- figuration (q0, t0) to (q1, t1) is given as follows: A(q1, t1 | q0, t0) ∝∫ Keywords: integral; phys
• Current Exchanges for Reducible Higher Spin Modes on AdS by Fotopoulos, A.; Tsulaia, M. (2011) - References [1] Vasiliev, M. A.: Fortsch. Bekaert, X., Cnock- aert, S., Iazeolla, C., Vasiliev, M. A.: [arXiv:hep- th/0503128]. Keywords: arxiv; hep; phys
• The Problem of Predecessors on Spanning Trees by Poghosyan, V. S.; Priezzhev, V. B. (2011) - Keywords: loop erased random walk, spanning trees, Kirchhoff theorem, Abelian sandpile model. In Section 2 we concentrate on a particular problem of probability P (1) when points i and j are nearest neighbors of the square lattice. Keywords: lattice; phys
• The Two-dimensional Harmonic Oscillator on a Noncommutative Space with Minimal Uncertainties by Dey, Sanjib; Fring, Andreas (2013) - |00〉, a†i |n1n2〉 = √ ni + 1 ∣∣(n1 + δi1)(n2 + δi2) 〉 , ai|00〉 = 0, ai|n1n2〉 = √ ni ∣∣(n1 − δi1)(n2 − δi2) 〉 , (9) for i = 1, 2, such thatH2D ho |nl〉 = E (0) nl |nl〉. Keywords: noncommutative space, non-Hermitian operators, 2D-systems. Keywords: oscillator; phys
• Complex Covariance by Kleefeld, Frieder (2013) - [38] being the vacuum speed of light and set γ = γ (See the discussion of Eq. 297 Frieder Kleefeld Acta Polytechnica • Option 2: Choose c and v to be (anti)parallel in the complex plane, i.e., c = ±|c| · v |v| = ± ∣∣ c v ∣∣ · v with |c| = 299792458m/s [38] being the vacuum speed of light, and set γ = γ (See the discussion of Eq. (4.14)!). Keywords: complex; phys; space
• Spectral Singularities do not Correspond to Bound States in the Continuum by Mostafazadeh, Ali (2013) - 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; phys
• TRACKING DOWN LOCALIZED MODES IN PT-SYMMETRIC HAMILTONIANS UNDER THE INFLUENCE OF A COMPETING NONLINEARITY by Bagchi, Bijan; Modak, Subhrajit; Panigrahi, Prasanta K. (2014) - Class II solutions On the other hand, if we choose the extended Rosen- Morse potential to have the form V (x) = −a(a+ 1) sech2 x− V1 sech 2 κ x, W (x) = 2b tanh x, κ ∈ R \ {0} (8) then Eq. (3) enjoys a solution Φ(x) = Φ0 sech 1 κ x eiµx (9) 80 vol. The figure at the right corresponds to the evaluation of Class II solution under the same parametrizations. Keywords: doi; lett; nonlinear; phys; potential; rev
• THE FLOQUET METHOD FOR PT-SYMMETRIC PERIODIC POTENTIALS by Jones, H. F. (2014) - This phenomenon is particularly interesting for the case of periodic PT -symmetric potentials, where unusual band structures may occur [7, 8]. Keywords: band structure, PT symmetry, Floquet method. Keywords: phys
• STABILITY OF BOSE-EINSTEIN CONDENSATES IN A PT-SYMMETRIC DOUBLE-δ POTENTIAL CLOSE TO BRANCH POINTS by Löhle, Andreas; Cartarius, Holger; Haag, Daniel; Dast, Dennis; Main, Jörg; Wunner, Günter Wunner (2014) - 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. For increasing 135 A. Löhle, H. Cartarius, D. Haag et al. Acta Polytechnica 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 κ , ω γ γ κ Re(ω) Im(ω) Re(κ) Keywords: bifurcation; doi; phys; stability; symmetric
• PT-symmetry and Integrability by Fring, A. (2007) - It is crucial to note that the ��-operator is an anti-linear operator, i.e. it acts as �� �� ��( ) * * � �� � � �� � � with �, �� and �, � being some eigenfunctions. (10) Therefore the Hamiltonians H V E W W Em m m m m m� �� � � � � � � � � �� � 2 (11) are isospectral H Keywords: h �; hermitian; m �; phys; q �; vol; � -symmetry; � �

• A Constellation Space Dimensionality Reduced Sub-Optimal Receiver for Orthogonal STBC CPM Modulation in a MIMO Channel by Hekrdla, M. (2009) - The physically distinguishable phase is due to the harmonic func- tion periodicity taken � � �� ( ) mod2 . The information-car- rying tilted phase is � � �( , ) ( , ) ( )t t h M Tsd d� � �1 1 , where�( , )t d is the original classic CPM phase. Keywords: b �; cpm; d �; h �; l �; s t; s �; space; t t; vn �; � �
• Lorentz and SU(3) Groups Derived from Cubic Quark Algebra by Kerner, R. (2010) - There is one drawback here, namely, the multi- plication does not close under the Z3-graded ternary commutator: one needs to form real and imaginary combinations of K and K̄ cubic matrices in order to make the corresponding ternary algebra complete. For α′ = 1′ the ρ-matrix on the right-hand side is ρ1 ′ A′B′C′ , which has only three components, ρ1 ′ 1′2′1′ = 1, ρ1 ′ 2′1′1′ = j2, ρ1 Keywords: algebra; generators; indices; matrices; quark; space
• Algebraic Solutions in Open String Field Theory – a Lightning Review by Schnabl, M. (2010) - 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. What is string field theory? Keywords: field; space; string; theory
• Idealized Compression Ratio for a Screw Briquetting Press by Biath, Peter; Ondruška, Juraj (2012) - The re- sults will clarify how the material changes in volume during compaction (although only idealized), and will be of great benefit to further research and develop- ment of screw presses. The research area focuses on the principle of screw presses due to the achievement of the high- est with a view to achieving the highest quality pro- duction using this principle. Keywords: compression; ratio; screw; space
• LAPLACE-RUNGE-LENZ VECTOR IN QUANTUM MECHANICS IN NONCOMMUTATIVE SPACE by Prešnajder, Peter; Gáliková, Veronika; Kováčik, Samuel (2014) - 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: lrl; operators; space; vector
• THE AHARONOV-BOHM HAMILTONIAN WITH TWO VORTICES REVISITED by Košťáková, Petra; Stovicek, Pavel (2016) - 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 + ∆ ) Fix a point x ∈ M̃ . Keywords: operator; propagator; space
• Comparative study of state space averaging and PWM with extra element theorem techniques for complex cascaded DC-DC Buck converter by Shete, Sangeeta; Joshi, Prasad (2023) - Analytical techniques for DC DC converters and 1Φ inverters: A comprehensive review. Simplified analysis of PWM converters using model of PWM switch. Keywords: circuit; complex; converter; figure; modelling; pwm; space; state; switch

• Optical Properties of Erbium and Erbium/Ytterbium Doped Polymethylmethacrylate by Prajzler, V.; Jeřábek, V.; Lyutakov, O.; Hüttel, I.; Špirková, J.; Machovič, V.; Oswald, J.; Chvostová, D.; Zavadil, J. (2008) - 3 displays the FT-IR spectra of PMMA layers doped with Er3� ions (ErCl3) in the wavelength range from 4000 to 2600 cm�1. � The Er3� doped PMMA samples exhibited a typical emis- sion at 1530 nm, due to the Er3� intra-4f 4I13/2 � 4I15/2 only at samples with higher content of Er3� ions. Keywords: er3; fig; ions; samples; vol; yb3
• Angular Distribution of GRBs by Balázs, L. G.; Mészáros, A.; Horváth, I.; Bagoly, Z.; Veres, P.; Tusnády, G. (2012) - In Kippen, R. M., Mallozzi, R. S., Fishman, G. J. (eds.): AIP Conf. [23] Fishman, G. J., Meegan, C. A., Wilson, R. B., et al.: Keywords: apj; distribution; grbs; point; samples; variables
• DEFORMATION RESPONSE OF GELLAN GUM BASED BONE SCAFFOLD SUBJECTED TO UNIAXIAL QUASI-STATIC LOADING by Kytyr, Daniel; Krčmářová, Nela; Šleichrt, Jan; Fíla, Tomáš; Koudelka, Petr; Gantar, Ana; Novak, Sasa (2017) - 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 GG samples with 50 wt% BAG for the compression test under dry conditions. Keywords: bag; conditions; gg samples; gg00; gg50; gg70; kpa; samples; strain; test
• Properties of Erbium Doped Hydrogenated Amorphous Carbon Layers Fabricated by Sputtering and Plasma Assisted Chemical Vapor Deposition by Prajzler, V.; Burian, Z.; Jeřábek, V.; Hüttel, I.; Špirková, J.; Gurovič, J.; Oswald, J.; Zavadil, J.; Peřina, V. (2008) - 4 Conclusion We report on carbon layers doped with erbium ions de- posited by sputtering, by PACVD and by magnetron sputter- ing onto a silicon or glass substrate. 5: The schema of magnetron sputtering set-up The absorbance spectrum of erbium doped carbon layers fabricated by magnetron sputtering is given in Fig. Keywords: carbon; erbium; films; layers; samples; sputtering; vol

• Non-Contact Monitoring of Heart and Lung Activity by Magnetic Induction Measurement by Steffen, M.; Leonhardt, S. (2008) - - 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. 2: Concept of magnetic induction measurements [9]. Keywords: fig; heart; induction; measurement; monitoring; � �
• Unobtrusive Health Screening on an Intelligent Toilet Seat by Schlebusch, T. (2011) - Keywords: monitoring of vital parameters, personal healthcare, ambient assisted living, electrocardiogram, bioimpe- dance, toilet seat. 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 ECG measurement is shown in Fi- gure 6. Keywords: bis; body; ecg; electrodes; measurement; seat; toilet; toilet seat; vol
• Determination of Uncertainties for Correlated Input Quantities by the Monte Carlo Method by Goliaš, Marcel; Palenčár, Rudolf (2012) - 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. = 2.15 mm2 = 21 · 10−1 mm2, a = 21, r = −1, δ = 1 2 · 10−1 mm2 = 0.05 mm2 (5) 59 Acta Polytechnica Vol. 52 No. 4/2012 Figure 3: The distribution functions of the rectangle for the output quantity Table 3: Validation of the law of propagation of uncertainty by Monte Carlo simulation Keywords: carlo; measurement; monte; uncertainty
• Checking the Geometric Accuracy of a Machine Tool for Selected Geometric Parameters by Janásek, Adam; Čep, Robert; Brychta, Josef (2012) - 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: measurement; test
• Femoral Test Bed for Impedance Controlled Surgical Instrumentation by Brendle, Christian; Niesche, Annegret; Korff, Alexander; Radermacher, Klaus; Leonhardt, Steffen (2012) - 3.1 Electrical contacting The Agilent E4890A LCR Meter has four BNC con- nectors used for impedance measurements, two for the low connector pair and two for the high connector pair. The ε′′r of BC values are in accordance with the published values for PMMA. Keywords: figure; hip; impedance; measurement; pmma; values; wall
• VERIFICATION OF CENSUS DEVICES IN TRANSPORTATION RESEARCH by Petrů, Jan; Kludka, Michal; Krivda, Vladislav; Mahdalova, Ivana; Zeman, Karel (2015) - 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. Acta Polytechnica Direction to Opava Hypermarket Globus Direction to center Fig. 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: counting; devices; measurement; metrics; number; speed; traffic; vehicles
• PRIMARY PEAK RATIO CORRELATION TO THE MEASUREMENT ACCURACY OF PIV METHOD by Novotny, Jan; Machovska, Ilona (2018) - [1] IA Interrogation area CFT Couette Flow test PIV Particle Image Velocimetry SCC Standard Cross-correlation UFT Uniform Flow test Acknowledgements Technological Agency, Czech Republic, program Center of Competence, project #TE01020020 Josef Božek Com- petence Centre for Automotive Industry, The ministry of education, Youth and Sports program NPU I (LO), project #LO1311, Development of Vehicle Centre of Sustainable Mobility. [8] Z. Xue, J. Charonko and P. Vlachos, “Signal-to-noise ratio, Error and Uncertainty of PIV measurement,” in International Symposium on Particle Image Velocimetry, Delft, The Netherlands, 2013, July 1-3. https://repository.tudelft.nl/islandora/object/ uuid:a6270b28-1132-4186-817e-259eef0e9d87/ datastream/ Keywords: correlation; displacement; error; measurement; metric; peak; value
• Measurement of Two Phase Flow by Novotný, J.; Nožička, J.; Adamec, J.; Nováková, L. (2005) - Np fr� � trough the following equation: � � � � � � � � � � � � � � � � � � � � arcsin cos sin d z m m a 2 2 2 1 22 m � � � � � � � � � � � � cos � 2 . After exhaustion of both chambers and fixation of both pressures, stopcock C is opened and the saturated steam flows through the overheater into the measurement area with lower pressure steam. Keywords: measurement; particle; size; steam; � �

• Accuracy of Determining Stress Intensity Factors in Some Numerical Programs by Vorel, M.; Leidich, E. (2001) - False values at crack edges are generally caused by some unsuitable treatment of the singularities which always exist at the ends of a crack front 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. Keywords: crack; factors; franc3d; intensity; marc; mesh; programs; stress; � �
• Fatigue Crack Initiation and Early Growth in GLARE 3 Fiber-metal Laminate Subjected to Mixed Tensile and Bending Loading by Chlupová, A.; Heger, J.; Vašek, A. (2001) - 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. Relation (2) holds for v in �m and �layer in MPa and can also be used for predicting the crack growth rate and/or residual life in all metal layers of the laminate when �layer is known. Keywords: crack; fatigue; layer; metal; stress
• CALCULATION OF STRESS AND DEFORMATION IN FUEL ROD CLADDING DURING PELLET-CLADDING INTERACTION by Halabuk, Dávid; Martinec, Jiří (2015) - 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: cladding; deformation; fuel; pellet; stress
• NUMERICAL SIMULATIONS OF STATIC STRENGTH OF NOVEL DENTAL IMPLANTS by Řehounek, Luboš; Denk, František; Jíra, Aleš (2018) - Both implants belong to the “push-in” category of dental implants. is generally not enough space (e.g., in between two roots of adjacent teeth). All analysed implants are from the “push-in” category of dental implants. Keywords: implant; ribs; stem; stress; variant
• Numerical Simulation of Stresses in Thin-rimmed Spur Gears with Keyway by Brůžek, B.; Leidich, E. (2003) - [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. 7. 8 Length of the key In the practice the variant with the flush hub and key of- ten occurs. 9: Stress distribution in the loaded root of the tooth (left) and in the keyway (right) for one-sided torque distribution; � � 2.5°; mod- ule 2 mm; normal force on tooth Z3; �, �: see Fig. 7 0,2 0,4 0,6 0,8 1 5 10 15 20 25 30 35 40 -800 -600 -400 -200 0 200 400 600 800 -800 -600 -400 -200 0 200 400 600 800 0 0,2 0,4 0,6 0,8 5 10 15 20 25 30 35 40 -200 0 200 400 600 800 1.000 1.200 1.400 -200 0 200 400 600 800 1.000 1.200 1.400 z Keywords: keyway; root; stress; tooth; � �
• EFFECTS ON THE FINAL INTENSITY OF INPUT FORCES IN LONGBOLTS INSTALLED AT THE MINING OPERATION 2 AREA, OKD, INC. by Dvořák, Pavel; Jiránková, Eva (2018) - 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 order to avoid a massive stratification of the overburden, a system of reinforcement of mining works was designed using a rock bolt reinforcement and various types of long bolts (cable bolts, strand bolts). Keywords: bolting; bolts; force; input; intensity; ir-6; loss; mining; stress; stressing
• Efficient Analytical Model for Calculation of the Influence Zone inside the Subsoil below Foundations Slabs by Kuklík, P.; Kopáčková, M. (2004) - h Hz w w1 2� � � �( ) ( )� � � . Conse- quently, only the odd terms, j n� �2 1, n �0 1 2, , ,�, in series (1) are considered. Keywords: influence; stress; � z; � �
• NON-LINEAR ANALYSIS OF SLENDER MASONRY COLUMN SUBJECTED TO BIAXIAL BENDING by Vokál, Marek; Drahorád, Michal (2021) - The results of this study are also compared to the results of laboratory tests of masonry columns. In the study of non-linear be- haviour of masonry columns, six basic possibilities are used, see Figure 8, the rigid plastic can be seen in Figure 9: Linear-plastic, parabolic-plastic (parabolic- rectangular) and rigid-plastic diagrams are given in [1]. Keywords: column; cross; figure; linear; masonry; non; plastic; section; shape; strain; stress
• Solid Modeling and Finite Element Analysis of an Overhead Crane Bridge by Alkin, C.; Imrak, C. E.; Kocabas, H. (2005) - . Hoisting Velocity : VH � 2.7 m/min Total duration of use : U4 Load spectrum class : Q3 Appliance group : A5 Loading type : H (main load) Dynamic coefficient : � � 1.15 Amplifying coefficient : �c � 1.11 Table 1: Bridge property values dynamic coefficient, and the two most unfavourable horizon- tal effects, excluding the buffer forces. In this study, the calculations apply the F. E. M. rules and DIN standards, which are used for box girder crane bridges. Keywords: bridge; crane; element; finite; girder; node; overhead; stress; vol; � �
• Estimation of stresses in a massive granite using laser ultra-sonic testing and stress memory effect by Kašpar , Ondřej; Kravcov, Alexander; Štoller, Jiří; Kubeček, Petr; Vnuk, Radovan; Zušťák, Zbyněk (2023) - However, since available archive materials do not have the level of detail that is required for a numerical simulation, the vertical stresses in the rock mass were calculated under the assumption that rock stress changes with depth as a result of geostatic load, according to which the expression for vertical stresses is as follows σ = ρ g h, (4) where habb is the depth. ISRM suggested methods for rock stress estimation – Part 2: overcoring methods. Keywords: effect; emission; granite; methods; pb1; rock; situ; specimens; stress; stresses
• Influence of localised corrosion shape on adhesive damage and a bonded assembly under thermo-mechanical loading by Berrahou, Mohamed; Zahraoui, Mehdi; Hocine, Kamel; Djebbar, Samir; Guermit, Youcef; Benzineb, Hayet (2025) - Stress corrosion cracking behaviour of 7xxx aluminum alloys: A literature review. Tensile property values as a function for different corrosion shapes. 3.2.3. Keywords: adhesive; composite; confidence; corrosion; crack; figure; shape; square; stress

• Resistance Spot Welding of dissimilar Steels by Kolařík, Ladislav; Sahul, Miroslav; Kolaříková, Marie; Sahul, Martin; Turňa, Milan; Felix, Michal (2012) - The aim of our paper is to analyze and compare the prop- erties of resistance spot welds of low carbon steel and austenitic stainless steel. The first one was done in austenitic stainless steel across the weld nugget and the other in low carbon steel through HAZ and the weld nugget. Keywords: carbon; resistance; spot; steel; welding
• Explosion Cladding of Lead on Steel by Turňa, Milan; Ondruška, Jozef; Turňová, Zuzana (2012) - 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. ap-3-12.dvi Acta Polytechnica Vol. 52 No. 3/2012 Explosion Cladding of Lead on Steel Milan Turňa1, Jozef Ondruška1, Zuzana Turňová1 1Slovak 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: lead; max; steel; test; welding
• A MATHEMATICAL MODEL OF GALVANIC CORROSION UNDER THE CONDITIONS OF A THIN ELECTROLYTE FILM by Jeníček, Vít; Diblíková, Linda (2016) - A mathematical model of galvanic corrosion under the conditions of a thin electrolyte film was used to evaluate atmospheric corrosion. Keywords: atmospheric corrosion, galvanic corrosion, modelling, weight loss. Keywords: bolt; corrosion; curves; exposure; galvanic; loss; polarization; steel; weight; weight loss
• Verification of the Wind Response of a Stack Structure by Makovička, D.; Král, J.; Makovička, D. (2003) - The probable magnitude of the response of the structure to wind effects under the design load could then be estimated by multiplying the ascertained response by the ratio of the squares of the design and measured wind velocities in accordance with the above considerations. 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. Keywords: frequencies; response; steel; structure; wind; wind velocity
• Magnetization of Steel Building Materials and Structures in the Natural Geomagnetic Field by Čermáková, E. (2005) - 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. 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: building; field; fig; geomagnetic; magnetic; steel; � �

• Faraday Cup for Electron Flux Measurements on the Microtron MT 25 by Vognar, M.; Šimáně, Č.; Chvátil, D. (2001) - AP1_01.vp © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 11 Acta Polytechnica Vol. 41 No.1/2001 1 Introduction The study of electron induced radiation effects requires a good knowledge of the value of electron flux density during irradiation. Keywords: microtron, Faraday cup, electron beams, electron flux measurement Fig. Keywords: beam; cup; electron; faraday; faraday cup; window
• Some Aspects of Profiling Electron Fields for Irradiation by Scattering on Foils by Šimáně, Č.; Vognar, M.; Chvátil, D. (2001) - � ��0 2 137� �Ze hc Z � � � � � � � �g x E x E x sZx AE� � � � 0 01 0153 19 45. MeV � � � ��1 2 1 2 0 22� K f x mc � x = foil thickness Keywords: beam; electron; scattering; � �
• Measuring the Process Parameters of the IBAD Method by Zoriy, M.; Černý, F.; Palamarchuk, D.; Konvičková, S.; Hüttel, I. (2003) - We therefore need to perform a mathematical procedure to transform ion beam density into atomic nitrogen flux. l0-lsc - electron charge magnitude; P1g - flux of atomic nitrogen ions; P2^*' - flux of molecular nitrogen ions; P - total flux of ions; N1,'- flux of nitrogen atoms included in atomic nitrogen ions; N2.iy - flux of nitrogen atoms included in molecular nitrogen ions; N - total flux of nitrogen atoms. Keywords: atoms; beam; flux; ion; ions; nitrogen

• Advanced Functions of a Modern Power Source for GMAW Welding of Steel by Kolařík, Ladislav; Kolaříková, Marie; Kovanda, Karel; Pantůček, Marek; Vondrouš, Petr (2012) - 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; function; root; sample; short; transfer; welding
• A geopolitics of the diaspora of British engineers in South America in the first half of the 20th century: the cases of the Institution of Locomotive Engineers centre in Argentina by Rodríguez Ortiz, Jorge Alonso (2024) - During the sessions the call was made: “I appeal to all present to join and to do everything possible to make ourselves into a real live body, which will result in cementing the good feeling and unity of purpose which already exist among railway engineers of all grades and nationalities in these great South Ameri- can Republics.” Licensed under a CC-BY 4.0 licence Published by the Czech Technical University in Prague A GEOPOLITICS OF THE DIASPORA OF BRITISH ENGINEERS IN SOUTH AMERICA IN THE FIRST HALF OF THE 20th CENTURY: THE CASES OF THE INSTITUTION OF LOCOMOTIVE ENGINEERS CENTRE IN ARGENTINA Jorge Alonso Rodríguez Ortiz Czech Technical University in Prague, Faculty of Electrical Engineering, Historical Laboratory of (Electro)Technology, Technická 2, 166 27 Prague, Czech Republic correspondence: rodrijor@fel.cvut.cz Abstract. Keywords: american; british; centre; century; circulation; development; diaspora; engineering; engineers; history; institution; journal; knowledge; locomotive; members; railway; south; south america; technology; transfer

• Finite Automata Implementations Considering CPU Cache by Holub, J. (2007) - However, it may lead to an exponential increase of number of states (2Q NFA states, where QNFA is the number of states of the original NFA). 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. Keywords: automata; automaton; dfa; finite; implementation; state; transition
• GRS 1758–258: RXTE Monitoring of a Rare Persistent Hard State Black Hole by Obst, M.; Pottschmidt, K.; Lohfink, A.; Wilms, J.; Böck, M.; Smith, D. M.; Tomsick, J. A.; Kreykenbohm, I. (2011) - [10] Reid, M. J., McClintock, J. E., Narayan, R., et al.: 2011, arXiv:1106.3688. Typical hard state fluxes after taking into account the Galactic ridge emission are 0.2–0.4 keV s−1 cm−2. Keywords: black; rxte; state
• NON-THERMAL EMISSION FROM CATACLYSMIC VARIABLES: IMPLICATIONS ON ASTROPARTICLE PHYSICS by Šimon, Vojtech (2013) - [18] Harrison, T. E. et al., 2010, ApJ, 710, 325 [19] Heise, J. et al., 1985, A&A, 148, L14 [23] José, J. et al., 2006, NuPhA, 777, 550 Keywords: accretion; cvs; emission; gamma; radio; state
• IMPACT OF PLASTIC DEFORMATION ON THE PROPERTIES OF A SELECTED ALUMINIUM ALLOY by Lišková, Anna; Lacková, Petra; Mihaliková, Mária; Kočiško, Róbert (2016) - They are generally present in Al alloys aged to maxi- mum hardness; β′ are rod-shaped precipitates with a hexagonal structure and are found in overegged speci- mens; β (Mg2Si) is an equilibrium phase in the pre- cipitation sequence. Keywords: intensive plastic deformation; aluminium alloy; tensile test. Keywords: alloy; aluminium; deformation; ecap; figure; fracture; plastic; state
• ON THE SPECTRUM OF THE ONE-DIMENSIONAL SCHRÖDINGER HAMILTONIAN PERTURBED BY AN ATTRACTIVE GAUSSIAN POTENTIAL by Fassari, Silvestro; Gadella, Manuel; Nieto, Luis Miguel; Rinaldi, Fabio (2017) - It is worth pointing out that the latter quantity is nothing else but the limit, as ε→ 0+ of the trace class norm of Baε , since ‖Baε ‖1 = 1√ 2π ∫ +∞ −∞ e−p 2 sinh p2 p2 + ε2 dp = √ π 23ε2 ( 1− e2ε2 erfc( √ 2ε) ) , (20) which ensures the convergence in the norm topology of trace class operators, as a consequence of a well-known theorem on operators belonging not only to the trace class T1 but to any ideal Tp (see [11]). Keywords: Schrödinger equation; Gaussian potential; Birman-Schwinger method; trace class operators; Fredholm determinant. Keywords: operator; state
• Nondestructive Damage Detection Based on Modal Analysis by Plachý, T.; Polák, M. (2004) - For damage detection and localization on this bridge the use of natural frequency changes, changes of mode surface curvature CAMOSUC( j),x, changes of modal flexibil- ity matrix �[�] and the second derivative of changes of the di- agonal members of a modal flexibility matrix �[ ]� �� proved to be appropriate. Keywords: modal analysis, natural mode, natural frequency, damage detection, MAC, COMAC, service life, fatigue. Keywords: bridge; change; fig; modal; state
• Deformation Stress State of Elastic Bodies by Skokánek, J. (2005) - d dsfN F A� � � �� � �� � �cos cos cos . This means that the positive part of the internal force F2(+) gener- ated by the positive deformation force effect on the half of the element above the cross section surface is in equilibrium with the negative part of the internal force F2(�) generated by the negative deformation force effect F F2 2 0( ) ( )� �� � . Keywords: deformation; deformation stress; force; state; stress state; stress �; � cos; � �
• Czechoslovak and Polish intelligence (cryptologic) services at the time of the institutionalisation of both states and their armies after 1918 by Kyselka, Daniel; Efmertová, Marcela (2024) - It also worked on improv- ing the rights of Czechoslovak intelligence officers. He divided military schools into higher, secondary, and lower and distinguished between types of military courses. Keywords: army; courses; cryptologic; czechoslovak; department; education; enigma; french; general; german; intelligence; isbn; military; mission; officers; poland; polish; praha; růžek; schools; services; staff; state; war; world

• Thermal – Oxidation Stability of Insulating Fluids by Semančík, P.; Cimbala, R.; Záliš, K. (2008) - [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: Keywords: oil; orgrez; oxidation; stability; test
• HYBRID SHEARWALL SYSTEM — SHEAR STRENGTH AT THE INTERFACE CONNECTION by Wirth, Ulrich; Shirali, Nuri; Křístek, Vladimír; Kurth, Helmut (2013) - shear wall and the interface behavior. 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: bars; column; interface; shear; specimen; test; wall
• Pseudorandom Testing – A Study of the Effect of the Generator Type by Fišer, P.; Kubátová, H. (2005) - 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: bist; faults; fig; lfsr; number; patterns; pseudo; seed; test

• Technical Evolution of Medical Endoscopy by Gross, S.; Kollenbrandt, M. (2009) - 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. The increased significance of endoscopic images by means of image processing is the topic of section 8. Keywords: body; camera; endoscopy; field; images; imaging; light; medical; section; technical; video; vol
• ACCRETION DISKS WITH A LARGE SCALE MAGNETIC FIELD AROUND BLACK HOLES by Bisnovatyi-Kogan, Gennady; Klepnev, Alexandr S.; Lovelace, Richard V.E. (2013) - We consider accretion disks around black holes at high luminosity, and the problem of the formation of a large-scale magnetic field in such disks, taking into account the non-uniform vertical structure of the disk. Jets are observed in objects with black holes: collimated ejection from accretion disks. Keywords: accretion; bisnovatyi; disk; field; kogan; region; scale
• MODEL OF HEAT SIMULATOR FOR DATA CENTERS by Novotný, Jan; Nožička, Jiří (2016) - Keywords: data center; cooling; heat simulator; PIV; measurement. 3 Measurement of performance characteristic of heat simulator For the purpose of verifying the functionality of the designed model, it was necessary to carry out several basic measurements. Keywords: field; figure; heat performance; heat simulator; outlet; performance; server
• Numerical Calculation of Electric Fields in Housing Spaces Due to Electromagnetic Radiation from Antennas for Mobile Communication by Geromiller, H.-P.; Farschtschi, A. (2003) - 2: Dependency of maximum electric field strength inside a housing space referred to incident electric field strength (Emax /Einc) over angle of incidence (�) References 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: electric; field
• Magnetic Technique for Nondestructive Evaluation of Residual Stresses by Belyaev, B. A.; Leksikov, A. A.; Ovchinnikov, S. G.; Kraus, I.; Parshin, A. S. (2004) - 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: field; fig; magnetic; sample; stray
• Maxwell-Chern-Simons-Higgs theory by Kulshreshtha, Usha; Kulshreshtha, Daya Shankar; Sihagb, Bheemraj (2022) - − y1)δ(x2 − y2) − 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) Keywords: field; gauge; hamiltonian; higgs; term; theory
• An Improved Version of the Fluxgate Compass Module by Petrucha, V. (2007) - F F F F F F T TEMP-X TEMP-Y TEMP-Z MEAS-X MEAS-Y ME � � � � � � � � � � AS-Z X Y Z OX OY O � � � � � � � � � � � � � � � � � � � T k k k f f f f f f 0 0 0 0 0 0 Z � � � � � � � � � T , (2) F F F a a a a a a a a a X Y Z � � � � � � � � � � � � � � �11 12 13 21 22 23 31 32 33� � � � � � � � � � � � � � F F F TEMP-X TEMP-Y TEMP-Z , (3) F F F F� � �X Y Z 2 2 2 , (4) � �E n- F F i n RMS MEAS� � �1 1 2 1 . 2: Three types of PCB fluxgate sensors developed at CTU. Keywords: compass; field; fig; fluxgate; sensors; � �

• Toda Tau Functions with Quantum Torus Symmetries by Takasaki, K. (2011) - G−1 − q−W0/2 · exp ( ∞∑ k=1 (−1)ktkJk ) qW0/2G−. Inserting this identity and using the fact that 〈s|G−1 − q−W0/2 = q−s(s+1)(2s+1)/12〈s|, q−W0/2G−1 + |s〉 = q−s(s+1)(2s+1)/12|s〉, we can rewrite Z(s, t) as Z(Q, s, t) = exp ( ∞∑ k=1 tkqk 1− qk ) · q−s(s+1)(2s+1)/6τ(s, T ,0), (13) Keywords: Toda hierarchy, melting crystal model, quantum torus algebra. Keywords: function; tau; toda
• FRACTIONAL CALCULUS AND LAMBERT FUNCTION I. LIOUVILLE–WEYL FRACTIONAL INTEGRAL by Vojta, Vladimír (2014) - du, using the linear substitution x = y + u/W0(1) and the relation ln(W0(1))/W0(1) Its diagonal restriction ν = y gives Γ(y, y) = e−y Γ(1− y) Keywords: function; integral; laplace; transform; w0(eu; ∫ ∞
• NEW APPROACH FOR ONLINE ARABIC MANUSCRIPT RECOGNITION BY DEEP BELIEF NETWORK by Samir, Benbakreti; Boukelif, Aoued (2018) - 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: arabic; character; classification; dbn; figure; function; handwriting; input; layer; learning; network; online; rbm; recognition; training; vector; words
• MULTIVARIATE INTERPOLATION USING POLYHARMONIC SPLINES by Segeth, Karel (2021) - 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 + l)th derivative of u for any l positive. They are often used as basis functions for interpolation as well as approximation. Keywords: basis; function; interpolant; interpolation; polyharmonic; r(x

• Adaptation of an Evolutionary Algorithm in Modeling Electric Circuits by Hájek, J. (2010) - Another strategy, known as DE/best, generates mutation vec- tor u as follows: u � � �x F r rmin ( )1 2 . � � , (8) L L f R N N 1 12norm � � . Keywords: algorithm; population; � �
• ALTERNATIVE SELECTION FUNCTIONS FOR INFORMATION SET MONTE CARLO TREE SEARCH by Lisy, Viliam (2014) - 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; exp3; game; information; player; selection; set; strategy; uct; ● ●
• A Low-complexity Wavelet Based Algorithm for Inter-frame Image Prediction by Usama, S.; Šimák, B. (2002) - The results show that MRVBS is usually better than the FS and TSS algorithms, especially with slow motion video sequences. Zhang and Zafar [8] applied wavelet theory to real-time video com- pression, and proposed multi-resolution motion estimation (MRME). Keywords: algorithm; motion; mrvbs; noise; tss
• Static vs. Dynamic List-Scheduling Performance Comparison by Hagras, T.; Janeček, J. (2003) - i v succ v m i m m i � � � � � � max ( ) , , where succ(vi) is the set of immediate successors of vi and � � � �b level v w vexit exit� � . The � �b level vi� is computed recursively by traversing the DAG upward starting from the exit node vexit as follows: � � � � b level v w b level v ci Keywords: algorithm; level; list; node; scheduling; � �
• MODIFICATION OF HIERARCHICAL AGGLOMERATIVE CLUSTERING WITH COMPLETE LINKAGE FOR OPTIMAL USAGE WITH PASSIVE OPTICAL NETWORKS by Pehnelt, Tomáš; Lafata, Pavel; Nevosad, Marek (2018) - 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: algorithm; attenuation; clustering; clusters; linkage; network; number; pon; units
• A Complexity and Quality Evaluation of Block Based Motion Estimation Algorithms by Usama, S.; Montaser, M.; Ahmed, O. (2005) - Then for frame resolution I×J and frame rate F frames per second, the overall complexity is defined as: Complexity operation� � � � � IJF NM MNx 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 Keywords: algorithm; block; frame; point; search; size �; step; step size; � �
• Robust Watermarking of Video Streams by Polyák, T. (2006) - 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; video; watermark

• Fracture Surfaces of Porous Materials by Ficker, T. (2011) - [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: cement; fracture; porosity; roughness; surfaces
• Physical and Chemical Aspects of the Nucleation of Cement-Based Materials by Demo, Pavel; Sveshnikov, Alexey; Hošková, Šárka; Ladman, David; Tichá, Petra (2012) - Possible connections with the corresponding properties for cement paste are discussed. Keywords: cement paste, induction period, calcium concentration, nucleation rate, time lag. Keywords: ca2; cement; concentration; ions; nucleation; paste; portlandite

• Velikhov Electrothermal Instability Cancellation by a Modification of Electrical Conductivity Value in a Streamer by Magnetic Confinement by Petit, Jean P.; Dore, Jean C. (2013) - Theoretical analysis of shock wave anihilation with MHD force field. Shock wave annihilation by MHD action in supersonic flow. Keywords: instability; international; mhd; petit; shock; value; velikhov
• SPECIFIC EMISSIONS FROM BIOMASS COMBUSTION by Skopec, Pavel; Hrdlička, Jan; Kaválek, Michal (2014) - Developments in boiler construc- tion leading to better efficiency and lower emissions should have been reflected in lower specific emissions in the EEA data, which was gathered six years later than the CHMI data. Keywords: specific emissions, biomass combustion, small-scale boilers. Keywords: boiler; combustion; emissions; fuel; pellets; value; wood
• Class Representation of Shapes Using Qualitative-codes by Ismail, Ashraf Fouad Hafez (2001) - The Q-code (�) � � � �� �� �� � � � ��i iA, L, K, C , , ,0 The Q-code “�” forms the base symbol in the encod- ing formalism. The second A-code (Axx-code) set QA2: � �Q A A A A A A A AA nil2 0 0 0� � � � � � � � � � �, , , , , , , . Keywords: code; k0 �; landmark; nodes; qualitative; set; shape; value; x �; � c; � fig; � k; � l; � q; � y; � �
• AN ANALYSIS OF SPATIAL STRUCTURE OF URBAN REGIONAL NETWORKS USING GIS by Kostin, Vitalii; Halounová, Lena (2019) - Road network is the foundation of the urbanization process. Taking advantage of modern GIS technologies, we investigate the geometric and topological characteristics of road networks on detailed spatial data. Keywords: average; degree; length; network; nodes; region; roads; value
• Company Value, Real Options and Financial Leverage by Drahovzal, O. (2006) - The value of volatility � can be determined directly from the company’s stock his- tory, or can be specified by the following formula: � � � � � �� � � � � � � � � � �( ) ( )1 2 12 2 2 0 2 0P P P PD A D D D A , (8) where �A, �0 are the standard deviations of the prices of shares and obligations, � is the correlation coefficient between them, and PD is the ratio of debt to total capital. The Black – Scholes formula for the call option is: C S N d X e N drt� � � � ��( ) ( )1 2 , (4) d S X r t t1 2 2 � � � � � � � � � � � � � � ln � � , (5) d Keywords: company; debt; ratio; value; � �

• Sharply Orthocomplete Effect Algebras by Kalina, M.; Paseka, J.; Riečanová, Z. (2010) - Lattice effect algebras are in some sense a nearest common generalization of orthomodular lattices [16] Mosná, K.: Atomic lattice effect algebras and their sub-lattice effect algebras, J. Electrical Keywords: algebra; effect; lattice; s(e
• Two Remarks to Bifullness of Centers of Archimedean Atomic Lattice Effect Algebras by Kalina, M. (2011) - and we are able to extend this state to the whole lattice effect algebra E. In [8] an atomic lattice effect algebra E (in fact, an atomic orthomodular lattice) with atomic center C(E) was constructed, where C(E) is not a bifull sublattice of E. In this paper we show that for atomic lattice effect algebras E (atomic orthomodular lattices) neither completeness (and atomicity) of C(E) nor σ-completeness of E are sufficient conditions for C(E) to be a bifull sublattice of E. Keywords: lattice effect algebra, orthomodular lattice, center, atom, bifullness. There are lattice effect algebras with no state. Keywords: effect; lattice
• Extensions of Effect Algebra Operations by Riečanová, Z.; Zajac, M. (2011) - Our main goal is to study the prop- erties of sub-generalized effect algebras and effect al- gebras being intervals in V(H) if V(H) is equipped with two different partial sums such that one of them is an extension of the other. Keywords: generalized effect algebra, effect algebra, Hilbert space, densely defined linear operators, extension of operations. Keywords: effect
• Effect Algebras of Positive Self-adjoint Operators Densely Defined on Hilbert Spaces by Riečanová, Z. (2011) - No. 4/2011 of operators A, B at least one is bounded and then A ⊕ B = A + B is the usual sum of operators in H. Then (F(H);⊕, 0) is a generalized effect algebra. 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. Keywords: effect
• Inherited Properties of Effect Algebras Preserved by Isomorphisms by Paseka, Jan; Riečanová, Zdenka (2013) - [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: effect algebras; operator effect algebras; isomorphisms; operator representations of effect algebras.. Keywords: algebras; effect
• Intervals in Generalized Effect Algebras and their Sub-generalized Effect Algebras by Riečanová, Zdenka; Zajac, Michal (2013) - [10] Polakovič, M.: Generalized effect algebras of bounded positive operators defined on Hilbert spaces, Reports on Mathematical Physics, 68 (2011), 241–250. Recall that if (E;⊕, 0, 1) is an effect algebra ((E;⊕, 0) is a generalized effect algebra) then a subset G 6= ∅ such that 1 ∈ G (0 ∈ G respectively) is a sub-effect algebra (sub-generalized effect algebra) of E iff 314 http://ctn.cvut.cz/ap/ vol. Keywords: algebra; effect
• MAXIMAL SUBSETS OF PAIRWISE SUMMABLE ELEMENTS IN GENERALIZED EFFECT ALGEBRAS by Riečanová, Zdenka; Janda, Jiří (2013) - Further, let us investigate inter- vals in pairwise summable generalized effect algebras. In 1994, D. Foulis introduced al- gebraic structures called effect algebras. Keywords: algebra; effect; effect algebra; pairwise
• EXPERIMENTAL INVESTIGATION ON CHROMIUM(VI) REMOVAL FROM AQUEOUS SOLUTION USING ACTIVATED CARBON RESORCINOL FORMALDEHYDE XEROGELS by Oyedoh, Eghe A.; Ekwonu, Michael C. (2016) - 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; adsorption; carbon; chemical; chromium; chromium(vi; cr(vi; effect; ions; isotherm; metal
• FABRICATION OF Mg-Zn-Al HYDROTALCITE AND ITS APPLICATION FOR Pb2+ REMOVAL by Heraldy, Eddy; Rahmawati, Fitria; Ardiyanti, Dwi; Nurmawanti, Ika (2019) - Catalysis Today 158:459–463, 2010. doi:10.1016/j.cattod.2010.07.013. 271 http://dx.doi.org/10.1016/j.cattod.2009.08.020 http://dx.doi.org/10.1016/j.jece.2015.09.015 http://dx.doi.org/10.22146/ijc.21190 http://dx.doi.org/10.1016/j.foodchem.2014.03.098 http://dx.doi.org/10.1016/j.molliq.2015.07.044 http://dx.doi.org/10.1016/j.jaap.2016.06.018 http://dx.doi.org/10.1016/j.cattod.2010.07.013 Acta Polytechnica 59(3):260–271, 2019 1 Introduction 2 Material and methods 2.1 Materials 2.2 Procedure 2.2.1 Fabrication of Mg-Zn-Al HT adsorbents 2.2.2 Batch adsorption experiments design 3 Results and discussion 3.1 Characterization of Mg-Zn-Al HT 3.1.1 XRD analysis 3.1.2 FTIR analysis 3.1.3 Mg-Zn-Al HT optimization 3.1.4 Characterization of metal oxide formation from Mg-Zn-Al HT 3.2 Effectiveness test of Mg-Zn-Al HT and its oxide to Pb2+ adsorption 3.3 Adsorption studies of Pb2+ using Mg-Zn-Al HT oxide 3.3.1 Optimum pH determination of Pb(NO3)2 solution 3.3.2 Effect of contact time 3.3.3 Effect of initial concentration 3.3.4 Characterization of Mg-Zn-Al HT oxide adsorbent after Pb2+ adsorption 3.4 Determination of adsorption kinetics 3.5 Determination of adsorption isotherm 4 Conclusion Acknowledgements References The diffractogram of (a) JCPDS Mg-Al HT (b) JCPDS Zn-Al HT (c) JCPDS MgO (d) JCPDS ZnO (e) Mg-Zn-Al HT and (f) Mg-Zn-Al HT oxide. Keywords: adsorbent; adsorption; al ht; effect; ions; oxide; pb2; solution
• Modelling of Size Effect with Regularised Continua by Askes, H.; Simone, A.; Sluys, L. J. (2004) - 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. The local equivalent strain �eq defined in Equation (2) is translated into its nonlocal counterpart �eq via a Helmholtz-type relation as � � �eq eq eq� � � 1 2 2 2l , (3) where l is a material length parameter that represents the underlying microstructure. Keywords: beams; damage; effect; notch; size; vol; � �
• PILE SETTLEMENT INDUCED FROM SOIL MOVEMENT DUE TO BREAKDOWN OF RETAINING WALL by Shukla, Rajesh Prasad (2020) - Pile group settlement reduces with the increase in spacing and the number of piles in longer piles. It leads to an increase in the magnitude of piles settlement. Keywords: effect; embedment; group; height; increase; movement; piles; retaining; settlement; soil; spacing; wall

• A Wideband Low-Pass Filter for Differential Mode Distortion by Brejcha, M. (2011) - Keywords: filter, filtering, low-pass, wideband, EMC, differential mode. Passive, Active and Digi- tal Filters. Keywords: filter; frequency; section
• Macro-instabilities of a Suspension in an Axially Agitated Mixing Tank by Jahoda, M.; Machoň, V.; Vlach, L.; Fořt, I. (2002) - 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: frequency; impeller; macro; occurrence; vessel
• Frequency and Magnitude Analysis of the Macro-instability Related Component of the Tangential Force Affecting Radial Baffles in a Stirred Vessel by Hasal, P.; Kratěna, J.; Fořt, I. (2002) - The N-window extracts N consecutive elements from the series {�i *} to vector {�k *} � � � �k j S * *, , , , , ,� � � � � �� j k k N k N N� �1 1 1 (3) The set of vectors {�k *, k � 1, …, m �(N�1)} resulting from repeated application of the N-window to the centred velocity data is then rearranged to a form of the so called trajectory matrix W � � �W= � � �1 2 N N T S * * *, , ,� � �1 . The frequency of occurrence of macro-instability related force component is also analysed. Keywords: blade; force; frequency; impeller; macro; vessel; � �
• The Effect of Pedestrian Traffic on the Dynamic Behavior of Footbridges by Studničková, M. (2004) - The load model of a continuous stream of pedestrians can be expressed in the form: for vertical vibrations � � � �q k f f tsv v v v�12 6 2. sin � [Nm�2] (4) for horizontal vibrations � � � �q k f f tsh h h h�12 6 2. sin � [Nm�2] (5) where all symbols are as already defined. due to a single person can be ex- pressed with sufficient accuracy as the sum of the static force (the weight of a person) and the first three harmonic compo- nents of the excitation force [3] � � � � � � F t G G 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) Keywords: fig; footbridge; frequency; vertical; vibrations; � �

• OPTIMIZATION METHOD AND SOFTWARE FOR FUEL COST REDUCTION IN CASE OF ROAD TRANSPORT ACTIVITY by Kovács, György (2017) - 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 main goal of organizing trans- port routes is to minimize specific transport costs and reduce the transport lead time [10,11,12,13]. Keywords: cost; figure; fuel; fuel cost; petrol; petrol station; software; station; transport
• Financing of Liabilities Beyond the Service Life of Nuclear Installations by Havlíček, L. (2006) - 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: decommissioning; fuel; liabilities; liability; operator; plant; waste; � �
• Nuclear Fuel Cycle Evaluation and Real Options by Havlíček, L. (2008) - 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 first part is usually called the “Front-End”, and in- cludes all activities connected with procurement of nuclear material and services, production of nuclear fuel and its trans- portation to the NPP site. Keywords: cycle; end; fuel; fuel cycle; option; uranium; � �

• PARTICLE MOTION OVER THE EDGE OF AN INCLINED PLANE THAT PERFORMS AXIAL MOVEMENT IN A VERTICAL LIMITING CYLINDER by Pylypaka, Serhii F.; Klendii, Mykola B.; Nesvidomin, Viktor M.; Trokhaniak, Viktor I. (2019) - 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: figure; motion; particle; particle motion; plane; velocity
• A comparative study of ferrofluid lubrication on double-layer porous squeeze curved annular plates with slip velocity by Patel, Niru C.; Patel, Jimit R.; Deheri, Gunamani M. (2022) - Magnetic fluid based squeeze film between porous annular curved plates with the effect of rotational inertia. Couple stress fluid-based squeeze film between porous annular curved plates with the effect of rotational inertia. Keywords: bearing; ferrofluid; film; lbc; lubrication; patel; plates; slip; squeeze; velocity
• Similarity Solutions of Jet Development Mixing Layers Using Algebraic and 1-Equation Turbulence Models by Tesař, V. (2006) - On the negative �ALG side there is a minimum u = 0 at �ALG � �1.846694. On the other side, the value u � 0.2 at point B is reached at �ALG � �0.8160231. Keywords: d d; f �; fig; g �; layer; solution; thickness �; turbulence; u �; velocity; � alg; � d; � t; � w; � �
• Interstellar gas motions around massive star formation regions in the nearby dwarf galaxy DDO43 by Pichler, Enikő; Koncz, Bendegúz; Gabányi, Krisztina É.; Joó, András Péter; Tóth, L. Viktor (2025) - HI line areas in the velocity intervals 314–334 km s−1 and 374–394 km s−1 against FUV flux. The processing of HI spectra 2.2 Far-ultraviolet data 3 Results 3.1 The distribution of residual spectral line areas 3.2 Comparison to far-ultraviolet data 4 Discussion 5 Conclusion Acknowledgements References Keywords: ddo; figure; formation; galaxy; line; spectra; star; velocity

• Numerically Optimized Uniformly Most Powerful Alphabets for Hierarchical-Decode-and-Forward Two-Way Relaying by Hekrdla, M. (2011) - [9] ||sk − sm||2 + |α|2||sl − sn||2− (4) 2|α| |〈sk − sm, sl − sn〉| ≥ |α|2δ2min, for k �= m, l �= n, k ⊕ l �= m ⊕ n and ∀α ∈ C, |α| ≤ 1. 3 Design of UMP Alphabets In contrast to [9], where UMP 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. In contrast to Rayleigh fading, it is prefer- able to use UMP alphabets even at the price of lower δ2min in the Rician fading channel (here the Rician factor K = 10dB). Keywords: alphabets; channel; network; optimization; ump; wireless
• Integration of the Watcher Telescope into the Sierra Stars Observatory Network – Lessons Learned for GLORIA by Topinka, Martin; Hanlon, Lorraine; Meehan, Seamus (2013) - Keywords: robotic telescope, gamma-ray burst afterglows, GLORIA, SSON. 2. GLORIA project GLORIA stands for “GLObal Robotic-telescopes In- telligent Array” and will be the first free and open access network of robotic telescopes in the world [4]. Keywords: gloria; grb; network; sson; telescope; watcher
• Generic Platform for Failure Recovery in Survivable Trees by Dynda, V. (2005) - 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 ��. 3: Relation between nodes n AT ( )�� and faulty cluster �� �� n j n j�1 n j�k n i�1 n j�2 n i R �(ni , nj ) BC(��) BR T (n j , 2) BR T (n j , 3) BR T (n, k�1) (a) (b) ��n 8 n 9 n 10 n 1 n 2 n 3 n 4 n 5 n 6 n 7 (n 8 ,2) (n 8,3) (n 9 ,4 ) (n 10 ,2) (n 10 ,2 ) (n 1 0 ,3 ) (n 9 ,2 ) (n 9 ,2) (n 9 ,3) (n 8 ,2 ) (n8 ,2) Fig. 4: Routing from n Ai T ( )�� to ni�1 (a) and routing around ��� � n n n8 9 10, , (b) 7 Leader link election The task of the leader link election algorithm is to identify a leader – a single edge on the bypass cycle that will not partic- ipate in fragment reconnection in order to ensure correctness of the restored tree while keeping it connected. Keywords: bypass; failure; fragments; multicast; network; nodes; recovery; scheme; tree; � �
• Fake face detection based on a multi discriminator deep CNN architecture (MDD-CNN) by Bencheriet, Chemesse Ennehar; Abdelmoumène, Hiba; Sebbagh, Abdennour; Yahiyaoui, Abdennour; Taba, Zahra (2023) - Fake face images. Real face images. Keywords: architecture; cnn; dataset; deep; deepfake; detection; discriminator; faces; figure; generator; images; learning; network; training; videos

• Stellar Image Interpretation System using Artificial Neural Networks: Unipolar Function Case by Younis, F. I.; Alawy, A. El-Bassuny; Šimák, B.; Ella, M. S.; Madkour, M. A. (2001) - The momentum term was adopted to be 0.5 in order to accelerate the convergence of the error back-propagation learning algorithm of our SIIS-ANN. 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: images; input; output; pattern; pixel; values
• NEURINGER-ROSEINWEIG MODEL BASED LONGITUDINALLY ROUGH POROUS CIRCULAR STEPPED PLATES IN THE EXISTENCE OF COUPLE STRESS by Vashi, Yoginibahen Devendrasinh; Patel, Rakesh Manilal; Deheri, Gunamani Biswanath (2020) - Squeeze film characteristics of finite journal bearings: couple stress fluid model. Furthermore, this improvement in load bearing capacity is almost 58% higher when 264 vol. Keywords: bearing; h∗ =; values; −0.025
• Study of surface roughness with MHD and couple stress fluid on porous curved annular plates by Alla Baksh, Salma; Bannihalli Naganagowda, Hanumagowda (2022) - Magnetic fluid based squeeze film in rough rotating curved porous annular plates: Deformation effect. The expressions for squeeze film pressure, load-carrying capacity, and squeeze film time are obtained analytically, the results are discussed for various values of operating parameters, and are plotted graphically. Keywords: figure; film; fluid; roughness; squeeze; values

• STATIC TESTS OF UNCONVENTIONAL PROPULSION UNITS FOR ULTRALIGHT AIRPLANES by Helmich, Martin (2014) - Dimensionless thrust at various engine speeds, depending on the diameter of the exit nozzle. We performed experiments to verify the propulsion functionality and a measurement procedure to determine the available thrust of the propulsion unit and its dependence on engine speed. Keywords: channel; engine; nozzle; outlet; propulsion; speed; thrust; unit
• Reduction of torque pulsation in ultralight helicopter transmission by Dudnik, Vitaly (2024) - Keywords: Ultralight helicopter, piston engine, torque pulsation. Torque pulsation on the engine shaft The traditional methods of reducing engine torque variance are to increase the number of cylinders and ensure that the spark ignition in the cylinder alter- nates evenly. Keywords: engine; helicopter; pulsation; rotor; shaft; torque

• First Steps into Practical Engineering for Freshman Students Using MATLAB and LEGO Mindstorms Robots by Behrens, A.; Atorf, L.; Schwann, R.; Ballé, J.; Herold, T.; Telle, A. (2008) - 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]. 1. 44 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 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: engineering; fig; learning; lego; matlab; mindstorms; nxt; project; robot; students; toolbox
• Reduction of pavement thickness using a subgrade layer treated by different techniques by Zehawi, Raquim N.; Kareem, Yassir A.; Khudhair, Emad Y. (2022) - 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. Introduction There are several highway pavement distresses, some of which can be attributed to subgrade soils’ inade- quate support. Keywords: ash; cbr; engineering; fly; layer; pavement; reduction; soil; stabilisation; subgrade; thickness

• Pitched Blade Turbine Efficiency at Particle Suspension by Ceres, D.; Jirout, T.; Rieger, F. (2010) - 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: particle; rieger; suspension
• INTELLIGENT CONTROLLER FOR TRACKING A 14-INCH CELESTRON TELESCOPE by Attia, Abdel-Fattah A. (2018) - “Modified PSO for optimal tuning of fuzzy PID controller.” [7] Abdo MM, Vali AR, Toloei AR, Arvan MR. Stabilization loop of a two axes gimbal system using self-tuning PID type fuzzy controller. Keywords: controllers; dec; figure; flc; particle; pid; pso; telescope
• Multi-Particle Universal Processes by Novotný, J.; Štefaňák, M.; Košt’ák, V. (2005) - The mapping on the density operators � �out inT T� � , where � is normalizing factor �out to be a density matrix, ful- fills the covariant condition if the following equality is satis- fied for all one-particle unitary transformations U and for all one-particle pure input states p p : †p p p p� � � 0 (3) where the one-particle unitary transformation U(p) maps the state p0 to the state p , i. e. p p p� U( ) 0 . Keywords: particle; processes; � �

• Simulation of Hyperthermic Treatment Using the Matrix of Stripline Applicators by Vrbová, B.; Víšek, L. (2010) - 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: applicators; distribution; fig; sar; tissue
• A Note on Normalised Distributions of DC Partial Microdischarges by Ficker, T.; Macur, J. (2003) - => 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). In other words, the normalisation procedure can­ not change the results of physical processes and this fact also supports the employment of unnormalised distributions in statistical studies realised in physics and other fields ofscience and technology. Keywords: distribution; interval; normalisation; pareto
• NEW SPECTRAL STATISTICS FOR ENSEMBLES OF 2 × 2 REAL SYMMETRIC RANDOM MATRICES by Kumar, Sachin; Ahmed, Zafar (2017) - Maxwellian Distribution: f(x) = xe−x2, x > 0 For R1 type of real symmetric matrix P (S) is not simple, however here we would like to show that when the PDF does not peak at x = 0, we get highly non-linear behaviour of P (S) near S = 0 Keywords: real symmetric matrices; Wigner surmise. Keywords: distribution; matrices

• Limited Angle Torque Motors Having High Torque Density, Used in Accurate Drive Systems by Obreja, R.; Edu, I. R. (2011) - Keywords: limited angle torque motor, finite element method, high performance, pancake, direct drive. A limited angle torque motor with a large air-gap In the situation of torque motors with a large air-gap, it is found that the magnetic field generates only the 4 main poles very accurately, because the field lines may not close in the neutral area of the poles directly between the magnets and the soft magnetic material of the rotor, due the dimensions of the air-gap. Keywords: density; diagram; fig; flux
• Structural Variability of 3C 111 on Parsec Scales by 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. (2012) - 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: component; density; flux; outburst; radio
• Influence of the Amount of Master Alloy on the Properties of Austenitic Stainless Steel AISI 316L Powder Sintered in Hydrogen by Skaloń, Mateusz; Kazior, Jan (2012) - 3.3 Microhardness Figure 3 presents the results of microhardness mea- surements of sintered AISI 316L powders. sintered AISI 316L base powder and b) AISI 316L modified with 0.4 wt. % of boron in MasterAlloy form Figure 7: Surface microstructure of a) sintered AISI 316L base powder and b) Keywords: 316l; aisi; boron; density
• A Study of the Properties of Electrical Insulation Oils and of the Components of Natural Oils by Spohner, Milan (2012) - 5 shows the density in dependence on the inverse temperature interval from 270 to 350K. The lowest values were for mineral oils and methyl ester rapeseed oil. 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: density; dielectric; methyl; oil; oils; rapeseed
• CELL-CENTERED LAGRANGIAN LAX-WENDROFF HLL HYBRID SCHEME ON UNSTRUCTURED MESHES by Fridrich, David; Liska, Richard; Tarant, Ivan; Váchal, Pavel; Wendroff, Burton (2021) - Convergence of scatter plots of density for Noh problem on regular triangular mesh with τ = 2. Figure 10. Density and mesh for Sedov problem on regular triangular mesh of 10108 cells with τ = 2. plementation, all of the initial energy is stored is one regular hexahedral cell centered at (0, 0) in the case of the honeycomb and general polygonal meshes. Keywords: cell; density; figure; mesh; meshes; noh; problem; triangular

• Disinfection performance of an ultraviolet lamp: a CFD investigation by Bui, Cuong Mai; Phan, Nguyen Duy Minh; Tran, Ngo Quoc Huy; Doan, Le Anh; Vo, Quang Truong; Tran, Duy Chung; Nguyen, Thi Thanh Vi; Nguyen, Duc Long; Huynh, Van Sanh; Ho, Tran Anh Ngoc (2022) - UV intensity distribution along the char- acteristic line. [W] I UV intensity [W/m2] I0 Initial UV intensity Keywords: bactericidal; disinfection; figure; intensity; lamp; rate; virus
• Central Decoding for Multiple Description Codes based on Domain Partitioning by Spiertz, M.; Rusert, T. (2006) - 2: Domain based MDC, qi � quantization error correspond- ing to a quantization interval �i 2.2 Reconstruction by linear superposition 5 shows that in the case of � �2 1 2 1� � � �k n k n, , � the linear superposition method gets worse than the highest rate method. Keywords: decoder; fig; quantization; rate; � �

• Technical Teachers and Technical Teacher Education - Research Results by Dobrovská, D.; Andres, P. (2002) - 6 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 42 No. 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. Answer Frequency 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? Keywords: education; respondents; teacher; technical

• Measurement of O2 in the Combustion Chamber of Apulverized Coal Boiler by Janeba, Břetislav; Kolovratník, Michal; Bartoš, Ondřej (2012) - 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: analyzer; combustion; extraction; sensor

• Prague Loretto - Measurements of Moisture Content in Sculptural Group Material by Římal, J. (2002) - Only complete elimi- nation of excessive moisture sources can guarantee the success of any preservation or conservation interventions that will be needed on the sculptural group. Keywords: Prague Loretto, measurement of moisture fields, mass transport. Keywords: group; moisture; sandstone
• The effects of potassium permanganate on the geotechnical properties of soils by Ola, Samuel Akinlabi; Usifoh, Osemudiamen Ayoposi; Nnochiri, Emeka Segun (2023) - Keywords: Atterberg limits, California bearing ratio, kaolinitic soil, lateritic soil, potassium perman- ganate. [21], reported a reduction in bulk den- sity (which is related to specific gravity) in the analysis of potassium permanganate reactive soils. Keywords: content; effects; increases; kmno4; limit; moisture; percentage; permanganate; potassium; potassium permanganate; soil

• Fuzzy Optimisation of Structural Performance by Holický, M. (2005) - It is assumed that the objective function is given by the total cost C(� ) expressed approximately as a sum C C CD( ) ( ) ( )� � � �� �0 , (3) where C0(� ) is given as the sum of the construction and maintenance cost, �(�)CD is the expected malfunction cost; here CD denotes the cost of full damage (full malfunction or serviceability failure) and � denotes the decision parameter (for example the mass per unit length or the cross section area). Note that for the standard deviation �S � 0.2 r1 the op- timum mean �S is in both cases considerably lower (from 0.8 r1 to 0.95 r1). Keywords: cost; fig; performance; probability; � r; � �
• Temporal fusion strategy for violence detection: utilising convolutional and LSTM neural networks for surveillance videos by Merit, Khaled; Beladgham, Mohammed; Taleb-Ahmed, Abdelmalik (2025) - The slow fusion and early fusion approaches require the selection of video frames to accurately represent the subject. This process can be found in [8], which uses convolutional networks and LSTM to classify violent videos. Keywords: accuracy; dataset; detection; figure; frames; fusion; learning; models; networks; performance; scenes; task; video; violence

• Study of Wear of Pitched Blade Impellers in a Solid-Liquid Suspension by Fořt, I.; Kreibich, V.; Marek, J. (2003) - 3 Results and discussion Four series of experiments were evaluated: an investiga- tion of pitched blade impellers with pitch angle cr' = 30 for both the larger and the smaller pilot plant systems and also pitched blade impellers with pitch angle a=45, again, for the larger and smaller pilot plant systems' During the erosion process of the pitched blade impeller caused by solid particles of silicious sand, its metal plane blades change shape mainly around the leading edge Marek A study was made oftke erosion wear ofthe blades ofpitched blade impellers in a suspension ofsilicious sand (Cv= 5 %, d Keywords: angle; blade; erosion; impeller; parameter; wear
• KINEMATIC SYNTHESIS OF CENTRAL-LEVER STEERING MECHANISM FOR FOUR WHEEL VEHICLES by Pramanik, Santiranjan; Thipse, Sukrut Shrikant (2020) - Introduction There are several types of steering mechanisms used for four-wheel vehicles. Optimal synthesis of steering mechanism including transmission angles. Keywords: angle; bar; figure; mechanism; steering; wheel

• Metallurgical Joining of Magnesium Alloys by the FSW Process by Kupec, Tomáš; Hlavačová, Ivana; Turňa, Milan (2012) - 3 Conclusions This paper has presented a brief survey of the met- allurgy of welding Mg alloys using the FSW process. Figure 4: Microstructure of base metal (AZ31alloy), etch. Keywords: base; figure; metal; welding

• Dynamic Effect of Discharge Flow of a Rushton Turbine Impeller on a Radial Baffle by Kratěna, J.; Fořt, I.; Brůha, O. (2001) - If we consider the total number of baffles nb, the moment transferred by the baffles is M F R nb av b b� � � , (28) and finally in dimensionless form M F R n N D n F R Db av b b b av b* * *� � � � � � � � � 3 5 . (29) Similarly the portion of the reaction moment of the baffles corresponding to the mutual interference of nb baffles and the impeller discharge stream can be expressed in dimen- sionless form as M n F R Db d b d av b , * , *� � � , (30) where the quantity Fd av, * was calculated according to Eq. Keywords: baffles; discharge; impeller; radial; � �
• Study of Pumping Capacity of Pitched Blade Impellers by Fořt, I.; Jirout, T.; Sperling, R.; Jambere, S.; Rieger, F. (2002) - , H T � 055 10. ; . , � � � �15 60; , 4 baffles b T �01. , Re .M � �10 104. 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. Keywords: blade; impeller; pumping; � �
• Pumping Capacity of Pitched Blade Impellers in a Tall Vessel with a Draught Tube by Brož, J.; Fořt, I.; Sperling, R.; Jambere, S.; Heiser, M.; Rieger, F. (2004) - The PBT pumping capacity will be calculated from the radial profile of the axial compo- 48 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 44 No. 4/2004 Pumping Capacity of Pitched Blade Impellers in a Tall Vessel with a Draught Tube J. Brož, I. Fořt, R. Sperling, S. Jambere, M. Heiser, F. Rieger A study was made of the pumping capacity of pitched blade impellers (two, three, four, five and six blade pitched blade impellers with pitch angles � � 35° and 45°) coaxially located in a cylindrical pilot plant vessel with cylindrical draught tube provided with a standard dished bottom. For all the tested pitched blade impellers the impeller power number when � � 45° exceeds the value of this quantity when pitch angle � � 35°, while the flow rate number when � � 35° exceeds this quantity when � � 45°. Keywords: draught; draught tube; impeller; number; tube; � �

• PROTECTION OF WOODEN MATERIALS AGAINST BIOLOGICAL ATTACK BY USING NANOTECHNOLOGY by Havrlik, Michal; Ryparová, Pavla (2015) - 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: agar; fungicidal; growth; nanofiber; polymer; pva; solution; textiles
• Utilization of agricultural waste adsorbent for the removal of lead ions from aqueous solutions by Yusuff, Adeyinka Sikiru; Popoola, Lekan Taofeek; Anochie, Victor (2021) - SEM micrographs of CMOSW sample (a) prior to and (b) after Pb2+ ions adsorption. Adsorption removal of lead and arsenic from aqueous solution using soya bean as a novel biosorbent: equilibrium isotherm and thermal stability studies. Keywords: adsorbent; adsorption; cmosw; equilibrium; ions; lead; order; pb2; removal; solution; waste
• Comparision of the walk techniques for fitness state space analysis in vehicle routing problem by Agárdi, Anita; Kovács, László; Bányai, Tamás (2021) - The Timetabling Problem landscape is determined by the following techniques: fitness distance correla- tion, autocorrelation The relationship between fitness values and average of fitness distances to other solutions in the case of 2-opt operator Figure 9. Keywords: average; crossover; fitness; fitness distances; fitness values; hamming; hamming distances; problem; sequence distances; solution; swap sequence; walk

• A COMPARISON OF METHODS USING STRAIN GAUGES TO MONITOR PHYSIOLOGICAL MOVEMENTS ON A HOSPITAL BED by Socha, Vladimír; Kutílek, Patrik; Smrčka, Pavel; Socha, Luboš (2014) - This paper presents a comparison of two types of strain gauge sensor configurations in order to decide which methods may be most appropriate for use in clinical practice. Table 1 shows the calculation of the stress or strain (due to the bending or twisting moment) from the measured change in the output voltage of strain gauges ∆Uo or the measured change in strain εm of the full bridge or half bridge strain gauge circuit. Keywords: bed; bending; change; deformation; movements; sensors; strain
• ANALYSIS OF THE ACCURACY OF FIBRE-OPTIC STRAIN GAUGES by Jiroutová, Dita; Vokáč, Miroslav (2013) - 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: fibre; length; optic; sofo; strain

• Valve Concepts for Microfluidic Cell Handling by Grabowski, M.; Buchenauer, A. (2010) - To avoid the disadvantages of valve type 2, which are explained in detail in the results, we designed a subtype of this geometry. Figures 12, 13 and 14 show the simulation results for valve type 2. Keywords: cell; channel; fig; layer; microfluidic; type; valve
• ASTRONOMICAL GLASS PLATE NEGATIVES: MONITORING OF EMULSION LAYER DETERIORATION by Miskova, L.; Novák, P.; Hudec, R.; Novotná, M. (2016) - The main period when glass plate negatives were used in astronomy was between 1890–1980. 5. Conclusions We examined a set of glass plate negatives using chemico-analytical tools such as FTIR spectroscopy and SEM/EDS. Keywords: emulsion; emulsion layer; glass; golden; layer; negatives; plate; spot

• Composite Axial Flow Propulsor for Small Aircraft by Poul, R.; Hanus, D. (2005) - The air deflection is then: � � �� 1 2 The proper blade/vane density is chosen according to Fig. 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. Keywords: blade; composite; fan; fig; rotor; � �

• A SIMPLE DERIVATION OF FINITE-TEMPERATURE CFT CORRELATORS FROM THE BTZ BLACK HOLE by Ohya, Satoshi (2014) - = ∆ 2 −1−ikR −∆ 2 −ikR G∆(kL, kR − i) gives GR∆(kL, kR) Let us first focus on the case where the point (τ, θ) on the AdS3 boundary (∂AdS3) lies inside the future light-cone xL = τ + θ > 0 and xR = τ − θ > 0. Keywords: ads3; hole; point; so(1; so(2
• FUNCTIONAL REALIZATIONS OF LIE ALGEBRAS AS NOETHER POINT SYMMETRIES OF SYSTEMS by Campoamor-Stursberg, Rutwig (2017) - 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: algebra; lie; noether; point; symmetries; symmetry; systems
• Fixed-Point Arithmetic in FPGA by Bečvář, M.; Štukjunger, P. (2005) - 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: area; arithmetic; carry; mode; multipliers; point

• MEASUREMENTS ON THE VT 400 AIR TURBINE by Klimko, Marek; Okresa, Daniel (2016) - Stationary blade Stationary blade Stationary blade Moving bladevariant 1 (2010) variant 2 (2011) variant 3 (2012) Experimental and numerical development of turbine blades of high efficiency. Keywords: blades; blading; efficiency; int; reaction; stage; stationary; turbine
• Optimization of Flapping Airfoils for Maximum Thrust and Propulsive Efficiency by Tuncer, I. H.; Kay, M. (2004) - In this work an approximation is made [13], and the step size is evaluated as follows: � � � � � �� O O D where � � � � � � �� � � O O O e n n n � � � � � D v v 1 1 . � ���O �D is then evaluated numerically. Keywords: airfoil; efficiency; fig; flapping; optimization; plunge; thrust; � �
• Indirect Determination of the Risk of Transportation Projects by Pastor, O. (2007) - The basic blocks for assessing transportation projects can comprise: Direct demand of users: This paragraph analyses the benefit of the implemented project for the user. No. 1/2007 Indirect Determination of the Risk of Transportation Projects O. Pastor This paper deals with indirect determination of the risk of transportation projects. Keywords: development; efficiency; locality; project
• Valuating the Investment Efficiency of Distribution Companies by Karajica, M. (2007) - uj are weights assigned to j-th output, while i r�1, ,� , j s�1, ,� and k k n�1 0, , , ,� � . � Multi Criteria Decision Making methods, � Data Analysis Envelopment. Keywords: companies; criteria; efficiency; investment; methods; � �

• Rock Burst Mechanics: Insight from Physical and Mathematical Modelling by Vacek, J.; Vacek, J.; Chocholoušová, J. (2008) - We observed the mechanism and the history of coal rock bursts. 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. Keywords: bump; burst; coal; force; photo; rock
• Self Heating of an Atomic Force Microscope by Kučera, O. (2010) - 4: An example of pure contact noise superimposed on the drift of PSPD voltage. Although, tools that protect AFM against external noise have been developed and are widely used, there are still many sources of inherent noise. Keywords: afm; force; noise
• A Model of Active Roll Vehicle Suspension by Čech, I. (2010) - From the inertia of the axle 0 = 2s2mw2(y 2 w/4 + tn · z2tw + tn · r2wx)· 2/yw · Zw2 from the unevennesses +ywkw2(Zw2 − Zk2) from the suspension −ycSbw2 from the lateral forces in the joint Sqb, Sqs +zqxw1/xw · (Sqb + Sqs) from the lateral motion of the axle −2tn · mw2(ztw − zq)(Ac − s2 · Yky2) from the weight of the displaced mass centre −2tn · mw2ztw · 2agZw2/yw from the weight of the body and seat to the displaced axle + 8(mb +ms)agzqZw2/yw · xw1/xw (3.8) Equation of lateral forces Lateral forces between the wheels and the road 0 = −2ky1Yky1 − 2ky2Yky2 inertia forces of the body and seat +Sqb + Sqs from solid axle roll +s2 · mw2 · ztw · 2/yw · (tn · Zw2 + nz · Zb) 18 Acta Polytechnica Vol. 50 − 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 . Keywords: axle; body; force; lateral; rear; roll; seat; suspension; vertical
• Stress Distribution in a Coal Seam before and after Bump Initiation by Vacek, J. (2001) - 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: bump; fig; force; tum

• Structural Analysis of Steel Structures under Fire Loading by Crosti, C. (2009) - 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: fig; fire; scenario; structure
• Growth and Physical Structure of Amorphous Boron Carbide Deposited by Magnetron Sputtering on a Silicon Substrate with a Titanium Interlayer by Caniello, Roberto; Vassallo, Espedito; Cremona, Anna; Grosso, Giovanni; Dellasega, David; Canetti, Maurizio; Miorin, Enrico (2013) - Anodization of Ti thin film deposited on ITO. Langmuir 25(1):509–514, 2009. Filament activated chemical vapor deposition of boron carbide coatings. Keywords: boron; carbide; coatings; films; structure; substrate

• A NEW FASTENER TO ENSURE THE RELIABILITY OF A PASSENGER CAR BODY ON A TRAIN FERRY by Lovska, Alyona; Fomin, Oleksij (2020) - The conducted research may contribute to ensuring the required strength of passenger car bodies during train ferry transportation, thus leading to a higher operational efficiency of train ferry transportation within the international transportation. Recently, train ferries have been equipped with special fastening brackets for passenger car bodies (Figure 3). Keywords: body; car; car body; cars; ferry; figure; passenger; passenger car; train; transportation

• Modifing the Surface Layers of Mechanical Components by Slanec, K.; Černý, F.; Gurovič, J.; Chmelík, V. (2003) - Howeve6 because of the repair message routing mechanism 'switching' between bypass rings centered at dif- ferent faulty nodes, bypass rings BR(r) can repair an even larger cluster of faulty nodes under convenient circumstances. Bypass ring of radius r centered at node c CE Set ofcore tree edges cei Core tree edge i E Set of all edges in underlying nenvork S.ly' EMT Extended multicast tree FC Cluster of faulty nodes gcp Greatest common prefix function HID., Hierarchical identifier of node rt related to node c ID, Identifier of node n h Keywords: bypass; core; edges; failure; fault; message; multicast; node; repair; ring; routing; set; tree
• A Bypass-Ring Scheme for a Fault Tolerant Multicast by Dynda, V. (2003) - Howeve6 because of the repair message routing mechanism 'switching' between bypass rings centered at dif- ferent faulty nodes, bypass rings BR(r) can repair an even larger cluster of faulty nodes under convenient circumstances. Bypass ring of radius r centered at node c CE Set ofcore tree edges cei Core tree edge i E Set of all edges in underlying nenvork S.ly' EMT Extended multicast tree FC Cluster of faulty nodes gcp Greatest common prefix function HID., Hierarchical identifier of node rt related to node c ID, Identifier of node n h Keywords: bypass; core; edges; failure; fault; message; multicast; node; repair; ring; routing; set; tree
• Modeling by Petri Nets by Kubátová, H. (2005) - For a net sys- tem S �< NPT, m0> the set RS S m w T m mw( ): ,*� � � �0 , where T* is the sequence of transitions and w � T* and t � T, is the reachability set. � � � � � � �Pre Post0 0� This interpretation leads to the alternative definition, which is closer to the graphical representation. Keywords: fig; net; nets; places; set; transition; � �

• A Porosity Method to Describe Complex 3D-Structures Theory and Application to an Explosion by Robbe, M.-F. (2006) - I � � � �� �� Re 2 3 2 similar to a pressure 3 T f T f t fdiv v I grad v grad v( ) � � � � �� � � � similar to viscous stresses � ��������� ��������� , where kT is the turbulent kinetic energy and T the turbulent viscosity. If we consider a function , defined on the fluid volume �f, it can be separated into a fluid average term and a fluctuating term � (white noise): � � �. Keywords: energy �; eq �; f f; fluid; mass �; structures; vessel; volume �; � d; � f; � mara; � t; � v; � �

• From Gauge Anomalies to Gerbes and Gerbal Representations: Group Cocycles in Quantum Theory by Mickelsson, J. (2010) - Then we investigate how group cohomology of degree 3 comes from a prolongation problem for group extensions and we discuss its role in quantum field theory. In Section 3 we then explain how 3-cocycles come from a prolongation problem for group extensions. Keywords: algebra; cocycle; extension; gauge; group; lie; representation; theory
• Erlangen Programme at Large 3.2 Ladder Operators in Hypercomplex Mechanics by Kisil, V. V. (2011) - Then there is an additional pair of hyperbolic ladder operators, which are identical (up to factors) to (26): L± j No. 4/2011 Table 1: The action of hyperbolic ladder operators on a 2D lattice of eigenspaces. Keywords: group; ladder; mechanics; operators; representation
• THE SHMUSHKEVICH METHOD FOR HIGHER SYMMETRY GROUPS OF INTERACTING PARTICLES by Bodner, Mark; Chadzitaskos, Goce; Patera, Jiří; Tereszkiewitz, Agnieszka (2013) - [6] R. Marshak, E. Sudarshan, Introduction to Elementary Particles Physics, New York, Interscience Publishers, 1961 [7] R. V. Moody, J. Patera, General charge conjugation operators in simple Lie groups, J. Math. It is likely that practical exploitation of Shmushke- vich’s idea for higher groups and possibly representa- tions of much higher dimensions, will not proceed by spelling out the large number of channels for each case and counting the number of occurrences of each state in all the channels. Keywords: group; representations; states
• ON RENORMALIZATION OF POISSON–LIE T-PLURAL SIGMA MODELS by Hlavatý, Ladislav; Navrátil, Josef; Šnobl, Libor (2013) - The role of ambiguities in renormalization group equations of Poisson–Lie sigma models with truncated matrices of parameters is investigated. Two-dimensional Poisson–Lie σ-models are given by Manin triples generated by Abelian or solvable Lie algebras with Lie products Keywords: group; lie; models; poisson; renormalization
• LIE GROUPS AND NUMERICAL SOLUTIONS OF DIFFERENTIAL EQUATIONS: INVARIANT DISCRETIZATION VERSUS DIFFERENTIAL APPROXIMATION by Levi, Decio; Winternitz, Pavel (2013) - 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 Keywords: approximation; difference; differential; equations; group; invariant; order
• EXACT RENORMALIZATION GROUP FOR POINT INTERACTIONS by Turgut, Osman Teoman Turgut Teoman; Eröncel, Cem (2014) - = ∫ R dξ′E0(z0, τ ′, ξ′)E0(z0, τ ′, ξ′) gΛ(τ, τ ′)τ ′ sinh(πτ ′)ϑ(τ, τ ′; ξ) + dΛ gΛ(τ,Λ)Λ sinh(πΛ)ϑ(τ,Λ; ξ) ) , (3.44) and for τ = Λ we obtain( Λ2 + a2) φ̃(Λ, ξ) = 2 π2 (∫ Λ−dΛ 0 dτ ′ gΛ(Λ, τ ′)τ ′ sinh(πτ ′)ϑ(Λ, τ ′; ξ) + dΛ gΛ(Λ,Λ)Λ sinh(πΛ)ϑ(Λ,Λ; ξ) ) . Keywords: group; renormalization
• ON CUBATURE RULES ASSOCIATED TO WEYL GROUP ORBIT FUNCTIONS by Háková, Lenka; Hrivnák, Jiří; Motlochová, Lenka (2016) - Weyl group orbit functions The definition of Weyl group orbit function uses the notion of a sign homomorphisms σt : W 7→ ±1, where Figure 1. Keywords: Weyl group orbit functions; Jacobi polynomials; cubature formulas. Keywords: cubature; formulas; functions; group; integration; jacobi; orbit; polynomials; roots; weyl

• M2-Branes in N = 3 Harmonic Superspace by Ivanov, E. (2010) - It is the conjecture that the IIB superstring on AdS5× S5 is in some sense dual to maximally super- symmetric N = 4, 4D super Yang-Mills (SYM) theory. (3.1) The gauge group acts as automorphisms of this alge- bra, gauge fields being still in the adjoint. Keywords: fields; gauge; hep; shell; superfield; theory
• On the Wess-Zumino Model: a supersymmetric field theory by Kulshreshtha, Daya Shankar; Kulshreshtha, Usha (2022) - The canonical Hamiltonian density of the theory is obtained as: Hc =(∂0A) ΠA + (∂0B) ΠB + (∂0ψα) πα + (∂0ψ̄α) π̄α − LB − LF (41) 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: spinor; supersymmetry; theory; wzm

• Color Portion of Solar Radiation in the Partial Annular Solar Eclipse, October 3rd, 2005, at Helwan, Egypt by Hassan, A. H.; Rahoma, U. A.; Sabry, M.; Fathy, A. M. (2010) - 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. A study of the spectral composition of global solar radiation by interference metallic filters was carried out during the same previous eclipse in August 11th, 1999 in Helwan, Egypt [7]. Keywords: color; diffuse; direct; eclipse; fig; infrared; radiation; variation

• The Simulation of the Influence of Water Remnants on a Hot Rolled Plate after Cooling by Zahradník, Radek (2012) - 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: figure; plate
• Controlling Laminate Plate Elastic Behavior by Mareš, T. (2004) - It is well-known that an actual deformed state minimizes the potential energy � �� u u u u� �a , l( ) ( ) , where a ,( )u u is elastic potential energy � � � �a , Eijkl ij kl( ) ( ) ( ) ( )u u x u x u x� � �� 1 2 � � � �d and l(u) is potential energy of external loads i i t ( )u � �� �d d� � � �� . Keywords: plate; plies; � �
• Non-homogeneity effect on the vibration of the rectangular visco-elastic plate subjected to the linear temperature effect with quadratic thickness variation in both directions by Aggarwal, Sudhanshu (2024) - Vibration of non-homogeneous visco-elastic rectangular plate having linearly varying thickness in both directions with thermal gradient effect. Vibration analysis of visco-elastic rectangular plate with thickness varies linearly in one and parabolically in other direction. Keywords: mode; plate; vibration; β2 =

• Investigation into Airborne Dust ina Wool Textile Mill by Haghi, A. K. (2001) - 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: dust; filter; particles; sampling; size; wool
• STABILITY OF SYNTHESIZED SILVER NANOPARTICLES IN CITRATE AND MIXED GELATIN/CITRATE SOLUTION by Kavuličová, Jana; Mražíková, Anna; Velgosová, Oksana; Ivánová, Dana; Kubovčíková, Martina (2018) - Average values of AgNPs diameter determined by DLS method and from TEM images, PDI and Z-potencial of AgNPs colloids on 7th and 118th day. The attachment of the stabilizer to AgNPs surface is probably related to their interaction strength Keywords: agnps; citrate; day; gelatin; nanoparticles; silver; size; stability; synthesis

• Tendencies in Spatial Planning in Austria by Hladká, K. (2003) - 5 Conclusion The instruments of spatial planning in Austria are deter- mined in the Spatial Planning Acrs of the L.dnder, Thereby a distinction must be made between instruments of supralocal spatial planning, relating to the entire Land or parts of it, and drawn up by the Governments of the Lindit and rhose instrumenrs relating to local spatial planning, which refer to a community and which are drawn up by the local authorities with respect to their area of competence. ln Austria tke national government has no competence in spatial planning, but planning at the nationallevel is undertaken through a joint Jorum which has advisory powers, and in which the national government and the !.Jinder Keywords: development; land; level; planning; plans; regional

• The Diamond Lemma and the PBW Property in Quantum Algebras by Havlíček, M.; Pošta, S. (2010) - − bc)b = −ab2 − bab − acb − cab − bcb = −ab − bab − a(−ab − ba − ac − ca − bc)− cab − b(−ab − ba − ac − ca − bc) = −ab − bab+ a2b+ aba+ a2c+ aca+ abc − cab+ bab+ b2a+ bac+ bca+ b2c = −ab − bab+ ab+ aba+ ac+ aca+ abc − cab+ bab+ ba+ bac+ bca+ bc = aba+ ac+ aca+ abc − cab+ ba+ bac+ bca+ bc. = cb = −ab − ba − ac − ca − bc and (cb)b = (−ab − ba − ac − ca Keywords: algebra; center; relations
• AUTOMORPHISMS OF ALGEBRAS AND ORTHOGONAL POLYNOMIALS by Gromada, Daniel; Pošta, Severin (2014) - [HP−1]jk = (N − 2k)[P−1]kj , construct a recurrence relation j[P−1]k,j−1 − (N − 2k)[P−1]k,j + (N − j)[P−1]k,j+1 = 0 (2) and compare it with general recurrence for Krawt- chouk polynomials, j(p− 1)Kj−1(x)− ( j(p− 1) + N − 1 0 . . Keywords: algebra; polynomials
• LAPLACE EQUATIONS, CONFORMAL SUPERINTEGRABILITY AND BÔCHER CONTRACTIONS by Kalnins, Ernest G.; Miller, Jr, Willard; Subag, Eyal (2016) - Atomic Nuclei, 70, 560-566, (2007), doi:10.1088/0305-4470/34/22/311 [15] Kalnins E. G. and Miller W. Jr., Quadratic algebra contractions and 2nd order superintegrable systems, Anal. Summary of Bôcher contractions of Laplace superintegrable systems Table 1 contains a partial list of contractions. Keywords: algebra; bôcher; conformal; contractions; laplace; order; systems
• On some algebraic formulations within universal enveloping algebras related to superintegrability by Campoamor-Stursberg, Rutwig (2022) - 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. We report on some recent purely algebraic approaches to superintegrable systems from the perspective of subspaces of commuting polynomials in the enveloping algebras of Lie algebras that generate quadratic (and eventually higher-order) algebras. Keywords: algebra; algebraic; enveloping; hamiltonian; lie; operators; realization; systems

• OPTIMALIZATION OF PHOTOREACTOR GEOMETRY FOR THE CULTIVATION OF CHLAMYDOMONAS REINHARDTII by Fekete, Roman; Žáková, Terézia; Gabrišová, Ľudmila; Kotora, Peter; Peciar, Peter; Gahurová, Dominika; Slaninová, Miroslava (2018) - Investigation of the influence of the geometrical similarity on algae growth rate: a) after filling the cylinders with the culture media with the initial concentration of algae 24. An optimal ratio between biomass growth rate and its gross biomass yield as a function of the photoreactor geometry is searched. Keywords: algae; biomass; conditions; cultivation; culture; experiments; figure; growth; growth rate; light; medium; photoreactor; vessels; volume; yield
• Assessment of Human Hemodynamics under Hyper- and Microgravity: Results of two Aachen University Parabolic Flight Experiments by Blanik, N.; Hülsbusch, M.; Herzog, M.; Blazek, C. R. (2007) - 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: blood; fig; light; sensor; subjects

• EVALUATION OF THE SURFACE SETTLEMENT ABOVE THE PRAGUE METRO LINE A EXTENSION CONSTRUCTED BY TWO SHIELDS by Hilar, Matous; Tuan, Nhu The (2016) - [5] Beňo J., Hilar M.: Steel fibre reinforced concrete segments for tunnel linings – verification by extensive laboratory testing and numerical modelling. Variant B (contraction): (1.) initial stress; (2.) excavation and tunnel lining installation; (3.) tunnel lining contraction. Keywords: cross; metro; modelling; prague; section; settlement; tunnel

• Coherent State Quantization and Moment Problem by Gazeau, J. P.; Baldiotti, M. C.; Gitman, D. M. (2010) - Let us introduce the centre-coordinate operators x̂10 = x̂1 − 1 μω P̂2 , x̂20 = x̂2 + 1 μω P̂1 , (25) where ω = eB/μ is the cyclotron frequency. The number operator N̂ = â†â is such that its spectrum is exactly N with eigenvectors en : N̂ |en〉 = n|en〉. Keywords: coherent; operator; quantization; states
• Self-adjoint Extensions of Schrödinger Operators with ?-magnetic Fields on Riemannian Manifolds by Mine, T. (2010) - In the case M = R 2 and K = 1, similar results are obtained in [7] and Moreover, Lisovyy [11] studies the caseM is the Poincaré disk, g is the Poincaré metric, V = 0 and dA = Bωg+2παδ0, where B is a non-zero constant and ωg is the surface form induced from the Poincaré metric g. In all the results above, they first determine the deficiency subspaces Ker(Hmax ∓ i) and apply the Krein-Von Neumann theory. Keywords: define; let; min; operator
• Spectral Analysis of Schrödinger Operators with Unusual Semiclassical Behavior by Exner, Pavel; Barseghyan, Diana (2013) - Schrödinger operators in cusps with non-trivial geometry In the second part of the paper we shall discuss Schrödinger type operators HΩ = −∆Ω D 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: operator

• Production of Biocellulosic Ethanol from Wheat Straw by Ismail, W. Ali; Braim, R. Rasul; Ketuly, K. Aziz; Awang Bujag, D. Siti Shamsiah; Arifin, Zainudin (2012) - 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: acid; concentration; ethanol; fermentation; hydrolysis; min; straw; wheat; yeast
• Personal Dosimetry Enhancement for Underground Workplaces by Thinová, L.; Fronka, A.; Milka, D. (2005) - 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. The results from the group of evaluated caves did not confirm the presence of aerosol sources, or other sources of radon, apart from attendee rock (possibly water); high radon concentrations are accompanied by a very low flow rate; the equilibrium fac- tor varies mostly between 0.2–0.5; the unattached fraction constituted approximately 2 %. Keywords: aerosol; concentration; daughters; dose; radon

• ON THE SPEED OF SOUND IN STEAM by Šafarík, Pavel; Nový, Adam; Jícha, David; Hajšman, Miroslav (2015) - 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. From the thermodynamic point of view, wet steam in the equilibrium state is therefore considered to be a continuum, which contains both phases of water (sat- urated water liquid and saturated steam) according to the dryness value. Keywords: iapws; sound; speed; steam; wet
• A Proportional Integral Derivative (PID) Feedback Control without a Subsidiary Speed Loop by Aboelhassan, M. (2008) - 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. A comparison (shown in (Fig. 6:)) of P, PD, PID control- lers with-without the subsidiary speed loop shows that P and PID controllers have zero error (y w� � �) in a steady state, but the PD-controller has non-zero error. Keywords: controller; loop; pid; speed

• IMPROVEMENT OF MACHINE SAFETY DEVICES by Hevko, Bohdan Matviiovych; Hevko, Roman Bohdanovych; Klendii, Oleksandra Mykolaivna; Buriak, Mykola Vasyliovych; Dzyadykevych, Yurii Volodymyrovych; Rozum, Ruslan Ivanovych (2018) - This model is described by the following set of equations  ;21111   cTJ d    ;211221 mTcJ   (1)  ;432322   cTJ m    ,43243 rTcJ   where Td – rotating torque of a drive; Tm – rotating torque at half couplings interaction; Tr – operating element shaft resistive torque; 1с - reduces torque stiffness of drive elements between an engine and a driven half coupling; 2с - reduced torque stiffness of drive elements between a driven half coupling and an operating element shaft; 1 - angle of drive shaft torque; 2 - angle of drive half coupling torque; 3 - angle of driven half coupling torque; 4 - angle of operating element shaft torque; 1J - equivalent drive moment of inertia; 21J - equivalent drive half coupling moment of inertia; 22J - equivalent driven half coupling moment of inertia; 3J - equivalent operating element shaft moment of inertia. Screw conveyer with an overload clutch: 1 – nut; 2 – spring element; 3 – axial bearing; 4 – driven half coupling; 5 – drive half coupling; 6 – hopper; 7 – screw body; 8 – screw feeder; 9 – pipe (screw feeder shaft); 10 – needle bearing; 11 – solid shaft; 12 – flange drive side; 13 – frame; 14 – flange non-drive side; 15 – angular contact bearing; 16 – balls; 17 – rack Fig.2. Keywords: balls; clutch; contact; drive; element; half coupling; hollows; operating; overload; rotation; screw; torque
• A Discontinuous Model to Study Fracture of Brittle Materials by Proft, K. De; Wilde, W. P. De (2004) - B N tT T S S e �d d e� � � �� � (11a) H� � � � � i i T T i iTB N�d d� �� � �0 (i � 1, … m). d dW T Tcr n n pl t t pl� �� � (20a) and W Wcr cr t � �d 0 (20b) where !� � � �n pl t pl, are the normal and tangential com- ponent of the plastic separation vector. Keywords: crack; discontinuity; element; h �; � d; � e; � t; � �
• Membrane Triangles with Drilling Degrees of Freedom by Fajman, P. (2004) - 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 . 2: Extension from pure rotation �1 � 1 � � 1 1 21 21 1 13 13 1 21 2 1 2 21 u r s l L L ij ij ij i ( , ) � � � � � � �n t n t n t j ijl L L� �1 13 3 1 2 13n t , (3) where i � 2, 3, 1 and j � 1, 2, 3, and { } { , } {cos , sin }n ij xij yij nij nijn n� � � � is the outward unit normal vector of the element side ij, { } { , } {cos , sin }t ij xij yij nij nijt t� � � � is the unit vector of the element side ij (Fig. 4). Keywords: element; fig; � �

• The GNU GaMa Project - Adjustment of Geodetic Networks by Čepek, A. (2002) - 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: adjustment; free; gama; gnu; project; software; xml

• Anchor test and long-term monitoring of grouted anchors instrumented with Fiber Bragg Grating sensing technology by Runcziková, Daniela; Záleský, Jan; Záleský, Marek; Koller, Jakub; Šašek, Ladislav (2025) - A FBGs sensors distance was approximately 1 metre, the posi- tions of the sensors on the anchors (centre of anchor and surface of anchor root) installed in the boreholes and a simple geological description of the subsoil are shown in Figure 1. This article deals with anchor tests instrumented with FBG deformation gauges of the root and the tendon of the pre-stressed strand anchor in a test field in the Central Bohemian Region. Keywords: anchor; deformation; fiber; figure; monitoring; root; sensors
• Using the Spindle Cooling Temperature as a Tool for Compensating the Thermal Deformation of Machines by Vyroubal, J. (2010) - 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: deformation; machine; sensors; spindle
• ANALYSIS OF WELD JOINT DEFORMATIONS BY OPTICAL 3D SCANNING by Urminsky, Jan; Marônek, Milan; Jáňa, Miroslav; Morovič, Ladislav (2016) - Angular deformations are adverse from all group and can degrade the utility of the weld- ment. Angular deformations were not observed throughout the thickness of the material. Keywords: atos; bimetal; deformation; max; weld

• Models of Financing and Available Financial Resources for Transport Infrastructure Projects by Pokorná, O.; Mocková, D. (2001) - 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: financing; infrastructure; project; sector; transport
• Support for Expert Estimations in Transportation Projects by Pastor, O.; Novotný, P.; Melechovský, J. (2007) - 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: probabilities; project; risk

• Dimension of Fracture Surfaces by Ficker, T. (2007) - The generalized Balshin function then reads � � �� � � �� � � �� � � � � 0 0 0 01 1 0 1 1 * ( ) , , P P s P b s b P k k cr cr 0 0 0 0� � �� � �* * , Pk cr , (5) where P is total porosity and � is compressive strength of the sample with a virtually incompressible fluid filling at least a part of its pore space. If the fracture surface were a perfect Euclidean plane (S � 2), expression (7) would lead to the well-known equation D Di i * � 1. Keywords: dimension; fractal; fracture; � �

• Topics on n-ary Algebraic Structures by Azcárraga, J. A. de; Izquierdo, J. M. (2010) - 1 Introduction The Jacobi identity (JI) for Lie algebras g, [X, [Y, Z]]+ [Y, [Z, X ]] + These two identities show that the inner derivations adX associated with the fundamental ob- jects X generate (the ad map is not necessarily injec- tive) an ordinary Lie algebra, the Lie algebra associ- ated with the FA G. An important type of FAs, because of its rele- vance in physical applications where a scalar product is usually needed (as in the Bagger-Lambert-Gustavsson model in M-theory), is the class of metric Filippov al- gebras. Keywords: algebras; lie
• Infinitesimal Algebraic Skeletons for a (2 + 1)-dimensional Toda Type System by Palese, M.; Winterroth, E. (2011) - We observe that by the homomorphismX4 = X5 = 0 and X8 = νX3 we get a closed Lie algebra (which is different from the Lie algebra corresponding to the Euclidean group in the plane obtained above): It is easy to verify that on every integral submanifold defined by u = u(x, y, z), p = ux, q = uy, r = uz, with dx ∧ dy ∧ dz �= 0, the above ideal is equivalent to the Toda system under study. Keywords: lie
• NOTE ON VERMA BASES FOR REPRESENTATIONS OF SIMPLE LIE ALGEBRAS by Pošta, Severin; Havlíček, Miloslav (2013) - 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. Keywords: Verma basis, enveloping algebra, Lie algebra. Keywords: algebras; bases; i−1; lie; math; representations; verma
• ON CONNECTING WEYL-ORBIT FUNCTIONS TO JACOBI POLYNOMIALS AND MULTIVARIATE (ANTI)SYMMETRIC TRIGONOMETRIC FUNCTIONS by Hrivnak, Jiri; Motlochova, Lenka (2016) - [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: cos; functions; lie; orbit; polynomials; sin; weyl

• Electronic Education by Vaněček, D.; Jirsa, J. (2011) - We will fo- cus on computer animations, which are discussed in greater detail in the second and third parts of this paper. DHTML itself is not very efficient for web animation purposes, because it only involves moving static pictures inside the win- dow area. Keywords: animation; computer; education; internet; learning; students; systems; use; web

• Lab-scale Technology for Biogas Production from Lignocellulose Wastes by Krátký, Lukáš; Jirout, Tomáš; Nalezenec, Jiří (2012) - The influences of LHW on the structure of wheat straw and boxboard are shown in Figure 5. A) straw before B) straw after C) boxboard before D) boxboard after Figure 5: Influence of LHW on the structure of biomass — processing parameters 200 ◦C, 20 min 56 Acta Polytechnica Vol. 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]. 4 Lab-batch tests for an investigation of biogas yield A test known as Biochemical Methane Potential (BMP) is widely used for evaluating the anaerobic biodegrability of wastes. Keywords: biogas; biomass; figure; lab; lhw; pretreatment; technology
• Ultra Wideband Communications: History, Evolution and Emergence by Lakkundi, V. (2006) - UWB radios are designed to use coherent wide-rela- tive-bandwidth propagation, which has no Rayleigh fading. Another chal- lenge is the need for the industry to agree upon common standards for interoperability of UWB devices. Keywords: applications; communications; radar; technology; uwb; wideband

• Allocation and Location of Transport Logistics Centres by Mocková, D. (2010) - The difficulty of multiple criteria evaluation tasks results not only from the number of evaluation criteria, but also from how these criteria are expressed and from the degree which they are dependent on their nature in various units of measurement. 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. Keywords: criteria; decision; evaluation; making; options; problem
• COMPARISON OF EXPLORATION STRATEGIES FOR MULTI-ROBOT SEARCH by Kulich, Miroslav; Juchelka, Tomáš; Přeučil, Libor (2015) - 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. The strategy lacks opti- mality2, since one goal can be selected and explored by many robots as depicted in Fig. 1(a). Keywords: environment; exploration; goal; map; means; problem; robots; search; strategies
• HYBRID REASONING FOR MULTI-ROBOT DRILL PLANNING IN OPEN-PIT MINES by Mansouri, Masoumeh; Andreasson, Henrik; Pecora, Federico (2016) - Machine Allocation Sub-problem Each possible solu- tion has complex ramifications on other sub-problems: different allocations will affect the amount of coordi- nation necessary; allocations must be such that the final mission of a machine is not surrounded by piles (drilled by other machines), which would make it im- possible to navigate to its final parking pose. Keywords: constraints; decision; drill; figure; machine; mission; motion; planning; problem; robot; sequencing; solver; sub; targets
• PARALLEL MACHINE SCHEDULING WITH MONTE CARLO TREE SEARCH by Agárdi, Anita; Nehéz, Károly (2021) - 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: job; machine; problem; scheduling; search; setup; times; tree

• Analysis of Mismatched First Order A Priori Information in Iterative Source-Channel Decoding by Schotsch, B.; Vary, P.; Clevorn, T. (2007) - The autocorrelation takes on values from a finite set, e.g., � �� � 00 01 09. , . The resulting codeword is denoted as y with bits y, which are mapped to bipolar bits � ���y � � 1 for BPSK transmission with symbol energy Es �1. Keywords: assignments; correlation; index; information; soak1; source; � t; � �

• Microstructure of the Transitional Area of the Connection of a High-temperature Ni-based Brazing Alloy and Stainless Steel AISI 321 (X6CrNiTi 18–10) by Augustin, R.; Koleňák, R. (2010) - It was also found that a slightly increased content of B in brazing alloy NI 102-01 in comparison to NI 102-02 caused better wetting of the surface of PM. For the same brazing parameters, brazing alloy NI 102-02 achieved deeper diffusion of the brazing al- loy into PM, whereas better penetration of PM into the brazing alloy occurred with brazing alloy NI 102- 01. Keywords: alloy; brazing
• Application of Induction Heating for Brazing Parts of Solar Collectors by Demianová, Kristína; Ožvold, Milan; Turňa, Milan (2012) - Mn Mg Zn Cr Al 0.05–0.15 0.06–0.35 max. 0.1 0.3–0.6 0.02–0.20 0.05–0.3 max. 0.25 balance Table 3: Chemical composition of brazing alloy type Al 104 Brazing alloy type Al 104 (Table 3) in the form of wire was used for fabricating the flange-tube joint. Keywords: alloy; brazing; flux; induction; joint

• EXPERIMENTAL VERIFICATION OF THE STRUCTURAL AND TECHNOLOGICAL PARAMETERS OF THE PKS by Onderová, Iveta; Kolláth, Ludovít; Ploskuňáková, Lucia (2014) - 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 + (zj − z̄)2, Sl Positioning accuracy and position repeatability 4.1. Keywords: accuracy; position; positioning; telescopic
• Power Producer Production Valuation by Kněžek, M. (2008) - (7) The total difference from plan fulfillment will be given as the sum of the actual historical variance and the expected fu- ture variance in a one-year time window: � � �� �� �Act Futtd td td td . 3 Closed historical position A closed historical position is a position for the period from the beginning of the current year to the present date, and is calculated as the sum of the concluded contract vol- umes per hour and day of the relevant period, while the following applies: qS qG qPtd td td td td td � � �� � , (1) where qStd is the volume of sold electricity for hour t of day Keywords: electricity; position; td td; td �; � �

• The Science Policy of the Joint Institute for Nuclear Research by Sissakian, A. (2010) - 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 research programmes im- plemented at JINR have led to a significant scientific output in fundamental nuclear science. Keywords: activities; institute; jinr; member; nuclear; physics; programme; research; states
• FOREWORD: THREE QUARTERS A CENTURY by Exner, Pavel (2013) - 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. Acta Polytechnica doi:10.14311/AP.2013.53.0007 Acta Polytechnica 53(5), 2013 © Czech Technical University in Prague, 2013 available online at http://ojs.cvut.cz/ojs/index.php/ap THREE QUARTERS A CENTURY Foreword to Special Issue Dedicated to Prof. Miloslav Havlíček Such a number of years makes one think, as the famous phrase in Some Like it Hot goes. Keywords: life; physics
• Swanson Hamiltonian revisited through the complex scaling method by Reboiro, Marta; Ramírez, Romina; Fernández, Viviano (2022) - Communications in Mathematical Physics 27:1–9, 1972. https://doi.org/10.1007/BF01649654. Journal of Physics A: Mathematical and General 35(31):L467–L471, 2002. https://doi.org/10.1088/0305-4470/35/31/101. Keywords: eigenfunctions; hamiltonian; journal; mathematical; physics; swanson
• Analytic and Algebraic Methods in Physics by Khrabustovskii , Andrii; Znojil , Miloslav (2022) - 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. Fortunately, every cloud has a silver lining: the related reduction of the capacity of the scientific communication channels led to the willingness of the participants to return to the recently almost abandoned tradition of complementing the Zoom-mediated meeting by a subsequent preparation of an AAMP-oriented Special Issue (SI) of Acta Polytechnica. Keywords: aamp; physics

• Influence of Brick Walls on the Temperature Distribution in Steel Columns in Fire by Correia, António J. P. Moura; Rodrigues, Joao Paulo C.; Silvac, Valdir Pignatta e (2009) - 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; fig; fire

• Numerical solution for stochastic Volterra-Fredholm integral equations with delay arguments by Yao, Kutorzi Edwin; Zhang, Yuxue; Shi, Yufeng (2024) - Consider the stochastic Volterra Fredholm integral equation with time delay τ > 0: X(t) = −5τ − t + 12t2 − t3 − t4τ + ∫ t 0 (t − s)X(s − τ)ds + ∫ 1 0 (t + s)X(s − τ)ds + ∫ t 0 sX(s − τ)dB(s), (41) where s, t ∈ − X̂(s − τ)|| ) ds ≤ C · O(h4) + C · O(h4) = O(h4). Keywords: delay; equations; integral; stochastic; − τ; − ∫

• Prospects for Advanced Engineering Design Based on Risk Assessment by Holický, M. (2001) - If the failure of structure F due to a particular situation Hi occurs with the conditional probability P(F|Hi), then the total probability of failure pF is given as: � � � �p F H HF The total expected cost Ctot can then be given by a simplified equation (3) as a sum � � � � � � � �C C C C p Ctot f� � � � 14 15 16 1713 8 10 11 11 12 12, , , (6) where, as described above, C14(13) is the cost depending on the state of node 13, C15(8, 10, 11) is the damage cost depend- ing on the states of nodes 8, 10 and 11, and C16(11, 12) is the cost due to flashover depending on the state of nodes 11 and 12. Keywords: cost; failure; fire; node; probability; structural; � �
• TESTS ON 10.9 BOLTS UNDER COMBINED TENSION AND SHEAR by Kawohl, Anne Katherine; Lange, Jörg (2016) - 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. There was less strength loss with pure shear tests. Keywords: bolts; fire; shear; tests

• Photometric Analysis of the Pi of the Sky Data by Siudek, M.; Malek, K.; Mankiewicz, L.; Opiela, R.; Sokolowski, M.; Zarnecki, A. F. (2011) - 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. 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: measurements; photometry; sky; stars
• The Optical Transient Search in the Bamberg Southern Sky Survey: Preliminary Results by Hudec, R.; Kopel, F.; Krapp, P.; Heber, U.; Cayé, W. (2012) - The cluster of sky patrol photographic cameras operated in the Boyden Observatory, South Africa, by the Bamberg Observatory. Here we report on an extended study based on blink-comparison of 5004 Bamberg Observatory Southern Sky Patrol Plates performed within a student high school project (Jugend Forscht). Keywords: bamberg; observatory; patrol; plates; sky
• Classification of Variable Objects for Search for GRB Candidates on Bamberg Photographic Plates by Hudec, René; Kopel, Fabian; Macsics, Robert; Hadwige, Markus; Heber, Ulrich; Cayé, Walter (2013) - 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). The catalogue is divided according to classification types of non-classified objects, namely previously known and newly discovered variable stars, asteroids, emulsion defects, and true OT-GRB candidates. Keywords: bamberg; images; objects; plates; sky

• Electronic Education at the Faculty of Nuclear Sciences and Physical Engineering by Vaněček, D.; Klement, V. (2010) - The next milestone of e-learning was during the period of 1984 and 1993. First attempts to introduce e-learning appeared around the year 1999, and since then the number of projects dealing with this topic is increasing. Keywords: education; faculty; internet; learning; students; support

• Communication between a Matrix Converter Modulator and a Superset Regulator by Pošta, P. (2008) - Keywords: matrix converter, FPGA, VHDL, power electronics. 1: Matrix converter 3×3 4 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 48 No. 3/2008 Fo ur th St ep T hi rd St ep Se co nd St ep Fi rs t S te p Keywords: converter; input; regulator; switching

• LIMIT ON UHE NEUTRINO FLUXES FROM THE PIERRE AUGER OBSERVATORY by Maldera, S. (2013) - 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). Identification of ν candidates Neutrino induced showers have to be extracted from a large background of cosmic ray showers (protons or heavier nuclei). Keywords: auger; earth; flux; limits; neutrino; showers

• SILOXANES REMOVAL FROM BIOGAS USING ACTIVATED CARBON by Vagenknechtová, Alice; Ciahotný, Karel; Vrbová, Veronika (2017) - For siloxane removal from biogas, its adsorption on activated carbon is often used. Using laboratory apparatus and biogas produced from waste-water treatment sludge at the wastewater treatment plant Prague Bubeneč various activated carbons were tested for siloxane removal and their adsorption capacities for siloxanes were estimated, and the adsorbent cost relative to 1 kg of siloxanes removed from biogas were calculated. Keywords: adsorbents; adsorption; apparatus; biogas; carbon; compounds; removal; separation; siloxanes; substances; testing

• DESIGN THEORY FOR THE PRESSING CHAMBER IN THE SOLID BIOFUEL PRODUCTION PROCESS by Kováčová, Monika; Matúš, Miloš; Križan, Peter; Beniak, Juraj (2014) - Forces in cylindrical pressing chamber. − d2 2)− dpa d2 2 = pa(2 tanα dx d2 + 4 tan2 αdx2)− dpa d2 2. Keywords: chamber; pressing
• OPTIMIZING EFFICIENCY OF THE COMBINED SEWER OVERFLOW CHAMBER HOBAS by Procházka, Jiří; Pollert, Jaroslav (2020) - 15 shows the process of the self-cleaning ef- fect of swinging screen bars, which occurs during the simulation of the ending rain event, when a gradual decrease in the level in the CSO causes a significant oscillation of the free ends of the rods of screen bars from which all remaining impurities are released. The main goal of the research was to determine the pressure losses of the overflow chamber under various conditions - without self-clean screen bars; with screen bars without impurities and with screen bars partially or fully clogged with various impurities. Keywords: chamber; cso; hobas; losses; overflow; rods; screen bars; self

• MEASURING SUPERMASSIVE BLACK HOLE SPINS IN AGN by Brenneman, Laura (2013) - [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. I begin in §2 with an examination of the spectral modeling techniques used to measure BH spin in AGN. Keywords: agn; disk; kev; line; spin
• X-RAY TRANSMISSION AND REFLECTION THROUGH A COMPTON-THICK MEDIUM VIA MONTE-CARLO SIMULATIONS by Eikmann, Wiebke; Wilms, Jörn; Smith, Randall K.; Lee, Julia C. (2014) - 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; compton; geometry; line; scattering; spectrum
• X-RAY VARIABILITY STUDY OF POLAR SCATTERED SEYFERT1 GALAXIES by Beuchert, Tobias; Wilms, Jörn; Kadler, Matthias; Longinotti, Anna Lia; Guainazzi, Matteo; Miniutti, Giovanni; de la Calle, Ignacio (2014) - As X-ray sources of AGN are assumed to have a diameter of 10rS, the cloud diameter must be > 10rS in order to cover the central source [10]. The shortest measured timescale of 5 days is due to warm absorber variability. Keywords: absorber; galaxies; line; mrk; seyfert; variability

• Design of a Low-Cost Easy-to-Fly STOL Ultralight Aircraft in Composite Material by Coiro, D. P.; Marco, A. de; Nicolosi, F.; Genito, N.; Figliolia, S. (2005) - 2: Take off ground run STOG versus take off parameter TOP chosen, based on the criteria for keeping the wing area as small as possible (mainly for cost reasons) and using ap- propriate values of maximum take off and landing lift coef- ficient ((W/S)TO � 324 N/m2, S � 13.6 m2, CLmaxTO � 2.45, CLmaxL � 3.12). Altitude. �, �0 Density, density at sea level. Keywords: aircraft; fig; maximum; � �

• Genetic Algorithm Optimisation of a Ship Navigation System by Alfaro-Cid, E.; McGookin, E. W.; Murray-Smith, D. J. (2001) - They have three basic modes of operation: propor- tional action, in which the actuation signal is proportional to the error signal, integral action, when the actuation signal is proportional to the time integral of the error signal, and derivative action, where the actuation signal is proportional to the time derivative of the error signal, and their transfer function is given by: � � � � � �D s K K s K s E sI D � � . � � � �1 0001 10 2 2c d Keywords: controller; cost; heading; input �; optimisation; propulsion; � �

• Aerodynamic Design of a Tailless Aeroplan by Friedl, J. (2001) - �w �0 CL� �CL� 16: Local CL along span, unsymmetrical cases �0 CM0as CL� CM� Keywords: deg; fig; lift; wing

• Pollutant Removal from Highway Runoff Using Retention/Detention Units by Elsayed, Ashraf El-Shahat; Grünwald, A.; Dvořák, D. (2001) - 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. Highway runoff contains to- tal suspended solids, hydrocarbons, oil and greases, chloride, and other contaminants that are transported in solution and particulate forms to adjacent floodplains, roadside swales, and retention/detention ponds. Keywords: constituents; detention; grit; highway; oil; runoff; solids; units

• 3D Modelling of a Tunnel Re-excavation in Soft Ground by Hilar, M. (2011) - The model was prepared for analysing the conditions input into the 2D calcu- lations (location of geotechnical units, input param- eters, tunnel lining, etc.) 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: excavation; lining; pile; tunnel; walls

• A DIFFERENTIAL INTEGRABILITY CONDITION FOR TWO-DIMENSIONAL HAMILTONIAN SYSTEMS by Mostafazadeh, Ali (2014) - 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: hamiltonian

• Age Dependence of Children’s Speech Parameters by Janda, J. (2009) - The above-mentioned spectral characteristics of sibilant consonants were measured for consonants /s/, /ss/ and /cc/. Significant features were especially the rise in the spectral cen- tre of gravity (r � 0 45. , p � 0001. , n �193) (Fig. 3, 4) and the reduction in spectral skewness (r � �0 47. , p � 0001. , n �193) (Fig. 2) at consonant /s/ (p � 0001. , n �193) and F2 had r � �034. Keywords: age; centre; spectrum; speech

• Properties of Erbium and Ytterbium Doped Gallium Nitride Layers Fabricated by Magnetron Sputtering by Prajzler, V.; Burian, Z.; Hüttel, I.; Špirková, J.; Hamáček, J.; Oswald, J.; Zavadil, J.; Peřina, V. (2006) - GaN films grown using the Ga2O3 target at room tem- perature had an amorphous structure, while GaN films fabri- cated using the Ga target at room temperature had poly- crystalline structure (According to the literature, GaN layers fabricated at an elevated temperature (above 800 °C) can have a single crystalline structure 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. Keywords: erbium; gan; layers; target; vol; ytterbium

• Parity Codes Used for On-Line Testing in FPGA by Kubalík, P.; Kubátová, H. (2005) - 3: Fault Model – Example G a a a a a a a a � 1 0 0 0 1 0 0 0 1 11 12 1 3 1 4 2 1 2 2 2 3 2 4 � � � � � � � , , , , , , , , � � � � a a a a111 112 11 3 11 4, , , , � � � � � � � � � � � � � � Fig. 4: Generating matrix for Hamming code (15, 11) 1 1 1 1 0 1 1 1 1 0 1 1 0 0 1 1 1 1 0 1 0 1 0 1 0 0 0 1 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Fig. In addition to some commercial tools such as Leonardo Spectrum [13] and Synplify [12] we used format converting tools, parity circuit generator tools and simulation tools. Keywords: area; bits; circuit; code; error; fault; fig; lut; output; parity; � �

• ANAEROBIC DIGESTION OF LANDFILL LEACHATE WITH NATURAL ZEOLITE AND SUGARCANE BAGASSE FLY ASH AS THE MICROBIAL IMMOBILIZATION MEDIA IN PACKED BED REACTOR by Sudibyo, Hanifrahmawan; Shabrina, Zata Lini; Wondah, Hartika Rafih; Hastuti, Retno Tri; Purnomo, Chandra Wahyu; Budhijanto, Wiratni (2018) - MATLAB calculation result for acidogenic cell (X1) inside the digester using natural zeolite and BFA as immobilization media. Comparison of SSE results of anaerobic leachate digestion using sugarcane bagasse fly ash as the immobilization media. Keywords: anaerobic; bfa; cell; contois; correlation; digester; digestion; immobilization; immobilization media; kinetics; landfill; leachate; media; methane; scod; vfa; zeolite
• A New Methodology to Establish Upper Bounds on Open-Cell Foams Homogenized Properties by Dimitrovová, Z. (2004) - 3: Specification of optimal media response i 1y 2y 3y iN iN i� il iA bari Fig. 4: Specification of the i-bar within the basic cell Taking into account (22–23), (20) can be substituted into (4) giving: � �� � � � � 1 1 1 2 3 1 2 3V V T T TS N R R R Q Q Q N, , , , , , (28) and (21) into (5) as: W V Es � N 2 2 , (29) where S will be named as the modified static matrix. Using superposition, the necessary maximality condition from Table 2 reads as: N ( P P P P P P� � 1 2 1 1 1 2 2 3 3 1 1 2 2 3 3 G* ) ,� � � � � � (36) where the coefficients �i are expressing the particular basic cases combination, corresponding to the imposed macroload. Keywords: cell; e �; j �; media; q �; s �; sin �; � cos; � g; � jk; � k; � l; � �

• On Some Statistical Properties of GRBs with Measured Redshifts Having Peaks in Optical Light Curves by Beskin, Grigorii; Greco, Giuseppe; Oganesyan, Gor; Karpov, Sergey (2013) - optical peaks arise during the main phases of the prompt gamma-ray emission; we will refer to these as prompt optical emission. We studied pair correlations of their gamma-ray and optical parameters, e.g. total energetics, peak optical luminosities, and durations. Keywords: gamma

• Perturbation Theory for PT-Symmetric Sinusoidal Optical Lattices at the Symmetry-Breaking Threshold by Jones, H. F. (2011) - 2 Band structure at threshold At the threshold λ = 1, the potential V in Eq. (2) be- comes the complex exponential V = V0 exp(2iπx/a), for which the Schrödinger equation is − ψ′′ − V0 exp(2iπx/a)ψ = βψ. 2: Characteristic behaviour of error functions whose arguments are (a) real or (b) have a large imaginary part. Keywords: 4iz; functions
• A BOSE-EINSTEIN CONDENSATE WITH PT-SYMMETRIC DOUBLE-DELTA FUNCTION LOSS AND GAIN IN A HARMONIC TRAP: A TEST OF RIGOROUS ESTIMATES by Haag, Daniel; Cartarius, Holger; Wunner, Günter (2014) - Bound states of n-dimensional harmonic oscillator decorated with dirac delta functions. two real eigenvalues the lower of which remains real for any γ, while the higher after a small interval of γ coalesces with the real eigenvalue of the second excited state and a new pair of complex eigenvalues is born. Keywords: delta; eigenvalues; functions
• TWO-DIMENSIONAL HYBRIDS WITH MIXED BOUNDARY VALUE PROBLEMS by Szajewska, Marzena; Tereszkiewicz, Agnieszka (2016) - C2 case From the projection matrix PC2 (1) and the branching rule (2) we find two separation constants −k2 1 and −k2 2, which have a form −k2 1 = −2(a+ b)2π2, w2 − k2 1 = 2b2π2, −k2 2 = −2b2π2, w2 − k2 2 Noting that k2 1 = w2 − k2 2, as a separation constant we take −k2 = −2(a+ b)2π2, w2 − k2 = 2b2π2. Keywords: b(x; boundary; functions
• ON GENERALIZATION OF SPECIAL FUNCTIONS RELATED TO WEYL GROUPS by Háková, Lenka; Tereszkiewicz, Agnieszka (2016) - 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 : W → {±1}. Keywords: characters; functions; groups; weyl; −1 −1

• ANALYSIS OF PARAMETERS AFFECTING THE QUALITY OF A CUTTING MACHINE by Onderová, Iveta; Šooš, Lubomír (2014) - Scheme of measurement axes Y . Scheme of measurement axes X. out in both directions, i.e. from the right (marked as −) and from the left (marked as +). Keywords: accuracy; axis; machine; positioning

• THE INFLUENCE OF SILVER NANOPARTICLES SYNTHESIS ON THEIR PROPERTIES by Mražíková, Anna; Velgosová, Oksana; Kavuličová, Jana; Krum, Stanislav; Málek, Jaroslav (2018) - SEM and TEM images and the antimicrobial effect of (a,top) biosynthesized AgNPs (b,middle) gelatin/sodium citrate-AgNPs (c,bottom) sodium citrate-AgNPs. from 416 to 433 nm points to the creation of larger average particle sizes as it was reported by many au- thors The UV-vis, SEM and TEM analy- ses revealed that biosynthesized AgNPs using algae extract exhibited long-term stability and also good antimicrobial activity against the green algae which could be attributed to the smallest sizes of the Ag- NPs. Keywords: agnps; algae; citrate; doi:10.1016; gelatin; green; nanoparticles; silver; sodium; synthesis

• FACT — LONGTERM MONITORING OF BRIGHT TeV BLAZARS by 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. (2014) - 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. One major task of the large currently operating Cherenkov telescopes, is to search for new sources. Keywords: blazars; cherenkov; fact; longterm; markarian; monitoring; telescope

• STRUCTURE FROM MOTION PROCESSING OF ANALOGUE IMAGES CAPTURED BY ROLLEI METRIC CAMERA, DIGITIZED WITH VARIOUS SCANNING RESOLUTION by Dlesk, Adam; Vach, Karel; Pavelka, Karel (2020) - A parameter, which each side of image resolution divides by 4, had to be used. In the case of point clouds generated in Agisoft PhotoScan, p-values computed by Shapiro-Wilk test showed a sufficient confidence except for sets ∆X and ∆Y at the point cloud generated from the 1000 dpi scanning resolution images, see Tab. 9. Keywords: agisoft; cdw; dpi; images; micmac; photoscan; points; processing; resolution; scanning
• Embedded Coding of Astronomical Images by Elnagahy, F. I. Y.; Haroon, A. A.; Azzam, Y. A.; Alawy, A. El-Bassuny; Elminir, H. K.; Šimák, B. (2006) - The subjective quality tests show that RPSWS reconstructed images are better than SPIHT reconstructed images at lower bit rates, as shown in Fig. At higher bit rates there are no significance differences in the visual qualities of the SPIHT and RPSWS reconstructed images. Keywords: band; bit; coding; images; rpsws; spiht; sub; wavelet

• The Electrification of Tramways in Ostrava in 1900–1901 by Závodná, Michaela (2012) - Electric trams were to be put into operation in Ostrava in October 1900 The first part of this paper deals with technical aspects of electrification the change-over from steam power to electric power, while the second section analyses the dealings between these private companies, subsequent municipalization and the involvement of the municipal self-government of Moravská Ostrava. Keywords: company; electrification; moravská; ostrava; transport

• SUPERNOVA 1987A: CELEBRATING A SILVER JUBILEE by Panagia, Nino (2013) - [34] Maran, S.P. et al. 2000, ApJ, 545, 390 [35] Mattila, S. et al. 2010, ApJ, 717, 1140 [55] Staveley-Smith, L. et al. 2007,in Supernova 1987A: Twenty Years After: Supernovae and Gamma-Ray Bursters, eds S. Immler, R. McCray & K.W. Weiler (AIP, New York), AIP Conf. Keywords: 1987a; apj; et al; explosion; ring; star; supernova

• METALS IN THE ICM: WITNESSES OF CLUSTER FORMATION AND EVOLUTION by Lovisari, Lorenzo; Laganá, Tatiana F.; Borm, Katharina; Schellenberger, Gerrit; Reiprich, Thomas H. (2013) - 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: clusters; enrichment; icm; metal; metallicity

• Delamination of polyimide in hydrofluoric acid by Al-mashaal, Asaad K. Edaan; Cheung, Rebecca (2021) - This study is intended to provide the information on the compatibility of using polyimide films with HF, which can help in the design and fabrication of polyimide-based devices. The importance of polyimide films is due to their outstanding thermal, mechanical, and chemical prop- erties. Keywords: delamination; etchant; etching; figure; film; polyimide; silicon; substrate

• Multi-agent Contracting and Reconfiguration in Competitive Environments using Acquaintance Models by Bíba, J.; Vokřínek, J. (2006) - 3.2 Contract setting An extension of levelled commitment contracts has been introduced by Excelente-Toledo et al. in [8]. Keywords: multi-agent systems, competitive environments, reconfiguration, decommitment, contract price, penalty. may consequently harm the others. Keywords: agent; commitments; contract; contracting; costs; customer; environments; margin; profit; provider; reconfiguration

• Influence of Different Speech Representations and HMM Training Strategies on ASR Performance by Bořil, H.; Fousek, P. (2006) - 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: features; lombard; mfcc; plp; speech; training

• Replacing Natural Gas by Biogas — Determining the Bacterial Contamination of Biogas by PCR by Čermáková, Jiřina; Mrázek, Jakub; Fliegerová, Kateřina; Tenkrát, Daniel (2012) - Most of the biogas that is produced comes from treated sewage sludge and biogas plants, and these systems do not contain a pasteurization step. Biogas samples for DNA extraction were collected by filtration through a 0.22 μm nylon membrane fil- ter (Millipore) directly behind the digester and the adsorption unit. Keywords: biogas; biomethane; digester; microorganisms; pcr; plant; vol
• Design and Optimization of a Turbine Intake Structure by Fošumpaur, P.; Čihák, F. (2005) - 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 � �u 2 2 � � �C k2 (5) The k-� model contains the following constants, whose values are based on hydraulic model research: The above-specified equations for 2-D turbulent flow were approximated by the Finite Element Method in the FEMLAB computing environment. Keywords: k �; pier; plant; scenario; � u; � �

• About the time evolution of coherent electron states in monolayers of boron allotropes by Díaz-Bautista, Erik (2022) - Physical Review B 81(24):241412, 2010. https://doi.org/10.1103/physrevb.81.241412. Physical Review B 86(15):155435, 2012. Keywords: boron; borophene; dirac; electric; electron; graphene; physical; pmmn; review; states; ­10; ­15

• A Small Transfer and Distribution System for Liquid Nitrogen by Šimáně, Č.; Vognar, M.; Kříž, J.; Němec, V. (2001) - The return of the plunger during the intake period is assured © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 29 Acta Polytechnica Vol. 41 No.1/2001 A Small Transfer and Distribution System for Liquid Nitrogen Č. Šimáně, M. Vognar, J. Kříž, V. Němec A system for remotely controlled filling of small Dewars with liquid nitrogen from a central storage Dewar vessel is described, consisting of a plunger type pump with an electromechanical driver and electromechanical ball type valves for distribution of liquid nitrogen. Keywords: liquid nitrogen, transfer system, solenoid pump, solenoid valve, automatic level control. Keywords: nitrogen; pump; valve

• Cosmology and the Subgroups of Gamma-ray Bursts by Mészáros, A.; Řípa, J.; Balázs, L. G.; Bagoly, Z.; Veres, P.; Horváth, I. (2011) - 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, 1 741 (2008)). T90 is in seconds; for definitions of hardness, duration T90 and for more details see Horváth et al.: Keywords: grbs
• A Crazy Question: Can Apparently Brighter Gamma-ray Bursts Be Farther Away? by Mészáros, A.; Řípa, J.; Ryde, F. (2011) - The relationship shows that apparently fainter bursts need not, in general, lie at larger redshifts. It is a standard cosmological behaviour that for small z’s (z � 0.1) dl(z) ∝ z, and for large redshifts lim z→∞ dl(z) 1 + z = finite positive number for any Ho, ΩM , ΩΛ Keywords: grbs; redshifts

• GRB Duration Distribution Considering the Position of the Fermi by Szécsi, D.; Bagoly, Z.; Horváth, I.; Balázs, L. G.; Veres, P.; Mészáros, A. (2012) - However, we can announce that we have succesfully created a method that is able to separate the Fermi data from the motion-based background in such an effective way that statistical analyses can be made using the data. 3: After background fitting: the lightcurve of Fermi- burst 091030613 measured by the 3rd GBM detector. Keywords: background; fermi; figure

• Analysis of Gear Wheel-shaft Joint Characterized by Comparable Pitch Diameter and Mounting Diameter by Ryś, J.; Sanecki, H.; Trojnacki, A. (2003) - The forces F b( ) and �Fa ( )2 produce the resultant contact pressure at the conical surface of the joint � � � �� � p v s k k k kt b bE sE bE * sin sin cos ( ) � � � � � � � � � � � � � � �1 1 2 2 2 tg sE u u u Q 4 1 2� � � �tg � � � � , (12) where v d DmN b� ( ) . 4: Distribution of resultant contact pressure in the frictional joint loaded with the bending moment In Eqs. (17), � ��� b and � ��� t denote the products of partial fatigue factors, calculated for the considered part of the shaft in pure bending separately, and in pure torsion separately, and Sbn r , Stn r , Stn o stand for the endurance stresses in re- versed bending, reversed torsion, and one-direction torsion, respectively. Keywords: d �; joint; parameter �; tg �; u �; � f; � p; � �

• Simulation of Scoliosis Treatment Using a Brace by Čulík, J. (2004) - 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. Let us calculate the parameters C E h C E hP P 1 2 6 � �, , C C b C C C C b C C1 1 1 2 2 2 2 3 1 1 1 2 * *, ,� � � � C C b C b C C C C b b C C3 1 2 2 1 2 4 2 2 2 3 1 1 3 1 3 2 * *,� � � � � , where EP, h, b are the modulus of elasticity, thickness and width of the compressed soft tissue. Keywords: brace; l l; spinal; spine; t �; treatment; trunk; � k; � x; � �

• Lifetime Assessment of a Steam Pipeline by Janovec, Jiří; Poláchová, Daniela; Junek, Michal (2012) - 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. Keywords: life assessment of a steam pipeline, creep damage, assessment of microstructure damage. Keywords: assessment; creep; damage; life; operating; steam

• EFFECT OF IMPERATA CYLINDRICA REINFORCEMENT FORM ON THE TENSILE AND IMPACT PROPERTIES OF ITS COMPOSITES WITH RECYCLED LOW DENSITY POLYETHYLENE by Olusunmade, Olusola Femi; Bulus, Abba Emmanuel; Kashin, Terwase Kelvin (2018) - Compared to the other types of fibre form, the powder form has the smallest volume. However, the addition of short fibres has been found to be more effective. Keywords: composite; fibre; mat; particulate; rldpe; tensile

• MODERNIZATION FEATURES OF A VACUUM INSTALLATION BASED ON LOW-PRESSURE ARC DISCHARGE FOR COMPOSITE TIN-CU LAYERS FORMATION by Tsyrenov, Dmitriy; Semenov, Aleksandr; Smirnyagina, Natalia (2015) - A hybrid technology for forming composite TiN-Cu layers under the combined influence of a magnetron and low pressure arc discharges has been designed. Conclusion Preliminary results have been obtained for a hybrid technology for forming composite TiN-Cu layers with a simultaneous combination of a vacuum arc evaporator and a planar magnetron. Keywords: composite; figure; layers; magnetron; tin

• Computer Controlled Switching Device for Deep Brain Stimulation by Tauchmanová, J. (2007) - �� � �� �1 005194 0080111 2. �� �� �06487 014691 2, F q q q( ) . Keywords: brain; fig; response; � �

• Practical Implementation of Animation for Students of Pedagogical Studies at MIAS CTU in Prague by Vaněček, D.; Jirsa, J. (2011) - Introduction The main goal of this paper is to present didactic aspects of producing computer animations for use in education, to categorize types of animations and pro- vide examples. Abstract This paper shows computer animation as a teaching and learning instrument in technical education. Keywords: animation; flash; layers; students; symbols; type

• Directional Loudspeaker Using a Parametric Array by Ritty, A. (2006) - 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. AP_06_4.vp 1 Headline of a section The nonlinearities of air cause high frequency wave components (primary waves) to interact. Keywords: transducer; wave; � �

• PYROLYSIS OF BROWN COAL USING A CATALYST BASED ON W–Ni by Jílková, Lenka; Ciahotný, Karel; Kusý, Jaroslav (2015) - 4: Content of phenol, 4-methylphenol and 2,4-dimethylphenol in organic parts of pyrolysis condensates 0 1 2 3 4 5 6 7 8 pyrolysis of brown coal pyrolysis of brown coal + alum.pyrolysis of brown coal + alum. + cat. However, it is problematic to refine the liquids from brown coal pyrolysis, because high molecular compounds are produced, and the sample solidifies. Keywords: alumina; brown; catalyst; coal; content; pyrolysis

• A Short Note on Non-isothermal Diffusion Models by Ficker, T. (2003) - 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 non-isothermal difiLsion models were derived and compared with the standard isothermal models commonly used in building thermal technology. Keywords: models; relations

• On Tree Pattern Matching by Pushdown Automata by Flouri, T. (2009) - � � �� � � � � �� (2) � � � � � �� 3 A Deterministic Pushdown Automaton accepting trees in prefix notation The prefix notation of a tree can be generated by a gram- mar G N T P S� ( , , , ), having rules P of the following form: (1)S a� 0 (2)S a S� 1 (3)S a SS� 2 … (n)S a Sn n � � � 1 1 30 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 49 No. 2–3/2009 Since the grammar is LR(0), belonging to the subclass of context-free grammars named as deterministic context free grammars, the generated language belongs to the class of de- terministic context-free languages and can be recognised by a de- terministic pushdown automaton. Keywords: automaton; pattern; prefix; pushdown; s �; tree; � �

• New Policies to Facilitate Affordable Housing in Central and Eastern Europe by Amann, W. (2010) - 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: affordable; amann; construction; countries; financing; housing; market; ppp; rental

• Reconstruction of Object Position in X-ray Mammograms by Mikeš, P. (2003) - Experimental verification will rnake use of the similarity between human female breast tissue structure and that of a sow's breast. Calcifications and their relatively well-known links with various breast disorders are most frequently used for valuation of malignity. Keywords: axis; breast; compression; nipple; reconstruction; tissue

• Polynomial Solutions of the Heun Equation by Shapiro, B.; Tater, M. (2011) - The thick black dots mark the roots of Q, the green dots mark the roots of Van Vleck polynomials. Figure 3 suggests that the asymptotic root distribution of Van Vleck polynomials has a more complicated structure than before. Keywords: polynomials; roots; stieltjes; van
• RATIONALLY EXTENDED SHAPE INVARIANT POTENTIALS IN ARBITRARY D DIMENSIONS ASSOCIATED WITH EXCEPTIONAL Xm POLYNOMIALS by Yadav, Rajesh Kumar; Kumari, Nisha; Khare, Avinash; Mandal, Bhabani Prasad (2017) - r − 2(2B′ − 1)(2A′ + 1) cosh r + 4A′(A′ + 1) + 2B′ − 1 )2 − 8 (61) and χn,2(r) = Nn,2 (cosh r − 1)(B′−A′)/2(cosh r + 1)−(B′+A′)/2 (2B′ − 1)(2B′ − 2) cosh2 r − 2(2B′ − 1)(2A′ + 1) cosh r + 4A′(A′ + 1) + 2B′ − 1 × P̂ (B′−A′− 1 2 ,−B ′−A′− 1 2 ) n+2,2 (cosh r). Keywords: polynomials; potentials

• The Horizons of Observability in PT-symmetric Four-site Quantum Lattices by Znojil, M. (2011) - = { (a, b, c) ∈ R3 |W (a, b, c) > 0 , (3) Q(a, b, c) > 0 , P (a, b, c) > 0 } where W (a, b, c) = ( 8 + c2 − a2 )2 − (4) 4 [ 16 − (a + c)2 ] b2 , Q(a, b, c) = [ (a + 3)(c − 1) − b2 ] · (5)[ (a − 3)(c + 1) − b2 ] and P (a, b, c) = 10 − a2 − 2 b2 − c2 . As long as the –3 –2 –1 0 1 2 3 c –3 –2 –1 0 1 2 3 a Fig. 4: The degenerate case of the simply connected rec- tangular domain D(H) at b = 0 –2 –1 0 1 2 b –3 –2 –1 0 1 2 3 a Fig. 5: The triply connected nature of the triple-overlap domain D(H) for the quantum lattice of Figure 2 at c = 0 (i.e., in the no-central-coupling extreme) 106 Acta Polytechnica Vol. 51 No. 4/2011 condition Q(a, b, 0) > 0 degenerates to the elemen- tary constraint 3 + b2 > a > −3 − b2 just the left and right small horizontal-parabolic seg- ments (with their extreme at b = 0 and |amax| = 3) should be cut out of the elliptic domain with P (a, b, 0) > 0 as inadmissible since Q(a, b, 0) < 0 there. Keywords: domain; figure; vol

• OUR GALACTIC CENTER – THE NEAREST BURNING DISK by Kundt, Wolfgang (2013) - Keywords: galactic center, SgrA*, black holes, burning disk. In particular, supermassive BHs in the centers of galaxies were at some stage believed to be able to power gigantic outbursts, i.e. to help solving the energetics of galactic centers, before it became 508 vol. Keywords: burning; center; disk; figure; jet; kpc; scale; sgra

• Generalized Continuity Equation for Quasi-Hermitian Hamiltonians by Hammou, Amine B. (2013) - 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: potential; relation
• From quartic anharmonic oscillator to double well potential by Turbiner, Alexander V.; del Valle, Juan Carlos (2022) - 3. Double-well potential: wavefunctions Following the prescription, usually assigned in folklore to E. M. Lifschitz – one of the authors of the famous Course on Theoretical Physics by L. D. Landau and E. M. Lifschitz – when a wavefunction for single well potential with minimum at u = 0 is known, Ψ(u), the wavefunction for double well potential with min- ima at u = 0, 1 can be written as Ψ(u) ± Ψ(u − 1). Double well potential: perturbation theory, tunneling, WKB (beyond instantons). Keywords: potential

• THE NUMBER OF ORTHOGONAL CONJUGATIONS by Uhlmann, Armin (2013) - 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. Wigner also discovered the struc- ture of anti-unitary operators, [12], in finite dimen- sional Hilbert spaces. Keywords: anti; conjugations; hermitian; linear; skew

• NEUTRINOS AS COSMIC MESSENGERS IN THE ERA OF ICECUBE, ANTARES AND KM3NET by Katz, Uli F. (2013) - It is important to note that – at least for neutrino energies below a PeV – the field of view of neutrino telescopes is restricted to the lower hemisphere and therefore Galactic neutrino sources are difficult to observe from the South Pole. Keywords: neutrino astronomy, neutrino telescopes, ANTARES, IceCube, KM3NeT. 1. Keywords: .1667em\relax; \kern; antares; icecube; km3net; neutrino; sea; sources; telescopes

• Incorporation of Load Induced Thermal Strain in Finite Element Models by Law, A.; Gillie, M.; Pankaj, P. (2009) - 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: modulus; plastic; strains; � �

• Option Derivatives in Electricity Hedging by Pavlátka, P. (2010) - ap-4-10.dvi Acta Polytechnica Vol. 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: electricity; futures; hedging; market; options; price; risk

• Robotic Astronomy and the BOOTES Network of Robotic Telescopes by Castro-Tirado, A. J. (2011) - 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. The BOOTES network of robotic telescopes 2.1 BOOTES-1 The first robotic astronomical observatory in Spain was placed in the INTA’s Estación de Sondeos At- mosféricos (ESAt) at the Centro de Experimentación de el Arenosillo in Mazagón (Moguer, Huelva). Keywords: bootes; fig; filters; fov; station; telescope; transient

• XMM Observations of Metal Abundances in Galaxy Clusters by Lovisari, L.; Schindler, S.; Kapferer, W. (2011) - Due to the large potential wells of galaxy clusters they retain all the enriched material. Because the gas transfer affects the evo- lution of galaxy and galaxy cluster, it is important to know when and how the enrichment takes place. Keywords: cluster; galaxies; icm; metallicity
• Detection of Facial Features in Scale-Space by Hosten, P.; Asbach, M. (2007) - In the second subset all feature vectors describing the rest of the image are aggre- gated (class a � 0): � � � �F a F aface non face� � � � � �f f1 0, (8) Each subset is clustered with the k-means algorithm. (6) The columns of transform matrix � are the eigenvectors of �. Keywords: cluster; features; interest; points; scale; � �

• Management of People by Managers with a Technical Background - Research Results by Dobrovská, D. (2001) - 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). However, the ex- pectation that activities initiated by top management would be more effective than, for instance, activities initiated by personnel managers was not confirmed by our study. Keywords: companies; company; employees; management; managers; personnel
• Developing Model for Supply Chain Management - the Case of Croatia by Jurun, E.; Veza, I. (2004) - i i n � � � 1 (aggregate quality constraint) (6) l x LDi i i n � � � 1 (aggregate delivery constraint) (7) x Di i n � � � 1 (demand constraint) (8) x v i ni i� �1, ,� (supplier constraints) (9) x i ni � �0 1, ,� (non-negativity constraint) (10) Let us assume that the producer requires the total quantity of goods D, therefore x Dijk k l j m i i n ��� ��� � 111 ( ) (21) must be valid. Keywords: chain; enterprises; management; planning; price; supplier; supply; � �

• Thermal and Hygric Expansion of High Performance Concrete by Toman, J.; Černý, R. (2001) - (4) Defining the relative elongation as � � ��l l l l l l1 0 1 2 d , (5) we obtain � � � � � �u T u T u TT u, , ,� � �0 0 � � � � � � � � � �� � �� � � � � � T T u u T u uT T Tu u T T T ud d d dl l l l T uu T u� � � �� 0 � � . Keywords: expansion; linear; � �

• Physical and Electrical Properties of Yttria-Stabilized Zirconia Thin Films Prepared by Radio Frequency Magnetron Sputtering by Golosov, Dmitriy A.; Zavatskiy, Sergey M.; Melnikov, Sergey N. (2013) - 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: films; structures; ysz

• Microwave Drying of Textile Materials and Optimization of a Resonant Applicator by Pourová, M.; Vrba, J. (2006) - Rela- 5 Acta Polytechnica Vol. 46 No. 5/2006 Fig. 5: Tools for optimizing the microwave dryer a) b) Fig. 6: Dependence of electric field strength on distance � and relative permittivity �tex (tg� � 0.566), 3D (a) and 2D (b) display of the quantities tive permittivity and loss factor are decreasing with decreas- ing water content. Also the complex permittivity of dried textile is not constant during the proce- dure. Keywords: drying; fig; textile

• Assessment of external interface of autonomous vehicles by Orlický, Adam; Mashko, Alina; Mík, Josef (2021) - The results of such studies provide more versatile results with vehicle behaviour. The method presented in this paper contributes to the safety of a vehicle-pedestrian communication of autonomous vehicles and is a part of a research that shall further contribute to the design and assessment of external communication interfaces of AV in general. Keywords: behaviour; braking; communication; crossing; hmi; interface; pedestrian; road; subjects; vehicle

• Astronomy events at Aschaffenburg University to attract future students by Döhring, Thorsten; Stanik, Eva; Zeising, Sebastian; Meissner, Martin (2025) - Often, pupils do not know if they should dare to pursue a degree – and then decide against it without having experienced Aschaffenburg University from the inside. At Aschaffenburg University, in the “Experience Modules” of the project “School Contacts”, we show and discuss subject areas that are neglected in canon- ised school education – focused on “school subject knowledge” – and where the application relevance for pupils cannot be established well enough. Keywords: aschaffenburg; astronomy; figure; lecture; pupils; rocket; school; students; university

• Computer Insight into the Molecular Level of Heart Failure. What is the Role of NCX? by Fischer, M.; Mlček, M.; Konvičková, S.; Kittnar, O. (2008) - [8] as � � � � � � I t k t 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: activity; ca2; calcium; fig; heart; ncx; vol; � �

• Supersymmetry in the Quark-Diquark and the Baryon-Meson Systems by Catto, S.; Choun, Y. (2011) - n!(nr − n − 1)!(n+ l + 12 ( 1 2 br2 )n × { 1 +mr nζ−n−1∑ k=0 (−1)k(n+ l)!(2n+ l + 1)(nζ − n− 1)!(n − 1 2 )! 2(k + n+ 12 )! = ( (nr − 1)!(2l + 2)!(nr + l − 1 2 )! Keywords: color; representation

• Conductivity Measurements of Silverpastes by Dirix, M.; Koch, O. (2010) - 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 [S/m] σ σ @1.6 GHz @2.1 GHz @2.7 GHz Copper 5.53E7 5.35E7 5.65E7 07120902 5.89E+006 5.61E+006 5.43E+006 07120910 5.35E+006 4.98E+006 5.50E+006 07120913 4.42E+006 4.35E+006 4.48E+006 07120914 4.45E+006 4.47E+006 4.73E+006 07120915 4.40E+006 4.63E+006 4.62E+006 07120916 4.35E+006 4.68E+006 4.63E+006 07120917 5.50E+006 5.72E+006 5.67E+006 07120918 5.50E+006 5.50E+006 5.50E+006 5 Conclusion A T-resonator structure for measuring electrical con- ductivity has been realised for 500 MHz and 1.5 GHz. Keywords: conducting; conductivity; conductor; dielectric; resonator; � quarter; � �
• Corn starch doped with sodium iodate as solid polymer electrolytes for energy storage applications by Awang, Fatin Farhana; Hassan, Mohd Faiz; Kamarudin, Khadijah Hilmun (2021) - Cole-Cole plots for (a) 0 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: conductivity; electrolyte; figure; films; naio3; polymer; sodium; spe; starch; wt.%

• How to Protect Patients Digital Images/Thermograms Stored on a Local Workstation by Živčák, J.; Roško, M. (2010) - 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. [cit. 3–23–2010] http://www.ece.unh.edu/biometric/biomet/ public docs/Biometricsurveyfindings.pdf [6] Mullaney, J.: Biometric authentication a choice for banks. Keywords: attempts; authentication; fingerprint; fraud; frr; logon; total; user

• Estimation of Amount of Scattered Neutrons at Devices PFZ and GIT-12 by MCNP Simulations by Šíla, Ondrej; Kubeš, Pavel; Kravárik, Josef; Rezác, Karel; Klír, Daniel; Cikhardt, Jakub (2013) - Neutron energy spectrum in place of three scintillation probes in PFZ experimental setup We calculated neutron energy spectrum in three places where we put probes in our experimental setup. For estimating of neutron energy we use time-of- flight method. Keywords: device; figure; neutrons; pfz; setup

• N = 4, d = 1 Supersymmetric Hyper-Kähler Sigma Models and Non-Abelian Monopole Background by Bellucci, S.; Krivonos, S.; Sutulin, A. (2011) - In what follows, to make some expressions more transparent, we will use, sometimes, the following stereographic coordi- nates for the bosonic components of hypermultiplet (2.21) and tensor supermultiplet (2.14): q11 = e 1 2 (u−iφ)√ 1 + ΛΛ Λ, q21 = − e 1 2 (u−iφ)√ 1 + ΛΛ , q22 = ( q11 ) Indeed, from (2.17) and (2.23) one may get the fol- lowing expression for A: A = 1 f [ φ̇+ ∂ ∂va f(λσaλ̄)−Bav̇a ] , (3.6) where f = 1 |v| , and , B1 = − v2(v3 + |v|) (v21 + v22)|v| , B2 = v1(v3 + |v|) (v21 + v22)|v| , B3 = 0. (3.7) 16 Acta Polytechnica Vol. 51 No. 1/2011 Keywords: action; auxiliary; mechanics; supermultiplet; supersymmetric
• Five-dimensional N = 4 Supersymmetric Mechanics by Bellucci, S.; Krivonos, S.; Sutulin, A. (2011) - Next, we introduce the standard Poisson brackets for bosonic fields {π,Λ} = 1, { π̄,Λ } (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 qiα A (2.6), taking into account that they contain only five independent vari- ables. Keywords: action; bosonic; reduction; su(2; supersymmetric

• 31Lectures on Noncommutative Geometry by Sitarz, A. (2008) - Then, if � % is the completion of � to a free module we have: � � � � � � �& � & & & & & % %( ) ( ) �, so: � � � � � �& � & & & & % %( ) ( ) � and hence: © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 43 Acta Polytechnica Vol. 48 No. 2/2008 � � � �& � . Keywords: algebra �; b �; differential; function �; j �; k �; m �; mn �; module �; noncommutative; operator �; representation �; sin �; space �; x �; � d; � e; � f; � n; � p; � u; � v; � �

• Ultra Low-Dispersion Spectroscopy with Gaia and Photographic Objective Prism Surveys by Hudec, R.; Hudec, L.; Klíma, M. (2011) - 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 energy redistribution effect in the Gaia BP and RP spectra arising from contamina- tion by wings of the image profiles was mentioned and investigated by Straizys et al., 2006, Montegriffo et al., 2007, and Montegriffo, 2009. Keywords: dispersion; gaia; plates; prism; spectra
• Negative Chromatic Dispersion Generated by Introducing Curvature into Photonic Crystal Fiber by Lucki, M. (2007) - The electric fields of the fundamental modes of the structure (composed of the association of LP01 guided in the core and mode guided in the cladding), called supermodes, are then given by: � � � I I j zI� �exp , (3) � � � II II j zII� �exp , (4) where �i is the radial distribution, and �i is the propagation constant of the considered mode. 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. (6) Keywords: bending; curvature; dispersion; radius; wavelength; � �

• THE FIRST STARS by Whalen, Daniel J. (2013) - 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. Later simulation campaigns in the same vein revealed a much broader range of final masses for Pop III stars, 30 ÷ 300 M� [27], and that they could form as bina- ries in a fraction of the halos Keywords: apj; et al; iii; pop; stars

• Use of Grasses and Mixtures of Grasses for Energy Purposes by Andert, David; Frydrych, Jan; Gerndtová, Ilona (2012) - The optimum proportion of grass dry matter is from 35 to 50 % in the total d.m. On September 8, all grassland mixtures and grass species for biomass pro- duction were harvested. Keywords: grass; matter; variant; yield

• Adhesive Bonding of Aluminium Alloy A5754 by Epoxy Resins by Michalec, Ivan; Marônek, Milan (2013) - Results of shear tests of bonded joints. even after the heating was stopped. [5] Beevers, A., Steidler, S. M., Duordola, J., Coackley, M.: Analysis of stiffness of adhesive joints in car bodies. Keywords: adhesive; aluminium; hysol; joints

• CAN ONE REALLY STUDY CHAOS ANALYTICALLY? by Lee, M. Howard (2014) - 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: cycle; map

• Simple Numerical Model of Laminated Glass Beams by Zemanová, A.; Zeman, J.; Šejnoha, M. (2008) - u i e ( ) , ( ) , ( ) ( ) , ( )( ) ( ) , ( ) ( )� �N r N r , ( ) , , , , ( ) , ( ) ( ) , ( ) ( ) , ( u i e e w e w e e w e w e i w x x w x x� �N r N r � x 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 i ix u z x z w x x x w x ( ) ( ) ( ) ( ) ( )( ) ( , ) ( ) ( ) (� � � � d d x) , (2) which, when combined with the constitutive equations of each layer expressed in terms of Young’s modulus E and the shear modulus G: � �x Keywords: glass; � �

• Model of Customer Buying Behavior in the CZ Mobile Telecommunication Market by Grünwald, Ondrej (2012) - Price level was clearly the most common considera- tion that was chosen as the must-avoid level. A large proportion of respondents (91.6%) limited the tariffs acceptable to them to an average price of CZK635 46 Acta Polytechnica Vol. 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] 32 50 30 20 29 10 28 10 27 10 26 10 25 10 24 10 23 10 22 10 21 10 20 10 19 10 18 10 17 10 16 10 15 10 14 10 13 10 12 10 11 10 10 1091 0 81 0 71 0 61 0 51 0 41 0 31 0 21 0 11 0 Page 1 Figure 8: Distribution of tariff prices in screening sections. Keywords: b e; m b; m s; price; u m; u t
• Supply Chain in Electro-Energetics and Real Options by Drahovzal, O. (2006) - 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 The formula for calculating the value of the option to switch then has the following form: V P C� � (7) and the formula for calculating the total value of a connection has the following form: V V C n C t t n T E� � �� � 0 1 . Keywords: deviations; electricity; price; � �

• Search for a Correlation Between Radio Giant Pulses and VHE Photons of the Crab Pulsar by Lewandowska, N.; Elsäesser, D.; Mannheim, K. (2011) - Currently, no universal model is available for Crab radio GPs, since the Lyutikov model is only applicable to GIPs above 4 GHz, where the P2 com- ponent changes in its position by 10 degrees [1]. Within the framework of this report we give a review on radio GPs and present a new idea on how to examine the characteristics of this as yet not understood kind of pulsar emission. Keywords: gps; pulsar; radio; vol

• BOOTES Observation of GRB 080603B by 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. (2012) - 5 Conclusions The 0.6 m telescope BOOTES-2 in La Mayora ob- served the optical afterglow of GRB 080603B in three filters. References [1] Chandra, P., Frail, D. A.: GRB 080603B: PAIRITEL infrared detection. Keywords: 080603b; b-2; gcn; grb; jun
• INITIAL FOLLOW-UP OF OPTICAL TRANSIENTS WITH COLORES USING THE BOOTES NETWORK by Caballero-Garcia, Maria D.; Jelinek, M.; Castro-Tirado, A.; Hudec, R.; Cunniffe, R.; Rabaza, O.; Sabau-Graziati, L. (2015) - In spite of constituting the best tool for deep studies of individual targets, they are not properly suited for the discovery of optical transient sources. Observations of GRB optical counterparts. Keywords: bootes-2; colores; grb; optical; telescopes

• BETA CANTOR SERIES EXPANSION AND ADMISSIBLE SEQUENCES by Caalim, Jonathan; Demegillo, Shiela (2020) - Then, for small ε > 0, c∗1 = bα(γ + 1)− γ + εc = α(γ + 1) − γ = c1. Define IB := {n ∈ N ∪ {0} | sgn(B[n+ 1]) > 0} and CB := {γ ∈ R | βn+1T n(γ + 1)− γ /∈ Z for n ∈ IB}. Keywords: beta; expansion
• Cost-Effective Architectures for RC5 Brute Force Cracking by Buček, J.; Hlaváč, J.; Matušková, M.; Lórencz, R. (2005) - i i t� �( ) mod1 ; j j c� �( ) mod1 ; 2.3 Decryption The following decryption routine assumes that the array S contains the mixed key and that the ciphertext block is in registers A and B. for i r� downto 1 do B B S i� � �( [ ])2 1 � �A A� ; 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 Keywords: decryption; expansion; fig; key; rc5; � �

• Study of Concepts of Parallel Kinematics Machines for Advanced Manufacturing by Valášek, M.; Bauma, V.; Šika, Z. (2005) - 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. 3 Hybrid parallel kinematics machines In hybrid parallel kinematics machines, the DOFs of the machine are split into two parts, at least one of which is real- ized by the parallel kinematics concept. Keywords: concept; fig; kinematics; parallel
• Term Analysis – Improving the Quality of Learning and Application Documents in Engineering Design by Weiss, S.; Jänsch, J.; Birkhofer, H. (2006) - 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. So, different termini can be treated as one and the Potential Term List is reduced again. Keywords: concept; documents; list; termini; variations

• Mohr-Coulomb Failure Condition and the Direct Shear Test Revisited by Řeřicha, P. (2004) - The nor- mal and tangential traction components on the plane are � �� � � � �n n n n� �� 2 . � �� � �0 5 266 , c � 1 in the rendulic plane � �1 2� . Keywords: coulomb; plane; tan �; � z; � �

• Statistics of Electron Avalanches and Streamers by Ficker, T. (2007) - 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. (3) In this way the number of less populated avalanches in- creases and, as a consequence, deviations from the Furry distribution may occur. (ii) Multiplication of highly populated avalanches with mean populations � �nd j J �0 must be generated accord- ing to a fractal scenario of branching or partitioning like most fractals when going to smaller scales. Keywords: avalanches; fractal; vol; � �

• A Simplified Analysis of the Post-buckling Behavior of a Compressed Reinforcing Bar by Kabele, P. (2004) - Since axial straining of the central line is neglected [Assumption (4)], the strain can be expressed as: � � �� � , (1) where � denotes the local axis normal to and originating at the central line, and � is the curvature of the central line. On these sections, the rupture criterion is first satisfied at the most distant points with � �� ext . Keywords: bar; plastic; � �

• Indoor Air Quality Assessment Based on Human Physiology - Part 2. Limits by Jokl, M. V. (2003) - � � � [�g �m�3] we get for adapted persons, preferring again �p as it was with CO2, � �� ���TVOC � � � �46000 598 104ln .PD Keywords: g �; persons; range; � m; � p; � �

• LIE ALGEBRA REPRESENTATIONS AND RIGGED HILBERT SPACES: THE SO(2) CASE by Celeghini, Enrico; Gadella, Manuel; del Olmo, Mariano A (2017) - 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. Since R(θ) is unitary on L2[0, 2π] for any value of θ then R(θ) is also unitary on H due to the unitarity of S. Unitary operators leaving Φ invariant can be ex- tended to Φ× by the duality formula (1), i.e., 〈R(θ)F |f〉 = 〈F |R(−θ)f〉, ∀ |f〉 ∈ Φ, ∀F ∈ Φ×. Therefore, 〈R(θ)φ|f〉 Keywords: hilbert; m=−∞; rhs

• HIGHLY ACCURATE CALCULATION OF THE REAL AND COMPLEX EIGENVALUES OF ONE-DIMENSIONAL ANHARMONIC OSCILLATORS by Fernández, Francisco Marcelo; Garcia, Javier (2017) - − 2E4 − 23E3 − 602E2 + 1030E − 1412), (8) H0 2 (E) = 1 4465125(E + 9)(E5 − 9E4 − 187E3 − 8217E2 + 78336E − 348624), (9) In this section we also calculate several resonances supported by anharmonic oscillators that were not taken into account by those authors. Keywords: eigenvalues; resonances
• How Do Energies Complexify? by Bíla, H. (2007) - d discussed in [11] with ��-symmetric boundary conditions(9) � � � �� �( ) ( ) ( )0 c E , therefore one needs to solve the differential equation 0 � � � � �d d Keywords: -symmetric; complexification; eigenvalues; square; � �

• THE INFLUENCE OF SIZE FRACTION ON THE COMPRESSIBILITY OF PINE SAWDUST AND THE EFFECTIVENESS CRITERION FOR DENSIFICATION by Matúš, Miloš; Križan, Peter; Kováčová, Monika; Beniak, Juraj (2014) - The basic parameter describing the densification process of particulate matter is its compressibility, quantified by the coefficient of compressibility. Raw material (dendro- mass or phytomass) treated in this way has properties similar to those of particulate matter. Keywords: compressibility; densification; fraction; matter; particulate; sawdust

• New Abrasive Materials and Their Influence on the Surface Quality of Bearing Steel After Grinding by Jusko, Ondrej (2012) - Figure 4 shows, that when a conventional wheel and an innovative type of abrasive grinding wheel are used with decreasing cut depth, thus reducing the radial feed rate, the roundness deviation also de- creases. A B-VII B64 K75 grinding wheel was used. Keywords: grinding; wheel

• MINIMAL NON-INTEGER ALPHABETS ALLOWING PARALLEL ADDITION by Legerský, Jan (2018) - 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: a[β; addition; integer; parallel; z[β

• EXTERNAL ROLLING OF A POLYGON ON CLOSED CURVILINEAR PROFILE by Kresan, Tetiana; Pylypaka, Serhii; Ruzhylo, Zynovii; Rogovskii, Ivan; Trokhaniak, Oleksandra (2020) - According to the obtained equations, curvilinear profiles with different numbers of their elements are constructed. Keywords: Equilateral polygon, curvilinear profile, external rolling, differential equation, centroids. Keywords: curve; curvilinear; number; polygon; profile; rolling; square

• FACTOR AND PALINDROMIC COMPLEXITY OF THUE-MORSE’S AVATARS by Frougny, Christiane; Klouda, Karel (2013) - 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: complexity; factor; word

• A Simulation Study for Computing the Emissivity of Clouds by Seker, S.; Aydemir, M. E.; Apaydin, G. (2003) - No. 3/2003 A Simulation Study for Computing the Emissivity of Clouds S. Seker, M. E. Aydemir, G. Apaydin In fhis sttrdy, prnpagativn through uarious dirrriburiorc of loxy particles in clouds is investigated,. The bistatic scatlering patterns and emissiuities of uariorn $pes of clouds are cornputed for waaes of selected polarizations passr,ng through clouds with specifld sizes, shapes and distributions. Keywords: cloud; cylinders; emissivity; fig; patterns; scattering

• Root Asymptotics for the Eigenfunctions of Univariate Differential Operators by Shapiro, B. (2010) - d3 dz3 ; T2 = (z − I)(z + I)(z − 2 + 3I)(z − 3− 2I) d4 dz4 ; T3 = (z − I)(z + I)(z − 2 + 3I)(z − 3− 2I) (z + 3) d5 dz5 ; T4 = (z2 + 1)(z − 2 + 3I)(z − 3− 2I)(z + 3) (z + 1 + I) d6 dz6 of the form Q(z) dk dzk where Q(z) is a monic polyno- mial of degree k + 1. 77 Acta Polytechnica Vol. 50 No. 5/2010 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1 0 0.5 1 1.5 2 2.5 3 -3 -2 -1 0 1 2 Keywords: polynomial; root

• MULTILAYER COATINGS Ti/TiN, Cr/CrN AND W/WN DEPOSITED BY MAGNETRON SPUTTERING FOR IMPROVEMENT OF ADHESION TO BASE MATERIALS by Horník, Jakub; Krum, Stanislav; Tondl, David; Puchnin, Maxim; Sachr, Pavel; Cvrček, Ladislav (2015) - 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: adhesion; coatings; hardness

• Psychoacoustic Properties of Fibonacci Sequences by Sokoll, J.; Fingerhuth, S. (2008) - 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: binary; fibonacci; fig; sequence; � �

• Pumping Efficiency of Screw Agitators in a Tube by Rieger, F. (2002) - [J kg�1] e* dimensionless specific energy, e* � e/�n e *max maximum dimensionless specific energy e+ dimensionless specific energy, e+ � e /n2d2 emax � maximum dimensionless specific energy L length The effect of Reynolds number on pumping characteristics was shown in [1]. Keywords: number; pumping

• Capillary Discharge Parameter Assessment for X-ray Laser Pumping by Hübner, J. (2010) - 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; imax; maximum

• Physics on the Terascale (extended abstract) by Engelen, J. (2010) - 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. Moreover, experiments able to cope with the in- teraction rate at this energy needed new concepts in detector technology and on-line selection of poten- tially interesting events (‘triggering’). Keywords: higgs; lhc; magnets

• Influence of Climatic Cycles on Properties of Leadfree Solders by Tučan, M.; Žák, P. (2010) - 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: fig; leadfree; shocks; solder
• A Study of the Interface of Soldered Joints of SnInAgTi Active Solder with Ito Ceramics by Provazník, M.; Koleňák, R. (2010) - Keywords: ultrasonic activation, active solder, ITO (indium-tin oxide) ceramics. 3 Experiment results A differential thermic analysis was made on a sam- ple of active solder. Keywords: ceramics; fig; ito; solder; soldering

• Case study: Dosimetric comparison of VMAT, IMRT and 3DCRT techniques for left-sided breast cancer treated in deep inspiration breath-hold by Hanušová, Tereza (2023) - Other stud- ies have shown that the heart can be better spared with 3DCRT techniques 63 no. 2/2023 Case study: Dosimetric comparison of VMAT, IMRT and 3DCRT techniques Evaluated parameter 3DCRT IMRT VMAT1 VMAT2 Spinal cord Dmax Keywords: dose; imrt; patient; ptv; technique; vmat

• The Intriguing Nature of the Cataclysmic Variable SS Cygni by Giovannelli, F.; Sabau-Graziati, L. (2012) - 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: cvs; cyg; dwarf; et al; giovannelli; ss cyg; white

• Flexible Multi-Electrode Array for Medical Applications by Winkin, Nadine; Mokwa, Wilfried (2012) - Figure 4: Dummy stimulator chip (schematic). Keywords: flexible multi-electrode array, thinned silicon chip, electrical stimulation, retinal implant. Keywords: chip; electrodes; fig; figure; mea; polyimide

• Nanoelectronic Device Structures at Terahertz Frequency by Horák, M. (2004) - q p � � � � � � � � � � � 1 0 0 0 0 0 0 0 0 2 ac B �� ( ) cos( ) � � � � � � � sin( ) ( ) cos( ) sin( p x k p p x i p k q p 0 0 0 1 0 0 0 0 B B p x� � � � � � � � � � � � � � � 1 B) . (13) For a rectangular barrier we obtain f x e g x e p m E Uip x ip x( ) , ( ) , ( )max� � � ��0 0 0 2 � (3) where p0 is real for E U� max (this corresponds to the electron emission over the barrier) and p0 is imaginary, p i0 0� � for E U� max (electron tunneling through the barrier). Keywords: barrier; e �; function �; max �; p �; t t; t �; � b; � c; � �

• Fractal Dimension Estimation in Diagnosing Alzheimer’s Disease by Hubata-Vacek, Václav; Kukal, Jaromír; Rusina, Robert; Buncová, Marie (2013) - Dimension estimates via various entropy estimates. Estimated entropies from a limited data set are always biased. Keywords: entropy; estimates

• Reliability - Based Designof Precast Buildings by Kalousková, M.; Novotná, E.; Šejnoha, J. (2001) - The corresponding stiffness matrix [KBT] of the equiva- lent beam and truss element (see Fig. 5) is given by � � � � � �K E A h E I E 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: b c; c c; fig; joints; � �

• System for 3D Visualization of Flaws for Eddy Current Inspection by Dočekal, A.; Kreidl, M.; Šmíd, R. (2006) - 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: flaw; probe; � �

• UNRRA and Support for Science by Frydryšková, J. (2008) - 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; program; unrra; war

• Strontium As a Structure Modifier for Non-binary Al–Si Alloy by Stunová, Barbora Bryksí (2012) - Oc- casionally there are skeletal particles of magnesium phase Mg2Si, always tied to the eutectic silicon or iron phase. Find- ings of authors in recent years [2–6] show, that mod- ification elements, including strontium, besides the change in morphology of eutectic silicon, also affect intermetallic phases. Keywords: eutectic; iron; magnesium; modification; morphology; phases; strontium

• Frequencies of letters in infinite k-balanced sequences by Dvořáková, L’ubomíra; Pelantová, Edita (2025) - Keywords: Letter frequency, balanced sequences, balancedness threshold, factor complexity. i < kn + n : ui = a} n exists and is the same for any choice of (kn)n∈N. The definition of letter frequency in the introduction is restricted to the study of the limit for the sequence (kn) = (0). Keywords: frequencies; letter; sequence

• A Simple Cache Emulator for Evaluating Cache Behavior for SMP Systems by Šimeček, I. (2006) - � External HW CPU cache monitors are very expensive and platform-dependent. © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ 47 Czech Technical University in Prague Acta Polytechnica Vol. 46 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: cache; memory; smp

• Properties and Performance of a New Compact HF Aerial Design for Multi-Band Operation by Telfer, D.; Spencer, J. (2005) - In practice, matching may be achieved using an ATU, e.g., at the transmitter end, but it is 14 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 45 No. 4/2005 Czech Technical University in Prague a) b) c) d) e) f) Fig. 5: a) FF pattern at fd for DM aerial of Fig. 10: a) SWR plot, 7 to 7.1 MHz for DM aerial of Fig. 3, Zi � 50 ohms at 7.05 MHz; b) SWR spectrum, 5 MHz to 30 MHz for the DM aerial of Fig. 3, for Zi � 50 ohms at 7.05 MHz; c) predicted SWR spectrum, range 5 MHz to 30 MHz, of the BFDM aerial in Fig. Keywords: aerial; fig; mhz; nvis; pattern

• On Deterministic Chaos in Microdischarge Phenomena by Ficker, T. (2005) - For this purpose the series of heights (amplitudes) � �Ui i N �1 was rear- ranged into a sequence of d-dimensional pseudo-vectors �(d) 44 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 45 No. 6/2005 � (1) Between the i-th and j-th pseudo-vectors �i(d) and �j(d) there is a scalar separation �� �i j Keywords: adobe; pdf; � �

• Numerical Simulation of Nanoscale Double-Gate MOSFETs by Stenzel, R.; Müller, L.; Herrmann, T.; Klix, W. (2006) - If equations (10) and (11) are neglected, i. e., for �p � �n � 0, the QHD model can be re- duced to the conventional hydrodynamic (HD) model. If the carrier temperatures are set to lattice temperature and equations (6) to (9) are neglected, the quantum drift diffusion (QDD) model and additionally for �p � �n � 0 the conven- tional drift diffusion (DD) model can be obtained. Keywords: fig; gate; � �

• 3D Surface-based Detection of Pleural Thickenings by Faltin, P.; Chaisaowong, K. (2011) - To evaluate the results, we measure both the totally de- tected volume of all thickenings, and the number of detected thickenings, for each patient. It evolves from pleural thickenings which are a typical long-term effect of asbestos exposure. Keywords: convex; hull; lung; thickenings

• Ito-Sadahiro numbers vs. Parry numbers by Masáková, Z.; Pelantová, E. (2011) - = (−x)m+1 p−1∑ i=0 (−x)i + ( (−x)p − 1 ) (x − β) · m∑ i=2 Ti−1(−x)m−i + (10) (x − β) p∑ i=1 Tm+i−1(−x)p−i −( (−x)p − 1 ) βT0(−x)m−1 + Tm − Tm+p . First realize that Tm − Tm+p = 0, since d−β(lβ) is eventually periodic with a preperiod of length m and a period of length p. We call such numbers β Ito-Sadahiro numbers, and we compare their properties with those of Parry numbers, which occur in the same context for the Rényi positive base numeration system. Keywords: ito; number; sadahiro

• The Velocity Tensor and the Momentum Tensor by Lanczewski, T. (2011) - Keywords: relativistic classical mechanics, velocity tensor, momentum tensor. Then matrix (19) takes the form Π(β) = γ2 ( Π00 Π01 Keywords: tensor
• CONSTRAINING SPACETIME TORSION WITH THE MOON, MERCURY AND LAGEOS by March, Riccardo; Bellettini, Giovanni; Tauraso, Roberto; Dell’Agnello, Simone (2013) - As a consequence, spacetime torsion would be observation- ally negligible in the solar system. Gravitational forces are due entirely to spacetime torsion and not to curvature. Keywords: precession; tensor; torsion

• Fractality of Electrostatic Microdischarges on the Surface of Polymers by Ficker, T.; Kapička, V.; Macur, J.; Slavíček, P.; Benešovský, P. (2004) - 4–6 in which the increasing linear dependence D aU b� � is well recognisable. 1: Lichtenberg figures generated at 8 kV and 30 min., (D � 1.486, sample no. 27) termined. Keywords: electret; figures; forming; lichtenberg; � �

• On an Algorithm for Multiperiodic Words by Holub, Štepán (2013) - This can be succinctly stated as: FW(P, k)[i] =  FW(Q, k −m)[i mod m] if (i mod m) < k −m; If k ≤ m, then Lemma 2 gives FW(P, k) = 0 · 1 · · · (k− 1). Keywords: word
• BIPERIODIC FIBONACCI WORD AND ITS FRACTAL CURVE by Ramírez, José Luis; Rubiano, Gustavo Nevardo (2015) - Keywords: Fibonacci word, biperiodic Fibonacci word, biperiodic Fibonacci curve. The words fn are called finite Fibonacci words. Keywords: f(a; fibonacci; word

• ITINERARIES INDUCED BY EXCHANGE OF TWO INTERVALS by Masáková, Zuzana; Pelantová, Edita (2013) - 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: interval; return

• Various Properties of Sturmian Words by Baláži, P. (2005) - Using this fact we can write ��� � � � � � ��, ( , ] { : }� � � � � �1 x n n n Zn , thus the elements of �� � � �, ( , ]�1 form an increasing se- quence ( )xn n Z� . � is a Sturm number, 2. � ��Q( ), 3. � � � � � �� � �1 or 1 � � � � � �� � � , where �� is the image of � under the Galois automorphism of the quadratic field Q( )� . Keywords: s �; sturmian; w �; words; x �; z �; � �
• Return Words and Recurrence Function of a Class of Infinite Words by Balková, L’. (2007) - For b �1and 2 3� �a , then it holds for l(k), k � �, l a( )1 1� � , l( )2 5� , l k n a( ) ( )� � 10 , for S k Sn n 1 0 11 1 0 0( ) ( )( , ) ( , )� � � , n � �, l k n( ) ( )� � 00101 for S k Sn n 0 1 1 10 0 1 1( ) ( )( , ) ( , )� �� � , n � �. A factor w u� �( ) is called singular if w �1 or if there exist a word v u� �( ) and letters x x y y, , ,� � �� such that w xvy� , x x� �, y y� �, and � � �x vy xvy u, ( )� . Keywords: b �; u �; words; � �

• Statistical Distributions of Electron Avalanches and Streamers by Ficker, T. (2010) - As a consequence of this condition, one can find J dmax � � �� 1 0and, in addition, N d� �exp( exp( )� �� . Assuming linear proportionality u c n� � , the curve w u c u D 1 0 1( ) ( )� � � � will preserve the same shape as w n1( ), i.e. they will both possess the same slope� �( )1 D . Keywords: avalanches; statistics; vol; � �

• Wireless Telegraphy at the German Universal Exhibition in Ústí nad Labem in 1903 [1] by Okurka, T. (2008) - 40 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 48 No. 3/2008 Wireless Telegraphy at the German Universal Exhibition in Ústí nad Labem in 1903 [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: exhibition; labem; nad; wireless

• The ATLAS Experiment Entering into Operation: Overview, Motivation and Status of the Project (extended abstract) by Jenni, P. (2010) - The ATLAS Collaboration, ‘The ATLAS Experiment at the Large Hadron Collider’, JINST 3 (2008), S08003. A general overview of ATLAS, one of the key exper- iments, has been given. Keywords: atlas; overview

• A note on entanglement classification for tripartite mixed states by Zhao, Hui; Liu, Yu-Qiu; Wang, Zhi-Xi; Fei, Shao-Ming (2022) - − T 1|23 2 ( ∑ pi|φi⟩⟨φi|)∥tr ≤ ∑ pi∥T 1|23 1 (|φi⟩⟨φi|) − T 1|23 2 (|φi⟩⟨φi|)∥tr, namely, ∥T 1|23 1 (ρ) − T 1|23 2 (ρ)∥tr ≤ √ 6. (2) If ρ = |φ⟩⟨φ| is 2|13 separable, we have |φ2|13⟩ = |φ2⟩ ⊗ |φ13⟩ ∈ H2 2 ⊗ H6 13, where H6 13 = H2 1 ⊗ H3 3 . For any mixed state ρ =∑ pi|φi⟩⟨φi| ∈ H2 1 ⊗H2 2 ⊗H3 3 , ∑ pi = 1, 0 < pi ≤ 1, we have: (1) If ρ is 1|23 separable, then ∥T 1|23 1 −T 1|23 2 ∥tr ≤ √ 6; (2) If ρ is 2|13 separable, then ∥T 2|13 1 −T 2|13 2 ∥tr ≤ √ 6; (3) If ρ is 3|12 separable, then ∥T 3|12 1 −T 3|12 2 ∥tr ≤ √ 3. Proof (1) If ρ = |φ⟩⟨φ| is 1|23 separable, we have |φ1|23⟩ = |φ1⟩ ⊗ |φ23⟩ ∈ H2 1 ⊗ H6 23, where H6 23 = H2 2 ⊗H3 3 . Keywords: entanglement; separable; t0t1

• Antipalindromic numbers by Dvořáková, Ľubomíra; Kruml, Stanislav; Ryzák, David (2021) - 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; base; number

• LARGE AREA HODOSCOPES FOR MUON DIAGNOSTICS OF HELIOSPHERE AND EARTH’S MAGNETOSPHERE by 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. (2013) - Keywords: cosmic rays, muons, muon hodoscope, angular variations of muon flux, solar, terrestrial connections, heliosphere, magnetosphere. To carry out muon diagnostics, special detectors – muon hodoscopes – which can detect muons from any direction with good angular resolution in real-time mode are required. Keywords: jul; muon; uragan; variations

• ON TWO WAYS TO LOOK FOR MUTUALLY UNBIASED BASES by Kibler, Maurice R. (2014) - Keywords: finite-dimensional quantum mechanics, quantum information, MUBs, SIC POVMs, equiangular lines, equiangular vectors. 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 Cd2 (cf. Keywords: d−1∑; vectors

• Experimental Analysis of Sandstone and Travertine by Doležel, T.; Drdácký, M.; Konvalinka, P.; Kopecký, L. (2004) - 90 © Czech Technical University Publishing House http://ctn.cvut.cz/ap/ Acta Polytechnica Vol. 44 No. 5–6/2004 Fig. 3: EDAX point analysis of the chlorite group minerals in the cement matrix of the rocks. Keywords: sandstone, travertine, EDAX point analysis, microscopic analysis, stress-strain diagram in compression, modulus of elasticity. Keywords: fig; sandstone; travertine

• Gravitomagnetism (extended abstract) by Bičák, J. (2010) - 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 origin of inertia is false: Gravitomagnetic effects are also caused by gravitational waves. One has to realize that the physical effects associated with 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. Keywords: inertial; mach; principle

• A Finite Liouville Dress for c by Furlan, P.; Petkova, V. B.; Stanishkov, M. (2010) - = − 4 sinπb ( β1 − σ1 − σ2 + b 2 ) = λ 1 2b (Q−2β) L Sb(2β −Q)∏ s=± Sb(β + s(σ2 + σ1 −Q))Sb(β + s(σ2 − σ1)) , where Sb(α) = Γb(α)/Γb(Q− α) Keywords: correlator; liouville

• Rectifiable PT -symmetric Quantum Toboggans with Two Branch Points by Znojil, M. (2010) - 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. 3.2 Sequences of critical points An inspection of Figures 2 and 3 and a comparison with Figures 4 and 5 reveals that one should expect the emergence of sudden changes of the winding de- scriptors � during a smooth variation of the shift Re x Im x –6 –4 –2 –4 –2 2 Fig. Keywords: tobogganic; vol

• More on PT-Symmetry in (Generalized) Effect Algebras and Partial Groups by Paseka, J.; Janda, J. (2011) - We then have A + B = A + C. It follows again by (Gii) that C/D(A) is bounded and B/D(A) + y = y + x, Keywords: d(a

• THE PAST AND THE FUTURE OF DIRECT SEARCH OF GW FROM PULSARS IN THE ERA OF GW ANTENNAS by Milano, L.; Calloni, E.; De Rosa, R.; De Laurentis, M.; Di Fiore, L.; Garufi, F. (2013) - Figure 1 shows that the great majority of known pulsars (green diamonds) are below the present sen- sitivity curves of the LIGO and Virgo GW anten- nas, and only a few of them (shown in cyan) fall in the range of sensitivity of either Advanced LIGO or Advanced Virgo or in the range of the Einstein Telescope Hirakawa et al. Keywords: ligo; pulsars; virgo

• Mixing Suspensions in Slender Tanks by Rieger, F.; Rzyski, E. (2002) - 3: Effect of increasing the number of impellers (particles � � 1.34 mm, tank H � D): a – values of rotational frequency of impellers; b – values of mixing power (A – one impeller; B – two impellers, = 0.5 d; C – two impellers, = d) (Figs. 4a and 4b). In the tank there were four standard baffles and a pitched four-blade impeller (� � 45°). Keywords: fig; impellers; � �

• AN AIRPLANE WITH UNCONVENTIONALLY PLACED PROPELLER POWER UNIT by Červinka, Jan; Kulhánek, Robert; Pátek, Zdeněk (2017) - 1/2017 An Airplane with Unconventionally Placed Propeller Power Units ������������ CeC ����C��� ������������ CeC ����C�� ������������ CeC ����C����� ���CRrCeC ����C��� ���CRrCeC ����C�� � � �nrR �nrn0. The increment 4CL0 ≈ � � �I �TVo T TVo I IVo A −�� �IT T IT AT ��������������−O−�����−��� ��������������−O−�����−�� ��������������−O−�����−����� �� V−I−O−�����−��� �� V−I−O−�����−�� �� V−A−O−�����−��� �� V−A−O−�����−�� Figure 5. Keywords: ipi �; nrr �; propellers; − �; � c; � cec; � crrcec; � ofipi; � −; � �

• ALGEBRAIC DESCRIPTION OF SHAPE INVARIANCE REVISITED by Ohya, Satoshi (2017) - d dx − j x + g j . For fixed j ∈ { 1 2 , 3 2 , · · · , νmax}, the energy eigenvalues and eigenfunctions are given by En = −(j + n)2 − g2 (j + n)2 , n ∈ {0, 1, · · · , N}, (4.11) and ψEn,j(x) ∝ 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). Keywords: kepler

• A METHOD OF COMPLEX CALCULATION OF RATIONAL STRUCTURAL PARAMETERS OF RAILWAY HUMPS by Panchenko, Sergii; Ohar, Oleksandr; Kutsenko, Maksym; Smachilo, Julia (2018) - Ix = 0; Ix − 50 = 0; I1 − I2 − 25 = 0, V YRP en − V YRP en(max) = 0;T0 − Tmax 0 = 0; (37) (3.) − w0 − wrol(1) Keywords: hump; yrp

• Editorial: FAREWELL AND WELCOME NEW EDITOR-IN-CHIEF by Adlerová, Iva (2018) - 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 My seven years with Acta Polytechnica ended on June 30. Keywords: polytechnica

• Design and Properties of Octaslide Redundant Parallel Kinematics by Bauma, V.; Valášek, M.; Šika, Z. (2004) - 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. The design process follows the newly developed design methodol- ogy for parallel kinematics machines. Keywords: fig; octaslide

• MODELING OF FLOWS THROUGH A CHANNEL BY THE NAVIER–STOKES VARIATIONAL INEQUALITIES by Kračmar, Stanislav; Neustupa, Jiří (2021) - Substituting this to the first term in (16), we obtain∫ T 0 〈 ∂tw,w − v 〉 dt = ∫ t∗ 0 〈 ∂t(v∗ext + αu), (α− 1)u 〉 dt + ∫ t∗+δ t∗ 〈 ∂t(v∗ext + ηu), (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− ∫ t∗+δ t∗ 〈 η̇u, u 〉 dt − ∫ t∗+δ t∗ 〈 η ∂tu, u 〉 dt = ∫ t∗+δ 0 (η − 1) 〈 ∂tv ∗ ext, u 〉 dt + α(α− 1) 2 ( ‖u(t∗)‖22 − ‖u(0)‖22 ) + 1 2 ( ‖η(t∗ + δ)u(t∗ + Considering δ → 0+, we get∫ T 0 〈 ∂tw,w − v 〉 dt = (α− 1) ∫ t∗ 0 〈∂tv∗ext, u〉 dt + α2 − 1 2 ‖u(t∗)‖22 − α(α− 1) 2 ‖u(0‖22. Keywords: v∗ext; ∫ t∗

• NOTE ON THE PROBLEM OF MOTION OF VISCOUS FLUID AROUND A ROTATING AND TRANSLATING RIGID BODY by Deuring, Paul; Kračmar, Stanislav; Nečasová, Šárka (2021) - Let S > 0 with Ωc ⊂ BS , R ∈ [2S,∞), F ∈ L6/5(ΩR)3, b ∈ H1/2(∂Ω)3. 1≤k≤3 for x ∈ ∂BR, R ∈ (0,∞) with D ⊂ BR, u ∈W 2, 6/5(ΩR)3, π ∈W 1, 6/5(ΩR). Keywords: theorem

• Micromechanics Based Inelastic and Damage Modeling of Composites by Procházka, P. P. (2004) - The Lippman-Schwinger equation has the form: � �� � � � � � � �( ) ( ) ) (40) It is worth noting that the stress concentration factor can be derived in the same way: � �� � ��B � � �f m (41) Keywords: y y; šejnoha; � f; � l; � r; � �

• PŘEDMLUVA by Bodnár, Tomáš; Dvořák, Rudolf (2021) - 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. Byl dlouholetým členem a později i vedoucím Ústavu technické matematiky na Fakultě strojní ČVUT v Praze. Keywords: jeho; kozel; matematiky; pak; profesor; ústavu; čvut

• The Spherically Symmetric a2–dynamo and Some of its Spectral Peculiarities by Günther, U.; Kirillov, O. N.; Samsonov, B. F.; Stefani, F. (2007) - [u u [u u u u u m n n mn m n n n n � � � � � � � � � � � � � , ] , , ] , , : , 2 0� � �� � � � � (7) and correspond to eigenvalue branches � � �� �� n n n� � 0 which scale linearly with �0. From the domain �( )†A� of the adjoint operator �� �( ) � � ( , ) ( , ) �(†A u u� � � � �L L r2 201 01 �0 0) , � �� Bu r� �1 0� , �: � � u � � � � � � u u 1 2 , (4) � : ( ) B � �� � � � � � � � �r r l r r 0 1 , one reads off that � �( ) ( )†A A� �� and, hence, the dynamo operator itself is not self-adjoint even in a Krein space. Keywords: dynamo; l �; r �; u �; vol; � -profile; � �

Epilogue

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Created: 2025-12-27