id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ap-304	Ficker, T.; Podešvová, Z.	Non-isothermal Diffusion of Water Vapour in Porous Building Materials	2002	3	.pdf	application/pdf	1717	63	62	For this purpose the coefficient of diffusion permeability � is defined as follows � �� T g d p p * � � d 1 2 (1), T T T * � �1 2 2 (2) where d is the thickness of the envelope (wall), gd is diffusion flux and p1, p2 are partial pressures of water vapour at both surfaces of the wall. � � � � � � d ddp T g R k a bx xn x p T p x T x � � � � � � ��� � 01 1 , (12) � � � � � � � � � g p T p T kb n R a a bx x x n nd � � � � � � � � � �� � 1 1 1 1 1 � .	cache/ap-304.pdf	txt/ap-304.txt