Sorption and diffusion of water vapor in polyimide films

1992 ◽  
Vol 30 (11) ◽  
pp. 1223-1231 ◽  
Author(s):  
Ken-Ichi Okamoto ◽  
Nozomu Tanihara ◽  
Hitoshi Watanabe ◽  
Kazuhiro Tanaka ◽  
Hidetoshi Kita ◽  
...  
Keyword(s):  
Water Vapor ◽  
Polyimide Films ◽  
And Diffusion

Sorption and diffusion of carbon dioxide in polyimide films

1988 ◽  
Vol 35 (6) ◽  
pp. 1497-1509 ◽  
Author(s):  
E. Sada ◽  
H. Kumazawa ◽  
P. Xu
Keyword(s):  
Carbon Dioxide ◽  
Polyimide Films ◽  
And Diffusion

Permeametric and microgravimetric studies of sorption and diffusion of water vapor in an unsaturated polyester

Polymer ◽  
2000 ◽  
Vol 41 (7) ◽  
pp. 2667-2676 ◽  
Author(s):  
S. Marais ◽  
M. Métayer ◽  
T.Q. Nguyen ◽  
M. Labbé ◽  
L. Perrin ◽  
...  
Keyword(s):  
Water Vapor ◽  
Unsaturated Polyester ◽  
And Diffusion

scholarly journals A Novel Method for Prediction of Attenuation of Millimeter Waves by Fog and Smoke

2019 ◽  
Vol 8 (3) ◽  
pp. 2080-2085
Keyword(s):  
Wave Propagation ◽  
Water Vapor ◽  
Radio Wave ◽  
Millimeter Wave ◽  
Millimeter Waves ◽  
The Other ◽  
Radio Waves ◽  
Weather Phenomenon ◽  
Novel Method ◽  
And Diffusion

Terrestrial radio wave link faces various challenges like attenuation caused by gases, water vapor and other weather phenomenon like rain, storms, snow, fog, cloud etc. These challenges are responsible for absorption and diffusion of energy. Another kind of obstacles observed by the radio waves on terrestrial path is vegetation, lamppost, grills and other urban constructions. Different phenomenon is studied under these conditions like reflection, diffraction, refraction, scattering, depolarization etc. In case of millimeter waves various propagation studies has been performed under different scenarios. More propagation studies are needed to be done especially for fog. In this paper radio wave propagation studies are performed for fog using proposed fog model and results are compared with the other model proposed in the Literature. Another propagation study is performed for smoke which is unique of its kind. This study indicates that even smoke can causes attenuation for millimeter wave frequencies.

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