1. |
THE ORGANIC THERMISTOR BOLOMETER |
|
Canadian Journal of Research,
Volume 24a,
Issue 6,
1946,
Page 93-102
C. D. Niven,
Preview
|
PDF (532KB)
|
|
摘要:
When heat radiation falls on a thin sheet of cellophane painted on each side with aquadag, the electrical conductivity measured through the sheet changes sufficiently that the cellophane can be used as the sensitive element in a bolometer. Since the electrical conductivity of the cellophane depends largely on the moisture content, it was found necessary to attach a small tube containing calcium chloride to the bolometer to act as a humidistat. D-c. amplification was employed. When the bolometer was used with a 10 in. front-silvered concave mirror, the apparatus could detect the heat radiated from a man's face at 100 yards.
ISSN:1923-4287
DOI:10.1139/cjr46a-008
出版商:NRC Research Press
年代:1946
数据来源: NRC
|
2. |
PERMEABILITY STUDIES: I. SURFACE AREA MEASUREMENTS USING A MODIFIED KOZENY EQUATION |
|
Canadian Journal of Research,
Volume 24a,
Issue 6,
1946,
Page 103-116
J. C. Arnell,
Preview
|
PDF (642KB)
|
|
摘要:
The Kozeny equation for the determination of surface areas by the gas-permeability method has been modified by the introduction of a second term, which takes the form of the Knudsen flow equation. This modified equation gives consistent results for the specific surface of a granular bed of fine particles with mean pressures of the flowing gas ranging from 2.6 cm. to almost atmospheric pressure. The results obtained from experimental data are in agreement with those calculated by direct visual and electron microscope counting.
ISSN:1923-4287
DOI:10.1139/cjr46a-009
出版商:NRC Research Press
年代:1946
数据来源: NRC
|
3. |
ÉTUDES SUR LES NEUTRONS LENTS |
|
Canadian Journal of Research,
Volume 24a,
Issue 6,
1946,
Page 117-141
Pierre Demers,
Preview
|
PDF (1046KB)
|
|
摘要:
not available
ISSN:1923-4287
DOI:10.1139/cjr46a-010
出版商:NRC Research Press
年代:1946
数据来源: NRC
|