cover image: Indian Journal of Physics and Proceedings of the Indian Association for the Cultivation of Science  May 1953

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Indian Journal of Physics and Proceedings of the Indian Association for the Cultivation of Science May 1953

1953

Since the ratio of dielectric constant of water and that of the fibre substance is very high (about 80 : 1.8) and the dielectric constant of water decreases with decrease in the freedom of movement of the Molecules one would except that the dielectric constant will be very sensitive to the presence of water and of the two states of water inside the fibres the free moisture would affect it by a [...] The fibre samples used in the the present investigation undoubtedly possess varying proportions of polar groups in the hydroxyls and the carboxyls of the constituents as well as in the associated water molecules the moment and the freedom of motion of the dipole in each sample being different. [...] In the present paper the possible existence of associations between the atmospheric pressure variations on the one hand and the variations of the semithickness and the critical frequency of the F2-layer and the average day time and night time ionization densities of the E-region on the other is examined afresh by statistical analysis of the records of the meteorological and ionospheric data of C [...] By the principle of 'threshold detector' the initial radioactivity of the end product in each case is a measure of the average cross section of the (n p)-reation over a narrow band of neutron-energy between the threshold of the reaction and the upper limit of the effective neutron-energy for capture. [...] dE Et where no is the number of nuclei of the species to be activated by the neutrons in the target ; (n p) denotes the cross section of the (n p) reaction for the neutrons of energy E to which the activity A is due F(E) is the neutron flux in the energy range E and E-}-dE.
technology medicine science
Pages
64
Published in
India
SARF Document ID
sarf.120085
Segment Pages Author Actions
Frontmatter
i-iii K. Banerjee, S.K. Mitra, D.M. Bose view
Moisture-Sensitivity of Dielectric Constant of Jute and Cotton
223-234 B.L. Banerjee view
Correlation Between Variations of Surface Pressure and Ionospheric Parameters
235-243 M.R. Kundu view
Relative Cross-Sections of (n p) Reactions in Sulphur 32 and Phosphorus 31
244-250 N.K. Saha, M. Choudhury view
Electronic Spectra of Molecules Containing Six and Five Membered Rings Calculation of Energy Levels
251-256 G. Viswanath view
Oblique Propagation of Radio Waves Over A Curved Earth
257-268 B. Chatterjee view
Effect of Steepness of Pulse Fronts on the Response of Differentiating and Integrating Circuits
269-283 Bimal Bhattacharyya view

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