Results 221 to 230 of about 164,976 (267)
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Science, 1969
The presence of substantial polar cooling of Venus, as derived from microwave interferometry at 10.6 cm wavelength, is shown to be open to doubt. Other microwave measurements give little evidence for significant poleward variation in temperature on the planet.
W A, Gale, A C, Sinclair
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The presence of substantial polar cooling of Venus, as derived from microwave interferometry at 10.6 cm wavelength, is shown to be open to doubt. Other microwave measurements give little evidence for significant poleward variation in temperature on the planet.
W A, Gale, A C, Sinclair
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Low-temperature spontaneous polarization
Ferroelectrics, 2000Abstract A theoretical investigation is made of the polarization behaviour of displacive ferroelectrics at the low-temperatures ...
VladimÍr Koval, Carlos Alemany
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Temperature-dependent polarization effects in Ce:LiLuF
Applied Optics, 2001We report on tuned-laser, pump-probe-gain, and fluorescence yield studies of the effect that crystal temperature plays on the polarized emission characteristics of Ce:LiLuF. It was found that varsigma-polarized emission at the 327-nm fluorescence spectra peak is characterized by smaller laser pulse buildup times, higher small-signal gains, and smaller ...
A J, McGonigle +2 more
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Aerosols and Polar Temperature Changes
Science, 1975Calculations indicate that aerosols are not directly responsible for the present increase in ice abundance in the Northern Hemisphere. Indeed it appears that aerosols cause heating of the atmosphere near the poles. The present background aerosol density at 85°S latitude causes a temperature increase of ∼ 0.2°K, while that at 85°N causes an increase of ∼
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Temperatures in the polar wind
Planetary and Space Science, 1974Abstract The thermal structure of the plasma in the polar wind is examined. With O + H + Joule heating as the mechanism for heating the plasma, it is found that O + and H + temperatures are significantly greater than the electron temperature. With the adopted input parameters the O + H + temperature difference is relatively small.
G.J. Bailey, R.J. Moffett
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Proton polarization at room temperature
AIP Conference Proceedings, 1995We have polarized protons in naphthalene doped with pentacene at higher temperature (≥77 K) and lower magnetic field (∼3 kG) than those for ordinary polarized proton targets. Pentacene molecules have been excited with a laser beam. Protons in naphthalene have been polarized dynamically on the intermediate state of pentacene.
M. Daigo +9 more
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Electron temperature in polar semiconductors
physica status solidi (b), 1968AbstractUsing the electron temperature approximation an analysis is made of the scattering integral in an intense electric field for a semiconductor with an arbitrary non‐parabolic energy band. The electron temperature is then derived for a purely polar semiconductor with a non‐parabolic dispersion law such as n‐type InSb. The calculations only include
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Temperature polarization in pervaporation
Desalination, 2003The incidence of temperature polarization has received considerable attention in membrane processes such as membrane distillation and thermoosmosis but has been much less investigated in pervaporation. Based on a theoretical computation on a case study (pervaporation of water through a dense cellulose acetate membrane), it has been confirmed that this ...
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Mesopause temperatures in polar summer
Journal of Geophysical Research: Atmospheres, 1989Between June 10 and July 19, 1987, a total of 26 falling spheres have been successfully launched from the Andøya Rocket Range in Norway (69°N, 16°E). From precision radar tracking of the sphere trajectories, 26 temperature profiles were derived for the altitude range 50–90 km. A mean profile, calculated from all data obtained, shows the mesopause to be
U. von Zahn, W. Meyer
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Polarization-induced pairing in high-temperature superconductivity
Physical Review B, 1987We propose a mechanism for the pairing of electrons at the copper sites on the spin of quasi-one-dimensional Cu-O chains induced by the electronic polarization of the oxygen atoms in the side chains. We use a model Hamiltonian for a cluster of Cu-O chains and calculate the various correlation functions for a wide range of parameters.
, Callaway, , Kanhere, , Misra
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