Results 221 to 230 of about 171,914 (268)

Vacuum polarization at finite temperature on a cone

Physical Review D, 1995
An expectation value of a stress-energy tensor of a nonconformal massless scalar field in a background geometry of a cosmic string and at finite temperature is calculated. The result is applicable to arbitrary values of an angle deficit and temperature.
, Frolov, , Pinzul, , Zelnikov
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Electron temperature in polar semiconductors

physica status solidi (b), 1968
AbstractUsing 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, 2003
The 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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The effect of polarization frequency and temperature on polarization rule of tourmaline

Ferroelectrics, 2017
ABSTRACTIn order to understand the effect of polarization frequency and temperature on polarization rule of tourmaline, the ferroelectric hysteresis loops of three kinds of tourmaline samples are m...
Guojun Zhou, Kairen Chen, Xinghui Gai, Hao Liu, Changchun Zhao, Kun Shen, Zhenjun Fan   +6 more
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Is the Growth of Polar Fish Limited by Temperature?

1991
It is a widespread observation that polar marine invertebrates and fish grow slowly. Although a few species have been reported as growing rapidly (for example the sponge Mycale acerata at McMurdo Sound: Dayton et al. 1974), it is generally true that most polar marine invertebrates and fish grow more slowly than related species from wanner water ...
Clarke, Andrew, North, Anthony W.
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Proton polarization at room temperature

AIP Conference Proceedings, 1995
We 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, N. Hirota, M. Iinuma, A. Masaike, I. Shake, H. M. Shimizu, Y. Takahashi, R. Takizawa, M. Terazima, T. Yabuzaki   +9 more
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Mesopause temperatures in polar summer

Journal of Geophysical Research: Atmospheres, 1989
Between 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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Seasonal Polar Temperatures on the Moon

Journal of Geophysical Research: Planets, 2019
AbstractThe Diviner Lunar Radiometer Experiment on the Lunar Reconnaissance Orbiter has been acquiring visible and infrared radiance measurements of the Moon for nearly 10 years. These data have been compiled into polar stereographic maps of temperatures poleward of 80° latitude at fixed local times and fixed subsolar longitudes to provide an overview ...
J.‐P. Williams, B. T. Greenhagen, D. A. Paige, N. Schorghofer, E. Sefton‐Nash, P. O. Hayne, P. G. Lucey, M. A. Siegler, K. Michael Aye   +8 more
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Low-temperature spontaneous polarization

Ferroelectrics, 2000
Abstract A theoretical investigation is made of the polarization behaviour of displacive ferroelectrics at the low-temperatures ...
VladimÍr Koval, Carlos Alemany
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Observations of the temperature and polarization anisotropies with Boomerang 2003

New Astronomy Reviews, 2006
The Boomerang experiment completed its final long duration balloon (LDB) flight over Antarctica in January 2003. The focal plane was upgraded to accommodate four sets of 145 GHz polarization sensitive bolometers (PSBs), identical to those to be flown on the Planck HFI instrument.
W. C. Jones, P. A. R. Ade, J. J. Bock, J. R. Bond, J. Borrill, A. Boscaleri, CABELLA, PAOLO, C. R. Contaldi, B. P. Crill, DE BERNARDIS, Paolo, G. De Gasperis, A. De Oliveira Costa, DE TROIA, Grazia, G. Di Stefano, E. Hivon, A. H. Jaffe, T. S. Kisner, A. E. Lange, C. J. Mactavish, MASI, Silvia, P. D. Mauskopf, MELCHIORRI, Alessandro, T. E. Montroy, P. Natoli, C. B. Netterfield, PASCALE, ENZO, PIACENTINI, Francesco, D. Pogosyan, POLENTA, GIANLUCA, S. Prunet, RICCIARDI, Sara, G. Romeo, J. E. Ruhl, P. Santini, M. Tegmark, VENEZIANI, MARCELLA, N. Vittorio   +36 more
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