Results 241 to 250 of about 4,158,282 (292)

Temperature control of a distributed collector field

Solar Energy, 1995
Abstract In this paper an investigation of a temperature control with mass flow manipulation for a distributed field of parabolic trough collectors is described. The dynamics of a collector loop are modelled by a set of nonlinear first-order hyperbolic partial differential equations. A computer model is set up to calculate the closed-loop response of
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Finite-temperature field theory with a cutoff

Physical Review D, 1993
We investigate the effect of putting a cutoff on finite-temperature field theory. We then apply this procedure to several currently interesting models, i.e., the Higgs model viewed as an effective low-energy theory, the Nambu-Jona-Lasinio model, and the dual superconducting model for the confining region of QCD.
, Amte, , Rosenzweig
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Field and Temperature Dependent Recombination in Anthracene

Applied Optics, 1969
The quantum efficiency of photoconductivity in anthracene depends on electric field and temperature. Analysis of these results strongly suggests that the generation of free holes and electrons can be described by a model in which, following the initial ionization, most electron-hole pairs are thermalized while still bound by their mutual Coulomb field.
R H, Batt, C L, Braun, J F, Hornig
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Thermal Diffusion in a Sinusoidal Temperature Field

Physical Review Letters, 2004
Separation of liquid mixtures in a thermal gradient, known as the Ludwig-Soret effect or thermal diffusion, is governed by a nonlinear, partial differential equation. It is shown here that the nonlinear differential equation for a binary mixture can be reduced to a Hamiltonian system of equations and that a solution can be obtained for the linear ...
Walter L, Craig, Sorasak, Danworaphong, Gerald J, Diebold   +2 more
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The temperature of a gravitational field

Physics Letters A, 1979
Abstract We study the behavior of a two-level atom, interacting with a quantized field in the vacuum state, when there is an ambient gravitational field. We find that one can, in some approximate way, associate an equivalent temperature with the gravitational field similar to the one associated with an acceleration in flat space time.
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Ways to measure body temperature in the field

Journal of Thermal Biology, 2014
Body temperature (Tb) represents one of the key parameters in ecophysiological studies with focus on energy saving strategies. In this study we therefore comparatively evaluated the usefulness of two types of temperature-sensitive passive transponders (LifeChips and IPTT-300) and one data logger (iButton, DS1922L) mounted onto a collar to measure Tb in
Franz Langer, Joanna Fietz
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Calculation of Temperature Field in Power Capacitor

IEEE Transactions on Industrial Electronics, 2015
The operating temperature of a power capacitor has an effect on its service life directly. A 500-kvar power capacitor is taken as the research object. The capacitor fever produced by internal dielectric loss is considered under the running condition of 55 $^{\circ}\hbox{C} $ .
Yanping Liang, Dongmei Wang, Lianlian Gao, Daihong Liu   +3 more
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Field and temperature dependent conductivity of syndiotactic polypropylene effect of temperature and electric field

2014 IEEE Electrical Insulation Conference (EIC), 2014
Syndiotactic polypropylene (s-PP) is an extrudable polymer with properties which should make it highly suitable as high voltage cable insulation, including high AC breakdown strength, flexibility and a high melting point. However, for HVDC applications it is important to improve the knowledge of charge transport phenomena which control the field ...
Jorunn Holto, Oystein Hestad
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Temperature Field in Material

2004
Deformation of materials is carried out at room temperature and at elevated tempe-ratures. At elevated temperatures, recovery and recrystallization take place, and the flow curves depend strongly on such material parameters as temperature or strain rate.
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String field theory at finite temperature

Physical Review D, 1987
We present a real-time formalism enabling us to compute statistical averages of various quantum string field correlation functions and scattering amplitudes in the context of perturbation theory and functional methods. Second quantization of the string fields is carried out in the path-integral representation.
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