Results 251 to 260 of about 3,789,974 (301)
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Thermal expansion and elastic constants
International Journal of Thermophysics, 1991We give a simple, useful relationship between thermal expansion, ΔV/V, and elastic constants. The relationship permits estimation of thermal expansion from only elastic constants (second order and third order) and atomic volume. Elastic-constant temperature dependence is not required.
Hassel Ledbetter
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Thermal dynamics and the time constant domain
IEEE Transactions on Components and Packaging Technologies, 2000The time-constant spectrum representation is a useful description of the dynamic thermal behavior of packages, assemblies and microsystems. After presenting the idea of the time constant spectrum representation of microelectronic structures, the paper provides an algorithm that can be used for time constant spectrum calculation in thermal simulator ...
V Székely, M Rencz
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Thermal-blooming time constant
Journal of the Optical Society of America, 1982Thermal blooming is analyzed by using a wave-propagation code to determine the speed of response of the blooming effect to changes in the transmitted laser beam. Results are developed to indicate where along the propagation path the dominant part of the thermal-blooming effects arise.
David L. Fried, Gus E. Mevers
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49th IEEE/IAS Industrial & Commercial Power Systems Technical Conference, 2013
The thermal model providing motor overload protection is derived from the first order differential equation for heat rise due to current in a conductor. Only the stator thermal time constant and the service factor are the required settings. The thermal model utilizes the full thermal capacity of the motor and allows current swings and cyclic overloads ...
Jon Steinmetz +2 more
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The thermal model providing motor overload protection is derived from the first order differential equation for heat rise due to current in a conductor. Only the stator thermal time constant and the service factor are the required settings. The thermal model utilizes the full thermal capacity of the motor and allows current swings and cyclic overloads ...
Jon Steinmetz +2 more
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Is The Thermal Time "Constant" Of A Diode Laser Really Constant?
SPIE Proceedings, 1990Application of the concept of the thermal time "constant" for a description of the transient thermal behavior of diode lasers is examined in the present paper. This concept rests on the assumption that the lumped-heat-capacity method is applicable in this case what turns out not to be true.
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Thermal constants measurement techniques applied to thermal analysis
Thermochimica Acta, 1992Abstract Recent development and applications of many new materials have resulted in them being made available only in small amounts or in special configurations such as thin films. In order to characterize their thermal transport and related properties in these forms, it has been necessary to develop new and improved quantitative measurement ...
R.P. Tye, R.L. Gardner, A. Maesono
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A thermal interpretation of the cosmological constant
Classical and Quantum Gravity, 1988A metric-affine geometrical structure is used to formulate a generalised theory of gravity, in which the motion of a test particle is characterised by a finite proper acceleration in the local tangent space. According to the local equivalence, valid for quantum systems, between acceleration and temperature, the theory is thermally interpreted as an ...
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Thermal conductance and its relation to thermal time constants
Journal of Thermal Biology, 1981Abstract A large body of thermoregulation studies exists in which the proper relationship between the physiological variable, thermal conductance, and heating or cooling time is not recognized. This is owing, in part, to conflicting definitions of conductance which either fail to relate to mean heat flow through the body surface or which fail to ...
Stanley L. Robertson, E.Norbert Smith
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Thermal behavior of the constant volume body plethysmograph
IEEE Transactions on Biomedical Engineering, 1995The thermal behavior of the constant volume body plethysmograph under the thermal effect of the patient and the thermostatic bag is modeled by two relations: the first is between the temperature in the box and the heat flux generated by the patient and the bag, and the second is between the pressure in the box and the same flux.
Philippe Saucez +3 more
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The thermal constants of setting concrete
Proceedings of the Physical Society, 1936The rise in temperature in a large mass of concrete during setting may be considerable, and the shrinkage stresses induced by the subsequent cooling may become large enough to cause cracking. It is, therefore, important to be able to calculate the rise of temperature likely to occur in such a mass.
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