Results 211 to 220 of about 349,666 (265)

Thermal dynamics and the time constant domain

IEEE Transactions on Components and Packaging Technologies, 2000
The 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 ...
M Rencz, V Székely
exaly   +2 more sources

On the thermal time constant of structural walls

Applied Thermal Engineering, 2004
Abstract In the present investigation a numerical model is employed for the calculation of the transient wall heat flux, under the effect of a step temperature change at a particular wall side, for given initial and boundary conditions. The results were employed for the evaluation of the wall thermal time constant, which is widely employed quantity ...
P T Tsilingiris
exaly   +2 more sources

Time Constants of the Vestibular Thermal Reaction

Acta Oto-Laryngologica, 1989
For the thermal test, adaptation time constants of about 100 s are described in the literature. By automatically alternating hot-cold irrigation, as designed by us, precision of stimulus application of different temperatures was considerably improved. Furthermore, temperature was registered with a thermocouple device.
U, Reker, J, Müller-Deile
openaire   +2 more sources

Time constants in thermal laser medicine

Lasers in Surgery and Medicine, 1989
AbstractTemperature rise of laser‐irradiated tissue due to direct absorption of laser light is related to laser parameters (power, spot size, irradiation time, and repetition rate) and tissue parameters (absorption and scattering coefficients, density, heat capacity, and thermal conductivity).
M J, van Gemert, A J, Welch
openaire   +2 more sources

Are thermal constants constant? A test using two species of ladybird

Journal of Thermal Biology, 2014
There is a controversy about whether the thermal constants, lower developmental threshold, rate of development and corresponding degree days required for development, change when a species is reared under different developmental conditions. We present a more precise way of measuring these constants using the linear relationship between the rate of ...
V, Jarošík, G, Kumar, , Omkar, A F G, Dixon   +3 more
openaire   +2 more sources

Supercapacitor ageing at constant temperature and constant voltage and thermal shock

Microelectronics Reliability, 2010
This paper presents supercapacitor ageing according to the voltage, the temperature and thermal shock tests. To investigate this effect, a test bench of accelerated supercapacitor calendar ageing was carried out. Experimental tests are realized at constant temperature when the supercapacitors are polarized at the maximum voltage.
Hamid Gualous, Roland Gallay, G. Alcicek, Boubekeur Tala-Ighil, Amrane Oukaour, Bertrand Boudart, Philippe Makany   +6 more
openaire   +3 more sources

Time constants in thermal laser medicine: II. Distributions of time constants and thermal relaxation of tissue

Physics in Medicine and Biology, 1996
The thermal response of a semi-infinite medium in air, irradiated by laser light in a cylindrical geometry, cannot accurately be approximately by single radial and axial time constants for heat conduction. This report presents an analytical analysis of hear conduction where the thermal response is expressed in terms of distributions over radial and ...
van Gemert, M. J., Lucassen, G. W., Welch, A. J.   +2 more
openaire   +3 more sources

Stator thermal time constant

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, Subhash C. Patel, Stanley E. Zocholl   +2 more
openaire   +1 more source

Thermal-blooming time constant

Journal of the Optical Society of America, 1982
Thermal 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
openaire   +1 more source

Is The Thermal Time "Constant" Of A Diode Laser Really Constant?

SPIE Proceedings, 1990
Application 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.
openaire   +1 more source