نتایج جستجو برای: negative temperature coefficient thermistor
تعداد نتایج: 1114480 فیلتر نتایج به سال:
Introduction: SARS CoV-2 pandemic has caused illness and death in millions of people worldwide. Extensive studies are being conducted on the effect of meteorological parameters on the number of patients and clinical symptoms of COVID-19. Materials and Methods: This cross-sectional descriptive study was conducted in Abarkouh city with a population of 51199 people during 215 days (from April 20,...
In this work, the quasistatic thermoviscoelastic thermistor problem is considered. The thermistor model describes the combination of the effects due to the heat, electrical current conduction and Joule’s heat generation. The variational formulation leads to a coupled system of nonlinear variational equations for which the existence of a weak solution is recalled. Then, a fully discrete algorith...
BACKGROUND Although core temperature can be measured invasively, there are currently no widely available, reliable, noninvasive thermometers for its measurement. We thus compared a prototype zero-heat-flux thermometer with simultaneous measurements from a pulmonary artery catheter. Specifically, we tested the hypothesis that zero-heat-flux temperatures are sufficiently accurate for routine clin...
A freestanding microchannel, with integrated temperature sensors, has been developed for highpressure . flow studies. These microchannels are approximately 20pm x 2pm x 4400pm, and are suspended above 80 pm deep cavities, bulk micromachined using BrF3 dry etch. The calibration of the lightly boron-doped thermistor-type sensors shows that the resistance sensitivity of these integrated sensors is...
Barium titanate materials displaying a positive temperature coefficient of resistivity are ubiquitously employed as thermistors in electrical current and voltage control systems, well gas thermal sensing applications. The effect is widely accepted to be grain boundary-based phenomenon, although detailed studies on boundary structure chemistry, their influence the resulting properties, seriously...
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