نتایج جستجو برای: threshold temperature

تعداد نتایج: 568339  

Journal: :International wound journal 2017
Anke M Wijlens Samantha Holloway Sicco A Bus Jaap J van Netten

Home monitoring of skin temperature is effective to prevent diabetic foot ulceration. We explored the validity of various definitions for the >2·2°C left-to-right threshold used as a warning signal for impending ulceration. Twenty patients with diabetes and peripheral neuropathy monitored their skin temperature with an infrared thermometer at the plantar hallux, metatarsal heads, midfoot and he...

2013
Wonwoong Na Jae-Yeon Jang Kyung Eun Lee Hyunyoung Kim Byungyool Jun Jun-Wook Kwon Soo-Nam Jo

OBJECTIVES This study was conducted to investigate the relationship between heat-related illnesses developed in the summer of 2012 and temperature. METHODS The study analyzed data generated by a heat wave surveillance system operated by the Korea Centers for Disease Control and Prevention during the summer of 2012. The daily maximum temperature, average temperature, and maximum heat index wer...

Journal: :The Journal of General Physiology 1966
Richard Fitzhugh

In the squid giant axon, Sjodin and Mullins (1958), using 1 msec duration pulses, found a decrease of threshold with increasing temperature, while Guttman (1962), using 100 msec pulses, found an increase. Both results are qualitatively predicted by the Hodgkin-Huxley model. The threshold vs. temperature curve varies so much with the assumptions made regarding the temperature-dependence of the m...

This paper is the first study on the impact of ambient temperature on the electrical characteristics and high frequency performances of double gate armchair graphene nanoribbon field effect transistor (GNRFET). The results illustrate that the GNRFET under high temperature (HT-GNRFET) has the highest cut-off frequency, lowest sub-threshold swing, lowest intrinsic delay and power delay product co...

                The value of frost tolerance in wheat is increased with decreasing the temperature in late autumn and/or early winter (phase I, acclimation), then shows plateau state for a period with the coldest temperature (II), finally appears to decrease with warming the temperature (III, de-acclimation). This study was aimed to determine the threshold frost hardiness in wheat for avoiding ...

Journal: :iranian journal of electrical and electronic engineering 0
m. akbari eshkalak roudsar

abstract: this paper is the first study on the impact of ambient temperature on the electrical characteristics and high frequency performances of double gate armchair graphene nanoribbon field effect transistor (gnrfet). the results illustrate that the gnrfet under high temperature (ht-gnrfet) has the highest cut-off frequency, lowest sub-threshold swing, lowest intrinsic delay and power delay ...

2006
C. S. Lee Y. J. Chen W. C. Hsu K. H. Su J. C. Huang D. H. Huang C. L. Wu

High-temperature threshold characteristics of a symmetrically graded -doped InAlAs/ InxGa1−xAs/GaAs x=0.5→0.65→0.5 metamorphic high electron mobility transistor MHEMT have been investigated. The thermal threshold coefficients, defined as Vth / T, are superiorly low at 0.9 mV/K from 300 to 420 K and at −0.75 mV/K from 420 to 500 K. An interesting polarity change of the thermal threshold coeffici...

2001
Nelson Tansu Ying-Lan Chang Tetsuya Takeuchi David P. Bour Scott W. Corzine Michael R. T. Tan

Characteristic temperature coefficients of the threshold current ( 0) and the external differential quantum efficiency ( 1) are studied as simple functions of the temperature dependence of the physical parameters of the semiconductor lasers. Simple expressions of characteristics temperature coefficients of the threshold current ( ) and the external differential quantum efficiency ( 1) are expre...

2008
J. Chamings A. R. Adams S. J. Sweeney B. Kunert K. Volz W. Stolz

We report on the properties of GaNAsP/GaP lasers which offer a potential route to producing lasers monolithically on silicon. Lasing has been observed over a wide temperature range with pulsed threshold current density of 2.5 kA /cm2 at 80 K =890 nm . Temperature dependence measurements show that the radiative component of the threshold is relatively temperature stable while the overall thresho...

Journal: :Investigative ophthalmology 1971
B Ward W R Bruce

Young adult rhesus monkeys were anesthetized with a barbiturate which dislocates the normal thermoregulatory mechanism. The core temperature was then controlled by a heating pad, and the chorioretinal burn threshold was determined for different temperatures with the use of light from a Zeiss photocoagulator. The results show linear relationships between the threshold retinal irradiances and bod...

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