نتایج جستجو برای: time temperature shift factor
تعداد نتایج: 3060026 فیلتر نتایج به سال:
This paper investigates the impact of parameter variation between parallel connected SiC MOSFETs on short circuit (SC) performance. SC tests are performed devices with different switching rates, junction temperatures and threshold voltages (VTH). The results show that VTH is most critical factor affecting reduced robustness under SC. current conducted per device shown to increase connection com...
Introduction: Demand for Australian mined iron ore has increased employment within this sector thus exposing increased numbers of workers to the harsh Australian climate. This study examined the influence of hot (>30C WBGT) environmental temperatures, consistent with working in North Western Australia, on iron ore mining staff. Methods: Core temperature, hydration status, perceived exertion, mo...
The protein kinase inhibitor H7 [1-5(isoquinolinesulfonyl-2-methylpiperazine)] together with a temperature shift to 42 degrees C was found to reproducibly and efficiently induce differentiation of avian erythroblasts transformed with the avian erythroblastosis virus containing v-erbA and a temperature-sensitive v-erbB oncogene. Although a temperature shift to 42 degrees C without H7 results in ...
background: health workers ability to provide high quality care can be adversely affected by many factors such as sleep deprivation associated with shift work. the aim of this study was to compare sleep disorders among shift workers and non-shift workers in kermanshah hospital (2005) methods: at first, demographic information of the participants were gathered. 653 volunteers were divided into t...
An impedance-based temperature estimation method is investigated considering the electrochemical non-equilibrium with short-term relaxation time for facilitating the vehicular application. Generally, sufficient relaxation time is required for battery electrochemical equilibrium before the impedance measurement. A detailed experiment is performed to investigate the regularity of the battery impe...
The dynamic Stokes shift of coumarin 153 has been measured in two room-temperature ionic liquids, 1-(3-cyanopropyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and 1-propyl-3-methylimidazolium tetrafluoroborate, using the fluorescence up-conversion technique with a 230 fs instrumental response function. A component of about 10-15% of the total solvation shift is found to take place on...
Background and aims: Shift work intolerance has symptoms that names shift work maladaption syndrome. The aim of this study is the comparison between frequency of symptoms of acute shift work maladaption syndrome in two groups of shift workers. Methods: A cross-sectional study has been implemented in two groups of shift workers ( with and without night shift) , data has been gathered by a qu...
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