نتایج جستجو برای: temperature stress

تعداد نتایج: 869349  

2016
Scott T. Chiesa Steven J. Trangmar José González-Alonso

The influence of temperature on the hemodynamic adjustments to direct passive heat stress within the leg's major arterial and venous vessels and compartments remains unclear. Fifteen healthy young males were tested during exposure to either passive whole body heat stress to levels approaching thermal tolerance [core temperature (Tc) + 2°C; study 1; n = 8] or single leg heat stress (Tc + 0°C; st...

Journal: :بوم شناسی کشاورزی 0
سمیرا صبوری راد محمد کافی احمد نظامی محمد بنایان اول

kochia (kochia scoparia l. schard) is an annual, halophyte and drought resistant plant that can be irrigated with saline water and a valuable source for forage under drought and saline ecosystem. in order to evaluate the germination characteristic of kochia under different temperatures and salinity stress levels, an experiment was conducted at physiology lab of ferdowsi university of mashhad, i...

Journal: :Plant physiology 2004
Fatma Kaplan Joachim Kopka Dale W Haskell Wei Zhao K Cameron Schiller Nicole Gatzke Dong Yul Sung Charles L Guy

Metabolic profiling analyses were performed to determine metabolite temporal dynamics associated with the induction of acquired thermotolerance in response to heat shock and acquired freezing tolerance in response to cold shock. Low-M(r) polar metabolite analyses were performed using gas chromatography-mass spectrometry. Eighty-one identified metabolites and 416 unidentified mass spectral tags,...

2009
James L. Hanson

Laboratory and field tests have shown that accelerated compression of peat soils occurs in response to moderate heating and an effective overconsolidation is produced on subsequent cooling. This phenomenon has been termed thermal precompression. In this study, long-term laboratory and field tests were conducted to investigate secondary compression behavior of peat as a function of stress and te...

2011
Scott Lee Chen Chen Maurice Stevens

In this project, we developed a low temperature (≤450C) silicon-germanium (SiGe) process using the Thermcopoly1/2 furnaces at SNF. Low stress (≤100MPa) poly SiGe has been successfully demonstrated with a deposition temperature below 450C and desired Si to Ge content ratio. Our SiGe deposition process is CMOS compatible and can enable a number of applications for microelectromechanical systems (...

2005
George Havenith

Th is paper discusses human thermoregulation and how this relates to health problems during exposure to climatic stress. Th e heat exchange of the body with the environment is described in terms of the heat balance equation which determines whether the body heats up, remains at stable temperature, or cools. Inside the body the thermoregulatory control aims at creating the right conditions of he...

2016
Jabid Quiroga John Quiroga Luis Mujica Rodolfo Villamizar Magda Ruiz

In this paper, a guided wave temperature robust PCA-based stress monitoring methodology is proposed. It is based on the analysis of the longitudinal guided wave propagating along the path under stress. Slight changes in the wave are detected by means of PCA via statistical T 2 and Q indices. Experimental and numerical simulations of the guided wave propagating in material under different temper...

2001
K. W. Poh

This paper presents a new mathematical relationship for representing the stress-strain behavior of structural steel at elevated temperatures. The relationship is constructed by fitting two versatile, continuous equations to experimental data. The first equation, a general stress-strain equation previously proposed by Poh, is used for characterizing the stress-strain data. The second equation is...

2008
C. Chen Charlene Chen Katsumi Abe Hideya Kumomi Jerzy Kanicki

Current temperature stress (CTS) measurements were performed on RF sputter amorphous In-Ga-Zn-O (a-InGaZnO) thin film transistors (TFTs). We investigated the effect of stress current (ISTR) and stress temperature (TSTR) on the electrical properties of the aInGaZnO TFTs when stressed in both the linear and saturation regimes.

This paper addresses the combined effects of couple stresses, thermal radiation, viscous dissipation and slip condition on a free convective flow of a couple stress fluid induced by a vertical stretching sheet. The Cogley- Vincenti-Gilles equilibrium model is employed to include the effects of thermal radiation in the study. The governing boundary layer equations are transformed into a system o...

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