نتایج جستجو برای: heat strain indices
تعداد نتایج: 496676 فیلتر نتایج به سال:
INTRODUCTION Physiological, anthropometrical and thermal perceptual are the most important factors affecting thermoregulation of men and women in workplaces. The purpose of this study was determining the validity of a questionnaire method for assessing women's heat strain in workplaces. METHODS This cross-sectional study was carried out on 96 healthy women. Data were continuously collected ov...
The occurrences of extreme weather, particularly heat-waves can often result in significant costs in terms of human health, damage to infrastructure, increased stress of natural ecosystems and reduced economic activity. In Australia, temperature extremes, producing intermittent heat-waves silently kill almost as many people as do any other natural disasters (Granger and Berechree 2005). While t...
The topological index is a numerical representation of molecular structure and predicts the physical property chemical compound. In present work, we have developed explicit expressions recently defined novel Ve- degrees Ev-degrees based indices Magnesium Oxide MgO (111). For this by consider unit cell (111) which extended to its general structure. After that, computed Ve-degrees then employing ...
The effects of heat stress on dry cows are profound and significantly contribute to lower overall welfare, productivity, profitability the dairy sector. Although more thermotolerant than lactating due their non-lactating state, similar environmental thresholds currently used estimate degree strain cooling requirements. Records cow studies conducted over 5 years in Gainesville, Florida, USA were...
Background: We assessed different systolic cardiac indices to describe left and right ventricular dysfunction in cirrhotic patients before liver transplantation. Methods: In this case-control study, eighty-one consecutive individuals with the confirmed hepatic cirrhosis and candidate for liver transplantation in the Imam Khomeini Hospital between March 2008 and March 2010 were selected. T...
Among the many input parameters of a forging process (for a multi-stage process one can count more than 200 different inputs!) the following important inputs shall be mentioned: Forging Material characteristics (flow curve = f(temperature, strain, strain rate, micro-structure) Influence of heat coefficients Friction type and friction value as well as lubrication Heat transfer Ambient media and ...
Laplace operators perturbed by meromorphic potential on the Riemann and separated type Klein surfaces are constructed and their indices are calculated by two different ways. The topological expressions for the indices are obtained from the study of spectral properties of the operators. Analytical expressions are provided by the Heat Kernel approach in terms of the functional integrals. As a res...
A modified strain-induced melt activation (SIMA) process was applied and its effect on the structural characteristics and hardness of the aluminum alloy Al–12Zn–3Mg–2.5Cu was investigated. Specimens subjected to a deformation of 40% at 300 °C were heat treated at various times (10-40 min) and temperatures (550-600 °C). Microstructural studies were carried out using opt...
Dislocation model of strain anisotropy is presented. The dislocation theorem of strain broadening is suggested which means that strain broadening can only be caused by dislocation-type lattice defects. Based on this theorem strain anisotropy is modeled and accounted for by assuming that strain broadening is caused by dislocations or dislocation-type lattice defects. The effect of strain anisotr...
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