نتایج جستجو برای: heat generating body
تعداد نتایج: 1021482 فیلتر نتایج به سال:
In this paper, a numerical solution of an inverse non-dimensional heat conduction problem by spline method will be considered. The given heat conduction equation, the boundary condition, and the initial condition are presented in a dimensionless form. A set of temperature measurements at a single sensor location inside the heat conduction body is required. The result show that the proposed meth...
There is a need for a hand-heating system that will keep the hands warm during cold exposure without hampering finger dexterity. The purpose of this study was to examine the effects of torso heating on the vasodilative responses and comfort levels of cooled extremities during a 3-h exposure to -15 degreesC air. Subjects were insulated, but their upper extremities were left exposed to the cold a...
In spite of increased environmental cold stress, heat strain is possible also in a cold environment. The body heat balance depends on three factors: environmental thermal conditions, metabolic heat production and thermal insulation of clothing and other protective garments. As physical exercise may increase metabolic heat production from rest values by ten times or even more, the required therm...
Based on two integration steps, an optimization framework is proposed in this work for the synthesis and design of complex distillation sequence. The first step is to employ heat integration in sequence and reduce the heat consumption and total annual cost of the process. The second one is to increase the exergetic efficiency of sequence by generating power in implemented expanders in sequence....
Pretorius, Thea, Gerald K. Bristow, Alan M. Steinman, and Gordon G. Giesbrecht. Thermal effects of whole head submersion in cold water on nonshivering humans. J Appl Physiol 101: 669–675, 2006. First published April 13, 2006; doi:10.1152/japplphysiol.01241.2005.— This study isolated the effect of whole head submersion in cold water, on surface heat loss and body core cooling, when the confoundi...
BACKGROUND In Sasang medicine, patients are treated with herbal prescriptions based on Cold-Heat patterns induced by conditions of physiological equilibrium among internal organs, which also induce differences in body circumferences. The objective of the current study was to elucidate the relationship between Cold- and Heat-prescription types and body circumferences. METHODS Data from suitabl...
Endothermy (the metabolic production and retention of heat to warm body temperature above ambient) enhances physiological function, and whole-body endothermy generally sets mammals and birds apart from other animals. Here, we describe a whole-body form of endothermy in a fish, the opah (Lampris guttatus), that produces heat through the constant "flapping" of wing-like pectoral fins and minimize...
The generating function method is applied to the trace of the heat kernel and the one-loop effective action derived from the covariant perturbation theory. The basis of curvature invariants of second order for the heat kernel (Green function) is built and simple rules for form factor manipulations are proposed. The results are checked by deriving the Schwinger-DeWitt series of the heat kernel a...
INTRODUCTION Thermal stress becomes larger in the baby than in the adult, when they are exposed in a cold environment (Belghazi et al., 2005). This is because heat exchange in the baby is larger than in the adult due to the larger ratio of body surface area to body mass. Heat transfer form the body is also one of important factors to determine the level of the body heat exchange. Therefore, dis...
This study isolated the effect of whole head submersion in cold water, on surface heat loss and body core cooling, when the confounding effect of shivering heat production was pharmacologically eliminated. Eight healthy male subjects were studied in 17 degrees C water under four conditions: the body was either insulated or uninsulated, with the head either above the water or completely submerse...
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