نتایج جستجو برای: ambient temperature

تعداد نتایج: 487990  

Journal: :معماری و شهرسازی 0
منصوره طاهباز دانشیار دانشکده معماری، دانشگاه شهید بهشتی، تهران شهربانو جلیلیان کارشناس ارشد معماری، محقق آزاد، تهران

pavement materials have great impact on heat island control under the urban canyon layer. understanding the properties of pavement materials can help to reduce the heat island effect. introducing the main properties of pavement surfaces affecting sol-air temperature and mean radiant temperature - such as albedo, permeability, conductivity, thickness, emissivity, irradiation and convective air f...

2002
Young-Jae Ryoo Seong-Hwan Kim Young-Hak Chang Young-Cheol Lim Eui-Sun Kim Jin-Kyu Park

This paper describes a system that can be used to recognize an unknown material regardless of the change of ambient temperature using temperature response curve fitting and fuzzy neural network(FNN). There are some problems to realize the recognition system using temperature response. It requires too many memories to store the vast temperature response data and it has to be filtered to remove n...

Journal: :Environmental Health Perspectives 2002
Rupa Basu Jonathan M Samet

Because of concern for heat-related mortality in vulnerable populations, particularly the elderly, practical epidemiologic methods are needed for the assessment of ambient heat exposure on individuals. We used a personal monitor to measure body temperature, ambient temperature, heart rate, and activity level of 42 elderly residents of Baltimore, Maryland, in the summer months of 2000. Each part...

Journal: :Current opinion in plant biology 2005
Alon Samach Philip A Wigge

Since plants are sessile they must be able to sense and rapidly respond to changes in ambient temperature. Key aspects of plant development, including the transition to flowering and the circadian clock, have important inputs from ambient temperature. In the model system Arabidopsis thaliana, molecular candidates for mediating these roles have recently been uncovered, which will be critical for...

In this study, exergy analysis of a flat plat solar collector in a closed circuit has been performed using existing experimental data and the effects of utilization of the collector with upper, lower and side reflectors alone and together with lenses on exergy efficiency have been considered. Then, based on a mathematical model, optimization analysis has been performed. Unlike the past studies,...

Presence of nanoscale bainitic ferrites and high carbon retained austenites that are stable at ambient temperature within the microstructures of super strong bainitic steels makes it possible to achieve exceptional strengths and ductility properties in these groups of nanostructured steels. This article aims to study the effect of the dislocation density variations during tensile testing in amb...

The chemical surfactant flooding can mobilize the trapped oil by lowering the interfacial tension between oil and brine and in some cases altering the reservoir rock wettability. In this work, the effect of surfactants on oil/brine interfacial tension was experimentally investigated. First, the effect of surfactants concentration was surveyed. Afterwards, the effect of salinity on surfactant be...

This paper investigates the effects of subcooling the condenser outlet refrigerant in a compression refrigeration by an absorption refrigeration in an integrated refrigeration system from energy view point. For this purpose the thermodynamic system is analyzed, base on the mass and energy equation and also the effects of operating parameters such as prime mover, ambient temperature and evaporat...

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