نتایج جستجو برای: Temperature change

تعداد نتایج: 1005841  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده مهندسی علوم آب 1393

drought is transient phenomenon , slow , repetitive and integral part of the climate of each region. drought begins with a substantial reduction in precipitation over the long-term average rainfall and over time, reduced soil moisture and surface and ground water resources will continue to decrease. this phenomenon is the most important in bakhtegan basin because of its importance in strategic ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

Journal: :natural environment change 0
masoud masoudi associate prof. of department of natural resources andenvironmental engineering, college of agriculture, shiraz university, iran maryam elhaeesahar department of natural resources and environmental engineering, college of agriculture, shiraz university, iran

in this paper, according to the data of 17 weather stations in khuzestan during 1951–2012, the trend of climate changes and its severity were evaluated. a consistent correlation was highlighted for trends of de martonne index as indicator of climate and temperature index in some stations. based on the results of the temperature analysis, 88.31% of the province became warmer, 6.3% became colder,...

Journal: :The Journal of experimental biology 2015
W Wesley Dowd Felicia A King Mark W Denny

In this review we consider how small-scale temporal and spatial variation in body temperature, and biochemical/physiological variation among individuals, affect the prediction of organisms' performance in nature. For 'normal' body temperatures - benign temperatures near the species' mean - thermal biology traditionally uses performance curves to describe how physiological capabilities vary with...

Journal: :international journal of occupational and environment medicine 0
andrew punton university of dundee medical school, dundee, uk elizabeth j crossley hull york medical school, university of york, york, uk natasha r matthews hull york medical school, university of york, york, uk sarah c walpole hull york medical school, university of york, york, uk

[no abstract available]

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم زمین 1388

چکیده ندارد.

Journal: :iranian journal of public health 0
mohammad baaghideh fatemeh mayvaneh

abstract background: weather and climate play a significant role in human health. we are accustomed to affects the weather conditions. by increasing or decreasing the environment temperature or change of seasons, some diseases become prevalent or remove. this study investigated the role of temperature in cardiovascular disease mortality of city of mashhad in the current decade and its simulatio...

Journal: :Current opinion in biotechnology 2016
Thulani Peter Makhalanyane Marc Warwick Van Goethem Don Arthur Cowan

Global change is disproportionately affecting cold environments (polar and high elevation regions), with potentially negative impacts on microbial diversity and functional processes. In most cold environments the combination of low temperatures, and physical stressors, such as katabatic wind episodes and limited water availability result in biotic systems, which are in trophic terms very simple...

2016
Shifei Qi Hualing Yang Juan Chen Xiaoyang Zhang Yingping Yang Xiaohong Xu

The quantized anomalous Hall effect (QAHE) have been theoretically predicted and experimentally confirmed in magnetic topological insulators (TI), but dissipative channels resulted by small-size band gap and weak ferromagnetism make QAHE be measured only at extremely low temperature (<0.1 K). Through density functional theory calculations, we systemically study of the magnetic properties and el...

2018
Jisung Park

Understanding the link between temperature and educational outcomes is important in assessing the efficiency and equity implications of various schooling interventions and the potential welfare impacts of climate change. Using student-level administrative data for the largest public school district in the United States, I estimate the causal impact of hot temperature on high-stakes exam perform...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید