نتایج جستجو برای: respectively global warming

تعداد نتایج: 1123603  

Journal: :international journal of occupational and environment medicine 0
sc walpole north yorkshire and east coast deanery s singh school of population health, university of auckland n watts international federation of students’ associations (ifmsa)

[no abstract available]

Journal: :محیط زیست طبیعی 0
حمزه میرحاجی کارشناس ارشد مکانیزاسیون دانشگاه فردوسی مشهد مهدی خجسته پور دانشیار گروه ماشین های کشاورزی، دانشگاه فردوسی مشهد محمدحسین عباسپورفرد دانشیار گروه ماشین های کشاورزی، دانشگاه فردوسی مشهد

life cycle study of a product is an accepted method for determining the side effects of its production process on environment during its complete life cycle. in this research, the impacts of global warming, acidification, terrestrial eutrophication and fossil resources depletion per unit yield of wheat (ton) on environment were investigated using life cycle assessment method in marvdasht region...

Journal: :international journal of occupational hygiene 0
mohammad reza monazzam esmaeil pour department of occupational hygiene, school of public health and center for air pollution research (capr), institute for environmental research (ier), tehran university of medical sciences, tehran, iran rohollah hajizadeh phd student, occupational health research center, qom university of medical sciences, qom, iran mohammad hossein beheshti department of occupational health engineering, school of public health, gonabad university of medical sciences, gonabad, iran zeinab kazemi phd student in ergonomics. department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iran marzieh monazzam m.sc, bs. student, department of architecture, kashan university, kashan, iran

original article   introduction: direct sunlight and increased heat load influence mental and physical health of workers negatively and result in performance impairment. activity reduction is a natural body response to increase in internal body temperature, and a compensatory mechanism to make body balanced. this study was carried out to estimate productivity loss due to heat exposure among ira...

Journal: :natural environment change 0
yousef ghavidel rahimi associated professor in climatology, department of physical geography, tarbiat modares university, tehran, iran meysam tolabi nejad m.sc. in applied climatology, tarbiat modares university, tehran, iran manouchehr farajzadeh asl full professor in climatology, department of physical geography, tarbiat modares university, tehran, iran

climate change disturbs the distribution of precipitation patterns and affects water resources. a lot of evidences imply that the increased atmospheric concentration of greenhouse gasses in turn increases the precipitation changes around the world. thus, since iran is located in an arid zone of the earth, identifying the effects of co2 concentrations on iran precipitation rate is highly importa...

Journal: :international journal of environmental research 2010
f.c. sham t.y. lo h.t. lum

global warming is one of the major concerns in environmental issues. its effects are being exposed faster than anticipated recently. it causes adverse ecological and socioeconomical effects. the 4th assessment report issued by the u. n.’s intergovernmental panel on climate change (ipcc) states that it is appropriate to define global warming was caused by greenhouse gases due to human activities...

Journal: :iranian journal of public health 0
majid habibi mohraz asghar ghahri mehrdad karimi farideh golba­baei

background: the workers who are working in the open and warm environments are at risk of health effects of climate and heat changes. it is expected that the risk is increase with global warming. this study aimed to investigate the changes of wet bulb globe temperature (wbgt) index in the past and to predict their trend of future changes in tehran, capital of iran. methods: the meteorological da...

Journal: :international journal of occupational and environment medicine 0
the ijoem

0

Journal: :جغرافیا و مخاطرات محیطی 0
طاهر صفرراد قاسم عزیزی حسین محمدی حسنعلی فرجی سبکبار

. introduction the siberian high (sh) is a quasi-stationary and semi-permanent surface high pressure system residing over the eurasian continent during winter with its climatological–mean central pressure exceeding 1030 hpa. this most important atmospheric center of action controls the climate of a wide area of this continent. the sh forms generally in october mainly in response to strong radia...

Journal: :مهندسی بیوسیستم ایران 0
بنیامین حوشنویسان دانشجوی کارشناسی ارشد، دانشکدۀ مهندسی و فناوری کشاورزی پردیس کشاورزی و منابع طبیعی دانشگاه تهران شاهین رفیعی استاد، دانشکدۀ مهندسی و فناوری کشاورزی پردیس کشاورزی و منابع طبیعی دانشگاه تهران محمود امید استاد، دانشکدۀ مهندسی و فناوری کشاورزی پردیس کشاورزی و منابع طبیعی دانشگاه تهران علیرضا کیهانی استاد، دانشکدۀ مهندسی و فناوری کشاورزی پردیس کشاورزی و منابع طبیعی دانشگاه تهران مهران موحدی دانش آموختۀ کارشناسی ارشد، دانشکدۀ مهندسی و فناوری کشاورزی پردیس کشاورزی و منابع طبیعی دانشگاه تهران

by increasing crops yield due to intensive use of agricultural machinery and energy inputs, utilizedenergy in agriculture has been increasing rapidly which negative environmental impacts on water,air and soil are its consequences. in this paper, potato production in isfahan province was studiedusing life cycle assessment approach from the standpoint of energy consumption and environmentalimpact...

Journal: :international journal of automotive engineering 0
gaurav r. kumar

air conditioning refrigerant r134a has value of global warming potential (gwp) 1300, which is much higher than mac directive (gwp below 150) passed in july 2006. this prompted a search for alternative refrigerant with gwp value less than 150. r1234yf is a new refrigerant which has lower gwp value of 4. effect of blower speed has been compared and flammability issue of r1234yf has been addressed...

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