نتایج جستجو برای: natural and environmental factors
تعداد نتایج: 17026039 فیلتر نتایج به سال:
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 ...
this study was designed to investigate the effect of environmental factors on the appearance of polycystic ovaries (pco) during the first two decades of life. ninety-four female-female twins who underwent a transabdominal ultrasound at the royal hospital for women were sent a questionnaire asking about their birth details, feeding history as a baby, childhood illnesses and vaccination as well a...
Analysis and Measurement of Environmental Resilience of Villages in Gorganrud Watershed against Flood (Golestan province, Iran) Abstract Environmental hazards are inevitable phenomena that always place serious risks on the development of human societies, especially rural development. In the recent years, however, significant changes have been made in crisis management approaches, and the p...
magnetic resonance imaging (mri) is a notable medical imaging technique that makes of phenomenon of nuclear magnetic resonance. because of the resolution and the technology being harmless, mri has considered as the most desirable imaging technique in clinical applications. the visual quality of mri plays an important role in accuracy of medical delineations that can be seriously degraded by exi...
Advantages of urbanization such as access to clean water, health, and overall easier life in cities, as well as the disadvantages or its negative effects on environment cannot be ignored. Today, there are numerous environmental problems due to the reduction in ecologically valuable places within urban areas. Bringing nature to the cities appears to be essential to enhance urban environment and ...
thermal barrier coatings (tbcs) are used to provide thermal insulation to the hot section components of gas turbines in order to enhance the operating temperature and turbine efficiency. hot corrosion and thermal shocks are the main destructive factors in tbcs which comes as a result of oxygen and molten salt diffusion into the coating. in this thesis atmospheric plasma spraying was used to dep...
The water shortage crisis that is sweeping the globe today has posed serious harm and threat to people around the world. Meanwhile, Iran is one of the water-scarce countries due to its location in the arid and semi-arid belt and fluctuations in rainfall. The water status in most of its regions is in a state of tension and sometimes crisis. The pervasive nature of water and the existence of nume...
a spring-stream called “ghadamgah” in fars province, southern iran, which holds more than 60 aquatic vertebrate and plant species belonging to 46 genera and 33 families is almost the biologically richest water body of fars province. the diversity is especially in its endemic fishes which are under threats nowadays. one of the factors, if not the one, which has kept this system more or less in i...
It is widely agreed the Anthropocene has seen an unprecedented decline in the natural resources conditions that have underpinned the economic growth of the last few hundred years. As communities, we have not responded to Boulding’s vision of ‘the coming space ship earth’ although not for want of much official and private effort. As ‘wicked problems’ the impacts have been often ignored or off lo...
this research aims to apply a model to the study and analysis of environmental and natural resource costs created in supply chains of goods and services produced in thailand, and propose indicators for environmental problem management, caused by goods and services production, based on concepts of sustainable production and consumer behavior. the research showed that the highest environmental co...
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