نتایج جستجو برای: dust accumulation
تعداد نتایج: 190742 فیلتر نتایج به سال:
mineral dust can directly affect the solar and terrestrial radiation in both visible and infrared (ir) spectral regions through scattering and absorption processes. due to specific optical properties of dust particles, satellite observed radiances carry the spectral signatures of dust particles that are different from molecular, cloud, and underlying surface. based on these differences, various...
Effect of Simulated Dust Storm on some Bio-chemical features of Persian Oak (Quercus brantii Lindl.)
Extended abstract 1- Introduction Dust storm is a hazardous natural event affecting all creatures. (1). Due to the global warming drought, reduction in precipitation, and mismanagement in the water by humankind, the negative effects of this calamity were more observed (2). With increasing the wind speed, and based on the size of dust particles, land topography, soil humidity, vegetation cover...
limestone, exploited near bielawy, a town located in the kujawsko-pomorskie province ofpoland, is the main raw material in the production process in a cement plant. the dust emitted by the factory is of alkaline ph and contains such heavy metals as: cadmium (cd), lead (pb), chromium (cr) and nickel (ni). the research aims at assessing the influence of cement dust on the total content and bioava...
This study mainly focuses on understanding the properties of dust particle deposition (Cement, Brick powder, White cement, Fly ash, and Coal) a solar photovoltaic (PV) panel under dry conditions in an indoor environment to record percentage efficiency reduction profile. For experimental study, PV is manually drifted at three different titled angles (and) with respect five samples taken replicat...
The degradation in electrical output of solar arrays on Mars landers and rovers is reviewed. A loss 0.2% per Sol typical, although observed rates decrease ‘dust factor’ vary between 0.05% 2% Sol. 0.2%/Sol has been throughout the first 800 Sols ongoing InSight mission, as well shorter Pathfinder Phoenix missions. This rate was also evident for much Spirit Opportunity missions, but there episodic...
This study analyzed the possible use of a residue from steel industry, blast furnace dust, as aggregate in asphalt mixtures for pavements, solution to problems generation and accumulation industrial waste production steel, well exploitation non-renewable materials infrastructure construction. In solid residues such slag dust are generated, which become waste. Another found issue pavement constr...
background: the phenomenon of dust is a serious environmental problem in dry and semi dry regions. it has a destructive effect for the residents of such regions. over two-thirds of iran is in areas of dry and semi-dry climate conditions. methods: in this research, dust fall measurements were taken in 41 stations across yazd city using a marble dust collector (mdco) located in different parts of...
Investigation and evaluation of dust and microstrip phenomena is one of the important values in the management of climate and environmental hazards in the Middle East, especially in the arid, western, southern and central parts of Iran. Methods and plans for studying this phenomenon and its management are of great importance and great value. According to studies on dust phenomena based on pre...
How different source regions across the Middle East change aerosol and dust particle characteristics
A major question is whether different source regions across the Middle East account for changes in aerosol and dust particle characteristics, which impact Western Iran. Therefore, over a period of sampling from April 2017 to April 2018, dust particles were collected in Western Iran from different cities including Urmia, Sanandaj, Sare-Pole-Zahab, Dehloran and Abadan. The research aim is to comp...
Background and Objective: Heavy metal (HM) pollution of settled dust on the interior surfaces of elementary schools may affect the health of young students; hence, the health risk of such pollution should be assessed. Therefore, the aims of this study were to measure the content of heavy metals in the settled dust in the indoor of elementary schools in Bandar Abbas and to assess the attributed ...
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