منابع مشابه
investigation of effective parameters on the rigidity of light composite diaphragms (psscb) by fem
در این رساله با معرفی سقف های psscb متشکل از ترکیب ورق های فولادی ذوزنقه ای و تخته های سیمانی الیافی به عنوان سقف های پیش ساخته (سازگار با سیستم سازه ای قاب های فولادی سبک) به بررسی پارامترهای موثر بر صلبیت سقف، پرداخته می شود. در تحقیق حاضر ابتدا به مدل سازی دو نمونه سقف آزمایش شده، به روش اجزاء محدود با استفاده از نرم افزار تحلیلی abaqus ver 6.10 پرداخته شده است. نمونه های ساخته شده تحت اعما...
A Fresh Approach to the Study of Atmospheric Turbidity
The ~roblem of assessment of atmospheric turbidity caused by aerosol particles, vie., dust, smoke, haze, and other atmospheric pollutants, apart from the effect of variable water vapour content of the atmosphere, has been studied efreeh. The basic concept mderlying Linke's turbidity factor, T , has been found to be theoretically sound, dthough its quantitative formulation suffers from one major...
متن کاملDETERMINATIONS OF ATMOSPHERIC TURBIDITY AND WATER VAPOR CONTENT By HERBERT
In.troduction.-Early in 1931, at a meeting of the commission on solar radiation of the section of meteorology, International Geodetic and Geophysical Union, in Potsdam and Berlin, Germany, after a thorough discussion it was voted to recommend to the national branches of the Union that they cooperate in a world-wide study of the dustiness or turbidity of the atmosphere, and also of the water vap...
متن کاملSeasonal and Interannual Variability in Atmospheric Turbidity over South Africa
Aerosols affect climate by attenuating solar radiation and acting as cloud condensation nuclei. Despite their importance in the climate system, our understanding of the time-space variability of aerosols is fragmentary. Measurements and reliable estimates of atmospheric turbidity—the total column amount of aerosol—are scarce in most countries and this is especially true in the Southern Hemisphe...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
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ژورنال
عنوان ژورنال: Tellus
سال: 1964
ISSN: 0040-2826,2153-3490
DOI: 10.3402/tellusa.v16i1.8885