نتایج جستجو برای: ohsas 1800
تعداد نتایج: 7959 فیلتر نتایج به سال:
Local history is beginning to emerge from the shadows in which it has lain for too long. Tainted for decades by its association with antiquarianism, its struggle for academic respectability has been a long one. Of course there have been academic practitioners, notably those associated with the Department of English Local History at the University of Leicester; nevertheless, the general impressi...
The World Heritage Site of Great Zimbabwe is one of the most iconic and largest archaeological settlements in Africa. It was the hub of direct and indirect trade which internally connected various areas of southern Africa, and externally linked them with East Africa and the Near and Far East. Archaeologists believe that at its peak, Great Zimbabwe had a fully urban population of 20,000 people c...
This study investigates the effect of participative political institutions (PPIs) that emerged in many central European cities from the late 13th century. The empirical analysis of the paper is based on newly compiled long-run data for the existence of different types of PPIs in 104 cities in the Holy Roman Empire. The effect of both an overall index of participativeness of political institutio...
مقدمه: با افزایش کاربری تلفن همراه در مکان های عمومی، استفاده از دستگاه های مسدودکننده امواج نیز افزایش یافته است، لذا هدف این مطالعه ارزیابی اثر امواج مسدود کننده تلفن همراه بر سطح اضطراب موش سوری بوده است. روش ها: در این طرح از 40 سر موش سوری نر و 40 سر موش ماده با وزن 30-25 گرم استفاده شد و هر دو جنس به صورت تصادفی به 4 گروه آزمایشی (کنترل، تابش 900 مگاهرتز، 1800 مگاهرتز و 1800+ 900 مگاهرتز)...
Field investigations were conducted to determine the resting locations of codling moth (Cydia pomonella [L.]) (Lepidoptera: Tortricidae) males and females in mating disrupted and nondisrupted apple (Malus domestica Borkh.) orchard plots. A custom-made sampling device, consisting of a leaf blower converted into a powerful vacuum, yielded 20-24% success in recovering marked moths, released in th...
Abstract The two-part roundtable Constructing Race and Architecture 1400–1800 consists of brief “think pieces” that examine issues related to the intersection race architecture from around globe during period 1400–1800. first part appeared in September 2021 issue JSAH, Part 2 appears this issue, featuring contributions by Rachel A. Engmann, Laura Fernández-González, Mark Hinchman, Dana E. Katz,...
The Google Books Ngram Viewer allows researchers to quantify culture across centuries by searching millions of books. This tool was used to test theory-based predictions about implications of an urbanizing population for the psychology of culture. Adaptation to rural environments prioritizes social obligation and duty, giving to other people, social belonging, religion in everyday life, authori...
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