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Objectives. The purpose of this study was to assess living and workplace safety conditions of construction workers in Tehran, Iran. Methods. This cross-sectional study was conducted among 410 construction sites in a municipal area of Tehran whose municipal building permits were issued in 2011. Data on ventilation, workplace safety and hygiene were collected by direct observation and interviews with...
One of the most important factors in artificial pollution test of insulators is the source parameter. Several researches have been performed for ceramic insulators; however fewer investigations for composite insulators have been done. In this paper it has been demonstrated that for a cascade setup, adding an output capacitor could improve the test setups for testing of composite insulators. Besides...
The history of semiconductor devices has been characterised by a constant drive towards lower dimensions in order to increase integration density, system functionality and performance. However, this is still far from being comparable with the performance of natural systems such as human brain. The challenges facing semiconductor technologies in the millennium will be to move towards miniaturisation...
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