Air terminations must be strategically positioned at high-risk points to prevent lightning bypass. The likelihood of a direct strike on building can evaluated using the dynamic electro-geometrical model (DEGM), which considers geometric proximity orientation in spaces around structure meshed structure. This study evaluates probability simple structures and maximum currents that may DEGM concept...

during recent years oil products has decreased because of growing population and increasing demand to oil products and decreasing of crude oil extraction at compare to export. however, to achieve suitable levels of production, the use of improved technologies should be considered. another way to prevent the evaporation and leakage from oil storage tanks and their products are using of storage t...

In this article a new method is introduced for the automatic estimation of all relevant parameters oil storage tanks using single high-resolution synthetic aperture radar (SAR) image. For given tank, will estimate its maximum capacity and determine whether it has fixed or floating roof. with roof, amount stored also be estimated. If SAR time series available images can processed jointly, exploi...

Youth gangs are on the rise. Today they threaten virtually every major city, many small communities, and even rural areas. The Office of Juvenile Justice and Delinquency Prevention (OJJDP) is committed to helping communities overcome this problem, and an essential first step is understanding the factors that contribute to the growth of youth gangs and the relationship of gang membership to deli...

The epiphysial region of the dorsal diencephalon is the first site at which neurogenesis occurs in the roof of the zebrafish forebrain. We show that the homeobox containing gene floating head (flh) is required for neurogenesis to proceed in the epiphysis. In flh- embryos, the first few epiphysial neurons are generated, but beyond the 18 somite stage, neuronal production ceases. In contrast, in ...

characteristics of efficient roof shape is a part of configuration of efficient architecture which seems to be an ideal in contemporary architecture especially in contemporary architecture of developing countries such as iran. this study is to investigate two roof shapes in view of air flow and indoor-temperature to find efficient roofs shapes for residential buildings in tehran. computational ...