A design algorithm is derived, for a calculating minimum allowable electrical clearances in alternating and direct current “permissible” equipments, which are authorized to operate in gassy mines and tunnels under Part 18 of Title 30, Code of Federal Regulations [1]. The calculated clearances apply to operations at altitudes ranging up to 12 000 ft (3658 m) above sea level. The minimum allowabl...

Cover crops are a critical component of sustainable agroecosystems, yet their performance in semi-arid environments with short growing seasons and highly variable precipitation is inconsistent. To evaluate productivity stability single species vs. multi-species cover crop plantings water input, were evaluated at two sites North Dakota under dryland plus irrigation conditions. treatments consist...

today, the real problem in iran is a supply and demand problem in all aspects of the economy. from skilled and semi- skilled manapower (ssm) perspective, supply and demand are repidly changing but in opposite directions (ellig, 1990). on the demand side, the emphasis is on a skilled and semi- skilled workforce, but on the supply side, entrylevel workers are high school graduates who are functio...

semi-regular locales are extensions of the classical semiregularspaces. we investigate the conditions such that semi-regularizationis a functor. we also investigate the conditions such that semi-regularizationis a reflection or coreflection.

    Molecular epidemiology is a subdivision of medical science and epidemiology that emphases on the involvement of potential environmental and genetic risk factors, recognized at the molecular level, to the etiology and avoidance of sickness through populations. This arena has developed from the combination of molecular biology and traditional epidemiological research. Molecular...