nowadays, due to inherent complexity of real optimization problems, it has always been a challenging issue to develop a solution algorithm to these problems. single row facility layout problem (srflp) is a np-hard problem of arranging a number of rectangular facilities with varying length on one side of a straight line with aim of minimizing the weighted sum of the distance between all facility...

in this paper, we investigate infinite product representation of the solution of a sturm-liouville equation with an indefinite weight function which has two zeros and/or singularitiesin a finite interval. first, by using of the asymptotic estimates provided in [w. eberhard, g.freiling, k. wilcken-stoeber, indefinite eigenvalue problems with several singular pointsand turning points, math. nachr...

generally, this article deals with the challenges and solutions facing the internet security. first, the article discusses the following subjects: the security of communication and information networks, the importance of the networks, the networks security precedence internet and computers crimes, the beginning of computer crimes, classifying computer crimes as well as the solutions proposed to...

leprosy is one of the oldest diseases of the country and may have been brought over to this country from egypt in ancient times. leprosy is mose frequent in the province of tehran, east azarbaijan, guilan and mazandaran (43 per km2) than other part of the country (13-18 per km2).the incidence of leprosy is recorded at 7.7 per thousand and 35.2 per thousand in the southern and northern part of t...