s:2728:"Background: Rapid industrialization, environmental pollution, changing living conditions and unfavourable working conditions cause stress to the people which may play an important role in developing several disorders. Sress is one of the most important health and social problems. Physchological stress has long been suspected of having an important impact on infertility . There is a grea...

Background: Infertility is defined as inability to conceive after a year of sexual intercourses without the use of contraceptives. In half of the cases the causative factor is the male. Males are exposed to the effect of various environmental factors, which may decrease their reproductive capabilities. Phone electromagnetic power is very small, only a few hundredths of a microwave oven, but bec...

We formulate path integrals on any Riemannian manifold which admits the action of a compact Lie group by isometric transformations. We consider a path integral on a Riemannian manifold M on which a Lie group G acts isometrically. Then we show that the path integral onM is reduced to a family of path integrals on a quotient space Q =M/G and that the reduced path integrals are completely classifi...

This paper introduces a variant of the vehicle routing problem with time windows where a limited number of vehicles is given (m-VRPTW). Under this scenario, a feasible solution is one that may contain either unserved customers and/or relaxed time windows. We provide a computable upper bound to the problem. To solve the problem, we propose a tabu search approach characterized by a holding list a...

The problem of making sequential decisions in unknown probabilistic environments is studied. In cycle t action yt results in perception xt and reward rt, where all quantities in general may depend on the complete history. The perception xt and reward rt are sampled from the (reactive) environmental probability distribution . This very general setting includes, but is not limited to, (partial ob...

objective(s) rapidly growing mycobacteria (rgm) are capable of producing diseases in humans. since mycobacteria vary in their susceptibility, precise identification is critical for adoption of correct drug therapy. the main aim of this study was molecular identification and evaluation of antimicrobial susceptibility pattern of iranian clinically isolated myocbacterium fortuitum. materials and m...

A connected graph G is k-geodetically connected (k-GC) if the removal of less than k vertices does not affect the distances (lengths of the shortest paths) between any pair of the remaining vertices. As such graphs have important applications in robust system designs, we are interested in theminimumnumber of edges required tomake a k-GC graph of order n, and characterizing those minimum k-GC gr...

as a S1-valued Morse function on A/G, A being the space of SU(2) connections onM and G the group of gauge transformations. Taubes realized that the Hessian of the Chern-Simons invariant and the odd signature operator coupled to the same path of SU(2) connections have the same spectral flow. Using Taubes’s point of view, an SU(3) Casson invariant τ was introduced by [1] and later refined by [3],...

Stor y s p ace, a hy p er text wr i ti ng env i r onm ent, has been w i dely us ed for wri ti ng, read i ng, and res ear ch for near ly f i fteen year s. Th e ap p ear ance of a new im p lem entati on p r ov i d es a sui table occas i on to rev i ew th e des i gn of Stor y s p ace, both in its hi s tor i cal context and in th e context of contem p or ar y res ear ch . Of par ti cu lar inter es ...

It is known that the spectral radius of a digraph with k edges is ≤ √ k, and that this inequality is strict except when k is a perfect square. For k = m + l, l fixed, m large, Friedland showed that the optimal digraph is obtained from the complete digraph onm vertices by adding one extra vertex, and a corresponding loop, and then connecting it to the first ⌊l/2⌋ vertices by pairs of directed ed...