In this article, we survey machine repair problems (MRP) with an emphasis on historical developments of queuing models of practical importance. The survey proceeds historically, starting with developments in 1985, when the first published review on machine interference models appeared. We attempt to elaborate some basic MRP models of the real life congestion situations. The brief survey of some...

This thesis focuses on the Fast Multipole Method which hierarchically solves the N-body problem with a linear operation count for any given precision. When considering Laplace equation, we aim at treating efficiently all particle distributions that arise in astrophysics and in molecular dynamics. We first study two different expressions of the main operator (“multipole-to-local”) as well as the...

 Minimum and maximum operators are two well-known t-norm and s-norm used frequently in fuzzy systems. In this paper, two different types of fuzzy inequalities are simultaneously studied where the convex combination of minimum and maximum operators is applied as the fuzzy relational composition. Some basic properties and theoretical aspects of the problem are derived and four necessary and suffi...

Quantum digital signatures can be used to authenticate classical messages in an information-theoretically secure way. Previously, a novel quantum digital signature for classical messages has been proposed and gave an experimental demonstration of distributing quantum digital signatures from one sender to two receivers. Some improvement versions were subsequently presented, which made it more fe...

1. Abstract 2. Introduction 3. Results 3.1. Striatin-like proteins are conserved in eukaryotes 3.2. Striatin, SG2NA, and zinedin form separate phylogenetic clusters 3.3. Striatin families are characterized by a number of conserved motifs 3.4. Members of the striatin family have their characteristic motifs 3.5. Striatin homologs in lower eukaryotes also contain conserved motifs 3.6. Striatin fam...

location-allocation is a combinatorial optimization problem, and is defined as non deterministic polynomial hard (np) hard optimization. therefore, solution of such a problem should be shifted from exact to heuristic or meta heuristic due to the complexity of the problem. locating medical centers and allocating injuries of an earthquake to them has high importance in earthquake disaster managem...