Particle swarm optimization cannot guarantee convergence to the global optimum on multi-modal functions, so multiple swarms can be useful. One means to coordinate these swarms is to use a separate search mechanism to identify different regions of the solution space for each swarm to explore. The expectation is that these independent subswarms can each perform an effective search around the regi...

For the edge e = uv of a graph G, let nu = n(u|G) be the number of vertices of G lying closer to the vertex u than to the vertex v and nv= n(v|G) can be defined simailarly. Then the ABCGG index of G is defined as ABC...

In this paper we investigate the problem of optimal priority assignment in fixed priority pre-emptive single processor systems where tasks have probabilistic execution times. We identify three sub-problems which optimise different metrics related to the probability of deadline failures. For each sub-problem we propose an algorithm that is proved optimal. The first two algorithms are inspired by...

Abstract In the coldest (10–20 K) regions of interstellar medium, icy surfaces grains serve as solid-state supports for chemical reactions. Among their plausible roles, that third body is advocated, in which reaction energies surface reactions dissipate throughout grain, stabilizing product. This energy dissipation process poorly understood at atomic scale, although it can have a high impact on...

Recently, Durante and Jaworski (2008) [6] have proved that the class of absolutely continuous copulas with a given diagonal section is non-empty in case that the diagonal function is such that the set of points where this coincides with the identity function has null-measure. In this paper, we show that if we consider sub-diagonals (or super-diagonals), then the framework changes. Concretely, f...

A task-oriented system structure has been developed. In normal industrial robot programming, the path is created and the process is based on the path. Here a process-focused method is proposed, where a task can be split in sub-tasks, one for each part of the process with similar process-characteristics. By carefully encapsulating the information needed to execute a sub-task, this component can ...

Tow new compound of type [(chelate)2Cu-OH-Cu(chelate)2] X3.nH2O, where chelate=1,10-phenanthroline; X=Cl¯(n=3.5) and chelate=4,4'-dimethyl-2,2'-bipyridine;  (n=5) have been synthesized and their properties investigated. The complexes show room temperature magnetic moment order of 1.0 B.M. per copper atom. The X-band ESR spectrum of powdered sample...

In this paper, we study the sub-coloring and hypo-coloring problems on interval graphs. These problems have applications in job scheduling and distributed computing and can be used as “subroutines” for other combinatorial optimization problems. In the sub-coloring problem, given a graph G, we want to partition the vertices of G into minimum number of sub-color classes, where each sub-color clas...

In this paper, we propose an efficient method for incorporating the knowledge of global (worst case of on-die, across die, across wafers, and across wafer lots) and local (worst case on-die) process variations into a systematic framework for identifying delay marginalities in a design during first-silicon validation. With the goal of significantly reducing the number of vectors required for val...