the art of carpet weaving has undergone changes during the course of history. this ancient art has gradually found its place among other branches of art due to its artistic and consumer characteristics. the art of carpet weaving has heavily influenced other fields like painting for its elegant ornamentation. this paper will elaborate on the widespread relations between persian and italian art d...

In a recent paper, Durán, Gravano, McConnell, Spinrad and Tucker described an algorithm of complexity O(n2) for recognizing whether a graph G with n vertices and m edges is a unit circular-arc (UCA) graph. Furthermore the following open questions were posed in the above paper: (i) Is it possible to construct a UCA model for G in polynomial time?; (ii) Is it possible to construct a UCA model, wh...

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In cancer epidemiology, prospective approaches are very important both in testing etiological hypotheses and in evaluating preventive procedures. Prospective studies, however, are very difficult and expensive, because a large number of people and a long period of observation are necessary for a satisfactory study. As a data source for follow-up studies, population-based cancer registry is very ...