Let P and Q be two disjoint simple polygons having n sides each. We present an al-gorithm which determines whether Q can be moved by a single translation to a posi-tion sufficiently far from P, and which produces all such motions if they exist. The al-gorithm runs in time O(t(n)) where t(n) is the time needed to triangulate an n-sidedpolygon. Since Tarjan and Van Wyk have re...

chondroectodermal dysplasia (ellis-van creveld syndrome) is a rare autosomal recessive congenital abnormality. this syndrome is characterized by a spectrum of clinical findings, among which chondrodystrophy, polydactyly, ectodermal dysplasia, and congenital cardiac anomalies are the most common. it is imperative to not overlook the cardiac complications in patients with this syndrome during den...

A computer program in a conventional (imperative) language provides an explicit sequence of instructions by which to compute the desired answer. A program in a declarative language, by contrast, expresses conditions that the answer should satisfy; it is up to an implementation of the language to compute an appropriate answer. The usefulness of declarative programming has been recognized for dec...