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The aim of this paper is to gather several new results concerning the enumera-tion of specific classes of polycubes. We first consider two classes of 3-dimensional vertically-convex directed polycubes: the plateau polycubes and the parallelogram polycubes. An expression of the generating function is provided for the former class, as well as an asymptotic(More)
In this paper, we propose a qualitative formalism for representing and reasoning about time at different scales. It extends the algebra of Euzenat [2001] and overcomes its major limitations, allowing one to reason about relations between points and intervals. Our approach is more expressive than the other algebras of temporal relations: for instance , some(More)
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