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**public sources and our publisher partners.**The background and development of a multicategory direct observation system, the Behavior Observation Instrument (BOI), is described. This time-sampling procedure for recording the behavior of… Expand

We present an optimal algorithm to reconstruct the planar cross section of a simple object from data points measured by rays. The rays are semi-infinite curves representing, for example, the laser… Expand

Proceedings, International Conference on…

The authors present a strategy for discovering the exact shape of a simple (but not necessarily convex) polygon by means of a minimal number of simple probes. When each probe outcome consists of a… Expand

In this paper, we study a cell of the subdivision induced by a union of n half lines (or rays) in the plane. We present two results. The first one is a novel proof of the O(n) bound on the number of… Expand

We present algorithms to reconstruct the planar cross-section of a simply connected object from data points measured by rays. The rays are semi-infinite curves representing, for example, the laser… Expand

In this paper we study a cell of the subdivision induced by a union ofn half-lines (or rays) in the plane. We present two results. The first one is a novel proof of theO(n) bound on the number of… Expand

PROOF. Without loss of generality we assume that S = {el . . . . . e,} is a connected set of segments, otherwise the argument is applied separately to each connected component of S. In addition, we… Expand

Cette these presente un travail de recherche en Algorithmique Geometrique et en Robotique concernant les arrangements de rayons dans le plan. Un rayon est une courbe semi-infinie qui represente par,… Expand