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COMPGEOM
2006
ACM
15 years 7 months ago
Algorithms for two-box covering
We study the problem of covering a set of points or polyhedra in 3 with two axis-aligned boxes in order to minimize a function of the measures of the two boxes, such as the sum or...
Esther M. Arkin, Gill Barequet, Joseph S. B. Mitch...
COMPGEOM
2006
ACM
15 years 7 months ago
Envelope surfaces
We construct a class of envelope surfaces in Rd , more precisely envelopes of balls. An envelope surface is a closed C1 (tangent continuous) manifold wrapping tightly around the u...
Nico Kruithof, Gert Vegter
ISPD
2006
ACM
175views Hardware» more  ISPD 2006»
15 years 7 months ago
mPL6: enhanced multilevel mixed-size placement
The multilevel placement package mPL6 combines improved implementations of the global placer mPL5 (ISPD05) and the XDP legalizer and detailed placer (ASPDAC06). It consistently pr...
Tony F. Chan, Jason Cong, Joseph R. Shinnerl, Kent...
SMI
2005
IEEE
15 years 7 months ago
Two-Dimensional Visibility Charts for Continuous Curves
This paper considers computation of visibility for twodimensional shapes whose boundaries are C1 continuous curves. We assume we are given a one-parameter family of candidate view...
Gershon Elber, Robert Sayegh, Gill Barequet, Ralph...
SAC
2005
ACM
15 years 7 months ago
An attribute-based access matrix model
In traditional access control models like MAC, DAC, and RBAC, authorization decisions are determined according to identities of subjects and objects, which are authenticated by a ...
Xinwen Zhang, Yingjiu Li, Divya Nalla