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XSYM
2005
Springer
114views Database» more  XSYM 2005»
14 years 2 months ago
XPathMark: An XPath Benchmark for the XMark Generated Data
We propose XPathMark, an XPath benchmark on top of the XMark generated data. It consists of a set of queries which covers
Massimo Franceschet
CCCG
2007
13 years 10 months ago
A Lower Bound on the Area of a 3-Coloured Disc Packing
Given a set of unit-discs in the plane with union area A, what fraction of A can be covered by selecting a pairwise disjoint subset of the discs? Rado conjectured
Peter Brass, Ferran Hurtado, Benjamin J. Lafrenier...
SODA
1997
ACM
115views Algorithms» more  SODA 1997»
13 years 10 months ago
Faster Construction of Planar Two-Centers
Improving on a recent breakthrough of Sharir, we find two minimum-radius circular disks covering a planar point set, in randomized expected time O(n log2 n).
David Eppstein
ALGORITHMICA
2008
88views more  ALGORITHMICA 2008»
13 years 9 months ago
Exact Algorithms for Exact Satisfiability and Number of Perfect Matchings
We present exact algorithms with exponential running times for variants of n-element set cover problems, based on divide-and-conquer and on inclusion
Andreas Björklund, Thore Husfeldt
ECCC
2006
80views more  ECCC 2006»
13 years 9 months ago
Packing to angles and sectors
In our problem we are given a set of customers, their positions on the plane and their demands. Geometrically, the area covered by a directional antenna with parameters , ,
Piotr Berman, Jieun K. Jeong, Shiva Prasad Kasivis...