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RIVF
2003
15 years 7 months ago
Airspace Sectorization By Constraint Programming
—In this paper we consider the Airspace Sectorization Problem (ASP) where airspace has to be partitioned into a number of sectors, each sector being assigned to a team of air tra...
Huy Trandac, Philippe Baptiste, Vu Duong
SODA
2003
ACM
133views Algorithms» more  SODA 2003»
15 years 7 months ago
Integrality ratio for group Steiner trees and directed steiner trees
The natural relaxation for the Group Steiner Tree problem, as well as for its generalization, the Directed Steiner Tree problem, is a flow-based linear programming relaxation. We...
Eran Halperin, Guy Kortsarz, Robert Krauthgamer, A...
DKE
2008
158views more  DKE 2008»
15 years 6 months ago
Integration and verification of semantic constraints in adaptive process management systems
Adaptivity in process management systems is key to their successful applicability in practice. Approaches have been already developed to ensure system correctness after arbitrary ...
Linh Thao Ly, Stefanie Rinderle, Peter Dadam
BMCBI
2006
92views more  BMCBI 2006»
15 years 6 months ago
Recrafting the neighbor-joining method
Background: The neighbor-joining method by Saitou and Nei is a widely used method for constructing phylogenetic trees. The formulation of the method gives rise to a canonical (n3)...
Thomas Mailund, Gerth Stølting Brodal, Rolf...
ECCC
2006
88views more  ECCC 2006»
15 years 6 months ago
Hardness of Directed Routing with Congestion
Given a graph G and a collection of source-sink pairs in G, what is the least integer c such that each source can be connected by a path to its sink, with at most c paths going th...
Julia Chuzhoy, Sanjeev Khanna