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GIS
2006
ACM
16 years 3 months ago
Generalization of land cover maps by mixed integer programming
We present a novel method for the automatic generalization of land cover maps. A land cover map is composed of areas that collectively form a tessellation of the plane and each ar...
Jan-Henrik Haunert, Alexander Wolff
SIGMOD
2009
ACM
184views Database» more  SIGMOD 2009»
16 years 2 months ago
Minimizing the communication cost for continuous skyline maintenance
Existing work in the skyline literature focuses on optimizing the processing cost. This paper aims at minimization of the communication overhead in client-server architectures, wh...
Zhenjie Zhang, Reynold Cheng, Dimitris Papadias, A...
202
Voted
SIGMOD
2008
ACM
210views Database» more  SIGMOD 2008»
16 years 2 months ago
Private queries in location based services: anonymizers are not necessary
Mobile devices equipped with positioning capabilities (e.g., GPS) can ask location-dependent queries to Location Based Services (LBS). To protect privacy, the user location must n...
Gabriel Ghinita, Panos Kalnis, Ali Khoshgozaran, C...
PODS
2007
ACM
159views Database» more  PODS 2007»
16 years 2 months ago
Generalized hypertree decompositions: np-hardness and tractable variants
The generalized hypertree width GHW(H) of a hypergraph H is a measure of its cyclicity. Classes of conjunctive queries or constraint satisfaction problems whose associated hypergr...
Georg Gottlob, Thomas Schwentick, Zoltán Mi...
BMCBI
2010
108views more  BMCBI 2010»
14 years 11 months ago
BIGSdb: Scalable analysis of bacterial genome variation at the population level
Background: The opportunities for bacterial population genomics that are being realised by the application of parallel nucleotide sequencing require novel bioinformatics platforms...
Keith A. Jolley, Martin C. J. Maiden