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PODS
2007
ACM
159views Database» more  PODS 2007»
16 years 6 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...
EDBT
2004
ACM
139views Database» more  EDBT 2004»
16 years 6 months ago
GRIDS, Databases, and Information Systems Engineering Research
GRID technology, emerging in the late nineties, has evolved from a metacomputing architecture towards a pervasive computation and information utility. However, the architectural de...
Keith G. Jeffery
EDBT
2008
ACM
106views Database» more  EDBT 2008»
16 years 6 months ago
Highly scalable trip grouping for large-scale collective transportation systems
Transportation?related problems, like road congestion, parking, and pollution, are increasing in most cities. In order to reduce traffic, recent work has proposed methods for vehi...
Gyözö Gidófalvi, Torben Bach Pede...
ICSE
2004
IEEE-ACM
16 years 6 months ago
Validating the Unit Correctness of Spreadsheet Programs
Financial companies, engineering firms and even scientists create increasingly larger spreadsheets and spreadsheet programs. The creators of large spreadsheets make errors and mus...
Tudor Antoniu, Paul A. Steckler, Shriram Krishnamu...
SDM
2009
SIAM
180views Data Mining» more  SDM 2009»
16 years 3 months ago
Structure and Dynamics of Research Collaboration in Computer Science.
Complex systems exhibit emergent patterns of behavior at different levels of organization. Powerful network analysis methods, developed in physics and social sciences, have been s...
Andre Nash, Christian Bird, Earl T. Barr, Premkuma...