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CIKM
2009
Springer
15 years 11 months ago
Towards a universal wordnet by learning from combined evidence
Lexical databases are invaluable sources of knowledge about words and their meanings, with numerous applications in areas like NLP, IR, and AI. We propose a methodology for the au...
Gerard de Melo, Gerhard Weikum
PODS
2000
ACM
102views Database» more  PODS 2000»
15 years 9 months ago
Linear Approximation of Planar Spatial Databases Using Transitive-Closure Logic
We consider spatial databases in the plane that can be defined by polynomial constraint formulas. Motivated by applications in geographic information systems, we investigate line...
Floris Geerts, Bart Kuijpers
ICDT
1999
ACM
154views Database» more  ICDT 1999»
15 years 9 months ago
Databases for Tracking Mobile Units in Real Time
Abstract. In this paper we consider databases representing information about moving objects (e.g. vehicles), particularly their location. We address the problems of updating and qu...
Ouri Wolfson, Liqin Jiang, A. Prasad Sistla, Sam C...
CIKM
2006
Springer
15 years 8 months ago
Describing differences between databases
We study the novel problem of efficiently computing the update distance for a pair of relational databases. In analogy to the edit distance of strings, we define the update distan...
Heiko Müller, Johann Christoph Freytag, Ulf L...
CSREASAM
2009
15 years 6 months ago
A Stochastic Model of the Damage Propagation in Database Systems
Security defense tools like firewalls and antivirus softwares are not sufficient to defend against dynamic threats to database systems. Successful attacks could not only seriously ...
Hai Wang, Su Yan