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» Logic, language, information and computation
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SIGIR
2006
ACM
16 years 24 days ago
LDA-based document models for ad-hoc retrieval
Search algorithms incorporating some form of topic model have a long history in information retrieval. For example, cluster-based retrieval has been studied since the 60s and has ...
Xing Wei, W. Bruce Croft
WWW
2006
ACM
16 years 7 months ago
Using semantic rules to determine access control for web services
Semantic Web technologies are bring increasingly employed to solve knowledge management issues in traditional Web technologies. This paper follows that trend and proposes using Se...
Brian Shields, Owen Molloy, Gerard Lyons, Jim Dugg...
SIGMOD
2009
ACM
202views Database» more  SIGMOD 2009»
16 years 7 months ago
ZStream: a cost-based query processor for adaptively detecting composite events
Composite (or Complex) event processing (CEP) systems search sequences of incoming events for occurrences of userspecified event patterns. Recently, they have gained more attentio...
Yuan Mei, Samuel Madden
PODS
2004
ACM
158views Database» more  PODS 2004»
16 years 7 months ago
Composing Schema Mappings: Second-Order Dependencies to the Rescue
A schema mapping is a specification that describes how data structured under one schema (the source schema) is to be transformed into data structured under a different schema (the...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
ICDT
2010
ACM
180views Database» more  ICDT 2010»
15 years 10 months ago
Composing local-as-view mappings: closure and applications
Schema mapping composition is a fundamental operation in schema management and data exchange. The mapping composition problem has been extensively studied for a number of mapping ...
Patricia C. Arocena, Ariel Fuxman, Renée J....