2853 search results - page 135 / 571 » On the Efficiency of Provenance Queries |
187
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SIGMOD
2004
ACM
16 years 6 months ago
2004
ACM
Existing SQL aggregate functions present important limitations to compute percentages. This article proposes two SQL aggregate functions to compute percentages addressing such lim...
241
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COMAD
2009
15 years 7 months ago
2009
An ontology is an explicit specification of shared conceptualization. The Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies, a...
163
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MONET
2002
15 years 6 months ago
2002
Many cache management schemes designed for mobile environments are based on invalidation reports (IRs). However, IR-based approach suffers from long query latency and it cannot eff...
146
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ICMCS
2006
IEEE
16 years 14 days ago
2006
IEEE
Space requirement for storing indexes and performance for query processing are two critical issues in music information retrieval (MIR) system. To overcome difficulties in variabl...
178
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DCOSS
2007
Springer
15 years 10 months ago
2007
Springer
Sensor networks are often used to sense the physical world and provide observations for various uses. In hostile environments, it is critical to control the network access to ensur...