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SIGMOD
2007
ACM
14 years 10 months ago
2007
ACM
An emerging challenge in modern distributed querying is to efficiently process multiple continuous aggregation queries simultaneously. Processing each query independently may be i...
SIGMOD
2007
ACM
14 years 10 months ago
2007
ACM
Sensor networks are widely used in many applications for collecting information from the physical environment. In these applications, it is usually necessary to track the relation...
OTM
2009
Springer
14 years 4 months ago
2009
Springer
Abstract. Ontologies have become very popular in life sciences and other domains. They mostly undergo continuous changes and new ontology versions are frequently released. However,...
ICDE
2001
IEEE
14 years 11 months ago
2001
IEEE
We propose an extension to current view-based mediator systems called model-based mediation, in which views are defined and executed at the level of conceptual models (CMs) rather...
ICDE
2001
IEEE
14 years 11 months ago
2001
IEEE
Spatial Joins are important and time consuming operations in spatial database management systems. It is crucial to be able to accurately estimate the performance of these operatio...