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» Efficient Aggregation of Ranked Inputs
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PVLDB
2008
116views more  PVLDB 2008»
14 years 9 months ago
Tighter estimation using bottom k sketches
Summaries of massive data sets support approximate query processing over the original data. A basic aggregate over a set of records is the weight of subpopulations specified as a ...
Edith Cohen, Haim Kaplan
PCI
2005
Springer
15 years 2 months ago
A Graphical Rule Authoring Tool for Defeasible Reasoning in the Semantic Web
Defeasible reasoning is a rule-based approach for efficient reasoning with incomplete and inconsistent information. Such reasoning is useful for many applications in the Semantic W...
Nick Bassiliades, Efstratios Kontopoulos, Grigoris...
DEBS
2008
ACM
14 years 11 months ago
Speculative out-of-order event processing with software transaction memory
In event stream applications, events flow through a network of components that perform various types of operations, e.g., filtering, aggregation, transformation. When the operatio...
Andrey Brito, Christof Fetzer, Heiko Sturzrehm, Pa...
CGF
2008
128views more  CGF 2008»
14 years 9 months ago
Hierarchical Convex Approximation of 3D Shapes for Fast Region Selection
Given a 3D solid model S represented by a tetrahedral mesh, we describe a novel algorithm to compute a hierarchy of convex polyhedra that tightly enclose S. The hierarchy can be b...
Marco Attene, Michela Mortara, Michela Spagnuolo, ...
ECAI
2008
Springer
14 years 11 months ago
Optimizing Causal Link Based Web Service Composition
Automation of Web service composition is one of the most interesting challenges facing the Semantic Web today. Since Web services have been enhanced with formal semantic descriptio...
Freddy Lécué, Alexandre Delteil, Ala...