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» Conjunctive Queries over Trees
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DOCENG
2004
ACM
15 years 3 months ago
Presenting the results of relevance-oriented search over XML documents
In this paper, we discuss how to present the result of searching elements of any type from XML documents relevant to some information need (relevance-oriented search). As the resu...
Alda Lopes Gançarski, Pedro Rangel Henrique...
ICDE
2010
IEEE
174views Database» more  ICDE 2010»
14 years 7 months ago
Semantic flooding: Search over semantic links
Abstract-- Classification hierarchies are trees where links codify the fact that a node lower in the hierarchy contains documents whose contents are more specific than those one le...
Fausto Giunchiglia, Uladzimir Kharkevich, Alethia ...
COMAD
2008
14 years 11 months ago
Concurrency Control in Distributed MRA Index Structure
Answering aggregate queries like sum, count, min, max over regions containing moving objects is often needed for virtual world applications, real-time monitoring systems, etc. Sin...
Neha Singh, S. Sudarshan
PODS
2007
ACM
159views Database» more  PODS 2007»
15 years 9 months ago
Generalized hypertree decompositions: np-hardness and tractable variants
The generalized hypertree width GHW(H) of a hypergraph H is a measure of its cyclicity. Classes of conjunctive queries or constraint satisfaction problems whose associated hypergr...
Georg Gottlob, Thomas Schwentick, Zoltán Mi...
85
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EUC
2006
Springer
15 years 1 months ago
Cross-Layer Duty Cycle Scheduling with Data Aggregation Routing in Wireless Sensor Networks
Abstract. Well-scheduled communications, in conjunction with the aggregation of data reduce the energy waste on idle listening and redundant transmissions. In addition, the adjusta...
Yean-Fu Wen, Frank Yeong-Sung Lin