281 search results - page 49 / 57 » A Case for A Collaborative Query Management System |
WSDM
2009
ACM
15 years 4 months ago
2009
ACM
There has been considerable past work on efficiently computing top k objects by aggregating information from multiple ranked lists of these objects. An important instance of this...
WOWMOM
2005
ACM
15 years 3 months ago
2005
ACM
We consider the energy consumed in radio transmission of a set of sensors forming a data gathering wireless network. Our objective is to enhance the lifetime of such networks by e...
77
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VLDB
2002
ACM
14 years 9 months ago
2002
ACM
Whereas traditional databases manage only deterministic information, many applications that use databases involve uncertain data. This paper presents a Probabilistic Tree Data Bas...
104
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ICCS
2009
Springer
15 years 4 months ago
2009
Springer
Abstract. In knowledge bases, the open world assumption and the ability to express variables may lead to an answer redundancy problem. This problem occurs when the returned answers...
POLICY
2004
Springer
15 years 2 months ago
2004
Springer
We study the specification of access control policy in large-scale distributed systems. Our work on real-world policies has shown that standard policy idioms such as role hierarc...