782 search results - page 94 / 157 » Online communities as communities of practice: a case study |
157
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ALGORITHMICA
2002
15 years 6 months ago
2002
In recent years there has been an upsurge of interest in spatial databases. A major issue is how to manipulate efficiently massive amounts of spatial data stored on disk in multidi...
147
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AAAI
2006
15 years 7 months ago
2006
Clustering under constraints is a recent innovation in the artificial intelligence community that has yielded significant practical benefit. However, recent work has shown that fo...
194
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ICDIM
2010
IEEE
15 years 3 months ago
2010
IEEE
In a set of access control policies, incompleteness is the existence of situations for which no policy applies. Some of these situations can be exploited by attackers, to obtain un...
165
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ESCIENCE
2007
IEEE
15 years 10 months ago
2007
IEEE
This paper presents the formal syntax and the operational semantics of Taverna, a workflow management system with a large user base among the e-Science community. Such formal foun...
126
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IJCAI
2007
15 years 7 months ago
2007
In many real-world collective decision problems, the set of alternatives is a Cartesian product of finite value domains for each of a given set of variables. The prohibitive size...