1527 search results - page 258 / 306 » Data Integration by Describing Sources with Constraint Datab... |
142
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CCS
2007
ACM
15 years 10 months ago
2007
ACM
In this paper, we study the maintenance of role-based access control (RBAC) models in database environments using transitive closure relations. In particular, the algorithms that ...
154
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ECSQARU
2005
Springer
15 years 9 months ago
2005
Springer
In the presence of a river flood, operators in charge of control must take decisions based on imperfect and incomplete sources of information (e.g., data provided by a limited numb...
155
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SIGMETRICS
1997
ACM
15 years 8 months ago
1997
ACM
Rate based congestion control has been considered desirable, both to deal with the high bandwidth-delay products of today's high speed networks, and to match the needs of eme...
131
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SEMWEB
2010
Springer
15 years 2 months ago
2010
Springer
Abstract. Formal policies allow the non-ambiguous definition of situations in which usage of certain entities are allowed, and enable the automatic evaluation whether a situation i...
132
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AVI
2004
15 years 5 months ago
2004
Biodiversity databases have recently become widely available to the public and to other researchers. To retrieve information from these resources, users must understand the underl...