14348 search results - page 228 / 2870 » Active Database Systems |
245
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VLDB
2008
ACM
16 years 4 months ago
2008
ACM
Abstract In this article, we present a comprehensive approach for privacy preserving access control based on the notion of purpose. In our model, purpose information associated wit...
107
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PDIS
1994
IEEE
15 years 8 months ago
1994
IEEE
Existing federated database systems (FDBS) provide uniform access to multiple heterogeneous DBS, but do not enable objects to move across the DBS while retaining global identity. ...
139
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DKE
1998
15 years 4 months ago
1998
The issues of schema evolution and temporal object models are generally considered to be orthogonal and are handled independently. However, to properly model applications that nee...
167
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FODO
1998
Springer
15 years 8 months ago
1998
Springer
In object-oriented database systems (OODB) with logical OIDs, an OID index (OIDX) is needed to map from OID to the physical location of the object. In a transaction time temporal ...
161
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IS
2002
15 years 4 months ago
2002
Previous research in real-time concurrency control mainly focuses on the schedulability guarantee of hard real-time transactions and the reducing of the miss rate of soft real-tim...