14306 search results - page 182 / 2862 » Database System Concepts |
160
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VLDB
1991
ACM
15 years 7 months ago
1991
ACM
Systems designed for efficient retrieval of conventional data can be very inefficient at retrieving documents. Documents have more complex structure than conventional data, and th...
231
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ICDE
1997
IEEE
16 years 5 months ago
1997
IEEE
The need to transform data between heterogeneous databases arises from a number of critical tasks in data management. These tasks are complicated by schema evolution in the underl...
134
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MM
2009
ACM
15 years 10 months ago
2009
ACM
Today, semantic concept based video retrieval systems often show insufficient performance for real-life applications. Clearly, a big share of the reason is the lacking performance...
144
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CIKM
2006
Springer
15 years 5 months ago
2006
Springer
Peer Data Management Systems (PDMS) are a natural extension of heterogeneous database systems. One of the main tasks in such systems is efficient query processing. Insisting on co...
131
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SACMAT
2010
ACM
15 years 2 months ago
2010
ACM
Role mining from the existing permissions has been widely applied to aid the process of migrating to an RBAC system. While all permissions are treated evenly in previous approache...