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CCS
2007
ACM
15 years 6 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 ...
CIKM
2007
Springer
15 years 6 months ago
2007
Springer
We present a research effort into the application of semantic web methods and technologies to address the challenging problem of integrating heterogeneous volcanic and atmospheri...
CIKM
2007
Springer
15 years 6 months ago
2007
Springer
Pseudo-relevance feedback, or query expansion, has been shown to improve retrieval performance in the adhoc retrieval task. In such a scenario, a few top-ranked documents are assu...
CIVR
2007
Springer
15 years 6 months ago
2007
Springer
Among the vast numbers of images on the web are many duplicates and near-duplicates, that is, variants derived from the same original image. Such near-duplicates appear in many we...
HUC
2007
Springer
15 years 6 months ago
2007
Springer
Abstract. Battery lifetime has become one of the top usability concerns of mobile systems. While many endeavors have been devoted to improving battery lifetime, they have fallen sh...