522 search results - page 9 / 105 » Answering Aggregation Queries in a Secure System Model |
ICDE
2011
IEEE
12 years 11 months ago
2011
IEEE
— In this paper, we study the problem of efficiently computing multiple aggregation queries over a data stream. In order to share computation, prior proposals have suggested ins...
AAAI
2008
13 years 10 months ago
2008
Current search engines cannot effectively rank those relational data, which exists on dynamic websites supported by online databases. In this study, to rank such structured data, ...
ESORICS
2002
Springer
14 years 7 months ago
2002
Springer
Abstract. An important goal of security in information systems is confidentiality. A confidentiality policy specifies which users should be forbidden to acquire what kind of inform...
VLDB
1991
ACM
13 years 11 months ago
1991
ACM
Queries in object-oriented datab;Lqcs are formulated against a class and retrieve instnnccls of the class sat,isfying a certain predicate on the att,riblltes of the class. The pre...
WAIM
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. The heterogeneity nature of XML data creates the need for approximate query answering. In this paper, we present an XML system that cooperates with users to provide user-...