7751 search results - page 1521 / 1551 » Data streams: algorithms and applications |
WWW
2007
ACM
14 years 9 months ago
2007
ACM
Current web search engines focus on searching only the most recent snapshot of the web. In some cases, however, it would be desirable to search over collections that include many ...
WWW
2007
ACM
14 years 9 months ago
2007
ACM
We address the problem of identifying the domain of online databases. More precisely, given a set F of Web forms automatically gathered by a focused crawler and an online database...
WWW
2004
ACM
14 years 9 months ago
2004
ACM
Centralized Resource Description Framework (RDF) repositories have limitations both in their failure tolerance and in their scalability. Existing Peer-to-Peer (P2P) RDF repositori...
WWW
2002
ACM
14 years 9 months ago
2002
ACM
It is widely recognized that distributed denial-of-service (DDoS) attacks can disrupt electronic commerce and cause large revenue losses. However, effective defenses continue to b...
WWW
2002
ACM
14 years 9 months ago
2002
ACM
Query expansion has long been suggested as an effective way to resolve the short query and word mismatching problems. A number of query expansion methods have been proposed in tra...