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169
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CN
2004
15 years 6 months ago
2004
Users who join a peer-to-peer network have, in general, suboptimal incentives to contribute to the network, because of the externalities that exist between them. The result is an ...
201
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SIGIR
2010
ACM
15 years 4 months ago
2010
ACM
Keyword queries over structured databases are notoriously ambiguous. No single interpretation of a keyword query can satisfy all users, and multiple interpretations may yield over...
218
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CIKM
2008
Springer
15 years 8 months ago
2008
Springer
Tagged data is rapidly becoming more available on the World Wide Web. Web sites which populate tagging services offer a good way for Internet users to share their knowledge. An in...
175
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CCS
2007
ACM
16 years 23 days 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 ...
170
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ELPUB
2006
ACM
16 years 17 days ago
2006
ACM
By the end of this year visitors to the Flemish town of Mechelen can discover the city with the help of the new CityInMyPocket walking guide. Instead of following a person or a bo...