2911 search results - page 515 / 583 » A Theory of Expressiveness in Mechanisms |
172
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PODS
2009
ACM
15 years 10 months ago
2009
ACM
Relational schema mappings have been extensively studied in connection with data integration and exchange problems, but mappings between XML schemas have not received the same amo...
157
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PODS
2009
ACM
15 years 10 months ago
2009
ACM
The paper investigates the question of whether a partially closed database has complete information to answer a query. In practice an enterprise often maintains master data Dm, a ...
KDD
2008
ACM
15 years 10 months ago
2008
ACM
Researchers in the social and behavioral sciences routinely rely on quasi-experimental designs to discover knowledge from large databases. Quasi-experimental designs (QEDs) exploi...
KDD
2007
ACM
15 years 10 months ago
2007
ACM
Summarization is an important task in data mining. A major challenge over the past years has been the efficient construction of fixed-space synopses that provide a deterministic q...
KDD
2002
ACM
15 years 10 months ago
2002
ACM
Abstract. Since more and more Web sites, especially sites of retailers, offer automatic recommendation services using Web usage mining, evaluation of recommender algorithms has bec...