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VLDB
2001
ACM
114views Database» more  VLDB 2001»
15 years 9 months ago
Distinct Sampling for Highly-Accurate Answers to Distinct Values Queries and Event Reports
Estimating the number of distinct values is a wellstudied problem, due to its frequent occurrence in queries and its importance in selecting good query plans. Previous work has sh...
Phillip B. Gibbons
ECTEL
2006
Springer
15 years 8 months ago
Teachers Perception of Computer Supported Problem Solving: An Italian Research
Requirements for educational software could be based on an analysis of existing learning situations. In order to obtain useful information about teaching practices, an explorative ...
Luca Tateo, Giuseppina Marsico, Maria Annarumma, G...
CIKM
2009
Springer
15 years 11 months ago
Helping editors choose better seed sets for entity set expansion
Sets of named entities are used heavily at commercial search engines such as Google, Yahoo and Bing. Acquiring sets of entities typically consists of combining semi-supervised exp...
Vishnu Vyas, Patrick Pantel, Eric Crestan
EDBT
2002
ACM
125views Database» more  EDBT 2002»
16 years 4 months ago
Estimating Answer Sizes for XML Queries
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
Yuqing Wu, Jignesh M. Patel, H. V. Jagadish
CIKM
2008
Springer
15 years 6 months ago
Answering general time sensitive queries
Time is an important dimension of relevance for a large number of searches, such as over blogs and news archives. So far, research on searching over such collections has largely f...
Wisam Dakka, Luis Gravano, Panagiotis G. Ipeirotis