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» The Query Answering System PRODICOS
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NAACL
2007
13 years 11 months ago
Question Answering Using Integrated Information Retrieval and Information Extraction
This paper addresses the task of providing extended responses to questions regarding specialized topics. This task is an amalgam of information retrieval, topical summarization, a...
Barry Schiffman, Kathleen McKeown, Ralph Grishman,...
AINA
2006
IEEE
14 years 4 months ago
Effect of Redundancy on Mean Time to Failure of Wireless Sensor Networks
In query-based wireless sensor networks (WSNs), the system must perform data sensing and retrieval and possibly aggregate data as a response at runtime. Since a WSN is often deplo...
Anh Phan Speer, Ing-Ray Chen
SIGMOD
2007
ACM
146views Database» more  SIGMOD 2007»
14 years 10 months ago
Distributed query evaluation with performance guarantees
Partial evaluation has recently proven an effective technique for evaluating Boolean XPath queries over a fragmented tree that is distributed over a number of sites. What left ope...
Gao Cong, Wenfei Fan, Anastasios Kementsietsidis
EDBT
2011
ACM
231views Database» more  EDBT 2011»
13 years 1 months ago
Data integration with dependent sources
Data integration systems offer users a uniform interface to a set of data sources. Previous work has typically assumed that the data sources are independent of each other; however...
Anish Das Sarma, Xin Luna Dong, Alon Y. Halevy
ICDE
2008
IEEE
166views Database» more  ICDE 2008»
14 years 11 months ago
A Clustered Index Approach to Distributed XPath Processing
Supporting top-k queries over distributed collections of schemaless XML data poses two challenges. While XML supports expressive query languages such as XPath and XQuery, these la...
Georgia Koloniari, Evaggelia Pitoura