686 search results - page 12 / 138 » Query Answering in Peer-to-Peer Data Exchange Systems |
158
click to vote
VLDB
2007
ACM
15 years 9 months ago
2007
ACM
As more sensitive data is captured in electronic form, security becomes more and more important. Data encryption is the main technique for achieving security. While in the past en...
PVLDB
2010
14 years 7 months ago
2010
This paper addresses the problem of explaining missing answers in queries that include selection, projection, join, union, aggregation and grouping (SPJUA). Explaining missing ans...
AMW
2009
14 years 10 months ago
2009
Abstract. A Data Warehouse (DW) is a data repository that organizes and physically integrates data from multiple sources under special kinds of schemas. A DW is composed by a set o...
ICDT
2001
ACM
15 years 1 months ago
2001
ACM
In information-integration systems, source relations often have limitations on access patterns to their data; i.e., when one must provide values for certain attributes of a relatio...
CIKM
2011
Springer
13 years 9 months ago
2011
Springer
Community QA portals provide an important resource for non-factoid question-answering. The inherent noisiness of user-generated data makes the identification of high-quality cont...