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ICDE
2008
IEEE
169views Database» more  ICDE 2008»
14 years 6 months ago
Common Influence Join: A Natural Join Operation for Spatial Pointsets
We identify and formalize a novel join operator for two spatial pointsets P and Q. The common influence join (CIJ) returns the pairs of points (p, q), p P, q Q, such that there e...
Man Lung Yiu, Nikos Mamoulis, Panagiotis Karras
SIGMOD
2002
ACM
114views Database» more  SIGMOD 2002»
14 years 5 months ago
Time-parameterized queries in spatio-temporal databases
Time-parameterized queries (TP queries for short) retrieve (i) the actual result at the time that the query is issued, (ii) the validity period of the result given the current mot...
Yufei Tao, Dimitris Papadias
CCS
2009
ACM
14 years 5 months ago
A conceptual framework for Group-Centric secure information sharing
In this paper, we propose a conceptual framework for developing a family of models for Group-Centric information sharing. The traditional approach to information sharing, characte...
Ram Krishnan, Ravi S. Sandhu, Jianwei Niu, William...