514 search results - page 3 / 103 » Foundations of Aggregation Constraints |
COMCOM
2006
13 years 8 months ago
2006
In this paper, we study the problem of constructing an energy efficient data aggregation tree for data gathering in wireless sensor networks. We consider a real-time scenario wher...
PODS
1998
ACM
14 years 12 days ago
1998
ACM
An extended abstract of this paper appeared in Proceedings of the 15th ACM SIGACT-SIGMODSIGART Symposium on Principles of Database Systems [1]. 2 E-mail: pankaÄcs.duke.edu; httpÂ...
VLDB
2000
ACM
13 years 11 months ago
2000
ACM
We present the TreeScape system that, unlike any other system known to the authors, enables the reuse of pre-computed aggregate query results for irregular dimension hierarchies, ...
PODS
1999
ACM
14 years 15 days ago
1999
ACM
We investigate the problem of how to extend constraint query languages with aggregate operators. We deal with standard relational aggregation, and also with aggregates speci c to ...
CN
2006
13 years 8 months ago
2006
The problem of optimal data gathering in wireless sensor networks (WSNs) is addressed by means of optimization techniques. The goal of this work is to lay the foundations to devel...