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SIGMOD
2009
ACM
171views Database» more  SIGMOD 2009»
14 years 7 months ago
Secure outsourced aggregation via one-way chains
We consider the Outsourced Aggregation model, where sensing services outsource their sensor data collection and aggregation tasks to third-party service providers called aggregato...
Suman Nath, Haifeng Yu, Haowen Chan
ER
2010
Springer
129views Database» more  ER 2010»
13 years 6 months ago
Specifying Aggregation Functions in Multidimensional Models with OCL
Multidimensional models are at the core of data warehouse systems, since they allow decision makers to early define the relevant information and queries that are required to satis...
Jordi Cabot, Jose-Norberto Mazón, Jes&uacut...
PRDC
2009
IEEE
14 years 2 months ago
An Early-Stopping Protocol for Computing Aggregate Functions in Sensor Networks
Abstract—In this paper, we study algebraic aggregate computations in Sensor Networks. The main contribution is the presentation of an early-stopping protocol that computes the av...
Antonio Fernández Anta, Miguel A. Mosteiro,...
ECAI
2010
Springer
13 years 8 months ago
Learning Aggregation Functions for Expert Search
Abstract. Machine learning techniques are increasingly being applied to problems in the domain of information retrieval and text mining. In this paper we present an application of ...
Ronan Cummins, Mounia Lalmas, Colm O'Riordan
DBPL
1997
Springer
87views Database» more  DBPL 1997»
13 years 11 months ago
Incremental Recomputation of Recursive Queries with Nested Sets and Aggregate Functions
We examine the power of incremental evaluation systems that use an SQL-like language for maintaining recursively-de ned views. We show that recursive queries such as transitive clo...
Leonid Libkin, Limsoon Wong