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» A study of query length
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JC
2007
94views more  JC 2007»
15 years 3 months ago
On the complexity of the multivariate Sturm-Liouville eigenvalue problem
We study the complexity of approximating the smallest eigenvalue of −∆ + q with Dirichlet boundary conditions on the d-dimensional unit cube. Here ∆ is the Laplacian, and th...
A. Papageorgiou
119
Voted
P2P
2010
IEEE
189views Communications» more  P2P 2010»
15 years 1 months ago
Analyzing the DC File Sharing Network
—This paper investigates the Direct Connect (DC) file sharing network, which to the best of our knowledge, has never been academically studied before. We developed a participati...
Pavel Gurvich, Noam Koenigstein, Yuval Shavitt
147
Voted
ICDE
2012
IEEE
196views Database» more  ICDE 2012»
13 years 6 months ago
Scalable Multi-query Optimization for SPARQL
Abstract—This paper revisits the classical problem of multiquery optimization in the context of RDF/SPARQL. We show that the techniques developed for relational and semi-structur...
Wangchao Le, Anastasios Kementsietsidis, Songyun D...
ICDE
2009
IEEE
177views Database» more  ICDE 2009»
16 years 5 months ago
Light-Weight, Runtime Verification of Query Sources
Modern database systems increasingly make use of networked storage. This storage can be in the form of SAN's or in the form of shared-nothing nodes in a cluster. One type of a...
Tingjian Ge, Stanley B. Zdonik
SIGMOD
2009
ACM
125views Database» more  SIGMOD 2009»
16 years 3 months ago
Top-k queries on uncertain data: on score distribution and typical answers
Uncertain data arises in a number of domains, including data integration and sensor networks. Top-k queries that rank results according to some user-defined score are an important...
Tingjian Ge, Stanley B. Zdonik, Samuel Madden