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» On Bounded Queries and Approximation
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ICALP
2011
Springer
14 years 10 months ago
Improved Approximation for the Directed Spanner Problem
We present an O( √ n log n)-approximation algorithm for the problem of finding the sparsest spanner of a given directed graph G on n vertices. A spanner of a graph is a sparse ...
Piotr Berman, Arnab Bhattacharyya, Konstantin Maka...
ICDE
2006
IEEE
198views Database» more  ICDE 2006»
16 years 8 months ago
Automating the Design and Construction of Query Forms
One of the simplest ways to query a database is through a form, where a user can fill in relevant information and obtain desired results by submitting the form. Designing good sta...
Magesh Jayapandian, H. V. Jagadish
SIGMOD
2007
ACM
124views Database» more  SIGMOD 2007»
16 years 6 months ago
Query suspend and resume
Suppose a long-running analytical query is executing on a database server and has been allocated a large amount of physical memory. A high-priority task comes in and we need to ru...
Badrish Chandramouli, Christopher N. Bond, Shivnat...
SAC
2009
ACM
16 years 1 months ago
GPU-based computation of distance functions on road networks with applications
We present a GPU-based algorithm for computing discretized distance functions on road networks. As applications, we provide algorithms for computing discrete Order-k Network Voron...
Marta Fort, Joan Antoni Sellarès
SPIRE
2004
Springer
16 years 2 days ago
Metric Indexing for the Vector Model in Text Retrieval
In the area of Text Retrieval, processing a query in the vector model has been verified to be qualitatively more effective than searching in the boolean model. However, in case o...
Tomás Skopal, Pavel Moravec, Jaroslav Pokor...