Read e-book online Advances in Grid and Pervasive Computing: Second PDF

By Christophe Cérin, Kuan-Ching Li

ISBN-10: 3540723595

ISBN-13: 9783540723592

ISBN-10: 3540723609

ISBN-13: 9783540723608

This ebook constitutes the refereed court cases of the second one foreign convention on Grid and Pervasive Computing, GPC 2007, held in Paris, France in might 2007.

The fifty six revised complete papers and 12 revised brief papers have been rigorously chosen from 217 submissions in the course of rounds of reviewing and development. The papers deal with all elements of grid and pervasive computing and concentrate on subject matters corresponding to cluster computing, excessive functionality computing, grid computing, semantic net and semantic grid, service-oriented computing, peer-to-peer computing, pervasive computing, cellular computing, community garage, in addition to grid and pervasive similar applications.

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Additional info for Advances in Grid and Pervasive Computing: Second International Conference, GPC 2007, Paris, France, May 2-4, 2007, Proceedings

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This allows an efficient peer localization since we exploit data descriptions rather than structural information on data schemas, in order to propagate the query. Besides, when an exact answer is not required, summaries can directly provide approximate answers without accessing original database records. Query processing proceeds in two phases: 1) query extension and 2) query evaluation. 1 Query Extension First, the query Q must be extended to a flexible query Q∗ in order to be handled by a summary querying process.

Thus, it gives more flexibility in tuning the trade-off recall ρ / precision π of the query answers. Let V be the set of peers visited while processing a query. e. Query Scope). The trade-off can be tuned by confronting the set PQ with the cooperation list CL. v = 0} the set of peers whose descriptions are considered fresh according to their current data instances. Thus, if a query Q is propagated only to the set V = PQ ∩ Pf resh , then precision is maximum since all visited peers are certainly matching peers (no false positives), but recall depends on the fraction of false negatives in query results that could be returned by the set of excluded peers PQ \Pf resh .

K. Aberer et al. P-grid: a self-organizing structured P2P system. , 32(3), 2003. 2. R. Akbarinia, V. Martins, E. Pacitti, and P. Valduriez. Replication and query processing in the APPA data management system. In Workshop on Distributed Data and Structures (WDAS’2004), 2004. 26 R. Hayek et al. 3. A. Chakravarti, G. Baumgartner, and M. Lauria. The organic grid: self-organizing computation on a peer-to-peer network. IEEE Transactions on Systems, Man, and Cybernetics, Part A, 35(3):373–384, 2005. 4.

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Advances in Grid and Pervasive Computing: Second International Conference, GPC 2007, Paris, France, May 2-4, 2007, Proceedings by Christophe Cérin, Kuan-Ching Li

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