Christophe Cérin, Kuan-Ching Li's 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 complaints of the second one overseas convention on Grid and Pervasive Computing, GPC 2007, held in Paris, France in may well 2007.

The fifty six revised complete papers and 12 revised brief papers have been conscientiously chosen from 217 submissions in the course of rounds of reviewing and development. The papers tackle all elements of grid and pervasive computing and concentrate on themes similar 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 comparable 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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2 Query Evaluation This phase deals with matching a set of summaries organized in a hierarchy S, against the query Q. The query is transformed into a logical proposition P used to qualify the link between a summary node and the query. P is under a conjunctive form in which all descriptors appears as literals. In consequence, each set of descriptors yields on corresponding clause. For instance, the above query Q is transformed to P = (young OU adult) ET (malaria). A valuation function has been defined to valuate the proposition P in the context of a summary node z.

E. the set of peers Pz having data described by its intent (see Definition 2), we can define the set PQ of relevant peers for the query Q as follows: PQ = {∪z∈ZQ Pz }. The query Q is directly propagated to these relevant peers. Thus, a distinctive feature of our approach is that the number of hops the queries makes to find the matching nodes is “ideally” reduced to one, and consequently, excessive delays are avoided. However, the efficiency of this query routing depends on the completeness and the freshness of summaries, since stale answers may occur in query results.

Furthermore, through the data management client, users can also specify access permissions on data objects, as shown in Figure 4, for sharing and collaboration. Fig. 7. The major components of Taiwan UniGrid and their interactions 4 Operation Scenario of Taiwan UniGrid In this section, we will demonstrate an operation scenario of using Taiwan UniGrid. Figure 7 shows the major components of Taiwan UniGrid and their interactions. The high-level operation scenario is explained as follows. • A Grid user logins to UniGrid Portal by entering his/her account and password and UniGrid Portal employs Account Management service to verify user’s identity.

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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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