Enterprise Information Systems: 8th International by José Cordeiro, Yannis Manolopoulos, Joaquim Filipe, Panos

By José Cordeiro, Yannis Manolopoulos, Joaquim Filipe, Panos Constantopoulos

This ebook comprises the conscientiously chosen top papers of the eighth overseas convention on company details Sysetms, ICEIS 2006, held in Paphos, Cyprus, in may possibly 2006.

The four invited papers and 27 revised and chosen papers provided during this quantity conceal diverse elements with regards to firm computing. They have been chosen from sixty three authorized papers (out of greater than four hundred submissions). The contributions are grouped in sections on databases and data platforms integration; synthetic intelligence and determination aid structures; details structures research and specification; software program brokers and web computing; and human-computer interplay.

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Additional resources for Enterprise Information Systems: 8th International Conference, ICEIS 2006, Paphos, Cyprus, May 23-27, 2006, Revised Selected Papers (Lecture Notes in Business Information Processing)

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Eventually, peers with similar local schemas become acquainted and clusters are created around active peers. GrouPeer intends to make the following contributions: • Adaptation of classical query rewriting to the needs of P2P databases and successful combination of it with automatic schema matching. • Investigation of the notion of query similarity in the context of the P2P paradigm and proposition of directions for its quantification • Provision of a complete methodology for discovering similar peers in an unstructured overlay and gradual clustering of them by utilizing learning through regularly posed query traffic.

Accordingly, GrouPeer achieves: • the gradual training in automatic schema matching for queries initiated by specific peers • the discovery of nodes concealed in the network that are convenient for acquaintees using as a mean only the queries posed in the P2P system. 36 V. Kantere and T. Sellis Therefore, this methodology can be used in order to progressively cluster the overlay so that peers with common interests are close or acquainted. Each peer can periodically evaluate peers that have answered queries on its behalf.

Springer-Verlag Berlin Heidelberg 2008 30 V. Kantere and T. Sellis The straightforward procedure for query processing in an unstructured P2P data management system consists of the propagation of the query on paths of bounded depth in the overlay. At each routing step, the query is rewritten to the schema of its new host based on the respective acquaintance mappings. A query may have to be rewritten several times from peer to peer till it reaches nodes that are able to answer it sufficiently in terms of quality but also quantity.

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