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By Leonardo Candela, Donatella Castelli, Pasquale Pagano, Manuele Simi (auth.), Julio Gonzalo, Costantino Thanos, M. Felisa Verdejo, Rafael C. Carrasco (eds.)
This publication constitutes the refereed lawsuits of the tenth eu convention on study and complex know-how for electronic Libraries, ECDL 2006, held in Alicante, Spain in September 2006.
The 36 revised complete papers provided including the prolonged abstracts of 18 demo papers and 15 revised poster papers have been rigorously reviewed and chosen from a complete of 159 submissions. The papers are equipped in topical sections on architectures, upkeep, retrieval, functions, technique, metadata, evaluate, person experiences, modeling, audiovisual content material, and language technologies.
Read or Download Research and Advanced Technology for Digital Libraries: 10th European Conference, ECDL 2006, Alicante, Spain, September 17-22, 2006. Proceedings PDF
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A key k ∈ K consists of a set of terms {t1 , t2 , . . , ts }, ti ∈ T , appearing within the same document d ∈ D. e. 1 ≤ s ≤ smax . The quality of a key k for a given document d with respect to indexing adequacy is determined by its discriminative power. To be discriminative, a key k must be as specific as possible with respect to d and the corresponding document collection D [12]. We categorize a key on the basis of its global document frequency (DF), and define a threshold DFmax to divide the set of keys K into two disjoint classes, a set of rare and frequent keys.
Doulkeridis, K. Nørv˚ag, and M. Vazirgiannis Level 4 initiators: A6 C1 A8 C3 A4 A7 A3 A0 A1 A9 Level 3 initiators: Level 2 initiators: C0 Level 1 initiators: A2 A5 Peers: C2 A B A0 ... An ... B 0 ... B n ... ... Zone Level 2 zone Level 3 zone Fig. 2. Left: Possible result of intra-zone clustering of zone A, resulting in the four clusters C0 , C1 , C2 , and C3 . Right: Hierarchy of zones and initiators 4. The initiator selects a representative peer Ri for each cluster, based on resource information that is provided during Phase 3, like peer bandwidth, connectivity, etc.
J. Gonzalo et al. ): ECDL 2006, LNCS 4172, pp. 14–25, 2006. c Springer-Verlag Berlin Heidelberg 2006 A P2P Architecture for Information Retrieval Across DL Collections 15 that P2P networks cannot be centrally controlled: Peers are located in various domains requiring minimal in place infrastructure and maintenance. Full-text P2P search is currently an active research area as existing P2P solutions still do not meet the requirements of relevance-based retrieval. It is a challenging problem since search engines traditionally rely on central coordination, while P2P is inherently decentralized.