Choosing Appropriate Peer-to-Peer Infrastructure for Your Digital Libraries

Ding, Hao; Sølvberg, Ingeborg

doi:10.1007/11599517_55

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…In contrast to our approach, the allocation of documents to clusters is done by classification, it is not unsupervised, and clusters are not hierarchical. We believe that current research in P2P digital libraries [1,6,11] can benefit from the merits of our approach.…”

Section: Related Workmentioning

confidence: 99%

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Scalable Semantic Overlay Generation for P2P-Based Digital Libraries

Doulkeridis

Nørvåg

Vazirgiannis

2006

Research and Advanced Technology for Digital Libraries

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Abstract. The advent of digital libraries along with the tremendous growth of digital content call for distributed and scalable approaches for managing vast data collections. Peer-to-peer (P2P) networks emerge as a promising solution to delve with these challenges. However, the lack of global content/topology knowledge in an unstructured P2P system demands unsupervised methods for content organization and necessitates efficient and high quality search mechanisms. Towards this end, Semantic Overlay Networks (SONs) have been proposed in the literature, and in this paper, an unsupervised method for decentralized and distributed generation of SONs, called DESENT, is proposed. We prove the feasibility of our approach through analytical cost models and we show through simulations that, when compared to flooding, our approach improves recall by more than 3-10 times, depending on the network topology.

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Section: Related Workmentioning

confidence: 99%

“…Key issues in this process are [9]: the system architecture and the information access means. With respect to system architecture, peer-to-peer (P2P) is identified as a topic of primary interest, as P2P architectures allow for loosely-coupled integration of information services and sharing of information/knowledge [1,6,11].…”

Section: Introductionmentioning

confidence: 99%

Scalable Semantic Overlay Generation for P2P-Based Digital Libraries

Doulkeridis

Nørvåg

Vazirgiannis

2006

Research and Advanced Technology for Digital Libraries

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“…• Web search [100,109,9,37] • Digital libraries [35,112,93,34,67] • Distributed image retrieval [140,43,74] • P2P databases [62,121]…”

Section: Applicationsmentioning

confidence: 99%

Organizing and searching data in unstructured P2P networks

Δουλκερίδης¹

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As data generation becomes increasingly inherently distributed, either due to usergenerated (multimedia) content or because of application-specific needs (sensor networks, data streams, etc.), traditional centralized architectures fail to address the new challenges of contemporary data management. A promising solution for the design and deployment of global-scale applications is the exploitation of the peer-to-peer (P2P) paradigm. P2P has emerged as a powerful model for organizing and searching large data repositories distributed over autonomous independent sources.The main topic and contribution of this thesis is the unsupervised organization of content into Semantic Overlay Networks (SONs), in a decentralized and distributed manner, and subsequently a variety of techniques for efficient searching and query processing in unstructured P2P systems. SONs have been proposed in the relevant research literature, as a way to organize peers into thematic groups, thereby enabling query routing to specific peer groups in a deliberate way, instead of blind forwarding.In particular, this work focuses on unstructured P2P networks that preserve peer autonomy. A novel protocol for unsupervised, distributed and decentralized SON construction is proposed, named DESENT [35,38], which employs distributed clustering of peer contents, respecting the requirements imposed by the distributed nature of the environment [138]. Exploiting the generated SONs, we propose efficient routing strategies for answering similarity search queries [37,39]. The approach is applied and tested in a distributed IR setting, aiming to address some of the limitations of P2P IR/web search. Towards this goal, a distributed dimensionality reduction algorithm is proposed [96], in order to reduce the high-dimensional feature space and improve clustering quality.Assuming a super-peer architecture we propose an approach called SIMPEER [43] that efficiently supports similarity search over data distributed over a large set of peers. We show how range queries and nearest neighbor queries can be processed. We also explore how to support non-traditional queries (such as top-k [141] and skylines [139]) that involve ranking. Furthermore, by relaxing the restriction of completely unsupervised environment and assuming a semi-supervised context, a novel technique for P2P summary caching of hierarchical information is presented, exploiting either predefined taxonomies [104] or XML schema information [36,40], which is applied in mobile P2P context-aware environments to improve query routing [45,44]. Preface This is a doctoral thesis submitted to the Athens University of Economics and Business for the doctoral degree. This work has been carried out at the DB-NET research team on Data and Web Mining, Department of Informatics, at the Athens University of Economics and Business, under the supervision of Prof. Michalis Vazirgiannis. This thesis is part of the 03E∆850/8.3.1. research project, implemented within the framework of the "Reinforcement Programme of Human Research Manpow...

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Choosing Appropriate Peer-to-Peer Infrastructure for Your Digital Libraries

Cited by 2 publications

References 13 publications

Scalable Semantic Overlay Generation for P2P-Based Digital Libraries

Scalable Semantic Overlay Generation for P2P-Based Digital Libraries

Organizing and searching data in unstructured P2P networks

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