We consider network clustering as the way to improve the performance of locating data in unstructured P2P systems. Connectivity-based Distributed node Clustering (CDC), and SCM-based Distributed Clustering (SDC) are two major protocols that allow partitioning a network topology into clusters, based on node connectivity. These protocols focus on the accuracy of the clustering scheme, i.e. using ...

Peer-to-peer (P2P) computing is currently attracting enormous attention. In P2P systems a very large number of autonomous computing nodes (the peers) pool together their resources and rely on each other for data and services. More and more P2P data management systems employ nowadays intensional (i.e., schema) information for integrating and querying peer bases in, so-called, Semantic Overlay Ne...

A Mobile Peer-to-Peer (P2P) system is a dynamic network of mobile wireless devices, set up with no existing infrastructure or centralized control. The Mobile P2P systems are usually characterized by a high decentralization, highly dynamic, and self-organizing. This paper gives an overview on the Mobile P2P systems, including the concepts and characteristics, as well as the components and algori...

In this paper, we present the design and evaluation of PeerDB, a peer-to-peer (P2P) distributed data sharing system. PeerDB distinguishes itself from existing P2P systems in several ways. First, it is a full-fledge data management system that supports fine-grain content-based searching. Second, it facilitates sharing of data without shared schema. Third, it combines the power of mobile agents i...

Similarity searching is particularly important in fully distributed networks such as P2P systems in which various routing schemes are used to submit queries to a group of relevant nodes. This paper focuses on the maintenance cost models and performances of similarity search in the HON P2P system, where data and peers are organized in a high dimensional feature space. We show through extensive s...

Peer-to-peer (P2P) computing is currently attracting enormous media attention, spurred by the popularity of file sharing systems such as Gnutella, eDonkey and BitTorrent. The peers are simply autonomous, or as some call them, first-class citizens. P2P networks provide a new distributed computing paradigm on the Internet for information sharing. The decentralized nature foster knowledge sharing ...

Peer-to-Peer (P2P) technology is being recognized as a new approach to decentralized workflow management systems to overcome the limitation of the current centralized ClienUServer workflow management systems. However, the lack of supporting adaptability and exception handling at instance level of this approach seems to be responsible for the weakness of the P2P workflow management systems. Dyna...

Efficient Resource discovery mechanism is one of the fundamental requirement for Grid computing systems, as it aids in resource management and scheduling of applications. Resource discovery activity involve searching for the appropriate resource types that match the user’s application requirements. Various kinds of solutions to grid resource discovery have been suggested, including the centrali...

The success of innovative e-participation solutions depends heavily on the organizational planning and the incorporation of such initiatives into the different stages of the policy life-cycle. E-participation often demands to introduce new participation facilities into the traditional processes of policy formulation and decision making. Accommodating the various requirements from distinct persp...

We are interested in peer-to-peer (P2P) computing, where a P2P application consists of a (wireless) network of nodes (peers), and assumes full peer autonomy, no global control, and intermittent connectivity. P2P computing has many advantages over classical client-server and web-based distributed architectures. However, the P2P computing model also has a number of limitations in the mechanisms i...