Cooperative peer-to-peer applications are designed to share the resources of each computer in an overlay network for the common good of everyone. However, users do not necessarily have an incentive to donate resources to the system if they can get the system’s resources for free. This paper presents architectures for fair sharing of storage resources that are robust against collusions among nod...

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background: the purpose of this study was to evaluate the effectiveness of peer education among university students for reproductive health promotion based on researchers' experiences. methods: this interventional study was conducted in qazvin university of medical science during 2002 to 2004 through stakeholders' partnership and selection of 24 volunteer students according to their knowledge, ...

Pure peer-to-peer (P2P) networks is widely used, however they broadcast query packets, and cause excessive network traffic in particular. Addressing this issue, we propose a new strategy for content replication which prioritizes popular and attracting contents. Our strategy is based on replication adjustment, being cooperated with index caching, as well as LRU-based content replacement, and a m...

We consider the problem of supporting bandwidth heterogeneity and congestion control in the context of P2P multicast streaming. We identify several challenges peculiar to the P2P setting including robustness concerns arising from peer unreliability and the ambiguity of packet loss as an indicator of congestion. We propose a hybrid parentand child-driven bandwidth adaptation protocol that is des...

This paper addresses—to our knowledge, for the first time—the problem of querying a geosensor network—a sensor network of mobile, locationaware nodes—for historical data. It compares different network architectures and querying strategies with respect to their performance in reconstructing events or processes that happened in the past, trying to support the hypothesis that reconstruction is pos...

Traditional search system approaches have either been centralized or use flooding to ensure accuracy of the results returned which have bad performance. This paper presents SPSS (Semantic Peer-to-Peer Search System) that search documents through the P2P network hierarchically based on document semantic vector generated by Latent Semantic Indexing (LSI) [1]. The search cost for a given query is ...

In this paper we examine the database management of spatiotemporal resource information in mobile peer-to-peer networks, where moving objects communicate with each other via short-range wireless transmission. Several inherent characteristics of this environment, including the dynamic and unpredictable network topology, the limited peer-to-peer communication throughput, and the need for incentiv...

In recent years, online social networks have become very popular. Online social networks (OSN) have been useful to find former classmates or to improve our interaction with friends. Thus, a huge amount of information is generated and consumed by millions of people in these types of networks. Currently, most popular online social networks are based on centralized servers, whom are responsible ma...