The popularity of video-on-demand (VoD) streaming has grown dramatically over the World Wide Web. Most users in VoD P2P networks have to wait a long time in order to access their requesting videos. Therefore, reducing waiting time to access videos is the main challenge for VoD P2P networks. In this paper, we propose a novel algorithm for caching video based on peers' priority and video's popula...

Unstructured peer-to-peer (P2P) systems (e.g. Gnutella) are characterized by uneven distributions of node connectivity and file sharing. The existence of “hub” nodes that have a large number of connections and “generous” nodes that share many files significantly influences performance of information search over P2P file-sharing networks. In this paper, we present a novel Scalable Peerto-Peer Se...

  Background: Reproductive health problems affect youths in all countries. There is an urgent need to enhance youths reproductive health services to provide a healthy life for this group. In this regard, the present study aimed to evaluate the Reproductive Health Peer Education Program based on the opinion of university students.   Methods :This interventional study was conducted in Qazvin Univ...

Several recently emerged Internet services make use of application-level or overlay networks. Examples of such services include overlay multicast, structured peer-topeer lookup services, and peer-to-peer file sharing. Many of these services could benefit from enabling participating end hosts to estimate their relative network locations within the overlay. In this thesis, we present PCoord, a pe...

background and purpose: heart failure (hf) is a chronic, debilitating disease, and physical limitations and progressive symptoms of which associated with this condition can reduce quality of life (qol). patient education regarding heart hf is one of the main components of self-care. in this respect, peer education is significant in improving health and creating a learning environment. this stud...

Network coding is a good improvement of network routing to improve network throughput and provide high reliability. It allows a node to generate output messages by encoding its received messages. Peer-to-peer networks are a perfect place to apply network coding due to two reasons: 1. in peer-to-peer network, the topology is not fixed. So, it is very much easier to create the topology which suit...

Abstract— Peer-to-Peer ( P2P ) systems have been the center of attention in recent years due to their advantage . Since each node in such networks can act both as a service provider and as a client , they are subject to different attacks . Therefore it is vital to manage confidence for these vulnerable environments in order to eliminate unsafe peers . This paper investigates the use of genetic ...

Topology maintenance, or how to handle the possibly concurrent joining and leaving of nodes, is acentral problem for structured peer-to-peer networks. A good topology maintenance protocol should runefficiently, fully maintain the topology, and should not unduly restrict concurrency. In this paper, wepresent such a protocol for a multi-ring topology called Ranch. The protocol is effi...