Collaborative applications like video/audio conferencing, IP telephony, file sharing, collaborative work spaces, and multi-user games, having varied security requirements, require a secure and reliable group communication system to provide co-ordination among the processes. Peer to peer computing allows users to interact with each other and find and share resources without requiring a centraliz...

A computer game is usually considered as a finite state machine. For a distributed multiplayer game, state information has to be exchanged among its players when they move and interact in a virtual space. If the number of players is very large, only a small subset of the game entities, controlled by their players, is interested and forms a multicast group so as to reduce the information dissemi...

Sybil attack is an important problem as the peer-to-peer networks grow in size and become prominent means for distributing multimedia. In order to validate the feasibility of using psychometric tests as an approach to detect Sybils in their entirety as Sybil groups, experiment is conducted by taking the tests on a population of considerable size. Selected people were given multiple questionnair...

This paper presents small world architecture for P2P networks (SWAN) for content discovery in multi-group P2P systems. A semi-structured P2P algorithm of SWAN is utilized to create and find long-range shortcuts toward remote peer groups. In SWAN, not every peer node needs to be connected to remote groups, but every peer node can easily find which peer nodes have external connections to a specif...

Understanding peer effects is critical to evaluating the effect of public school segregation on the achievement gap. This paper develops a new approach to identifying the effect of peer behavior on achievement, using a framework that integrates previously unexplored types of heterogeneity in peer spillovers. Applying the strategy to North Carolina public elementary school students, I find peer ...

This study aimed at investigating the comparative effect of using self-assessment vs. peer-assessment on young EFL learners’ performance on selective and productive reading tasks. To do so, 56 young learners from among 70 students in four intact classes were selected based on their performance on the A1 Movers Test. Then, the participants were randomly divided into two groups, self-assessment a...

The present study aimed at investigating the effect of peer and teacher scaffolding through a process approach in a technology-enhanced environment on vocabulary learning among high and low self-regulated learners. Participants of the study were 120 English as a Foreign Language (EFL) learners who were selected based on their scores on a sample copy of the Oxford Placement Test (OPT). T...