P2P (peer-to-peer) teaching material sharing
environments can avoid redundant efforts, and alleviate
limitations resulting from centralized management and clientserver
modeling. However, the issues of availability and
trustworthiness have to be considered in teaching material
retrieval process, in order to improve the retrieval
performance. Current peer-to-peer file sharing applications
focus on exact matching and ignore the dynamic nature
inherent in peer-to-peer networks, which might degrade the
retrieval performance in terms of recall and response time.
Our idea is to appropriately set the due time to improve
response time of peer-to-peer teaching material retrieval
without sacrificing much recall. The proposed approach
consists of two phases: construction phase and sharing phase.
In construction phase, peer information is acquired and
managed in a decentralized manner. In sharing phase, the due
time is interactively determined and the results are retrieved.
A prototype system has been developed and experiments have
been conducted to evaluate the performance of the approach.
The experimental results show that the interactive algorithm
performs well in peer-to-peer grids with low trust and
availability.
Relation:
International Conference on Education Technology and Computer, ICETC 2009
