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  4. P2P Network and Incentive Design for Sharing Teaching Material
 
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P2P Network and Incentive Design for Sharing Teaching Material

Date Issued
2005
Date
2005
Author(s)
Lai, Jia-Jiang
DOI
en-US
URI
http://ntur.lib.ntu.edu.tw//handle/246246/58678
Abstract
Content digitalization and advancement of communication network lead to content sharing on the internet. Teaching material sharing (TMS) is one of the important applications of content delivery networks (CDNs). TMS enables teachers to leverage on each other’s specialty, to produce quality teaching materials and to nurture creative teaching. TMS may also help alleviate digital divide. How to makes teachers create and share TM conveniently and how to incite teachers sharing their TMs positively are important problem in TMS. This thesis focuses on TMS among elementary school teachers over TANet. Our research aims at two issues: (i) How to design a P2P-based CDN for TMS that matches the organizational structure of elementary school system, and (ii) How to design incentives that encourage teachers to use and sharing teaching materials (TM) over the P2P TMS network. Challenges include TM presentation, TM discovery and delivery, TM quality evaluation, credit accounting, teacher behavior modeling, modeling organizational objective, incentive in a non-profit environment. We design a P2P-based TMS environment over TANet by combining the following four items: (i) Sharable Content Object Reference Model (SCORM) for TM presentation, (ii) Hybrid P2P network for TM discovery and delivery, (iii) a review system of TM quality evaluation, (iv) A transaction and credit accounting system. The Hybrid P2P architecture matches the organizational structure of elementary school system. In designing the incentive, firstly we build system model by considering: (i) utility from reward minus cost of creating TM equals to teacher’s benefit function, (ii) using Bass model to capture the dynamics of teacher’s willingness to upload TM. Secondly two kinds of incentive are proposed: (i) Accounting of TM quantity and quality for reputation-based reward incentive, (ii) Credit-based constraint avoids free-riding by enforcing teacher to review. Two parts of incentives are supported by government’s resource. Under our model, the numerical analysis results show that the incentive can induce more upload and more material exchange. Effects of incentive includes: (i) credit enforce teacher give feedback to the TMS system, (ii) Reputation incite teacher to share TM, (iii) TM score quantizes the quality of TM, (iv) Accounting system makes contribution and exploitation visual. A Hybrid P2P-based TMS environment is implemented over .Net framework and IIS web service. The corresponding entities in organizational structure of elementary school system are realized. In additional, two parts of incentive mechanism proposed by us also be applied to our TMS system that make our TMS more complete.
Subjects
點對點
網路
誘因
教材
分享
Peer-to-Peer
network
incentive
teaching material
sharing
Type
thesis

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