A user reputation model for DLDE learning 2.0 community

With the development of digital library, social networks, and user-generated content, need for trust and reputation models become prime. In this paper, we propose a user reputation model. As an encouraging and sanctioning mechanism, it has been applied to the DLDE (Digital Library and Digital Education) Learning 2.0 Community that is developed by our lab based on digital repositories management etc. The model combines user's individual activity analysis approach and collaborative activity analysis approach. Individual activity analysis approach is used to analyze the activities in which users participate individually and give its evaluation method. Collaborative activity analysis approach is used to analyze users' collaborative activities; three different categories of users' collaborative activities and corresponding evaluation methods were proposed in this paper. Experiments show that the proposed reputation model can accomplish the mission of encouraging good behaviors and differentiating the ability of students. Therefore it can fit well in our Community.