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It is an important knowledge management task to evaluate a user's domain knowledge in a knowledge community. We present a new domain knowledge representation method that considers both user-document associations and document-topic relevance. We provide three alternative user-document association models with varying syntactic and semantic inferences and two alternative document-topic relevance models...
As computer-mediated communication services in the Web 2.0 arena, online communities have become very important places for Web users to share knowledge and experiences. One important research issue in online communities is how to find expert users in the community. In this paper, we investigate the expertise that users displayed in online communities, especially in discussion groups and propose an...
Recently, many commercial products, such as Google Trends and Yahoo! Buzz, are released to monitor the past search engine query frequency trend. However, little research has been devoted for predicting the upcoming query trend, which is of great importance in providing guidelines for future business planning. In this paper, a unified solution is presented for such a purpose. Besides the classical...
Dimension reduction for large-scale text data is attracting much attention lately due to the rapid growth of World Wide Web. We can consider dimension reduction algorithms in two categories: feature extraction and feature selection. An important problem remains: it has been difficult to integrate these two algorithm categories into a single framework, making it difficult to reap the benefit of both...
Web-based knowledge communities (WKCs) allow individuals with similar interests to collectively engage in knowledge acquisition and exchange. In spite of increased research interest in the topic of online knowledge exchange and social interaction, few studies have identified factors that contribute to WKC success. In this study we apply Preece's community success framework of usability and sociability...
The National Science, Technology, Engineering, and Mathematics Education Digital Library, funded by the National Science Foundation, has the potential to have a significant impact on the future of education in this country and around the world. We are exploring how to best tailor NSDL functionality toward particular communities of users, including learners and educators. It is crucial that we not...
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