• Comparison of Two Approaches to Building a Vertical Search Tool: A Case Study in the Nanotechnology Domain

      Chau, Michael; Chen, Hsinchun; Qin, Jailun; Zhou, Yilu; Qin, Yi; Sung, Wai-Ki; McDonald, Daniel M. (ACM/IEEE-CS, 2002)
      As the Web has been growing exponentially, it has become increasingly difficult to search for desired information. In recent years, many domain-specific (vertical) search tools have been developed to serve the information needs of specific fields. This paper describes two approaches to building a domain-specific search tool. We report our experience in building two different tools in the nanotechnology domain - (1) a server-side search engine, and (2) a client-side search agent. The designs of the two search systems are presented and discussed, and their strengths and weaknesses are compared. Some future research directions are also discussed.
    • A Graph-based Recommender System for Digital Library

      Huang, Zan; Chung, Wingyan; Ong, Thian-Huat; Chen, Hsinchun (ACM/IEEE-CS, 2002)
      Research shows that recommendations comprise a valuable service for users of a digital library [11]. While most existing recommender systems rely either on a content-based approach or a collaborative approach to make recommendations, there is potential to improve recommendation quality by using a combination of both approaches (a hybrid approach). In this paper, we report how we tested the idea of using a graph-based recommender system that naturally combines the content-based and collaborative approaches. Due to the similarity between our problem and a concept retrieval task, a Hopfield net algorithm was used to exploit high-degree book-book, useruser and book-user associations. Sample hold-out testing and preliminary subject testing were conducted to evaluate the system, by which it was found that the system gained improvement with respect to both precision and recall by combining content-based and collaborative approaches. However, no significant improvement was observed by exploiting high-degree associations.
    • NanoPort: A Web Portal for Nanoscale Science and Technology

      Chau, Michael; Chen, Hsinchun; Qin, Jailun; Zhou, Yilu; Sung, Wai-Ki; Chen, Mark; Qin, Yi; McDonald, Daniel M.; Lally, Ann M. (ACM/IEEE-CS, 2002)
      Areas related to nanotechnology, or nanoscale science and engineering (NSSE), have experienced tremendous growth over the past few years. While there are a large variety of useful resources available on the Web, such information are usually distributed and difficult to locate, resulting in the problem of information overload. To address the problem, we developed the NanoPort system, an integrated Web portal aiming to provide a one-stop shopping service to satisfy the information needs of researchers and practitioners in the field of NSSE [1]. We believe that the approaches taken also can be applied to other domains.