Fraunhofer Institut für Integrierte Publikations-und Informationssysteme IPSI

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  • Publication
    The layer-seeds term clustering method: Enabling proactive situation-aware product recommendations in e-commerce dialogues
    ( 2005)
    Chen, L.
    ;
    L'Abbate, M.
    ;
    Thiel, U.
    ;
    Neuhold, E.J.
    In e-commerce it is often crucial to provide customers a large choice of relevant offers. Users, however, seldom provides complete and comprehensive descriptions of their desires, therefore user interfaces are needed that can generate automatically expanded queries to the product database and proactively enrich the ongoing dialogue with recommendations of suitable products. Automatic query expansion is mostly based on thesaurus and/or user profiles. In e-commerce applications, specific thesauri reflecting the webstore's product categories are desirable. This work describes a method for the automatic construction of a thesaurus based on existing categories of documents. A clustering algorithm, the "Layer-Seeds method", is introduced, which facilitates the automatic generation of thesaurus reflecting the specific vocabulary occurring in a given collection of documents. The clustering works on terms extracted from the documents in a certain category and organizes them in a tree-like hierarchical structure-a thesaurus. The thesaurus is then employed for automatic query expansion in an e-commerce application in order to obtain better results for product searching. Experiments yield evidence that a significant increase of user satisfaction is achieved.
  • Publication
    COLLATE - A collaboratory supporting research on historic European films
    ( 2004)
    Thiel, U.
    ;
    Brocks, H.
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    Frommholz, I.
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    Dirsch-Weigand, A.
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    Keiper, J.
    ;
    Stein, A.
    ;
    Neuhold, E.J.
  • Publication
    Collaborative research and documentation of European film history
    ( 2004)
    Stein, A.
    ;
    Keiper, J.
    ;
    Bezerra, L.
    ;
    Brocks, H.
    ;
    Thiel, U.
  • Publication
    Designing for Semantic Access: A Video Browsing System
    ( 2000)
    Hollfelder, S.
    ;
    Everts, A.
    ;
    Thiel, U.
  • Publication
  • Publication
    An abductive linguistic approach to model retrieval
    ( 1997)
    Gulla, J.A.
    ;
    Vos, A. van der
    ;
    Thiel, U.
  • Publication
    Digital libraries and information retrieval
    ( 1996)
    Ferber, R.
    ;
    Thiel, U.
  • Publication
    Cases, scripts, and information-seeking strategies: On the design on interactive information retrieval systems
    ( 1995)
    Belkin, N.
    ;
    Cool, C.
    ;
    Stein, A.
    ;
    Thiel, U.
    The support of effective interaction of the user with the other components of the system is a central problem for information retrieval. In this paper, we present a theory of such interactions taking place within a space of information-seeking strategies, and discuss how such a concept can be used to design for effective interaction. In particular, we propose a model of information retrieval system design based on the ideas of: a multidimensional space of information-seeking strategies; dialogue structures for information seeking; cases of specific information-seeking dialogues; and, scripts as distinguished prototypical cases. We demonstrate the use of this model by discussing in some detail the MERIT system, a prototype information retrieval system, that incorporates these design principles.