Now showing 1 - 10 of 62
  • Publication
    Modelle für semantische Web-Anwendungen
    ( 2005)
    Neuhold, E.J.
    ;
    Fuchs, M.
    ;
    Niederée, C.
  • 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
    Matchmaking for business processes based on choreographies
    ( 2004)
    Wombacher, A.
    ;
    Frankhauser, P.
    ;
    Mahleko, B.
    ;
    Neuhold, E.J.
  • Publication
    Emergent semantics - Extended and revised version of the DASFAA 2004 paper
    ( 2004)
    Aberer, K.
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    Catarci, T.
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    Cudre-Mauroux, P.
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    Dillon, T.
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    Grimm, S.
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    Hacid, M.-S.
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    Illarramendi, A.
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    Jarrar, M.
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    Kashyap, V.
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    Mecella, M.
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    Mena, E.
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    Neuhold, E.J.
    ;
    Ouksel, A.M.
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    Risse, T.
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    Scannapieco, M.
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    Saltor, F.
    ;
    Santis, L. de
    ;
    Spaccapietra, S.
    ;
    Staab, S.
    ;
    Studer, R.
    ;
    Troyer, O. de
  • Publication
    Emergent semantics
    ( 2004)
    Aberer, K.
    ;
    Cudre-Mauroux, P.
    ;
    Ouksel, A.M.
    ;
    Catarci, T.
    ;
    Hacid, M.-S.
    ;
    Illarramendi, A.
    ;
    Kashyap, V.
    ;
    Mecella, M.
    ;
    Mena, E.
    ;
    Neuhold, E.J.
    ;
    Troyer, O. de
    ;
    Risse, T.
    ;
    Scannapieco, M.
    ;
    Saltor, F.
    ;
    Santis, L. de
    ;
    Spaccapietra, S.
    ;
    Staab, S.
    ;
    Studer, R.
  • Publication
    An architecture for recommendation based service mediation
    ( 2004)
    Mehta, B.
    ;
    Niederee, C.
    ;
    Stewart, A.
    ;
    Muscogiuri, C.
    ;
    Neuhold, E.J.
    Resource brokering is a crucial activity in Grid infrastructures and other environments with dynamic resource selection. The Mediation between resource requirements and available resources relies on adequate resource description, which becomes a special challenge when the resources are (Grid) services. In addition to the description of service semantics, service quality is another useful selection criteria in effective service mediation. Inspired by the success of community- and usage-pattern-based filtering and recommendation systems for targeted information access, this paper discusses automatic and manual service rating as an option for judging service quality. Such ratings can contribute to targeted service selection and complement the mediation based on service semantics.
  • Publication
    The role of context for information mediation in digital libraries
    ( 2004)
    Neuhold, E.J.
    ;
    Niederée, C.
    ;
    Stewart, A.
    ;
    Frommholz, I.
    ;
    Mehta, B.
    Mediating between available information objects and individual information needs is a central issue within the functionality of a digital library. In the simplest case this is an information request answered by a search engine based on an analysis of information objects within the digital library's information collection. However, neither the information access activity nor the information objects within the collection are isolated entities. They are both equipped with a multifaceted context. The invited talk, which is summarized by this paper, analyzes this context and discusses complementing approaches to make such context explicit and to use it for refining the mediation process within digital libraries.
  • Publication
    Contextual partitioning for comprehension of OODB schemas
    ( 2004)
    Gu, H.
    ;
    Perl, Y.
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    Halper, M.
    ;
    Geller, J.
    ;
    Neuhold, E.J.
    Object-oriented databases (OODBs) have been utilized for complex modeling tasks within a variety of application domains. The OODB schema, typically expressed in a graphical notation, can serve as a useful presentation tool for the information contained in the underlying OODB. However, such a schema can be a large, complex network of classes and relationships. This may greatly hinder its effectiveness in helping users gain an understanding of the OODB's contents and data organization. To facilitate this orientation process, a theoretical framework is presented that guides the refinement of an existing schema's subclass-of relationship hierarchy - the backbone of any OODB. The framework sets forth three rules which, when satisfied, lead to the establishment of a collection of contexts, each of which exhibits an internal subclass-of tree structure. A formal proof of this result is presented. An algorithmic methodology, involving a human-computer interaction, describes how the approach can be applied to a given OODB schema. An application of the methodology to an example OODB schema is included.
  • Publication
    Matchmaking for business processes based on choreographics
    ( 2004)
    Wombacher, A.
    ;
    Frankhauser, P.
    ;
    Mahleko, B.
    ;
    Neuhold, E.J.