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  • 1.
    Ahlgren, Per
    et al.
    Stockholm University.
    Grönqvist, Leif
    Evaluation of retrieval effectiveness with incomplete relevance data: theoretical and experimental comparison of three measures2008In: Information Processing & Management, ISSN 0306-4573, E-ISSN 1873-5371, Vol. 44, no 1, p. 212-225Article in journal (Refereed)
  • 2.
    Ahlgren, Per
    et al.
    University College of Borås.
    Kekälainen, Jaana
    Indexing strategies for Swedish full text retrieval under different user scenarios2007In: Information Processing & Management, ISSN 0306-4573, E-ISSN 1873-5371, Vol. 43, no 1, p. 81-102Article in journal (Refereed)
    Abstract [en]

    This paper deals with Swedish full text retrieval and the problem of morphological variation of query terms in the document database. The effects of combination of indexing strategies with query terms on retrieval effectiveness were studied. Three of five tested combinations involved indexing strategies that used conflation, in the form of normalization. Further, two of these three combinations used indexing strategies that employed compound splitting. Normalization and compound splitting were performed by SWETWOL, a morphological analyzer for the Swedish language. A fourth combination attempted to group related terms by right hand truncation of query terms. The four combinations were compared to each other and to a baseline combination, where no attempt was made to counteract the problem of morphological variation of query terms in the document database. The five combinations were evaluated under six different user scenarios, where each scenario simulated a certain user type. The four alternative combinations outperformed the baseline, for each user scenario. The truncation combination had the best performance under each user scenario. The main conclusion of the paper is that normalization and right hand truncation (performed by a search expert) enhanced retrieval effectiveness in comparison to the baseline. The performance of the three combinations of indexing strategies with query terms based on normalization was not far below the performance of the truncation combination. (c) 2006 Elsevier Ltd. All rights reserved.

  • 3. Saarela, J
    et al.
    Turpeinen, Marko
    Korkea-aho, M
    Puskala, T
    Sulonen, R
    Logical Structure of a Hypermedia Newspaper1997In: Information Processing & Management, ISSN 0306-4573, E-ISSN 1873-5371, Vol. 33, no 5, p. 599-614Article in journal (Refereed)
    Abstract [en]

    The OtaOnline project at the Helsinki University of Technology has been deploying the distribution of Finnish newspapers such as Iltalehti, Aamulehti and Kauppalehti on the Internet since 1994, The editors produce the electronic counterpart of these papers by a conversion process from QuarkXpress documents to HyperText Markup Language. The project is about to step into a new phase by introducing an approach which provides many new features not available in the old process. This paper describes an object-oriented approach which implements the logical model of a hypermedia newspaper. This model encapsulates the structure of the hypermedia documents as well as their capability for transforming into different presentation formats. It also provides a semantical rating mechanism to be used with intelligent agents. A distribution scheme which enables efficient use of this model is also presented

  • 4.
    Sjöbergh, Jonas
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Older versions of the ROUGEeval summarization evaluation system were easier to fool2007In: Information Processing & Management, ISSN 0306-4573, E-ISSN 1873-5371, Vol. 43, no 6, p. 1500-1505Article in journal (Refereed)
    Abstract [en]

    We show some limitations of the ROUGE evaluation method for automatic summarization. We present a method for automatic summarization based on a Markov model of the source text. By a simple greedy word selection strategy, summaries with high ROUGE-scores are generated. These summaries would however not be considered good by human readers. The method can be adapted to trick different settings of the ROUGEeval package.

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