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Towards better measures: evaluation of estimated resource description quality for distributed IR

Baillie, M. and Azzopardi, L. and Crestani, F. (2006) Towards better measures: evaluation of estimated resource description quality for distributed IR. In: First International Conference on Scalable Information Systems, 2006-05-30 - 2006-06-01, Hong Kong.

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    Abstract

    An open problem for Distributed Information Retrieval systems (DIR) is how to represent large document repositories, also known as resources, both accurately and efficiently. Obtaining resource description estimates is an important phase in DIR, especially in non-cooperative environments. Measuring the quality of an estimated resource description is a contentious issue as current measures do not provide an adequate indication of quality. In this paper, we provide an overview of these currently applied measures of resource description quality, before proposing the Kullback-Leibler (KL) divergence as an alternative. Through experimentation we illustrate the shortcomings of these past measures, whilst providing evidence that KL is a more appropriate measure of quality. When applying KL to compare different QBS algorithms, our experiments provide strong evidence in favour of a previously unsupported hypothesis originally posited in the initial Query-Based Sampling work.

    Item type: Conference or Workshop Item (Paper)
    ID code: 2753
    Keywords: cataloguing, resource description, metadata, information retrieval, searching, search algorithm, Electronic computers. Computer science
    Subjects: Science > Mathematics > Electronic computers. Computer science
    Department: Faculty of Science > Computer and Information Sciences
    Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 30 Mar 2007
    Last modified: 20 Jul 2013 21:49
    URI: http://strathprints.strath.ac.uk/id/eprint/2753

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