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Abstract
This paper addresses the problem of extending an adaptive
information filtering system to make decisions about
the novelty and redundancy of relevant documents. It argues
that relevance and redundance should each be modelled
explicitly and separately. A set of five redundancy measures
are proposed and evaluated in experiments with and
without redundancy thresholds. The experimental results
demonstrate that the cosine similarity metric and a redundancy
measure based on a mixture of language...


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