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Title of Journal: Multimed Tools Appl

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Abbravation: Multimedia Tools and Applications

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Springer US

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DOI

10.1002/glia.20086

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1573-7721

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Categorization for grouping associative items usin

Authors: KyungYong Chung Daesung Lee Kuinam J Kim
Publish Date: 2011/11/10
Volume: 71, Issue: 2, Pages: 889-904
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Abstract

Recommendation systems have been investigated and implemented in many ways In particular in the case of a collaborative filtering system the most important issue is how to manipulate the personalized recommendation results for better user understandability and satisfaction A collaborative filtering system predicts items of interest for users based on predictive relationships discovered between each item and others This paper proposes a categorization for grouping associative items discovered by mining for the purpose of improving the accuracy and performance of itembased collaborative filtering It is possible that if an associative item is required to be simultaneously associated with all other groups in which it occurs the proposed method can collect associative items into relevant groups In addition the proposed method can result in improved predictive performance under circumstances of sparse data and coldstart initiation of collaborative filtering starting from a small number of items In addition this method can increase prediction accuracy and scalability because it removes the noise generated by ratings on items of dissimilar content or level of interest The approach is empirically evaluated by comparison with kmeans average link and robust using the MovieLens dataset The method was found to outperform existing methods significantly

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