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• W2051972238 abstract "Recommender systems predict user preferences based on a range of available information. For systems in which users generate streams of content (e.g., blogs, periodically-updated newsfeeds), users may rate the produced content that they read, and be given accurate predictions about future content they are most likely to prefer. We design a distributed mechanism for predicting user ratings that avoids the disclosure of information to a centralized authority or an untrusted third party: users disclose the rating they give to certain content only to the user that produced this content. We demonstrate how rating prediction in this context can be formulated as a matrix factorization problem. Using this intuition, we propose a distributed gradient descent algorithm for its solution that abides with the above restriction on how information is exchanged between users. We formally analyse the convergence properties of this algorithm, showing that it reduces a weighted root mean square error of the accuracy of predictions. We also demonstrate how this technique can readily be used to offer optimal recommendation." @default.
• W2051972238 created "2016-06-24" @default.
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• W2051972238 date "2011-09-01" @default.
• W2051972238 modified "2023-09-27" @default.
• W2051972238 title "Distributed collaborative filtering over social networks" @default.
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• W2051972238 doi "https://doi.org/10.1109/allerton.2011.6120295" @default.
• W2051972238 hasPublicationYear "2011" @default.
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