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Domain Integration Techniques for Discovering Hidden Clusters using Collaborative Filtering Brandy Brewster.

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Presentation on theme: "Domain Integration Techniques for Discovering Hidden Clusters using Collaborative Filtering Brandy Brewster."— Presentation transcript:

1 Domain Integration Techniques for Discovering Hidden Clusters using Collaborative Filtering Brandy Brewster

2 What is a Recommender System? Existing information Ratings Prediction User/Item pairs

3 How do they work? Collaborative Filtering –Rating-to-Rating –Amazon.com Semantic/Content Based Filtering –Item-to-Item –Netflix.com

4 Caveats Shortcomings of current algorithms –Netflix 8.5% improvement Scarcity of data

5 The Data GroupLens –MovieLens –Book-Crossing Baylor Library –Marc Records Amazon –Web Services

6 The Data GroupLens –MovieLens –Book-Crossing Baylor Library –Marc Records Amazon –Web Services

7 The Data GroupLens –MovieLens –Book-Crossing Baylor Library –Marc Records Amazon –Web Services

8 Domain Integration

9 Testing the System Data Set –278,858 users total Test Set –27,081

10 Measuring the Results Mean Absolute Error – Coverage –

11 Preliminary Results

12 Future Work

13 Questions?


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