Evaluation of Collaborative Filtering Algorithms for Recommending Articles on CiteULike

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Presentation given at the Workshop "Web 3.0: Merging Semantic Web and Social Web" in the conference Hypertext 2009, Torino, Italy. The workshop online proceedings are here:http://ftp1.de.freebsd.org/Publications/CEUR-WS/Vol-467/

Formation Technologie

Evaluation of Collaborative Filtering Algorithms for Recommending Articles on CiteULike June 29th, 2009 HT 2009, Workshop “Web 3.0: Merging Semantic Web and Social Web” Dr. Peter Brusilovsky, Associate Professor Denis Parra, PhD Student School of Information Sciences University of Pittsburgh

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Motivation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Methods: CCF (2 / 2) 3 4 1 4 4 1 1 3 3 2 5 3 4 2 1 3 2 2 5 3 3 2

Methods: NwCF (2 / 2) 3 4 1 4 4 1 1 3 3 2 5 3 4 2 1 3 2 2 5 3 3 2

Methods: BM25 (2 / 2) Query terms Doc_1 Doc_2 Doc_3

The Study ,[object Object],[object Object],[object Object],[object Object]

Description of the Data ,[object Object],[object Object],Item # of unique instances users 358 articles 186,122 tags 51,903 annotations 902,711

Results (a) nDCG (b) Average Novelty (c) Precision_2@5 (d) Precision_2@10 (e) Precision_2_1@5 (f) Precision_2_1@10

Conclusions ,[object Object],[object Object],[object Object],[object Object]

Bibliography ,[object Object],[object Object]

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