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Combating Web Spam with TrustRank - http://dbpubs.stanford.edu:8090/pub/showDoc.Fulltext?lang=en&doc=2004-52&format=pdf&compression=&name=2004-52.pdf
Zoltan Gyongyi, Hector Garcia-Molina, Stanford University, and Jan Pedersen, Yahoo. Proceedings of the 30th VLDB Conference, 2004. The authors propose techniques which allow to semi-automatically identify reputable pages and then discover more good pages based on the structure of the web. ODP is mentioned because setting up ODP clones is a technique to influence PageRank: to balance this spamming technique, the authors removed all sites which are not listed in the major directories from the data set used for the experiment. |