document: Utility analysis for topically biased PageRank PageRank is known to be an efficient metric for computing general document importance in the Web . While commonly used as a one-size-fits-all measure , the ability to produce topically biased ranks has not yet been fully explored in detail . In particular , it was still unclear to what granularity of `` topic '' the computation of biased page ranks makes sense . In this paper we present the results of a thorough quantitative and qualitative analysis of biasing PageRank on Open Directory categories . We show that the MAP quality of Biased PageRank generally increases with the ODP level up to a certain point , thus sustaining the usage of more specialized categories to bias PageRank on , in order to improve topic specific search .
doc_bio_tags: O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O