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lecture17-linkanalysis-handout-6-per

Bad 7 sometimes need probabilistic analogs eg mail

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Unformatted text preview: nity – Goel+Goldstein 2010   If you point to a Bad node, you re Bad   If a Good node points to you, you re Good   Consumers whose friends spend a lot, spend a lot themselves   h\p://www.cs.cornell.edu/home/kleinber/networks ­book/ Good ? Bad 7 Sometimes need probabilistic analogs – e.g., mail spam Introduc)on to Informa)on Retrieval 8 Introduc)on to Informa)on Retrieval Our primary interest in this course S ec. 21.1 The Web as a Directed Graph   Analogs of most IR func*onality based purely on text   Scoring and ranking   Link ­based clustering – topical structure from links   Links as features in classifica*on – documents that link to one another are likely to be on the same subject Page A   Crawling hyperlink Anchor Page B Assump(on 1: A hyperlink between pages denotes a conferral of authority (quality signal)   Based on the...
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