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  1. Boldi, P.; Santini, M.; Vigna, S.: PageRank as a function of the damping factor (2005) 0.02 
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    Abstract
    PageRank is defined as the stationary state of a Markov chain. The chain is obtained by perturbing the transition matrix induced by a web graph with a damping factor alpha that spreads uniformly part of the rank. The choice of alpha is eminently empirical, and in most cases the original suggestion alpha=0.85 by Brin and Page is still used. Recently, however, the behaviour of PageRank with respect to changes in alpha was discovered to be useful in link-spam detection. Moreover, an analytical justification of the value chosen for alpha is still missing. In this paper, we give the first mathematical analysis of PageRank when alpha changes. In particular, we show that, contrarily to popular belief, for real-world graphs values of alpha close to 1 do not give a more meaningful ranking. Then, we give closed-form formulae for PageRank derivatives of any order, and an extension of the Power Method that approximates them with convergence O(t**k*alpha**t) for the k-th derivative. Finally, we show a tight connection between iterated computation and analytical behaviour by proving that the k-th iteration of the Power Method gives exactly the PageRank value obtained using a Maclaurin polynomial of degree k. The latter result paves the way towards the application of analytical methods to the study of PageRank.
    Date
    16. 1.2016 10:22:28
  2. Williamson, N.J.: Knowledge structures and the Internet : progress and prospects (2006) 0.02 
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    Date
    27.12.2008 15:56:22
    Source
    Knowledge organization for a global learning society: Proceedings of the 9th International ISKO Conference, 4-7 July 2006, Vienna, Austria. Hrsg.: G. Budin, C. Swertz u. K. Mitgutsch
  3. Park, E.-K.; Ra, D.-Y.; Jang, M.-G.: Techniques for improving web retrieval effectiveness (2005) 0.02 
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    Date
    26.12.2007 20:28:29
  4. Auletta, K: Googled : the end of the world as we know it (2009) 0.01 
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    Date
    11.12.2009 18:29:36
  5. Perez, E.: dtSearch: the little search engine that could (2004) 0.01 
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    Source
    Online. 29(2005) no.1, S.28-
  6. Bharat, K.: SearchPad : explicit capture of search context to support Web search (2000) 0.01 
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  7. MacLeod, R.: Promoting a subject gateway : a case study from EEVL (Edinburgh Engineering Virtual Library) (2000) 0.01 
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    Date
    22. 6.2002 19:40:22
  8. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.01 
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    Date
    25. 8.2005 17:42:22
  9. Bawden, D.: Google and the universe of knowledge (2008) 0.01 
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    Date
    7. 6.2008 16:22:20
  10. Sherman, C.: Reference resources on the Web (2000) 0.01 
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    Date
    29. 3.2002 17:49:46
  11. Price, A.: Five new Danish subject gateways under development (2000) 0.01 
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    Date
    22. 6.2002 19:41:31
  12. Bar-Ilan, J.: Methods for measuring search engine performance over time (2002) 0.01 
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    Date
    23. 3.2002 9:50:29
  13. Anderson, R.: ¬The (uncertain) future of libraries in a Google world : sounding an alarm (2005) 0.01 
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    Pages
    S.29-36
  14. Carroll, N.: Search engine optimization (2009) 0.01 
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    Date
    27. 8.2011 14:29:37
  15. Gardner, T.; Iannella, R.: Architecture and software solutions (2000) 0.01 
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    Date
    22. 6.2002 19:38:24
  16. Peereboom, M.: DutchESS : Dutch Electronic Subject Service - a Dutch national collaborative effort (2000) 0.01 
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    Date
    22. 6.2002 19:39:23
  17. Campbell, D.: Australian subject gateways : political and strategic issues (2000) 0.01 
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    Date
    22. 6.2002 19:41:16
  18. Dempsey, L.: ¬The subject gateway : experiences and issues based on the emergence of the Resource Discovery Network (2000) 0.01 
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    Date
    22. 6.2002 19:36:13
  19. Sandler, M.: Disruptive beneficence : the Google Print program and the future of libraries (2005) 0.01 
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    Pages
    S.5-22
  20. Phipps, S.E.; Maloney, K.: Choices in the paradigm shift : where next for libraries? (2005) 0.00 
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