Search (32 results, page 1 of 2)

  • × language_ss:"e"
  • × theme_ss:"Suchmaschinen"
  • × year_i:[2000 TO 2010}
  1. Spink, A.; Gunar, O.: E-Commerce Web queries : Excite and AskJeeves study (2001) 0.05 
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  2. Boldi, P.; Santini, M.; Vigna, S.: PageRank as a function of the damping factor (2005) 0.05 
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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
  3. Sugiura, A.; Etzioni, O.: Query routing for Web search engines : architecture and experiments (2000) 0.04 
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  4. MacLeod, R.: Promoting a subject gateway : a case study from EEVL (Edinburgh Engineering Virtual Library) (2000) 0.02 
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    Date
    22. 6.2002 19:40:22
  5. Back, J.: ¬An evaluation of relevancy ranking techniques used by Internet search engines (2000) 0.02 
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    Date
    25. 8.2005 17:42:22
  6. Bawden, D.: Google and the universe of knowledge (2008) 0.02 
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    Date
    7. 6.2008 16:22:20
  7. Burckhardt, D.: Historische Rezensionen online : Eine thematische Suchmaschine von Clio-online (2007) 0.02 
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    Abstract
    Historische Rezensionen online (HR O) ist eine auf geschichtswissenschaftliche Rezensionen fokussierte Suchmaschine. Sie berücksichtigt ausschließlich fachwissenschaftliche Besprechungen, die im Web veröffentlicht wurden und ohne Zugangsbeschränkungen im Volltext zur Verfügung stehen. Eingebunden in das Portal des DFG-geförderten Kooperationsprojektes Clio-online sind über eine einfache Suchmaske gegenwärtig mehr als 35.000 Rezensionen zu über 30.000 Publikationen im Volltext recherchierbar. Statt unter hohem Aufwand Daten zu erstellen oder manuell zu katalogisieren, werden bei HRO bereits vorhandene Texte und bibliografische Daten voll automatisiert gesammelt, verknüpft und in einem zentralen Suchindex aufbereitet. Die Spezialisierung auf eine Textsorte und die Anreicherung der Rezensionstexte mit den in der Verbunddatenbank des GBV bereits erfassten bibliografischen Informationen erlauben zudem zielgerichtete Anfragen nach bestimmten Autoren oder eingeschränkt auf einzelne Themenbereiche, ein Mehrwert für die Nutzerinnen und Nutzer von HRO gegenüber kommerziellen Suchmaschinen.
  8. Hoeber, O.; Yang, X.D.: Evaluating WordBars in exploratory Web search scenarios (2008) 0.02 
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  9. Price, A.: Five new Danish subject gateways under development (2000) 0.02 
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    Date
    22. 6.2002 19:41:31
  10. Gardner, T.; Iannella, R.: Architecture and software solutions (2000) 0.01 
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    Date
    22. 6.2002 19:38:24
  11. 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
  12. Campbell, D.: Australian subject gateways : political and strategic issues (2000) 0.01 
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    Date
    22. 6.2002 19:41:16
  13. 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
  14. Sandler, M.: Disruptive beneficence : the Google Print program and the future of libraries (2005) 0.01 
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    Pages
    S.5-22
  15. Heery, R.: Information gateways : collaboration and content (2000) 0.01 
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    Date
    22. 6.2002 19:38:54
  16. Price, A.: NOVAGate : a Nordic gateway to electronic resources in the forestry, veterinary and agricultural sciences (2000) 0.01 
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    Date
    22. 6.2002 19:41:00
  17. Koch, T.: Quality-controlled subject gateways : definitions, typologies, empirical overview (2000) 0.01 
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    Date
    22. 6.2002 19:37:55
  18. Rose, D.E.: Reconciling information-seeking behavior with search user interfaces for the Web (2006) 0.01 
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    Date
    22. 7.2006 17:58:06
  19. Williamson, N.J.: Knowledge structures and the Internet : progress and prospects (2006) 0.01 
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    Date
    27.12.2008 15:56:22
  20. Fischer, T.; Neuroth, H.: SSG-FI - special subject gateways to high quality Internet resources for scientific users (2000) 0.01 
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    Date
    22. 6.2002 19:40:42

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