Search (223 results, page 1 of 12)

  • × theme_ss:"Suchmaschinen"
  1. Eggeling, T.; Kroschel, A.: Alles finden im Web (2000) 0.07 
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    Date
    9. 7.2000 14:06:22
  2. Gardner, T.; Iannella, R.: Architecture and software solutions (2000) 0.06 
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    Date
    22. 6.2002 19:38:24
  3. Koch, T.: Quality-controlled subject gateways : definitions, typologies, empirical overview (2000) 0.05 
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    Date
    22. 6.2002 19:37:55
  4. Boldi, P.; Santini, M.; Vigna, S.: PageRank as a function of the damping factor (2005) 0.04 
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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
  5. Duval, B.K.; Main, L.: Searching the Internet : part 2 trail-blazers (1997) 0.04 
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    Content
    T.1 u.d.T.: Searching the Net: general overview in: 15(1996) no.4
    Date
    6. 3.1997 16:22:15
  6. Fischer, T.; Neuroth, H.: SSG-FI - special subject gateways to high quality Internet resources for scientific users (2000) 0.04 
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    Date
    22. 6.2002 19:40:42
  7. Large, A.; Beheshti, J.; Rahman, T.: Design criteria for children's Web portals : the users speak out (2002) 0.04 
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    Date
    2. 6.2005 10:34:22
  8. Nicholson, S.; Sierra, T.; Eseryel, U.Y.; Park, J.-H.; Barkow, P.; Pozo, E.J.; Ward, J.: How much of it is real? : analysis of paid placement in Web search engine results (2006) 0.04 
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    Date
    22. 7.2006 16:32:57
  9. Calishain, T.; Dornfest, R.: Google Hacks (2003) 0.03 
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  10. Patzwaldt, K.: Google Inside (2005) 0.03 
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    Abstract
    »Googeln« ist längst als Verb für die Internet-Suche in den Sprachgebrauch eingegangen, aber auch das Unternehmen selbst findet sich seit der 23. Ausgabe des Dudens im offiziellen Sprachschatz der Deutschen. Der Namen der Suchmaschine stammt vom Wort Googol, einer Eins mit hundert Nullen. Googol wurde von Milton Sirotta, einem Neffen des USMathematikers Edward Kasner, geprägt. Der Name verdeutlicht symbolisch das Ziel, die enorme Menge an Informationen im Web und auf der ganzen Welt zu organisieren. Die Gründer von Google konnten lange Zeit von einem Sympathie-Bonus zehren, der ihnen als Jungunternehmer und Garagenfirma entgegengebracht wurde - aber auch ein technischer Vorsprung gegenüber den damaligen und heutigen Konkurrenten sorgten für den Aufstieg des Unternehmens in der Gunst der Nutzer. Die Bekanntheit der Suchmaschine wurde fast ausschließlich über Mund-zu-Mund-Propaganda erreicht. Wichtig waren dabei die neuartige PageRank-Technologie, mit der die Websites komplex bewertet werden sowie das schlichte Design der Suchmaschine. Google profitiert zudem bis heute vom Ruf eines High-Tech-Unternehmes. Google ist seit Herbst 2004 ein börsennotiertes Unternehmen (mit mehr als 3.000 Mitarbeitern und über 100.000 Servern) und kann wohl auch im jahr 2005 die Spitzenposition im Suchmaschinenmarkt behaup ten: Während im Dezember 2004 im US-amerikanischen Markt der Anteil bei rund 48 Prozent der vermittelten Suchanfragen lag (einschließlich AOL, Netscape und Excite), beträgt dieser Anteil in Deutschland über 80 Prozent (einschließlich AOL und T-Online). Google hat den Erfolg jedoch nicht gepachtet: Die Hauptkonkurrenten Yahoo! und MSN sind Google im US-amerikanischen Markt dicht auf den Fersen. Und möglicherweise zieht eines Tages ein anderes Unternehmen mit einer völlig revolutionären Suchtechnologie an Google vorbei. Deshalb wird viel für die Entwicklung der Technologie und die Kundenbindung getan. Dazu gehören Entwicklungen wie die Toolbar, Deskbar, Desktop-Suche und der E-Mail-Dienst Gmail.
    Date
    10. 6.2005 17:43:22
  11. Page, L.; Brin, S.; Motwani, R.; Winograd, T.: ¬The PageRank citation ranking : Bringing order to the Web (1999) 0.03 
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  12. Stanley, T.: To meta-search or not to meta-search? (1999) 0.03 
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  13. Bar-Ilan, J.; Gutman,T.: How do search engines respond to some non-English queries? (2005) 0.03 
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  14. Li, L.; Shang, Y.; Zhang, W.: Improvement of HITS-based algorithms on Web documents 0.03 
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    Content
    Vgl.: http%3A%2F%2Fdelab.csd.auth.gr%2F~dimitris%2Fcourses%2Fir_spring06%2Fpage_rank_computing%2Fp527-li.pdf. Vgl. auch: http://www2002.org/CDROM/refereed/643/.
  15. Großjohann, K.: Gathering-, Harvesting-, Suchmaschinen (1996) 0.03 
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    Date
    7. 2.1996 22:38:41
    Pages
    22 S
  16. Höfer, W.: Detektive im Web (1999) 0.03 
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    Date
    22. 8.1999 20:22:06
  17. Rensman, J.: Blick ins Getriebe (1999) 0.03 
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    Date
    22. 8.1999 21:22:59
  18. Stock, M.; Stock, W.G.: Recherchieren im Internet (2004) 0.02 
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  19. Sülzer, T.: Bingen statt Googeln : Die neue Microsoft-Suchmaschine: Deutsche Version ist vorerst nur als "Beta" erreichbar (2009) 0.02 
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  20. Gossen, T.: Search engines for children : search user interfaces and information-seeking behaviour (2016) 0.02 
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