Document (#23773)

Author
Stock, M.
Stock, W.G.
Title
Internet-Suchwerkzeuge im Vergleich (IV) : Relevance Ranking nach "Popularität" von Webseiten: Google
Source
Password. 2001, H.2, S.20-27
Year
2001
Abstract
In unserem Retrievaltest von Suchwerkzeugen im World Wide Web (Password 11/2000) schnitt die Suchmaschine Google am besten ab. Im Vergleich zu anderen Search Engines setzt Google kaum auf Informationslinguistik, sondern auf Algorithmen, die sich aus den Besonderheiten der Web-Dokumente ableiten lassen. Kernstück der informationsstatistischen Technik ist das "PageRank"- Verfahren (benannt nach dem Entwickler Larry Page), das aus der Hypertextstruktur des Web die "Popularität" von Seiten anhand ihrer ein- und ausgehenden Links berechnet. Google besticht durch das Angebot intuitiv verstehbarer Suchbildschirme sowie durch einige sehr nützliche "Kleinigkeiten" wie die Angabe des Rangs einer Seite, Highlighting, Suchen in der Seite, Suchen innerhalb eines Suchergebnisses usw., alles verstaut in einer eigenen Befehlsleiste innerhalb des Browsers. Ähnlich wie RealNames bietet Google mit dem Produkt "AdWords" den Aufkauf von Suchtermen an. Nach einer Reihe von nunmehr vier Password-Artikeln über InternetSuchwerkzeugen im Vergleich wollen wir abschließend zu einer Bewertung kommen. Wie ist der Stand der Technik bei Directories und Search Engines aus informationswissenschaftlicher Sicht einzuschätzen? Werden die "typischen" Internetnutzer, die ja in der Regel keine Information Professionals sind, adäquat bedient? Und können auch Informationsfachleute von den Suchwerkzeugen profitieren?
Theme
Suchmaschinen
Retrievalalgorithmen
Object
Google

Similar documents (author)

  1. Stock, M.; Stock, W.G.: Klassifikation und terminologische Kontrolle : Yahoo!, Open Directory und Oingo im Vergleich (2000) 4.90
    4.9017544 = sum of:
      4.9017544 = weight(author_txt:stock in 6497) [ClassicSimilarity], result of:
        4.9017544 = fieldWeight in 6497, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          6.932128 = idf(docFreq=112, maxDocs=42596)
          0.5 = fieldNorm(doc=6497)
    
  2. Stock, M.; Stock, W.G.: Internet-Suchwerkzeuge im Vergleich (III) : Informationslinguistik und -statistik: AltaVista, FAST und Northern Light (2001) 4.90
    4.9017544 = sum of:
      4.9017544 = weight(author_txt:stock in 6579) [ClassicSimilarity], result of:
        4.9017544 = fieldWeight in 6579, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          6.932128 = idf(docFreq=112, maxDocs=42596)
          0.5 = fieldNorm(doc=6579)
    
  3. Stock, M.; Stock, W.G.: Internet-Suchwerkzeuge im Vergleich : Teil 1: Retrievaltests mit Known Item searches (2000) 4.90
    4.9017544 = sum of:
      4.9017544 = weight(author_txt:stock in 6773) [ClassicSimilarity], result of:
        4.9017544 = fieldWeight in 6773, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          6.932128 = idf(docFreq=112, maxDocs=42596)
          0.5 = fieldNorm(doc=6773)
    
  4. Stock, M.; Stock, W.G.: Medizininformationen : Literaturnachweise, Volltexte und klinische Entscheidungen aus einer Hand (2004) 4.90
    4.9017544 = sum of:
      4.9017544 = weight(author_txt:stock in 4289) [ClassicSimilarity], result of:
        4.9017544 = fieldWeight in 4289, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          6.932128 = idf(docFreq=112, maxDocs=42596)
          0.5 = fieldNorm(doc=4289)
    
  5. Stock, M.; Stock, W.G.: Online-Hosts für Wissenschaft, Technik und Medizin auf dem deutschen Informationsmarkt : Eine komparative Analyse (2005) 4.90
    4.9017544 = sum of:
      4.9017544 = weight(author_txt:stock in 4336) [ClassicSimilarity], result of:
        4.9017544 = fieldWeight in 4336, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          6.932128 = idf(docFreq=112, maxDocs=42596)
          0.5 = fieldNorm(doc=4336)
    

Similar documents (content)

  1. Stock, M.; Stock, W.G.: Internet-Suchwerkzeuge im Vergleich (III) : Informationslinguistik und -statistik: AltaVista, FAST und Northern Light (2001) 0.31
    0.30737585 = sum of:
      0.30737585 = product of:
        1.2807328 = sum of:
          0.16507767 = weight(abstract_txt:retrievaltest in 6579) [ClassicSimilarity], result of:
            0.16507767 = score(doc=6579,freq=1.0), product of:
              0.1659542 = queryWeight, product of:
                1.0644872 = boost
                9.094566 = idf(docFreq=12, maxDocs=42596)
                0.017142171 = queryNorm
              0.9947182 = fieldWeight in 6579, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.094566 = idf(docFreq=12, maxDocs=42596)
                0.109375 = fieldNorm(doc=6579)
          0.1694748 = weight(abstract_txt:suchwerkzeuge in 6579) [ClassicSimilarity], result of:
            0.1694748 = score(doc=6579,freq=1.0), product of:
              0.16888826 = queryWeight, product of:
                1.073856 = boost
                9.174609 = idf(docFreq=11, maxDocs=42596)
                0.017142171 = queryNorm
              1.0034729 = fieldWeight in 6579, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.174609 = idf(docFreq=11, maxDocs=42596)
                0.109375 = fieldNorm(doc=6579)
          0.44103286 = weight(title_txt:informationslinguistik in 6579) [ClassicSimilarity], result of:
            0.44103286 = score(doc=6579,freq=1.0), product of:
              0.1841459 = queryWeight, product of:
                1.1213143 = boost
                9.580074 = idf(docFreq=7, maxDocs=42596)
                0.017142171 = queryNorm
              2.3950186 = fieldWeight in 6579, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.580074 = idf(docFreq=7, maxDocs=42596)
                0.25 = fieldNorm(doc=6579)
          0.052290156 = weight(abstract_txt:einer in 6579) [ClassicSimilarity], result of:
            0.052290156 = score(doc=6579,freq=1.0), product of:
              0.12241351 = queryWeight, product of:
                1.8284832 = boost
                3.905463 = idf(docFreq=2330, maxDocs=42596)
                0.017142171 = queryNorm
              0.42716002 = fieldWeight in 6579, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.905463 = idf(docFreq=2330, maxDocs=42596)
                0.109375 = fieldNorm(doc=6579)
          0.280632 = weight(abstract_txt:password in 6579) [ClassicSimilarity], result of:
            0.280632 = score(doc=6579,freq=1.0), product of:
              0.29782706 = queryWeight, product of:
                2.0167098 = boost
                8.614993 = idf(docFreq=20, maxDocs=42596)
                0.017142171 = queryNorm
              0.94226485 = fieldWeight in 6579, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.614993 = idf(docFreq=20, maxDocs=42596)
                0.109375 = fieldNorm(doc=6579)
          0.17222533 = weight(abstract_txt:google in 6579) [ClassicSimilarity], result of:
            0.17222533 = score(doc=6579,freq=1.0), product of:
              0.29191118 = queryWeight, product of:
                3.15687 = boost
                5.3942146 = idf(docFreq=525, maxDocs=42596)
                0.017142171 = queryNorm
              0.5899922 = fieldWeight in 6579, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.3942146 = idf(docFreq=525, maxDocs=42596)
                0.109375 = fieldNorm(doc=6579)
        0.24 = coord(6/25)
    
  2. Stock, M.; Stock, W.G.: Klassifikation und terminologische Kontrolle : Yahoo!, Open Directory und Oingo im Vergleich (2000) 0.15
    0.15133487 = sum of:
      0.15133487 = product of:
        0.7566743 = sum of:
          0.034214247 = weight(abstract_txt:durch in 6497) [ClassicSimilarity], result of:
            0.034214247 = score(doc=6497,freq=1.0), product of:
              0.07322803 = queryWeight, product of:
                4.2718062 = idf(docFreq=1615, maxDocs=42596)
                0.017142171 = queryNorm
              0.4672288 = fieldWeight in 6497, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.2718062 = idf(docFreq=1615, maxDocs=42596)
                0.109375 = fieldNorm(doc=6497)
          0.16507767 = weight(abstract_txt:retrievaltest in 6497) [ClassicSimilarity], result of:
            0.16507767 = score(doc=6497,freq=1.0), product of:
              0.1659542 = queryWeight, product of:
                1.0644872 = boost
                9.094566 = idf(docFreq=12, maxDocs=42596)
                0.017142171 = queryNorm
              0.9947182 = fieldWeight in 6497, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.094566 = idf(docFreq=12, maxDocs=42596)
                0.109375 = fieldNorm(doc=6497)
          0.1694748 = weight(abstract_txt:suchwerkzeuge in 6497) [ClassicSimilarity], result of:
            0.1694748 = score(doc=6497,freq=1.0), product of:
              0.16888826 = queryWeight, product of:
                1.073856 = boost
                9.174609 = idf(docFreq=11, maxDocs=42596)
                0.017142171 = queryNorm
              1.0034729 = fieldWeight in 6497, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.174609 = idf(docFreq=11, maxDocs=42596)
                0.109375 = fieldNorm(doc=6497)
          0.10727558 = weight(abstract_txt:technik in 6497) [ClassicSimilarity], result of:
            0.10727558 = score(doc=6497,freq=1.0), product of:
              0.15687002 = queryWeight, product of:
                1.46363 = boost
                6.2523437 = idf(docFreq=222, maxDocs=42596)
                0.017142171 = queryNorm
              0.6838501 = fieldWeight in 6497, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2523437 = idf(docFreq=222, maxDocs=42596)
                0.109375 = fieldNorm(doc=6497)
          0.280632 = weight(abstract_txt:password in 6497) [ClassicSimilarity], result of:
            0.280632 = score(doc=6497,freq=1.0), product of:
              0.29782706 = queryWeight, product of:
                2.0167098 = boost
                8.614993 = idf(docFreq=20, maxDocs=42596)
                0.017142171 = queryNorm
              0.94226485 = fieldWeight in 6497, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.614993 = idf(docFreq=20, maxDocs=42596)
                0.109375 = fieldNorm(doc=6497)
        0.2 = coord(5/25)
    
  3. Hahn, U.: Informationslinguistik : II: Einführung in das linguistische Information Retrieval (1985) 0.14
    0.13623345 = sum of:
      0.13623345 = product of:
        0.68116724 = sum of:
          0.017280804 = weight(abstract_txt:durch in 4117) [ClassicSimilarity], result of:
            0.017280804 = score(doc=4117,freq=2.0), product of:
              0.07322803 = queryWeight, product of:
                4.2718062 = idf(docFreq=1615, maxDocs=42596)
                0.017142171 = queryNorm
              0.23598619 = fieldWeight in 4117, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.2718062 = idf(docFreq=1615, maxDocs=42596)
                0.0390625 = fieldNorm(doc=4117)
          0.55129105 = weight(title_txt:informationslinguistik in 4117) [ClassicSimilarity], result of:
            0.55129105 = score(doc=4117,freq=1.0), product of:
              0.1841459 = queryWeight, product of:
                1.1213143 = boost
                9.580074 = idf(docFreq=7, maxDocs=42596)
                0.017142171 = queryNorm
              2.9937732 = fieldWeight in 4117, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.580074 = idf(docFreq=7, maxDocs=42596)
                0.3125 = fieldNorm(doc=4117)
          0.036249883 = weight(abstract_txt:innerhalb in 4117) [ClassicSimilarity], result of:
            0.036249883 = score(doc=4117,freq=1.0), product of:
              0.15118748 = queryWeight, product of:
                1.4368758 = boost
                6.138055 = idf(docFreq=249, maxDocs=42596)
                0.017142171 = queryNorm
              0.23976776 = fieldWeight in 4117, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.138055 = idf(docFreq=249, maxDocs=42596)
                0.0390625 = fieldNorm(doc=4117)
          0.04399936 = weight(abstract_txt:suchen in 4117) [ClassicSimilarity], result of:
            0.04399936 = score(doc=4117,freq=1.0), product of:
              0.17203188 = queryWeight, product of:
                1.5327305 = boost
                6.547528 = idf(docFreq=165, maxDocs=42596)
                0.017142171 = queryNorm
              0.25576282 = fieldWeight in 4117, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.547528 = idf(docFreq=165, maxDocs=42596)
                0.0390625 = fieldNorm(doc=4117)
          0.032346144 = weight(abstract_txt:einer in 4117) [ClassicSimilarity], result of:
            0.032346144 = score(doc=4117,freq=3.0), product of:
              0.12241351 = queryWeight, product of:
                1.8284832 = boost
                3.905463 = idf(docFreq=2330, maxDocs=42596)
                0.017142171 = queryNorm
              0.26423672 = fieldWeight in 4117, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.905463 = idf(docFreq=2330, maxDocs=42596)
                0.0390625 = fieldNorm(doc=4117)
        0.2 = coord(5/25)
    
  4. Hahn, U.: Informationslinguistik : I: Einführung in das linguistische Information Retrieval (1985) 0.11
    0.10504318 = sum of:
      0.10504318 = product of:
        0.6565199 = sum of:
          0.020736964 = weight(abstract_txt:durch in 4116) [ClassicSimilarity], result of:
            0.020736964 = score(doc=4116,freq=2.0), product of:
              0.07322803 = queryWeight, product of:
                4.2718062 = idf(docFreq=1615, maxDocs=42596)
                0.017142171 = queryNorm
              0.28318343 = fieldWeight in 4116, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.2718062 = idf(docFreq=1615, maxDocs=42596)
                0.046875 = fieldNorm(doc=4116)
          0.55129105 = weight(title_txt:informationslinguistik in 4116) [ClassicSimilarity], result of:
            0.55129105 = score(doc=4116,freq=1.0), product of:
              0.1841459 = queryWeight, product of:
                1.1213143 = boost
                9.580074 = idf(docFreq=7, maxDocs=42596)
                0.017142171 = queryNorm
              2.9937732 = fieldWeight in 4116, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                9.580074 = idf(docFreq=7, maxDocs=42596)
                0.3125 = fieldNorm(doc=4116)
          0.05279923 = weight(abstract_txt:suchen in 4116) [ClassicSimilarity], result of:
            0.05279923 = score(doc=4116,freq=1.0), product of:
              0.17203188 = queryWeight, product of:
                1.5327305 = boost
                6.547528 = idf(docFreq=165, maxDocs=42596)
                0.017142171 = queryNorm
              0.30691537 = fieldWeight in 4116, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.547528 = idf(docFreq=165, maxDocs=42596)
                0.046875 = fieldNorm(doc=4116)
          0.03169262 = weight(abstract_txt:einer in 4116) [ClassicSimilarity], result of:
            0.03169262 = score(doc=4116,freq=2.0), product of:
              0.12241351 = queryWeight, product of:
                1.8284832 = boost
                3.905463 = idf(docFreq=2330, maxDocs=42596)
                0.017142171 = queryNorm
              0.25889805 = fieldWeight in 4116, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.905463 = idf(docFreq=2330, maxDocs=42596)
                0.046875 = fieldNorm(doc=4116)
        0.16 = coord(4/25)
    
  5. Dzeyk, W.: Effektiv und nutzerfreundlich : Einsatz von semantischen Technologien und Usability-Methoden zur Verbesserung der medizinischen Literatursuche (2010) 0.10
    0.09923278 = sum of:
      0.09923278 = product of:
        0.4134699 = sum of:
          0.02993123 = weight(abstract_txt:durch in 417) [ClassicSimilarity], result of:
            0.02993123 = score(doc=417,freq=6.0), product of:
              0.07322803 = queryWeight, product of:
                4.2718062 = idf(docFreq=1615, maxDocs=42596)
                0.017142171 = queryNorm
              0.40874007 = fieldWeight in 417, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.2718062 = idf(docFreq=1615, maxDocs=42596)
                0.0390625 = fieldNorm(doc=417)
          0.054182347 = weight(abstract_txt:technik in 417) [ClassicSimilarity], result of:
            0.054182347 = score(doc=417,freq=2.0), product of:
              0.15687002 = queryWeight, product of:
                1.46363 = boost
                6.2523437 = idf(docFreq=222, maxDocs=42596)
                0.017142171 = queryNorm
              0.34539643 = fieldWeight in 417, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.2523437 = idf(docFreq=222, maxDocs=42596)
                0.0390625 = fieldNorm(doc=417)
          0.019667108 = weight(abstract_txt:nach in 417) [ClassicSimilarity], result of:
            0.019667108 = score(doc=417,freq=1.0), product of:
              0.115124784 = queryWeight, product of:
                1.5356469 = boost
                4.373324 = idf(docFreq=1459, maxDocs=42596)
                0.017142171 = queryNorm
              0.17083296 = fieldWeight in 417, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.373324 = idf(docFreq=1459, maxDocs=42596)
                0.0390625 = fieldNorm(doc=417)
          0.018675055 = weight(abstract_txt:einer in 417) [ClassicSimilarity], result of:
            0.018675055 = score(doc=417,freq=1.0), product of:
              0.12241351 = queryWeight, product of:
                1.8284832 = boost
                3.905463 = idf(docFreq=2330, maxDocs=42596)
                0.017142171 = queryNorm
              0.15255715 = fieldWeight in 417, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.905463 = idf(docFreq=2330, maxDocs=42596)
                0.0390625 = fieldNorm(doc=417)
          0.14034839 = weight(abstract_txt:vergleich in 417) [ClassicSimilarity], result of:
            0.14034839 = score(doc=417,freq=4.0), product of:
              0.2688191 = queryWeight, product of:
                2.3465889 = boost
                6.6827817 = idf(docFreq=144, maxDocs=42596)
                0.017142171 = queryNorm
              0.52209234 = fieldWeight in 417, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.6827817 = idf(docFreq=144, maxDocs=42596)
                0.0390625 = fieldNorm(doc=417)
          0.15066577 = weight(abstract_txt:google in 417) [ClassicSimilarity], result of:
            0.15066577 = score(doc=417,freq=6.0), product of:
              0.29191118 = queryWeight, product of:
                3.15687 = boost
                5.3942146 = idf(docFreq=525, maxDocs=42596)
                0.017142171 = queryNorm
              0.5161357 = fieldWeight in 417, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                5.3942146 = idf(docFreq=525, maxDocs=42596)
                0.0390625 = fieldNorm(doc=417)
        0.24 = coord(6/25)