Document (#37349)

Author
Weinhold, T.
Bekavec, B.
Schneider, G.
Bauer, L.
Böller, N.
Title
Wissenschaftliche Suchmaschinen : Übersicht, Technologien, Funktionen und Vergleich
Source
Handbuch Internet-Suchmaschinen, 2: Neue Entwicklungen in der Web-Suche. Hrsg.: D. Lewandowski
Imprint
Heidelberg : Akademische Verlagsgesellschaft AKA
Year
2011
Pages
S.141-177
Abstract
Dieser Beitrag beschäftigt sich primär mit der technischen Funktionsweise von wissenschaftlichen Suchmaschinen. Nach einer kurzen Einführung über das Angebot von wissenschaftlichen Informationen im Internet erfolgt zunächst eine Definition des Begriffs der wissenschaftlichen Suchmaschine. Darauf aufbauend wird dargestellt, welche Stärken und Schwächen wissenschaftliche Suchmaschinen gegenwärtig aufweisen und für welche Einsatzzwecke sie besonders geeignet sind. Anschließend wird die technische Funktionsweise dieser Suchdienste beschrieben, wobei insbesondere auf jene Aspekte eingegangen wird, in denen sich wissenschaftliche von allgemeinen Suchmaschinen unterscheiden. Neben dem internen Aufbau der Suchmaschinen wird in diesem Zusammenhang auch auf die von wissenschaftlichen Suchmaschinen angebotenen Suchoperatoren und Interaktionsmechanismen eingegangen. Wichtig sind in diesem Kontext insbesondere auch der Zugriff und die Referenzierung von Dokumenten. Abschließend wird anhand einer von den Autoren erarbeiteten Kriterienliste ein vergleichender Überblick über am Markt existierende, wissenschaftliche Suchmaschinen gegeben.
Theme
Suchmaschinen
Object
Google Scholar
CiteSeer

Similar documents (author)

  1. Bauer, G.; Schneider, C.: PADOK-II : Untersuchungen zur Volltextproblematik und zur interpretativen Analyse der Retrievalprotokolle (1990) 5.28
    5.2796 = sum of:
      5.2796 = sum of:
        2.4780273 = weight(author_txt:schneider in 4233) [ClassicSimilarity], result of:
          2.4780273 = score(doc=4233,freq=1.0), product of:
            0.67763186 = queryWeight, product of:
              7.3137865 = idf(docFreq=75, maxDocs=41962)
              0.09265131 = queryNorm
            3.6568933 = fieldWeight in 4233, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.3137865 = idf(docFreq=75, maxDocs=41962)
              0.5 = fieldNorm(doc=4233)
        2.8015726 = weight(author_txt:bauer in 4233) [ClassicSimilarity], result of:
          2.8015726 = score(doc=4233,freq=1.0), product of:
            0.7354012 = queryWeight, product of:
              1.0417542 = boost
              7.619168 = idf(docFreq=55, maxDocs=41962)
              0.09265131 = queryNorm
            3.809584 = fieldWeight in 4233, product of:
              1.0 = tf(freq=1.0), with freq of:
                1.0 = termFreq=1.0
              7.619168 = idf(docFreq=55, maxDocs=41962)
              0.5 = fieldNorm(doc=4233)
    
  2. Bauer, K.: Who goes where? : Measuring library Web site usage (2000) 1.75
    1.750983 = sum of:
      1.750983 = product of:
        3.501966 = sum of:
          3.501966 = weight(author_txt:bauer in 104) [ClassicSimilarity], result of:
            3.501966 = score(doc=104,freq=1.0), product of:
              0.7354012 = queryWeight, product of:
                1.0417542 = boost
                7.619168 = idf(docFreq=55, maxDocs=41962)
                0.09265131 = queryNorm
              4.76198 = fieldWeight in 104, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.619168 = idf(docFreq=55, maxDocs=41962)
                0.625 = fieldNorm(doc=104)
        0.5 = coord(1/2)
    
  3. Bauer, G.: Anwendung des Prinzips der Facettenklassifikation für den Aufbau von Thesauri : Erläutert am Beispiel "Thesaurussystem Chemie" (1967) 1.75
    1.750983 = sum of:
      1.750983 = product of:
        3.501966 = sum of:
          3.501966 = weight(author_txt:bauer in 1919) [ClassicSimilarity], result of:
            3.501966 = score(doc=1919,freq=1.0), product of:
              0.7354012 = queryWeight, product of:
                1.0417542 = boost
                7.619168 = idf(docFreq=55, maxDocs=41962)
                0.09265131 = queryNorm
              4.76198 = fieldWeight in 1919, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.619168 = idf(docFreq=55, maxDocs=41962)
                0.625 = fieldNorm(doc=1919)
        0.5 = coord(1/2)
    
  4. Bauer, G.: ¬Die Bedeutung der Kategorien als "Ordnungsmittel" in Thesauri und Speichern der elektronischen Datenverarbeitungsanlagen (1968) 1.75
    1.750983 = sum of:
      1.750983 = product of:
        3.501966 = sum of:
          3.501966 = weight(author_txt:bauer in 1920) [ClassicSimilarity], result of:
            3.501966 = score(doc=1920,freq=1.0), product of:
              0.7354012 = queryWeight, product of:
                1.0417542 = boost
                7.619168 = idf(docFreq=55, maxDocs=41962)
                0.09265131 = queryNorm
              4.76198 = fieldWeight in 1920, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.619168 = idf(docFreq=55, maxDocs=41962)
                0.625 = fieldNorm(doc=1920)
        0.5 = coord(1/2)
    
  5. Bauer, G.: Semantische Information (1983) 1.75
    1.750983 = sum of:
      1.750983 = product of:
        3.501966 = sum of:
          3.501966 = weight(author_txt:bauer in 2441) [ClassicSimilarity], result of:
            3.501966 = score(doc=2441,freq=1.0), product of:
              0.7354012 = queryWeight, product of:
                1.0417542 = boost
                7.619168 = idf(docFreq=55, maxDocs=41962)
                0.09265131 = queryNorm
              4.76198 = fieldWeight in 2441, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.619168 = idf(docFreq=55, maxDocs=41962)
                0.625 = fieldNorm(doc=2441)
        0.5 = coord(1/2)
    

Similar documents (content)

  1. Wegweiser im Netz : Qualität und Nutzung von Suchmaschinen (2004) 0.38
    0.383076 = sum of:
      0.383076 = product of:
        0.8706273 = sum of:
          0.01377041 = weight(abstract_txt:auch in 3859) [ClassicSimilarity], result of:
            0.01377041 = score(doc=3859,freq=1.0), product of:
              0.06661247 = queryWeight, product of:
                1.0013278 = boost
                3.7800999 = idf(docFreq=2602, maxDocs=41962)
                0.017598514 = queryNorm
              0.20672421 = fieldWeight in 3859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.7800999 = idf(docFreq=2602, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.015269673 = weight(abstract_txt:einer in 3859) [ClassicSimilarity], result of:
            0.015269673 = score(doc=3859,freq=1.0), product of:
              0.07136372 = queryWeight, product of:
                1.0364234 = boost
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.017598514 = queryNorm
              0.21396971 = fieldWeight in 3859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.035172727 = weight(abstract_txt:sind in 3859) [ClassicSimilarity], result of:
            0.035172727 = score(doc=3859,freq=5.0), product of:
              0.07278998 = queryWeight, product of:
                1.0467291 = boost
                3.951494 = idf(docFreq=2192, maxDocs=41962)
                0.017598514 = queryNorm
              0.48320836 = fieldWeight in 3859, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                3.951494 = idf(docFreq=2192, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.06301118 = weight(abstract_txt:suchdienste in 3859) [ClassicSimilarity], result of:
            0.06301118 = score(doc=3859,freq=1.0), product of:
              0.14572228 = queryWeight, product of:
                1.0472406 = boost
                7.9068503 = idf(docFreq=41, maxDocs=41962)
                0.017598514 = queryNorm
              0.4324059 = fieldWeight in 3859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.9068503 = idf(docFreq=41, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.022927687 = weight(abstract_txt:über in 3859) [ClassicSimilarity], result of:
            0.022927687 = score(doc=3859,freq=2.0), product of:
              0.074271314 = queryWeight, product of:
                1.0573263 = boost
                3.9914994 = idf(docFreq=2106, maxDocs=41962)
                0.017598514 = queryNorm
              0.30870178 = fieldWeight in 3859, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9914994 = idf(docFreq=2106, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.021945674 = weight(abstract_txt:dieser in 3859) [ClassicSimilarity], result of:
            0.021945674 = score(doc=3859,freq=1.0), product of:
              0.09088458 = queryWeight, product of:
                1.1696168 = boost
                4.4154058 = idf(docFreq=1378, maxDocs=41962)
                0.017598514 = queryNorm
              0.2414675 = fieldWeight in 3859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.4154058 = idf(docFreq=1378, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.039103594 = weight(abstract_txt:welche in 3859) [ClassicSimilarity], result of:
            0.039103594 = score(doc=3859,freq=1.0), product of:
              0.13357814 = queryWeight, product of:
                1.4179672 = boost
                5.3529506 = idf(docFreq=539, maxDocs=41962)
                0.017598514 = queryNorm
              0.29273948 = fieldWeight in 3859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.3529506 = idf(docFreq=539, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.081310116 = weight(abstract_txt:eingegangen in 3859) [ClassicSimilarity], result of:
            0.081310116 = score(doc=3859,freq=1.0), product of:
              0.21761425 = queryWeight, product of:
                1.8098482 = boost
                6.8323355 = idf(docFreq=122, maxDocs=41962)
                0.017598514 = queryNorm
              0.37364334 = fieldWeight in 3859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8323355 = idf(docFreq=122, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.060794577 = weight(abstract_txt:wird in 3859) [ClassicSimilarity], result of:
            0.060794577 = score(doc=3859,freq=3.0), product of:
              0.1686969 = queryWeight, product of:
                2.5195446 = boost
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.017598514 = queryNorm
              0.36037758 = fieldWeight in 3859, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.11248525 = weight(abstract_txt:wissenschaftliche in 3859) [ClassicSimilarity], result of:
            0.11248525 = score(doc=3859,freq=1.0), product of:
              0.3404066 = queryWeight, product of:
                3.2011976 = boost
                6.042401 = idf(docFreq=270, maxDocs=41962)
                0.017598514 = queryNorm
              0.3304438 = fieldWeight in 3859, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.042401 = idf(docFreq=270, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
          0.40483636 = weight(abstract_txt:suchmaschinen in 3859) [ClassicSimilarity], result of:
            0.40483636 = score(doc=3859,freq=5.0), product of:
              0.5633911 = queryWeight, product of:
                5.448005 = boost
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.017598514 = queryNorm
              0.71857077 = fieldWeight in 3859, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.0546875 = fieldNorm(doc=3859)
        0.44 = coord(11/25)
    
  2. Lewandowski, D.: Suchmaschinen verstehen (2015) 0.37
    0.37408686 = sum of:
      0.37408686 = product of:
        1.1690215 = sum of:
          0.02782043 = weight(abstract_txt:auch in 581) [ClassicSimilarity], result of:
            0.02782043 = score(doc=581,freq=2.0), product of:
              0.06661247 = queryWeight, product of:
                1.0013278 = boost
                3.7800999 = idf(docFreq=2602, maxDocs=41962)
                0.017598514 = queryNorm
              0.417646 = fieldWeight in 581, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.7800999 = idf(docFreq=2602, maxDocs=41962)
                0.078125 = fieldNorm(doc=581)
          0.08291687 = weight(abstract_txt:stärken in 581) [ClassicSimilarity], result of:
            0.08291687 = score(doc=581,freq=1.0), product of:
              0.1379563 = queryWeight, product of:
                1.0189533 = boost
                7.693276 = idf(docFreq=51, maxDocs=41962)
                0.017598514 = queryNorm
              0.6010372 = fieldWeight in 581, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.693276 = idf(docFreq=51, maxDocs=41962)
                0.078125 = fieldNorm(doc=581)
          0.021813821 = weight(abstract_txt:einer in 581) [ClassicSimilarity], result of:
            0.021813821 = score(doc=581,freq=1.0), product of:
              0.07136372 = queryWeight, product of:
                1.0364234 = boost
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.017598514 = queryNorm
              0.30567104 = fieldWeight in 581, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.078125 = fieldNorm(doc=581)
          0.02247103 = weight(abstract_txt:sind in 581) [ClassicSimilarity], result of:
            0.02247103 = score(doc=581,freq=1.0), product of:
              0.07278998 = queryWeight, product of:
                1.0467291 = boost
                3.951494 = idf(docFreq=2192, maxDocs=41962)
                0.017598514 = queryNorm
              0.30871046 = fieldWeight in 581, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.951494 = idf(docFreq=2192, maxDocs=41962)
                0.078125 = fieldNorm(doc=581)
          0.09538408 = weight(abstract_txt:schwächen in 581) [ClassicSimilarity], result of:
            0.09538408 = score(doc=581,freq=1.0), product of:
              0.15145963 = queryWeight, product of:
                1.0676575 = boost
                8.061001 = idf(docFreq=35, maxDocs=41962)
                0.017598514 = queryNorm
              0.6297657 = fieldWeight in 581, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.061001 = idf(docFreq=35, maxDocs=41962)
                0.078125 = fieldNorm(doc=581)
          0.11615731 = weight(abstract_txt:eingegangen in 581) [ClassicSimilarity], result of:
            0.11615731 = score(doc=581,freq=1.0), product of:
              0.21761425 = queryWeight, product of:
                1.8098482 = boost
                6.8323355 = idf(docFreq=122, maxDocs=41962)
                0.017598514 = queryNorm
              0.5337762 = fieldWeight in 581, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8323355 = idf(docFreq=122, maxDocs=41962)
                0.078125 = fieldNorm(doc=581)
          0.070912234 = weight(abstract_txt:wird in 581) [ClassicSimilarity], result of:
            0.070912234 = score(doc=581,freq=2.0), product of:
              0.1686969 = queryWeight, product of:
                2.5195446 = boost
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.017598514 = queryNorm
              0.42035294 = fieldWeight in 581, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.078125 = fieldNorm(doc=581)
          0.7315457 = weight(abstract_txt:suchmaschinen in 581) [ClassicSimilarity], result of:
            0.7315457 = score(doc=581,freq=8.0), product of:
              0.5633911 = queryWeight, product of:
                5.448005 = boost
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.017598514 = queryNorm
              1.2984687 = fieldWeight in 581, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.078125 = fieldNorm(doc=581)
        0.32 = coord(8/25)
    
  3. Lewandowski, D.: Web Information Retrieval : Technologien zur Informationssuche im Internet (2005) 0.37
    0.3738276 = sum of:
      0.3738276 = product of:
        0.7788075 = sum of:
          0.027258342 = weight(abstract_txt:auch in 636) [ClassicSimilarity], result of:
            0.027258342 = score(doc=636,freq=12.0), product of:
              0.06661247 = queryWeight, product of:
                1.0013278 = boost
                3.7800999 = idf(docFreq=2602, maxDocs=41962)
                0.017598514 = queryNorm
              0.40920782 = fieldWeight in 636, product of:
                3.4641016 = tf(freq=12.0), with freq of:
                  12.0 = termFreq=12.0
                3.7800999 = idf(docFreq=2602, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.017451057 = weight(abstract_txt:einer in 636) [ClassicSimilarity], result of:
            0.017451057 = score(doc=636,freq=4.0), product of:
              0.07136372 = queryWeight, product of:
                1.0364234 = boost
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.017598514 = queryNorm
              0.24453682 = fieldWeight in 636, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.022017023 = weight(abstract_txt:sind in 636) [ClassicSimilarity], result of:
            0.022017023 = score(doc=636,freq=6.0), product of:
              0.07278998 = queryWeight, product of:
                1.0467291 = boost
                3.951494 = idf(docFreq=2192, maxDocs=41962)
                0.017598514 = queryNorm
              0.30247325 = fieldWeight in 636, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                3.951494 = idf(docFreq=2192, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.009264184 = weight(abstract_txt:über in 636) [ClassicSimilarity], result of:
            0.009264184 = score(doc=636,freq=1.0), product of:
              0.074271314 = queryWeight, product of:
                1.0573263 = boost
                3.9914994 = idf(docFreq=2106, maxDocs=41962)
                0.017598514 = queryNorm
              0.12473436 = fieldWeight in 636, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9914994 = idf(docFreq=2106, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.012540384 = weight(abstract_txt:dieser in 636) [ClassicSimilarity], result of:
            0.012540384 = score(doc=636,freq=1.0), product of:
              0.09088458 = queryWeight, product of:
                1.1696168 = boost
                4.4154058 = idf(docFreq=1378, maxDocs=41962)
                0.017598514 = queryNorm
              0.13798143 = fieldWeight in 636, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.4154058 = idf(docFreq=1378, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.027715605 = weight(abstract_txt:diesem in 636) [ClassicSimilarity], result of:
            0.027715605 = score(doc=636,freq=3.0), product of:
              0.10691996 = queryWeight, product of:
                1.2686093 = boost
                4.789111 = idf(docFreq=948, maxDocs=41962)
                0.017598514 = queryNorm
              0.25921825 = fieldWeight in 636, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.789111 = idf(docFreq=948, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.03870252 = weight(abstract_txt:welche in 636) [ClassicSimilarity], result of:
            0.03870252 = score(doc=636,freq=3.0), product of:
              0.13357814 = queryWeight, product of:
                1.4179672 = boost
                5.3529506 = idf(docFreq=539, maxDocs=41962)
                0.017598514 = queryNorm
              0.28973696 = fieldWeight in 636, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.3529506 = idf(docFreq=539, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.025907068 = weight(abstract_txt:insbesondere in 636) [ClassicSimilarity], result of:
            0.025907068 = score(doc=636,freq=1.0), product of:
              0.14742184 = queryWeight, product of:
                1.4896334 = boost
                5.6234965 = idf(docFreq=411, maxDocs=41962)
                0.017598514 = queryNorm
              0.17573427 = fieldWeight in 636, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6234965 = idf(docFreq=411, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.09380973 = weight(abstract_txt:funktionsweise in 636) [ClassicSimilarity], result of:
            0.09380973 = score(doc=636,freq=2.0), product of:
              0.2759126 = queryWeight, product of:
                2.0379066 = boost
                7.693276 = idf(docFreq=51, maxDocs=41962)
                0.017598514 = queryNorm
              0.33999798 = fieldWeight in 636, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.693276 = idf(docFreq=51, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.04011402 = weight(abstract_txt:wird in 636) [ClassicSimilarity], result of:
            0.04011402 = score(doc=636,freq=4.0), product of:
              0.1686969 = queryWeight, product of:
                2.5195446 = boost
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.017598514 = queryNorm
              0.23778753 = fieldWeight in 636, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.050202776 = weight(abstract_txt:wissenschaftlichen in 636) [ClassicSimilarity], result of:
            0.050202776 = score(doc=636,freq=1.0), product of:
              0.28869867 = queryWeight, product of:
                2.948057 = boost
                5.5645866 = idf(docFreq=436, maxDocs=41962)
                0.017598514 = queryNorm
              0.17389333 = fieldWeight in 636, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5645866 = idf(docFreq=436, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
          0.41382477 = weight(abstract_txt:suchmaschinen in 636) [ClassicSimilarity], result of:
            0.41382477 = score(doc=636,freq=16.0), product of:
              0.5633911 = queryWeight, product of:
                5.448005 = boost
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.017598514 = queryNorm
              0.73452485 = fieldWeight in 636, product of:
                4.0 = tf(freq=16.0), with freq of:
                  16.0 = termFreq=16.0
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.03125 = fieldNorm(doc=636)
        0.48 = coord(12/25)
    
  4. Söllner, K.: Google Scholar und Windows Live Academic Search - aktuelle Entwicklungen bei wissenschaftlichen Suchmaschinen (2006) 0.34
    0.33933315 = sum of:
      0.33933315 = product of:
        0.8483328 = sum of:
          0.02754082 = weight(abstract_txt:auch in 182) [ClassicSimilarity], result of:
            0.02754082 = score(doc=182,freq=4.0), product of:
              0.06661247 = queryWeight, product of:
                1.0013278 = boost
                3.7800999 = idf(docFreq=2602, maxDocs=41962)
                0.017598514 = queryNorm
              0.41344842 = fieldWeight in 182, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.7800999 = idf(docFreq=2602, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.02159458 = weight(abstract_txt:einer in 182) [ClassicSimilarity], result of:
            0.02159458 = score(doc=182,freq=2.0), product of:
              0.07136372 = queryWeight, product of:
                1.0364234 = boost
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.017598514 = queryNorm
              0.30259886 = fieldWeight in 182, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.027244674 = weight(abstract_txt:sind in 182) [ClassicSimilarity], result of:
            0.027244674 = score(doc=182,freq=3.0), product of:
              0.07278998 = queryWeight, product of:
                1.0467291 = boost
                3.951494 = idf(docFreq=2192, maxDocs=41962)
                0.017598514 = queryNorm
              0.37429154 = fieldWeight in 182, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.951494 = idf(docFreq=2192, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.021945674 = weight(abstract_txt:dieser in 182) [ClassicSimilarity], result of:
            0.021945674 = score(doc=182,freq=1.0), product of:
              0.09088458 = queryWeight, product of:
                1.1696168 = boost
                4.4154058 = idf(docFreq=1378, maxDocs=41962)
                0.017598514 = queryNorm
              0.2414675 = fieldWeight in 182, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.4154058 = idf(docFreq=1378, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.028002819 = weight(abstract_txt:diesem in 182) [ClassicSimilarity], result of:
            0.028002819 = score(doc=182,freq=1.0), product of:
              0.10691996 = queryWeight, product of:
                1.2686093 = boost
                4.789111 = idf(docFreq=948, maxDocs=41962)
                0.017598514 = queryNorm
              0.2619045 = fieldWeight in 182, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.789111 = idf(docFreq=948, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.045337368 = weight(abstract_txt:insbesondere in 182) [ClassicSimilarity], result of:
            0.045337368 = score(doc=182,freq=1.0), product of:
              0.14742184 = queryWeight, product of:
                1.4896334 = boost
                5.6234965 = idf(docFreq=411, maxDocs=41962)
                0.017598514 = queryNorm
              0.30753496 = fieldWeight in 182, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6234965 = idf(docFreq=411, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.035099767 = weight(abstract_txt:wird in 182) [ClassicSimilarity], result of:
            0.035099767 = score(doc=182,freq=1.0), product of:
              0.1686969 = queryWeight, product of:
                2.5195446 = boost
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.017598514 = queryNorm
              0.2080641 = fieldWeight in 182, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.124245524 = weight(abstract_txt:wissenschaftlichen in 182) [ClassicSimilarity], result of:
            0.124245524 = score(doc=182,freq=2.0), product of:
              0.28869867 = queryWeight, product of:
                2.948057 = boost
                5.5645866 = idf(docFreq=436, maxDocs=41962)
                0.017598514 = queryNorm
              0.43036404 = fieldWeight in 182, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.5645866 = idf(docFreq=436, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.11248525 = weight(abstract_txt:wissenschaftliche in 182) [ClassicSimilarity], result of:
            0.11248525 = score(doc=182,freq=1.0), product of:
              0.3404066 = queryWeight, product of:
                3.2011976 = boost
                6.042401 = idf(docFreq=270, maxDocs=41962)
                0.017598514 = queryNorm
              0.3304438 = fieldWeight in 182, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.042401 = idf(docFreq=270, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
          0.40483636 = weight(abstract_txt:suchmaschinen in 182) [ClassicSimilarity], result of:
            0.40483636 = score(doc=182,freq=5.0), product of:
              0.5633911 = queryWeight, product of:
                5.448005 = boost
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.017598514 = queryNorm
              0.71857077 = fieldWeight in 182, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.0546875 = fieldNorm(doc=182)
        0.4 = coord(10/25)
    
  5. Hastik, C.; Schuster, A.; Knauerhase, A.: Wissenschaftliche Suchmaschinen : Usability Evaluation und Betrachtung des Suchverhaltens potentieller Nutzer (2009) 0.33
    0.325437 = sum of:
      0.325437 = product of:
        1.1622751 = sum of:
          0.026176585 = weight(abstract_txt:einer in 4769) [ClassicSimilarity], result of:
            0.026176585 = score(doc=4769,freq=1.0), product of:
              0.07136372 = queryWeight, product of:
                1.0364234 = boost
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.017598514 = queryNorm
              0.36680523 = fieldWeight in 4769, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.912589 = idf(docFreq=2279, maxDocs=41962)
                0.09375 = fieldNorm(doc=4769)
          0.048004836 = weight(abstract_txt:diesem in 4769) [ClassicSimilarity], result of:
            0.048004836 = score(doc=4769,freq=1.0), product of:
              0.10691996 = queryWeight, product of:
                1.2686093 = boost
                4.789111 = idf(docFreq=948, maxDocs=41962)
                0.017598514 = queryNorm
              0.44897917 = fieldWeight in 4769, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.789111 = idf(docFreq=948, maxDocs=41962)
                0.09375 = fieldNorm(doc=4769)
          0.06703473 = weight(abstract_txt:welche in 4769) [ClassicSimilarity], result of:
            0.06703473 = score(doc=4769,freq=1.0), product of:
              0.13357814 = queryWeight, product of:
                1.4179672 = boost
                5.3529506 = idf(docFreq=539, maxDocs=41962)
                0.017598514 = queryNorm
              0.5018391 = fieldWeight in 4769, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.3529506 = idf(docFreq=539, maxDocs=41962)
                0.09375 = fieldNorm(doc=4769)
          0.060171027 = weight(abstract_txt:wird in 4769) [ClassicSimilarity], result of:
            0.060171027 = score(doc=4769,freq=1.0), product of:
              0.1686969 = queryWeight, product of:
                2.5195446 = boost
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.017598514 = queryNorm
              0.3566813 = fieldWeight in 4769, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.8046005 = idf(docFreq=2539, maxDocs=41962)
                0.09375 = fieldNorm(doc=4769)
          0.15060832 = weight(abstract_txt:wissenschaftlichen in 4769) [ClassicSimilarity], result of:
            0.15060832 = score(doc=4769,freq=1.0), product of:
              0.28869867 = queryWeight, product of:
                2.948057 = boost
                5.5645866 = idf(docFreq=436, maxDocs=41962)
                0.017598514 = queryNorm
              0.52168 = fieldWeight in 4769, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5645866 = idf(docFreq=436, maxDocs=41962)
                0.09375 = fieldNorm(doc=4769)
          0.2727054 = weight(abstract_txt:wissenschaftliche in 4769) [ClassicSimilarity], result of:
            0.2727054 = score(doc=4769,freq=2.0), product of:
              0.3404066 = queryWeight, product of:
                3.2011976 = boost
                6.042401 = idf(docFreq=270, maxDocs=41962)
                0.017598514 = queryNorm
              0.8011167 = fieldWeight in 4769, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.042401 = idf(docFreq=270, maxDocs=41962)
                0.09375 = fieldNorm(doc=4769)
          0.5375741 = weight(abstract_txt:suchmaschinen in 4769) [ClassicSimilarity], result of:
            0.5375741 = score(doc=4769,freq=3.0), product of:
              0.5633911 = queryWeight, product of:
                5.448005 = boost
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.017598514 = queryNorm
              0.9541757 = fieldWeight in 4769, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.876199 = idf(docFreq=319, maxDocs=41962)
                0.09375 = fieldNorm(doc=4769)
        0.28 = coord(7/25)