Document (#35024)

Author

Mayr, P.

Title

Google Scholar als akademische Suchmaschine

Source

Mitteilungen der Vereinigung Österreichischer Bibliothekarinnen und Bibliothekare. 62(2009) H.2, S.19-28

Year

2009

Abstract

Neben den klassischen Informationsanbietern Bibliothek, Fachinformation und den Verlagen sind Internetsuchmaschinen inzwischen fester Bestandteil bei der Recherche nach wissenschaftlicher Information. Scirus (Elsevier, 2004) und Google Scholar sind zwei Beispiele für Suchdienste kommerzieller Suchmaschinen-Unternehmen, die eine Einschränkung auf den wissenschaftlichen Dokumentenraum anstreben und nennenswerte Dokumentzahlen in allen Disziplinen generieren. Der Vergleich der Treffermengen für beliebige Suchthemen zeigt, dass die Wahl des Suchsystems, des Dokumentenpools und der Dokumenttypen entscheidenden Einfluss auf die Relevanz und damit letztlich auch die Akzeptanz des Suchergebnisses hat. Tabelle 1 verdeutlicht die Mengenunterschiede am Beispiel der Trefferergebnisse für die Suchbegriffe "search engines" bzw. "Suchmaschinen" in der allgemeinen Internetsuchmaschine Google, der wissenschaftlichen Suchmaschine Google Scholar (GS) und der größten fachübergreifenden bibliographischen Literaturdatenbank Web of Science (WoS). Der Anteil der Dokumente, die in diesem Fall eindeutig der Wissenschaft zuzuordnen sind (siehe GS und insbesondere WoS in Tabelle 1), liegt gegenüber der allgemeinen Websuche lediglich im Promille-Bereich. Dieses Beispiel veranschaulicht, dass es ausgesprochen problematisch sein kann, fachwissenschaftliche Fragestellungen ausschließlich mit Internetsuchmaschinen zu recherchieren. Der Anteil der fachwissenschaftlich relevanten Dokumente in diesem Trefferpool ist i. d. R. sehr gering. Damit sinkt die Wahrscheinlichkeit, wissenschaftlich relevantes (z. B. einen Zeitschriftenaufsatz) auf den ersten Trefferseiten zu finden, deutlich ab.
Die drei oben genannten Suchsysteme (Google, GS und WoS) unterscheiden sich in mehrerlei Hinsicht fundamental und eignen sich daher gut, um in die Grundthematik dieses Artikels einzuleiten. Die obigen Suchsysteme erschließen zunächst unterschiedliche Suchräume, und dies auf sehr spezifische Weise. Während Google frei zugängliche und über Hyperlink adressierbare Dokumente im Internet erfasst, gehen die beiden akademischen Suchsysteme deutlich selektiver bei der Inhaltserschließung vor. Google Scholar erfasst neben frei zugänglichen elektronischen Publikationstypen im Internet hauptsächlich wissenschaftliche Dokumente, die direkt von den akademischen Verlagen bezogen werden. Das WoS, das auf den unterschiedlichen bibliographischen Datenbanken und Zitationsindizes des ehemaligen "Institute for Scientific Information" (ISI) basiert, selektiert gegenüber den rein automatischen brute-force-Ansätzen der Internetsuchmaschine über einen qualitativen Ansatz. In den Datenbanken des WoS werden ausschließlich internationale Fachzeitschriften erfasst, die ein kontrolliertes Peer-Review durchlaufen. Insgesamt werden ca. 12.000 Zeitschriften ausgewertet und über die Datenbank verfügbar gemacht. Wie bereits erwähnt, spielt neben der Abgrenzung der Suchräume und Dokumenttypen die Zugänglichkeit und Relevanz der Dokumente eine entscheidende Bedeutung für den Benutzer. Die neueren technologischen Entwicklungen des Web Information Retrieval (IR), wie sie Google oder GS implementieren, werten insbesondere frei zugängliche Dokumente mit ihrer gesamten Text- und Linkinformation automatisch aus. Diese Verfahren sind vor allem deshalb erfolgreich, weil sie Ergebnislisten nach Relevanz gerankt darstellen, einfach und schnell zu recherchieren sind und direkt auf die Volltexte verweisen. Die qualitativen Verfahren der traditionellen Informationsanbieter (z. B. WoS) hingegen zeigen genau bei diesen Punkten (Ranking, Einfachheit und Volltextzugriff) Schwächen, überzeugen aber vor allem durch ihre Stringenz, in diesem Fall die selektive Aufnahme von qualitätsgeprüften Dokumenten in das System und die inhaltliche Erschließung der Dokumente (siehe dazu Mayr und Petras, 2008).

Theme

Suchmaschinen

Object

Google Scholar

Similar documents (author)

1. Mayr, P.: DigiLink - Die dritte Generation der Linklisten (2005) 5.02

   5.023691 = sum of:
     5.023691 = weight(author_txt:mayr in 4582) [ClassicSimilarity], result of:
       5.023691 = fieldWeight in 4582, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.037906 = idf(docFreq=38, maxDocs=44421)
         0.625 = fieldNorm(doc=4582)
   

2. Mayr, P.: Thesauri, Klassifikationen & Co - die Renaissance der kontrollierten Vokabulare? (2006) 5.02

   5.023691 = sum of:
     5.023691 = weight(author_txt:mayr in 153) [ClassicSimilarity], result of:
       5.023691 = fieldWeight in 153, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.037906 = idf(docFreq=38, maxDocs=44421)
         0.625 = fieldNorm(doc=153)
   

3. Mayr, P.: Informationsangebote für das Wissenschaftsportal vascoda : eine Bestandsaufnahme (2006) 5.02

   5.023691 = sum of:
     5.023691 = weight(author_txt:mayr in 1154) [ClassicSimilarity], result of:
       5.023691 = fieldWeight in 1154, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.037906 = idf(docFreq=38, maxDocs=44421)
         0.625 = fieldNorm(doc=1154)
   

4. Mayr, P.: ¬Die virtuelle Steinsuppe : kooperatives Verwalten von elektronischen Ressourcen mit Digilink (2007) 5.02

   5.023691 = sum of:
     5.023691 = weight(author_txt:mayr in 1567) [ClassicSimilarity], result of:
       5.023691 = fieldWeight in 1567, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.037906 = idf(docFreq=38, maxDocs=44421)
         0.625 = fieldNorm(doc=1567)
   

5. Mayr, P.: Bradfordizing als Re-Ranking-Ansatz in Literaturinformationssystemen (2011) 5.02

   5.023691 = sum of:
     5.023691 = weight(author_txt:mayr in 292) [ClassicSimilarity], result of:
       5.023691 = fieldWeight in 292, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.037906 = idf(docFreq=38, maxDocs=44421)
         0.625 = fieldNorm(doc=292)
   

Similar documents (content)

1. Mayr, P.; Walter, A.-K.: Abdeckung und Aktualität des Suchdienstes Google Scholar (2006) 0.18

   0.17967403 = sum of:
     0.17967403 = product of:
       0.89837015 = sum of:
         0.07880674 = weight(abstract_txt:ausschließlich in 131) [ClassicSimilarity], result of:
           0.07880674 = score(doc=131,freq=1.0), product of:
             0.13985164 = queryWeight, product of:
               1.1119703 = boost
               7.212831 = idf(docFreq=88, maxDocs=44421)
               0.017436875 = queryNorm
             0.56350243 = fieldWeight in 131, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.212831 = idf(docFreq=88, maxDocs=44421)
               0.078125 = fieldNorm(doc=131)
         0.044680085 = weight(abstract_txt:sind in 131) [ClassicSimilarity], result of:
           0.044680085 = score(doc=131,freq=2.0), product of:
             0.10319802 = queryWeight, product of:
               1.5103065 = boost
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.017436875 = queryNorm
             0.43295488 = fieldWeight in 131, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.078125 = fieldNorm(doc=131)
         0.27764487 = weight(abstract_txt:scholar in 131) [ClassicSimilarity], result of:
           0.27764487 = score(doc=131,freq=4.0), product of:
             0.25700513 = queryWeight, product of:
               2.1317942 = boost
               6.9139757 = idf(docFreq=119, maxDocs=44421)
               0.017436875 = queryNorm
             1.0803087 = fieldWeight in 131, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.9139757 = idf(docFreq=119, maxDocs=44421)
               0.078125 = fieldNorm(doc=131)
         0.31737626 = weight(abstract_txt:google in 131) [ClassicSimilarity], result of:
           0.31737626 = score(doc=131,freq=6.0), product of:
             0.30925107 = queryWeight, product of:
               3.3070822 = boost
               5.3628736 = idf(docFreq=565, maxDocs=44421)
               0.017436875 = queryNorm
             1.0262737 = fieldWeight in 131, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.3628736 = idf(docFreq=565, maxDocs=44421)
               0.078125 = fieldNorm(doc=131)
         0.17986222 = weight(abstract_txt:dokumente in 131) [ClassicSimilarity], result of:
           0.17986222 = score(doc=131,freq=1.0), product of:
             0.36807925 = queryWeight, product of:
               3.3749247 = boost
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.017436875 = queryNorm
             0.4886508 = fieldWeight in 131, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.078125 = fieldNorm(doc=131)
       0.2 = coord(5/25)
   

2. Wolf, S.: Neuer Meilenstein für BASE : 90 Millionen Dokumente (2016) 0.18

   0.17731898 = sum of:
     0.17731898 = product of:
       0.7388291 = sum of:
         0.09068265 = weight(abstract_txt:anteil in 3872) [ClassicSimilarity], result of:
           0.09068265 = score(doc=3872,freq=1.0), product of:
             0.15357062 = queryWeight, product of:
               1.1652348 = boost
               7.558333 = idf(docFreq=62, maxDocs=44421)
               0.017436875 = queryNorm
             0.59049475 = fieldWeight in 3872, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.558333 = idf(docFreq=62, maxDocs=44421)
               0.078125 = fieldNorm(doc=3872)
         0.031593595 = weight(abstract_txt:sind in 3872) [ClassicSimilarity], result of:
           0.031593595 = score(doc=3872,freq=1.0), product of:
             0.10319802 = queryWeight, product of:
               1.5103065 = boost
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.017436875 = queryNorm
             0.30614534 = fieldWeight in 3872, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.078125 = fieldNorm(doc=3872)
         0.09379853 = weight(abstract_txt:frei in 3872) [ClassicSimilarity], result of:
           0.09379853 = score(doc=3872,freq=1.0), product of:
             0.17979866 = queryWeight, product of:
               1.5441812 = boost
               6.677587 = idf(docFreq=151, maxDocs=44421)
               0.017436875 = queryNorm
             0.5216865 = fieldWeight in 3872, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.677587 = idf(docFreq=151, maxDocs=44421)
               0.078125 = fieldNorm(doc=3872)
         0.13882244 = weight(abstract_txt:scholar in 3872) [ClassicSimilarity], result of:
           0.13882244 = score(doc=3872,freq=1.0), product of:
             0.25700513 = queryWeight, product of:
               2.1317942 = boost
               6.9139757 = idf(docFreq=119, maxDocs=44421)
               0.017436875 = queryNorm
             0.54015434 = fieldWeight in 3872, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.9139757 = idf(docFreq=119, maxDocs=44421)
               0.078125 = fieldNorm(doc=3872)
         0.12956831 = weight(abstract_txt:google in 3872) [ClassicSimilarity], result of:
           0.12956831 = score(doc=3872,freq=1.0), product of:
             0.30925107 = queryWeight, product of:
               3.3070822 = boost
               5.3628736 = idf(docFreq=565, maxDocs=44421)
               0.017436875 = queryNorm
             0.4189745 = fieldWeight in 3872, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3628736 = idf(docFreq=565, maxDocs=44421)
               0.078125 = fieldNorm(doc=3872)
         0.25436357 = weight(abstract_txt:dokumente in 3872) [ClassicSimilarity], result of:
           0.25436357 = score(doc=3872,freq=2.0), product of:
             0.36807925 = queryWeight, product of:
               3.3749247 = boost
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.017436875 = queryNorm
             0.69105655 = fieldWeight in 3872, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.078125 = fieldNorm(doc=3872)
       0.24 = coord(6/25)
   

3. Kostädt, P.: Innovative Recherchemöglichkeiten in Katalogen und Bibliotheksportalen (2008) 0.16

   0.16309543 = sum of:
     0.16309543 = product of:
       0.58248365 = sum of:
         0.05516472 = weight(abstract_txt:ausschließlich in 3295) [ClassicSimilarity], result of:
           0.05516472 = score(doc=3295,freq=1.0), product of:
             0.13985164 = queryWeight, product of:
               1.1119703 = boost
               7.212831 = idf(docFreq=88, maxDocs=44421)
               0.017436875 = queryNorm
             0.3944517 = fieldWeight in 3295, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.212831 = idf(docFreq=88, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3295)
         0.084066086 = weight(abstract_txt:zugängliche in 3295) [ClassicSimilarity], result of:
           0.084066086 = score(doc=3295,freq=1.0), product of:
             0.18519981 = queryWeight, product of:
               1.279616 = boost
               8.30027 = idf(docFreq=29, maxDocs=44421)
               0.017436875 = queryNorm
             0.45392102 = fieldWeight in 3295, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.30027 = idf(docFreq=29, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3295)
         0.022115516 = weight(abstract_txt:sind in 3295) [ClassicSimilarity], result of:
           0.022115516 = score(doc=3295,freq=1.0), product of:
             0.10319802 = queryWeight, product of:
               1.5103065 = boost
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.017436875 = queryNorm
             0.21430174 = fieldWeight in 3295, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3295)
         0.06565897 = weight(abstract_txt:frei in 3295) [ClassicSimilarity], result of:
           0.06565897 = score(doc=3295,freq=1.0), product of:
             0.17979866 = queryWeight, product of:
               1.5441812 = boost
               6.677587 = idf(docFreq=151, maxDocs=44421)
               0.017436875 = queryNorm
             0.36518055 = fieldWeight in 3295, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.677587 = idf(docFreq=151, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3295)
         0.07341459 = weight(abstract_txt:relevanz in 3295) [ClassicSimilarity], result of:
           0.07341459 = score(doc=3295,freq=1.0), product of:
             0.19369213 = queryWeight, product of:
               1.6027324 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.017436875 = queryNorm
             0.3790272 = fieldWeight in 3295, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3295)
         0.15379772 = weight(abstract_txt:suchsysteme in 3295) [ClassicSimilarity], result of:
           0.15379772 = score(doc=3295,freq=1.0), product of:
             0.31712002 = queryWeight, product of:
               2.0507696 = boost
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.017436875 = queryNorm
             0.48498267 = fieldWeight in 3295, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3295)
         0.12826608 = weight(abstract_txt:google in 3295) [ClassicSimilarity], result of:
           0.12826608 = score(doc=3295,freq=2.0), product of:
             0.30925107 = queryWeight, product of:
               3.3070822 = boost
               5.3628736 = idf(docFreq=565, maxDocs=44421)
               0.017436875 = queryNorm
             0.4147636 = fieldWeight in 3295, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.3628736 = idf(docFreq=565, maxDocs=44421)
               0.0546875 = fieldNorm(doc=3295)
       0.28 = coord(7/25)
   

4. Müller, S.: Schattenbibliotheken : Welche Auswirkungen haben Sci-Hub und Co. auf Verlage und Bibliotheken? (2019) 0.15

   0.14711086 = sum of:
     0.14711086 = product of:
       0.61296195 = sum of:
         0.07989609 = weight(abstract_txt:direkt in 890) [ClassicSimilarity], result of:
           0.07989609 = score(doc=890,freq=1.0), product of:
             0.12498413 = queryWeight, product of:
               1.0512036 = boost
               6.8186655 = idf(docFreq=131, maxDocs=44421)
               0.017436875 = queryNorm
             0.6392499 = fieldWeight in 890, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.8186655 = idf(docFreq=131, maxDocs=44421)
               0.09375 = fieldNorm(doc=890)
         0.04065318 = weight(abstract_txt:diesem in 890) [ClassicSimilarity], result of:
           0.04065318 = score(doc=890,freq=1.0), product of:
             0.09118666 = queryWeight, product of:
               1.099691 = boost
               4.7554536 = idf(docFreq=1038, maxDocs=44421)
               0.017436875 = queryNorm
             0.4458238 = fieldWeight in 890, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7554536 = idf(docFreq=1038, maxDocs=44421)
               0.09375 = fieldNorm(doc=890)
         0.11021853 = weight(abstract_txt:verlagen in 890) [ClassicSimilarity], result of:
           0.11021853 = score(doc=890,freq=1.0), product of:
             0.15488437 = queryWeight, product of:
               1.1702083 = boost
               7.590594 = idf(docFreq=60, maxDocs=44421)
               0.017436875 = queryNorm
             0.7116182 = fieldWeight in 890, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.590594 = idf(docFreq=60, maxDocs=44421)
               0.09375 = fieldNorm(doc=890)
         0.12844716 = weight(abstract_txt:akademischen in 890) [ClassicSimilarity], result of:
           0.12844716 = score(doc=890,freq=1.0), product of:
             0.17152241 = queryWeight, product of:
               1.2314587 = boost
               7.9878955 = idf(docFreq=40, maxDocs=44421)
               0.017436875 = queryNorm
             0.7488652 = fieldWeight in 890, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.9878955 = idf(docFreq=40, maxDocs=44421)
               0.09375 = fieldNorm(doc=890)
         0.037912313 = weight(abstract_txt:sind in 890) [ClassicSimilarity], result of:
           0.037912313 = score(doc=890,freq=1.0), product of:
             0.10319802 = queryWeight, product of:
               1.5103065 = boost
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.017436875 = queryNorm
             0.36737442 = fieldWeight in 890, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.09375 = fieldNorm(doc=890)
         0.21583466 = weight(abstract_txt:dokumente in 890) [ClassicSimilarity], result of:
           0.21583466 = score(doc=890,freq=1.0), product of:
             0.36807925 = queryWeight, product of:
               3.3749247 = boost
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.017436875 = queryNorm
             0.58638096 = fieldWeight in 890, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.09375 = fieldNorm(doc=890)
       0.24 = coord(6/25)
   

5. Blittkowsky, R.: ¬Das World Wide Web gleicht einer Fliege : Studien versuchen zu erklären, warum Suchmaschinen nicht immer fündig werden (2001) 0.13

   0.12723146 = sum of:
     0.12723146 = product of:
       0.45439807 = sum of:
         0.037476663 = weight(abstract_txt:recherchieren in 2090) [ClassicSimilarity], result of:
           0.037476663 = score(doc=2090,freq=1.0), product of:
             0.15694927 = queryWeight, product of:
               1.177983 = boost
               7.6410246 = idf(docFreq=57, maxDocs=44421)
               0.017436875 = queryNorm
             0.23878202 = fieldWeight in 2090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.6410246 = idf(docFreq=57, maxDocs=44421)
               0.03125 = fieldNorm(doc=2090)
         0.030955274 = weight(abstract_txt:sind in 2090) [ClassicSimilarity], result of:
           0.030955274 = score(doc=2090,freq=6.0), product of:
             0.10319802 = queryWeight, product of:
               1.5103065 = boost
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.017436875 = queryNorm
             0.29995996 = fieldWeight in 2090, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.9186604 = idf(docFreq=2398, maxDocs=44421)
               0.03125 = fieldNorm(doc=2090)
         0.04195119 = weight(abstract_txt:relevanz in 2090) [ClassicSimilarity], result of:
           0.04195119 = score(doc=2090,freq=1.0), product of:
             0.19369213 = queryWeight, product of:
               1.6027324 = boost
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.017436875 = queryNorm
             0.21658696 = fieldWeight in 2090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.930783 = idf(docFreq=117, maxDocs=44421)
               0.03125 = fieldNorm(doc=2090)
         0.050730456 = weight(abstract_txt:erfasst in 2090) [ClassicSimilarity], result of:
           0.050730456 = score(doc=2090,freq=1.0), product of:
             0.21985091 = queryWeight, product of:
               1.7075332 = boost
               7.3839793 = idf(docFreq=74, maxDocs=44421)
               0.017436875 = queryNorm
             0.23074935 = fieldWeight in 2090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3839793 = idf(docFreq=74, maxDocs=44421)
               0.03125 = fieldNorm(doc=2090)
         0.08788441 = weight(abstract_txt:suchsysteme in 2090) [ClassicSimilarity], result of:
           0.08788441 = score(doc=2090,freq=1.0), product of:
             0.31712002 = queryWeight, product of:
               2.0507696 = boost
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.017436875 = queryNorm
             0.27713296 = fieldWeight in 2090, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.868255 = idf(docFreq=16, maxDocs=44421)
               0.03125 = fieldNorm(doc=2090)
         0.103654645 = weight(abstract_txt:google in 2090) [ClassicSimilarity], result of:
           0.103654645 = score(doc=2090,freq=4.0), product of:
             0.30925107 = queryWeight, product of:
               3.3070822 = boost
               5.3628736 = idf(docFreq=565, maxDocs=44421)
               0.017436875 = queryNorm
             0.3351796 = fieldWeight in 2090, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.3628736 = idf(docFreq=565, maxDocs=44421)
               0.03125 = fieldNorm(doc=2090)
         0.10174543 = weight(abstract_txt:dokumente in 2090) [ClassicSimilarity], result of:
           0.10174543 = score(doc=2090,freq=2.0), product of:
             0.36807925 = queryWeight, product of:
               3.3749247 = boost
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.017436875 = queryNorm
             0.27642262 = fieldWeight in 2090, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.03125 = fieldNorm(doc=2090)
       0.28 = coord(7/25)