Document (#23281)

Author
Umstätter, W.
Rehm, M.
Dorogi, Z.
Title
¬Die Halbwertszeit in der naturwissenschaftlichen Literatur
Source
Nachrichten für Dokumentation. 33(1982) H.2, S.50-52
Year
1982
Abstract
Aus der Benutzung der Universitätsbibliothek Ulm wurde eine Halbwertszeit-Funktion in der naturwissenschaftlichen Literatur von t1/2=5 Jahren bestimmt. Eine interessante Abweichung von dieser Halbwertszeit-Funktion ist bei der Bestellung der neuesten Zeitschriften zu beobachten. Der Grund hierfür liegt vermutlich darin, daß Wissenschaftler das Vierfache an neuester Literatur lesen müssen, um wissenschaftliche Trends zu überschauen. Eine weitere Abweichung ist in der ältesten Literatur festzustellen, bei den sog. 'citation classics'. Übereinstimmung zeigt sich im Zitier- und Kopierverhalten bei Zeitschriftenliteratur, die älter als 2 Jahre ist. Etwa 27% der an die UB Ulm gerichteten Literaturanforderungen betreffen Zeitschriftenaufsätze mit einem Alter von über 10 Jahren, da diese Bestände für die Benutzer nur schwer zugänglich sind. Dies zeigt die große Bedeutung einer Freihand-Bibliothek
Footnote
Vgl. auch: Artus, H.M.: 'Halbwertzeit wissenschaftlicher Literatur' - Naturgesetz oder Forschungsartefakt? Zum Forschungsstand der Referenz- und Zitationsanalyse
Theme
Informetrie

Similar documents (author)

  1. Umstätter, W.; Rehm, M.: Einführung in die Literaturdokumentation und Informationsvermittlung : Medizin - Biologie, Chemie - Physik (1981) 6.25 
    6.252779 = sum of:
  6.252779 = sum of:
    2.237465 = weight(author_txt:umstätter in 1329) [ClassicSimilarity], result of:
      2.237465 = score(doc=1329,freq=1.0), product of:
        0.56070083 = queryWeight, product of:
          7.980958 = idf(docFreq=38, maxDocs=41962)
          0.070254825 = queryNorm
        3.990479 = fieldWeight in 1329, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.980958 = idf(docFreq=38, maxDocs=41962)
          0.5 = fieldNorm(doc=1329)
    4.015314 = weight(author_txt:rehm in 1329) [ClassicSimilarity], result of:
      4.015314 = score(doc=1329,freq=1.0), product of:
        0.8280185 = queryWeight, product of:
          1.2152187 = boost
          9.698609 = idf(docFreq=6, maxDocs=41962)
          0.070254825 = queryNorm
        4.8493047 = fieldWeight in 1329, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          9.698609 = idf(docFreq=6, maxDocs=41962)
          0.5 = fieldNorm(doc=1329)
  2. Nunnink, U.; Rehm, M.: Sacherschließung und Aufstellung des bibliographischen Apparates : das System der Universitätsbibliothek Ulm (1981) 2.01 
    2.007657 = sum of:
  2.007657 = product of:
    4.015314 = sum of:
      4.015314 = weight(author_txt:rehm in 7338) [ClassicSimilarity], result of:
        4.015314 = score(doc=7338,freq=1.0), product of:
          0.8280185 = queryWeight, product of:
            1.2152187 = boost
            9.698609 = idf(docFreq=6, maxDocs=41962)
            0.070254825 = queryNorm
          4.8493047 = fieldWeight in 7338, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.698609 = idf(docFreq=6, maxDocs=41962)
            0.5 = fieldNorm(doc=7338)
    0.5 = coord(1/2)
  3. Strauch, D.; Rehm, M.: Lexikon Buch, Bibliothek, neue Medien (2007) 2.01 
    2.007657 = sum of:
  2.007657 = product of:
    4.015314 = sum of:
      4.015314 = weight(author_txt:rehm in 3835) [ClassicSimilarity], result of:
        4.015314 = score(doc=3835,freq=1.0), product of:
          0.8280185 = queryWeight, product of:
            1.2152187 = boost
            9.698609 = idf(docFreq=6, maxDocs=41962)
            0.070254825 = queryNorm
          4.8493047 = fieldWeight in 3835, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.698609 = idf(docFreq=6, maxDocs=41962)
            0.5 = fieldNorm(doc=3835)
    0.5 = coord(1/2)
  4. Neudecker, C.; Rehm, G,: Digitale Kuratierungstechnologien für Bibliotheken (2016) 2.01 
    2.007657 = sum of:
  2.007657 = product of:
    4.015314 = sum of:
      4.015314 = weight(author_txt:rehm in 209) [ClassicSimilarity], result of:
        4.015314 = score(doc=209,freq=1.0), product of:
          0.8280185 = queryWeight, product of:
            1.2152187 = boost
            9.698609 = idf(docFreq=6, maxDocs=41962)
            0.070254825 = queryNorm
          4.8493047 = fieldWeight in 209, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.698609 = idf(docFreq=6, maxDocs=41962)
            0.5 = fieldNorm(doc=209)
    0.5 = coord(1/2)
  5. Umstätter, W.: Was verändert die Informationstechnologie in den Universitätsbibliotheken? (1989) 1.40 
    1.3984156 = sum of:
  1.3984156 = product of:
    2.7968311 = sum of:
      2.7968311 = weight(author_txt:umstätter in 878) [ClassicSimilarity], result of:
        2.7968311 = score(doc=878,freq=1.0), product of:
          0.56070083 = queryWeight, product of:
            7.980958 = idf(docFreq=38, maxDocs=41962)
            0.070254825 = queryNorm
          4.9880986 = fieldWeight in 878, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.980958 = idf(docFreq=38, maxDocs=41962)
            0.625 = fieldNorm(doc=878)
    0.5 = coord(1/2)

Similar documents (content)

  1. Leonhardt, H.A.: Systematik "Ästhetische Kulturwissenschaft" an der Universitätsbibliothek Hildesheim : ein Innovationsbericht (2018) 0.11 
    0.10947181 = sum of:
  0.10947181 = product of:
    0.68419886 = sum of:
      0.10719054 = weight(abstract_txt:benutzung in 1055) [ClassicSimilarity], result of:
        0.10719054 = score(doc=1055,freq=1.0), product of:
          0.11455596 = queryWeight, product of:
            1.0307255 = boost
            7.4856367 = idf(docFreq=63, maxDocs=41962)
            0.014847248 = queryNorm
          0.9357046 = fieldWeight in 1055, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.4856367 = idf(docFreq=63, maxDocs=41962)
            0.125 = fieldNorm(doc=1055)
      0.23313026 = weight(abstract_txt:freihand in 1055) [ClassicSimilarity], result of:
        0.23313026 = score(doc=1055,freq=1.0), product of:
          0.19229995 = queryWeight, product of:
            1.335438 = boost
            9.698609 = idf(docFreq=6, maxDocs=41962)
            0.014847248 = queryNorm
          1.2123262 = fieldWeight in 1055, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.698609 = idf(docFreq=6, maxDocs=41962)
            0.125 = fieldNorm(doc=1055)
      0.033960797 = weight(abstract_txt:eine in 1055) [ClassicSimilarity], result of:
        0.033960797 = score(doc=1055,freq=1.0), product of:
          0.07678429 = queryWeight, product of:
            1.4616082 = boost
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.014847248 = queryNorm
          0.44228834 = fieldWeight in 1055, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.125 = fieldNorm(doc=1055)
      0.30991727 = weight(abstract_txt:literatur in 1055) [ClassicSimilarity], result of:
        0.30991727 = score(doc=1055,freq=2.0), product of:
          0.2929233 = queryWeight, product of:
            3.2964091 = boost
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.014847248 = queryNorm
          1.0580151 = fieldWeight in 1055, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.125 = fieldNorm(doc=1055)
    0.16 = coord(4/25)
  2. Gaus, W.: Information und Dokumentation in der Medizin (2004) 0.09 
    0.087744266 = sum of:
  0.087744266 = product of:
    0.43872133 = sum of:
      0.06559018 = weight(abstract_txt:vermutlich in 3953) [ClassicSimilarity], result of:
        0.06559018 = score(doc=3953,freq=1.0), product of:
          0.13106677 = queryWeight, product of:
            1.1025047 = boost
            8.006933 = idf(docFreq=37, maxDocs=41962)
            0.014847248 = queryNorm
          0.5004333 = fieldWeight in 3953, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.006933 = idf(docFreq=37, maxDocs=41962)
            0.0625 = fieldNorm(doc=3953)
      0.016980398 = weight(abstract_txt:eine in 3953) [ClassicSimilarity], result of:
        0.016980398 = score(doc=3953,freq=1.0), product of:
          0.07678429 = queryWeight, product of:
            1.4616082 = boost
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.014847248 = queryNorm
          0.22114417 = fieldWeight in 3953, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.0625 = fieldNorm(doc=3953)
      0.04610461 = weight(abstract_txt:zeigt in 3953) [ClassicSimilarity], result of:
        0.04610461 = score(doc=3953,freq=1.0), product of:
          0.13054882 = queryWeight, product of:
            1.5560933 = boost
            5.6505585 = idf(docFreq=400, maxDocs=41962)
            0.014847248 = queryNorm
          0.3531599 = fieldWeight in 3953, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.6505585 = idf(docFreq=400, maxDocs=41962)
            0.0625 = fieldNorm(doc=3953)
      0.15508749 = weight(abstract_txt:naturwissenschaftlichen in 3953) [ClassicSimilarity], result of:
        0.15508749 = score(doc=3953,freq=1.0), product of:
          0.29308566 = queryWeight, product of:
            2.3315592 = boost
            8.466466 = idf(docFreq=23, maxDocs=41962)
            0.014847248 = queryNorm
          0.5291541 = fieldWeight in 3953, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.466466 = idf(docFreq=23, maxDocs=41962)
            0.0625 = fieldNorm(doc=3953)
      0.15495864 = weight(abstract_txt:literatur in 3953) [ClassicSimilarity], result of:
        0.15495864 = score(doc=3953,freq=2.0), product of:
          0.2929233 = queryWeight, product of:
            3.2964091 = boost
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.014847248 = queryNorm
          0.52900755 = fieldWeight in 3953, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.0625 = fieldNorm(doc=3953)
    0.2 = coord(5/25)
  3. Schael, F.: Wie lange wird Literatur nachgefragt? : Eine Untersuchung zu Alterung und Nutzung von Literatur (2003) 0.08 
    0.07882632 = sum of:
  0.07882632 = product of:
    0.3941316 = sum of:
      0.06499463 = weight(abstract_txt:alter in 2424) [ClassicSimilarity], result of:
        0.06499463 = score(doc=2424,freq=1.0), product of:
          0.11226517 = queryWeight, product of:
            1.0203676 = boost
            7.4104133 = idf(docFreq=68, maxDocs=41962)
            0.014847248 = queryNorm
          0.57893854 = fieldWeight in 2424, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.4104133 = idf(docFreq=68, maxDocs=41962)
            0.078125 = fieldNorm(doc=2424)
      0.030017385 = weight(abstract_txt:eine in 2424) [ClassicSimilarity], result of:
        0.030017385 = score(doc=2424,freq=2.0), product of:
          0.07678429 = queryWeight, product of:
            1.4616082 = boost
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.014847248 = queryNorm
          0.39093134 = fieldWeight in 2424, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.078125 = fieldNorm(doc=2424)
      0.057630762 = weight(abstract_txt:zeigt in 2424) [ClassicSimilarity], result of:
        0.057630762 = score(doc=2424,freq=1.0), product of:
          0.13054882 = queryWeight, product of:
            1.5560933 = boost
            5.6505585 = idf(docFreq=400, maxDocs=41962)
            0.014847248 = queryNorm
          0.44144988 = fieldWeight in 2424, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.6505585 = idf(docFreq=400, maxDocs=41962)
            0.078125 = fieldNorm(doc=2424)
      0.10452344 = weight(abstract_txt:funktion in 2424) [ClassicSimilarity], result of:
        0.10452344 = score(doc=2424,freq=1.0), product of:
          0.19415379 = queryWeight, product of:
            1.8976761 = boost
            6.8909297 = idf(docFreq=115, maxDocs=41962)
            0.014847248 = queryNorm
          0.53835386 = fieldWeight in 2424, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.8909297 = idf(docFreq=115, maxDocs=41962)
            0.078125 = fieldNorm(doc=2424)
      0.13696538 = weight(abstract_txt:literatur in 2424) [ClassicSimilarity], result of:
        0.13696538 = score(doc=2424,freq=1.0), product of:
          0.2929233 = queryWeight, product of:
            3.2964091 = boost
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.014847248 = queryNorm
          0.46758103 = fieldWeight in 2424, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.078125 = fieldNorm(doc=2424)
    0.2 = coord(5/25)
  4. Haber, P.; Hodel, J.: ¬Die History Toolbox der Universität Basel : Wie die Kulturwissenschaften mit dem Traum von der Bibhotheca Universalis umgehen (2004) 0.07 
    0.06503658 = sum of:
  0.06503658 = product of:
    0.32518288 = sum of:
      0.056295507 = weight(abstract_txt:betreffen in 4157) [ClassicSimilarity], result of:
        0.056295507 = score(doc=4157,freq=1.0), product of:
          0.12939292 = queryWeight, product of:
            1.095442 = boost
            7.9556403 = idf(docFreq=39, maxDocs=41962)
            0.014847248 = queryNorm
          0.4350741 = fieldWeight in 4157, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.9556403 = idf(docFreq=39, maxDocs=41962)
            0.0546875 = fieldNorm(doc=4157)
      0.10693553 = weight(abstract_txt:neuester in 4157) [ClassicSimilarity], result of:
        0.10693553 = score(doc=4157,freq=1.0), product of:
          0.1984614 = queryWeight, product of:
            1.3566636 = boost
            9.85276 = idf(docFreq=5, maxDocs=41962)
            0.014847248 = queryNorm
          0.5388228 = fieldWeight in 4157, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.85276 = idf(docFreq=5, maxDocs=41962)
            0.0546875 = fieldNorm(doc=4157)
      0.025734548 = weight(abstract_txt:eine in 4157) [ClassicSimilarity], result of:
        0.025734548 = score(doc=4157,freq=3.0), product of:
          0.07678429 = queryWeight, product of:
            1.4616082 = boost
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.014847248 = queryNorm
          0.33515382 = fieldWeight in 4157, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.0546875 = fieldNorm(doc=4157)
      0.040341534 = weight(abstract_txt:zeigt in 4157) [ClassicSimilarity], result of:
        0.040341534 = score(doc=4157,freq=1.0), product of:
          0.13054882 = queryWeight, product of:
            1.5560933 = boost
            5.6505585 = idf(docFreq=400, maxDocs=41962)
            0.014847248 = queryNorm
          0.30901492 = fieldWeight in 4157, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.6505585 = idf(docFreq=400, maxDocs=41962)
            0.0546875 = fieldNorm(doc=4157)
      0.09587576 = weight(abstract_txt:literatur in 4157) [ClassicSimilarity], result of:
        0.09587576 = score(doc=4157,freq=1.0), product of:
          0.2929233 = queryWeight, product of:
            3.2964091 = boost
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.014847248 = queryNorm
          0.32730672 = fieldWeight in 4157, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.0546875 = fieldNorm(doc=4157)
    0.2 = coord(5/25)
  5. Wyss, E.G.: Information Management (1994) 0.06 
    0.062512085 = sum of:
  0.062512085 = product of:
    0.39070055 = sum of:
      0.053084817 = weight(abstract_txt:jahren in 1399) [ClassicSimilarity], result of:
        0.053084817 = score(doc=1399,freq=1.0), product of:
          0.10944504 = queryWeight, product of:
            1.424778 = boost
            5.1737204 = idf(docFreq=645, maxDocs=41962)
            0.014847248 = queryNorm
          0.48503628 = fieldWeight in 1399, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.1737204 = idf(docFreq=645, maxDocs=41962)
            0.09375 = fieldNorm(doc=1399)
      0.03602086 = weight(abstract_txt:eine in 1399) [ClassicSimilarity], result of:
        0.03602086 = score(doc=1399,freq=2.0), product of:
          0.07678429 = queryWeight, product of:
            1.4616082 = boost
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.014847248 = queryNorm
          0.46911758 = fieldWeight in 1399, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5383067 = idf(docFreq=3314, maxDocs=41962)
            0.09375 = fieldNorm(doc=1399)
      0.069156915 = weight(abstract_txt:zeigt in 1399) [ClassicSimilarity], result of:
        0.069156915 = score(doc=1399,freq=1.0), product of:
          0.13054882 = queryWeight, product of:
            1.5560933 = boost
            5.6505585 = idf(docFreq=400, maxDocs=41962)
            0.014847248 = queryNorm
          0.52973986 = fieldWeight in 1399, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.6505585 = idf(docFreq=400, maxDocs=41962)
            0.09375 = fieldNorm(doc=1399)
      0.23243795 = weight(abstract_txt:literatur in 1399) [ClassicSimilarity], result of:
        0.23243795 = score(doc=1399,freq=2.0), product of:
          0.2929233 = queryWeight, product of:
            3.2964091 = boost
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.014847248 = queryNorm
          0.79351133 = fieldWeight in 1399, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.9850373 = idf(docFreq=286, maxDocs=41962)
            0.09375 = fieldNorm(doc=1399)
    0.16 = coord(4/25)