Search (119 results, page 1 of 6)

  • × theme_ss:"Informetrie"
  1. Umstätter, W.; Rehm, M.; Dorogi, Z.: ¬Die Halbwertszeit in der naturwissenschaftlichen Literatur (1982) 0.07 
    0.069254 = product of:
  0.138508 = sum of:
    0.138508 = product of:
      0.277016 = sum of:
        0.277016 = weight(_text_:t1 in 5279) [ClassicSimilarity], result of:
          0.277016 = score(doc=5279,freq=2.0), product of:
            0.44481978 = queryWeight, product of:
              9.394302 = idf(docFreq=9, maxDocs=44218)
              0.047349952 = queryNorm
            0.6227601 = fieldWeight in 5279, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              9.394302 = idf(docFreq=9, maxDocs=44218)
              0.046875 = fieldNorm(doc=5279)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    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
  2. Wagner-Döbler, R.: Kognitive Mobilität und Zipfs "Principle of Least Effort" (2004) 0.06 
    0.057711672 = product of:
  0.115423344 = sum of:
    0.115423344 = product of:
      0.23084669 = sum of:
        0.23084669 = weight(_text_:t1 in 3159) [ClassicSimilarity], result of:
          0.23084669 = score(doc=3159,freq=2.0), product of:
            0.44481978 = queryWeight, product of:
              9.394302 = idf(docFreq=9, maxDocs=44218)
              0.047349952 = queryNorm
            0.5189668 = fieldWeight in 3159, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              9.394302 = idf(docFreq=9, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3159)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Unter kognitiver Mobilität verstehe ich im folgenden nicht die Mobilität von Information, sondern die Bewegung des Denkens, und zwar hier des wissenschaftlichen Denkens. Wissenschaftliches Denken vollzieht sich disziplinär sowie interdisziplinär, im informationellen Austausch von Disziplinen und Forschungsgebieten. Dieser Austausch unterliegt, wie die Wissenschaftsgeschichte lehrt, einer Entwicklungsdynamik, die als Abfolge von Wanderungen oder Übergängen zwischen Forschungsgebieten in folgendem Sinn verständen werden kann. Beschäftigt sich ein Forscher A zum Zeitpunkt t1 mit Forschungsgebiet X und zum Zeitpunkt t2 als nächstes mit Forschungsgebiet Y, so liegt ein Übergang von X nach Y vor. Gibt es für diese Art von Übergängen charakteristische Eigenschaften oder Regularitäten.> Ein wichtiges Merkmal solcher Übergänge ist der Grad der Verwandtschaft, der kognitiven Affinität zwischen Ausgangs- und Zielgebiet der Migration. Am Beispiel der rund 150.000 Migrationen zwischen den mathematischen Subdisziplinen, wie sie sich in den Zeitschriftenartikel-Nachweisen der Mathematical Reviews von 1959 bis 1975 widerspiegeln, wurde das Verhältnis von kognitiver Mobilität und Affinität empirisch systematisch untersucht. Es bestätigte sich George K. Zipfs "Principle of Least Effort". Zählreiche Mechanismen und Faustregeln der Wissensorganisation dürften der Wirksamkeit dieses Prinzips zugrundeliegen.
  3. Nicholls, P.T.: Empirical validation of Lotka's law (1986) 0.03 
    0.025661059 = product of:
  0.051322117 = sum of:
    0.051322117 = product of:
      0.102644235 = sum of:
        0.102644235 = weight(_text_:22 in 5509) [ClassicSimilarity], result of:
          0.102644235 = score(doc=5509,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.61904186 = fieldWeight in 5509, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.125 = fieldNorm(doc=5509)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Information processing and management. 22(1986), S.417-419
  4. Nicolaisen, J.: Citation analysis (2007) 0.03 
    0.025661059 = product of:
  0.051322117 = sum of:
    0.051322117 = product of:
      0.102644235 = sum of:
        0.102644235 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
          0.102644235 = score(doc=6091,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.61904186 = fieldWeight in 6091, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.125 = fieldNorm(doc=6091)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    13. 7.2008 19:53:22
  5. Fiala, J.: Information flood : fiction and reality (1987) 0.03 
    0.025661059 = product of:
  0.051322117 = sum of:
    0.051322117 = product of:
      0.102644235 = sum of:
        0.102644235 = weight(_text_:22 in 1080) [ClassicSimilarity], result of:
          0.102644235 = score(doc=1080,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.61904186 = fieldWeight in 1080, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.125 = fieldNorm(doc=1080)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Thermochimica acta. 110(1987), S.11-22
  6. Su, Y.; Han, L.-F.: ¬A new literature growth model : variable exponential growth law of literature (1998) 0.02 
    0.022681385 = product of:
  0.04536277 = sum of:
    0.04536277 = product of:
      0.09072554 = sum of:
        0.09072554 = weight(_text_:22 in 3690) [ClassicSimilarity], result of:
          0.09072554 = score(doc=3690,freq=4.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.54716086 = fieldWeight in 3690, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=3690)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 5.1999 19:22:35
  7. Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001) 0.02 
    0.022681385 = product of:
  0.04536277 = sum of:
    0.04536277 = product of:
      0.09072554 = sum of:
        0.09072554 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
          0.09072554 = score(doc=3925,freq=4.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.54716086 = fieldWeight in 3925, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=3925)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 7.2006 15:22:28
  8. Diodato, V.: Dictionary of bibliometrics (1994) 0.02 
    0.022453427 = product of:
  0.044906855 = sum of:
    0.044906855 = product of:
      0.08981371 = sum of:
        0.08981371 = weight(_text_:22 in 5666) [ClassicSimilarity], result of:
          0.08981371 = score(doc=5666,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.5416616 = fieldWeight in 5666, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=5666)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Footnote
    Rez. in: Journal of library and information science 22(1996) no.2, S.116-117 (L.C. Smith)
  9. Bookstein, A.: Informetric distributions : I. Unified overview (1990) 0.02 
    0.022453427 = product of:
  0.044906855 = sum of:
    0.044906855 = product of:
      0.08981371 = sum of:
        0.08981371 = weight(_text_:22 in 6902) [ClassicSimilarity], result of:
          0.08981371 = score(doc=6902,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.5416616 = fieldWeight in 6902, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=6902)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 7.2006 18:55:29
  10. Bookstein, A.: Informetric distributions : II. Resilience to ambiguity (1990) 0.02 
    0.022453427 = product of:
  0.044906855 = sum of:
    0.044906855 = product of:
      0.08981371 = sum of:
        0.08981371 = weight(_text_:22 in 4689) [ClassicSimilarity], result of:
          0.08981371 = score(doc=4689,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.5416616 = fieldWeight in 4689, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=4689)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 7.2006 18:55:55
  11. Lewison, G.: ¬The work of the Bibliometrics Research Group (City University) and associates (2005) 0.02 
    0.019245794 = product of:
  0.038491588 = sum of:
    0.038491588 = product of:
      0.076983176 = sum of:
        0.076983176 = weight(_text_:22 in 4890) [ClassicSimilarity], result of:
          0.076983176 = score(doc=4890,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.46428138 = fieldWeight in 4890, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=4890)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    20. 1.2007 17:02:22
  12. Marx, W.; Bornmann, L.: On the problems of dealing with bibliometric data (2014) 0.02 
    0.019245794 = product of:
  0.038491588 = sum of:
    0.038491588 = product of:
      0.076983176 = sum of:
        0.076983176 = weight(_text_:22 in 1239) [ClassicSimilarity], result of:
          0.076983176 = score(doc=1239,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.46428138 = fieldWeight in 1239, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=1239)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    18. 3.2014 19:13:22
  13. Raan, A.F.J. van: Statistical properties of bibliometric indicators : research group indicator distributions and correlations (2006) 0.01 
    0.013608833 = product of:
  0.027217666 = sum of:
    0.027217666 = product of:
      0.05443533 = sum of:
        0.05443533 = weight(_text_:22 in 5275) [ClassicSimilarity], result of:
          0.05443533 = score(doc=5275,freq=4.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.32829654 = fieldWeight in 5275, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=5275)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 7.2006 16:20:22
  14. Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009) 0.01 
    0.013608833 = product of:
  0.027217666 = sum of:
    0.027217666 = product of:
      0.05443533 = sum of:
        0.05443533 = weight(_text_:22 in 2763) [ClassicSimilarity], result of:
          0.05443533 = score(doc=2763,freq=4.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.32829654 = fieldWeight in 2763, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=2763)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 3.2009 19:22:35
  15. Li, T.-C.: Reference sources in periodicals : research note (1995) 0.01 
    0.012830529 = product of:
  0.025661059 = sum of:
    0.025661059 = product of:
      0.051322117 = sum of:
        0.051322117 = weight(_text_:22 in 5092) [ClassicSimilarity], result of:
          0.051322117 = score(doc=5092,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.30952093 = fieldWeight in 5092, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=5092)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Presents a list of 53 periodicals in 22 subject fields which regularly provide bibliographies of theses, research in progress and patents in their particular subject field. The fields of business, economics, history and literature have most periodical listings of dissertations and theses. Also lists 63 periodicals in 25 sub-disciplines which provide rankings or ratings. Rankings and ratings information predominates in the fields of business, sports and games, finance and banking, and library and information science
  16. Pichappan, P.; Sangaranachiyar, S.: Ageing approach to scientific eponyms (1996) 0.01 
    0.012830529 = product of:
  0.025661059 = sum of:
    0.025661059 = product of:
      0.051322117 = sum of:
        0.051322117 = weight(_text_:22 in 80) [ClassicSimilarity], result of:
          0.051322117 = score(doc=80,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.30952093 = fieldWeight in 80, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=80)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Footnote
    Report presented at the 16th National Indian Association of Special Libraries and Information Centres Seminar Special Interest Group Meeting on Informatrics in Bombay, 19-22 Dec 94
  17. Mommoh, O.M.: Subject analysis of post-graduate theses in library, archival and information science at Ahmadu Bello University, Zaria (1995/96) 0.01 
    0.012830529 = product of:
  0.025661059 = sum of:
    0.025661059 = product of:
      0.051322117 = sum of:
        0.051322117 = weight(_text_:22 in 673) [ClassicSimilarity], result of:
          0.051322117 = score(doc=673,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.30952093 = fieldWeight in 673, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=673)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Library focus. 13/14(1995/96), S.22-25
  18. Chongde, W.; Zhe, W.: Evaluation of the models for Bradford's law (1998) 0.01 
    0.012830529 = product of:
  0.025661059 = sum of:
    0.025661059 = product of:
      0.051322117 = sum of:
        0.051322117 = weight(_text_:22 in 3688) [ClassicSimilarity], result of:
          0.051322117 = score(doc=3688,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.30952093 = fieldWeight in 3688, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=3688)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 5.1999 19:12:28
  19. Tijssen, R.J.W.; Wijk, E. van: ¬The global science base of information and communication technologies : bibliometric analysis of ICT research papers (1998) 0.01 
    0.012830529 = product of:
  0.025661059 = sum of:
    0.025661059 = product of:
      0.051322117 = sum of:
        0.051322117 = weight(_text_:22 in 3691) [ClassicSimilarity], result of:
          0.051322117 = score(doc=3691,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.30952093 = fieldWeight in 3691, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=3691)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 5.1999 19:26:54
  20. Thelwall, M.; Ruschenburg, T.: Grundlagen und Forschungsfelder der Webometrie (2006) 0.01 
    0.012830529 = product of:
  0.025661059 = sum of:
    0.025661059 = product of:
      0.051322117 = sum of:
        0.051322117 = weight(_text_:22 in 77) [ClassicSimilarity], result of:
          0.051322117 = score(doc=77,freq=2.0), product of:
            0.16581146 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.047349952 = queryNorm
            0.30952093 = fieldWeight in 77, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0625 = fieldNorm(doc=77)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    4.12.2006 12:12:22

Authors

Years

Languages

  • e 108
  • d 10
  • ro 1
  • More… Less…

Types

  • a 117
  • m 2
  • el 1
  • s 1
  • More… Less…

Themes

Subjects

Classifications