Search (41 results, page 1 of 3)

  • × theme_ss:"Citation indexing"
  1. Ahlgren, P.; Jarneving, B.; Rousseau, R.: Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient (2003) 0.04 
    0.039396457 = product of:
  0.078792915 = sum of:
    0.078792915 = sum of:
      0.054083776 = weight(_text_:r in 5171) [ClassicSimilarity], result of:
        0.054083776 = score(doc=5171,freq=12.0), product of:
          0.15092614 = queryWeight, product of:
            3.3102584 = idf(docFreq=4387, maxDocs=44218)
            0.045593463 = queryNorm
          0.358346 = fieldWeight in 5171, product of:
            3.4641016 = tf(freq=12.0), with freq of:
              12.0 = termFreq=12.0
            3.3102584 = idf(docFreq=4387, maxDocs=44218)
            0.03125 = fieldNorm(doc=5171)
      0.024709139 = weight(_text_:22 in 5171) [ClassicSimilarity], result of:
        0.024709139 = score(doc=5171,freq=2.0), product of:
          0.15966053 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.045593463 = queryNorm
          0.15476047 = fieldWeight in 5171, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03125 = fieldNorm(doc=5171)
  0.5 = coord(1/2)
    Abstract
    Ahlgren, Jarneving, and. Rousseau review accepted procedures for author co-citation analysis first pointing out that since in the raw data matrix the row and column values are identical i,e, the co-citation count of two authors, there is no clear choice for diagonal values. They suggest the number of times an author has been co-cited with himself excluding self citation rather than the common treatment as zeros or as missing values. When the matrix is converted to a similarity matrix the normal procedure is to create a matrix of Pearson's r coefficients between data vectors. Ranking by r and by co-citation frequency and by intuition can easily yield three different orders. It would seem necessary that the adding of zeros to the matrix will not affect the value or the relative order of similarity measures but it is shown that this is not the case with Pearson's r. Using 913 bibliographic descriptions form the Web of Science of articles form JASIS and Scientometrics, authors names were extracted, edited and 12 information retrieval authors and 12 bibliometric authors each from the top 100 most cited were selected. Co-citation and r value (diagonal elements treated as missing) matrices were constructed, and then reconstructed in expanded form. Adding zeros can both change the r value and the ordering of the authors based upon that value. A chi-squared distance measure would not violate these requirements, nor would the cosine coefficient. It is also argued that co-citation data is ordinal data since there is no assurance of an absolute zero number of co-citations, and thus Pearson is not appropriate. The number of ties in co-citation data make the use of the Spearman rank order coefficient problematic.
    Date
    9. 7.2006 10:22:35
  2. Hjerppe, R.: ¬An outline of bibliometrics and citation analysis (1980) 0.03 
    0.031225283 = product of:
  0.062450565 = sum of:
    0.062450565 = product of:
      0.12490113 = sum of:
        0.12490113 = weight(_text_:r in 1115) [ClassicSimilarity], result of:
          0.12490113 = score(doc=1115,freq=4.0), product of:
            0.15092614 = queryWeight, product of:
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.045593463 = queryNorm
            0.8275646 = fieldWeight in 1115, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.125 = fieldNorm(doc=1115)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Type
    r
  3. Nicolaisen, J.: Citation analysis (2007) 0.02 
    0.024709139 = product of:
  0.049418278 = sum of:
    0.049418278 = product of:
      0.098836556 = sum of:
        0.098836556 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
          0.098836556 = score(doc=6091,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = 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
  4. Døsen, K.: One more reference on self-reference (1992) 0.02 
    0.024709139 = product of:
  0.049418278 = sum of:
    0.049418278 = product of:
      0.098836556 = sum of:
        0.098836556 = weight(_text_:22 in 4604) [ClassicSimilarity], result of:
          0.098836556 = score(doc=4604,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.61904186 = fieldWeight in 4604, 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=4604)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    7. 2.2005 14:10:22
  5. Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001) 0.02 
    0.021839999 = product of:
  0.043679997 = sum of:
    0.043679997 = product of:
      0.087359995 = sum of:
        0.087359995 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
          0.087359995 = score(doc=3925,freq=4.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = 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
  6. Page, L.; Brin, S.; Motwani, R.; Winograd, T.: ¬The PageRank citation ranking : Bringing order to the Web (1999) 0.02 
    0.01931966 = product of:
  0.03863932 = sum of:
    0.03863932 = product of:
      0.07727864 = sum of:
        0.07727864 = weight(_text_:r in 496) [ClassicSimilarity], result of:
          0.07727864 = score(doc=496,freq=2.0), product of:
            0.15092614 = queryWeight, product of:
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.045593463 = queryNorm
            0.51202947 = fieldWeight in 496, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.109375 = fieldNorm(doc=496)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
  7. Rajan, T.N.; Guha, B.; Sayanarayana, R.: Associate relationship of concepts as seen through citations and citation index (1982) 0.02 
    0.016559707 = product of:
  0.033119414 = sum of:
    0.033119414 = product of:
      0.06623883 = sum of:
        0.06623883 = weight(_text_:r in 58) [ClassicSimilarity], result of:
          0.06623883 = score(doc=58,freq=2.0), product of:
            0.15092614 = queryWeight, product of:
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.045593463 = queryNorm
            0.4388824 = fieldWeight in 58, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.09375 = fieldNorm(doc=58)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
  8. Garfield, E.; Stock, W.G.: Citation Consciousness : Interview with Eugene Garfiels, chairman emeritus of ISI; Philadelphia (2002) 0.02 
    0.015443211 = product of:
  0.030886423 = sum of:
    0.030886423 = product of:
      0.061772846 = sum of:
        0.061772846 = weight(_text_:22 in 613) [ClassicSimilarity], result of:
          0.061772846 = score(doc=613,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.38690117 = fieldWeight in 613, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=613)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Password. 2002, H.6, S.22-25
  9. Larivière, V.; Gingras, Y.; Archambault, E.: ¬The decline in the concentration of citations, 1900-2007 (2009) 0.01 
    0.013104 = product of:
  0.026208 = sum of:
    0.026208 = product of:
      0.052416 = sum of:
        0.052416 = weight(_text_:22 in 2763) [ClassicSimilarity], result of:
          0.052416 = score(doc=2763,freq=4.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = 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
  10. Bensman, S.J.: Eugene Garfield, Francis Narin, and PageRank : the theoretical bases of the Google search engine (2013) 0.01 
    0.0123545695 = product of:
  0.024709139 = sum of:
    0.024709139 = product of:
      0.049418278 = sum of:
        0.049418278 = weight(_text_:22 in 1149) [ClassicSimilarity], result of:
          0.049418278 = score(doc=1149,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.30952093 = fieldWeight in 1149, 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=1149)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    17.12.2013 11:02:22
  11. Rousseau, R.: Timelines in citation research (2006) 0.01 
    0.011039805 = product of:
  0.02207961 = sum of:
    0.02207961 = product of:
      0.04415922 = sum of:
        0.04415922 = weight(_text_:r in 1746) [ClassicSimilarity], result of:
          0.04415922 = score(doc=1746,freq=2.0), product of:
            0.15092614 = queryWeight, product of:
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.045593463 = queryNorm
            0.29258826 = fieldWeight in 1746, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.0625 = fieldNorm(doc=1746)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
  12. Castro, R. de; Grossmann, J.W.: Famous trails to Paul Erdös (1999) 0.01 
    0.011039805 = product of:
  0.02207961 = sum of:
    0.02207961 = product of:
      0.04415922 = sum of:
        0.04415922 = weight(_text_:r in 3991) [ClassicSimilarity], result of:
          0.04415922 = score(doc=3991,freq=2.0), product of:
            0.15092614 = queryWeight, product of:
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.045593463 = queryNorm
            0.29258826 = fieldWeight in 3991, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.0625 = fieldNorm(doc=3991)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
  13. Garfield, E.: Recollections of Irving H. Sher 1924-1996 : Polymath/information scientist extraordinaire (2001) 0.01 
    0.010810248 = product of:
  0.021620495 = sum of:
    0.021620495 = product of:
      0.04324099 = sum of:
        0.04324099 = weight(_text_:22 in 6920) [ClassicSimilarity], result of:
          0.04324099 = score(doc=6920,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.2708308 = fieldWeight in 6920, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=6920)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    16.12.2001 14:01:22
  14. Van der Veer Martens, B.; Goodrum, G.: ¬The diffusion of theories : a functional approach (2006) 0.01 
    0.010810248 = product of:
  0.021620495 = sum of:
    0.021620495 = product of:
      0.04324099 = sum of:
        0.04324099 = weight(_text_:22 in 5269) [ClassicSimilarity], result of:
          0.04324099 = score(doc=5269,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.2708308 = fieldWeight in 5269, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=5269)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 7.2006 15:20:01
  15. Tay, A.: ¬The next generation discovery citation indexes : a review of the landscape in 2020 (2020) 0.01 
    0.010810248 = product of:
  0.021620495 = sum of:
    0.021620495 = product of:
      0.04324099 = sum of:
        0.04324099 = weight(_text_:22 in 40) [ClassicSimilarity], result of:
          0.04324099 = score(doc=40,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.2708308 = fieldWeight in 40, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=40)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    17.11.2020 12:22:59
  16. Milman, B.L.: Individual co-citation clusters as nuclei of complete and dynamic informetric models of scientific and technological areas (1994) 0.01 
    0.00965983 = product of:
  0.01931966 = sum of:
    0.01931966 = product of:
      0.03863932 = sum of:
        0.03863932 = weight(_text_:r in 37) [ClassicSimilarity], result of:
          0.03863932 = score(doc=37,freq=2.0), product of:
            0.15092614 = queryWeight, product of:
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.045593463 = queryNorm
            0.25601473 = fieldWeight in 37, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.0546875 = fieldNorm(doc=37)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Describes the construction of improved informetric models of individual scientific and technological areas on the basis of individual co citation clusters. The developed methodology of replenishment of research front with accidently absent papers describes the model more completely. Proposes the simple method of cluster 'dynamization' for the study of evolution of research area. The transition under consideration from co citation clusters to lexical maps of papers and patents enables the monitoring of the relationshuip between R and D in a given technological area. Provides the example from modern chemical engineering of Pressure-Swing Adsorption
  17. Wagner-Döbler, R.: ¬Die Nutzung von Zitationsindizes durch deutsche Soziologen : Ergebnisse einer Umfrage (2001) 0.01 
    0.00965983 = product of:
  0.01931966 = sum of:
    0.01931966 = product of:
      0.03863932 = sum of:
        0.03863932 = weight(_text_:r in 6831) [ClassicSimilarity], result of:
          0.03863932 = score(doc=6831,freq=2.0), product of:
            0.15092614 = queryWeight, product of:
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.045593463 = queryNorm
            0.25601473 = fieldWeight in 6831, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.3102584 = idf(docFreq=4387, maxDocs=44218)
              0.0546875 = fieldNorm(doc=6831)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
  18. Campanario, J.M.: Have referees rejected some of the most-cited articles of all times? (1996) 0.01 
    0.009265927 = product of:
  0.018531853 = sum of:
    0.018531853 = product of:
      0.037063707 = sum of:
        0.037063707 = weight(_text_:22 in 4215) [ClassicSimilarity], result of:
          0.037063707 = score(doc=4215,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.23214069 = fieldWeight in 4215, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=4215)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    In this article a quantitative study is reported on the resistance that scientists may encounter when they do innovative work or when they attempt to publish articles that later become highly cited. A set of 205 commentaries by authors of some of the most-cited papers of all times have been examined in order to identify those articles whose authors encountered difficulty in getting his or her work published. There are 22 commentaries (10,7%) in which authors mention some difficulty or resistance in doing or publishing the research reported in the article. Three of the articles which had problems in being published are the most cited from their respective journals. According the authors' commentaries, although sometimes referees' negative evaluations can help improve the articles, in other instances referees and editors wrongly rejected the highly cited articles
  19. Snyder, H.; Bonzi, S.: Patterns of self-citation across disciplines : 1980-1989 (1998) 0.01 
    0.009265927 = product of:
  0.018531853 = sum of:
    0.018531853 = product of:
      0.037063707 = sum of:
        0.037063707 = weight(_text_:22 in 3692) [ClassicSimilarity], result of:
          0.037063707 = score(doc=3692,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.23214069 = fieldWeight in 3692, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=3692)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    22. 5.1999 19:33:24
  20. wst: Cut-and-paste-Wissenschaft (2003) 0.01 
    0.009265927 = product of:
  0.018531853 = sum of:
    0.018531853 = product of:
      0.037063707 = sum of:
        0.037063707 = weight(_text_:22 in 1270) [ClassicSimilarity], result of:
          0.037063707 = score(doc=1270,freq=2.0), product of:
            0.15966053 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.045593463 = queryNorm
            0.23214069 = fieldWeight in 1270, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.046875 = fieldNorm(doc=1270)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Content
    "Mikhail Simkin und Vwani Roychowdhury von der University of Califomia, Los Angeles, haben eine in der wissenschaftlichen Gemeinschaft verbreitete Unsitte erstmals quantitativ erfasst. Die Wissenschaftler analysierten die Verbreitung von Druckfehlern in den Literaturlisten wissenschaftlicher Arbeiten (www.arxiv.org/abs/cond-mat/0212043). 78 Prozent aller zitierten Aufsätze - so schätzen die Forscher - haben die zitierenden Wissenschaftler demnach nicht gelesen, sondern nur per 'cut and paste' von einer Vorlage in ihre eigene Literaturliste übernommen. Das könne man beispielsweise abschätzen aus der Analyse fehlerhafter Seitenangaben in der Literaturliste eines 1973 veröffentlichten Aufsatzes über die Struktur zweidimensionaler Kristalle: Dieser Aufsatz ist rund 4300 mal zitiert worden. In 196 Fällen enthalten die Zitate jedoch Fehler in der Jahreszahl, dem Band der Zeitschrift oder der Seitenzahl, die als Indikatoren für cut and paste genommen werden können, denn man kann, obwohl es Milliarden Möglichkeiten gibt, nur 45 verschiedene Arten von Druckfehlern unterscheiden. In erster Näherung ergibt sich eine Obergrenze für die Zahl der `echten Leser' daher aus der Zahl der unterscheidbaren Druckfehler (45) geteilt durch die Gesamtzahl der Publikationen mit Druckfehler (196), das macht etwa 22 Prozent."

Authors

Years

Languages

  • e 31
  • d 10

Types

  • a 38
  • el 4
  • r 2
  • More… Less…

Themes