Search (5 results, page 1 of 1)

  • × author_ss:"Nicolaisen, J."
  • × theme_ss:"Informetrie"
  • × year_i:[2000 TO 2010}
  1. Nicolaisen, J.: Citation analysis (2007) 0.05 
    0.049725063 = product of:
  0.09945013 = sum of:
    0.09945013 = sum of:
      0.009727594 = weight(_text_:a in 6091) [ClassicSimilarity], result of:
        0.009727594 = score(doc=6091,freq=2.0), product of:
          0.04772363 = queryWeight, product of:
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.041389145 = queryNorm
          0.20383182 = fieldWeight in 6091, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            1.153047 = idf(docFreq=37942, maxDocs=44218)
            0.125 = fieldNorm(doc=6091)
      0.08972253 = weight(_text_:22 in 6091) [ClassicSimilarity], result of:
        0.08972253 = score(doc=6091,freq=2.0), product of:
          0.14493774 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.041389145 = 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)
    Date
    13. 7.2008 19:53:22
    Type
    a
  2. Nicolaisen, J.: ¬The J-shaped distribution of citedness (2002) 0.00 
    0.0027189455 = product of:
  0.005437891 = sum of:
    0.005437891 = product of:
      0.010875782 = sum of:
        0.010875782 = weight(_text_:a in 3765) [ClassicSimilarity], result of:
          0.010875782 = score(doc=3765,freq=10.0), product of:
            0.04772363 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.041389145 = queryNorm
            0.22789092 = fieldWeight in 3765, product of:
              3.1622777 = tf(freq=10.0), with freq of:
                10.0 = termFreq=10.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0625 = fieldNorm(doc=3765)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    A new approach for investigating the correlation between research quality and citation counts is presented and applied to a case study of the relationship between peer evaluations reflected in scholarly book reviews and the citation frequencies of reviewed books. Results of the study designate a J-shaped distribution between the considered variables, presumably caused by a skewed allocation of negative citations. The paper concludes with suggestions for further research.
    Type
    a
  3. Frandsen, T.F.; Nicolaisen, J.: Intradisciplinary differences in database coverage and the consequences for bibliometric research (2008) 0.00 
    0.0021279112 = product of:
  0.0042558224 = sum of:
    0.0042558224 = product of:
      0.008511645 = sum of:
        0.008511645 = weight(_text_:a in 4391) [ClassicSimilarity], result of:
          0.008511645 = score(doc=4391,freq=8.0), product of:
            0.04772363 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.041389145 = queryNorm
            0.17835285 = fieldWeight in 4391, product of:
              2.828427 = tf(freq=8.0), with freq of:
                8.0 = termFreq=8.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0546875 = fieldNorm(doc=4391)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Bibliographic databases (including databases based on open access) are routinely used for bibliometric research. The value of a specific database depends to a large extent on the coverage of the discipline(s) under study. A number of studies have determined the coverage of databases in specific disciplines focusing on interdisciplinary differences; however, little is known about the potential existence of intradisciplinary differences in database coverage. Focusing on intradisciplinary differences, the article documents large database-coverage differences within two disciplines (economics and psychology). The point extends to include both the uneven coverage of specialties and research traditions. The implications for bibliometric research are discussed, and precautions which need to be taken are outlined.
    Type
    a
  4. Hjoerland, B.; Nicolaisen, J.: Bradford's law of scattering : ambiguities in the concept of "subject" (2005) 0.00 
    0.0018615347 = product of:
  0.0037230693 = sum of:
    0.0037230693 = product of:
      0.0074461387 = sum of:
        0.0074461387 = weight(_text_:a in 157) [ClassicSimilarity], result of:
          0.0074461387 = score(doc=157,freq=12.0), product of:
            0.04772363 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.041389145 = queryNorm
            0.15602624 = fieldWeight in 157, product of:
              3.4641016 = tf(freq=12.0), with freq of:
                12.0 = termFreq=12.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.0390625 = fieldNorm(doc=157)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Bradfordrsquos law of scattering is said to be about subject scattering in information sources. However, in spite of a corpus of writings about the meaning of the word ldquosubjectrdquo and equivalent terms such as ldquoaboutnessrdquo or ldquotopicalityrdquo, the meaning of ldquosubjectrdquo has never been explicitly addressed in relation to Bradfordrsquos law. This paper introduces a distinction between Lexical scattering, Semantic scattering, and Subject scattering. Neither Bradford himself nor any follower has explicitly considered the differences between these three and the implications for the practical applications of Bradfordrsquos law. Traditionally, Bradfordrsquos law has been seen as a neutral and objective tool for the selection of the most central information sources in a field. However, it is hard to find actual reports that describe how Bradfordrsquos law has been applied in practical library and information services. Theoretical as well as historical evidence suggest that the selection of journals based on Bradford-distributions tend to favorite dominant theories and views while suppressing views other than the mainstream at a given time.
    Type
    a
  5. Nicolaisen, J.; Hjoerland, B.: Practical potentials of Bradford's law : a critical examination of the received view (2007) 0.00 
    0.001289709 = product of:
  0.002579418 = sum of:
    0.002579418 = product of:
      0.005158836 = sum of:
        0.005158836 = weight(_text_:a in 830) [ClassicSimilarity], result of:
          0.005158836 = score(doc=830,freq=4.0), product of:
            0.04772363 = queryWeight, product of:
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.041389145 = queryNorm
            0.10809815 = fieldWeight in 830, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.153047 = idf(docFreq=37942, maxDocs=44218)
              0.046875 = fieldNorm(doc=830)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Type
    a

Authors

Themes