Search (10 results, page 1 of 1)

Leydesdorff, L.: Caveats for the use of citation indicators in research and journal evaluations (2008) 0.01
```
0.0132371 = product of:
  0.0397113 = sum of:
    0.0397113 = product of:
      0.0794226 = sum of:
        0.0794226 = weight(_text_:publishing in 1361) [ClassicSimilarity], result of:
          0.0794226 = score(doc=1361,freq=2.0), product of:
            0.24522576 = queryWeight, product of:
              4.885643 = idf(docFreq=907, maxDocs=44218)
              0.05019314 = queryNorm
            0.32387543 = fieldWeight in 1361, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.885643 = idf(docFreq=907, maxDocs=44218)
              0.046875 = fieldNorm(doc=1361)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
```
Abstract

Aging of publications, percentage of self-citations, and impact vary from journal to journal within fields of science. The assumption that citation and publication practices are homogenous within specialties and fields of science is invalid. Furthermore, the delineation of fields and among specialties is fuzzy. Institutional units of analysis and persons may move between fields or span different specialties. The match between the citation index and institutional profiles varies among institutional units and nations. The respective matches may heavily affect the representation of the units. Non-Institute of Scientific Information (ISI) journals are increasingly cornered into transdisciplinary Mode-2 functions with the exception of specialist journals publishing in languages other than English. An externally cited impact factor can be calculated for these journals. The citation impact of non-ISI journals will be demonstrated using Science and Public Policy as the example.
Shelton, R.D.; Leydesdorff, L.: Publish or patent : bibliometric evidence for empirical trade-offs in national funding strategies (2012) 0.01
```
0.011030916 = product of:
  0.03309275 = sum of:
    0.03309275 = product of:
      0.0661855 = sum of:
        0.0661855 = weight(_text_:publishing in 70) [ClassicSimilarity], result of:
          0.0661855 = score(doc=70,freq=2.0), product of:
            0.24522576 = queryWeight, product of:
              4.885643 = idf(docFreq=907, maxDocs=44218)
              0.05019314 = queryNorm
            0.26989618 = fieldWeight in 70, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.885643 = idf(docFreq=907, maxDocs=44218)
              0.0390625 = fieldNorm(doc=70)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
```
Abstract

Multivariate linear regression models suggest a trade-off in allocations of national research and development (R&D). Government funding and spending in the higher education sector encourage publications as a long-term research benefit. Conversely, other components such as industrial funding and spending in the business sector encourage patenting. Our results help explain why the United States trails the European Union in publications: The focus in the United States is on industrial funding-some 70% of its total R&D investment. Likewise, our results also help explain why the European Union trails the United States in patenting, since its focus on government funding is less effective than industrial funding in predicting triadic patenting. Government funding contributes negatively to patenting in a multiple regression, and this relationship is significant in the case of triadic patenting. We provide new forecasts about the relationships of the United States, the European Union, and China for publishing; these results suggest much later dates for changes than previous forecasts because Chinese growth has been slowing down since 2003. Models for individual countries might be more successful than regression models whose parameters are averaged over a set of countries because nations can be expected to differ historically in terms of the institutional arrangements and funding schemes.
Bauer, J.; Leydesdorff, L.; Bornmann, L.: Highly cited papers in Library and Information Science (LIS) : authors, institutions, and network structures (2016) 0.01
```
0.011030916 = product of:
  0.03309275 = sum of:
    0.03309275 = product of:
      0.0661855 = sum of:
        0.0661855 = weight(_text_:publishing in 3231) [ClassicSimilarity], result of:
          0.0661855 = score(doc=3231,freq=2.0), product of:
            0.24522576 = queryWeight, product of:
              4.885643 = idf(docFreq=907, maxDocs=44218)
              0.05019314 = queryNorm
            0.26989618 = fieldWeight in 3231, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.885643 = idf(docFreq=907, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3231)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)
```
Abstract

As a follow-up to the highly cited authors list published by Thomson Reuters in June 2014, we analyzed the top 1% most frequently cited papers published between 2002 and 2012 included in the Web of Science (WoS) subject category "Information Science & Library Science." In all, 798 authors contributed to 305 top 1% publications; these authors were employed at 275 institutions. The authors at Harvard University contributed the largest number of papers, when the addresses are whole-number counted. However, Leiden University leads the ranking if fractional counting is used. Twenty-three of the 798 authors were also listed as most highly cited authors by Thomson Reuters in June 2014 (http://highlycited.com/). Twelve of these 23 authors were involved in publishing 4 or more of the 305 papers under study. Analysis of coauthorship relations among the 798 highly cited scientists shows that coauthorships are based on common interests in a specific topic. Three topics were important between 2002 and 2012: (a) collection and exploitation of information in clinical practices; (b) use of the Internet in public communication and commerce; and (c) scientometrics.

Leydesdorff, L.: ¬The construction and globalization of the knowledge base in inter-human communication systems (2003) 0.01

0.0068004774 = product of:
  0.020401431 = sum of:
    0.020401431 = product of:
      0.040802862 = sum of:
        0.040802862 = weight(_text_:22 in 1621) [ClassicSimilarity], result of:
          0.040802862 = score(doc=1621,freq=2.0), product of:
            0.17576782 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05019314 = queryNorm
            0.23214069 = fieldWeight in 1621, 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=1621)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)

Date: 22. 5.2003 19:48:04

Leydesdorff, L.: Can networks of journal-journal citations be used as indicators of change in the social sciences? (2003) 0.01

0.0068004774 = product of:
  0.020401431 = sum of:
    0.020401431 = product of:
      0.040802862 = sum of:
        0.040802862 = weight(_text_:22 in 4460) [ClassicSimilarity], result of:
          0.040802862 = score(doc=4460,freq=2.0), product of:
            0.17576782 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05019314 = queryNorm
            0.23214069 = fieldWeight in 4460, 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=4460)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)

Date: 6.11.2005 19:02:22

Leydesdorff, L.; Sun, Y.: National and international dimensions of the Triple Helix in Japan : university-industry-government versus international coauthorship relations (2009) 0.01

0.0068004774 = product of:
  0.020401431 = sum of:
    0.020401431 = product of:
      0.040802862 = sum of:
        0.040802862 = weight(_text_:22 in 2761) [ClassicSimilarity], result of:
          0.040802862 = score(doc=2761,freq=2.0), product of:
            0.17576782 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05019314 = queryNorm
            0.23214069 = fieldWeight in 2761, 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=2761)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)

Date: 22. 3.2009 19:07:20

Leydesdorff, L.; Bornmann, L.; Wagner, C.S.: ¬The relative influences of government funding and international collaboration on citation impact (2019) 0.01

0.0068004774 = product of:
  0.020401431 = sum of:
    0.020401431 = product of:
      0.040802862 = sum of:
        0.040802862 = weight(_text_:22 in 4681) [ClassicSimilarity], result of:
          0.040802862 = score(doc=4681,freq=2.0), product of:
            0.17576782 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05019314 = queryNorm
            0.23214069 = fieldWeight in 4681, 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=4681)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)

Date: 8. 1.2019 18:22:45

Leydesdorff, L.; Bornmann, L.: How fractional counting of citations affects the impact factor : normalization in terms of differences in citation potentials among fields of science (2011) 0.01

0.0056670653 = product of:
  0.017001195 = sum of:
    0.017001195 = product of:
      0.03400239 = sum of:
        0.03400239 = weight(_text_:22 in 4186) [ClassicSimilarity], result of:
          0.03400239 = score(doc=4186,freq=2.0), product of:
            0.17576782 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05019314 = queryNorm
            0.19345059 = fieldWeight in 4186, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4186)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)

Date: 22. 1.2011 12:51:07

Hellsten, I.; Leydesdorff, L.: ¬The construction of interdisciplinarity : the development of the knowledge base and programmatic focus of the journal Climatic Change, 1977-2013 (2016) 0.01

0.0056670653 = product of:
  0.017001195 = sum of:
    0.017001195 = product of:
      0.03400239 = sum of:
        0.03400239 = weight(_text_:22 in 3089) [ClassicSimilarity], result of:
          0.03400239 = score(doc=3089,freq=2.0), product of:
            0.17576782 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05019314 = queryNorm
            0.19345059 = fieldWeight in 3089, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0390625 = fieldNorm(doc=3089)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)

Date: 24. 8.2016 17:53:22

Leydesdorff, L.; Johnson, M.W.; Ivanova, I.: Toward a calculus of redundancy : signification, codification, and anticipation in cultural evolution (2018) 0.01

0.0056670653 = product of:
  0.017001195 = sum of:
    0.017001195 = product of:
      0.03400239 = sum of:
        0.03400239 = weight(_text_:22 in 4463) [ClassicSimilarity], result of:
          0.03400239 = score(doc=4463,freq=2.0), product of:
            0.17576782 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.05019314 = queryNorm
            0.19345059 = fieldWeight in 4463, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4463)
      0.5 = coord(1/2)
  0.33333334 = coord(1/3)

Date: 29. 9.2018 11:22:09

Search (10 results, page 1 of 1)

Authors

Years

Themes