-
Leydesdorff, L.: ¬The construction and globalization of the knowledge base in inter-human communication systems (2003)
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- Abstract
- The relationship between the "knowledge base" and the "globalization" of communication systems is discussed from the perspective of communication theory. I argue that inter-human communication takes place at two levels. At the first level information is exchanged and provided with meaning and at the second level meaning can reflexively be communicated. Human language can be considered as the evolutionary achievement which enables us to use these two channels of communication simultaneously. Providing meaning with hindsight is a recursive operation: a meaning that makes a difference can be considered as knowledge. If the production of knowledge is socially organized, the perspective of hindsight can further be codified. This adds globalization to the historically stabilized patterns of communications. Globalization can be expected to transform the communications in an evolutionary mode. However, the self-organization of a knowledge-based society remains an expectation with the status of a hypothesis.
- Date
- 22. 5.2003 19:48:04
-
Leydesdorff, L.; Sun, Y.: National and international dimensions of the Triple Helix in Japan : university-industry-government versus international coauthorship relations (2009)
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- Date
- 22. 3.2009 19:07:20
- Source
- Journal of the American Society for Information Science and Technology. 60(2009) no.4, S.778-788
-
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)
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- Date
- 22. 1.2011 12:51:07
- Source
- Journal of the American Society for Information Science and Technology. 62(2011) no.2, S.217-229
-
Leydesdorff, L.: Should co-occurrence data be normalized : a rejoinder (2007)
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- Source
- Journal of the American Society for Information Science and Technology. 58(2007) no.14, S.2411-2413
-
Leydesdorff, L.: Accounting for the uncertainty in the evaluation of percentile ranks (2012)
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- Source
- Journal of the American Society for Information Science and Technology. 63(2012) no.11, S.2349-2350
-
Bornmann, L.; Leydesdorff, L.: Statistical tests and research assessments : a comment on Schneider (2012) (2013)
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- Source
- Journal of the American Society for Information Science and Technology. 64(2013) no.6, S.1306-1308
-
Leydesdorff, L.; Bensman, S.: Classification and Powerlaws : the logarithmic transformation (2006)
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- Abstract
- Logarithmic transformation of the data has been recommended by the literature in the case of highly skewed distributions such as those commonly found in information science. The purpose of the transformation is to make the data conform to the lognormal law of error for inferential purposes. How does this transformation affect the analysis? We factor analyze and visualize the citation environment of the Journal of the American Chemical Society (JACS) before and after a logarithmic transformation. The transformation strongly reduces the variance necessary for classificatory purposes and therefore is counterproductive to the purposes of the descriptive statistics. We recommend against the logarithmic transformation when sets cannot be defined unambiguously. The intellectual organization of the sciences is reflected in the curvilinear parts of the citation distributions while negative powerlaws fit excellently to the tails of the distributions.
- Source
- Journal of the American Society for Information Science and Technology. 57(2006) no.11, S.1470-1486
-
Leydesdorff, L.; Heimeriks, G.: ¬The self-organization of the European information society : the case of "biotechnology" (2001)
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- Source
- Journal of the American Society for Information Science and technology. 52(2001) no.14, S.1262-1274
-
Leydesdorff, L.; Bornmann, L.: Integrated impact indicators compared with impact factors : an alternative research design with policy implications (2011)
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- Abstract
- In bibliometrics, the association of "impact" with central-tendency statistics is mistaken. Impacts add up, and citation curves therefore should be integrated instead of averaged. For example, the journals MIS Quarterly and Journal of the American Society for Information Science and Technology differ by a factor of 2 in terms of their respective impact factors (IF), but the journal with the lower IF has the higher impact. Using percentile ranks (e.g., top-1%, top-10%, etc.), an Integrated Impact Indicator (I3) can be based on integration of the citation curves, but after normalization of the citation curves to the same scale. The results across document sets can be compared as percentages of the total impact of a reference set. Total number of citations, however, should not be used instead because the shape of the citation curves is then not appreciated. I3 can be applied to any document set and any citation window. The results of the integration (summation) are fully decomposable in terms of journals or institutional units such as nations, universities, and so on because percentile ranks are determined at the paper level. In this study, we first compare I3 with IFs for the journals in two Institute for Scientific Information subject categories ("Information Science & Library Science" and "Multidisciplinary Sciences"). The library and information science set is additionally decomposed in terms of nations. Policy implications of this possible paradigm shift in citation impact analysis are specified.
- Source
- Journal of the American Society for Information Science and Technology. 62(2011) no.11, S.2133-2146
-
Leydesdorff, L.: Dynamic and evolutionary updates of classificatory schemes in scientific journal structures (2002)
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- Source
- Journal of the American Society for Information Science and technology. 53(2002) no.12, S.987-994
-
Leydesdorff, L.: Similarity measures, author cocitation Analysis, and information theory (2005)
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- Source
- Journal of the American Society for Information Science and Technology. 56(2005) no.7, S.769-772
-
Leydesdorff, L.; Zhou, P.: Co-word analysis using the Chinese character set (2008)
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- Source
- Journal of the American Society for Information Science and Technology. 59(2008) no.9, S.1528-1530
-
Leydesdorff, L.; Shin, J.C.: How to evaluate universities in terms of their relative citation impacts : fractional counting of citations and the normalization of differences among disciplines (2011)
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- Source
- Journal of the American Society for Information Science and Technology. 62(2011) no.6, S.1146-1155
-
Leydesdorff, L.: Can networks of journal-journal citations be used as indicators of change in the social sciences? (2003)
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- Date
- 6.11.2005 19:02:22
-
Leydesdorff, L.; Bornmann, L.; Wagner, C.S.: ¬The relative influences of government funding and international collaboration on citation impact (2019)
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- Date
- 8. 1.2019 18:22:45
-
Leydesdorff, L.: Why words and co-word cannot map the development of the science (1997)
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- Source
- Journal of the American Society for Information Science. 48(1997) no.5, S.418-427
-
Leydesdorff, L.: ¬A sociological theory of communication : the self-organization of the knowledge-based society (2001)
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-
Leydesdorff, L.: ¬The university-industry knowledge relationship : analyzing patents and the science base of technologies (2004)
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- Source
- Journal of the American Society for Information Science and Technology. 55(2004) no.11, S.991-1001
-
Leydesdorff, L.; Bihui, J.: Mapping the Chinese Science Citation Database in terms of aggregated journal-journal citation relations (2005)
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- Source
- Journal of the American Society for Information Science and Technology. 56(2005) no.14, S.1469-1479
-
Leydesdorff, L.: Can scientific journals be classified in terms of aggregated journal-journal citation relations using the Journal Citation Reports? (2006)
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- Source
- Journal of the American Society for Information Science and Technology. 57(2006) no.5, S.601-613
