-
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)
0.06
0.057619434 = product of:
0.11523887 = sum of:
0.11523887 = sum of:
0.08078188 = weight(_text_:policy in 3089) [ClassicSimilarity], result of:
0.08078188 = score(doc=3089,freq=2.0), product of:
0.2727254 = queryWeight, product of:
5.361833 = idf(docFreq=563, maxDocs=44218)
0.05086421 = queryNorm
0.29620224 = fieldWeight in 3089, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.361833 = idf(docFreq=563, maxDocs=44218)
0.0390625 = fieldNorm(doc=3089)
0.03445699 = weight(_text_:22 in 3089) [ClassicSimilarity], result of:
0.03445699 = score(doc=3089,freq=2.0), product of:
0.1781178 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05086421 = 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)
- Abstract
- Climate change as a complex physical and social issue has gained increasing attention in the natural as well as the social sciences. Climate change research has become more interdisciplinary and even transdisciplinary as a typical Mode-2 science that is also dependent on an application context for its further development. We propose to approach interdisciplinarity as a co-construction of the knowledge base in the reference patterns and the programmatic focus in the editorials in the core journal of the climate-change sciences-Climatic Change-during the period 1977-2013. First, we analyze the knowledge base of the journal and map journal-journal relations on the basis of the references in the articles. Second, we follow the development of the programmatic focus by analyzing the semantics in the editorials. We argue that interdisciplinarity is a result of the co-construction between different agendas: The selection of publications into the knowledge base of the journal, and the adjustment of the programmatic focus to the political context in the editorials. Our results show a widening of the knowledge base from referencing the multidisciplinary journals Nature and Science to citing journals from specialist fields. The programmatic focus follows policy-oriented issues and incorporates public metaphors.
- Date
- 24. 8.2016 17:53:22
-
Leydesdorff, L.; Bornmann, L.: Integrated impact indicators compared with impact factors : an alternative research design with policy implications (2011)
0.03
0.028560705 = product of:
0.05712141 = sum of:
0.05712141 = product of:
0.11424282 = sum of:
0.11424282 = weight(_text_:policy in 4919) [ClassicSimilarity], result of:
0.11424282 = score(doc=4919,freq=4.0), product of:
0.2727254 = queryWeight, product of:
5.361833 = idf(docFreq=563, maxDocs=44218)
0.05086421 = queryNorm
0.41889322 = fieldWeight in 4919, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
5.361833 = idf(docFreq=563, maxDocs=44218)
0.0390625 = fieldNorm(doc=4919)
0.5 = coord(1/2)
0.5 = coord(1/2)
- 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.
-
Zhou, P.; Su, X.; Leydesdorff, L.: ¬A comparative study on communication structures of Chinese journals in the social sciences (2010)
0.02
0.024234561 = product of:
0.048469122 = sum of:
0.048469122 = product of:
0.096938245 = sum of:
0.096938245 = weight(_text_:policy in 3580) [ClassicSimilarity], result of:
0.096938245 = score(doc=3580,freq=2.0), product of:
0.2727254 = queryWeight, product of:
5.361833 = idf(docFreq=563, maxDocs=44218)
0.05086421 = queryNorm
0.35544267 = fieldWeight in 3580, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.361833 = idf(docFreq=563, maxDocs=44218)
0.046875 = fieldNorm(doc=3580)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- We argue that the communication structures in the Chinese social sciences have not yet been sufficiently reformed. Citation patterns among Chinese domestic journals in three subject areas - political science and Marxism, library and information science, and economics - are compared with their counterparts internationally. Like their colleagues in the natural and life sciences, Chinese scholars in the social sciences provide fewer references to journal publications than their international counterparts; like their international colleagues, social scientists provide fewer references than natural sciences. The resulting citation networks, therefore, are sparse. Nevertheless, the citation structures clearly suggest that the Chinese social sciences are far less specialized in terms of disciplinary delineations than their international counterparts. Marxism studies are more established than political science in China. In terms of the impact of the Chinese political system on academic fields, disciplines closely related to the political system are less specialized than those weakly related. In the discussion section, we explore reasons that may cause the current stagnation and provide policy recommendations.
-
Rafols, I.; Porter, A.L.; Leydesdorff, L.: Science overlay maps : a new tool for research policy and library management (2010)
0.02
0.024234561 = product of:
0.048469122 = sum of:
0.048469122 = product of:
0.096938245 = sum of:
0.096938245 = weight(_text_:policy in 3987) [ClassicSimilarity], result of:
0.096938245 = score(doc=3987,freq=2.0), product of:
0.2727254 = queryWeight, product of:
5.361833 = idf(docFreq=563, maxDocs=44218)
0.05086421 = queryNorm
0.35544267 = fieldWeight in 3987, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.361833 = idf(docFreq=563, maxDocs=44218)
0.046875 = fieldNorm(doc=3987)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Leydesdorff, L.; Bornmann, L.; Wagner, C.S.: ¬The relative influences of government funding and international collaboration on citation impact (2019)
0.01
0.010337097 = product of:
0.020674193 = sum of:
0.020674193 = product of:
0.041348387 = sum of:
0.041348387 = weight(_text_:22 in 4681) [ClassicSimilarity], result of:
0.041348387 = score(doc=4681,freq=2.0), product of:
0.1781178 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05086421 = 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)
0.5 = coord(1/2)
- 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
0.008614248 = product of:
0.017228495 = sum of:
0.017228495 = product of:
0.03445699 = sum of:
0.03445699 = weight(_text_:22 in 4186) [ClassicSimilarity], result of:
0.03445699 = score(doc=4186,freq=2.0), product of:
0.1781178 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05086421 = 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)
0.5 = coord(1/2)
- Date
- 22. 1.2011 12:51:07
-
Leydesdorff, L.; Johnson, M.W.; Ivanova, I.: Toward a calculus of redundancy : signification, codification, and anticipation in cultural evolution (2018)
0.01
0.008614248 = product of:
0.017228495 = sum of:
0.017228495 = product of:
0.03445699 = sum of:
0.03445699 = weight(_text_:22 in 4463) [ClassicSimilarity], result of:
0.03445699 = score(doc=4463,freq=2.0), product of:
0.1781178 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05086421 = 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)
0.5 = coord(1/2)
- Date
- 29. 9.2018 11:22:09
