-
Leydesdorff, L.; Bornmann, L.; Mingers, J.: Statistical significance and effect sizes of differences among research universities at the level of nations and worldwide based on the Leiden rankings (2019)
0.00
0.0030473555 = product of:
0.04723401 = sum of:
0.0024444978 = weight(_text_:e in 5225) [ClassicSimilarity], result of:
0.0024444978 = score(doc=5225,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.07940422 = fieldWeight in 5225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=5225)
0.04478951 = product of:
0.08957902 = sum of:
0.08957902 = weight(_text_:eco in 5225) [ClassicSimilarity], result of:
0.08957902 = score(doc=5225,freq=2.0), product of:
0.18636073 = queryWeight, product of:
8.701155 = idf(docFreq=19, maxDocs=44218)
0.02141793 = queryNorm
0.48067543 = fieldWeight in 5225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
8.701155 = idf(docFreq=19, maxDocs=44218)
0.0390625 = fieldNorm(doc=5225)
0.5 = coord(1/2)
0.06451613 = coord(2/31)
- Abstract
- The Leiden Rankings can be used for grouping research universities by considering universities which are not statistically significantly different as homogeneous sets. The groups and intergroup relations can be analyzed and visualized using tools from network analysis. Using the so-called "excellence indicator" PPtop-10%-the proportion of the top-10% most-highly-cited papers assigned to a university-we pursue a classification using (a) overlapping stability intervals, (b) statistical-significance tests, and (c) effect sizes of differences among 902 universities in 54 countries; we focus on the UK, Germany, Brazil, and the USA as national examples. Although the groupings remain largely the same using different statistical significance levels or overlapping stability intervals, these classifications are uncorrelated with those based on effect sizes. Effect sizes for the differences between universities are small (w < .2). The more detailed analysis of universities at the country level suggests that distinctions beyond three or perhaps four groups of universities (high, middle, low) may not be meaningful. Given similar institutional incentives, isomorphism within each eco-system of universities should not be underestimated. Our results suggest that networks based on overlapping stability intervals can provide a first impression of the relevant groupings among universities. However, the clusters are not well-defined divisions between groups of universities.
- Language
- e
-
Leydesdorff, L.: Can networks of journal-journal citations be used as indicators of change in the social sciences? (2003)
0.00
0.0021645578 = product of:
0.022367097 = sum of:
0.010728197 = weight(_text_:20 in 4460) [ClassicSimilarity], result of:
0.010728197 = score(doc=4460,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.18222281 = fieldWeight in 4460, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.046875 = fieldNorm(doc=4460)
0.0029333972 = weight(_text_:e in 4460) [ClassicSimilarity], result of:
0.0029333972 = score(doc=4460,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 4460, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=4460)
0.008705502 = product of:
0.017411005 = sum of:
0.017411005 = weight(_text_:22 in 4460) [ClassicSimilarity], result of:
0.017411005 = score(doc=4460,freq=2.0), product of:
0.07500195 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02141793 = 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)
0.09677419 = coord(3/31)
- Date
- 10. 3.1997 20:31:13
6.11.2005 19:02:22
- Language
- e
-
Leydesdorff, L.; Sun, Y.: National and international dimensions of the Triple Helix in Japan : university-industry-government versus international coauthorship relations (2009)
0.00
0.0021645578 = product of:
0.022367097 = sum of:
0.010728197 = weight(_text_:20 in 2761) [ClassicSimilarity], result of:
0.010728197 = score(doc=2761,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.18222281 = fieldWeight in 2761, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.046875 = fieldNorm(doc=2761)
0.0029333972 = weight(_text_:e in 2761) [ClassicSimilarity], result of:
0.0029333972 = score(doc=2761,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 2761, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=2761)
0.008705502 = product of:
0.017411005 = sum of:
0.017411005 = weight(_text_:22 in 2761) [ClassicSimilarity], result of:
0.017411005 = score(doc=2761,freq=2.0), product of:
0.07500195 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02141793 = 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)
0.09677419 = coord(3/31)
- Date
- 22. 3.2009 19:07:20
- Language
- e
-
Leydesdorff, L.; Johnson, M.W.; Ivanova, I.: Toward a calculus of redundancy : signification, codification, and anticipation in cultural evolution (2018)
0.00
0.0016470503 = product of:
0.01701952 = sum of:
0.0024444978 = weight(_text_:e in 4463) [ClassicSimilarity], result of:
0.0024444978 = score(doc=4463,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.07940422 = fieldWeight in 4463, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=4463)
0.007320437 = product of:
0.014640874 = sum of:
0.014640874 = weight(_text_:29 in 4463) [ClassicSimilarity], result of:
0.014640874 = score(doc=4463,freq=2.0), product of:
0.07534158 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.02141793 = queryNorm
0.19432661 = fieldWeight in 4463, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0390625 = fieldNorm(doc=4463)
0.5 = coord(1/2)
0.007254585 = product of:
0.01450917 = sum of:
0.01450917 = weight(_text_:22 in 4463) [ClassicSimilarity], result of:
0.01450917 = score(doc=4463,freq=2.0), product of:
0.07500195 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02141793 = 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)
0.09677419 = coord(3/31)
- Date
- 29. 9.2018 11:22:09
- Language
- e
-
Leydesdorff, L.; Zhou, P.: Co-word analysis using the Chinese character set (2008)
0.00
8.819941E-4 = product of:
0.013670908 = sum of:
0.0034222968 = weight(_text_:e in 1970) [ClassicSimilarity], result of:
0.0034222968 = score(doc=1970,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.1111659 = fieldWeight in 1970, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0546875 = fieldNorm(doc=1970)
0.010248612 = product of:
0.020497223 = sum of:
0.020497223 = weight(_text_:29 in 1970) [ClassicSimilarity], result of:
0.020497223 = score(doc=1970,freq=2.0), product of:
0.07534158 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.02141793 = queryNorm
0.27205724 = fieldWeight in 1970, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0546875 = fieldNorm(doc=1970)
0.5 = coord(1/2)
0.06451613 = coord(2/31)
- Date
- 12. 7.2008 18:46:29
- Language
- e
-
Leydesdorff, L.: Clusters and maps of science journals based on bi-connected graphs in Journal Citation Reports (2004)
0.00
8.8139315E-4 = product of:
0.013661594 = sum of:
0.010728197 = weight(_text_:20 in 4427) [ClassicSimilarity], result of:
0.010728197 = score(doc=4427,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.18222281 = fieldWeight in 4427, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.046875 = fieldNorm(doc=4427)
0.0029333972 = weight(_text_:e in 4427) [ClassicSimilarity], result of:
0.0029333972 = score(doc=4427,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 4427, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=4427)
0.06451613 = coord(2/31)
- Date
- 10. 3.1997 20:31:13
- Language
- e
-
Egghe, L.; Leydesdorff, L.: ¬The relation between Pearson's correlation coefficient r and Salton's cosine measure (2009)
0.00
8.8139315E-4 = product of:
0.013661594 = sum of:
0.010728197 = weight(_text_:20 in 2803) [ClassicSimilarity], result of:
0.010728197 = score(doc=2803,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.18222281 = fieldWeight in 2803, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.046875 = fieldNorm(doc=2803)
0.0029333972 = weight(_text_:e in 2803) [ClassicSimilarity], result of:
0.0029333972 = score(doc=2803,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 2803, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=2803)
0.06451613 = coord(2/31)
- Date
- 18. 4.2009 20:54:30
- Language
- e
-
Leydesdorff, L.: How are new citation-based journal indicators adding to the bibliometric toolbox? (2009)
0.00
8.8139315E-4 = product of:
0.013661594 = sum of:
0.010728197 = weight(_text_:20 in 2929) [ClassicSimilarity], result of:
0.010728197 = score(doc=2929,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.18222281 = fieldWeight in 2929, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.046875 = fieldNorm(doc=2929)
0.0029333972 = weight(_text_:e in 2929) [ClassicSimilarity], result of:
0.0029333972 = score(doc=2929,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 2929, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=2929)
0.06451613 = coord(2/31)
- Date
- 19. 7.2009 12:23:20
- Language
- e
-
Leydesdorff, L.; Opthof, T.: Citation analysis with medical subject Headings (MeSH) using the Web of Knowledge : a new routine (2013)
0.00
8.8139315E-4 = product of:
0.013661594 = sum of:
0.010728197 = weight(_text_:20 in 943) [ClassicSimilarity], result of:
0.010728197 = score(doc=943,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.18222281 = fieldWeight in 943, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.046875 = fieldNorm(doc=943)
0.0029333972 = weight(_text_:e in 943) [ClassicSimilarity], result of:
0.0029333972 = score(doc=943,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 943, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=943)
0.06451613 = coord(2/31)
- Date
- 20. 4.2013 18:25:05
- Language
- e
-
Ye, F.Y.; Yu, S.S.; Leydesdorff, L.: ¬The Triple Helix of university-industry-government relations at the country level and its dynamic evolution under the pressures of globalization (2013)
0.00
8.8139315E-4 = product of:
0.013661594 = sum of:
0.010728197 = weight(_text_:20 in 1110) [ClassicSimilarity], result of:
0.010728197 = score(doc=1110,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.18222281 = fieldWeight in 1110, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.046875 = fieldNorm(doc=1110)
0.0029333972 = weight(_text_:e in 1110) [ClassicSimilarity], result of:
0.0029333972 = score(doc=1110,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 1110, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=1110)
0.06451613 = coord(2/31)
- Date
- 29.10.2013 20:28:15
- Language
- e
-
Leydesdorff, L.; Goldstone, R.L.: Interdisciplinarity at the journal and specialty level : the changing knowledge bases of the journal cognitive science (2014)
0.00
8.8139315E-4 = product of:
0.013661594 = sum of:
0.010728197 = weight(_text_:20 in 1187) [ClassicSimilarity], result of:
0.010728197 = score(doc=1187,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.18222281 = fieldWeight in 1187, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.046875 = fieldNorm(doc=1187)
0.0029333972 = weight(_text_:e in 1187) [ClassicSimilarity], result of:
0.0029333972 = score(doc=1187,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 1187, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=1187)
0.06451613 = coord(2/31)
- Date
- 26. 1.2014 20:36:28
- Language
- e
-
Lucio-Arias, D.; Leydesdorff, L.: ¬An indicator of research front activity : measuring intellectual organization as uncertainty reduction in document sets (2009)
0.00
8.256231E-4 = product of:
0.012797158 = sum of:
0.0024444978 = weight(_text_:e in 3297) [ClassicSimilarity], result of:
0.0024444978 = score(doc=3297,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.07940422 = fieldWeight in 3297, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=3297)
0.010352661 = product of:
0.020705322 = sum of:
0.020705322 = weight(_text_:29 in 3297) [ClassicSimilarity], result of:
0.020705322 = score(doc=3297,freq=4.0), product of:
0.07534158 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.02141793 = queryNorm
0.2748193 = fieldWeight in 3297, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0390625 = fieldNorm(doc=3297)
0.5 = coord(1/2)
0.06451613 = coord(2/31)
- Date
- 2. 2.2010 19:29:29
- Language
- e
-
Leydesdorff, L.: ¬The construction and globalization of the knowledge base in inter-human communication systems (2003)
0.00
7.508967E-4 = product of:
0.011638899 = sum of:
0.0029333972 = weight(_text_:e in 1621) [ClassicSimilarity], result of:
0.0029333972 = score(doc=1621,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 1621, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=1621)
0.008705502 = product of:
0.017411005 = sum of:
0.017411005 = weight(_text_:22 in 1621) [ClassicSimilarity], result of:
0.017411005 = score(doc=1621,freq=2.0), product of:
0.07500195 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02141793 = 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)
0.06451613 = coord(2/31)
- Date
- 22. 5.2003 19:48:04
- Language
- e
-
Leydesdorff, L.; Bornmann, L.; Wagner, C.S.: ¬The relative influences of government funding and international collaboration on citation impact (2019)
0.00
7.508967E-4 = product of:
0.011638899 = sum of:
0.0029333972 = weight(_text_:e in 4681) [ClassicSimilarity], result of:
0.0029333972 = score(doc=4681,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.09528506 = fieldWeight in 4681, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.046875 = fieldNorm(doc=4681)
0.008705502 = product of:
0.017411005 = sum of:
0.017411005 = weight(_text_:22 in 4681) [ClassicSimilarity], result of:
0.017411005 = score(doc=4681,freq=2.0), product of:
0.07500195 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.02141793 = 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)
0.06451613 = coord(2/31)
- Date
- 8. 1.2019 18:22:45
- Language
- e
-
Leydesdorff, L.; Heimeriks, G.: ¬The self-organization of the European information society : the case of "biotechnology" (2001)
0.00
7.344943E-4 = product of:
0.011384662 = sum of:
0.008940164 = weight(_text_:20 in 6524) [ClassicSimilarity], result of:
0.008940164 = score(doc=6524,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.15185234 = fieldWeight in 6524, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.0390625 = fieldNorm(doc=6524)
0.0024444978 = weight(_text_:e in 6524) [ClassicSimilarity], result of:
0.0024444978 = score(doc=6524,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.07940422 = fieldWeight in 6524, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=6524)
0.06451613 = coord(2/31)
- Date
- 11. 1.2003 20:01:15
- Language
- e
-
Leydesdorff, L.; Zhou, P.; Bornmann, L.: How can journal impact factors be normalized across fields of science? : An assessment in terms of percentile ranks and fractional counts (2013)
0.00
7.344943E-4 = product of:
0.011384662 = sum of:
0.008940164 = weight(_text_:20 in 532) [ClassicSimilarity], result of:
0.008940164 = score(doc=532,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.15185234 = fieldWeight in 532, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.0390625 = fieldNorm(doc=532)
0.0024444978 = weight(_text_:e in 532) [ClassicSimilarity], result of:
0.0024444978 = score(doc=532,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.07940422 = fieldWeight in 532, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=532)
0.06451613 = coord(2/31)
- Date
- 27.12.2012 20:44:36
- Language
- e
-
Leydesdorff, L.; Ahrweiler, P.: In search of a network theory of innovations : relations, positions, and perspectives (2014)
0.00
7.344943E-4 = product of:
0.011384662 = sum of:
0.008940164 = weight(_text_:20 in 1531) [ClassicSimilarity], result of:
0.008940164 = score(doc=1531,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.15185234 = fieldWeight in 1531, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.0390625 = fieldNorm(doc=1531)
0.0024444978 = weight(_text_:e in 1531) [ClassicSimilarity], result of:
0.0024444978 = score(doc=1531,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.07940422 = fieldWeight in 1531, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=1531)
0.06451613 = coord(2/31)
- Date
- 26.10.2014 20:25:43
- Language
- e
-
Hellsten, I.; Leydesdorff, L.: Automated analysis of actor-topic networks on twitter : new approaches to the analysis of socio-semantic networks (2020)
0.00
7.344943E-4 = product of:
0.011384662 = sum of:
0.008940164 = weight(_text_:20 in 5610) [ClassicSimilarity], result of:
0.008940164 = score(doc=5610,freq=2.0), product of:
0.05887406 = queryWeight, product of:
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.02141793 = queryNorm
0.15185234 = fieldWeight in 5610, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.748821 = idf(docFreq=7692, maxDocs=44218)
0.0390625 = fieldNorm(doc=5610)
0.0024444978 = weight(_text_:e in 5610) [ClassicSimilarity], result of:
0.0024444978 = score(doc=5610,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.07940422 = fieldWeight in 5610, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=5610)
0.06451613 = coord(2/31)
- Abstract
- Social media data provide increasing opportunities for the automated analysis of large sets of textual documents. So far, automated tools have been developed either to account for the social networks among participants in the debates, or to analyze the content of these debates. Less attention has been paid to mapping co-occurrences of actors (participants) and topics (content) in online debates that can be considered as socio-semantic networks. We propose a new, automated approach that uses the whole matrix of co-addressed topics and actors for understanding and visualizing online debates. We show the advantages of the new approach with the analysis of two data sets: first, a large set of English-language Twitter messages at the Rio?+?20 meeting, in June 2012 (72,077 tweets), and second, a smaller data set of Dutch-language Twitter messages on bird flu related to poultry farming in 2015-2017 (2,139 tweets). We discuss the theoretical, methodological, and substantive implications of our approach, also for the analysis of other social media data.
- Language
- e
-
Leydesdorff, L.; Ivanova, I.A.: Mutual redundancies in interhuman communication systems : steps toward a calculus of processing meaning (2014)
0.00
6.953212E-4 = product of:
0.010777479 = sum of:
0.003457042 = weight(_text_:e in 1211) [ClassicSimilarity], result of:
0.003457042 = score(doc=1211,freq=4.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.112294525 = fieldWeight in 1211, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=1211)
0.007320437 = product of:
0.014640874 = sum of:
0.014640874 = weight(_text_:29 in 1211) [ClassicSimilarity], result of:
0.014640874 = score(doc=1211,freq=2.0), product of:
0.07534158 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.02141793 = queryNorm
0.19432661 = fieldWeight in 1211, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0390625 = fieldNorm(doc=1211)
0.5 = coord(1/2)
0.06451613 = coord(2/31)
- Abstract
- The study of interhuman communication requires a more complex framework than Claude E. Shannon's (1948) mathematical theory of communication because "information" is defined in the latter case as meaningless uncertainty. Assuming that meaning cannot be communicated, we extend Shannon's theory by defining mutual redundancy as a positional counterpart of the relational communication of information. Mutual redundancy indicates the surplus of meanings that can be provided to the exchanges in reflexive communications. The information is redundant because it is based on "pure sets" (i.e., without subtraction of mutual information in the overlaps). We show that in the three-dimensional case (e.g., of a triple helix of university-industry-government relations), mutual redundancy is equal to mutual information (Rxyz = Txyz); but when the dimensionality is even, the sign is different. We generalize to the measurement in N dimensions and proceed to the interpretation. Using Niklas Luhmann's (1984-1995) social systems theory and/or Anthony Giddens's (1979, 1984) structuration theory, mutual redundancy can be provided with an interpretation in the sociological case: Different meaning-processing structures code and decode with other algorithms. A surplus of ("absent") options can then be generated that add to the redundancy. Luhmann's "functional (sub)systems" of expectations or Giddens's "rule-resource sets" are positioned mutually, but coupled operationally in events or "instantiated" in actions. Shannon-type information is generated by the mediation, but the "structures" are (re-)positioned toward one another as sets of (potentially counterfactual) expectations. The structural differences among the coding and decoding algorithms provide a source of additional options in reflexive and anticipatory communications.
- Date
- 29. 1.2014 16:44:54
- Language
- e
-
Chen, C.; Leydesdorff, L.: Patterns of connections and movements in dual-map overlays : a new method of publication portfolio analysis (2014)
0.00
6.299958E-4 = product of:
0.009764935 = sum of:
0.0024444978 = weight(_text_:e in 1200) [ClassicSimilarity], result of:
0.0024444978 = score(doc=1200,freq=2.0), product of:
0.03078549 = queryWeight, product of:
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.02141793 = queryNorm
0.07940422 = fieldWeight in 1200, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
1.43737 = idf(docFreq=28552, maxDocs=44218)
0.0390625 = fieldNorm(doc=1200)
0.007320437 = product of:
0.014640874 = sum of:
0.014640874 = weight(_text_:29 in 1200) [ClassicSimilarity], result of:
0.014640874 = score(doc=1200,freq=2.0), product of:
0.07534158 = queryWeight, product of:
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.02141793 = queryNorm
0.19432661 = fieldWeight in 1200, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5176873 = idf(docFreq=3565, maxDocs=44218)
0.0390625 = fieldNorm(doc=1200)
0.5 = coord(1/2)
0.06451613 = coord(2/31)
- Date
- 29. 1.2014 16:38:28
- Language
- e
