-
Leydesdorff, L.; Zhou, P.: Co-word analysis using the Chinese character set (2008)
0.04
0.040694006 = product of:
0.08138801 = sum of:
0.08138801 = product of:
0.16277602 = sum of:
0.16277602 = weight(_text_:spaces in 1970) [ClassicSimilarity], result of:
0.16277602 = score(doc=1970,freq=2.0), product of:
0.32442674 = queryWeight, product of:
6.487401 = idf(docFreq=182, maxDocs=44218)
0.05000874 = queryNorm
0.5017343 = fieldWeight in 1970, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.487401 = idf(docFreq=182, maxDocs=44218)
0.0546875 = fieldNorm(doc=1970)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Until recently, Chinese texts could not be studied using co-word analysis because the words are not separated by spaces in Chinese (and Japanese). A word can be composed of one or more characters. The online availability of programs that separate Chinese texts makes it possible to analyze them using semantic maps. Chinese characters contain not only information but also meaning. This may enhance the readability of semantic maps. In this study, we analyze 58 words which occur 10 or more times in the 1,652 journal titles of the China Scientific and Technical Papers and Citations Database. The word-occurrence matrix is visualized and factor-analyzed.
-
Rotolo, D.; Rafols, I.; Hopkins, M.M.; Leydesdorff, L.: Strategic intelligence on emerging technologies : scientometric overlay mapping (2017)
0.03
0.034880575 = product of:
0.06976115 = sum of:
0.06976115 = product of:
0.1395223 = sum of:
0.1395223 = weight(_text_:spaces in 3322) [ClassicSimilarity], result of:
0.1395223 = score(doc=3322,freq=2.0), product of:
0.32442674 = queryWeight, product of:
6.487401 = idf(docFreq=182, maxDocs=44218)
0.05000874 = queryNorm
0.43005797 = fieldWeight in 3322, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
6.487401 = idf(docFreq=182, maxDocs=44218)
0.046875 = fieldNorm(doc=3322)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This paper examines the use of scientometric overlay mapping as a tool of "strategic intelligence" to aid the governing of emerging technologies. We develop an integrative synthesis of different overlay mapping techniques and associated perspectives on technological emergence across geographical, social, and cognitive spaces. To do so, we longitudinally analyze (with publication and patent data) three case studies of emerging technologies in the medical domain. These are RNA interference (RNAi), human papillomavirus (HPV) testing technologies for cervical cancer, and thiopurine methyltransferase (TPMT) genetic testing. Given the flexibility (i.e., adaptability to different sources of data) and granularity (i.e., applicability across multiple levels of data aggregation) of overlay mapping techniques, we argue that these techniques can favor the integration and comparison of results from different contexts and cases, thus potentially functioning as a platform for "distributed" strategic intelligence for analysts and decision makers.
-
Leydesdorff, L.: ¬The construction and globalization of the knowledge base in inter-human communication systems (2003)
0.01
0.01016324 = product of:
0.02032648 = sum of:
0.02032648 = product of:
0.04065296 = sum of:
0.04065296 = weight(_text_:22 in 1621) [ClassicSimilarity], result of:
0.04065296 = score(doc=1621,freq=2.0), product of:
0.17512208 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05000874 = 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)
0.5 = coord(1/2)
- 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
0.01016324 = product of:
0.02032648 = sum of:
0.02032648 = product of:
0.04065296 = sum of:
0.04065296 = weight(_text_:22 in 4460) [ClassicSimilarity], result of:
0.04065296 = score(doc=4460,freq=2.0), product of:
0.17512208 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05000874 = 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)
0.5 = coord(1/2)
- 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
0.01016324 = product of:
0.02032648 = sum of:
0.02032648 = product of:
0.04065296 = sum of:
0.04065296 = weight(_text_:22 in 2761) [ClassicSimilarity], result of:
0.04065296 = score(doc=2761,freq=2.0), product of:
0.17512208 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05000874 = 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)
0.5 = coord(1/2)
- 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
0.01016324 = product of:
0.02032648 = sum of:
0.02032648 = product of:
0.04065296 = sum of:
0.04065296 = weight(_text_:22 in 4681) [ClassicSimilarity], result of:
0.04065296 = score(doc=4681,freq=2.0), product of:
0.17512208 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05000874 = 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
0.008469367 = product of:
0.016938735 = sum of:
0.016938735 = product of:
0.03387747 = sum of:
0.03387747 = weight(_text_:22 in 4186) [ClassicSimilarity], result of:
0.03387747 = score(doc=4186,freq=2.0), product of:
0.17512208 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05000874 = 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
-
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
0.008469367 = product of:
0.016938735 = sum of:
0.016938735 = product of:
0.03387747 = sum of:
0.03387747 = weight(_text_:22 in 3089) [ClassicSimilarity], result of:
0.03387747 = score(doc=3089,freq=2.0), product of:
0.17512208 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05000874 = 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)
0.5 = coord(1/2)
- 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
0.008469367 = product of:
0.016938735 = sum of:
0.016938735 = product of:
0.03387747 = sum of:
0.03387747 = weight(_text_:22 in 4463) [ClassicSimilarity], result of:
0.03387747 = score(doc=4463,freq=2.0), product of:
0.17512208 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05000874 = 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
