-
Chen, C.: CiteSpace II : detecting and visualizing emerging trends and transient patterns in scientific literature (2006)
0.03
0.0329677 = sum of:
0.015122154 = product of:
0.060488615 = sum of:
0.060488615 = weight(_text_:authors in 5272) [ClassicSimilarity], result of:
0.060488615 = score(doc=5272,freq=2.0), product of:
0.24018547 = queryWeight, product of:
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.052685954 = queryNorm
0.25184128 = fieldWeight in 5272, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.558814 = idf(docFreq=1258, maxDocs=44218)
0.0390625 = fieldNorm(doc=5272)
0.25 = coord(1/4)
0.017845549 = product of:
0.035691097 = sum of:
0.035691097 = weight(_text_:22 in 5272) [ClassicSimilarity], result of:
0.035691097 = score(doc=5272,freq=2.0), product of:
0.18449724 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052685954 = queryNorm
0.19345059 = fieldWeight in 5272, 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=5272)
0.5 = coord(1/2)
- Abstract
- This article describes the latest development of a generic approach to detecting and visualizing emerging trends and transient patterns in scientific literature. The work makes substantial theoretical and methodological contributions to progressive knowledge domain visualization. A specialty is conceptualized and visualized as a time-variant duality between two fundamental concepts in information science: research fronts and intellectual bases. A research front is defined as an emergent and transient grouping of concepts and underlying research issues. The intellectual base of a research front is its citation and co-citation footprint in scientific literature - an evolving network of scientific publications cited by research-front concepts. Kleinberg's (2002) burst-detection algorithm is adapted to identify emergent research-front concepts. Freeman's (1979) betweenness centrality metric is used to highlight potential pivotal points of paradigm shift over time. Two complementary visualization views are designed and implemented: cluster views and time-zone views. The contributions of the approach are that (a) the nature of an intellectual base is algorithmically and temporally identified by emergent research-front terms, (b) the value of a co-citation cluster is explicitly interpreted in terms of research-front concepts, and (c) visually prominent and algorithmically detected pivotal points substantially reduce the complexity of a visualized network. The modeling and visualization process is implemented in CiteSpace II, a Java application, and applied to the analysis of two research fields: mass extinction (1981-2004) and terrorism (1990-2003). Prominent trends and pivotal points in visualized networks were verified in collaboration with domain experts, who are the authors of pivotal-point articles. Practical implications of the work are discussed. A number of challenges and opportunities for future studies are identified.
- Date
- 22. 7.2006 16:11:05
-
Chen, C.: Top Ten Problems in Visual Interfaces to Digital Libraries (2002)
0.03
0.030284902 = product of:
0.060569804 = sum of:
0.060569804 = product of:
0.12113961 = sum of:
0.12113961 = weight(_text_:22 in 4840) [ClassicSimilarity], result of:
0.12113961 = score(doc=4840,freq=4.0), product of:
0.18449724 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052685954 = queryNorm
0.6565931 = fieldWeight in 4840, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=4840)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 2.2003 17:25:39
22. 2.2003 18:13:11
-
Börner, K.; Chen, C.: Visual Interfaces to Digital Libraries : Motivation, Utilization, and Socio-technical Challenges (2002)
0.03
0.030284902 = product of:
0.060569804 = sum of:
0.060569804 = product of:
0.12113961 = sum of:
0.12113961 = weight(_text_:22 in 1359) [ClassicSimilarity], result of:
0.12113961 = score(doc=1359,freq=4.0), product of:
0.18449724 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052685954 = queryNorm
0.6565931 = fieldWeight in 1359, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=1359)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 2.2003 17:25:39
22. 2.2003 18:20:07
-
Liu, M.; Bu, Y.; Chen, C.; Xu, J.; Li, D.; Leng, Y.; Freeman, R.B.; Meyer, E.T.; Yoon, W.; Sung, M.; Jeong, M.; Lee, J.; Kang, J.; Min, C.; Zhai, Y.; Song, M.; Ding, Y.: Pandemics are catalysts of scientific novelty : evidence from COVID-19 (2022)
0.01
0.009011503 = product of:
0.018023007 = sum of:
0.018023007 = product of:
0.036046013 = sum of:
0.036046013 = weight(_text_:m in 633) [ClassicSimilarity], result of:
0.036046013 = score(doc=633,freq=8.0), product of:
0.13110629 = queryWeight, product of:
2.4884486 = idf(docFreq=9980, maxDocs=44218)
0.052685954 = queryNorm
0.27493733 = fieldWeight in 633, product of:
2.828427 = tf(freq=8.0), with freq of:
8.0 = termFreq=8.0
2.4884486 = idf(docFreq=9980, maxDocs=44218)
0.0390625 = fieldNorm(doc=633)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Liu, S.; Chen, C.: ¬The differences between latent topics in abstracts and citation contexts of citing papers (2013)
0.01
0.008922774 = product of:
0.017845549 = sum of:
0.017845549 = product of:
0.035691097 = sum of:
0.035691097 = weight(_text_:22 in 671) [ClassicSimilarity], result of:
0.035691097 = score(doc=671,freq=2.0), product of:
0.18449724 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.052685954 = queryNorm
0.19345059 = fieldWeight in 671, 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=671)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 3.2013 19:50:00
-
Chen, C.; Czerwinski, M.: Spatial ability and visual navigation : an empirical study (1997)
0.01
0.0054069017 = product of:
0.010813803 = sum of:
0.010813803 = product of:
0.021627607 = sum of:
0.021627607 = weight(_text_:m in 2914) [ClassicSimilarity], result of:
0.021627607 = score(doc=2914,freq=2.0), product of:
0.13110629 = queryWeight, product of:
2.4884486 = idf(docFreq=9980, maxDocs=44218)
0.052685954 = queryNorm
0.1649624 = fieldWeight in 2914, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4884486 = idf(docFreq=9980, maxDocs=44218)
0.046875 = fieldNorm(doc=2914)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Chen, C.; Czerwinski, M.; Macredie, R.: Individual differences in virtual environments : introduction and overview (2000)
0.00
0.0045057517 = product of:
0.009011503 = sum of:
0.009011503 = product of:
0.018023007 = sum of:
0.018023007 = weight(_text_:m in 4600) [ClassicSimilarity], result of:
0.018023007 = score(doc=4600,freq=2.0), product of:
0.13110629 = queryWeight, product of:
2.4884486 = idf(docFreq=9980, maxDocs=44218)
0.052685954 = queryNorm
0.13746867 = fieldWeight in 4600, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4884486 = idf(docFreq=9980, maxDocs=44218)
0.0390625 = fieldNorm(doc=4600)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Chen, C.: Mapping scientific frontiers : the quest for knowledge visualization (2003)
0.00
0.0036046011 = product of:
0.0072092023 = sum of:
0.0072092023 = product of:
0.014418405 = sum of:
0.014418405 = weight(_text_:m in 2213) [ClassicSimilarity], result of:
0.014418405 = score(doc=2213,freq=2.0), product of:
0.13110629 = queryWeight, product of:
2.4884486 = idf(docFreq=9980, maxDocs=44218)
0.052685954 = queryNorm
0.10997493 = fieldWeight in 2213, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
2.4884486 = idf(docFreq=9980, maxDocs=44218)
0.03125 = fieldNorm(doc=2213)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Type
- m