-
Romero-Frías, E.; Vaughan, L.: European political trends viewed through patterns of Web linking (2010)
0.02
0.022100445 = product of:
0.04420089 = sum of:
0.04420089 = product of:
0.08840178 = sum of:
0.08840178 = weight(_text_:maps in 4002) [ClassicSimilarity], result of:
0.08840178 = score(doc=4002,freq=2.0), product of:
0.28477904 = queryWeight, product of:
5.619245 = idf(docFreq=435, maxDocs=44218)
0.050679237 = queryNorm
0.31042236 = fieldWeight in 4002, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.619245 = idf(docFreq=435, maxDocs=44218)
0.0390625 = fieldNorm(doc=4002)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This study explored the feasibility of using Web hyperlink data to study European political Web sites. Ninety-six European Union (EU) political parties belonging to a wide range of ideological, historical, and linguistic backgrounds were included in the study. Various types of data on Web links to party Web sites were collected. The Web colink data were visualized using multidimensional scaling (MDS), while the inlink data were analyzed with a 2-way analysis of variance test. The results showed that Web hyperlink data did reflect some political patterns in the EU. The MDS maps showed clusters of political parties along ideological, historical, linguistic, and social lines. Statistical analysis based on inlink counts further confirmed that there was a significant difference along the line of the political history of a country, such that left-wing parties in the former communist countries received considerably fewer inlinks to their Web sites than left-wing parties in countries without a history of communism did. The study demonstrated the possibility of using Web hyperlink data to gain insights into political situations in the EU. This suggests the richness of Web hyperlink data and its potential in studying social-political phenomena.
-
Waltman, L.; Eck, N.J. van: ¬A new methodology for constructing a publication-level classification system of science : keyword maps in Google scholar citations (2012)
0.02
0.022100445 = product of:
0.04420089 = sum of:
0.04420089 = product of:
0.08840178 = sum of:
0.08840178 = weight(_text_:maps in 511) [ClassicSimilarity], result of:
0.08840178 = score(doc=511,freq=2.0), product of:
0.28477904 = queryWeight, product of:
5.619245 = idf(docFreq=435, maxDocs=44218)
0.050679237 = queryNorm
0.31042236 = fieldWeight in 511, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.619245 = idf(docFreq=435, maxDocs=44218)
0.0390625 = fieldNorm(doc=511)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Shen, J.; Yao, L.; Li, Y.; Clarke, M.; Wang, L.; Li, D.: Visualizing the history of evidence-based medicine : a bibliometric analysis (2013)
0.02
0.022100445 = product of:
0.04420089 = sum of:
0.04420089 = product of:
0.08840178 = sum of:
0.08840178 = weight(_text_:maps in 1090) [ClassicSimilarity], result of:
0.08840178 = score(doc=1090,freq=2.0), product of:
0.28477904 = queryWeight, product of:
5.619245 = idf(docFreq=435, maxDocs=44218)
0.050679237 = queryNorm
0.31042236 = fieldWeight in 1090, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.619245 = idf(docFreq=435, maxDocs=44218)
0.0390625 = fieldNorm(doc=1090)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- The aim of this paper is to visualize the history of evidence-based medicine (EBM) and to examine the characteristics of EBM development in China and the West. We searched the Web of Science and the Chinese National Knowledge Infrastructure database for papers related to EBM. We applied information visualization techniques, citation analysis, cocitation analysis, cocitation cluster analysis, and network analysis to construct historiographies, themes networks, and chronological theme maps regarding EBM in China and the West. EBM appeared to develop in 4 stages: incubation (1972-1992 in the West vs. 1982-1999 in China), initiation (1992-1993 vs. 1999-2000), rapid development (1993-2000 vs. 2000-2004), and stable distribution (2000 onwards vs. 2004 onwards). Although there was a lag in EBM initiation in China compared with the West, the pace of development appeared similar. Our study shows that important differences exist in research themes, domain structures, and development depth, and in the speed of adoption between China and the West. In the West, efforts in EBM have shifted from education to practice, and from the quality of evidence to its translation. In China, there was a similar shift from education to practice, and from production of evidence to its translation. In addition, this concept has diffused to other healthcare areas, leading to the development of evidence-based traditional Chinese medicine, evidence-based nursing, and evidence-based policy making.
-
Meireles, N.R.G.; Cendón, B.V.; Almeida, P.E.M. de: Bibliometric knowledge organization : a domain analytic method using artificial neural networks (2014)
0.02
0.022100445 = product of:
0.04420089 = sum of:
0.04420089 = product of:
0.08840178 = sum of:
0.08840178 = weight(_text_:maps in 1377) [ClassicSimilarity], result of:
0.08840178 = score(doc=1377,freq=2.0), product of:
0.28477904 = queryWeight, product of:
5.619245 = idf(docFreq=435, maxDocs=44218)
0.050679237 = queryNorm
0.31042236 = fieldWeight in 1377, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.619245 = idf(docFreq=435, maxDocs=44218)
0.0390625 = fieldNorm(doc=1377)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- The organization of large collections of documents has become more important with the increase in the amount of digital information available. In certain constricted domains of knowledge, keywords and subject descriptors tend to be similar and therefore insufficient to differentiate documents. In this context, instead of relying only on the presence of common terms, the identification of common cited references can be useful to define semantic relationship among documents. The purpose of this work is to add another instance on the research linking information retrieval and bibliometric techniques aided by information technology. A domain analytic method was developed to generate clusters of documents, which uses self-organizing maps, in the scope of artificial neural networks, to categorize documents. The results obtained show that this approach successfully identified clusters of authors and documents through their cited references. In addition, further qualitative analysis of these clusters demonstrates the existence of semantic relationships between the documents. This study can contribute to the development of the field of knowledge organization by evaluating the use of artificial neural networks in the automatic categorization of documents in a constricted knowledge domain based on the analysis of the references cited by these documents.
-
Wang, F.; Wolfram, D.: Assessment of journal similarity based on citing discipline analysis (2015)
0.02
0.022100445 = product of:
0.04420089 = sum of:
0.04420089 = product of:
0.08840178 = sum of:
0.08840178 = weight(_text_:maps in 1849) [ClassicSimilarity], result of:
0.08840178 = score(doc=1849,freq=2.0), product of:
0.28477904 = queryWeight, product of:
5.619245 = idf(docFreq=435, maxDocs=44218)
0.050679237 = queryNorm
0.31042236 = fieldWeight in 1849, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.619245 = idf(docFreq=435, maxDocs=44218)
0.0390625 = fieldNorm(doc=1849)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This study compares the range of disciplines of citing journal articles to determine how closely related journals assigned to the same Web of Science research area are. The frequency distribution of disciplines by citing articles provides a signature for a cited journal that permits it to be compared with other journals using similarity comparison techniques. As an initial exploration, citing discipline data for 40 high-impact-factor journals assigned to the "information science and library science" category of the Web of Science were compared across 5 time periods. Similarity relationships were determined using multidimensional scaling and hierarchical cluster analysis to compare the outcomes produced by the proposed citing discipline and established cocitation methods. The maps and clustering outcomes reveal that a number of journals in allied areas of the information science and library science category may not be very closely related to each other or may not be appropriately situated in the category studied. The citing discipline similarity data resulted in similar outcomes with the cocitation data but with some notable differences. Because the citing discipline method relies on a citing perspective different from cocitations, it may provide a complementary way to compare journal similarity that is less labor intensive than cocitation analysis.
-
Tu, Y.-N.; Hsu, S.-L.: Constructing conceptual trajectory maps to trace the development of research fields (2016)
0.02
0.022100445 = product of:
0.04420089 = sum of:
0.04420089 = product of:
0.08840178 = sum of:
0.08840178 = weight(_text_:maps in 3059) [ClassicSimilarity], result of:
0.08840178 = score(doc=3059,freq=2.0), product of:
0.28477904 = queryWeight, product of:
5.619245 = idf(docFreq=435, maxDocs=44218)
0.050679237 = queryNorm
0.31042236 = fieldWeight in 3059, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.619245 = idf(docFreq=435, maxDocs=44218)
0.0390625 = fieldNorm(doc=3059)
0.5 = coord(1/2)
0.5 = coord(1/2)
-
Zhang, Y.; Zhang, G.; Zhu, D.; Lu, J.: Scientific evolutionary pathways : identifying and visualizing relationships for scientific topics (2017)
0.02
0.022100445 = product of:
0.04420089 = sum of:
0.04420089 = product of:
0.08840178 = sum of:
0.08840178 = weight(_text_:maps in 3758) [ClassicSimilarity], result of:
0.08840178 = score(doc=3758,freq=2.0), product of:
0.28477904 = queryWeight, product of:
5.619245 = idf(docFreq=435, maxDocs=44218)
0.050679237 = queryNorm
0.31042236 = fieldWeight in 3758, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.619245 = idf(docFreq=435, maxDocs=44218)
0.0390625 = fieldNorm(doc=3758)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- Whereas traditional science maps emphasize citation statistics and static relationships, this paper presents a term-based method to identify and visualize the evolutionary pathways of scientific topics in a series of time slices. First, we create a data preprocessing model for accurate term cleaning, consolidating, and clustering. Then we construct a simulated data streaming function and introduce a learning process to train a relationship identification function to adapt to changing environments in real time, where relationships of topic evolution, fusion, death, and novelty are identified. The main result of the method is a map of scientific evolutionary pathways. The visual routines provide a way to indicate the interactions among scientific subjects and a version in a series of time slices helps further illustrate such evolutionary pathways in detail. The detailed outline offers sufficient statistical information to delve into scientific topics and routines and then helps address meaningful insights with the assistance of expert knowledge. This empirical study focuses on scientific proposals granted by the United States National Science Foundation, and demonstrates the feasibility and reliability. Our method could be widely applied to a range of science, technology, and innovation policy research, and offer insight into the evolutionary pathways of scientific activities.
-
Marx, W.; Bornmann, L.: On the problems of dealing with bibliometric data (2014)
0.02
0.020599011 = product of:
0.041198023 = sum of:
0.041198023 = product of:
0.082396045 = sum of:
0.082396045 = weight(_text_:22 in 1239) [ClassicSimilarity], result of:
0.082396045 = score(doc=1239,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.46428138 = fieldWeight in 1239, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.09375 = fieldNorm(doc=1239)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 18. 3.2014 19:13:22
-
Scholarly metrics under the microscope : from citation analysis to academic auditing (2015)
0.01
0.0137326745 = product of:
0.027465349 = sum of:
0.027465349 = product of:
0.054930698 = sum of:
0.054930698 = weight(_text_:22 in 4654) [ClassicSimilarity], result of:
0.054930698 = score(doc=4654,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.30952093 = fieldWeight in 4654, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=4654)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 1.2017 17:12:50
-
Bornmann, L.; Mutz, R.: From P100 to P100' : a new citation-rank approach (2014)
0.01
0.0137326745 = product of:
0.027465349 = sum of:
0.027465349 = product of:
0.054930698 = sum of:
0.054930698 = weight(_text_:22 in 1431) [ClassicSimilarity], result of:
0.054930698 = score(doc=1431,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.30952093 = fieldWeight in 1431, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=1431)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 8.2014 17:05:18
-
Ohly, P.: Dimensions of globality : a bibliometric analysis (2016)
0.01
0.0137326745 = product of:
0.027465349 = sum of:
0.027465349 = product of:
0.054930698 = sum of:
0.054930698 = weight(_text_:22 in 4942) [ClassicSimilarity], result of:
0.054930698 = score(doc=4942,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.30952093 = fieldWeight in 4942, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0625 = fieldNorm(doc=4942)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 20. 1.2019 11:22:31
-
Crespo, J.A.; Herranz, N.; Li, Y.; Ruiz-Castillo, J.: ¬The effect on citation inequality of differences in citation practices at the web of science subject category level (2014)
0.01
0.012138084 = product of:
0.024276167 = sum of:
0.024276167 = product of:
0.048552334 = sum of:
0.048552334 = weight(_text_:22 in 1291) [ClassicSimilarity], result of:
0.048552334 = score(doc=1291,freq=4.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.27358043 = fieldWeight in 1291, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=1291)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This article studies the impact of differences in citation practices at the subfield, or Web of Science subject category level, using the model introduced in Crespo, Li, and Ruiz-Castillo (2013a), according to which the number of citations received by an article depends on its underlying scientific influence and the field to which it belongs. We use the same Thomson Reuters data set of about 4.4 million articles used in Crespo et al. (2013a) to analyze 22 broad fields. The main results are the following: First, when the classification system goes from 22 fields to 219 subfields the effect on citation inequality of differences in citation practices increases from ?14% at the field level to 18% at the subfield level. Second, we estimate a set of exchange rates (ERs) over a wide [660, 978] citation quantile interval to express the citation counts of articles into the equivalent counts in the all-sciences case. In the fractional case, for example, we find that in 187 of 219 subfields the ERs are reliable in the sense that the coefficient of variation is smaller than or equal to 0.10. Third, in the fractional case the normalization of the raw data using the ERs (or subfield mean citations) as normalization factors reduces the importance of the differences in citation practices from 18% to 3.8% (3.4%) of overall citation inequality. Fourth, the results in the fractional case are essentially replicated when we adopt a multiplicative approach.
-
Yan, E.: Finding knowledge paths among scientific disciplines (2014)
0.01
0.012138084 = product of:
0.024276167 = sum of:
0.024276167 = product of:
0.048552334 = sum of:
0.048552334 = weight(_text_:22 in 1534) [ClassicSimilarity], result of:
0.048552334 = score(doc=1534,freq=4.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.27358043 = fieldWeight in 1534, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=1534)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 26.10.2014 20:22:22
-
Zhu, Q.; Kong, X.; Hong, S.; Li, J.; He, Z.: Global ontology research progress : a bibliometric analysis (2015)
0.01
0.012138084 = product of:
0.024276167 = sum of:
0.024276167 = product of:
0.048552334 = sum of:
0.048552334 = weight(_text_:22 in 2590) [ClassicSimilarity], result of:
0.048552334 = score(doc=2590,freq=4.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.27358043 = fieldWeight in 2590, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0390625 = fieldNorm(doc=2590)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 20. 1.2015 18:30:22
17. 9.2018 18:22:23
-
Campanario, J.M.: Large increases and decreases in journal impact factors in only one year : the effect of journal self-citations (2011)
0.01
0.01201609 = product of:
0.02403218 = sum of:
0.02403218 = product of:
0.04806436 = sum of:
0.04806436 = weight(_text_:22 in 4187) [ClassicSimilarity], result of:
0.04806436 = score(doc=4187,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.2708308 = fieldWeight in 4187, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=4187)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 1.2011 12:53:00
-
Ding, Y.: Applying weighted PageRank to author citation networks (2011)
0.01
0.01201609 = product of:
0.02403218 = sum of:
0.02403218 = product of:
0.04806436 = sum of:
0.04806436 = weight(_text_:22 in 4188) [ClassicSimilarity], result of:
0.04806436 = score(doc=4188,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.2708308 = fieldWeight in 4188, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=4188)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 1.2011 13:02:21
-
Vieira, E.S.; Cabral, J.A.S.; Gomes, J.A.N.F.: Definition of a model based on bibliometric indicators for assessing applicants to academic positions (2014)
0.01
0.01201609 = product of:
0.02403218 = sum of:
0.02403218 = product of:
0.04806436 = sum of:
0.04806436 = weight(_text_:22 in 1221) [ClassicSimilarity], result of:
0.04806436 = score(doc=1221,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.2708308 = fieldWeight in 1221, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.0546875 = fieldNorm(doc=1221)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 18. 3.2014 18:22:21
-
Ajiferuke, I.; Lu, K.; Wolfram, D.: ¬A comparison of citer and citation-based measure outcomes for multiple disciplines (2010)
0.01
0.010299506 = product of:
0.020599011 = sum of:
0.020599011 = product of:
0.041198023 = sum of:
0.041198023 = weight(_text_:22 in 4000) [ClassicSimilarity], result of:
0.041198023 = score(doc=4000,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.23214069 = fieldWeight in 4000, 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=4000)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 28. 9.2010 12:54:22
-
Albarrán, P.; Ruiz-Castillo, J.: References made and citations received by scientific articles (2011)
0.01
0.010299506 = product of:
0.020599011 = sum of:
0.020599011 = product of:
0.041198023 = sum of:
0.041198023 = weight(_text_:22 in 4185) [ClassicSimilarity], result of:
0.041198023 = score(doc=4185,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.23214069 = fieldWeight in 4185, 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=4185)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- This article studies massive evidence about references made and citations received after a 5-year citation window by 3.7 million articles published in 1998 to 2002 in 22 scientific fields. We find that the distributions of references made and citations received share a number of basic features across sciences. Reference distributions are rather skewed to the right while citation distributions are even more highly skewed: The mean is about 20 percentage points to the right of the median, and articles with a remarkable or an outstanding number of citations represent about 9% of the total. Moreover, the existence of a power law representing the upper tail of citation distributions cannot be rejected in 17 fields whose articles represent 74.7% of the total. Contrary to the evidence in other contexts, the value of the scale parameter is above 3.5 in 13 of the 17 cases. Finally, power laws are typically small, but capture a considerable proportion of the total citations received.
-
D'Angelo, C.A.; Giuffrida, C.; Abramo, G.: ¬A heuristic approach to author name disambiguation in bibliometrics databases for large-scale research assessments (2011)
0.01
0.010299506 = product of:
0.020599011 = sum of:
0.020599011 = product of:
0.041198023 = sum of:
0.041198023 = weight(_text_:22 in 4190) [ClassicSimilarity], result of:
0.041198023 = score(doc=4190,freq=2.0), product of:
0.17747006 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.050679237 = queryNorm
0.23214069 = fieldWeight in 4190, 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=4190)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 1.2011 13:06:52
