-
Van der Veer Martens, B.: Do citation systems represent theories of truth? (2001)
0.08
0.078012824 = product of:
0.117019236 = sum of:
0.06921006 = weight(_text_:b in 3925) [ClassicSimilarity], result of:
0.06921006 = score(doc=3925,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.3914457 = fieldWeight in 3925, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.078125 = fieldNorm(doc=3925)
0.047809176 = product of:
0.09561835 = sum of:
0.09561835 = weight(_text_:22 in 3925) [ClassicSimilarity], result of:
0.09561835 = score(doc=3925,freq=4.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.54716086 = fieldWeight in 3925, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.078125 = fieldNorm(doc=3925)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 22. 7.2006 15:22:28
-
Bu, Y.; Li, M.; Gu, W.; Huang, W.-b.: Topic diversity : a discipline scheme-free diversity measurement for journals (2021)
0.07
0.07246507 = product of:
0.1086976 = sum of:
0.04844704 = weight(_text_:b in 209) [ClassicSimilarity], result of:
0.04844704 = score(doc=209,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.27401197 = fieldWeight in 209, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.0546875 = fieldNorm(doc=209)
0.06025056 = product of:
0.12050112 = sum of:
0.12050112 = weight(_text_:72 in 209) [ClassicSimilarity], result of:
0.12050112 = score(doc=209,freq=2.0), product of:
0.27884293 = queryWeight, product of:
5.58764 = idf(docFreq=449, maxDocs=44218)
0.049903523 = queryNorm
0.43214697 = fieldWeight in 209, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.58764 = idf(docFreq=449, maxDocs=44218)
0.0546875 = fieldNorm(doc=209)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Source
- Journal of the Association for Information Science and Technology. 72(2021) no.5, S.523-539
-
Li, J.; Shi, D.: Sleeping beauties in genius work : when were they awakened? (2016)
0.06
0.061472617 = product of:
0.09220892 = sum of:
0.07192521 = weight(_text_:b in 2647) [ClassicSimilarity], result of:
0.07192521 = score(doc=2647,freq=6.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.40680233 = fieldWeight in 2647, product of:
2.4494898 = tf(freq=6.0), with freq of:
6.0 = termFreq=6.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.046875 = fieldNorm(doc=2647)
0.020283714 = product of:
0.040567428 = sum of:
0.040567428 = weight(_text_:22 in 2647) [ClassicSimilarity], result of:
0.040567428 = score(doc=2647,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.23214069 = fieldWeight in 2647, 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=2647)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- "Genius work," proposed by Avramescu, refers to scientific articles whose citations grow exponentially in an extended period, for example, over 50 years. Such articles were defined as "sleeping beauties" by van Raan, who quantitatively studied the phenomenon of delayed recognition. However, the criteria adopted by van Raan at times are not applicable and may confer recognition prematurely. To revise such deficiencies, this paper proposes two new criteria, which are applicable (but not limited) to exponential citation curves. We searched for genius work among articles of Nobel Prize laureates during the period of 1901-2012 on the Web of Science, finding 25 articles of genius work out of 21,438 papers including 10 (by van Raan's criteria) sleeping beauties and 15 nonsleeping-beauties. By our new criteria, two findings were obtained through empirical analysis: (a) the awakening periods for genius work depend on the increase rate b in the exponential function, and (b) lower b leads to a longer sleeping period.
- Date
- 22. 1.2016 14:13:32
-
Rostaing, H.; Barts, N.; Léveillé, V.: Bibliometrics: representation instrument of the multidisciplinary positioning of a scientific area : Implementation for an Advisory Scientific Committee (2007)
0.05
0.054942004 = product of:
0.082413 = sum of:
0.055368047 = weight(_text_:b in 1144) [ClassicSimilarity], result of:
0.055368047 = score(doc=1144,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.31315655 = fieldWeight in 1144, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.0625 = fieldNorm(doc=1144)
0.027044954 = product of:
0.054089908 = sum of:
0.054089908 = weight(_text_:22 in 1144) [ClassicSimilarity], result of:
0.054089908 = score(doc=1144,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.30952093 = fieldWeight in 1144, 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=1144)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 30.12.2007 11:22:39
- Source
- ¬La interdisciplinariedad y la transdisciplinariedad en la organización del conocimiento científico : actas del VIII Congreso ISKO-España, León, 18, 19 y 20 de Abril de 2007 : Interdisciplinarity and transdisciplinarity in the organization of scientific knowledge. Ed.: B. Rodriguez Bravo u. M.L Alvite Diez
-
Scholarly metrics under the microscope : from citation analysis to academic auditing (2015)
0.05
0.054942004 = product of:
0.082413 = sum of:
0.055368047 = weight(_text_:b in 4654) [ClassicSimilarity], result of:
0.055368047 = score(doc=4654,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.31315655 = fieldWeight in 4654, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.0625 = fieldNorm(doc=4654)
0.027044954 = product of:
0.054089908 = sum of:
0.054089908 = weight(_text_:22 in 4654) [ClassicSimilarity], result of:
0.054089908 = score(doc=4654,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = 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)
0.6666667 = coord(2/3)
- Date
- 22. 1.2017 17:12:50
- Editor
- Cronin, B. u. C.R. Sugimoto
-
Vinkler, P.: ¬A quasi-quantitative citation model (1987)
0.05
0.045905188 = product of:
0.13771556 = sum of:
0.13771556 = product of:
0.27543113 = sum of:
0.27543113 = weight(_text_:72 in 2299) [ClassicSimilarity], result of:
0.27543113 = score(doc=2299,freq=2.0), product of:
0.27884293 = queryWeight, product of:
5.58764 = idf(docFreq=449, maxDocs=44218)
0.049903523 = queryNorm
0.9877645 = fieldWeight in 2299, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.58764 = idf(docFreq=449, maxDocs=44218)
0.125 = fieldNorm(doc=2299)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Source
- Scientometrics. 12(1987) nos.1-2, S.47-72
-
Qin, J.: Semantic patterns in bibliographically coupled documents (2002)
0.04
0.04140861 = product of:
0.062112913 = sum of:
0.027684024 = weight(_text_:b in 4266) [ClassicSimilarity], result of:
0.027684024 = score(doc=4266,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.15657827 = fieldWeight in 4266, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.03125 = fieldNorm(doc=4266)
0.03442889 = product of:
0.06885778 = sum of:
0.06885778 = weight(_text_:72 in 4266) [ClassicSimilarity], result of:
0.06885778 = score(doc=4266,freq=2.0), product of:
0.27884293 = queryWeight, product of:
5.58764 = idf(docFreq=449, maxDocs=44218)
0.049903523 = queryNorm
0.24694112 = fieldWeight in 4266, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.58764 = idf(docFreq=449, maxDocs=44218)
0.03125 = fieldNorm(doc=4266)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- Different research fields have different definitions for semantic patterns. For knowledge discovery and representation, semantic patterns represent the distribution of occurrences of words in documents and/or citations. In the broadest sense, the term semantic patterns may also refer to the distribution of occurrences of subjects or topics as reflected in documents. The semantic pattern in a set of documents or a group of topics therefore implies quantitative indicators that describe the subject characteristics of the documents being examined. These characteristics are often described by frequencies of keyword occurrences, number of co-occurred keywords, occurrences of coword, and number of cocitations. There are many ways to analyze and derive semantic patterns in documents and citations. A typical example is text mining in full-text documents, a research topic that studies how to extract useful associations and patterns through clustering, categorizing, and summarizing words in texts. One unique way in library and information science is to discover semantic patterns through bibliographically coupled citations. The history of bibliographical coupling goes back in the early 1960s when Kassler investigated associations among technical reports and technical information flow patterns. A number of definitions may facilitate our understanding of bibliographic coupling: (1) bibliographic coupling determines meaningful relations between papers by a study of each paper's bibliography; (2) a unit of coupling is the functional bond between papers when they share a single reference item; (3) coupling strength shows the order of combinations of units of coupling into a graded scale between groups of papers; and (4) a coupling criterion is the way by which the coupling units are combined between two or more papers. Kessler's classic paper an bibliographic coupling between scientific papers proposes the following two graded criteria: Criterion A: A number of papers constitute a related group GA if each member of the group has at least one coupling unit to a given test paper P0. The coupling strength between P0 and any member of GA is measured by the number of coupling units n between them. G(subA)(supn) is that portion of GA that is linked to P0 through n coupling units; Criterion B: A number of papers constitute a related group GB if each member of the group has at least one coupling unit to every other member of the group.
- Source
- Encyclopedia of library and information science. Vol.72, [=Suppl.35]
-
¬Die deutsche Zeitschrift für Dokumentation, Informationswissenschaft und Informationspraxis von 1950 bis 2011 : eine vorläufige Bilanz in vier Abschnitten (2012)
0.04
0.0412065 = product of:
0.06180975 = sum of:
0.041526034 = weight(_text_:b in 402) [ClassicSimilarity], result of:
0.041526034 = score(doc=402,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.23486741 = fieldWeight in 402, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.046875 = fieldNorm(doc=402)
0.020283714 = product of:
0.040567428 = sum of:
0.040567428 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
0.040567428 = score(doc=402,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.23214069 = fieldWeight in 402, 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=402)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 22. 7.2012 19:35:26
- Footnote
- Besteht aus 4 Teilen: Teil 1: Eden, D., A. Arndt, A. Hoffer, T. Raschke u. P. Schön: Die Nachrichten für Dokumentation in den Jahren 1950 bis 1962 (S.159-163). Teil 2: Brose, M., E. durst, D. Nitzsche, D. Veckenstedt u. R. Wein: Statistische Untersuchung der Fachzeitschrift "Nachrichten für Dokumentation" (NfD) 1963-1975 (S.164-170). Teil 3: Bösel, J., G. Ebert, P. Garz,, M. Iwanow u. B. Russ: Methoden und Ergebnisse einer statistischen Auswertung der Fachzeitschrift "Nachrichten für Dokumentation" (NfD) 1976 bis 1988 (S.171-174). Teil 4: Engelage, H., S. Jansen, R. Mertins, K. Redel u. S. Ring: Statistische Untersuchung der Fachzeitschrift "Nachrichten für Dokumentation" (NfD) / "Information. Wissenschaft & Praxis" (IWP) 1989-2011 (S.164-170).
-
Milard, B.; Pitarch, Y.: Egocentric cocitation networks and scientific papers destinies (2023)
0.04
0.0412065 = product of:
0.06180975 = sum of:
0.041526034 = weight(_text_:b in 918) [ClassicSimilarity], result of:
0.041526034 = score(doc=918,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.23486741 = fieldWeight in 918, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.046875 = fieldNorm(doc=918)
0.020283714 = product of:
0.040567428 = sum of:
0.040567428 = weight(_text_:22 in 918) [ClassicSimilarity], result of:
0.040567428 = score(doc=918,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.23214069 = fieldWeight in 918, 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=918)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 21. 3.2023 19:22:14
-
Thelwall, M.; Thelwall, S.: ¬A thematic analysis of highly retweeted early COVID-19 tweets : consensus, information, dissent and lockdown life (2020)
0.04
0.039959475 = product of:
0.119878426 = sum of:
0.119878426 = sum of:
0.08607223 = weight(_text_:72 in 178) [ClassicSimilarity], result of:
0.08607223 = score(doc=178,freq=2.0), product of:
0.27884293 = queryWeight, product of:
5.58764 = idf(docFreq=449, maxDocs=44218)
0.049903523 = queryNorm
0.3086764 = fieldWeight in 178, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.58764 = idf(docFreq=449, maxDocs=44218)
0.0390625 = fieldNorm(doc=178)
0.033806194 = weight(_text_:22 in 178) [ClassicSimilarity], result of:
0.033806194 = score(doc=178,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.19345059 = fieldWeight in 178, 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=178)
0.33333334 = coord(1/3)
- Date
- 20. 1.2015 18:30:22
- Source
- Aslib journal of information management. 72(2020) no.6, S.945-962
-
Folly, G.; Hajtman, B.; Nagy, J.I.; Ruff, I.: Some methodological problems in ranking scientists by citation analysis (1981)
0.04
0.03691203 = product of:
0.110736094 = sum of:
0.110736094 = weight(_text_:b in 3275) [ClassicSimilarity], result of:
0.110736094 = score(doc=3275,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.6263131 = fieldWeight in 3275, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.125 = fieldNorm(doc=3275)
0.33333334 = coord(1/3)
-
Nacke, O.: Zitatenanalyse im engeren Sinne (1980)
0.03
0.034428895 = product of:
0.10328668 = sum of:
0.10328668 = product of:
0.20657337 = sum of:
0.20657337 = weight(_text_:72 in 399) [ClassicSimilarity], result of:
0.20657337 = score(doc=399,freq=2.0), product of:
0.27884293 = queryWeight, product of:
5.58764 = idf(docFreq=449, maxDocs=44218)
0.049903523 = queryNorm
0.7408234 = fieldWeight in 399, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.58764 = idf(docFreq=449, maxDocs=44218)
0.09375 = fieldNorm(doc=399)
0.5 = coord(1/2)
0.33333334 = coord(1/3)
- Pages
- S.51-72
-
Chen, C.: CiteSpace II : detecting and visualizing emerging trends and transient patterns in scientific literature (2006)
0.03
0.034338754 = product of:
0.05150813 = sum of:
0.03460503 = weight(_text_:b in 5272) [ClassicSimilarity], result of:
0.03460503 = score(doc=5272,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.19572285 = fieldWeight in 5272, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.0390625 = fieldNorm(doc=5272)
0.016903097 = product of:
0.033806194 = sum of:
0.033806194 = weight(_text_:22 in 5272) [ClassicSimilarity], result of:
0.033806194 = score(doc=5272,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = 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)
0.6666667 = coord(2/3)
- 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
-
Mukherjee, B.: Do open-access journals in library and information science have any scholarly impact? : a bibliometric study of selected open-access journals using Google Scholar (2009)
0.03
0.034338754 = product of:
0.05150813 = sum of:
0.03460503 = weight(_text_:b in 2745) [ClassicSimilarity], result of:
0.03460503 = score(doc=2745,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.19572285 = fieldWeight in 2745, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.0390625 = fieldNorm(doc=2745)
0.016903097 = product of:
0.033806194 = sum of:
0.033806194 = weight(_text_:22 in 2745) [ClassicSimilarity], result of:
0.033806194 = score(doc=2745,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.19345059 = fieldWeight in 2745, 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=2745)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 22. 3.2009 17:54:59
-
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)
0.03
0.034338754 = product of:
0.05150813 = sum of:
0.03460503 = weight(_text_:b in 4186) [ClassicSimilarity], result of:
0.03460503 = score(doc=4186,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.19572285 = fieldWeight in 4186, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.0390625 = fieldNorm(doc=4186)
0.016903097 = product of:
0.033806194 = sum of:
0.033806194 = weight(_text_:22 in 4186) [ClassicSimilarity], result of:
0.033806194 = score(doc=4186,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = 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)
0.6666667 = coord(2/3)
- Abstract
- The Impact Factors (IFs) of the Institute for Scientific Information suffer from a number of drawbacks, among them the statistics-Why should one use the mean and not the median?-and the incomparability among fields of science because of systematic differences in citation behavior among fields. Can these drawbacks be counteracted by fractionally counting citation weights instead of using whole numbers in the numerators? (a) Fractional citation counts are normalized in terms of the citing sources and thus would take into account differences in citation behavior among fields of science. (b) Differences in the resulting distributions can be tested statistically for their significance at different levels of aggregation. (c) Fractional counting can be generalized to any document set including journals or groups of journals, and thus the significance of differences among both small and large sets can be tested. A list of fractionally counted IFs for 2008 is available online at http:www.leydesdorff.net/weighted_if/weighted_if.xls The between-group variance among the 13 fields of science identified in the U.S. Science and Engineering Indicators is no longer statistically significant after this normalization. Although citation behavior differs largely between disciplines, the reflection of these differences in fractionally counted citation distributions can not be used as a reliable instrument for the classification.
- Date
- 22. 1.2011 12:51:07
-
Stvilia, B.; Hinnant, C.C.; Schindler, K.; Worrall, A.; Burnett, G.; Burnett, K.; Kazmer, M.M.; Marty, P.F.: Composition of scientific teams and publication productivity at a national science lab (2011)
0.03
0.034338754 = product of:
0.05150813 = sum of:
0.03460503 = weight(_text_:b in 4191) [ClassicSimilarity], result of:
0.03460503 = score(doc=4191,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.19572285 = fieldWeight in 4191, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.0390625 = fieldNorm(doc=4191)
0.016903097 = product of:
0.033806194 = sum of:
0.033806194 = weight(_text_:22 in 4191) [ClassicSimilarity], result of:
0.033806194 = score(doc=4191,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.19345059 = fieldWeight in 4191, 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=4191)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Date
- 22. 1.2011 13:19:42
-
Cerda-Cosme, R.; Méndez, E.: Analysis of shared research data in Spanish scientific papers about COVID-19 : a first approach (2023)
0.03
0.034338754 = product of:
0.05150813 = sum of:
0.03460503 = weight(_text_:b in 916) [ClassicSimilarity], result of:
0.03460503 = score(doc=916,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.19572285 = fieldWeight in 916, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.0390625 = fieldNorm(doc=916)
0.016903097 = product of:
0.033806194 = sum of:
0.033806194 = weight(_text_:22 in 916) [ClassicSimilarity], result of:
0.033806194 = score(doc=916,freq=2.0), product of:
0.17475364 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.049903523 = queryNorm
0.19345059 = fieldWeight in 916, 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=916)
0.5 = coord(1/2)
0.6666667 = coord(2/3)
- Abstract
- During the coronavirus pandemic, changes in the way science is done and shared occurred, which motivates meta-research to help understand science communication in crises and improve its effectiveness. The objective is to study how many Spanish scientific papers on COVID-19 published during 2020 share their research data. Qualitative and descriptive study applying nine attributes: (a) availability, (b) accessibility, (c) format, (d) licensing, (e) linkage, (f) funding, (g) editorial policy, (h) content, and (i) statistics. We analyzed 1,340 papers, 1,173 (87.5%) did not have research data. A total of 12.5% share their research data of which 2.1% share their data in repositories, 5% share their data through a simple request, 0.2% do not have permission to share their data, and 5.2% share their data as supplementary material. There is a small percentage that shares their research data; however, it demonstrates the researchers' poor knowledge on how to properly share their research data and their lack of knowledge on what is research data.
- Date
- 21. 3.2023 19:22:02
-
Sellen, M.K.: Bibliometrics : an annotated bibliography 1970-1990 (1993)
0.03
0.03229803 = product of:
0.09689408 = sum of:
0.09689408 = weight(_text_:b in 402) [ClassicSimilarity], result of:
0.09689408 = score(doc=402,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.54802394 = fieldWeight in 402, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.109375 = fieldNorm(doc=402)
0.33333334 = coord(1/3)
- Type
- b
-
Cronin, B.: Bibliometrics and beyond : some thoughts on web-based citation analysis (2001)
0.03
0.03229803 = product of:
0.09689408 = sum of:
0.09689408 = weight(_text_:b in 3890) [ClassicSimilarity], result of:
0.09689408 = score(doc=3890,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.54802394 = fieldWeight in 3890, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.109375 = fieldNorm(doc=3890)
0.33333334 = coord(1/3)
-
Informetrics '91 : selected papers from the 3rd International Conference on Bibliometrics, 9-12 Aug. 1991, Bangalore (1993)
0.03
0.027684024 = product of:
0.08305207 = sum of:
0.08305207 = weight(_text_:b in 5063) [ClassicSimilarity], result of:
0.08305207 = score(doc=5063,freq=2.0), product of:
0.17680629 = queryWeight, product of:
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.049903523 = queryNorm
0.46973482 = fieldWeight in 5063, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.542962 = idf(docFreq=3476, maxDocs=44218)
0.09375 = fieldNorm(doc=5063)
0.33333334 = coord(1/3)
- Footnote
- Rez. in: Journal of librarianship and information science 25(1993) no.4, S.216 (B. Cronin)
