共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
A comparison of bibliometric indicators for computer science scholars and journals on Web of Science and Google Scholar 总被引:1,自引:0,他引:1
Massimo Franceschet 《Scientometrics》2010,83(1):243-258
Given the current availability of different bibliometric indicators and of production and citation data sources, the following two questions immediately arise: do the indicators’ scores differ when computed on different data sources? More importantly, do the indicator-based rankings significantly change when computed on different data sources? We provide a case study for computer science scholars and journals evaluated on Web of Science and Google Scholar databases. The study concludes that Google scholar computes significantly higher indicators’ scores than Web of Science. Nevertheless, citation-based rankings of both scholars and journals do not significantly change when compiled on the two data sources, while rankings based on the h index show a moderate degree of variation. 相似文献
3.
Research assessment carries important implications both at the individual and institutional levels. This paper examines the research outputs of scholars in business schools and shows how their performance assessment is significantly affected when using data extracted either from the Thomson ISI Web of Science (WoS) or from Google Scholar (GS). The statistical analyses of this paper are based on a large survey data of scholars of Canadian business schools, used jointly with data extracted from the WoS and GS databases. Firstly, the findings of this study reveal that the average performance of B scholars regarding the number of contributions, citations, and the h-index is much higher when performances are assessed using GS rather than WoS. Moreover, the results also show that the scholars who exhibit the highest performances when assessed in reference to articles published in ISI-listed journals also exhibit the highest performances in Google Scholar. Secondly, the absence of association between the strength of ties forged with companies, as well as between the customization of the knowledge transferred to companies and research performances of B scholars such as measured by indicators extracted from WoS and GS, provides some evidence suggesting that mode 1 and 2 knowledge productions might be compatible. Thirdly, the results also indicate that senior B scholars did not differ in a statistically significant manner from their junior colleagues with regard to the proportion of contributions compiled in WoS and GS. However, the results show that assistant professors have a higher proportion of citations in WoS than associate and full professors have. Fourthly, the results of this study suggest that B scholars in accounting tend to publish a smaller proportion of their work in GS than their colleagues in information management, finance and economics. Fifthly, the results of this study show that there is no significant difference between the contributions record of scholars located in English language and French language B schools when their performances are assessed with Google Scholar. However, scholars in English language B schools exhibit higher citation performances and higher h-indices both in WoS and GS. Overall, B scholars might not be confronted by having to choose between two incompatible knowledge production modes, but with the requirement of the evidence-based management approach. As a consequence, the various assessment exercises undertaken by university administrators, government agencies and associations of business schools should complement the data provided in WoS with those provided in GS. 相似文献
4.
Mapping interdisciplinarity at the interfaces between the Science Citation Index and the Social Science Citation Index 总被引:2,自引:0,他引:2
Loet Leydesdorff 《Scientometrics》2007,71(3):391-405
The two Journal Citation Reports of the Science Citation Index 2004 and the Social Science Citation Index 2004 were combined in order to analyze and map journals
and specialties at the edges and in the overlap between the two databases. For journals which belong to the overlap (e.g.,
Scientometrics), the merger mainly enriches our insight into the structure which can be obtained from the two databases separately; but
in the case of scientific journals which are more marginal in either database, the combination can provide a new perspective
on the position and function of these journals (e.g., Environment and Planning B — Planning and Design). The combined database additionally enables us to map citation environments in terms of the various specialties comprehensively.
Using the vector-space model, visualizations are provided for specialties that are parts of the overlap (information science,
science & technology studies). On the basis of the resulting visualizations, “betweenness” — a measure from social network
analysis — is suggested as an indicator for measuring the interdisciplinarity of journals. 相似文献
5.
6.
A novel method for depicting academic disciplines through Google Scholar Citations: The case of Bibliometrics 总被引:1,自引:0,他引:1
Martín-Martín Alberto Orduna-Malea Enrique Delgado López-Cózar Emilio 《Scientometrics》2018,114(3):1251-1273
Scientometrics - This article describes a procedure to generate a snapshot of the structure of a specific scientific community and their outputs based on the information available in Google Scholar... 相似文献
7.
Martín-Martín Alberto Orduna-Malea Enrique Delgado López-Cózar Emilio 《Scientometrics》2018,116(3):2175-2188
Scientometrics - This study explores the extent to which bibliometric indicators based on counts of highly-cited documents could be affected by the choice of data source. The initial hypothesis is... 相似文献
8.
Anne-Wil Harzing 《Scientometrics》2014,98(1):565-575
Harzing (Scientometrics, 2013) showed that between April 2011 and January 2012, Google Scholar has very significantly expanded its coverage in Chemistry and Physics, with a more modest expansion for Medicine and a natural increase in citations only for Economics. However, we do not yet know whether this expansion of coverage was temporary or permanent, nor whether a further expansion of coverage has occurred. It is these questions we set out to respond in this research note. We use a sample of 20 Nobelists in Chemistry, Economics, Medicine and Physics and track their h-index, g-index and total citations in Google Scholar on a monthly basis. Our data suggest that—after a period of significant expansion for Chemistry and Physics—Google Scholar coverage is now increasing at a stable rate. Google Scholar also appears to provide comprehensive coverage for the four disciplines we studied. The increased stability and coverage might make Google Scholar much more suitable for research evaluation and bibliometric research purposes than it has been in the past. 相似文献
9.
Web of Science (WoS) and Google Scholar (GS) are prominent citation services with distinct indexing mechanisms. Comprehensive knowledge about the growth patterns of these two citation services is lacking. We analyzed the development of citation counts in WoS and GS for two classic articles and 56 articles from diverse research fields, making a distinction between retroactive growth (i.e., the relative difference between citation counts up to mid-2005 measured in mid-2005 and citation counts up to mid-2005 measured in April 2013) and actual growth (i.e., the relative difference between citation counts up to mid-2005 measured in April 2013 and citation counts up to April 2013 measured in April 2013). One of the classic articles was used for a citation-by-citation analysis. Results showed that GS has substantially grown in a retroactive manner (median of 170 % across articles), especially for articles that initially had low citations counts in GS as compared to WoS. Retroactive growth of WoS was small, with a median of 2 % across articles. Actual growth percentages were moderately higher for GS than for WoS (medians of 54 vs. 41 %). The citation-by-citation analysis showed that the percentage of citations being unique in WoS was lower for more recent citations (6.8 % for citations from 1995 and later vs. 41 % for citations from before 1995), whereas the opposite was noted for GS (57 vs. 33 %). It is concluded that, since its inception, GS has shown substantial expansion, and that the majority of recent works indexed in WoS are now also retrievable via GS. A discussion is provided on quantity versus quality of citations, threats for WoS, weaknesses of GS, and implications for literature research and research evaluation. 相似文献
10.
Scientometrics - The purpose of this study is to ascertain the suitability of GS’s url-based method as a valid approximation of universities’ academic output measures, taking into... 相似文献
11.
The aggregated journal-journal citation matrix of the Journal Citation Report 2001of the Social Science Citation Indexis analyzed as a single domain in terms of both its eigenvectors and the bi-connected components contained in it. The traditional
disciplines (e.g., economics, psychology, or political science) can be retrieved using both methods. These main disciplines
do interact marginally. The space between them is occupied by a large number of small clusters of journals indicating specialties
that gravitate among the major disciplines. These specialties operate in a mode different from that of the disciplines. For
example, the impact factors are low on average and the developments remain volatile. Factor analysis enables us to study how
the smaller bi-connected components are related to the larger ones. Factor analysis also highlights methodological differences
among groups which may be theoretically connected in a single bi-component.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
12.
A bibliometric analysis was conducted to evaluate the global scientific output of proteomics research in the Science Citation Index Expanded from 1995 to 2010. The document types, languages, journals, categories, countries, and institutions were analyzed to obtain publication patterns. Research focuses and trends were revealed by a word cluster method related to author keywords, title, abstract, and KeyWords Plus. Bradford’s Law and the correlation between keywords and institutions were identified to look deeper into the nature works. Proteomics and Journal of Proteome Research published the most articles in proteomics research. The researchers focused on the categories of biochemical research methods, and biochemistry and molecular biology. The USA and Harvard University were the most productive country and institution, respectively, while China was the fastest-growing country due to the support by Chinese government. The distribution of author keywords provided the important clues of hot issues. Results showed that mass spectrometry and two-dimensional gel electrophoresis had been the most frequently used research methods in the past 16 years; and cancer proteomics had a strong potential in the near future. Furthermore, biologists contributed significantly to proteomics research, and were more likely to co-operate with medical scientists. 相似文献
13.
World literature on thorium research: A scientometric study based on Science Citation Index 总被引:1,自引:0,他引:1
Summary This paper attempts to highlight quantitatively the growth and development of world literature on thorium in terms of publication
output as per Science Citation Index (1982-2004). During 1982-2004 a total of 3987 papers were published by the scientists
in the field 'thorium'. The average number of publications published per year were 173. The highest number of papers 249 were
published in 2001. The spurt in the literature output was reported during 1991-2004.There were 94 countries involved in the
research in this field. USA is the top producing country with 1000 authorships (21.11%) followed by India with 498 authorships
(10.51%). Authorship and collaboration trend was towards multi-authored papers. Intensive collaboration was found during 1990-2004.One
paper 'Nuclear Instruments and Methods in Physics Research - A 406 (3) (1998) 411-426' had 64 collaborators. There were 586 international collaborative papers. Bilateral collaboration accounted
for 80.55 percent of total collaborative papers. Bhabha Atomic Research Centre (India) topped the list with 153 authorships
followed by Los Alamos National Laboratory (USA) with 105 authorships.The most preferred journals by the scientists were: Journal of Radioanalytical Nuclear Chemistry with 181 papers, Radiochimica Acta with 139 papers, Journal of Radioanalytical Nuclear Chemistry -Articles with 127 papers, Geochimica Cosmochimica Acta with 96 papers, Health Physics with 91 papers, Applied Radiation and Isotopes with 88 papers, Journal of Alloys and Compounds with 65 papers, Earth and Planetary Science letters with 59 papers and Chemical Geology, Indian Journal of Chemistry -A, Radiation Protection Dosimetry with 55 papers each. English was the most predominant language used by the scientists for communication. The high frequency
keywords were: Thorium (500), Uranium (284), Separation (94), Thorium Isotopes (90), Thorium (IV) (86), Seawater (73), Solvent
Extraction (70), and Rare Earth Elements (68). 相似文献
14.
15.
Judit Bar-Ilan 《Scientometrics》2010,83(3):809-824
Google Scholar and Scopus are recent rivals to Web of Science. In this paper we examined these three citation databases through
the citations of the book “Introduction to informetrics” by Leo Egghe and Ronald Rousseau. Scopus citations are comparable
to Web of Science citations when limiting the citation period to 1996 and onwards (the citation coverage of Scopus)—each database
covered about 90% of the citations located by the other. Google Scholar missed about 30% of the citations covered by Scopus
and Web of Science (90 citations), but another 108 citations located by Google Scholar were not covered either by Scopus or
by Web of Science. Google Scholar performed considerably better than reported in previous studies, however Google Scholar
is not very “user-friendly” as a bibliometric data collection tool at this point in time. Such “microscopic” analysis of the
citing documents retrieved by each of the citation databases allows us a deeper understanding of the similarities and the
differences between the databases. 相似文献
16.
K. Kaneiwa J. Adachi M. Aoki T. Masuda A. Midorikawa A. Tanimura S. Yamazaki 《Scientometrics》1988,13(3-4):125-133
In this paper,Nature andScience, the two distinguished multi-disciplinary scientific journals were compared placing emphasis on their internationality. The items investigated were as follows. A general comparison: 1. number of authors per article, 2. distribution of countries to which first authors' institutions belong, 3. distribution of main discplines studied by first authors, 4. time-lag between the date of receipt of an article by the editor and the date of its publication. B. the position with regard to Japanese author: 1. number of Japanese authors, 2. relationship between the ranking of a Japanese author in the list of authors' names and the country where his institution is located, 3. relationship between the time-lag stated in A-4 and the items stated in B-2. As a result, it can be said thatNature is a more highly international journal thanScience. 相似文献
17.
From the application point of view, this article introduces the framework of the Chinese Social Science Citation Index (CSSCI). It expounds the idea of designing the CSSCI system, and its major functions and features in particular. The data organization as well as data encoding methods of the CSSCI system is well explained. Moreover, this article elaborates on how the citation index data can be used in analyzing discipline features, exploring research hotspots and developing trends, identifying important academic works and constructing academic network. Such efforts are supposed to help the readers better understand the application value of citation index system. It also provides the academic circle with a new understanding of citation index system. 相似文献
18.
Independent publications from Serbia in the Science Citation Index Expanded: a bibliometric analysis
This paper presents a bibliometric analysis of articles from the Republic of Serbia in the period 2006–2012 that are indexed in the Thomson Reuters SCI-EXPANDED database. The Republic of Serbia is a small country in Europe with about seven million citizens that became an independent country in 2006. Since 2006, Serbian science has achieved some recognition. Analysis included 14,293 articles with authors all from Serbia. Distribution of published articles in the Web of Science categories, journals, scientific-research institutions and researchers were analysed. Most cited independent research articles from Serbia were also analysed. The Y-index indicator for rating the productivity of researchers and institutions was used. This indicator takes into account the contribution of the researcher to the published results. The results showed that the productivity of articles from Serbia is significant compared to neighbouring Serbian countries, taking into account the number of researchers in these countries, their GDPs and the percentages of GDPs spent on research. 相似文献
19.
I. F. Aguillo 《Scientometrics》1996,35(2):279-282
The critical evaluation of scientific productivity during, last years has been done with the help of the Journal Citation Reports ranks of journals. The relative performance of each journal was derived from a simple calculation called Impact Factor. Such measure has been widely criticized by scientometricians, but alternative proposals were nerver adopted due perhaps to their complexity, but also to economic limitations. For the informetric purposes this situation has led to a worrying lack of standardization and, worst of all, makes useless many studies for comparative purposes. In order to enhance the comparative value of the impact factor we develop a new easy method that increases the time period used for its calculation. Such new index has advantages over the old one. 相似文献
20.
A bibliometric study of the trend in articles related to eutrophication published in Science Citation Index 总被引:1,自引:0,他引:1
A keyword analysis was applied in this work to evaluate research trends of eutrophication papers published between 1991 and 2010 in any journal of all the subject categories of the Science Citation Index compiled by Institute for Scientific Information, Philadelphia, USA. Eutrophication was used as a keyword to search parts of titles, abstracts, or keywords. The published output analysis showed that eutrophication research steadily increased over the past 20 years and the annual publication output in 2008, 2009, 2010 were about four times that of 1991. The whole paper published by China ranked at 3rd, but these papers’ IF were lower than the average of the world. “Water Framework Directive” and “Life Cycle Assessment” were two of the most frequently used author keywords in the period between 1999 and 2010 whilst they did not appear before 1998. These new conception indicated eutrophication research trend was changing to policy and management from technological researches. 相似文献