Diese Datenbank enthält über 40.000 Dokumente zu Themen aus den Bereichen Formalerschließung – Inhaltserschließung – Information Retrieval.
© 2015 W. Gödert, TH Köln, Institut für Informationswissenschaft / Powered by litecat, BIS Oldenburg (Stand: 04. Juni 2021)
1Chawla, D.S.: Hundreds of 'predatory' journals indexed on leading scholarly database.[08.02.2021].
Abstract: Scopus has stopped adding content from most of the flagged titles, but the analysis highlights how poor-quality science is infiltrating literature.
Inhalt: doi: https://doi.org/10.1038/d41586-021-00239-0.
2Thelwall, M. ; Sud, P.: Do new research issues attract more citations? : a comparison between 25 Scopus subject categories.
In: Journal of the Association for Information Science and Technology. 72(2021) no.3, S.269-279.
Abstract: Finding new ways to help researchers and administrators understand academic fields is an important task for information scientists. Given the importance of interdisciplinary research, it is essential to be aware of disciplinary differences in aspects of scholarship, such as the significance of recent changes in a field. This paper identifies potential changes in 25 subject categories through a term comparison of words in article titles, keywords and abstracts in 1 year compared to the previous 4 years. The scholarly influence of new research issues is indirectly assessed with a citation analysis of articles matching each trending term. While topic-related words dominate the top terms, style, national focus, and language changes are also evident. Thus, as reflected in Scopus, fields evolve along multiple dimensions. Moreover, while articles exploiting new issues are usually more cited in some fields, such as Organic Chemistry, they are usually less cited in others, including History. The possible causes of new issues being less cited include externally driven temporary factors, such as disease outbreaks, and internally driven temporary decisions, such as a deliberate emphasis on a single topic (e.g., through a journal special issue).
Inhalt: Vgl.: https://asistdl.onlinelibrary.wiley.com/doi/10.1002/asi.24401.
3Araújo, P.C. de ; Gutierres Castanha, R.C. ; Hjoerland, B.: Citation indexing and indexes.
In: Knowledge organization. 48(2021) no.1, S.72-101.
(Reviews of Concepts in Knowledge Organization)
Abstract: A citation index is a bibliographic database that provides citation links between documents. The first modern citation index was suggested by the researcher Eugene Garfield in 1955 and created by him in 1964, and it represents an important innovation to knowledge organization and information retrieval. This article describes citation indexes in general, considering the modern citation indexes, including Web of Science, Scopus, Google Scholar, Microsoft Academic, Crossref, Dimensions and some special citation indexes and predecessors to the modern citation index like Shepard's Citations. We present comparative studies of the major ones and survey theoretical problems related to the role of citation indexes as subject access points (SAP), recognizing the implications to knowledge organization and information retrieval. Finally, studies on citation behavior are presented and the influence of citation indexes on knowledge organization, information retrieval and the scientific information ecosystem is recognized.
Themenfeld: Citation indexing
Objekt: Science Citation Index ; Google Scholar ; Web of Science ; Shepard's Citations ; Scopus ; Microsoft Academic ; Crossref ; Dimensions
4Tay, A.: ¬The next generation discovery citation indexes : a review of the landscape in 2020.[11.11.2020].
Abstract: Conclusion There is a reason why Google Scholar and Web of Science/Scopus are kings of the hills in their various arenas. They have strong brand recogniton, a head start in development and a mass of eyeballs and users that leads to an almost virtious cycle of improvement. Competing against such well established competitors is not easy even when one has deep pockets (Microsoft) or a killer idea (scite). It will be interesting to see how the landscape will look like in 2030. Stay tuned for part II where I review each particular index.
Themenfeld: Citation indexing
Objekt: Web of Science ; Google Scholar ; Scopus ; Dimensions ; Semantic Scholar ; Microsoft Academic
5Chen, L. ; Fang, H.: ¬An automatic method for ex-tracting innovative ideas based on the Scopus® database.
In: Knowledge organization. 46(2019) no.3, S.171-186.
Abstract: The novelty of knowledge claims in a research paper can be considered an evaluation criterion for papers to supplement citations. To provide a foundation for research evaluation from the perspective of innovativeness, we propose an automatic approach for extracting innovative ideas from the abstracts of technology and engineering papers. The approach extracts N-grams as candidates based on part-of-speech tagging and determines whether they are novel by checking the Scopus® database to determine whether they had ever been presented previously. Moreover, we discussed the distributions of innovative ideas in different abstract structures. To improve the performance by excluding noisy N-grams, a list of stopwords and a list of research description characteristics were developed. We selected abstracts of articles published from 2011 to 2017 with the topic of semantic analysis as the experimental texts. Excluding noisy N-grams, considering the distribution of innovative ideas in abstracts, and suitably combining N-grams can effectively improve the performance of automatic innovative idea extraction. Unlike co-word and co-citation analysis, innovative-idea extraction aims to identify the differences in a paper from all previously published papers.
Inhalt: DOI:10.57 71/0943-7444-2019-3-171.
Themenfeld: Informetrie ; Computerlinguistik
6Gantman, E.R. ; Dabós, M.P.: Research output and impact of the fields of management, economics, and sociology in Spain and France : an analysis using Google Scholar and Scopus.
In: Journal of the Association for Information Science and Technology. 69(2018) no.8, S.1054-1066.
Abstract: Because of a greater coverage of documentary sources in many languages that is greater than that of traditional bibliographic databases, Google Scholar is an ideal tool for examining the social sciences in non-Anglophone countries. We have therefore used it to study the scholarly output and impact of three scientific disciplines, management, economics, and sociology, in Spain and France, comparing some of the results with those retrieved with Scopus. Our findings show that scientific articles are the predominant form of scholarly communication in Google Scholar for our selected fields and countries. In addition, our results indicate that in Google Scholar the vernacular languages of each country are more used than English in all cases, but economics in France. The opposite occurs in Scopus, except for the case of sociology articles in France We also show that books receive on average more citations than other published documents in Google Scholar. Finally, we demonstrate that publishing in English is associated with greater scholarly impact, except for the case of France in Google Scholar for articles in sociology and books in the three fields.
Inhalt: Vgl.: https://onlinelibrary.wiley.com/doi/abs/10.1002/asi.24020.
Wissenschaftsfach: Wirtschaftswissenschaften ; Soziologie
Objekt: Google Scholar ; Scopus
Land/Ort: F ; ES
7Abdelkareem, M.A.A.: In terms of publication index, what indicator is the best for researchers indexing, Google Scholar, Scopus, Clarivate or others?.
Abstract: I believe that Google Scholar is the most popular academic indexing way for researchers and citations. However, some other indexing institutions may be more professional than Google Scholar but not as popular as Google Scholar. Other indexing websites like Scopus and Clarivate are providing more statistical figures for scholars, institutions or even journals. On account of publication citations, always Google Scholar shows higher citations for a paper than other indexing websites since Google Scholar consider most of the publication platforms so he can easily count the citations. While other databases just consider the citations come from those journals that are already indexed in their database
Themenfeld: Retrievalalgorithmen ; Informetrie
Objekt: Google Scholar ; Scopus ; Clarivate
8Maflahi, N. ; Thelwall, M.: When are readership counts as useful as citation counts? : Scopus versus Mendeley for LIS journals.
In: Journal of the Association for Information Science and Technology. 67(2016) no.1, S.191-199.
Abstract: In theory, articles can attract readers on the social reference sharing site Mendeley before they can attract citations, so Mendeley altmetrics could provide early indications of article impact. This article investigates the influence of time on the number of Mendeley readers of an article through a theoretical discussion and an investigation into the relationship between counts of readers of, and citations to, 4 general library and information science (LIS) journals. For this discipline, it takes about 7 years for articles to attract as many Scopus citations as Mendeley readers, and after this the Spearman correlation between readers and citers is stable at about 0.6 for all years. This suggests that Mendeley readership counts may be useful impact indicators for both newer and older articles. The lack of dates for individual Mendeley article readers and an unknown bias toward more recent articles mean that readership data should be normalized individually by year, however, before making any comparisons between articles published in different years.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23369/abstract.
Wissenschaftsfach: Bibliothekswesen ; Informationswissenschaft
Objekt: Mendeley ; Scopus
9Leydesdorff, L. ; Moya-Anegón, F. de ; Nooy, W. de: Aggregated journal-journal citation relations in scopus and web of science matched and compared in terms of networks, maps, and interactive overlays.
In: Journal of the Association for Information Science and Technology. 67(2016) no.9, S.2194-2211.
Abstract: We compare the network of aggregated journal-journal citation relations provided by the Journal Citation Reports (JCR) 2012 of the Science Citation Index (SCI) and Social Sciences Citation Index (SSCI) with similar data based on Scopus 2012. First, global and overlay maps were developed for the 2 sets separately. Using fuzzy-string matching and ISSN numbers, we were able to match 10,524 journal names between the 2 sets: 96.4% of the 10,936 journals contained in JCR, or 51.2% of the 20,554 journals covered by Scopus. Network analysis was pursued on the set of journals shared between the 2 databases and the 2 sets of unique journals. Citations among the shared journals are more comprehensively covered in JCR than in Scopus, so the network in JCR is denser and more connected than in Scopus. The ranking of shared journals in terms of indegree (i.e., numbers of citing journals) or total citations is similar in both databases overall (Spearman rank correlation ??>?0.97), but some individual journals rank very differently. Journals that are unique to Scopus seem to be less important-they are citing shared journals rather than being cited by them-but the humanities are covered better in Scopus than in JCR.
Inhalt: Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23372/full.
Objekt: Scopus ; Web of science
10Casarin, H.C.S. ; Mattos, N.B. de: Child's information behavior in the domain of information science : an analysis through the Scopus database.
In: Knowledge organization for a sustainable world: challenges and perspectives for cultural, scientific, and technological sharing in a connected society : proceedings of the Fourteenth International ISKO Conference 27-29 September 2016, Rio de Janeiro, Brazil / organized by International Society for Knowledge Organization (ISKO), ISKO-Brazil, São Paulo State University ; edited by José Augusto Chaves Guimarães, Suellen Oliveira Milani, Vera Dodebei. Würzburg : Ergon Verlag, 2016. S.469-476.
(Advances in knowledge organization; vol.15)
11Miguel, S. ; Chinchilla-Rodriguez, Z. ; Moya-Anegón, F. de: Open access and Scopus : a new approach to scientific visibility from the standpoint of access.
In: Journal of the American Society for Information Science and Technology. 62(2011) no.6, S.1130-1145.
Abstract: The last few years have seen the emergence of several open access (OA) options in scholarly communication, which can be grouped broadly into two areas referred to as gold and green roads. Several recent studies have shown how large the extent of OA is, but there have been few studies showing the impact of OA in the visibility of journals covering all scientific fields and geographical regions. This research presents a series of informative analyses providing a broad overview of the degree of proliferation of OA journals in a data sample of about 17,000 active journals indexed in Scopus. This study shows a new approach to scientific visibility from a systematic combination of four databases: Scopus, the Directory of Open Access Journals, Rights Metadata for Open Archiving.
12García, J.A. ; Rodriguez-Sánchez, R. ; Fdez-Valdivia, J.: Ranking of the subject areas of Scopus.
In: Journal of the American Society for Information Science and Technology. 62(2011) no.10, S.2013-2023.
Abstract: Here, we show a longitudinal analysis of the ranking of the subject areas of Elsevier's Scopus. To this aim, we present three summary measures based on the journal ranking scores for academic journals in each subject area. This longitudinal study allows us to analyze developmental trends over times in different subject areas with distinct citation and publication patterns. We evaluate the relative performance of each subject area by using the overall prestige for the most important journals with ranking score above a given threshold (e.g., in the first quartile) as well as the overall prestige gap for the less important journals with ranking score below a given threshold (e.g., below the top 10 journals). Thus, we propose that it should be possible to study different subject areas by means of appropriate summary measures of the journal ranking scores, which provide additional information beyond analyzing the inequality of the whole ranking-score distribution for academic journals in each subject area. It allows us to investigate whether subject areas with high levels of overall prestige for the first quartile journals also tended to achieve low levels of overall prestige gap for the journals below the top 10.
13Kousha, K. ; Thelwall, M. ; Rezaie, S.: Assessing the citation impact of books : the role of Google Books, Google Scholar, and Scopus.
In: Journal of the American Society for Information Science and Technology. 62(2011) no.11, S.2147-2164.
Abstract: Citation indictors are increasingly used in some subject areas to support peer review in the evaluation of researchers and departments. Nevertheless, traditional journal-based citation indexes may be inadequate for the citation impact assessment of book-based disciplines. This article examines whether online citations from Google Books and Google Scholar can provide alternative sources of citation evidence. To investigate this, we compared the citation counts to 1,000 books submitted to the 2008 U.K. Research Assessment Exercise (RAE) from Google Books and Google Scholar with Scopus citations across seven book-based disciplines (archaeology; law; politics and international studies; philosophy; sociology; history; and communication, cultural, and media studies). Google Books and Google Scholar citations to books were 1.4 and 3.2 times more common than were Scopus citations, and their medians were more than twice and three times as high as were Scopus median citations, respectively. This large number of citations is evidence that in book-oriented disciplines in the social sciences, arts, and humanities, online book citations may be sufficiently numerous to support peer review for research evaluation, at least in the United Kingdom.
Objekt: Google Books ; Google Scholar ; Scopus
14Calculating the h-index : Web of Science, Scopus or Google Scholar?.
Abstract: Gegenüberstellung der Berechnung des h-Index in den drei Tools mit Beispiel Stephen Hawking (WoS: 59, Scopus: 19, Google Scholar: 76)
Objekt: h-index ; Web of Science ; Scopus ; Google Scholar
15Leydesdorff, L. ; Moya-Anegón, F.de ; Guerrero-Bote, V.P.: Journal maps on the basis of Scopus data : a comparison with the Journal Citation Reports of the ISI.
In: Journal of the American Society for Information Science and Technology. 61(2010) no.2, S.352-369.
Abstract: Using the Scopus dataset (1996-2007) a grand matrix of aggregated journal-journal citations was constructed. This matrix can be compared in terms of the network structures with the matrix contained in the Journal Citation Reports (JCR) of the Institute of Scientific Information (ISI). Because the Scopus database contains a larger number of journals and covers the humanities, one would expect richer maps. However, the matrix is in this case sparser than in the case of the ISI data. This is because of (a) the larger number of journals covered by Scopus and (b) the historical record of citations older than 10 years contained in the ISI database. When the data is highly structured, as in the case of large journals, the maps are comparable, although one may have to vary a threshold (because of the differences in densities). In the case of interdisciplinary journals and journals in the social sciences and humanities, the new database does not add a lot to what is possible with the ISI databases.
Themenfeld: Informetrie ; Citation indexing
Objekt: Scopus ; Journal Citation Reports
16Leydesdorff, L. ; Persson, O.: Mapping the geography of science : distribution patterns and networks of relations among cities and institutes.
In: Journal of the American Society for Information Science and Technology. 61(2010) no.8, S.1622-1634.
Abstract: Using Google Earth, Google Maps, and/or network visualization programs such as Pajek, one can overlay the network of relations among addresses in scientific publications onto the geographic map. The authors discuss the pros and cons of various options, and provide software (freeware) for bridging existing gaps between the Science Citation Indices (Thomson Reuters) and Scopus (Elsevier), on the one hand, and these various visualization tools on the other. At the level of city names, the global map can be drawn reliably on the basis of the available address information. At the level of the names of organizations and institutes, there are problems of unification both in the ISI databases and with Scopus. Pajek enables a combination of visualization and statistical analysis, whereas the Google Maps and its derivatives provide superior tools on the Internet.
Themenfeld: Visualisierung ; Data Mining
Objekt: Google Earth ; Google Maps ; Science Citation Index ; Scopus ; Pajek
17Leydesdorff, L. ; Opthof, T.: Scopus's source normalized impact per paper (SNIP) versus a journal impact factor based on fractional counting of citations.
In: Journal of the American Society for Information Science and Technology. 61(2010) no.11, S.2365-2369.
Abstract: Impact factors (and similar measures such as the Scimago Journal Rankings) suffer from two problems: (a) citation behavior varies among fields of science and, therefore, leads to systematic differences, and (b) there are no statistics to inform us whether differences are significant. The recently introduced "source normalized impact per paper" indicator of Scopus tries to remedy the first of these two problems, but a number of normalization decisions are involved, which makes it impossible to test for significance. Using fractional counting of citations-based on the assumption that impact is proportionate to the number of references in the citing documents-citations can be contextualized at the paper level and aggregated impacts of sets can be tested for their significance. It can be shown that the weighted impact of Annals of Mathematics (0.247) is not so much lower than that of Molecular Cell (0.386) despite a five-f old difference between their impact factors (2.793 and 13.156, respectively).
18Archambault, E. ; Campbell, D ; Gingras, Y. ; Larivière, V.: Comparing bibliometric statistics obtained from the Web of Science and Scopus.
In: Journal of the American Society for Information Science and Technology. 60(2009) no.7, S.1320-1326.
Abstract: For more than 40 years, the Institute for Scientific Information (ISI, now part of Thomson Reuters) produced the only available bibliographic databases from which bibliometricians could compile large-scale bibliometric indicators. ISI's citation indexes, now regrouped under the Web of Science (WoS), were the major sources of bibliometric data until 2004, when Scopus was launched by the publisher Reed Elsevier. For those who perform bibliometric analyses and comparisons of countries or institutions, the existence of these two major databases raises the important question of the comparability and stability of statistics obtained from different data sources. This paper uses macrolevel bibliometric indicators to compare results obtained from the WoS and Scopus. It shows that the correlations between the measures obtained with both databases for the number of papers and the number of citations received by countries, as well as for their ranks, are extremely high. There is also a very high correlation when countries' papers are broken down by field. The paper thus provides evidence that indicators of scientific production and citations at the country level are stable and largely independent of the database.
Objekt: Web of Science ; Scopus
19Meho, L.I. ; Sugimoto, C.R.: Assessing the scholarly impact of information studies : a tale of two citation databases - Scopus and Web of Science.
In: Journal of the American Society for Information Science and Technology. 60(2009) no.12, S.2499-2508.
Abstract: This study uses citations, from 1996 to 2007, to the work of 80 randomly selected full-time, information studies (IS) faculty members from North America to examine differences between Scopus and Web of Science in assessing the scholarly impact of the field focusing on the most frequently citing journals, conference proceedings, research domains and institutions, as well as all citing countries. Results show that when assessment is limited to smaller citing entities (e.g., journals, conference proceedings, institutions), the two databases produce considerably different results, whereas when assessment is limited to larger citing entities (e.g., research domains, countries), the two databases produce very similar pictures of scholarly impact. In the former case, the use of Scopus (for journals and institutions) and both Scopus and Web of Science (for conference proceedings) is necessary to more accurately assess or visualize the scholarly impact of IS, whereas in the latter case, assessing or visualizing the scholarly impact of IS is independent of the database used.
Objekt: Scopus ; Web of Science
20Neuhaus, C. ; Daniel, H.-D.: Data sources for performing citation analysis : an overview.
In: Journal of documentation. 64(2008) no.2, S.193-210.
Abstract: Purpose - The purpose of this paper is to provide an overview of new citation-enhanced databases and to identify issues to be considered when they are used as a data source for performing citation analysis. Design/methodology/approach - The paper reports the limitations of Thomson Scientific's citation indexes and reviews the characteristics of the citation-enhanced databases Chemical Abstracts, Google Scholar and Scopus. Findings - The study suggests that citation-enhanced databases need to be examined carefully, with regard to both their potentialities and their limitations for citation analysis. Originality/value - The paper presents a valuable overview of new citation-enhanced databases in the context of research evaluation.
Themenfeld: Informetrie ; Citation indexing
Objekt: Science citation index ; Social sciences citation index ; Arts and humanities citation index ; Chemical Abstracts ; Google Scholar ; Scopus