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A journal's SJR indicator is a numeric value representing the average number of weighted citations received during a selected year per document published in that journal during the previous three years, as indexed by Scopus. Higher SJR indicator values are meant to indicate greater journal prestige.
In any given year, the CiteScore of a journal is the number of citations, received in that year and in previous three years, for documents published in the journal during the total period (four years), divided by the total number of published documents (articles, reviews, conference papers, book chapters, and data papers) in the journal during the same four-year period: [3]
The simplest journal-level metric is the journal impact factor, the average number of citations that articles published by a journal in the previous two years have received in the current year, as calculated by Clarivate. Other companies report similar metrics, such as the CiteScore, based on Scopus.
Scopus is a scientific abstract and citation database, launched by the academic publisher Elsevier as a competitor to older Web of Science in 2004. [1] An ensuing competition between the two databases has been characterized as "intense" and is considered to significantly benefit their users in terms of continuous improvent in coverage, search/analysis capabilities, but not in price.
Journal ranking is widely used in academic circles in the evaluation of an academic journal's impact and quality. Journal rankings are intended to reflect the place of a journal within its field, the relative difficulty of being published in that journal, and the prestige associated with it.
According to the publisher, the index includes "peer-reviewed publications of regional importance and in emerging scientific fields". [1] The ESCI is accessible through the Web of Science, together with other Clarivate indexes. [2] [3] As of June 2021, all journals indexed in ESCI are also included in the Journal Citation Reports.
and several measures derived from these data for a given journal: its impact factor, immediacy index, etc. There are separate editions for the sciences and the social sciences; the 2013 science edition includes 8,411 journals, and the 2012 social science edition contains 3,016 titles.
The SCImago Institutions Rankings (SIR) [1] since 2009 has published its international ranking of worldwide research institutions, the SIR World Report. [2] The SIR World Report is the work of the SCImago Research Group, [3] a Spain-based research organization consist of members from the Spanish National Research Council (CSIC), University of Granada, Charles III University of Madrid ...