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Journal Citation Reports (JCR) is an annual publication by Clarivate. [1] It has been integrated with the Web of Science and is accessed from the Web of Science Core Collection . It provides information about academic journals in the natural and social sciences , including impact factors .
The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate's Web of Science.
The Performance Ranking of Scientific Papers for World Universities (NTU Rankings) [1] is a ranking of world universities compiled by National Taiwan University annually since 2012. [ 2 ] This publication ranks world universities by a certain criteria of scientific paper volume, impact, and performance output.
Tausch, Arno (2023), Bibliometry from a global perspective : library and classroom outreach and the future ranking of political scientists and publishers, Nova Science Publishers, ISBN 9798886978865; Taylor, P., & Braddock, R. (2007). International university ranking systems and the idea of university excellence.
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.
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]
While these journals still did not receive an impact factor until the next year, they did contribute citations to the calculation of other journals' impact factors. [ 4 ] [ 5 ] In July 2022, Clarivate announced that journals in the ESCI obtain an impact factor effective from JCR Year 2022 first released in June 2023.
Rank Country Numbers of scientific publications (2020) Total Per million population 1 China 744042 527 2 United States 624554 1875 3 United Kingdom 198500 2959 4 India