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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.
When science journals were evaluated with a PageRank-based algorithm, however, the Journal of Biological Chemistry ranked first. [7] Using the Eigenfactor metric, the Journal of Biological Chemistry ranked 5th among all ISI-indexed journals in 2010. [8] The impact factor of the journal in 2021 was 5.486. [9]
According to Journal Citation Reports, the journal has a 2022 impact factor of 9.4. [1] PNAS is the second most cited scientific journal, with more than 1.9 million cumulative citations from 2008 to 2018. [2] In the past, PNAS has been described variously as "prestigious", [3] [4] "sedate", [5] "renowned" [6] and "high impact". [7]
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.
Nature Astronomy is a peer reviewed scientific journal published by Nature Portfolio. [1] [2] It was first published in January 2017 (volume 1, issue 1), although the first content appeared online in December 2016. The editor-in-chief is May Chiao, who is a full-time professional editor employed by the journal. [3]
All submissions go through a pre-publication review by a member of the board of academic editors, who can elect to seek an opinion from an external reviewer. In January 2010, the journal was included in the Journal Citation Reports and received its first impact factor of 4.4. Its 2023 impact factor is 2.9.
Impact factor. 4.060 (2021) ... The American Journal of Translational Research is an open-access medical journal published ... the journal has a 2021 impact factor of ...
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. [6]