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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.
The impact factor (IF) or journal impact factor (JIF) ... BCI, CPCI—while JIF is only available for the SCIE and SSCI; however, starting in June 2023, ...
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]
The journal is abstracted and indexed in the Chemical Abstracts Service, [6] the Science Citation Index Expanded, and selectively in Index Medicus/MEDLINE/PubMed. [7] According to the Journal Citation Reports, the journal has a 2023 impact factor 3.8. [8]
Founded in 1951, the journal covers the fundamental research and technical advances in vacuum engineering, materials science and surface science. Its editor-in-chief is Lars Hultman (Linköping University). [1] According to the Journal Citation Reports, the journal has a 2023 impact factor of 3.8. [2]
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]
As of 2023, Annual Review of Marine Science is being published as open access, under the Subscribe to Open model. [1] As of 2024, Journal Citation Reports gives the journal a 2023 impact factor of 14.3, ranking it first out of 119 in the category "Marine & Freshwater Biology", first out of 65 in the category "Oceanography", and first out of 101 ...
As of 2023, Annual Review of Medicine is being published as open access, under the Subscribe to Open model. [1] As of 2024, Journal Citation Reports gives the journal a 2023 impact factor of 15.1, ranking it third of 189 titles in the category "Medicine, Research & Experimental". [2]