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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 . As a journal-level metric, it is frequently used as a proxy ...
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. JCR was originally published as a part of the Science ...
The values for Nature journals lie well above the expected ca. 1:1 linear dependence because those journals contain a significant fraction of editorials. CiteScore was designed to compete with the two-year JCR impact factor, which is currently the most widely used journal metric. [7] [8] Their main differences are as follows: [9]
The SJR indicator is a free journal metric inspired by, and using an algorithm similar to, PageRank . The SJR indicator computation is carried out using an iterative algorithm that distributes prestige values among the journals until a steady-state solution is reached. The SJR algorithm begins by setting an identical amount of prestige to each ...
The journal is abstracted and indexed in: Chemical Abstracts Service; Current Contents/Physical, Chemical & Earth Sciences; Scopus; Science Citation Index Expanded; According to the Journal Citation Reports, the journal has a 2021 impact factor of 6.389, ranking it 48th out of 179 journals in the category "Chemistry, Multidisciplinary" and 95th out of 345 journals in the category "Materials ...
Nature Communications is a peer-reviewed, open access, scientific journal published by Nature Portfolio since 2010. It is a multidisciplinary journal that covers the natural sciences, including physics, chemistry, earth sciences, medicine, and biology. The journal has editorial offices in London, Berlin, New York City, and Shanghai.
The New England Journal of Medicine ( NEJM) is a weekly medical journal published by the Massachusetts Medical Society. Founded in 1812, the journal is among the most prestigious peer-reviewed medical journals. [1] Its 2023 impact factor was 96.2, ranking it 2nd out of 168 journals in the category "Medicine, General & Internal".
The journal is archived in PubMed Central (PMC) and is indexed in Index Medicus/MEDLINE, PubMed, Meta, EMBASE, BIOSIS Previews, and Scopus. According to Scopus/Scimago Journal Rank (2015), Aging is ranked number 3 on Cites/Docs (2 years) in the Aging category. The journal has a 2021 impact factor of 5.955.