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IJSER.org | Impact Factor of IJSER | Journal Impact Factor
IJSER.org – IJSER Impact Factor
The impact factor (IF) of an academic journal is a measure reflecting the average number of citations to recent articles published in the journal. It is frequently used as a proxy for
the relative importance of a journal within its field, with journals
with higher impact factors deemed to be more important than those with
lower ones. The impact factor was devised by Eugene Garfield, the founder of the Institute for Scientific Information. Impact factors are calculated yearly starting from 1975 for those journals that are indexed in the Journal Citation Reports.
Calculation
In any given year, the impact factor of a
journal is the average number of citations received per paper published
in that journal during the two preceding years.[1] For
example, if a journal has an impact factor of 3 in 2008, then its
papers published in 2006 and 2007 received 3 citations each on average
in 2008. The 2008 impact factor of a journal would be calculated as
follows:
- A = the number of times that articles published in that journal in 2006 and 2007, were cited by articles in indexed journals during 2008.
- B = the total number of “citable items” published by that journal in 2006 and 2007. (“Citable items” are usually articles, reviews, proceedings, or notes; not editorials or letters to the editor.)
- 2008 impact factor = A/B.
(Note that 2008 impact factors are actually
published in 2009; they cannot be calculated until all of the 2008
publications have been processed by the indexing agency.)
New journals, which are indexed from their
first published issue, will receive an impact factor after two years of
indexing; in this case, the citations to the year prior to Volume 1, and
the number of articles published in the year prior to Volume 1 are
known zero values. Journals that are indexed starting with a volume
other than the first volume will not get an impact factor until they
have been indexed for three years. Annuals and other irregular
publications sometimes publish no items in a particular year, affecting
the count. The impact factor relates to a specific time period; it is
possible to calculate it for any desired period, and the Journal Citation Reports (JCR) also includes a five-year impact factor.
To know details of International Journal of Scientific and Engineering Research (IJSER) , please visit IJSER journal website.
Direct Link to IJSER.org website
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