Two common databases that track systematically citation data of journals and compute measures of quality based on these data are Journal Citation Reports in ISI Web of Knowledge (JCR), and SCImago Journal & Country Rank (SCImago), which is based on the Scopus database. JournalsRanking (JRank) is the digital portal developed by iMaQ Technologies Pvt. Ltd in 2015 containing list of all international journals indexed in ISI-JCR and Scopus-SJR based on the current impact factor (IF) and Quartiles (Q) given by Thomson Reuters and Scopus, respectively.
The JRank also gives detailed information about the journal such as country of journal publishing, impact factor history, frequency of journal publishing, active web link etc. All lists of journals based on subjects can also be viewed using JRank portal.Consequently, several journal-level metrics have been proposed, most citation-based:
Journal Impact Factor discipline rankings lists all of the journals in a discipline based on their JIF. Used by Clarivate Analytics, assigns a numerical value to a journal based on the number of citations an "average article" in that journal receives over a set time period.
JIF = the number of times articles published in the previous 2 years have been cited in the year of reporting, divided by the number of citable items.n any given year, the impact factor of a journal is the number of citations received in that year by articles published in that journal during the two preceding years, divided by the total number of articles published in that journal during the two preceding years.
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.
A rating of the total importance of a scientific journal according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Developed by scholars at the University of Washington, the Eigenfactor is a variation of the Impact Factor in which some citations are weighted more heavily than others based on the rank of the journal they come from.
Eigenfactor.org is a freely accessible web site that offers two ways to rank journals: by "Eigenfactor" or by "Article Influence" (see "Impact Factors" at right). Eigenfactor ranks the journals in the Thomson-Reuters Journal Citation Reports collection, plus more than 100,000 other journals. This resource ranks journals and shows their influence in particular subject areas as well as showing visualizations of various data points. Data comes from Thomson Scientific's Journal Citation Reports.
SCImago Journal RankThe SCImago Journal & Country Rank is a portal that includes the journals and country scientific indicators developed from the information contained in the SCOPUS database. A measure of scientific influence of scholarly journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from.
The SJR indicator is a variant of the eigenvector centrality measure used in network theory. Such measures establish the importance of a node in a network based on the principle that connections to high-scoring nodes contribute more to the score of the node. The SJR indicator, which is inspired by the PageRank algorithm, has been developed to be used in extremely large and heterogeneous journal citation networks. It is a size-independent indicator and its values order journals by their "average prestige per article" and can be used for journal comparisons in science evaluation processes.
SCImago Journal and Country Rankings (SJR) is a freely accessible web site that ranks more than 21,500 journals from the Scopus database. SCImago was developed by a group of researchers in Spain. You can sort journals by discipline or country of origin, and the results can be downloaded into an Excel document.
SCOPUS - SNIP and SJR metrics
SNIP (Source Normalized Impact per Paper) and SJR (SCImago Journal Rank) are both powered by SCOPUS and offer the value of context in the world of citations. Scopus identifies scientific articles in over 14,000 peer-reviewed journals from more than 4,000 international publishers. Selecting "References" in the search options will bring up a list of articles that cited the search terms. Also has options to see what other articles cited a particular articles and citation patterns over time.
Scopus also offers author profiles which cover affiliations, number of publications and their bibliographic data, references, and details on the number of citations each published document has received. It has alerting features that allows registered users to track changes to a profile and a facility to calculate authors' h-index.
Source normalized impact per paper (SNIP) – a factor released in 2012 by Elsevier based on Scopus to estimate impact. The measure is calculated as SNIP=RIP/(R/M), where RIP=raw impact per paper, R = citation potential and M = median database citation potential.
Google Scholar Metrics
Google Scholar Metrics allows authors to view journal rankings and ratings by various h-indeces. Journal ranking can be viewed for the top 100 publications in 9 different languages, or by broad subject research areas and numerous subcategories. Scholar Metrics uses those articles published between 2009 and 2013 and citation from all articles indexed in Google Scholar.
Google Scholar has a "metrics" feature that offers a list of the top 100 journals in various disciplines by citation count. However,some of the entities it counts as "journals" are actually databases (e.g. RePEc and ArXiv), so it's possible that some journals' rankings are inflated by having their citations counted twice. Google Scholar Metrics can also be searched by keyword, pulling up an informal ranking list of journals with that word in the title. Below is a chart of the first few journals with the word "interdisciplinary" in the title, sorted by H5-index.
Usually used as a measure of scientific productivity and the scientific impact of an individual scientist, but can also be used to rank journals. Developed by Jorge Hirsch at UC San Diego, the h-index measures the impact of a particular scholarly author, rather than a journal, by a calculation that involves the number of articles that author has published and the number of times those articles have been cited. A high h-index indicates both that an author has both published widely and been cited widely.
The definition of the index is that a scholar with an index of h has published h papers each of which has been cited in other papers at least h times.Thus, the h-index reflects both the number of publications and the number of citations per publication. The index is designed to improve upon simpler measures such as the total number of citations or publications. The index works properly only for comparing scientists working in the same field; citation conventions differ widely among different fields.
A free service from Elsevier, CiteScore operates in a similar fashion to the Impact Factor but uses different metrics. Because it includes reviews, editorials, and other items besides research articles in its calculations, it can lead to markedly different results from Impact Factor. Only publications indexed in Scopus receive CiteScores.
CiteScore metrics are part of the Scopus basket of journal metrics that includes SNIP (Source Normalized Impact per Paper), SJR (SCImago Journal Rank), citation- and document- counts and percentage cited. The integration of these metrics into Scopus provides insights into the citation impact of more than 22,220 titles.