Impact Factor of publications

Lecture by Dr. C. B. Bhatt, VGEC, Chandkheda, A-2, GTU, Chandkheda (26/11/2016 – time: 02.30 pm – 03.15 pm)

The text below is  from taken notes from the lecture.

The Impact Factor (IF)

  • It is a measure reflecting the average number of citations to articles published in science and social science journals.
  • Science Citation Index (SCI) is published by Thomson Reuters. (
  • Indexes of selected journals
    • > 8000 science journals
    • > 3000 social science journals
    • > 1800 arts and humanities journals
  • Impact factors are listed in JCR (Journal Citation Reports)
    • For reports, subscription charges are applicable
  • The Impact Factor is calculated based on a 2-year window. One year reference period and 2-year citation window
    • A / B = 2011 impact factor
    • A = indexed journals cited the number of times articles published in 209 and 2010 during 2011
    • B = the total number of “citable items” published by that journal in 2009 and 2010. (Citation items are usually articles, reviews, proceedings, or notes, not editorials or letters-to-the-editor)
    • 2011 impact factors were published in 2012; they cannot be calculated until the indexing agency has processed all of 2011 publications.
  • Criticism of impact factor
    • ISI is indexing about 13000 journals published in English language only; some disciplines are especially poorly covered
    • Short (two years) snapshot of journal
    • JCR now also include the 5-year data
    • IF is an average; not all articles are equally well-cited as it is manipulative as it includes self-citations
    • Only include “citable” articles in the denominator or the equation i.e. articles and reviews
      • Editors may skew IF by increasing the number of review articles, which bring in more citations (increasing the numerator)
      • Or by increasing the number of “news” items which are cited but not considered “citable.”

Immediacy Index

  • It is a measure of how topical and urgent work published in a scientific journal is
  • Along with the better known IF measure, it is calculated each year
  • It is calculated based on the papers published in a journal in a single calendar year.
  • Search more

Eigen Factor

  • The Eigen Factor Project is a non-commercial academic research project sponsored by the Bergstrom Lab in the Department of Biology at the University of Washington
  • As with JCR, only ISI journals are ranked
  • Uses “all” ISI data, analyzed differently
    • All cited and citing reference (so includes citations from non-ISI journals, books, dissertations and such)
  • It uses Google’s page rank algorithm
  • Looks at five-year data
  • Higher EF score is better
  • EF score sum is 100.
  • For more, refer to presentation below

Article Influence

  • It measures the average influence, per article, of the papers in a journal.
  • As such, it is comparable to Thomson Scientific’s Impact Factor
  • For more, refer to presentation below

Comments on Article Influence

  • For more, refer to presentation below

SCImago Journal Rank (SJR)

  • It is based on the Scopus citation data divided by the number of articles published by a journal over three years
  • Similar to the EF
  • Self-citations are not included
  • it ranks 3,042 institutes across the world
  • it provides 5 indicators of research performance
  • For more, refer to presentation below

Quality indices for author (Journal)


  • Proposed by JE Hirsch as an index of quantifying an individual’s scientific research output
  • It combines assessment of both quantity and quality (impact, or citations)
  • It is based on the distribution of citations received by a given researcher’s publications
  • Definition: A scientist has index h if h of his /her Np papers have at least h citations… complete it
  • Get an example of calculating the h-index
  • It is automatically calculated by
    • Web of Science
    • Scopus
    • Google Scholar


  • It is an index for quantifying scientific productivity based on publication record. It was suggested in 2006 by Leo Egghe
  • For more, refer to presentation below

H-b Index

It is an extension of h-index

Michael Banks develops it

  • For more, refer to presentation below

Creative Commons License
Impact Factor of publications by Bhasker Vijaykumar Bhatt is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. It means that you are free to use the above text and references as you wish to, after appropriate citation.

Lets learn

Prof. Bhasker Bhatt is a Town Planner and Civil Enginee. He has been very active with design thinking based training program as an expert conducting workshops.He completed his masters in town planning with a research on Road Safety Audit. As far as academics are concerned, he has been excellent and awarded with several Gold Medals during Diploma, Degree and Post Graduate studies. He had provided his services in the field of consultancy at national as well as international level through working with multilateral organisations such as The World Bank and United Nations Development Project-India. Research areas of him include Road Safety, Urban Planning, Infrastructure Planning, Statistical Analysis Techniques, GIS and Climate Change effects in urban areas.He is actively associated with several professional organisations and serving various prestigious posts for better interaction among educational, engineering and planning fraternity. He has more than 6 years’ experience in technical consultancy and about 6 years of engineering teaching. He has guided about 23 PG Dissertations and 10+ UG projects as well as a few AMIE projects. Towards continuous upgradations of skills and technological advancements, he has attempted 50+ events consisting of workshops, training programs, seminars, conventions, and symposiums. He frequently organises events for students and faculty members that ignite active academic upgradations and industrial interaction. He has published more than 56 technical research papers in conferences and journals. Several of his research articles are awarded with Best Paper honor during conferences. Most of all his works are available online for reference along with projects and dissertation reports. He is fascinated to conduct academic and exposure trips for students through putting his network of acquaintances to best of use.Prof. Bhasker is a recipient of “Best Section Management Committee Member of ISTE Gujarat Section 2015”. Also, he was honoured by “Pedagogical Innovation Award 2015” by the GTU for his efforts and contributions in engineering education. At the GTU he was a Master Trainer for Faculty Development Programs conducted at the University wherein he trained more than 350+ teachers of diverse engineering discipline. 1500+ students have attended his sessions on Design Thinking approach that ignites the engineering insights and motivates the engineering brain to increase capabilities, drastically. Recently he has been active with Startup Weekend Surat (powered by Google Inc.) as a trainer. He has developed his own learning portal, for learners - completely free of cost to best serve the purpose of spreading knowledge.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.