Salient Features of India constitution especially power and functions
H index and beyond
1. what is your impact factor?
April Aultman Becker
Manager, Education, Reference, Outreach
Research Medical Library
2. What is the difference between an Impact Factor and the
Journal of Citation Reports
impact factors rank journals
number of citations divided by number of publications in a year
3. What is the
suggested in 2005 by Jorge E. Hirsch
measures productivity and impact of the published work of a scholar
based on the set of the scientist's most cited papers and the number of citations that they have received in other publications
4. How does the work?
ever-changing
not just the first author
the total number of published papers and the number of citations for each paper
how many of the researcher’s papers have been cited at least once
10. What are the benefits?
relies on citations to your papers
not skewed by a single well-cited, influential paper
not increased by a large number of poorly cited papers
minimizes politics of publication
may be used to compare scientists
may be used to compare departments, programs or groups
11. What are the limitations?
papers before 1996
counts a highly-cited paper regardless of why it’s being referenced
doesn’t account for variations in publications and citations
ignores the number and position of authors on a paper
limits authors by the total number of publications
difficult to increase the h-index the higher it gets
may not be a valid predictor of future performance
12. SciVal Experts
MD Anderson specific
search by last name, department, concept
13. Altmetrics
publications and social media mentions
Impact Story (by National Science Foundation)
Altmetric.com (in Scopus)
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Journals have long been ranked in order of relative “importance” by their journal impact factor through the database Journal of Citation Reports. JCR calculates the impact factors with the number of publications and the number of citations.
JCR through RML
Ranks alphabetically or by subject category
Looking at top 5 in Oncology – why is CA high?
Average IF number is below 6, more like 2.
While most of us would agree that it’s nearly impossible to accurately describe a scientist’s career with a single number, that doesn’t mean metrics that attempt to do so are useless. The h-index, originally described in 2005 by Jorge Hirsch, a physicist at UCSD, as a tool for determining theoretical physicists' relative quality and is sometimes called the Hirsch index or Hirsch number, is a measurement that aims to describe the scientific productivity and impact of a researcher. Like all metrics, the h-index is not perfect; however, it addresses many of the problems associated with the publication process in general and enables some very interesting analyses.
The h-index attempts to measure both the productivity and impact of the published work of a scientist or scholar.
The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications.
In Scopus
the h-index is not a static value; it is calculated live on a set of results each time you look it up.
it does not have to be papers belonging to just one author.
To calculate it, only two pieces of information are required: the total number of papers published (Np) and the number of citations (Nc) for each paper.
So we can ask ourselves, “Have I published one paper that’s been cited at least once?” If so, we’ve got an H-index of one and we can move on to the next question, “Have I published two papers that have each been cited at least twice?” If so, our score is 2 and we can continue to repeat this line of questioning until we can’t answer ‘yes’ anymore.
What if I’ve published 84 documents that have been cited 82 times each? What if they’ve only been cited 5 times each?
Inside
From home (remote)
Databases
Who’s used scopus?
Scopus similar to PubMed, author metrics
Why Depinho’s a good example
Why are there two results here?
What to do if you see this
Author info page
381 docs – can get full text
Cited almost 50k times (so why is his h-index only 114?)
Point out the report corrections features
H-index graph
The index has several advantages over other metrics:
It relies on citations to your papers, not the journals, which is a truer measure of quality
It is not dramatically skewed by a single well-cited, influential paper (unlike total number of citations would be)
It is not increased by a large number of poorly cited papers (unlike total number of papers would be)
It minimizes the politics of publication. A high-impact paper counts regardless of whether or not it’s a top-tier journal
It’s good for comparing scientists within a field at similar stages in their careers
It may be used to compare not just individuals, but also departments, programs or any other group of scientists.
Critics of the metric suggest it is limited in the following ways:
Scopus does not have complete citation information for articles published before 1996. The references are needed to calculate citations; if my article A cites your article B, but Scopus doesn't have references of my article A, well, your B won't show as being cited. There's no danger if you published in 1996 or later because you couldn't have been cited before that time, but if you published in 1982 we may be showing a lower citation count for that article.
It counts a highly-cited paper regardless of why it’s being referenced- eg, for negative reasons
It doesn’t account for variations in average number of publications and citations in various fields (some traditionally publish and cite less than others)
It ignores the number and position of authors on a paper
It limits authors by the total number of publications, so shorter careers are at a disadvantage
It has relatively low resolution in that many scientists end up in the same range since it gets increasingly difficult to increase the h-index the higher it gets (an h-index of 100 corresponds to a minimum of 10,000 citations)
It, like all metrics, is based on data from the past and may not be a valid predictor of future performance. However, in a follow-up publication Jorge Hirsch demonstrated that the h-index is better than other indicators (total papers, total citations, citations per paper) at predicting future scientific achievement.
Another place to find h index and author metrics
Provided by RML
MDA specific, but there are links to sister/partnering institutions/authors
Why does it say h-index of 117 here? Which would an author choose to report out?
Researchers care about what people are saying about their work. Increasingly they need to show the impact of their papers, books and datasets are having beyond just citations. Alternative metrics are web-based metrics that measure the impact of scholarly material. Web-based metrics typically include both publications and data from social media sources.
Some examples of altmetrics tools are:
Impact Story is a free tool supported by the National Science Foundation which allows you to upload articles, datasets, software and other products using Google Scholar, ORCID or PMID’s. Impact Story reports altmetrics and traditional citation counts for each item.
Altmetric.com can be used through the Scopus database. Look for the Altmetric widget in Scopus on the right hand side of each individual search result.
This tool watches social media sites, newspapers, government policy documents and other sources for mentions of scholarly articles and brings all the attention together to compile article level metrics.
Tracking an author’s individual publication impact can be challenging. If you have a common name, multiple names or have changed your name during the course of your career, an ORCID ID helps that distinguish you from every other researcher and track publications across databases.
ORCID provides a persistent digital identifier that distinguishes you from every other researcher.
Include your ORCID identifier on your Webpage, when you submit publications, apply for grants, and in any research workflow to ensure you get credit for your work.
