New Leiden Ranking

[K S Chudamani]

>



dear all,

I would like to point out that the elaborate method used is simply an
extension of regular method. We have used h index and ranked universitires
in India.it has been published in pearl journal. This also gives similar
results. Then why break our head by complicatihg matters

chudamani


>
> Dear colleagues,
>
>
>
> Using the newly introduced indicator for impact in the Leiden Rankings
> 2011/2012 <http://www.leidenranking.com/ranking.aspx> —the Proportion
> top-10% publications (PPtop 10%)—one can test differences between
> institutions statistically using the z-test. Furthermore, one can test
> whether each university performs above or below expectation.
>
>
>
> An Excel sheet with the test embedded is made available at
> http://www.leydesdorff.net/leiden11/leiden11.xls and an example is
> elaborated in a short introduction at
> http://www.leydesdorff.net/leiden11/index.htm (coauthored with Lutz
> Bornmann).
>
>
>
> The test was previously used analogously for the Excellence Indicator in
> the SCImago Institutions Rankings
> <http://www.scimagoir.com/pdf/sir_2011_world_report.pdf> ; cf.
> http://www.leydesdorff.net/scimago11; Bornmann
> <http://arxiv.org/ftp/arxiv/papers/1110/1110.2305.pdf> et al., in press),
> and can be considered as additional to the stability intervals provided at
> the webpages of the Leiden Ranking
> <http://www.leidenranking.com/ranking.aspx> . The SCImago Rankings are
> based on Scopus data, and the Leiden Ranking on Web-of-Science data.
>
>
>
> With best wishes,
>
> Loet
>
>
>
>   _____
>
> Amsterdam School of Communications Research (ASCoR),
> Kloveniersburgwal 48, 1012 CX Amsterdam.
> Tel.: +31-20- 525 6598; fax: +31-842239111
>  <mailto:loet at leydesdorff.net> loet at leydesdorff.net ;
> <http://www.leydesdorff.net/> http://www.leydesdorff.net/ ;
> <http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en>
> http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en
>
>
>
> From: ASIS&T Special Interest Group on Metrics
> [mailto:SIGMETRICS at LISTSERV.UTK.EDU] On Behalf Of Paul Wouters
> Sent: Friday, December 09, 2011 11:58 AM
> To: SIGMETRICS at LISTSERV.UTK.EDU
> Subject: [SIGMETRICS] New Leiden Ranking
>
>
>
> Adminstrative info for SIGMETRICS (for example unsubscribe):
> http://web.utk.edu/~gwhitney/sigmetrics.html Dear colleagues
>
> US still dominates high impact publications in science
>
>
>
> The US are still the dominant scientific world power, but new centres of
> science are emerging. MIT is the university which has the highest citation
> impact of its publications in the world. Princeton and Harvard take
> positions two and three. These are some of the findings of the new Leiden
> Ranking 2011 – 2012 which has been published on the website:
> www.leidenranking.com <http://www.leidenranking.com/> . The top fifty list
> consists of 42 US based universities, 2 Swiss (Lausanne at 12 and ETH
> Zurich at 18), 1 Israeli (Weizmann Institute of Science), 4 British
> (Cambridge at 31, London School of Hygiene & Tropical Medicine at 33,
> Oxford at 36 and Durham at 42), and one Danish university (Technical
> University of Denmark). Aggregated to country level, the US has 64
> universities in the top 100 list, the UK 12, and the Netherlands 7. The
> latter is remarkable given its small size.
>
>
>
> The Leiden Ranking 2011-2012 is based on an advanced methodology which
> compensates for distorting effects due to the size of the university, the
> differences in citation characteristics between scientific fields,
> differences between English and non-English publications, and distorting
> effects of extremely high cited publications. Publications authored by
> researchers at different universities are attributed to the universities
> as fractions. This prevents distortion of the ranking by counting these
> publications multiple times (for each co-authoring university). This
> distorting effect is often overseen in other global university rankings,
> which leads to a relative advantage of clinical research and some physics
> fields in these rankings. This makes clear how sensitive global rankings
> are to the nitty-gritty of the calculations.
>
>
>
> The Leiden Ranking enables users to choose the criteria on which they wish
> to compare university performance. The menu offers 3 indicators of impact
> and 4 indicators of scientific collaboration. When scored on the
> percentage of their papers produced in collaboration with institutes in
> different countries, the London School of Hygiene & Tropical Medicine tops
> the list with more than 50 % of its publications co-authored with other
> countries.
>
>
>
> Although in terms of impact, US universities are still strongest, it is
> clear that other countries are emerging as centres of science by looking
> at the total production (number of publications in the Web of Science). In
> this ranking, Harvard University is number one. But in the top 25 we also
> see universities from Canada (Toronto at 2, British Columbia at 22), Japan
> (Tokyo at 4, Kyoto at 11, Osaka at 25), Brazil (Sao Paulo at 8), United
> Kingdom (Cambridge at 13, Oxford at 14, University College at 17), South
> Korea (Seoul at 19), and China (Zhejiang at 20).
>
>
>
> The Leiden Ranking is the first global university ranking which has
> published the details of its methodology and indicators. The indicators
> are presented in combination with stability intervals, an advanced
> statistical method to measure to what extent the differences in rankings
> between universities are significant.
>
>
>
> If one wishes to compare the university citation impact in a global
> context, it is best to take the percentage of papers in the top 10 %
> highly cited papers together with the calculation method “fractional
> counting”. This is the method which compares across institutions and
> fields in the fairest way.
>
>
>
> The Leiden Ranking is based on data of the Web of Science. Data on the
> arts and humanities are not included since these fields are not well
> represented in the Web of Science. The Leiden Ranking exclusively measures
> the citation impact of research of the 500 largest universities in the
> world. This prevents an arbritrary combination of performance in
> education, valorization and research, a disadvantage of many global
> university rankings.
>
>
>
> More information about the ranking results and its methodology:
> www.leidenranking.com <http://www.leidenranking.com/> .
>
>
>
> With regards
>
> Paul Wouters
> Professor of Scientometrics
> Director Centre for Science and Technology Studies
> Leiden University
>
> Visiting address:
> Willem Einthoven Building
> Wassenaarseweg 62A
> 2333 AL Leiden
> Mail address: P.O. Box 905
> 2300 AX Leiden
> T: +31 71 5273909 (secr.)
> F: +31 71 5273911
> E: p.f.wouters at cwts.leidenuniv.nl
>
> CWTS home page: www.cwts.nl
> Blog about Citation Cultures: http://citationculture.wordpress.com/
> <http://citationculture.wordpress.com/>
> Research Dreams: www.researchdreams.nl
>
>
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