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Abstract
A scheme of evaluating an impact of a given scientific paper based on importance of papers quoting it is investigated. Introducing a weight of a given citation, dependent on the previous scientific achievements of the author of the citing paper, we define the weighting factor of a given scientist. Technically the weighting factors are defined by the components of the normalized leading eigenvector of the matrix describing the citation graph. The weighting factor of a given scientist, reflecting the scientific output of other researchers quoting his work, allows us to define weighted number of citation of a given paper, weighted impact factor of a journal and weighted Hirsch index of an individual scientist or of an entire scientific institution.
Abstract
The qualitative label ‘international journal’ is used widely, including in national research quality assessments. We determined the practicability of analysing internationality quantitatively using 39 conservation biology journals, providing a single numeric index (IIJ) based on 10 variables covering the countries represented in the journals’ editorial boards, authors and authors citing the journals’ papers. A numerical taxonomic analysis refined the interpretation, revealing six categories of journals reflecting distinct international emphases not apparent from simple inspection of the IIJs alone. Categories correlated significantly with journals’ citation impact (measured by the Hirsch index), with their rankings under the Australian Commonwealth’s ‘Excellence in Research for Australia’ and with some countries of publication, but not with listing by ISI Web of Science. The assessments do not reflect on quality, but may aid editors planning distinctive journal profiles, or authors seeking appropriate outlets.
Abstract
This paper presents the results of an evaluation of the national research system in Morocco. The exercise focuses on the period 1997–2006 and includes a comparison with South Africa, Egypt, Nigeria, Tunisia, Algeria, Portugal and Greece. Ratings of highly ranked researchers are developed on the basis of their number of publications, number of citations and also their ‘h-index’ (or Hirsch index). Finally, we examine the empirical model set by Glänzel that related the h-index to the number of publications and the mean citation rate per paper for these ‘upper-class’ researchers. The use of this model confirms that the h-index is likely to reflect the importance and the quality of the scientific output of a given researcher.
improving the Hirsch index when taking into account highly-cited papers (Egghe 2010a , 2010b ; Randić 2009 ). Among other weaknesses of index h one may mention the facts that it does not discriminate between single authorship and co
for Information Science and Technology 59 6 956 – 969 10.1002/asi.v59:6 10.1002/asi.20802 . Banks , MG 2006 An extension of the Hirsch index: Indexing scientific topics and
, QL 2007 Hirsch index or Hirsch rate? Some thoughts arising from Liang's data . Scientometrics 73 1 19 – 28 10.1007/s11192-006-1774-5 . Cabrerizo , FJ , Alonso , S
indirect impact, i.e. the citations to papers that cite this single publication. The main topic of this paper is the following. Consider a set of papers (e.g. of a researcher, journal or topic) of which we can calculate the classical Hirsch-index
It is well known (Hirsch 2005 ; Anderson et al. 2008 ; Kosmulski 2009 ; Abt 2011 ) that the Hirsch index h of an author increases with his/her publication duration t . Therefore, the h index cannot be used to compare the scientific
. The largest completed ( filled in ) square of points in the upper left hand corner of a Ferrers diagram is called the Durfee square and it corresponds to h PY (extension of the Hirsch-index) (Egghe 2010a
citation analysis to describe the spread of scientific ideas more intuitively. In this exploratory study we examined the spread of research on the Hirsch's index, i.e., h-index (Hirsch 2005 ). The h-index is a new measure to qualify a scholar
