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, called paper's discipline impact factor (PDIF), which is defined as the ratio between citation/download rate to average cited/downloaded rate per paper in the discipline the paper belongs to. Paper i 's PDIF can be calculated by where CIT i is the
exemplify and validate the model. “ Model application to h-Index, impact factor for Scientometrics and RNAi, Nano* for PNAS ” section applies the mixed model approach to four research areas and the interdisciplinarity indicator to the two datasets from
; Franceschet 2010 ; Jacsó 2010 ), and despite some criticism (Archambault and Larivière 2009 ), impact factor (IF) is a traditionally most often used surrogate for assessing the scientific quality of journals. The IF is published by Thomson Reuters (TR
Abstract
In the present work an attempt is made to select journal bases for some subfields in chemistry. Through the modification of the Hirst's discioline impact factor concept, theprimary information base for the selected subfields is detenained. Relating impact factors of citing and cited journals,citation strategy indicators are suggested. Determination of the mean impact factors for subfields enables the introduction ofsubfields factors that bring the impact factors of journals of various subfields on a comparavle level.
.: Regarding a case report: Rare diseases and bibliometric impact factor. J. Clin. Epidemiol., 2012, 65 (8), 916–917. 11 Nieder, C., Pawinski, A., Dalhaug, A
Abstract
Describes a new method of evaluation of scientific output by laboratories engaged in diverse fields of research. This method helps to evaluate those outputs which are quite recent and not amenable to citation analysis. For the purpose of analysis, impact factor of journals in which papers are published are considered. A method for normalisation of impact factor of journals has been described and, normalised impact factors have also been used for the purpose of analysis. It is found that in such analysis normalised impact factor tends to show better results compared to simple impact factor. The analysis helps us to generate numerous performance indicators such as average impact factor and normalised impact factor for each laboratory and the research complex such as CSIR as a whole; average impact factor and normalised impact factor for each scientist of a laboratory and the research complex; spectral distribution of papers falling within various ranges of impact factors and normalised impact factors. By comparing the performances over several years the trend of research activity of each laboratory can also be obtained.
Regarding research quality, the number of citations and the impact factor have been regarded as indices of the quality (or intellectual contribution) of a scholar's publication (Chang 2008 ; Hayati and Ebrahimy 2009 ). This study also regards research
bibliometric indicators. Is this the end of the impact factor era? [Tudománymetriai újdonságok. Vége az impakt faktor egyeduralmának?] Magy Onkol. 2009; 53: 115–125. [Hungarian
platforms among Hungarian researchers, are peer-reviewed without exception. Many of them have an impact factor; what is more, there are cases when a journal has become a worldwide leader in the given area of science. List of available journals Our
Abstract
This paper studies the main characteristics of the citation indexes currently developed in Spain. The paper compares the impact factors offered by Spanish citation indexes with the impact factor of Spanish journals also collected by the JCRs of the ISI (SCI and SSCI) over a five-year period (2001–2005). Spanish journals published in English have higher impact factor scores in the JCR databases of the ISI than in Spanish citation indexes.
