Tracking the emergence of synthetic biology
Synthetic biology is an emerging domain that combines biological and engineering
concepts and which has seen rapid growth in research, innovation, and policy interest in …
concepts and which has seen rapid growth in research, innovation, and policy interest in …
The skewness of scientific productivity
This paper exploits a unique 2003–2011 large dataset, indexed by Thomson Reuters,
consisting of 17.2 million disambiguated authors classified into 30 broad scientific fields, as …
consisting of 17.2 million disambiguated authors classified into 30 broad scientific fields, as …
Probability and expected frequency of breakthroughs: Basis and use of a robust method of research assessment
In research policy, effective measures that lead to improvements in the generation of
knowledge must be based on reliable methods of research assessment, but for many …
knowledge must be based on reliable methods of research assessment, but for many …
The precision of the arithmetic mean, geometric mean and percentiles for citation data: An experimental simulation modelling approach
M Thelwall - Journal of informetrics, 2016 - Elsevier
When comparing the citation impact of nations, departments or other groups of researchers
within individual fields, three approaches have been proposed: arithmetic means, geometric …
within individual fields, three approaches have been proposed: arithmetic means, geometric …
Analysis of the journal impact factor and related bibliometric indicators in education and educational research category
This study analyzes the journal impact factor and related bibliometric indicators in Education
and Educational Research (E&ER) category, highlighting the main differences among …
and Educational Research (E&ER) category, highlighting the main differences among …
More precise methods for national research citation impact comparisons
R Fairclough, M Thelwall - Journal of Informetrics, 2015 - Elsevier
Governments sometimes need to analyse sets of research papers within a field in order to
monitor progress, assess the effect of recent policy changes, or identify areas of excellence …
monitor progress, assess the effect of recent policy changes, or identify areas of excellence …
Universality of citation distributions for academic institutions and journals
Citations measure the importance of a publication, and may serve as a proxy for its
popularity and quality of its contents. Here we study the distributions of citations to …
popularity and quality of its contents. Here we study the distributions of citations to …
Are the discretised lognormal and hooked power law distributions plausible for citation data?
M Thelwall - Journal of Informetrics, 2016 - Elsevier
There is no agreement over which statistical distribution is most appropriate for modelling
citation count data. This is important because if one distribution is accepted then the relative …
citation count data. This is important because if one distribution is accepted then the relative …
Structure of the scientific research and science policy
P Vinkler - Scientometrics, 2018 - Springer
Several scientometric indicators of 29 countries were analysed according to main scientific
fields (Life, Natural, Applied, and Agricultural Sciences). The difference of the individual …
fields (Life, Natural, Applied, and Agricultural Sciences). The difference of the individual …
Research assessment by percentile-based double rank analysis
In the double rank analysis of research publications, the local rank position of a country or
institution publication is expressed as a function of the world rank position. Excluding some …
institution publication is expressed as a function of the world rank position. Excluding some …