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The ranking was based on that used citations from and assessed scientists for their total number of papers (1960–2019) and career-long citation (1996–2019) impact within their disciplines. The authors createdÌýÌýof the top 2% of scientists of their main subfield discipline that provides standardised information on citations, h-index, co-authorship adjusted hm-index, citations to papers in different authorship positions and a composite indicator.

Career-long impact

Professor David Alexander, with 107 Scopus-indexed publications, has been ranked 31^st out of 17,157 scientists in the field of Strategic, Defence andÌýSecurity Studies. It has placed him within the top 0.18% of scientists in his main subfield discipline.

Professor Ilan Kelman, with 184 Scopus-indexed publications, has been rankedÌý78^thÌýout of 17,157 scientists in the field of Strategic, Defence andÌýSecurity Studies. It has placed him within the top 0.45% of scientists in his main subfield discipline.

Year 2019 citation impact

Professor Ilan Kelman, with 184 Scopus-indexed publications, has been rankedÌý22^ndÌýout of 17,157 scientists in the field of Strategic, Defence andÌýSecurity Studies. It has placed him within the topÌý0.13%Ìýof scientists in his main subfield disciplineÌýin 2019.

Dr Bayes Ahmed, with 25 Scopus-indexed publications, has been ranked 526^th out of 44,176 scientists in the field of Geological andÌýGeomatics Engineering. It has placed him within the top 1.19% of scientists in his main subfield discipline in 2019.

This is an indication that Dr Bayes Ahmed is an emerging top scientist in the field of Geological andÌýGeomatics Engineering.

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Reference

• Ioannidis, J. P., Boyack, K. W., & Baas, J. (2020). Updated science-wide author databases of standardized citation indicators.ÌýPLoS Biology,Ìý18(10), e3000918.