A scientist's position in the ranking is determined using the D-index (Discipline H-index). Unlike the traditional H-index, the D-index focuses exclusively on publications and citation metrics within the examined discipline—in this case, Engineering and Technology—thus providing a precise reflection of a researcher's impact and influence within their specialized field.
Scope of Research and Qualification Criteria
The ranking process involved a rigorous examination of 279,971 scientist profiles identified across multiple bibliometric databases, spanning all disciplines. Specifically, for this edition, 24 scientists with expertise in Engineering and Technology based in South Africa were considered. To qualify for inclusion, a scientist's D-index had to meet or exceed a threshold of 30, ensuring that only top-performing researchers are highlighted.
Moreover, a majority of each qualifying scientist’s tier publications needed to be within the realm of Engineering and Technology, reinforcing the disciplinary focus of the ranking. Accomplishments such as significant awards and recognized achievements in Engineering and Technology were also taken into account as supplementary factors.
The D-index threshold for consideration is systematically calibrated as an increment of 10, depending on the estimated total number of scholars within each discipline. This approach guarantees that the top 1% of leading scholars are consistently incorporated into the list. Additionally, there is an imposed proximity criterion ensuring a difference of no more than 30% between a scientist’s general H-index and their D-index, supporting balanced and relevant disciplinary assessment.
Verification and Validation Practices
The team behind this ranking is acutely aware that raw bibliometric data alone cannot serve as an absolute measure of a scholar's scientific output or impact. Therefore, every scientist profile was subjected to meticulous manual verification. This process involved cross-correlation of publication records against a broad range of trustworthy sources, affirming the accuracy and authenticity of the data represented.
While the number of papers published in prominent journals and conference proceedings does not directly influence a researcher’s position in the Research.com ranking, it remains a valuable secondary indicator of their substantive contributions to Engineering and Technology research.
Ultimately, a scientist’s rank is firmly established by their D-index, calculated through the comprehensive bibliometric information gathered from OpenAlex and CrossRef. This methodological choice underscores our commitment to leveraging authoritative and up-to-date data.
We encourage interested readers to review further details about the methodology employed on our methodology page.
Research.com’s Mission and Agenda
At Research.com, our mission is to inspire researchers, companies, and policymakers worldwide to closely monitor emerging trends in scientific leadership. We aim to provide the scientific community, academic institutions, and stakeholders with a transparent, reliable way to identify who the leading experts are in specific areas of study, various countries, or individual research institutions.
This ranking is the culmination of careful, multidisciplinary efforts to deliver a credible and insightful tool that facilitates better recognition of scholarly excellence within Engineering and Technology in South Africa. By highlighting these leaders, we seek to foster collaboration, knowledge exchange, and informed decision-making across the global research ecosystem.
