Institutions' positions in the ranking are determined by calculating the aggregate D-indexes (Discipline H-indexes) of all ranking scholars affiliated with each university whose primary publication area lies in Engineering and Technology. The D-index considers exclusively the publications and citation data specific to the examined discipline, ensuring precision and discipline-relevance in the evaluation process.
Scope of Research and Ranking Methodology
The ranking framework is built on the analysis of 279,971 scientist profiles sourced from multiple bibliometric databases. Out of these, 50,429 scientists specializing in Engineering and Technology were further scrutinized.
To qualify for inclusion, a minimum D-index threshold of 30 was established, with the majority of an individual’s publications required to be in the area of Engineering and Technology. Furthermore, distinguished awards and achievements in the field were factored into the assessment, reflecting a broader view of academic impact. For the identification of top researchers, the D-index threshold is set as an increment of 10, depending on the total number of scholars in each discipline, thereby guaranteeing that the top 1% of leading scholars are incorporated into the ranking. It is also stipulated that the proximity between a scientist’s general H-index and their D-index should not exceed 30%. Awards and accolades in the relevant field contribute further to the comprehensive assessment of each scholar.
Verification Practices and Data Integrity
At Research.com, we recognize the limitations of relying solely on raw bibliometric indicators for scholarly assessment. As such, each scientist profile underwent manual verification and was systematically cross-referenced with publications indexed by a diverse array of established and trustworthy sources.
While not a direct factor in determining a scientist's rank, the number of publications in leading journals and conference proceedings serves as a valuable secondary signal of research contribution in a given field. The official ranking position is anchored in each researcher's H-index, derived from information in OpenAlex and CrossRef—arguably the most comprehensive and well-established bibliometric databases currently available.
For an in-depth explanation of the methodologies and evaluation criteria, please refer to our methodology page.
Research.com Mission and Objectives
Research.com’s ranking initiative is underpinned by a clear mission: to inspire scientists, business leaders, and policymakers worldwide to identify where top experts are making headway, and to provide the global academic community with a transparent reference for recognizing the foremost authorities in specific disciplines, both internationally and within individual research institutions.
Key Results of the 4th Edition Ranking
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Top 3 South African Institutions with the Highest Number of Leading Scientists in Engineering and Technology:
- University of KwaZulu-Natal (3 scientists)
- Stellenbosch University (3 scientists)
- University of Cape Town (3 scientists)
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Global Representation: The most prominent scholars in Engineering and Technology are affiliated with a diverse array of institutions worldwide, including Rice University, Pennsylvania State University, University College Dublin, HEC Montréal, Quaid-i-Azam University, Northwestern University, Stanford University, Carnegie Mellon University, Penn State Harrisburg, and The University of Texas at Arlington.
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Leading Individuals:
- Professor Frederick E. Shelton (Johnson & Johnson, United States) leads the global ranking with a D-index of 257.
- Menachem Elimelech (Rice University) ranks second globally with a D-index of 200.
- Bruce E. Logan (Pennsylvania State University) secures the third spot with a D-index of 163.
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Institutional Performance Metrics:
- The average total D-index for the top 5% of universities is 2,073, compared to an average of 305 across all 1,290 institutions included in the ranking.
- The average number of published articles in Engineering and Technology for scientists at the top 5% of universities stands at 10,087, in contrast to the 1,480 average for all universities surveyed.
- The average number of citations for researchers affiliated with the top 1% of universities reaches an impressive 1,279,971, versus an average of 71,259 for all included universities.
The 4th edition of the Research.com Best Engineering and Technology Universities in South Africa Ranking is crafted with the utmost rigor, ensuring credibility and providing an invaluable benchmarking tool for the academic and scientific community worldwide.
