A university's position in the ranking is determined by aggregating the D-indexes (Discipline H-index) of all affiliated scholars whose principal publication domain is Engineering and Technology. The D-index is a refined metric that only accounts for publications and citations explicitly related to the evaluated discipline, providing an accurate reflection of scholarly influence within the field.
Scope of Research and Inclusion Criteria
To ensure exceptional coverage and accuracy, profiles of 279,971 scientists identified from a broad array of bibliometric databases were screened. Of these, 50,429 scientists specializing specifically in Engineering and Technology were analyzed for ranking consideration.
Eligibility criteria for inclusion required:
- A minimum D-index threshold of 30 for each scientist in Engineering and Technology.
- The majority of a candidate’s highly-ranked publications concentrated in Engineering and Technology.
- Consideration of a scientist’s awards and achievements within the field.
- An adaptive D-index threshold (in increments of 10) proportional to the total number of scholars per discipline, always ensuring the top 1% of leading scholars are represented.
- A requirement that the difference between a scientist’s general H-index and D-index does not exceed 30%, reinforcing disciplinary focus and expertise.
In tandem with quantitative metrics, each scholar’s recognition through field-specific awards and achievements was considered, offering a secondary qualitative assessment.
Verification and Validation Procedures
Recognizing the inherent limitations of raw bibliometric data as sole evaluative measures, a rigorous manual verification process was employed. All scientist profiles underwent cross-checking against publication records from a diverse range of authoritative sources, safeguarding accuracy and completeness.
While the number of articles published in top journals and conferences is not a direct factor influencing rank, it is recommended as a supplementary indicator of a scientist's influence and contribution within Engineering and Technology.
Ranking positions are established based on each researcher’s H-index calculated strictly within the discipline, as informed by leading bibliometric databases—OpenAlex and CrossRef—which are recognized globally as benchmarks for research metrics in the academic community.
More extensive details about the methodology can be reviewed at our methodology page.
Research.com’s Agenda and Mission
The creation and ongoing refinement of this ranking are driven by Research.com’s commitment to inspiring scientists, business leaders, and policymakers globally. Our mission is to empower these stakeholders with actionable insight into where top experts are shaping the future, and to provide the research community at large with the tools necessary to identify leading scholars by discipline, country, and institution. Through transparent, data-driven rankings, we strive to facilitate collaboration, benchmarking, and recognition across the global scientific landscape.
Key Results of the 4th Edition Ranking
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Top 3 Institutions in Thailand by Number of Leading Scientists:
- Asian Institute of Technology: 4 scientists
- King Mongkut's University of Technology Thonburi: 3 scientists
- Chulalongkorn University: 3 scientists
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Global Prominence of Engineering and Technology Scholars:
Leading figures in the field are affiliated with globally recognized institutions 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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Top Individual Scientists Worldwide:
- 1st: Professor Frederick E. Shelton (Johnson & Johnson, United States) – D-index 257
- 2nd: Menachem Elimelech (Rice University) – D-index 200
- 3rd: Bruce E. Logan (Pennsylvania State University) – D-index 163
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Summary Statistics:
- Average total D-index for the top 5% of universities: 2073
- Average total D-index for all ranked institutions (n=1290): 305
- Average number of published articles by scientists at top 5% institutions: 10,087
- Average number of published articles at all institutions: 1,480
- Average number of citations for researchers at top 1% universities: 1,279,971
- Average number of citations for all ranked universities: 71,259
Research.com remains committed to maintaining the highest standards of objectivity, reliability, and transparency in the scientific evaluation process, ensuring that our rankings serve as a credible resource for the global research community.
