All bibliometric data used to devise the citation-based metrics, including those underpinning the ranking, were collected on January 12, 2026. A scientist’s placement within the ranking is determined by their D-index (Discipline H-index), a refined metric that specifically accounts for a researcher’s publications and citations confined to the examined discipline — in this case, Engineering and Technology.
Scope of Research and Ranking Criteria
The ranking process examined a total of 279,971 scientist profiles identified from a broad spectrum of bibliometric data sources, encompassing all research disciplines globally. Within this dataset, 40 scientists were identified whose core contributions pertain specifically to the field of Engineering and Technology.
To qualify for inclusion in this ranking, a researcher’s D-index had to meet a minimum threshold of 30, ensuring a high level of domain-specific impact. Furthermore, the majority of their tier publications had to fall within the Engineering and Technology area. Beyond metrics, scientists’ awards and recognized achievements within this field were also taken into account as complementary factors in the evaluation process.
The D-index threshold is carefully calibrated based on the estimated total number of scholars in each discipline. It increases in increments of 10 relative to the scale of each field, while rigorously ensuring that the top 1% of leading scholars are included in the list. Additionally, the methodology requires that the difference between a scientist’s overall H-index and their D-index does not exceed 30%, thereby confirming a strong alignment between general and discipline-specific research impact.
Additional Verification and Validation Practices
Recognizing the intrinsic limitations of relying solely on raw bibliometric data as an absolute measure of scholarly output, the Research.com team undertakes extensive manual verification procedures. Each scientist profile was carefully cross-verified against publications listed across a wide range of trustworthy and authoritative sources to ensure the accuracy and integrity of the underlying data.
While the number of papers published in prominent journals and conference proceedings does not directly influence a researcher’s position in the ranking, it serves as an important secondary indicator of their scientific contribution within their specific area of expertise.
Ultimately, each researcher’s rank is established using their D-index, calculated from reliable information gathered primarily from OpenAlex and CrossRef. This dual-source approach enhances the credibility and robustness of the ranking outcomes.
For an in-depth explanation of the methodology and data processing protocols, we encourage readers to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission is to inspire researchers, companies, and policymakers around the world to attentively observe where leading experts are directing their efforts. By providing a transparent and meticulously crafted ranking, we aim to facilitate the global scientific community’s recognition of who the foremost experts are in distinct areas of study, both across countries and within specific research institutions.
Through this initiative, we seek to empower stakeholders with actionable insights that foster collaboration, drive innovation, and inform strategic decisions, ultimately advancing the frontiers of Engineering and Technology research.
