A scientist's position in the ranking is determined by their D-index (Discipline H-index), a refined metric that focuses exclusively on a researcher’s output and citation impact within a specific discipline—in this case, Engineering and Technology. Unlike a general H-index, the D-index ensures that only papers and citations directly relevant to the examined discipline contribute to the ranking.
Scope of Research and Qualification Criteria
The ranking's scope encompasses a detailed examination of 279,971 scientist profiles identified from a broad array of bibliometric data sources across all academic disciplines. Within the field of Engineering and Technology specifically, 103 scientists were rigorously evaluated.
To qualify for inclusion in the ranking, a scientist’s D-index needed to be at least 30, with the majority of their tier publications concentrated within the Engineering and Technology domain. Additionally, researchers’ awards and notable achievements in this field were considered to further substantiate their scientific contributions.
The threshold for the D-index is carefully calibrated as increments of 10 based on the estimated total number of scholars in each discipline, ensuring that approximately the top 1% of leading scholars are captured in the ranking. Moreover, to maintain disciplinary consistency, a proximity threshold of 30% or less between a scientist’s overall H-index and their D-index is required, confirming that their primary impact lies within the discipline.
Verification Practices
The research team behind this ranking acknowledges that raw bibliometric data alone cannot definitively evaluate scholarly output. Consequently, each scientist’s profile underwent meticulous manual verification and cross-correlation against publications indexed in a wide range of trusted sources to validate the data’s accuracy and relevance.
While the number of papers published in prominent journals and conference proceedings is not a direct factor influencing the ranking position, it serves as a valuable secondary indicator of a scientist’s research contribution within their field.
The ranking positions are ultimately established using each researcher's D-index, derived from the comprehensive and authoritative bibliometric information curated by OpenAlex and CrossRef — two of the most prominent and respected databases accessible to the global research community.
For a detailed overview of the full methodology employed in constructing this ranking, we encourage readers to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission is to motivate researchers, companies, and policymakers around the world to explore the directions in which leading experts are advancing their fields. We provide an accessible platform to identify and familiarize the broader scientific community with the foremost experts in specific areas of study — whether by country, discipline, or research institution.
Through these rankings, we aim to foster greater collaboration, transparency, and recognition within academic and professional circles, facilitating informed decisions that support innovation and excellence in research worldwide.
