A scientist’s position within the ranking is determined by their D-index (Discipline H-index), a refined bibliometric metric which evaluates a researcher’s output and citations exclusively within the examined discipline. This ensures that the ranking reflects scholarly impact specifically related to Engineering and Technology, rather than generalized research influence across multiple fields.
Scope of Research and Qualification Criteria
This edition examined 279,971 scientist profiles identified through a rigorous aggregation of bibliometric databases and various authoritative sources, covering all academic disciplines. Within the scope of Engineering and Technology specifically, 12,000 scientists were assessed against strict qualification criteria.
To qualify for inclusion in the ranking, scientists were required to have a D-index of at least 30, with a majority of their tier publications firmly situated in the field of Engineering and Technology. Additionally, consideration was given to scientists’ awards and notable achievements relevant to this domain. These criteria ensure the ranking reflects researchers with substantial contributions to the discipline.
The D-index threshold is dynamically set in increments of 10 depending on the estimated population of scholars within each discipline, guaranteeing representation of the top 1% of leading researchers. Furthermore, to maintain disciplinary relevance, only candidates whose D-index values approximate their overall H-index by 30% or less were considered, thereby ensuring alignment between general and field-specific research performance.
Additional Verification Practices
Recognizing that bibliometric raw data alone cannot serve as an absolute measure of scholarly output and impact, the Research.com team has engaged in meticulous manual verification of all scientist profiles included in this ranking. Each profile was cross-correlated against publications indexed in a broad range of trustworthy and validated academic sources.
While not directly influencing a researcher’s rank, the volume of papers published in prominent journals and conference proceedings has been considered a valuable secondary signal of a scientist’s substantive contribution to their area of expertise.
The ranking position is fundamentally established through each researcher’s D-index, which is calculated using comprehensive information gathered from OpenAlex and CrossRef—two of the most prominent and widely regarded bibliometric databases available to the global research community.
For a more detailed understanding of the methodology employed, please visit our methodology page.
Research.com’s Mission and Agenda
The creation of this ranking aligns with Research.com’s overarching mission to motivate researchers, companies, and policymakers worldwide to understand and engage with the trajectories of leading experts. By providing transparent, rigorously constructed rankings, we offer the scientific community an objective pathway to identify who the foremost specialists are in specific disciplines, within various countries, and across research institutions.
Through this initiative, Research.com aims to foster informed decisions in collaboration, funding, and policy development, ultimately advancing the global research ecosystem.
