Data Sources and Bibliometric Collection
The ranking for the 5th edition of Research.com’s Best Engineering and Technology Scientists in Qatar primarily draws upon comprehensive bibliometric data sourced from OpenAlex and CrossRef, supplemented by multiple other authoritative data repositories. These sources collectively provide extensive coverage of scholarly publications, citations, and related metadata. The bibliometric data used to derive citation-based metrics for this ranking were collected as of January 12, 2026, ensuring the incorporation of the most current research outputs available at that time.
A researcher’s position within the ranking is determined based on their D-index (Discipline H-index), a discipline-specific adaptation of the traditional H-index that only accounts for papers and citations pertinent to the examined field of Engineering and Technology. This refined metric allows for a more precise evaluation of an individual’s impact within their specialized area of study.
Scope of Research and Qualification Criteria
The assessment underpinning this ranking encompassed a total of 279,971 scientist profiles identified through a wide array of bibliometric data sources spanning all scientific disciplines. Specifically, 24 scientists were examined within the domain of Engineering and Technology.
To qualify for inclusion in the ranking, a scientist’s D-index needed to meet a minimum threshold of 30, with a majority of their tier publications belonging explicitly to the Engineering and Technology field. In addition to bibliometric thresholds, scientists’ awards and notable achievements within the discipline were also considered to add qualitative depth to the evaluation.
The D-index threshold is dynamically set in increments of 10 relative to the estimated total number of scholars in each discipline, ensuring the inclusion of the top 1% of leading scholars within the list. Moreover, the methodology requires a proximity of 30% or less between a scientist’s general H-index and their D-index, thereby verifying the discipline-specific strength of their research contributions.
Additional Verification Practices
Recognizing that raw bibliometric data alone cannot serve as an absolute measure of scholarly output, the ranking team undertook rigorous manual verifications of all scientist profiles. This process involved cross-correlating publication records against a broad spectrum of trustworthy sources to validate accuracy and authenticity.
Although the total number of papers published in prominent journals and conference proceedings does not directly influence an individual’s ranking position, it is regarded as a valuable secondary indicator of a scientist’s contribution to their research area.
The final ranking positions are established primarily through each researcher’s D-index, sourced from OpenAlex and CrossRef—widely acknowledged as the most prominent and reliable bibliometric databases accessible to the global research community.
For an in-depth understanding of the detailed methodology behind this ranking, we invite readers to visit our methodology page.
Research.com’s Mission Behind the Ranking
At Research.com, our mission is to motivate researchers, corporations, and policymakers worldwide to examine the trajectories of leading experts in various scientific domains. By providing transparent and meticulously curated rankings, we aim to offer the scientific community, institutions, and stakeholders a clear pathway to identify and recognize the foremost experts in specific areas of study, whether by country, discipline, or research institution.
This endeavor reflects our commitment to fostering global collaboration, informed decision-making, and sustained advancement in science and technology.
