Data Sources and Citation Metrics
The 5th edition of the Research.com Best Engineering and Technology Scientists in Iraq Ranking is grounded primarily on comprehensive bibliometric data aggregated from OpenAlex and CrossRef, augmented by multiple other reputable data sources. The bibliometric information used to calculate the citation-based metrics were collected on January 12, 2026. A scientist's position in the ranking is determined by their D-index (Discipline H-index), which exclusively considers publications and citation metrics relevant to the examined discipline, ensuring a precise evaluation of the researcher’s impact within their specific field.
Scope of Research and Qualification Criteria
The ranking process examined a total of 279,971 scientist profiles garnered from a diverse array of bibliometric databases across all disciplines. Specifically, 6,000 scientists specializing in Engineering and Technology were analyzed to identify the leading experts in the field. To qualify for inclusion in the ranking, a scientist’s D-index must be at least 30, and the majority of their tier publications must pertain directly to Engineering and Technology.
In addition to bibliometric performance, scientists’ awards and notable achievements in Engineering and Technology were also factored in as qualitative measures of excellence. The D-index threshold is dynamically adjusted in increments of 10 based on the total estimated number of scholars in each discipline to guarantee meaningful representation. This adaptive threshold is designed to include the top 1% of leading researchers while maintaining a stringent quality standard. Furthermore, a proximity criterion ensures that the disparity between a scientist’s overall H-index and their D-index remains within 30% or less, thereby affirming a strong disciplinary focus.
Verification Practices and Methodological Rigor
Recognizing that raw bibliometric data alone cannot serve as an absolute measure of a scholar’s output, the Research.com team undertakes meticulous manual verification of all scientist profiles included in the ranking. This verification includes cross-correlation against publications indexed in a broad spectrum of trustworthy sources to uphold accuracy and credibility.
Although the number of papers published in prominent journals and conference proceedings does not directly influence a researcher’s ranking position, it represents a valuable secondary signal of scholarly contribution within a specific scientific area.
The ranking positions are ultimately established based on each researcher’s D-index, derived from the most authoritative bibliometric platforms available—OpenAlex and CrossRef. These databases are widely recognized in the research community for their comprehensiveness and accuracy.
We encourage readers to learn more about the detailed methodology that underpins this ranking by visiting our methodology page.
Research.com’s Agenda and Mission
Research.com’s mission in creating this ranking is to motivate researchers, corporations, and policymakers worldwide to closely monitor the trajectories of leading experts. By offering a transparent and rigorous evaluation framework, the ranking equips the entire scientific community with vital insights into who the foremost authorities are in specific disciplines, whether internationally, within individual countries, or across research institutions.
Through this initiative, we aim to foster greater recognition, collaboration, and innovation by connecting stakeholders with the highest-caliber talent in Engineering and Technology, thereby supporting the advancement of research excellence globally.
