Data Sources and Citation Metrics
The 5th edition of the Research.com Best Engineering and Technology Scientists in Tunisia Ranking is constructed primarily using bibliometric data extracted from two of the most authoritative databases in scholarly research: OpenAlex and CrossRef. These platforms, supplemented by multiple additional reputable data sources, provide comprehensive coverage of publication and citation records. The bibliometric data utilized to calculate the citation-based metrics were collected on January 12, 2026, ensuring a recent and robust foundation for the evaluation.
A scientist’s position within the ranking is determined by their D-index (Discipline H-index). Unlike a general H-index, the D-index is calculated using publications and citation metrics that are strictly within the examined discipline, in this case, Engineering and Technology. This discipline-specific approach provides a more precise and relevant assessment of research impact within the targeted field.
Scope of Research and Ranking Eligibility
The ranking process began with the examination of 279,971 scientist profiles identified through a diverse array of bibliometric data covering all academic disciplines. Specifically, for the Engineering and Technology domain, 3,049 scientists were rigorously evaluated. To qualify for inclusion in the ranking, a scientist’s D-index had to meet a minimum threshold of 30. Furthermore, a majority of their tier publications had to be concentrated in Engineering and Technology.
In addition to bibliometric performance, awards and achievements within the field were considered as supplementary indicators of a scientist’s standing. The D-index threshold is tuned to increments of 10, reflecting the estimated total number of scholars within each discipline, to ensure that the top 1% of leading researchers are represented. Moreover, to maintain alignment between general and discipline-specific impact, the discrepancy between a scientist’s overall H-index and their D-index must not exceed 30%.
Verification and Validation Practices
We recognize that raw bibliometric data alone are insufficient to fully capture the quality and novelty of scientific contributions. Consequently, all scientist profiles included in the ranking underwent manual verification and were cross-correlated against publications verified in a wide range of trusted academic sources. Although the total number of papers published in prominent journals and conference proceedings does not directly influence a researcher’s ranking position, it remains a valuable secondary signal reflecting the depth and influence of their contributions.
The final ranking positions are established using each researcher’s D-index based on data aggregated primarily from OpenAlex and CrossRef—two of the most prominent and reliable bibliometric databases available to the global research community. For further details on the methods employed in constructing this ranking, please visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission in creating this ranking is to motivate researchers, academic institutions, companies, and policymakers worldwide to gain insight into where leading experts in Engineering and Technology are advancing their frontiers. We seek to provide the scientific community with transparent, carefully curated tools to identify and connect with the foremost experts in specific areas of study, across different countries, and within research institutions.
Through meticulous data collection, discipline-specific evaluation, and rigorous verification, we strive to uphold the highest standards of credibility and accuracy, thus empowering stakeholders to make informed decisions that foster scientific excellence and innovation.
