Data Sources and Metrics
The 5th edition of the Research.com Best Earth Science Scientists in Yemen Ranking is primarily based on comprehensive bibliometric data collected from leading sources such as OpenAlex and CrossRef, supplemented by multiple other reputable databases. The citation-based metrics that underpin the ranking were gathered on January 12, 2026, ensuring a recent and robust dataset for analysis. A scientist's position in the ranking is determined by their D-index (Discipline H-index), a refined metric that exclusively includes publications and citations relevant to the specific discipline under evaluation, thereby offering a more precise measure of scholarly impact within Earth Science.
Scope of the Ranking
The ranking process began with the examination of 279,971 scientist profiles aggregated from a variety of bibliometric data sources covering all academic disciplines. From this extensive pool, 1 scientist specializing specifically in Earth Science in Yemen was identified and assessed. To qualify for inclusion in the ranking, a scientist must have a D-index of at least 30, with the majority of their tier publications originating within the Earth Science discipline. Additionally, awards and notable achievements related to Earth Science were factored into the evaluation. The threshold for the D-index varies in increments of 10, tailored to the estimated total number of scholars in each discipline, while ensuring that the list captures the top 1% of leading researchers. Furthermore, to maintain relevance and consistency, only those scientists whose general H-index and D-index differ by no more than 30% were considered.
Verification and Validation Practices
Recognizing that raw bibliometric data alone cannot fully encapsulate the scholarly contributions of researchers, the Research.com team employed rigorous manual verification and cross-correlation of scientist profiles against a wide array of trustworthy publications and sources. Although the number of papers published in prominent journals and conference proceedings does not directly influence a researcher’s ranking position, it serves as a valuable secondary indicator of their impact and contribution within the Earth Science community. The ranking itself is ultimately established by applying the D-index metric derived from data curated by OpenAlex and CrossRef—two of the most authoritative and widely recognized bibliometric databases accessible to the global research community. Interested readers and stakeholders are encouraged to learn more about the detailed methodology by visiting our methodology page.
Research.com’s Mission and Objectives
Research.com’s mission in producing this ranking is to inspire researchers, policymakers, corporations, and academic leaders around the world to understand the trajectories of leading experts. By providing a transparent and meticulously crafted framework to identify top researchers in specific fields such as Earth Science, whether locally in Yemen, nationally, or internationally, we aim to foster greater visibility and collaboration across the global scientific community. This initiative not only highlights individual excellence but also serves as a resource for institutions and stakeholders seeking to recognize and support exemplary scientific contributions.
