The bibliometric data utilized to devise the citation-based metrics, specifically curated for this ranking, were collected on January 12, 2026. Each scientist’s position within the ranking is determined by their D-index (Discipline H-index), a refined metric that specifically includes only papers and citations pertinent to the Materials Science discipline under examination. This discipline-focused approach allows for a precise evaluation of researchers' contributions within their specialized field.
Scope of Research and Inclusion Criteria
The ranking process encompassed a thorough examination of 279,971 scientist profiles identified from a variety of bibliometric data sources spanning all scientific disciplines. From this broad dataset, 15 scientists specializing in Materials Science in Egypt were specifically evaluated.
To qualify for inclusion in this ranking, a scientist was required to have a D-index of at least 40. Furthermore, a majority of their tier publications had to be explicitly within the Materials Science domain. In addition to citation-based metrics, scientists’ awards and recognized achievements in the field were also carefully considered to ensure a well-rounded assessment.
The D-index threshold for top researchers is set dynamically as increments of 10, relative to the estimated total number of scholars in each discipline. This approach guarantees that the top 1% of leading scholars are consistently incorporated into the list. Additionally, the proximity between a scientist’s general H-index and their D-index is maintained at 30% or less, ensuring that their disciplinary impact aligns closely with their overall research influence.
Verification and Methodology
Recognizing the intrinsic limitations of raw bibliometric data as an absolute evaluation tool, the research team has implemented meticulous manual verification procedures. Each scientist profile included in the ranking was cross-correlated against publications in a wide array of trustworthy sources to validate data accuracy and authenticity.
While the number of papers published in prominent journals and conference proceedings does not directly influence a researcher’s position in this ranking, it serves as an important secondary indicator of a scholar’s research contributions within a specific field.
The primary ranking metric remains the D-index, grounded in data sourced from OpenAlex and CrossRef. These platforms offer the most reliable and exhaustive bibliometric coverage for accurately portraying scientific impact in a discipline-focused manner.
For a comprehensive understanding of the methodologies and criteria applied in crafting this ranking, please consult our methodology page.
The Research.com Mission
Research.com is dedicated to fostering transparency and recognition within the global research community. Our mission behind creating rankings such as this is to motivate researchers, companies, and policymakers worldwide to monitor and understand emerging trends among leading experts. We aim to provide a definitive and accessible resource that enables the scientific community, academic institutions, and research stakeholders to identify, connect with, and celebrate top experts by specific domains, countries, and institutions.
Through rigorous data curation and verification, we strive to build credible and authoritative rankings that can support informed decisions and inspire continued excellence in scientific inquiry.
