A key metric used to establish a scientist's position in the ranking is the D-index (Discipline H-index). Unlike a general H-index, the D-index specifically accounts for a researcher’s papers and citations within the examined discipline of Environmental Sciences. This discipline-specific focus allows for a more precise and rigorous assessment of a researcher’s impact and contribution within their field.
Scope of Research and Inclusion Criteria
The ranking framework examined a total of 279,971 scientist profiles identified from a broad array of bibliometric data sources across all scientific disciplines. Within this expansive dataset, 4 scientists were specifically identified and analyzed in the Environmental Sciences discipline for the Vietnam ranking.
To qualify for inclusion, a scientist’s D-index had to meet a minimum threshold of 30, ensuring only highly impactful researchers are considered. Additionally, a majority of the scientist’s tier publications had to be in the area of Environmental Sciences to confirm their primary focus in the discipline. Awards and notable achievements in Environmental Sciences were also factored into the evaluation process.
The D-index threshold is dynamically set in 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 incorporated into the ranking. Furthermore, to maintain consistency in specialization, a scientist’s D-index must not deviate by more than 30% from their general H-index, underscoring the close alignment between their overall impact and specific disciplinary contribution.
Verification and Validation Practices
Recognizing that raw bibliometric data alone cannot fully capture the scholarly value or output, the Research.com team performed extensive manual verification of all scientist profiles included in the ranking. This process involved cross-correlating publication records against a wide range of trustworthy sources to confirm accuracy and authenticity.
While the number of papers published in prominent journals and conference proceedings does not directly influence a researcher’s position within the ranking, these metrics serve as important secondary indicators of a scientist’s contributions to Environmental Sciences research.
The ranking positions are ultimately determined by the rigorously validated D-index calculated based on data from OpenAlex and CrossRef, the most prominent and reliable bibliometric databases accessible to the research community to date.
For a detailed overview of the data collection, processing, and evaluation methodology, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision
Research.com is committed to motivating researchers, academic institutions, companies, and policymakers globally to gain a clearer understanding of leading scientific expertise and its trajectory. Our rankings provide an essential platform for the scientific community to identify who the foremost experts are within specific areas of research, across various countries and institutions.
Through meticulous, data-driven, and transparent methodologies, Research.com aims to foster collaboration, inform strategic decisions, and highlight excellence across disciplines, thereby advancing the science ecosystem worldwide.
