Total 2,403,032 scientists, country 221, and institutions 24,466 are evaluated in the Productivity Rankings, an exclusive service provided by AD Scientific Index. This ranking measures and highlights the scientific productivity of researchers based on the i10 index (number of publications with at least 10 citations). This system identifies highly productive scientists across disciplines, institutions, and regions, contributing to the development of evidence-based academic policies and effective incentive mechanisms. The rankings include global, regional, and institutional analyses, along with specialized rankings such as Scientists' Last 6 Years' i10 Index and Universities' i10 Index Rankings 2025. With Premium Membership, you can:
- Gain full access to detailed comparisons and advanced analytics,
- Objectively evaluate your academic productivity,
- Make strategic, data-driven decisions to enhance performance.
* Total i10 IndexRankings
Ranking Based On Selection: 1
![Samuel E. Ogbeide](https://cdn.adscientificindex.com/pictures/9c/5795361.jpg)
Petroleum and natural gas processing
energy Conservation
Biomass processing
Renewable energy
modeling and simulation.
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
12
0.600
* Total i10 IndexRankings
Ranking Based On Selection: 2
![Azuokwu Augustine Azubike](https://cdn.adscientificindex.com/pictures/ca/5063923.jpg)
Petroleum Engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
* Total i10 IndexRankings
Ranking Based On Selection: 3
![Akpobi Elohor Diamond](https://cdn.adscientificindex.com/pictures/70/5062508.jpg)
reservoir engineering
well testing
petroleum engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
* Total i10 IndexRankings
Ranking Based On Selection: 4
![Randolph Deh Opute Mnse, Mspe, Coren](https://cdn.adscientificindex.com/pictures/82/5072519.jpg)
Oil and Gas Environmental Studies
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
* Total i10 IndexRankings
Ranking Based On Selection: 5
![Elohor Akpobi](/user/assets/images/profile/no-profile-photo.png)
reservoir engineering
well testing
petroleum engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
Samuel E. Ogbeide
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
12
0.600
Petroleum and natural gas processing
energy Conservation
Biomass processing
Renewable energy
modeling and simulation.
Azuokwu Augustine Azubike
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
Petroleum Engineering
Akpobi Elohor Diamond
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
reservoir engineering
well testing
petroleum engineering
Randolph Deh Opute Mnse, Mspe, Coren
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
Oil and Gas Environmental Studies
Elohor Akpobi
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
reservoir engineering
well testing
petroleum engineering