Total 2,403,032 scientists, country 221, and institutions 24,468 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
![Ram S Katiyar|Ram Katiyar, RS Katiyar, R Katiyar](https://cdn.adscientificindex.com/pictures/49/798425.jpg)
Physics
Materials Science
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
538
254
0.472
* Total i10 IndexRankings
Ranking Based On Selection: 2
![Zhongfang Chen](https://cdn.adscientificindex.com/pictures/35/796135.jpg)
Computational Chemistry
Nanomaterials Science
Physical Chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
292
214
0.733
* Total i10 IndexRankings
Ranking Based On Selection: 3
![Mark R Jury](https://cdn.adscientificindex.com/pictures/e6/812691.jpg)
climate
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
173
65
0.376
* Total i10 IndexRankings
Ranking Based On Selection: 4
![Walter Frontera](https://cdn.adscientificindex.com/pictures/87/806530.jpg)
muscle biology
aging
exercise physiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
166
112
0.675
* Total i10 IndexRankings
Ranking Based On Selection: 5
![Jess K Zimmerman](https://cdn.adscientificindex.com/pictures/66/794985.jpg)
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
165
138
0.836
* Total i10 IndexRankings
Ranking Based On Selection: 6
![Carlos R Cabrera](https://cdn.adscientificindex.com/pictures/40/796133.jpg)
Electrochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
152
69
0.454
* Total i10 IndexRankings
Ranking Based On Selection: 7
![T Mitchell Aide](https://cdn.adscientificindex.com/pictures/1e/794662.jpg)
Ecology
conservation biology
global change
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
144
116
0.806
* Total i10 IndexRankings
Ranking Based On Selection: 8
![Joel E Gonzalez Nieves](https://cdn.adscientificindex.com/pictures/78/4312390.jpg)
Biology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
128
51
0.398
* Total i10 IndexRankings
Ranking Based On Selection: 9
![Kai Griebenow](https://cdn.adscientificindex.com/pictures/92/793747.jpg)
Pharmaceutical Biotechnology
Protein Biochemistry
Drug Delivery
Natural Products from Algae
Sustainability
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
127
47
0.370
* Total i10 IndexRankings
Ranking Based On Selection: 10
![Kejie Lu](https://cdn.adscientificindex.com/pictures/92/786753.jpg)
Computer and Communication Networks
Wireless communications
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
49
0.402
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
* Total i10 IndexRankings
Ranking Based On Selection: 11
![Gerardo Morell](https://cdn.adscientificindex.com/pictures/25/798118.jpg)
Biomedical Applications of Nanostructured Materials
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
43
0.352
* Total i10 IndexRankings
Ranking Based On Selection: 12
![Cynthia M Perez](https://cdn.adscientificindex.com/pictures/05/807363.jpg)
Epidemiology
Diabetes
Obesity
Cardiometabolic risk
Hepatitis C
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
115
71
0.617
* Total i10 IndexRankings
Ranking Based On Selection: 13
![James D Ackerman](https://cdn.adscientificindex.com/pictures/8c/807377.jpg)
Orchidology
Plant Reproductive Ecology
Invasive Species Biology
Tropical Biology
Caribbean Floristics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
110
62
0.564
* Total i10 IndexRankings
Ranking Based On Selection: 14
![Xiaoming Zou](https://cdn.adscientificindex.com/pictures/17/784008.jpg)
Earthworm Ecology
Disturbance Ecology
Forestry
Soil Science
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
109
75
0.688
* Total i10 IndexRankings
Ranking Based On Selection: 15
![Brad R Weiner](/user/assets/images/profile/no-profile-photo.png)
Physical Chemistry
Nanotechnology
Spectroscopy
Molecular Reaction Dynamics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
108
31
0.287
* Total i10 IndexRankings
Ranking Based On Selection: 16
![Gregory J Quirk](https://cdn.adscientificindex.com/pictures/63/793196.jpg)
Neuroscience
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
103
91
0.883
* Total i10 IndexRankings
Ranking Based On Selection: 17
![Nestor M Carballeira](https://cdn.adscientificindex.com/pictures/ee/796132.jpg)
organic and medicinal chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
103
23
0.223
* Total i10 IndexRankings
Ranking Based On Selection: 18
![Ernest H Williams Jr](/user/assets/images/profile/no-profile-photo.png)
aquatic animal health
parasitology
fish isopods
major marine environmental disturbances
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
102
27
0.265
* Total i10 IndexRankings
Ranking Based On Selection: 19
![John A Soderquist](/user/assets/images/profile/no-profile-photo.png)
Chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
94
8
0.085
* Total i10 IndexRankings
Ranking Based On Selection: 20
![Arun Kumar](https://cdn.adscientificindex.com/pictures/22/806805.jpg)
Electrochemistry
Nanoparticle for energy storage materials
Material Science
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
91
39
0.429
* Total i10 IndexRankings
Ranking Based On Selection: 21
![Jose E Garcia Arraras](/user/assets/images/profile/no-profile-photo.png)
regeneration biology
echinoderms
nervous system development
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
89
55
0.618
* Total i10 IndexRankings
Ranking Based On Selection: 22
![Lutful Bari Bhuiyan](/user/assets/images/profile/no-profile-photo.png)
liquids
colloids and polyelectrolytes
chemical physics
statistical mechanics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
87
18
0.207
* Total i10 IndexRankings
Ranking Based On Selection: 23
![Samuel P Hernandez Rivera](https://cdn.adscientificindex.com/pictures/74/806540.jpg)
Explosives Properties and Detection
Spectroscopy based Detection of Che-Bio Threats
Chemometrics Enhanced Spectroscopy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
81
26
0.321
* Total i10 IndexRankings
Ranking Based On Selection: 24
![Gary A Toranzos](/user/assets/images/profile/no-profile-photo.png)
Environmental Microbiology
Microbial Ecology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
70
30
0.429
* Total i10 IndexRankings
Ranking Based On Selection: 25
![Nicholas Brokaw](/user/assets/images/profile/no-profile-photo.png)
Tropical forest structure and diversity
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
69
45
0.652
Ram S Katiyar|Ram Katiyar, RS Katiyar, R Katiyar
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
538
254
0.472
Zhongfang Chen
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
292
214
0.733
Computational Chemistry
Nanomaterials Science
Physical Chemistry
Mark R Jury
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
173
65
0.376
Walter Frontera
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
166
112
0.675
Jess K Zimmerman
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
165
138
0.836
Carlos R Cabrera
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
152
69
0.454
T Mitchell Aide
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
144
116
0.806
Ecology
conservation biology
global change
Joel E Gonzalez Nieves
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
128
51
0.398
Kai Griebenow
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
127
47
0.370
Pharmaceutical Biotechnology
Protein Biochemistry
Drug Delivery
Natural Products from Algae
Sustainability
Kejie Lu
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
49
0.402
Computer and Communication Networks
Wireless communications
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
Gerardo Morell
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
43
0.352
Biomedical Applications of Nanostructured Materials
Cynthia M Perez
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
115
71
0.617
Epidemiology
Diabetes
Obesity
Cardiometabolic risk
Hepatitis C
James D Ackerman
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
110
62
0.564
Orchidology
Plant Reproductive Ecology
Invasive Species Biology
Tropical Biology
Caribbean Floristics
Xiaoming Zou
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
109
75
0.688
Earthworm Ecology
Disturbance Ecology
Forestry
Soil Science
Brad R Weiner
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
108
31
0.287
Physical Chemistry
Nanotechnology
Spectroscopy
Molecular Reaction Dynamics
Gregory J Quirk
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
103
91
0.883
Nestor M Carballeira
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
103
23
0.223
Ernest H Williams Jr
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
102
27
0.265
aquatic animal health
parasitology
fish isopods
major marine environmental disturbances
John A Soderquist
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
94
8
0.085
Arun Kumar
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
91
39
0.429
Electrochemistry
Nanoparticle for energy storage materials
Material Science
Jose E Garcia Arraras
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
89
55
0.618
Lutful Bari Bhuiyan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
87
18
0.207
liquids
colloids and polyelectrolytes
chemical physics
statistical mechanics
Samuel P Hernandez Rivera
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
81
26
0.321
Explosives Properties and Detection
Spectroscopy based Detection of Che-Bio Threats
Chemometrics Enhanced Spectroscopy
Gary A Toranzos
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
70
30
0.429
Environmental Microbiology
Microbial Ecology
Nicholas Brokaw
Universidad de Puerto Rico
Rawalakot, Puerto Rico
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
69
45
0.652
Tropical forest structure and diversity