Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
15,038
Country Rank
1
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Riaan Steenkamp](https://cdn.adscientificindex.com/pictures/9b/3700525.jpg)
Physics
Astrophysics
Computational Physics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,931
13,423
0.354
* Total Citation Counts Rankings
World Rank
38,865
Country Rank
2
Institution Rank : 2
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Michael Backes](https://cdn.adscientificindex.com/pictures/3e/3700526.jpg)
Astrophysics
Gamma-Ray Astronomy
Multivariate Data Analysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,179
11,670
0.578
* Total Citation Counts Rankings
World Rank
141,616
Country Rank
3
Institution Rank : 3
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Roger K. Verbeeck](https://cdn.adscientificindex.com/pictures/38/3700527.jpg)
clinical pharmacokinetics
microdialysis
bioequivalence
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,044
1,534
0.218
* Total Citation Counts Rankings
World Rank
192,003
Country Rank
4
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/24749.png)
![Namibia](/flags/na.png)
![Michael Sony](https://cdn.adscientificindex.com/pictures/ee/3729458.jpg)
Production & Operations Management
Digital Transformation
Industry 4.0
Quality 4.0
Operational
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,208
4,987
0.958
* Total Citation Counts Rankings
World Rank
254,727
Country Rank
5
Institution Rank : 4
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Nic Bidwell](https://cdn.adscientificindex.com/pictures/46/3700529.jpg)
human computer interaction
digital ethics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,854
1,768
0.459
* Total Citation Counts Rankings
World Rank
265,998
Country Rank
91,725
Institution Rank : 802
![](https://cdn.adscientificindex.com/logos/11078.jpg)
![United States](/flags/us.png)
![Rodney Hopson](/user/assets/images/profile/no-profile-photo.png)
evaluation
ethnography
sociolinguistics
comparative educational reform
Namibia and southern Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,667
1,847
0.504
* Total Citation Counts Rankings
World Rank
285,216
Country Rank
6
Institution Rank : 2
![](https://cdn.adscientificindex.com/logos/24749.png)
![Namibia](/flags/na.png)
![Diptiranjan Sahu](https://cdn.adscientificindex.com/pictures/6e/3722762.jpg)
Applied Physics
Materials Science
Nanotechnology
Multifunctional Materials
Spintronics &
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,381
1,076
0.318
* Total Citation Counts Rankings
World Rank
333,235
Country Rank
7
Institution Rank : 3
![](https://cdn.adscientificindex.com/logos/24749.png)
![Namibia](/flags/na.png)
![Heike Winschiers-Theophilus](https://cdn.adscientificindex.com/pictures/94/3725433.jpg)
Design
Human Computer Interaction
Indigenous Knowledge
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,804
1,760
0.628
* Total Citation Counts Rankings
World Rank
352,454
Country Rank
8
Institution Rank : 5
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Lawrence Kazembe](https://cdn.adscientificindex.com/pictures/22/3700530.jpg)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,615
1,284
0.491
* Total Citation Counts Rankings
World Rank
386,772
Country Rank
9
Institution Rank : 6
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Grzegorz Kopij](/user/assets/images/profile/no-profile-photo.png)
ecology
zoology
ornithology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,319
1,013
0.437
* Total Citation Counts Rankings
World Rank
390,856
Country Rank
10
Institution Rank : 4
![](https://cdn.adscientificindex.com/logos/24749.png)
![Namibia](/flags/na.png)
![Uchendu Eugene Chigbu|Eugene Chigbu, Uchendu Chigbu, Eugene Uchendu Chugbu](https://cdn.adscientificindex.com/pictures/b7/4301372.jpg)
Land management
Land administration
Well-being
Land governance
Land-use planning
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,286
2,083
0.911
* Total Citation Counts Rankings
World Rank
400,060
Country Rank
12
Institution Rank : 6
![](https://cdn.adscientificindex.com/logos/24749.png)
![Namibia](/flags/na.png)
![Ben Mapani](https://cdn.adscientificindex.com/pictures/12/4098608.jpg)
Geochemistry
Tectonics
Geochronology
Environmental Science
Hydrogeology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,216
1,392
0.628
* Total Citation Counts Rankings
World Rank
405,696
Country Rank
13
Institution Rank : 7
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Dharm Singh](/user/assets/images/profile/no-profile-photo.png)
Multimedia over IP and Wireless Networs
Mobile Computing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,175
1,107
0.509
* Total Citation Counts Rankings
World Rank
411,880
Country Rank
14
Institution Rank : 8
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Mengist Teklay](/user/assets/images/profile/no-profile-photo.png)
Petrology and Geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,130
887
0.416
* Total Citation Counts Rankings
World Rank
439,437
Country Rank
15
Institution Rank : 9
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Godfrey Tawodzera](https://cdn.adscientificindex.com/pictures/b8/3700539.jpg)
Food security
migration
livelihoods
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,949
1,324
0.679
* Total Citation Counts Rankings
World Rank
444,367
Country Rank
16
Institution Rank : 10
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Gert Van Rooy](https://cdn.adscientificindex.com/pictures/26/3700542.jpg)
Equity in Health care
Disability and Vulnerability
Disaster and risk reduction
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,919
861
0.449
* Total Citation Counts Rankings
World Rank
456,032
Country Rank
17
Institution Rank : 11
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Quaye I. K](/user/assets/images/profile/no-profile-photo.png)
inflammation
biomarkers
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,851
900
0.486
* Total Citation Counts Rankings
World Rank
471,068
Country Rank
19
Institution Rank : 7
![](https://cdn.adscientificindex.com/logos/24749.png)
![Namibia](/flags/na.png)
![Michael Mutingi](https://cdn.adscientificindex.com/pictures/24/3729439.jpg)
Operations Management
Healthcare Operations Research
Metaheuristics
System Dynamics
Lean Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,766
923
0.523
* Total Citation Counts Rankings
World Rank
470,330
Country Rank
18
Institution Rank : 12
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Johnfisher Mupangwa](https://cdn.adscientificindex.com/pictures/c9/3700537.jpg)
Pasture Science
Animal Nutrition
Climate Smart Animal Production.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,770
968
0.547
* Total Citation Counts Rankings
World Rank
399,043
Country Rank
11
Institution Rank : 5
![](https://cdn.adscientificindex.com/logos/24749.png)
![Namibia](/flags/na.png)
![Rakesh Kumar](https://cdn.adscientificindex.com/pictures/49/4109742.jpg)
Queuing Theory and its applications
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,224
1,370
0.616
* Total Citation Counts Rankings
World Rank
487,671
Country Rank
20
Institution Rank : 13
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Kazhila C. Chinsembu|Kazhila CC](https://cdn.adscientificindex.com/pictures/a9/3700535.jpg)
Medicinal Plants
Ethnobotany
Drug Discovery
Molecular Biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,677
1,024
0.611
* Total Citation Counts Rankings
World Rank
494,741
Country Rank
21
Institution Rank : 14
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Charles Makanyeza](https://cdn.adscientificindex.com/pictures/07/3700576.jpg)
Strategy
Marketing
Entrepreneurship and Research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,642
1,469
0.895
* Total Citation Counts Rankings
World Rank
509,812
Country Rank
22
Institution Rank : 15
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Ateeq Rahman](https://cdn.adscientificindex.com/pictures/46/3700541.jpg)
catalysis for organic transformations
nano catalysis
environmental chemistry
renewable energy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,571
649
0.413
* Total Citation Counts Rankings
World Rank
526,275
Country Rank
23
Institution Rank : 8
![](https://cdn.adscientificindex.com/logos/24749.png)
![Namibia](/flags/na.png)
![Edosa Omoregie](https://cdn.adscientificindex.com/pictures/5e/3723025.jpg)
Fish Toxicology
Aquatic Ecotoxicology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,497
561
0.375
* Total Citation Counts Rankings
World Rank
526,615
Country Rank
24
Institution Rank : 16
![](https://cdn.adscientificindex.com/logos/11218.png)
![Namibia](/flags/na.png)
![Timothy Sibanda](https://cdn.adscientificindex.com/pictures/73/3700543.jpg)
Microbiology
molecular microbiology
biotechnology
water quality
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,495
1,141
0.763
* Total Citation Counts Rankings
World Ranking
15,038
Country Ranking
1
Institution Ranking
1
Riaan Steenkamp
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,931
13,423
0.354
* Total Citation Counts Rankings
World Ranking
38,865
Country Ranking
2
Institution Ranking
2
Michael Backes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
20,179
11,670
0.578
![](https://cdn.adscientificindex.com/logos/11218.png)
Astrophysics
Gamma-Ray Astronomy
Multivariate Data Analysis
* Total Citation Counts Rankings
World Ranking
141,616
Country Ranking
3
Institution Ranking
3
Roger K. Verbeeck
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,044
1,534
0.218
![](https://cdn.adscientificindex.com/logos/11218.png)
clinical pharmacokinetics
microdialysis
bioequivalence
* Total Citation Counts Rankings
World Ranking
192,003
Country Ranking
4
Institution Ranking
1
Michael Sony
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,208
4,987
0.958
![](https://cdn.adscientificindex.com/logos/24749.png)
Production & Operations Management
Digital Transformation
Industry 4.0
Quality 4.0
Operational
* Total Citation Counts Rankings
World Ranking
254,727
Country Ranking
5
Institution Ranking
4
Nic Bidwell
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,854
1,768
0.459
* Total Citation Counts Rankings
World Ranking
265,998
Country Ranking
91,725
Institution Ranking
802
Rodney Hopson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,667
1,847
0.504
![](https://cdn.adscientificindex.com/logos/11078.jpg)
evaluation
ethnography
sociolinguistics
comparative educational reform
Namibia and southern Africa
* Total Citation Counts Rankings
World Ranking
285,216
Country Ranking
6
Institution Ranking
2
Diptiranjan Sahu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,381
1,076
0.318
![](https://cdn.adscientificindex.com/logos/24749.png)
Applied Physics
Materials Science
Nanotechnology
Multifunctional Materials
Spintronics &
* Total Citation Counts Rankings
World Ranking
333,235
Country Ranking
7
Institution Ranking
3
Heike Winschiers-Theophilus
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,804
1,760
0.628
![](https://cdn.adscientificindex.com/logos/24749.png)
Design
Human Computer Interaction
Indigenous Knowledge
* Total Citation Counts Rankings
World Ranking
352,454
Country Ranking
8
Institution Ranking
5
Lawrence Kazembe
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,615
1,284
0.491
* Total Citation Counts Rankings
World Ranking
386,772
Country Ranking
9
Institution Ranking
6
Grzegorz Kopij
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,319
1,013
0.437
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* Total Citation Counts Rankings
World Ranking
390,856
Country Ranking
10
Institution Ranking
4
Uchendu Eugene Chigbu|Eugene Chigbu, Uchendu Chigbu, Eugene Uchendu Chugbu
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,286
2,083
0.911
![](https://cdn.adscientificindex.com/logos/24749.png)
Land management
Land administration
Well-being
Land governance
Land-use planning
* Total Citation Counts Rankings
World Ranking
400,060
Country Ranking
12
Institution Ranking
6
Ben Mapani
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,216
1,392
0.628
![](https://cdn.adscientificindex.com/logos/24749.png)
Geochemistry
Tectonics
Geochronology
Environmental Science
Hydrogeology
* Total Citation Counts Rankings
World Ranking
405,696
Country Ranking
13
Institution Ranking
7
Dharm Singh
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,175
1,107
0.509
* Total Citation Counts Rankings
World Ranking
411,880
Country Ranking
14
Institution Ranking
8
Mengist Teklay
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,130
887
0.416
* Total Citation Counts Rankings
World Ranking
439,437
Country Ranking
15
Institution Ranking
9
Godfrey Tawodzera
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,949
1,324
0.679
* Total Citation Counts Rankings
World Ranking
444,367
Country Ranking
16
Institution Ranking
10
Gert Van Rooy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,919
861
0.449
![](https://cdn.adscientificindex.com/logos/11218.png)
Equity in Health care
Disability and Vulnerability
Disaster and risk reduction
* Total Citation Counts Rankings
World Ranking
456,032
Country Ranking
17
Institution Ranking
11
Quaye I. K
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,851
900
0.486
* Total Citation Counts Rankings
World Ranking
471,068
Country Ranking
19
Institution Ranking
7
Michael Mutingi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,766
923
0.523
![](https://cdn.adscientificindex.com/logos/24749.png)
Operations Management
Healthcare Operations Research
Metaheuristics
System Dynamics
Lean Systems
* Total Citation Counts Rankings
World Ranking
470,330
Country Ranking
18
Institution Ranking
12
Johnfisher Mupangwa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,770
968
0.547
![](https://cdn.adscientificindex.com/logos/11218.png)
Pasture Science
Animal Nutrition
Climate Smart Animal Production.
* Total Citation Counts Rankings
World Ranking
399,043
Country Ranking
11
Institution Ranking
5
Rakesh Kumar
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,224
1,370
0.616
![](https://cdn.adscientificindex.com/logos/24749.png)
Queuing Theory and its applications
* Total Citation Counts Rankings
World Ranking
487,671
Country Ranking
20
Institution Ranking
13
Kazhila C. Chinsembu|Kazhila CC
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,677
1,024
0.611
![](https://cdn.adscientificindex.com/logos/11218.png)
Medicinal Plants
Ethnobotany
Drug Discovery
Molecular Biology
* Total Citation Counts Rankings
World Ranking
494,741
Country Ranking
21
Institution Ranking
14
Charles Makanyeza
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,642
1,469
0.895
![](https://cdn.adscientificindex.com/logos/11218.png)
Strategy
Marketing
Entrepreneurship and Research
* Total Citation Counts Rankings
World Ranking
509,812
Country Ranking
22
Institution Ranking
15
Ateeq Rahman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,571
649
0.413
![](https://cdn.adscientificindex.com/logos/11218.png)
catalysis for organic transformations
nano catalysis
environmental chemistry
renewable energy
* Total Citation Counts Rankings
World Ranking
526,275
Country Ranking
23
Institution Ranking
8
Edosa Omoregie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,497
561
0.375
![](https://cdn.adscientificindex.com/logos/24749.png)
Fish Toxicology
Aquatic Ecotoxicology
* Total Citation Counts Rankings
World Ranking
526,615
Country Ranking
24
Institution Ranking
16
Timothy Sibanda
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,495
1,141
0.763
![](https://cdn.adscientificindex.com/logos/11218.png)
Microbiology
molecular microbiology
biotechnology
water quality