The ranking of “Top 100” scientists is based on total h-index scores. Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, EECA, BRICS, and COMESA based on total h-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, and Social Sciences. According to Total H. BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (829,221 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.
* Rankings
World Rank
36,992
Country Rank
111
Institution Rank :
1
Wastewater Technology
Algal Biotechnology
Biofuels
Bioremediation
Metrics
H-Index
i10 Index
Citation
65
208
17,669
* Rankings
World Rank
43,978
Country Rank
137
Institution Rank :
2
Metrics
H-Index
i10 Index
Citation
62
153
15,830
* Rankings
World Rank
81,999
Country Rank
296
Institution Rank :
3
Nanoscience/nanotechnology
Materials science
Composite/nanocomposite
Water Research & Inorg. Chem
Metrics
H-Index
i10 Index
Citation
49
217
12,448
* Rankings
World Rank
83,712
Country Rank
305
Institution Rank :
4
Mathematics
Mathematical Physics
Mathematical Sciences
Metrics
H-Index
i10 Index
Citation
49
129
9,137
* Rankings
World Rank
90,651
Country Rank
335
Institution Rank :
5
General Relativity
Dark Energy
Modified theories of gravity
Cosmology
Integrability
Metrics
H-Index
i10 Index
Citation
47
140
7,868
* Rankings
World Rank
108,494
Country Rank
428
Institution Rank :
6
Biotechnology
Microbiology
Enzyme Technology
Metrics
H-Index
i10 Index
Citation
44
125
7,577
* Rankings
World Rank
116,770
Country Rank
452
Institution Rank :
7
Sport Chiropractic
Metrics
H-Index
i10 Index
Citation
43
84
5,006
* Rankings
World Rank
124,247
Country Rank
492
Institution Rank :
8
Pharmaceutical Chemistry
Metrics
H-Index
i10 Index
Citation
41
158
7,217
* Rankings
World Rank
131,692
Country Rank
534
Institution Rank :
9
Algal Biofuels
Biotechnology
Nutrient recovery
Metrics
H-Index
i10 Index
Citation
40
47
7,136
* Rankings
World Rank
157,455
Country Rank
674
Institution Rank :
10
Drug development
Metrics
H-Index
i10 Index
Citation
37
79
6,409
* Rankings
World Rank
173,781
Country Rank
746
Institution Rank :
11
Environmental Microbiology
Molecular Biology
Emerging Pathogens
Wastewater Treatment
Bioenergy from waste streams
Metrics
H-Index
i10 Index
Citation
35
79
5,542
* Rankings
World Rank
195,658
Country Rank
874
Institution Rank :
12
Applied & Theoretical Machine Learning
Knowledge Discovery and Reasoning with Uncertainty
Image and Signal Processing
Metrics
H-Index
i10 Index
Citation
33
89
5,882
* Rankings
World Rank
223,532
Country Rank
1,040
Institution Rank :
13
Computational chemistry and Electroanalytical chemistry
Metrics
H-Index
i10 Index
Citation
31
77
4,601
* Rankings
World Rank
242,055
Country Rank
1,140
Institution Rank :
14
Lignocellulose functionalisation
biocatalysis
bioactive compounds
antioxidants
oxidases
Metrics
H-Index
i10 Index
Citation
30
45
2,811
* Rankings
World Rank
243,090
Country Rank
1,147
Institution Rank :
15
Metrics
H-Index
i10 Index
Citation
30
44
2,723
* Rankings
World Rank
264,743
Country Rank
1,286
Institution Rank :
16
Tourism
Community-based tourism
Food tourism
Food
Sport event tourism
Metrics
H-Index
i10 Index
Citation
28
53
2,768
* Rankings
World Rank
292,035
Country Rank
1,433
Institution Rank :
17
criminolgy
urban studies
ethnography
urban safety
security governance
Metrics
H-Index
i10 Index
Citation
27
60
2,638
* Rankings
World Rank
293,684
Country Rank
1,443
Institution Rank :
18
Mathematical modelling
Metrics
H-Index
i10 Index
Citation
27
48
2,084
* Rankings
World Rank
324,584
Country Rank
1,618
Institution Rank :
19
Organic Chemistry
Natural Product Chemistry
Organic Synthesis
Metrics
H-Index
i10 Index
Citation
25
40
3,396
* Rankings
World Rank
326,864
Country Rank
1,635
Institution Rank :
20
Natural fiber reinforced polymer composites
Surface treatment of natural fibers
Polymer nanocomposites
Barrier properties
El
Metrics
H-Index
i10 Index
Citation
25
39
1,905
* Rankings
World Rank
338,636
Country Rank
1,697
Institution Rank :
21
Water and wastewater treatment
Liquid extraction
Adsorption
Metrics
H-Index
i10 Index
Citation
24
59
2,890
* Rankings
World Rank
381,399
Country Rank
1,967
Institution Rank :
22
Peacebuilding
restorative justice
inequality
Metrics
H-Index
i10 Index
Citation
23
64
2,122
* Rankings
World Rank
388,477
Country Rank
2,001
Institution Rank :
23
Food chemistry and processing
Metrics
H-Index
i10 Index
Citation
22
38
1,593
* Rankings
World Rank
424,821
Country Rank
2,212
Institution Rank :
24
Electrical
Electronic and Computer Engineering
Metrics
H-Index
i10 Index
Citation
21
62
2,545
* Rankings
World Rank
425,532
Country Rank
2,225
Institution Rank :
25
Natural Product Synthesis
Catalysis
Nanotechnology
Metrics
H-Index
i10 Index
Citation
21
38
2,084
* Rankings
World Rank
429,789
Country Rank
2,255
Institution Rank :
26
nanotechnology
Metrics
H-Index
i10 Index
Citation
21
32
1,808
* Rankings
World Rank
443,790
Country Rank
2,333
Institution Rank :
27
Microalgae
Algal Biotechnology
Bioremediation
Metrics
H-Index
i10 Index
Citation
20
24
2,074
* Rankings
World Rank
452,805
Country Rank
2,387
Institution Rank :
28
public management
ethics
leadership. work integrated learning
whistleblowing
Metrics
H-Index
i10 Index
Citation
20
34
1,215
* Rankings
World Rank
453,010
Country Rank
2,391
Institution Rank :
29
Entrepreneurial marketing
Entrepreneurial management
Rural development and SMME
Metrics
H-Index
i10 Index
Citation
20
33
1,110
* Rankings
World Rank
453,506
Country Rank
2,400
Institution Rank :
30
Bioprocess Technology
Environmental Microbiology
Waste Valorization
Indigenous Fermented Foods
Metrics
H-Index
i10 Index
Citation
20
30
1,845
* Rankings
World Rank
454,652
Country Rank
2,411
Institution Rank :
31
Biology
Microbiology
Biotechnology
Computational Biology
Metrics
H-Index
i10 Index
Citation
20
26
1,132
* Rankings
World Rank
458,192
Country Rank
2,437
Institution Rank :
32
Algae
Metrics
H-Index
i10 Index
Citation
20
27
1,698
* Rankings
World Rank
458,805
Country Rank
2,440
Institution Rank :
33
Molecular biology
environmental modeling
environmental monitoring
Environmental specialist
Implementation of IS0 14001:2015
Metrics
H-Index
i10 Index
Citation
20
25
1,124
* Rankings
World Rank
471,705
Country Rank
2,518
Institution Rank :
34
South African literature
Poetry
Theory
Metrics
H-Index
i10 Index
Citation
20
35
1,984
* Rankings
World Rank
480,742
Country Rank
2,560
Institution Rank :
35
Primary Health Care
Maternal and Child Health
Metrics
H-Index
i10 Index
Citation
19
33
1,140
* Rankings
World Rank
481,193
Country Rank
2,565
Institution Rank :
36
Nanotechnology
Natural products
Medicinal Plants
Non communicable chronic diseases
Metrics
H-Index
i10 Index
Citation
19
30
1,888
* Rankings
World Rank
485,340
Country Rank
2,579
Institution Rank :
37
Public health
Genetics
epidemiology
Metrics
H-Index
i10 Index
Citation
19
33
1,286
* Rankings
World Rank
489,757
Country Rank
2,608
Institution Rank :
38
marketing retail "chaos theory" "complexity theory"
Metrics
H-Index
i10 Index
Citation
19
33
1,901
* Rankings
World Rank
507,948
Country Rank
2,705
Institution Rank :
39
Functional Foods
Nutraceuticals
Antioxidants
Anticancer
Antidiabetic
Metrics
H-Index
i10 Index
Citation
18
25
1,136
* Rankings
World Rank
511,582
Country Rank
2,719
Institution Rank :
40
Sustainable Energy and porous materials
Metrics
H-Index
i10 Index
Citation
18
27
1,083
* Rankings
World Rank
527,334
Country Rank
2,814
Institution Rank :
41
Circular Economy Heterogeneous Catalysis Renewable Energy
Metrics
H-Index
i10 Index
Citation
18
27
1,048
* Rankings
World Rank
528,942
Country Rank
2,826
Institution Rank :
42
Education
Institutional Research
Data Analytics
Metrics
H-Index
i10 Index
Citation
18
22
1,564
* Rankings
World Rank
543,729
Country Rank
2,910
Institution Rank :
43
Biological wastewater treatment
Emerging Contaminants
Microplastics.
Metrics
H-Index
i10 Index
Citation
17
26
1,386
* Rankings
World Rank
566,418
Country Rank
3,028
Institution Rank :
44
Mathematics
Mathematical Physics
Differential Equations
Symmetry
Tertiary Management
Metrics
H-Index
i10 Index
Citation
17
26
830
* Rankings
World Rank
584,512
Country Rank
3,143
Institution Rank :
45
Electrochemical Sensors/Biosensors
Nanotechnology
Separation Techniques
Ionic Liquids
Metrics
H-Index
i10 Index
Citation
16
21
732
* Rankings
World Rank
611,270
Country Rank
3,308
Institution Rank :
46
Polymers and composites
chemistry
sol-gel chemistry
Metrics
H-Index
i10 Index
Citation
16
19
1,112
* Rankings
World Rank
638,697
Country Rank
3,461
Institution Rank :
47
maritime
digital transformation
teaching with technology
cyber-security
Metrics
H-Index
i10 Index
Citation
15
29
959
* Rankings
World Rank
642,885
Country Rank
3,488
Institution Rank :
48
Social work
community engagement
spirituality
Metrics
H-Index
i10 Index
Citation
15
19
592
* Rankings
World Rank
670,331
Country Rank
3,664
Institution Rank :
49
Biotechnology and Food Science
Metrics
H-Index
i10 Index
Citation
14
21
707
* Rankings
World Rank
689,870
Country Rank
3,792
Institution Rank :
50
HRM/Human & Computer interaction
Online learning
Knowledge Management
Metrics
H-Index
i10 Index
Citation
14
18
611
* Rankings
World Rank
693,770
Country Rank
3,810
Institution Rank :
51
productivity improvement
sustainable design and buildings
construction delays
Metrics
H-Index
i10 Index
Citation
14
15
546
* Rankings
World Rank
700,494
Country Rank
3,865
Institution Rank :
52
Water
Wastewater
Electrochemistry
Environmental Science
Carbon
Metrics
H-Index
i10 Index
Citation
14
15
1,259
* Rankings
World Rank
746,810
Country Rank
4,165
Institution Rank :
53
Metrics
H-Index
i10 Index
Citation
13
19
947
* Rankings
World Rank
752,255
Country Rank
4,205
Institution Rank :
54
Quality Nanotechnology
Metrics
H-Index
i10 Index
Citation
13
14
656
* Rankings
World Rank
753,332
Country Rank
4,215
Institution Rank :
55
Public Health
Epidemiology
Traditional Health Care
Community Health
Community Development
Metrics
H-Index
i10 Index
Citation
13
13
663
* Rankings
World Rank
775,688
Country Rank
4,353
Institution Rank :
56
Water
Metrics
H-Index
i10 Index
Citation
12
13
766
* Rankings
World Rank
777,157
Country Rank
4,359
Institution Rank :
57
Artificial Intelligence
Machine Learning
Intelligent Decision Support Systems
Intelligent Systems
Software Engineering
Metrics
H-Index
i10 Index
Citation
12
13
408
* Rankings
World Rank
780,295
Country Rank
4,380
Institution Rank :
58
Thermodynamics
Separation Techniques
Biosensors and Sensors
Nanotechnology
Metrics
H-Index
i10 Index
Citation
12
12
258
* Rankings
World Rank
793,843
Country Rank
4,478
Institution Rank :
59
Public governance
Entrepreneurship
Philanthropy
Higher Education Policy
Social Sciences Methods
Metrics
H-Index
i10 Index
Citation
12
15
866
* Rankings
World Rank
801,497
Country Rank
4,523
Institution Rank :
60
Undergraduate Research-Teaching Nexus
Virtual Exchange
Educational Development
Metrics
H-Index
i10 Index
Citation
12
12
394
* Rankings
World Rank
824,832
Country Rank
4,683
Institution Rank :
61
Comparative Politics
Legislative Studies
Public Governance
Public Institutions and Leadership
African Politics and governmen
Metrics
H-Index
i10 Index
Citation
11
13
750
* Rankings
World Rank
828,446
Country Rank
4,711
Institution Rank :
62
Electro & Bioanalytical chemistry
Metrics
H-Index
i10 Index
Citation
11
12
725
* Rankings
World Rank
835,723
Country Rank
4,751
Institution Rank :
63
Accounting
Environmental/Green Accounting
Integrated Reporting
Value Relevance
Corporate Social
Metrics
H-Index
i10 Index
Citation
11
11
415
* Rankings
World Rank
845,258
Country Rank
4,843
Institution Rank :
64
Power Electronics
Power System
Renewable Energy
Machines and Drives
Metrics
H-Index
i10 Index
Citation
11
12
307
* Rankings
World Rank
851,072
Country Rank
4,878
Institution Rank :
65
Marketing
Metrics
H-Index
i10 Index
Citation
11
14
537
* Rankings
World Rank
855,662
Country Rank
4,923
Institution Rank :
66
e-voting
social media
big data
Metrics
H-Index
i10 Index
Citation
11
12
404
* Rankings
World Rank
858,589
Country Rank
4,946
Institution Rank :
67
Photocatalysis
Semiconductors
Membrane Technology
Water Treatment Technologies
Metrics
H-Index
i10 Index
Citation
11
11
552
* Rankings
World Rank
879,089
Country Rank
5,094
Institution Rank :
68
Real-Time Co-Simulation
Electric Vehicle
Energy Management
Microgrid
Metrics
H-Index
i10 Index
Citation
10
14
386
* Rankings
World Rank
880,193
Country Rank
5,106
Institution Rank :
69
Hypertension in pregnancy
Metrics
H-Index
i10 Index
Citation
10
12
489
* Rankings
World Rank
885,047
Country Rank
5,155
Institution Rank :
70
Managerial accounting
Financial Management
Corporate finance
Investment decisions
Financing of Small business and Financial
Metrics
H-Index
i10 Index
Citation
10
11
357
* Rankings
World Rank
885,529
Country Rank
5,163
Institution Rank :
71
Waste and renewable biomass valorisation
wastewater treatment
anaerobic digestion
airlift reactors
engineering education
Metrics
H-Index
i10 Index
Citation
10
11
329
* Rankings
World Rank
885,903
Country Rank
5,170
Institution Rank :
72
Management
Metrics
H-Index
i10 Index
Citation
10
11
305
* Rankings
World Rank
897,475
Country Rank
5,252
Institution Rank :
73
Quantity Surveying
Dispute Resolution
Metrics
H-Index
i10 Index
Citation
10
10
239
* Rankings
World Rank
897,853
Country Rank
5,258
Institution Rank :
74
Entrepreneurship
Rural small business
Risk Management
Strategic Management
Metrics
H-Index
i10 Index
Citation
10
10
216
* Rankings
World Rank
899,207
Country Rank
5,280
Institution Rank :
75
Water Recourses Engineering
Hydrology
Hydrological modeling utilizing Artificial Intelligent
Metrics
H-Index
i10 Index
Citation
10
12
353
* Rankings
World Rank
910,077
Country Rank
5,367
Institution Rank :
76
Energy and waste water
Metrics
H-Index
i10 Index
Citation
10
10
348
* Rankings
World Rank
912,052
Country Rank
5,399
Institution Rank :
77
Microgrid
Renewable Energy Integration Power Systems (T & D)
Smart Grid
Metrics
H-Index
i10 Index
Citation
10
10
272
* Rankings
World Rank
912,778
Country Rank
5,409
Institution Rank :
78
Development Economics
Public Sector Economics
Environmental Economics
Metrics
H-Index
i10 Index
Citation
10
10
234
* Rankings
World Rank
916,565
Country Rank
5,444
Institution Rank :
79
International Trade and Finance
Metrics
H-Index
i10 Index
Citation
10
11
317
* Rankings
World Rank
934,190
Country Rank
5,603
Institution Rank :
80
public health
Metrics
H-Index
i10 Index
Citation
10
10
1,074
* Rankings
World Rank
935,238
Country Rank
5,609
Institution Rank :
81
