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The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 5 years. As of Dec 30, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (1.131.699) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H Index Rankings
Rankings
2,364
World Rank
1
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Mechanical Engineering
MXene (Nano-Materials) | Solar Energy | Energy storage | nanofluids | Heat Transfe
MXene (Nano-Materials) | Solar Energy | Energy storage | nanofluids | Heat Transfe
H-Index Metrics
-
H-Index146
-
i10 Index601
-
Citation Counts84,750
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* Total H Index Rankings
Rankings
2,504
World Rank
2
Country Rank
1
University
Ranking Based On Selection:
2
Engineering & Technology / Metallurgical & Materials Engineering
membrane technology | nanostructured materials | hemodialysis | reverse osmosis | fuel cel
membrane technology | nanostructured materials | hemodialysis | reverse osmosis | fuel cel
H-Index Metrics
-
H-Index144
-
i10 Index1,169
-
Citation Counts98,551
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* Total H Index Rankings
Rankings
3,693
World Rank
3
Country Rank
1
University
Ranking Based On Selection:
3
Business & Management / Strategic Management
Technology Acceptance | Technology Management | Operations Management | PLS | Technology Adoptio
Technology Acceptance | Technology Management | Operations Management | PLS | Technology Adoptio
H-Index Metrics
-
H-Index131
-
i10 Index656
-
Citation Counts76,635
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* Total H Index Rankings
Rankings
3,698
World Rank
4
Country Rank
1
University
Ranking Based On Selection:
4
Engineering & Technology / Metallurgical & Materials Engineering
Composite materials | Biocomposite | Design for Sustainability | Natural fibre composite
Composite materials | Biocomposite | Design for Sustainability | Natural fibre composite
H-Index Metrics
-
H-Index131
-
i10 Index743
-
Citation Counts62,793
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* Total H Index Rankings
Rankings
3,923
World Rank
5
Country Rank
1
University
Ranking Based On Selection:
5
Medical and Health Sciences / Biochemistry
Bioengineering | Biochemical Engineering | Microalgae Technology | One Health | Food Scienc
Bioengineering | Biochemical Engineering | Microalgae Technology | One Health | Food Scienc
H-Index Metrics
-
H-Index129
-
i10 Index709
-
Citation Counts65,804
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* Total H Index Rankings
Rankings
4,167
World Rank
6
Country Rank
1
University
Ranking Based On Selection:
6
* Total H Index Rankings
Rankings
4,582
World Rank
7
Country Rank
2
University
Ranking Based On Selection:
7
Engineering & Technology / Metallurgical & Materials Engineering
Hybrid composites | Biocomposite | Natural fibre composites | Polymer composites | Composite Material
Hybrid composites | Biocomposite | Natural fibre composites | Polymer composites | Composite Material
H-Index Metrics
-
H-Index124
-
i10 Index569
-
Citation Counts61,194
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* Total H Index Rankings
Rankings
4,747
World Rank
8
Country Rank
1
University
Ranking Based On Selection:
8
Engineering & Technology / Electrical & Electronic Engineering
Power Electronics | Renewable Energy Systems and Energ
Power Electronics | Renewable Energy Systems and Energ
H-Index Metrics
-
H-Index123
-
i10 Index632
-
Citation Counts68,595
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* Total H Index Rankings
Rankings
5,243
World Rank
9
Country Rank
2
University
Ranking Based On Selection:
9
Engineering & Technology / Chemical Engineering
Reaction Engineering & Catalysis | Air Pollution and Waste Water Control Engineering | Fuel Technology | Nanoscience & Nanotechno
Reaction Engineering & Catalysis | Air Pollution and Waste Water Control Engineering | Fuel Technology | Nanoscience & Nanotechno
H-Index Metrics
-
H-Index120
-
i10 Index558
-
Citation Counts56,467
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* Total H Index Rankings
Rankings
6,843
World Rank
10
Country Rank
2
University
Ranking Based On Selection:
10
Engineering & Technology / Energy Engineering
Renewable Energy | Power Electronics | Drives | Electrical Engineerin
Renewable Energy | Power Electronics | Drives | Electrical Engineerin
H-Index Metrics
-
H-Index112
-
i10 Index496
-
Citation Counts49,614
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* Total H Index Rankings
Rankings
7,298
World Rank
11
Country Rank
1
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
7,576
World Rank
12
Country Rank
2
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
8,128
World Rank
13
Country Rank
1
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
Pyrolysis | Microwave Pyrolysis | Waste and Biomass Recovery | Water & Wastewater Treatment | Biocha
Pyrolysis | Microwave Pyrolysis | Waste and Biomass Recovery | Water & Wastewater Treatment | Biocha
H-Index Metrics
-
H-Index107
-
i10 Index474
-
Citation Counts38,724
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* Total H Index Rankings
Rankings
8,723
World Rank
14
Country Rank
3
University
Ranking Based On Selection:
14
Engineering & Technology / Civil Engineering
Rock Mechanics | Tunneling | Artificial Intelligence | Blasting | Geotechnic
Rock Mechanics | Tunneling | Artificial Intelligence | Blasting | Geotechnic
H-Index Metrics
-
H-Index105
-
i10 Index317
-
Citation Counts29,832
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* Total H Index Rankings
Rankings
10,123
World Rank
15
Country Rank
1
University
Ranking Based On Selection:
15
Engineering & Technology / Industrial & Manufacturing Engineering
Information Systems | Industrial Management | Quality Management | Mobile Technology | Technology Adoptio
Information Systems | Industrial Management | Quality Management | Mobile Technology | Technology Adoptio
H-Index Metrics
-
H-Index101
-
i10 Index215
-
Citation Counts38,815
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* Total H Index Rankings
Rankings
10,908
World Rank
16
Country Rank
1
University
Ranking Based On Selection:
16
Engineering & Technology / Computer Science
Cybersecurity | AI | Security and Privacy | Agentic AI | Software Engineerin
Cybersecurity | AI | Security and Privacy | Agentic AI | Software Engineerin
H-Index Metrics
-
H-Index99
-
i10 Index451
-
Citation Counts26,610
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* Total H Index Rankings
Rankings
12,220
World Rank
17
Country Rank
2
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
Droughts | Climate Change | Statistical hydrology | Groundwater hydrology | Hydrologica
Droughts | Climate Change | Statistical hydrology | Groundwater hydrology | Hydrologica
H-Index Metrics
-
H-Index96
-
i10 Index382
-
Citation Counts28,748
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* Total H Index Rankings
Rankings
13,214
World Rank
19
Country Rank
4
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
14,799
World Rank
20
Country Rank
1
University
Ranking Based On Selection:
19
Engineering & Technology / Mechanical Engineering
Combustion | Nanofluid Heat Transfer | Renewable Energy | Computational Fluid Dynamic
Combustion | Nanofluid Heat Transfer | Renewable Energy | Computational Fluid Dynamic
H-Index Metrics
-
H-Index91
-
i10 Index292
-
Citation Counts24,966
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* Total H Index Rankings
Rankings
14,875
World Rank
21
Country Rank
3
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
15,026
World Rank
22
Country Rank
5
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
15,564
World Rank
23
Country Rank
4
University
Ranking Based On Selection:
22
Natural Sciences / Chemical Sciences
Fats and Oils Chemistry and Technology | Food Nanotechonlogy | Food Technolog
Fats and Oils Chemistry and Technology | Food Nanotechonlogy | Food Technolog
H-Index Metrics
-
H-Index91
-
i10 Index425
-
Citation Counts27,889
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* Total H Index Rankings
Rankings
16,051
World Rank
24
Country Rank
3
University
Ranking Based On Selection:
23
Others
AI in Energy and Power Applications | Renewable Energy | Energy Storage | Hydrogen | Power Electronics
AI in Energy and Power Applications | Renewable Energy | Energy Storage | Hydrogen | Power Electronics
H-Index Metrics
-
H-Index89
-
i10 Index305
-
Citation Counts33,635
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* Total H Index Rankings
Rankings
16,075
World Rank
25
Country Rank
5
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
16,952
World Rank
26
Country Rank
4
University
Ranking Based On Selection:
25
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