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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 Jan 03, 2026, 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 (1.131.752) 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
6,860
World Rank
10
Country Rank
2
University
Ranking Based On Selection:
1
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
18,849
World Rank
30
Country Rank
5
University
Ranking Based On Selection:
2
Engineering & Technology / Energy Engineering
Energy Finance | Green Finance | Climate Change | Equity Market | Sustainable Developmen
Energy Finance | Green Finance | Climate Change | Equity Market | Sustainable Developmen
H-Index Metrics
-
H-Index85
-
i10 Index192
-
Citation Counts24,896
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* Total H Index Rankings
Rankings
51,295
World Rank
143
Country Rank
23
University
Ranking Based On Selection:
3
Engineering & Technology / Energy Engineering
Energy Engineering | Renewable Energy | Hydrogen Energy | Energy Policy | Electric Vehicl
Energy Engineering | Renewable Energy | Hydrogen Energy | Energy Policy | Electric Vehicl
H-Index Metrics
-
H-Index62
-
i10 Index168
-
Citation Counts15,341
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* Total H Index Rankings
Rankings
114,809
World Rank
499
Country Rank
41
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
121,649
World Rank
537
Country Rank
64
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
124,827
World Rank
545
Country Rank
100
University
Ranking Based On Selection:
6
* Total H Index Rankings
Rankings
125,463
World Rank
552
Country Rank
21
University
Ranking Based On Selection:
7
* Total H Index Rankings
Rankings
147,318
World Rank
672
Country Rank
6
University
Ranking Based On Selection:
8
Engineering & Technology / Energy Engineering
bio-fuel | microwave reactions | green chemistry | bio-material
bio-fuel | microwave reactions | green chemistry | bio-material
H-Index Metrics
-
H-Index41
-
i10 Index90
-
Citation Counts8,430
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* Total H Index Rankings
Rankings
159,330
World Rank
746
Country Rank
6
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
163,234
World Rank
763
Country Rank
152
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
166,397
World Rank
800
Country Rank
98
University
Ranking Based On Selection:
11
Engineering & Technology / Energy Engineering
Deregulated Power System | Transmission pricing | Energy Efficiency | Renewable Energ
Deregulated Power System | Transmission pricing | Energy Efficiency | Renewable Energ
H-Index Metrics
-
H-Index39
-
i10 Index99
-
Citation Counts7,308
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* Total H Index Rankings
Rankings
181,492
World Rank
878
Country Rank
33
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
185,644
World Rank
917
Country Rank
110
University
Ranking Based On Selection:
13
Engineering & Technology / Energy Engineering
Energy Recovery | Engine Boosting & Internal Combustion Engine
Energy Recovery | Engine Boosting & Internal Combustion Engine
H-Index Metrics
-
H-Index37
-
i10 Index83
-
Citation Counts5,408
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* Total H Index Rankings
Rankings
191,794
World Rank
937
Country Rank
125
University
Ranking Based On Selection:
14
Engineering & Technology / Energy Engineering
Solar Energy | Biofuels | Renewable Energy | Energy Efficiency and Policy | Materials
Solar Energy | Biofuels | Renewable Energy | Energy Efficiency and Policy | Materials
H-Index Metrics
-
H-Index36
-
i10 Index81
-
Citation Counts10,011
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* Total H Index Rankings
Rankings
215,665
World Rank
1,092
Country Rank
28
University
Ranking Based On Selection:
15
Engineering & Technology / Energy Engineering
energy | wastewater treatment | anaerobic digestion | adsorbtion/coagulation | environmental technolog
energy | wastewater treatment | anaerobic digestion | adsorbtion/coagulation | environmental technolog
H-Index Metrics
-
H-Index34
-
i10 Index48
-
Citation Counts3,583
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* Total H Index Rankings
Rankings
227,523
World Rank
1,194
Country Rank
11
University
Ranking Based On Selection:
16
Engineering & Technology / Energy Engineering
Renewable Energy | Biomass | Waste-to-Energy | Energy Conversion Syste
Renewable Energy | Biomass | Waste-to-Energy | Energy Conversion Syste
H-Index Metrics
-
H-Index33
-
i10 Index70
-
Citation Counts5,074
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* Total H Index Rankings
Rankings
227,829
World Rank
1,202
Country Rank
228
University
Ranking Based On Selection:
17
Engineering & Technology / Energy Engineering
Power System Protection | Electrical Safety | Energy Efficiency Management | Project Managemen
Power System Protection | Electrical Safety | Energy Efficiency Management | Project Managemen
H-Index Metrics
-
H-Index33
-
i10 Index80
-
Citation Counts3,472
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* Total H Index Rankings
Rankings
228,291
World Rank
1,210
Country Rank
12
University
Ranking Based On Selection:
18
Engineering & Technology / Energy Engineering
Renewable energy | thermal management | Li-ion battery | electric vehicl
Renewable energy | thermal management | Li-ion battery | electric vehicl
H-Index Metrics
-
H-Index33
-
i10 Index79
-
Citation Counts6,309
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* Total H Index Rankings
Rankings
236,336
World Rank
1,285
Country Rank
14
University
Ranking Based On Selection:
19
Engineering & Technology / Energy Engineering
Solar cell material | Concentrating Solar Power | Nano-materials | Environmental scienc
Solar cell material | Concentrating Solar Power | Nano-materials | Environmental scienc
H-Index Metrics
-
H-Index33
-
i10 Index66
-
Citation Counts3,506
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* Total H Index Rankings
Rankings
241,801
World Rank
1,301
Country Rank
7
University
Ranking Based On Selection:
20
Engineering & Technology / Energy Engineering
Membranes | polymers | nanomaterials | CO2 capture | water treatmen
Membranes | polymers | nanomaterials | CO2 capture | water treatmen
H-Index Metrics
-
H-Index32
-
i10 Index39
-
Citation Counts3,677
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* Total H Index Rankings
Rankings
250,396
World Rank
1,389
Country Rank
157
University
Ranking Based On Selection:
21
Engineering & Technology / Energy Engineering
solar cell | materials | semiconductor | devices | nanotechnolog
solar cell | materials | semiconductor | devices | nanotechnolog
H-Index Metrics
-
H-Index32
-
i10 Index121
-
Citation Counts4,112
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* Total H Index Rankings
Rankings
274,414
World Rank
1,569
Country Rank
17
University
Ranking Based On Selection:
22
Engineering & Technology / Energy Engineering
Applied Energy | Hydrogen & Fuel Cell | Sustainable Fuels | Waste-to-Energy | HVAC&
Applied Energy | Hydrogen & Fuel Cell | Sustainable Fuels | Waste-to-Energy | HVAC&
H-Index Metrics
-
H-Index30
-
i10 Index49
-
Citation Counts4,225
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* Total H Index Rankings
Rankings
276,591
World Rank
1,591
Country Rank
25
University
Ranking Based On Selection:
23
Engineering & Technology / Energy Engineering
Renewable Energy | Thermoacoustics | Heat Transfer | Air-conditioning | Pyrolysi
Renewable Energy | Thermoacoustics | Heat Transfer | Air-conditioning | Pyrolysi
H-Index Metrics
-
H-Index30
-
i10 Index60
-
Citation Counts2,734
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* Total H Index Rankings
Rankings
282,109
World Rank
1,635
Country Rank
209
University
Ranking Based On Selection:
24
Engineering & Technology / Energy Engineering
Power System Analysis | System Security | Voltage Stabilit
Power System Analysis | System Security | Voltage Stabilit
H-Index Metrics
-
H-Index30
-
i10 Index43
-
Citation Counts5,148
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* Total H Index Rankings
Rankings
287,014
World Rank
1,652
Country Rank
43
University
Ranking Based On Selection:
25
Engineering & Technology / Energy Engineering
Phase Change Materials | Salt Hydrate | Advanced Nanomaterial | Solar Thermal Systems | Renewable Energ
Phase Change Materials | Salt Hydrate | Advanced Nanomaterial | Solar Thermal Systems | Renewable Energ
H-Index Metrics
-
H-Index29
-
i10 Index48
-
Citation Counts2,942
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Premium Data
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