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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 31, 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 (1.131.755) 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
3,704
World Rank
3
Country Rank
2
University
Ranking Based On Selection:
1
Engineering & Technology / Energy Engineering
Renewable Energy | Energy Storage Systems | CAD and Design | Smart Material
Renewable Energy | Energy Storage Systems | CAD and Design | Smart Material
H-Index Metrics
-
H-Index133
-
i10 Index514
-
Citation Counts61,368
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* Total H Index Rankings
Rankings
71,473
World Rank
86
Country Rank
31
University
Ranking Based On Selection:
2
Engineering & Technology / Energy Engineering
Estimation and Control Systems | Renewable Energy Systems | Optimizatio
Estimation and Control Systems | Renewable Energy Systems | Optimizatio
H-Index Metrics
-
H-Index56
-
i10 Index230
-
Citation Counts11,505
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* Total H Index Rankings
Rankings
82,805
World Rank
107
Country Rank
26
University
Ranking Based On Selection:
3
Engineering & Technology / Energy Engineering
Sustainable energy | renewable energy | energy efficiency | combustion | CF
Sustainable energy | renewable energy | energy efficiency | combustion | CF
H-Index Metrics
-
H-Index53
-
i10 Index148
-
Citation Counts8,875
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* Total H Index Rankings
Rankings
91,653
World Rank
125
Country Rank
31
University
Ranking Based On Selection:
4
Engineering & Technology / Energy Engineering
Sustainable Energy Systems | Renewable Energy | Biomass & Bioenergy | Process System Engineerin
Sustainable Energy Systems | Renewable Energy | Biomass & Bioenergy | Process System Engineerin
H-Index Metrics
-
H-Index52
-
i10 Index141
-
Citation Counts10,528
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* Total H Index Rankings
Rankings
101,274
World Rank
143
Country Rank
37
University
Ranking Based On Selection:
5
Engineering & Technology / Energy Engineering
Renewable Energy | Fuel cells | Membrane separation | Adsorption | Desalination
Renewable Energy | Fuel cells | Membrane separation | Adsorption | Desalination
H-Index Metrics
-
H-Index48
-
i10 Index113
-
Citation Counts8,403
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* Total H Index Rankings
Rankings
106,498
World Rank
152
Country Rank
40
University
Ranking Based On Selection:
6
Engineering & Technology / Energy Engineering
Renewable Energy | Solar Materials | Mechanical Energy Storage | Solar Manufacturin
Renewable Energy | Solar Materials | Mechanical Energy Storage | Solar Manufacturin
H-Index Metrics
-
H-Index48
-
i10 Index127
-
Citation Counts10,336
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* Total H Index Rankings
Rankings
119,680
World Rank
175
Country Rank
47
University
Ranking Based On Selection:
7
Engineering & Technology / Energy Engineering
Solar cooling systems | Adsorption | Desalination | Water harvesting from atmospheric ai
Solar cooling systems | Adsorption | Desalination | Water harvesting from atmospheric ai
H-Index Metrics
-
H-Index45
-
i10 Index73
-
Citation Counts5,833
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* Total H Index Rankings
Rankings
192,158
World Rank
304
Country Rank
78
University
Ranking Based On Selection:
8
Engineering & Technology / Energy Engineering
Smart Grid | Renewable Energy | Control | Power Electronic
Smart Grid | Renewable Energy | Control | Power Electronic
H-Index Metrics
-
H-Index37
-
i10 Index79
-
Citation Counts3,776
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* Total H Index Rankings
Rankings
228,765
World Rank
384
Country Rank
92
University
Ranking Based On Selection:
9
Engineering & Technology / Energy Engineering
Smart Grids | Microgrids | Renewable Energy Resources | Electrical Storage Systems | Distributed Generatio
Smart Grids | Microgrids | Renewable Energy Resources | Electrical Storage Systems | Distributed Generatio
H-Index Metrics
-
H-Index34
-
i10 Index68
-
Citation Counts6,590
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* Total H Index Rankings
Rankings
308,638
World Rank
554
Country Rank
104
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
340,210
World Rank
636
Country Rank
128
University
Ranking Based On Selection:
11
Engineering & Technology / Energy Engineering
DC-DC | AC-DC | Power factor correction | Renewable energy application
DC-DC | AC-DC | Power factor correction | Renewable energy application
H-Index Metrics
-
H-Index27
-
i10 Index47
-
Citation Counts3,637
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* Total H Index Rankings
Rankings
371,283
World Rank
709
Country Rank
135
University
Ranking Based On Selection:
12
Engineering & Technology / Energy Engineering
solar photovoltaics | perovskite solar cells | organic solar cells | graphene | optoelectronic
solar photovoltaics | perovskite solar cells | organic solar cells | graphene | optoelectronic
H-Index Metrics
-
H-Index25
-
i10 Index36
-
Citation Counts3,195
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* Total H Index Rankings
Rankings
389,734
World Rank
748
Country Rank
142
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
404,776
World Rank
781
Country Rank
78
University
Ranking Based On Selection:
14
Engineering & Technology / Energy Engineering
Motor Drives | Hybrid and Electric Vehicle | Renewable Energy System | Power Syste
Motor Drives | Hybrid and Electric Vehicle | Renewable Energy System | Power Syste
H-Index Metrics
-
H-Index24
-
i10 Index44
-
Citation Counts1,804
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* Total H Index Rankings
Rankings
446,797
World Rank
871
Country Rank
166
University
Ranking Based On Selection:
15
Engineering & Technology / Energy Engineering
Renewable Energy | Thermal Comfort | Indoor Air Quality | HVA
Renewable Energy | Thermal Comfort | Indoor Air Quality | HVA
H-Index Metrics
-
H-Index22
-
i10 Index31
-
Citation Counts2,659
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* Total H Index Rankings
Rankings
708,484
World Rank
1,459
Country Rank
256
University
Ranking Based On Selection:
16
Engineering & Technology / Energy Engineering
Energy | Safety & Reliability | Risk analysis | Radiation detection & measurement | Nuclear Safeguard
Energy | Safety & Reliability | Risk analysis | Radiation detection & measurement | Nuclear Safeguard
H-Index Metrics
-
H-Index15
-
i10 Index23
-
Citation Counts670
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* Total H Index Rankings
Rankings
1,004,037
World Rank
2,065
Country Rank
346
University
Ranking Based On Selection:
17
Engineering & Technology / Energy Engineering
Heat Transfer | Computational Fluid Dynamics | Thermodynamics | HVA
Heat Transfer | Computational Fluid Dynamics | Thermodynamics | HVA
H-Index Metrics
-
H-Index10
-
i10 Index11
-
Citation Counts413
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* Total H Index Rankings
Rankings
1,155,867
World Rank
2,376
Country Rank
4
University
Ranking Based On Selection:
18
Engineering & Technology / Energy Engineering
Aircraft Propulsion | Rotating Equipment - Engine Diagnostics and Prognostics | Energy and Renewable Energy | Power and Sustainabi
Aircraft Propulsion | Rotating Equipment - Engine Diagnostics and Prognostics | Energy and Renewable Energy | Power and Sustainabi
H-Index Metrics
-
H-Index9
-
i10 Index9
-
Citation Counts423
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* Total H Index Rankings
Rankings
1,416,789
World Rank
2,826
Country Rank
72
University
Ranking Based On Selection:
19
Engineering & Technology / Energy Engineering
Renewable Energy System | Free-Piston Linear Generator | Computational Fluid Dynamic
Renewable Energy System | Free-Piston Linear Generator | Computational Fluid Dynamic
H-Index Metrics
-
H-Index7
-
i10 Index4
-
Citation Counts132
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* Total H Index Rankings
Rankings
1,601,596
World Rank
3,157
Country Rank
14
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
1,964,189
World Rank
3,788
Country Rank
19
University
Ranking Based On Selection:
21
Engineering & Technology / Energy Engineering
Control Engineering | Process Control | OT Security | Control in Power Engineering | Renewable Energ
Control Engineering | Process Control | OT Security | Control in Power Engineering | Renewable Energ
H-Index Metrics
-
H-Index4
-
i10 Index3
-
Citation Counts184
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* Total H Index Rankings
Rankings
2,208,994
World Rank
4,151
Country Rank
33
University
Ranking Based On Selection:
22
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