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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 05, 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 (1.131.911) 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
3,491
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
68,104
World Rank
84
Country Rank
30
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
78,922
World Rank
104
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
82,945
World Rank
110
Country Rank
28
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
101,439
World Rank
144
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
101,494
World Rank
145
Country Rank
38
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
119,870
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
182,008
World Rank
290
Country Rank
74
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
216,081
World Rank
365
Country Rank
89
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
309,074
World Rank
568
Country Rank
108
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
340,649
World Rank
647
Country Rank
133
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
368,386
World Rank
707
Country Rank
134
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
371,792
World Rank
719
Country Rank
137
University
Ranking Based On Selection:
13
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
405,258
World Rank
792
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
447,083
World Rank
887
Country Rank
171
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
709,060
World Rank
1,465
Country Rank
257
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-Index16
-
i10 Index23
-
Citation Counts685
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* Total H Index Rankings
Rankings
1,005,039
World Rank
2,076
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
1,157,329
World Rank
2,380
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
1,418,784
World Rank
2,833
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
1,603,618
World Rank
3,161
Country Rank
14
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
1,966,233
World Rank
3,791
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
2,210,438
World Rank
4,150
Country Rank
33
University
Ranking Based On Selection:
22
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