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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 06, 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 (0) 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
3,497
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
7,615
World Rank
10
Country Rank
1
University
Ranking Based On Selection:
2
Engineering & Technology / Energy Engineering
• Renewable Energy Systems. • Desiccant Dehumidification Systems. • Refrigeration and Ai
• Renewable Energy Systems. • Desiccant Dehumidification Systems. • Refrigeration and Ai
H-Index Metrics
-
H-Index109
-
i10 Index385
-
Citation Counts35,053
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* Total H Index Rankings
Rankings
10,172
World Rank
35
Country Rank
20
University
Ranking Based On Selection:
3
Engineering & Technology / Energy Engineering
photovoltaics | solar cells | materials science | semiconductors | interface
photovoltaics | solar cells | materials science | semiconductors | interface
H-Index Metrics
-
H-Index101
-
i10 Index279
-
Citation Counts40,760
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* Total H Index Rankings
Rankings
30,300
World Rank
97
Country Rank
6
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
31,265
World Rank
35
Country Rank
1
University
Ranking Based On Selection:
5
Engineering & Technology / Energy Engineering
Renewable Energy Systems | Power Systems Dynamics and Control | Energy Storage Systems | Smart Gri
Renewable Energy Systems | Power Systems Dynamics and Control | Energy Storage Systems | Smart Gri
H-Index Metrics
-
H-Index73
-
i10 Index267
-
Citation Counts16,908
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* Total H Index Rankings
Rankings
31,421
World Rank
99
Country Rank
42
University
Ranking Based On Selection:
6
Engineering & Technology / Energy Engineering
energy capture | conductive polymers | photovoltaics | energy material
energy capture | conductive polymers | photovoltaics | energy material
H-Index Metrics
-
H-Index73
-
i10 Index176
-
Citation Counts20,286
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* Total H Index Rankings
Rankings
32,950
World Rank
108
Country Rank
8
University
Ranking Based On Selection:
7
* Total H Index Rankings
Rankings
35,690
World Rank
40
Country Rank
2
University
Ranking Based On Selection:
8
Engineering & Technology / Energy Engineering
Energy systems | Renewable energy | Hydrogen production | Energy storage/management | PV Coolin
Energy systems | Renewable energy | Hydrogen production | Energy storage/management | PV Coolin
H-Index Metrics
-
H-Index70
-
i10 Index181
-
Citation Counts12,314
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* Total H Index Rankings
Rankings
44,259
World Rank
157
Country Rank
3
University
Ranking Based On Selection:
9
Engineering & Technology / Energy Engineering
Renewable energy | Sustainable development | Desalination | Water treatmen
Renewable energy | Sustainable development | Desalination | Water treatmen
H-Index Metrics
-
H-Index66
-
i10 Index161
-
Citation Counts16,500
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* Total H Index Rankings
Rankings
44,752
World Rank
160
Country Rank
14
University
Ranking Based On Selection:
10
Engineering & Technology / Energy Engineering
Innovation | Renewable Energy | Sustainability | Energy Efficiency | Wate
Innovation | Renewable Energy | Sustainability | Energy Efficiency | Wate
H-Index Metrics
-
H-Index65
-
i10 Index129
-
Citation Counts14,909
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* Total H Index Rankings
Rankings
49,326
World Rank
59
Country Rank
3
University
Ranking Based On Selection:
11
Engineering & Technology / Energy Engineering
Energy Materials | Energy Engineering | Green Hydrogen and Solar Energy | Energy Storage | E-Waste Recyclin
Energy Materials | Energy Engineering | Green Hydrogen and Solar Energy | Energy Storage | E-Waste Recyclin
H-Index Metrics
-
H-Index63
-
i10 Index292
-
Citation Counts15,613
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* Total H Index Rankings
Rankings
66,535
World Rank
97
Country Rank
7
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
68,189
World Rank
84
Country Rank
30
University
Ranking Based On Selection:
13
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
70,512
World Rank
286
Country Rank
23
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
79,027
World Rank
104
Country Rank
26
University
Ranking Based On Selection:
15
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
79,366
World Rank
28
Country Rank
1
University
Ranking Based On Selection:
16
Engineering & Technology / Energy Engineering
Energy Harvesting | Heat Recovery | Renewable Energy | Green Hydrogen | Green to Gree
Energy Harvesting | Heat Recovery | Renewable Energy | Green Hydrogen | Green to Gree
H-Index Metrics
-
H-Index53
-
i10 Index129
-
Citation Counts10,616
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* Total H Index Rankings
Rankings
80,100
World Rank
347
Country Rank
99
University
Ranking Based On Selection:
17
Engineering & Technology / Energy Engineering
Energy | Combustion | Chemical Kinetics | Laser-based Sensor
Energy | Combustion | Chemical Kinetics | Laser-based Sensor
H-Index Metrics
-
H-Index53
-
i10 Index205
-
Citation Counts11,659
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* Total H Index Rankings
Rankings
83,041
World Rank
110
Country Rank
28
University
Ranking Based On Selection:
18
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
83,236
World Rank
357
Country Rank
28
University
Ranking Based On Selection:
19
Engineering & Technology / Energy Engineering
Renewable Energy | Energy Transition | Energy Conservation & Management | Life Cycle Analysis | Sustainable Building
Renewable Energy | Energy Transition | Energy Conservation & Management | Life Cycle Analysis | Sustainable Building
H-Index Metrics
-
H-Index52
-
i10 Index125
-
Citation Counts10,917
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* Total H Index Rankings
Rankings
87,343
World Rank
89
Country Rank
22
University
Ranking Based On Selection:
20
Engineering & Technology / Energy Engineering
Energy | Renewable Energy | Sustainable Energy Carriers | Solar Fuels | Solar Desalinatio
Energy | Renewable Energy | Sustainable Energy Carriers | Solar Fuels | Solar Desalinatio
H-Index Metrics
-
H-Index51
-
i10 Index150
-
Citation Counts9,290
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* Total H Index Rankings
Rankings
87,506
World Rank
373
Country Rank
59
University
Ranking Based On Selection:
21
Engineering & Technology / Energy Engineering
Renewable Energy | Distributed generation | Motor Drives | Energy Storage Systems | Smart Gri
Renewable Energy | Distributed generation | Motor Drives | Energy Storage Systems | Smart Gri
H-Index Metrics
-
H-Index51
-
i10 Index157
-
Citation Counts8,537
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* Total H Index Rankings
Rankings
93,139
World Rank
15
Country Rank
6
University
Ranking Based On Selection:
22
Engineering & Technology / Energy Engineering
Photovoltaic systems | Solar radiation modeling | AI applications | Distributed generatio
Photovoltaic systems | Solar radiation modeling | AI applications | Distributed generatio
H-Index Metrics
-
H-Index50
-
i10 Index114
-
Citation Counts8,494
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* Total H Index Rankings
Rankings
94,987
World Rank
404
Country Rank
12
University
Ranking Based On Selection:
23
Engineering & Technology / Energy Engineering
Energy Storage | Polymers | Nanomaterials | Biomaterial
Energy Storage | Polymers | Nanomaterials | Biomaterial
H-Index Metrics
-
H-Index50
-
i10 Index181
-
Citation Counts7,691
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* Total H Index Rankings
Rankings
96,793
World Rank
415
Country Rank
109
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
101,544
World Rank
145
Country Rank
37
University
Ranking Based On Selection:
25
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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