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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 01, 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 (1.131.755) 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
2,863
World Rank
3
Country Rank
1
University
Ranking Based On Selection:
1
* Total H Index Rankings
Rankings
37,331
World Rank
30
Country Rank
11
University
Ranking Based On Selection:
2
Engineering & Technology / Chemical Engineering
Ionic liquids | natural gas hydrates | membrane distilation CO2 conversion | wastewater treatment | adsorptio
Ionic liquids | natural gas hydrates | membrane distilation CO2 conversion | wastewater treatment | adsorptio
H-Index Metrics
-
H-Index69
-
i10 Index191
-
Citation Counts20,296
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* Total H Index Rankings
Rankings
40,636
World Rank
33
Country Rank
13
University
Ranking Based On Selection:
3
* Total H Index Rankings
Rankings
75,838
World Rank
80
Country Rank
34
University
Ranking Based On Selection:
4
Engineering & Technology / Chemical Engineering
Solar Thermal Processes | Alternative Fuels | CO2 Capture & Utilization | Materials and Catalysi
Solar Thermal Processes | Alternative Fuels | CO2 Capture & Utilization | Materials and Catalysi
H-Index Metrics
-
H-Index54
-
i10 Index128
-
Citation Counts7,330
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* Total H Index Rankings
Rankings
97,114
World Rank
104
Country Rank
47
University
Ranking Based On Selection:
5
Engineering & Technology / Chemical Engineering
Reaction and Catalysis | Catalysts synthesis | Mixed metal oxides | Combustion synthesi
Reaction and Catalysis | Catalysts synthesis | Mixed metal oxides | Combustion synthesi
H-Index Metrics
-
H-Index49
-
i10 Index117
-
Citation Counts6,617
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* Total H Index Rankings
Rankings
101,582
World Rank
108
Country Rank
49
University
Ranking Based On Selection:
6
Engineering & Technology / Chemical Engineering
Materials | Composites | Coatings | Corrosion | Energ
Materials | Composites | Coatings | Corrosion | Energ
H-Index Metrics
-
H-Index48
-
i10 Index120
-
Citation Counts7,399
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* Total H Index Rankings
Rankings
107,091
World Rank
111
Country Rank
52
University
Ranking Based On Selection:
7
Engineering & Technology / Chemical Engineering
Complex Fluids | Formulation | Colloids and Surfaces | Wastewater Treatmen
Complex Fluids | Formulation | Colloids and Surfaces | Wastewater Treatmen
H-Index Metrics
-
H-Index47
-
i10 Index130
-
Citation Counts9,945
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* Total H Index Rankings
Rankings
107,138
World Rank
112
Country Rank
53
University
Ranking Based On Selection:
8
Engineering & Technology / Chemical Engineering
Desalination | Water Treatment and Reuse. Crystallizatio
Desalination | Water Treatment and Reuse. Crystallizatio
H-Index Metrics
-
H-Index47
-
i10 Index104
-
Citation Counts6,671
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* Total H Index Rankings
Rankings
165,730
World Rank
186
Country Rank
89
University
Ranking Based On Selection:
9
Engineering & Technology / Chemical Engineering
Advanced Materials | Adsorption | Membrane Separations | Energy Conversio
Advanced Materials | Adsorption | Membrane Separations | Energy Conversio
H-Index Metrics
-
H-Index39
-
i10 Index82
-
Citation Counts7,487
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* Total H Index Rankings
Rankings
172,227
World Rank
191
Country Rank
91
University
Ranking Based On Selection:
10
Engineering & Technology / Chemical Engineering
Molecular Simulations | Gas Processing | Water Treatment | Catalysis and Renewable Energ
Molecular Simulations | Gas Processing | Water Treatment | Catalysis and Renewable Energ
H-Index Metrics
-
H-Index38
-
i10 Index85
-
Citation Counts8,510
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* Total H Index Rankings
Rankings
185,423
World Rank
210
Country Rank
101
University
Ranking Based On Selection:
11
Engineering & Technology / Chemical Engineering
Electrochemistry | Energy Storage Devices | Nanomaterials | Analytical Chemistry | Environmental Chemistr
Electrochemistry | Energy Storage Devices | Nanomaterials | Analytical Chemistry | Environmental Chemistr
H-Index Metrics
-
H-Index37
-
i10 Index81
-
Citation Counts4,599
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* Total H Index Rankings
Rankings
259,462
World Rank
277
Country Rank
58
University
Ranking Based On Selection:
12
Engineering & Technology / Chemical Engineering
Enabling & Strategic Tech | Renewable Energy | Chemical Eng | Environmental Sciences | Nanomaterial
Enabling & Strategic Tech | Renewable Energy | Chemical Eng | Environmental Sciences | Nanomaterial
H-Index Metrics
-
H-Index31
-
i10 Index48
-
Citation Counts2,940
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* Total H Index Rankings
Rankings
295,587
World Rank
321
Country Rank
157
University
Ranking Based On Selection:
13
Engineering & Technology / Chemical Engineering
Gas Processing | Process Safety | Hydrogen Economy | Process Design | Process Optimizatio
Gas Processing | Process Safety | Hydrogen Economy | Process Design | Process Optimizatio
H-Index Metrics
-
H-Index29
-
i10 Index48
-
Citation Counts2,574
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* Total H Index Rankings
Rankings
304,222
World Rank
326
Country Rank
160
University
Ranking Based On Selection:
14
Engineering & Technology / Chemical Engineering
Process Design and Optimization | Computer Aided Desig
Process Design and Optimization | Computer Aided Desig
H-Index Metrics
-
H-Index28
-
i10 Index49
-
Citation Counts2,824
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* Total H Index Rankings
Rankings
325,237
World Rank
352
Country Rank
9
University
Ranking Based On Selection:
15
Engineering & Technology / Chemical Engineering
Chemical engineering | Bubble column reactors | Multiphase reactors | Design and simulation of Ejectors
Chemical engineering | Bubble column reactors | Multiphase reactors | Design and simulation of Ejectors
H-Index Metrics
-
H-Index27
-
i10 Index55
-
Citation Counts2,823
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* Total H Index Rankings
Rankings
391,067
World Rank
432
Country Rank
34
University
Ranking Based On Selection:
16
Engineering & Technology / Chemical Engineering
Personalized Medicine | Therapeutics | Smell | Diet | Omic
Personalized Medicine | Therapeutics | Smell | Diet | Omic
H-Index Metrics
-
H-Index24
-
i10 Index31
-
Citation Counts5,333
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* Total H Index Rankings
Rankings
445,781
World Rank
492
Country Rank
233
University
Ranking Based On Selection:
17
Engineering & Technology / Chemical Engineering
Membrane Technology | Nanotechnology | Gas Separation | Advanced Materials | and Petroleum Refiner
Membrane Technology | Nanotechnology | Gas Separation | Advanced Materials | and Petroleum Refiner
H-Index Metrics
-
H-Index22
-
i10 Index36
-
Citation Counts1,617
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* Total H Index Rankings
Rankings
644,546
World Rank
682
Country Rank
315
University
Ranking Based On Selection:
18
Engineering & Technology / Chemical Engineering
Chromatography | Adsorption | Modeling | Optimization | Contro
Chromatography | Adsorption | Modeling | Optimization | Contro
H-Index Metrics
-
H-Index17
-
i10 Index20
-
Citation Counts1,374
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* Total H Index Rankings
Rankings
1,013,091
World Rank
939
Country Rank
51
University
Ranking Based On Selection:
19
Engineering & Technology / Chemical Engineering
chemical engineering | sustainability | nanomaterials | water treatmen
chemical engineering | sustainability | nanomaterials | water treatmen
H-Index Metrics
-
H-Index10
-
i10 Index10
-
Citation Counts646
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* Total H Index Rankings
Rankings
1,018,145
World Rank
944
Country Rank
34
University
Ranking Based On Selection:
20
Engineering & Technology / Chemical Engineering
Molecular simulations | Engineering thermodynamics | Chemical engineering | Confined media | Molecula
Molecular simulations | Engineering thermodynamics | Chemical engineering | Confined media | Molecula
H-Index Metrics
-
H-Index10
-
i10 Index10
-
Citation Counts419
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* Total H Index Rankings
Rankings
1,161,370
World Rank
1,025
Country Rank
192
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
1,502,646
World Rank
1,210
Country Rank
458
University
Ranking Based On Selection:
22
Engineering & Technology / Chemical Engineering
Chemical Engineering | Gas and Process Engineering | Oilfield Chemistry | Conformance Control | Rheolog
Chemical Engineering | Gas and Process Engineering | Oilfield Chemistry | Conformance Control | Rheolog
H-Index Metrics
-
H-Index6
-
i10 Index5
-
Citation Counts102
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Premium Data
* Total H Index Rankings
Rankings
1,666,067
World Rank
1,310
Country Rank
502
University
Ranking Based On Selection:
23
* Total H Index Rankings
Rankings
1,680,364
World Rank
1,322
Country Rank
506
University
Ranking Based On Selection:
24
Engineering & Technology / Chemical Engineering
Chemical Engineering | Process | LCA | Decarbonizatio
Chemical Engineering | Process | LCA | Decarbonizatio
H-Index Metrics
-
H-Index5
-
i10 Index3
-
Citation Counts485
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Premium Data
* Total H Index Rankings
Rankings
2,191,048
World Rank
1,597
Country Rank
613
University
Ranking Based On Selection:
25
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