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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 Sep 02, 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 (1.122.044) 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
49,503
World Rank
7
Country Rank
6
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
enviornmental science | enviornmental biolog
enviornmental science | enviornmental biolog
H-Index Metrics
-
H-Index62
-
i10 Index328
-
Citation Counts18,922
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* Total H Index Rankings
Rankings
67,717
World Rank
9
Country Rank
7
University
Ranking Based On Selection:
2
Engineering & Technology / Earth Sciences
hydroclimatology | watershed management | climate adaptation & resilienc
hydroclimatology | watershed management | climate adaptation & resilienc
H-Index Metrics
-
H-Index55
-
i10 Index103
-
Citation Counts10,798
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* Total H Index Rankings
Rankings
88,812
World Rank
11
Country Rank
1
University
Ranking Based On Selection:
3
Engineering & Technology / Mechanical Engineering
Polymer tribology | Natural fiber polymer composites | Micro structure characterizatio
Polymer tribology | Natural fiber polymer composites | Micro structure characterizatio
H-Index Metrics
-
H-Index50
-
i10 Index223
-
Citation Counts12,534
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* Total H Index Rankings
Rankings
96,431
World Rank
12
Country Rank
1
University
Ranking Based On Selection:
4
Engineering & Technology / Electrical & Electronic Engineering
Power system | Renewable Energy Integration | Smart Grid | Microgrid | Application of AI Technique
Power system | Renewable Energy Integration | Smart Grid | Microgrid | Application of AI Technique
H-Index Metrics
-
H-Index48
-
i10 Index196
-
Citation Counts9,251
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* Total H Index Rankings
Rankings
119,142
World Rank
17
Country Rank
1
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
128,432
World Rank
19
Country Rank
12
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Advanced Oxidation Processes | Ozone | UV | Electrolysi
Advanced Oxidation Processes | Ozone | UV | Electrolysi
H-Index Metrics
-
H-Index43
-
i10 Index87
-
Citation Counts10,263
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* Total H Index Rankings
Rankings
147,613
World Rank
23
Country Rank
1
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Environmental Health | WaSH | Capacity Building | Public Healt
Environmental Health | WaSH | Capacity Building | Public Healt
H-Index Metrics
-
H-Index40
-
i10 Index104
-
Citation Counts5,422
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* Total H Index Rankings
Rankings
149,282
World Rank
24
Country Rank
13
University
Ranking Based On Selection:
8
* Total H Index Rankings
Rankings
154,878
World Rank
25
Country Rank
1
University
Ranking Based On Selection:
9
Engineering & Technology / Nanoscience and Nanotechnology
Nanomaterials | Metal and Metal oxides NPs | Multi-functional applications | Photocatalysis | Senso
Nanomaterials | Metal and Metal oxides NPs | Multi-functional applications | Photocatalysis | Senso
H-Index Metrics
-
H-Index39
-
i10 Index133
-
Citation Counts5,766
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* Total H Index Rankings
Rankings
157,841
World Rank
29
Country Rank
15
University
Ranking Based On Selection:
10
Engineering & Technology / Earth Sciences
Hydrogeology | engineering geology | modelling | hydrochemistry and isotope hydrolog
Hydrogeology | engineering geology | modelling | hydrochemistry and isotope hydrolog
H-Index Metrics
-
H-Index39
-
i10 Index85
-
Citation Counts5,075
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* Total H Index Rankings
Rankings
164,519
World Rank
35
Country Rank
2
University
Ranking Based On Selection:
11
Engineering & Technology / Earth Sciences
Hydrogeology | Groundwater Chemistry | Environmental Geology | Health Risk Assessment | RS & GI
Hydrogeology | Groundwater Chemistry | Environmental Geology | Health Risk Assessment | RS & GI
H-Index Metrics
-
H-Index38
-
i10 Index76
-
Citation Counts4,334
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* Total H Index Rankings
Rankings
175,517
World Rank
43
Country Rank
21
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
175,538
World Rank
44
Country Rank
22
University
Ranking Based On Selection:
13
Engineering & Technology / Earth Sciences
Geochemistry-Petrology | Paleoclimate-Paleoenvironment | Earth Surface Processes | Geoheritag
Geochemistry-Petrology | Paleoclimate-Paleoenvironment | Earth Surface Processes | Geoheritag
H-Index Metrics
-
H-Index37
-
i10 Index71
-
Citation Counts5,604
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* Total H Index Rankings
Rankings
191,439
World Rank
52
Country Rank
6
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
194,814
World Rank
54
Country Rank
1
University
Ranking Based On Selection:
15
Engineering & Technology / Mechanical Engineering
Computational Fluid Dynamics | Nano fluids | Finite Element Method | Finite Difference Method | Hea
Computational Fluid Dynamics | Nano fluids | Finite Element Method | Finite Difference Method | Hea
H-Index Metrics
-
H-Index35
-
i10 Index77
-
Citation Counts4,014
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* Total H Index Rankings
Rankings
214,890
World Rank
63
Country Rank
28
University
Ranking Based On Selection:
16
Engineering & Technology / Food Science and Engineering
Food Microbiology | Food Safety/Food Securit
Food Microbiology | Food Safety/Food Securit
H-Index Metrics
-
H-Index34
-
i10 Index78
-
Citation Counts3,527
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* Total H Index Rankings
Rankings
230,074
World Rank
73
Country Rank
1
University
Ranking Based On Selection:
17
* Total H Index Rankings
Rankings
245,652
World Rank
84
Country Rank
36
University
Ranking Based On Selection:
18
Engineering & Technology / Food Science and Engineering
land use and land cover dynamics | natural resource management | watershed management | food security | people and protected area
land use and land cover dynamics | natural resource management | watershed management | food security | people and protected area
H-Index Metrics
-
H-Index31
-
i10 Index58
-
Citation Counts4,250
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* Total H Index Rankings
Rankings
246,588
World Rank
85
Country Rank
2
University
Ranking Based On Selection:
19
Engineering & Technology / Chemical Engineering
Ionic Liquids | Separation Process | Process Simulation | Molecular Simulation
Ionic Liquids | Separation Process | Process Simulation | Molecular Simulation
H-Index Metrics
-
H-Index31
-
i10 Index57
-
Citation Counts3,107
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* Total H Index Rankings
Rankings
259,103
World Rank
89
Country Rank
9
University
Ranking Based On Selection:
20
Engineering & Technology / Chemical Engineering
Process Intensification and optimization | Advanced Wastewater Treatment(Advanced oxidation
Process Intensification and optimization | Advanced Wastewater Treatment(Advanced oxidation
H-Index Metrics
-
H-Index30
-
i10 Index69
-
Citation Counts2,781
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* Total H Index Rankings
Rankings
260,457
World Rank
94
Country Rank
1
University
Ranking Based On Selection:
21
Engineering & Technology / Food Science and Engineering
Food Engineering | Post-harvest technology | Dairy technology | Food safet
Food Engineering | Post-harvest technology | Dairy technology | Food safet
H-Index Metrics
-
H-Index30
-
i10 Index82
-
Citation Counts4,011
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* Total H Index Rankings
Rankings
261,167
World Rank
95
Country Rank
39
University
Ranking Based On Selection:
22
Engineering & Technology / Earth Sciences
Hydrology & Water Resources | Climate & Disaster Risk Management | Remote Sensing & GIS | Sustainable Land Management | and Landsca
Hydrology & Water Resources | Climate & Disaster Risk Management | Remote Sensing & GIS | Sustainable Land Management | and Landsca
H-Index Metrics
-
H-Index30
-
i10 Index43
-
Citation Counts3,190
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* Total H Index Rankings
Rankings
291,193
World Rank
109
Country Rank
2
University
Ranking Based On Selection:
23
Engineering & Technology / Civil Engineering
Concrete technology | Rehabilitation of buildings | Risk Analysis in construction project
Concrete technology | Rehabilitation of buildings | Risk Analysis in construction project
H-Index Metrics
-
H-Index28
-
i10 Index54
-
Citation Counts2,677
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* Total H Index Rankings
Rankings
309,763
World Rank
124
Country Rank
15
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
310,763
World Rank
128
Country Rank
7
University
Ranking Based On Selection:
25
Engineering & Technology / Earth Sciences
Hydrological modeling | Water Resources Management | climate change | Drought | Land use land cove
Hydrological modeling | Water Resources Management | climate change | Drought | Land use land cove
H-Index Metrics
-
H-Index27
-
i10 Index39
-
Citation Counts2,115
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