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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 02, 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 (1.131.752) 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
50,286
World Rank
51
Country Rank
1
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | membrane technology | solid waste managmen
Environmental Engineering | membrane technology | solid waste managmen
H-Index Metrics
-
H-Index63
-
i10 Index188
-
Citation Counts13,561
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* Total H Index Rankings
Rankings
68,949
World Rank
75
Country Rank
7
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
Environmental governance | climate change adaptation | sustainability science | knowledge systems | narrative
Environmental governance | climate change adaptation | sustainability science | knowledge systems | narrative
H-Index Metrics
-
H-Index56
-
i10 Index162
-
Citation Counts25,015
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* Total H Index Rankings
Rankings
93,072
World Rank
114
Country Rank
3
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Energy and Climate Policy | Cities and Climate Change | Cross-border Power Trade | Energy Access | Energy Modelling and Scenari
Energy and Climate Policy | Cities and Climate Change | Cross-border Power Trade | Energy Access | Energy Modelling and Scenari
H-Index Metrics
-
H-Index50
-
i10 Index105
-
Citation Counts13,715
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* Total H Index Rankings
Rankings
97,428
World Rank
119
Country Rank
4
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
Air pollution engineering and management | Short-lived climate pollutant
Air pollution engineering and management | Short-lived climate pollutant
H-Index Metrics
-
H-Index49
-
i10 Index131
-
Citation Counts10,414
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* Total H Index Rankings
Rankings
98,045
World Rank
123
Country Rank
3
University
Ranking Based On Selection:
5
Engineering & Technology / Environmental Science & Engineering
Microbial fuel cells | Photocatalysis | Adsorption | Phytoremediation | Wastewater treatmen
Microbial fuel cells | Photocatalysis | Adsorption | Phytoremediation | Wastewater treatmen
H-Index Metrics
-
H-Index49
-
i10 Index125
-
Citation Counts16,950
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* Total H Index Rankings
Rankings
127,211
World Rank
177
Country Rank
7
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | Wastewater Treatment | Solid Waste Management
Environmental Engineering | Wastewater Treatment | Solid Waste Management
H-Index Metrics
-
H-Index44
-
i10 Index126
-
Citation Counts6,956
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* Total H Index Rankings
Rankings
134,745
World Rank
190
Country Rank
5
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Environmental Technology and Managemen
Environmental Technology and Managemen
H-Index Metrics
-
H-Index43
-
i10 Index147
-
Citation Counts8,732
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* Total H Index Rankings
Rankings
168,719
World Rank
261
Country Rank
13
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
photosynthesis | plant biology | microbiolog
photosynthesis | plant biology | microbiolog
H-Index Metrics
-
H-Index39
-
i10 Index91
-
Citation Counts6,102
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* Total H Index Rankings
Rankings
174,075
World Rank
271
Country Rank
8
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
Construction Engineering and Project Management | Environmental Management | Higher Educatio
Construction Engineering and Project Management | Environmental Management | Higher Educatio
H-Index Metrics
-
H-Index38
-
i10 Index63
-
Citation Counts5,340
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* Total H Index Rankings
Rankings
184,707
World Rank
298
Country Rank
3
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
Environmental Remediation | Environmental Engineering | Risk Management | Environmental Nanotechnology | Nanoscale Zerovalent Iro
Environmental Remediation | Environmental Engineering | Risk Management | Environmental Nanotechnology | Nanoscale Zerovalent Iro
H-Index Metrics
-
H-Index37
-
i10 Index59
-
Citation Counts10,006
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* Total H Index Rankings
Rankings
196,649
World Rank
332
Country Rank
12
University
Ranking Based On Selection:
11
Engineering & Technology / Environmental Science & Engineering
Regenerative Sanitation | Fecal Sludge Treatment | Decentralized Wastewater Treatment Systems | Non-sewered Sanitation | Constructed Wetland
Regenerative Sanitation | Fecal Sludge Treatment | Decentralized Wastewater Treatment Systems | Non-sewered Sanitation | Constructed Wetland
H-Index Metrics
-
H-Index36
-
i10 Index94
-
Citation Counts5,064
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* Total H Index Rankings
Rankings
231,588
World Rank
407
Country Rank
2
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
marine chemistry | atmospheric chemistry | toxicology | risk assessment | tsunam
marine chemistry | atmospheric chemistry | toxicology | risk assessment | tsunam
H-Index Metrics
-
H-Index33
-
i10 Index73
-
Citation Counts3,042
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* Total H Index Rankings
Rankings
260,180
World Rank
482
Country Rank
15
University
Ranking Based On Selection:
13
Engineering & Technology / Environmental Science & Engineering
International development | community development | NGOs | adaptation to climate chang
International development | community development | NGOs | adaptation to climate chang
H-Index Metrics
-
H-Index31
-
i10 Index108
-
Citation Counts5,128
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* Total H Index Rankings
Rankings
273,763
World Rank
507
Country Rank
15
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
AI Signal Processing Image Processing AIoT Artificial Intelligence computer science computer visio
AI Signal Processing Image Processing AIoT Artificial Intelligence computer science computer visio
H-Index Metrics
-
H-Index30
-
i10 Index97
-
Citation Counts2,816
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* Total H Index Rankings
Rankings
275,215
World Rank
509
Country Rank
61
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
Dendroclimatology | Climate change impac
Dendroclimatology | Climate change impac
H-Index Metrics
-
H-Index30
-
i10 Index66
-
Citation Counts3,157
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* Total H Index Rankings
Rankings
315,830
World Rank
618
Country Rank
119
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
329,901
World Rank
662
Country Rank
73
University
Ranking Based On Selection:
17
* Total H Index Rankings
Rankings
348,431
World Rank
718
Country Rank
21
University
Ranking Based On Selection:
18
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | Waste treatment
Environmental Engineering | Waste treatment
H-Index Metrics
-
H-Index26
-
i10 Index50
-
Citation Counts2,094
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* Total H Index Rankings
Rankings
352,858
World Rank
733
Country Rank
81
University
Ranking Based On Selection:
19
Engineering & Technology / Environmental Science & Engineering
Heavy metal bio/phytoremediation | Biodegradation of bioplastics | Environmental Microbiolog
Heavy metal bio/phytoremediation | Biodegradation of bioplastics | Environmental Microbiolog
H-Index Metrics
-
H-Index26
-
i10 Index44
-
Citation Counts2,593
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* Total H Index Rankings
Rankings
371,236
World Rank
791
Country Rank
2
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Environmental Engineering | water microbiolog
Environmental Engineering | water microbiolog
H-Index Metrics
-
H-Index25
-
i10 Index41
-
Citation Counts2,530
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* Total H Index Rankings
Rankings
375,220
World Rank
801
Country Rank
156
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
Wastewater Treatment and Reuse & Waste Managment | Bioga
Wastewater Treatment and Reuse & Waste Managment | Bioga
H-Index Metrics
-
H-Index25
-
i10 Index53
-
Citation Counts2,225
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* Total H Index Rankings
Rankings
401,784
World Rank
897
Country Rank
1
University
Ranking Based On Selection:
22
Engineering & Technology / Environmental Science & Engineering
Nanoscience and Nanotechnology | Materials Science and Engineering | Applied Sciences | Physic
Nanoscience and Nanotechnology | Materials Science and Engineering | Applied Sciences | Physic
H-Index Metrics
-
H-Index24
-
i10 Index31
-
Citation Counts3,447
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* Total H Index Rankings
Rankings
426,836
World Rank
978
Country Rank
191
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Environmrntal management | Industrial waste management | climate chang
Environmrntal management | Industrial waste management | climate chang
H-Index Metrics
-
H-Index23
-
i10 Index45
-
Citation Counts2,365
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* Total H Index Rankings
Rankings
427,042
World Rank
979
Country Rank
57
University
Ranking Based On Selection:
24
Engineering & Technology / Environmental Science & Engineering
crop physiology | rubber | climate smart agriculture | CO2 flu
crop physiology | rubber | climate smart agriculture | CO2 flu
H-Index Metrics
-
H-Index23
-
i10 Index43
-
Citation Counts1,973
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* Total H Index Rankings
Rankings
432,322
World Rank
991
Country Rank
27
University
Ranking Based On Selection:
25
Engineering & Technology / Environmental Science & Engineering
Anaerobic digestion | Anaerobic microbes | Biogas technology | Biological waste treatment and utilization | Bioenerg
Anaerobic digestion | Anaerobic microbes | Biogas technology | Biological waste treatment and utilization | Bioenerg
H-Index Metrics
-
H-Index23
-
i10 Index41
-
Citation Counts1,805
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