The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 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 6 years. As of Jan 30, 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 (873.690) 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 IndexRankings
Ranking Based On Selection: 1
Materials Science
Electrochemistry
Batteries
Energy Storage
Nanotechnology
Metrics
H-Index
i10 Index
Citation Counts
162
634
86,302
* Total H IndexRankings
Ranking Based On Selection: 2
Geographic Information Systems
Geographic Information Science
Geoinformatics
Spatial Data Mining
Natural Hazards
Metrics
H-Index
i10 Index
Citation Counts
140
715
78,735
* Total H IndexRankings
Ranking Based On Selection: 3
multimedia
computer vision
machine learning
Metrics
H-Index
i10 Index
Citation Counts
135
492
78,288
* Total H IndexRankings
Ranking Based On Selection: 4
Advanced biological waste treatment processes
membrane technologies
alternative water resources
resource recovery
environmen
Metrics
H-Index
i10 Index
Citation Counts
118
663
60,350
* Total H IndexRankings
Ranking Based On Selection: 5
Water-Food-Energy Nexus
Membrane separation
Anaerobic digestion
Resource Recovery from Wastewater
Metrics
H-Index
i10 Index
Citation Counts
114
428
43,430
* Total H IndexRankings
Ranking Based On Selection: 6
Data Analytics
Engineering Optimization
Evolutionary Computation
Smart Cities
Metrics
H-Index
i10 Index
Citation Counts
109
430
61,294
* Total H IndexRankings
Ranking Based On Selection: 7
Green Technology
Resource & Energy Recovery
Water-Waste-Energy Nexus
Membrane Technology
Solid Waste Management
Metrics
H-Index
i10 Index
Citation Counts
106
428
46,311
* Total H IndexRankings
Ranking Based On Selection: 8
Techno-Economic Analysis
Life-Cycle Cost
Cost-Benefit Analysis
Circular Economy
Energy & Fuels
Metrics
H-Index
i10 Index
Citation Counts
105
355
42,221
* Total H IndexRankings
Ranking Based On Selection: 9
Power
organizations
etc
Metrics
H-Index
i10 Index
Citation Counts
104
466
56,709
* Total H IndexRankings
Ranking Based On Selection: 10
Energy and Fuel
Waste Management
Circular Economy
Sustainable Energy
Metrics
H-Index
i10 Index
Citation Counts
102
274
34,588
* Total H IndexRankings
Ranking Based On Selection: 11
Metrics
H-Index
i10 Index
Citation Counts
101
511
41,161
* Total H IndexRankings
Ranking Based On Selection: 12
statistical science
environment
clinical trials
health
Metrics
H-Index
i10 Index
Citation Counts
101
291
34,588
* Total H IndexRankings
Ranking Based On Selection: 13
Sport and Exercise Science
Metrics
H-Index
i10 Index
Citation Counts
100
252
41,951
* Total H IndexRankings
Ranking Based On Selection: 14
Remote Sensing
Ecological Resilience
Phenology
Drought
Aerobiology
Metrics
H-Index
i10 Index
Citation Counts
100
313
75,942
* Total H IndexRankings
Ranking Based On Selection: 15
Computational intelligence
machine learning
fuzzy neural networks (FNN)
cognitive neuro-engineering
brain-computer interface
Metrics
H-Index
i10 Index
Citation Counts
97
472
40,974
* Total H IndexRankings
Ranking Based On Selection: 16
Environmental Technology
Greenhouse Gas Emissions
Wastewater Treatment
Microplastics
Metrics
H-Index
i10 Index
Citation Counts
96
441
32,454
* Total H IndexRankings
Ranking Based On Selection: 17
Desalination
Water Reuse
Membrane Technology
Resource Recovery
Circular Economy
Metrics
H-Index
i10 Index
Citation Counts
91
432
30,183
* Total H IndexRankings
Ranking Based On Selection: 18
Medicine
Palliative Medicine
Breathlessness
Metrics
H-Index
i10 Index
Citation Counts
91
530
42,176
* Total H IndexRankings
Ranking Based On Selection: 19
Sport Science
Sport Medicine
Clinimetrics
Research Methods
Metrics
H-Index
i10 Index
Citation Counts
87
184
32,844
* Total H IndexRankings
Ranking Based On Selection: 20
Water treatment
Wastewater treatment
membrane technology
filtration
desalination
Metrics
H-Index
i10 Index
Citation Counts
87
393
27,270
* Total H IndexRankings
Ranking Based On Selection: 21
public health
primary health care
complementary health care
chronic disease
ageing
Metrics
H-Index
i10 Index
Citation Counts
87
474
31,231
* Total H IndexRankings
Ranking Based On Selection: 22
Computational Intelligence
Fuzzy Transfer Learning
Concept drift
Decision support systems
Metrics
H-Index
i10 Index
Citation Counts
86
352
27,804
* Total H IndexRankings
Ranking Based On Selection: 23
Plant ecophysiology. terrestrial ecohydrology
plant physiology
Metrics
H-Index
i10 Index
Citation Counts
86
249
28,593
* Total H IndexRankings
Ranking Based On Selection: 24
Network Science
Security and Privacy
Big Data
Mathematical AI
Metrics
H-Index
i10 Index
Citation Counts
82
395
26,126
* Total H IndexRankings
Ranking Based On Selection: 25
Psycho-oncology
Cancer care
Metrics
H-Index
i10 Index
Citation Counts
80
284
22,174
Wang Guoxiu
Metrics
H-Index
i10-Index
Citation Counts
162
634
86,302
Materials Science
Electrochemistry
Batteries
Energy Storage
Nanotechnology
Biswajeet Pradhan
Metrics
H-Index
i10-Index
Citation Counts
140
715
78,735
Geographic Information Systems
Geographic Information Science
Geoinformatics
Spatial Data Mining
Natural Hazards
Yi Yang
Metrics
H-Index
i10-Index
Citation Counts
135
492
78,288
multimedia
computer vision
machine learning
Huu Hao Ngo
Metrics
H-Index
i10-Index
Citation Counts
118
663
60,350
Advanced biological waste treatment processes
membrane technologies
alternative water resources
resource recovery
environmen
Long Nghiem
Metrics
H-Index
i10-Index
Citation Counts
114
428
43,430
Water-Food-Energy Nexus
Membrane separation
Anaerobic digestion
Resource Recovery from Wastewater
Amir H Gandomi
Metrics
H-Index
i10-Index
Citation Counts
109
430
61,294
Data Analytics
Engineering Optimization
Evolutionary Computation
Smart Cities
Wenshan Guo
Metrics
H-Index
i10-Index
Citation Counts
106
428
46,311
Green Technology
Resource & Energy Recovery
Water-Waste-Energy Nexus
Membrane Technology
Solid Waste Management
TM Indra Mahlia
Metrics
H-Index
i10-Index
Citation Counts
105
355
42,221
Techno-Economic Analysis
Life-Cycle Cost
Cost-Benefit Analysis
Circular Economy
Energy & Fuels
Stewart Clegg
Metrics
H-Index
i10-Index
Citation Counts
104
466
56,709
Power
organizations
etc
Hwai Chyuan Ong|HC Ong
Metrics
H-Index
i10-Index
Citation Counts
102
274
34,588
Energy and Fuel
Waste Management
Circular Economy
Sustainable Energy
Debra Jackson
Metrics
H-Index
i10-Index
Citation Counts
101
511
41,161
Louise Ryan
Metrics
H-Index
i10-Index
Citation Counts
101
291
34,588
Aaron Coutts
Metrics
H-Index
i10-Index
Citation Counts
100
252
41,951
Sport and Exercise Science
Alfredo Huete
Metrics
H-Index
i10-Index
Citation Counts
100
313
75,942
Remote Sensing
Ecological Resilience
Phenology
Drought
Aerobiology
Chin Teng Lin
Metrics
H-Index
i10-Index
Citation Counts
97
472
40,974
Computational intelligence
machine learning
fuzzy neural networks (FNN)
cognitive neuro-engineering
brain-computer interface
Bing Jie Ni
Metrics
H-Index
i10-Index
Citation Counts
96
441
32,454
Environmental Technology
Greenhouse Gas Emissions
Wastewater Treatment
Microplastics
Ho Kyong Shon
Metrics
H-Index
i10-Index
Citation Counts
91
432
30,183
Desalination
Water Reuse
Membrane Technology
Resource Recovery
Circular Economy
David Christopher Currow
Metrics
H-Index
i10-Index
Citation Counts
91
530
42,176
Franco M Impellizzeri
Metrics
H-Index
i10-Index
Citation Counts
87
184
32,844
Sport Science
Sport Medicine
Clinimetrics
Research Methods
Saravanamuthu Vigneswaran
Metrics
H-Index
i10-Index
Citation Counts
87
393
27,270
Water treatment
Wastewater treatment
membrane technology
filtration
desalination
Jon Adams
Metrics
H-Index
i10-Index
Citation Counts
87
474
31,231
public health
primary health care
complementary health care
chronic disease
ageing
Jie Lu
Metrics
H-Index
i10-Index
Citation Counts
86
352
27,804
Computational Intelligence
Fuzzy Transfer Learning
Concept drift
Decision support systems
Derek Eamus
Metrics
H-Index
i10-Index
Citation Counts
86
249
28,593
Plant ecophysiology. terrestrial ecohydrology
plant physiology
Shui Yu
Metrics
H-Index
i10-Index
Citation Counts
82
395
26,126
Network Science
Security and Privacy
Big Data
Mathematical AI
Suzanne Chambers
Metrics
H-Index
i10-Index
Citation Counts
80
284
22,174