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
Energy Studies
Solar Thermal
Photovoltaics
Renewable Energy
Metrics
H-Index
i10 Index
Citation Counts
121
736
59,282
* Total H IndexRankings
Ranking Based On Selection: 2
Renewable Energy
Power Electronics
Drives
Electrical Engineering
Metrics
H-Index
i10 Index
Citation Counts
107
472
44,935
* Total H IndexRankings
Ranking Based On Selection: 3
Energy Finance
Green Finance
Climate Change
Equity Market
Sustainable Development
Metrics
H-Index
i10 Index
Citation Counts
74
159
19,663
* Total H IndexRankings
Ranking Based On Selection: 4
Energy Engineering
Renewable Energy
Energy Policy
Smart Transport
Electric Vehicle
Metrics
H-Index
i10 Index
Citation Counts
55
135
12,360
* Total H IndexRankings
Ranking Based On Selection: 5
solar energy
Metrics
H-Index
i10 Index
Citation Counts
44
101
9,750
* Total H IndexRankings
Ranking Based On Selection: 6
Renewable energy
Metrics
H-Index
i10 Index
Citation Counts
43
89
8,846
* Total H IndexRankings
Ranking Based On Selection: 7
Renewable Energy
Metrics
H-Index
i10 Index
Citation Counts
42
113
8,399
* Total H IndexRankings
Ranking Based On Selection: 8
Energy
Thermo-fluids
Mechanical Engineering
Metrics
H-Index
i10 Index
Citation Counts
41
144
6,863
* Total H IndexRankings
Ranking Based On Selection: 9
bio-fuel
microwave reactions
green chemistry
bio-materials
Metrics
H-Index
i10 Index
Citation Counts
39
85
7,245
* Total H IndexRankings
Ranking Based On Selection: 10
Deregulated Power System
Transmission pricing
Energy Efficiency
Renewable Energy
Metrics
H-Index
i10 Index
Citation Counts
38
95
6,756
* Total H IndexRankings
Ranking Based On Selection: 11
Green engineering
Biofuels
Bioenergy
Metrics
H-Index
i10 Index
Citation Counts
38
60
7,589
* Total H IndexRankings
Ranking Based On Selection: 12
Energy Recovery
Engine Boosting & Internal Combustion Engines
Metrics
H-Index
i10 Index
Citation Counts
35
79
4,808
* Total H IndexRankings
Ranking Based On Selection: 13
Power System
Dynamic Stability
AI
Power Quality
Metrics
H-Index
i10 Index
Citation Counts
34
89
3,811
* Total H IndexRankings
Ranking Based On Selection: 14
Water and Wastewater Treatment
Renewable Energy
Metrics
H-Index
i10 Index
Citation Counts
33
72
4,120
* Total H IndexRankings
Ranking Based On Selection: 15
Solar Energy
Biofuels
Renewable Energy
Energy Efficiency and Policy
Materials.
Metrics
H-Index
i10 Index
Citation Counts
32
63
8,321
* Total H IndexRankings
Ranking Based On Selection: 16
Power system protection
Protective Relay
Artificial/Computational intelligence
Data mining
Efficient Energy Management
Metrics
H-Index
i10 Index
Citation Counts
32
75
2,925
* Total H IndexRankings
Ranking Based On Selection: 17
solar cell
materials
semiconductor
devices
nanotechnology
Metrics
H-Index
i10 Index
Citation Counts
31
112
3,887
* Total H IndexRankings
Ranking Based On Selection: 18
Solar cell material
Concentrating Solar Power
Nano-materials
Environmental science
Metrics
H-Index
i10 Index
Citation Counts
30
62
3,083
* Total H IndexRankings
Ranking Based On Selection: 19
Power System Analysis
System Security
Voltage Stability
Metrics
H-Index
i10 Index
Citation Counts
30
43
4,895
* Total H IndexRankings
Ranking Based On Selection: 20
energy
wastewater treatment
anaerobic digestion
adsorbtion/coagulation
environmental technology
Metrics
H-Index
i10 Index
Citation Counts
29
46
2,598
* Total H IndexRankings
Ranking Based On Selection: 21
Renewable energy
thermal management
Li-ion battery
electric vehicle
Metrics
H-Index
i10 Index
Citation Counts
29
65
5,185
* Total H IndexRankings
Ranking Based On Selection: 22
Membranes
polymers
nanomaterials
CO2 capture
water treatment
Metrics
H-Index
i10 Index
Citation Counts
29
36
2,797
* Total H IndexRankings
Ranking Based On Selection: 23
Applied Energy
Hybrid energy & Environment
Clean fuel
Refrigeration and Air conditioning
Waste to wealth machines
Metrics
H-Index
i10 Index
Citation Counts
29
44
3,690
* Total H IndexRankings
Ranking Based On Selection: 24
Renewable Energy
Biomass
Waste-to-Energy
Energy Conversion System
Metrics
H-Index
i10 Index
Citation Counts
28
59
4,059
* Total H IndexRankings
Ranking Based On Selection: 25
Power Electronic
Renewable Energy
Metrics
H-Index
i10 Index
Citation Counts
28
58
3,352
Kamaruzzaman Sopian
Metrics
H-Index
i10-Index
Citation Counts
121
736
59,282
Energy Studies
Solar Thermal
Photovoltaics
Renewable Energy
Nasrudin Abd Rahim
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
107
472
44,935
Renewable Energy
Power Electronics
Drives
Electrical Engineering
Arshian Sharif
Sunway University
Selangor, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
74
159
19,663
Energy Finance
Green Finance
Climate Change
Equity Market
Sustainable Development
M Hasanuzzaman
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
55
135
12,360
Energy Engineering
Renewable Energy
Energy Policy
Smart Transport
Electric Vehicle
M Yusof Sulaiman
Metrics
H-Index
i10-Index
Citation Counts
44
101
9,750
Zainal Alimuddin
Universiti Sains Malaysia
Penang, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
43
89
8,846
Hashim Hizam
Universiti Putra Malaysia
Seri Kembangan, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
42
113
8,399
Shaharin A Sulaiman
Metrics
H-Index
i10-Index
Citation Counts
41
144
6,863
Energy
Thermo-fluids
Mechanical Engineering
Saifuddin Nomanbhay
Universiti Tenaga Nasional
Kajang, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
39
85
7,245
bio-fuel
microwave reactions
green chemistry
bio-materials
Mohammad Yusri Hassan
Metrics
H-Index
i10-Index
Citation Counts
38
95
6,756
Deregulated Power System
Transmission pricing
Energy Efficiency
Renewable Energy
Ravindra Pogaku
Universiti Malaysia Sabah
Kota Kinabalu, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
38
60
7,589
Green engineering
Biofuels
Bioenergy
Srithar Rajoo
Metrics
H-Index
i10-Index
Citation Counts
35
79
4,808
Energy Recovery
Engine Boosting & Internal Combustion Engines
Noor Izzri Abdul Wahab
Universiti Putra Malaysia
Seri Kembangan, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
34
89
3,811
Power System
Dynamic Stability
AI
Power Quality
Yeek-Chia Ho
Metrics
H-Index
i10-Index
Citation Counts
33
72
4,120
Water and Wastewater Treatment
Renewable Energy
Fayaz Hussain Katper
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
32
63
8,321
Solar Energy
Biofuels
Renewable Energy
Energy Efficiency and Policy
Materials.
Mohammad Lutfi Othman
Universiti Putra Malaysia
Seri Kembangan, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
32
75
2,925
Power system protection
Protective Relay
Artificial/Computational intelligence
Data mining
Efficient Energy Management
Kamarulazizi Ibrahim
Universiti Sains Malaysia
Penang, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
31
112
3,887
solar cell
materials
semiconductor
devices
nanotechnology
Kok Keong Chong
Metrics
H-Index
i10-Index
Citation Counts
30
62
3,083
Solar cell material
Concentrating Solar Power
Nano-materials
Environmental science
GB Jasmon
University of Malaya
Kuala Lumpur, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
30
43
4,895
Power System Analysis
System Security
Voltage Stability
Mohd Nasrullah
Universiti Malaysia Pahang
Pahang, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
29
46
2,598
energy
wastewater treatment
anaerobic digestion
adsorbtion/coagulation
environmental technology
Bernard Saw Lh
Metrics
H-Index
i10-Index
Citation Counts
29
65
5,185
Renewable energy
thermal management
Li-ion battery
electric vehicle
Wai Fen Yong
Metrics
H-Index
i10-Index
Citation Counts
29
36
2,797
Membranes
polymers
nanomaterials
CO2 capture
water treatment
Mohammad Omar Abdullah
Universiti Malaysia Sarawak
Sawarak, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
29
44
3,690
Applied Energy
Hybrid energy & Environment
Clean fuel
Refrigeration and Air conditioning
Waste to wealth machines
ABD HALIM SHAMSUDDIN
Universiti Tenaga Nasional
Kajang, Malaysia
Metrics
H-Index
i10-Index
Citation Counts
28
59
4,059
Renewable Energy
Biomass
Waste-to-Energy
Energy Conversion System
Ir Muhammad Irwanto
Metrics
H-Index
i10-Index
Citation Counts
28
58
3,352
Power Electronic
Renewable Energy