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].
Rankings
Renewable Energy | Thermal Energy | Nanofluid | Biofuel | Energy Managemen
H-Index Metrics
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H-Index43
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i10 Index60
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Citation Counts7,898
Rankings
Multi-energy system modelling | Renewable energy | Thermal management | Heat recover
H-Index Metrics
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H-Index40
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i10 Index76
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Citation Counts5,256
Rankings
Renewable energy | Sustainable Energy Storage Systems | Biorefinery | Bioremediation | Waste-to-energ
H-Index Metrics
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H-Index36
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i10 Index72
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Citation Counts4,020
Rankings
Postharvest Process Engineering | Renewable Energy | Energy Efficiency & GHG Emission Mode
H-Index Metrics
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H-Index26
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i10 Index45
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Citation Counts2,142
Rankings
Renewable Energy | Circular Bioeconomy | Precision agriculture | PHL technology | Agricultural Machiner
H-Index Metrics
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H-Index25
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i10 Index56
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Citation Counts1,954
Rankings
Forestry | Environmental Science | Energy management | REDD+ | Carbon sequestratio
H-Index Metrics
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H-Index24
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i10 Index46
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Citation Counts2,048
Rankings
Energy Policy | Energy Regulation | Renewable Energy | Energy Efficienc
H-Index Metrics
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H-Index20
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i10 Index30
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Citation Counts1,278
Rankings
Renewable Energy | Perovskite solar cells | Advanced material Science | Thin film deposition and characterizatio
H-Index Metrics
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H-Index19
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i10 Index31
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Citation Counts1,387
Rankings
Autonomous vehicle | Renewable Energy | IC Engine | Electric vehicl
H-Index Metrics
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H-Index18
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i10 Index19
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Citation Counts2,157
Rankings
Renewable Energy | Sustainable Aviation Fuel | Green Hydrogen | Biomas
H-Index Metrics
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H-Index18
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i10 Index24
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Citation Counts1,923
Rankings
Rankings
CFD | Renewable Energy Technologies | Engineering Education | OB
H-Index Metrics
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H-Index17
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i10 Index30
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Citation Counts2,397
Rankings
Photothermal Conversion | CNTs | Graphene | Plasmonic Nanoparticle
H-Index Metrics
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H-Index16
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i10 Index24
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Citation Counts1,250
Rankings
Renewable Energy | Material Science | Condensed Matter Physic
H-Index Metrics
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H-Index16
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i10 Index17
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Citation Counts886
Rankings
Electrochemical Energy Systems | Fuel Cells | Renewable Energy | Energy Materials | Thin film
H-Index Metrics
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H-Index15
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i10 Index21
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Citation Counts1,476
Rankings
Renewable Energy | Photovoltaic Energy | Hybrid Energy System
H-Index Metrics
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H-Index14
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i10 Index23
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Citation Counts595
Rankings
Energy Poverty | Sharing Economy | Renewable Energy | Social Entrepreneurshi
H-Index Metrics
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H-Index13
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i10 Index18
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Citation Counts957
Rankings
Renewable Energy Technology | Nano Materials | Energy Storage Materials | Fuel Cell & Flow Batterie
H-Index Metrics
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H-Index13
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i10 Index13
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Citation Counts1,327
Rankings
Rankings
Emission inventory | Solid waste management | Environmental pollution | Renewable energy | LC
H-Index Metrics
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H-Index13
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i10 Index15
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Citation Counts462
Rankings
Rankings
Rankings
Renewable Energy | Energy Efficiency | Material Science | Electronics | Fue
H-Index Metrics
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H-Index12
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i10 Index15
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Citation Counts490
Rankings
Environmental Sciences | Renewable Energy | Bioenergy | Waste Management | Waste to Valuable Product
H-Index Metrics
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H-Index10
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i10 Index12
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Citation Counts480
Rankings
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