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 05, 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 (0) 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
Rankings
Water Treatment | (Bio)adsorption | Microalgae | Resource recovery | Biocha
H-Index Metrics
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H-Index104
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i10 Index285
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Citation Counts42,682
Rankings
Rankings
Smart Grids | Power System Operation and Planning | Electricity Markets | Renewable Energie
H-Index Metrics
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H-Index75
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i10 Index217
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Citation Counts16,764
Rankings
Innovation ecosystems | Coopetition | Business models | Digital strategy | Sustainable busines
H-Index Metrics
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H-Index74
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i10 Index154
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Citation Counts22,510
Rankings
Environmental Biotechnology | Enzymes | Water and Wastewater Treatment | Bioreactors | Bioprocesse
H-Index Metrics
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H-Index64
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i10 Index147
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Citation Counts14,988
Rankings
Electrical machines and drives | Power electronic
H-Index Metrics
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H-Index60
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i10 Index284
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Citation Counts16,837
Rankings
Rankings
metal recovery | secondary resources | electrochemistry | hydrometallurgy | ion-exchang
H-Index Metrics
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H-Index56
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i10 Index102
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Citation Counts10,071
Rankings
innovation | entrepreneurship | sustainability | international busines
H-Index Metrics
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H-Index51
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i10 Index94
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Citation Counts12,656
Rankings
Rankings
knowledge management | intellectual capital | innovation | creativit
H-Index Metrics
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H-Index47
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i10 Index86
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Citation Counts11,762
Rankings
Theoretical Physics | Spectroscopy | Materials Science | Scientific computin
H-Index Metrics
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H-Index46
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i10 Index168
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Citation Counts8,582
Rankings
Rankings
International Marketing | International Entrepreneurship | International Business | Born Globals | International New Venture
H-Index Metrics
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H-Index44
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i10 Index65
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Citation Counts9,143
Rankings
Rankings
software engineering | information systems | enterprise systems | #LUTsoftwar
H-Index Metrics
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H-Index43
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i10 Index109
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Citation Counts9,846
Rankings
Rankings
Energy systems modelling | Renewable Energy | Energy Transition | Sustainabilit
H-Index Metrics
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H-Index42
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i10 Index61
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Citation Counts8,247
Rankings
Performance management | Operations management | Digital services | Innovation | Sustainabilit
H-Index Metrics
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H-Index40
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i10 Index91
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Citation Counts7,715
Rankings
Environmental technology | waste management | energ
H-Index Metrics
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H-Index40
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i10 Index78
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Citation Counts4,712
Rankings
Trust | Knowledge | Collaborative innovation | New forms of organizing | Digital platform
H-Index Metrics
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H-Index40
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i10 Index66
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Citation Counts9,014
Rankings
Rankings
Empirical Software Engineering | Software Quality | Software Maintenance | Technical Deb
H-Index Metrics
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H-Index39
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i10 Index82
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Citation Counts5,768
Rankings
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