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
Geochemistry
Cosmochemistry
Petrology
Geophysics
Planetary Science
Metrics
H-Index
i10 Index
Citation Counts
69
198
14,368
* Total H IndexRankings
Ranking Based On Selection: 2
High pressure
Mineral physics
Planetary science
High-pressure mineral physics
Metrics
H-Index
i10 Index
Citation Counts
38
69
3,594
* Total H IndexRankings
Ranking Based On Selection: 3
Earth science
Planetary science
Metrics
H-Index
i10 Index
Citation Counts
36
61
4,386
* Total H IndexRankings
Ranking Based On Selection: 4
geochemistry
Metrics
H-Index
i10 Index
Citation Counts
33
51
4,622
* Total H IndexRankings
Ranking Based On Selection: 5
Planetary Science
Mineralogy
Astrobiology
Metrics
H-Index
i10 Index
Citation Counts
27
54
2,887
* Total H IndexRankings
Ranking Based On Selection: 6
Geotechnical Engineering
Metrics
H-Index
i10 Index
Citation Counts
15
24
918
* Total H IndexRankings
Ranking Based On Selection: 7
Geology
Tectonics
Geochronology
Metrics
H-Index
i10 Index
Citation Counts
14
18
793
* Total H IndexRankings
Ranking Based On Selection: 8
Astrobiology
Geochemistry
Petrology
Metrics
H-Index
i10 Index
Citation Counts
3
2
155
* Total H IndexRankings
Ranking Based On Selection: 9
Bayesian Modeling
Machine Learning
Risk and Reliability
Metrics
H-Index
i10 Index
Citation Counts
1
1
32
* Total H IndexRankings
Ranking Based On Selection: 10
Geochemistry
Isotopes
Petrology
Geology
Metrics
H-Index
i10 Index
Citation Counts
1
1
17
Eizo Nakamura
Okayama University
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
69
198
14,368
Geochemistry
Cosmochemistry
Petrology
Geophysics
Planetary Science
Hidenori Terasaki
Okayama University
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
38
69
3,594
High pressure
Mineral physics
Planetary science
High-pressure mineral physics
Katsura Kobayashi
Okayama University
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
36
61
4,386
Earth science
Planetary science
Hitoshi Chiba
Okayama University
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
33
51
4,622
Matthew Izawa
Okayama University
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
27
54
2,887
Planetary Science
Mineralogy
Astrobiology
Shin Ichi Nishimura
Okayama University
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
15
24
918
Takeshi Imayama
Okayama University of Science
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
14
18
793
Geology
Tectonics
Geochronology
Dilan M Ratnayake
Okayama University
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
3
2
155
Astrobiology
Geochemistry
Petrology
Bayesian Modeling
Machine Learning
Risk and Reliability
Geochemistry
Isotopes
Petrology
Geology