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University, Subject, Country, Region, World
California Institute of Technology Caltech 1.278 Scientists Subject Rankings
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 Sep 02, 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 (1.122.044) 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 Index Rankings
Rankings
196
World Rank
88
Country Rank
1
University
Ranking Based On Selection:
1
* Total H Index Rankings
Rankings
211
World Rank
92
Country Rank
2
University
Ranking Based On Selection:
2
* Total H Index Rankings
Rankings
701
World Rank
250
Country Rank
3
University
Ranking Based On Selection:
3
* Total H Index Rankings
Rankings
731
World Rank
270
Country Rank
4
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
861
World Rank
329
Country Rank
5
University
Ranking Based On Selection:
5
Natural Sciences / Physics
sensor networks | particle physics | high performance computing | machine learning | seismic network
sensor networks | particle physics | high performance computing | machine learning | seismic network
H-Index Metrics
-
H-Index188
-
i10 Index556
-
Citation Counts183,550
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* Total H Index Rankings
Rankings
1,320
World Rank
533
Country Rank
6
University
Ranking Based On Selection:
6
Engineering & Technology / Electrical & Electronic Engineering
Photoacoustic tomography | compressed ultrafast photography | time-reversal optics | ultrasound-modulated optical tomograph
Photoacoustic tomography | compressed ultrafast photography | time-reversal optics | ultrasound-modulated optical tomograph
H-Index Metrics
-
H-Index166
-
i10 Index699
-
Citation Counts118,075
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* Total H Index Rankings
Rankings
1,819
World Rank
766
Country Rank
7
University
Ranking Based On Selection:
7
Engineering & Technology / Chemical Engineering
biocatalysis | enzyme technology | protein engineering | synthetic biology | directed evolutio
biocatalysis | enzyme technology | protein engineering | synthetic biology | directed evolutio
H-Index Metrics
-
H-Index153
-
i10 Index442
-
Citation Counts80,894
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* Total H Index Rankings
Rankings
1,889
World Rank
804
Country Rank
8
University
Ranking Based On Selection:
8
* Total H Index Rankings
Rankings
2,203
World Rank
947
Country Rank
9
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
2,325
World Rank
1,011
Country Rank
10
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
2,404
World Rank
1,057
Country Rank
11
University
Ranking Based On Selection:
11
Natural Sciences / Mathematical Sciences
Algebraic geometry | mathematical physics | noncommutative geometry | low-dimensional topology
Algebraic geometry | mathematical physics | noncommutative geometry | low-dimensional topology
H-Index Metrics
-
H-Index143
-
i10 Index530
-
Citation Counts81,362
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* Total H Index Rankings
Rankings
2,511
World Rank
1,101
Country Rank
12
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
2,571
World Rank
1,132
Country Rank
13
University
Ranking Based On Selection:
13
Natural Sciences / Physics
Physics | Astrophysics | Gravity | Precision Measurement | Machine Learnin
Physics | Astrophysics | Gravity | Precision Measurement | Machine Learnin
H-Index Metrics
-
H-Index143
-
i10 Index335
-
Citation Counts134,358
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* Total H Index Rankings
Rankings
2,575
World Rank
1,134
Country Rank
14
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
2,698
World Rank
1,204
Country Rank
15
University
Ranking Based On Selection:
15
Natural Sciences / Molecular Biology & Genetics
Arabidopsis | developmental biology | genetics | plant molecular biology | genomic
Arabidopsis | developmental biology | genetics | plant molecular biology | genomic
H-Index Metrics
-
H-Index140
-
i10 Index281
-
Citation Counts98,089
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* Total H Index Rankings
Rankings
3,037
World Rank
1,351
Country Rank
16
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
environmental chemistry | atmospheric chemistry | environmental engineerin
environmental chemistry | atmospheric chemistry | environmental engineerin
H-Index Metrics
-
H-Index136
-
i10 Index436
-
Citation Counts86,246
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* Total H Index Rankings
Rankings
3,691
World Rank
1,658
Country Rank
17
University
Ranking Based On Selection:
17
Natural Sciences / Physics
Theoretical Astrophysics | Astronomy | and Cosmology (Galaxy | Star | and Planet Formation
Theoretical Astrophysics | Astronomy | and Cosmology (Galaxy | Star | and Planet Formation
H-Index Metrics
-
H-Index129
-
i10 Index377
-
Citation Counts62,225
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* Total H Index Rankings
Rankings
3,855
World Rank
1,744
Country Rank
18
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
3,896
World Rank
1,768
Country Rank
19
University
Ranking Based On Selection:
19
* Total H Index Rankings
Rankings
4,436
World Rank
2,018
Country Rank
20
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
4,980
World Rank
2,268
Country Rank
21
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
5,059
World Rank
2,302
Country Rank
22
University
Ranking Based On Selection:
22
Engineering & Technology / Meteorology & Atmospheric Sciences
Atmospheric science | physical chemistry | geochemistry | carbon cycl
Atmospheric science | physical chemistry | geochemistry | carbon cycl
H-Index Metrics
-
H-Index119
-
i10 Index354
-
Citation Counts48,902
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* Total H Index Rankings
Rankings
5,280
World Rank
2,398
Country Rank
23
University
Ranking Based On Selection:
23
Natural Sciences / Physics
Gravitational Wave Astronomy | Lasers | Brownian Noise | Mechanical System
Gravitational Wave Astronomy | Lasers | Brownian Noise | Mechanical System
H-Index Metrics
-
H-Index118
-
i10 Index202
-
Citation Counts100,748
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* Total H Index Rankings
Rankings
5,587
World Rank
2,542
Country Rank
24
University
Ranking Based On Selection:
24
* Total H Index Rankings
Rankings
5,664
World Rank
2,571
Country Rank
25
University
Ranking Based On Selection:
25
Natural Sciences / Physics
Microcavities | Microresonators | Nonlinear Optics | Optical Physics | Photonic
Microcavities | Microresonators | Nonlinear Optics | Optical Physics | Photonic
H-Index Metrics
-
H-Index116
-
i10 Index339
-
Citation Counts66,537
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