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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 Jan 03, 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].
* Total H Index Rankings
Rankings
186
World Rank
80
Country Rank
1
University
Ranking Based On Selection:
1
* Total H Index Rankings
Rankings
205
World Rank
88
Country Rank
2
University
Ranking Based On Selection:
2
* Total H Index Rankings
Rankings
660
World Rank
220
Country Rank
3
University
Ranking Based On Selection:
3
* Total H Index Rankings
Rankings
715
World Rank
246
Country Rank
4
University
Ranking Based On Selection:
4
* Total H Index Rankings
Rankings
811
World Rank
295
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-Index195
-
i10 Index560
-
Citation Counts193,785
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* Total H Index Rankings
Rankings
1,391
World Rank
552
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-Index167
-
i10 Index711
-
Citation Counts121,132
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* Total H Index Rankings
Rankings
1,818
World Rank
747
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-Index156
-
i10 Index450
-
Citation Counts83,588
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Premium Data
* Total H Index Rankings
Rankings
1,994
World Rank
830
Country Rank
8
University
Ranking Based On Selection:
8
* Total H Index Rankings
Rankings
1,998
World Rank
831
Country Rank
9
University
Ranking Based On Selection:
9
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-Index152
-
i10 Index540
-
Citation Counts89,322
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Premium Data
* Total H Index Rankings
Rankings
2,174
World Rank
910
Country Rank
10
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
2,191
World Rank
915
Country Rank
11
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
2,521
World Rank
1,074
Country Rank
12
University
Ranking Based On Selection:
12
Natural Sciences / Physics
Physics | Astrophysics | Gravity | Precision Measurement | Machine Learnin
Physics | Astrophysics | Gravity | Precision Measurement | Machine Learnin
H-Index Metrics
-
H-Index144
-
i10 Index346
-
Citation Counts141,323
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Premium Data
* Total H Index Rankings
Rankings
2,524
World Rank
1,075
Country Rank
13
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
2,618
World Rank
1,121
Country Rank
14
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
2,818
World Rank
1,221
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-Index141
-
i10 Index283
-
Citation Counts99,765
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* Total H Index Rankings
Rankings
3,253
World Rank
1,421
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 Index443
-
Citation Counts87,948
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* Total H Index Rankings
Rankings
3,614
World Rank
1,581
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-Index132
-
i10 Index391
-
Citation Counts65,854
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Premium Data
* Total H Index Rankings
Rankings
3,829
World Rank
1,681
Country Rank
18
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
3,908
World Rank
1,726
Country Rank
19
University
Ranking Based On Selection:
19
* Total H Index Rankings
Rankings
4,311
World Rank
1,913
Country Rank
20
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
4,948
World Rank
2,207
Country Rank
21
University
Ranking Based On Selection:
21
Engineering & Technology / Meteorology & Atmospheric Sciences
Atmospheric science | physical chemistry | geochemistry | carbon cycl
Atmospheric science | physical chemistry | geochemistry | carbon cycl
H-Index Metrics
-
H-Index122
-
i10 Index356
-
Citation Counts51,099
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Premium Data
* Total H Index Rankings
Rankings
5,190
World Rank
2,312
Country Rank
22
University
Ranking Based On Selection:
22
* Total H Index Rankings
Rankings
5,489
World Rank
2,427
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-Index119
-
i10 Index202
-
Citation Counts105,992
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Premium Data
* Total H Index Rankings
Rankings
5,659
World Rank
2,508
Country Rank
24
University
Ranking Based On Selection:
24
Natural Sciences / Physics
Microcavities | Microresonators | Nonlinear Optics | Optical Physics | Photonic
Microcavities | Microresonators | Nonlinear Optics | Optical Physics | Photonic
H-Index Metrics
-
H-Index118
-
i10 Index342
-
Citation Counts68,136
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Premium Data
* Total H Index Rankings
Rankings
5,779
World Rank
2,571
Country Rank
25
University
Ranking Based On Selection:
25
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