World Scientist and University Rankings 2025
Oman Engineering & Technology 24 Scientists Subject Rankings - 2025
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 6 years. As of Jun 19, 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 (1.121.318) 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
169,218
World Rank
53
Country Rank
33
University
Ranking Based On Selection:
1
Engineering & Technology / Environmental Science & Engineering
Microbial electrochemistry | BIo-Hydrogen | Membrane Separation | Aanaerobic digestion | Air pollutio
Microbial electrochemistry | BIo-Hydrogen | Membrane Separation | Aanaerobic digestion | Air pollutio
H-Index Metrics
-
H-Index37
-
i10 Index62
-
Citation Counts3,788
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
190,525
World Rank
67
Country Rank
43
University
Ranking Based On Selection:
2
Engineering & Technology / Environmental Science & Engineering
Earth and Planetary Sciences | Climate Change | Renewable Energ
Earth and Planetary Sciences | Climate Change | Renewable Energ
H-Index Metrics
-
H-Index35
-
i10 Index81
-
Citation Counts8,117
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
231,324
World Rank
78
Country Rank
49
University
Ranking Based On Selection:
3
Engineering & Technology / Environmental Science & Engineering
Water Quality | Desalination | Soil Salinit
Water Quality | Desalination | Soil Salinit
H-Index Metrics
-
H-Index32
-
i10 Index75
-
Citation Counts4,562
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
255,853
World Rank
91
Country Rank
58
University
Ranking Based On Selection:
4
Engineering & Technology / Environmental Science & Engineering
Waste valorization | Biorefinery | Biofuel | Bioplasti
Waste valorization | Biorefinery | Biofuel | Bioplasti
H-Index Metrics
-
H-Index30
-
i10 Index49
-
Citation Counts2,901
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
382,880
World Rank
187
Country Rank
120
University
Ranking Based On Selection:
5
* Total H Index Rankings
Rankings
395,774
World Rank
193
Country Rank
124
University
Ranking Based On Selection:
6
Engineering & Technology / Environmental Science & Engineering
Hydrogeology | Groundwater modeling | Decision support system
Hydrogeology | Groundwater modeling | Decision support system
H-Index Metrics
-
H-Index23
-
i10 Index36
-
Citation Counts1,335
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
403,830
World Rank
202
Country Rank
1
University
Ranking Based On Selection:
7
Engineering & Technology / Environmental Science & Engineering
Waste Management | Landfilling | Biogas | Expert Syste
Waste Management | Landfilling | Biogas | Expert Syste
H-Index Metrics
-
H-Index23
-
i10 Index37
-
Citation Counts1,409
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
415,229
World Rank
216
Country Rank
6
University
Ranking Based On Selection:
8
Engineering & Technology / Environmental Science & Engineering
Groundwater Hydrology | Geo-environmental Engineering | Contaminant transport in groundwater | Imag
Groundwater Hydrology | Geo-environmental Engineering | Contaminant transport in groundwater | Imag
H-Index Metrics
-
H-Index22
-
i10 Index52
-
Citation Counts2,082
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
432,722
World Rank
228
Country Rank
148
University
Ranking Based On Selection:
9
Engineering & Technology / Environmental Science & Engineering
Environmental chemistry | Analytical chemistry | Water treatment | Adsorption | Waste treatmen
Environmental chemistry | Analytical chemistry | Water treatment | Adsorption | Waste treatmen
H-Index Metrics
-
H-Index22
-
i10 Index29
-
Citation Counts2,454
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
482,914
World Rank
272
Country Rank
175
University
Ranking Based On Selection:
10
Engineering & Technology / Environmental Science & Engineering
Environmental Impact Assessment | Pollution remediation and waste management | Climate change adaptation
Environmental Impact Assessment | Pollution remediation and waste management | Climate change adaptation
H-Index Metrics
-
H-Index20
-
i10 Index32
-
Citation Counts1,201
Get Full Access to
Premium Data
Is Your University Ready for the Future?
Compare your institution’s global, national, and city-level ranking with its 20 closest competitors and set strategic goals.
Gain insights from detailed performance analyses of scientists across 13 major disciplines, identify your strengths, improve weaknesses, and gain a competitive edge.. Check Your Free Sample Performance Analysis
* Total H Index Rankings
Rankings
693,632
World Rank
439
Country Rank
278
University
Ranking Based On Selection:
11
* Total H Index Rankings
Rankings
765,517
World Rank
494
Country Rank
14
University
Ranking Based On Selection:
12
Engineering & Technology / Environmental Science & Engineering
Nano Membrane Technology | Biosorption Environmental Engineering | Renewable Energ
Nano Membrane Technology | Biosorption Environmental Engineering | Renewable Energ
H-Index Metrics
-
H-Index13
-
i10 Index26
-
Citation Counts1,101
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
849,182
World Rank
557
Country Rank
25
University
Ranking Based On Selection:
13
* Total H Index Rankings
Rankings
897,121
World Rank
591
Country Rank
40
University
Ranking Based On Selection:
14
Engineering & Technology / Environmental Science & Engineering
Environmental and Water Resources Engineering (Groundwater Modeling
Environmental and Water Resources Engineering (Groundwater Modeling
H-Index Metrics
-
H-Index11
-
i10 Index13
-
Citation Counts620
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
910,833
World Rank
606
Country Rank
32
University
Ranking Based On Selection:
15
Engineering & Technology / Environmental Science & Engineering
Chemical and Environmental Engineerin
Chemical and Environmental Engineerin
H-Index Metrics
-
H-Index11
-
i10 Index14
-
Citation Counts522
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
982,266
World Rank
653
Country Rank
353
University
Ranking Based On Selection:
16
Engineering & Technology / Environmental Science & Engineering
Water Treatment | Soil Science and Environmental issue
Water Treatment | Soil Science and Environmental issue
H-Index Metrics
-
H-Index10
-
i10 Index10
-
Citation Counts584
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
1,045,008
World Rank
696
Country Rank
363
University
Ranking Based On Selection:
17
Engineering & Technology / Environmental Science & Engineering
soils and water resources management | sustainable environmental management | HYDRUS modellin
soils and water resources management | sustainable environmental management | HYDRUS modellin
H-Index Metrics
-
H-Index9
-
i10 Index9
-
Citation Counts322
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
1,312,006
World Rank
869
Country Rank
69
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
1,352,322
World Rank
910
Country Rank
10
University
Ranking Based On Selection:
19
* Total H Index Rankings
Rankings
1,386,432
World Rank
938
Country Rank
417
University
Ranking Based On Selection:
20
Engineering & Technology / Environmental Science & Engineering
Water resources management | Hydrology | Environmental Science | Data Analytics | Genetic Programmin
Water resources management | Hydrology | Environmental Science | Data Analytics | Genetic Programmin
H-Index Metrics
-
H-Index6
-
i10 Index6
-
Citation Counts328
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
1,841,730
World Rank
1,386
Country Rank
81
University
Ranking Based On Selection:
21
Engineering & Technology / Environmental Science & Engineering
Wastewater treatment | Environmental Engineering | Heat Transfer | Renewable Energ
Wastewater treatment | Environmental Engineering | Heat Transfer | Renewable Energ
H-Index Metrics
-
H-Index4
-
i10 Index1
-
Citation Counts162
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
2,174,324
World Rank
1,799
Country Rank
105
University
Ranking Based On Selection:
22
Engineering & Technology / Environmental Science & Engineering
Chemical Engineering | Environmental Engineerin
Chemical Engineering | Environmental Engineerin
H-Index Metrics
-
H-Index2
-
i10 Index2
-
Citation Counts82
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
2,267,402
World Rank
1,955
Country Rank
21
University
Ranking Based On Selection:
23
Engineering & Technology / Environmental Science & Engineering
Environmental Management | Occupational Safety and Health | Bioremediatio
Environmental Management | Occupational Safety and Health | Bioremediatio
H-Index Metrics
-
H-Index2
-
i10 Index1
-
Citation Counts15
Get Full Access to
Premium Data
* Total H Index Rankings
Rankings
2,458,408
World Rank
2,282
Country Rank
21
University
Ranking Based On Selection:
24
Discover Universities That Trust Us
Curious about institutions benefiting from the AD Scientific Index?
View Our References
360° Real-Time Institutional Analysis
🔍 Uncover Your University’s Full Potential – In Real Time!
- ✔ Instantly monitor your academic performance.
- ✔ Track trends and changes by departments.
- ✔ Benchmark your position globally, regionally, nationally, and locally.
- ✔ Identify weaknesses and areas for improvement.
- ✔ Shape your strategy with interactive dashboards and expert insights.
Unlock Your Academic Potential Today
Stand out, get recognized, and grow your academic impact.
- ✔ Fast-track profile updates in 1–3 business days
- ✔ Personalized academic certificate to prove your standing
- ✔ Be listed first in the “Find an Expert” search
- ✔ Get exclusive discounts with 1-year or 3-year plans