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World Scientist and University Rankings 2026
Romania Engineering & Technology / Petroleum Engineering 29 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 08, 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 (1.131.927) 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
597,137
World Rank
1,259
Country Rank
157
University
Ranking Based On Selection:
1
Engineering & Technology / Petroleum Engineering
Ancient ceramics | Petrology | Ophiolites | Geochemistry | Gemolog
Ancient ceramics | Petrology | Ophiolites | Geochemistry | Gemolog
H-Index Metrics
-
H-Index18
-
i10 Index36
-
Citation Counts1,248
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* Total H Index Rankings
Rankings
600,846
World Rank
1,278
Country Rank
1
University
Ranking Based On Selection:
2
Engineering & Technology / Petroleum Engineering
Artificial intelligence applied in environmental protection | engineering and educatio
Artificial intelligence applied in environmental protection | engineering and educatio
H-Index Metrics
-
H-Index18
-
i10 Index31
-
Citation Counts1,006
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Premium Data
* Total H Index Rankings
Rankings
653,375
World Rank
1,502
Country Rank
3
University
Ranking Based On Selection:
3
Engineering & Technology / Petroleum Engineering
Artificial intelligence | Machine learning | IoT | Digital twin | Database
Artificial intelligence | Machine learning | IoT | Digital twin | Database
H-Index Metrics
-
H-Index16
-
i10 Index18
-
Citation Counts367
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Premium Data
* Total H Index Rankings
Rankings
807,301
World Rank
2,401
Country Rank
8
University
Ranking Based On Selection:
4
Engineering & Technology / Petroleum Engineering
Food and non-food science | Consumer behavior | AI and IoT in economics | Industry 5.0 and 6.
Food and non-food science | Consumer behavior | AI and IoT in economics | Industry 5.0 and 6.
H-Index Metrics
-
H-Index13
-
i10 Index21
-
Citation Counts449
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Premium Data
* Total H Index Rankings
Rankings
1,047,974
World Rank
4,287
Country Rank
23
University
Ranking Based On Selection:
5
Engineering & Technology / Petroleum Engineering
Gas Transport | Gas Distribution | Numerical simulation in transport of hydrocarbon
Gas Transport | Gas Distribution | Numerical simulation in transport of hydrocarbon
H-Index Metrics
-
H-Index10
-
i10 Index10
-
Citation Counts291
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Premium Data
* Total H Index Rankings
Rankings
1,105,555
World Rank
4,907
Country Rank
29
University
Ranking Based On Selection:
6
* Total H Index Rankings
Rankings
1,141,061
World Rank
5,119
Country Rank
32
University
Ranking Based On Selection:
7
* Total H Index Rankings
Rankings
1,152,419
World Rank
5,219
Country Rank
33
University
Ranking Based On Selection:
8
Engineering & Technology / Petroleum Engineering
geoscience | mineralogy | crystal structure | petroleum engineering | energy and environmen
geoscience | mineralogy | crystal structure | petroleum engineering | energy and environmen
H-Index Metrics
-
H-Index9
-
i10 Index7
-
Citation Counts342
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Premium Data
* Total H Index Rankings
Rankings
1,181,226
World Rank
5,612
Country Rank
35
University
Ranking Based On Selection:
9
* Total H Index Rankings
Rankings
1,213,068
World Rank
5,875
Country Rank
38
University
Ranking Based On Selection:
10
* Total H Index Rankings
Rankings
1,311,882
World Rank
6,897
Country Rank
52
University
Ranking Based On Selection:
11
Engineering & Technology / Petroleum Engineering
Computer-aided modeling and simulation | advanced process contro
Computer-aided modeling and simulation | advanced process contro
H-Index Metrics
-
H-Index8
-
i10 Index4
-
Citation Counts144
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Premium Data
* Total H Index Rankings
Rankings
1,456,005
World Rank
8,149
Country Rank
63
University
Ranking Based On Selection:
12
* Total H Index Rankings
Rankings
1,551,749
World Rank
8,657
Country Rank
356
University
Ranking Based On Selection:
13
Engineering & Technology / Petroleum Engineering
petroleum geology | petroleum geochemistry | source rock evaluation | elemental geochemistry | petroleum system modellin
petroleum geology | petroleum geochemistry | source rock evaluation | elemental geochemistry | petroleum system modellin
H-Index Metrics
-
H-Index6
-
i10 Index2
-
Citation Counts83
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Premium Data
* Total H Index Rankings
Rankings
1,587,035
World Rank
8,996
Country Rank
69
University
Ranking Based On Selection:
14
* Total H Index Rankings
Rankings
1,626,062
World Rank
9,674
Country Rank
77
University
Ranking Based On Selection:
15
* Total H Index Rankings
Rankings
1,650,270
World Rank
9,838
Country Rank
79
University
Ranking Based On Selection:
16
* Total H Index Rankings
Rankings
1,781,033
World Rank
10,554
Country Rank
90
University
Ranking Based On Selection:
17
Engineering & Technology / Petroleum Engineering
Encryption algorithms for data security | discrete events systems analysis and simulatio
Encryption algorithms for data security | discrete events systems analysis and simulatio
H-Index Metrics
-
H-Index5
-
i10 Index2
-
Citation Counts122
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Premium Data
* Total H Index Rankings
Rankings
1,816,040
World Rank
11,114
Country Rank
96
University
Ranking Based On Selection:
18
* Total H Index Rankings
Rankings
1,821,444
World Rank
11,238
Country Rank
99
University
Ranking Based On Selection:
19
* Total H Index Rankings
Rankings
1,938,331
World Rank
11,716
Country Rank
107
University
Ranking Based On Selection:
20
* Total H Index Rankings
Rankings
1,972,196
World Rank
11,905
Country Rank
109
University
Ranking Based On Selection:
21
* Total H Index Rankings
Rankings
1,976,827
World Rank
11,946
Country Rank
110
University
Ranking Based On Selection:
22
* Total H Index Rankings
Rankings
1,983,712
World Rank
12,018
Country Rank
113
University
Ranking Based On Selection:
23
* Total H Index Rankings
Rankings
2,102,109
World Rank
12,860
Country Rank
123
University
Ranking Based On Selection:
24
Engineering & Technology / Petroleum Engineering
Measurement | Robots | Welding system | Automated system
Measurement | Robots | Welding system | Automated system
H-Index Metrics
-
H-Index3
-
i10 Index1
-
Citation Counts60
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Premium Data
* Total H Index Rankings
Rankings
2,192,040
World Rank
13,428
Country Rank
132
University
Ranking Based On Selection:
25
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