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 29, 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: 26
Analytical Chemistry
Environmental Monitoring
Chromatography
Metrics
H-Index
i10 Index
Citation Counts
32
51
3,629
* Total H IndexRankings
Ranking Based On Selection: 27
Nanotechnology
Water Treatment Chemistry
Carbon Nanostructured Materials
Heterostructured Materials
Membrane Science and Tec
Metrics
H-Index
i10 Index
Citation Counts
32
83
3,501
* Total H IndexRankings
Ranking Based On Selection: 28
Energy storage hybrid-materials
Graphene-based Nanomaterials
Metrics
H-Index
i10 Index
Citation Counts
32
57
2,809
* Total H IndexRankings
Ranking Based On Selection: 29
Nanoscience and Nanotechnology
Surface Science
Nanophosphors
Energy
Material Sciences
Metrics
H-Index
i10 Index
Citation Counts
31
87
3,898
* Total H IndexRankings
Ranking Based On Selection: 30
Informetrics
Information and Knowledge management
Information retrieval
Information literacy
Metrics
H-Index
i10 Index
Citation Counts
30
75
2,577
* Total H IndexRankings
Ranking Based On Selection: 31
Environmental Microbiology and Biotechnology
Water quality
Microbial Ecology
Metrics
H-Index
i10 Index
Citation Counts
29
64
3,710
* Total H IndexRankings
Ranking Based On Selection: 32
Renewable Energy
Solid State Lighting
Nanoscience
Physics
Metrics
H-Index
i10 Index
Citation Counts
29
58
2,339
* Total H IndexRankings
Ranking Based On Selection: 33
Banking and financial inclusion
emerging markets
migration economics
Metrics
H-Index
i10 Index
Citation Counts
29
45
2,234
* Total H IndexRankings
Ranking Based On Selection: 34
archives
records management
libraries
languages
Metrics
H-Index
i10 Index
Citation Counts
28
72
2,737
* Total H IndexRankings
Ranking Based On Selection: 35
Coordination chemistry
Magnetic nanoparticle
Photocatalyst
Acid mine drainage
Emerging organic pollutant
Metrics
H-Index
i10 Index
Citation Counts
28
37
4,594
* Total H IndexRankings
Ranking Based On Selection: 36
ICTs in education
e-Schools
ICT4D
Metrics
H-Index
i10 Index
Citation Counts
28
43
1,527
* Total H IndexRankings
Ranking Based On Selection: 37
reading
additional language learning
vocabulary
Metrics
H-Index
i10 Index
Citation Counts
28
40
2,618
* Total H IndexRankings
Ranking Based On Selection: 38
Health-related research
postgraduate nursing education
public health issues
Metrics
H-Index
i10 Index
Citation Counts
28
57
2,107
* Total H IndexRankings
Ranking Based On Selection: 39
Participatory democracy and governance to address complex challenges
Metrics
H-Index
i10 Index
Citation Counts
27
80
2,588
* Total H IndexRankings
Ranking Based On Selection: 40
parent involvement
academic habitus
cultural diversity
Metrics
H-Index
i10 Index
Citation Counts
27
60
2,661
* Total H IndexRankings
Ranking Based On Selection: 41
Alternative fuel (biodiesel
biogas and bioethanol)
Energy efficiency and conservation
Solar energy
Heat & Mass Transfer
Metrics
H-Index
i10 Index
Citation Counts
26
51
2,851
* Total H IndexRankings
Ranking Based On Selection: 42
Politics
Philosophy and Economics
Metrics
H-Index
i10 Index
Citation Counts
26
49
9,149
* Total H IndexRankings
Ranking Based On Selection: 43
Institute for Nanotechnology and Water Sustainability (iNanoWS)
Metrics
H-Index
i10 Index
Citation Counts
26
44
2,231
* Total H IndexRankings
Ranking Based On Selection: 44
Environmental Biotechnology
Science Education
Metrics
H-Index
i10 Index
Citation Counts
26
43
2,121
* Total H IndexRankings
Ranking Based On Selection: 45
Heterogeneous Catalysis
Metrics
H-Index
i10 Index
Citation Counts
26
37
2,686
* Total H IndexRankings
Ranking Based On Selection: 46
Change Management
Curriculum Theory
Decolonisation
Education Leadership
Education Policy
Metrics
H-Index
i10 Index
Citation Counts
26
46
2,585
* Total H IndexRankings
Ranking Based On Selection: 47
philosophy of education/open distance learning/indigenous epistemological/educational research
Metrics
H-Index
i10 Index
Citation Counts
25
42
3,047
* Total H IndexRankings
Ranking Based On Selection: 48
Project Management
Procurement Systems and Management
Project Contracts
Construction Industry Development
Small Micro and Me
Metrics
H-Index
i10 Index
Citation Counts
25
57
2,072
* Total H IndexRankings
Ranking Based On Selection: 49
Metrics
H-Index
i10 Index
Citation Counts
23
34
1,523
* Total H IndexRankings
Ranking Based On Selection: 50
Environmental Analytical Chemistry
Chromatography
Metrics
H-Index
i10 Index
Citation Counts
23
36
1,738
Lawrence Madikizela
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
32
51
3,629
Analytical Chemistry
Environmental Monitoring
Chromatography
Edward Nxumalo
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
32
83
3,501
Nanotechnology
Water Treatment Chemistry
Carbon Nanostructured Materials
Heterostructured Materials
Membrane Science and Tec
Jack MJ Madito
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
32
57
2,809
Energy storage hybrid-materials
Graphene-based Nanomaterials
Simon Dhlamini
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
31
87
3,898
Nanoscience and Nanotechnology
Surface Science
Nanophosphors
Energy
Material Sciences
Omwoyo Bosire Onyancha
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
30
75
2,577
Informetrics
Information and Knowledge management
Information retrieval
Information literacy
Memory Tekere
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
29
64
3,710
Environmental Microbiology and Biotechnology
Water quality
Microbial Ecology
Bakang Moses Mothudi
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
29
58
2,339
Renewable Energy
Solid State Lighting
Nanoscience
Physics
Daniel Makina
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
29
45
2,234
Banking and financial inclusion
emerging markets
migration economics
Mpho Ngoepe
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
28
72
2,737
archives
records management
libraries
languages
Kebede Keterew Kefeni
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
28
37
4,594
Coordination chemistry
Magnetic nanoparticle
Photocatalyst
Acid mine drainage
Emerging organic pollutant
Leila Goosen
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
28
43
1,527
ICTs in education
e-Schools
ICT4D
Lilli Pretorius
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
28
40
2,618
reading
additional language learning
vocabulary
Valerie Ehlers
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
28
57
2,107
Health-related research
postgraduate nursing education
public health issues
Janet Mcintyre-Mills
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
27
80
2,588
Participatory democracy and governance to address complex challenges
Eleanor Lemmer
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
27
60
2,661
parent involvement
academic habitus
cultural diversity
Christopher Enweremadu
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
26
51
2,851
Alternative fuel (biodiesel
biogas and bioethanol)
Energy efficiency and conservation
Solar energy
Heat & Mass Transfer
Smanga Hlongwa
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
26
49
9,149
Politics
Philosophy and Economics
Mathew Nindi
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
26
44
2,231
Institute for Nanotechnology and Water Sustainability (iNanoWS)
Harrison Atagana
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
26
43
2,121
Environmental Biotechnology
Science Education
Linda Jewell
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
26
37
2,686
Heterogeneous Catalysis
Vuyisile Msila
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
26
46
2,585
Change Management
Curriculum Theory
Decolonisation
Education Leadership
Education Policy
Moeketsi Letseka
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
25
42
3,047
philosophy of education/open distance learning/indigenous epistemological/educational research
Pantaleo D Rwelamila
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
25
57
2,072
Project Management
Procurement Systems and Management
Project Contracts
Construction Industry Development
Small Micro and Me
Sin-Yu Ho
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
23
34
1,523
Somandla Ncube
University of South Africa
Pretoria, South Africa
Metrics
H-Index
i10-Index
Citation Counts
23
36
1,738
Environmental Analytical Chemistry
Chromatography