Total 2,424,675 scientists, country 221, and institutions 24,468 are evaluated in the Productivity Rankings, an exclusive service provided by AD Scientific Index. This ranking measures and highlights the scientific productivity of researchers based on the i10 index (number of publications with at least 10 citations). This system identifies highly productive scientists across disciplines, institutions, and regions, contributing to the development of evidence-based academic policies and effective incentive mechanisms. The rankings include global, regional, and institutional analyses, along with specialized rankings such as Scientists' Last 6 Years' i10 Index and Universities' i10 Index Rankings 2025. With Premium Membership, you can:
- Gain full access to detailed comparisons and advanced analytics,
- Objectively evaluate your academic productivity,
- Make strategic, data-driven decisions to enhance performance.
* Total i10 IndexRankings
Ranking Based On Selection: 1
![Thorhallur I Halldorsson](https://cdn.adscientificindex.com/pictures/30/1847369.jpg)
Nutritional and environmental epidemiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
172
151
0.878
* Total i10 IndexRankings
Ranking Based On Selection: 2
![Bryndis Eva Birgisdottir](/user/assets/images/profile/no-profile-photo.png)
Food and nutrition
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
57
38
0.667
* Total i10 IndexRankings
Ranking Based On Selection: 3
![Guðrún Ólafsdóttir](https://cdn.adscientificindex.com/pictures/85/1842533.jpg)
Food value chains
Sustainability assessments
fish quality
life cycle assessments
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
57
30
0.526
* Total i10 IndexRankings
Ranking Based On Selection: 4
![Gudjon Thorkelsson](https://cdn.adscientificindex.com/pictures/ed/1842519.jpg)
Food quality and product development
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
34
0.708
* Total i10 IndexRankings
Ranking Based On Selection: 5
![María Guðjónsdóttir](https://cdn.adscientificindex.com/pictures/70/1844618.jpg)
food
NMR/MRI
spectroscopy
processing
optimization
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
42
35
0.833
* Total i10 IndexRankings
Ranking Based On Selection: 6
![Olof Gudny Geirsdottir](https://cdn.adscientificindex.com/pictures/fb/1845594.jpg)
nutrition
geriatrics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
21
20
0.952
* Total i10 IndexRankings
Ranking Based On Selection: 7
![Ólafur Ögmundarson](https://cdn.adscientificindex.com/pictures/a2/4729209.jpg)
Life Cycle Assessment
Bio-chemicals
Food production systems Sustainability
Blue bio-economy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
11
10
0.909
* Total i10 IndexRankings
Ranking Based On Selection: 8
![Bjorn Adalbjornsson](https://cdn.adscientificindex.com/pictures/5d/5269326.jpg)
Food Science
Food Chemistry
Food Innovation
Product Development
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
6
5
0.833
* Total i10 IndexRankings
Ranking Based On Selection: 9
![Romauli Juliana Napitupulu](https://cdn.adscientificindex.com/pictures/04/5269309.jpg)
food science
fish processing
marine biochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
2
1
0.500
* Total i10 IndexRankings
Ranking Based On Selection: 10
![Clara Vasquez-Mejia](https://cdn.adscientificindex.com/pictures/ba/5269939.jpg)
Food systems
LCA
Water footprint
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
Thorhallur I Halldorsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
172
151
0.878
Nutritional and environmental epidemiology
Bryndis Eva Birgisdottir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
57
38
0.667
Guðrún Ólafsdóttir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
57
30
0.526
Food value chains
Sustainability assessments
fish quality
life cycle assessments
Gudjon Thorkelsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
48
34
0.708
Food quality and product development
María Guðjónsdóttir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
42
35
0.833
food
NMR/MRI
spectroscopy
processing
optimization
Olof Gudny Geirsdottir
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
21
20
0.952
nutrition
geriatrics
Ólafur Ögmundarson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
11
10
0.909
Life Cycle Assessment
Bio-chemicals
Food production systems Sustainability
Blue bio-economy
Bjorn Adalbjornsson
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
6
5
0.833
Food Science
Food Chemistry
Food Innovation
Product Development
Romauli Juliana Napitupulu
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
2
1
0.500
food science
fish processing
marine biochemistry
Clara Vasquez-Mejia
University of Iceland
Reykjavík, Iceland
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
Food systems
LCA
Water footprint