Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation Index, Universities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025
* Total Citation Counts Rankings
Ranking Based On Selection :1
Renewable energy
biomass
gasification
biofuels
gas turbine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,048
751
0.717
* Total Citation Counts Rankings
Ranking Based On Selection :2
Machine Elements Design
Manufacturing Process
Engineering Materials
Tribology of Materials.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
592
362
0.611
* Total Citation Counts Rankings
Ranking Based On Selection :3
Mechanical Engineering (Industrial Eng.)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
72
67
0.931
* Total Citation Counts Rankings
Ranking Based On Selection :4
Renewable Energy Systems
Modelling and Simulation of Air Pollution Dispersion
Computational Fluid
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58
51
0.879
KA Al-Attab
Sana'a University
Sana'a, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,048
751
0.717
Renewable energy
biomass
gasification
biofuels
gas turbine
Mohammed Ahmed Al-Bukhaiti
Sana'a University
Sana'a, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
592
362
0.611
Machine Elements Design
Manufacturing Process
Engineering Materials
Tribology of Materials.
Abdulrakeb Ghaleb
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
72
67
0.931
Mechanical Engineering (Industrial Eng.)
Hamoud A. Al-Nehari
Sana'a University
Sana'a, Yemen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
58
51
0.879
Renewable Energy Systems
Modelling and Simulation of Air Pollution Dispersion
Computational Fluid