Researchers affiliated with Missouri S&T are among the top 0.05% cited scholars in the world, recognized either for their lifetime of work or for research over the past five years, according to the 2025 Highly Ranked Scholars list developed by ScholarGPS. 
 
For lifetime rankings, Dr. Sajal Das, S&T’s Daniel St. Clair Endowed Chair and a Curators’ Distinguished Professor of computer science, was listed as the most cited researcher in the world for mobile computing and as one of the top scholars in five other computer science specialty areas. 
 
Dr. Albert E. Ruehli, an adjunct professor of electrical and computer engineering by courtesy appointment, was the best in the world for equivalent circuits, and Dr. Martin E. Straumanis, a former research professor of metallurgical engineering, was No. 1 for lattice constants.  
 
Dr. Shelley Minteer, director of the Kummer Institute Center for Resource Sustainability and the Dr. Ken Robertson Memorial Professor in Chemistry, was No. 2 in the world for biofuel, and Dr. Mohamed Rahaman, professor emeritus of materials science and engineering, was No. 3 for sintering. 
 
“To be recognized as a Highly Ranked Scholar, researchers must rank in the top 0.05% worldwide, which means essentially only one out of every 2,000 authors would qualify,” says Dr. Kamal Khayat, S&T’s vice chancellor for research and innovation and the world’s No. 2 most-cited rheology researcher for the past five years. “Having so many Missouri S&T-affiliated researchers included is a testament to the extraordinary research community we have built in Rolla and the difference our work is making on a global scale.” 
 
Researchers are ranked based on their number of publications and number of citations, as well as their h-index, which measures how widely their work is cited. 
 
Das’ other lifetime specialty rankings include No. 7 in wireless sensor network, No. 25 in distributed computing, No. 27 in sensor, No. 29 in wireless and No. 57 in environment (systems). Across all research areas, he was also No. 3,621 over the past five years and No. 4,229 lifetime, and he was No. 619 for the field of engineering and No. 114 for the computer science discipline.
 
Other rankings for Rahaman include No. 18 lifetime for ceramic and No. 34 for scaffolding. 
 
Minteer was also No. 1,710 over the past five years and No. 8,589 lifetime across all research fields, No. 294 over the past five years and No. 1,824 lifetime for the physical sciences field, No. 149 over the past five years for the chemistry discipline and No. 124 lifetime for the enzyme specialty.

Khayat’s other rankings include No. 3,621 over the past five years across all research fields, No. 15 lifetime in building material and No. 32 for the past five years and No. 96 lifetime for composite material. 

Dr. Islam El-adaway, associate provost for St. Louis operations and Hurst-McCarthy Professor of Construction Engineering and Management, was also a top scholar across all research fields, rankings No. 3,895 over the past five years.

Other Missouri S&T-affiliated researchers included in the Highly Ranked Scholars list for specialty areas are included below, beginning with those earning the highest rankings in their respective specialty areas.  

• Dr. Nuran Ercal, Chancellor’s Professor of chemistry, No. 4 lifetime in acetylcysteine 

• Dr. Todd Hubing, former professor of electrical engineering, No. 4 lifetime in electromagnetic compatibility 

• Dr. Hai-Lung Tsai, former professor of mechanical and aerospace engineering, No. 4 lifetime in arc welding and No. 312 in laser 

• Dr. Leslie Koval, professor emeritus of mechanical engineering, No. 5 lifetime in transmission (mechanics) 

• Dr. Chen Zhu, associate research professor of electrical and computer engineering, No. 6 for the past five years in optical fiber and No. 121 in sensor 

• Dr. William Fahrenholtz, Curators’ Distinguished Professor of ceramic engineering, No. 6 for the past five years and No. 11 lifetime in ceramic 

• Dr. Gregory Hilmas, Curators’ Distinguished Professor of ceramic engineering, No. 8 for the past five years and No. 19 lifetime in ceramic 

• Dr. Jie Huang, Roy A. Wilkens Professor of electrical engineering, No. 8 for the past five years in optical fiber, No. 89 in sensor and No. 144 in machine learning 

• Dr. Walter Eversman, Curators’ Distinguished Professor emeritus of aerospace engineering, No. 9 lifetime in transmission (mechanics) 

• Dr. James Drewniak, professor emeritus of electrical and computer engineering, No. 9 lifetime in electromagnetic compatibility 

• Dr. Muthanna Al-Dahhan, Curators’ Distinguished Professor of chemical and biochemical engineering and Wayne and Gayle Laufer Endowed Chair in Energy, No. 15 lifetime in chemical reactor 

• Dr. Sanjay Madria, Curators’ Distinguished Professor of computer science, No. 16 lifetime in data management 

• Dr. Donald Wunsch, Mary K. Finley Missouri Distinguished Professor of Electrical and Computer Engineering and director of the Kummer Institute Center for Artificial Intelligence and Autonomous Systems, No. 26 lifetime in neural network 

• Dr. Ming C. Leu, Keith and Pat Bailey Distinguished Professor of Integrated Product Manufacturing and Curators’ Distinguished Professor of mechanical and aerospace engineering, No. 35 lifetime in 3D printing and No. 70 in manufacturing 

• Dr. Baojun Bai, Curators’ Distinguished Professor and Lester R. Birbeck Chair in Petroleum Engineering, No. 37 lifetime in petroleum 

• Dr. R.D. DuBois, professor emeritus of physics, No. 40 lifetime in ionization 

• Dr. Thomas Vojta, Curators’ Distinguished Professor and chair of physics, No. 48 in phase transition 

• Dr. Don Madison, Curators’ Distinguished Professor emeritus of physics, No. 48 lifetime in ionization 

• Dr. Mariesa Crow, professor emerita of electrical and computer engineering, No. 53 lifetime in electric power system, No. 95 in electric power and No. 738 in energy 

• Dr. Delbert Day, Curators’ Distinguished Professor emeritus of ceramic engineering, No. 78 lifetime in ceramic  

• Dr. Jagannathan Sarangapani, Curators’ Distinguished Professor and William A. Rutledge-Emerson Electric Co. Distinguished Professor of electrical engineering, No. 79 lifetime in neural network 

• Dr. Frank Liou, Curators’ Distinguished Professor and Michael and Joyce Bytnar Product Innovation and Creativity Professor of mechanical and aerospace engineering, No. 192 lifetime in manufacturing  

• Dr. Sivasubramanya Balakrishnan, former Curators’ Distinguished Professor of aerospace engineering, No. 281 lifetime in control theory. 

About Missouri S&T

Missouri University of Science and Technology (Missouri S&T) is a STEM-focused research university of over 7,000 students located in Rolla, Missouri. Part of the four-campus University of Missouri System, Missouri S&T offers over 100 degrees in 40 areas of study and is among the nation’s top public universities for salary impact, according to the Wall Street Journal. For more information about Missouri S&T, visit www.mst.edu.