Nikolay Umov
Nikolay Alekseevich Umov was a Russian physicist and mathematician known for discovering the concept of UmovPoynting vector and Umov effect.
Umov was born in 1846 in Simbirsk in the family of a military doctor. He graduated from the Physics and Mathematics department of Moscow State University in 1867 and became a Professor of Physics in 1875. He studied theoretical physics by reading works of Gabriel Lam, Clebsch and Clausius, that made a significant impact on the originality of his later ideas in physics.
Source: Wikipedia