Abstract
On May 20, 2021, the head of the Laboratory of Lithodynamics and Geology of the Southern Department of the Institute of Oceanology of the Russian Academy of Sciences, Professor, Doctor of Geographical Sciences, prominent scientist and public figure Kosyan Ruben Derenikovich is 75 years old. R.D. Kosyan is a leading Russian expert in the field of studying the regularities of hydrogenic movements of detrital material in the coastal zone of the sea. He is a participant of many expeditions and thematic conferences, an expert on some major international projects, and lectures in various countries of the world. Under his leadership, a group of models was developed to calculate the long-shore sediment discharge, as well as the associated deformation of the relief in the coastal zone of the sea. R.D. Kosyan was awarded the Order of Courage, as well as the International Medal of the Black Sea Commission for merits in the study of the Black Sea. Congratulations to the wonderful scientist-oceanologist on the solemn date.
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