In Memory of Sergey G. Psakhie

This introductory chapter is dedicated to the life and work of Sergey Grigirievich Psakhie, his outstanding contributions to the development of science and education in Russia and especially in the Tomsk region as well as to his numerous international collaborations and research interests. It further includes personal notes from some of his closest collaborators: Georg-Peter Ostermeyer, Valentin L. Popov, Lev B. Zuev and Valery V. Ruzich. The Chapter is concluded by an overview of Sergey G. Psakhie’s most significant scientific publications.