ARKADIY STOYANOV`S CONTRIBUTION TO THE KINEMATICS OF THE IDEAL RIGID BODY Dedicated on the Occasion of Prof. <...> Its major contributions in the field of Kinematics of the most general movement of a rigid body based on Prof. <...> On December 7th 2006 we celebrated the 110th anniversary from the birth of the prominent Bulgarian scientist and mechanicanProf. <...> A. Stoyanov were given in the preface to the last edition of his text-book “Theoretical Mechanics”, Part I, Statics, by Assoc. <...> A. Stoyanov was born in Lovetch, in the family of one of the founders of the Medical Faculty in Sofia and a surgery professor of long standing – Dr. Paraskev Stoyanov. <...> A. Stoyanov`mother was of Russian origin and was highly educated and spiritually rich person. <...> In the same year the latter was enrolled in the Sofia University, as a student in Mathematics. <...> After a certain break because of his military mobilization and participation in the World War I A. Stoyanov graduated from the Mathematical Faculty in 1920, with an excellent higher education diploma. <...> Very soon, he was appointed as an Assistant Professor at the Department of Analytical Mechanics by Prof. <...> In 1927, he attained the academic degree as an Associate Professor at the Department of Analytical Mechanics, and in 1931, he was promoted as a Professor. <...> At the opening ceremony of the first Higher Technical School in Bulgaria, in 1941, in Sofia, Prof. <...> Arkadiy Stoyanov responded to the invitation to give his contribution for the organization of the higher technical education in our country. <...> After winning the competition, A. Stoyanov took up the leadership of the Department of Technical Mechanics. <...> By his great experience of a lecturer and scientist he supported and contributed to the utmost the first higher school of technical sciences, which later on had established itself 92 Проблемы машиностроения и автоматизации, № 3 – 2007 as the State polytechnics, and subsequently – in 1953 had given the beginning of the five technical universities in Sofia: the Technical University, the University of Architecture, Civil Engineering and Geodesy, the Mine and Geological University, the University of Chemical Technology and Metallurgy, and the University of Forestry, which at the very beginning had been founded as higher technical institutes. <...> By his total further activity as the Head of the Department of Technical Mechanics, technical education in our the latter had made much effort in order to adjust the creative and the training activity at the Department <...>