"Доктора наук" is a title in some countries, including Russia and Ukraine, that signifies a high level of academic achievement. It is awarded to individuals who have completed extensive research and have made significant contributions to their field of study. This title is typically pursued after obtaining a PhD and involves the defense of a doctoral dissertation. The process to become a "доктора наук" usually requires several years of research, publication of scholarly articles, and the successful defense of a comprehensive thesis. This title is recognized as a mark of expertise and authority in various disciplines, including science, engineering, and humanities.