This collection of articles is based on the results of XCVIII International Scientific Readings (memory A. C. Popova), held on January 8, 2021 . in g. Moscow . In the published materials of the conference, topical issues of science, education and practice of applying the results of scientific research in Russia and the world are presented and considered . Proceedings of the conference cover a wide range of scientific fields. The published works are of great value for scientific and pedagogical workers , Teachers , Post-graduate students , Graduates and Students , Young scientists , Research and Development , as well as for other specialists for the purpose of use in scientific work , pedagogical and educational activities All articles are peer-reviewed , stylistic and editorial editing . The point of view of the editorial board does not always coincide with the point of view of the authors of the published articles. Articles submitted by author. Responsibility for the accuracy of citations, names, names and other information, as well as for compliance with intellectual property laws is borne by the authors of the published materials. When reprinting the materials of the collection of articles of the International Scientific and Practical Conference, a reference to the collection of articles is mandatory.