This paper presents Best Theory Diagrams (BTDs) constructed from non-polynomial terms to identify best shell theories for the free vibration analysis of laminated and sandwich shell. The shell theories have been constructed using Axiomatic/Asymptotic Method (AAM). The refined models are implemented following the compactness of a unified formulation developed. The governing equations are derived from the Hamilton’s Principle. NavierType solution technique is used for solving the eigenvalue problem of simply supported shell. The BTDs use 3D equilibrium solutions as a reference. The BTDs built from non-polynomial functions are compared with Maclaurin expansions. The results are compared with Layerwise solutions. Cylindrical and spherical shells with different layer-configurations are investigated. The results demonstrate that the shell models obtained from the BTD using non-polynomial ter...

Distance education at the present stage of development of the world educational practice has acquired a global character. The range of educational services has significantly expanded; the number of educational organizations and institutions involved in this form of education has increased; a huge number of students use the Internet, gadgets and high-tech services. It has influenced the development of the educational environment around the world. Effective distance education practices are those forms of distance learning that allow students and other students to receive “remote” education via the Internet, if necessary. Such a necessity today has become the epidemiological situation in the world with the spread of infection caused by the coronavirus SARS-CoV-2 (2019-nCoV). The publication describes those practices that have proven to be effective. Their advantages and disadvantages ar...

Distance education at the present stage of development of the world educational practice has acquired a global character. The range of educational services has significantly expanded; the number of educational organizations and institutions involved in this form of education has increased; a huge number of students use the Internet, gadgets and high-tech services. It has influenced the development of the educational environment around the world. Effective distance education practices are those forms of distance learning that allow students and other students to receive “remote” education via the Internet, if necessary. Such a necessity today has become the epidemiological situation in the world with the spread of infection caused by the coronavirus SARS-CoV-2 (2019-nCoV). The publication describes those practices that have proven to be effective. Their advantages and disadvantages ar...