https://elib.bsu.by:443/handle/123456789/178347 NPCS Vol.20, no.1 (2017), pp. 1-110 2026-04-20T06:28:57Z https://elib.bsu.by:443/handle/123456789/194336 Заглавие документа: Thomas Precession in Some Riemannian Spacetimes Авторы: Silenko, A. J. Аннотация: The tetrad method and the Pomeransky-Khriplovich gravitoelectromagnetic fields are used for an analysis of local Lorentz transformations and the Thomas precession in Riemannian spacetimes. The Thomas precession in some Riemannian spacetimes is calculated. 2017-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/194335 Заглавие документа: Analytic QCD Coupling and the Renormalization Group Evolution of the Structure Function Moments Авторы: Sidorov, A. V.; Solovtsova, O. P. Аннотация: We discuss application of analytic approach called the analytic perturbation theory to the renormalization group equation for evolution of the moments of structure functions. We focus on application of the analytic running coupling to Q 2 evolution of the moments of the structure functions. We apply the results to describe experimental data on the F3 structure function. We have found that the shape of the F3 structure function obtained in our analysis is compatible with the PT result within experimental errors and differs from the result of the fractional version of the analytic approach in high x kinematics region. 2017-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/194333 Заглавие документа: The Genetic Algorithm for Image Encryption Авторы: Sidorenko, A. V.; Shishko, M. S. Аннотация: New image encryption genetic algorithm based on the dynamic chaos has been proposed and implemented as software. The resistance of the algorithm to various types of cryptographic attacks has been examined. The following quantitative parameters of algorithm stability have been determined: information entropy, correlation coefficients between adjacent pixels, number of pixels change rate (NPCR), and unified average changing intensity (UACI). 2017-01-01T00:00:00Z https://elib.bsu.by:443/handle/123456789/194332 Заглавие документа: Formation, Propagation, and Interaction of Nematicons Авторы: Rushnova, I. I.; Melnikova, E. A.; Tolstik, A. L. Аннотация: Conditions for the formation of spatial optical solitons within a planar layer of nematic liquid crystals (nematicons) have been established experimentally; features of solitons propagation and interaction have been studied. It has been shown that the interaction of two nematicons leads to their spatial attraction and merging. Based on the analysis of the shift of one nematicon under the effect of another one, optical control of the nematicon position has been realized due to change in the power of the another. Capturing of low-power light beam into the waveguide channel formed by the nematicon has been implemented. 2017-01-01T00:00:00Z