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Information × Registration Number 0220U100716, 0118U005412 , R & D reports Title Methods to registrations and analysis sound to vital activity of the people for the reason identifications of the changes to their source popup.stage_title Head Grinchenko Viktor T., Доктор фізико-математичних наук Registration Date 24-01-2020 Organization Institute of Hydromechanics of NAS of Ukraine popup.description2 The technique of computer recording and analysis of respiratory noises in a wide range of patients' constitutional features and the establishment of statistically significant relationships between them have been developed. The dynamical regularities of the model of interaction between the cardiovascular and respiratory systems are studied, taking into account the dependence of the parameters of the respiratory influence on the characteristics of the cardio interval. Based on the existing models of interaction between the cardiovascular and respiratory systems, a generalized model that takes into account both the direct and inverse relationship of cardiac activity. On the basis of the obtained scientific results the tendencies of pulmonary diseases of patients are quantitatively monitored, which allows to us examine in detail the peculiarities of the patient's respiratory noise in the course of the disease. It was first discovered that accounting for the inverse effect of heart rate on the frequency (phase) of the respiratory oscillations leads to the irregularity of the steady state of the cumulative system. Statistically significant relations between the sounds of vesicular and bronchial breathing of a healthy person were established. A computational algorithm for solving the problems of sound generation by a flow in the respiration channels with stenoses is constructed. This algorithm allows one to numerically simulate the transformation of the flow energy into the sound energy. The algorithm belongs to the class of hybrid methods. The calculations were performed on the cluster supercomputer Scit in the Institute of Cybernetics, NAS of Ukraine. The parallelization was performed on the basis of the geometric parallelism principle. It is shown that in the interstenosis area, the flow generates two sequences of vortices arranged in chessboard order. The dipole sound, which occurs during the interaction of these vortices with the solid obstacles, is dominant. Product Description popup.authors Vovk Igor V. Horodetska Natalija S. Konovalyuk Tetyana P. Krasnopolskaya Tetyana S. Makarenkova Anastasiya A. Malyuga Volodymyr S. Oliynyk Valeriy N. Pechuk Evgen D. Rudnytska Mariya O. Rudnitskiy Olexandre G. Tkachenko Ludmila V. popup.nrat_date 2020-04-02 Close