The methodology of choosing the parameters of strengthening the structural elements of the bearing surfaces of aircraft is presented in the article. Using mathematical methods of deformable solids, a mathematical model of processing elements of aircraft is built, which will be much more resistant to external mechanical impact. To give the surface water-repellent and anti-icing properties, surface treatment with highly concentrated energy flows can be used, followed by its strengthening. Such technologies include laser irradiation, plasma flux, electron beam, light beam, and ion flux. The proposed model is based on the problem of determining the technological parameters of the impact of concentrated energy flow on the surface of the part in order to determine with high accuracy the area of hardening and forecasting of zones of plastic deformation. The precision of determining these parameters is justified by taking into account the problem of dependence of physical and mechanical characteristics of the material on temperature - thermal sensitivity of the material. As these technologies involve significant changes in temperature values, taking into account temperature dependences is an important factor. The proposed methodology of determining the parameters is an actual task and is based on the solution of nonlinear problems, as well as allows you to create more accurate models of physical processes and provides reliability.

The study of the influence of the elemental composition of batteries on environmental parameters has been carried out. The authors propose to predict the states of ecosystem development on the basis of their studies in stationary and dynamic modes, the latter of which is based on the solution of systems of differential equations using the numerical Runge - Kutta method of the fourth order. The methodology of forecasting and modelling situations, mapping sources of risks and monitoring ecological changes allows to develop the corrective measures of ecological catastrophe prevention.

Based on the analysis of the results of the study of the multicomponent composition of waste batteries using an X-ray fluorescence analyser “EXPERT 3L” the indicators of the danger of their multicomponent composition were evaluated and corrected taking into account the proportion of each element of the studied batteries. The article describes the new approach proposed by the authors to assess the impact of multicomponent battery composition on the environment, the peculiarity of which is to determine the resilience of ecosystems on the base of mathematical modelling of the rates of the reactions of formation and removal of individual substances in the system. In particular, quantitative indicators of resilience and loss of natural ecosystems are analysed.

This work presents main approaches to developing a programmable mixed-signal front-end for sensor electronics based on signal transimpedance amplification and integration. In accordance to Internet of Things concept requirements a Programmable System on Chip PSoC 5LP is used for mixed-signal front-end implementation. In comparison to the basic transimpedance amplification and integration circuits, the output voltage of new solution is modulated over the whole voltage range of the power supply. As a result, the enhanced resolution and accuracy of further analog-to-digital conversion are obtained. Simulation and experimental results of parameters investigations have been presented.

Because of the rapid development of new types of light sources and price considerations, effective methods to analyze the characteristics and quality of light sources are required. To solve the problem of certification and standardization of light sources, and continuing of the further research, an automated system was developed that analyzes light characteristics based on input data and calculates the quality mark of the light source based on the obtained results. We have developed two versions of the system. The main version is based on the spectral distribution obtained from the spectrometer and provides a precise instrument for research and certification of light sources. The second one is a mobile version that uses a device camera for getting the light data and allows to evaluate the household light sources. In this paper, we present the description of the developed system and the main methods of light analysis that we implemented.