Table of Contents


    • Investigation of the general concept of the implementation of automation and digitalization tasks for production processes using innovative high-level solutions

      pg(s) 99-100

      The main issues are considered in this topic: the main problems of the design and implementation of high-level systems for the automation of production processes are considered. As part of the digitalization of production, there is a need for the operational management of all enterprise processes at all levels of the system. The work highlights several recommendations for the development of integration of such systems. The research describes the interoperability of various systems of resource management, processes, laboratory, planning for obtaining quality products.

    • A generalization of approaches to creating a digital passport supporting the stages of the electronic product life cycle and the features of the formation of design decisions based on it

      pg(s) 101-104

      The paper substantiates the need to generalize approaches to creating a digital passport supporting the stages of the life cycle of an electronic product. For this, the results of the analysis of design and production procedures and product data at the stages of the life cycle are presented, on the basis of which the components of a digital passport are formulated as pairs of values “information object – design and production procedure”. Information objects are determined by PDM, ERP, MES, QMS systems and electronic document management systems. The list of design and production procedures is determined by the automated processes of a particular enterprise, which determines the variability of the digital passport. Also, the work substantiates the need for the formation of design decisions and the features of the formation of design decisions based on them are shown. The formation of design decisions is associated with the corresponding tasks formulated in the form of linguistic variables, which allowed to develop the generation of design solutions, according to which their desired version contains the associated components of a digital passport that fall inside the area specified by the values of the linguistic variable. The results obtained can be used in order to create signatures and semantics of applied unified services for a digital passport in the instrument-making industry, used in the development, delivery and maintenance of electronic products.

    • Automated testing framework with browserstack integration

      pg(s) 105-108

      Nowadays ensuring high-quality software product requires a lot of testing efforts. Automated tests in the 21st century are a must. Whether it’s code peer-review, unit, integration, system or exploratory user testing – it all has to be done with given insurance and expertise! Therefore, we look to automate our testing where is conceivable. Most applications today have the equivalent of Web and Mobile versions for the same functionality, but different platforms of action in order to facilitate the users. Therefore, parallel testing of both subtypes is required to provide smooth maintenance and rapidity. Running as many builds as possible, including tests to ensure quality is essential when comes up to reliable software product and agile development. With the implementation of Continuous Integration and Continuous Delivery tools, we guarantee a better way to deploy automated tests across multiple instances and execute them against those environments. BrowserStack is one common cloud solution to these requirements. It is a very powerful tool, which can be attached to our development process. This article explores detailed approach on the automation of cross-browser, device and compatibility testing in BrowserStack platform, using a custom extended automation framework to provide direct configuration output to this environment and give ease in the future Web and Mobile development.

    • Analysis of the noise immunity of quadrature modulation method for turning signal constellations

      pg(s) 109-111

      The paper considers the effect of the rotation of the signal constellation on the noise immunity of quadrature multi-point modulation methods. Based on the error vector in the Matlab + Simulink simulation environment, models of M – QAM modulators and demodulators with rotation of the signal constellations at an arbitrary angle are proposed. Considered the most commonly used in digital data transmission systems modulation: 4-QAM, 16-QAM, 64-QAM and 256-QAM. The simulation results of the proposed models confirmed the coincidence of the values of the rotation angles of the signal constellations recommended by the DVB-T2 standard, and also revealed the
      values of other angles that can be used to improve the noise immunity of multipositional quadrature modulation methods

    • Building personal virtual private networks in public cloud platforms

      pg(s) 112-113

      Virtual Private Networks (VPN) enable usage of the public Internet infrastructure to build se-cure and reliable connections providing functionally of private corporate IT networks. Back in 90s VPN were created to mainly allow access to corporate resources for employees who work remotely and/or travel. Today, VPN can be used to gain access to geographically isolated and highly protected Internet resources like websites, interactive platforms and more. Such VPN are good for protecting Internet users’ privacy and enhance their security especially when using public free Wi-Fi networks. Indeed, now VPN are used more and more and gain popularity for exactly those reasons – provide almost universal access and protect privacy of millions Internet users. This paper reviews building blocks and procedure to build our own VPN. This way power users are in full control of their privacy and security when using public Internet infrastructure while also gain access to otherwise restricted online resources.


    • Solver parameter influence on the results of multilayer perceptron for estimating power output of a combined cycle power plant

      pg(s) 114-117

      Previous work has determined the ability of using the Multilayer Perceptron (MLP) type of Artificial Neural Network (ANN) to estimate the power output of a Combined Cycle Power Plant (CCPP) in which optimization did not focus on the solver parameter optimization. In previous work, the solvers used the default parameters. Possibility exists that optimizing solver parameters will net better results. Two solver algorithm’s parameters are optimized: Stochastic Gradient Descent (SGD) and Adam, with 140 and 720 parameter combinations respectively. Solutions are estimated through the use of Root Mean Square Error (RMSE). Lowest RMSE achieved is 4.275 [MW] for SGD and 4.259 [MW] for Adam, achieved with parameters: = 0.05, = 0.02, and nesterov=True for SGD and with parameters = 0.001, 1 = 0.95, 2 = 0.99, and amsgrad=False for Adam. Only a slight improvement is shown in comparison to previous results (RMSE=4.305 [MW]) which points towards the fact that solver parameter optimization with the goal of improving results does not justify the extra time taken for training.

    • Study of energy parameters in alternative power source microgrid systems with multilevel inverters

      pg(s) 118-121

      Microgrid-systems with alternative energy sources in which multilevel inverters are used are becoming more widespread. Possible circuit implementations of multilevel inverters for thus systems are shown. A comparative analysis of the energy parameters of multilevel inverters using various modulation algorithms is presented. important requirement of multilevel voltage inverters is to ensure high quality output voltage, as well as ensuring minimum power loss and maximum efficiency. An overview of known modulation algorithms for output voltage generation in multilevel inverters is presented. The analysis of existing algorithms was performed and the choice of the optimal algorithm for use in the scheme of solar power plants was carried out.

    • Magnetothermal finite element model of a new two-coil crucible induction furnace through the altair flux3d® software

      pg(s) 122-125

      A new two-coil cylindrical crucible induction furnace with the lateral coil connected to the one-phase electric power supply and the bottom coil connected to a capacitor bank with an appropriate value of the capacity is able to realize a desired balance between the diffusion of the power induced in the furnace bath through the lateral and the bottom faces of the crucible. Finite element magnetothermal model of the furnace is used to compute the temperature field, the thermal losses and the thermal efficiency associated with the furnace operation and to study three variants with the same bath volume of the new furnace related the diameter of the furnace bath,.

    • Control approaches of pem fuel cells: a review

      pg(s) 126-131

      Over the last two decades, polymer electrolyte membrane fuel cell technology has been increasing its share in power generation systems. In this work, the basic polymer electrolyte membrane fuel cell (PEMFC) system operation is presented first. Some most controloriented modeling approaches are reviewed as the model is essential for further control. Optimal control of such a system can improve efficiency and hence reduce the cost of ownership. The objective of this work is to present the concept of control and depict some of the possible applications of PEMFC systems


    • The organizational concept of the virtual corporation and its integration into Industry 4.0

      pg(s) 132-137

      Examining the effects of the technological components of Industry 4.0 on the structure of companies, one is reminded of an organizational concept that was popular at the turn of the Millennium: the Virtual Corporation (VC). As early as 1993, the American authors William Davidoff and Michael Malone proclaimed the “virtual revolution”. For them, the decisive building block for the formation of a new economic system was the Virtual Corporation. The literature attributed to this concept the ability to solve the problems of large companies (such as inflexibility) and small enterprises (such as poor economies of scale) simultaneously and to combine the best features of both extremes of company size. This article discusses, which prerequisites for the implementation of VC, then mostly dreams of the future, are given today and how the concept of the VC can complement Industry 4.0 and serve as a role model on an organizational level.

    • Changes of human resource management in the context of impact of the fourth industrial revolution

      pg(s) 138-141

      Fourth industrial revolution also called Industry 4.0, is considered as the most discussed topics among experts nowadays. The excitement for the Industry 4.0 goes two ways. First says that the fourth industrial revolution deals with the question of “a priori” and not “ex-post”. Organizations and research institutions gain opportunities for active building and forming of the future. Secondly, it has significant economic impact, which promises much higher operational efficiency, as well as development of brand-new business models, services and products. At the moment, organizations are able to run without elements of the Industry 4.0, but only for a limited time. They have to look for a path of further development, and that is digitalization in each field of business. With help of human resource management, organizations are able to form skills, abilities, behaviour and attitude of employees in order to achieve the targets of organization. Human resources represent significant factor for competitive advantage in the knowledge economy. In the Industry 4.0 considering human resource management, managers have to mainly focus on supporting of innovation and learning in the organization. The main goal of this article is to identify changes in methods and techniques during realization of human resource management in the context of the impact of fourth industrial revolution in theory, based on research of available scientific literature. Attention is mainly focused on selected functions of human resource management like job design, staffing, training and performance appraisal


    • Information-measuring system for monitoring the sanitary condition of tree stands

      pg(s) 142-147

      The article presents the results of the development of an information-measuring system for monitoring the sanitary status of tree stands. The main purpose of such a system is to minimize the impact of the operator on the results of monitoring the sanitary status of tree stands by indirectly controlling the quality characteristics of the tree sap (by establishing the dependence of these characteristics on climatic factors) with the possibility of remote monitoring and control of the process of express control. The developed monitoring system allows to conduct a contactless (remote) survey of sensors, which are recorded in close proximity to the root system of selective trees from an array of tree plantations, and further, by mathematical treatment of climatic characteristics (acidity and salinity index, air temperature) zoning temperature health status. The system also allows you to predict the dynamics of extending the areas of tree planting. This enables those responsible for tree planting to take preventative measures to prevent such droughts. The main advantage of the developed information measurement system is its complete computerization, which eliminates a number of external subjective influences by the operator or the responsible person (necessity of visual inspection of the maximum number of trees in the array, erroneous perception of visual information, etc.). This, in turn, avoids systematic methodological errors, thereby improving the accuracy, speed and reliability of the monitoring and control results of this system.

    • Online education models’ comprehensive analysis

      pg(s) 148-150

      Nowadays online learning is among the most progressive and most popular educational practices in the world. Both European and United States universities try to implement this way of learning into the educational process. Several models of online education are used in the world’s practice. The article aims to analyze online learning models to find a way for the best implementation in higher education based on Ukrainian educational system during COVID 19 pandemic in 2020.