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International Scientific and Practical Conference
"Electronics and Information Technologies"
| Issue 10, Pages: A-1-A-3 |
| DOI: https://doi.org/10.30970/elit2018.A01 |
| Mathematical Modeling of Nonlinear Dynamic Processes in Information Technologies of Mathematics |
| G. Vostrov, R. Opiata |
| The variety of unsolved mathematical problems is analyzed. It is shown that unsolved problems in the theory of numbers severely limit the further development of mathematical science in both theoretical and applied aspects. The foundations of experimental mathematics are formed as a tool for constructing information technologies in pure and applied number theory. On the basis of Artin’s hypothesis, a generalized hypothesis is formed and shown as a means of non-linear dynamical processes to obtain a sufficiently accurate solution of it |
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| Issue 10, Pages: A-8-A-10 |
| DOI: https://doi.org/10.30970/elit2018.A03 |
| Using Software for Digitizing and Visualizing Well Logging Data for Modelling in Geology |
| Yu. Vikhot |
| Well logging is important for a detailed restored of the features of the geological structure of the investigation area drilled by wells. Logs are divided into geological and geophysical. Well logging identifies the lithology, location of fractures on depth, and record the important physical parameters (temperature, pressure, gamma, neutron, resistivity etc.). Specialized software for digitizing and visualizing well data is necessary for qualitative well logging interpretation. Interpretation of well data are needed for geological modeling, construct 2D profile and 3D model, oil and gas industry, etc |
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| Issue 10, Pages: A-11-A-14 |
| DOI: https://doi.org/10.30970/elit2018.A04 |
| Method of Using Dual-Booting and Multi-Booting of Microsoft Windows Family Operating Systems on External System Drive |
| V. Kostogriz |
| Computer’s operating system in generally installed on its internal SSD (HDD). When user boot computer, the BIOS loads the boot loader from the internal SSD and the boot loader boots the installed operating system. A boot loader is a computer program that loads an operating system or some other system software for the computer after completion of the power-on self-tests. A boot loader is loaded into main memory from persistent memory. On modern general purpose computers, the boot up process can take tens of seconds, or even minutes, and typically involves performing a power-on self-test, locating and initializing peripheral devices, and then finding, loading and starting an operating system. Booting is complete when the normal, operative, runtime environment is attained. Dual-booting is a technique which allows a single physical computer to run two operating systems. Multi-booting allows to the common configuration of multiple operating systems on computer, and ability to choose which operating system to boot. I have Implemented method of using dual-booting and multi-booting based on the external SSD system drive. |
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| Issue 10, Pages: A-15-A-18 |
| DOI: https://doi.org/10.30970/elit2018.A05 |
| Development of Intellectual Tomographic System of Ultrasonic Diagnostics of Materials |
| G. Romanyshyn |
| The principles of development an intellectual tomographic system of ultrasonic diagnostics of materials damage on the basis of registration of the backscattered signal are considered. The model of propagation of elastic waves in a scattering medium is given in the form of an inhomogeneous Lame equation with variable coefficients. The procedure of constructing successive approximations to the solution of the considered model in the case of slowly variable parameters is presented. The expression of backscattered tomography is considered. An algorithm for processing of backscattered signal is presented. The results of UML-modeling and intellectual system structure diagram are presented. |
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| Issue 10, Pages: A-19-A-20 |
| DOI: https://doi.org/10.30970/elit2018.A06 |
| Parallel Calculations on Raspberry Pi |
| O. Babych, O. Chuprynskyi, V. Galin |
| The article deals with the usage of Raspberry Pi as a low-cost computing cluster in order to decrease the cost of the energy consumption and the power of a computer. The example of the cluster is built on two processors from Raspberry Pi 3 and the Python 2 programming environment is used. |
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| Issue 10, Pages: A-21-A-23 |
| DOI: https://doi.org/10.30970/elit2018.A07 |
| Visualization 3D Augmented Reality |
| L. Demkiv, V. Romaniv |
| Explored technologies of augmented and mixed reality, libraries for working with these technologies. A comparison of augmented reality with adjacent technologies such as virtual and mixed reality has been performed. A client application for the Android operating system on the Unity 3D gaming engine, as well as the server part on Node.js, has been developed using the MongoDB database management system. Created application AR Assistant used for additional information and 3D-models according to the marker reader |
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| Issue 10, Pages: A-34-A-37 |
| DOI: https://doi.org/10.30970/elit2018.A11 |
| Towards Creating Innovation Hub in IT- Strategy for Entrepreneurship Education at Ivan Franko National University of Lviv |
| I. Katernyak |
| Our strategy suggests developing Entrepreneurship Education (EE) together with eco-system for startups in the region. This requires: shared understanding of the need for EE among the key stakeholders and encouraged collaboration on establishing an Innovation Hub as IT Startup Accelerator; find and activate champions and establish implementation mechanisms to carry out strategies and policies through a set of coherent programmes; formulate and pilot entrepreneurship course with involvement of business experience, interactive teaching methods; expand via more advanced courses and help business angels to meet with talented students and graduates. IT Startup Accelerator “Innovation Hub” is to be created at the institutional level with the mission to provide support for idea development into a business concept, to invite business angels and venture capitalists for IT startups. |
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| Issue 10, Pages: A-38-A-40 |
| DOI: https://doi.org/10.30970/elit2018.A12 |
| Golang Multithreading |
| M. Bavdys |
| In the thesis the issues of development of microservices on the basis of object-oriented design are considered. The peculiarities of creating the layers of logic were described. The methods of research and implementation of the information system for the development of software products for the system on the basis of microservices in the style of object-oriented design have been analyzed, namely: the requirements to the information system; the database structure; the layer structure; architecture of microservice; the structure of the administrative part of the system; the description of the restriction of access to data. The work is based on the Golang language. The coursework contains the following sections: basic concepts of development tools, description of the project, project testing. In the course of the work, conclusions and suggestions were made on improving the development of information systems and the use of micro-service architecture development tools in the style of object-oriented design to achieve the set goals. |
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| Issue 10, Pages: A-41-A-44 |
| DOI: https://doi.org/10.30970/elit2018.A13 |
| Synthesis Method and FPGA Realization of Quasi-barker Codes |
| I. Tsmots, O. Riznyk, V. Rabyk |
| The paper considers the method of obtaining quasi-Barker codes based on numerical ruler-bundles. Their advantages, basic parameters and areas of application are given. The algorithm is implemented on FPGA EP3C16F484N6 of Altera firm. The functional diagram of the DS-SS system using quasi-barker codes is presented, Quasi-Barker codes generator, implemented in VHDL language and its simulation in frequency domain was described. |
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| Issue 10, Pages: A-45-A-48 |
| DOI: https://doi.org/10.30970/elit2018.A14 |
| Quantum Computing (I.Quantum bits, gates and circuits) |
| I. Bolesta, O. Kushnir, S. Velhosh, Yu. Furgala |
| Using the formalism of the Boolean algebra, the process of computation in quantum computers is analyzed. The description of quantum bits - qubits - in the Hilbert space is given, quantum logic elements, quantum networks and the structure of an ideal quantum computer are considered. Peculiarities of quantum mechanical calculations related to the superposition principle, the interference of complex amplitudes and the existence of entangled states are discussed. |
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| Issue 10, Pages: A-49-A-51 |
| DOI: https://doi.org/10.30970/elit2018.A15 |
| Quantum Computing. (II.Quantum Computer Languages) |
| I. Bolesta, O. Kushnir, S. Velhosh, Yu. Furgala |
| The programming languages that can be used to write the program code when using quantum computers are reviewed. The prospects of using such languages from the point of view of integrating them into software complexes that are convenient for the developer are discussed |
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| Issue 10, Pages: A-52-A-53 |
| DOI: https://doi.org/10.30970/elit2018.A16 |
| Empirical Aspect of Scientific Research in the Discipline "Electronics and Circuit Design" |
| S. Rendziniak, V. Korud, R. Kvit |
| The innovation of elements of scientific research into the educational process using hybrid laboratories is considered. The experimentation methodology of a laboratory workshop in a computerized laboratory on the theory of electric and electronic circuits, which uses problem situations, is proposed. At the same time, the effectiveness of the educational process increases and the attainments of scientific research of phenomena and processes are developed. |
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| Issue 10, Pages: A-54-A-56 |
| DOI: https://doi.org/10.30970/elit2018.A17 |
| Parameterized Archimedean Triangular Norm |
| R. Vorobel, O. Berehulyak |
| The use and construction of triangular norms as the basic part of logical connectives of fuzzy systems is considered. Herewith, the transformation of functions which use the Lambert W-function and its inverse is taken for the basis. To expand the functional characteristics of the constructed new triangular norm, its parametrization is applied. This provided a possible change in the hyper-surface of the triangular norm within wide limits. It is proved that the proposed function satisfies the requirements of such axioms as commutativity, associativity, monotonicity and boundary conditions. Proposed parameterized triangular norm is of a strict and Archimedean type. |
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| Issue 10, Pages: A-57-A-60 |
| DOI: https://doi.org/10.30970/elit2018.A18 |
| Use of Color Histograms for Image Identification |
| Yu. Furgala, A. Velhosh, B. Rusyn, Yu. Korchak |
| The paper analyzes the possibility of using color images’ histograms formed in the color spaces HS* for images distinguishing by their content. It has been established that the use of H-histograms allows you to successfully recognize an image when its size is changed 128 times and does not depend on the aspect ratio of the image. |
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| Issue 10, Pages: A-65-A-68 |
| DOI: https://doi.org/10.30970/elit2018.A20 |
| Creating a Face Editor Using Kinect 2.0 |
| V. Grabovskyi, O. Martynovych |
| This paper presents the results of the creation software on Kinect 2.0 basis that is intended to develop a 3D model of the face, simulate various situations and problems that arise during its creation, and consider some tools and methods for their solution. The possibility of correct setting of the original face image to its 3D model and the factors influencing the accuracy of this process are analyzed. |
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| Issue 10, Pages: A-73-A-80 |
| DOI: https://doi.org/10.30970/elit2018.A22 |
| Influence of Unique Words on the Performance of Corpus-Based Keyword Detection Methods |
| O. Kushnir, V. Yaremkiv, I. Dovhan, A. Kashuba |
| We study the performance of corpus-based key¬word detection methods, including TF-IDF, in a particular case when a text under investigation contains unique words, which are absent or rare in the other texts of corpus. The two points are subjects of our main attention, the quality of keyword list and propriety of the corresponding keyness scores, as well as criticality of the methods to small perturbations of the corpus. We conclude that a number of heuristically introduced TF-IDF-like measures compete quite successfully with TF-IDF in their performance but, on the other hand, they cannot cope with the problem of criticality of their scores inherent to the unique words |
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| Issue 10, Pages: A-81-A-84 |
| DOI: https://doi.org/10.30970/elit2018.A23 |
| Evaluation Methods in Systems Research |
| O. Polishchuk |
| Purpose, subject and main problems of complex dynamical systems evaluation are described. Methods of versatile deterministic evaluation based on local, forecasting, aggregated, and interactive analysis of the state, operation quality, and interaction of complex hierarchical network system’s elements on the all hierarchical levels are proposed. |
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| Issue 10, Pages: A-88-A-91 |
| DOI: https://doi.org/10.30970/elit2018.A25 |
| Data Processing for Scanning Tunneling Spectroscopy Analysis of Metal and Semiconductor Areas in Nanoscale |
| T. Nenchuk, P. Galiy, Ya. Buzhuk, K. Korvats’ka |
| Algorithm for sequential actions and calculations is proposed, which yields the current-voltage curves (CVC) from the matrix of experimental data acquired by scanning tunneling spectroscopy analysis of metal-semiconductor planar systems. CVCs’ study in the vicinity of a zero-bias voltage range that corresponds to the width of the band gap of a semiconductor allows to expand the capabilities of existing software data processing systems and to increase the planar resolution and accuracy of determining the relative concentrations of metal and semiconductor on a nanoscale by means of a scanning tunneling microscope. To implement the analysis algorithm, a program has been developed with a user-friendly interface and the ability to visualize the data and to calculate the relative concentrations of the metal and semiconductor. |
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| Issue 10, Pages: A-92-A-95 |
| DOI: https://doi.org/10.30970/elit2018.A26 |
| Determination of Regression Parameters for the Thermal and Energy Components of Smart Homes |
| O. Sinkevych, L. Monastyrskyi, B. Sokolovskyi |
| Determination of the regression parameters of different data sets which consist of the thermal and energy components of smart homes is carried out. Analyzed data were automatically gathered by installed sensors under UK REFIT Smart Home project and published for an open access. In order to carry through the statistical analysis of the given data, the research stages have been divided into three steps. Firstly, the given data have been stored into a specially developed sqlite database. Secondly, the data prepossessing (cleaning, smoothing and resampling) and visualizing have been provided using Python libraries (pandas, seaborn, matplotlib). Then, the cleaned and smoothed data have been used for the statistical regression analysis within which different hypotheses of relations have been investigated. Conducted study of the thermal and energy components of the data has shown a suitability of such data for a forecasting and formulation of the inverse problem of determination of the smart home thermophysical parameters |
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| Issue 10, Pages: A-96-A-97 |
| DOI: https://doi.org/10.30970/elit2018.A27 |
| Grid Calculations in the Field of High-Energy Physics |
| O. Dyomin, S. Barannik, A. Alkin |
| This article is devoted to distributed calculations of experimental data of high energy physics experiments. A role of Grid infrastructure and virtual organizations is considered. GEANT4 as a distributed package for HEP experiment modeling is inspected. A pilot training course on the use of Grid technologies for computing physical tasks was created in the framework of virtual organization HEP |
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| Issue 10, Pages: A-98-A-101 |
| DOI: https://doi.org/10.30970/elit2018.A28 |
| Comparison of Multi-Object Recognition Models |
| V. Parubochyi, R. Shuvar |
| The multi-object recognition on the single image is one of the most difficult issues of the object recognition. However, this particular model of the object recognition is best suited to the requirements of a large number of application systems. The paper analyzes the main aspects of the multi-object recognition, examines the problems of the multi-object recognition and the ways of their solution. Comparison of the basic approaches to the multi-object recognition is realized, and the possibility of adapting these approaches to different types of recognition systems is analyzed. |
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| Issue 10, Pages: A-106-A-109 |
| DOI: https://doi.org/10.30970/elit2018.A30 |
| Use of Parallel Computing for Images Processing |
| R. Kovtko, S. Grydzhan, R. Shuvar, A. Prodyvus |
| The method of parallel program realisation for raster image processing in a mobile application is considered. The principle of developing an application in the iOS system is proposed. Developed iOS application for raster image processing. The influence of multithreading on the speed of data processing is investigated. |
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| Issue 10, Pages: A-110-A-112 |
| DOI: https://doi.org/10.30970/elit2018.A31 |
| Choosing the Optimal Parameters of the Gaussian Filter for Obtaining the Surface Relief Components |
| I. Stasyshyn, Yu. Kotsiuba, L. Muravsky, T. Voroniak |
| It is known that for the determination of mechanical, corrosive and tribological parameters, such terms as "roughness" and "waviness" are often used. Filtering in the frequency domain is used to extract these components from the total relief. In this paper, we propose an approach for determining the optimum value of the cut-off frequency for 2D Gaussian filter, for our method of retrieving the surface relief by three-step phase-shifting interferometry with an arbitrary phase shift of the reference beam. |
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| Issue 10, Pages: A-117-A-120 |
| DOI: https://doi.org/10.30970/elit2018.A33 |
| Factorization Algorithm Based on the Elliptic Curves Theory |
| G. Vostrov, I. Dermenzhy |
| In this article elliptic curve theory and its applications are considered. Much attention was paid to the possibility of composite numbers factorization problem solving by using the theory of elliptic curves. The Lenstra’s method was analyzed and described in detail. The ways of its optimization were given. Algorithm’s software implementation is developed. |
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| Issue 10, Pages: A-121-A-123 |
| DOI: https://doi.org/10.30970/elit2018.A34 |
| Computer Modeling of Dynamic Processes for the Formation of a Set of Primitive Roots in a Set of Primes |
| G. Vostrov, I. Yakshyn |
| The problem of calculating the set of all primitive roots of an arbitrary prime number is considered. The algorithm for checking the natural number by the property of being the primitive root of a given prime number is constructed. The properties of the structures of recursive cycles of primitive roots are investigated. It is proved that all primitive roots of any prime number form pairs in which the recursive cycle of one is the inverse of the recursive cycle of the other element of the pair. The possibilities of representing recursive cycles in two-dimensional space are investigated. It is shown that recursive cycles are form dynamic processes. |
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| Issue 10, Pages: A-124-A-126 |
| DOI: https://doi.org/10.30970/elit2018.A35 |
| Computer Modeling of the Turbulent Natural Gas Combustion in a Cyclone-Calciner Furnace |
| R. Havryliv, V. Maystruk, I. Kostiv |
| The aim of this study is a computer modeling of the natural gasturbulent combustion in an industrial cyclone-calciner furnace. Computer modeling is performed by using Ansys Fluent computational fluid dynamics software with Reynolds-averaged Navier-Stokes (RANS) turbulence model coupled with Eddy-Dissipation concept (EDM) and discrete ordinates radiate heat transfer model. Modeling results are compared with experimental data and it’s shown the influence of the mixing rate constant of Eddy-Dissipation model on the flame temperature peaks in the furnace domain. Based on the presented results, the practical recommendations have been developed for the ANSYS Fluent software package application to industrial combustion process simulation in cyclone furnace. |
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| Issue 10, Pages: A-127-A-129 |
| DOI: https://doi.org/10.30970/elit2018.A36 |
| Experimental and FEM Calculation of Spectral Characteristics of Near-surface Layers under the Seismic Station "Uzhgorod" |
| B. Kuplovskyi, T. Brych |
| The purpose of this work is to calculate theoretical transfer characteristics of the sedimentary layers under the seismic station of the Carpathian seismic network “Uzhgorod” by finite element method. These results will be used for comparison with the dynamic parameters of the near-surface layers obtained experimentally. Based on the correlation of the resonance properties obtained by these methods, the possibility of their use in regional seismological studies was substantiated. In this work, the simulation was carried out by solving the direct dynamic seismic problem by the finite element method. Using the developed wave field simulation technique, oscillations for models of the seismic section under the «Uzhgorod» station were investigated. According to the simulation results for this seismic station, theoretical spectral relations were calculated. The results obtained by the experimental and model methods showed identical behavior throughout the frequency range. According to these graphs, a stable source of noise within the city was allocated. The knowledge about the dynamic parameters of the upper sediment layers under the seismic station, which are the largest filter of oscillation frequencies in the spectral range, will allow more accurate interpretation of registered by this station occurrences. The calculated spectral ratios give a possibility to estimate the degree of environmental influence on station’s seismic signals recording, which will be the largest at frequencies corresponding to the received resonance maxima and minima. These results should be taken into account when evaluating the parameters of possible seismic effects on the territory. |
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| Issue 10, Pages: A-130-A-133 |
| DOI: https://doi.org/10.30970/elit2018.A37 |
| Simulation Quadrocopter’s Catastrophic Landings |
| B. Blagitko, Yu. Mochulsky, I. Zajachuk |
| By means of mathematical modeling, the main features of emergency landing of quadrocopter are determined. The results of simulate of the quadrocopter landings in cases of failure of one of four pairs of electric motor screw are given. The methods of safe landing of an unmanned quadrocopter in case of failure of one of four pairs of motor-screw are proposed. The basis of the proposed methods is to use a parachuting effect. Parachuting achieved by forced off the power of the motor, which is located at the opposite end of the same yoke as faulty motor As a result, the vertical speed of the quadrocopter at the time of landing significantly decreases in comparison with the speed of free fall. |
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| Issue 10, Pages: A-137-A-140 |
| DOI: https://doi.org/10.30970/elit2018.A39 |
| Analysis of Theoretical Models for Nonlinear Fitting of Experimental Data: Dielectric Permittivity of Pb4.95Ge3O11 Crystals |
| Yu. Klymovych, A. Kashuba, O. Kushnir |
| We implement nonlinear fitting and select the best theoretical model for description of experimental data, basing on the programming language Java. This is achieved using the Levenberg–Marquardt algorithm and the bootstrapping for determining confidence intervals for the fitting parameters. The main technical procedures are illustrated on the temperature dependence of dielectric permittivity of non-stoichiometric LG crystals in their paraelectric phase. Our results confirm that the model incorporating a temperature-independent dielectric background and a normal spatial distribution of Curie points assumed for the case of diffused phase transitions can be used as a statistically significant hypothesis. |
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| Issue 10, Pages: A-141-A-144 |
| DOI: https://doi.org/10.30970/elit2018.A40 |
| Development a Software with Augmented Reality Using Unreal Engine 4 |
| V. Kushnir, B. Koman, R. Shuvar |
| We are live in a time where technology take a big part in our life. To use technology we need to interact with them using interfaces. There are a lot of hardware manipulators like keyboard, joystick, microphone and programm manipulators like button, textfield, media player, etc. But one of the most interesting is augmented reality. It help us to develop not just a simple application or a game but an application that interacts with a whole real world and opens user a new beautiful mix of real and virtual world. |
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| Issue 10, Pages: A-147-A-150 |
| DOI: https://doi.org/10.30970/elit2018.A42 |
| Optimization of Transport Routes by Fuzzy Logic Methods |
| I. Olenych, Yu. Nechypor, Yu. Olenych, A. Gukaliuk |
| The fuzzy inference system of the Sugeno’s type with four inputs and one output for the choice of optimal routes of the transport network is proposed in the work. The developed system involves the formation of a fuzzy production rules base, the fuzzification of the input parameters values, the aggregation of the sub-conditions truth of each rule, activating the conclusions and defuzzification the output variable. An algorithm for finding quantitative values of coefficients that corrects the weight of the graph edges in optimization problems under qualitative or approximate input data conditions is implemented. The proposed model of main roads of Ukraine network takes into account the condition of the road surface, the caution of transportation of cargoes, the traffic level and urgency of delivery during the formation of transport routes, which can improve the efficiency of the logistics system. |
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| Issue 10, Pages: A-151-A-154 |
| DOI: https://doi.org/10.30970/elit2018.A43 |
| The Optico-Geometrical Analysis of the Planar Waveguides and Modulators |
| I. Polovynko |
| In this study, the analysis of transverse resonance and modulations effects in an optico-geometrical description of waveguides, is considered. The expression for calculation of the propagation angle of waveguide modes and verios parameter of modulators are programmed. Calculations are done for symmetric waveguides made of gallium arsenide and lithium niobate . Apart from different refraction indices, the programme allows to register waveguide thickness, mode order and radiant wave length. The programme is created on C++ and C# in the Embarcadero and MS Visual Studio 17 programming environment. |
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| Issue 10, Pages: A-159-A-162 |
| DOI: https://doi.org/10.30970/elit2018.A45 |
| Properties of Anisotropic Interaction of the Incommensurate Superstructure as Described by Dziloshinsky’s Invariant |
| S. Sveleba, I. Katerynchuk, I. Kunyo, I. Karpa |
| BDF method was applied for calculation of phase portrait of incommensurate superstructure with the Dziloshinsky’s invariant. The Python language was used to create the correspond application. The value of the parameter of the anisotropic interaction is determined by the number of existing harmonics of the IC of the modulation wave. The contribution of anisotropic interaction in the dynamics of the IC superstructure grows if numbers of harmonics of the IC modulation are growing. According to the received attractors, this system is less stable at lower values of n. |
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| Issue 10, Pages: A-165-A-168 |
| DOI: https://doi.org/10.30970/elit2018.A47 |
| Methodological Error of Angle Measurement by Artillery Sound Ranging System |
| R. Kochan, B. Trembach, O. Kochan |
| The methodology of artillery sound ranging devices, adopted by the Armed Forces of Ukraine, is analyzed. The mathematical model, which describes the dependence of methodological error of measuring the angle of the direction to target measured by sound ranging, is developed. Analyzes of this model provides the dependence of methodological error from distance to target and orientation of acoustic base. |
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| Issue 10, Pages: A-173-A-174 |
| DOI: https://doi.org/10.30970/elit2018.A49 |
| Intersection Control Model for Connected Vehicles |
| A. Klimovich, V. Shuts |
| In the modern world, intelligent transportation systems, such as driverless and connected vehicles, are rapidly developing. Introduction of these technologies to the mass market will lead to the new generation of efficient and safe traffic control systems. We present a traffic control model for isolated intersection, which uses advantages of autonomy and connectivity of vehicles to achieve better throughput. Model is based on usage V2I-communication between vehicles and intersection controller to improve efficiency due to more complete traffic flow information and possibility to give orders to separate vehicles. |
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| Issue 10, Pages: A-175-A-178 |
| DOI: https://doi.org/10.30970/elit2018.A50 |
| The Development of Information Technology of Biometric Protection with an Image Filtration Based on Ateb-Gabor |
| M. Nazarkevych, Ya. Voznyi, H. Nazarkevych, I. Maslanych |
| An overview of the systems of biometric protection with image filtering is carried out. Dactyloscopic recognition method takes half of the market access systems. Filtering is based on the developed Ateb-Gabor filter. Good recognition rates are achieved by filtering the papillary lines texture. The best results can be obtained when the direction and frequency of papillary lines are taken into account. For this biometric image is subject to adaptive alignment of histograms, calculation of the local orientation of the image, image frequency and filtration of the Ateb-Gabor. The generalized Ateb-Gabor filter, based on periodic Ateb-functions and Gabor filters, is developed. Ateb-Gabor filtering allows you to use more flexible and multivariate image management. This will allow you to apply many changes to one image to solve the identification problem. The software is developed by Python. |
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| Issue 10, Pages: A-179-A-182 |
| DOI: https://doi.org/10.30970/elit2018.A51 |
| Application of Convolutional Neural Networks in Biometric Identification Problems |
| L. Monastyrskyi, Ya. Boyko, V. Lozynskyi, T. Kropyvka |
| The prototype of a neural network system of biometric identification based on fingerprints using a convolutional neural network is implemented. An important feature of the proposed methodology is the use of a very limited set of biometric data to train the neural network. The results of the calculations show that the use of carefully selected neural network hyperparameters and data augmentation methods makes it possible to apply the developed prototype for practical purposes |
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| Issue 10, Pages: A-183-A-185 |
| DOI: https://doi.org/10.30970/elit2018.A52 |
| Application of the Thurstone Model |
| S. Vasiunyk, I. Katerynchuk, S. Sveleba, I. Kunyo |
| Thurstone model was analized evaluation of expert information. The inputs for evaluation are matrices of pairwise comparisons created by experts in the evaluated area. To solve the received after processing input data of the system of equations, the method of least squares is used. After solving the system of equations, the mathematical expectation for each of the evaluated objects is obtained, the higher the mathematical expectation, the better object according to the given criteria in the opinion of the polled experts. |
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| Issue 10, Pages: B-1-B-4 |
| DOI: https://doi.org/10.30970/elit2018.B01 |
| Ab initio Calculations of YAlO3 and ABO3 Perovskite (001), (011) and (111) Surfaces, Interfaces and Defects |
| R. Eglitis, A. Popov |
| We performed first-principles calculations for technologically most important ABO3 perovskites, such as, CaTiO3, SrTiO3, PbTiO3, BaTiO3, SrZrO3 and PbZrO3 (001), (011) and (111) surfaces, interfaces and bulk F-centers. For ABO3 perovskite neutral (001) surfaces, in most cases, all upper surface layer atoms relax inward, whereas the all second surface layer atoms relax outward, and again, all third surface layer atoms relax inward. The relaxation pattern for YAlO3 charged (001) surfaces is quite different from ABO3 perovskite neutral (001) surfaces. The ABO3 perovskite (001) surface energies are almost equal for both AO and BO2-terminations, and always considerably smaller than the (011) and especially (111) surface energies. Systematic trends in BaTiO3, SrTiO3, SrZrO3 and PbZrO3 bulk F-center calculations are analyzed. |
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| Issue 10, Pages: B-5-B-8 |
| DOI: https://doi.org/10.30970/elit2018.B02 |
| Transformation of Nanostructured Voids in the Crystallized GeS2-Ga2S3-CsCl Glasses |
| H. Klym, A. Ingram, I. Karbovnyk, O. Shpotyuk |
| Transformation of voids in crystallized (80GeS2-20Ga2S3)100-x(CsCl)x, x = 0; 5; 10; 15 chalcogenide glasses was studied by positron annihilation lifetime spectroscopy. The CsCl content in GeS2-Ga2S3 glassy matrix changed the defect-related component in positron lifetime spectra and confirmed the structural void agglomeration in comparison with the base glass. A larger amount of CsCl in (80GeS2-20Ga2S3)85(CsCl)15 glass resulted in void fragmentation due to loosening of the structure. |
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| Issue 10, Pages: B-9-B-12 |
| DOI: https://doi.org/10.30970/elit2018.B03 |
| Anisotropy of the Absorption of the Photon Ionizing Radiation by YAlO3: Mn Dosimetric Detector |
| O. Buryy, S. Ubizskii, V. Chumak, O. Bakhanova |
| The dependence of the absorption of photon radiation on the spatial orientation of the YAlO3:Mn cube-shape dosimetric detector is investigated. It is shown that at high enough values of the edges length and/or the attenuation coefficient the relative difference of the doses absorbed at different spatial orientations can reach the value about 0.73. Taking into account the energy dependence of the attenuation coefficient of YAlO3:Mn, it is shown that the measurement error not higher than 5% can be ensured in the photon energy range above 0.4 MeV for the sensitive element of dimensions between 1 and 10 mm. |
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| Issue 10, Pages: Àíãë³éñüêà-B-13 |
| DOI: https://doi.org/10.30970/elit2018.B04 |
| Optical Absorption and Luminescence Spectra of the Ag-CdI2 Photosensitive Heterosystem |
| V. Lesivtsiv, S. Velhosh, I. Novosad, S. Novosad |
| This work deals with the study of absorption and luminescence spectra of Ag-CdI2 photosensitive heterosystem and the influence of laser radiation on the spectral properties investigated system. In Ag-CdI2, additional absorption bands are found. Absorption with maxima at 400-500 nm is associated with surface plasmon resonance in silver nanoparticles, which are formed at the initial stages of metal sputtering. From the analysis of the parameters of the spectrum it is established, that silver particles have a spheroidal shape, with the ratio of the axes c/a |
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| Issue 10, Pages: B-17-B-19 |
| DOI: https://doi.org/10.30970/elit2018.B05 |
| The Influence of Chromium Impurity on the Spectral Characteristics of ZnWO4 Crystals |
| S. Novosad, L. Kostyk, I. Novosad, M. Rudko |
| The absorption, excitation, and emission spectra under photo- and X-ray excitation of ZnWO, ZnWO4:Cr3+ zinc tungstate crystals have been investigated. The charge trapping and the radiative thermally stimulated recombination processes in ZnWO4 involve six trapping states at at 107, 129, 152, 170 K and 200, 235 K. The activation energies of traps which are responsible for appearance of TSL in the region 80-300 K were estimated. |
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| Issue 10, Pages: B-20-B-23 |
| DOI: https://doi.org/10.30970/elit2018.B06 |
| The Conductivity and Photoelectric Properties of β-Ga2O3 Thin Films |
| O. Bordun, B. Bordun, I. Kukharskyy, I. Medvid |
| Conductivity, photoconductivity and luminescence properties of β-Ga2O3 thin films deposited by high-frequency ion-plasma sputtering have been investigated depending on conditions and atmosphere of heat treatment. After annealing in a reducing atmosphere of hydrogen is a significant decrease in the resistivity of the films from the 1011 Ohm×cm for freshly prepared films to 106 Ohm×cm it was found. The analysis of the results was investigated. Irrespective of the composition of the atmosphere in annealing β-Ga2O3 thin films photoconductivity observed effect it was shown. Compare photoconductivity spectra with the spectra excitations of luminescence indicated that the photoconductivity of β-Ga2O3 thin films associated with band-band transitions with the creation of free charge carriers in the conduction band. |
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| Issue 10, Pages: B-34-B-36 |
| DOI: https://doi.org/10.30970/elit2018.B10 |
| Formation of Nanostructures on the Surface of CdBr2 and PbI2 Crystals |
| I. Rovetskyi, I. Bolesta |
| By using atomic force microscopy, the surface morphology of CdBr2 and PbI2 crystals was investigated close to the thermodynamic equilibrium. Results of the performed studies indicate that three types of nanostructures are formed on the CdBr2 surface: triangle-shaped nanopores, nanoislands and nanowires. Principal morphological features, such as radius, height and average distance to nearest neighbor are analyzed. Time evolution of the nanostructures formation on CdBr2 surface shows that nanopores and nanoislands are formed during first 72 hours of aging in air. During next 72 hours nanowires are formed. No signatures confirming the formation of nanostructures on the PbI2 crystal surface were detected. |
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| Issue 10, Pages: B-37-B-40 |
| DOI: https://doi.org/10.30970/elit2018.B11 |
| Enhancement of the RE3+ Luminescence in the RE-Ag Co-doped Tetraborate Glasses |
| B. Padlyak, I. Kindrat, T. Padlyak, V. Adamiv |
| The Ag-doped Li2B4O7 and LiKB4O7 tetraborate glasses of high optical quality as well as Li2B4O7 glasses co-doped with rare earth (RE = Gd, Eu) and Ag were detailed studied by conventional electron paramagnetic resonance (EPR) and optical spectroscopy. Possible types of the Ag and RE paramagnetic and luminescence centers, their electronic and local structure in the Ag-doped and RE-Ag co-doped borate glasses were proposed based on the published data. The EPR and optical (absorption, emission, and luminescence excitation) spectra as well as luminescence decay kinetics of the Ag+, Gd3+, Eu3+ centers in the Li2B4O7:Ag, LiKB4O7:Ag, Li2B4O7:Gd,Ag, and Li2B4O7:Eu,Ag glasses were detailed investigated and analyzed. Significant enhancement of the Gd3+ and Eu3+ luminescence intensity in the Li2B4O7:RE,Ag glasses is explained by excitation energy transfer from Ag+ ions and Ag metallic nanoparticles to the RE3+ centers. |
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| Issue 10, Pages: B-41-B-44 |
| DOI: https://doi.org/10.30970/elit2018.B12 |
| Investigation of Porous Silicon Photoconductive Structures |
| P. Parandiy, L. Monastyrskii |
| Porous silicon layers photoconductive and electrical properties obtained by electrochemical etching of silicon have been investigated. Photoconductive and current-voltage properties depend on structure morphology are determined by not only properties of modified layer, but presence of charge carriers’ traps. The photosensitivity of structures with PS layers is determined by thickness of porous layer. |
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| Issue 10, Pages: B-45-B-48 |
| DOI: https://doi.org/10.30970/elit2018.B13 |
| Peculiarities of the Impact of Heat Treatment on the Magnetic Sensitivity of Irradiated by Electrons Single Crystals n-Ge |
| S. Luniov, A. Zimych, M. Khvyshchun |
| In this article has been investigated the isothermal annealing of irradiated by the flow of electrons Ω=5×1015 el./cm2, with the energy of 10 MeV, of single crystals n-Ge. Coefficients of the magnetic sensitivity for irradiated single crystals n-Ge before and after annealing at different temperatures were also determined. The abnormal annealing at the temperature of 403 K has been revealed. Hall constant was being increased during this process and the maximal magnetic sensitivity was being achieved correspondingly. Such abnormal annealing can be used as a tool to create highly sensitive Hall sensors on the basis of the irradiated n-Ge |
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| Issue 10, Pages: B-49-B-50 |
| DOI: https://doi.org/10.30970/elit2018.B14 |
| Mechanical and Thermoelectric Properties of PbSe1-xTex Solid Solutions |
| O. Vodoriz, T. Tavrina, O. Rogachova |
| The microhardness, Seebeck coefficient and electrical conductivity of PbSe1-xTex (x = 0 - 0.045) solid solutions were investigated at room temperature. In the range of small concentrations of PbTe (in the vicinity of x = 0.01 and x = 0.02) an anomalous decrease in microhardness, increase in Seebeck coefficient and electrical conductivity were registered. The concentration anomalies were interpreted as the transition from diluted to concentrated solid solutions when the interaction between impurity atoms starts to make a significant contribution to the change of the properties of materials. |
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| Issue 10, Pages: B-53-B-55 |
| DOI: https://doi.org/10.30970/elit2018.B16 |
| Fourier Analysis of the Texture of High-Definition Images |
| O. Osharovska, M. Patlayenko, V. Pyliavskyi |
| This paper presents the results of measuring the signal-to-noise ratio at the boundary of object contours in high-definition images after compression of the original digital stream based on the Fourier transform and the discrete cosine transform. It is shown that when choosing the threshold for limiting the spectral components of the image, one should not only focus on the frequency, but also take into account the magnitude of the differences in the brightness signal in areas of low-contrast textures. |
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| Issue 10, Pages: B-63-B-65 |
| DOI: https://doi.org/10.30970/elit2018.B19 |
| Model Calculations of the Phonon Dispersion Curves for Cu6AsS5I Superionic Crystal |
| I. Nebola, A. Katanytsya, M. Kayla, I. Studenyak |
| The crystal structure of Cu6AsS5I crystal have been analyzed and described by using the superspace symmetry concept. The program operating under the Maple environment and suitable for theoretically calculating the phonon spectra of Cu6AsS5I crystal has been developed. The eigenvalues of the generalized dynamic matrix have been found as well as the dispersion dependencies have been built for the directions Γ - X - M - R - Γ - M of the Brillouin zone. |
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| Issue 10, Pages: B-66-B-69 |
| DOI: https://doi.org/10.30970/elit2018.B20 |
| Transport Properties of La0.7Sr0.3MnO3/MgB2 Random Nanocomposites |
| V. Tarenkov, V. Krivoruchko, O. Boliasova |
| We have investigated electrical transport properties of random binary networks composed of superconducting MgB2 micro-particles and half-metallic ferromagnet La0.7Sr0.3MnO3 nano-particles. Unusually large value of the threshold for a percolation transition to a superconducting state of the nanocomposite has been detected for MgB2. We explain the observed behavior by significant geometric disparity between particles of the constituents and unconventional (triplet) superconducting state induced in the nanocomposite due to the proximity effect. The effect of high-frequency irradiation on a superconducting transition of the nanocomposite was investigated as well. The influence of a high-frequency signal on the critical current magnitude and superconducting transition of a nanocomposite is revealed. A nonthermal effect of an external electromagnetic irradiation on the nanocomposite characteristics has been found. |
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© Ivan Franko National University of Lviv, 2018
Developed and supported - Laboratory of high performance computing systems
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