Litteris et Artibus. – 2015 р.

Permanent URI for this collectionhttps://ena.lpnu.ua/handle/ntb/39475

Proceedings of the 5th International youth science forum, November 26–28, 2015, Lviv, Ukraine

У збірнику опубліковано матеріали наукового форуму, присвяченого проблемам у галузі комп’ютерних наук та інженерії, інформаційних технологій; геодезії, архітектури та будівництва; енергетики та систем керування; гуманітарних та соціальних наук; машинобудування, матеріалознавства, транспорту; економіки та менеджменту; хімії та хімічних технологій; права та психології; екології, природоохоронної діяльності та туризму. Видання призначено для науковців, аспірантів, студентів.

Litteris et Artibus : proceedings of the 5th International youth science forum, November 26–28, 2015, Lviv, Ukraine / Lviv Polytechnic National University. – Lviv : Lviv Polytechnic Publishing House, 2015. – CD-ROM. – 472 p.

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Simultaneous methyl methacrylate and methacrylic acid obtaining over zirconium-containing catalysts
(Lviv Polytechnic Publishing House, 2015) Nebesna, Yuliia; Nebesnyi, Roman; Ivasiv, Volodymyr; Lapychak, Nazarii; Lviv Polytechnic National University
Methyl methacrylate and methacrylic acid are widely used monomers. The aldol condensation of methyl propionate and formaldehyde is perspective process for simultaneous obtaining of this methacrylate monomers. It was found that zirconium-containing catalysts are active in this process. The effect of zirconium content in the catalyst on methyl propionate conversion and yield of methyl methacrylate and methacrylic acid has been determined. The best catalyst for methyl propionate condensation with formaldehyde has been found.
Formation of polymer microcapsules with encapsulated Fe3O4 magnetic nanoparticles
(Lviv Polytechnic Publishing House, 2015) Melnyk, Roman; Serdiuk, Vitalii; Kovalenko, Tetiana; Lviv Polytechnic National University
Surface functionalized iron oxide magnetic nanoparticles (MNPs) are a kind of novel functional materials, which can be widely used in biotechnology and catalysis as magnetic separation systems. Therefore the goal of our work was to study preparation of encapsulated MNPs by elaborated extraction-coacervation technique using synthesized heterofunctional acrylate copolymer. Magnetite MNPs modified by oleic acid were synthesized and used in encapsulation process. Developed encapsulation technique allowed to obtain microcapsules with Fe3O4 nanoparticles encapsulated in paraffin core possessing magnetic properties and covered by heterofuntional copolymer shell.
Ukrainian students’ political decision making after the Revolution of Dignity
(Lviv Polytechnic Publishing House, 2015) Shyroka, Anastasia; Kobecka, Dzvenyslava; Danyliv, Roksolana; Lviv Polytechnic National University
Article is presented the results of the study students’ decision making on parliamentary elections 2014 in Ukraine. It is showed that revolution events on Maidan did not influence the process of decision making for whom to vote in more meaningful way. More active citizens made the same cognitive errors as less active. But they felt statistically more confident in their choice of parties and deputies, in the quality of back up information, and that in case of failure, they again ready to go to the barricades. The possibility to change the future by increasing the rationality of the citizens’ choice is discussed.
Inplementation of Mackey-Glass chaotic generator with Arduino Mega 2560 demoboard
(Lviv Polytechnic Publishing House, 2015) Porozova, Sasha; Volianskyi, Roman; Dniprodzerzhynsk State Technical University
In this work we present the implementation of chaotic oscillator by solving Macke-Glass equation with a simple microcontroller. The implementation is done with wellknown Arduino demoboard. The algorithm of implementated equation is very simple and could be easily modified and tunned.
Image structure evaluation by statistical intensity features
(Lviv Polytechnic Publishing House, 2015) Melnyk, Roman; Boyko, Iryna; Lviv Polytechnic National University
In this paper an extraction of intensity variance, size-intensity mean features and color concentration is considered. Their effectiveness is evaluated for image structure analysis.
Evaluation conflicts in the enterprises activities
(Lviv Polytechnic Publishing House, 2015) Podolchak, N.; Kovalchuk, G.; Lviv Polytechnic National University
It has been elaborated the method for quantitative evaluation of level and structure of the interpersonal management conflicts that prevail over the other conflicts in the machine-building enterprises functioning. According to the reasons of appearance investigated interpersonal management conflicts were divided into the following types: informational, behavioral, structural, conflicts of relationships and values.
Income tax on individuals as a tool impact population welfare
(Lviv Polytechnic Publishing House, 2015) Khymych, Oksana; Shkilna, Valentyna; Lviv Polytechnic National University
Investigated the tax on personal income in Ukraine in modern conditions. Present briefly the major changes that occurred in the administration of personal income. Determined that there have been significant changes in the personal income tax. The study of changes in the personal income tax as a tool to influence the welfare of the population, we can conclude that the problem of raising living standards rise sharply in today's environment.
Modeling of Ni2+ exchange on the strong acid ion-exchange resin and the organic-inorganic ionite
(Lviv Polytechnic Publishing House, 2015) Afonin, Gennadiyy; Beznosyk, Yuriy; Dzyazko, Yuliyia; National Technical University of Ukraine “Kyiv Polytechnic Institute”; Academy of Sciences
In dynamic conditions extraction of ions of Ni2+ from the combined solution with using of acid ion-exchange gel pitch and the composite ionite on its basis containing units of nanoparticles of hydrophosphate of zirconium is investigated. The model allowing to define time for which capacity of Ni2+ ions is ful offered. The model assumes use only of empirical parameters reflecting concoction of ions in a firm phase.
Welded layers microstructure modification on the basis of powder wire Cr10B4 with addition of Al, Mg
(Lviv Polytechnic Publishing House, 2015) Voitovych, Andriy; Mykhalskyi, Roman; Vlakh, Roman; Lviv Polytechnic National University
The welded layers formed of powder wires PW Cr10B4, PW Cr10B4Al2, PW Cr10B4AlMg were investigated in the course of work. It was defined that Al, Mg applications influence the microstructure grinding and rounding carboboride inclusions. Abrasive wear resistance of the weld materials under the condition of outwearing by a fixed abrasive, unfixed abrasive, as well as shock load, was detected. It was determined that wear resistance of the welded layers with PW Cr10B4AlMg at shock load was 3.5 time higher than that of other weld materials. Degradation mechanism of the welded layers PW Cr10B4AlMg is malleable.
Financial market stabilization as a component of economic security of Ukraine
(Lviv Polytechnic Publishing House, 2015) Tosko, Roman; Blynda, Yuriy; Lviv Polytechnic National University
The article deals with the essence of the problem of domestic and global financial market and presents a priority steps to stabilize and further development of the financial market of Ukraine.
Modelling of heterogeneous systems in microreactors
(Lviv Polytechnic Publishing House, 2015) Miroshnychenko, Yuliyia; Beznosyk, Yuriy; National Technical University of Ukraine “Kyiv Polytechnic Institute”
In this paper an overview of approaches to the modelling of heterogeneous systems (liquid-liquid) in the microreactor was performed, mathematical models of various chemical reactions in microchannels published in the literature was considered and the comparison of theoretical and practical experiments was executed. Based on the generalized data, it has been proved the feasibility of microstructured reactor application for the process of silica surface functionalization in order to carry out the synthesis of innovative sorption materials. The next stage of this research is to develop a mathematical model of the process and its implementation by means of special software environment.
Numerical solution of parametric optimization of the resonant vibro-impact system with technological limitations
(Lviv Polytechnic Publishing House, 2015) Gursky, Volodymyr; Lviv Polytechnic National University
The purpose of research: development of method of optimization of the resonance vibro-impact system stiffness parameters with technological limitations of kinematic and dynamic characteristics. The synthesis is based on a numerical dynamic analysis which uses methods of tackling nonlinear differential system of equations. The discrete algorithm of choice-based optimization of synthesized coefficients of asymmetric lump linear stiffness characteristic with limitations imposed on technological parameters and system frequency characteristics is proposed. Optimal parameters of a vibroimpact machine are determined by the maximum of power criteria, which is the ratio of maximum acceleration of the working mass to the current value of the power consumption of a mechanical system.
Modeling and analysis of processes in synchronous generator with PWM controlled excitation system
(Lviv Polytechnic Publishing House, 2015) Semeniuk, Mykola; Tutka, Vasyl; Lviv Polytechnic National University; Burshtyn Power plant
The mathematical model of synchronous generator with PWM contlolled excitation system has been developed by using mathematical modelling method. The research results of the transient and steady-state mode of generator voltage regulation are presented.
The potential of port buildings and structures for further renovation under cultural – community centers
(Lviv Polytechnic Publishing House, 2015) Gormakh, Ganna; Odessa State Academy of Building and Architecture
In the article the receptions of social activation and reconstruction of port industrial buildings under cultural - community centres and aspects of their forming are examined. The tendency of reconstruction of port territories under entertaining and health areas of the city, adaptation of technical buildings for the rest of population and sportinghealth measures, for the device of temporal city holidays and festivals is exposed.
The use of ant colony optimization algorithms for the problem of optimal route search
(Lviv Polytechnic Publishing House, 2015) Rybchak, Zoriana; Lytvyn, Vasyl; Kunanets, Natalia; Lviv Polytechnic National University
This paper introduces the ant colony system , a distributed algorithm that is applied to the traveling salesman problem In the ant colony system, a set of cooperating agents called ants cooperate to find good solutions to traveling salesman problems. Ant algorithms- a class meta heuristic methods solving combinatorial optimization problems. The basis of these algorithms responsible behavior of real ants in nature. Ants - a collective beings who build very complex social structure. Their ability to find optimal paths from nest to food sources has attracted the attention of scientists long ago. By submitting information to each other through chemicals including pheromone, ants form a chain of positive feedback. This relationship, in turn, leads to the fact that the ants eventually choose more optimal (short) path to the goal, although at the beginning there were many and they were very different.
Development of manipulation detecting algorithm as a constituent of the Internet community management system
(Lviv Polytechnic Publishing House, 2015) Holub, Zoriana; Lviv Polytechnic National University
The aim of the research is to outline main peculiarities of the manipulation in the Internet communities. The research encompasses online communication platforms which support an interactive text communication. In the paper feasibility of exploiting traditional schemes of protection from manipulation in the virtual space is questioned, differences of manipulation in real life and in the Internet communities are made obvious. On the basis of the research the algorithm for detecting manipulation in the Internet communities is suggested. The later uses technical features, peculiarities of accounts representations and content of messages to identify the fact of manipulation in the Internet community.
Definition of equivalent roughness of internal surface of a measuring pipeline
(Lviv Polytechnic Publishing House, 2015) Chaban, Bohdan; Lesovoy, Leonid; Lviv Polytechnic National University
Literature on the methods for defining the equivalent roughness of the internal surface of a measuring pipeline was analyzed. The equation for calculating the hydraulic resistance coefficient of friction of natural gas on the internal surface of the measuring pipeline was developed. The equation for calculating the equivalent roughness of the internal surface of the measuring pipeline was obtained. This equation provides improvement of accuracy of natural gas flow rate and volume measurement by means of the differential pressure method.
Automation of prototyping the pattern tests from an electronic compendium of lectures
(Lviv Polytechnic Publishing House, 2015) Markelov, О.; Basalkevych, О.; Lviv Polytechnic National University
The main goal of this work is to create the algorithmic core for the system of prototyping the pattern tests from the electronic collection of lectures. Basic similar software products are reviewed to prove the appropriateness of further development. The structure and format of input and output program files are explained. Principles of program operation and internal data representation are clarified. Information, linguistic and program supports have been evolved within the frameworks of the system realization.
CFD-modeling of gas combustion process in the industrial cyclonecalciner furnace
(Lviv Polytechnic Publishing House, 2015) Benko, Roman; Havryliv, Roman; Maystruk, Volodymyr; Lviv Polytechnic National University
The computer model that enables to investigate the work of cyclone-calciner furnace for the heating up regime has been developed. Simulation carried out in ANSYS FLUENT 15.0. The temperature field and species concentration were obtained. The work results provide important data to further study the efficiency of the limestone thermal decomposition chemical reactions and optimizing furnace design and operation modes.
Титульний аркуш до "Litteris et Artibus"
(Lviv Polytechnic Publishing House, 2015)