Litteris et Artibus

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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.
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.
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.
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.
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.
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.
Towards the abyss: the influence of parents’ alcoholism on the development in adolescence
(Lviv Polytechnic Publishing House, 2015) Khomik, Khrystyna; Honcharenko, Yelyzaveta; Lviv Polytechnic National University
The article presents a theoretical overview of the problem of deviations in adolescents who are determined by alcohol dependent parents. The behavior of alcohol dependent parents or one of them creates an atmosphere in the family, which inevitably creates resistant and mental sets in adolescents on the consumption of alcohol and updates the assimilation of norms and stereotypes of deviant behavior. The results of systematic use of alcohol that are manifested in the family, less visible to the public, but the nature and depth of its actions are the most dangerous and harmful. So, the most difficult consequences of alcohol dependence of parents for adolescents are the following: 1) the desire to consume alcohol; 2) increase in aggression and conflict, irresponsibility, which eventually can lead to antisocial behavior; 3) the emergence of vagrancy as a form of deviant behavior.
Physical education for people living with HIV: the concept and legal basis
(Lviv Polytechnic Publishing House, 2015) Nikitin, Nikita; Pelmenev, Victor; Nikitina, Anastasiya; Avakyan, Michael; Immanuel Kant Baltic Federal University
The article concerns juridical aspects of the rehabilitation for people with HIV infection. Despite the fact that there are many legal safeguards provided by legislature, social status of HIV-infected people in Russia is characterized as unsatisfactory. Besides, the study analyzes the social rights of HIV-infected patients performing physical work-outs.
Ways of improvement of tax administration on real estate distinct from plot of land
(Lviv Polytechnic Publishing House, 2015) Pelekhatyy, Andriy; M. I. Dolishniy Institute of Regional Researches of NAS of Ukraine
The article Identifies main benefits from collection of taxes on real property distinct from plot of land for local governments and taxpayers. The problems of the modern system of property taxation are analyzed. The main disadvantages of charging to local budgets in compliance with recent changes to the Tax Code of Ukraine from 12.28.2014 are identified. Proposals for improvement of budget legislation in the part of property taxation are made. Expediency to set the equal tax rate with privileges rejection for the payment of property tax is suggested.
Impact of the operating mode of neutral in 35 kV power grids on the arc overvoltages and voltage teasuring transformers
(Lviv Polytechnic Publishing House, 2015) Yatseyko, Andriy; Andrushko, Volodimir; Lviv Polytechnic National University
Has been analyzed possible methods of earthing of neutrals in 35 kV power grid. Among the most common injuries in these electrical system are arc circuits, that is why the dependence of overvoltage multiplicities on the nature of earth arcing and on the method of earth arrangement of electrical system neutral. Given that in 35 kV power grids may arise ferroresonant processes, operation of voltage measuring transformers has been researched during unstable earth arcing.
Attitude towards psychological knowledge in Ukrainian society
(Lviv Polytechnic Publishing House, 2015) Kuta, Oksana; Lviv Polytechnic National University
There are a lot of problems in Ukrainian science. Old fashioned educational programs and students who are not interested in personal growth and professional development are some of them. We believe that all these results in misunderstanding and mistrust to the psychological science in Ukraine. People of different age might use psychological knowledge in everyday life more often – in case of solving personal difficulties problems or for improving quality of life. The results of empirical study of use of psychological knowledge among ordinary people are presented.
Computer modeling and automation of process of cleaning liquids from ferromagnetic impurities
(Lviv Polytechnic Publishing House, 2015) Safonyk, Andrii; Koval, Serhiy; National University of Water Management and Nature Resources Use
Solved model problem type "convection-mass transfer" for the water treatment process in magnetized granular filter material. Mathematical analysis of parameters and models of the magnetic deposition of impurities. Found critical the filter at variable concentrations of magnetic impurities entering the filter. Developed automation system for the continuous purification of water from magnetic impurities, which provides an acceptable concentration of iron impurity at the output of the filter.
Influence of poly(vinyl chloride) and polymer-silicate fillers on the properties of polyester resin
(Lviv Polytechnic Publishing House, 2015) Katruk, Diana; Levytskyi, Volodymyr; Lviv Polytechnic National University
The influence of polymer modifier poly(vinyl chloride) (PVC) and polymer-silicate fillers on the physicochemical regularities of structuring of unsaturated polyester resin have been investigated. It has been ascertained that addition of Zn-silicate fillers in polyester composition leads to slower curing speed, and the introduction of Ni-silicate fillers and PVC leads to accelerate the process of curing polyester oligomers. Physical-mechanical and corrosion properties of polyester materials modified by polyvinyl chloride and polymer-silicate fillers have been determined.
Analysis of the process of obtaining methyl esters of fatty acids from waste vegetable oils
(Lviv Polytechnic Publishing House, 2015) Kukushkina, Olena; Vasylkevich, Oleksandr; Bondarenko, Sergiy; Beznosyk, Yuriy; Kyiv Politechnic Institute
The technological features of the process of obtaining the methyl esters of carboxylic acids from renewable materials were analyzed. The results showed that the waste vegetable oil can be used as raw material for biofuels production. However, to increase product yield and its quality technological scheme of obtaining the product correction is needed.
The impact of violence during childhood on personality development
(Lviv Polytechnic Publishing House, 2015) Bulachek, Karina; Semenyuk, Anastasia; Lviv Polytechnic National University
The impact of violence in different age catagory on the formation and development of personality. A brief study of the topic shows that any emotional, physical, mental or sexual abuse of children not only leads to the formation of various psychopathologies but also to the inevitable warping and inadequate rejection of both peace and people.
Gender metaphors in modern American prose
(Lviv Polytechnic Publishing House, 2015) Kaspryshyn, Anna; Lviv Polytechnic National University
The research paper presents analysis of gender metaphors in the works by modern American authors – Jay Asher, Nicholas Sparks, Laurie Halse Anderson and Lorrie Moore. In this paper the metaphors with the donor zones of man and woman are analysed. Age parameters and relationships are taken into account.
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.
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.