Rivne State Humanitarian University

Rivne, Ukraine

Rivne State Humanitarian University

Rivne, Ukraine
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Danilevska N.B.,Rivne State Humanitarian University | Moroz M.V.,National University of Water and Enviromental Engineering | Nechyporuk B.D.,Rivne State Humanitarian University | Novoseletskyy N.Y.,Rivne State Humanitarian University | Rudyk B.P.,National University of Water and Enviromental Engineering
Journal of Physical Studies | Year: 2016

The growth of nanoparticles is a complicated process, it depends on different factors in the reaction chamber, such as temperature, reagent concentration, duration, etc. The technological aspects play an important role in the dimensions and shape of nanoparticles, which affects its properties, especially when we have the nanoparticles of a semiconducting material. In this article we have made an attempt to explore the influence of sodium chloride concentration and temperature of the electrolyte on the process of obtaining zinc oxide nanocrystals by the electrolytic method in an open electrolytic bath. The received samples were studied at room temperature by X-ray diffraction to determine its structure and dimensioning. The XRD pattern of samples exhibits a zinc-blended crystal structure. The nanocrystals dimensioning was made by using the Debye-Scherrer and Williamson-Hall methods, then the obtained results were compared. With the electrolyte temperature decreasing there were found new weak XRD peaks that do not belong to a wurtzite pattern, but do to the hydrozincite one. In the article a way of forming the hydrozincite using the atmospheric carbon dioxide is offered. It is also shown that the zinc oxide nanocrystals size decreases with a decrease of temperature of the electrolyte. © 2016, Ivan Franko National University of Lviv. All Rights Reserved.


Iedynak G.,Lviv State University of Physical Culture | Galamandjuk L.,Ivan Ogienko National University in Kamianets | Dutchak M.,National University of Physical Education and Sports of Ukraine | Balatska L.,Chernivtsi National University | And 2 more authors.
Journal of Physical Education and Sport | Year: 2017

During the school year, we used three basic movement teaching methods, including manual dexterity (rolling, catching, throwing), walking, running, jumping, balance, climbing and crawling, that the children did not study previously. Each training method was used with girls and boys who had ambidexterity, left and right handedness who were from 3 years old to 3 years, 5 months and 29 days. We determined the effectiveness of training for achieving a high level of mastery (capitalization of freedom of degrees or CDF) only for those students with manual dexterity. Our data showed that the results were independent of sex or handedness. Two of the training methods included movement repetition by each hand (foot, left, right), but a different sequence was more effective than repetition of movement only by the leading hand (foot direction). More movements of the CDF level were achieved by first performing non-conductive hand (foot, non-conductive direction) movements to achieve an exploration level of freedom degrees (EDF), which then lead to CDF formation but with alternate implementation of the arm and conductive hand. After the most effective method of teaching was used, girls with ambidexterity, right and left handedness achieved CDF levels of 3, 2 and 5 movements, respectively, and boys achieved 4, 3 and 4 movements, respectively. Girls made the same two movements (to throw the ball to the instructor with both hands from chest and throw objects at a distance using both hands alternately), and the boys made three (throwing objects towards horizontal and vertical targets and at a distance with both hands alternately). Using the most effective methods of learning basic movements with four-year-old children, one can achieve the best results for the CDF formation for movements of manual dexterity, and in the longer term, the development of motor function at a higher level. © JPES.


Bomba A.,Rivne State Humanitarian University | Nazaruk M.V.,Lviv Polytechnic | Kunanets N.E.,Lviv Polytechnic | Pasichnyk V.V.,Lviv Polytechnic
International Journal of Computing | Year: 2017

The concept of knowledge potential of agents which serves as a characteristic of a certain amount of knowledge of any individual accumulated over a certain period of life is presented in the paper. The original model approach to information processes of knowledge potential dissemination based on physical analogies, namely the phenomenon of diffusion, is proposed. The redistribution process of two-component knowledge potential is described and the results of numerical experiments are given. The diffusion-like models of knowledge potential distribution in the social and communicative educational environment of the city are built. In particular, the attention is focused on the description (modeling) of knowledge potential redistribution processes within a given social and communicative community (clique), with well-established external and internal relationship between the members (agents) of educational and training processes. Solutions to the modeling problem of interaction (interference) between the knowledge potential components of different agents within a given clique are proposed, a multi-vector of knowledge potential is considered and the results of numerical experiments are given. © Research Institute for Intelligent Computer Systems, 2017.


Mashchenko V.A.,Rivne State Humanitarian University | Sadovenko I.O.,National Mining University
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu | Year: 2014

Purpose. To analyze the influence of structural and morphological, and elastic characteristics of defects on the features of the structure and deformation of some sandstones based on the modeling approach and interpretation of experimental data of velocity of longitudinal and transverse acoustic waves. Methodology. We have involved a series of experimental studies of density, porosity, and determination of the velocity of propagation of longitudinal and transverse acoustic waves in samples of sandstone with different structural organization. Findings. The elastic parameters of defects of solid structure were calculated based on the velocities of propagation of acoustic waves for sandstones with different effective Poisson's ratio. The normal and tangential compliances with the effective Poisson's ratio of sandstone were comparatively analyzed. Poisson's ratio of the medium matrix was calculated based on the variations of the velocities of propagation of acoustic waves under the influence of external pressure. Originality. The deformation behavior of sandstones was considered on the basis of the model of microinhomogeneous medium as an elastic matrix and planar defects inclusions. Theoretical estimates of the parameters of defects, based on the elastic constants of linear elasticity theory, indicate the adequacy of the model to describe the strain state of imperfectly elastic rock. The possibility of the existence of negative Poisson's ratio in sandstones with high normal compressibility and the contribution of the contact interactions were theoretically justified. Practical value. Theoretical estimates of the parameters of defects, based on the elastic constants of linear elasticity theory, indicate the adequacy of the model to describe the strain state of imperfectly elastic rock. There were obtained the relations for evaluation of normal and tangential compliance on the basis of effective elastic moduli microinhomogeneous medium, elastic moduli and the Poisson's ratio of the matrix medium. It is shown that the concentrations of defects in their compliance and effective Poisson's ratio have an inverse relationship, which determines the strain-elastic properties of the medium of propagation of acoustic waves.


Kapitula S.Y.,Rivne State Humanitarian University | Nechiporuk B.D.,Rivne State Humanitarian University | Danilevskaya N.B.,Lesya Ukrainka Eastern European National University | Tatarin B.A.,Lesya Ukrainka Eastern European National University
Journal of Nano- and Electronic Physics | Year: 2015

It is shown the possibility of production of the nanoparticles compounds cadmium electrolyte method using cadmium electrode and table salt as an electrolyte. When the temperature of the electrolyte 98 °C obtained nanoparticle CdCO3, β-Cd (OH)2 and γ-Cd (OH)2 dimensions which are estimated by the formula Debye-Šerrera at 22 nm, 21 nm 19 nm respectively. The contents of the data of the compounds was determined by the XRD method. Analysis of the influence of synthesis conditions on the content of cadmium Carbonate. © 2015 Sumy State University.


Danilevskaya N.B.,Rivne State Humanitarian University | Moroz N.V.,National University of Water management and Nature resources use | Nechyporuk B.D.,Rivne State Humanitarian University | Rudyk B.P.,National University of Water management and Nature resources use
Journal of Nano- and Electronic Physics | Year: 2016

The possibility of obtaining zinc oxide and sulfide nanocrystals by electrolytic method using sodium thiosulfate solution as the electrolyte is given. Received samples were examined by methods of X-ray diffraction analysis and absorption spectrometry. The size of nanoparticles is defined by Williamson-Hall and Debye-Scherrer methods. Found that the nanocrystals data of substances are in tension, which affect the value of the broadening of x-ray peaks. © 2016 Sumy State University.


Gaevs'kyi V.R.,National University of Water management and Nature resources use | Nechyporuk B.D.,Rivne State Humanitarian University | Novoselets'kyi N.Y.,Rivne State Humanitarian University | Rudyk B.P.,National University of Water management and Nature resources use
Ukrainian Journal of Physics | Year: 2013

A possibility of electrolytic fabrication of zinc oxide nanocrystals with the use of zinc electrodes and the aqueous solution of sodium chloride as an electrolyte has been demonstrated. The xray analysis of obtained nanoparticles shows that their size is of the order of 30 nm. The researches of the electrolyte transmission spectra registered after the main experiment has been terminated show that the energy gap width in ZnO nanoparticles is 3.35 eV, which agrees with the corresponding value for ZnO single crystals. © V.R. GAEVSKYI, B.D. NECHYPORUK,N.YU. NOVOSELETSKYI, B.P. RUDYK, 2013.


Kolupaev B.B.,Ukrainian Academy of Sciences | Klepko V.V.,Ukrainian Academy of Sciences | Lebedev E.V.,Ukrainian Academy of Sciences | Kolupaev B.S.,Rivne State Humanitarian University
Polymer Science - Series A | Year: 2010

Phonon relaxation and internal friction in kaolin-and bentonite-filled PVC composites are studied. By varying the temperature and/or content of the ultrafine mineral filler in the PVC, one can control the contribution from phonon viscosity, damping force, and the effect of viscosity into the energy dissipation of ultrasonic oscillations in the MHz frequency interval. The dynamic character of the measurements makes it possible to differentiate between relaxation phenomena in the composites and to suggest methods for their controlled changes. © Pleiades Publishing, Ltd., 2010.


Krivtsov V.V.,Rivne State Humanitarian University | Malinovsky Y.V.,Rivne State Humanitarian University
Journal of Nano- and Electronic Physics | Year: 2014

Electretic state and radiation absorption of nanocomposites consisting of polymer matrix and metal particles filler obtained in result of electric explosion are investigated. Stable thermoelectrets of polymer metal-filled systems that have better electert properties than traditional polymer materials are obtained. Suggested method of composite polymer system creation enables to obtain shielded materials with better radiative absorption, resistant to external actions, cost-efficient. © 2014 Sumy State University.


Kolupaev B.B.,Rivne State Humanitarian University | Levchuk V.V.,Rivne State Humanitarian University | Maksimtsev Y.R.,Rivne State Humanitarian University | Kolupaev B.S.,Rivne State Humanitarian University
Surface Engineering and Applied Electrochemistry | Year: 2015

The results of studies of the acoustic properties of polyvinylchloride (PVC) with a nanofiller (Cu) prepared by the electric explosion of wires have been described. It has been shown that, under a longitudinal and shearing deformation at a frequency of 0.4 MHz in a wide range of temperatures and component concentrations, the viscoelastic properties of the material are formed owing to the interaction at the polymer-filler interface and the occurrence of topological effects. The application of PVC systems under dynamic and temperature loads has been specified. © 2015, Allerton Press, Inc.

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