Текстові матеріали 2019

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The Impact of Asymmetry on Equilibrium of Logistics Systems
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Savelieva, Irina; Melnikov, Serhij; Orlovska, Alexandra V.
EN: Abstract. The article examines one of the actual problems of the theory and practice of the logistics systems functioning related to the asymmetry of information in the transport services market. Assessing the level of asymmetry in logistics systems is of fundamental importance to increase the competitiveness of relevant systems. New approach formulated herein estimates the logistics systems asymmetry by taking into account information asymmetry about the quality of transport products, as well as information asymmetry about the quality of products within the boundaries of the corresponding supply chain. This approach allows to take into account its potential capabilities and increase functional stability in the process of logistics systems design.
Bukovina: Authors, Journals, Research Issues (Scientometric Analysis on WOS Basis)
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Shyliuk, Oleh I.
EN: Objective. The goal of research was to study publications containing researches and studies related to the topic of Bukovina using the bibliometric analysis. Methods. Materials on the regional topic published within the period 1970 – 2018 were obtained from the Web of Science database (as of May 15, 2019). The obtained records were analyzed for citation characteristic, including the distribution of publications over languages, countries, journals and authors. The selection by keywords: (bukovina) OR (bucovina) OR (bukowina) OR (bukovyna) identified 304 materials published in different publications. For the period from 2008 until 2019 there has been observed the significant increase of materials published on this issue. Results. The analysis of the most citable publications allows to distinguish three clusters of research topics: geology, environment and natural resources of the region; ethnic studies; the Holocaust and acts of force during the World War II. Conclusions. This study provides the systematic review of productivity and clearness of the Bukovina’s studies and can be used for organization and identification of priorities for further regional studies.
Determining the Causes of Rolling Stock Derailment From the Track Using Modern Research Methods
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Kuzyshyn, Andriy; Batig, Andriy V.; Sobolevska, Julia H.; Kostritsa, Sergei A.; Ursulyak, Lyudmila V.; Dovhaniuk, Stepan S.
EN: Abstract. The analysis of cases of rolling stock derailment from the track at PJSC «Ukrzaliznytsia» over the past 5 years has been carried out and their main types are given. It is noted that the rapid development and improvement of computer technology allows the use of computer and mathematical modelling in the study of cases of rolling stock derailment from the rail track, which makes it possible to take into account a combination of factors that have the main influence on the behavior of rolling stock when moving along the track. It has been established that the first step is the construction of a mathematical model of an object using a selected type of mathematical description: algebraic, differential, integral equations, discrete mathematics, set theory, and others. And the second step is the choice of a method for solving these models. The simulation methods are given, which, depending on the programming style, are divided into: procedural-oriented, object-oriented, logical-oriented, rule-oriented, and oriented to constraints. An objectoriented programming of a freight car has been developed, which will make it possible to evaluate its main dynamic indicators, in particular, indicators of stability from derailment. This in turn will facilitate the establishment of the main causes of rolling stock derailment from the rail track.
Бібліотечне кураторство як складова науково-практичних зв'язків між бібліотекою та вченим: сучасний стан
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Штан, Геннадій Валерійович
UK: Мета. Бібліотечне кураторство над факультетами є новим напрямом роботи, над реалізацією якого працюють університетські бібліотеки різних країн. Робота спрямована на дослідження світового та вітчизняного досвіду університетських бібліотек в напрямі бібліотечного кураторства як складової науково-практичних зв'язків між бібліотекою та вченим. Методика. Дослідження проводилось на основі аналізу світового літературного потоку з бібліотечно-інформаційної справи. Український досвід проаналізовано на прикладі реалізації програми «Бібліотечне кураторство» Центральної наукової бібліотеки Харківського національного університету імені В. Н. Каразіна (ЦНБ ХНУ) у рамках виконання Стратегії розвитку Університету та Бібліотеки. Результати. Проаналізовано найбільш актуальні питання, що хвилюють світову бібліотечну спільноту: мета і варіанти взаємодії бібліотекаря та викладача, протиріччя у взаєминах бібліотекарів та науковців, бібліотекар і навчання з інформаційної грамотності. Основними елементами програми «Бібліотечне кураторство» ЦНБ ХНУ є розширене інформування представників факультетів щодо можливостей ЦНБ та різні форми індивідуального та групового консультування читачів, поглиблення міжорганізаційної взаємодії. Висновки. Процес взаємодії бібліотекарів із підрозділами закладів вищої освіти на початку XXI століття, в умовах всебічного й дуже швидкого розвитку інформаційного суспільства, є назрілим та необхідним. За умов раціональної та грамотної реалізації основних його умов, що вже є відпрацьованими на основі іноземного досвіду, він має великий потенціал.
Justification of Parameters of Wheelset Axle Fatigue Strength Test-Bench for Railway Rolling Stock
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Kuropiatnyk, Oleksii S.; Raksha, Serhii V.; Anofriev, Pavlo G.
ENG: Abstract. The operation safety of the railway rolling stock depends directly on the strength of the base part of the wheelset – its axle. Therefore, in recent years numerous studies of theoretical and experimental nature, both for means of rail transport, and for machines containing rail track equipment are carried out. This paper substantiates the main parameters of the fatigue test bench for axles for wheelsets of railway rolling stock. We performed an analysis of the load schema for bench tests, determined the dependence of the bench work force on the parameters of the wheelset axle. In addition, we substantiated the design and parameters of vibrator. For the research, we adopted the following criteria of rationality: work force, energy consumption and longitudinal dimension of the test bench. The design is considered the best, if these criteria acquire the smallest values. The results of the research indicate that the load scheme “cantilever beam” is rational for the fatigue bench tests of the axles for wheelsets of railway rolling stock. The best design of the vibrator have to provide the test bench work force by rotating the unbalanced mass around the stationary wheelset axle. The rational vibrator contains a sectoral eccentric mass rotating at an angular velocity of about 150 s-1. In this case, the eccentric mass value is about 80 kg, and its eccentricity is 135 mm.
Estimation of Private Locomotives Usage Efficiency for Freight Transportation in Ukraine
(Dnipro National University of Railway Transport named after Academician V. Lazaryan; Les Ulis: EDP Sciences-Web of conferences, 2019) Kozachenko, Dmytro M.; Gera, Bogdan V.; Sannytskyy, Nazar М.; Hermaniuk, Yuliia M.; Shargun, Tetyana
ENG: Abstract. Ukraine has undertaken the implementation of European Union Directives, which provide nondiscriminatory admission to the railway infrastructure of independent carriers. A significant number of factors considerably affect working conditions of the carriers which are independent of Ukrzaliznytsia. One of the goals while performing transportation by independent carriers is the organization of private locomotives operation and their service by engine crews. The purpose of the article is to assess technical and economic indices of private locomotives use for goods transportation. The schemes of infrastructure objects arrangement for locomotives operation and engine crews work are presented. Performed calculations show the potential possibility of independent railway carriers to fulfil transportation to seaports with the use of its private locomotive infrastructure exclusively. The estimation of economically expedient volumes of cargo transportation by private locomotives in comparison with existing pricing of Ukrzaliznytsia is carried out. The nonlinear dependence of transportation volume depending on the distance is determined, at which the total cost of cargo transportation by Ukrzaliznytsia locomotives is equal to the cost of cargo transportation by private locomotives. The results of the study allow concerned companies to evaluate the investment efficiency into the development of locomotive fleet for rail transportation.
Аудіальний контент сучасної театральної публіцистики України
(Дніпровський національний університет залізничного транспорту ім. акад. В. Лазаряна, Дніпро, 2019) Галацька, Валентина Леонідівна
UKR: Розглянуто жанри театральної публіцистики, які характеризують зміст сучасного мистецтва театру. Підкреслено їх дифузну природу.
Modelling of the Electric Locomotion DS3 Working
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Bannikov, Dmytro O.; Radkevich, Anatoliy V.; Muntian, Antonina O.
ENG: Abstract. The purpose of the work is to evaluate the spatial distribution of the rigidity of the carrier frame and the body of the Ukrainian electric locomotive DC3 as a single system during operation and repair. The research was carried out on the basis of the finite element method with the application of design and computing complex SCAD for Windows. The numerical model of the electric locomotive was built, tested and then used to identify the causes and providing guidance on solving some specific operational questions. They are included, for example, the possibility of eliminating the body skew when jacking up on jacks and jamming the door as a result. The researches showed that the structure of the electric locomotive DS3 in general has a rather high spatial rigidity, both in transverse and longitudinal directions, and on torsion. However, for some practical repair tasks there is not enough for that rigidity. It was recommended to increase the thickness of the shell of its body up to 4 mm or the roof up to 8 mm, which leads to an increasing in the total mass of the machine by about 2,5 and 3,5 tons, respectively.
Göttingen State and University Library (Germany) as a Model for Successful Symbiosis of Municipal and University Library
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Stepaniuk, Olena L.; Kyrpyta, Tamara V.
EN: Objective.The article informs about Göttingen State and University Library (Germany) as about a place, where specific features of public and scientific library are taken into account. Methods. The article is based on personal impressions of a visit to the library of one of the authors. Results. The library keeps its centuries-old traditions and is modern space for individual and group work. Conclusions. The article was an attempt to describe the library's digital and paper resources as an accumulation of experience that could be embodied in the university libraries of Ukraine.
Profile of the Scientific Organization in Scopus and Web of Science Databases. The Role of University Libraries in the Presentation of the Publication Activity of Scientific Organization
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Savelieva, Olena A.; Savina, Olha P.; Stepanenko, Viktoriia M.; Voitovych, Olha V.
EN: Purpose. The article is aimed to prove the possibility of increasing the significance of university libraries through the services for representing the publication activity of a scientific organization. Methodology. Consideration of the possibilities of the university library to support the scientific and publishing activities of the university, namely its publication activity, was carried out on the experience of the Scientific and Technical Library of Dnipro National University of Railway Transport named after Academician V. Lazaryan (Library of DNURT). Results. The features and stages of creating / correction of the organization profile in Scopus and Web of Science databases are presented. The role of the library in scientometric studies evaluating the publication activity of university is indicated. Conclusions. The demand for university library and strengthening of its role have significantly increased as a result of the introduction of services to support the publication activity of employees and organization.
Improving the Performance Parameters of Railway Wheels with the Help of Optimal Design Technologies of their Electric Pulse Processing
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Vakulenko, Igor A.; Kuzin, Nickolai O.; Vakulenko, Leonid I.; Raksha, Sergey V.; Proidak, Svetlana V.
ENG: Abstract. The processing by pulses of electric current (PEC) of a fragment of the rim of a railway wheel was carried out on the DS10D equipment. When the density of the electric current is from 3 to 17 A/mm2, the processing cycle consisted of the action of a pulse with a duration of 2.5-3 s and a pause between pulses of 4 s. After 150 cycles of PEC, the hardness of cold-formed metal was reduced from 10 to 20%. Studies of the parameters of the metal structure of the wheels have determined that the processing of PEC leads to a decrease in the number of defects in the internal structure, which are accumulated as a result of cold deformation of the rim along the rolling surface of the railway wheel. It has been established that, according to the nature of the influence on the hardness distribution of carbon steel, the PEC treatment corresponds to changes during tempering in the average temperature range and allows to significantly increase the operating parameters of the wheels of railway equipment.
Non-Destructive Control Data Analysis of Railroad Foundation Constructions
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Trofimov, Alexander; Kuzmenko, Albina I.; Nesterenko, Halyna I.; Avramenko, Svitlana I.; Muzykin, Mykhailo I.; Mormul, Nikolaj; Sokhatsky, Anatoliy
ENG: Abstract. The evaluation of the parameters of multi-layered foundations (railroad basis, foundations of railway structures, etc.) plays an important role in ensuring the safe movement of trains. The method of estimating the mechanical and geometric parameters of such foundations based on the solutions of inverse problems for multi-layered elastic packets is proposed. As input data for such problems the measured displacements of certain points on the package surface are used. The method allows estimating the parameters of the a priori distribution of unknown variable parameters, identifying and excluding outliers of the measured data from the created model, and constructing a posteriori estimation of the unknown parameters probability density with acceptable resolution. Proposed method can be used to create a new generation of equipment intended for non-destructive monitoring and estimating of the condition of the railroad basis and the foundations of artificial structures. The appropriate software of such vehicles based on the developed methods of data processing can be developed. The use of such equipment allows to operatively analyzing the state of individual areas of the railroad to decide on the need of repairing or replacing the railroad base or foundation of other elements of railroad infrastructure.
Information Analytics in the Organizational Structure of Libraries of Top-Rated Universities in Ukraine
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Kobelev, Oleksii M.
EN: Objective. To study of the organizational information and analytical structures of libraries of top-rated universities in Ukraine, in particular, of 4 domestic universities that entered the World University Rankings 2019. Methods. The methodological basis of the study is the basic provisions of the general theory of social communications. Comparative analysis, sociocommunicative, information, adaptive and other approaches are used. Results. The form of organization of information and analytical activities in the library depends on its place in the library system and the existing organizational structure therein. There are two options for its organization. The first option involves the distribution of tasks between the existing library departments. The second one is the creation of an independent analytical unit in the organizational structure of the library. In the libraries of the universities under study, information and analytical functions are performed by other departments, primarily by the information and reference (bibliographic) units, information service as well as scientific and methodological (research) departments. Conclusions. Thus, information and analytical activity, even for scientific libraries of leading Ukrainian universities, remains primarily a tool for improving internal library processes, and not a separate product (service) that is purposefully produced and offered to readers. Meanwhile, the intensification of the use of information and analytical technologies in libraries, the creation of specialized units therein is one of the effective tools for optimizing library work.
Інструменти для поліпшення профілю компетентності бібліотекаря
(Дніпровський національний університет залізничного транспорту ім. акад. В. Лазаряна, Дніпро, 2019) Покровська, Наталія Василівна; Щербина, Марина Олегівна; Бура, Оксана Олександрівна
UKR: На сьогоднішній день уявити роботу сучасного бібліотекаря неможливо без застосування новітніх інформаційних технологій. Тому для опанування нових потоків інформації, можливостей, знань і навичок виникає потреба працювати на випередження, постійно оновлювати свої знання відповідно до сучасних професійних вимог компетентного працівника.
Systems Mutual Loadings of Traction Asynchronous Cars
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Afanasov, Andriy M.; Shapovalov, Oleksandr S.; Voitenko, Maryna V.
EN: Abstract. The review of methods of post-repair tests of traction asynchronous motors under conditions of locomotive depot is carried out.The necessity of introducing special stands for post-repair tests is shown in order to improve their quality, reduce the number of failures of service equipment, improve safety of the railway transport. Let's consider a question of power supply of the research asynchronous engine in wide frequency range and also a possibility of creation of the universal stand for testing important asynchronous engines of the electrorolling stock. Survey of possible versions of the scheme mutual loadings of asynchronous electrical machines which can be used for testing traction asynchronous engines of the rolling stock is executed. Such systems can be constructed both with use of the static converter of frequency, and without it. The given short characteristic of each alternative, certain advantages and shortcomings of each of system options. It is shown that systems with use of static converters of frequency differ in high power efficiency, allow to carry out tests in the wide frequency range of power supply, however have higher prime cost. Schemes without converters of frequency differ in smaller power efficiency, impossibility to carry out tests in the wide range of frequency of power supply, high level of consumption of reactive power . The results of the carried-out analysis can be used when choosing rational option of a system mutual loadings of asynchronous electric motors which will differ in higher functionality and power efficiency. Use of such systems will allow to lower capital expenditure for creation new and modernization of traction electrical machines that exist at the station for test.
Роль бібліотеки в організації навчального процесу в закладі вищої освіти
(Дніпровський національний університет залізничного транспорту ім. акад. В. Лазаряна, Дніпро, 2019) Поліщук, Олена Борисівна
UK: Розкрито роль бібліотеки в організації навчального процесу в закладі вищої освіти. Коротко охарактеризовано напрямки реалізації інформаційної місії бібліотеки Криворізького державного педагогічного університету (КДПУ). Розглянуто особливості бібліографічних посібників (бібліографічних покажчиків) книгозбірні.
Отражение темы «bibliometrics» в Scopus и Web of Science
(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, 2019) Матвеева, Елена Владимировна
RU: Сравниваются результаты поиска по запросу «bibliometrics» в Scopus и Web of Science. Определены журналы, напечатавшие наибольшее количество статей по данной теме, а также журналы, разместившие более всего статей в открытом доступе.
Проблема хибного розуміння та інтерпретації базових наукометричних понять
(Дніпровський національний університет залізничного транспорту ім. акад. В. Лазаряна, Дніпро, 2019) Назаровець, Сергій Андрійович
UK: В Україні активно впроваджується практика використання наукометричних показників для оцінювання результатів наукової активності вчених та установ, проте часто такі оцінювання проводяться без врахування результатів сучасних наукометричних досліджень. Мета цією роботи – описати, які характеристики наукової публікації можуть бути оцінені за допомогою наукометричних показників. У роботі звернено увагу на важливість коректного використання термінів, понять і наукометричних інструментів, зокрема, в нормативних документах, що регулюють процес оцінки наукової діяльності.
Experimental Investigation of Actual Stuation of using and Accounting of Recovered Energy of Regenerative Braking Mode at the DC Traction System
(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Bondar, Oleh I.; Ustymenko, Dmytro V.; Kurylenko, Olena Ya.; Kedria, Mykhailo M.; Karzova, Oksana O.; Krasnov, Roman V.; Baliichuk, Oleksii Yu.
ENG: Abstract. This paper deals with the problems of enhancement of registration and distribution of electric energy which can be obtained from DC electric locomotives by the regenerative braking. According to theoretical researches, it is possible to return approximately 8 - 12% of electric energy which is consumed for electric traction by using of a regenerative braking mode. However in recent years for electric traction networks of JSC “Ukrainian Railways”, this index doesn't exceed 2.6%. So we consider that the regenerative braking is one of the most prospective ways for energy saving in electric railway transport. Results of the experimental researches which were executed on DC traction substations and VL11M6 electric locomotives are described in this paper. Instantaneous values of voltage and current in different modes have been obtained. The electric energy balance for experimental zone has been performed. Also the ways of distribution and consumption of energy of regenerative braking mode have been analyzed. On this basis of the executed investigations, recommendations about providing of supercapacitor energy storage system for Ukrainian railways are proposed.
The Concept of a Hybrid Traction Power Supply System
(Les Ulis: EDP Sciences-Web of Conferences, France, 2019) Sychenko, Viktor G.; Kuznetsov, Valeriy; Kosariev, Yevhen; Bekh, Petro V.; Sayenko, Yuriy; Styslo, Bohdan O.; Pavlichenko, Mihail; Vasilev, Ihor; Pulin, Mykola M.
ENG: Abstract. The growing shortage of energy resources to provide heavy traffic and high-speed traffic necessitates the development of a new power supply scheme for a traction network using sources of distributed generation of electric energy. Application of asymmetric distributed traction power system with the use of distributed generation allows to increase electric energy efficiency of the feed system of rolling stock, reduce its material capacity and increase the reliability of the functioning of the railway system as a whole. The proposed structure of the hybrid electric traction system involves the creation of a new paradigm aimed at ensuring high demands on the voltage and specific power in the traction network, which will allow to improve the quality and safety of the transportation process when increasing the energy performance indicators. This paradigm will allow to form a new philosophy of building traction power systems. The key elements of this philosophy are decentralization of generation and consumption of electric energy, the use of intelligent electric equipment, distributed power supply management in a single information space of the energy process during transportation. The peculiarity of the proposed work is the optimal combination of technological processes of transmission, consumption of electric energy and transportation, taking into account the specific conditions of functioning of the electrified section: points of connection of power sources and their type, profile of the track, schedule of trains, types of rolling stock and equipment. Conceptually, the hybrid traction power system is an electric hub, in which the inputs are generating points, and the output is the power supply system of the rolling stock. The internal structure of the electric power objects of the hub is determined by the type of transformation and accumulation of electric energy and ways of managing these objects in real time.

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