Browsing by Author "Zelenko, Yuliia V."
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Item A Combinatorial Mathematical Model of the Dynamics of the Incidence of Covid-19 on the Example of the Situation in the Ukraine(Sergeieva&Co, Karlsruhe, Ukraine & Germany, 2024) Sablin, Oleg I.; Zelenko, Yuliia V.; Horobets, Volodymyr L.UKR: Автори на основі дослідження широкого спектру статистичних даних запропонували математичну модель динаміки поширення COVID-19 та інших подібних інфекцій. Запропонована модель допомагає зрозуміти механізми виникнення гострих респіраторних вірусних інфекцій.Item Contemporary Principles for Solving the Problem in Noise Reduction from Railway Rolling Stock(IOP Publishing, 2020) Zelenko, Yuliia V.; Zelenko, Dariia; Neduzha, Larysa O.EN: The statistical and monitoring data confirm the significant impact of the operational mode on the most important noise and vibration parameters, which is relevant for ensuring the efficiency and quality of the operational process with regard to ergonomic and environmental requirements. The article analyzes the acoustic parameters of rolling stock of the railway, emphasizes the peculiarities of noise emission from various elements of rolling stock and a track. Existing approaches towards solving the problem in the organization of railway noise control are outlined. On the basis of existing modern methods for measurement and analysis of acoustic parameters, the authors propose conceptual approaches toward monitoring the acoustic parameters, predicting noise characteristics and constructing the noise maps of railways. The algorithm of the developed acoustic model for the operational monitoring of noise load and the possibility to compile a case of noise maps for Ukrzaliznytsia is presented. The proposed algorithm allows at given basic design parameters and speed of rolling stock, known sound-absorbing and dissipative characteristics of all elements to carry out a rational selection of noise-protective measures in accordance with the sanitary noise regulations for a specific receptive facility.Item Disposal of Technological Sludge of Railway Infrastructure Enterprises(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Zelenko, Yuliia V.; Bezovska, Maryna S.; Leshchynska, Anna L.; Shnaiderman, AlexandrEN: The problem of improving environmental safety in the handling of oily waste and sludge is relevant for most industries. Significant amounts of waste oil adversely affect virtually all components of the environment. However, it is also a valuable hydrocarbon feedstock. Thus, a rational approach to the processing of sludge can have a significant environmental and economic effect. The shortcomings of traditional thermal technologies for the disposal of technological sludge and suggests using much cheaper mechanical methods were discussed in this article. For example, install decanters of various designs in a depot depending on the overall composition of the sludge and the composition of each of its main parts: the carbon-containing part, water and mechanical impurities. A modern scheme for the disposal of technological sludge from railway infrastructure enterprises has been proposed. Such a scheme allows to reduce the man-made load associated with their accumulation, circulation and minimization. The most promising example of the use of the proposed technology of utilization of oil sludge is its implementation at the local sewage treatment plants of locomotive and wagon depots.Item Energy-Efficient Means of Transporting Oil Products to Ukraine During Martial Law(MATEC, 2024) Zelenko, Yuliia V.; Cherkudinov, Volodymyr E.ENG: Carrying out transportation of oil products, there is a danger of having a negative impact on the environment - a leak of liquid can create an environmental problem for a certain area. Transportation of oil-containing cargoes to Ukraine, during martial law, is carried out by multimodal transport, namely, road, sea and rail modes of transport. As of June 2023, there are 14 border railway stations connecting Ukraine with five countries: Poland, Slovakia, Hungary, Romania and Moldova. International railway transshipment stations were studied, which allow oil products to be transshipped into tankers for further customs clearance and transportation to warehouses, civilian or military recipients. The distance of the transportation path is not always decisive in the matter of energy saving. Environmental friendliness and energy consumption during the transportation of petroleum products are also affected by the topography of the road, the landscape of the area where the roads pass, and the traffic on the roads with other vehicles.Item Enhancement of Operational Reliability of Elements in the Diesel Engine Cooling System of Locomotives(Kaunas Univ. of Technology, Lithuania, 2020) Zelenko, Yuliia V.; Keršys, A.; Neduzha, Larysa O.EN: Operating experience of diesel locomotives on railways shows that the use of insufficiently purified water results in the destruction of water cooling systems. This problem is especially acute for areas with increased hardness and mineralization of natural waters. The impact of the water demineralization degree on the corrosion rate of elements in diesel engine cooling systems of locomotives has been researched. The dependence of the corrosion rate for various metals on the degree and depth of desalination and the cooling liquid temperature is proved. Recommendations on optimizing the technology of cation treatment for cooling liquids ensuring the efficiency and durability in the operation of diesel engines of locomotives were developed.Item Environmental Strategy of Multimodal Transportation(Copyright © Drawing up & Design. ScientificWorld-NetAkhatAV, 2023) Cherkudinov, Volodymyr E.; Zelenko, Yuliia V.ENG: Using a system analysis, methods for assessing existing problems and tasks are proposed, as well as a proper definition of environmental issues as the most important in the set of issues of the creation and functioning of the transport complex is presented. At the same time, the processes of energy redistribution were taken into account in the form of specific and generalized efficiency indicators, which can be used to meet the needs of multimodal transportation. Recommendations are also proposed for the comprehensive solution of transport planning tasks, increasing safety and reducing the negative impact of transport on the environment for further spreading the application of the most successful solutions in each of the regions.Item The Impact of Motor Oils Quality on Improving the Reliability in Operation of Traction Rolling Stock(Kaunas Univ. of Technology, Lithuania, 2020) Zelenko, Yuliia V.; Bezovska, Maryna S.; Skvireckas, R.; Neduzha, Larysa O.EN: In modern operating conditions of rolling stock, railway safety is one of the priority issues. The safe operation of traction rolling stock is impossible without the effective use of all its components. One of the main characteristics of rolling stock is the reliability, the level of which is associated with the efficiency of its operation. The reliability is closely related to such an important issue as the environmental safety in operating of a railway vehicle. Domestic and world experience in operating autonomous locomotives indicates that diesel power plants play a decisive role in this. An important part of diesel engine in a locomotive is the oil system. The annual formation of a significant amount of used oils requires solving the problem of their further safe storage. The article considers the impact of motor oils quality on the reliability in operation of traction rolling stock. In this connection, a new method in recovering of used oils of different marks and returning them to the production process is proposed. This will contribute to increasing the safety in operation of railway equipment on the railways, improved economic performance, minimizing the amount of waste and their negative effect on the environment and so on.Item Methodology of Risk Assessment and Forms of Environmental Safety Management for the Transport of Dangerous Goods by Railway Transport(Dnipro National University of Railway Transport named after Academician V. Lazaryan, 2019) Zelenko, Yuliia V.; Dzhus, Oleh; Dzhus, Volodymyr S.; Yanchenko, Dmytro A.EN: The authors examined the scientific basis for managing environmental and economic risks in the transport of dangerous goods by rail. The importance of optimizing the monitoring of environmental safety and the organization of environmental risk management was noted. The paper presents the interrelation of the functional strategy of ensuring the reliability of the transportation process with other strategies. A new functional strategy and a schematic diagram of the environmental management system for making management decisions to optimize environmental management in railway transport have been proposed. A conceptual apparatus has been developed to identify and determine environmental risks and the principle of their management during the transport of dangerous goods by railway transport.Item Optimisation of Petroleum Product Transportation by Multimodal Transport During Martial Law(Springer Science and Business Media LLC, 2024) Zelenko, Yuliia V.; Cherkudinov, Volodymyr E.; Tarasov, Vsevolod; Soroka, MaksymENG: The hostilities in Ukraine have significantly changed the logistics of petroleum product supply. Overland routes via EU countries, in particular Poland, Romania and the Baltic states, have become the main transport solution. Rail transport remains the main mode of transportation for petroleum products, providing significant volumes, but faces the challenges of low capacity and delays at the borders. Road transport is showing growth due to the flexibility required in the crisis. The relevance of the work is determined by the need to increase the efficiency of logistics in the face of rising costs of transport resources and economic challenges that may be associated with a large number of both direct and indirect factors (economic, technological, political, security, etc.), the analytical set of which indicates the vulnerability of the security system for the transport of high-risk cargo.Item Phase Composition of Galvanic Iron-Nickel Alloys Obtained Using Pulsed Current(Vasyl Stefanyk Precarpathian National University, 2021) Ganich, Ruslan F.; Zabludovsky, Volodymyr O.; Artemchuk, Viktor V.; Zelenko, Yuliia V.; Marcul, Ruslan V.ENG: The paper presents the results of studying the phase composition of iron-nickel alloys obtained by unsteady electrolysis. It was found that the use of a unipolar pulse current leads to a significant increase in the crystallization overvoltage at the crystallization front at the moment of the pulse action, which affects the component composition of the coatings. The phase composition of the alloys formed at the cathode differs from that shown in the iron-nickel equilibrium diagram.Item Resource Saving and Eco-Friendly Technology for Disposal of Used Railroad Engine Oils(Rocznik Ochrona Środowiska (Annual Set The Environment Protection), 2020) Zelenko, Yuliia V. ; Bezovska, Maryna; Kuznetsov, Valeriy; Muntian, AntoninaEN: The article deals with the problems of handling used motor oils on the railways of Ukraine. At the moment, this waste is transferred to other enterprises for disposal. But, based on international experience, it is advisable to be regenerated directly at the enterprise where it is formed. The purpose of this work is to develop a modern scheme for oil waste disposal. In this regard, various indicators were investigated, reflecting both the operational suitability of oils and their toxicological parameters. As a result, we proposed a scheme and selected special equipment for handling the used engine oils, which allows to reduce the technogenic load associated with their accumulation, handling and minimization, contributes to the return of oil to the technological process. The calculated value of the conditional environmental effect and the approximate payback period allowed us to draw conclusions about the undoubted environmental and economic effect of implementing the proposed scheme.Item Risk Assessment of Emergencies During Transportation of Dangerous Goods by Rail(Printing House “Technologija”, Kaunas, Lithuania, 2024) Zelenko, Yuliia V.; Kalimbet, Mykola. V.ENG: Based on the methods of comparative typology, expert assessment, and system analysis for the route running through the industrial districts in Kryvyi Rih, using the methods for analyzing the sources and consequences of a key event, the combined Ishikawa diagram of the key event tree, risk maps of a key event, the analysis of hidden and direct priorities, the risk indicator of the complex effect of negative factors in emergencies during the transportation of dangerous goods (DG) was determined. The authors identified the most likely sources of the emergency: 1) A rocket attack that damaged the track resulting in uncontrolled cars’ derailment; 2) Exceeding the speed of a train with tanks; 3) Icy conditions, which led to an increase in the braking distance and an accident; 4) Oversight of traffic obstacles before moving tanks, which in turn can lead to a stoppage of the technological process, cargo spillage and financial losses. A probabilistic risk assessment was carried out based on an expert assessment of the operator’s risk and measures to reduce the occurrence of emergencies were proposed with annual costs of thousand UAH. After that, a probabilistic risk assessment map and a probabilistic assessment map of risk management effects were created, which make it possible to effectively manage and control the probable sources of an emergency and choose financial investments for measures to reduce the occurrence of emergencies. After that, it was proposed to use the combined car model 17-975(01) with all the necessary equipment as a means for quick localizing and eliminating the consequences of spills of hazardous substances during their transportation by rail in the event of an accident. The economic feasibility of using the proposed technique was also substantiated. The scientific novelty lies in the creation of models for analyzing the risk assessment of an emergency, as well as identification of possible sources and factors in the occurrence of emergencies during the transportation of dangerous goods by rail, and also the development of recommendations for their reduction. The practical significance is the implementation of the developed recommendations, based on the created model to form a special car for operational needs, with the selection of the necessary equipment for the rapid implementation of the 1st stage in localization and liquidation measures.Item Technological and Ecological Aspects of Disposal of Spent Cutting Fluids(Polish Society of Ecological Engineering (PTIE), 2021) Zelenko, Yuliia V.; Bezovska, Maryna; Kuznetsov, Valeriy; Muntian, AntoninaEN: Processing of metals by cutting under modern conditions becomes impossible without the use of effective cutting fluids. The main purpose of cutting fluids is cooling, lubrication of the workpiece processing area. Spent emulsion is a special type of wastewater, very dangerous to the environment, as it contains a large number of persistently emulsified petroleum products. The methods using various surfactants were tested for the cutting fluid disposal. The obtained results allowed proposing a general flow diagram of treatment of spent cutting fluids, as well as a block diagram of their purification. After processing the spent cutting fluids according to the proposed diagram, two products were obtained, namely water and sludge. This technology can be used in metalworking shops of railway enterprises, as well as the enterprises of machine-building, metallurgical and other industries where CFeffluents are formed within the wastewater complex. It will provide both an economic result through the reuse of water and will give a significant environmental effect by minimizing the amount of hazardous waste.Item The Temporal Dynamics of Readily Available Soil Moisture for Plants in the Technosols of the Nikopol Manganese ore Basin(Дніпровський національний університет ім. О. Гончара, 2019) Kunah, O. M.; Zelenko, Yuliia V.; Fedushko, M. P.; Babchenko, A. V.; Sirovatko, V. O.; Zhukov, O. V.EN: The restoration of a stable and productive ecosystem after drastic disturbances to the natural environment due to mining and open-cast mining may be achieved by means of reclamation. Investigation of the hydrological budget of technosols is important task in developing adequate approaches to reclamation. Sod lithogenic soils on red-brown clay, on grey-green clay were chosen as the objects of the investigation. The simulation of moisture content in Nikopol Manganese Ore Basin technosols was performed using the Penman-Monteith approach and evaluated the role of the dependence of soils’ surface albedo on the humidity in the intensity of evapotranspiration. The research was conducted during 2013–2015 at the station for research on reclaimed land within the Nikopol Manganese Ore Basin (city Pokrov, Ukraine). The experimental area for the study of optimal modes of agricultural reclamation was created in 1968–1970. Precipitation in the investigated area was found to fall very unevenly in time. In 2013, the duration of the rainless period was 259 days, in 2014 – 264 days, in 2015 – 261 days. The maximum daily rainfall varies within 18–49 mm. There are significant interannual differences in the intensity of rainfall. The minimum total annual precipitation in 2014 was due to a decrease in atypical rainfall in late winter and early winter. The maximum annual rainfall in 2015 was caused by intense rainfall both in the spring and in mid-summer and late autumn. The average annual temperature was 11.1 ºC and the annual totals did not statistically significantly vary within the study period. The average wind speed and average atmospheric humidity are statistically significantly different from year to year. The technosols’ colour properties and surface albedo varied depending on the moisture content. There is a linear relationship between the moisture content in the soil and albedo of the soil surface. The evaluation of readily available water content was carried out based on the Penman-Monteith model taking into account meteorological data, the water-physical properties of the technosols and the dependence of soil surface albedo on soil humidity. The distribution of this index for different teсhnosols is characterized by a high level of similarity of shape due to the fact that the overall climate factors are crucial in shaping the dynamics of moisture. A complex mixture of normal distributions is the best model for representing the experimental data. The readily available water content distribution can best be represented as a mixture of two normal distributions. The relatively high moisture level is characterized for winter and spring periods. Water content in sod-lithogenic soils on red-brown clay over the period of research never reached the value of the permanent wilting point. In 2013, the period when the moisture content was less than the value of the permanent wilting point lasted 23 days, and in 2014 this period lasted 39 days. Thus, you can always expect the phenomenon of drought under typical climatic conditions for the technosols on grey-green clay. It was found that monitoring water supplies before the start of the growing season can provide valuable information necessary for the selection of crops for cultivation in the current year. The results indicate the urgency of measures to save the winter rainfall on the fields.