bluuebunny/crossref_metadata_2025 huggingface dataset:
Cystoid macular edema after cataract surgery. Aragua regional ophthalmological center and Maracay Central Hospital
Authors: García C Yuraima , Lander Denys , Schulz Juan , Santander Víctor , Carrasquel Ariacne , Cumana Karina
Published: May 2023

Cystoid macular edema (CME) is a late complication of cataract surgery. Objective: To evaluate the frequency of cystoid macular edema after cataract surgery at the Regional Ophthalmology Center of Aragua and Hospital Central de Maracay during the period from March to August 2022. A quantitative investigation was developed, with a non-experimental, descriptive design. The study was prospective and longitudinal in a population of 148 patients for a sample of 45 eyes of 45 patients who presented cataracts and underwent surgery using extracapsular extraction and phacoemulsification techniques. Results: 6 cases of CME were presented, representing a frequency of 13%. The average age was 66 ± SD 12.49 years, 50% of the cases were between 65 and 71 years. 67% corresponded to the female sex, with the same frequency of 50% for both eyes. 67% presented corrected visual acuity less than 20/80 at the fourth week, this frequency rising to 83% at the sixth week; 18% presented a central foveal thickness greater than 241 µm in the fourth week, maintaining this value in the sixth. 67% of the patients were operated on by the EECC technique and the rest by FACO. Conclusion: CME is a post-surgical cataract complication, being higher in advanced age, female sex and with the application of the EECC technique. Patients with CME presented progressive deterioration of visual acuity and foveal thickening, observing that the lower the corrected visual acuity, the greater the foveal thickness.
Fatty acid compositions of colostrum and mature breast milk in Turkey (Mardin)
Authors: Kaçar S. , Başhan M. , Keskin C.
Published: May 2023

In this study, 25–25 milk samples (25 colostral and 25 mature) collected at different lactational stages were used to analyse the fatty acid composition of breast milk. A gas-chromatographic method was used to perform and analyse the transmethylation of total milk lipid extracts. The milk samples contained 20 different fatty acids. Palmitic acid (C16:0), stearic acid (C18:0), myristic acid (C14:0), oleic acid (C18:1n-9), and linoleic acid (LA, C18:2n-6) were the major components of total lipid, phospholipid (PL), and triacylglycerol (TAG) fractions. Colostrum had a lower percentage of polyunsaturated fatty acids (PUFAs), a higher percentage of saturated fatty acids (SFAs), and a lower level of eicosapentaenoic acid (EPA, C20:5 n-3) and docosahexaenoic acid (DHA, C22:6 n-3) in total lipid than mature milk. Triacylglycerol and PL fractions between colostrum and mature milk samples did not differ statistically.
THE ARTICLE CONSIDERS THE ACCOUNT FOR THE REINFORCED CONCRETE HOLLOW - SECTION ELEMENTS WITH NORMAL CRACKS IN TORSION
Authors: Azizov T. N. , Melnik A. V. , Melnik A. S.
Published: May 2023

The article is dealt with the methodology of determination of stressed-and-strained state for the reinforced concrete hollow-section elements with normal cracks as a result of torque rigidity. It is shown that the inflexibility of elements of bridges and frameworks influences significantly upon the redistribution of efforts between them.
DEDICATED TO MEMORY OF PROFESSOR MIKHAIL N. GOLDSTEIN (FOR THE 100TH ANNIVERSARY OF BIRTH)
Authors: Petrenko V. D.
Published: May 2023

The article is devoted to the memory of prominent scientist in the field of soil mechanics and construction of foundations Prof. Mikhail Naumovich Goldstein, who had created the worldwide-known geotechnical school.
STRESS-STRAIN STATE OF THE MAIN STRUCTURES OF THE BRIDGE CONVEYORS
Authors: Barbas Yo. H. , Boyko P. P.
Published: May 2023

The review of metal designs of bridge faucets-unloaders is offered.
INFLUENCE FACTORS ON STRUCTURE-PERFORMANCE PROPERTIES DESIGNS SPECIAL-PURPOSE PROPERTIES IN LARGE CITIES
Authors: Biloshitska N. I.
Published: May 2023

In the article the research results of influence of the structure-forming factors on operational characteristics of the plastoconcrete structures for repair-restoration work in the aggressive conditions of big city are presented.
MANAGE OF CONCRETE BRIDGES’ ELEMENTS ON THE BASIS OF FUZZY LOGIC MODELS
Authors: Bodnar L. P.
Published: May 2023

The refinement of estimation of operational state of the ferro-concrete bridge elements and the direction of substantiation of the bridge service levels on the basis of fuzzy set theory and fuzzy logic are offered.
THE FORECAST OF INCLINE OF THE BASE CONSTRUCTIONS ON WATER-SATURATED BASE UNDER THE SETTLEMENT SCHEME OF A SOIL LAYER OF A FINAL THICKNESS
Authors: Babich F. V. , Sedin V. L. , Shapoval V. H.
Published: May 2023

The solution for the forecast of incline of the rectangular base on the linear elastic isotropic water-saturated basement under the settlement scheme of a soil layer of a final thickness is shown. It is proved that rate of process of filtration consolidation of the basement is directly proportional to the value of Poisson’s coefficient ratio of the basement, division of the foundation base length to its width and inversely proportional to the soil layer thickness.
SURVEY RESULTS AND TESTING OF RAILWAY BRIDGES
Authors: Haniiev I. H.
Published: May 2023

The article is devoted to the survey and testing of railway bridges by the State Joint-Stock Railway Company «Uzbekiston Temir Yollari» («Uzbekistan Railways»). It is stated that in the existing rules on determination of the capacity of bridges the recommendations on taking into account the cumulative deflection to the moment of technical diagnostics of spans on the bridge capacity are absent. The author states on the need to develop a method for determining the wear of spans on restriction of the residual deflection in the bridge floor slabs.
RECONSTRUCTION OF BRIDGE STRUCTURES USING DIAMOND DRILLING AND CUTTING TECHNOLOGY
Authors: Kazaryan V. Yu.
Published: May 2023

The examples of application of the technology of diamond cutting and diamond drilling in reconstruction of bridge structures in Russia are given.
EXPERIENCE OF STRENGTHENING BASES OF EMERGENCY BRIDGE
Authors: Hrechko V. F. , Hrechko O. V.
Published: May 2023

The creation of the cascade of hydroelectric power stations in Dnepr-river channel was accompanied by creation of artificial water basins. Change of hydro-geological conditions has resulted in flooding of adjoining territories and necessity of maintenance of the operational suitability of buildings and constructions located on them. The results of works on restoration of automobile overbridge above railroad tracks with intensive movement of trains in the city of Nikopollocated on the coast ofKakhovskoewater basin are presented. During operation more than 40 years, the inadmissible deformations in the above-ground overbridge constructions, caused by non-uniform settlements of foundations of supports, have taken place. The non-uniformity of foundations settlements has achieved600 mm.The foundations settlements were due to the changes of physical-and-mechanical characteristics of loessial soil of foundation owing to heaving of the underground water level.
WORK OF COMBINED LARGE DIAMETER PIPE (SLURRY PIPELINE) ON ALLUVIAL SOILS TAILING HGF
Authors: Hurzhij A. O.
Published: May 2023

The research results of influence of the deformation of tailing-dump dams on the sludge lines are considered. In designing the routes of sludge lines, it is offered to calculate the base deformations under the sludge line to substantiate the anti-destruction protection of sludge lines.
THE FLEXIBLE TUNNEL LINING IN DIFFICULT MINING AND GEOLOGICAL CONDITIONS
Authors: Druzhko E. B. , Ogloblin V. F. , Samoylov V. V.
Published: May 2023

The article is dealt with the issues of efficiency and constructive solutions to nodes and elements of the lining objects of tunnel type in complicated geological conditions. A construction of the lining from the universal yielding blocks of uniform size is offered. Reaching pliable layer and methods of calculating of the veering capacity of a two-layer lining arched and circular shapes are recommended.
BUILDING BRIDGES ON THE LINEAR TECHNOLOGY CYCLIC SLIDING. THE GERMAN EXPERIENCE
Authors: Kanshin E.
Published: May 2023

The basic provisions of technology of the cyclic longitudinal pulling down of bridges are presented in the article. The historical review and examples of effective application of technology for building of modern transport structures of complicated configuration in the straitened conditions of performing the work are given.
THE PATTERN OF INFLUENCE OF THE ELECTROCHEMICAL FIXING LOESS SOILS'' PARAMETERS ON THE CARRYING CAPACITY OF THE ANCHORS
Authors: Zocenko M. L. , Trocenko D. O. , Titarenko V. A.
Published: May 2023

The results of complex experimental investigations of influence of the electrochemical stabilization of loessial soils on the bearing capacity of anchors are presented.
FEATURES OF DESIGNING PRECAST-MONOLITHIC BRIDGE SPANS
Authors: Koval P. M. , Fal A. E. , Marchuk S. M.
Published: May 2023

The calculation results for assembling monolithic spans are described. The data obtained during calculations are analyzed; the necessity of calculation of spans of this type at a few stages of including separate elements into work is determined. The comparative calculation of spatial models in the LIRA SOFTWARE is conducted.
ANALYSIS OF FUNNELS EVALUATION MODEL BY THE “CONSTRUCTION-SOIL” SYSTEM
Authors: Koretskiy A. S. , Lantuh-Lyaschenko A. I. , Medvedev K. V.
Published: May 2023

Recently in the European countries the designs of flexible pipes and pipe bridges, the bearing capacity of which is provided by passive resistance of soil, have found more applications. The paper presents an analysis of existing models for calculating flexible pipes working as a system «construction-soil». The numerical example for calculating such construction design using software package SCAD is given.
THE STRAIN- STRESS STATE OF STEEL REINFORCED CONCRETE BEAMS
Authors: Krukhmalov A. V.
Published: May 2023

The experimental investigations of steel-reinforced concrete beams composed of double-T No. 16 and the reinforced concrete slab of size 220×60×1200 mm were conducted. Various types of anchors (loop, rod, rigid ones) were used as unifying means of the structure elements. The test on action of concentrated load applied in the middle of the beam length through the traverse was carried out. The convergence estimate for these experimental results with the data of theoretical calculations was done.
ON THE ISSUE OF "MEMORY" MARKOV MODEL OF DAMAGE ACCUMULATION
Authors: Lantuh-Lyaschenko A. I.
Published: May 2023

This paper presents the application of a probabilistic approach for the modeling of service life of highway bridge elements. The focus of this paper is on the Markov stochastic deterioration models. These models can be used as effective tool for technical state assessments and prediction of residual resource of a structure. For the bridge maintenance purpose these models can give quantitative criteria of a reliability level, risk and prediction algorithms of the residual resource.
DESIGNING OF LIGHTWEIGHT CONCRETE WITH SECONDARY RESOURCES IN DNIPROPETROVSK REGION
Authors: Netesa M. I. , Palanchuk D. V.
Published: May 2023

The problems of utilization of the local industry after-products in the easy concretes and efficiency improvement for using the cement by providing of rational grain composition of the components are presented.
OPTIMIZATION OF COMPOSITION, STRUCTURE, PROPERTIES OF CONCRETE MIXTURE AND CONSTRUCTIONAL CLAYDITE-CONCRETE
Authors: Nikiforova N. A. , Maslyaev A. F.
Published: May 2023

In the article the aspects of mutual influence of the resilience and cohesion characteristics of the concrete mortar ingredients on its physical and mechanical properties are considered.
POSSIBILITIES OF THE EFFECTIVE WASTE MANAGEMENT OF ORE MINING AND DRESSING GROUPS FOR THE PRODUCTION OF THE HEAVY - AGGREGATE
Authors: Nikiforova N. A.
Published: May 2023

The possibility of the effective waste management of ore mining and dressing groups for the production of the heavy-aggregate concrete is shown.
THE NETWORK MODEL OF “BUILDING - INVESTMENT - PROTECT” IS UPGRADED APPARATUS TO CONTROL FOR PROCESS OF BUILDING ORGANIZATIONS AND RATIONAL USING CUSTOMERS’ RESOURCES OF BUILDING PROJECT
Authors: Prihodko D. O.
Published: May 2023

As an innovative instrument of design of processes of construction organization, it is offered the determined network model «Bud-Invest-Protect» with the parameters of new content, which provides both the rhythm of implementation of preparatory, build and special works and meeting to the customer’s requirements in relation to organizationaland-technologic reliability of those organizations, which perform the preparatory, build and special works.
THE SYSTEM APPROACH TO PROVIDING RESOURCES FOR REPAIR OF BRIDGES AND OVERBRIDGES IS USED
Authors: Pshinko O. M. , Radkevich A. V. , M'yaken'ka I. V.
Published: May 2023

The existing systems used for solving definite tasks, the system description of construction processes and the advent of a new branch – the construction systems engineering – have been analyzed in the article. The possibility of applying the system approach to providing resources for repair of bridges and overbridges has been investigated.
CHECKING OF TECHNICAL BRIDGES’ STATE BY PASSIVE VIBRATIONAL DYNAMICS METHODS
Authors: Redchenko V. P.
Published: May 2023

In the article the results of studies of the passive vibration test methods and the possibilities of using them for determining and monitoring of technical condition of bridges are presented.
ELIMINATION OF CAREEN OF THE BASE A GEOTECHNICAL SIDE JOB OF THE SOIL BASIS UNDER ITS SOLE
Authors: Chaplyhin V. I. , Hrechko O. V.
Published: May 2023

The geomechanical design model of soil base, corresponding to the physical state of soils (underworked by horizontal cylindrical boreholes) under the strip foundation, is offered. The block diagram of device for control of parameters of the system «underworked soil base – strip foundation with tilt» is presented. The unforeseen circumstances of technological and organizational character, which influence on the stressed-and-strained state of the system «base – foundation – superstructure» can arise during the elimination of excessive tilts of buildings and structures. Therefore it is necessary to have trustworthy information about the actual stressed-and-strained state of an object during making such works. The automated measurement-and-information system has been developed and widely applied for conducting the real time monitoring. The technical means of system include: inductive gauges, instruments for inductance measurements, information-gathering block and communication lines. Numerical modeling of the stressed-and-strained state of buildings and structures with use of the automated measurement-andinformation system and program complex «Geotekhnika» [1] allows correcting the project during the elimination of excessive tilts and controlling the technological settlements in order to reduce a risk.
OPERATIONAL AND ENVIRONMENTAL ADVANTAGES OF THERMAL INSULATION BY USING A MODIFIED FOAMGLASS
Authors: Shcherbak A. S.
Published: May 2023

In the article the ecological and operational advantages of heat-insulation on the basis of foam-glass are considered. The influence of different effects, such as deformation, oxidization, erosion, temperature gradients are described, as well as such properties as non-burning, ecological, sanitary, chemical and biological safety are shown.
THE ESTIMATION OF DEVELOPMENT SELF -CONSISTENT DAMAGES OF SLIMY STEEL CONSTRUCTIONS
Authors: Skalskiy V. R. , Rudavskiy D. V. , Galan P. Ya. , Lyasota I. M. , Velikiy P. P. , Tolopko Ya. D.
Published: May 2023

The procedure for testing the prismatic steel specimens of heavy constructions to build the kinetic diagrams of fatigue fracture is described in the paper. The kinetic diagrams obtained have been approximated by analytical dependences with unknown parameters, which were found using least squares method.
IMPROVING THE EFFICIENCY OF ASYNCHRONOUS TRACTION DRIVE
Authors: Bezruchenko V. M. , Bondarenko Yu. S. , Khoroshko O. O.
Published: May 2023

In the article the use of asynchronous tractive electric drive controlled by frequency, when the power and speed of electric locomotive is greatly increased, is shown.
THE DETERMINATION OF DISPLACEMENTS ON THE SURFACE OF THE HALF SPACE CAUSED BY AN INNER CRACK NUCLEATION
Authors: Skalskiy V. R. , Stankevich O. M.
Published: May 2023

The dynamic problem on determination of the wave field of displacements on the surface of the elastic halfspace caused by an inner crack nucleation is presented. The problem is solved using boundary integral equations. The relationships between the parameters of displacements of the body surface points and the functions of opening of the defect walls are derived and analyzed.
IMPROVING THE RELIABILITY OF THE POWER CIRCUIT OF THE ELECTRIC TRAINS ЕР2Т AND ЕПЛ2Т
Authors: Visin N. H. , Vlasenko B. T. , Sokolov A. A.
Published: May 2023

The transitional processes in shunt circuit of traction engines, which armatures and excitation windings are connected in non-conducting direction as to the flowing power current, are considered in this paper. The changes in the control circuits of braking switch and in the shunt power circuit of traction engines with additional mounting a resistor of 0.5 Ohm are proposed. All this modernization will allow increasing greatly the operation reliability of power circuit of ЭР2Т and ЕПЛ2Т electric locomotives during their service life.
THE ISSUES OF THE STATE OF EXPLOITATION ARTIFICIAL BUILDING ON THE RAILWAYS OF UKRAINE, THEIR MAINTENANCE RECONSTRUCTION AND STRENGTHENING
Authors: Soldatov K. I. , Blokhin S. E.
Published: May 2023

The publication is devoted to the issues of the state of artificial building on the railways of Ukraine, their maintenance, reconstruction, strengthening and extension of exploitation life.
THE INSPECTION AND THE ANALYSIS OF DISPLACEMENTS ON MOBILE SUPPORTING PARTS OF BEAMS FRAMEWORKS OF RAILWAY BRIDGE
Authors: Tarasenko V. P. , Huk L. M. , Odrinskiy H. M.
Published: May 2023

The results of inspection of supporting parts, the calculation of setting of mobile supporting parts at erecting of spans and detecting of deformations of supports on the additional displacements on mobile supporting parts are presented in the article.
THE ANALYSIS OF CONSOLIDATION PROCESS OF CLAY SOILS FROM CAUSED BY THE DUTY PROCESS IN ERECTIONS THE ROAD BED OF HIGHWAYS
Authors: Timofeeva L. M.
Published: May 2023

The analysis of consolidation process of condensed water-saturated clay soils of the floodable bridge-approach fill to the bridge across Kama River, erected by method called «Intensive technology», is presented. The method consists in the arrangement of drainage longitudinal and cross-section cuts for acceleration of consolidation of soils of the road bad and the base composed from the weak, strongly compressible water-saturated clay soils of different consistency.
MATHEMATICAL MODELING OF TRANSIENT EMERGENCY ELECTROMAGNETIC PROCESSES IN THE SYSTEM OF THE ELECTROMAGNETIC TRACTION DC. 2. SHORT CIRCUIT WITH ELECTRIC ROLLING STOCK
Authors: Mihalichenko P. E.
Published: May 2023

The article deals with the description of mathematical model of the system of traction electric power supply with load in the short circuit condition as well as the calculation results of this emergency process. The transition values as well as the character of their change, which can be used for detection of emergency processes, have been determined.
Study of the frame design of the trolley car subway to determine the reliability of its elements
Authors: Atlas N. V. , Donchenko O. V. , Vodjannikov Yu. Ya. , Shelejko T. V.
Published: May 2023

The results of analysis of operation conditions and causes for damaging of subway carriage underframes are presented, the assessment of results obtained is given, and the conclusions on reliability of separate underframe elements are made.
The work of the electromagnetic contactor with a minimum value of the voltage of the rings control the rolling stock of Railways
Authors: Marenych A. A.
Published: May 2023

The recommendations on securing of the main contacts with normalized opening and their pressing under minimal voltage (allowed in operation) in the control circuits have been developed.
Modeling of non-uniformity speed of the of crankshaft diesel engine
Authors: Bondar B. Ye. , Ochkasov O. B. , Chernjajev D. V. , Decjura O. Ya.
Published: May 2023

In the article the issues of diagnostics of diesels are considered; the nature of origin of irregularity of crankshaft rotation is considered. The results of simulation of irregularity of crankshaft rotation frequency for diesel of type 1D12 are presented. On the basis of simulation the dependences corresponding to the manifest of defects in operation of diesel units are obtained.
The organization of efficient system of holding insulation of traction engines and DC locomotives
Authors: Kapitsa M. I.
Published: May 2023

The mathematical model for determination of remaining resource of insulation of the locomotive hauling electric machines, taking into account its initial electric durability and minimum expenses on implementation of restoration works with the purpose of construction of the rational system of its maintenance, is offered.
OPTIMIZATION OF MODES OF DISSOLUTION OF THE COMPOSITIONS ON HUMPS
Authors: Bobrovskyi V. I. , Kudriashov A. V.
Published: May 2023

A method of solving the optimization problem for the mode of breaking up a train, allowing to take into account multiple divisions of its cuts, is developed.
FEATURES OF FOREIGN INVESTMENTS AND THEIR IMPACT ON THE ECONOMY OF THE STATE
Authors: Zhyzhko K. V.
Published: May 2023

In this article the importance of foreign direct investments forUkraineare analyzed and studied, and main investors are described. Also the role of transnational companies and theirs influence on recipient countries are studied, and the basic strategies on the markets of countries depending on theirs aims are analyzed. The advantages and disadvantages of foreign investments are described..
Investigation and prediction of the contact pairs wear of the current collection devices of electric transport
Authors: Sydorov O. A. , Stupakov S. A. , Salia I. L.
Published: May 2023

In the article the results of experimental research and calculation of wear of current collector system elements of electric transport are presented.
The analysis of technologies for the rational use of oily waste on railway transport
Authors: Zelenko Yu. V.
Published: May 2023

At railway enterprises year the great amount of oil-containing wastes is derived and accumulated annually, and the method of utilizing them depends on their concrete kind, amount and properties. In the article the basic methods of their rational utilization, the preliminary measures and basic techniques of regeneration of oil-contaminated soils and exhausted oils with possibility of returning them into the raw material resources base are considered.
Calculation of the area of the river accidental pollution
Authors: Pshinko A. N. , Beliaiev N. N. , Pokutnieva L. V.
Published: May 2023

The 2D numerical model was used to simulate the pollutant dispersion in river after an accident. The model is based on the equation of potential flow and the transport model. The numerical modeling results are presented.
Analysis of technologies for the foamglass production
Authors: Pshinko O. M. , Krasniuk O. V. , Hrebennikov V. M. , Shcherbak A. S.
Published: May 2023

The existing types of foamglass production technologies are considered in the article. Their advantages and demerits are shown.
The associated matrix are used to calculate the vibrations of continuous plates
Authors: Raspopov A. S.
Published: May 2023

The associated matrices are obtained and the technique of their application for calculation of continuous plate vibration with continuous distribution of mass and various boundary conditions is developed. The solutions for free vibrations of orthotropic plate taking into account the rotation inertia, shears and longitudinal forces are also presented.
Application of neural network technology to diagnose DC turnouts
Authors: Havryliuk V. I. , Dub V. Yu. , Malovichko V. V.
Published: May 2023

In the paper a procedure of diagnostics and check of failures of switches with DC electric engines on the basis of neural networks is proposed by the authors.
The development of mathematical model for the study of electromagnetic interference from the traction converters with asynchronous motor
Authors: Shcheka V. I. , Havryliuk V. I.
Published: May 2023

The mathematical modeling and circuit simulation of asynchronous propulsion drive unit with converters on IGBT transistors have been made. The possible noises appearing during drive’s operation have been determined. The spectral composition of phase current of the asynchronous engine has been obtained.
The definition of rational investment
Authors: Bosov A. A. , Drebot Kh. V.
Published: May 2023

The algorithm and computer software for solution of a problem of rational investment are proposed.
The improvement of financial responsibility in the calculations for international freight transport
Authors: Vnukova S. N. , Hnenyi N. V. , Teslenko T. V.
Published: May 2023

It is suggested to bring in changes into the Rules of Complex Payments applied by the states-participants of the Commonwealth of Independent States and the Baltic States in payments for international freight transportations.
A systematic approach to the justification of the spending level of the railway infrastructure
Authors: Mishchenko M. I.
Published: May 2023

The operation expenses of railway transport infrastructure and their dependency on the main indices of railways in the modern conditions are studied by means of a system approach.
Conception of the economy system construction of suburban passenger railway transport
Authors: E. I. Balaka  , O. V. Sementsova
Published: May 2023

The advisability of construction of economic system model of Ukrainian suburban passenger railway transport is grounded. The conceptual approach to its construction in present conditions is proposed. The components of this system are separated. The definitions of this system and its components are given.
Comparative criterion of alternative variants of the freight car park management
Authors: L. V. Martseniuk  , O. M. Pshinko
Published: May 2023

The article describes the optimal criterion for different variants of management of freight car stocks. The authors came to the conclusion that in order to achieve the biggest profit the variant of reformation with getting the greatest net discount income is most effective.
METHODS OF SPECTRAL ANALYSIS OF RANDOM PROCESS FLUCTUATIONS OF VOLTAGE AND CURRENT FEEDER TRACTION SUBSTATION DC
Authors: A. V. Petrov
Published: May 2023

The methods for determination of spectral composition of random functions of voltage and current of traction substation feeder are proposed. The low frequency components of their spectra (interharmonics) are obtained.
Operational reliability estimation method of switches and their components
Authors: V. V. Rybkin  , O. M. Bal  , I. O. Bondarenko
Published: May 2023

The technique of an estimation of operational reliability of switches and their elements is offered.
Non-linear vibration modeling with the help of functional series
Authors: Z. M. Hasanov
Published: May 2023

The algorithm of modeling the significantly nonlinear processes – «black boxes» – is offered. It uses functional series. The algorithm is described on the example of modeling of complex oscillations, which occur in acoustic flaw detection.
Comparative analysis of the experimantal research results of the subgrade strengthening by small-deformable layer
Authors: V. D. Petrenko  , V. T. Huzchenko  , O. L. Tiutkin  , A. M. M. Alkhdur
Published: May 2023

In the article the results of comparative analysis of variants of strengthening the ground bed by the smalldeformable layer are presented.
THE PRINCIPLES AND PROCEDURES FOR THE PLANNING AND ORGANIZATION OF INVESTMENT ACTIVITY IN ORDER TO ENSURE A COMPREHENSIVE RECONSTRUCTION
Authors: N. I. Verhoglyadova  , D. L. Levchynsky
Published: May 2023

The paper is devoted to an analysis of actual condition of a system of formation of investment projects on the complex reconstruction of territory of great cities as well as to the principles and order of planning and organizing the investment activity aimed at providing this task.
Work efficiency of the Ukrzaliznytsya signalization and connection sector
Authors: V. I. Romanko  , O. V. Romanko  , V. M. Stepanenko
Published: May 2023

In the article the analysis of signaling and communication facilities of Ukrainian railway transport is presented;the labour productivity and its change due to the influence of different factors are considered.
Propositions concerning structural transformation at the suburban passenger transportation sector of the Ukrainian railway transport
Authors: Yu. V. Miroshnychenko
Published: May 2023

In the article the alternative organizationally legal structure of management by suburban passenger transportations in the conditions of reformation of railway transport are offered. Namely, the creation of the Municipal transport enterprise in suburban passenger transportations in subsequent assumes achieving the maximal efficiency of functioning of passenger complex and reducing the unprofitability in this sector at the high-quality providing of solvent demand of population.
A simple method of determining the absolute slip of the asynchronous traction motor in order to receive the required moment
Authors: Yu. B. Napara  , S. O. Plitchenko
Published: May 2023

The results of a comparative analysis of formulas for calculating the mechanical characteristics of asynchronous traction motors are presented, as well as a new method of determining the absolute slip for the required moment is proposed.
THE RESULTS OF ANALYSIS OF EXPERIMENTAL RESEARCH PARAMETERS OF THE GEOTEXTILE-REINFORCED GROUND
Authors: V. D. Petrenko  , V. T. Guzchenko  , O. L. Tiutkin  , A. M. M. Alkhdour
Published: May 2023

In the article the results of analysis of parameters of experimental research of the geotextile-reinforced ground bed are presented.
THE MODEL DEVELOPMENT FOR EFFECTIVE PLANNING OF ENTERPRISE EXTENSION
Authors: T. F. Mykhaylova  , M. S. Karavaieva
Published: May 2023

The model of effective expansion of the enterprise production by using econometric modeling and dynamic programming is built.
Synergetic effect in the application of logistics methods management of traffic on the rail and other modes of transport
Authors: P. V. Bekh
Published: May 2023

For realization of considerable potential of synergetic approach in a logistic system the compromises among subjects providing harmonization of their contradictory economic interests are used.
Structural transformation during cold deformed carbon steel tempering
Authors: I. O. Vakulenko
Published: May 2023

The influence of parameters of degree of plastic deformation for 30…80 % and subsequent temper on the structure and yielding stress in the microyield region of preimproved carbon steels has been studied. The classification of dispersed phase of ferrite into two types containing the high angle boundaries and substructure boundaries respectively in relation to steels has been discussed.
Modern economic problems of railway branch passenger terminals
Authors: I. M. Aksenov  , A. V. Litkovska
Published: May 2023

The modern economic problems of passenger terminals of railway branch are shown. The ways of strengthening the financial stability of large passenger terminals and the passenger complex are offered.
Social orientation management of commercial banks activity
Authors: N. H. Shpankovska  , Yu. T. Trush  , A. V. Trush
Published: May 2023

The modern theoretical approaches to definition of essence of social activity of enterprises are analyzed. The directions of development of social activity of commercial banks are determined. The expedience of formulation of mission of commercial banks and general requirements it must meet to is grounded.
Analysis and estimation of the transport expenses under conditions of its reformation
Authors: Yu. S. Barash  , O. M. Pshinko  , I. N. Lomtieva
Published: May 2023

In the article the methods of analysis and estimation of expenses at railway transport enterprises aimed at management of the enterprise cash flows and all possible ways of grouping and cost sharing on the railway transport in the conditions of its reformation are considered.
Tank car construction refinment
Authors: A. N. Soberzhanskiy  , L. V. Tsyganskaya
Published: May 2023

The increase of volume and load-carrying capacity of tank cars is an urgent task for improving the efficiency of transportation of liquid bulk cargoes. Variants of the constructive and technical approaches, which allow increasing the specified indices, are considered. After the analysis the most rational constructive scheme meeting the modern requirements for tank cars and allowing to raise their productivity is chosen.
Efficiency determination of freight and passenger traffic division according to the expenses criteria for superstructure maintenance and repair
Authors: M. B. Kurhan  , M. A. Zaiats
Published: May 2023

The influence of increase of trains traffic speed on the expenses for maintenance and repair of the superstructure is considered.
Dynamic work investigation of the ferroconcrete bridges with rail track eccentricity
Authors: O. S. Raspopov  , V. Ye. Artomov  , S. P. Rusu
Published: May 2023

The mathematical model of taking the account of eccentricity of a railway track on the span of railway bridges is proposed. The significant effects of the railway track eccentricity on the character of railway spans vibrations at different speeds of moving a locomotive are investigated.
Investigation and techno-economic basis of introduction expediency of complex gabion construction production
Authors: A. V. Radkevych  , Yu. M. Horbatiuk  , Y. M. Yevin  , S. O. Yakovliev
Published: May 2023

The modern approaches to the solution of problem of expedience of introducing the complex production of mesh structures on the base of structural subdivisions of the Government Special Service of Transport are examined.
Operational researches of track gauge and positions in the terms of switch lateral direction
Authors: V. V. Rybkin  , K. L. Kalenik
Published: May 2023

The results of operational research of lateral direction of switches of type P65 mark 1/11-1/9 on reinforced concrete bars on the track gauge and the direction in plan are presented in the article. The characteristic parts of the lateral direction in terms of the influence of geometrical position on the interaction with rolling stock are determined.
Energy figures of mechanic method electric loss compensation in hauling electric motor at their mutual loading
Authors: A. M. Afanasov
Published: May 2023

The analysis of power indices of process of compensation of magnetic and mechanical losses in the charts of mutual loading of hauling electric motors with the use of electric power source is resulted.
THE CHANGE IN ELEVATION OF THE OUTER RAIL ALONG THE CURVE
Authors: I. P. Korzhenevych  , S. A. Lykova  , A. A. Mamytko
Published: May 2023

The possibility of changing the outer rail superelevation along constant radius curves is considered.
THE INTRODUCTION OF RESOURCE-SAVING TECHNOLOGIES FOR THE SEPARATION OF FREIGHT AND PASSENGER TRAFFIC
Authors: M. B. Kurgan  , N. P. Khmelevska  , M. M. Cherniakov
Published: May 2023

The analytical dependences of electric energy losses on average track section gradient values, train mass and freight traffic density are determined.
IMPACT OF INTERMETALLIC PHASES ON THE ALUMINIUM ALLOYS EROSION RESISTANCE
Authors: A. E. Ostrovska  , I. P. Volchok
Published: May 2023

Investigation of the influence of intermetallic phases on the mechanism of fatigue fracture of the secondary aluminum alloys was made.
THE COMMERCIAL BANK AS NETWORK STRUCTURE
Authors: D. O. Dyl
Published: May 2023

The article examines the problems of the modern enterprise as a network structure that meets the increasing processes of globalization and the rise of postmodern trends. The definition of the term «a network of commercial bank» and the main characteristics of such a definition are given.
Analysing longitudinal loading of heavy trains during braking
Authors: E. P. Blokhin  , L. V. Ursuliak  , Y. N. Romaniuk
Published: May 2023

The description of the developed computer system possibilities and its use to solve problems of motion safety and stability is given.
Buildings' characteristics of magnet-levitated train operation
Authors: V. A. Poliakov  , N. M. Khachapurydze
Published: May 2023

Factors, which complicate the situation of magnetic levitated train motion, are revealed and described. Influence of these complications on motion problems of a train is noted. The impossibility of parrying of the described collision without a radical rising of dynamic resources of a train is stated. It is shown that the achievement of controllability of the system is possible only if the overcoming of surplus degrees of its freedoms is achieved. The rational way of such an overcoming is shown. The technique of construction of the train motion in unpredictable conditions, which considers features of such a construction, is developed.
Upgrading exploitation axials’ pins qualities of mounted wheels through hard facing
Authors: L. M. Lubenska  , P. V. Kolodiazhnyi
Published: May 2023

The analysis of destruction causes of wheelset axles in service is performed. Reducing of depth of cavities of a rough surface is 3 times with a combination of the finish turning and vibration-formation processing. The effect of hardening the surface layer to a depth of 0.15 mm under the influence of vibration with frequency of 43 Hz and amplitude of 5·10 –3 m is exposed. The effect of reduction of microhardness of the hardened surface layer with increasing temperature and duration of exposure to vibration is detected.
System of distributed power with drop link of overfrequency for electric railways
Authors: U. P. Honcharov  , N. V. Panasenko  , V. V. Zamuruiev  , V. V. Ivakhno  , S. U. Krivosheyev  , U. V. Chursina  , M. V. Danilov  , V. H. Sychenko  , V. U. Ivanov
Published: May 2023

The system under consideration is the PDU contact network of high-voltage direct current from the longitudinal line at the voltage of the order of units of kHz allowing to reduce drastically the mass of power electromagnetic elements in converters and to expand the opportunities of controlling the power supply system.
Specification method is for actuation setpoint of protectors from short completions in power circuits of electric motive power
Authors: O. O. Karzova
Published: May 2023

The issue of determination of minimum value of triggering setpoint by the rate of increasing the current for the short-circuit proof equipment in power circuits of the electric-traction rolling stock is considered in the article.
Some directions for development of servicing system and repair in overhead one
Authors: O. S. Kuchmii  , O. M. Bogutenko
Published: May 2023

In the article the grounds for the necessity of improving the existing system of technical maintenance and repair  on the basis of technical diagnostic devices of contact network based on reducing the cost of repairs and introducing new ways to influence the willingness to bear heavy loads are presented.
Changing of the strain – stress state of base soil structure with deep cranks device
Authors: N. V. Zuivska  , S. A. Dvirnyk  , V. E. Hubashova  , U. V. Volyk
Published: May 2023

The article presents a comparison of modification of the strained-and-stressed state for the soil and in the elements of barrier structure during carrying out a deep excavation. The results are given using two different models of the soil in computation software PLAXIS.
The mathematic simulation process of toxic gas wicking into the room through the ventilation system on the territory of chemically hazardous object during the emergency
Authors: M. M. Biliaiev  , L. F. Dolina  , O. Yu. Gunko
Published: May 2023

The 3D-numerical model to simulate the toxic gas dispersion on industrial sites and inflow of toxic gas into the industrial room after accident ejections was developed. The model is based on the K-gradient transport model and equation of potential flow. The results of numerical experiment are presented.
The mine drainages diffusion and physical simulation are in area of the Black sea
Authors: M. M. Biliaiev  , P. S. Kyrychenko
Published: May 2023

An experiment to model the mine waste waters discharge into the Black Sea was carried out. The experiment  was held in the water channel. Some experimental results are presented.
The improving technology of liquidation aftermath outages of oil products during the transportation
Authors: I. Ya. Peresta  , L. O. Yaryshkina  , S. I. Muzykyna  , Yu. V. Zelenko  , I. L. Zhuravel
Published: May 2023

In the article the ways of improving the technology of liquidation of consequences of petroleum products losses during transportation are discussed.
Structural changes have in complex alloying white iron during destabilizing heating
Authors: U. H. Chabak  , V. H. Yefremenko  , R. R. Stanishevskyi
Published: May 2023

The data concerning the kinetics of secondary carbides precipitation and hardness of high-chromium white cast iron during destabilization are presented.
Evolution of insurance definition
Authors: V. A. Gorb  , V. V. Smoliaska
Published: May 2023

In the article the evolution of the concept of insurance from the earliest forms to contemporary ones is shown.  The development of insurance in Ukraine is demonstrated. A review of transformation of the insurance concept is presented in tabular form.
Determination of fracture mechanics parameters for bodies gyration in unsteady dynamic problems
Authors: V. A. Bazhenov  , I. I. Solodei  , M. O. Vabishchevych
Published: May 2023

On the basis of semi-analytical final elements method data validity research and research of effective determination of fracture mechanics parameters for bodies of revolution in non-stationary dynamics problems were conducted. New method of J-integral calculation and crack approximation under dynamic impact are presented.
Studies of metals beams in long-term storage
Authors: Ya. A. Balabukh
Published: May 2023

Results of metal researches of long-term storage beams are considered. It is determined that the steel of beams meets the requirements of Norms. Their acceptability for construction of bridges is established.
Evaluation of the technical state of ferroconcrete railway bridges
Authors: A. V. Harmash  , V. I. Solomka  , O. V. Horbova
Published: May 2023

Methods of technical state estimation, such as method of classification, mark estimation and law of probability method, are considering in this article. In order to receive maximal precise estimation it is proposed to use the complex way, which includes all three methods.
Reinforced concrete slab of ballastless bridge with stress-strain state
Authors: O. L. Zakora  , S. V. Kliushnyk  , H. O. Lynnyk  , M. P. Dytynenko  , D. L. Ivashkevych  , O. A. Zabyiaka
Published: May 2023

In the paper the influence of basic power factors on the stained-and-stressed state of reinforced-concrete tiles of  BMP is considered. The recommendation for the increase of its operating qualities are given.
The profiled flooring is used during the reconstruction and repair of small bridges
Authors: V. P. Kozhushko  , S. N. Krasnov  , E. S. Krasnova
Published: May 2023

The review of plate span structures constructions is carried out. The perspectiveness of application of plate span structures with outer reinforcement in the form of profiled steel sheets is paid attention to. The distributive capacity of plate span structures with application of profiled steel sheets is investigated.
A circular stamp contactly communicates with a layer of a non-ideal thermal contact
Authors: B. S. Okrepkyi  , M. Y. Shelestovska
Published: May 2023

Solution of the axis-symmetric contact task of thermo-elasticity of the hot cylinder circular punch stress on the elastic isotropic layer taking into account a non-ideal heat contact between punch and layer is built. Formulas for determination of the temperature field and normal stress in the contact area are obtained. The effect of the contact elasticity on the temperature and normal stress distribution is investigated. Investigation was made on the influence of the contact conductivity on distributing of the temperature fields and normal stress in the area of contact of two bodies.
Composite steel and concrete beams, I-beams are in the supercritical stage of concrete working, their strength’s analysis of normal sections
Authors: A. M. Pavlikov  , O. A. Krupchenko
Published: May 2023

The article deals with the procedure of strength calculation of normal section reinforced concrete structures; the procedure is based on the elective diagram of concrete deformation and is adapted to the calculation of still reinforced concrete beams. The experimental data comply with the theoretical ones.
Double computation schemes of solution unlinear integro-partial differential equations with the main error estimation
Authors: R. Ya. Pelekh  , Yu. Yu. Luchko
Published: May 2023

The two-side methods of the second order of accuracy are constructed. The formulas give an opportunity to receive upper and lover approximation at each point to the exact solution and define the value of the main error without referring to the right part of differential equation.
The complex analysis of the column station with depth variation
Authors: V. D. Petrenko  , O. L. Tiutkin  , V. I. Petrenko
Published: May 2023

In the article the results of complex analysis of the columnar station with variation of depth contour interval with research of mobile loading influencing on ceiling are represented.
The mechanical specifications of titanium alloyes with fixed surface layers
Authors: I. M. Pohreliuk  , O. V. Tkachuk  , A. V. Samborskyi  , Z. O. Siryk
Published: May 2023

Influence of oxinitriding and boriding on the mechanical properties (ultimate strength to destruction at uniaxial tension, plasticity, tendency to delayed destruction, fatigue resistance at bending with rotation, fatigue life at lowcycle pure bending) of titanium alloys is studied.
The problem’s analysis to define bridges’ defects by vibration monitoring methods
Authors: V. P. Redchenko  , Y. V. Крючков  , T. V. Redchenko
Published: May 2023

The article deals with the results of the practical and theoretical researches of impact of structural damage on its modal parameters.
Thermoeffective foundation blocks are used for heating basements and socular rooms
Authors: O. V. Semko  , O. I. Fylonenko
Published: May 2023

Possibility of use of thermoeffective base blocks for heated cellars is investigated. Temperature distribution on a thickness of the given design is calculated. It is investigated humid a mode of thermoeffective base blocks.
The components definition of the strain-stress state and computation on a resistance of the Tube confined concrete with local power exposures
Authors: O. P. Sinelnyk
Published: May 2023

Method of the determination component tense-deformed condition concrete tube and its calculation on toughness was presented. The presented algorithm is founded on the main equations of the linear theory to bounce, iterative method to variable feature to bounce and on method final element.
Numerical analysis of steel concrete slabs
Authors: E. D. Chykhladze  , L. V. Haponova
Published: May 2023

Numeral realization of temperature-humidity of the fields is conducted in a steel-concrete flag and the calculation of the non-stationary humidity mode of modern non-load-bearing constructions is executed.
Actual questions about using inventory rolling stock and its own one by carriages during transportation by Ukrainian railways
Authors: M. H. Belynskaia
Published: May 2023

The analysis of freight wagons in various forms of ownership was done. The issue of the actual carriage cost reimbursement by carriage component in the tariff on the basis of accounting data was investigated.