bluuebunny/crossref_metadata_2025 huggingface dataset:
The impact of parental complaints on teachers working within Scottish schools during Covid-19
Authors: Williams Jane , Lord-Watson Kat , Vettini Amanda
Published: June 2023

This exploratory research examines the impact of everyday parental complaints on teachers working in Scottish Schools during the Covid-19 pandemic. Through interviews with 18 teaching professionals, our findings demonstrate that parental complaints both before and during Covid-19 are a feature of school life, even if they were not conceptualised in that way by teaching professionals. We found that teaching professionals have become accustomed to the everyday informal complaints parents voice about schools to the point only serious situations or repeat complaints were considered to be raising a ‘complaint’. Formal complaints procedures were seen as being a barrier to maintaining good relationships with parents. Complaints during Covid were rationalised as coming from anxious parents due to the pandemic, or a small group of parents with unrealistic expectations, or outdated understandings of education. Despite the fact our research was about complaints experienced by teachers during the pandemic, our respondents frequently referenced complaints prior to this, emphasising the impact complaints can have long after they have been made, which resonates with other research on the long-term practical and emotional impact of complaints.
Neuromedin B-Expressing Neurons in the Retrotrapezoid Nucleus Regulate Respiratory Homeostasis and Promote Stable Breathing in Adult Mice
Authors: Souza George M.P.R. , Stornetta Daniel S. , Shi Yingtang , Lim Eunu , Berry Faye E. , Bayliss Douglas A. , Abbott Stephen B.G.
Published: June 2023

Respiratory chemoreceptor activity encoding arterial Pco2and Po2is a critical determinant of ventilation. Currently, the relative importance of several putative chemoreceptor mechanisms for maintaining eupneic breathing and respiratory homeostasis is debated. Transcriptomic and anatomic evidence suggests that bombesin-related peptide Neuromedin-B (Nmb) expression identifies chemoreceptor neurons in the retrotrapezoid nucleus (RTN) that mediate the hypercapnic ventilatory response, but functional support is missing. In this study, we generated a transgenicNmb-Cre mouse and used Cre-dependent cell ablation and optogenetics to test the hypothesis that RTNNmbneurons are necessary for the CO2-dependent drive to breathe in adult male and female mice. Selective ablation of ∼95% of RTNNmbneurons causes compensated respiratory acidosis because of alveolar hypoventilation, as well as profound breathing instability and respiratory-related sleep disruption. Following RTNNmblesion, mice were hypoxemic at rest and were prone to severe apneas during hyperoxia, suggesting that oxygen-sensitive mechanisms, presumably the peripheral chemoreceptors, compensate for the loss of RTNNmbneurons. Interestingly, ventilation following RTNNmb-lesion was unresponsive to hypercapnia, but behavioral responses to CO2(freezing and avoidance) and the hypoxia ventilatory response were preserved. Neuroanatomical mapping shows that RTNNmbneurons are highly collateralized and innervate the respiratory-related centers in the pons and medulla with a strong ipsilateral preference. Together, this evidence suggests that RTNNmbneurons are dedicated to the respiratory effects of arterial Pco2/pH and maintain respiratory homeostasis in intact conditions and suggest that malfunction of these neurons could underlie the etiology of certain forms of sleep-disordered breathing in humans.

SIGNIFICANCE STATEMENTRespiratory chemoreceptors stimulate neural respiratory motor output to regulate arterial Pco2and Po2, thereby maintaining optimal gas exchange. Neurons in the retrotrapezoid nucleus (RTN) that express the bombesin-related peptide Neuromedin-B are proposed to be important in this process, but functional evidence has not been established. Here, we developed a transgenic mouse model and demonstrated that RTN neurons are fundamental for respiratory homeostasis and mediate the stimulatory effects of CO2on breathing. Our functional and anatomic data indicate thatNmb-expressing RTN neurons are an integral component of the neural mechanisms that mediate CO2-dependent drive to breathe and maintain alveolar ventilation. This work highlights the importance of the interdependent and dynamic integration of CO2- and O2-sensing mechanisms in respiratory homeostasis of mammals.
Dormancy Behaviour and Effectiveness of Dormancy Breaking Methods in Cucumber Seeds (Cucumis Sativus)
Authors: Haq Nasrul , Ilyas Satriyas , Suhartanto M. Rahmad , Purwanto Y. Aris
Published: June 2023

This study aimed to examine the dormancy behaviour and effectiveness of various dormancy breaking treatments on cucumber seeds. Freshly harvested cucumber seeds of varieties CU-1047 and CU-1051 were extracted, dried and stored for eight weeks at ambient temperature. The stored seed
lots were tested for seed germination once a week and hormone analysis (ABA, GA, zeatin and kinetin) every two weeks. In a second experiment, dormancy breaking methods using dry heat treatment (DHT) at 36, 50 or 80°C for various lengths of time. Chemical treatments were also tested, with
a 24-hour soaking time using GA3, KNO3 or ultra-fine bubble (UFB) water. The results showed that the dormancy persistence in both varieties was three weeks after the seeds were harvested, by which time germination reached more than 85%. The decrease in ABA content during
the storage period correlated with an increase in seed germination. The most effective methods of breaking dormancy were dry heat at 80°C for 24 hours (highest germination: 62%) and a DHT chamber (59%) compared with control (1%). An alternative method was soaking the seeds in 1% KNO3
followed by drying to the initial moisture content (55% germination). UFB water was not effective in breaking the dormancy of cucumber seeds.
Anais do XXVI Congresso Nacional de Criminalística (CNC2022)
Authors: RBC Corpo editorial da
Published: June 2023

Comissão OrganizadoraPresidente da Associação Brasileira de Criminalística: Dr. Leandro Cerqueira Lima – PCP/PRPresidente do Evento: Dr. Eduardo Becker Tagliarini – SPTC/SP e SINPCRESPCoordenador Geral: Dr. Claudemir R. Dias Filho – SPTC/SP e SINPCRESPSecretários Gerais: Dr. Ivan Ribeiro Candeias – SPTC/SP e SINPCRESP e Dra. Karla Campos –SPTC/SP e SINPCRESPSecretário de Finanças: Dr. Rodney Ramos – SPTC/SP e SINPCRESPSecretário de Negócios: Dr. Cleber Müller – IGP/RSConselho Consultivo: Dr. João Victor Franco – SPTC/GO e ASPEC/GOCoordenação Científica: Dra. Camila Delanesi Guedes – SPTC/SP e SINPCRESP eDra. Christiane Freitas – SPTC/SP e SINPCRESPEditor da Revista Brasileira de Criminalística: Dr. Juliano de Andrade Gomes – PC/DF
Current concepts in chronic traumatic anterior shoulder instability
Authors: Bauer Stefan , Collin Phillipe , Zumstein Matthias A , Neyton Lionel , Blakeney William G
Published: June 2023

Chronic traumatic anterior shoulder instability can be defined as recurrent trauma-associated shoulder instability requiring the assessment of three anatomic lesions: a capsuloligamentous and/or labral lesion; anterior glenoid bone loss and a Hill–Sachs lesion.

Surgical treatment is generally indicated. It remains controversial how risk factors should be evaluated to decide between a soft-tissue, free bone-block or Latarjet-type procedure.

Patient risk factors for recurrence are age; hyperlaxity; competitive, contact and overhead sports. Trauma-related factors are soft tissue lesions and most importantly bone loss with implications for treatment.

Different treatment options are discussed and compared for complications, return to sports parameters, short- and long-term outcomes and osteoarthritis.

Arthroscopic Bankart and open Latarjet procedures have a serious learning curve. Osteoarthritis is associated with the number of previous dislocations as well as surgical techniques.

Latarjet-type procedures have the lowest rate of dislocation recurrence and if performed correctly, do not seem to increase the risk of osteoarthritis.
LAS MUJERES DEL MERCADO. ABASTO, EMPRENDIMIENTO Y TRABAJO FEMENINO EN LA VALENCIA DEL SIGLO XVIII
Authors: Muñoz Navarro Daniel
Published: June 2023

Este artículo trata de reconstruir el rol jugado por las mujeres en el comercio alimentario valenciano a lo largo del siglo XVIII, un fenómeno estructural en las ciudades europeas del periodo preindustrial. Cientos de mujeres se ganaron la vida en los espacios públicos de la ciudad, desempeñando una amplia gama de trabajos, entre los que sobresalía la venta y reventa de frutas, hortalizas y otros géneros de abasto. Ahora bien, esta presencia femenina, reflejada en gran parte de las representaciones coetáneas de plazas y mercados, resulta esquiva en las fuentes de archivo, quedando ensombrecida frente a la preponderancia masculina en el negocio del aprovisionamiento urbano. Sin embargo, pese a los tópicos sobre la invisibilidad del trabajo femenino, no todos los fondos documentales son tan opacos y el rol de las mujeres, al menos en el ámbito comercial, puede reconstruirse a partir de aquellas series documentales más conectadas con la realidad cotidiana de los espacios urbanos. Para el caso valenciano, hemos recurrido a la documentación del Tribunal del Repeso, institución municipal encargada del control diario del funcionamiento de la plaza del mercado y otros espacios vinculados con el abasto urbano; combinando estos con otra documentación de carácter normativo.
Víctima, Resiliencia y Verdad en el sistema penal, constructo desde la Corte Constitucional colombiana
Authors: Archila Antolínez María Elsa
Published: June 2023

La Constitución Política de Colombia, lleva implícito el compromiso del Estado social y democrático de derecho, que impone respetar, proteger y garantizar los derechos de las víctimas; prevenir su vulneración; tutelar sus derechos de manera efectiva; garantizar la reparación y la verdad; investigar, juzgar y en su caso sancionar las graves violaciones a los Derechos Humanos. La investigación social documental, de tipo cualitativa; condensa los principales pronunciamientos de la Corte Constitucional, en un contexto de justicia transicional, que reconocen a las víctimas intervenir en el proceso penal; contar con una tutela judicial efectiva; recibir medidas de protección; conocer la verdad; que se haga justicia y la reparación del daño que le permita la resiliencia, en garantía hacia una paz duradera.
Manifestaciones públicas de afecto por parte de personas del mismo sexo, análisis de casos concretos: sentencias de la Corte Constitucional colombiana T-268 de 2000 y T-909 de 2011
Authors: Ramos Pallares Leonardo Camilo
Published: June 2023

La Constitución Política de Colombia, consagra la dignidad humana, el libre desarrollo de la personalidad, la libertad individual y la igualdad, como derechos fundamentales, permitiendo a todos los colombianos y en especial a las minorías, desarrollarse libremente y materializar su plan de vida. Lo anterior cobra una importancia significativa ya que permite la concreción de planes vitales que difieren de las posturas mayoritarias, garantizando así, restricciones mínimas con un máximo de libertades. Para la elaboración de este escrito y la fundamentación teórica  de las expresiones públicas de afectos de personas homosexuales (entendiendo las demostraciones  de afecto y cariño como inherentes a la condición humana), se estudió la jurisprudencia de la Corte Constitucional relacionada con el tema, en especial las sentencias   T-268 de 2000 y T-909 de 2011, llegando a concluir, que la homosexualidad y las derivaciones que atienden a esta opción de vida, están protegidas desde la constitución y  constituyen una opción legítima dentro del ordenamiento jurídico colombiano en razón a su nexo inescindible con los derechos fundamentales contemplados en la Carta Constitucional que en el comienzo de este acápite se refieren.
¿Estamos manejando correctamente los recursos marinos en Costa Rica?
Authors: Jiménez Ramón Jorge A.
Published: June 2023

Abstract

The exploitation of coastal-marine resources has occurred in our coasts since about 12 000 years ago. This activity has been intense and careless regarding to the well-being of the resource being exploited. Consequently, many of the resources have collapsed throughout the centuries. Pearls, tortoiseshell, mother-of-pearl, turtles, mangrove-cockle, and many other species have stopped being commercially viable. Presently, fisheries, formerly believed inexhaustible, also show unequivocal signs of overexploitation.  Far from improving, our relationship with marine resources has exacerbated. The exploitation increment, combined with contamination and ocean warming, have deteriorated these resources. Essential biomass and population status analyses continue to be neglected, even after the founding of INCOPESCA in 1994. Total ship landings, between 2000-2015 have decreased 45 % impacting particularly the artisanal fleet.  The number of fishing vessels have gone from 5 000 in 2010 to less than 2 000 four years later and the number of jobs in the sector has decreased by 50 %. It is urgent to have an institution able to generate information that allow us to determine the level and manner of this exploitation. Such management needs to be independent of economic and political interests and should be coupled with an efficient and effective administration, together with strict control and surveillance of this activity.
Claves experimentales para la interpretación del hueso retocado
Authors: Dapena Albiach Laura , Baena Preysler Javier
Published: June 2023

A lo largo de las campaña de excavación realizadas en el yacimiento cántabro Paleolítico Medio de la Cueva de El Esquilleu, Cantabria, y en especial en la campaña del año 2002, han sido localizados algunos fragmentos óseos cuyos atributos macroscópicos permitieron inicialmente encuadrarlos como piezas óseas retocadas. Concretamente en el nivel XX, contamos con uno de los ejemplos más claros, un fragmento de diáfisis de meso fauna (posiblemente capra pyrenaica), clasificado como raedera convexa.La pieza presentaba en uno de sus filos longitudinales una serie de extracciones aparentemente de origen antrópico, desvinculadas de las acciones alimentarias (Figura 1), que morfoló- gicamente recordaban al retoque realizado en piedra. Para reforzar o descartar esta hipótesis relativa a la identificación de posibles útiles en hueso, y teniendo como punto de partida un conjunto limitado de piezas procedentes del yacimiento, creímos interesante iniciar un proceso de experimentación.
Adsorption behavior of Cd2+, Pb2+, and Ni2+ from aqueous solutions on cellulose-based hydrogels
Authors: Zhou Yiming , Zhang Liangliang , Fu Shiyu , Zheng Liming , Zhan Huaiyu
Published: June 2023

Removal of Cd2+, Pb2+, and Ni2+ from aqueous solutions using cellulose-graft-acrylic acid (C-g-AA) hydrogels was investigated. Various factors affecting the adsorption capacity, such as pH, time, initial ions concentration, and competitive ions, were tested. The results showed that the adsorption of hydrogels was very pH dependent, and maximum adsorption was obtained at a pH of 5.0. The adsorption capacities of hydrogels for the heavy metal ions were 562.7 mg/g (Cd2+), 825.7 mg/g (Pb2+), and 380.1 mg/g (Ni2+), respectively. The adsorption behavior can be very well described by the pseudo-second-order kinetic model and the Langmuir isotherm model. The observed affinity order of competitive ions adsorption is Pb2+>Ni2+>Cd2+ in mmol/g. The hydrogels can be regenerated after releasing heavy metal ions and reused three times with 15% loss of adsorption capacity. Scanning electron microscope (SEM) images and Fourier transform infrared spectroscopy (FTIR) spectra before and after ion adsorption on the hydrogels revealed that the complexation between heavy metal ions and carboxyl groups on hydrogels was the main adsorption mechanism.
Rejuvenating a failing heart: A case report
Authors: Mohapatra Ashish K , James Cyril
Published: June 2023

Heart Failure (HF) is a complicated, fatal medical condition that poses a severe threat to human life. It is a complex ailment that can lead to death and is associated with high healthcare costs, significant morbidity and mortality rates, and a reduction in functional capacity and quality of life. Recent data analysis reveals that approximately 64million people worldwide are affected by HF.1 Patients with HFrEF can benefit from cardiac contractility modulation (CCM), a revolutionary device-based treatment. In patients with HFrEF, CCM treatment has been associated with an improvement in exercise tolerance, an improvement in quality of life, a decrease in HF hospitalizations, and a reversal remodeling of the left ventricle. In this instance, we describe the therapeutic benefit of CCM in an elderly individual with advanced HFrEF triggered by ischemic dilated cardiomyopathy who frequently required hospitalization for heart failure-related issues and had a low quality of life despite receiving the best possible guideline-directed medical therapy (GDMT).
Liquid crystals as additives in solid polymer electrolytes for lithium metal batteries
Authors: Álvarez Moisés Isaac , Innocenti Alessandro , Somville Mathilde , Notredame Benoît , Passerini Stefano , Gohy Jean-François
Published: June 2023

The forefront of research for new electrolyte materials for tomorrow’s electrochemical energy storage technologies is based on thoroughly designed molecular architectures. Here, liquid crystals (LCs) mixed with poly(ethylene-oxide) (PEO) and lithium salts are proposed as solid polymer electrolytes (SPEs) for application in lithium-metal batteries. The PEO matrix comprises the LC, which gives orientational properties, whereas the PEO chains with lithium salts are responsible for the ionic conductivity. N-(4-Methoxybenzylidene)-4-butylaniline (MBBA) is used as proof-of-concept and new LC molecules are developed for further research. Ionic conductivities (7·10–4 S·cm−1 at 40 °C) up to three times higher than the reference without LC are achieved. In addition, the SPEs are characterized electrochemically, thermally and by polarized optical microscope demonstrating the preservation of the liquid crystalline behavior even after mixing with PEO and lithium salts.

Graphical abstract
Contribution of advanced edge detection filters for the structural mapping of the Douala Sedimentary Basin along the Gulf of Guinea
Authors: Gautier Kamto Paul , Oksum Erdinc , Thanh Pham Luan , Kamguia Joseph
Published: June 2023

The Douala sedimentary basin (DSB) is an area of interest because of its hydrocarbon potential. Geophysical investigations in this basin are necessary to understand its structural features better. In this study, we aimed to highlight the major lineaments of the DSB by interpreting gravity data using advanced edge detection filters based on various combinations of the horizontal and vertical gradients of the field, namely the total horizontal gradient (THG), analytical signal (AS), theta map (TM), gradient amplitude of the vertical derivative (THG_VD), the tilt angle of the total horizontal gradient amplitude (TAHG) and a novel edge detector based on the soft sign function (SF). These filters were first tested on synthetic data of a simple density model to examine their effectiveness. The results show that the edges of the model structures can be visualized with greater accuracy using the TAHG and SF filters compared to the results from the others.

Further, although the TAHG and SF filters produced good results in identifying shallow and deep structures, solutions from SF proved to be better at delineating edges. Next, we applied these edge detection filters to the residual gravity anomaly of the study area obtained after a filtering process on the complete Bouguer anomaly. The SF filter clearly and accurately identifies the major structural features. The existence and location of previously unidentified lineaments have been shown. Most of the lineaments of the DSB extracted by this study provide geometric information on the lateral distribution of depositional successions filling the basin. The structural features are mainly concentrically from the volcanic center of Mount Cameroon and show that the DSB has probably been affected by earthquakes from the permanent activities of the Cameroon volcanic line since the Cretaceous. The highlighted lineaments of the DSB obtained from this study may shed light on future studies to improve mineral/hydrocarbon exploitation and update the area's geological/tectonic information.
ANALYSIS OF TEST RESULTS OF THE ENBANKMENT REINFORCEMENT WITH REINFORCED SOIL-CEMENT PILES
Authors: KRYSAN V. I. , KRYSAN V. V. , PETRENKO V. D. , TIUTKIN O. L.
Published: June 2023

Purpose. The purpose of the work is to analyze the results of the test of the embankment reinforcement with reinforced soil-cement piles. Methodology. An analysis of the ground reinforcement situation was carried out with the definition of modern trends in the use of geosynthetic materials and soil-cement piles. An algorithm for strengthening the embankment with reinforced soil-cement piles using a special square bit has been developed and implemented in practice. The load-bearing capacity of reinforced soil-cement piles was determined by reasoned selection of the structure, soil base, material, depth of pile laying in accordance with engineering and geological conditions, the structural scheme of the building and the method of their arrangement. Findings. 6 piles with a length of 21 m to 23 m were tested. During the manufacture of piles Nos. 1, 4 and 6, the length of which was 22...23 m, during drilling it was found that massive monolithic granite lies at their base (the granite was sunk by 0.5 m), the presence of cracks in which was not fixed. Piles Nos. 2, 3, 5 had cracked granites as their base, they were also deepened by 0.5 m. For these reinforced soil-cement piles, the values of the vertical displacements of the pile during its loading and unloading in stages were obtained. The calculated pressing load on the tested pile ranges from 268.3 t·s to 275.0 t·s. Originality. It consists in obtaining dependences of settlements of reinforced soil-cement piles, created on the basis of jet mixing technology, during their testing in loading and unloading modes. Practical value. It was determined that by changing the stiffness of the embankment, since soil-cement reinforced elements can be manufactured with a deformation modulus of 300...600 MPa, the problem of its strengthening is solved. Practically, it is possible to reduce the difference in the stiffness of the artificial structure and the structure of the track superstructure, which will allow eliminating ballast recesses.
ANALYSIS OF ELECTROMAGNETIC INTERFERENCE OF TRACTION POWER SUPPLY ON THE RAIL WORK AND COMMUNITY AND MODELING THE FLOW OF TRACTION CURRENT IN THE RAILS
Authors: Havryliuk V. I.
Published: June 2023

On the basis of literature data analysis, an updated mathematical model has been developed, which describes electromagnetic processes in rail circuits during movements of electrified rolling stock. The model takes into account inductive influence of current in the contact wire and the current flowing in the ground. Calculations have been provided of reverse tractive current in the rails and the potential of rails on the section between the locomotive and tractive substation. The results of the analysis have been presented.
FUNCTIONAL DIAGRAM OF THE AUTOMATIC CONTROL SYSTEM FOR THE ELECTRIC REGENERATIVE BRAKING FOR DC LOCOMOTIVE WITH STATIC CONVERTERS
Authors: Visin M. H. , Vlasenko B. T. , Kiiko A. I.
Published: June 2023

A functional chart of DC electric locomotives recuperative braking automatic control system, with power supplies of excitation windings from a static activator, has been developed.
PARAMETRIC PROBABILISTIC FORECASTING THE RELIABILITY OF JOURNAL-BOXES OF ELECTRIC LOCOMOTIVE
Authors: Kostin M. O. , Artemchuk V. V.
Published: June 2023

The authors have performed the probability forecasting of parametrical reliability of wheelset axlebox frames of electric locomotives according to criterion of wear. The law of distribution of the frame diameter value D at an arbitrary value of the locomotive run l has been found. A probability forecast of axlebox frames failure in different types of electric locomotives has been performed for the run value of up to TR 3, that is Lk-L0. The calculations have been made for new frames, restored by surfacing and iron plating.
MODEL OF DISTRIBUTION PLAN OF EMPTY CARS FOR LOADING
Authors: Kukushkina I. M.
Published: June 2023

An economic and mathematical model of empty carflow rational regulation has been offered, with account of expenditures, related to the time losses by cars and the freight in a pre-loading demurrage, and also the costs of the cars moving from the points of loading to those of unloading.
THE DEFINITION OF THE FUNCTION OPERATING TIME INSULATION TED ON EXPERIMENTAL DATA
Authors: Kapitsa M. I.
Published: June 2023

The article examines one of the options of determining the function of insulation resistance in tractive electric motor excitation windings, according to the values of reverse voltage, based on approximation of functions and the theory of technical objects recovery.
ASSESSMENT OF SAFETY FACTORS OF ENDURANCE AND THE EQUIVALENT OF DESTROYING THE ABILITY OF CYCLIC STRESSES ACCORDING TO FULL-SCALE TESTING OF ROLLING STOCK
Authors: Horobets V. L.
Published: June 2023

With the aim of precise definition of endurance margin factors of the rolling-stock carrying structures and calculation of amplitudes of symmetric cycles of their loading, equivalent in their destructibility, a calculation model has been offered, which takes into account the distribution of the loading cycle parameters of the carrying structure in operational conditions.
ECONOMIC AND LEGAL PROBLEMS OF FORMATION OF A QUALITATIVELY NEW SYSTEM OF TRANSPORT COMMUNICATIONS OF THE CIS IN THE CONDITIONS OF FORMATION OF MODERN MARKET ECONOMY
Authors: Pokotylov A. A.
Published: June 2023

The article investigates the economical and legal issues and main directions for formation of the new quality of CIS countries’ transport system in conditions of development of modern market economy.
IMPROVEMENT OF THE METHODS OF ALLOCATION OF OVERHEADS IN THE ACCOUNTING SYSTEM OF COSTS OF THE ENTERPRISE
Authors: Dziuba V. I.
Published: June 2023

A research has been proposed of permanent and variable portions of the factory costs in a transport enterprise, at their distribution in the general structure of expenditures.
THE EFFECT OF ASYMMETRIC FREIGHT TRAFFIC ON THE SELECTION OF OPTIMAL LOCOMOTIVE TRACTION ON LITHUANIAN RAILROAD
Authors: Vaičiūnas G. , Lingaitis L. P.
Published: June 2023

The paper deals with the effect of asymmetric character of the Lithuanian railroad freight traffic in western and eastern directions on the selection of optimal locomotive traction. On the basis of analysis of data on freight turnover in 1999, it has been concluded that the rational solution is such an allocation of the locomotive power, which would give to the west-bound direction 2.7 times higher power than to the east-bound one.
COMPUTER SIMULATION OF RIDE DYNAMICS AND WEAR OF THE WHEELS OF THE FREIGHT LOCOMOTIVE WITH RADIAL INSTALLATION OF THE WHEEL PAIRS
Authors: Mikhalchenko H. S. , Yazykov V. M. , Kossov V. S. , Spirov O. V.
Published: June 2023

Results of detailed simulation of motion of the freight locomotive equipped with original three axle bogies with the radial steering mechanism designed by VNIKTI are given. The simulation was performed with the help of the program UM Loco developed at BSTU. To solve the wheel-rail contact problem an approximate model which does not lead to stiff equations of motion and can be used for non-elliptical contact areas was used.
THE FACTOR OF WEAR OF THE RIDGES AT SPINNING WHEEL SETS IN A CURVE
Authors: Afanasov A. M.
Published: June 2023

The paper suggests a technique of estimation of wheel flange wear in locomotive whealset skidding in negotiations of curves.
SYSTEM OF AUTOMATIC CONTROL OF THE BRAKING FORCE WHEN THE REGENERATIVE ELECTRIC LOCOMOTIVES OF A DIRECT CURRENT EXECUTED ON MODERN ELEMENT BASE
Authors: Ustymenko D. V.
Published: June 2023

The authors suggest a system of automatic control of braking force at recuperation ofd.c.electric  locomotives, in which the necessary braking effort is generated by the decisive unit, constructed on the basis of a microcontroller, according to the pre-set law, which provides an increase of the volume of recuperative energy in comparison with existing variants. The calculation of transitional processes for the most typical cases of system operation has been provided.
PROBABILISTIC EVALUATION OF THE INFLUENCE OF LUBRICANTS ON THE WEAR OF THE WHEELSETS
Authors: Miliukas Sh. , Linhaitis L. P. , Podvezko V.
Published: June 2023

The article represents the research results of probabilistic evaluation of the effect of lubricators upon the wearout of wheelsets. The authors show dependence of the intensity of flange tear-out on the running distance. Received regression curves have been provided, allowing to forecast intensity of the flange tear-out. The studies have shown that flange lubrication system allows to enlarge running resource of the whealset by no less than 31% before facing is required.
STUDY OF THE INFLUENCE OF ROAD ALIGNMENT PARAMETERS AND TYPE OF THE ROLLING STOCK AT MAXIMUM SPEED
Authors: Kharlan V. I.
Published: June 2023

The article investigates the influence of plane, the longitudinal profile parameters and the kind of rolling stock on the level of maximal speed in introduction of high speed train services.
ABOUT THE HIGH-SPEED NETWORKS ON UKRAINE'S RAILWAYS
Authors: Kirpa H. M. , Bosov A. A. , Korzhenevych I. P.
Published: June 2023

The article considers a mathematical model of high-speed rail network of inUkraineand proposes a method of developing the rational options.
RESIDUAL LIFE ASSESSMENT AND LIFE EXTENSION OF SUBWAY CARS
Authors: Trietiakov A. V. , Borisov S. V.
Published: June 2023

The paper reports the main results of work carried out to prolong service life of underground cars: analysis of failures found in the process of technical diagnostics of car body shells and frames and development of the design to eliminate the failures.
EVALUATION OF THE INFLUENCE OF THE INCLINATION ANGLE OF TRACTION ON A VERTICAL LOADING OF THE WHEELSETS OF TWO-AXLE TRUCKS OF THE LOCOMOTIVE IN THE IMPLEMENTATION OF TRACTION
Authors: Bondariev O. M. , Ryzhova T. O. , Bondariev O. O.
Published: June 2023

The paper provides the outcomes of theoretical calculations of vertical loading of wheelsets of two-axle locomotive bogies with the locomotive running on a stationary mode with a freight train. Evaluation is given to the influence of the slope angle of the inclined roller on the difference of loadings onto the bogie wheelsets.
REPRODUCTION OF REAL VIBRATION OF THE ELEMENTS AND THE EQUIPMENT OF ROLLING STOCK
Authors: Horobets V. L.
Published: June 2023

The article considers the methods of reproduction of vibrations, perceived by bearing structures of the rolling stock, in the course of stationary vibration tests.
MATHEMATICAL FORM MODEL OF WORN PARTS OF THE SYSTEM MATE "THE NECK AXIS OF THE WHEELSET – THE INNER RING OF THE BEARING"
Authors: Kostin M. O. , Mykhalichenko P. Ye.
Published: June 2023

The article describes a mathematical model and the results of the probabilistic experimental and theoretical research of the degree of wear of the inside surface of bearing rings and wheelset neck of the VL series electric locomotives. A new technology of system tightness restoration has been proposed by means of electrolytic precipitation of zinc by impulse/reverse currents. The parameters of the current and the result of preliminary laboratory strength tests of the pressed connections have been provided.
DIAGNOSTICS OF POINTS DRIVE WITH PLC CONTROLLER APPLICATION
Authors: Mikulski Jerzy , Młyńczak Jakub
Published: June 2023

In work the researches of current characteristics of points drive have been executed. As a result of analysis these characteristics a concept of remote diagnostics of points drive has been offered, a model of diagnostic equipment for measurement of setting current value has been offered also.
THE USE OF ROLLING STOCK WITH SLIDING WHEEL PAIRS ON THE DIRECTION KYIV–LVIV–MOSTYSKA II
Authors: Pikh B. P. , Korzhenevych I. P. , Kurhan M. B.
Published: June 2023

The article provides the analysis of track and the results of dynamic tests of cars with extensible wheelsets on the railway direction Kyiv–Lviv.
THE INFLUENCE OF GEOMETRICAL PARAMETERS OF RAILWAY TRACK IN CURVES SIDE WEAR ON OUTER RAIL
Authors: Povilaitene I. , Sakalauskas K. , Podahelis I.
Published: June 2023

The article provides data on the influence of railway track geometric parameters in curves on lateral wear of the external rail and proposes a method of calculating the additional costs of maintenance and reconstruction of small and medium radius curves.
THE SOLUTION OF ENERGY AND RESOURCE SAVING QUESTION THROUGH THE ORGANIZATION OF PRODUCTION AND TECHNOLOGY OF HEAT-INSULATING MATERIAL
Authors: Pshinko А. M. , Savytskyi M. V. , Koretska S. O. , Honcharenko O. O.
Published: June 2023

This article describes a conceptual approach to the organization of production and the manufacturing technology of thermo-insulating material «Heatisol», provides the basic data on the material and considers its advantages in comparison with conventional materials currently in application.
THE PROBLEM OF OBTAINING CONCRETES WITH HIGH OPERATION PROPERTIES
Authors: Pshinko O. M. , Krasniuk A. V. , Punahin V. M.
Published: June 2023

The work provides analysis of the problems, connected with obtaining high-strength concretes for ring-like and tubular non-armatured constructions and shows a possibility of obtaining a material, capable of enduring significant pull tensions in applications of a complex of technological actions. This will allow realizing the developed technology in manufacture of ringular and tubular structures for non-head and small-head water courses.
TO THE QUESTION OF THE STABILITY AGAINST THE WHEEL ROLLING THE RAIL FOR EMPTY FREIGHT CARS
Authors: Danovych V. D. , Rybkin V. V. , Redemeistr O. H. , Khalipova N. V. , Triakin A. P.
Published: June 2023

The paper considers the issues of determining the rates of stability against a wheel flange climb onto the railhead for various models of empty four-axle freight cars with bogie series 18-100. The influence of the car parameters on the period of probable wheel flange climb in running on straight track sections and in negotiating small and medium-radius curves has been investigated.
ULTRASONIC NON-DESTRUCTIVE CONTROL OF STRUCTURE FORMATION IN DISPERSE SOILS
Authors: Hryshechkin S. A. , Diadiushkin D. I.
Published: June 2023

The results of the experiments on ultrasonic monitoring of structure-forming processes in clayey grounds are considered in the paper. An effect of structure-forming processes on propagation velocity of longitudinal waves has been demonstrated. The approximating equations, taking into account the time-dependence of the velocity, have been derived. It has been revealed that the structure-forming processes run most actively at certain density values of the soil skeleton. An explanation to this fact has been suggested from the standpoint of the theory of ion-electrostatic interaction between dispersed particles.
CONSIDERING THE FLUID MECHANICS OF THE DAMPERS WITH THE DAMPING BRIDGE SPANS
Authors: Marochka V. V.
Published: June 2023

There are many methods of damping the oscillations in bridge girders with the use of hydraulic dampers. The offered paper is devoted to more careful calculation of the dampers themselves, in particular – their basic working characteristics. Recommendations have been given concerning optimization of operational characteristics of the dampers.
PROBLEMS OF PERFECTION THE ORGANIZATIONAL AND TECHNOLOGICAL PREPARATION TO THE CONSTRUCTION OF OBJECTS OF TRANSPORT CONSTRUCTION
Authors: Chashyn D. Yu.
Published: June 2023

The aim of the work is improvement of methodical principles of organizational and technological preparation to construction of the transport object. In order to reach this goal, solutions of the set tasks are presented on the basis of modern achievements of the system approach in construction management. The essentials of practical realization of such decisions in designing and construction have been outlined.
OPTIMIZATION OF STRUCTURAL ELEMENTS OF THREE PART STATIONS TAKING INTO ACCOUNT THE SPECIFICS OF THEIR BEHAVIOR
Authors: Tiutkin O. L. , Petrenko I. M.
Published: June 2023

The article provides the analysis of optimization concept of constructive elements in three-vaulted deep contour underground stations. Statement of the optimization task has been performed; its solution and algorithm of its realization have been presented.
THE MULTI-CHANNEL DIGITAL DIAGNOSTIC METHOD OF RELAY
Authors: Razghonov O. P. , Adreievskyi O. V. , Bondarenko B. M. , Bezrukavyi D. O. , Zhuravlev O. Yu.
Published: June 2023

The multichannel digital method diagnostics of relay consists in the use of experimentally findings, for the calculation of parameters of examinee relay. During registration of dynamic descriptions parallel on all channels, analog-to-digital treatment of results is produced, by the method of comparison with the admittances stopped up in memory of computer and is drawn conclusion about the good condition of device.
THE CALCULATION OF THE DISTRIBUTION OF POLLUTANTS IN BUILT-UP AREAS
Authors: Biliaiev M. M. , Gunko Ye. Yu.
Published: June 2023

The 3D numerical model to simulate the toxic gas dispersion on industrial sites 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 of atmosphere pollution and toxic hazard are presented.
JUSTIFICATION OF THE CHOICE OF AIR CONDITIONING SYSTEM FOR LOCOMOTIVES CAB
Authors: Khrystian Ye. V. , Tytarenko I. V.
Published: June 2023

The existing systems of an air conditioning by mobile machines are considered, the analysis of the strengths and weaknesses is performed. The improved conditioning system for a locomotive cabin is proposed on the basis of regenerative indirect evaporation cooling.
SINGLE OUTPUT RAIL IS AN IMPORTANT FACTOR FOR PREDICTING THE PERIOD OF THE REPAIR PATHS
Authors: Rybkin V. V. , Umanov M. I. , Bal O. M.
Published: June 2023

The results of statistical researches of rails’ single output prognostication are adduced; the method of their determination is improved with consideration of operating factors: track curvatures, middle axial loading of rolling stock, load stress of line and other.
PROBABILISTIC CHARACTERISTICS OF THE SECTIONS OF THE ROLLING STOCK CUTS ON THE ARROWS
Authors: Bobrovskiy V. I. , Kudriashchov O. V. , Chibisov Yu. V.
Published: June 2023

The method of calculation of probabilities of discontiguous cuts’ divisions on the switch points is developed. The researches as for connection these probabilities with the parameters of the trains are executed. The researches also tackle the problem of the connection between the above mentioned probabilities and the construction of the hump neck.
THE EFFICIENCY OF PASSENGER TRANSPORTATION IN SUBURBAN
Authors: Dronova T. I.
Published: June 2023

For the increase of efficiency of prymyskyy passenger transportations the improvement of calculations is offered for transportations and measures on the costs cutting of operations.
TRANSIT POTENTIAL OF UKRAINE IN MODERN CONDITIONS OF INTERNATIONAL INTEGRATION
Authors: Kukharchyk V. H.
Published: June 2023

The traffics of goods, which pass through ports of Ukraine, are analysed in the article. The ways of development of the effective use of transit potential of Ukraine are offered in the modern terms of international integration.
RESERVES FOR INCREASING THE EFFICIENCY OF MANAGING SUBJECTS OF MARKET RELATIONS
Authors: Muha Yu. O. , Yakovenko V. V.
Published: June 2023

The modern market relationship are being developed in Ukraine. It is necessary to employ the modern technologies in production and sails to enter competitive world markets successfully. There are two major ways to speed up turnover of investment: to shorten supply chain and to optimize production stock.
ALTERNATIVE SOURCES OF INVESTMENT FINANCING ENTERPRISES OF UKRAINE
Authors: Petyk M. I.
Published: June 2023

In the article is considered the mechanism of financing of update of basic facilities by leasing, certainly decision-making stages about the leasing financing and method of determination of value of the leasing contracts.
METHODICAL PROVISION OF CRISIS DIAGNOSIS OF DOMESTIC ENTERPRISES
Authors: Rudyk O. R.
Published: June 2023

The article is devoted to classification of methods of diagnostics in the process of anti-crisis management by enterprises. Kinds and basic stages of diagnostics and monitoring of the financial state of enterprise are considered.
FINANCIAL SECURITY IN THE AVIATION INSURANCE MARKET
Authors: Solovei N. V.
Published: June 2023

Determination of factors of authenticity of inability of insurer or perestrakhovyka is analysed to recover claims or losses. The main aspects of natural financial ability of insurer and perestrakhovyka are considered to pay in the case of losses.
THE MITIGATION STEERING BIAS CURVES FOR INDUSTRIAL TRANSPORT
Authors: Korzhenevych I. P. , Gots O. V.
Published: June 2023

Influencing of decline of coefficient of rolling friction is examined in curves on the size of softening of leadingslope.
THE RATIONAL STREAMS DEFINITION ON THE GRAPH
Authors: Bosov A. A. , Kodola H. M.
Published: June 2023

As mathematical model the definition of rational streams on the column the problem of vector optimization on columns has been considered. The example of its decision is considered.
STUDY OF PHYSICO AND MECHANICAL PROPERTIES OF SOLUTIONS FOR CONCRETING UNDER THE WATER
Authors: Klochko B. H. , Krasniuk A. V. , Momot V. O.
Published: June 2023

In the article are brought studies a physicist-mechanical characteristics an dissolves for concreting under water. On results of studies movable and toughness features is designed optimum compositions for filling under pressure at the concrete transport erecting repair under water.
ANALYSIS OF MATERIALS FOR RESTORATION OF BUILDINGS AND STRUCTURES ON THE RAILWAY TRANSPORT
Authors: Pshinko O. M. , Krasniuk O. V. , Palii V. V.
Published: June 2023

In the article is brought analysis of condition of buildings and erecting, which are used on the rail-freight traffic in theUkraine. Described main known dissolves, which are to be use for the transport building repair and buildings. Shown advantages of using as repair material polymer-cement and cement –polymer dissolves.
THE STUDY OF THE PROPERTIES OF THE REPAIR OF STRUCTURES ON THE BASIS OF ALKYLRESORCINOL
Authors: Pshinko O. M. , Krasniuk O. V. , Ulchenko T. V.
Published: June 2023

The properties of the mortars for repairing transport constructions operated upon subsoil water effect are given in the article. Advisability of using polymeric alkali binding materials as impervious barrier is proved. Experimental results confirming positive properties of durability of investigated materials are presented.
DESIGN FEATURES AND OPERATING CHARACTERISTICS OF VOLTAGE REGULATORS OF DC DOMESTIC ELECTRIC ROLLING STOCK
Authors: Biluhin D. S.
Published: June 2023

The article describes main types of d.c. generators of controlling circuits of electric rolling stock, provides analysis of voltage regulators and substantiates the need of improvement of voltage generators used in d.c. electric rolling stock.
DETERMINATION OF THE PERCENT REMOVAL OF METAL UNDERGROUND PARTS OF THE REINFORCED CONCRETE
Authors: Poliakh O. M.
Published: June 2023

Research of carrying out of metal on the frequency of own fluctuations of ferro-concrete supports of the catenary. Dependencies, charts and nomograms have been received.
THE ALGORITHM OF OPERATION PERFORMING OF DIVIDING THE NUMBER BY TWO IN THE SYSTEM OF RESIDUAL CLASSES
Authors: Poliskyi Yu. D.
Published: June 2023

The method of solving problem of division on two for numbers in residue class system are observed. The method is algorithmically simple and not complicated to scheme realization for making of effective computing's structures.
COSTING AND TARIFFS ON COMMUTER RAIL OF PASSENGER TRANSPORTATION
Authors: Balaka Ye. I. , Sementseva O. V. , Vasyliev O. L.
Published: June 2023

Untraditional for railway transport approach to calculation of suburban passenger transportations prime cost, tar­iff definition and on its basis the cost of transportations on different distance in trains that differ by account of passenger and sections are proposed.
THE SELECTION OF THE GEAR RATIO BRAKE LINKAGE OF PASSENGER AND FREIGHT CARS MAXIMUM ALLOWABLE FRICTION WHEEL RAIL
Authors: Vodianikov Yu. Ya. , Kukin S. V. , Zhykhartsev K. L.
Published: June 2023

The authors have constructed nomographs of dependence of the gear ratio of a lever-type braking gear on the tare of passenger and freight cars according to the calculated limit coefficient of wheel/rail clutch. It has been shown that for passenger cars with the tare of 53 to 57 ton-force, at a gear ratio 5.3, the 15% skidding reserve in the speed range of 90 to 160 km/h is not maintained. For freight cars with the tare up to 22 ton-force, at a gear ratio 5.72, the basic condition of absence of skidding is not maintained either.
THE DEVELOPMENT PROSPECTS OF UKRAINIAN MARKET OF TRANSPORT SERVICES
Authors: Lukhanin N. I. , Muzykina H. I. , Beh P. V.
Published: June 2023

The article gives a brief analysis to the state of transport services market in Ukraine and proposes measures of its improvement.
ASSESSMENT OF RESIDUAL RESOURCE OF CAST PARTS FREIGHT CAR TRUCKS ON THE RESULTS OF TESTS OF SAMPLES OF ENDURANCE
Authors: Senko V. I. , Pastukhov I. F. , Pastukhov M. I.
Published: June 2023

The article desribes the existing and new methods of assessing residual resource of cast parts of the freight car bogies. The existing method is based on obtaining fatigue characteristics of the parts by way of performing field tests for endurance. It has been shown that these tests are extremely labor-consuming, require considerable costs and special equipment. The new method of assessing residual resource of cast details is based not on the fatigue test performed on the actually operated parts, but on testing of the samples, which are made of the parts that have already exceeded their service term (30 years). The testing of the samples is performed under symmetrical cycle of loading, under the cantilevered bend with rotation. The fatigue characteristics of material of the parts, after they have passed their service term, and the range of operational dynamic loadings in the part are the basis for their residual resource assessment. The experiment has shown that expenses for fatigue test of the parts are 5 times less than those for the parts testing on location. The method, derived from the results of samples testing, has passed all-round approbation. The difference in results of the residual resource assessment of bogie sideframes and bolsters of the freight cars in the parts testing on location and the samples testing does not exceed 6%.
THE DISTRIBUTION OF HARMONICS TRACTION CURRENT ALONG THE LENGTH OF THE FEEDER ZONE AND THEIR IMPACT ON THE OPERATION OF TRACK CIRCUITS
Authors: Serdiuk T. M.
Published: June 2023

The article considers issues of electromagnetic compatibility of traction network with the rail circuits. A mathematic model is elaborated for evaluation of distribution of harmonics of traction current on the length of feeder zone and determination of the value of stray currents. The results of modeling are represented for 50 and 100 Hz harmonics of return traction current.
MODELING OF SHOCK INTERACTION BETWEEN WHEEL AND RAIL
Authors: Prykhodko V. I.
Published: June 2023

Description of the mathematical model of wheel/rail impact interaction has been given in this paper. In this, the impact action can be regarded both as elastic and viscous.
STUDIES OF DAMAGE TO THE WHEELSET FREIGHT CARS IN OPERATION IMPACT OF BRAKE SYSTEM
Authors: Vodianikov Yu. Ya. , Kukin S. V. , Nishchenko O. Ye.
Published: June 2023

Results of research of damageability of surface of wheelsets in operation, caused by the impact of brake shoes in braking are provided. Statistical characteristics of damage occurrence depending on the term of service have been received.