bluuebunny/crossref_metadata_2025_split huggingface dataset:
Use of convolutional neural networks for segmenting images of roads from satellite
Authors: Seliverstov Ya A , Seliverstov S A , Naryshkin R S , Kripak M N 
Published: December 2020

Abstract
The article developed a technique for using convolutional neural networks for automatic segmentation of roads in images obtained from satellites with a synthesized aperture. The analysis of the subject area and the relevance of this study. The development of a neural network based on U-net was carried out in Python 3x using the libraries TensorFlow, TensorBoard, Pandas, Numpy, Scipy, Matplotlib, Sklearn. The neural network was trained on a training sample of 1200 images prepared by hand marking. The accuracy of the developed model when testing on prepared samples was 68%. According to the results of the study, conclusions were drawn and prospects for further functional development of the developed tools were determined.
Mathematical processing of experimental data of the agricultural working body
Authors: Belousov Sergey V , Belousova Anna I 
Published: December 2020

Abstract
The work is devoted to experimental researches, namely, obtaining a comparative assessment of the quality parameters of the technological process of layer-by-layer soil treatment, in comparison with the serial and proposed working bodies. The article has an analytical character, which is expressed in the fact that the analysis of experimental and energy parameters of an arable unit with various working bodies is given. The quality of the technological process of layer-by-layer tillage with additional working bodies was determined. The conclusions outline the main results achieved so far.
Increasing the mobility of tracked vehicles during curvilineer motion with partial skidding
Authors: Vyaznikov M V , Vyaznikov A M 
Published: December 2020

AbstractA method for determining the forces and moment of resistance for curvilinear motion of a tracked vehicle on deformable soil is presented. It is assumed that in the patch of contact with the ground, the track performs both rotational and translational motion. Under these conditions, the real law of friction has a fundamental difference from the classical Coulomb’s law. To describe this process, a friction model based on the first-order Pade expansion is proposed, generalized to a flat rectangular contact pattern of the tracked mover with the ground. The determining factor in this process is sliding of the tracked mover relative to the ground. It limits the realizable traction force and the boundary conditions for the adhesion of the tracks to the ground in the contact pattern. The interpretation of these physical processes occurring in the contact pattern, based on the theory of combined friction, makes it possible to use this mathematical model in the structure of the algorithm of an automatic motion control system to solve the problem of controllability in case of partial side skid, which will further increase mobility and maneuverability of tracked vehicles.
Technological support for the durability of the balancing suspension of the car
Authors: Rodichev A Yu , Novikov A N , Gorin A V , Tokmakov N V 
Published: December 2020

Abstract
The article presents an analysis of vehicle suspension failures. One of the main malfunctions is the wear of the rear axle balancer. Dimensional chains are shown that describe the working clearance in a sliding bearing for various types of repairs. Describes how to repair the balancer of the car suspension. The dependence of the wear of sliding bearings on the gap in the pair “sliding bearing - the axis of the balancer” is obtained. A promising method is proposed for reducing the working clearance in the sliding bearing of the balancer of the automobile suspension by applying film antifriction coatings.
Local adaptive road control crossroads
Authors: Kashtalinsky A S , Parsaev E V , Teterina I A 
Published: December 2020

Abstract
Exploring the properties of traffic flow, collecting and processing statistics on the marker indicators and criteria that characterize these properties is an important task on the road to the implementation of adaptive and intelligent traffic management systems in cities. The article provides an overview of the methods and indicators that allow forming a theoretical basis on the patterns of movement of transport on sections of the street and road network. This base is the source of the initial information for the introduction of adaptive control systems at isolated crossroads in urban environments.
Theoretical model of non-linear tire slip
Authors: Abdulgazis A U , Podrigalo M A , Abdulgazis U A 
Published: December 2020

Abstract
The authors carry out the analysis of research studying the phenomenon of slipping of a wheel with a pneumatic tire. It is established that the increase in the slip angle results in the slip coefficient decrease. The values of the slip coefficient for three types of tires are determined experimentally. The previously proposed analytical expression, which makes it possible to quite accurately formulate the nonlinear relationship of the slip angle with the lateral force acting on the elastic wheel, is clarified.
A new approach to assessment of vehicular traction dynamics
Authors: Abdulgazis Aziz , Podrigalo Mikhail 
Published: December 2020

Abstract
The work shows the inaccuracy of the statement that the traction moment on the traction wheel is an internal force and the tangential reaction on this wheel is an external force. The author proves that the rolling resistance moment of the vehicle wheels is an internal force, and the losses caused by this moment should be covered by the transmission efficiency factor. The paper revises the equation for traction dynamics of the translational motion of a vehicle, which can be used in the analysis of its traction-speed properties.
The Air Suspension Synthesis for the Single-axle Transport and Technological Module
Authors: Vetrogon A A , Ostrenko A G , Kharchenko A A , Soustova L I 
Published: December 2020

Abstract
The present paper contains a theoretical justification of composition (assembly of elements or structure) and design of an air suspension of a single-axle transport and technological module. Application of mathematical simulation proves the feasibility of using an independent suspension with air bellows, but without any antivibration devices (shock absorbers). The feasibility concerns the transport and technological module of the proposed design.
The dynamics and strength of the carrying structure of a flat wagon while conducting fire from it
Authors: Fomin O , Lovska A , Kichuk Ya , Urum N 
Published: December 2020

Abstract
The dynamic loading of the flat wagon supporting structure during the military equipment transportation and conducting fire from it is investigated. A flat wagon model 13-401 by the construction of Dniprodzerzhirsk Car Building Plant (Ukraine) was chosen as a prototype. It was taken into account that the flat wagon was loaded with two anti-aircraft systems of muzzle energy of 89 kJ. The accelerations acting on the supporting structure of the flat wagon are determined using mathematical simulation. At the same time, it was taken into account that a simultaneous shot from two anti-aircraft systems is carried out. The solution of the mathematical model was carried out in the MathCad software. It has been found that the longitudinal accelerations of the flat wagon supporting structure were about 36 m/s2, and the vertical ones were about 5 m/s2. The obtained accelerations were taken into account when determining the equilibrium stability of the flat wagon, considering the conducting fire. The stability factor in this case was about 9. The calculation results of the strength of the flat wagon supporting structure are presented. The calculation was carried out in a quasi-static state. It has been established that the maximum equivalent stresses occur in the areas of frontal stops of the automatic coupling and amount to about 300 MPa. The results of the research will contribute to the creation of innovative flat wagon load-bearing structures for the military equipment transportation with the possibility of firing while moving.
Ways to improve the mathematical model of a freight car for the execution of forensic railway-transport expertises
Authors: Batig A , Kuzyshyn A , Sobolevska J , Milyanych A , Hrytsyshyn P 
Published: December 2020

Abstract
According to statistics, receipts of forensic railway-transport expertises related to the derailment of freight wagons annually grows. At the same time, an analysis of the available mathematical models of freight wagons for the study of such cases showed that at present they are not sufficiently detailed to the extent that it is necessary to analyze the causes of rolling stock derailment. Therefore, taking into account the main reasons that occurrence of such railway accidents over the last five years on the railways of Ukraine, the article selects the main directions for improving the mathematical model of a freight wagon. These directions, in turn, should cover the whole plural of factors (explicit and hidden) and identify the most significant ones regarding the circumstances of the derailment rolling stock off the track, established on the basis of a computer experiment. An algorithm and a mathematical model are proposed taken into account the influence on the dynamics of the wagon of process of closing gaps in the axle-boxes and slides, and the equations of motion of the wheelset are supplemented by a guiding force, whose value is one of the main indicators of the stability of the rolling stock.
Mathematical model of a motor-grader movement in the process of performing working operations
Authors: Shevchenko V , Chaplyhina O , Pimonov I , Reznikov O , Ponikarovska S 
Published: December 2020

Abstract
The design features of a motor-grader help it perform a wide range of working operations, which puts it on a par with the main machines in the construction industry. Unlike other earth-moving machines, the motor-grader can perform work operations not only in a cyclic mode, but also in a continuous action mode. Considering these features, not only productivity should be addressed as the main indicator of the efficiency of this machine, but also the indicators of the quality of the working operations performed, in particular, the indicators of road-holding ability in the process of performing continuous working operations. The work has substantiated and developed a mathematical model of the motor-grader movement during working operations. This model makes it possible to predict the expected trajectory of the motor-grader on the basis of deterministic dependencies, which enables to assess the indicators of road-holding ability. The difference between the proposed model and the existing ones is the consideration of a two-stage mode of machine movement: plane motion at the first stage and rotational around the stop point at the second. When describing the external forces acting on the motor-grader, the differences in the formation of resistance forces on the blade during various working operations are taken into account.
Contemporary principles for solving the problem in noise reduction from railway rolling stock
Authors: Zelenko Yu , Zelenko D , Neduzha L 
Published: December 2020

AbstractThe statistical and monitoring data confirm the significant impact of the operational mode on the most important noise and vibration parameters, which is relevant for ensuring the efficiency and quality of the operational process with regard to ergonomic and environmental requirements. The article analyzes the acoustic parameters of rolling stock of the railway, emphasizes the peculiarities of noise emission from various elements of rolling stock and a track. Existing approaches towards solving the problem in the organization of railway noise control are outlined. On the basis of existing modern methods for measurement and analysis of acoustic parameters, the authors propose conceptual approaches toward monitoring the acoustic parameters, predicting noise characteristics and constructing the noise maps of railways. The algorithm of the developed acoustic model for the operational monitoring of noise load and the possibility to compile a case of noise maps for Ukrzaliznytsia is presented. The proposed algorithm allows at given basic design parameters and speed of rolling stock, known sound-absorbing and dissipative characteristics of all elements to carry out a rational selection of noise-protective measures in accordance with the sanitary noise regulations for a specific receptive facility.
Research of the mechanism of particles bonding with substrate during thermal spraying of coating
Authors: Khrlamov Yu O , Sokolov V I , Krol O S , Romanchenko O V 
Published: December 2020

Abstract
The problems of modelling of bonding of particles with a part surface during thermal spraying of coatings are considered. The formation of adhesive and cohesive strength of thermal coatings is considered from the standpoint of the theory of welding of materials in solid phase. The formation of interatomic connections between particle materials and parts is accompanied by deformation processes in contact zone, which facilitate the unloading and rupture of connections in the metal – oxygen system, loading and connections between atoms of interacting materials. The kinetics of formation of interatomic connections between materials of particle and substrate at high collision velocities is satisfactorily described by a modified semi – empirical equation that uses experimentally measured quantities: the magnitude of tensile deformation of interatomic connection, the Young’s modulus, the coefficient of thermal linear expansion. Possible influence of nanotopography of substrate surface on the interaction with sprayed particles and formation of coatings with high adhesive and cohesive strength is shown.
Onset of detonation through a cold flow analysis using metallic diaphragms – an experimental approach
Authors: Srikrishnan S , Shaafi T , Dash P K 
Published: December 2020

Abstract
Modern era is looking for high speed transportation systems across globe with due comfort. Innovative design in both aerodynamic and propulsion studies have been made for achieving supersonic to hypersonic speeds ranging a claim of 1km/s under stratosphere limit. The complexity in designing such vehicles in a high-altitude test facility is borne due to the fact that simulation of such conditions as low density, no shock conditions, high rate of dissipation and shock flow comes from unavailability of sufficient technology to pressurize gases to the optimal testing conditions. The prominent ways of constructing a shock tube either involve a blow down type or a vacuum suction type. Here a blow down type shock tube require a built-up pressure comparable to the velocity at the test section. Fibre diaphragms blow out at less critical pressure and are unsuitable for high speed flows. Metal foil are incepted as a concept of diaphragms for this particular problem. Aluminium foils are stacked across a mounting flange on a settling chamber to determine the maximum pressure at which blow down occurs. The results are tabulated for an incremental pressure schema of 1 bar to 10 bar with which it was found that the wave pressure development occurs during each batch of aluminium and recorded to be between 3.5 bar and 9 bar the successive velocities at the exit was found to be increasing with increase of blast pressure.
Implementation of design for manufacturing in hot forging
Authors: Ruban P. , Jayaprakash J. 
Published: December 2020

Abstract
The manufacturing of components in Hot forging method is seen in detail. The concept of Design for Manufacturing in Product design and development is discussed. The Role of Design for Manufacturing will be implemented in this project for the reduction of cost of production, Reduce the wastage during production and also to increase the production rate. Here in this project the Six Case study will be taken for the design of manufacturing in Hot Forging. The cost evaluation in the hot forging process is evaluated.
The effect of structural factors on tribological behaviour of copper-zinc gas-dynamic coatings
Authors: Arkhipov V E , Moskvitin G V , Pugachev M S 
Published: December 2020

Abstract
The paper studies the effect of the structure of copper and brass coatings, obtained by gas-dynamic spattering, on their tribological behaviour. Using durometrical, chemical and X-ray analyses, as well as the wear tests, the authors have determined that the copper coating structure hardness is 102.7 HV, it has pores up to 2 urn in diameter, brass coating consists of 106.5 HV copper, 49.7 HV zinc and 168.7 HV non-metallic compositions (y - and e - phases), distributed by mass as 62:7.9:24.2 % correspondingly. The both coatings have presented good results in sliding friction couple tests.
Application of titanium nitride and titanium alumonitride as intermediate layer for diamond-like coatings of steel parts
Authors: Buyanovskii I A , Samusenko V D , Levchenko V A 
Published: December 2020

Abstract
The physicomechanical and tribological characteristics of DLC coatings was investigated, with using TiN and AlTiN hard coatings as intermediate layers. The tests were carried out both with dry friction and in the environment of PAO-4. It was found that intermediate coatings provide good adhesion of the DLC to steel; the best result was obtained with the AlTiN coating. The main factor determining antifriction properties in the friction pair “steel - coating” with boundary lubrication is tribological properties of coatings.
The use of boehmite in tribology
Authors: Fedotov A V , Gvozdev A V , Dunaev A V , Pekhalsky I A 
Published: December 2020

Abstract
The analysis of the results of the use of nanostructure boehmite as a break-in and prophylactic tribological preparations is carried out. The mechanism of boehmite action during the running-in of a diesel engine and a drilling rig gearbox is considered. A boehmite-based product reduces break-in time, reduces the friction coefficient and wear of tribological couplings. A scheme of the effect of boehmite on increasing the life of tribological compounds is developed. Justified its use as a repair and recovery tribological product.
Keeping Work and Family Separate: A Serial Mediation Analysis of Social Workers’ Work–Family Segmentation, Work–Family Enrichment and Job Performance in Australia
Authors: Kalliath Parveen , Chan Xi Wen , Kalliath Thomas 
Published: December 2020

AbstractWith increased blurring of boundaries between work and family lives, work–family segmentation has been suggested as an effective work–life strategy for social workers who are involved in complex human service work, to reduce work–family conflict and enhance work–family enrichment. Yet, numerous studies have examined social workers’ work–family conflict experiences, and only a few have focussed on social workers’ work–family enrichment experiences. Correspondingly, drawing on boundary theory, conservation of resources theory and work–family enrichment theory, we investigated how family-to-work enrichment and work-to-family enrichment help social workers to benefit from work–family segmentation to increase their job performance. Using an online survey of Australian social workers (n = 504), we tested the impact of work–family segmentation on the job performance of social workers through family-to-work-enrichment and work-to-family enrichment. The study found evidence for the positive impact of work–family segmentation in helping social workers to experience family-to-work enrichment and work-to-family enrichment, thereby enhancing their job performance. The theoretical and practical implications of the findings for social workers, supervisors and the social service agencies are discussed.
Heterozygous deletion ofSox9in mouse mimics the gonadal sex reversal phenotype associated with campomelic dysplasia in humans
Authors: Bagheri-Fam Stefan , Combes Alexander N , Ling Cheuk K , Wilhelm Dagmar 
Published: December 2020

AbstractHeterozygous mutations in the human SOX9 gene cause the skeletal malformation syndrome campomelic dysplasia which in 75% of 46, XY individuals is associated with male-to-female sex reversal. Although studies in homozygous Sox9 knockout mouse models confirmed that SOX9 is critical for testis development, mice heterozygous for the Sox9-null allele were reported to develop normal testes. This led to the belief that the SOX9 dosage requirement for testis differentiation is different between humans, which often require both alleles, and mice, in which one allele is sufficient. However, in prior studies, gonadal phenotypes in heterozygous Sox9 XY mice were assessed only by either gross morphology, histological staining or analyzed on a mixed genetic background. In this study, we conditionally inactivated Sox9 in somatic cells of developing gonads using the Nr5a1-Cre mouse line on a pure C57BL/6 genetic background. Section and whole-mount immunofluorescence for testicular and ovarian markers showed that XY Sox9 heterozygous gonads developed as ovotestes. Quantitative droplet digital PCR confirmed a 50% reduction of Sox9 mRNA as well as partial sex reversal shown by an upregulation of ovarian genes. Our data show that haploinsufficiency of Sox9 can perturb testis development in mice, suggesting that mice may provide a more accurate model of human disorders/differences of sex development than previously thought.
Space–time discretization for nonlinear parabolic systems withp-structure
Authors: Berselli Luigi C , Růžička Michael 
Published: December 2020

AbstractIn this paper we consider nonlinear parabolic systems with elliptic part, depending only on the symmetric gradient, which can be also degenerate. We prove optimal error estimates for solutions with natural regularity. The main novelty, with respect to previous results, is that we obtain the estimates directly without introducing intermediate semidiscrete problems, which enables the treatment of homogeneous Dirichlet boundary conditions. In addition, we prove the existence of solutions of the continuous problem with the requested regularity, if the data of the problem are smooth enough.
Schumpeter Lecture 2019: Slow Household Deleveraging
Authors: Guerrieri Veronica , Lorenzoni Guido , Prato Marta 
Published: December 2020

AbstractWe use a model of precautionary savings with housing and mortgages to study the effects of a deleveraging shock on consumer spending. We focus on the deleveraging caused by a contraction in home values, and compute numerically the partial-equilibrium effect of the shock. Our simulations show that household deleveraging is associated with a long and protracted weakness in consumption. These effects appear even if we assume, realistically, that housing wealth is illiquid and mortgage debt is long term. We show that housing wealth matters for consumption decisions due to an insurance force: consumers know they can sell their house if they get hit by sufficiently negative shocks in the future. We also show that our slow deleveraging mechanism is amplified when incomes are affected by a weak aggregate consumption demand through general-equilibrium effects.