bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessment of elliptical defect dimensions influence on the metal structure contact strength properties
Authors: Stotsko Z A , Kuzin O A , Kopylov V I , Kuzin M O 
Published: March 2023

Abstract
Based on the approaches of continual mechanics and computer simulation, a computational methodology for establishing the operational parameters of functionally graded parts depending on the dimensional characteristics of elliptical defects is proposed. For the first time, using spatially non-local models of mechanics and the FEniCS finite element package, a calculation scheme was constructed for determining the contact strength of a material depending on the ratio of the sizes of the main radii of an elliptical defect in a structure. On the example of locomotive wheel tyres, it is shown that the most dangerous for operation are elliptical “needle-shaped” hubs with a ratio of the radii of the main axes of more than 40. They can also be a source for the development of “crack-type defects” during the operation of products. The established connection between the change in the properties of railway wheels under the action of loads and the characteristics of stress concentrators indicates that the shape of the concentrator is a more dangerous factor than its volume, and allows you to determine ways to control the operational parameters of parts with the presence of stress concentrators by surface engineering methods.
Study of characteristics of PWM signals in electromagnetic vibration drive control systems
Authors: Chubyk R V , Zelinskyi I D , Lub P M 
Published: March 2023

Abstract
The paper studies three forms of the pulse-width modulated (PWM) signal which is used to power the electromagnetic vibration drives of resonance-type vibrating machines. On the basis of a comparative analysis of the characteristics of PWM signals using the root mean square deviation for the time domain, the nonlinear harmonics (distortions) coefficient for the spectral domain, and the structure of the power part of the switches that form these signals, conclusions have been drawn on the feasibility of using different types of PWM in the control systems of electromagnetic vibratory drives.
Research of the characteristics of an air spring under cyclic load
Authors: Kuzyshyn A Y , Sobolevska Y H , Kostritsa S A , Voznyak O M 
Published: March 2023

Abstract
The dynamic stiffness, energy dissipation per cycle and the damping coefficient of the air spring of the second stage of spring suspension of high-speed rolling stock are investigated on the basis of a simplified mathematical model. The studies were carried out in the frequency range from 0 to 15 Hz. To determine the parameters of the air spring, its power characteristic was built, the area that characterizes the energy dissipation of the system per cycle. Based on the constructed characteristics, the damping coefficient and air spring stiffness during compression and expansion were determined. The influence of the frequency of the disturbing force and the diameter of the connecting element on the investigated parameters was studied. The obtained ratios of quantities would be made it possible to optimize the parameters of spring suspension of high-speed rolling stock from the point of view of ensuring admissible dynamic performance and traffic safety indicators.
Dynamics of mobile robot equipped with inertial vibration exciter and unidirectionally rotating wheels
Authors: Korendiy V M , Kachur O Y , Gurskyi V M 
Published: March 2023

Abstract
Vibration-driven locomotion principles are currently of significant interest among designers and researchers dealing with mobile robotics. Among a great variety of robots chasses, the wheeled ones are most commonly used. The major purpose of this study consists in defining the dynamic characteristics of the wheeled vibration-driven robot equipped with the centrifugal (inertial) vibration exciter (unbalanced rotor) and overrunning clutches ensuring the robot’s wheels rotation in one direction. The research methodology is divided into three basic stages: developing the robot’s dynamic diagram and deriving the motion equations followed by numerical modelling in the Mathematica software; designing the 3D-model and simulating the robot motion in the SolidWorks software; creating the experimental prototype and conducting the full-scale tests. The obtained results show the time dependencies of the robot’s body acceleration, speed, and displacement at certain operational conditions. The main scientific novelty of the paper resides in substantiating the relationships between the robot’s design parameters and its dynamic characteristics under different operational conditions. The performed investigations can be useful for researchers and designers dealing with the vibration-driven robots, capsule-type locomotion systems, pipelines inspecting vehicles, etc.
Methodology of technological design in the restoration of parts
Authors: Permyakov Alexander , Nemyrovskyi Yakiv , Posviatenko Eduard , Shepelenko Ihor 
Published: March 2023

Abstract
In the work, from the standpoint of a systematic approach, a methodology for technological design of repair and restoration of worn parts using methods to improve the quality of the working layer is proposed. For the stages of the product life cycle, solving the problem of extending the service life after repair and restoration of worn parts, a general scheme and structure of information support for technological design were developed using restoration methods that ensure and improve the quality of the working layer. A variant of the technological process for the restoration of cylinder liners from modified gray cast iron by a combination of surface plastic deformation (SPD) and finishing antifriction non-abrasive treatment (FANT) is proposed.
Comparative studies of the three-body abrasion wear resistance of hardfacing Fe-Cr-C-B-Ti alloy
Authors: Trembach B 
Published: March 2023

Abstract
In this research, the mechanical and tribological properties of two deposited metal of Fe-C-Cr-B-Ti alloying systems. In this study, comparative tests of the deposited metal hardfacing by two self-shielded flux-cored wires electrode were carried out: with an exothermic additive (110Cr4Cu5Ti1MnVB) and without an exothermic additive (140Cr15TiSi1MnVB). Abrasive wear resistance was evaluated using a slightly modified procedure on a standardized tribological machine for abrasive wear, according to the limits established by the ASTM G65. The results of studies of the efficiency of introduction of an exothermic addition CuO-Al system into the core filler of a flux-cored wire electrode were presented.
Accuracy of Thread Profile Depends on the Lathe Tool Angle of Inclination. Theoretical Investigation
Authors: Onysko O R , Kusyi Ya M , Kopei V B , Dzhus A P 
Published: March 2023

Abstract
Among threaded connections of large sizes, tapered thread pipe connections are especially often used, which are a very important part of drill strings. The efficiency of the drill strings largely depends on the accuracy of the tool-joint tapered thread. The production of such joints is implemented on lathes, with the help of tools that have a carbid insert. To ensure high performance, such inserts are recommended to be installed not parallel to the axis of the thread, but at the lead angle of thread. However, the profile of the insert itself is equal to the profile of the thread, and therefore it is important to have a theoretical predictive calculation of the probable influence of the angular setting of the carbide insert on the accuracy of the thread. Based on a detailed consideration of the geometry of the mutual placement of the plate and the tapered thread and the kinematic features of the process, an algorithm for predictive calculation of the accuracy of the thread is created. The result shows that only one of the parameters of the cutting edge really depends on the angle of inclination of the cutting edge - it is its profile. The deviation can reach 7% of the tolerance on the semi-profile angle.
Composite wheat-amaranth flour baking properties and bread freshness
Authors: Yr Mykolenko S , Aliiev E B , Yr Dudin V 
Published: March 2023

Abstract
The study has reviled the benefits of amaranth groat flour application into wheat bread making towards enhancing the technological efficiency and the quality of the bread, prolonging the freshness of the product without artificial improvers involved in the formulations. Paying attention to textural characteristics of the wheat-amaranth bread during its shelf-life, amaranth groat flour as a derived product of amaranth grain processing presented a positive impact on the change of textural properties of the bread crumb during wheat-amaranth bread shelf-life. The effect of ranging 5–30% substitution of common wheat high-grade flour by the amaranth flour derived from partially defatted amaranth grain was investigated and the complex organoleptic quality of the bread made of the composite flour reached the highest level at 15% of the amaranth flour in the formulation. The technological parameters of bread making such as the duration of proofing, shape stability, specific volume, crumb porosity, baking and drying losses, when wheat high-grade flour was partially replaced by the amaranth grain-derived milling product showed better performance for the bread enriched by the amaranth flour at higher substitution level approving the wider application of the pseudocereal flour in the food industry. The freshness of the bread made of the composite flour is related to the textural characteristics of the crumb which tend to change drastically due to styling. The amaranth groat flour application into the wheat bread formulation led to changes in compressive force and tension of the crumb, the stress value at relative strain ε = 25%, the elastic modulus, and the statical elastic hysteresis index. The resulting application of the amaranth groat flour into bread formulation allowed to ensure a 2-2.5-fold increase in the freshness of wheat bread with a 15% amaranth groat flour content when providing higher comprehensive quality of the product.
Specificity of the stress-strain and thermodynamic state simulation of the titanium alloy workpiece in the cutting zone
Authors: Stupnytskyy V , She Xianning , Stupnytska N 
Published: March 2023

Abstract
Titanium alloys have specific mechanical and physical-chemical properties that significantly reduce their machinability. Providing high productivity and accuracy has a great sense at the stage of technological preparation of machine-building production, taking into account the high cost of products from titanium alloys, as well as the need to provide increased operational properties. Simulation of machining processes of titanium alloys has many differences from the simulation of cutting of medium-carbon steels. This article focuses on recommendations for selecting an effective cutting model, describing the specific rheological properties of titanium alloys, optimizing solver selection, and cutting fracture criteria. The stages of adiabatic shear are described. The use of these recommendations contributes to the development of a more adequate model of machining titanium alloys and the choice of optimal cutting parameters to ensure a given quality of the machined surface layer of the workpiece.
The method of experimental determination of tangential stresses on the surface of flow around with a gaseous medium
Authors: Dmytriv T V , Lanets O S , Dmytriv V T , Dmytriv I V , Horodetskyy I M , Horodetska N G 
Published: March 2023

Abstract
Experimental research of the force load on the flow around surface is important for the design of aircraft and gas transport systems. The main parameter is the tangential stress, which is maximum in the boundary layer on the flow around surface. The velocity in the boundary layer and its thickness affect the tangential stresses that arise during the flow of the medium. They also have an influence on the friction coefficient, which characterizes the pressure losses. In the work, the method of experimental measurement of velocity on the flow around surface is considered, and an information and measurement system is proposed for determining the tangential stresses on the flow around surface based on the flow velocity measurement in the boundary layer. The algorithm of the measurement technique is presented in the form of a functional structural scheme of the laminar boundary layer on the surface of the flow around. The sensor for measuring the velocity in the boundary layer is installed at characteristic points namely at
x
distance from the front border of the flow around surface, and also at
y
height from the surface of the boundary layer. The results of the planned factorial experiment of air flow around the surface are given. The factors were the
v
0
velocity of the air flow entering the flow around surface, the
x
distance from the edge of the surface, the
y
distance from the surface along the thickness of the layer. The response criterion was the calculated value of the tangential stress based on the
vx

measured flow velocity at a given point of the boundary layer. The developed method of studying the velocity distribution and determining the tangential stresses on the surface of the flow around under a dynamic boundary layer makes it possible to determine with high discreteness the parameters of the process of the surface around flow of a Newtonian gaseous medium.
Research of the dynamics of a vibrating grain cleaning separator with vertical sieves layering
Authors: Topilnytskyy V G , Rebot D P 
Published: March 2023

Abstract
The construction of a vibrating grain cleaning separator is proposed and its nonlinear mathematical model with vertical layering of sieves is built. The system of analytical expressions obtained on the basis of asymptotic methods of nonlinear mechanics and the Lagrange equation of the second kind is taken as the model. The model makes it possible to describe the movement of the oscillating part of the grain cleaning separator. The non-linearity of the obtained model will enable its further use for a number of similar separators with different design features. With its help, the impact of the main design parameters of the separator and the kinematic indicators of its drive on the characteristics of its movement and the intensity of the separation process is determined.
Simulation of the Production and Transport Problem in the FlexSim Environment
Authors: Velyka O T , Martyn E V , Liaskovska S E 
Published: March 2023

Abstract
The method of building a simulation model of the production and transportation problem is described. In the FlexSIM environment, a simulation model of a part of the production process was built and the impact of changing input parameters on output parameters and the behavior of the technological system as a whole was investigated and analyzed.
Impact of active sites on encapsulation of curcumin in Metal Organic Frameworks
Authors: Munasinghe Vihanga K , Manawadu Dilhan , de Silva Rohini M , de Silva K M Nalin 
Published: March 2023

Abstract
In this study, we present the investigation of the curcumin loading and release properties of four different Metal-Organic Frameworks (MOFs) with varying metal centres and organic ligands. Through our research, we have identified HKUST-1 and MIL-100, highly porous copper and iron-containing MOFs, that exhibit specific interactions with curcumin, leading to high encapsulation efficiencies (55%–75%) even at low concentrations as 6 ppm. The binding modes of curcumin onto MOFs have been investigated using a combined experimental and computational approach. Furthermore, our drug-releasing studies have revealed slow and prolonged release for over two days, which further indicates the specific interactions of curcumin with HKUST-1 and MIL-100. To the best of our knowledge, this is the first comparative study that investigates the drug delivery properties of curcumin using Copper, Ferrous, and Zinc MOFs. Our findings pave the way for the development of stable, highly interactive MOFs as drug carriers for curcumin, which has the potential to overcome its poor aqueous solubility and rapid metabolism, and enhance its pharmacological activities in medicine.
Effect of W-Mo doping on the phase transition temperature of VO2 synthesized by hydrothermal microwave method
Authors: Liu Yan , Jiang Tienan , Lv Yang , Zhou Xinyu , Zhu Henan , Shen Qihui 
Published: March 2023

Abstract
In this study, the combination of hydrothermal microwave technology and high-temperature method was used to efficiently control the formation of M-phase vanadium dioxide (VO2) nanoparticles, which were promising materials for optoelectronic switches and smart windows due to their excellent optoelectronic properties during the phase transition. The phase state and structure of VO2depended on its synthesis parameters, and the results showed that the optimal conditions for VO2(B) synthesis in a hydrothermal microwave were 120 °C for 2 h, which was a novel method for efficiently preparing VO2(B) at a low temperature. By vacuum annealing, VO2(B) could be transformed into monoclinic VO2(R), where VO2(R) converts into VO2(M) on cooling to room temperature. Furthermore, the phase transition temperature of W-Mo co-doped VO2(M) decreased by 14.8 °C, showing that the incorporation of W-Mo elements into the VO2-based structure affects the material’s phase transition temperature.
Facile growth of high-yield and -crystallinity vertically aligned carbon nanotubes via a sublimated ferric chloride catalyst precursor
Authors: Goktas Hilal , Lachman Noa , Kalfon-Cohen Estelle , Wang Xiaoxue , Torosian Stephen , Gleason Karen K , Wardle Brian L 
Published: March 2023

Abstract
A facile and effective catalyst deposition process for carbon nanotube (CNT) array growth via chemical vapor deposition using a resistively heated thermal evaporation technique to sublimate FeCl3 onto the substrate is demonstrated. The catalytic activity of the sublimated FeCl3 catalyst precursor is shown to be comparable to the well-studied e-beam evaporated Fe catalyst, and the resulting vertically aligned CNTs (VA-CNTs) have a similar diameter, walls, and defects, as well as improved bulk electrical conductivity. In contrast to standard e-beam-deposited Fe, which yields base-growth CNTs, scanning and transmission electron microscopy and X-ray photoelectron spectroscopy characterizations reveal a tip-growth mechanism for the FeCl3-derived VA-CNT arrays/forests. The FeCl3-derived forests have a lower (∼1/3 less) longitudinal indentation modulus, but higher longitudinal electrical conductivity (greater than twice) than that of the e-beam Fe-grown CNT arrays. The sublimation process to grow high-quality VA-CNTs is a highly facile and scalable process (extensive substrate shape and size, and moderate vacuum and temperatures) that provides a new route to synthesizing aligned CNT forests for numerous applications.
Analysis of the effect of each plant hormone on the maturation of woodland strawberry fruit in auxin-induced parthenocarpic fruit
Authors: Umemura Hayato , Nakajima Masatoshi , Ishii Hikari , Kurokura Takeshi , Asami Tadao , Shimada Yukihisa , Nakamura Ayako 
Published: March 2023

ABSTRACT
Evaluation of individual roles of plant hormones in fruit development is difficult because various plant hormones function simultaneously. In this study, to analyze the effect of plant hormones on fruit maturation one by one, plant hormones were applied to auxin-induced parthenocarpic woodland strawberry (Fragaria vesca) fruits. As a result, auxin, gibberellin (GA), and jasmonate, but, not abscisic acid and ethylene increased the proportion of ultimately mature fruits. So far, to produce comparable fruit with pollinated fruit in size, auxin with GA treatment was required in woodland strawberry. Picrolam (Pic), the most potent auxin in inducing parthenocarpic fruit, induced fruit which is comparable in size with pollinated fruit without GA. The endogenous GA level and the result of the RNA interference analysis of the main GA biosynthetic gene suggest that a basal level of endogenous GA is essential for fruit development. The effect of other plant hormones was also discussed.
Benchmarking genome assembly methods on metagenomic sequencing data
Authors: Zhang Zhenmiao , Yang Chao , Veldsman Werner Pieter , Fang Xiaodong , Zhang Lu 
Published: March 2023

AbstractMetagenome assembly is an efficient approach to reconstruct microbial genomes from metagenomic sequencing data. Although short-read sequencing has been widely used for metagenome assembly, linked- and long-read sequencing have shown their advancements in assembly by providing long-range DNA connectedness. Many metagenome assembly tools were developed to simplify the assembly graphs and resolve the repeats in microbial genomes. However, there remains no comprehensive evaluation of metagenomic sequencing technologies, and there is a lack of practical guidance on selecting the appropriate metagenome assembly tools. This paper presents a comprehensive benchmark of 19 commonly used assembly tools applied to metagenomic sequencing datasets obtained from simulation, mock communities or human gut microbiomes. These datasets were generated using mainstream sequencing platforms, such as Illumina and BGISEQ short-read sequencing, 10x Genomics linked-read sequencing, and PacBio and Oxford Nanopore long-read sequencing. The assembly tools were extensively evaluated against many criteria, which revealed that long-read assemblers generated high contig contiguity but failed to reveal some medium- and high-quality metagenome-assembled genomes (MAGs). Linked-read assemblers obtained the highest number of overall near-complete MAGs from the human gut microbiomes. Hybrid assemblers using both short- and long-read sequencing were promising methods to improve both total assembly length and the number of near-complete MAGs. This paper also discussed the running time and peak memory consumption of these assembly tools and provided practical guidance on selecting them.
Establishment and characterization of oviductal organoids from farm and companion animals
Authors: Lawson Edwina F , Ghosh Arnab , Blanch Victoria , Grupen Christopher G , Aitken Robert John , Lim Rebecca , Drury Hannah R , Baker Mark A , Gibb Zamira , Tanwar Pradeep S 
Published: March 2023

Abstract
Organoid technology has provided a unique opportunity to study early human development and decipher various steps involved in the pathogenesis of disease. The technology is already used in clinics to improve human patient outcomes. However, limited knowledge of the methodologies required to establish organoid culture systems in domestic animals has slowed the advancement and application of organoid technology in veterinary medicine. This is particularly true for the field of reproduction and the application of assisted reproductive technologies (ART). Here, we have developed a platform to grow oviductal organoids from five domestic species—bovine, porcine, equine, feline, and canine. The organoids were grown progressively from single cells derived from the enzymatic digestion of freshly collected infundibular/fimbrial samples. The addition of WNT, TGFβ, BMP, ROCK, and Notch signaling pathway activators or inhibitors to the organoid culture medium suggested remarkable conservation of the molecular signals involved in oviductal epithelial development and differentiation across species. The gross morphology of organoids from all the domestic species was initially similar. However, some differences in size, complexity, and growth rate were subsequently observed and described. After 21 days, well-defined and synchronized motile ciliated cells were observed in organoids. Histopathologically, oviductal organoids mimicked their respective native tissue. In summary, we have carried out a detailed cross-species comparison of oviductal organoids, which would be valuable in advancing our knowledge of oviduct physiology and, potentially, help in increasing the success of ART.