bluuebunny/crossref_metadata_2025 huggingface dataset:
Formation of professional competencies of future scientific and scientific-pedagogical workers in the field of physical culture
Authors: Omelchuk O. , Domina Zh.
Published: June 2023

Today, special attention should be paid to the problem of training future researchers and research and teaching staff in the field of physical education. In the process of postgraduate studies, the final formation of a scientist, research and teaching staff takes place: their professional qualities and skills, professional abilities and skills for the implementation of educational, methodological and scientific work in higher education institutions with a focus on European standards of higher education. The purpose of the article is to highlight the problem of forming the professional competence of future researchers and scientific and pedagogical workers in the field of physical culture. The main tasks are to carry out a content analysis of the literature on this issue, to consider ways to form the professional competence of future researchers and research and teaching staff in the field of physical education. It has been found, that the learning process involves obtaining a high level of multifunctional metacompetencies in the field of physical education; these are Soft Skills (creativity, emotional intelligence, critical thinking, stress resistance), Hard Skills (the basis of activity and professional skills), and Meta Skills (helps to learn new skills). Therefore, PhDs must be highly qualified and have in-depth knowledge of physical education. Among the main multifunctional meta-competencies that future researchers and research and teaching staff in the field of physical education should acquire in the process of training, we have identified: cognitive-intellectual, subject; motivational; language- communicative; design and research-innovation; pedagogical partnership; organizational; information and digital for communication, cooperation and professional development; reflective; inclusive; health-saving; evaluation and analytical.
Increasing the physical preliminary of children aged 6–7 in figure skating
Authors: Osadtsiv Taras , Petryna Lesia , Tetiana Tokar , Khokhlova Alina
Published: June 2023

The article presents the results of a study of the peculiarities of the use of various methods and means of physical training of young athletes in figure skating. The purpose – of the work is to improve the physical preliminary of children in figure skating. The research used a group of theoretical and empirical methods. Pedagogical observations of 22 training sessions were conducted. Testing was conducted on the basis of the sports club "Ice school" in Lviv, in which 18 figure skaters aged 6–7 years took part. Based on a survey of 14 Ukrainian figure skating specialists, it was established that in the system of integral training of children aged 6–7 years, the most significant are technical (ice – 30.0% and in the hall – 20.0%), physical (24.0%) and choreographic (22.0%) types of training; others – at this stage of sports improvement, do not have a significant impact on the competitive result of beginner figure skaters; classes five times a week lasting up to 45 minutes each will be optimal; all interviewed respondents consider it appropriate to use a special set of auxiliary exercises at this stage of skater training. As a result of intermediate testing, the effectiveness of the proposed method of classes with the inclusion of a special complex of Tabatha exercises in the educational and training process was proven. Timely adjustment of children's physical preliminary, during the duration of this experiment, made it possible to improve the average level of power endurance of figure skaters by 21.8% according to all the studied criteria. The obtained results of the research complement certain provisions of the theory of training of athletes and will contribute to the introduction of new forms and methods of conducting classes with young beginner figure skaters.
Elastic and Anelastic Behavior of TBCs Sprayed at High Deposition Rates
Authors: Valarezo A. , Dwivedi G. , Sampath S. , Musalek R. , Matejicek J.
Published: June 2023

This study investigates the effect of high deposition rates and temperatures on the formation of vertical segmentation cracks in thermal barrier coatings. YSZ layers were deposited by atmospheric plasma spraying using different powder feed rates, raster speeds, and spraying distances. Coating cross-sections were examined, elastic properties were measured, and thermal conductivity was determined by laser flash testing. Coating structures with vertical and horizontal cracks are shown to be anelastic with high strain tolerance, even after heat treating at 1100 °C.
Characterization of a HVOF-Sprayed WC-CoCr Coating Before and After Laser-Assisted Turning
Authors: Bobzin K. , Zhao L. , Öte M. , Linke T. F. , Klocke F. , Brummer C. , Graefe S.
Published: June 2023

This study evaluates a new surface finishing process called laser-assisted turning. WC-CoCr coatings were produced by HVOF spraying and characterized based on surface morphology, microstructure, and friction and wear properties. The coatings were then treated using the new process and re-examined and tested. Surface roughness and hardness were significantly improved, although friction and wear properties were found to be inferior to those of WC-CoCr coatings finished by grinding and polishing.
Influence of Process Parameters and Feedstock Selection on Coating Microstructures with a Cascaded Plasma Torch
Authors: Chen D. , Dambra C. , Sabouni O.
Published: June 2023

Three YSZ powders with different particle size distributions and an ethanol-based YSZ suspension were deposited on steel substrates using a cascaded plasma torch with a 9 mm nozzle. Coatings with dense, porous, segmented, and columnar microstructures were achieved by varying process parameters such as gun current, argon flow rate, spray distance, and suspension injection pressure. Linear relationships between in-flight particle state and process variables were observed and are shown to correlate well with coating structure and porosity.
Thermal Sprayed Y2O3-Al2O3-SiO2 (YAS) Coatings for Environmental Protection of SiC Ceramics
Authors: García E. , Nistal A. , Sainz M. A. , Osendi M. I. , Miranzo P. , Martín de la Escalera F. , Khalifa A.
Published: June 2023

In this work, a low-temperature melting composition located within the glass-forming region of the Y2O3-Al2O3-SiO2 (YAS) system is proposed and tested as a protective coating for SiC ceramics. Glassy coatings 197 µm thick were obtained by flame spraying YAS granules on SiC substrates that had been grit blasted and coated with a Si bond layer. Bulk glasses of the same composition were also produced for use as a reference material. The hardness, elastic modulus, and thermal conductivity of the coatings and bulk specimens were evaluated and compared and the effect of heat treatment was investigated. Crystallization occurred in both the bulk glass and coating during isothermal treatments in air at 1100-1350 °C, but it did not compromise system integrity due to crack healing.
Surface Morphology and Bioactivity of Copper Alloy Coatings
Authors: Shafaghi R. , Pershin L. , Mostaghimi J. , Ringuette M.
Published: June 2023

The aim of this study is to evaluate the antimicrobial properties of wire-arc-sprayed Cu-Ni-Zn alloy coatings. The biocidal efficacy of the coatings is compared to that of stainless steel and sheet metal using Escherichia Coli as a contaminant. The influence of surface roughness on biocidal activity is investigated as well.
Influence of the Powder Morphology and Plasma Spray Process Parameters on the Structure and Properties of Al2O3 Based Plasma Sprayed Coatings
Authors: Matikainen V. , Koivuluoto H. , Vuoristo P. , Larjo J.
Published: June 2023

In this investigation, alumina powders prepared by different methods were sprayed on carbon steel substrates using a conventional plasma torch with radial injection. The spraying process and powder injection parameters were varied and the injection behavior of the powder was studied. Changes in particle acceleration, deceleration, and impact were measured with novel spray diagnostic equipment and are correlated with the structure and properties of the coatings obtained. Dense coatings were achieved with several agglomerated-and-sintered Al2O3 powders, although higher impact velocities and temperatures were recorded for the larger and denser fused-and-crushed particles.
Cold Spraying of Amorphous Cu50Zr50 Alloys
Authors: List A. , Gärtner F. , Assadi H. , Klassen T. , Mori T. , Kuroda S.
Published: June 2023

In this investigation, cold spraying is used to deposit a simple binary amorphous alloy with technical purity. Cu50Zr50 was chosen as the model system due to its glass-forming ability and insensitivity to changes in composition. Critical velocities for coating formation were experimentally determined by systematic variation of spray parameter sets. These values were then used to tune existing bonding models to cold spraying of amorphous Cu50Zr50 powder. It is shown that under suitable conditions, well adhering coatings with the amorphous structure of the powder can be obtained by cold spraying with nitrogen as the process gas.
Microstructure and High-Temperature Corrosion Behavior of Wire-Arc Sprayed Fe-Based Coatings
Authors: Li R. , He D. , Zhou Z. , Wang G. , Jiang J.
Published: June 2023

In this study, Fe-Cr-Al and Fe-Cr-Al-B cored wires were produced and deposited on steel substrates by wire arc spraying. The microstructure, hardness, and high-temperature corrosion behavior of the cored-wire deposits were evaluated in comparison to Fe-Cr and commercial Fe-Cr-Al solid-wire coatings. All coating samples exhibited lamellar microstructures with oxide inclusions, the fewest being in the Fe-Cr-Al-B deposits. Microhardness was measured along coating cross-sections at various distances from the coating-substrate interface. The Fe-Cr coatings were the hardest, followed by the Fe-Cr-Al-B deposits. Thermogravimetric analysis was used to evaluate high-temperature corrosion behavior in a molten salt environment under cyclic conditions, with the Fe-Cr-Al-B cored-wire deposits performing the best.
Plasma Sprayed Y2O3 Coating on C-FRP with Aim of Development of Future Mold Materials for Integrated Circuit Encapsulation
Authors: Ganesan A. , Yamada M. , Fukumoto M. , Kitaoka S.
Published: June 2023

The aim of this study is to improve the releasability of carbon fiber reinforced plastic (C-FRP) molds by depositing a plasma-sprayed Y2O3 coating on working surfaces. Composite molds are considered for use in IC encapsulation. To promote adhesion, an interlayer, either copper or gradient yttria, is applied between the substrate and coating. The coatings deposited over gradient Y2O3 performed better than coatings applied over copper due to the large reduction in thermal mismatch achieved with a graded thermal expansion coefficient. Preliminary releasability results show that the yttria coatings have high adhesion strength and the potential to uniformly reduce release forces between C-FRP surfaces and epoxy resins.
Insulating Coatings for High-Performance Electronic Components Produced by Thermal Spraying Considering Electrical and Mechanical Characteristics
Authors: Cichosz M. , Trenkle F. , Hartmann S. , Wilde J.
Published: June 2023

This work investigates the properties of insulating coatings deposited by HVOF and atmospheric plasma spraying and the effects of various sealants. It is shown that adhesive tensile strength depends strongly on surface roughness and that the dielectric strength of a material is normally higher in the unsealed state. In the case of a new sealant, however, the dielectric strength of HVOF sprayed alumina coatings is shown to be higher in the sealed state, which potentially opens new applications in high-performance electronics.
Lanthanum and Gadolinium Zirconate Thermal Barrier Coatings Structure and Properties Evolution
Authors: Mazilin I. , Baldaev L. , Drobot D.
Published: June 2023

In this study, lanthanum (LZ) and gadolinium zirconate (GZ) powders were prepared by spray drying and deposited on graphite substrates by air plasma spraying. Free-standing 1-1.5 mm thick LZ and GZ coating samples were obtained by mechanical delamination and subjected to long-term annealing in air at 1250 °C. Significant changes occurred during heat treating in the form of microstructure evolution, crystal structure ordering, and phase transitions as observed via SEM, XRF, and XRD analysis. These changes affected a number of coating properties, including hardness, porosity, fracture toughness, and thermal conductivity. In the first 20 h, thermal conductivity increased in gadolinium zirconate from 0.5 to 1.0 W/m·K and in lanthanum zirconate from 0.5 to 1.5 W/m·K.
Design of Experiment Oriented Fluid Simulation for the Virtual Improvement of the Air-Cap Configuration in Twin-Wire Arc-Spraying (TWAS) Process
Authors: Tillmann W. , Abdulgader M. , Anjami N. , Hagen L.
Published: June 2023

In this work, CFD simulations are used to evaluate air cap configurations for twin wire arc spraying (TWAS). Investigators employed a design of experiments (DoE) approach to identify air cap parameters with the greatest impact on gas velocity, jet convergence, and pressure distribution. The ones selected for study are the convergence angle, the length and diameter of the throat, and the distance between the air cap outlet and the point where the wires intersect. In all configurations studied, the spray wires deflected the flow of the primary gas and narrowed the cross-section of the plume along one axis. The effects of each air cap parameter are discussed in the paper along with possible design improvements.
Investigation of HVOF-Sprayed (Ti, Mo)(C, N)-Ni Hardmetal Coatings for Static Friction Applications
Authors: Berger L.-M. , Shakhverdova I. , Puschmann R. , Gräfensteiner M. , Leidich E. , Schiefer S. , Gerlach M.
Published: June 2023

This paper presents the results of a study on the static friction properties of (Ti,Mo)(C,N)-Ni hardmetal coatings deposited by HVOF spraying. Coating samples were sprayed on quenched and tempered CrMo steel friction rings using an experimental feedstock powder. Friction surfaces were characterized based on the geometry and distribution of prominent peaks and static coefficient of friction was measured. Test results show that the hardmetal coatings have good potential for use in frictionally engaged joints, but more work is needed to establish a correlation between coating properties and friction behavior.
Application and Practice of WC Cermet Sprayed Composite Coating Technology in the Hot-Dip Galvanizing Line
Authors: Wang L.
Published: June 2023

This paper describes a new composite coating technology developed for hot dip galvanizing rolls used in automotive manufacturing. The multilayer coating consists of HVOF sprayed WC and electroless Ni-P plating. Coating surfaces and cross-sections are examined and adhesion strength, friction, and wear resistance are measured. In addition, changes in surface roughness are recorded on galvanizing rolls after three months of service.
Thermal Sprayed Protective Coatings for Superplastic Forming Ceramic Dies: A Monitoring System of Die Condition
Authors: Staiano A. , Ion W. , O’Hare L.
Published: June 2023

Superplastic forming (SPF) is an advanced sheet manufacturing process typically used for low- volume, high-value products. SPF dies made from refractory castables have a lower production cost than metal dies, but their brittle nature is a limiting factor. This work investigates surface degradation mechanisms in ceramic dies and how they are affected by the application of thermal spray coatings. Among the more notable accomplishments of the study is the development of a test rig that simulates die-part interface conditions during superplastic forming and monitors die wear, making it possible to predict ceramic die lifetime for different coatings.
Interface Characterization and Bonding Mechanisms of Cold Gas Sprayed Al Coatings on Ceramic Substrates
Authors: Drehmann R. , Grund T. , Lampke T. , Wielage B. , Manygoats K. , Schucknecht T. , Rafaja D.
Published: June 2023

This work investigates the adhesion mechanisms associated with cold gas sprayed metallic coatings on ceramic substrates. Aluminum layers were deposited on sintered corundum plates and single-crystalline sapphire substrates with different lattice orientations. Examination of the interface region showed that adhesion was the result of recrystallisation and heteroepitaxial growth. Cold spray aluminum coatings were also deposited on Al2O3, AlN, Si3N4, and SiC substrates to determine if ionic bonding plays a role in interface formation. For comparison, aluminum coatings produced by physical vapor deposition were also examined.
Investigation of the Effect of Porosity Content on the Flexural Behavior of Nickel Foam Core Sandwich Structures with Arc Sprayed Alloy 625 Skin
Authors: Salavati S. , Pershin L. , Coyle T. W. , Mostaghimi J.
Published: June 2023

In this study, porous and dense layers of alloy 625 are deposited on nickel foam sheets using a modified twin wire arc spraying process. Sandwich panels with arc-sprayed alloy 625 skins on nickel foam cores were fabricated then subjected to four-point bend testing. The effects of skin porosity on flexural rigidity and overall mechanical behavior are investigated. The ductility of porous alloy 625 skins was improved after heat treatment at 1100 °C for 3 h.
3D μCT and SEM Analysis of Resolidified Tips of Cored Wires Used in Twin Wire Arc Spraying
Authors: Nellesen J. , Abdulgader M. , Tillmann W. , Beckmann F.
Published: June 2023

The homogeneity of thermal spray plumes is mostly dependent on the type of feedstock used. Powdery feedstocks, for example, promote homogeneity. If in-flight particles are atomized from a melting bath, however, as in twin wire arc spraying (TWAS), the spray jet is less homogeneous due to the fact that particles are generated by the impingement of an airflow on the melting tips of electrically conducting wires. This work aims to contribute to the understanding of the initiation of such particles in the TWAS process. To that end, cored wires filled with W-rich particles were sprayed, then the process was halted and the wire tips were examined to analyze how the filling powder interacts with the melted part of the velum. 3D tomograms show that the resolidified melt bath is interspersed with spherical and irregular-shaped W-rich particles. The irregular shape implies a partial melting of the W-rich particles.
Study of the Residual Stress Distribution of Thermally-Sprayed TBCs Involving Various Interfaces and Laser Drilling
Authors: Guinard C. , Guipont V. , Jeandin M. , Montay G.
Published: June 2023

The aim of this study is to measure residual stress profiles in conventional and continuously graded thermal barrier coatings (TBCs), including those with laser-drilled effusion holes added to improve heat protection. Three sets of TBCs with different bond coat-topcoat interfaces were produced on Haynes 188 substrates. Two sample sets were prepared by plasma spraying NiCrAlY and YSZ powders, in one case, at fixed feedrates, and in the other, at feedrates simultaneously changing in opposite directions. A third sample set was obtained by combining a cold-sprayed CoNiCrAlY bond coat with a plasma-sprayed YSZ topcoat. Residual stress profiles were measured by means of incremental-step hole drilling and speckle interferometry. An original test method was also developed and is used to determine residual stress gradients before and after effusion hole drilling. The results are presented and discussed along with best practices for controlling residual stresses.
Atmospheric Plasmadynamic System in Thermal Spraying and Hardening
Authors: Chivel Yu.
Published: June 2023

This paper presents a new method for producing high-energy pulsed plasma flows with a dc air torch and demonstrates its use in surface hardening and thermal spraying applications. The method employs electromagnetic plasmadynamics and is capable of generating high-frequency pulsed-periodic plasmas at atmospheric and high pressure. Plasma flow velocities of 3-5 x 103 m/s at temperatures of 15 x 103 K have been achieved.
Chemical Reactions of Different Types in Detonation Sprayed Powders as Tools of Coating Design
Authors: Ulianitsky V. Yu. , Batraev I. S. , Dudina D. V. , Bulina N. V.
Published: June 2023

This work shows that with computer-controlled detonation spraying, the phase composition of coatings can be changed relative to that of the feedstock powders. New phases can appear in substantial quantities due to chemical reactions of reduction, oxidation, and nitridation as well as interfacial interactions between phases in composite powders. The key advantage of computer control is that it precisely regulates the quantity and stoichiometry of explosive gas mixtures. It has thereby been found that TiO2 experiences partial reduction to titanium suboxides and that chemical reactions with nitrogen are also possible. It has also been found that when nitrogen is present, titanium aluminides, Ti3Al and TiAl, are likely to form nitrides in the sprayed coatings. Interfacial reactions between the phases of a composite have been studied, and in the case of the Ti3SiC2-Cu system, it has been found that deintercalation of Si can be prevented by maintaining relatively cold spraying conditions. At higher temperatures, coatings of an unusual phase composition form in which carbon-deficient TiCx inclusions are distributed in the Cu matrix as modified by the dissolution of silicon. The formation of new phases affects coating microstructure development and results in new microstructural features.
Performance Analysis of Hard Coatings Applied by Different Processes on Carbon Steel
Authors: Lima C. R. C. , Libardi R. , Camargo F. , Mojena M. A. R. , Fals H. C. , Ferraresi V. A.
Published: June 2023

This work evaluates and compares the properties of weld overlays and thermal spray coatings produced using different feedstock materials. The mechanical and metallurgical characteristics of the coatings and their performance in corrosion and wear tests are discussed.
Effects of Spray Parameters and Heat Treatment on the Microstructure and Mechanical Properties of Titanium Coatings Formed by Warm Spraying
Authors: Molak R. , Kuroda S. , Araki H. , Watanabe M. , Katanoda H. , Ohno N. , Fukanuma H.
Published: June 2023

In this present work, investigators determine how particle temperature, combustion pressure, and heat treatment affect the porosity, oxide content, and tensile properties of warm-sprayed titanium. Coatings were deposited with nitrogen flow rates ranging from 0.5 to 1.5 m3/min and combustion pressures of 1 and 4 MPa. Optimal coating properties were found for specimens formed at a nitrogen flow rate of 0.75 m3/min and a combustion pressure of 4 MPa. Post-spray heat treatment was found to improve bonding between deposited particles, significantly increasing the strength and ductility of the titanium coatings.
Modeling the Gas Flow and Coating Particles in the Hydrogen Fueled HVOF Process
Authors: Pinomaa T. , Suhonen T. , Varis T.
Published: June 2023

In this work, a CFD model is built to investigate gas flow and in-flight particle characteristics in HVOF spraying with hydrogen as the fuel. Gas flow is solved for a particle-free jet, combustion is represented using a simple eddy-dissipation model, and a time-averaged fluid flow (k-ε) model is used to account for turbulence. Acceleration and heating of individual particles are modeled in a "snapshot" of the gas flow. Particle acceleration is shown to be governed by drag and particle heating by conduction and radiation between particulates and gas phases. Modeling results agree well with experimentally obtained data and observations.
Laser Diagnostic Techniques for Suspension and Solution Plasma Spraying
Authors: Goutier S. , Varin J. , Duarte W. , Joulia A. , Vardelle M.
Published: June 2023

This study evaluates laser-based diagnostic methods that can be used to control the injection of liquid feedstocks into a plasma jet and to monitor the size and velocity of particles and droplets in different zones. It demonstrates the capabilities of shadowgraphy and particle image velocimetry and investigates the spraying characteristics of different liquid feedstocks and solvents. Suspension plasma spraying examples are presented in which variations in droplet-particle velocity and diameter are measured in different areas of the jet.
Detonation Spraying of Hollow Microspherical Alumina Powder
Authors: Ulianitsky V. Yu. , Solonenko O. P. , Smirnov A. V. , Batraev I. S.
Published: June 2023

This study employs a combination of numerical analysis and experimental testing to obtain a better understanding of the changes that occur in hollow spherical metal-oxide powders during detonation spraying and how they affect coating quality. The heating and melting characteristics of hollow spheres are initially calculated for the general case then refined based on a simple detonation spraying model. The estimates are compared with experimental results obtained from detonation-sprayed Al2O3 coatings produced using fused and crushed, dense spherical, and hollow spherical powders. The coatings as well as the powders are characterized based on morphology, particle size distribution, splat formation, cross-sectional microstructure, porosity, and hardness. Important findings, observations, and correlations are identified and discussed in the paper.
Optimization of High Porosity Thermal Barrier Coatings Generated with a Porosity Former
Authors: Medricky J. , Vilemova M. , Chraska T. , Curry N. , Markocsan N.
Published: June 2023

Dysprosia stabilized zirconia coatings with large globular pores have good potential as TBC topcoats. In previous work, such coatings have been produced by air plasma spraying with the aid of a polymer pore former. The aim of this work is to optimize the spraying parameters. A design of experiments approach was used to create a two-level full factorial test matrix based on spray distance, powder feed rate, and hydrogen flow. An agglomerated and sintered dysprosia stabilized zirconia (DySZ) powder mixed with polymer particles was sprayed on Hastelloy X substrates that had been prepared with NiCoCrAlY bond coats. The coatings obtained were evaluated based on thermal conductivity, thermocyclic fatigue life, and morphology, which are shown to correlate with spray parameters and in-flight particle properties.
Microstructure Characterization of In-Situ Al5Fe2 Intermetallics Particles Reinforced Al Matrix Composite Coating by Annealing Treatment of Cold Sprayed Precursor
Authors: Wang H.-T. , Chen X. , Bai X.-B. , Ji G.-C. , Dong Z.-X.
Published: June 2023

This study investigates the effects of feedstock composition and annealing temperature on cold-sprayed aluminum-iron deposits. Commercially available Al and Fe powders mixed in ratios of 55:45, 75:25, and 85:15 were cold sprayed on aluminum substrates, producing dense coatings that were subsequently annealed at 500 and 550 °C. Solid diffusion reactions between Fe and Al produced Al5Fe2 intermetallic compounds, the morphology and content of which were found to depend on annealing temperature and the composition of the as-sprayed deposit. The Fe particles in the Al matrix were fully consumed via compounding reaction with Al at 550 °C. At higher temperatures, however, the intermetallic particles begin to crack possibly due to large tensile stresses.
Electrocatalytic Behavior of Nickel Coatings Formed by APS and SPS Processes
Authors: Aghasibeig M. , Wuthrich R. , Moreau C. , Dolatabadi A.
Published: June 2023

Intrinsically active nickel electrodes with large porous surface areas have shown promise for producing hydrogen by alkaline water electrolysis. In this study, Ni powder and NiO suspensions were sprayed on Inconel 600 substrates with an atmospheric plasma gun, producing single (Ni, NiO) and double layer (Ni-NiO) coatings. Top surface morphologies were examined, revealing both micro and nano scale features. Based on kinetic parameters obtained from steady-state polarization measurements, APS-SPS coated electrodes are the most catalytically active and thus have the most potential for hydrogen evolution. It is believed that the nanoscale structure increases effective surface area while the microporous structure facilitates mass transport and overcomes hydrogen bubble blockage.
Multi-Scale Multi-Points Inter-Splat Connection Enhanced Sintering Model for Plasma-Sprayed Lamellar TBCs
Authors: Xie H. , Yang G.-J. , Li C.-X. , Li C.-J.
Published: June 2023

Plasma-sprayed thermal barrier coatings are highly insulating due to intersplat pores. High-temperature exposure, however, leads to pore healing and a loss of thermal insulating capability. Previous sintering models based on the healing of iso-thick pores cannot explain the ultrafast sintering kinetics observed during the initial sintering stage. To better understand the sintering process and the kinetics of pore healing, a study was conducted on the changes that occur at the interfaces between lamellae at high temperatures. It was found that splat surfaces develop multiscale convexes, forming bridges between adjacent splats that significantly accelerate pore healing. This model explains the fast sintering kinetics of the initial sintering stage and presents new opportunities to further tailor the sintering kinetics of YSZ coatings and thereby improve TBC performance.
Mitigating Localized Corrosion Using Thermally Sprayed Aluminium Coatings on Welded 25% Cr Superduplex Stainless Steel
Authors: Paul S. , Lu Q.
Published: June 2023

This study assesses the effectiveness of wire arc sprayed aluminum coatings for protecting welded super duplex stainless steel (UNS S32750) in subsea applications. Pitting and crevice corrosion tests were conducted at different potentials in recirculated synthetic seawater maintained at 90 °C with an acidity of 7.5-8.1 pH. After 90 days, the samples were examined, showing no signs of corrosion even in areas where coating defects were present.
Building a High Temperature Corrosion and Erosion Model for Thermal Spray Coatings
Authors: Metsäjoki J. , Oksa M. , Vaari J. , Penttilä K. , Laukkanen A.
Published: June 2023

A multiscale model is being built in order to better understand and predict high-temperature corrosion and erosion properties of thermal spray coatings and materials in general. The approach uses molecular dynamics to predict diffusion kinetics, constrained free energy to determine reactions, and FEA to simulate structure. To obtain oxidation behavior data for validation, surface polished bulk materials and thermal spray coatings were exposed to various temperatures and exposure times. Oxidation depth and diffusion were assessed by optical emission spectroscopy and cross-sectional SEM examination and surface oxidation in grain and lamellae boundaries was characterized by 3D profilometry and SEM-EDS. Rough validation of the model was achieved using indentation test data, and a more complete validation will be done when high-temperature erosion test results are available.
PIV Measurement and Numerical Simulation of the Particle Velocity in a HVAF Spray
Authors: Katanoda H. , Sakata K. , Tagomori K. , Sugiyama N. , Sasaki S. , Shinya Y. , Yasuki M. , Sasaki H. , Nanbu T. , Takashima K.
Published: June 2023

In this study, particle image velocimetry (PIV) is used to measure WC particle velocity during HVAF spraying. Measured velocities are compared with calculated velocities obtained using open source CFD software. Numerical simulation is also used to investigate particle temperatures. With the HVAF gun used, maximum particle velocity is reached around 18 mm from the nozzle exit with a corresponding gas temperature of 1400 K.
Internal Diameter HVAF Spraying for Wear and Corrosion Applications
Authors: Lyphout C. , Björklund S.
Published: June 2023

This study evaluates an internal diameter HVAF spray system and compares coatings characteristics obtained with WC and Cr3C2 based powders with those achieved via standard HVAF spraying. Coating microstructure, phase composition, hardness, roughness, and corrosion resistance are investigated and the potential for further optimization is discussed. It is also shown that the new system can be used for grit-blasting as well as spraying.
Application of GIS technology in cross-border tourism cooperation planning
Authors: Han F. , Aday A. , Zhandilla B.D.
Published: June 2023

Object: The emphasis in this paper is put on the use and importance of GIS technology in tourism. This paper takes the spatial pattern of cross-border tourism cooperation in the Altai Mountains region as the research object. Methods: The research methods are: the terrain analysis, three-dimensional scene simulation, data statistics, suitability analysis, visual domain analysis, transportation network analysis, and project site selection of GIS technology in tourism planning. Findings: The presented research is analytical in nature. The specific application of GIS technology in tourism planning is discussed. Also, 7 types of GIS applications were considered in the paper. In summary, GIS is mainly composed of data input system, data management system, spatial analysis system and data output system. Conclusions: The results of a study of the landscape features of Altai Mountains using GIS technologies prove that the tourist capabilities of the region provide an excellent opportunity to create an international cross-border tourist point. In addition, the full use of GIS technologies in tourism planning can significantly increase the scientific, urgency and efficiency of planning. This is one of the most important directions for the future development of tourist planning.
LUDWIG BERGER VE WOLFGANG AMADEUS MOZART'IN ALLA TURCA ESERLERİNİN KARŞILAŞTIRILMASI
Authors: TINAR Mehmet Özgün , GÜLBEY USTA Özge
Published: June 2023

15. yüzyıldan 18. yüzyıl ortalarına kadar Osmanlı İmparatorluğu ile Kutsal Roma İmparatorluğu arasında bir rekabet söz konusuydu. Rekabeti yaratan dinî faktörler ve matbaanın icadı üzerine insanların kültürel etkileşimlerde bulunmalarını sağlayan Haçlı Seferleri sürecinde hayata geçmiş antlaşmalar sonrasında kökeni Roma İmparatorluğu dönemine kadar uzanan Oryantalizm kavramı yeniden ortaya çıkmıştır. Ortaya çıkan bu kavram üzerine yapılan çalışmalar 16. yüzyılda önem kazanmış ve devletler arasında yeni bir rekabet anlayışı ortaya çıkmıştır. Yapılan misyonerlik çalışmalarının yanı sıra seyahatnameler ile aktarılan bilgiler sonrası Türk Modası olarak bilinen Turquerie kavramı/anlayışı ortaya çıkmış, sosyoloji ve sanat açısından insanlara yeni bir soluk olmuştur.

Türk Modası (Turquerie) sonrasında ortaya çıktığı düşünülen Alla Turca kavramı ve müzikteki yeri hakkında bilgiler, 18. ve 19. yüzyıldaki rekabet sürecinde değişen dengelerin Osmanlı İmparatorluğu ile Kutsal Roma İmparatorluğu’na genel anlamda etkileri, müzikteki Alla Turca kavramının piyanist ve besteci Ludwig Berger (1777-1839) tarafından nasıl ele alındığına, Berger’in hayatına, etkilediği öğrencilerine, eserlerine ve piyano için Alla Turca Op. 8 numaralı eserinin, Mozart’ın K. 331 piyano sonatının üçüncü bölümü Rondo Alla Turca ile benzerlikler/farklılıklar bağlamında karşılaştırılmasına bu makalede yer verilmektedir.
The malicious use of political deepfakes and attempts to neutralize them in Latin America
Authors: Vinogradova Ekaterina
Published: June 2023

Deepfake technology has revolutionized the field of artificial intelligence and communication processes, creating a real threat of misinformation of target audiences on digital platforms. The malicious use of political deepfakes has become widespread between 2017 and 2023. The political leaders of Argentina, Brazil, Colombia and Mexico were attacked with elements of doxing. Fake videos that used the politicians' faces undermined their reputations, diminishing the trust of the electorate, and became an advanced tool for manipulating public opinion. A series of political deepfakes has raised an issue for the countries of the Latin American region to develop timely legal regulation of this threat. The purpose of this study is to identify the threats from the uncontrolled use of political deepfake in Latin America. According to this purpose, the author solves the following tasks: analyzes political deepfakes; identifies the main threats from the use of deepfake technology; examines the legislative features of their use in Latin America. The article describes the main detectors and programs for detecting malicious deepfakes, as well as introduces a scientific definition of political deepfake.
Foreign Direct Investment and Economic Growth in South Africa: Is there a Mutually Beneficial Relationship?
Authors: Prince Makhoba Bongumusa , Talent Zungu Lindokuhle
Published: June 2023

This paper interrogated the impact of foreign direct investment (FDI) on economic growth in the South African economy. The study employed annual time series data covering 1960 to 2019 extracted from the South African Reserve Bank. This study applied impulse response functions within a VAR methodology to analyse the dynamic interrelationships between FDI and economic growth in South Africa. The study discovered that there exists a mutually beneficial relationship between foreign investors and expansion of economic activities consistent with economic growth. A positive shock in FDI leads to a significant growth in South Africa’s economy. Likewise, a positive shock in GDP promotes FDI inflows in South Africa. The study suggested that policymakers ought to consider promulgating prudent macroeconomic policies that can attract FDI consistent with economic prosperity.
Hospital simulado Santa Clara: centro de entrenamiento clínico, investigativo y de innovación docente
Authors: Bethy Cecilia Burbano-Timana
Published: June 2023

El Hospital Simulado Santa Clara de la Universidad Mariana surge como plan estratégico de mejoramiento en el periodo académico julio de 2018, bajo la dirección de las magísteres Yudy Basante Castro, Decana de la Facultad de Ciencias de la Salud y, la coordinación de Bethy Cecilia Burbano Timana.
Emprender como alternativa para forjar futuros
Authors: Hurtado Balcazar Erika Julieth , Chanchi Lizbeth Katherine , Portilla Rengifo Sandra Yuliana
Published: June 2023

La crisis económica que se vive actualmente en el país se evidencia en la falta de fuentes de empleo y, a la vez, por factores desenfrenados que se han desarrollado como el conocimiento y, por ende, por la globalización, puesto que, el mercado demanda cada vez más profesionales competitivos y capacitados, es decir, profesionales que posean un alto nivel para desarrollar competencias. En este sentido, hoy en día, los futuros y nuevos profesionales no cuenta con una absoluta seguridad con respecto a la posibilidad de empleo en el mercado laboral. Por lo tanto, es de suma importancia formar profesionales que estén preparados y sean capaces de fundar su propio negocio. Desde ese punto de vista, es necesario formar emprendedores capaces de identificar las oportunidades que se presentan, muchas veces, a partir de las necesidades de los individuos, emprendedores que sean capaces de evaluar ideas para implementar proyectos que estén sumergidos en los nuevos negocios, siendo competitivos, innovadores y que sean capaces de reinventarse en el mercado laboral.
Propuesta para la implementación de un sistema de gestión de seguridad y salud en el trabajo para la Tienda D1 del barrio Parque Bolívar en Pasto
Authors: Burbano Tatiana Patricia , Jaramillo Jaramillo Anderson Sebastián , Ramírez Apráez Johan Sebastián , Zambrano Hinestrosa Jairo Roberto
Published: June 2023

El objetivo de este trabajo es implementar un Sistema de Gestión de Seguridad y Salud en el Trabajo para el control y prevención de los riesgos existentes en la Tienda D1 ubicada en el barrio Parque Bolívar. Se desarrollóuna metodología enmarcada en el paradigma  positivista, utilizando un método empírico analítico, racionalista, científico, naturalista y tecnológico, para poner a prueba y comprobar las hipótesis mediante el uso de estrategias estadísticas, enfocadas cuantitativamente, destacando un conjunto de procesos secuenciales y probatorios, buscando acciones exactas de las condiciones actuales de la empresa, siendo esta una investigación descriptiva-analítica. Para la muestra se tuvo en cuenta a los ocho trabajadores involucrados en los procesos y procedimientos, obteniendo una serie de documentos que difunden los conocimientos propios de un área. Se utilizó técnicas de recolección de información específicas, como entrevistas y análisis de cargos, dirigidas al supervisor y los colaboradores de las diferentes áreas.
Estudio del comportamiento de los usuarios de Leo Estética, Color y Peluquería de la ciudad de Ipiales
Authors: Arteaga Sarasty Hafra Alejandra , Romero Rodríguez Eveling Guisell , Narváez Paredes Daniel Esteban
Published: June 2023

El presente trabajo trata sobre el estudio del comportamiento de los usuarios de Leo Estética, Color y Peluquería, ubicada en la ciudad de Ipiales, Nariño, en la cual se ha identificado la importancia de establecer una comunicación transversal con sus usuarios, con el fin de garantizar un buen servicio, a partir de las variables que les rodean, desde una perspectiva de mercadeo que garantice conocer mejor quiénes son sus audiencias potenciales y actuales, según sus necesidades, gustos, preferencias, costumbres y deseos.
Emprendimiento social y solidario
Authors: Muñoz Gavilanes Angie Daniela
Published: June 2023

¿Qué es el emprendimiento social? Según la Fundación Ashoka (citada por Gómez et al., 2022),El emprendimiento social es el proceso mediante el cual los ciudadanos construyen o transforman instituciones o sistemas para resolver problemas sociales. Implica la creación de nuevos equipos y recursos que mejoren la capacidad de la sociedad para abordar problemas y así, maximizar el impacto social a través de la sustentabilidad y la sostenibilidad. (p. 3)Por este motivo, se debe resaltar la importancia del emprendimiento, porque puede posibilitar el desarrollo humano y económico del país, lo que hace que, la parte social esté muy ligada a estos procesos.
El emprendimiento como proceso integral para el desarrollo
Authors: Díaz Meneses Ana Milena , López Ramírez Camila
Published: June 2023

El presente artículo se basa en la revisión teórica y las opiniones de las autoras frente a los procesos de emprendimiento y de creación de empresa, muy importantes en la sociedad actual, puesto que, a través de ellos se contribuye a la economía y al bienestar social. Hablar de emprendimiento es, referirse a un proceso integral. En este escrito es conveniente abarcar los elementos que hacen posible generar emprendimientos auténticos; es decir, elementos o características de creatividad e innovación; así mismo, es necesario mirar el emprendimiento como un proceso que se da desde diferentes dimensiones, como la individual, familiar y social que, a su vez, permiten reflejar lo esencial de ver la creación de empresas o emprendimientos como procesos cada vez más inclusivos; y, por último, reflejar la importancia que tiene el trabajador social en el medio organizacional y empresarial, como también, hacer evidente una de las técnicas que se convierte en herramienta necesaria para analizar tanto la creación de emprendimientos como el realizar un estudio constante de la empresa: la matriz DOFA, por medio de la cual se incluye aspectos positivos y negativos de la empresa o emprendimiento a trabajar.
Ecoturismo como impulsor de desarrollo en el corregimiento de El Encano
Authors: Genoy Santacruz Érica Silvana , Navarro Portillo Diana Jineth , Preciado Benavides Katherin Johana , Casanova Guerrero Ana Lucía
Published: June 2023

La presente investigación tuvo como objetivo, fomentar el uso y cuidado de los ecosistemas naturales (flora y fauna) del corregimiento de El Encano, municipio de Pasto y, en especial, la Laguna de La Cocha, junto con su Corota. En la metodología se tomó en cuenta el paradigma positivista, el enfoque cuantitativo, el método empírico analítico y el tipo de investigación descriptivo y analítico. Para la población se tomó información suministrada por la Cámara de Comercio de Pasto; para el año 2019 se encontraban registrados 23 establecimiento comerciales en el corregimiento. Para este estudio no se calculó muestra, ya que se hizo censo a la totalidad de lapoblación que se dedica al ofrecimiento de servicios turísticos.
Enhancing Older Adults’ Mobility in Active Living and Tiered Living Communities
Authors:   California State Polytechnic University, Pomona, Zhang Yongping , Kachadoorian Carol ,   Mineta Transportation Institute, Cheng Wen ,   California State Polytechnic University, Pomona, Clay Edward ,   California State Polytechnic University, Pomona
Published: June 2023

The U.S. population is aging rapidly. As people get older, they increasingly face issues such as increased susceptibility to injuries and the need to be assisted with many day-to-day activities. Older adults have the opportunity to opt-in to live in an older adult community (OAC) based on their needs and capabilities. This study comprehensively reviews existing governing development regulations and design criteria related to the older adults’ communities, conducts surveys among people involved with some of these communities in California, and recommends improvements to community design for active living and tiered living communities. This study proposes a new scoring system to evaluate the overall life-space mobility of OACs and the surrounding areas. For each of the ten communities within California, the area's Active Mobility Infrastructure (AMI), both inside and outside, and Permeability (PERM) are assessed. Furthermore, the study aims to comprehend how residents feel about the available facilities and how they are utilized through a survey that includes questions regarding how frequently residents partake in active transportation within and outside their communities and assesses residents’ financial and educational standings. Using Welch’s T-Test, Pearson’s Correlation Coefficient, and a Multinomial Logit Regression model, this study addresses three questions: (1) Are there any statistically significant differences in the transportation connection qualities within and surrounding the older adult communities perceived by their residents? (2) Are there strong correlations between the quality of transport connections and the walking frequency of the residents? (3) What are the main influential factors of walking frequency? The findings from this research can aid transportation professionals in improving the governing development regulations and associated design criteria for better person-environment fit in older living communities.