bluuebunny/crossref_metadata_2025 huggingface dataset:
Post-Plasma-Spraying Gas Nitriding of Some Metallic Coatings on a Fe-Based Superalloy and their High Temperature Corrosion Behavior
Authors: Chawla V.
Published: November 2022

Ti-Al and Al-Cr metallic coatings were deposited on Superfer800H (Fe-based superalloy) through a plasma spray process. Then the gas nitriding of the coatings was done in the lab and the parameters were optimized after conducting several trials on plasma sprayed coated specimens. Characterization and high temperature corrosion behaviour of coatings after exposure to air and molten salt at 900°C were studied under cyclic conditions. Techniques like XRD, SEM/EDAX and EPMA analysis have been used for characterization of the coatings and to analyze the oxide scale. Both the coatings have successfully protected the substrate and were effective in decreasing the corrosion rate when subjected to cyclic oxidation at 900°C for 50 cycles in air and molten salt. The coatings subjected to cyclic oxidation in air have shown relatively high weight gains in the early cycles of the exposure. Uncoated Superfer800H (Fe-based superalloy) showed very poor resistance to hot corrosion in molten salt environment.
Transfer of Wire Arc Sprayed Metal Coatings onto Plastic Parts
Authors: Bobzin K. , Öte M. , Knoch M.A. , Liao X. , Hopmann Ch. , Ochotta P.
Published: November 2022

By means of In-Mold-Metal-Spraying (IMMS), wire arc sprayed metal coatings are transferred onto plastic parts during the injection molding process for the efficient production of metallized plastic parts. One potential field of application of IMMS parts are electrical applications such as electrically conductive tracks or electromagnetic shielding. In the current study, the properties of the transferred coatings, especially the electrical resistivity, are determined. Different feedstock materials are used for the application of the coatings. In the first investigation, pressurized air is used as atomizing gas for wire arc spraying. In contrary to Zn coatings, Cu coatings applied with pressurized air have a significantly higher electrical resistivity in comparison to massive copper. One possible reason for this is the oxidation of the Cu particles during the spraying process. Therefore, N2 and a mixture of N2 and H2 are used as atomizing gas to reduce the oxidation of particles. Consequently, the electrical resistivity of IMMS parts can be significantly reduced. Furthermore, spraying distance, current and pressure of the atomizing gas are varied to investigate the influence of these process parameters on the coating properties.
Low Pressure Warm Spray of Stainless Steel Coatings; Particle Strain Localization Process
Authors: Maev R. , Leshchynsky V. , Strumban E. , Dzhurinskiy D. , Maeva E.
Published: November 2022

Understanding the complex mechanical behavior of stainless steel based composite coatings is important for engineering applications. The focus of this research was on gaining a fundamental understanding of the structure/property relationships that exist during structure formation of the coatings made by new low pressure cold spraying with propellant gas at the temperatures of 800-1000°C (warm spray). While composition is one of the key parameter in determining the final microstructure, the specific warm spray powder shock consolidation parameters (particle velocity and gas temperature) were found to have significant effects on the development of composite structure formation and mechanical properties. Microstructural examination and modeling results revealed that the strain localization mechanism differs from that of adiabatic shear band formation that results in large differences in the ensuing microstructure of the composite coating and its properties.
Deposition Mechanism of Quasi-Columnar YSZ Coatings During Plasma Spray Physical Vapor Deposition
Authors: Gao L. , Ji J. , Lu X. , Zhang D. , Shen J. , Yu Y.
Published: November 2022

As a new processing technology, plasma spray physical vapor deposition (PS-PVD) is capable to deposit coatings out of the vapor phase with high deposition rate. Moreover, the resulting quasi-columnar coatings were unique, hardly deposited by other process. Due to its low thermal conductivity and excellent superior strain tolerance, quasi-columnar coatings attract much attention in the thermal barrier coatings (TBCs) field. In this paper, the morphology variation of the quasi-columnar yttria stabilized zirconia (YSZ) coatings deposited under different conditions was investigated. Combined the morphology of the initial deposits during short time spraying, the deposition mechanism of quasi-column microstructure was concluded. It can be found that the quasi-column coating was formed by co-deposition of vapor phases and solid particles. The vapor phase can develop into column, while the solid particles not only intensified the shadowing effect but also destroyed the nucleus during vapor deposition.
Experimental and Numerical Study of the Influence of Powder Characteristics in the Cold Spraying of Al-based Alloys for Additive Manufacturing Using Low-Pressure, Medium-Pressure and High-Pressure Cold Spray Facilities
Authors: Bunel M. , Borit F. , Delloro F. , Jeandin M. , Bacciochini A. , Lemeille P. , Hervé E. , Meillot E. , Roche K. , Surdon G.
Published: November 2022

Cold spray is continuously expanding for the repair of parts made of aluminum-based alloys. Beyond repair applications, the process is now expected to be exploited efficiently for the additive manufacturing of shaped parts. However, up to now, cold spray is limited to the achievement of rather simple shapes due to a lack of basic knowledge on coating build-up mechanisms to result in dimension-controlled deposition. The objective of this work is to fill that gap through an experimental and modeling study of the coating build-up in cold spray for this specific application. Experimentally, Al-based coatings were deposited for a large range of particle velocity due to the use of low-pressure, medium-pressure and high-pressure cold spray facilities. Particle velocity was monitored as a function of cold spray conditions. Two different types of Al 2024 (Aluminium 2024 Alloy) powders were tested. Coating porosity and microhardness were studied as a function of (both morphological and metallurgical) powder characteristics and spray conditions, primarily in the light of particle velocity. Various correlations could be exhibited. Finite element (FE) simulations of particle impacts were developed, including particle velocity from experimental measurements. These will be used as inputs in an in-house morphological model, the first stages of which could be established successfully.
Influence of Oxidation of Ti Particle During Laser Remelting Process on the Microstructure of Laser Remelted NiTi Coatings
Authors: Wang Y. , Liu J. , Darut G. , Poirier T. , Stella J. , Liao H. , Planche M.-P.
Published: November 2022

Commercial available Ni and Ti powder were blended together and deposited on stainless steel by atmospheric plasma spray(APS). Subsequently the as-sprayed coatings were laser remelted with a Nd -YAG pulsed laser source. Cross-sections of as-sprayed and laser-remelted coatings were characterized by scanning electron microscopy (SEM). Prior to SEM observations, the laser remelted coatings were polished and etched by Kroll etchant. Meanwhile, the energy dispersive spectrometer (EDS) was employed to analyze the chemical distribution of the coating both as-sprayed and laser remelted. The results indicated that APS sprayed NiTi coatings presented a dense microstructure with Ni splats and Ti splats distributing uniformly. Oxygen partial pressure in the argon leads to the burning of Ti splats during the laser remelting process. And Ti oxides located at the bottom of the laser molten pool because of the laser stiffness and molten flow. Moreover, the top part of the molten pool mainly involved in Ni columnar grains.
Corrosion Performance of WC10Co4Cr Coatings on High Strength Steel
Authors: Yang W.
Published: November 2022

300M steel is one of most important aerial materials, which can be used for landing gear and flap & slat track. Some surface engineering technologies are needed to be adopted on its surface, because of its bad corrosion performance. WC10Co4Cr Coatings by high velocity oxygen-fuel spray processing (HVOF) is an environmental friendly method for this protection. In this paper, WC10Co4Cr coatings were prepared on 300M by optimized HVOF processing. And their corrosion performance has been estimated by neutral salt fog test, according with ASTM B117. The results indicate that the porosity gets larger and the hardness gets higher for the dissolution of bonding phases after the test. And for the optimized coatings, there are no corrosion products in the surface and interface between the coating and 300M steel, after 2000 hours ASTM B117 test. So the coatings have a good corrosion performance.
Abrasive Wear Resistance of NiCrBSi Composite Claddings with Different Type of Reinforcement
Authors: Gerasimov A. , Krivopusk V. , Nevezhin S. , Merchev S. , Baldaev S.
Published: November 2022

In this study abrasive wear resistance of NiCrBSi self-fluxing alloys claddings reinforced by tungsten carbide (up to 80 vol.%) and pure tungsten (up to 50 vol.%) was compared. For this purpose, metal matrix composite samples were cladded by diode laser then metallography studies and hardness measurements were provided. Finally, all specimens passed ASTM G65 abrasion test and their wear resistance was compared to alternatives claddings.
Thermal Gradient Cyclic Lifetime of DVC and Lamellar Thermal Barrier Coatings with Equivalent Thermal Insulation Performance
Authors: Cheng B. , Yang G.-J. , Li C.-X. , Li C.-J.
Published: November 2022

Thermal cycle lifetime is essentially important to the application of thermal barrier coatings (TBCs) on the premise of the same thermal resistance. In this study, equivalent thermal insulation conception is introduced to the design of dense vertical crack (DVC) structured TBCs and the lamellar structured TBCs, to fairly compare the lifetime of TBCs with different structure. DVC-structured TBCs with the equivalent thermal insulation to lamellar YSZ TBCs were prepared, and their lifetimes were evaluated by thermal gradient cyclic test. Cross-sectional morphology and phase constitution before and after failure were examined by scanning electron microscope and X-ray diffraction, respectively. The failure mode was analysed. This study would shed light to further coating structure optimization.
Heat Treatment of Cold Spray Copper on the Closure Weld Zone of Used Nuclear Fuel Containers
Authors: Giallonardo J. D. , Poirier D. , Legoux J.-G. , Vo P. , Hoang C. , Doyle D.
Published: November 2022

The Nuclear Waste Management Organization (NWMO) has proposed the concept of a deep geological repository (DGR) for the storage of Canada’s used nuclear fuel. A major engineered component is the used fuel container (UFC) consisting of a steel core coated with copper for corrosion resistance. The copper coating is required to have sufficient ductility and adhesion strength to the steel substrate for loading requirements under DGR conditions. The NWMO has identified two coating technologies for the application process: electrodeposition and cold spray. Electrodeposition is utilized to coat the bulk of the UFC components (i.e., hemi-spherical head and lower assembly). A portion of the hemi-spherical head and the lower assembly openings remain uncoated in order to facilitate the final assembly closure weld process after fuel loading. This area is then cold sprayed with copper to complete the coating on the steel. Since the cold sprayed coating is highly strained in the as-sprayed state, it requires a heat treatment to impart ductility. The ductility is assessed indirectly by measuring the hardness of the material before and after the heat treatment. A recent advancement on this front includes the implementation of an optimized band heat treatment method to prototype UFC’s.
New Expansion of Mobile Particle Shape Imaging and Comparative Measurements with Other Diagnostics
Authors: Franetzky C. , Zimmermann S. , Schein J.
Published: November 2022

Coatings produced by thermal spray processes are determined by particle parameters, which can be investigated using various diagnostic systems. In the first part of the paper the different PSI (Particle Shape Imaging) setup are described. Thereby a summary of former publications, presentation of measurements on different thermal spray processes and suggestions of data error evaluations with special difficulties at the particle investigation are shown. In the second part of the paper the new developed mobile experimental setup of PSI is focused. Four important particle parameters (velocity, size, shape and position) can be measured and evaluated. In this part the results and test of new different illumination sources, optical configurations and trigger units are discussed. Furthermore interesting ideas of picture processing and data evaluation are depicted and explained in more detail. First comparison of the results measured with DPV2000, SprayWatch and additional Voltage-Current-High-Speed- Camera investigations are shown. The complete paper concludes with an outlook for future combination of further established diagnostic systems (i.e. find the optimal distance between substrate and thermal spray system).
Study on Thermal Shock Performance of Dense Vertically Cracked Thermal Barrier Coatings
Authors: Lu X. , Ji X. , Yu Y. , Shen J.
Published: November 2022

The ZrO2-7%Y2O3 powder produced by domestic company was used to make dense vertically cracked (DVC) thermal barrier coatings (TBCs) via the High energy plasma spray system. The influence of preheating temperature of substrates, the thickness of single deposition and spray power on the microstructure of the coatings was studied in detail. The porosity of the thermal barrier coatings prepared by Delta gun was 2.8%-7.3% and bonding strength of the coatings was 20-30MPa. The results demonstrated that the TBCs with DVC structure had excellent thermal shock resistance, and the 1100°C thermal shock lifetime was 206 cycles, which was obviously better than different coating structure by conventional APS (life less than 100 cycles). The mechanism of the failure of the TBCs in the thermal shock process was investigated.
Examination of Lamellar Pores Under Thermally Sprayed Splats Using White Light Interferometry
Authors: Chen L. , Zhang Y.-M. , Yang G.-J. , Li C.-X. , Li C.-J.
Published: November 2022

In the present study, a novel and practical method, white light interference, was proposed to characterize the lamellar pores covered by thermally sprayed YSZ and LZ splats. In this method, only an ordinary optical microscopy (OM) was employed. Colorful Newton rings and parabolic shapes of the lamellar pores were widely observed by OM. The crack spacing and the shapes of the lamellar pores captured by OM were well consistent with those by scanning electron microscopy (SEM) and focus ion beam (FIB). Besides, mechanical analyses were carried out and the results were well consistent with those by OM. Most importantly, the essential fact that the lamellar pores resulted from transverse cracking/delamination in thermal sprayings was highly elaborated.
HVAF-Sprayed Bi-Layer Coatings: Effect of Microstructure and Chemical Composition of the Intermediate Layer on Corrosion Behavior
Authors: Sadeghimeresht E. , Markocsan N. , Nylén P.
Published: November 2022

In a variety of engineering applications, components are exposed to corrosive/erosive environment. Protective coatings are essential to improve the functional performances and/or extend the lifetime of the components. Thermal spraying as a cost-effective coating deposition technique offers high flexibility in coatings’ chemistry/morphology/microstructure design. However, the pores formed during spraying inherently restrict the use of coatings for corrosion protection. In view of the above gap to have a high quality coating, bi-layer coatings have been developed to boost the corrosion performance of the coatings. In a bi-layer coating, an intermediate layer is deposited on the substrate before spraying the coating. The electrochemical behavior of each layer is critical to ensure a good corrosion protection. The corrosion behavior of the layers strongly depends on coating composition and microstructure, which are affected by feedstock material and spraying process. In the present work, Cr3C2-NiCr top layer with different intermediate layers (i. e., Fe-, and Ni-based) were sprayed by high-velocity air fuel (HVAF) process. Microstructure analysis, as well as electrochemical tests, e.g., open-circuit potential (OCP) and polarization were performed. The results showed a direct link between the OCP of each layer in a bi-layer coating and corrosion mechanisms. It was found that the higher corrosion resistance of Ni-based intermediate layers than Fe-based coatings was due to higher OCP of the coating in the galvanic couple with top layers. Splat boundaries and interconnected pores reduced the corrosion resistance of the intermediate layers, however a sufficient reservoir of protective scale-forming elements (such as Cr or Al) improved the corrosion behavior.
KCl-Induced Corrosion Behavior of HVAF-Sprayed Ni-Based Coatings in Ambient Air
Authors: Jafari R. , Sadeghimeresht E. , Shahrabi Farahani T. , Markocsan N. , Joshi S.
Published: November 2022

It is well known that the presence of KCl deposited on superheater tubes in biomass- and waste-fired boilers leads to a severe corrosion and premature damage. In order to protect such critical components which are routinely exposed to aggressive environments, thermal sprayings are frequently proposed as a potential solution. By virtue of the techno-commercial benefits that provides as a direct outcome of its ability to cost-effectively deposit coatings virtually free of porosity and in situ formed oxides, the high velocity air-fuel (HVAF) process offers a particularly attractive approach. In the present work, the influence of KCl on the oxidation behavior of four HVAF-sprayed Ni-based coatings (Ni21Cr, Ni5Al, Ni21Cr7Al1Y, and Ni21Cr9Mo) has been investigated. The coatings were deposited onto specimens of 16Mo3 steel, a widely used boiler tube material. High temperature corrosion tests were carried out in ambient air at 600°C, with 0.1 mg/cm2 KCl being sprayed onto the samples prior to the exposure. Uncoated substrates and an identical test environment without KCl were used as reference. SEM/EDS and XRD techniques were utilized to characterize the as-sprayed and exposed samples. The results showed that the small addition of KCl significantly accelerated damage to the coatings. It was further revealed that the alumina-forming NiAl coating was capable of forming a more protective oxide scale compared to other chromia and mixed-oxide scale forming coatings. In general, the oxidation resistance of the coatings based on the kinetic studies had the following ranking (from the best to the worst): NiAl >NiCr> NiCrAlY> NiCrMo.
Research on Abradability of Different Abradables Rubbed Against Ti2AlNb Blades
Authors: Cheng X. , Liu J. , Yu Y. , Liu T. , Zhang D. , Shen J.
Published: November 2022

The Ti2AlNb blade is used in high pressure compressor aero-engines to provide high thrust force at relatively light weight. A series of abradability tests was carried out on CuAlNi-graphite, NiCrAl-graphite, NiCrAl-bentonite, and NiCrFeAl-hBN abradable coatings rubbed against Ti2AlNb dummy blades with the maximum blade-tip velocity of 300 m/s at 500 °C. In consideration of the effects of an engine’s working conditions, some tests were conducted with incursion rate as the single variable. The scratched surfaces of the samples were observed by the stereoscopic optical camera, and a ratio of the blade wear to shroud incursion depth (IDR) was evaluated to characterize the abradability of coatings. The results show that NiCrAl-graphite and NiCrFeAl-hBN abradable coatings perform very well rubbed against the Ti2AlNb blade, and the blade-tip wear is not obvious after abradability tests.
Effect of Mo Content on Tribological Properties of Atmospheric Plasma-Sprayed Mo-NiCrBSi Composite Coatings Under Dry and Oil-Lubricated Conditions
Authors: Xu H. F. , Liu L. M. , Xiao J. K. , Zhang C. , Zhang G. , Liao H.
Published: November 2022

NiCrBSi is a material generally used in wear-resistant coatings. In order to improve the tribological properties of atmospheric plasma-sprayed NiCrBSi coatings, Molybdenum (Mo) was incorporated into the NiCrBSi coatings to reduce the friction coefficient and wear rate under dry and oil-lubricated conditions. In this paper, Mo-NiCrBSi composite coatings with Mo content of 5, 10, 20 and 30 wt.% were deposited on stainless steel substrates respectively by atmospheric plasma spray. X-ray diffraction, optical microscopy and scanning electron microscopy equipped with energy dispersive spectroscopy were utilized to investigate the phase structure and surface morphology of the composite coatings. Reciprocating friction tests were conducted to measure the friction coefficients and 3D optical microscopy was used to depict the wear track profiles. The results showed that the 30 wt.% Mo-NiCrBSi coating exhibits the best tribological performance. In addition, MoO2 and MoS2 films were formed in the friction process under dry condition and oil-lubricated condition respectively.
Direct Metal Laser Sintering (DMLS) Technique for Prospective Wear Related Applications
Authors: Grewal G. , Kaushal G. , Krishan B.
Published: November 2022

Direct Metal Laser Sintering (DMLS) technique is one of the technologies which is generally used to built prototypes and tooling applications. DMLS uses powder bed fusion to bond particles together by laser energy. A new powder layer is spread on top of the previous layers and the process is repeated up to required shape of part can be produced. This review paper presents development, current status and challenges of the DMLS technique with emphasises on material processed by DMLS and is aimed to understand influence of density, microstructure, micro-hardness, tensile strength and wear behaviour of built-up parts. It also highlights the process through proofs based on classical results in terms of advantages and applications.
A Novel Way to Analyze the Residual Strain and Stress in Cold-Sprayed Coatings
Authors: Ye Y. , Huang R. , Huang J. , Fukanuma H. , Shobu T.
Published: November 2022

Residual stress and adhesive/cohesive strength in cold-sprayed coatings are extremely important factors, and the balance between them can be a determining factor in coating failure, such as by delamination or cracking. Dominated residual stress to bonding stress should lead to coating peel off from its substrate. Up to now, it is still difficult to measure the residual stress of cold-sprayed coating especially inside it. In the present study, a high-energy X-rayed beam was utilized to penetrate the cold-sprayed coatings and the change of its diffraction angle can be detected. This gave a way to measure the residual strain inside the cold-sprayed coatings. With the scanning of the X-rayed beam and the detector at different locations, the strain of cold-sprayed coating at 2 directions can be obtained. Moreover, the residual stress of cold-sprayed coating can be calculated with the measured strain.
Submodeling of Alumina Coatings by APS
Authors: Martínez García V. , Gadow R. , Killinger A. , Moreno Nicolás J. A.
Published: November 2022

Traditional low-cost bulk materials are unable to fulfil the increasing requirements of actual technology and functional coatings – e.g. APS alumina coatings on aluminium substrates for tribological properties – are a suitable alternative. The development of new thermal sprayings is usually based in experimental procedures which involve long development times and high costs. Nowadays, numerical simulation allows the researcher a better understanding of thermal spray processes as well as reducing the time and cost for the optimization of processes, but it requires a deep insight into the physics of the phenomenon. The submodelling approach allows the researchers to work with a local model, a thin layer – just a few microns – on the metal substrate surface, and more realistic boundary conditions, which requires a little specialised knowledge. The current study involves the workflow to manage the modelling at piece scale, and the transfer and interpolation of boundary conditions in each scale. The coating is divided into several layers, which represent the successive splats deposited during the process, and the heat flow from the torch is modelled by radiation and convection. A code is implemented in order to generate the routine needed by the FEM software, in which the results are processed and interpolated for the subsequent submodel. Furthermore, the material plasticity is considered and several tests are performed in order to check the simulation results.
Investigating Influences of Suspension Plasma Spray Parameters on Photocatalytic Activity of TiO2 Coatings
Authors: Vu T. P. , Otto N. , Vogel A. , Kern F. , Killinger A. , Gadow R.
Published: November 2022

In recent studies, the suspension plasma spray technology (SPS) was shown as a promising method for deposition of photocatalytic TiO2 coatings on glass substrates. However, only little information about the effects of SPS process parameters on the resulting photocatalytic activity is available. In this study, several suspensions were prepared from different powders and various dispersion mediums successively sprayed. Four titania powders with a proven photocatalytic track record, Evonik P25, Kronoclean 7050, Hombicat UV100 and Sigma Aldrich were used to study the influence of starting powder type. Furthermore, compositions of the dispersing medium were varied in order to investigate their influence on coating structure, adhesion to substrate and photocatalytic activity. Degradation of methylene blue was tested as a marker for the photocatalytic activity. At chosen torch parameters, alcohol and water in a ratio of 1:3 was identified as the best composition. Suspensions sprayed with higher alcohol content suffered from the reduction in anatase phase; higher water content reduced the coating adhesion to the substrate. Regarding the initial powders, films made of Evonik P25 and Sigma Aldrich TiO2 had higher photocatalytic activity than others. Moreover, the photocatalytic activity of doped TiO2 coatings illuminated by both an artificial light and sunlight were investigated.
Pulsed Current and Pulsed Powder Operation of the One-Cathode-One-Anode-Plasma-Generator (OCOAPG)
Authors: Zimmermann S. , Atzberger A. , Szulc M. , Zierhut J.
Published: November 2022

In most plasma spraying SMEs a One-Cathode-One-Anode-Plasma-Generator (OCOAPG) is used due to its cost-effectiveness. To achieve high deposition rates, the highest possible fraction of the injected powder has to be melted and accelerated towards the substrate. Adequate to the amount and size of the particles, a sufficiently long and reproducible residence time in plasma is therefore needed. This can be achieved by a long plasma jet with little or no temporal variation in length and temperature. In OCOAPG an arc is operated between a cathode and a central tubular anode, which causes different instabilities in the effluent plasma jet. Due to the instable interaction between the plasma jet and the carrier gas jet continuously incorporating the powder, fluctuations occur resulting in reduced coating quality. Coating systems with a higher amount of electrodes (and hence using several arcs) show higher stability and therefore can provide higher coating quality. However, due to their complexity and cost intensity, the investment hurdle for SMEs usually turns out to be too high. Recently, research steps to improve the plasma spraying process with OCOAPG have been undertaken by using a controllable current source to create a uniform particle gas jet interaction. As the movement of the anodic arc attachment point can be actively controlled by current pulses, the plasma jet can be lengthened and shortened at periodic intervals. Furthermore, by pulsing the particle delivery synchronously to the power modulation an improved particle penetration and consistent residence times can be achieved. First diagnostic results, including coatings, are presented and discussed within the paper.
Peculiarities of Using Innovation Pedagogical Technologies in the Professional Training of Future Specialists of Service Sector
Authors: Lukashevych Yuliia
Published: November 2022

The article deals with the importance and advantage of using innovation pedagogical technologies in professional preparation of future specialists of service sector that provides the development of professional, creative competencies and stimulates the future specialists’ need in self-education. It is emphasized that, thanks to the use of innovative technologies, the forms of modern lectures and practical classes are expanded and diversified: the quality of presentation of the material and efficiency of its assimilation are improved, the skills of informational and communicative interaction are formed, the worldview of students expands, and motivation for the chosen profession increases. The purpose of the article is to define the specific features of the application of innovative pedagogical technologies in the professional training of future specialists of the service sector in higher education institutions. The following methods have been used in the research as analysis, synthesis, systematization of the psychological and pedagogical literature, generalization. Results. The scientific and pedagogical analysis of literatures has allowed the author to specify the following peculiarities of innovation pedagogical technologies: 1) the personality of a teacher or an organizer of the educational process is leading, but this changes its position in relation to the student and to himself/herself; 2) the teacher appears not only as a carrier of knowledge and information, norms and traditions, but contributes of formation and development of student’s personality. The research results may contribute to optimization and improvements of teaching in the establishments of higher education by means of innovation pedagogical technologies.
Conclusion. Among a wide range of innovation pedagogical technologies of the most significant for preparation of future service sector specialist are personally-oriented technologies, technologies of project and problem teaching, information-communicative, interactive technologies. The study of professional disciplines with using of problem style of learning of teaching material, conducting independent researches, the result of which is creation of training projects on actual themes, allow to increase cognitive interest, induce of students as future service sector specialists to active acquisition of professional knowledge, skills, develop mental abilities, creation of strong base for deep professional preparation of future service sector specialists.
EXTRACURRICULAR WORK IN MATHEMATICS AS A COMPONENT OF THE PROFESSIONAL AND PEDAGOGICAL ACTIVITY OF A MATHEMATICS TEACHER
Authors:   Київська державна академія декоративно-прикладного мистецтва і дизайну імені Михайла Бойчука, PASKO O. , BONDARENKO N. ,   Школа І-ІІІ ступенів № 275 імені Кравчука Володимира Деснянського району міста Києва
Published: November 2022

The article is devoted to the theoretical aspect of the concept of «extracurricular work» as a component of the professional and pedagogical activity of a mathematics teacher. The content of the concept of «extracurricular work» is analyzed, an analysis of the content of tasks and functions of extracurricular work in mathematics is presented. The importance, necessity and expediency of extracurricular work in mathematics have been clarified. The methodical features of extracurricular work, which must be taken into account by the teacher when organizing and conducting classes with students of general educational institutions for the formation and development of the creative potential of schoolchildren, the development of important abilities and skills of search, research activity, independent acquisition of the necessary knowledge, are highlighted and described. Extracurricular work in mathematics is an important component of the educational process in general and teaching mathematics in particular. A well-organized preparation by the teacher for carrying out such work awakens and develops students' interest in mathematics. Thanks to extracurricular work, schoolchildren learn to independently find non-standard ways of solving mathematical problems. Extracurricular work is an effective tool that stimulates students to seek knowledge, contributes to the fuller satisfaction of their interests, guarantees success and equips them with elements of self-knowledge. Extracurricular work in mathematics allows you to consider issues that go beyond the scope of the official curriculum, which contributes to the formation of mathematical culture in students. This work is very diverse in terms of types and content, has a touch of curiosity, and creates interest in the subject. The specificity of extracurricular work requires appropriate professional and personal qualities of the teacher, an individual style of thinking aimed at creatively searching for original solutions, and developing mathematical abilities of schoolchildren during extracurricular hours. Accordingly, this requires the mathematics teacher to be ready for constant creativity, modeling and designing extracurricular work in the mathematics education system, taking into account the individual characteristics of students, their educational needs, motives, inclinations and interests. Key words: mathematics, extracurricular work of a mathematics teacher, content, tasks, functions of extracurricular work, pedagogical activity, creative abilities.
PARK ECOSYSTEM SERVICES AND THEIR EVALUATION
Authors: VERNIHOROVA N. V.
Published: November 2022

Topicality. Improving the urban landscaping system requires an understanding of the needs of the green economy, as well as the functionality of park ecosystems and prospects for their application. Therefore, it is important to study the ecosystem services of parks and determine their beneficial effects on the socio-economic space of the city. An important component of this problem is the improvement of park assessment methods, which will cover the assessed parameters more widely.Aim and tasks. The purpose of the article is to determine the benefits of different groups of park ecosystem services, as well as to provide proposals for calculating indicators of functional assessments of park ecosystems, and financial indicators of the green economy. The task is to analyze and summarize the existing approaches to the assessment of ecosystems, to determine the main problem of integrated assessment of ecosystem services of parks.Research results. The effectiveness of measures to improve and develop urban parks largely depends on understanding the functionality of ecosystems and the ability to find their application in accordance with the needs of the city and its inhabitants. Existing methods of assessing parks are less concerned with ecosystems, although they are a resource for creating cultural and recreational assets. Assessment of ecosystem services mainly concerns large natural ecosystems (seas, forests, wetlands). Parks are approached mainly as architectural complexes. However, the assessment of ecosystem services is quite complex, and in the field of park management little studied, which is the impetus for a new approach to the assessment of parks.To see the general situation of the development of the park object, or the landscaping system of the city as a whole, a comprehensive approach is important - the assessment of economic and natural parameters. Assessment of ecosystem services can sometimes provide unexpected results that clearly show the dependence of urban agglomerations on the surrounding natural ecosystems, and increase the value of natural centers in the city.Conclusion. The proposed calculations are intended to facilitate the visual presentation of the parameters of financial support of the park economy, providing the city with park facilities, as well as the functional capabilities of existing green spaces. Most estimates are based on field research or statistics, so it can be noted that in addition to methodological developments, it is necessary to improve the system of monitoring and accounting of parks. This is especially true of the ability to assess ecosystem services.
Keterampilan Menulis Teks Berita Menggunakan Metode Discovery Learning
Authors: Linda Wirda
Published: November 2022

This study aims to determine the effect of discovery learning method on writing news text skills. The research method used is an experimental research method with discovery learning approach. The results showed that the mean value of the experimental class was 83.78 with a standard deviation of 16.74 which were well qualified. Whereas in the control class the average value is 69.82 with a standard deviation of 15.87, which is more than adequate. The bivariate test results showed that the value of Ftable 3,4> Fcount 1.1095 and the analysis results obtained Tcount 3.061 and Ttable 1.68. The average score of the experimental class writing ability is higher than the control class. In conclusion, there is a significant effect of the use of the discovery learning method on the skills of writing news texts in class VIII students of SMP Negeri 4 Lareh Sago Halaban.

Keywords: Discovery Learning Method, News Text Writing
Kesalahan Penggunaan EYD terhadap Paragraf Eksposisi
Authors: Ernis Poni
Published: November 2022

The purpose of this study is to analyze the use of EYD in the exposition paragraph. This type of research is qualitative research using descriptive methods. Based on the results of the study, the errors in using EYD for exposition paragraphs are grouped into three parts, namely capital letters, preposition and punctuation. Writing capital letters results in 279 cases of error, the use of prepositions of data results in 24 cases of errors, while the use of punctuation is further divided into the use of a period (.) And the use of a comma (,), the use of a period of data results in 26 cases of errors, while the use of commas obtained data results as many as 36 cases of errors. Thus it can be concluded that the misuse of EYD was caused by students' lack of understanding of the writing procedure according to the EYD system.

Keywords: Exposition Text, EYD Usage Error
Struktur Batin Puisi Bertema Cinta Karya W.S. Rendra dan Ardiansyah
Authors: Ansyor Ansyor , Nugroho Agung
Published: November 2022

The purpose of this study was to analyze the love-themed poetry of W. S. Rendra and Ardiansyah. The research method used is a qualitative method based on content analysis. The results of this study indicate that the elements that stand out in the concept of aesthetic development in the love-themed inner structure poetry. Poets are free to play words in order to beautify the poetry of poetry. The inner structure used is the inner structure of the theme, taste, tone and message. In conclusion, the four love-themed poems by W.S. Rendra and Ardiansyah have 52 quotes, including: 15 quotes containing concern and heartbreak, 14 quotes, while the tone and message are 13 and 10 quotes.

Keywords: Rhymes Inner Structure
Analisis Kepribadian Tokoh Utama dalam Novel Neraka Dunia Karya Nur Sutan Iskandar
Authors: Nurcahyo Alfi , Arianti Rita , Hermawan Hermawan
Published: November 2022

The purpose of this study was to describe the main character in the novel Hell of the World by Sutan Nur Iskandar. This research method is descriptive with the type of qualitative research. The results show that the dominant main character has a personality that is influenced by the Id element, this is because the main character Ahmad Salam instinctively determines his personality to have a strong stance, not easily influenced by others and has an independent spirit in life. No. Id plays a more important role in every action and behavior that the main character takes because these actions come from the impulse of desire in himself without being influenced by others. In conclusion, the personality elements of the characters contained in the novel Hell of the World by Sutan Nur Iskandar are of 3 types, namely, 1) the id element contains eleven data, 2) the ego element contains ten data, 3) the super ego element contains eight data.

Keywords: World Hell, Novel, Personality Uncertainty
Analisis Citraan dalam Antologi Puisi Titip Pesan pada Tuhan Karya Lenggok Media Production Rokan Hulu
Authors: Badri Impon , Nofrita Misra , Hermawan Hermawan
Published: November 2022

The purpose of this study was to describe the imagery contained in the anthology of the poem Titip Message to God by Lenggok Media Production Rokan Hulu. This research method is a qualitative descriptive method. The results of this study were to find 179 images in the anthology of the poem Titip Message Pada God with Lenggok Media Production Rokan Hulu, namely 80 visual images, 45 auditory images, 15 olfactory images, 6 tasting images, 17 tactile images, and 16 motion images. In conclusion, in this poetry anthology visual imagery is more dominant because poetry is more poetry than dark poetry, so that poetry words tend to use denotative language to describe the objects they see and most of the poets adhere to naturalism by describing what is according to their vision. 

Keywords: Imagery, Leggok, Poetry
Kemampuan Menghubungkan Latar Cerpen dengan Realitas Sosial Menggunakan Model Pembelajaran Cooperative Integrated Reading and Composition (circ)
Authors: Putri Mawar Lestari
Published: November 2022

Penelitian ini bertujuan untuk  mendeskripsikan kemampuan siswa kelas VII SMP Negeri B. Srikaton menghubungkan latar cerpen dengan realitas sosial setelah penerapan model pembelajaran Cooperative Integrated Reading and Composition (CIRC). Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Sedangkan subjek dalam penelitian ini adalah siswa kelas VII.7 SMP Negeri B. Srikaton berjumlah 35 siswa yang terdiri dari 17 laki-laki dan 18 perempuan. Teknik pengumpulan data yang digunakan adalah observasi, tes, dan angket. Teknik analisis data yang digunakan adalah teknik analisis hasil observasi, teknik analisis hasil tes, dan teknik analisis hasil angket. Hasil penelitian menunjukkan beberapa hal, yaitu (a) proses penerapan model pembelajaran CIRC dalam pembelajaran menghubungkan latar cerpen dengan realitas sosial tercapai dengan baik ditunjukkan bahwa kegiatan pembelajaran dengan model pembelajaran CIRC dalam pembelajaran menghubungkan latar cerpen dengan realitas sosial dari awal kegiatan inti hingga kegiatan akhir berjalan sesuai dengan rencana kegiatan pembelajaran serta mampu mengidentifikasi siswa dalam proses pembelajaran. (b) kemampuan menghubungkan latar cerpen dengan realitas sosial siswa berdasarkan hasil tes menunjukkan rata-rata 75,14 dengan ketuntasan mencapai 80%. (c) respons siswa terhadap penggunaan model pembelajaran CIRC dalam pembelajaran menghubungkan latar cerpen dengan realitas sosial baik, hal tersebut dapat dilihat dari hasil persentase jawaban responden (siswa sampel)

 

 

Kata kunci: model pembelajaran CIRC, latar cerpen, realitas sosial
Quantities Over Qualities
Authors: Christmas Amy
Published: November 2022

In a society suffused with surveillance technologies and practices, which persist in their extension across and into all dimensions of human experience, members of the contemporary art community have made significant contributions to the ontology of the surveillant self. This article compares recent works by several prominent multimedia artists who have explored the radical potential of dataveillance as a way to bridge the disconnect between quantitative (metric) and qualitative (narrative) representations of self in the Information Age. By considering the questions raised by three recent art projects—Hasan Elahi’s Tracking Transience; Jill Magid’s Composite; Heather Dewey-Hagborg’s Stranger Visions—I explore how each artist employs a surveillant aesthetic to test the extent to which meaningful subjectivities may be constructed out of decontextualized metric data. In this way, these artists are directly engaging with the surveillant assemblage, harnessing the discrete flows of data that normally work to depersonalize and thereby negate individual identities, and instead repurposing these disassembled metrics as a means of examining modern selfhood as it both produces and is produced by surveillance environments. In particular, this article focuses on the tension between metric and narrative representations of self, by drawing on multimedia artistic projects that engage with and combine both aspects and document their efforts in a range of visual and textual media.
Cyborgian Salariats
Authors: Bender Stephanie
Published: November 2022

This article examines Sasha’s Stone’s photographic constructions of the salaried worker, or die Angestellten, within the rationalized Weimar office as published in his 1926 photo essay “Das 100-Pferdige Büro—keine Utopie” (The hundred-horsepower office—no utopia). I analyze his images of the modern office and the white-collar employee as participating in the public discourse regarding the highly debated phenomenon of rationalization, presenting the Angestellter as a tool of rationalization rather than an individual, creating automata-like employees that fit with the broader trend of depicting such employees as what Matthew Biro describes as cyborgs, or human-machine hybrids. I assert that Stone’s essay performs a dialectic role in relation to other, distinct versions of the same photographs, suggesting that technology within the sphere of the modern office, while inevitable and necessary, is possible only through the subjugation of the individual humanity of those at work by such technology.
Relationship between Family Support and Elderly Independence in Fulfilling Daily Activities
Authors: Mayasari Ayu Citra , Rochmah Lailatul , Syadiyah Hidayatus , Kirana Sukma Ayu Candra , Mutyah Diyan , Poddar Sandeep
Published: November 2022

The process of decreasing physical, psychological, and social conditions that interact with each other and cause dependence on others is called the aging process. The aging process can cause problems both physically, biologically, mentally, and socioeconomically. Decreased physical ability can cause disruption in the fulfillment of daily activities that require the support of others or family. Family support is a form of interpersonal relationship that requires very strong family ties to help the elderly face problems as proof that the family is the closest person to the elderly. The purpose of this literature review is to determine the relationship between family support and the independence of the elderly in fulfilling their daily activities. This study has been reviewed from 16 articles, consisting of 8 national journals and 8 international journals, to determine the relationship between family support and the independence of the elderly in daily activities. The journal examined showed the results of a very significant relationship between family support and the independence of the elderly in meeting the needs of daily activities.
A Rare Case of Chest Pain in Children
Authors: Osman Nurul Liyana , Harvendhar Singh Gurjeet Singh
Published: November 2022

The presentation of a paediatric patient with shortness of breath can be a common occurrence in the pediatric population presenting to the emergency departments with the majority of the illnesses in paediatric population can be attributed to shortness of breath. Recognition of life-threatening illnesses in a pediatric patient presenting to the emergency can be a challenge and thus having a low threshold of suspicion. Early recognition and treatment can be crucial and life-saving with the involvement of the right teams and the appropriate disposition of patients. In this case, we share a rare cause of shortness of breath in a child presenting to the emergency department.