bluuebunny/crossref_metadata_2025 huggingface dataset:
HVOF Facility Qualification at an Airline – Importance and Benefits for Landing Gear Applications
Authors: Randolph J.
Published: October 2022

A commercial air carrier has replaced the chrome plating on line-of-sight landing gear installed on several aircraft with HVOF sprayed WC-Co-Cr coatings. Pending the results of ongoing testing and service evaluations, the carrier plans to switch to HVOF coatings on all line-of-site landing gear and possibly other structural and engine components. This paper discusses the infrastructure that will be necessary to build, qualify, and maintain a high-velocity oxyfuel spraying facility that will serve one of the largest fleets of aircraft in the world. Paper includes a German-language abstract.
Low Cost Industrial Type Diagnostic System for Powder Jet Visualisation, Particle-Substrate Interaction and Coating Growth
Authors: Bertrand P. , Smurov I. , Ignatiev M.
Published: October 2022

This work evaluates the capabilities of a digital camera selected for use in a thermal spray diagnostic system. The CCD-based image sensor, a Sony Exview HAD, was tested in an industrial plasma-spraying process and is assessed in terms of the information it provides about the plasma jet, particle-substrate interactions, and coating growth. Zirconium dioxide and aluminum oxide ceramics are examined as typical powder systems. Paper includes a German-language abstract.
Prozessdiagnostik an thermischen Beschichtungsverfahren – Neue Erkenntnisse aus den laufenden Arbeiten der DFG-geförderten Forschungsgruppe (Process Diagnostics at Thermal Spraying Processes – New Experiences from Current Projects of the DFG-Sponsored Research Groups)
Authors: Bach Fr.-W. , Henne R. , Borck V. , Landes K. , Streibl T. , Lugscheider E. , Fischer A. , Seemann K. , Copitzky T. , Prehm J.
Published: October 2022

This paper presents research highlights obtained over the past three years in the course of a DFG-funded project on new and emerging diagnostic methods for thermal coating. It describes the tools and techniques used, the particle and substrate variables monitored, the accuracy of each measurement, and various associations with coating properties. Paper text in German.
Vacuum Plasma Sprayed YSZ Electrolyte for Solid Oxide Fuel Cell Application
Authors: Ma X.Q. , Borit F. , Guipont V. , Jeandin M.
Published: October 2022

This work assesses the properties of vacuum plasma sprayed YSZ coatings for potential use in solid oxide fuel cells. The results of the investigation show that low-porosity layers of yttria-stabilized zirconia can be produced by using a fine powder and by adjusting plasma gas composition. Under optimized spraying conditions, YSZ layers with a thickness of 10-20 μm, a porosity less than 1%, and an average roughness of 1 μm are achievable. Paper includes a German-language abstract.
Erosion Behavior of WCP-Fe3Al Composite Coating Produced by High Velocity Arc Spray at Elevated Temperature
Authors: Binshi X. , Shining M. , Baohong T. , Xiubing L.
Published: October 2022

In this paper, a coated wire is developed and used to produce iron aluminide-WC intermetallic matrix composite (IMC) layers via arc spraying. The microstructure and phases of the deposits are examined, showing that the main phase of the wire-sprayed layer consists of iron aluminide and the reinforcement phase consists of WC, W2C, and alpha-aluminum oxide. The erosion-corrosion behavior of the FeAl-WC layer is determined at different particle beam angles and temperatures and is compared with that of 1018 steel. Paper includes a German-language abstract.
Thermal Spray Moulding – Production of Microcomponents
Authors: Wilden J. , Schnick T. , Wank A.
Published: October 2022

This work investigates the use of thermal spray molding in the production of microscale components with large aspect ratios. It evaluates a number of spraying processes and coating materials and discusses the impact of the base material on process control and product properties. It also demonstrates the use of simulation for determining optimal process conditions. Paper includes a German-language abstract.
Internal Plasma Spraying for New Generation of Automotive Engine
Authors: Barbezat G.
Published: October 2022

Different thermal spray processes are being used to provide coatings for cylinder bores in automotive engines. The internal plasma spraying technology described in this paper applies protective layers to cylinder surfaces in engine blocks made of AlSi cast alloys. This method enables a significant reduction in the coefficient of friction, a reduction in oil consumption, and an increase in wear resistance compared to cast iron, the standard material for cylinder liners. Paper includes a German-language abstract.
Mobiles Plasma-Pulver-Handauftragschweißen: Erfahrungen aus der Praxis (Mobile Plasma Powder Manual Overlay Welding: Practical Experience)
Authors: Schreiber F.
Published: October 2022

This paper discusses some of the recent improvements in plasma powder surface build-up welding technology and provides examples of its use in different areas of industry. It describes the coating properties achievable with newly developed filler alloys and how they compare with conventional hardcoats. It also discusses the growing use of manual overlay PTA welding among small and midsize companies and the factors behind it. Paper text in German.
Plasma Transferred Arc Overlays Reduce Operating Costs in Oil Sand Processing
Authors: Harper D. , Gill M. , Hart K.W.D. , Anderson M.
Published: October 2022

Plasma transferred arc spraying of tungsten carbide coatings can significantly increase the service life of machines and components subject to wear. This paper assesses the effect of such coatings in oil sand processing equipment. It describes the development and testing of the layers used and explains that the extraction and processing of oil sands necessitate continuous testing and ongoing improvement in both materials and processing techniques. Paper includes a German-language abstract.
Simulation of Coating Profile Under Plasma Spraying Conditions
Authors: Hurevich V. , Gusarov A. , Smurov I.
Published: October 2022

One of the key aspects of particle behavior in the plasma jet is the stochastic nature of the injection process. Particles are injected into the plasma jet with a certain variation in initial velocity which, along with their size distribution, determines the form of the layer structure and the degree of melting. The aim of this work is to model the influence of the initial spray parameters on the main characteristics of spray particles, such as temperature, velocity, and degree of melting, during impact with the substrate. A one-dimensional heat conduction equation that accounts for phase transitions is solved numerically for spherical particle shapes. The dynamic particle problem is also solved and an integral criterion for the coating model is obtained. Paper includes a German-language abstract.
Progress in the Area of Low Pressure Plasma Spraying
Authors: Loch M. , Barbezat G. , Meyer P.
Published: October 2022

This paper discusses the advantages of low-pressure plasma spraying along with recent improvements in LPPS technology. It also reviews current and emerging applications and examines the microstructure of different coating materials deposited using low-pressure plasma spraying techniques. Paper includes a German-language abstract.
Analytical Characterization of Various Titanium Nitride Based Coatings Obtained by Reactive Plasma Spraying
Authors: Tului M. , Borgia C. , Casadei F. , Severini E. , Valente T.
Published: October 2022

In this investigation, titanium layers with different titanium nitride phases are deposited via reactive gas plasma spraying using a statistical design-of-experiments approach to determine the effect of process parameters on coating properties. The layers are characterized by various means, showing how nitrogen concentration in the plasma gas, spraying pressure, and substrate temperature correspond with coating hardness, porosity, and nitriding levels. The values of all layer properties were found to increase with increasing nitrogen content in either the plasma gas or spraying atmosphere. Paper includes a German-language abstract.
Optimization of Metallographic Preparation for Thermally Sprayed Coatings using the Taguchi Method
Authors: Kharlanova E. , Grigore I.
Published: October 2022

A systematic study of sample preparation methods tailored to different types of thermal spray coatings was recently conducted. This paper presents the results of investigations on polishing methods and materials and their effect on the quality of cuts. The results show that the type of polishing cloth used has a major influence on layer breakouts, while the direction of rotation and embedding medium have relatively little effect. Paper includes a German-language abstract.
Role of Spray System and Powder Feedstock on the Sliding Wear Behaviour of WC-Co HVOF Sprayed Coatings
Authors: Sudaprasert T. , McCartney D.G. , Shipway P.H.
Published: October 2022

This paper examines the effect of spraying conditions and WC grain size on the wear behavior of WC-Co coatings. Two powders, one with a fine grain fraction and one with a more conventional grain fraction, were applied using liquid and gas HVOF systems. All coatings were subjected to sliding wear tests against an aluminum oxide ball. A sintered WC-Co composite was also tested for comparison. The sintered composite structure (cermet) exhibited the highest wear resistance, while the conventional powder sprayed by means of a gas-operated burner produced the best coating. Paper includes a German-language abstract.
Warm Spray: A New Promising Technology of the Coating Deposition
Authors: Sobolev V.V. , Fagoaga I.
Published: October 2022

This paper demonstrates the capabilities of a new thermal spray process based on cold gas spraying and detonation gun technology. The method, called high-frequency pulse detonation, uses combustion pulses to heat powders to a temperature that allows good substrate-layer adhesion without the powder being melted. Superalloy, copper, and steel layers so produced are examined and compared with layers deposited by conventional thermal and cold spray processes. Paper includes a German-language abstract.
In-Situ Measurement and FEM Simulation of the Local Thermographic Heat Load on SOFC Components During Vacuum Plasma Spraying
Authors: Finkenwirth O. , Hoferer S.
Published: October 2022

This paper describes the equipment and procedures used to investigate the effects of the heat load on SOFC surfaces during vacuum plasma spraying. It explains how the authors used a vacuum-sealed IR camera to record thermographic images of the substrate surface as they sprayed different powders and as they varied the dc power, scanning speed, and stand-off distance of the plasma torch. The authors also studied the effect of different cooling methods, including conductive cooling from the backside via a water-cooled aluminum backplate and convective cooling from the front side with a nitrogen gas jet. Using the experimentally obtained data, the authors developed a thermal 3D model of the SOFC plasma spraying process that accounts for torch movements, substrate cooling, and layer growth. An outlook for future work is given expressing an intent to model stress fields within fuel cells during plasma spraying in order to simulate the development of residual stresses. Paper includes a German-language abstract.
Study of the Role of Cu-Al Intermetallics on the Adhesion of Plasma-Sprayed Copper on Aluminum using Laser Shock Adhesion Testing (LASAT)
Authors: Barradas S. , Borit F. , Guipont V. , Jeandin M. , Bolis C. , Boustie M. , Berthe L.
Published: October 2022

The adhesion of copper on aluminum depends on the presence of intermetallic phases. Such phases can form during spraying at the interface between the layer and substrate. This paper deals with the formation mechanism of the intermetallic phases and their influence on adhesion. The type, size, and distribution of the intermetallic phases are investigated as a function of spray parameters and bonding strength is determined by laser shock adhesion testing. Paper includes a German-language abstract.
Towards Fracture Mechanics of Thermally Sprayed Metallic Coatings using Indentation Technique for Edge Chipping on a Micron Scale
Authors: Margadant N. , Bürki G. , Siegmann S.
Published: October 2022

This paper assesses the fracture toughness of thermally sprayed NiCr, NiCrAlY, Mo, and NiCrBSi layers using an indentation method called edge chipping based on fracture mechanics. The procedure is done in a scanning electron microscope, enabling precise positioning and in-situ observation of crack growth. The paper reviews the basic principles of edge chipping, describes the experimental setup, and presents and analyzes the results. Preliminary test results show a clear correlation between edge toughness and wear under particle erosion. The influence of anisotropic properties parallel and perpendicular to the substrate surface is observed as well. Paper includes a German-language abstract.
Parameter Optimization of HVOF Sprayed Alumina and Effect of the Spray Parameters on the Electrical Properties of the Coatings
Authors: Rajamäki E. , Varis T. , Kulkarni A. , Gutleber J. , Vaidya A. , Karadge M. , Sampath S. , Herman H.
Published: October 2022

HVOF-sprayed alumina appears to be well suited for applications in semiconductor devices. This paper investigates the influence of HVOF spraying parameters on the electrical properties of alumina layers. Diagnostic tests show that small changes in gas ratios and flow rates can significantly alter particle and splat characteristics as well as the dielectric breakdown strength of the coatings. A large number of parameters are changed in order to assess the extent to which electrical properties can be controlled. Paper includes a German-language abstract.
Isothermal Oxidation of Cr3C2-NiCr Coatings Sprayed by High Velocity Techniques
Authors: Matthews S. , Hyland M. , James B. , Levi T.
Published: October 2022

This paper investigates the oxidation behavior of HVAF and HVOF sprayed Cr3C2-NiCr coatings under isothermal conditions. Over the range of 700 to 900 °C, all HVAF coating-only samples showed initial rapid mass gain before levelling off in a manner indicative of the formation of a protective oxide layer. The kinetics of the process were complex and did not conform to linear, parabolic, or logarithmic rate laws. The HVOF coatings exhibited a similar response. Where variations and anomalies are observed, they are attributed to differences in microstructure, composition, and spraying equipment. Paper includes a German-language abstract.
Advanced Metal Foam Composites
Authors: Maurer M. , Lugscheider E.
Published: October 2022

Various methods of making metallic foams and sponges have been studied, although the materials have not yet been put to commercial use. For foams produced using powder metallurgy, this is largely due to the poor surface quality and limited wear resistance. With thermal spray coatings, however, the foams can be upgraded to lightweight composites with defined surfaces, high wear resistance, and significantly increased strength. In this paper, commercial aluminum foams with closed cells and a closed foaming skin are coated with metal and ceramic layers by means of electric arc and plasma spraying. The coated foams are characterized based on their microstructure and the results of uniaxial compression testing. Paper includes a German-language abstract.
Removal of Thermal Sprayed Layers
Authors: Redeker C.F. , Bach Fr.-W. , Brandt S. , Louis H. , Versemann R.
Published: October 2022

This paper deals with the removal of thermal sprayed coatings. It describes chemical, mechanical, thermal, and erosive and abrasive waterjet coating removal processes. Plain waterjet and cryogenic techniques reduce the risk of damaging the substrate or bond layers because they are more selective and precise. In cases where thermal induced diffusion processes have changed the bond characteristics between the coating and substrate, the use of selective mechanisms tends to be limited. Paper includes a German-language abstract.
Investigation of Atmospheric Plasma Spray Process by In-flight Particle Pyrometry and Thermography
Authors: Fischer A. , Seemann K. , Lugscheider E.
Published: October 2022

This study examines the influence of in-flight particle properties and substrate temperature on the quality of ceramic layers obtained at atmospheric plasma sprayings. Investigators sprayed aluminum oxide and zirconium dioxide powders on metal substrates, using infrared temperature measurement techniques to monitor the process. The authors present the test data and explain what it reveals about particle flattening behavior, coating morphology, and the effect of cooling. The investigations show that the influence of substrate temperature must not be overlooked if layer properties are to be predicted and controlled. Paper includes a German-language abstract.
Laser Processing of ZrO2 Coatings
Authors: Ilyuschenko A.Ph. , Okovity V.A. , Tolochko N.K. , Shevtsov A.F.
Published: October 2022

This work investigates the processes involved in the formation of fragmented layers produced on the surface of ceramic coatings by means of laser melting. For the experiments, plasma sprayed zirconia was applied to steel substrates and treated with CO2 and Nd:YAG lasers. The modified layers were found to consist of macro-fragments 500-2000 µm in size, which in turn consist of micro-fragments 20-70 µm in size. Crack gaps were observed at both levels with widths of 10-15 µm and 1-5 µm, respectively. Heat resistance, hardness, density, and roughness were determined before and after laser melting, and the changes measured are shown to depend on emitted laser power. Paper includes a German-language abstract.
A Novel Method for Manufacturing of Micro-Discharge Devices
Authors: Paul T. , Hartmann R. , Heberlein J. , Schoenbach K.H. , Shi W. , Stark R.
Published: October 2022

In this paper, atmospheric plasma spraying is used to produce metal-insulator-metal structures that emit ultraviolet light via electrical discharge when sufficient voltage is applied. The metal layers are sprayed with molybdenum alloy powders and the insulator, a 50 to 100 μm dielectric layer, is sprayed with zirconia powder. The authors describe the fabrication process, assess the characteristics of the layers, and present test results that quantify the radiant power of the emitted UV light. Output power and efficiency of the plasma-sprayed structures are compared with that of commercial excimer lamps and the effects of coating erosion due to electrical discharge are discussed. Paper includes a German-language abstract.
Study on Tribological Properties of Non-Skid Coating Made by Arc Spraying
Authors: Shining M. , Changqing L. , Chunhai Y. , Xin L.
Published: October 2022

This paper discusses the performance of arc-sprayed composite layers produced using aluminum oxide-filled wires. In tribological property testing, the composite layers show good non-slip behavior with a high coefficient of friction. They also exhibit excellent wear resistance, four to six times better than that of aluminum layers, owing to the presence of aluminum oxide particles dispersed throughout the metal matrix. Paper includes a German-language abstract.
Research on the Properties of NiCr-Based Cermet Coatings for Boiler Tube Protection
Authors: Ding Z. , Lu C. , Huang B. , Zhan W.
Published: October 2022

The goal of this work is to develop a flame sprayed NiCr-Cr3C2 coating that resists oxidation, corrosion, and erosion in boiler environments and to assess the influence of Cr3C2 fraction and sealing on coating performance. In the experiments, NiCr cermet alloys with different proportions of chromium carbide were applied to boiler steel substrates by means of subsonic velocity flame spraying and some of the coatings were sealed with a silicon resin. The paper describes the various tests performed and presents the results. Paper includes a German-language abstract.
Auffüllen von Defekten und Verbinden durch thermisches Spritzen (Filling of Defects and Bonding via Thermal Spraying)
Authors: Bach Fr.-W. , Babiak Z. , Tegeder G.
Published: October 2022

This paper shows how thermal spraying, with an additional thermal treatment, can be used to join metal parts and fill surface defects. The joining and surface repair methods demonstrated in this work involve a wide range of materials and processes, and the results are characterized based on microstructural and elemental analysis and various property measurements. Paper text in German.
Microstructure and Wear Behavior of Cobalt-base PTA Layers Tested in a Molten Zn-Al Bath
Authors: Kim H.-J. , Yoon B.-H.
Published: October 2022

The aim of this study is to find a coating that can improve the wear resistance of bushings and sleeves used in continuous hot-dip galvanizing facilities. In the experiments, a number of wear-resistant alloys and their carbide composites are applied to stainless steel substrates by plasma transferred arc (PTA) surfacing and the resulting deposits are characterized based on XRD and SEM analysis, microhardness measurements, and pin-on-disk sliding wear tests conducted in a molten Zn-Al bath at 470 °C. Changes in microstructure during solidification are discussed and correlations are made with phase composition, hardness, wear behavior, and suspected wear mechanisms. Paper includes a German-language abstract.
Digital Diagnostics Based on CCD Imaging for Monitoring Thermal Spray Processes
Authors: Ignatiev M. , Senchenko V. , Dozhdikov V. , Smurov I. , Bertrand P.
Published: October 2022

This paper describes the development of a diagnostic system that monitors in-flight particle diameters, velocities, and temperatures during thermal spraying. The system is based on a low-cost CCD camera and user-developed software. The camera incorporates a 732 x 282 pixel sensor with high sensitivity in the near IR range where the only radiation is that of the particles. User-developed software modules handle signal processing, image analysis, calibration, and data visualization. In video images, particles appear as light tracks of varying length, width, and intensity, corresponding (respectively) to velocity, diameter, and temperature. A test case in which Cr2O3 powder is sprayed in a plasma jet demonstrates the capabilities of the diagnostic system. Paper includes a German-language abstract.
Spark Plasma Sintering of Plasma Sprayed HA Coatings
Authors: Khor K.A. , Yu L.G. , Cheang P.
Published: October 2022

This paper examines the influence of spark plasma sintering (SPS) on plasma-sprayed hydroxyapatite (HA) coatings. For comparison purposes, a conventional heat treatment is also carried out. The surface microstructure as well as the crystallinity of each layer is determined by means of SEM and XRD analysis. Test results show that the crystallinity of the layers increases with increasing SPS temperature up to 800 °C and a large amount of β tricalcium phosphate is formed. Paper includes a German-language abstract.
Influence of Atomization Gas on Nitriding Process Under Ti Arc Spraying
Authors: Sakoda N. , Hida M. , Sakakibara Y. , Tajiri T.
Published: October 2022

Most of the work published to date on thermally sprayed titanium has been carried out in controlled atmospheres, yielding little information about the reaction of titanium with nitrogen and oxygen. The aim of this study is to investigate the influence of atomization gas on the formation of titanium nitrides and oxides during wire arc spraying. In the experiments, three types of gases (air, nitrogen, and argon) are used to deposit Ti on steel substrates and the microstructure and composition of the coatings, as well as the wire feedstock, are assessed by means of SEM and XRD analysis. The effect of spraying distance on crystal structure and nitrogen content is also investigated in the case of the argon-atomized coating. Paper includes a German-language abstract.
Mechanically Alloyed SiC Composite Powders for HVOF Applications
Authors: Wielage B. , Wilden J. , Schnick T. , Wank A. , Beczkowiak J. , Schülein R. , Zoz H. , Ren H.
Published: October 2022

This paper describes how mechanically alloyed SiC composite powders with different metallic matrices are produced and applied by HVOF spraying. The sprayed layers are characterized in terms of layer morphology and wear behavior and compared with conventional cermets. Paper includes a German-language abstract.
Attractors of 2D Navier–Stokes system of equations in a locally periodic porous medium
Authors:   M.V. Lomonosov Moscow State University, Kazakhstan Branch, Bekmaganbetov K.A. ,   Institute of Mathematics and Mathematical Modeling, Chechkin G.A. ,   Institute of Mathematics and Mathematical Modeling,   M.V. Lomonosov Moscow State University,   Institute of Mathematics with Computing Center Subdivision of the Ufa Federal Research Center of Russian Academy of Science, Toleubay A.M. ,   Institute of Mathematics and Mathematical Modeling,   L.N. Gumilyov Eurasian National University
Published: October 2022

This article deals with two-dimensional Navier–Stokes system of equations with rapidly oscillating term in the equations and boundary conditions. Studying the problem in a perforated domain, the authors set homogeneous Dirichlet condition on the outer boundary and the Fourier (Robin) condition on the boundary of the cavities. Under such assumptions it is proved that the trajectory attractors of this system converge in some weak topology to trajectory attractors of the homogenized Navier–Stokes system of equations with an additional potential and nontrivial right hand side in the domain without pores. For this aim, the approaches from the works of A.V. Babin, V.V. Chepyzhov, J.-L. Lions, R. Temam, M.I. Vishik concerning trajectory attractors of evolution equations and homogenization methods appeared at the end of the XX-th century are used. First, we apply the asymptotic methods for formal construction of asymptotics, then, we verify the leading terms of asymptotic series by means of the methods of functional analysis and integral estimates. Defining the appropriate axillary functional spaces with weak topology, we derive the limit (homogenized) system of equations and prove the existence of trajectory attractors for this system. Lastly, we formulate the main theorem and prove it through axillary lemmas.
A priori estimate of the solution of the Cauchy problem in the Sobolev classes for discontinuous coefficients of degenerate heat equations
Authors:   Al-Farabi Kazakh National University, Koilyshov U.K. ,   Institute of Mathematics and Mathematical Modelling, Beisenbaeva K.A. ,   Academy of Logistics and Transport, Zhapparova S.D. ,   Al-Farabi Kazakh National University
Published: October 2022

Partial differential equations of the parabolic type with discontinuous coefficients and the heat equation degenerating in time, each separately, have been well studied by many authors. Conjugation problems for time-degenerate equations of the parabolic type with discontinuous coefficients are practically not studied. In this work, in an n-dimensional space, a conjugation problem is considered for a heat equation with discontinuous coefficients which degenerates at the initial moment of time. A fundamental solution to the set problem has been constructed and estimates of its derivatives have been found. With the help of these estimates, in the Sobolev classes, the estimate of the solution to the set problem was obtained.
A different look at the soft topological polygroups
Authors:   Department of Mathematical Sciences, Yazd University, Mousarezaei R. , Davvaz B. ,   Department of Mathematical Sciences, Yazd University
Published: October 2022

Soft topological polygroups are defined in two different ways. First, it is defined as a usual topology. In the usual topology, there are five equivalent definitions for continuity, but not all of them are necessarily established in soft continuity. Second it is defined as a soft topology including concepts such as soft neighborhood, soft continuity, soft compact, soft connected, soft Hausdorff space and their relationship with soft continuous functions in soft topological polygroups.
Dor crônica e bem-estar em animais de companhia
Authors: Cunha Erika , Hertel Adriane , Genaro Gelson
Published: October 2022

This revision has as its objective to bring attention to the importance of collaborative studies of the biological foundations of pain and its relationship with psychiatric veterinary clinic practices. During the entire period of their lives animals come across challenging and stressful situations that are capable to unleash complex neuroendocrinal responses, resulting in adaptations on behavior and physiology, in order to maximize the probability of survival. The pain can alter the normal brain functions, altering the individual’s confrontation strategies as well as affect their quality of life. The knowledge around neuroanatomy, neurophysiology and the standard concept of animal well-being can renew the attention given to this complex system and promote a possible strategy for the treatment of painful conditions.
Bem-estar e epidemiologia de estereotipias em equinos expostos em feira agropecuária
Authors: Da Silva Thayná , Rocha Flora Frota Oliveira Teixeira , Vieira da Silva Paulo Ricardo , Gomes do Vale Werner Aguiar , Machado de Araújo Cynthia Maria , Santos Nayane Batista dos , Rocha Carlos Sérgio Teixeira
Published: October 2022

The experiment was conducted at the Pedro Felício Cavalcante exhibition Park located in the municipality of Crato-CE, during the 86th edition of the Agricultural Exhibition of Crato (Expocrato) from July 13 to 21, 2019. The objective was to assess the welfare of animals exposed for sale. Twenty horses were examined, all males, aged between 3 and 6 years, for 9 days. The animals were being kept in 2.0 x 3.0 m masonry stalls during the 9 days of exposure. The climatic variables were obtained from a thermo-hygrometer (AK28 new). The horses were inspected every 30 minutes, distributed to all animals for 9 days, between 7 am and 5 pm, to observe the behavior during the peak of people at the fair. The type and repeatability of the stereotypes, the temperature and humidity index (ITU) and the facilities were observed. The stereotypes analyzed were: coprophagy, licking troughs, walls and chains, vertical head movements, biting wood, aerophagia, scratching the bay, lateral body sway, digging with the legs, walking in circles and aggressive attitude. The most observed stereotypes were the aggressive attitude (60%), biting chain or wood (40%) and aerophagia (25%). Aggressiveness was observed most frequently in the afternoon, corresponding to the time interval with the greatest movement of people in the park. The licking of troughs and chains occurred mainly during the afternoon, between meals. Aerophagia was prevalent during the morning, this behavior may be due to stress and lack of physical activities since the animals only leave the bay for bathing. The values of the ITU were higher in the first days of exposure, the ITU was already critical at the beginning of the evaluations with an average of 73% and extended to the last days of exposure, indicating that the animals could present marked thermal discomfort. Among the management conditions, facilities and climatology, important risk factors were identified, which are harmful to horses in the way that they make the animals' environmental and climatic comfort impossible. It was concluded that the stereotypes in horses exhibited at the Crato Agricultural Exhibition are diverse and frequent and the facilities and protocols for animal/visitor interaction do not provide comfort to the animals.
Nexos entre bem-estar animal na pecuária e mudanças climáticas, no contexto do IPCC
Authors: Ambrósio Luís , Toledo Luciandra Macedo de
Published: October 2022

Improving the understanding of the nexus between animal welfare and climate change can help to formulate more inclusive and ethical policies and actions in livestock. In the literature, there are hundreds of scientific articles indexed with the terms “animal welfare” and “climate change”. In reviewing the Intergovernmental Panel on Climate Change (IPCC) reports, we found that while historically evidence of these nexus was reported, direct citations of the term “animal welfare” were rare. We conclude that more livestock research is needed to assess animal welfare in field situations involving extreme weather events attributed to climate change. The voluntary participation of animal welfare experts in the IPCC working groups is necessary to fill the gaps observed in their assessment reports.
Bem-estar felino: Manutenção em espaços reduzidos
Authors: Genaro Gelson , Beatriz Pizani Soares Bianca
Published: October 2022

Currently, the cat is one of the main companion animals, and in some countries, it already surpasses the dog in this condition, and due to this high number of animals, it is sometimes kept in situations that are not always adequate for a high degree of well-being. Understanding, identifying and correcting these maintenance situations in the three main maintenance situations identified in this manuscript will significantly increase this level of well-being. Meeting the needs of the individual, under specific conditions, will increase their well-being. This animal, when kept in inadequate conditions (particularly in high numbers of animals and/or with limitations in its movement) will present behaviors indicative of stress, and the identification of such situation, as early as possible, will allow its recovery and adequacy of conditions, raising your well-being to satisfactory levels.
Pengembangan Lks Berbasis Etnomatematika (Budaya Lubuklinggau) Untuk Menumbuhkan Motivasi Belajar Matematika Siswa
Authors: Luthfiana Maria , Friansah Drajat , Marcicilia Bunga
Published: October 2022

The purpose of this research is to develop student worksheet based on ethnomatematics on the system of three-variable linear equation system for class X MAN 1 (Model) Lubuklinggau and find out the quality of worksheets developed in terms of validity, practicality, and effectiveness. This research is a development study with a 4-D development model (four D model). This model consists of 4 stages of development, namely Define, Design, Develop, and Disseminate. The results of the study, in the validity aspect, the worksheets developed received a category (Good) in the component of language worthiness with an average score of 3.00. In the content eligibility component, it gets a category (Very Good) with an average score of 3.24, while the component in the eligibility component gets a (Good) predicate with an average score of 3.04. The quality of teaching materials is seen from the aspect of practicality included in the criteria (Good) with an average score of 3.13 determined based on the results of students' responses to the worksheet. The effectiveness of worksheets can be seen from the aspects of student motivation at the time before the development of worksheets showing an average score of 3.01 while after showing an average score of 3.74 included in the criteria (Very Good). Conclusion, LKS which was developed based on ethnomatematics has valid, practical and effective criteria used to increase the learning motivation of students in class X MAN 1 (Model) Lubuklinggau.

Keywords: Ethnomatematics, LKS, Lubuklinggau Culture, Learning Motivation
Pengembangan Media Pembelajaran (Komik) Matematika Berbasis Karakter Kebangsaan
Authors: Armi Septi , Adisel Adisel , Saltifa Poni
Published: October 2022

This research aims to examine how the development of National Character-Based Mathematical Learning Media (Comics). This research is a development study using plomp model consisting of 3 stages namely: Initial investigation, Prototype Manufacturing and product assessment. The development test was conducted to a small group of 5 students and 1 Maths Teacher. The results of the study obtained data from the validation of media experts obtained a score of 76% with a very valid category, validation of language experts obtained a score of 86.36% with very valid criteria and validation of material experts obtained a score of 82.23% with criteria also very valid then the media was corrected according to the advice of the validator. Product trials by conducting practicality tests by teachers obtained a score of 80.76% with a very practical category and practicality tests to a small group obtained results of 84.23% with very practical criteria. In conclusion, the learning media (Comics) of National Character-Based Mathematics that have been developed is practically feasible to be used in the learning process.  

Keywords: National Character, Mathematics Comics, Learning Media
Peningkatan Kemampuan Berpikir Tingkat Tinggi Siswa Melalui Pembelajaran Matematika Berbantuan LKPD Berbasis HOTS
Authors: Purwasi Lucy Asri , Fitiyana Nur
Published: October 2022

The purpose of this study was to find out the improvement of students' high level of thinking ability through hots-based LKPD rocky mathematics learning. This research is a kuantitafif research with research design one group pretest -posttest design. This research instrument is a question of essays totaling 3 questions consisting of indicators of tingi level thinking, namely analyzing, evaluating and creating. The sample selection was done in cluster random sampling with the selected sample is class VIII-2 which consists of 22 students. The data obtained were analyzed using unilateral t-tests. Based on the results of data analysis at a significant level of α = 0.05 obtained ρ value 0.033 with an average high level of thinking ability of students in grade VIII SMP Negeri 5 Lubuklinggau city is 74.09 with a good category. In conclusion, there is a significant increase in students' high-level thinking ability after doing LKPD-assisted mathematics lessons based on HOTS.

Keywords: High Level Thinking, HOTS Based LKPD, Mathematics
Upaya Meningkatkan Hasil Belajar Matematika Melalui Cooperative Learning Tipe TAI (Team Assisted Individualization)
Authors: Amarullah Ahmad
Published: October 2022

This study aims to improve mathematics learning outcomes through cooperative learning type TAI (Team Assisted Individualization) in fifth grade students of SD Muhammadiyah 4 Tangerang City. This research was conducted on 30 students consisting of 14 male students and 16 female students. The learning used in this research is classroom action research using the spiral model of Kemmis and Mc Taggart. The stages of classroom action research according to Kemmis and Mc Taggart are as follows: The main concept of classroom action research consists of four components, namely planning (planning), action (acting), observation (observing) and reflection (reflecting). The results obtained in the first cycle, students who achieved complete learning were 20 students (66.7%) with an average score of 67 student learning outcomes, the second cycle reached 25 students (83.3%) with an average learning outcome. 74 , and the third cycle reached 28 students (93.3%) with an average learning outcome of 77. In conclusion, the application of the Team Assisted Individualization learning model to fifth grade students of SD Muhammadiyah Tangerang can improve students' mathematics learning outcomes. This can be seen from the increase in class averages and students who reach the KKM.

Keywords: Mathematical Ability, Team Assisted Individualization (TAI) Method
Nouvelles approches diagnostiques de l’insuffisance rénale aiguë
Authors: Markarian T.
Published: October 2022

L’insuffisance rénale, véritable problème de santé publique, concernerait plus de 82 000 personnes en France. On estime que 5 à 10 % de la population française souffriraient d’une maladie rénale pouvant conduire à une insuffisance rénale avec un taux de mortalité de plus de 10 % par an. À l’inverse de la maladie rénale chronique irréversible, l’insuffisance rénale aiguë est considérée comme un dysfonctionnement transitoire et réversible. Au-delà de l’intérêt de la prévention, le diagnostic précoce de l’insuffisance rénale aiguë permettrait de mettre en place des thérapeutiques adaptées et ciblées afin d’éviter l’évolution vers des lésions rénales irréversibles. Cependant, il demeure un véritable challenge pour le praticien puisque l’on présume que près de 10 % de la population française présenteraient des lésions rénales asymptomatiques. Bien que la définition de l’insuffisance rénale aiguë ait été simplifiée durant ces dernières années, il existe de nombreuses limites. En parallèle, des progrès majeurs ont été réalisés notamment en termes de diagnostic. L’objectif de cette mise au point est de faire un rappel sur l’évolution de l’insuffisance rénale aiguë, les définitions actuelles et de présenter les nouvelles approches diagnostiques en cours de développement.
Strategy of the Election Supervisory Body (Bawaslu) in Preventing Violations in the 2019 General Election (Election)
Authors: Nasution Sri Roserdevi , Bernike Lidia , Johan Mudir
Published: October 2022

Election violations if they always occur have an impact on the integrity of Bawaslu as an election supervisory agency. Pekanbaru City Bawaslu must have a strategy and role to prevent, minimize and deal with election violations. The results of this research Bawaslu Pekanbaru City has carried out its role effectively through its strategies. The Pekanbaru City Bawaslu's strategy in the 2019 election is monitoring stalls, politicizing sara, monitoring posts and double data analysis. In dealing with violations in accordance with Law Number 7 of 2017 concerning Elections, Bawaslu is only authorized to make decisions on administrative violations carried out by the KPU. The obstacle for Bawaslu in carrying out its role is the inefficient budget and time in voting and collecting data on violations.
Działalność Sądu Okręgowego w Radomiu oraz podległych mu sądów Grodzkich w 1933 roku
Authors: Składanek Bartłomiej
Published: October 2022

Celem niniejszego artykułu jest przybliżenie wybranych aspektów z działalności Sądu Okręgowego w Radomiu i podległych mu Sądów Grodzkich 1933 r. oraz próba oceny ich sprawności i efektywności. Temat ten pozostaje nadal zbadany jedynie na poziomie analizy aktów prawnych, przy braku oceny faktycznej aktywności sądów. Zakres artykułu został ograniczony do okresu od 1 stycznia do 31 grudnia 1933 r. Podstawę źródłową opracowania stanowiły w głównej mierze akta Sądu Okręgowego w Radomiu oraz Sądów Grodzkich, zachowane w zasobie Archiwum Państwowego w Radomiu. Wymiernym efektem badań podjętych w niniejszym artykule jest stworzenie zestawienia statystycznego dotyczącego ruchu spraw Sądu Okręgowego i podległych mu Sądów Grodzkich w 1933 r. w zakresie ruchu spraw cywilnych i karnych, jak również czynności w zakresie prowadzonych śledztw, dzięki czemu przedstawiono dynamikę wpływu, załatwień i pozostałości spraw oraz sprawności sądów w ich załatwianiu.
Wpływ tarczy antykryzysowej na ograniczenie uprawnień gminy jako zamawiającego
Authors: Dąbrowska Sylwia
Published: October 2022

Artykuł porusza problematykę regulacji art. 15r1 tarczy antykryzysowej uchwalonego ustawą o dopłatach do oprocentowania kredytów bankowych udzielanych przedsiębiorcom dotkniętym skutkami Covid-19 oraz o uproszczonym postępowaniu o zatwierdzenie układu w związku z wystąpieniem Covid-19, który wprowadza do umów o zamówienie publiczne, ograniczenie uprawnień zamawiającego w związku z SARS-CoV-2 i stanowi, że w okresie obowiązywania stanu zagrożenia epidemicznego albo stanu epidemii ogłoszonego w związku z COVID-19, i przez 90 dni od dnia odwołania stanu, który obowiązywał jako ostatni, zamawiający nie może po-trącić kary umownej zastrzeżonej na wypadek niewykonania lub nienależytego wykonania umowy o zamówienie publiczne z wynagrodzenia wykonawcy lub z innych jego wierzytelności, a także nie może dochodzić zaspokojenia z zabezpieczenia należytego wykonania tej umowy, o ile zdarzenie, w związku z którym zastrzeżono tę karę, nastąpiło w okresie obowiązywania stanu zagrożenia epidemicznego albo stanu epidemii. Ustawa zmieniająca weszła w życie z dniem 24 czerwca 2020 r.
La influencia de la necesidad de cierre cognitivo en la adhesión a la ideología del rol de género
Authors: Jaume Luis Carlos , Roca Marcelo Agustín , Ferrero Paula Florencia , Azzollini Susana Celeste
Published: October 2022

En pleno siglo XXI las desigualdades de género siguen vigentes, debido mayormente a la construcción social de estereotipos de género. Una teoría psicológica que permite comprender dichos estereotipos es la Necesidad de Cierre Cognitivo. Es por ello, que el objetivo de esta investigación es analizar la relación entre la Necesidad de Cierre Cognitivo, entendido como la motivación de los sujetos por buscar y mantener una respuesta ante una situación ambigua, y la Ideología del Rol de Género, la cual hace referencia a una actitud prejuiciosa basada en la supuesta inferioridad de las mujeres. Para ello, se contó con una muestra no probabilística de 401 sujetos, mayores de 18 años, que habitan en la Argentina, 290 mujeres y 111 hombres. Se administró el Test Revisado de Necesidad de Cierre Cognitivo, la Escala de Ideología del Rol de Género y un cuestionario sociodemográfico. Los resultados evidenciaron una correlación positiva entre Necesidad de Cierre Cognitivo e Ideología del Rol de Género. Además, se halló una asociación directa entre edad e Ideología del Rol de Género. También se evidenció una relación inversa entre el nivel educativo, Necesidad de Cierre Cognitivo e Ideología del Rol de Género. Finalmente, la Ideología del Rol de Género presentó disparidad respecto al género, donde los hombres presentaron rangos más elevados que las mujeres. Se concluye que los sujetos con mayor incomodidad ante la ambigüedad, estrechez mental y urgencia por el cierre poseen mayor adherencia a ideologías que sostienen la diferencia entre los géneros.
Hackathon as an instrument for innovation in collaborative networks: a bibliometric analysis
Authors: Macedo Vanessa Pontes de , Ferro Lebres Vera , Bernardo Junior Ronaldo
Published: October 2022

Objective: The objective of this study is to analyze hackathon contributions as an instrument for innovation in collaborative networks.

Methodology: A bibliometry was performed in the Scopus and Web of Science bases through the Bibliometrix packages and the R Studio software. Publications analysis techniques were used describing the year and the group of origin (by Bradford Law), authorship analysis by the authors' relevance and their productivity (by Lotka Law), scientific contributions by country and collaboration between countries, Quotations of document with the cloud of word, as well as a thematic description of the hackathons universe.

Results: An exponential increase in scientific hackathon publications from 2019 has been verified. Hackathon studies address and connect the theme mainly with innovation, collaboration, open data, education and covid-19. The increase of hackathon studies occurred during the pandemic period.

Limitations: The study was delimited in two databases (Scopus and Web of Science), and in the English language. The expansion to other bases and languages ​​can produce different results from the above, and represents a limitation of this study.

Originality: The analyzes performed in this study made it possible to structuring the scientific literature on hackathon.