bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improvement of In-Flight Particles Diagnostic System to Monitor Process Stability in Thermal Spray Processes
Authors: Jibran W. , Nadeau A. , Desmarais C. 
Published: September 2022

Abstract
In the past 25 years, we have seen thermal spray processes such as Atmospheric Plasma Spray (APS), High Velocity Oxygen Fuel Spray (HVOF) and Suspension Plasma Spraying (SPS) transition from research and development towards mainstream production technology. Since thermal spraying is a multi-parameter and multi-response process, it is susceptible to process instabilities. Consistency and repeatability are of utmost importance in production lines that spray high volumes of coatings. Since process parameters such as feed rate, particle velocity, temperature, electrode wear and nozzle blockages can dramatically affect the coating properties, monitoring and controlling these parameters can significantly improve the process repeatability. This study presents an improvement in the online process monitoring sensor, the Accuraspray 4.0, to achieve repeatable coatings. The Accuraspray 4.0 introduces a new process stability measurement in order to quantify and control the variability in thermal spray processes and to make process monitoring more production friendly. The sensor includes a stability analysis tool which compares the real-time standard deviations of nominal plume parameters against bench-marked values found using statistical principles. This study details the theory behind the process stability measurement and presents a case study conducted in collaboration with an automotive production facility employing this new feature. It was found that monitoring the standard deviations of parameters being measured can allow the user to control stability in their thermal spray process to spray large volumes with higher confidence in the consistency of their coatings. This upgrade brings the Accuraspray 4.0 one step closer to becoming the industry standard for thermal spray production facilities.
Development of an Arc-Based Diagnostic Procedure for Process Characterization in DC Plasma Spraying
Authors: Thomas G. , Limburg M. , Mihm S. , Rupprecht C. , Gruner H. 
Published: September 2022

Abstract
The process properties for DC plasma spraying are affected by the arc as the source of energy for plasma generation. For instance, the position of the anode attachment point, the arc movement and the arc formation are significantly influencing process stability, reproducibility and coating quality. Following a qualitative and objective assessment of the complete arc movement and plasma generation is leading to an improved process characterization. Therefore, a preventive arc-based analytical method for DC plasma spraying is developed. Based on a representative data volume and realized by an automatic analysis of high-velocity recordings of the arc dynamics and correspondent arc voltage measurements, the evaluations are carried out. A developed software algorithm automatically detects for all images of the video sequence (at least 3200 images) the anode center axis, the arc orientation and the position of anode attachment point on the anode surface referring to the anode center, with simultaneous compensation of aberrations. This allows an objective assessment of the complete arc movement. In further investigations, the detection limit of the developed measuring system is determined and the effects on the arc behavior and the coating process could be quantified. Thus, the developed automated analysis of the arc dynamics in the DC plasma generator corresponds to an arc-based process characterization in DC plasma spraying process with relevance to developers (e.g. new anode nozzle designs) and end users (process control).
Importance of Evaluation Procedure of Particle State in Atmospheric Plasma Spraying
Authors: Hudomalj U. , Fallahi Sichani E. , Weiss L. , Nabavi M. , Wegener K. 
Published: September 2022

Abstract
In-flight particle state has been shown to play a crucial role in determining the properties of thermally sprayed coatings. Therefore, process control strategies have been suggested to keep the in-flight particle state constant in order to decrease the variability of coating quality. Such strategies are already used to some extent in industrial applications, where the particle state is measured before starting the coating of a part to make a go/no-go decision based on whether the values are inside a predefined process window. This paper shows the importance of the evaluation procedure of the in-flight particle state, with focus on process control applications. The paper demonstrates this on the example of atmospheric plasma spraying (APS) of yttria-stabilized zirconia (YSZ), using a commercially available sensor system Accuraspray for measuring the ensemble particle temperatures and velocities as descriptors of the in-flight particle state. It is concluded that the stabilization time of the particle jet might be different from what is practically considered. Moreover, the paper investigates an approach of monitoring the in-flight particle state during a coating run without having to install the sensor system on the robot arm.
Assessment of High Entropy Alloys as Thermally Sprayed Heating Elements
Authors: Bobzin K. , Heinemann H. , Schacht A. 
Published: September 2022

Abstract
An efficient temperature control on tool surfaces is essential in processes like injection moulding or die casting. A thermally sprayed heating coating could combine dynamic heating properties with a small assembly space as it is sprayed directly onto the cavity surface. With their intrinsically high electrical resistivity and low thermal expansion as compared with traditional alloys, High Entropy Alloys (HEA) show promising properties for the use as heating elements. Thus, the well-studied HEA Al0.5CoCrFeNi was used as a starting material for additional alloying with Zr and Si to force further lattice distortion in the solid solution. HEAs of differing compositions were melted and characterized. In the process, the potential of HEAs was assessed by characterizing their phase composition, thermal stability, and electrical resistivity. The characterized HEAs show a solid solution mainly consisting of fcc and bcc structure. Moreover, the composition Al0.5CoCrFeNiZr0.2Si0.2 was determined as stable after heat treatment at 600 °C for 324 h. In addition, the electrical resistivity was raised by over 20 % relative to the starting material. As a result, a hitherto unknown HEA composition was detected to possess superior properties to traditional alloys for the application as heating coating.
Heterogeneous Thermal Barrier Coatings with Engineered Gradient Interfaces
Authors: Musalek R. , Tesar T. , Medricky J. 
Published: September 2022

Abstract
Recent development of plasma spraying with liquid feedstocks enabled deposition of novel thermal barrier coatings (TBCs) with top-coats incorporating various desirable features, such as columnar microstructure or ultrafine porosity. Moreover, different materials may be relatively easily combined, e.g., by alternating feedstocks in the feed line or using feedstock mixtures. Coatings with gradient change of chemistry/microstructure towards the free-surface can be also prepared by gradual change of the feedstock composition, which may be potentially beneficial for example to mitigate stresses at the macroscopic interfaces between TBC layers (typically bond-coat/top-coat or within layered top-coat). In this study, three experimental TBCs with gradient top-coats were successfully deposited by hybrid water/argon-stabilized WSP-H plasma torch, i.e., one version of coating with 8 wt.% yttria stabilized zirconia transitioning into gadolinium zirconate Gd2Zr2O7 (YSZ→GZO) and two versions of Al2O3 transitioning into YSZ (Al2O3→YSZ). Thermal cycling fatigue (TCF) test with peak temperature of 1100 °C showed outstanding thermal shock resistance of the YSZ→GZO coating and mediocre to poor resistance of both Al2O3→YSZ coatings.
Numerical Study of Ceramic Retention Mechanism in Cold Spraying
Authors: Elkin A. , Lama A. , Dautov S. , Shornikov P. 
Published: September 2022

Abstract
Cold spray is a well-established thermal spray process for metal coatings, but it is unsuitable for depositing ceramics. However, cold spray has been used to spray a thin layer of ceramics to improve surface properties. This paper aims to find the spraying parameters to deposit alumina particles onto an aluminum substrate, investigating the retention phenomenon through computational modelling. We used the finite element analysis in the coupled Eulerian Lagrange formulation to predict the particle-substrate interaction. The Johnson-Cook plasticity model and Mie-Gruneisen equation of state were employed to describe the substrate behaviour. Alumina particles were assumed to be elastic. To assess the retention phenomenon, we varied spraying parameters such as particle speed, substrate temperature, and deposition angle. The findings showed that initial velocity and the substrate temperature facilitate penetration of the ceramic particles into the substrate; thus, the penetration increases the chance of retention into the substrate. The deposition angle affects the jet shape, and specific deposition angles cause erosion. Overall, the findings denote that certain cold spraying parameters may improve the retention of ceramic particles into metal substrates.
Instrumen Keterampilan Smash dalam Permainan Tenis Meja
Authors: Indrawan Budi , Rubiana Iman , Herliana Melya Nur 
Published: September 2022

The purpose of this study was to produce a product in the form of a smash skill instrument in a table tennis game, and to obtain the validity and reliability of a smash instrument for a table tennis game. This research uses the Sukmadinata research and development (R&D) method with a sample of table tennis athletes in the City of Tasikmalaya with cadet and junior age groups for a limited trial of 10 people and an extensive trial of 21 people. This test instrument was examined by expert judgment first, expert judgment for the test instrument was tested by table tennis experts and measurement test experts. The results of this study, the test instrument was declared valid and reliable seen from the results of calculations where the trial was limited the level of validity of the test was 0.70 and the reliability of the test was 0.87 while for the broadest trial the validity of the test was 0.47 and the reliability of the test was 0.59. In conclusion, the smash skills test instrument in a table tennis game can be used for the Tasikmalaya City area.
Keywords: Instruments, Smash Skills, Table Tennis Games
Penerapan Teaching Game for Understanding terhadap Hasil Belajar Permainan Bola Voli
Authors: Sebila Fahmi Hadi , Kusmaedi Nurlan , Juliantine Tite 
Published: September 2022

This research aims to examine the effect of the Teaching Game For Understanding (TGFU) learning model by using a modified ball to hours volleyball learning outcomes. The participants of this study were Social Sciences students of SMA Negeri 3 Sukabumi City, as many as 90 students were divided into 3 groups. The first group of students who were given TGFU treatment with a modified ball, the second TGFU with normal ball, and the third group without treatment. The method used in this research is The Matching-Only pre-test-posttest control group design and teaching with ball modification. The instrument used in this study are the GPAI. The results of this study (1) there is a development of the volleyball game results with the TGFU learning model using a modified ball (2) there is no development of volleyball game results with the TGFU learning model using normal balls. In conclusion, the delivery of the TGFU learning program using modified balls increases volleyball learning outcomes.
Keywords: Teaching Game for Understanding, Volleyball.
Analisis Latihan Keterampilan Teknik Dasar Sepak Bola untuk Atlet Pemula
Authors: Atiq Ahmad , Budiyanto Kumbul Selamet 
Published: September 2022

This study aims to analyze the basic technical skills training of football, especially for novice athletes. This research was conducted in the city of Pontianak. The research population is football clubs or schools in the city of Pontianak. The method used in this research is descriptive research with a quantitative approach. The results of this study indicate that every soccer athlete, in this case beginners, still has a high weakness of 30%, 20% excess, 10% strength, and 40% chance. The conclusion of this study shows that the basic technical skills of novice football athletes in the city of Pontianak have a great opportunity to develop basic technical skills to the advanced level. If each athlete can provide competitiveness with the skills possessed by each athlete with a comprehensive, measurable, patterned and sustainable training program, this novice athlete will be good.
Keywords: Analysis, Skills, Basic Techniques, Football
Pengembangan Bahan Ajar Bola Tangan Berbasis Video Bagi Mahasiswa STKIP PGRI Lubuklinggau
Authors: Fikri Azizil , Popalri Popalri 
Published: September 2022

This study aims to obtain valid handball teaching materials for Health and Recreation Physical Education students at STKIP PGRI Lubuklinggau. This study uses a Research and Development research and development (R&D) approach, where this research develops teaching material products in the form of a handball game book for students of physical health and recreation education at STKIP PGRI Lubuklinggau. This research is only limited to the development stage at the validation stage. The validity test in this stage is the theoretical validity, namely the validation carried out by experts in their field consisting of three validators. The validation includes language validation, material / content validation and media / design validation. From the results of the handball module research on Health and Recreation Physical Education students developed, it fulfills the validity criteria with language validity values ​​of 94%, media / design validity of 90% and content / material validity values ​​of 94% which can be interpreted as very valid. Conclusion, the handball module for Health and Recreation Physical Education students of STKIP PGRI Lubuklinggau which was developed is very valid.
Keywords: Teaching Materials, Handball
Promosi Olahraga Tinju Adat Etu Sebagai Pariwisata Tahunan di Kecamatan Boawae Kabupaten Nagekeo
Authors: Rawe Aschari Senjahari , Nono BS Yohana 
Published: September 2022

This study aims to determine how the implementation of Etu traditional boxing in Bhoawae sub-district and the promotion of this sport as a type of tourism in Nagekeo district, East Nusa Tenggara. This research is a qualitative descriptive study with 4 informants as the subject of the study. The data collection technique was carried out by in-depth interviews, documentation and observation. Data were analyzed using Miles Huberman's interactive analysis model. The results showed that the procedures for implementing the traditional Etu Boxing were carried out by traditional rituals and traditional dances. Boxers wear special equipment such as headbands, tai kolo, dhese and you gauze. Each round will end if one of the boxers has bleeding which symbolizes fertility. In conclusion, Etu is a boxing attraction that involves traditional rituals as an expression of gratitude for the people of the Bhoawae traditional village in welcoming the harvest, while the Etu promotion form currently being pursued by the government Nagekeo area is by making video story telling
Keywords: Boxing, Adat Etu, Sports Promotion, Tourism
Analisis Teknik Renang Gaya Bebas pada Atlet Renang
Authors: Harmoko Harmoko , Sovensi Ever 
Published: September 2022

This study aimed to describe freestyle swimming techniques in Athlete Noren Tirta Buana Musi Rawas. This research includes qualitative descriptive research types. Data collection in this study using Interview, Observation and Documentation techniques. The source of the data collected in the study is 1 Object which is a training ground in Noren Tirta Buana Musi Rawas. Data retrieval is carried out in the afternoon, after the data collected data is observed directly. The findings obtained by the researchers showed that freestyle swimming techniques are seen from aspects of body position, arm movement, leg movement, breathing movements, and coordination in Athlete Noren Tirta Buana Musi Rawas from 15 participants who took observation tests, interviews and documentation. In conclusion, the average freestyle swimming techniques athletes are in accordance with the theoretical study where there are 11 people who have done the movement correctly and 4 more people are still wrong in doing foot movements.
Keywords: Athlete Noren Tirta Buana Musi Rawa, Engineering Freestyle Swimming
Motif Masyarakat Berolahraga
Authors: Sari Zihan Novita , Kumbara Hengki , Akhbar M. Taheri 
Published: September 2022

The purpose of this study was to determine the community's motives for exercising in Kambang Iwak, Palembang City. The research method used is the descriptive method. Data collection using a questionnaire instrument. The research data were analyzed using the percentage formula. The results of the study, based on internal motives who answered "Yes" obtained a score of 681 or 85.125, and those who answered "No" obtained a score of 119 or 14.875%. and the results based on external motives who answered "Yes" obtained a score of 695 or 86.875% and those who answered "No" obtained a score of 105 or 12.5%. In conclusion, external motives play a very important role in exercising at Kambang Iwak Palembang City by obtaining a higher score of 86.875%.

Keywords: Community Exercise Motive
The purpose of this study was to determine the community's motives for exercising in Kambang Iwak, Palembang City. The research method used is the descriptive method. Data collection using a questionnaire instrument. The research data were analyzed using the percentage formula. The results of the study, based on internal motives who answered "Yes" obtained a score of 681 or 85.125, and those who answered "No" obtained a score of 119 or 14.875%. and the results based on external motives who answered "Yes" obtained a score of 695 or 86.875% and those who answered "No" obtained a score of 105 or 12.5%. In conclusion, external motives play a very important role in exercising at Kambang Iwak Palembang City by obtaining a higher score of 86.875%.
Keywords: Community Exercise Motive
Aktivitas Fisik Mahasiswa Pendidikan Kepelatihan Olahraga selama Pandemi COVID-19
Authors: Romadhoni Wiga Nurlatifa , Nasuka Nasuka , Candra Adiska Rani Ditya , Priambodo Erwin Nizar 
Published: September 2022

This study aims to evaluate and at the same time determine the level of physical activity of students in the Sports Coaching Education Study Program using the International Physical Activity Questionnaire (IPAQ). This research is a descriptive study, where this research is used to explain the data collected in the form of data regarding the level of physical activity. The instrument used is a questionnaire from the International Physical Activity Questionnaire (IPAQ). The sample used was 124 students from the 2019 & 2020 classes. This study used a purposive sampling technique in taking research samples. The results show that for the 2019 batch of a total sample of 59, 37.2% of students have a classification of physical activity levels in the high category, 47.5% have moderate/moderate physical activity results and 15.3% have low physical activity results. /low. Meanwhile, for the class of 2020 students with a total sample of 65, 60% of the students were classified as having a high level of physical activity, 18.5% had moderate/moderate physical activity results and 21.5% had low/low levels of physical activity. In conclusion, based on the results of this study, COVID-19 is not an obstacle for students to continue to carry out physical activities during the ongoing COVID-19 pandemic.
Keywords: COVID-19, , IPAQ, Physical Activity, Students,
Perbandingan antara Latihan Zig-Zag Run dan Shuttle Run Terhadap Kemampuan Dribbling pada Kegiatan Ekstrakurikuler Sepakbola SMA Negeri 2 Lubuklinggau
Authors: Arpansyah Arpansyah , Sukasno Sukasno , Syafutra Wawan 
Published: September 2022

Abstract
This study aims to determine the difference in the effect of zig-zag run and shuttle run training on the dribbling ability of soccer extracurricular participants at SMA Negeri 2 Lubuklinggau. This study used an experimental method using two groups that received different treatments. Experimental group A with zigzag run treatment and experimental group B with shuttle run treatment. The population is all participants of the football extracurricular at SMA Negeri 2 Lubuklinggau totaling 20 people. The sampling technique was divided into two groups by simple random sampling. The research data collection used a soccer zig-zag dribbling test. The data analysis technique used the steps of normality test, homogeneity test, and t test. The results of the pretest data analysis tcount < ttable that is 1.894 <2.82 and all data are homogeneous. It can be concluded that Ho is accepted and Ha is rejected. The results of the post-test data analysis tcount > ttable that is 3.649> 2.82. The conclusion is that there is a significant difference in dribbling ability in soccer games between students who take part in the zig-zag run and shuttle run training in soccer extracurricular activities at SMA Negeri 2 Lubuklinggau.
Keywords: Dribbling, Shuttle run, Soccer, Zig-zag run.
Pengaruh Media Audio Visual terhadap Kemampuan Teknik Dasar Smash Permainan Bulu Tangkis Siswa Sekolah Menengah Kejuruan
Authors: Windary Windary , Rahayu Ega Trisna 
Published: September 2022

ABSTRACT

This study aims to determine the effect of audiovisual media on improving the ability to perform basic smash techniques in badminton. This study uses a one-group pretest-posttest design. This research implements audiovisual media in learning basic smash techniques. The subjects used in the study were Vocational High School students with 18 people consisting of 7 students and 11 students with an average age of 16 years. Data collection techniques used pre-test together with post-test, analyzed using t-test. This study indicates an increase in using audiovisual media, namely the with the Shapiro-Wilk test > 0.05; it can be interpreted that the data is usually distributed and the results of the calculation of the paired sample test obtained sig. (2-tailed) of 0.00 where if sig. (2-tailed) <0.05, it is stated that there is a significant effect. The conclusion is that audiovisual media is very influential in improving the ability to perform basic smash techniques in badminton.
Keywords: Audio Visual Media, Smash Basic Techniques. Vocational High School Students
Pengembangan Pembelajaran Berbasis Aplikasi Mobile pada Materi Sepak Bola
Authors: Prima Agung Uji , Herpratiwi Herpratiwi , Fitriawan Helmi , Katili Muhamad Rifai 
Published: September 2022

Penelitian bertujuan untuk melihat pengembangan pembelajaran berbasis aplikasi mobile pada materi sepak bola. Penelitian ini merupakan penelitian pengembangan dengan desain penelitian Research and Development (R&D) menggunakan Model Hannafin and Peck. Model pengembangan tersebut terdiri dari 4 tahap yaitu tahapan analisis kebutuhan, tahap desain, tahap pengembangan dan implementasi. Pengumpulan data dilakukan dengan cara observasi, wawancara, penyebaran kuesioner menggunakan google form, dan dokumentasi. Hasil penelitian bahwa persentase hasil capaian KKM siswa sebelum menggunakan aplikasi 15%, sedangkan setelah menggunakan aplikasi mengalami peningkatan capaian KKM sebesar 69,5% atau meningkat dengan capaian 54,5%, sehingga hasil respon siswa menunjukkan bahwa aplikasi mobile learning berbasis android untuk materi sepak bola menarik dan mudah dipahami. Simpulan, adanya peningkatan capaian KKM dengan menggunakan aplikasi mobile learning berbasis android untuk materi sepak bola.
Kata Kunci : Android , Aplikasi, mobile learning