bluuebunny/crossref_metadata_2025_split huggingface dataset:
New Method of Generating Robot Trajectory on Complex Geometric Workpiece
Authors: Cai Z. , Deng S. , Liao H. , Coddet C. , Zeng C. 
Published: November 2022

Abstract
Off-line programming technology is frequently used in advanced robot assisted thermal spraying process, such as ABB RobotStudio, which offers excellent functions to simulate the real working environment of robot in order to test the robot trajectory. It also provides the add-in programs to make the simulation easier. ANSYS is an engineering simulation software which offers the function of modeling analysis with grids. The mesh on the surface of workpiece represents a layer with good coverage that can be the reference to create robot trajectory on it. This study provides a new ideal to combine those two technologies (or software) in order to realize the auto-generation of the robot trajectory for thermal spraying. Based on the function of the add-in program, we can transfer the data between RobotStudio and ANSYS using C# programming and then create the trajectory according to the operation parameters. Some experiments have shown that this method can effectively reduce the time required for robot programming.
Shock-Wave Induced Spraying: Modeling and Physics of a New Spray Process
Authors: Karimi M. , Rankin G. W. , Jodoin B. 
Published: November 2022

Abstract
The Shock-wave Induced Spray Process (SISP) is a method of applying coatings of various metallic-based materials onto a wide range of different substrates. It utilizes the kinetic and thermal energy induced by a moving shock-wave to accelerate and heat powder particles. A transient axisymmetric model for the process is developed using Fluent. The model is validated with reference to a simplified one-dimensional approximation of the flow field. Values of pressure, axial velocity, Mach number, as well as static and total temperature are carefully examined. It is found that a zone develops in the flow that experiences elevated levels of temperature and velocity simultaneously. This is the main distinction between SISP and traditional CGDS processes. The effects of varying supply pressure and temperature on these flow variables are investigated in detail. Additionally, the effect of changing the driving gas type is investigated using air and helium as examples.
An Improvement of Low Power Plasma Torch for Very Low Pressure Plasma Sprayed Thin and Dense Ceramic Coatings
Authors: Zhu L. , Zhang N. , Sun F. , Bolot R. , Planche M. P. , Liao H. , Coddet C. 
Published: November 2022

Abstract
As a promising thermal spray technology, the very low pressure plasma spray (VLPPS) process has been significantly used to deposit thin, dense and homogenous ceramic coating materials for special application needs in recent years. In this study, a home-made transferred arc nozzle was mounted on a low power F100 plasma torch for enhancing the plasma jet energy under very low pressure conditions. Thin and dense alumina (Al2O3) and yttria-stabilized zirconia (YSZ) ceramic coatings with an average thickness of 30-40 µm were successfully elaborated by VLPPS process below 1 mbar. Optical emission spectroscopy (OES) was used to analyze the properties of the plasma jet with or without powder injection. The microstructures of the coatings were observed by means of scanning electron microscopy (SEM). It was found that the YSZ coatings displayed a bimodal microstructure that was composed of splats formed by melted particles and a little amount of vapor condensation from evaporated particles. However, vapor condensation could not be observed in the Al2O3 coatings formed by lamellar splats only. The Vickers microhardnesses of both coatings were also evaluated.
Particle Size Distribution of the Filling Powder in Cored Wires and their Effect on Arc Behavior, In-Flight Particle Behavior and Splat Formation
Authors: Tillmann W. , Abdulgader M. 
Published: November 2022

Abstract
The composition of the cored wires is inhomogeneous and contains solid velum as well as a powder filling which strongly influences the particle formation, in-flight particle behavior, the coating microstructure, and consequently the behavior of the desired coating. To study the effect of particle size distribution of the filling powder in cored wires the parameters of the twin wire arc spraying process such as current, voltage, and atomization air pressure are changed for different intervals of particle size distributions (-45µm+25µm, and -95µm+63µm). Fluctuations in arc voltage and current are measured and found to be higher at smaller particle sizes. The characteristics of inflight particles showed a higher particle velocity in case of smaller particle sizes. The particle temperature is higher in case of bigger particle sizes. The splats tend to form a pancake shape in case of smaller particle sizes. Therefore, the lamellas are more homogenous and the porosity is low. This investigation is important for deep understanding of twin wire arc spraying with cored wires.
Modeling of Dry-Ice Blasting and its Application in Thermal Spray
Authors: Dong S. , Song B. , Hansz B. , Liao H. , Coddet C. 
Published: November 2022

Abstract
Dry-ice blasting, as an environmental-friendly method, was used during atmospheric plasma spraying for improving coating properties. This process is believed to be capable to reduce the porosity and the oxide of the coating and to increase the deposition efficiency, etc. Considering dry-ice pellets are carried and accelerated by compressed air through a convergent-divergent nozzle, the computational fluid dynamic (CFD) approach was firstly employed in this study to evaluate the effects of nozzle geometry, accelerating gas conditions as well as properties of pellets, on the pellet velocity variation and further to optimize the process. Moreover, the experiment with a steel powder was then carried out and the results indicate that a denser coating with a lower content of oxide can be achieved with the application of dry-ice blasting during the plasma spraying.
Hot-Gas Corrosion-Erosion Resistance of Thermally Post-Treated Fe-Al-Based Arc-Sprayed Coating
Authors: Pokhmurska H. , Wielage B. , Prokopyshyn A. , Winkelmann R. 
Published: November 2022

Abstract
Solid-particle erosion of metals and alloys at elevated temperatures is one of the main reasons of the damage of components used in the energy production and utilization industries. Application of protective coating systems can be an attractive and economically reasonable solution for preventing the failure and increasing the durability of the components working in severe conditions of high-temperature corrosion and erosion. However, thermal spraying of intermetallic materials that have excellent high-temperature corrosion resistance is limited because of their low ductility. Present work reports the results of the investigation of abrasion wear resistance at elevated temperatures of combined coatings, which include the intermetallic layer. Such iron aluminide layers have been formed as a result of diffusion during the heat post-treatment of arc-prayed metallic coatings combining Fe- and Al-based layers. Post-treatment of arc-sprayed coatings was carried out by means of infrared radiation and induction heating. It was shown that the abrasion resistance of the developed coating tested at elevated temperatures (T &gt; 500 °C) is considerably higher than that of low-alloyed steel and some nickel-based alloys and depends on the test load condition. The high performance of intermetallic-based graded coatings at elevated temperatures makes them interesting for applications as a low-cost erosion-corrosion-resistant material.
Life Cycle Assessment of Thick Coating Processes
Authors: Serres N. , Costil S. , Langlade C. , Coddet C. 
Published: November 2022

Abstract
In this work, a LCA based on Eco-indicator 99 methodology was used to compare the environmental impacts and benefits of thermal spraying (including APS, HVOF, Flame and Cold Spray) carried out with materials which could be used in application to resist against wear and/or corrosion. The comparison was carried out using the SimaPro 7.2 software, and it was focused on all stages necessary to build the coating, i.e. extraction of raw materials, production of powder, transport, surface preparation, thermal spray operating, until the end of life, as well as emissions (solid, liquid and gaseous) at each stage of a process. As a major result, it appears that the lifetime of the coatings plays a high role. If a coating needs to be regularly replaced or if failure of the coating decreases the lifetime of the component, this almost impact on the LCA. Moreover, there is an influence on the nature of the resources used to build the coating, as well as on the end of life strategies.
Thermal Spray: Status and Current Activities in Norway
Authors: Armada S. , Bjørgum A. 
Published: November 2022

Abstract
Norway is a rich country endowed with many natural resources including hydropower, oil and gas, wind power, fish, etc. Norway has nowadays a high technological and research based industry. The discovery of the first oil field in 1969 has been the driving force for the Norwegian economy, accounting for nearly 50% of exports and 30% of state revenue. Since then several technology-based industries have been created and developed not only around the oil and gas business, but also in other fields such as the Aluminium production. Thermal Spray has played an important role in the Norwegian industry, where it has been used for more than 40 years in many different applications (corrosion and wear protection in the offshore industry, aeronautical industry, etc). The Norwegian thermal spray producers and users have a long tradition in collaborating and also working with R&D institutes such as SINTEF and Universities (specially the The Norwegian University of Science and Technology, NTNU) in order to develop new and better coatings. Based on this collaboration the Norwegian Thermal Spray Group was established in 1995 and since then it has grown constantly. The members of the group are: Bandak AS, Castolin Services, CerPoTech, GBSGroup, HCStarck, Mantena, Mets AS, Norwegian armed force logistic division (LHK), Powder Tec AS, Scana, SprayService AS, SubseaDesign, Teknologisk Institute, Trio AF, Volvo Aero Norge, SINTEF and the Norwegian University of Science and Technology. The group includes materials suppliers, coating producers, end users, education and certifying, research institutes and Universities. The aim of the group is to develop thermal spray activities in Norway and find new solutions for existing and new challenges in surface protection.
RANCANG BANGUN ALAT FERMENTOR KOPI TERKENDALI MENGGUNAKAN ELEMEN PEMANAS BERBASIS ARDUINO UNO
Authors: Fasya Fadhilah , Prihandono Trapsilo , Harijanto Alex 
Published: November 2022

ABSTRAKPenelitian ini bertujuan untuk merancang alat fermentor kopi terkendali menggunakan elemen pemanas berbasis Arduino uno. Metode dalam penelitian ini menggunakan metode penelitian kuantitatif deskriptif. Variabel penelitian yang digunakan pada penelitian ini adalah rancang bangun alat fementor kopi terkendali menggunakan elemen pemanas berbasis Arduino uno. Dalam rancang bangun alat ini menggunakan 2 jenis sensor yaitu sensor DS18B20 dan sensor DHT 11. Untuk mengetahui tingkat kevalidan sensor tersebut maka untuk sensor DS18B20 diuji dengan thermometer dan untuk sensor DHT11 diuji dengan hygrometer. Hasil analisis tingkat kevalidan alat untuk sensor DS18B20 didapatkan tingkat kevalidannya sebesar 84,5% dan untuk sensor DHT11 tingkat kevalidannya 91,5%. Dengan demikian rancang bangun alat fermentor kopi terkendali menggunakan elemen pemanas berbasis Arduino uno adalah sangat valid. Kata kunci: kopi arabika; fermentasi kopi; arduino uno. ABSTRACTThis study aims to design a controlled coffee fermenter using an Arduino uno-based heating element. The method in this study uses descriptive quantitative research methods. The research variable used in this study is the design of a controlled coffee fementer using an Arduino Uno-based heating element. In the design of this tool, 2 types of sensors are used, namely the DS18B20 sensor and the DHT 11 sensor. To determine the level of validity of the sensor, the DS18B20 sensor is tested with a thermometer and the DHT11 sensor is tested with a hygrometer. The results of the analysis of the validity level of the tool for the DS18B20 sensor obtained a validity level of 84.5% and for the DHT11 sensor the validity level is 91.5%. Thus the design of a controlled coffee fermenter using an Arduino uno-based heating element is very valid. Keywords: arabica coffee; coffee fermentation; arduino uno.
PENGARUH PAPARAN MEDAN MAGNET EXTREMELY LOW FREQUENCY (ELF) TERHADAP MASSA JENIS TOMAT RANTI
Authors: Rahman Rosdiana Afifah , Sudarti Sudarti , Lesmono Albertus Djoko 
Published: November 2022

ABSTRAKTomat ranti merupakan jenis tomat yang memiliki kandungan likopen serta vitamin c yang lebih tinggi dibanding dengan jenis tomat yang lain. Tomat ranti merupakan salah satu jenis buah klimaterik dengan umur simpan ± 3-7 hari. Medanmagnet ELF merupakan salah satu jenis dari gelombang elektromagnetik yang bersifat Non-Ionizing dan telah dinyatakan dalam beberapa penelitian dalam bidang pangan, pertanian dan lain sebagainya. Penelitian ini bertujuan untuk mengetahui pengaruh paparan medan magnet ELF dengan intensitas 600 µT, 1000 µT, dan 1500 µT terhadap perubahan nilai massa jenis tomat ranti pada kelompok kontrol dan kelompok eksperimen. Desain penelitian yang digunakan yaitu Rancangan Acak Lengkap (RAL) dengan sampel yang digunakan yaitu tomat ranti. Sampel dibagi menjadi 5 kelompok kontrol dan 45 kelompok eksperimen. Pengukuran nilai massa jenis dilakukan pad ahari ke-2, ke-4, ke-6, dan ke-8 setelah pemaparan. Hasil dari penelitian menunujukkan adanya perbedaan signifikan antara kelompok kontrol dengan kelompok eksperimen. Intensitas dan waktu pemaparan yang paling efektif dalam penelitian ini yaitu intensitas 600 dengan lama waktu 100 menit. Kata kunci: tomat ranti; massa jenis; medan magnet; elf; pembusukan. ABSTRACTRanti tomato is a type of tomato that contains lycopene and vitamin C which is higher than other types of tomatoes. Ranti tomato is a type of climacteric fruit with a shelf life of ± 3-7 days. The ELF magnetic field is one type of electromagnetic wave that is Non-Ionizing and has been stated in several studies in the fields of food, agriculture and so on. This study aims to determine the effect of exposure to the ELF magnetic field with an intensity of 600 µT, 1000 µT, and 1500 µT on changes in the density value of ranti tomatoes in the control group and the experimental group. The research design used is Completely Randomized Design (CRD) with the sample used is tomato ranti. The sample was divided into 5 control groups and 45 experimental groups. Density values were measured on the 2nd, 4th, 6th, and 8th days after exposure. The results of the study showed a significant difference between the control group and the experimental group. The most effective intensity and exposure time in this study was the intensity of 600 with a duration of 100 minutes. Keywords: ranti tomato; density; magnetic field; elf; decay.
ANALISIS ASPEK LITERASI SAINS PADA BUKU TEMATIK PEMBELAJARAN IPA KELAS VI DI SD NEGERI 2 CEMPAGA TAHUN 2022
Authors: Dewi Ni Luh Widya Antika , Putra I Ketut Dedi Agung Susanto 
Published: November 2022

ABSTRAKPengetahuan tentang aspek literasi sains penting bagi siswa untuk memahami isu-isu lingkungan, ekonomi dan sosial yang baru. Salah satu upaya untuk meningkatkan literasi sains adalah analisis buku teks IPA tematik. Penelitian ini menganalisis aspek literasi sains pada buku teks IPA bertema kelas VI di sekolah dasar. Aspek literasi sains yang akan dianalisis adalah sains sebagai cara berpikir dan interaksi antara sains, teknologi, dan masyarakat. Penelitian yang digunakan adalah deskriptif, yaitu mengumpulkan informasi dalam bentuk penelitian dokumenter. Satu buku utuh dianalisis dan representasi yang berbeda dari literasi sains dibangun, yaitu: 0,2% (Ilmu dari Perspektif Berpikir) dan 0,7% (Ilmu Pengetahuan, Teknologi, dan Perspektif Interaksi Masyarakat). Masing-masing bab menyajikan kedua aspek tersebut secara lebih rinci.Pengamatan berikut menunjukkan bahwa buku ini tidak menekankan penguasaan dukungan materi dan konteks. Kata kunci: literasi; sains; tematik. ABSTRACTKnowledge of aspects of scientific literacy is important for students to understand new environmental, economic and social issues. One of the efforts to improve scientific literacy is the analysis of thematic science textbooks. This study analyzes aspects of scientific literacy in science textbooks with the theme of class VI in elementary schools. The aspect of scientific literacy that will be analyzed is science as a way of thinking and the interaction between science, technology, and society. The research used is descriptive, namely collecting information in the form of documentary research. One whole book was analyzed and different representations of scientific literacy were constructed, namely: 0,2% (Science from Thinking Perspective) and 0.7% (Science, Technology, and Community Interaction Perspective). Each chapter presents these two aspects in detail showing that this book does not control material and context support. Keywords: literacy; sains; thematic.
PENGARUH MEDIA PEMBELAJARAN PhET SIMULATION TERHADAP HASIL BELAJAR SISWA SMA NEGERI PLUS SUKOWONO MATERI USAHA DAN ENERGI TAHUN PELAJARAN 2021/2022
Authors: Subiki Subiki , Hamidy Ahmad Nor , Istighfarini Elma Tri , Suharsono Ferdy Yusril Hikam , Putri Sheika Fatma Diana 
Published: November 2022

ABSTRAKKemajuan teknologi dan informasi yang semakin pesat mengharuskan semua orang untuk dapat beradaptasi dengan berbagai teknologi yang ada. Termasuk profesi guru yang merupakan tombak kemajuan pendidikan di suatu negara. Guru harus bisa mengikuti perkembangan zaman dan menciptakan inovasi pembelajaran yang menarik, efektif, dan efisien bagi siswa. Salah satu pemanfaatan teknologi di bidang pendidikan adalah Physics Education and Technology (PhET) Simulation. Simulasi PhET merupakan sebuah laboratorium virtual yang sangat bermanfaat terutama dalam pembelajaran sains seperti fisika, biologi, matematika, dan kimia. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan simulasi PhET terhadap hasil belajar siswa pada materi usaha dan energi. Populasi dari penelitian ini adalah siswa kelas XI IPA di SMAN Plus Sukowono. Data yang di analisis adalah hasil Pre-test dan Post-test yang akan disajkan menggunakan diagram batang berbantuan excel dengan menggunakan metode eksperimen yang terdiri atas kelas kontrol dan kelas eksperimen. Hasil penelitian menunjukkan bahwa penggunaan Phet Simulation sebagai media pembelajaran materi usaha dan energi berpengaruh dalam meningkatkan hasil belajar siswa kelas XI IPA di SMAN Plus Sukowono yang ditunjukkan dari selisih nilai rata – rata antara pre test dan post test kelas eksperimen sebesar 9,28. Kata kunci: simulasi PhET; pengaruh; usaha dan energi ABSTRACTAdvances in technology and information that are increase rapidly require everyone to be able to adapt to various existing technologies. Including the teaching profession which is the spearhead of educational progress in a country. Teachers must be able to keep up with the times and create interesting, effective, and efficient learning innovations for students. One of the uses of technology in education is Physics Education and Technology (PhET) Simulation. PhET Simulation is a virtual laboratory that is very useful especially in learning sciences such as physics, biology, mathematics, and chemistry. This study aims to determine the effect of using PhET simulation on student learning outcomes in the matter of work and energy. The population of this study were students of class XI IPA 1 at SMAN Plus Sukowono. The data analyzed are the results of the Pre-test and Post-test which will be presented using an excel-assisted bar chart. Keywords: PhET simulation; impact; effort and energy
Pengaruh Penggunaan Lembar Kegiatan Peserta Didik Berbasis Model APOS Berbantuan Geogebra Terhadap Keterampilan Berpikir Kritis Matematika
Authors: Istikomar Istikomar , Hanifah Hanifah , Sumardi Hari 
Published: November 2022

The purpose of this research is to determine the effect of using student activity sheets based on the Geogebra-assisted APOS model on mathematical critical thinking skills in quadrilateral material in class VII SMP Negeri 1 Bengkulu Selatan. The research design used is a quasi-experimental design with a population of all seventh-grade students at SMP Negeri 1 Bengkulu Selatan. The sample technique research used is a random sampling technique, to obtain a sample group in the activity of 2 classes, namely the experimental class and the control class. This study uses an instrument in the form of a pretest and a posttest in the form of an essay that has been tested. After doing the research, the average obtained from the post-test results for the experimental class was 82.17 and the average post-test results for the control class was 70.74. These results were obtained from the results of hypothesis testing with the ANCOVA test using SPSS21 software with = 0.05. From this test, sig(0.000) < 0.05 was obtained so that there was a significant effect of using the APOS model-based student activity sheet which was assisted by Geogebra on the ability to think critically in mathematics.
Обґрунтування раціонального розподілу пунктів спеціальної обробки на маршрутах руху в разі зруйнування об’єкту атомної енергетики
Authors: Nikitin Anatolii , Vorobiov Oleh , Partalian Andrii , Kurtseitov Tymur , Romaniuk Valentyn , Ivashchuk Oleksandr 
Published: November 2022

Мета роботи: визначення раціонального розподілу пунктів спеціальної обробки на маршрутах руху населення та техніки у разі зруйнування об’єкту атомної енергетики із врахуванням ступеня завантаження шляхів переміщення зараженої техніки та населення з районів можливого радіаційного зараження.
Дизайн/Метод: метод максимального елементу.
Результати дослідження: методика розрахунку раціонального розподілу пунктів спеціальної обробки на маршрутах руху населення та техніки у разі зруйнування об’єкту атомної енергетики.
Теоретична цінність дослідження: основними результатами досліджень за тематикою статті є методика розрахунку раціонального розподілу пунктів спеціальної обробки на маршрутах руху населення та техніки у разі зруйнування об’єкту атомної енергетики.
Тип статті: описовий та розрахунково-аналітичний.
Методичний підхід щодо оцінювання рівня організації підготовки у Збройних Силах України
Authors: Heorhadze Oleksandr , Repilo Iurii , Kurtseitov Tymur , Mykus Serhii , Khoma Vitalii 
Published: November 2022

Мета роботи: Розкриття суті методичного підхіду щодо оцінювання рівня організації підготовки у Збройних Силах України.
Метод: аналіз, експертне опитування.
Теоретична цінність дослідження: основними результатами дослідження за тематикою статті є методичний підхід щодо оцінювання рівня організації підготовки у Збройних Силах України.
Практична цінність дослідження: запропонований методичний підхід дозволяє оцінити рівень організації підготовки сил оборони.
Цінність дослідження: використовуючи зазначену методику, суб’єкти підготовки отримують можливість провести необхідні розрахунки, надати обґрунтовані пропозиції керівникам військових організаційних структур для прийняття рішення на організацію підготовки.
Тип статті: теоретичний, практичний.