bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical simulation analysis of high-speed asynchronous motor based on Fe-based amorphous alloy and SMC stator
Authors: Zhu Feng , Zhang Jiahao , Wang Jinghui , Zhou Feng , Sun Haibo 
Published: December 2022

Abstract
Due to its unique advantages of small size, high power density, and high efficiency, high-speed asynchronous motor (HSAM) has been widely used in aerospace, high-speed air compressor, and other advanced manufacturing equipment. Based on a developed finite element model validated by a prototype motor testing platform, the influence of stators made of different magnetic materials on the efficiency of the HSAM with a rated speed of 7500 rpm has been systematically investigated. Hereinto, the magnetic materials are silicon steel, Fe-based amorphous alloy, and SMC. Compared with silicon steel, the iron loss of HSAM can be significantly reduced by 91.1% using the stator made of Fe-based amorphous alloy in the frequency range of 0-800 Hz, while the SMC motor exhibits an advantage in lower loss when the frequency over 157.28Hz.
An FSPCA-BP algorithm and its application to aircraft overhaul makespan prediction problem
Authors: Fu Shifeng , Jia Xiaoliang , Huang Mingjun , Chang Xiao 
Published: December 2022

Abstract
The implementation strategy for meticulous production management of aircraft overhaul is facing barriers, such as the lack of an effective method that can achieve accurate prediction of makespan in the whole aircraft overhaul process. In this paper, a novel prediction method for makespan of aircraft overhaul by extending feature selection principal component analysis (FSPCA) and backpropagation (BP) neural network (FSPCA-BP) is proposed. Firstly, the FSPCA algorithm is developed to achieve feature selection and dimension reduction simultaneously. Then, the principal components factors obtained from the FSPCA algorithm are used as the input vectors for the BP neural network to predict the makespan of aircraft overhaul. Finally, the proposed method is demonstrated and tested in an application scenario of a partner company and is further compared with PCA-BP and BP approaches, respectively. The result shows that the FSPCA-BP approach has higher accuracy than PCA-BP and BP approaches in aircraft overhaul makespan prediction. Finally, the managerial implications of the proposed method for shop-floor departments are discussed in detail.
AgNWs decorated laser-induced graphene heater for performance enhancement
Authors: Zhu Congcong , Tao Lu-Qi , Zou Simin , Sun Hao , Guo Liangyan , Sang Tianyi 
Published: December 2022

Abstract
Film heaters are attracting growing attention as promising wearable electronic skin for a multitude of applications. Elastomer transfers laser-induced graphene (LIG) is a popular approach to preparing stretchable film heaters; however, they fall short of performance. Here, silver nanowires (AgNWs) were employed to decorate polydimethylsiloxane (PDMS) transferring LIG by using CO2 infrared laser direct-writing technology. This heater’s electrothermal performance was substantially enhanced at different voltages, with a 35.28% enhancement when the voltage was 12 V. And response and recovery times were also improved. The results of repeated heating and cooling cycles also showed long-term reproducibility and reliability. The better performance could be attributed to the strengthened connection between the porous holes after long AgNWs coating on the porous structure of LIG, consequently enhancing the film conductivity. PDMS transferring LIG/AgNws have the extensive potential for future applications in artificial intelligence.
Searches for dark photons at accelerators
Authors: Hearty Christopher 
Published: December 2022

Abstract
Dark sector models attempt to describe observed dark matter properties, as well as other anomalies such as muon (g − 2), possible violations of lepton universality in B decay, and the possible observation of a new particle by the ATOMKI experiment. There is an extensive program of operating and proposed experiments to search for the new, low-mass, feebly-interacting particles predicted by such theories. I will focus on current searches at accelerators for dark photons, a component of many dark sector models. The results are interpreted in a basic model containing dark photons and dark matter.
Lepton Universality Test with MUSE at PSI
Authors: Kohl Michael 
Published: December 2022

Abstract
Lepton universality (LU) typically refers to the lepton coupling, which is considered to be the same for e, μ, and τ leptons, if the interaction is electroweak according to the Standard Model, and it is hence a compelling probe for New Physics. The same principle of universal electroweak lepton interaction leads to the expectation that lepton scattering yields are equal for e and μ beams under the same kinematic condition. The mere mass difference between e and μ affects kinematic quantities (such as the relation between scattering angle and Q
2), and the lepton mass dependence of elastic cross sections for leptons scattered from structured and pointlike objects are taken into account. By comparing e
+, e
−, μ
+, and μ
− scattering yields, two-photon exchange (TPE) effects, universal or not, can be separated from the general LU test of the e/μ yield ratio. With its separable mixed beams of e
+/μ
+ and e
−/μ
−, respectively, the MUSE experiment at PSI is not only designed to measure the proton charge radius with four lepton species, but is also uniquely suited to probe TPE and LU, while benefitting from partial cancellations of certain shared systematics. An overview will be given of the MUSE experiment, the sensitivity, and the present status.
Diagnostic Tests as an Important Pillar in Today’s Physics Learning: Four-tier Diagnostic Test a Comprehensive Diagnostic Test Solution
Authors: Istiyono E 
Published: December 2022

Abstract
This study aims to describe the urgency and development of diagnostic tests starting from the 1-tier test to the 4-tier test. The form of diagnostic tests is always evolving, starting from the 1-tier test (answer only), 2-tier test (answers and reasons), 3-tier test (answers, reasons, and confidence level), up to 4-tier tests (answers, level of confidence in answers, reasons, and level of confidence in reasons). The results of the study show that the more tiers used in the assessment instrument, the more aspects that can be analyzed. The analysis of the 1-tier test depends on the construct of the questions developed. The 2-tier test analysis can be grouped into three categories: understanding concepts, misconceptions, and not understanding concepts. The 3-tier diagnostic test can classify students into six categories, namely; SC, FP, FN, MSC, Lucky Guessing, and LK. Analysis of the four-tier diagnostic test (FTDT) can produce eight or sixteen categories. However, the optimal analysis of FTDT applies to eight categories, namely; SC, LK type 1, FP, LK type 2, FN, LK type 3, MS and LK type 4. The implication of the research is the optimal diagnostic test for diagnosing students' level of understanding of Physics is FTDT, with an analysis of eight categories. FTDT is more meaningful because the results of the diagnosis are accompanied by suggestions for a follow-up to overcome learning difficulties for each student.
Web Learning Research in Physics Education During the COVID-19 Pandemic
Authors: Prahani B K , Jatmiko B , Amelia T , Pristianti M C , Mahtari S , Uulaa R F R 
Published: December 2022

Abstract
Physics education can be given effectively even in an emergency such as the COVID-19 pandemic with the help of existing technology. This study aims to analyze the trend and contribution of web learning in physics education during the COVID-19 pandemic from 2020 to 2021. The research method used is bibliometric analysis and literature review. This study uses data from Scopus, and the keyword is web learning in physics education, 361 documents were found. Then filtered for 2020-2021 and found 43 documents analyzed using Ms. Excel and VOSViewer. From this research, it can be concluded that: 1) The most widely used keywords are student and website, the country that contributes the most is Indonesia, 2) The most common type of document is conference paper, 3) Web learning research has contribution in physics education including: can improve student learning outcomes, understanding and motivation, web learning can be applied to physics laboratory services. The limitation of this research is that it only uses one database to obtain research data. Future web learning research in physics education needs to be carried out and developed more intensely using other databases besides Scopus.
The Influence of Quantum Teaching Model through the TANDUR Strategy on the Students’ Learning Outcome of Senior High School Students in Static Fluid Materials
Authors: Allo A Y T , Farida I , Sinon I L S 
Published: December 2022

Abstract
This research was conducted to determine the effect of the quantum teaching model through the TANDUR strategy on the cognitive learning outcomes of students and the psychomotor learning outcomes of students in class XI Science before and after treatment using the quantum teaching model through the TANDUR strategy. The instruments used were tests in the form of pretest and posttest to measure cognitive and observation sheets to measure psychomotor. This research method is Experimental Design (pre-experimental), with the research design used as the one group pretest-posttest design strategy. Data analysis using the application Facets, Ms Excel and SPSS 22. The population, namely students of class XI Science YAPIS Manokwari High School academic year 2020/2021, amounts to 16 people. This study's results indicate an influence on the use of quantum teaching models through the TANDUR strategy. The value of psychomotor learning outcomes shows that the influence of the quantum teaching model through the TANDUR strategy can improve learning outcomes in the classroom. Overall students are at very high criteria, 75%-87% and the average value of psychomotor learners’ experience improvement at each meeting. This research implies that students' cognitive and psychomotor abilities have increased significantly, and students enjoy learning physics.
Development of Physics Learning Instrument using Guided Inquiry Model as Effort to Increase Student Learning Result on Dynamic Fluid Learning Material at Senior High School
Authors: Sumo M , Jatmiko B , Supardi Z A I , Arifin S , Nasrullah  , Mukit A 
Published: December 2022

Abstract
This study intends to generate a valid, practical and effective guided inquiry model of Physics learning instruments to increase the results of senior high school students. The learning material was developed based on Kemp with steps: 1) topic and goal, 2) student characteristics, 3) study goals, 4) content, 5) preliminary research, 6) source of learning activities, 7) support service, 8) evaluation. The instrument was tested to eleven grades eleven in the second semester with a pre-experimental one-group pretest-posttest design. Study data was collected through observation, tests and questionnaires. The study revealed that revised learning instruments were valid. Practicability level of learning instrument based on lesson plan practicability were in good category and fulfill the guided inquiry model syntax. Instrument effectiveness could be seen from an Increase in student ability in concept understanding, as shown by N-gain with a high category in 0.81 value; Positive students respond to learning instrument and learning activity, in which 96% responded positively, and 4% responded negatively. Based on the study finding, it was concluded that student learning results shown by student concept comprehension, psychomotor skill, and character that consist of discipline and responsibility increased upon the implementation of learning instrument developed by the guided inquiry model on dynamic fluid learning material. This research implies that the development of physics learning tools will have a positive impact on increasing students' abilities in learning physics on dynamic fluid topics.
Exploring Inquiry Skills During Home Experiments about Science in the Online Instruction
Authors: Supeno  , Ridlo Z R , Setiawan A M 
Published: December 2022

Abstract
Inquiry is an essential skill in science learning which includes designing, conducting, and interpreting the results of scientific investigations. Inquiry skills are usually taught by applying instruction by doing science-based education. Experiments are essential in training students' inquiry skills in science learning. Online science learning is effectively used to teach theoretical or conceptual material and becomes a challenge when applied in education that provides practical experience in the laboratory by involving experiments methods with hands-on exercises. This study tried online science learning by integrating experimental activities using hands-on activities carried out by students in their respective homes. During science lessons, students choose a topic about science and conduct experiments at home. Students design experiments, collect data, analyze data, and formulate conclusions to construct scientific knowledge. The results showed that practical activities carried out at home in online science learning could help students develop their inquiry skills. Students can carry out scientific investigations by applying various inquiry skills to obtain valid scientific knowledge.
Teaching Physics in Scientific Information Disclosure Era Through Daily Physics Learning
Authors: Kristiyanto W H 
Published: December 2022

Abstract
Daily physics is the study of physics that raises problems and applications in everyday human life. This study aims to describe the structure of physics learning in everyday life that supports physics learning in the era of scientific information disclosure and its implementation. This qualitative descriptive research was conducted by examining the structure of everyday physics learning and observing the responses of research subjects with physics and social backgrounds who participated in the daily physics lessons. The results of this study indicate that the structure of learning physics in everyday life is designed to be followed by all participants from both exact and non-exact groups as part of the Whole Person Education program. Subjects with a background in Physics explain daily physics learning followed by discussions based on popular events in everyday life that are studied from the physics side easily and strengthen the understanding of physics concepts that they already have. Subjects with social backgrounds explain daily physics learning, followed by presenting examples that occur in everyday life, such as birthday balloons that can be attached to walls and others. These examples can be easily accepted and understood by all participants. However, participants with social backgrounds find it quite difficult when the discussion enters the discussion of abstractions such as equations and formulas. This research concludes that the structure of everyday physics is very supportive of learning physics for many people in the era of scientific information disclosure.
Two Dimensional Simulation of Electromagnetic Waves on Metal Materials Using the FDTD Method
Authors: Firdaus R A , Khoiro M , Dzulkiflih  , Rahayu V , Mutmainnah  
Published: December 2022

Abstract
It is challenging to picture the physical phenomenon known as electromagnetic wave simulation. The purpose of this work is to model the propagation of electromagnetic waves on a two-dimensional medium. FDTD is a method that is quite relevant to be used in visualizing electromagnetic waves. One can utilise Maxwell's equations to describe discrete electromagnetic waves having TM mode. The simulation is in the form of a Gaussian pulse with the magnetic field H and the electric field E having position and time domains, respectively. The proposed simulation conditions have considered the program's boundary conditions and numerical stability. The differential equation method methodology is used in the FDTD method. The simulation results show that the wave without PML is impeccably reflected, and with PML, the wave is reflected by the material utilized. Materials with high conductivity will make the waves decay and reduce their intensity. This research can be used in the investigation of materials and communication media innovation.
Improving Critical Thinking Skills (CTS) of Students Through Wave Energy Learning Project (WELP) on Environmental Physics Lecture
Authors: Satriawan M , Rosmiati R , Saputra O , Habibbulloh M 
Published: December 2022

Abstract
This study aims to encourage the critical thinking skills (CTS) of students through the Wave Energy Learning Project (WELP) program, which is applied with an early-assisted project-based learning model (EA-PjBL) in Environmental Physics lectures. The research focuses on the topic of the environment as a renewable energy source, especially ocean wave energy. In the WELP program, there is a prototype of ocean wave energy that has been developed as a teaching aid and an initial project model that pre-service physics teachers will develop. The data collection instrument used was a description test of the concept of ocean wave energy based on CTS, performance and product assessments, peer performance assessments, lecture observation sheets, and pre-service physics teachers’ perception sheets. The research subjects were 31 pre-service physics teachers in the sixth semester of the Physics Education study program at one of the academic staff education institutions in West Nusa Tenggara. The research data were analyzed using descriptive statistics, N-gain test, t-test, and effect size analysis. The data analysis results show a strong influence on the use of the WELP program through the EA-PjBL learning model on improving the CTS of pre-service physics teachers. The CTS of pre-service teachers has increased by category after attending lectures using the WELP program. This research implies that the WELP program developed can be a model for developing lecture programs on other renewable energy materials that enhance the development of higher-order thinking skills. The project in this research triggers the younger generation to contribute to overcoming the global electrical energy crisis.
Low-temperature heat transfer and stress analysis of LNG loading arm pipeline supports
Authors: Li Meng , Zhou Yi , Yu Bo , Shi Guang Zhi , Xia Hua Bo 
Published: December 2022

Abstract
The pipeline support is a complex component structure in liquefied natural gas (LNG) loading arm. In order to study the impact of ultra-low temperature conditions on the mechanical performance of pipeline brackets, the heat transfer analysis and thermal stress calculation of the pipeline support of the LNG loading arm are carried out under low-temperature conditions in this paper. Based on the principle of steady-state heat transfer, the finite element method is used to study the sensitivity of ambient temperature to heat transfer results of pipe support, the results show that the heat dissipated by the duct support is proportional to the temperature difference. The temperature field distribution of the pipe-bundle rib on the duct support under ice-free and ice-covered conditions is analyzed, and two different paths are selected to study the temperature distribution law of the structure, and the conclusion that the ice has the effect of cooling is drawn. Finally, based on the temperature field distribution results obtained by the heat transfer analysis, the low-temperature stress analysis of the pipe support is carried out. According to the thermal stress results, the corresponding improvement measures are proposed. It provides some guidance for the structural design of the loading arm.
Study on the Vibration Characteristics of the Spraying Needle Excited by Electro-hydraulic Source Based on Luminous Energy Method
Authors: Liu Jian-he , Yan Chen-yang 
Published: December 2022

Abstract
When one kind of liquid was atomized by a metal needle in the electric field, violent vibration of the spraying needle could be observed clearly, and the atomizing stability was affected by it seriously. To explore the cause of the needle’s vibration and weaken its negative effect, an optical energy method was adopted and some characteristics of the vibration were investigated. The principle of the optical energy method was very simple, it was just a transformation from mechanical information of the needle’s vibration to an optical signal composed with luminous energy features and received by a photodiode. The prototype of it was composed by a luminous source system and a testing circuit cored with MCU STC89C52. After the electronic signal transferred from the luminous energy was analysed, some characteristics come from different needles under different working conditions can be obtained. Some results are: the cause of the vibration comes from dual incentives of the electrostatic field and the atomized liquid jet, in view of mechanical structure, the length and diameter of the spraying needle was the main factors affecting the vibration amplitude and frequency, considering the flow rate flow through the spraying needle, there are different starting vibration voltages for different flow rate at the same length and diameter.
Orderly charging strategy for electric vehicles based on carrier wave communication
Authors: Lv Linjun , Zhang Zhaoyun , Jia Peiru 
Published: December 2022

Abstract
To solve the problem of the poor wireless signal in the use of charging piles in residential communities, this paper proposes a communication method using a power line carrier in the community charging system to achieve safe and reliable data communication. And the problem is that a large number of electric vehicles charging in a disorderly manner leads to an increase in the total peak load of the grid and affects the safe operation of the grid. In this paper, we propose to develop a suitable orderly charging plan to ensure the safe operation of the grid, with the least electricity price as the optimization target, and combined with V2G technology. The users are guided to charge during the valley period of electricity consumption, and when the grid operation load is too high, the grid operation pressure is linked by discharging electric vehicles to the grid. This strategy takes into account the security of the grid and the economy of the users, and to a certain extent, realizes the purpose of grid scheduling is to cut the peaks and fill the valleys, avoiding the sudden load change
Design of Electric Bicycle Charger Protection Device Based on Anti-Electrode Reverse Connection Technology
Authors: Qiu Xiaoyun , Li Xiaobai 
Published: December 2022

Abstract
According to studies, electric bicycles are used in large numbers in ancient villages as the main means of transportation. Electric bicycles are the primary source of fire risk in old villages, where the majority of houses are huge, fire-prone timber and brick constructions. In this paper, an electric fire safety device for electric bicycle chargers based on anti-electrode reversal technology is devised in order to avoid electrical fires produced by electric bicycle chargers. First, based on statistical data, the primary reasons why electric bicycle chargers catch fire are introduced. Then, the software design scheme of the system is built, and the architectural form of the electrical fire prevention device for electric bicycle chargers and related circuits is designed for the sources of fire. The created protection device can manage battery charging by observing the charging voltage to prevent the fire produced by thermal runaway of the battery as a result of overcharging. It can also protect the charger from burning caused by battery reversal during charging.