bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effective inhibit energetic cost in stimulated Raman shortcut-to-adiabatic passage
Authors: Zhang Feng-Yang , Feng Zhi-Qing , Li Chong 
Published: January 2021

Abstract
A shortcut to the adiabatic process is an effective method for quantum information processing. The fast and robust quantum information transfer can be implemented by this method. The energetic cost is an important measurement for the shortcut. In this paper, we investigate how to inhibit the energetic cost in stimulated Raman shortcut-to-adiabatic passage in a three-level system. The energetic cost can be manipulated by adjusting detuning of the system and the energetic cost takes the minimum with one-photon resonance condition.
Steady state versus pulsed tokamak reactors
Authors: Segal D.J. , Cerfon A.J. , Freidberg J.P. 
Published: January 2021

Abstract
We have carried out a detailed analysis that compares steady state versus pulsed tokamak reactors. The motivations are as follows. Steady state current drive has turned out to be more difficult than expected—it takes too many watts to drive an ampere, which has a negative effect on power balance and economics. This is partially compensated by the recent development of high temperature REBCO superconductors, which offers the promise of more compact, lower cost tokamak reactors, both steady state and pulsed. Of renewed interest is the reduction in size of pulsed reactors because of the possibility of higher field Ohmic transformers for a given required pulse length. Our main conclusion is that pulsed reactors may indeed be competitive with steady state reactors and this issue should be re-examined with more detailed engineering level studies.
Preliminary FLUKA simulations of the Changvan Neutron Monitor
Authors: Fongsamut K , Jiang P , Nuntiyakul W , Sáiz A , Ruffolo D , Mangeard P S , Evenson P , Munakata K , Madsen J , Chuanraksasat P , Soonthorntham B , Komonjinda S , Macatangay R 
Published: January 2021

Abstract
A neutron monitor (NM) is a ground- (or sea-) based detector of the flux of cosmic ray particles in space. The high-energy cosmic rays in the GeV primary range interact in the upper atmosphere, producing a cascade of subatomic particles, some of which reach Earth’s surface. A neutron monitor is mostly sensitive to the neutron component of the atmospheric cascade. The standard-design neutron monitor (NM64) contains lead, the nuclei of which fragment when struck by a high-energy particle. Some of the fragments are neutrons which are moderated and trapped by polyethylene acting as a reflector and moderator. These neutrons can then be detected by induced nuclear fission of 10B in a 10BF3 gas proportional counter. The Changvan neutron monitor is a portable neutron monitor assembled in Thailand and housed in a standard insulated shipping container to conduct long-term research in polar regions. There are three proportional counters in the Changvan, but the central counter lacks the lead producer. Since the detector has a non-standard semi-leaded design, we examine the detection efficiency of the Changvan for neutrons and other atmospheric secondary particles. We are also developing an electronic board and a highly sensitive control module to reduce dead time to a minimum, for monitoring neutrons in the GeV energy range. Simulation results accounting for the dead time will also be reported.
Monte Carlo simulation of a satellite-based detector of cosmic ray ions with elemental separation from hydrogen to nickel
Authors: Onpeang Punyaporn , Ruffolo David , Chaiwongkhot Kullapha 
Published: January 2021

Abstract
Observing cosmic rays and solar energetic particles provides important information about the solar wind and solar storms. We are working toward building a Thai detector of energetic ions from space that is inspired by the Mass Spectrometer Telescope (MAST), a satellite-based detector installed on SAMPEX of cosmic ray ions with the energy range of 0.01 to 0.5 GeV/nucleon with the objective to determine the nuclear charge and kinetic energy for nuclei with atomic number of Z = 1 (hydrogen) to 28 (nickel). The energy range of the detector covers the energy range of anomalous cosmic rays, Galactic cosmic rays and solar energetic particles. Therefore, observations by such a detector can provide insight into the origin and transport of these ions in cosmic rays and solar energetic particles. During solar events, measurements of the elemental composition of solar energetic particles can be compared with the composition of the solar corona. We have created a computational model of the MAST detector to simulate ion detection using the FLUKA program to measure the energy deposition of heavy ions in multiple detector components to determine their initial kinetic energy in the simulation. From the simulation results, we can identify the ions’ energies and species using established methods and calculate the geometry factor of the detector, comparing the results with previous reports.
Low-cost external cavity diode laser for cold atom experiments
Authors: Temnuch W , Buathong S , Phearivan P , Deachapunya S 
Published: January 2021

Abstract
In this article, the construction of an external cavity diode laser (ECDL) with the wavelength selection and stabilization given by an interference filter in a cateye reflector mirror type instead of using a common grating Littrow configuration is described. We show that our ECDL can be locked for several hours to a given frequency with the broad temperature variation of about 0.2-0.4 °C. A rubidium saturated absorption spectroscopy was used to check our ECDL with the D2 hyperfine transitions. Our low-cost and stabilized ECDL can be used for cold atom experiments as well as in quantum and atom optics applications.
Microstructure of pyrite related to gold deposit, Huai Yuak area, Sukhothai Province, Northern Thailand
Authors: Tangwattananukul L 
Published: January 2021

Abstract
Huai Yuak area is located at Ban Kaeng Subdistrict, Sisatchanalai District, Sukhothai Province, Northern Thailand. The occurrences of gold are distributed along the Sukhothai Fold Belt from Phrae to Lampang though Sukhothai provinces. The Huai Yuak area is a one of the primary gold deposits in the Sukhothai Fold Belt. The geology of the Huai Yuak area is comprised of siltstone, sandstone, shale and tuff from the Permian to Triassic age. Quartz veins of the deposit were formed in siltstone, sandstone and shale. Based on the cross-cutting relationship and mineral assemblages, the quartz veins can be divided into three stages. Quartz veins of stage I are composed of a large amount of microcrystalline quartz with a minor amount of arsenopyrite and a trace amount of calcite, illite, pyrite, chalcopyrite, galena and electrum. Quartz veins of stage II consist of mainly quartz. Quartz veins of stage III are comprised of a large amount of dolomite and a small amount of quartz with a trace amount of illite and arsenopyrite. Electrum is associated with arsenopyrite, galena, pyrite, chalcopyrite and sphalerite. The electrum was formed as inclusion and filled in fractures of arsenopyrite and pyrite. Based on structure, texture and occurrence, pyrite and arsenopyrite can be classified into four types. Type 1 pyrite and arsenopyrite were disseminated in sandstone, siltstone and shale. Type 1 is characterized by euhedral to subhedral shape with size ranging from 0.1 to 3.0 mm. Type 2 pyrite and arsenopyrite were formed in a fracture as veins in shale and metashale. Type 3 pyrite and arsenopyrite occur in quartz veins. Type 3 is associated with galena, chalcopyrite, sphalerite and electrum. The electrum in Type 3 at Huai Yuak deposit was formed as inclusions and native gold associated with pyrite, arsenopyrite, chalcopyrite, galena, sphalerite and quartz of stage III. The concentration of electrum is related to arsenic content in pyrite. Type 4 of pyrite and arsenopyrite was formed in shale rock. Pyrite and arsenopyrite gains at the Huai Yuak gold deposit have had developed under a different structure and physical condition from uplift during volcanic arc setting.
Quasinormal modes of the electric potential in the 4 dimensional anti de Sitter Reissner-Norstöm black hole spacetime with scalar hair
Authors: Kanjanaphomchom P , Musiri S 
Published: January 2021

Abstract
In this study, analytical calculations are performed to assess the quasinormal modes (qnm) of the perturbed electromagnetic potential within the a four-dimensional spacetime of the Reissner-Nordström (RN) anti-de Sitter (AdS) black holes which are dressed with scalar hair. The black holes serve as the solutions for the Einstein-Maxwell theory under a negative cosmological constant and conformally-coupled real self-interacting scalar field. When the strength of the scalar field is suitable, phase transition of the black holes occurs to create a new form of MTZ black holes. The electromagnetic field can then be perturbed and the qnm and their frequencies calculated in order to meet the boundary conditions both at the horizon and at the far distant region from the new MTZ black hole. In order to address a simplified version of this problem, this study investigates the case whereby the mass of the MTZ black hole is significantly less than the AdS radius.
Effects of operating temperature on the electrochemical performance of a LiMn0.5Fe0.5PO4 cathode material for lithium ion batteries
Authors: Pleuksachat S , Krabao P , Pongha S , Nash J , Meethong N 
Published: January 2021

Abstract
Electrochemical performance of cathode materials for Li-ion batteries depends on their operating conditions, especially temperature. Currently, LiMn0.5Fe0.5PO4 (LMFP) cathode materials have attracted worldwide attention because of their low cost, low environmental impact, good electrochemical performance and high operating voltage, between 3.5 and 4.1 Volts. We investigated the effects of temperature on the electrochemical properties of LMFP. In this work, LMFP was prepared via a solvothermal method. We evaluated their electrochemical reactions using galvanostatic charge-discharge (GCD) cycling and electrochemical impedance spectroscopy (EIS) at temperatures of 15, 30, and 45 °C. The crystalline structure and morphology of LMFP were characterized using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM). The results showed that the discharge capacities of LMFP increased with temperature, which corresponded to lower charge transfer resistance within the cell and higher lithium-ion diffusion at elevated temperatures.
Effects of heat treatments on the microstructure and hardness of thermally sprayed Ni-Cr-Mo-Al alloy coating
Authors: Srichen A , Banjongprasert C 
Published: January 2021

Abstract
Thermal spray coating is one of the technologies used to prevent corrosion and wear by creating a protective layer on the substrate. From previous research, the microstructure of arc-sprayed nickel-chromium-molybdenum-aluminium (Ni-Cr-Mo-Al) after heat treatment at 1100°C was investigated. It was found that the corrosion rate of this coating under 20vol%H2SO4 was reduced by 97%. However, the heat treatment at high temperatures is still limited to industrial applications. Therefore, this research will focus on studying microstructure and properties after heat treatment at moderately high temperatures, which are in a range of service temperature. Specimens were arc sprayed and heat treated at 300, 400, 500, 600 and 700°C and characterized by Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray Spectroscopy (EDS) technique. Phases were analyzed by X-ray diffraction (XRD). There was no significant change of γ-Ni grains after heat treated at 600°C for 10 days from the Electron Backscattered Diffraction (EBSD) study. The hardness of the coatings increased after heat treatments due to a reduction in porosity, an increase of oxides and the formation of MoSi2.
Long fiber thermoplastic pellets of glass fiber/polypropylene from pultrusion process
Authors: Tipboonsri Ponlapath , Wattanahitsiri Voraya , Memon Anin 
Published: January 2021

Abstract
Long fiber thermoplastic pellets (LFTP) are composite materials that consist of thermoplastic and discontinuous reinforcement fibers with an aspect ratio more than critical aspect ratio. LFTP are high modulus, high strength and excellent impact resistance. Normally, commercial LFTP were produced by hot melt impregnation process or combinding between pultrusion and extrusion process. In this research, Thermoplastic pultrusion process was used for production of LFTP. The thermoplastic pultrusion process is uncomplicated process and machine less than hot melt impregnation process. The glass fibers were used in LFTP as a reinforcement and polypropylene (PP) fibers were used as a matrix of LFTP. General full factorial design of experiment was used to determine the optimal condition for un-impregnation on specimen from pultrusion process of LFTP. The study focused on three factors including the filling ratio, the molding temperature and pulling speed. The specimens were investigated on impregnation of resin in LFTP by microscope. The results show that un-impregnation decreased with an increase of filling ratio. Un-impregnation decreased with an increase of molding temperature. Finally, un-impregnation had increased with an increase of pulling speed. However, the void content has a little effect to molding temperature and pulling speed, or they have not almost effect. From statistical analysis, the optimal condition for the pultrusion process of LFTP was filling ratio of 104.73 %, molding temperature of 230 °C and pulling speed of 10 cm/min, which was given the lowest un-impregnation value of 5.85 %.
Synthesis of Tungsten doped Titanium dioxide nanofibers for the degradation of paraquat by photocatalytic process
Authors: Thongpool Voranuch , Phunpueok Akapong , Jaiyen Sarawut , Sukprasit Nuchita 
Published: January 2021

Abstract
In this research, tungsten doped titanium dioxide nanofibers were prepared by the hydrothermal method and used as a photocatalyst in the photocatalytic process. The prepared samples were investigated by XRD, FESEM, and UV-vis spectrophotometer. The experimental results show that the prepared samples have an anatase phase and absorb UV light. In addition, it was found that the increased amount of tungsten resulted in larger crystal size. For the efficiency of paraquat degradation by the photocatalytic activity of the prepared nanofibers, it was found that the W:15TiO2 nanofibers had the highest efficiency of paraquat degradation. It can degrade 73.97% of paraquat in 120 min.
Effect of soaking times on ferroelectric properties and strain behavior of PLZT ceramics
Authors: Funsueb N , Limpichaipanit A , Ngamjarurojana A 
Published: January 2021

Abstract
In this work, PLZT x/65/35 powders where x=4, 6, 8 and 10 mol% were prepared by mixed-oxide method and sintered at 1200 °C for 4, 8 and 12h. The electric field induced strain (S-E) and electric field induced polarization (P-E) were measured by using strain and polarization measurement system. It was found that PLZT 6/65/35 had the optimized condition with the soaking time of 12h. The highest remnant polarization (18.24 μC/cm2), saturated polarization (24.73 μC/cm2), strain (0.4090%) and d*
33 (204.50 pm/V) It can be concluded that the soaking times affected to ferroelectric properties and strain behavior.
Effects of low dose gamma irradiation of long period storage tomato seeds on germination percentage and seedling growth
Authors: Boonsua S , Chaiharn M , Sutigoolabud P , Prakrajang K 
Published: January 2021

Abstract
Low dose gamma irradiation was used to study stimulation effects on germination percentage and seedling growth of long period storage tomato seeds. Irradiation dose of Co-60 source ranging from 0 (control), 20, 40, 60, 80 and 100 Gy were used to irradiated 2 yearsstorage tomato seeds. After irradiation, the seeds were planted in tissue paper. On the eight days of germination, germination percentage, seedling length and root length were measured. The result shows that the germination parameters of the tomato seedssignificantly increased when irradiated with 20 Gy of gamma rays. This study may be useful for stimulating the germination percentage of tomato seeds stored for a long period.
A circuit design of laser pulse generator
Authors: Putchana W , Ratanavis A , Buranasiri P 
Published: January 2021

Abstract
In this research, a circuit design for square pulse generation was proposed by using microcontroller to generate pulse width modulation signal (PWM). The PWM signal, then, has generated the voltage for a laser diode of wavelength 650 nm. The frequency can be tuned approaching 0-5 MHz with the simplicity of the pulse width adjustment. The signals at the width of 130 x 10−9 s, 400 x 10−9 s, 600 x 10−9 s, 850 x 10−9 s, 1000 x 10−9s was examined to generate laser pulses. The heat in the pulse generator can be effectively controlled.
Effectiveness of tutorial worksheet for promoting basic vector concepts: dot product and cross product
Authors: Wutchana U 
Published: January 2021

Abstract
In recent years, several physics education researches have reported students’ understanding and difficulty of vector concepts. Lacking of understanding about dot product and cross product might cause many serious problems when the concepts are embedded in many physics topics. Therefore, we decided to design a tutorial worksheet that guides people through the development of a conceptual framework in dot product and cross product. The worksheet was implemented with 10 and 21 volunteer science teachers. Upon using the TUV items to evaluate their understanding, the results confirmed that the tutorial worksheet had facilitated their learning. The learning normalized changes were 0.82 and 0.75 considered as high learning gain. The tutorial worksheet might be used by other physics instructors who teach this material in high schools, colleges or universities.
Design & Implementation of Solar Powered Automatic Weather Station based on ESP32 and GPRS Module
Authors: Priambodo A S , Nugroho A P 
Published: January 2021

Abstract
The fundamental aim of this project is to develop a solar-powered automatic weather station (AWS), which can be accessed via the website. Users can find out the weather changes in an area without needing to come to the area and can do an analysis of irrigation water needs. This design uses ESP32 as main processor. The measure weather parameters include temperature and humidity using HDC1080 sensor, wind speed using an anemometer sensor, wind direction using a wind vane sensor, air pressure using BME280, rainfall using a tipping bucket sensor, and the last small solar panel for irradiance sensor. AWS has two working modes, normal and maintenance mode. During maintenance mode, sensor data will be displayed on a local website that can be accessed via a wifi network broadcasted by ESP32. In normal mode, the ESP32 will send sensor data to the cloud using SIM800L GPRS Module. The system proposed is also designed to have a feature to log sensor data locally in SD card. Watchdog timer circuit uses timer 555 implemented in this project for the recovery system from the failure process. Power sources are limited, so the system must be put into deep-sleep mode state when not processing data. Data transmission is carried out periodically with an interval of 5-6 minutes. Test results show that the sending of sensor data can be received by the cloud with an acceptance rate of up to 98%.
Comparison Four Kernels of SVR to Predict Consumer Price Index
Authors: Rohmah M F , Putra I K G D , Hartati R S , Ardiantoro L 
Published: January 2021

Abstract
The economy of a region is affected by the stability of food supplies. If the market price of the food supply is stable, the purchasing power level will increase. The price stability of food supplies can be anticipated by using the Support Vector Regression Method, to predict the Consumer Price Index, known as CPI. In the Consumer Price Index assessment, using data based on recording, measurement and calculation of the goods and services average price which consumed by households in a certain period of time. Goods and services that are deemed to represent household expenses are then averaged. The CPI in this study is a type of food supply issued by the Indonesian Central Statistics, and the input variable is taken from the prices of staple commodities in the city of Surabaya, Malang and Kediri based on data from the Siskaperbapo website. To get the supported vector data, the hyperplane maximized by the SVR concept. This concept is able to overcome the overfitting, in order to obtain more accurate prediction results. In predicting the Consumer Price Index, reference data is divided as training data 2016-2019 and testing data 2017-2020. All four kernels were used in the test, namely Spline kernel, Gaussian-RBF kernel, Linear kernel and Polynomial kernel. All four kernels are compared to see their MAPE, this can be shown by the Mean Absolute Percentage Error (MAPE) of less than three, if by using Gaussian RBF kernel. The smallest MAPE value showed by Malang CPI value, which is 1.8242 with C = 50, followed by Kediri with the MAPE value of 2.251 with C = 50 and MAPE value of Surabaya which is 2.5279 with C = 50.
A Need Analysis in Developing Tutorial Video to Improve Computer Assembling Skills of TKJ Students in Vocational High Schools
Authors: Yanti N E , Soenarto S 
Published: January 2021

Abstract
Technological developments in the current era make use of various media for learning. Learning media can facilitate and support practical activities to improve skills, one of which is by using video tutorial media because the video tutorials show the natural form of real objects to follow the instructions easily. This initial research aims to determine the need to develop video tutorial media used by teachers and students in the learning process to assemble computers at the Muhammadiyah 3 Yogyakarta vocational high school. This study used a descriptive-qualitative method by conducting interviews with one teacher and distributing needs analysis questionnaires to 30 students of class X TKJ as research subjects. The results obtained from the statement questionnaire given to students, 93% agreed to develop a video tutorial to facilitate understanding of the material to assemble a computer used for independent or group study wherever and whenever. This research can be used as a criterion for developing instructional media for video tutorials following the material’s characteristics for assembling computers.
Development of Game-based Learning using A Mobile App for Students Fractions Learning
Authors: Rochmah I N , Priyanto  
Published: January 2021

Abstract
Fractions are quite difficult lessons. Therefore, in elementary school, third-grade students have been taught how to solve fractions problems. Various innovations developed to make fractions learning easier for students. One of the uses of technology for efficient learning that can be carried everywhere is a mobile. The use of mobile for learning provides good ideas and benefits to motivate students in the learning process. In this study, the researcher develops a mobile app called Pecahanku to help students learn fractions. Black-box testing and TAM are used to measure eligibility and users’ acceptance toward using the mobile app. Pecahanku mobile app consists of a representation of fraction and fraction operation. Pecahanku mobile app also supports authentic learning to improve students’ understanding. The result shows that Pecahanku mobile app is eligible for use by students. Moreover, students perceive that using this mobile app for their learning process is easy to use. Thus, Pecahanku mobile app can make students feel fun and enjoy when students learn fractions.