bluuebunny/crossref_metadata_2025_split huggingface dataset:
A fluid formalism for low-temperature plasma flows dedicated to space propulsion in an unstructured high performance computing solver
Authors: Joncquieres V , Vermorel O , Cuenot B 
Published: December 2019

Abstract
With the increased interest in electric propulsion for space applications, a wide variety of electric thrusters have emerged. For many years, Hall effect thrusters have been the selected technology to sustain observation and telecommunication satellites thanks to their advantageous service lifetime, their high specific impulse and high power to thrust ratio. Despite several studies on the topic, the Hall thruster electric discharge remains still poorly understood. With the increase of available computing resources, numerical simulation becomes an interesting tool in order to explain some complex plasma phenomena. In this paper, a fluid model for plasma flows is presented for the numerical simulation of space thrusters. Fluid solvers often exhibit strong hypotheses on electron dynamics via the drift-diffusion approximation. Some of them use a quasi-neutral assumption for the electric field which is not adapted near walls due to the presence of sheaths. In the present model, all these simplifications are removed and the full set of plasma equations is considered for the simulation of low-temperature plasma flows inside a Hall thruster chamber. This model is implemented in the unstructured industrial solver AVIP, efficient on large clusters and adapted to complex geometries. Electrical sheaths are taken into account as well as magnetic field and majors collision processes. A particular attention is paid on a precise expression of the different source terms for elastic an inelastic processes. The whole system of equations with adapted boundary conditions is challenged with a simulation of a realistic 2D r–z Hall thruster configuration. The full-fluid simulation exhibits a correct behavior of plasma characteristics inside a Hall effect thruster. Comparisons with results from the literature exhibit a good ability of AVIP to model the plasma inside the ionization chamber. Finally a specific attention was brought to the analysis of the thruster performances.
The q-derivative and differential equation
Authors: Akça Haydar , Benbourenane Jamal , Eleuch Hichem 
Published: December 2019

Abstract
The q-calculus appeared as a connection between mathematics and physics. It has several applications in different mathematical areas such as number theory, combinatorics, orthogonal polynomials, basic hypergeometric functions, quantum theory, and electronics. Recently, a great interest to its applications in differential transform methods, in order to get analytical approximate solutions to the ordinary as well as partial differential equations. In this paper, we present some of the interesting definitions of q-calculus and q-derivatives. By using q-calculus, solutions of some differential equations could be generated.
Peter Chew method for quadratic equation
Authors: Chew Peter 
Published: December 2019

Abstract
Peter Chew Method is easy and suitable for higher order function. what’s now solution not suitable for higher order function. Peter Chew Method not suitable for quadratic equation contain unknown. Peter Chew method similar with Remainder Theorem, Remainder Theorem is easy and suitable for higher order, but Remainder Theorem not suitable for polynomial function divisor.
Simplified swarm optimization for optimal deployment of fog computing system of industry 4.0 smart factory
Authors: Yeh Wei-Chang , Lai Chyh-Ming , Tsai Jr-Yu 
Published: December 2019

Abstract
Fog computing is an emerging technology that can reduce the load on cloud system and decentralize computing resource, thus increasing response speed and reducing time delay. More and More environments in order to achieve intelligence, collect massive amounts of data though IOT devices. Considering deploying fog computing system in these environments can make system faster and more robust. This work creates a simulated factory consisting of a cloud center, gateways, fog devices, edge devices, and different types of sensors. We build an integer programming model and apply metaheuristic method for determining the layout of above devices except of cloud center and all sensors so that can find the cost minimization deployment of the smart factory.
The D-N alternating algorithm based on the curved-FEM and moving mesh for the exterior harmonic problem
Authors: Zheng Quan , Wang Sheng 
Published: December 2019

Abstract
In this paper, we study the numerical solution of the exterior harmonic problem with the Dirichlet boundary value condition. Owing to the difficulties of solving directly in the unbounded domain, we decompose the exterior problem into a mixed boundary value problem on a bounded annular subdomain and a Dirichlet boundary value problem on an unbounded subdomain by constructing an artificial boundary. Then, the Dirichlet-Neumann (D-N) alternating algorithm is proposed to solve two sub-problems alternately, where the former is solved by the curved-FEM, while the latter is solved by the principle of natural boundary reduction (NBR). Rather than the standard FEM, the curved-FEM is conforming and gives better discrete approximate variational formulation of the algorithm. The geometrical convergence of the discrete algorithm is also obtained. Finally, the D-N alternating algorithm based on the curved-FEM and the moving mesh method is shown to achieve higher precision in the numerical example.
Fog computing task scheduling optimization based on multi-objective simplified swarm optimization
Authors: Yeh Wei-Chang , Lai Chyh-Ming , Tseng Kuan-Cheng 
Published: December 2019

Abstract
With the dramatic growth of data volume, the cloud computing structure has faced a severe difficulty, the latency. To deal with this problem, researchers have proposed the fog computing structure, which can successfully release the computation loads from one datacenter of cloud to multiple local fog devices. Hence, the tasks will be processed at the local fog device and avoid transmitting to datacenter which is not cost-effective, and the results can be transmitted to the users immediately. The main differences of task scheduling between cloud computing and fog computing are the processors specifications, such as processing rate, cost per unit time. The processing rate of processors in datacenter is fast but the cost per unit time is costly. However, the processing rate of fog devices is not as fast as datacenter but it is relatively cost-effective. Consequently, we are facing a multi-objective optimization problem. Hence, we adopted an elite MOSSO (Multi-Objective Simplified Swarm Optimization) with considering the characteristics of fog computing paradigm.
Bifurcation analysis for a functionally graded materials plate: two pairs of pure imaginary eigenvalues
Authors: Yu Weiqin , Li Na , Zhao Shouwei 
Published: December 2019

Abstract
In this paper, the dynamics in the vicinity of a compound critical point which is characterized by two pairs of pure imaginary eigenvalues are studied for a simply supported functionally graded materials rectangular plate. The solutions for equilibria and quasi-periodic motions are obtained and stability conditions of these solutions are presented. The numerical simulations confirm the analytical predictions.
An automated system in detecting solar radio bursts type II and IV associated to multiple Coronal Mass Ejections
Authors: Ansor Nurain Mohamad , Hamidi Zety Sharizat , Shariff Nur Nafhatun Md 
Published: December 2019

Abstract
This paper presents an automated system named as CALLISTO which is implemented to record solar radio bursts emissions associated to solar activity. CALLISTO is a spectrometer used in solar activity observations in order to monitor the Sun’s activity and behaviour and also as an indicator of upcoming solar events. Solar radio bursts type II is known as slow drift going from high to low frequency at a range of 20 MHz-150 MHz. It is found to be associated to Earth-directed Coronal Mass Ejections (CMEs) travelling at a very high speed. On 4th November 2015, type II and IV bursts were detected by Almaty and Bir station respectively along with multiple formation of CMEs throughout the day. Due to the shock wave from CMEs, a minor G1 storm was triggered on 7th November 2015 leaving an aurora scenery over the skies of several states in USA. However, no damages on power systems were reported. Comprehensive discussions on this event are discussed in this paper.
Teaching Microcontrollers using Arduino Nano Based Quadcopter
Authors: Santosa E S B , Waluyanti S 
Published: December 2019

Abstract
Learning to use the Arduino Nano based quadcopter is an innovation that can improve students’ motivation in learning. Microcontroller learning is one of the subjects in vocational high school, especially in electronics engineering. This study aims to motivate students in learning and knowing students’ responses about the use of Arduino Nano based quadcopter learning media. The first stage of this learning is students learn about components that exist in the quadcopter and remote control. The second stage of students integrates between components to form a quadcopter and remote-control system. The last stage is students learn to program using Arduino. Data is obtained by using a questionnaire to determine students’ responses to learning by using these media. Data are obtained from students’ motivational questioner in 1 Magelang public vocational high school in Indonesia with a total of thirty-two students. The result showed that motivation students increased after participating in learning using Arduino Nano based quadcopter.
Health Care Monitoring System Based-on Internet of Things
Authors: Taryudi  , Prasetyo I , Nugraha A W , Ammar R S 
Published: December 2019

Abstract
The development of technology in the era of the industrial revolution 4.0 have led to the emergence of the Internet of Things (IoT). IoT allows an electronic devices to send and capture data through the internet and provides more methods of data interoperability. Nowadays, IoT plays an important role not only in communication, but also in monitoring, recording, storage and display. Currently, the application of IoT in health monitoring system to monitor conditions in the vital signs of the human body becomes interesting issues as an effort to prevent disease. In this article, a system that can monitor vital sign parameters and transmits data through wireless communication was developed, then those data transferred to the network via Wi-Fi modules. Data can be accessed at any time and represent the patient‘s current condition. So that a nurse or doctor can monitor the patient‘s data in real time through an application software on smartphone. Overall the system developed consists of DFRobot Firebeetle ESP32 as a controller that has been equipped with Wi-Fi modules, Sensor MAX30100 as a pulse detector and MLX90614 sensor as a body temperature detector. Also added is a GPS (Global Positioning System) module to detect patient locations in real time and an OLED (Organic light-emitting diode) module as data viewer. The test results show that the overall system was worked properly with a 6.5% error for pulse detection, 4% for oxygen detection and 1.7% for body temperature. As for the accuracy of the position generated by GPS that is 7 meters.
Experimental Study of Measuring Radiation Patterns for VHF and UHF Antennas
Authors: Marpanaji E , Yuwono K T , Mahali M I , Aji P T , Nugraha N A B 
Published: December 2019

Abstract
This paper discusses the experiment of measuring antenna radiation patterns using hardware and software that has been made previously. The antenna measured is the Half Wave Open Dipole antenna that works at VHF frequencies as Antenna Under Testing (AUT). The hardware used is Module-1 and Module-2 which have previously been tested for functionality, and the software is the Antenna Radiation Pattern application that is created using the Visual Basic programming language in the Microsoft Visual Studio package. Radiation pattern measurement experiments were carried out under various conditions, namely (1) without RF signals; (2) with RF signal and the position of the transmitting antenna is 0o with AUT; (3) with the RF signal and the position of the transmitting antenna at an angle of 90o to AUT; and (4) simulation of electromagnetic wave interference when making measurements. Based on the results of experiments conducted, it can be concluded that the Antenna Radiation Pattern application has functioned well and can describe the AUT radiation pattern. Future work of this research is the measurement of radiation patterns for other types of antennas and refinement of applications for the measurement of various antenna parameters.
Develop of Control Water Supply Pump Based on Supervisory Control and Data Acquisition on Instrumentation and Power Generator Control in Grade X Students Majoring In Electric Power in the PGRI 3 Vocation School Malang
Authors: Rahmawati Y , Zainuri M , Afandi A N 
Published: December 2019

Abstract
The quality of education can affect the quality of the learners were produced. The importance to improve the quality of education so learners produced increased anyway. According to Asyhar, one way to improve the quality of education is the use of media of instruction. Instrumentation and generator control the Generator operation of SCADA on power plant aims to train students designing and mengoperasiakan the existing SCADA system at the power plant. One operation of SCADA in electricity generation at the WTP (Water Treatment Plant), namely on Water Supply Pump to control water pump. SCADA learning media packed in prototype trainer Water Supply Pump -based Supervisory Control And Data Acquisition SCADA learning to support. Aiming to understand the way design of SCADA, create, communicate, SCADA program and operate it. The model used is the development model of development Sugiyono. Stages of development model Sugiyono are: (a) the potential and problems, (b) data collection, (c) product design, (d)design validation, (e) the revised design, (f) a trial product, (g)product revision, (h) a trial use, (i) the revision of the product, and (j) production mass. The results of the research and development shows that the eligibility level trainer control water supply pump has a percentage of 91.9% of the 3 (three) validator experts which means decent products used with little revision, 83.72% of test small groups by 10 (ten) grade X PBB meaning decent products used without revision, 90.53% of tests by a large group of thirty (30) students of class X PBA product which means it is very worthy of being used without any revisions. The conclusions of this research and development are decent products used in the learning process. The product can help learning activities can help so that the students of class X students majoring in electric power can be better understand the operation of scada in electricity generation units.
Case Based Reasoning: Recommendations of High School Student Program
Authors: Lutfiyani Anisa , Arifin Fatchul 
Published: December 2019

Abstract
Study Program Recommendation System is a computer-based information system that aims to provide an overview or recommendation of study program based on students’ interests or character from testing through Case Based Reasoning method. The main purpose of this article is to develop of expert system as study program recommendation for High School student through Case Based Reasoning. This system is made because many parents tend to force their health when choosing a college for their children. It can be impact on the children’s developing. Determining the recommendations of a student‘s study program with a certain character, often not enough for the expert‘s knowledge, but need to pay attention to cases or events similar to those of the student. A concept held in the field of artificial intelligence that uses case-based or CBR reasons for analysis and decision making. Decisions are determined by calculating the similarities between the new cases and the expert case that has occurred. This study is observation and literature study. The results of this study showed that an engineering inference expertise with the aim of obtaining a decision of study program recommendations can be done using the CBR method based on the characteristics of students.
Optimization of Web-Based Learning Media in SMK PGRI 3 Walikukun
Authors: Iswahyudi D , Soenarto  
Published: December 2019

Abstract
This study aims to determine: (1) appropriate web-based learning methods to improve student learning outcomes, (2) the teacher‘s method of using web-based learning media to influence student achievement, and (3) Is the optimization of web-based learning media able to meet standards creative, active, and fun learning at SMK PGRI 3 Walikukun. The method used in this study uses a research and development (R&D) approach. The population in this study were students of SMK PGRI 3 Walikukun Based on data analysis, the results of this study showed that: Optimization of web-based learning media through the PBL approach was more effective in improving ICT competency in SMK PGRI 3 Walikukun students both in the process and learning outcomes which include aspects of competence knowledge, attitudes, skills and participation compared to before are still widely used direct learning models. The results of the conclusions indicate an increase in teacher skills in applying the syntax of the optimization model of web-based learning needs to be improved, by using a problem-based learning system learning activities take place interactively and student-centered, the results can increase student grades.
Design and Analysis of Database Clustering System of Micro, Small and Medium Enterprises (MSME) in Bantul Regency
Authors: Rachmawati Rr. Y , Sholeh M , Suraya  
Published: December 2019

Abstract

Information system support is really important for the existence of MSME in economic competition today. The implementation of information system for MSME is expected to develop the competitiveness through the added value for products and services. One of the examples of the utilization of information system implemented for MSME is the geographical information system which informs the location and the potential MSME. In order to present the information of the potential of MSME optimally in the geographical information system, analysis and design should be made as complete as possible. In this research, the geographic-based information system is developed for the MSME businessmen in Bantul. The system design is started by building a database. The purpose of this research is to design a database that is designed to avoid duplication of data and simplify the storage process and when displaying data. The process of geographical information system database of MSME is detailed into tables. The database process of the MSMES geographic Information system is detailed into tables. By being detailed into some of these tables the duplication can be avoided. Table designed between MSMES table that stores SME master data such as latitude and longitude position, MSME detail table, video, gallery, Medkom and tables that store the location of the area, such as sub-district table, Village table, Dusun table and Clustered tables from MSMES. The implementation of database design is developed into geographical information system using PHP language and utilizing google map to display the geographical position of MSME businessmen. The next application development can be developed based on Android.
Seepage forecast model based on time-series cubic exponential smoothing method
Authors: Wang Xufeng , Fang Xushun , Jin Jianfeng , Bao Hongyan , Wang Xiaoji , Gao Chao , Liu Hongxia 
Published: December 2019

Abstract
Seepage monitoring is a vital part of daily management of dams. However, the seepage data are non-linear which is hard for administrators to use. This paper uses time-series along with the cubic exponential smoothing method to analyse the past monitoring data and get a forecast model. As the data accumulate, the model evolve and form a more precise model. Two year’s seepage monitoring data are analysed of Xianlin Dam with this method and the result of the contrasted data turned out to be well simulated.
Impact of double defects on seepage behavior of geomembrane lined earth-rock dams
Authors: Du Xuhuang , Cen Weijun , Wen Zhenyu , He Haonan 
Published: December 2019

Abstract
In this study, the unsaturated seepage theory was employed to analyze the effect of different elevations and separations of double defects in geomembrane barrier on the seepage behavior of geomembrane lined earth-rock dams. The results indicated that the separation between the defects has a significant influence on the defect-induced leakage. The increasing separation results in the increase of defect-induced leakage. When the separation reaches 3 m, the defect-induced leakage tends to decrease. The defect-induced leakage increases again when the separation is greater than 3.5 m. And defect-induced leakage increases gradually with decreasing elevation of defect, but is still in the same order of magnitude. In addition, the wetted area near the defects expands with the increasing separation between double defects. The wetted areas can be delineated by a circle, by an ellipse or by two discrete circles depending on the separation and elevation of double defects.
The influence of technological parameters on the efficiency of the hydrate formation reaction in the system methane — SDS aqueous solutions
Authors: Gaikovich M V , Dudoladov A O , Vlaskin M S 
Published: December 2019

Abstract
The article deals with methane hydrate synthesis in the presence of sodium dodecyl sulfate. The search for optimal conditions for this synthesis in a cylindrical continuous stirred tank reactor was provided. The limit after which the increasing of pressure in the reactor does not make a significant contribution to an increase in the gas content of the product was experimentally detected. The analysis of the impact of cooling rate on intensity of the hydrate formation had been carried out. The mode of gas supply to the reactor, cooling rate and working pressure, ensuring the highest efficiency of the methane hydrate synthesis under the specified conditions, are found.
Full-field mode sorter using two optimized phase transformations for high-dimensional quantum cryptography
Authors: Fickler Robert , Bouchard Frédéric , Giese Enno , Grillo Vincenzo , Leuchs Gerd , Karimi Ebrahim 
Published: December 2019

Abstract
High-dimensional encoding schemes have emerged as a novel way to perform quantum information tasks. For high dimensionality, temporal and transverse spatial modes of photons are the two paradigmatic degrees of freedom commonly used in such experiments. Nevertheless, general devices for multi-outcome measurements are still needed to take full advantage of the high-dimensional nature of encoding schemes. We propose a general full-field mode sorting scheme consisting of only up to two optimized phase elements based on evolutionary algorithms that allows for joint sorting of azimuthal and radial modes. We further study the performance of our scheme through simulations in the context of high-dimensional quantum cryptography, where sorting in different mutually unbiased bases and high-fidelity measurement schemes are crucial.