bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fire spread simulation using cellular automata in forest fire
Authors: Bhakti H D , Ibrahim H , Fristella F , Faisal M 
Published: May 2020

Abstract
Forest fires are adverse events both economically and mentally. Triggers of fires are complex variables so that the spread of fire to date has not been predicted. Modeling is one solution to study the process of spreading fire. The Cellular automota was used to simulate the spread of fire in forest fires. Simulations carried out with simulations carried out by varying the value of burnability. burnProbability is a value that shows the probability of a tree burning. The value of burnability used is 10%, 20%, 30%, 40%, 50%, 60%, 70% and 80%. From each burnProbability value, the percentage of forest that is burned is calculated. The simulation was carried out for 17 iterations for each burnProbability value. The results of the average is the greater the value of burnProbability, the greater the percentage of burned forest. When the burnProbability value of 80% of the burned forest is almost entirely, it is 97.23183%.
Data security improvements on cloud computing using cryptography and steganography
Authors: Astuti N R D P , Aribowo E , Saputra E 
Published: May 2020

Abstract
Cloud computing is a service that eases its users to store data on the internet. However, cloud computing has lack, which is related to stored data security specifically to image file that can be manipulated easily. To improve the data securities of JPG file type on cloud computing, the combination of advanced encryption standard (AES) cryptography and least significant bit (LSB) steganography methods is required. This study implemented AES 128 algorithm cryptography process to scramble the messages that will be inserted and LSB steganography to hide the messages that has been scrambled. The data were assessed using Stegspy. The results of this study indicated that cloud computing service of Platform as a Service (PaaS) has resulted ciphertext that was attached to JPG/JPEG images using Least Significant Bit (LSB). From 5 (five) samples, the encryption result testing on JPG/JPEG files was bigger than the original file. The bigger the number of characters of the inserted text, the bigger the size of JPG/JPEG files will be.
Application of genetic algorithm concept on course scheduling
Authors: Ansari R , Saubari N 
Published: May 2020

Abstract
Genetic Algorithms have parameters such as crossover probabilities and mutation probabilities used based on entering population numbers and number of generations. Of the two entries, nine rules were obtained which would produce crossover probabilities and mutation probabilities. One problem that can be solved using a genetic algorithm is the scheduling of courses. In the preparation of course scheduling, it takes quite a long time and needs a very high accuracy. Therefore, the purpose of this study is to implement genetic algorithms on lecture scheduling problems. So that the accuracy and speed in determining the class schedule can be fulfilled. The test results show that applying a genetic algorithm can obtain the course schedule without any collision in one iteration process.
Design of control system expand valve on water heating process air jacket
Authors: Pasaribu F I , Roza I 
Published: May 2020

Abstract
Many automatic machines implemented in the processing of palm oil in the industry are less effective in working on a heating control process in the jacket water system. With the ATMega, 328 Arduino Uno microcontroller control system as an Arduino program input and output controller and “C” language, a servo motor as output (valve) is controlled, and LCD as a display device for LM35 temperature detection can make it easier for workers to control the process of controlling water temperature on the jacket and can avoid failure in the process of melting the palm oil from the previous processing so that the oil in the pipeline continues to flow. The method used in this research is the design method that consists of several stages, namely, (1) Requirement analysis, (2) Design, (3) Implementation of the circuit, (4) Testing Procedures and (5) Testing tools. The level of accuracy of the rotation degree of the servo motor (as a valve) qualifies 100% (>35 °C and ≤ 49 °C, the motor rotates 40o), the relationship between temperature and the rotation speed of the servo motor qualifies with 100% accuracy (>50 °C and ≤ 53 °C then the motor rotates 80 °C) The overall performance of this tool can work well and calibration of the detection temperature value between the LM35 sensor with a thermometer has a difference of 1 mV so that it can be implemented by adjusting devices in the industry.
Structure Design and Analysis of a Novel Forward-folding Rotor used in a Downwind Horizontal-axis Turbine
Authors: Meng Haoran , Zeng Pan , Lei Liping 
Published: May 2020

AbstractTo alleviate the stiffness constraints of the conventional blade and thus reduce the rotor mass, a novel forward-folding rotor (Downwind Forward-folding Rotor, DFFR) used in a downwind horizontal-axis turbine is presented. This novel rotor is designed to align the combination of gravitational, centrifugal, and thrust forces along the blade path, resulting in primarily tensile loads instead of cantilever loads on the blades. The DFFR blades fold forward at a power-limited condition, which induces the change of the blade pitch angle and cone angle and thus maintains a constant power output. To quantify the mass savings, a 5-MW DFFR was designed based on the NREL 5-MW reference rotor. According to the results calculated by an improved BEM method, the rotor power and torque of the 5-MW DFFR have a slight increase compared with those of the NREL-5MW reference rotor, while the rotor thrust of the 5-MW DFFR is smaller than that of the NREL-5MW reference rotor. Furthermore, based on the finite element analysis, the blade of the 5-MW DFFR had an 18.9% mass saving and an 8.4% peak stress reduction compared with the blade of the NREL-5MW reference rotor, over a range of operating wind speeds and azimuthal angles.
Lean Improvement of Product P Assembly Line based on Value Stream Map
Authors: Chang Kai , Tan Guangchao , Wang Xiaolong , Zhou Changjun , Wei Luyuan 
Published: May 2020

Abstract
Based on the product P assembly line transformation project of a company, the main problems of the original production line are analyzed with the method of Value Stream Map. Lean improvement measures which is used in the design of new production line are put forward in the aspects of overall layout, process arrangement, production mode, material buffer, auxiliary equipment and personnel allocation to reduce some non-value added activities and wasteful behaviors. By the Value Stream Map of the improved lean production line, the evaluation indexes can be improved significantly. After the new production line is completed and put into production, the workshop stock is reduced, the production efficiency is improved, and the production cost is reduced.
Restoration and Reuse Design of Industrial Heritage based on Virtual Reality Technology
Authors: Jue Chen , Chen Wang 
Published: May 2020

Abstract
Based on the practical work of revitalizing the old industrial heritage of Zhengzhou No.2 Abrasive Wheel Factory, the method and technical feasibility of the restoration and reuse design of industrial heritage based on virtual reality technology are discussed in the paper. The research is based on MARS virtual reality technology platform, which is compatible with traditional modeling software, such as SKETCHUP and 3DMAX, and can directly use related software for modeling and import, reduce repetitive work and greatly shorten working time. In addition, the platform has good post-scene simulation function and is suitable for restoration and creative conceptual design in complex environment. The paper is divided into three parts. The first part is a brief introduction of the project background and task. The second part discusses the virtual reality technology solution proposed according to the project needs, and further analyzes the implementation process and technical characteristics of the solution. The final part evaluates the role of virtual reality technology in the restoration and reuse design of industrial heritage, so as to provide some inspiration for relevant designs.
Research on Artificial Intelligence in the Field of Art Design Under the Background of Convergence Media
Authors: Yu Yan , Binghong Zhan , Fei Guo , Jiaxin Tian 
Published: May 2020

Abstract
With the continuous development of artificial intelligence, the application of artificial intelligence no longer repeats the “science and technology”, “medical research and development”, “computer” and other engineering disciplines. In recent years, artificial intelligence has also been fully developed and innovated in the “art” field. This paper will focus on the research of artificial intelligence in the field of art in the context of convergence media, and hope to provide new ideas and new dimensions for the future of art design.
Study on the Brine Storage Design During the Engine Running in the Climatic Facility
Authors: Hui Zhang , Jingtao Wu , Zhu Cheng 
Published: May 2020

Abstract
The engine will consume a large amount of air in the climatic environment facility when the engine is running in the test. The pressure in the chamber may decrease and the temperature in the chamber will change. In order to ensure the continuity and safety of the climatic test, the jet engine make-up air unit (JMAU) will compensate the cold/heat to guarantee the continuous and effective performance of the engine start-up test. Therefore, we should design the brine storage to ensure the supply of the brine.
Continuous Forming System for Forming 3D Surface Parts and Its Finite Element Model
Authors: Wang Mi , Yang Shuchen , Lu Guolong 
Published: May 2020

Abstract
Continuous forming system (CRS) is a novel technique for manufacturing 3D surface parts. CRF employs two flexible rolls to generate deformation by controlling roll gap between two flexible rolls. Finite element model is set up to investigate the CRF process. The influence of maximum height difference and maximum compression ratio difference in cross-section has been investigated. The accuracy of the longitudinal was demonstrated through numerical simulations. CRF experiments were performed and the results show the shape of the formed part is in good agreement with the shape of the desired part.
Sound Quality Prediction of Vehicle Door Closing Based on Experiment and Boundary Element Method
Authors: Yunkai Gao , Zhe Liu 
Published: May 2020

Abstract
The sound quality of the vehicle door can only be improved after the testing vehicle has been manufactured. In this paper, a simulation model of the door system closing collision is established, and the vehicle test and the bench test are designed. In the vehicle test, according to the design characteristics of the door structure and the situation that the operating load cannot be obtained directly. The impact load on the door are simplified as the concentrated loads when the door is closed. The reference points are arranged near the location of the concentrated loads, and the number is twice of the concentrated loads. The acceleration response at the reference points are measured. In the bench test, the frequency response functions (FRFs) from the concentrated load points to the reference points are measured. Using the inverse matrix method, the value of the concentrated loads are obtained. A boundary element model is established and the concentrated load are applied to the model to collect sound pressure signals at the field point. The results show that the sound pressure values obtained by experiment and simulation are highly consistent. It shows that this method is feasible in predicting the sound quality.
Hybrid Impedance Control of Robot Manipulators based on Generalized Momentum
Authors: Li Kaining , Zhang Xianmin , Huang Yanjiang 
Published: May 2020

Abstract
In the hybrid impedance control strategy, the task space is divided into position control subspace and force control subspace, and the constraint direction in the manipulator task space is controlled by torque-based impedance control, while the free movement direction is controlled by position-based impedance control. The hybrid impedance control has strong force tracking characteristics in the direction of force control and strong flexibility in the direction of position control. In this paper, we use the generalized momentum observer instead of the torque sensor to estimate the torque exerted by the external environment on the robot. Simulation results are shown for a three-link SCARA robot.
Research on Process Reliability of RF Coaxial Cable in Spacecraft Assembly
Authors: Fan Yougao , Zhao Peirong , Liu Guangtong , Liu Shuang 
Published: May 2020

Abstract
This paper is concerned with the process reliability of RF coaxial cable in the spacecraft assembly. By carrying out some process tests, the effects of coaxially of the inner and outer conductors of the RF coaxial cable assembly, the number of cable winding coils, the bending radius of the RF coaxial cable, and the extreme conditions of the assembly on the performance of the RF coaxial cable are studied. According to the test results, a more comprehensive process method and specific process parameters are obtained, thereby further improving the reliability and safety of the RF coaxial cable in the spacecraft assembly.
Experimental Study on Friction Torque of Wet Clutch under Three Kind of Contact Areas
Authors: Xu YAN , Man CHEN , He-yan LI , Bin ZHANG , Xiao-peng ZHANG 
Published: May 2020

Abstract
It is of great significance to study the friction characteristics in the process of slippage and friction of the wet clutch for optimizing vehicle start, improving vehicle driving comfort and prolonging the service life of the clutch. Based on the test data of wet multi-plate clutch under braking condition in SAE#2 test bench friction torque test, we analyze the influence of rotate speed and average pressure on the friction torque through the comparison of friction torque under two friction pairs. The results show that in the case of sufficient lubricating oil flow, the attenuation of multiple pairs of friction plates has nothing to do with the proportion of the groove area of friction plates. Friction torque attenuation will occur under any groove area, but different groove areas will affect the rotate speed and average pressure of this phenomenon. In general, the frictional torque attenuation of wet multi-plate clutch gradually increases with the increase of relative speed and decreases with the increase of average surface pressure.
Iodine Plasmonic Crystal as the Visible-Range Spectral Filter
Authors: Filatov V V , Gorelik V S , Pichkurenko S V 
Published: May 2020

Abstract
We analyse the optical properties of the new hyperbolic metamaterial based on the one-dimensional mesoporous aluminum oxide (Al2O3) photonic crystal film doped by metallic iodine (I2) nanoparticles. The nanocomposite is a metal-dielectric hybrid and combines the classical photonic crystal features (such as photonic bandgaps, light deceleration, negative refraction etc.) with the metallic ones (low-frequency mirroring, plasmons etc.). To get this, we propose to saturate the pores (microcavities) of the periodic aluminum oxide photonic crystal matrix synthesized by the controlled acid etching at its anonization, by the iodine vapor. This way, in the photonic crystal pores, we form the cold plasma of the iodine free electrons, and make the nanocomposite the plasmonic photonic one. Note, that the iodine saturation level defines the plasma frequency which is directly affects the crystal characteristics, so we get them easy-tunable. For example, we offer the two iodine-saturated photonic crystals with various doping level in the pass-and-reflect scheme to spectral filter the optical radiation. At last, we also wish to note that simplicity of the saturation technology makes the iodine plasmonic crystals attractive for the wide commercial usage in the large-scale optic and photonic applications and devices (such as spectral filters, optical amplifiers, high-performance selective mirrors, photonic sensors etc.).
Dispersion of Light in the 1D Photonic Crystal
Authors: Pichkurenko S V 
Published: May 2020

Abstract
We propose a novel, Kurosawa-like model to evaluate the 1D (Bragg stack-like) mesoporous aluminium oxide photonic crystal. To do this, we analyze the internal potential of the photonic crystal superlattice and get it describing the set of the medium’s polar oscillators. Unlike the atomic oscillators for a common crystal, these ones are the abstract ones. This way, the real photonic crystal can be dealt as an abstract oscillators’ ensemble. The result is fully agreed with the thermodynamics, and makes the theory very powerful. To obtain the oscillators parameters, we compare the theory with the secondary emission spectrum of the crystal, and get the natural frequency and the force for each oscillator. This phenomenological approach allow us to calculate photonic crystal’s optical characteristics, such as the dispersion law for the light in the nanostructure, the secondary emission spectrum of the composite, the speed of light in the crystal and the effective mass of the speed quanta. We establish the room-temperature Bose-Einstein condensation of polaritons in crystal at the photonic bandgap edge. The results are important to the solid-state detection of paraphotons.
Investigation on Solubility of Carbon Dioxide in the Mixed Aqueous Solution of MEA and 2-MAE
Authors: Meekoch Thidarat , Maneeintr Kreangkrai 
Published: May 2020

Abstract
Absorption with amine solution is a method to reduce CO2 causing climate change. The commercial amine solution is MEA. The disadvantage of MEA is low CO2-loading capacity. Also, 2-(methylamino)-ethanol or 2-MAE is a new solvent developed to improve absorption performance. The aim of this work is to measure the CO2 solubility in the mixture of MEA and 2-MAE at 15:15 %wt, from 30 °C to 80 °C and CO2 partial pressures ranging from 5 to 100 kPa. From the results, at the same conditions, 30 %wt of MEA has higher absorption capacity than that of 15:15 %wt of MEA:2-MAE and 30 %wt of 2-MAE for 4.51 % and 7.04 %, respectively. For cyclic capacity, 15:15 %wt of MEA:2-MAE has capacity greater than 30 %wt of MEA for 34.10 % but lower than 30 %wt of 2-MAE for 22.78 %. A mixed-amine solution can be applied to reduce the disadvantage of MEA solution.
Glycerin Separation from Biodiesel Transesterification Process by Pulsed Electric Field with Specific Pulse Forming Network
Authors: Hinthao Thanadol , Wongwuttanasatian Tanakorn , Kampeerawat Warayut , Suksri Amnart 
Published: May 2020

Abstract
Biodiesel production process can be rapidly done if the glycerin separation can be removed faster. With the palm oil crisis, biodiesel is needed for faster production to add more value and to solve the oversupply problem. Pulse forming network circuit can generate pulsed electric field (PEF) to speedily separate glycerin from biodiesel production. While the substance is reacting, the electrical impedance value of glycerin is changed, the pulse forming network will keep waveform to be a square wave. Transesterification process using palm oil mixed with methanol with a molar ratio of 1:6 by using 1 wt.% of KOH as a catalyst. The reaction chamber electrode was coaxial cylindrical electrodes with diameter 6 cm and 1 cm. The maximum voltage across the reaction chamber is 500 V with 1, 5 and 10 kHz frequency. Glycerin separation was best achieved when using 5 kHz frequency. The glycerin was obtained at 155 ml in 20 minutes.
Preparation and Storage Energy Density Base on Dielectric Properties of P(VDF-HFP)/PU/BNKT Thin Films
Authors: Jehlaeh K , Salea A , Bomlai P , Putson C 
Published: May 2020

Abstract
Novel electrical devices based on energy storage capacitor and energy conversion, have developed to advanced dielectric properties including electrical performance.In this work, three phases composite of poly(vinylidene fluoride hexafluoropropylene) (P(VDF-HFP)) blended with polyurethane (PU) and filled with Bi0.5(Na0.8 -K0.2)0.5TiO3 (BNKT) ceramic was studied on the on the dielectric, electrical properties and a storage energy density. All composite thin films are fabricated by the tape casting method in solution. Polarization-Electrical (P-E) loop of all composite thin films were also investigated relaxor-ferroelectric characteristic with the various electric fields. The recoverable energy density and energy efficiency from the loop were then analysed. As a result, the three phases composite of P(VDF-HFP)/PU/BNKT composites produce the highest dielectric constant as well as conductivity; however, they produce the lowest energy efficiency in this work. It seems that the interfacial polarization is easy switchable dipole moment in three phases more than one phase, resulting in high dielectric constant as well as conductivity. However, the larger conductivity seemly generates larger dielectric loss, resulting in lower energy efficiency. Therefore, the comparison based on three and two phases can be used to predict in capability of electric capacitor devices in the future.
Reconstructing irreducible links in temporal networks: which tool to choose depends on the network size
Authors: Nadini Matthieu , Rizzo Alessandro , Porfiri Maurizio 
Published: May 2020

AbstractFiltering information in complex networks entails the process of removing interactions explained by a proper null hypothesis and retaining the remaining interactions, which form the backbone network. The reconstructed backbone network depends upon the accuracy and reliability of the available tools, which, in turn, are affected by the specific features of the available dataset. Here, we examine the performance of three approaches for the discovery of backbone networks, in the presence of heterogeneous, time-varying node properties. In addition to the recently proposed evolving activity driven model, we extend two existing approaches (the disparity filter and the temporal fitness model) to tackle time-varying phenomena. Our analysis focuses on the influence of the network size, which was previously shown to be a determining factor for the performance of the evolving activity driven model. Through mathematical and numerical analysis, we propose general guidelines for the use of these three approaches based on the available dataset. For small networks, the evolving temporal fitness model offers a more reasonable trade-off between the number of links assigned to the backbone network and the accuracy of their inference. The main limitation of this methodology lies in its computational cost, which becomes excessively high for large networks. In this case, the evolving activity driven model could be a valid substitute to the evolving temporal fitness model. If one seeks to minimize the number of links inaccurately included in the backbone network at the risk of dismissing many links that could belong to it, then the temporal disparity filter would be the approach-of-choice. Overall, our contribution expands the toolbox of network discovery in the technical literature and should help users in choosing the right network discovery instrument, depending on the problem considered.
Welcome to JPhys Complexity
Authors: Bianconi Ginestra 
Published: May 2020

Abstract

JPhys Complexity is a new open access journal reporting high-quality quantitative research in complexity. Complexity pervades natural and man-made systems including the brain, the climate, society and the economy; and requires a highly interdisciplinary approach at the frontiers between physics, mathematics, computer science, biology, economics and the social sciences. JPhys Complexity will showcase exciting new research in this cutting-edge field and provide a platform for research favouring the exchange of knowledge between different disciplines.