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Journal of Advanced Simulation in Science and Engineering最新文献

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The Particle-In-Cell simulation on LEO spacecraft charging and the wake structure using EMSES 基于EMSES的低轨道航天器充电和尾流结构的粒子胞内仿真
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.21
Nizam Ahmad, H. Usui, Y. Miyake
{"title":"The Particle-In-Cell simulation on LEO spacecraft charging and the wake structure using EMSES","authors":"Nizam Ahmad, H. Usui, Y. Miyake","doi":"10.15748/JASSE.6.21","DOIUrl":"https://doi.org/10.15748/JASSE.6.21","url":null,"abstract":"The spacecraft in space is exposed to charged particle bombardment leading to significant charging and distorting the wake structure. The complexity of interaction between spacecraft and particle is difficult to assess, thus needs to be resolved numerically using appropriate method. Electro Magnetic Spacecraft Environment Simulator (EMSES) was developed based on Particle-in-Cell (PIC) which treated not only electrostatic phenomena but also selfconsistent analysis of electromagnetic effects on the spacecraft surfaces. We employed EMSES to simulate the charging of ERS-1 spacecraft and its influence on the vicinity of the spacecraft in low Earth orbit (LEO) environment. We focused on the floating potential of the spacecraft and the wake structure in the downstream region of the spacecraft. We also present the contribution of electric field to drive the ion trajectory passing through the sheath edge of the spacecraft.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67359678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
MMLPA: Multilayered Metamaterial Low Profile Antenna for IoT Applications MMLPA:物联网应用的多层超材料低轮廓天线
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.273
Tojoarisoa Rakotoaritina, Megumi Saito, Zhenni Pan, Jiang Liu, S. Shimamoto
{"title":"MMLPA: Multilayered Metamaterial Low Profile Antenna for IoT Applications","authors":"Tojoarisoa Rakotoaritina, Megumi Saito, Zhenni Pan, Jiang Liu, S. Shimamoto","doi":"10.15748/JASSE.6.273","DOIUrl":"https://doi.org/10.15748/JASSE.6.273","url":null,"abstract":"Nowadays, within the concept of Internet of Things (IoT), smart homes, smart factory, intelligent transportation, smart agriculture networks among others, are infrastructure systems that connect our world to the Internet. However, wireless communications technology, such as wireless cellular networks, wireless area networks, wireless sensor networks, and vehicular communications among others, are considerably constrained by complicated structures, and lossy media in complex environments. Fundamental limitations on the transmission range have been treated to connect IoT devices in complex environments. In order to extend the transmission range in complex environments, Magnetic Induction (MI) communication has been proved to be an efficient solution. In this thesis, Multilayered Metamaterial Low Profile Antennas (MMLPA) using Magnetic Induction communication scheme are designed and prototyped for IoT applications. The channel model of the MMLPA system is analyzed. Then four models of MMLPA system are designed by using circular loop antennas backed with isotropic metamaterial which is considered as Defected Ground Structure (DGS) as well as with anisotropic metamaterial for the purpose of dielectric uniaxial metamaterial. To the best of our knowledge, this is the first work that investigates the performance of a magnetic loop antenna coil backed with multiple layers of isotropic and anisotropic metamaterials for IoT applications in environment that are hostile, RF challenged, and especially in the vicinity of metal. By using a full-wave finite-element method, the proposed analysis is supported with simulation results where good agreement is achieved compared to the measurement results after realizing four prototypes of the MMLPA antennas. The effect of the presence of metal in the vicinity of the transceivers is also analyzed. A MMLPA-IoT system is developed for IoT applications.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15748/JASSE.6.273","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67359302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Numerical simulation on generation and propagation of vortex synchrotron radiation 涡旋同步辐射产生与传播的数值模拟
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.75
M. Hosaka
{"title":"Numerical simulation on generation and propagation of vortex synchrotron radiation","authors":"M. Hosaka","doi":"10.15748/JASSE.6.75","DOIUrl":"https://doi.org/10.15748/JASSE.6.75","url":null,"abstract":"It was theoretically shown that a single free electron in circular/spiral motion emits optical vortex. Such process can be found in relativistic electron beam crossing a helical undulator and the emitted radiation is known as undulator radiation. We have carried out experimental studies to characterize the synchrotron radiation at the UVSOR-III electron storage ring. We also have performed numerical simulations of the radiation process using a code Synchrotron Radiation Workshop (SRW), widely used in the synchrotron radiation community. The simulation reproduces the radiation properties very well. The simulation is expected to predict further characteristics of undulator radiation as optical vortex.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Special Issue on Recent Advances in Simulation in Science and Engineering — Post-conference proceedings for JSST2018 — 科学与工程模拟的最新进展特刊- JSST2018年会议论文集
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.I
Susumu Fujiwara
{"title":"Special Issue on Recent Advances in Simulation in Science and Engineering — Post-conference proceedings for JSST2018 —","authors":"Susumu Fujiwara","doi":"10.15748/JASSE.6.I","DOIUrl":"https://doi.org/10.15748/JASSE.6.I","url":null,"abstract":"","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15748/JASSE.6.I","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microwave analysis based on parallel finite element method 基于并行有限元法的微波分析
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.215
A. Takei, Isamu Higashi, M. Aikawa, Tomonori Yamada
{"title":"Microwave analysis based on parallel finite element method","authors":"A. Takei, Isamu Higashi, M. Aikawa, Tomonori Yamada","doi":"10.15748/JASSE.6.215","DOIUrl":"https://doi.org/10.15748/JASSE.6.215","url":null,"abstract":"With the expansion of electromagnetic field analysis using computers, large spaces that include complex shapes have also become an analysis target, and the development of a high-accuracy analysis is required for these problems. Therefore, in the present study, Berenger’s PML, which is currently the most effective absorbing boundary condition, is applied to the parallel finite element method based on the domain decomposition method, which is an effective analysis method for the microwave band. As a basic study, we developed an analysis code using a parallel finite element method based on the iterative domain decomposition method. In verifying the accuracy of the analysis code, we analyzed TEAM Workshop Problem 29, which is a benchmark problem, and confirmed that a highly accurate solution is obtained. Next, a model with Berenger’s PML added to the dipole antenna model is used as an analysis object, and the absorption performance of the PML is evaluated using a reflection coefficient based on the S parameter. Moreover, the accuracy of the antenna analysis is evaluated by comparing the directivity of the dipole antenna with the theoretical solution. As a result, the effectiveness of the proposed method for microwave analysis is confirmed.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15748/JASSE.6.215","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67359285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Pseudoelastic mesh–moving using a general scenario of the selective mesh stiffening 采用假弹性网格移动的一般方案，选择网格加劲
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.67
D. Ishihara, A. Goto, M. Onishi, T. Niho, T. Horie
{"title":"Pseudoelastic mesh–moving using a general scenario of the selective mesh stiffening","authors":"D. Ishihara, A. Goto, M. Onishi, T. Niho, T. Horie","doi":"10.15748/JASSE.6.67","DOIUrl":"https://doi.org/10.15748/JASSE.6.67","url":null,"abstract":"The selective mesh stiffening in this study changes the stiffness of the element based on both the element area and shape. It includes the stiffening in the previous studies as a specific case, and leads to a general scenario in the pseudoelastic mesh–moving. This scenario gives better mesh quality in the mesh-moving of a rectangular domain with a structure consisting of a square and a fin undergoes large rotations. This is because the shear deformation of the element is adaptively considered.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67359876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
New quasi-stable ratios of particles in nature revealed by multi-dimensional Taylor approximation 多维泰勒近似揭示了自然界中新的粒子准稳定比
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.80
Tomotaka Kobayashi, K. Naitoh
{"title":"New quasi-stable ratios of particles in nature revealed by multi-dimensional Taylor approximation","authors":"Tomotaka Kobayashi, K. Naitoh","doi":"10.15748/JASSE.6.80","DOIUrl":"https://doi.org/10.15748/JASSE.6.80","url":null,"abstract":"Quasi-stable ratios are defined as making stability which weaker than neutral stability. Various quasi-stable ratios including new ones are quantitatively revealed by performing multi-dimensional Taylor approximation for the momentum equation describing deformation and translational motions of connected flexible particles, although our previous reports based on one-dimensional Taylor approximation cannot. Quasi-stable ratios including about 2:3 which close to golden and silver ratios and 1:1 are identical to size ratios seen in replication of biological molecules (e.g. nitrogenous base pairs and amino acids) and fission of uranium atoms.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
River channel networks created by Poisson Equation and Inhomogeneous Permeability Models (II): Horton's law and fractality 由泊松方程和非均匀渗透率模型创建的河道网络(II):霍顿定律和分形
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/jasse.6.386
Hiroshi Serizawa, T. Amemiya, K. Itoh
{"title":"River channel networks created by Poisson Equation and Inhomogeneous Permeability Models (II): Horton's law and fractality","authors":"Hiroshi Serizawa, T. Amemiya, K. Itoh","doi":"10.15748/jasse.6.386","DOIUrl":"https://doi.org/10.15748/jasse.6.386","url":null,"abstract":"","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67360145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Three-Dimensional Shape Modelling of Metal Foam with Rounded Cells by Implicit Surfaces 圆孔金属泡沫的隐式曲面三维造型
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.195
Yuya Hanaoka, Momoko Nojiri, T. Itoh, S. Nakata, Keiko Watanabe
{"title":"Three-Dimensional Shape Modelling of Metal Foam with Rounded Cells by Implicit Surfaces","authors":"Yuya Hanaoka, Momoko Nojiri, T. Itoh, S. Nakata, Keiko Watanabe","doi":"10.15748/JASSE.6.195","DOIUrl":"https://doi.org/10.15748/JASSE.6.195","url":null,"abstract":"To construct a model of metal foam that has rounded cells such as a real one, an implicit surface based modelling method has been proposed. In this method, uniformed points are first generated randomly by Poisson-disk sampling, and a Voronoi diagram is constructed from the points. In addition, an implicit function f (x) is generated in each of Voronoi cells by setting some constraints appropriately. An implicit surface is represented as f (x) = 0, and the constraints are set so that f (x) = 0 is generated inside each of Voronoi cells. In this model, walls of metal foam are represented by space between implicit surfaces of adjacent Voronoi cells. Rounded walls that have various thicknesses can be constructed by adjusting the constraints. In addition, the walls can be converted to a solid model constructed as tetrahedra filling the space.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15748/JASSE.6.195","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67359424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Arbitrary Viewpoint Visualization for Teleoperation of Disaster Response Robots 灾害响应机器人远程操作的任意视点可视化
IF 0.5
Journal of Advanced Simulation in Science and Engineering Pub Date : 2019-01-01 DOI: 10.15748/JASSE.6.249
Masataka Fuchida, Shota Chikushi, Alessandro Moro, A. Yamashita, H. Asama
{"title":"Arbitrary Viewpoint Visualization for Teleoperation of Disaster Response Robots","authors":"Masataka Fuchida, Shota Chikushi, Alessandro Moro, A. Yamashita, H. Asama","doi":"10.15748/JASSE.6.249","DOIUrl":"https://doi.org/10.15748/JASSE.6.249","url":null,"abstract":"In this work, we propose an arbitrary viewpoint visualization system for disaster response robots. Robot operation from safety areas using teleoperation is highly desirable. To provide sufficient information, it is common to employ multiple displays, however, this often reduces operability. To avoid reduced operability we integrate all acquired images into a single bird eye view. The system is also capable of moving this viewpoint to any arbitrary position for ease of operation, and to overlay a computer-generated image of the robot that is synchronized to match the real robot pose onto the generated view when necessary. Experiments confirmed pose synchronization, generation of views from arbitrary positions, as well as improved operability.","PeriodicalId":41942,"journal":{"name":"Journal of Advanced Simulation in Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15748/JASSE.6.249","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67359540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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