68 research outputs found
Electromagnetic field scattering of a high speed moving source and its application
No full textThis paper presents the electromagnetic (EM) field scattering of a high speed moving source and a moving target by using Finite-Difference Time-Domain (FDTD) with Overset Grid Generation (OGG) method. The analysis is conducted for 750MHz band at the street intersection with OpenMP parallel processing technique. The performance of this proposed method is verified with theoretical results. The simulation results have shown comparatively good agreement in moving and stationary case. The proposed simulation study is of great importance to ground transportation in Intelligent Transportation System (ITS) applications
Numerical analysis of the electromagnetic wave scattering from a moving dielectric body by Overset Grid Generation method
No full textNumerical technique for wireless communication system with high speed movement
No full textNumerical technique for the analysis of EM field with high speed moving dielectric body by using FDTD method with Overset Grid Generation method considering Lorentz transformation is presented. The characteristic of EM field when incident wave hits the moving dielectric body with high velocity value are analyzed. The accuracy of the proposed technique is validated. Good agreements are obtained between numerical results and theoretical results. The development of this numerical technique will give a great impact for many areas, particularly for the future high speed mobile communication systems used in transportation and aerial radar systems to detect the high speed motion of a moving boundar
Numerical analysis of the EM field from a moving source and the application for a moving vehicle
No full textMany practical engineering applications require the numerical solution for the analysis of the EM field by a moving source and/or a moving body. We have previously proposed the Overset Grid Generation method coupled with FDTD method for the analysis of the EM field with moving boundaries considering Doppler Effect. By overlapping one moving sub-mesh on a static main mesh, each mesh is calculated alternately by using interpolation technique. For higher velocity value, Lorentz transformation is applied to the FDTD method. In this paper, after verifying the accuracy of this technique, it is applied for the EM field at an intersection when the input source is moving towards the moving vehicle
The development of novel numerical technique for the analysis of the moving vehicle and moving source
No full textThe numerical technique for the analysis of the electromagnetic field with moving body or a moving source are required for the effective modeling of new optical devices or microwave devices and also mobile communication field. We have previously proposed the Overset Grid Generation method coupled with FDTD method for the analysis of the EM field with moving boundaries considering Doppler Effect. For higher velocity value, Lorentz transformation is applied to the FDTD method. The time components that were changed in Lorentz transformation are fixed by using linear interpolation scheme in the Overset Grid Generation method. This allows a coherent point in time component with the FDTD method, which is an important element of this proposed numerical techniqu
Evolution and Future of Serious Game Technology for Older Adults
No full textSerious games play a key role in the medical field, particularly in enhancing cognitive abilities in the elderly. However, the sensory organs of the elderly decline over time, and the intervention effect of traditional serious games for older adults. The objective of this study is to identify the evolution and current problems of serious game technology for the elderly by using bibliometric analysis. We selected 319 relevant documents from 2013 to 2024 from the Web of Science (WOS) database. This study uses Publish or Perish (Windows GUl Edition) and VOSviewer (1.6.20) for performance analysis and scientific charting. We deeply analyze the early trends, emerging technologies, and publication trends, including citations and journals, subject areas, and regional and institutional. Here, we identified serious games for older adults rely heavily on visual presentation, often utilizing screens for screening, rehabilitation, and therapeutic interventions. This may cause further visual impairment in older adults who are experiencing visual decline. In addition, we proposed the combination of rich tactile feedback and external devices as one of the effective solutions to the current problems for future research
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