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USNC-URSI Radio Science Meeting (Joint with AP-S Symposium)

作者： I-Fong Chen Chia-Mei Fei-Lung Wu Jian-An Xie Dept. of Computer and Communication School of Electronics and Electrical Engineering Dongguan Polytechnic Jinwen University of Science and Technology New Taipei City Taiwan Department of Communications Engineering Feng Chia University Taichung City Taiwan Ph.D. Program of Electrical and Communications Engineering Feng Chia University Taichung City Taiwan

ISBN: (数字)9789463968119

ISBN: (纸本)9798350359497

The proposed antenna with a size of 90 mm x 90 mm, and the ground portion is 64 mm x 64 mm, which material is FR4 glass epoxy substrate with the thickness of 1.6 mm, relative permittivity of 4.3 and loss tangent of 0.023, consists of four modified dipole elements and four power dividers, as shown in Figure. 1. For the multi-band and broadband operation, three dipole antennas were shunted to be a dipole element. The electrical-length of the dipole element can be determined from the one quarter-wave length at the 2.45 GHz, 5.5 GHz and 6.525 GHz, for covering 2400 MHz-2500 MHz, 5150 MHz-5850 MHz and 5925 MHz-7125 MHz. In order to operates in various modes such as normal mode and axial mode, the modified four port triple-band microstrip series power divider was designed. In normal mode, it radiates horizontally polarized waves where as in axial mode, it radiates circularly polarized waves. The radiated patterns of the proposed antenna as shown in Figure. 2. The features of the proposed antenna are shown in the Table I. Impressive radiated gains and efficiencies are obtained.

关键词： Power dividers dipole antennas Conferences Glass Broadband communication Broadband antennas Microstrip

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Investigation of Induced EFT Transient Noise and Effect on Chip and Package Level 13

Investigation of Induced EFT Transient Noise and Effect on C...

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13th Asia-Pacific International Symposium on Electromagnetic Compatibility and Technical Exhibition, APEMC 2022

作者： Lin, Han-Nien Ho, Tzu-Hao Syu, Wan-Yu Wei, Yu-Ming Lee, Yueh-Hsun Ye, Qain-Yu Huang, Cheng-Hao Ku, Yuan-Fu Lin, Liang-Yang Lin, Jeffreyyen-Ting Feng Chia University Department of Communications Engineering Taichung City Taiwan Ph.D. Program of Electrical and Feng Chia University Communications Engineering Taichung City Taiwan Electronics Testing Center Taiwan Ministry of Economic Affairs Bureau of Standards Taipei City Taiwan ECE. University at Albany New York United States

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

This paper investigates the noise induced from EFT Burst transient IEC61000-4-4 on the chip and package levels and analyzes its degradation effect. We first introduce the EFT Burst transient generator model previously established published with ANSYS designer, which has later been adopted into ANSYS Electronics desktop serving for immunity effect and protection measure analysis. We then describe how electromagnetic simulations can provide chip-level immunity analysis for IEC 62215-3. The analysis of EFT pulse propagation can be extended to package level with its impact on clock waveforms of different frequencies. With the help of established model, the residual transient noise energy due to normally found decoupling capacitor will be observed to show its effectiveness on noise filtering and the significant benefits to EMS protection. This study intends to provide an efficient simulation model to help IC and package designers enhancing their design capability against EFT disturbance. © 2022 IEEE.

关键词： Electromagnetic simulation

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Visual Field Examination Technology Based on Semi-transparent Elliptical Mirror

Visual Field Examination Technology Based on Semi-transparen...

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Educational Innovation (ECEI), IEEE Eurasian Conference on

作者： Chao-Kai Chang Chun-Yu Chiang Feng-Ming Yeh Chi-Hung Lee Chuen-Lin Tien der-Chin Chen Department of Optometry Yuanpei University of Medical Technology Hsinchu Taiwan Ph.D. Program of Electrical and Communications Engineering Feng Chia University Taichung Taiwan Department of Electrical Engineering Feng Chia University Taichung Taiwan

In this study, the human visual field test technology is established by using an optoelectrical system consisting of a translucent ellipsoid, an area light source, and a landscape scene with an indicator. during the test, the subjects stared at the indicator directly in front of them with one eye and kept their eyeballs still, scanning the light strip with peripheral vision and using the mouse button plus the playback program to record the start and end positions of the scanning light strip in the landscape scene. This method is tested subjectively, and the subject needs to respond during the test. Therefore, before the test, the subject needs to understand the test process and be trained in advance to improve the exam accuracy. In the experiment, fifteen subjects with normal vision and no eye disease were selected. Their visual fields were confirmed normal after a preliminary assessment. The test results showed that the subjects' eyes were within the normal visual field, indicating that this method was feasible. In this research, a digital optical platform for the near visual field is proposed to establish an optoelectric visual field measurement technology. The proposed method is characterized by small size, rapid operation, and easy portability. With the digital LCd and visual imaging technology, both dynamic and static visual fields can be tested. The test data on the eyes' upper, lower, nasal, and temporal sides were consistent with the normal visual field. This shows that this method is feasible and worthy of promotion in the optometry industry.

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danceOnStage: positioning training of dancing stage performance in virtual reality

DanceOnStage: positioning training of dancing stage performa...

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IEEE International Conference on Artificial Intelligence and Virtual Reality (AIVR)

作者： Ssu-Hsuan Wu Kai-Ting Wang Chia-Chen Chiang Hsin-Yu Chang Cheng-Yun Yeh Min-Chun Hu International Intercollegiate Ph.D.Program National Tsing Hua University Hsinchu Taiwan Master of Computer Science Program National Tsing Hua University Hsinchu Taiwan Interdisciplinary Program of Electrical Engineering and Computer Science National Tsing Hua University Hsinchu Taiwan Interdisciplinary Program of Technology and Art National Tsing Hua University Hsinchu Taiwan National Tsing Hua University Hsinchu Taiwan

This research aims to create a virtual reality-based practice system that simulates real-stage performance environments, assisting amateur dancers in overcoming stage fright and practicing group choreography that is difficult to achieve during individual practice. In this study, users can engage in performance simulations within the created system using the HTC VIVE virtual reality device. Within the system, we have developed a virtual stage space system that only requires a 2m x 3.5m physical area to simulate a large virtual stage experience. Users can also simulate choreographic positioning with virtual dance partners within this system, providing amateur dancers with group dance rehearsal practice opportunities that are not feasible during solo practice. Additionally, by creating three different audience modes, we aim to help users simulate various audience scenarios they may encounter during a performance. The system includes a recording feature that captures users' simulated performances, allowing them to review their actions and receive feedback after practice.

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Color Refractive Error Exam for Speech disorder

Color Refractive Error Exam for Speech Disorder

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2022 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2022

作者： Yeh, Feng-Ming Huang, Liang-Ying Chiang, Chun-Yu Chang, Rong-Seng Tien, Chuen-Lin Hsieh, Ya-Hui Chen, der-Chin Yuanpei University of Medical Technology Department of Optometry Hsinchu Taiwan National Central University Department of Optics and Photonics Taoyuan Taiwan Feng Chia University Ph.D. Program of Electrical and Communications Engineering Taichung Taiwan Feng Chia University Department of Electrical Engineering Taichung Taiwan Ming Chuan University Department of Healthcare Information and Management Taoyuan Taiwan

ISBN: (纸本)9798350332421

In this study, a micro-led display, an eye chart player software, and image capture and processing module were used to construct a color refractive error exam for subject with speech disorder. This method can be used to test subjects with refractive errors, eye's color vision and other pathological problems. The micro-led display uses an eye chart player program to display the capital letters E and the other fonts, and the gaps of the E letters can be tumbled in any direction. When subjects with speech disorder were examined for vision, the E chart was displayed sequentially from big letters to small letters, and the image capture and processing module was synchronized with the eye chart player program. The subjects only need to point out the direction of the gap with gestures, and the image capture and processing module can simultaneously capture the gestures of the subjects to judge visual test status. In this study, twenty subjects were tested and all obtained the correct VA value and wore excellent eye glasses. The characteristic of this innovative method is that the subjects with a speech disorder can use simple hand gestures to complete the visual exam through the image capture and processing module during the inspection. © 2022 IEEE.

关键词： Color

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Compact Refractive Error Measuring device

Compact Refractive Error Measuring Device

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Educational Innovation (ECEI), IEEE Eurasian Conference on

作者： Feng-Ming Yeh Chun-Yu Chiang Chao-Kai Chang Hsuan-Fu Wang Chuen-Lin Tien der-Chin Chen Department of Optometry Yuanpei University of Medical Technology Hsinchu Taiwan Ph.D. Program of Electrical and Communications Engineering Feng Chia University Taichung Taiwan Department of Aeronautical Engineering National Formosa University Yunlin Taiwan Department of Electrical Engineering Feng Chia University Taichung Taiwan

In this study, a reflective aspheric optical system is used to establish an eye examination device for distance and near vision tests. The system includes a micro-display with a rotating device, an off-axis parabolic mirror, an off-axis ellipsoid mirror, a chin-fixing bracket, and vision software. The display contents of the micro-display include English C and E charts, Chinese words, graphics, and animation. The off-axis parabolic mirror and off-axis ellipsoid mirror are confocal, and the micro-display is placed at the confocal point. The micro-display is projected through an off-axis parabolic mirror for myopia's distance vision testing, and an off-axis elliptical mirror for myopia's near vision testing. Others, the graphics and animation, provide visual checks for young children. In addition, CCd cameras and AI recognition can be used as visual examinations for people with language impairment. In this study, twenty-five subjects with the refractive error were tested using E-chart and this device to obtain the decimal point VA value, and the trial frame and lens were used to obtain the diopter of glasses. The date of the experimental results was used as a reference value for ophthalmological examination. This system uses an off-axis parabolic mirror and an off-axis ellipsoidal mirror. Optical alignment is a challenge to solve for the system. Students participating in the study obtained good optics training. The advantages of the developed device include the convenience to carry with a multi-purpose and straightforward use.

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An Overlapping and Leading Edge detection Combined Technique for distance Estimation under High-Background Lights in a Pulsed-LidAR System 21

An Overlapping and Leading Edge Detection Combined Technique...

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3rd International Electronics Communication Conference, IECC 2021

作者： Nguyen, Thanh-Tuan Cheng, Ching-Hwa Liu, don-Gey Tran, Song-Toan Le, Minh-Hai Ph.D. Program of Electrical and Communications Engineering Feng Chia University Taichung40724 Taiwan Kien Giang College Kien Giang91000 Viet Nam Department of Electronic Engineering Feng Chia University Taichung40724 Taiwan

ISBN: (纸本)9781450389938

In this paper, we implemented a direct Time of Flight (ToF) method to calculate the distance of a pulsed-LidAR in high background lights on a Red Pitaya platform. In this proposed system, we utilized the Red Pitaya Kit to simulate the generation of LidAR pulses. Another Kit used to capture, process data, and estimate the distance. Signals are acquired, including high-intensity background noise because LidARs are requested to work in worse environments like sunlight, electric light, fog, etc. To overcome this problem, we proposed an Overlapping-edge (OE) technique to be combined with the Leading-edge (LE) method to detect pulses in noisy environments. Moreover, the sampling rate of the AdC in this platform was limited to 125Msps. Therefore, we performed an interpolation algorithm, namely Center of Mass (CoM), to increase the accuracy of the estimated distance. The experiment was performed on simulated signals with a signal-to-noise ratio of-8.5dB. The obtained result showed that the average success rate of measurements increased 7.56% compared with the Leading-edge method and the average accuracy reached nearly 7.1cm. In conclusion, we have built a high noise Pulse-LidAR source and calculate distance on a Red Pitaya platform with a low cost and highly stable accuracy. The performance of a LidAR system was also evaluated in this study. © 2021 ACM.

关键词： Signal to noise ratio

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Immediate Effects of Vergence Exercises Using Automatic dual Rotational Risley Prisms on Accommodative Lag and Facility

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Ophthalmology and Therapy 2023年第6期12卷 3361-3372页

作者： Huang, Shuan-Yu Su, Hui-Rong Hu, Yun-Shao Lee, Chi-Hung Tsai, Ming-Shan Yeh, Shang-Min Chen, Ya-Yu Tsai, Tzu-Hsun Department of Optometry Central Taiwan University of Science and Technology Taichung 402 Taiwan Ph.D. Program of Electrical and Communications Engineering Feng Chia University Taichung 407 Taiwan Department of Optometry Chung Shan Medical University Taichung 402 Taiwan Department of Electrical Engineering Feng Chia University Taichung 407 Taiwan Department of Electrophysics National Chiayi University Chiayi 600 Taiwan Department of Optometry Da-Yeh University Changhua 515 Taiwan Department of Ophthalmology National Taiwan University Hospital Hsin-Chu Branch Hsin-Chu Taiwan Department of Ophthalmology National Taiwan University Hospital Taipei City 100225 Taiwan

Introduction: This study evaluated novel automatic dual rotational Risley prisms (AdRRPs) as a vergence exercise tool for patients with myopia to improve accommodative lag and accommodative facility. Methods: Participants with myopia aged 20–24 years were recruited. After vergence exercises with prisms (treatment group) or plano lenses (control group) using AdRRPs for 10 min, measurements were taken using an open-field autorefractor (Grand Seiko WAM-5500) at viewing distances of 0.4 m and 6.0 m. We measured accommodative facility using a ± 2.00 d accommodative flipper. Results: A total of 56 participants (treatment group, 39;control group, 17) performed vergence exercises using AdRRPs. Participants in the treatment group showed improvements in accommodative lag at a 0.4 m viewing distance, with measurements of 0.57 d (right eye;Od) and 0.53 d (left eye;OS) and 0.21 d (Od) and 0.27 d (OS) before and after the exercises, respectively (p < 0.001). Over-refractions using an open-field autorefractor with spherical equivalent contact lenses at a 6.0 m viewing distance were − 0.01 ± 0.30 d (Od) and 0.03 ± 0.34 d (OS) and 0.15 ± 0.32 d (Od) and 0.19 ± 0.28 d (OS) before and after the exercises, respectively (difference + 0.16 d;p < 0.001). Accommodative facility values before and after exercises were 14.88 ± 3.36 and 15.59 ± 3.60 cpm, respectively (p < 0.01). No significant differences in accommodative lag, relaxation, and accommodative facility before and after exercise were observed in the control group. Conclusions: Using AdRRPs in vergence exercises can improve accommodative lag, accommodative facility, and accommodative relaxation in adults with myopia. Further research to evaluate persistent and long-term effects is needed. © 2023, The Author(s).

关键词： Accommodative facility Accommodative lag Automatic dual rotational Risley prisms (AdRRPs) Vergence exercise

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CsPbBr3 perovskite quantum-dot paper exhibiting a highest 3 dB bandwidth and realizing a flexible white-light system for visible-light communication

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photonics Research 2021年第12期9卷 2341-2350页

作者： KONTHOUJAM JAMES SINGH XIAOTONG FAN ANNAdA SANKAR SAdHU CHUN-HO LIN FANG-JYUN LIOU TINGZHU WU YU-JUNG LU JR-HAU HE ZHONG CHEN TOM WU HAO-CHUNG KUO Department of Photonics&Institute of Electro-Optical Engineering College of Electrical and Computer EngineeringNational Yang Ming Chiao Tung UniversityHsinchu 30010Taiwan International Ph.D.Program in Photonics(UST) College of Electrical and Computer EngineeringNational Yang Ming Chiao Tung UniversityHsinchu 30010Taiwan Department of Electronic Science Fujian Engineering Research Center for Solid-State LightingXiamen UniversityXiamen 361005China School of Materials Science and Engineering University of New South WalesSydneyNSW 2052Australia Research Center for Applied Sciences Academia SinicaTaipei 11529Taiwan Department of Materials Science and Engineering City University of Hong KongKowloon TongHong KongChina

We propose a flexible white-light system for high-speed visible-light communication(VLC)applications,which consists of a semipolar blue InGaN/GaN single-quantum-well micro-light-emitting diode(LEd)on a flexible substrate pumping green CsPbBr3 perovskite quantum-dot(PQd)paper in nanostructure form and red CdSe Qd *** highest bandwidth for CsPbBr3 PQd paper,229 MHz,is achieved with a blue micro-LEd pumping source and a high data transmission rate of 400 Mbps;this is very promising for VLC *** 817 MHz maximum bandwidth and a 1.5 Gbps transmission speed are attained by the proposed semipolar blue *** proposed flexible white light system and the high-bandwidth PQd paper could pave the way for VLC wearable devices.

关键词： pumping communication quantum

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design of Optical System of Augmented Reality Near Eye device

Design of Optical System of Augmented Reality Near Eye Devic...

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Educational Innovation (ECEI), IEEE Eurasian Conference on

作者： Chao-Kai Chang Feng-Ming Yeh Jiann-Hwa Lue Hsuan-Fu Wang Ya-Hui Hsieh Chun-Yu Chiang der-Chin Chen Chuen-Lin Tien Department of Optometry Yuanpei University of Medical Technology Hsinchu Taiwan Department of Optometry Taiwan University of Science and Technology Taichung Taiwan Department of Aeronautical Engineering National Formosa University Yunlin Taiwan Department of Healthcare Information and Management Ming Chuan University Taoyuan Taiwan Ph.D. Program of Electrical and Communications Engineering Feng Chia University Taichung Taiwan Department of Electrical Engineering Feng Chia University Taichung Taiwan

Augmented reality (AR) is a technology that instantly merges digital pictures with the real scene. The perspective near-eye display is a key module of AR, through which computer-generated pictures or videos can be displayed in the existing environment. The purpose of this research is to establish the system structure of an augmented reality near-eye display device and to design the off-axis two-piece reflective aspherical mirror. Because AR glasses are wearable and are worn close to the eyes, not only the optical performance of the display but also the clear vision of the user needs to be considered. In this study, an off-axis two-piece reflective aspherical mirror is used as the optical system of the AR for displaying the digital image. The micro-display is placed at the focal point of the optical system to form a digital image, and the horizontal movement of the micro-display along the optical axis is controlled by a precise displacement mechanism so that the patient with uncorrected myopia or hyperopia can see the digital picture and real scene. Because the right and left micro-displays move horizontally independently, the user can see the images on the AR device, which becomes the biggest feature of this study.

关键词： Performance evaluation Technological innovation Optical design digital images Optical imaging Optical reflection Augmented reality

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