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Light-Emitting Devices, Materials, and Applications XXIX 2025

作者： Lin, Ching-Fuh Chiu, Hao-Sung Tsai, Chih-Yuan Wu, Chen-Hsun Chen, Shan-Yu Yang, Tzu-Yi Kung, Yu-Han Lee, Ting-Chun Wang, Guan-Wen Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei Taiwan Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Graduate School of Advanced Technology National Taiwan University Taipei Taiwan

ISBN: (纸本)9781510685208

Micro-LED is a highly anticipated next-generation display technology, recognized for its high brightness and resolution, making it a promising candidate for future applications in the augmented reality field. The color conversion technique utilized in this study for Micro-LED fabrication addresses issues related to time-consuming mass transfer and the challenge of achieving smaller pixel sizes (5 μm). Unlike other color conversion materials, such as quantum dots and perovskites, the novel hybrid color conversion material we employed is free of rare earth elements and other harmful substances, while also exhibiting high environmental stability. When the array thickness is reduced to 2 μm, the optimal color conversion efficiency (CE) for green light is achieved by doping with 25 wt % TiO2 particles sized at 170 nm, reaching a CE of 74.2 %. For red light, the optimal CE is achieved by doping with 25 wt % TiO2 particles sized at 240 nm, with a CE of 62.1 %. The fabrication process involves photolithography, which quickly patterns the spin-coated film, followed by etching to create the array. The high-resolution monochromatic conversion array density is 11548 PPI, and the full-color conversion array density is 5774 PPI. Each array pixel size is 1.4 μm, and it boosts a wide color gamut with a DCI-P3 gamut ratio of 149.73 % and a gamut coverage of 96.98 %. , © 2025 SPIE.

关键词： Perovskite

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Two-stage Optimization Scheduling of Distribution Networks Considering Power Quality 5

Two-stage Optimization Scheduling of Distribution Networks C...

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5th International Conference on Power engineering, ICPE 2024

作者： Bian, Ning Kawasaki, Shoji Meiji University Graduate School of Science and Technology Department of Electrical Engineering Kanagawa Japan Meiji University School of Science and Technology Department of Electronics and Bioinformatics Kanagawa Japan

ISBN: (纸本)9798331531140

This paper presents a novel two-stage optimization model for the scheduling of distributed generation (DG) in distribution networks, aiming to minimize operating costs and improve electricity quality. In the first stage, the model optimizes DG dispatch, considering factors such as market electricity prices, generation unit selection, and flexible load contract pricing. The second stage focuses on reactive power optimization, adjusting DG outputs and reactive power compensating devices to maintain voltage stability and reduce active power losses. To enhance the optimization process, an Hour-related particle swarm optimization (Hour-related PSO) algorithm is integrated, which leverages the continuity of optimal solutions between stages to accelerate convergence and reduce computational complexity. Simulations using the IEEE 33-node test system demonstrate that the proposed model, combined with Hour-related PSO, significantly lowers operational costs while improving voltage regulation and overall network performance. The results highlight the effectiveness of the approach in achieving optimal, cost-efficient dispatch and enhanced grid stability. © 2024 IEEE.

关键词： Power distribution networks

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Aerodynamic Effects Compensation on Multi-Rotor UAVs Based on a Neural Network Control Allocation Approach

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IEEE/CAA Journal of Automatica Sinica 2022年第2期9卷 295-312页

作者： Sarah P.Madruga Augusto H.B.M.Tavares Saulo O.D.Luiz Tiago P.do Nascimento Antonio Marcus N.Lima Graduate Program of Electrical Engineering Universidade Federal de Campina GrandeCampina Grande-PBBrazil Department of Electrical Engineering Universidade Federal de Campina GrandeCampina Grande-PBBrazil IEEE Department of Computer Systems Universidade Federal da ParaibaJoao Pessoa-PBBrazil

This paper shows that the aerodynamic effects can be compensated in a quadrotor system by means of a control allocation approach using neural ***,the system performance can be improved by replacing the classic allocation matrix,without using the aerodynamic inflow equations *** network training is performed offline,which requires low computational *** target system is a Parrot MAMBO drone whose flight control is composed of PD-PID controllers followed by the proposed neural network control allocation *** a quadrotor is particularly susceptible to the aerodynamics effects of interest to this work,because of its small *** compared the mechanical torques commanded by the flight controller,i.e.,the control input,to those actually generated by the actuators and established at the *** was observed that the proposed neural network was able to closely match them,while the classic allocation matrix could not achieve *** allocation error was also determined in both ***,the closed-loop performance also improved with the use of the proposed neural network control allocation,as well as the quality of the thrust and torque signals,in which we perceived a much less noisy behavior.

关键词： Aerodynamics effects control allocation minidrone multi-rotor UAV neural networks

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Ultrastrongly coupled and directionally nonreciprocal magnon polaritons in magnetochiral metamolecules

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Physical Review Applied 2025年第1期23卷 L011004-L011004页

作者： Kentaro Mita Takahiro Chiba Toshiyuki Kodama Tetsuya Ueda Toshihiro Nakanishi Kei Sawada Satoshi Tomita Department of Physics Graduate School of Science Tohoku University Sendai 980-8578 Japan Frontier Research Institute for Interdisciplinary Sciences Tohoku University Sendai 980-8578 Japan Department of Applied Physics Graduate School of Engineering Tohoku University Sendai 980-8579 Japan Institute for Excellence in Higher Education Tohoku University Sendai 980-8576 Japan Department of Electrical Engineering and Electronics Kyoto Institute of Technology Kyoto 606-8585 Japan Department of Electronic Science and Engineering Kyoto University Kyoto 615-8510 Japan RIKEN SPring-8 Center Sayo 679-5148 Japan

We experimentally demonstrate magnon polaritons with ultrastrong coupling and directional nonreciprocity in a metamolecule lacking time-reversal and space-inversion symmetries at room temperature. These experimental results are reproduced well via numerical simulations and theoretical considerations. Ultrastrong coupling is due to a direct interaction of magnons in the magnetic meta-atom with microwave photons confined in the chiral meta-atom as a resonator. Our results reveal a crucial step in identifying deep strongly coupled and optically moving magnon polaritons for hybrid quantum systems, synthetic gauge fields, and quasiparticle “chemistry” using metamaterials.

关键词： Phonons

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Security Risk Assessment for Patient Portals of Hospitals: A Case Study of Taiwan

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Risk Management and Healthcare Policy 2024年 17卷 1647-1656页

作者： Yeh, Pei-Cheng Yeh, Kuen-Wei Huang, Jiun-Lang Graduate Institute of Clinical Dentistry School of Dentistry College of Medicine National Taiwan University Taipei Taiwan Bureau Ministry of Justice New Taipei City Taiwan Department of Electrical Engineering Chinese Culture University Taipei Taiwan Department of Information Chinese Culture University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan

Background: Growing cyberattacks have made it more challenging to maintain healthcare information system (HIS) security in medical institutes, especially for hospitals that provide patient portals to access patient information, such as electronic health record (EHR). Objective: This work aims to evaluate the patient portal security risk of Taiwan’s EEC (EMR Exchange Center) member hospitals and analyze the association between patient portal security, hospital location, contract category and hospital type. Methods: We first collected the basic information of EEC member hospitals, including hospital location, contract category and hospital type. Then, the patient portal security of individual hospitals was evaluated by a well-known vulnerability scanner, UPGUARD, to assess website if vulnerable to high-level attacks such as denial of service attacks or ransomware attacks. Based on their UPSCAN scores, hospitals were classified into four security ratings: absolute low risk, low to medium risk, medium to high risk and high risk. Finally, the associations between security rating, contract category and hospital type were analyzed using chi-square tests. Results: We surveyed a total of 373 EEC member hospitals. Among them, 20 hospital patient portals were rated as “absolute low risk”, 104 hospital patient portals as “low to medium risk”, 99 hospital patient portals as “medium to high risk” and 150 hospital patient portals as “high risk”. Further investigation revealed that the patient portal security of EEC member hospitals was significantly associated with the contract category and hospital type (P<0.001). Conclusion: The analysis results showed that large-scale hospitals generally had higher security levels, implying that the security of low-tier and small-scale hospitals may warrant reinforcement or strengthening. We suggest that hospitals should pay attention to the security risk assessment of their patient portals to preserve patient information privacy. © 2024 Yeh et

关键词： electronic health record electronic medical record EMR Exchange Center healthcare information system security risk assessment vulnerability scanner

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Mechanism of Threshold Voltage Instability in Double Gate α-IGZO Nanosheet TFT under Bias and Temperature Stress

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IEEE Journal of the Electron Devices Society 2024年 12卷 464-471页

作者： Aslam, Muhammad Chang, Shu-Wei Chen, Yi-Ho Lee, Yao-Jen Li, Yiming Lee, Wen-Hsi Parallel and Scientific Computing Laboratory National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Electrical Engineering and Computer Science International Graduate Program National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Department of Electrical Engineering National Cheng Kung University Tainan City701401 Taiwan Institute of Pioneer Semiconductor Innovation Industry Academic Innovation School National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Department of Electronics and Electrical Engineering National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Institute of Communications Engineering National Yang Ming Chiao Tung University Hsinchu300093 Taiwan

Amorphous indium gallium zinc oxide (a-IGZO)-based thin film transistors (TFTs) are increasingly becoming popular because of their potential in futuristic applications, including CMOS technology. Given the demand for CMOS-compatible, ultra-scaled, reliable, and high-performing devices, we fabricate and analyze scaled-channel a-IGZO-TFTs with an optimal double-gate structure, a thin nanosheet-based channel, and an effective high- κ dielectric namely HfO2. The reliably reported double gate IGZO nanosheet TFTs (DG-IGZO-NS-TFTs) are tested under positive and negative bias stress at variant temperatures, and the resulting modulations are analyzed critically. The reported DG-IGZO-NSTFTs exhibit a negative side threshold voltage shift (Δ Vth) accompanied by an increase in Ion/Ion(0) under negative bias temperature stress (NBTS) at elevated temperatures, which indicates the presence of additional charges. An anomalous negative side shifting of the Vth is observed under positive bias temperature stress (PBTS), where diffused hydrogen atoms are identified as introducing excess n-type carriers into the channel and causing the observed Δ Vth. The spectroscopic analysis is performed to establish evidence for the assumed mechanisms, and the role of individual gates is investigated in the context of performance variance under temperature-bias stress. Moreover, the partial reversibility of the stress-induced degradation is experimentally established and methodically discussed. Overall, the reported results offer a comprehensive understanding of scaled-channel DG-NS-IGZO-TFTs, which help shape performance-enhancement strategies, control degradation mechanisms, and define appropriate application scenarios. © 2013 IEEE.

关键词： Thin film transistors

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Optimal Design of an In-Runner Direct-Drive Synchronous Permanent Magnet Starter/Generator for UAVs 6

Optimal Design of an In-Runner Direct-Drive Synchronous Perm...

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6th International Symposium on Multidisciplinary Studies and Innovative Technologies, ISMSIT 2022

作者： Arslan, Sami Iskender, Ires Navruz, Tugba Selcen Gazi University Graduate School of Natural and Applied Sciences Department of Electrical and Electronics Engineering Ankara Turkey Cankaya University Department of Electrical and Electronics Engineering Ankara Turkey Gazi University Department of Electrical and Electronics Engineering Ankara Turkey

ISBN: (数字)9781665470131

ISBN: (纸本)9781665470131

The aim of improving efficiency, safety, and reliability as part of more-electric-aircraft initiatives is mediating the rapid development of aerospace systems. In addition, the increasing need for leadership in the sociomilitary-economic area brings the focus of studies on unmanned aerial vehicles in aviation. However, developments in power electronics and control algorithms, permanent magnets, high-speed transmission elements, and iron core material technologies reveal the need for using Starter/Generator structures in hybrid propulsion systems. This paper explores the optimum design of an In-runner Synchronous Permanent Magnet Starter/Generator with specifications of 1 kW-4500 rpm for motor mode and 1.25 kW-5500 rpm for generator mode, especially for small UAVs equipped with a piston engine. Thus, charging the battery packs and the required thrust can be provided with higher efficiency. The preliminary dimensions are obtained analytically. The design issues of materials and topologies are discussed. The novel model is optimised in Ansys Maxwell 2D based on finite element analyses. Dynamic and static simulations are performed with the optimetric sensitivity method, and the efficiency study is carried out in Maxwell 3D. The data obtained as a result of analytical and numerical calculations are verified. © 2022 IEEE.

关键词： Permanent magnets

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A Developed PLL Control Technique for Distorted and Unbalanced Grid Voltages with a Three-Level NPC Converter-Based Off-Board Battery Charger

A Developed PLL Control Technique for Distorted and Unbalanc...

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2022 International electrical engineering Congress, iEECON 2022

作者： Thanakam, Thidarat Kumsuwan, Yuttana Chiang Mai University Graduate Program in Electrical Engineering Department of Electrical Engineering Faculty of Engineering Chiang Mai Thailand Chiang Mai University Faculty of Engineering Department of Electrical Engineering Chiang Mai Thailand

ISBN: (纸本)9781665402064

As electric vehicle technologies advance, the number of off-board battery charger stations grows. Because they can provide a high-power level that is suitable for fast charging. The main factor of high-power transferring is power converters that should serve the grid power quality, including the reactive power, the power factor, and the harmonic distortion. In this paper, the development of the control algorithm for the three-phase three-level neutral point clamped converter-based off-board battery charger to support the utility grid when the three-phase grid voltage distortion or unbalance occurs is presented. By applying the standard phase-locked loop controller into the conventional control algorithm, it is possible to obtain more sinusoidal and balanced grid currents along with distorted or unbalanced grid voltages to conserve the grid power quality. The system operations, along with the comparison of the conventional control algorithm and the proposed algorithm, are provided in the simulation results. © 2022 IEEE.

关键词： Charging (batteries)

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Into 3D-Reconstructed Apparel over Virtual Try-On with Virtual Reality

Into 3D-Reconstructed Apparel over Virtual Try-On with Virtu...

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2023 International Conference on Consumer electronics - Taiwan, ICCE-Taiwan 2023

作者： Doungtap, Surasachai Petchhan, Jirayu Phanichraksaphong, Varinya Wang, Jenq-Haur International Graduate Program of Electrical Engineering and Computer Science Taiwan National Taiwan University of Science & Technology Dept. of Electrical Engineering Taiwan National Taipei University of Technology Department of Computer Science and Information Engineering Taiwan

ISBN: (纸本)9798350324174

Virtualization technologies are still growing bigger and faster. Despite the greatness of its advancement, the costume industry is still very accessible when it comes to real trials. Off-the-shelf stuff are inadequate details for the desired individual to assess its in-depth utility for each garment trying on for a second, including custom stuff are much harder to try out right away. To this end, 2D image-based 3D reconstruction inclusive of touchable-virtualized space is accessible easier to stuff details for mans' decision making in purchasing. We establish the overall end-to-end pipeline from reconstruction until visualization for one instance to be triable on its stuff for a moment. As an expectation, our proposed approach can bring objects into the experimental area and use them immediately without any obstacle. © 2023 IEEE.

关键词： Virtual reality

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A High-Performance Grid-Tied Three-Level T-Type Converter for Off-Board Battery Chargers under AC-Side Voltage Distortions and Unbalances 19

A High-Performance Grid-Tied Three-Level T-Type Converter fo...

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19th International Conference on electrical engineering/electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2022

ISBN: (纸本)9781665485845

The conversions are a key factor in the battery charging of electric vehicles. The off-board battery chargers, which are composed of converters and controller units, are needed to fast charge by transferring high-power. The converters should serve applications even with unusual grid systems where non-sinusoidal grid currents occur. This paper describes a high-performance, three-level T-type converter for off-board battery chargers. It can operate under conditions of grid voltage distortions and grid voltage unbalances. The proposed control algorithm provides the three-phase sinusoidal currents to prevent their effect on the grid system and the equipment, which is an improvement from the conventional control algorithm. The constant current and constant voltage modes are applied for charging applications. Moreover, the power factor correction can be obtained. The simulation results are provided to investigate the performance of the off-board battery charger based on the three-level T-type converter. © 2022 IEEE.

关键词： Charging (batteries)

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