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Novel Optical Materials and Applications, NOMA 2022

作者： Onal, Asim Eren, Guncem Ozgun Sadeghi, Sadra Melikov, Rustamzhon Han, Mertcan Karatum, Onuralp Ozer, Melek Sermin Jalali, Houman Bahmani Dogru-Yuksel, Itir Bakis Yilgor, Iskender Metin, Önder Nizamoglu, Sedat Graduate School of Material Science and Engineering Koç University Istanbul34450 Turkey Graduate School of Biomedical Science and Engineering Koç University Istanbul34450 Turkey Department of Electrical and Electronics Engineering Koç University Istanbul34450 Turkey Istituto Italiano di Tecnologia Plasmon Nanotechnologies Genova16163 Italy Department of Chemistry Koç University Istanbul34450 Turkey Istituto Italiano di Tecnologia Photonic Nanomaterials Genova16163 Italy Koç University Istanbul34450 Turkey Koç University Istanbul34450 Turkey Koc University Boron and Advanced Materials Application and Research Center Koç University Istanbul34450 Turkey

We developed quantum dot (QD) based color-conversion white LEDs that reach over 150 lumens per electrical Watt. For that we synthesized alloyed ZnCdSe/ZnSe QDs with 94% of quantum efficiency and injected QD-liquids on... 详细信息

ISBN: (纸本)9781557528209

关键词： Semiconductor quantum dots

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Reduction of interface defects in gate-recessed GaN HEMTs by neutral beam etching

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Materials Today Advances 2024年 23卷

作者： Yu, Chia Hao Chiang, Wei Hsiang Chen, Yi-Ho Samukawa, Seiji Wuu, Dong Sing Chung, Chin-Han Hsiao, Ching-Lien Horng, Ray Hua Institute of Electronics National Yang Ming Chiao Tung University Department of Materials Science and Engineering National Chung Hsing University Graduate Degree Program of College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Institute of Comunications Engineering National Yang Ming Chiao Tung University Department of Applied Materials and Optoelectronic Engineering National Chi Nan University International College of Semiconductor Technology National Yang Ming Chiao Tung University Thin Film Physics Division Department of Physics Chemistry and Biology (IFM) Linköping University

This study investigates and compares the impact of different etching techniques on the fabrication of GaN high electron mobility transistors (HEMTs) between the inductively coupled plasma reactive ion etching (ICP-RIE) and the neutral beam etching (NBE) for the gate recess. By conducting direct current analysis, it was found that devices manufactured using the NBE exhibited superior electrical performance as compared with those produced using the ICP-RIE. These enhanced electrical characteristics include a transconductance of up to 100.4 mS/mm, a threshold voltage (V_th) of −2.3 V, an on/off current ratio of 1.1 × 10⁹, a subthreshold swing (S.S.) of 99.63 mV/dec, and a remarkably low gate leakage current. Additionally, we noted varying degrees of hysteresis in the I–V characteristics were related to process disparities possibly leading to interface defects. Multi-frequency capacitance-voltage (C–V) measurements were used to identify the interface defects at the oxide/AlGaN interface of the gate. The results revealed that devices fabricated using the NBE exhibited a lower interface defect density as compared with those fabricated using the ICP-RIE, thereby elucidating the reduced hysteresis observed in the I–V characteristics. These findings indicated the significant advantages of the NBE process in the fabrication of GaN HEMTs. © 2024 The Authors

关键词： GaN HEMTs Gate recess Interface defects Multi-frequency C–V Neutral beam etching

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Deep Unsupervised Learning for Biomedical Image Translation from Harmonic Generation Microscopy Image to H&E-stained Image

Deep Unsupervised Learning for Biomedical Image Translation ...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Chen, Wei-Ju Liao, En-Yu Tai, Tsung-Ming Liao, Yi-Hua Sun, Chi-Kuang Lee, Cheng-Kuang See, Simon Chen, Hung-Wen International Intercollegiate Ph.D. Program National Tsing Hua University Hsinchu Taiwan Department of Electrical Engineering Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei Taiwan NVIDIA AI Technology Center NVIDIA Taipei Taiwan Department of Dermatology National Taiwan University Hospital College of Medicine National Taiwan University Taipei Taiwan Institute of Photonics Technologies National Tsing Hua University Hsinchu Taiwan

This work proposes an unsupervised deep learning-based image translation from Harmonic generation microscopy (HGM) to widely used H&E-stained images. The proposed methodology is promising and hopefully will facili... 详细信息

ISBN: (纸本)9781957171258

关键词： Deep learning

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Correlation between directions of postural sway induced by gaze change and auditory stimulation ─ Is different sensory information processed by a common mechanism?

Transactions of Japanese Society for Medical and Biological ...

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Transactions of Japanese Society for Medical and Biological engineering 2019年第1期57卷 21-26页

作者： Hata, Kazunari Fukuoka, Yutaka Department of Electrical Engineering and Electronics Graduate School of Engineering Kogakuin University Japan Department of Electrical and Electronic Engineering Faculty of Engineering Kogakuin University Japan

The direction of postural sway in response to neck dorsal muscle stimulation can be influenced by change in gaze direction. Likewise, this postural sway is affected by change in direction of auditory stimulation. The degree of influence differs from one subject to another, and the reason for this individual difference remains largely unknown. This study analyzed whether the direction of postural sway induced by gaze change and that induced by auditory stimulation are related to each other, with the aim to obtain insight into the brain region involved in these phenomena. Twenty-three subjects participated in the followingtwo sets of measurements. First, we measured the directions of postural sway when the subjects changed their gaze after they turned their head to either the left or right. Next, we measured the directions of postural sway during auditory stimulation from the left or right. Then we calculated the correlation coefficient between the directions of sway measured in these experiments. The correlation coefficients were significant on the right side. These results imply that a common mechanism, in which the two types of sensory information are integrated, is involved in these phenomena. © 2019, Japan Soc. of Med. electronics and Biol. engineering. All rights reserved.

关键词： Muscle

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An Efficient Provably Secure Identity-Based Authentication Technique for TMIS Under a Smart City Environment

An Efficient Provably Secure Identity-Based Authentication T...

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Communications, Computing, Cybersecurity, and Informatics (CCCI), International Conference on

作者： Chandrashekhar Meshram Mohammad S. Obaidat Balqies Sadoun Agbotiname Lucky Imoize Department of Post Graduation Studies and Research in Mathematics Jayawanti Haksar Government Post Graduate College Betul M.P. India SCS King Abdullah II School of Information Technology University of Jordan Amman Jordan University of Science and Technology Beijing Beijing China SRM University SRM Nagar Kattankulathur TN India Amity University Noida UP India College of Engineering Al-Balqa Applied University AI-Salt Jordan Department of Electrical and Electronics Engineering Faculty of Engineering University of Lagos Akoka Lagos Nigeria Department of Electrical Engineering and Information Technology Institute of Digital Communication Ruhr University Bochum Germany

ISBN: (数字)9798350349832

ISBN: (纸本)9798350349849

The advent of the Internet of Things (loT) heralds a trans formative era for electronic healthcare systems in smart environments, enabling remote healthcare delivery for individuals with special medical needs through smart home technologies. These smart homes are fitted with specialized electronic devices that automate healthcare delivery, enhancing patient safety and enabling real-time health monitoring. Central to this system is a local intelligence unit that processes sensed data, identifies critical conditions, and facilitates communication between patients and healthcare providers. The integration of telemedicine and telecare into smart homes has led to the development of Telecare Medicine Information Systems (TMIS), further advancing remote healthcare services. However, TMIS faces significant security challenges, particularly in protecting sensitive user data transmitted over public networks. To overcome these vulnerabilities, identity-based authentication techniques based on extended chaotic maps have been proposed, though they often fall short of advanced security threats. This study introduces an innovative identity-based authentication scheme, leveraging an extended Chebyshev chaotic map within a smart city context, tailored for use in multi-server environments without trusted server relationships. The proposed scheme eliminates the need for a registration center and requires users to maintain only a single password for accessing multiple TMIS servers, offering enhanced security features and reduced computational overhead. The security and efficiency of the proposed scheme are substantiated through formal proof in the random oracle model, marking a significant advancement in secure remote healthcare delivery.

关键词： Chaotic communication Smart cities Computational modeling Telemedicine Authentication Passwords Smart homes Chebyshev approximation Security Servers

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Multilevel Single-Phase Four-Leg AC-DC-AC Converter 12

Multilevel Single-Phase Four-Leg AC-DC-AC Converter

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12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020

作者： Rodrigues, Phelipe L. S. Jacobina, Cursino B. Lima, Antonio M. N. Post-Graduate Program in Electrical Engineering - PPgEE - Copele Paraíba58429-900 Brazil Department of Electrical Engineering Campina Grande Paraíba58429-900 Brazil

ISBN: (纸本)9781728158266

This paper presents a single-phase four-leg ac-dc-ac converter, with one leg shared by the grid side and the load side. The proposed topology can generate input and output voltages with seven levels, presenting reduced harmonic distortion, in addition to using reduced voltage switches. The space-vector pulsewidth modulation strategy (SV-PWM), the control technique, the system model, and a comparison with a three-leg topology will be presented. As for performance comparison parameters, harmonic distortion in currents and voltages, the average switching frequency, and semiconductor losses will be used. The topology was simulated and assembled in the laboratory to obtain experimental results. © 2020 IEEE.

关键词： Topology

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NTIRE 2023 Challenge on Image Super-Resolution (×4): Methods and Results

NTIRE 2023 Challenge on Image Super-Resolution (×4): Method...

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2023 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops, CVPRW 2023

作者： Zhang, Yulun Zhang, Kai Chen, Zheng Li, Yawei Timofte, Radu Zhang, Junpei Zhang, Kexin Peng, Rui Ma, Yanbiao Jiao, Licheng Huang, Huaibo Zhou, Xiaoqiang Ai, Yuang He, Ran Qiu, Yajun Zhu, Qiang Li, Pengfei Li, Qianhui Zhu, Shuyuan Zhang, Dafeng Li, Jia Wang, Fan Li, Chunmiao Kim, TaeHyung Kil, Jungkeong Kim, Eon Yu, Yeonseung Lee, Beomyeol Lee, Subin Lim, Seokjae Chae, Somi Choi, Heungjun Huang, ZhiKai Chen, YiChung Chiang, YuanChun Yang, HaoHsiang Chen, WeiTing Chang, HuaEn Chen, I-Hsiang Hsieh, ChiaHsuan Kuo, SyYen Choi, Ui-Jin Conde, Marcos V. Khowaja, Sunder Ali Yoon, Jiseok Lee, Ik Hyun Gendy, Garas Sabor, Nabil Hou, Jingchao He, Guanghui Zhang, Zhao Li, Baiang Zheng, Huan Zhao, Suiyi Gao, Yangcheng Wei, Yanyan Ren, Jiahuan Wei, Jiayu Li, Yanfeng Sun, Jia Cheng, Zhanyi Li, Zhiyuan Yao, Xu Wang, Xinyi Li, Danxu Cui, Xuan Cao, Jun Li, Cheng Zheng, Jianbin Sarvaiya, Anjali Prajapati, Kalpesh Patra, Ratnadeep Barik, Pragnesh Rathod, Chaitanya Upla, Kishor Raja, Kiran Ramachandra, Raghavendra Busch, Christoph Computer Vision Lab Eth Zurich Switzerland Shanghai Jiao Tong University China University of Würzburg Germany Xidian University China Mais&cripac Institute of Automation Chinese Academy of Sciences China School of Artificial Intelligence University of Chinese Academy of Sciences China University of Science and Technology of China China Beijing Institute of Technology China School of Information Science and Technology ShanghaiTech University China School of Information and Communication Engineering University of Electronic Science and Technology of China China China Lotte Data Communication Company Seoul Korea Republic of Graduate Institute of Electronics Engineering National Taiwan University Taiwan Department of Electrical Engineering National Taiwan University Taiwan Graduate Institute of Communication Engineering National Taiwan University Taiwan ServiceNow United States MegaStudyEdu Korea Republic of Computer Vision Lab Caidas University of Würzburg Germany University of Sindh Pakistan Iklab Inc. Tech University of Korea Siheung-Si Korea Republic of Micro-Nano Electronics Department Shanghai Jiao Tong University China Electrical Engineering Department Faculty of Engineering Assiut University Egypt Hefei University of Technology China Beijing Jiaotong University China South China University of Technology Guangdong Guangzhou China Sardar Vallabhbhai National Institute of Technology India Norwegian University of Science and Technology Norway

ISBN: (纸本)9798350302493

This paper reviews the NTIRE 2023 challenge on image super-resolution (×4), focusing on the proposed solutions and results. The task of image super-resolution (SR) is to generate a high-resolution (HR) output from a corresponding low-resolution (LR) input by leveraging prior information from paired LR-HR images. The aim of the challenge is to obtain a network design/solution capable to produce high-quality results with the best performance (e.g., PSNR). We want to explore how high performance we can achieve regardless of computational cost (e.g., model size and FLOPs) and data. The track of the challenge was to measure the restored HR images with the ground truth HR images on DIV2K testing dataset. The ranking of the teams is determined directly by the PSNR value. The challenge has attracted 192 registered participants, where 15 teams made valid submissions. They achieve state-of-the-art performance in single image super-resolution. © 2023 IEEE.

关键词： Statistical tests

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Supression of the Flexural Vibration of the Railway Car Body Floor

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IFAC-PapersOnLine 2021年第2期54卷 153-158页

作者： Asl Soyi Leblebici Semiha Trkay Mechatronics Program Eskisehir Osmangazi University Eskisehir Turkey Electrical and Electronics Engineering Department Eskisehir Technical University Eskisehir Turkey

In this paper, the railway vehicle is modeled by a seventeenth-degrees-of freedom full vehicle model to investigate the elastic vibrations of the railway vehicles’s car body subjected to the excitations from vertical track irregularities. These irregularities are represented by the power spectral density functions which are authenticated for the stochastic real track data collected from the Konya-Polatli railway line in Turkey. The car body floor is modelled as a structure consisting of a plate and its connecting components by introducing artificial springs at the joint points. The model can express the complicated elastic vibrations with fewer degrees of freedom and at a lower computational cost than the detailed finite element model. To suppress the vertical vibration of the flexible-bodied railway vehicle secondary suspension control design based on affine parameter dependent model has been built with a single objective function and the solutions are obtained via H ∞ optimization. The numerical results show that the complicated mode shapes can successfully be expressed analytically and the simulation studies illustrate that the active system is effective in reducing both the flexible and rigid modes of the car body and improving the ride comfort.

关键词： Railway vehicle car body flexural vibration active suspension control H ∞ control riding comfort

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Substation Grounding Grid Resistance Measurement Using Auxiliary Circuits Vertically Disposed on the Ground

SSRN

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SSRN 2023年

作者： Amaral, Amanda Botelho Paulino, José Osvaldo S. Caetano, Carlos Ermídio Ferreira Guimarães, Maurissone F. Lopes, Ivan José S. de Oliveira Schroeder, Marco Aurélio Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais MG Belo Horizonte Brazil Distribution Active Management Superintendence – Minas Gerais Energy Company MG Belo Horizonte Brazil Electrical Engineering Department Federal University of São João del-Rei MG São João del-Rei Brazil

An innovative methodology is proposed for measuring the resistance of substation grounding grids located in congested areas, particularly those in urban regions. The significant innovation is the use of auxiliary current and potential circuits vertically arranged on the ground. The feasibility of using the Fall of Potential (FoP) Method is experimentally investigated using the reduced model technique and an appropriate measuring electrode setup is proposed. The possibility of measurement using the two auxiliary electrodes, positioned in relation to the grid under test, obeying a ratio of 76%, is also evaluated. The depth of these measuring auxiliary electrodes for reliable measurements was determined from a theoretical study, a series of computer simulations, an experimental study in a reduced model, as well as measurements on a 100 m² grounding grid. The results show the feasibility of using the Fall of Potential (FoP) Methodology as well as the two auxiliary electrodes whose distances to the grid obey the proportion of 76%. © 2023, The Authors. All rights reserved.

关键词： Electric grounding

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Detection of Twin Pregnancies using Fetal Phonocardiogram

Detection of Twin Pregnancies using Fetal Phonocardiogram

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Rajeshwari BS Aman Sinha Arnab Sengupta Dhaladhuli Jahnavi Nirmalya Ghosh Amit Patra Department of Electronics and Instrumentation Engineering Siddaganga Institute of Technology Tumakuru Karnataka School of Medical Science and Technology Indian Institute of Technology Kharagpur West Bengal Dr. BC Roy Post Graduate Institute of Paediatric Sciences Kolkota West Bengal Department of Electrical Engineering Indian Institute of Technology Kharagpur West Bengal

Fetal phonocardiogram (fPCG), or the electronic recording of fetal heart sounds, is a safe and easily available signal that can be used to monitor fetal wellbeing. In the proposed work an attempt is made to identify twin pregnancies using fPCG data recorded from the fetus with 1/3 rd power in octave band filtered output as features to train K-Nearest Neighbor (KNN) and support vector machine (SVM) classifiers. The SVM classifier with the quadratic kernel is able to identify singletons and twins with a positive predictive value of 100% and 79.1% respectively. The KNN classifier with k=10 neighbors is able to identify singletons and twins with a positive predictive value of 100% and 81.8% *** Relevance: Identifying twin pregnancies from singleton is an essential clinical protocol followed during late pregnancy as there may be complications like twin-twin transfusion syndrome, selective fetal growth restriction, and preterm labor in twin pregnancy [1], [2]. Ultrasound imaging is the most commonly used technique for twin pregnancy detection, though it is often not affordable or available in rural or low-income populations. Utilization of fPCG in such circumstances has immense clinical potential.

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