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Soft,full Wheatstone bridge 3D pressure sensors for cardiovascular monitoring

npj Flexible Electronics 2024年第1期8卷 910-917页

作者： Yoonseok Park Haiwen Luan Kyeongha Kwon Ted S.Chung Seyong Oh Jae-Young Yoo Gooyoon Chung Junha Kim Suhyeon Kim Sung Soo Kwak Junhwan Choi Hoang-Phuong Phan Seonggwang Yoo Hyoyoung Jeong Jaeho Shin Sang Min Won Hong-Joon Yoon Yei Hwan Jung John A.Rogers Department of Advanced Materials Engineering for Information and Electronics Integrated Education Institute for Frontier Science&Technology(BK21 Four)Kyung Hee UniversityYongin-siGyeonggi-do 17104Republic of Korea Department of Mechanical and Aerospace Engineering University of California San DiegoLa JollaCA 92093USA School of Electrical Engineering Korea Advanced Institute of Science and TechnologyDaejeonRepublic of Korea Department of Mechanical Engineering Columbia UniversityNew YorkNYUSA Division of Electrical Engineering Hanyang University ERICAAnsan 15588Republic of Korea Department of Semiconductor Convergence Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Biomedical Research Division Korea Institute of Science and TechnologySeoul 02792Republic of Korea Department of Chemical Engineering Dankook UniversityYonginGyeonggi-do 16890Republic of Korea School of Mechanical and Manufacturing Engineering Tyree Institute of Health EngineeringUniversity of New South WalesSydneyNSW 2052Australia Querrey Simpson Institute for Bioelectronics Northwestern University EvanstonEvanstonIL 60208USA Department of Electrical and Computer Engineering University of California DavisDavisCA 95616USA Department of Electrical and Computer Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon-siGyeonggi-do 16419Republic of Korea Department of Electronic Engineering Gachon UniversitySeongnamsiGyeonggi-do 13120Republic of Korea Department of Electronic Engineering Hanyang UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Biomedical EngineeringNeurological SurgeryChemistryMechanical EngineeringElectrical Engineering and Computer Science Simpson Querrey Institute and Feinberg Medical SchoolCenter for Bio-Integrated ElectronicsNorthwestern University EvanstonEvanstonIL 60208USA

Variations in parameters associated with the ambient environment can introduce noise in soft,body-worn *** example,many piezoresistive pressure sensors exhibit a high degree of sensitivity to fluctuations in temperature,thereby requiring active compensation *** research presented here addresses this challenge with a multilayered 3D microsystem design that integrates four piezoresistive sensors in a full-Wheatstone bridge *** optimized layout of the sensors relative to the neutral mechanical plane leads to both an insensitivity to temperature and an increased sensitivity to pressure,relative to previously reported devices that rely on similar operating *** this 3D pressure sensor into a soft,flexible electronics platform yields a system capable of real-time,wireless measurements from the surface of the *** above the radial and carotid arteries yields high-quality waveforms associated with pulsatile blood flow,with quantitative correlations to blood *** results establish the materials and engineering aspects of a technology with broad potential in remote health monitoring.

关键词： Wheat bridge thereby

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Polarization-induced photocurrent switching effect in heterojunction photodiodes

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Nano Research 2023年第4期16卷 5503-5510页

作者： Dingbo Chen Yu-Chang Chen Guang Zeng Yu-Chun Li Xiao-Xi Li Dong Li Chao Shen Nan Chi Boon S.Ooi David Wei Zhang Hong-Liang Lu State Key Laboratory of ASIC and System Shanghai Institute of Intelligent Electronics&SystemsSchool of MicroelectronicsFudan UniversityShanghai 200433China Key Laboratory for Information Science of Electromagnetic Waves Department of Communication Science and EngineeringFudan UniversityShanghai 200433China Photonics Laboratory Division of ComputerElectricaland Mathematical Sciences and EngineeringKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Kingdom of Saudi Arabia

The unipolar photocurrent in conventional photodiodes(PDs)based on photovoltaic effect limits the output modes and potential versatility of these devices in *** photodiodes with photocurrent switching are emerging as a promising solution for obtaining photoelectric devices with unique and attractive functions,such as optical logic ***,we design an all-solid-state chip-scale ultraviolet(UV)PD based on a hybrid GaN heterojunction with engineered bipolar polarized electric *** introducing the polarization-induced photocurrent switching effect,the photocurrent direction can be switched in response to the wavelength of incident light at 0 V *** particular,the photocurrent direction exhibits negative when the irradiation wavelength is less than 315 nm,but positive when the wavelength is longer than 315 *** device shows a responsivity of up to−6.7 mA/W at 300 nm and 5.3 mA/W at 340 nm,*** particular,three special logic gates in response to different dual UV light inputs are demonstrated via a single bipolar PD,which may be beneficial for future multifunctional UV photonic integrated devices and systems.

关键词： GaN heterostructure ultraviolet(UV)photodiodes bipolar photocurrent optical logic device

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An Array of Silicon Dual Microneedle Electrodes Integrated With mini-LEDs for Electrophysiological Recording And Simultaneous Application of electrical and Optical Stimuli to the Retina for Artificial Vision 38

An Array of Silicon Dual Microneedle Electrodes Integrated W...

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38th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2025

作者： Chung, Seung-Han Kim, Chaesung Kim, Yong-Kweon Lee, Seung-Ki Park, Jae-Hyoung Im, Maesoon Seoul National University Department of Electrical and Computer Engineering Seoul Korea Republic of College of Engineering Korea University School of Electrical Engineering Seoul Korea Republic of Dankook University Department of Electronics and Electrical Engineering Yongin Korea Republic of Seoul Korea Republic of Division of Bio-Medical Science and Technology Seoul Korea Republic of Kyung Hee University KHU-KIST Department of Converging Science and Technology Seoul Korea Republic of

ISBN: (纸本)9798331508890

We report a novel hybrid neural interface device that not only enables simultaneous application of electrical and optical stimuli but also offers electrophysiological recording capability. A 6×6 silicon dual microneedle electrode array was fabricated and each pair consisted of recording and stimulating electrodes. A mini-LED matrix was also integrated underneath the electrode array to deliver optical stimulation. Spiking activities of retinal ganglion cells of an ex-vivo retina were successfully recorded in response to electrical and optical stimuli applied from the fabricated device. © 2025 IEEE.

关键词： Light emitting diodes

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Joint Positioning and Computation Offloading in Multi-UAV MEC for Low Latency Applications: a Proximal Policy Optimization Approach

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IEEE Transactions on Mobile Computing 2025年

作者： Wang, Yuhui Farooq, Junaid Ghazzai, Hakim Setti, Gianluca University of Michigan-Dearborn Department of Electrical & Computer Engineering College of Engineering and Computer Science DearbornMI48128 United States Division Saudi Arabia

Multi-access edge computing (MEC) has emerged as a proven solution for reducing communication latency and enhancing user experience in delay-sensitive applications by offloading computation-intensive tasks to edge servers. In future networks, unmanned aerial vehicles (UAVs), with their flexible deployment and reliable communication capabilities, have the potential to be deployed as aerial MEC servers in areas lacking cellular infrastructure. However, the joint optimization of UAV placement and task offloading poses significant challenges due to the interdependence between communication latency, computational demands, and the resource limitations of UAVs. In this paper, we propose a novel joint optimization framework utilizing proximal policy optimization (PPO) to simultaneously address UAV placement and computation offloading in UAVenabled MEC networks. The framework dynamically adapts to changing network conditions, minimizing end-to-end latency while balancing computational loads and energy consumption. Extensive simulations demonstrate that the proposed PPO-based approach achieves superior performance compared to conventional optimization methods, with significant improvements in system latency, resource utilization, and network resilience. This work contributes scalable, adaptive solutions for UAV-assisted MEC networks in dynamic environments, enabling robust support for mission-critical and latency-sensitive applications. © 2002-2012 IEEE.

关键词： Computation offloading

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DECENTRALIZED VOLTAGE CONTROL IN ACTIVE DISTRIBUTION SYSTEMS COMBINING ON-LOAD TAP CHANGERS AND DEMAND RESPONSE 13

DECENTRALIZED VOLTAGE CONTROL IN ACTIVE DISTRIBUTION SYSTEMS...

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13th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion, MEDPOWER 2022

作者： Nikolaidis, Vassilis C. Maropoulos, Michael Konstantinou, Charalambos Department of Electrical and Computer Engineering Democritus University of Thrace Xanthi Greece Computer Electrical and Mathematical Science and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia

ISBN: (纸本)9781839538445

This paper presents a voltage control method for active distribution systems, which is based on the operation of on-load tap changers of the distribution transformers, in conjunction with a demand response program. Both on-load tap changers and demand response operations are initiated when pre-determined voltage criteria are fulfilled, making the approach completely decentralized. Several scenarios considering time-varying consumption of loads and variable electricity production from distributed generation units are simulated. The proposed voltage control method is tested against those scenarios, whereas also severe contingencies, such as the sudden loss of a distributed generation unit, are additionally considered. The simulation results show that the proposed method efficiently controls voltage within the permissible distribution levels, even under extreme system conditions. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Voltage control

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Synthesis of novel mesoporous polyvinylamine functionalized with 2-Mercapto-N-methylbenzamide for mercury ions removal from industrial wastewater effluent

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Journal of Industrial and engineering Chemistry 2025年 149卷 836-848页

作者： Zouli, Nasser Maslamani, Nujud Hassan, Mohamed Cheira, Mohamed F. Hassanein, Taha F. Chemical Engineering Department College of Engineering and Computer Sciences Jazan University Jazan45142 Saudi Arabia Department of Physical Sciences Chemistry Division College of Science Jazan University P.O. Box. 114 Jazan45142 Saudi Arabia Nuclear Materials Authority P.O. Box 530 Maadi Cairo Egypt Chemistry Department Faculty of Science Helwan University Cairo Helwan11795 Egypt

This research introduces a groundbreaking, high-efficiency adsorbent for the remediation of mercury ion contamination in industrial wastewater effluents. A novel chelating polymer, 2-Mercapto-N-methylbenzamide-functionalized polyvinyl amine (PVAm-MMB), was synthesized via a facile acid-catalyzed condensation reaction, strategically incorporating amine, imine, and thiol functionalities to facilitate robust mercury sequestration. Rigorous structural characterization was undertaken utilizing a comprehensive suite of analytical techniques, including elemental CHNS analysis, FTIR spectroscopy, NMR spectroscopy, SEM-EDX microscopy, BET surface area analysis, GC–MS spectrometry, TGA analysis, and XPS spectroscopy, definitively confirming the desired structural attributes of the synthesized material. Subsequent adsorption studies demonstrated the exceptional performance of the mesoporous PVAm-MMB, exhibiting a significant specific surface area (SBET) of approximately 73.7 m2/g, a total pore volume (Vm) of approximately 0.31 cm3/g, and an average pore width of approximately 21.4 nm. Remarkably, the PVAm-MMB achieved a maximum adsorption capacity of approximately 62.9 mg/g under optimized conditions (pH 4.5, 25 °C, 20 min contact time, 1 g/L adsorbent concentration, and 200 mg/L Hg2+ initial concentration). Langmuir isotherm modeling provided a superior fit to the experimental adsorption data compared to the Freundlich model, indicating a monolayer adsorption mechanism. Furthermore, pseudo-first-order kinetics accurately described the adsorption process;the calculated value for qe,1 was 49.88 mg/g, which is quite aligned with the actual value of 48.6 mg/g. Thermodynamic analyses revealed the adsorption process to be spontaneous, exothermic (ΔH = −88.07 kJ/mol), and thermodynamically favored at lower temperatures. A plausible adsorption mechanism is proposed, and importantly, the adsorbent demonstrated excellent reusability. The efficacy of the PVAm-MMB was validated through t

关键词： Condensation reactions

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Chaotic-Cavity Surface-Emitting Lasers for Optical Wireless Communication

Chaotic-Cavity Surface-Emitting Lasers for Optical Wireless ...

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2023 Optical Fiber Communications Conference and Exhibition, OFC 2023

作者： Alkhazragi, Omar Dong, Ming Chen, Liang Liang, Dong Ng, Tien Khee Zhang, Junping Bagci, Hakan Ooi, Boon S. Division of Computer Electrical and Mathematical Science and Engineering Thuwal23955-6900 Saudi Arabia Huawei Technologies Co. Ltd Shenzhen518129 China

We demonstrated using chaotic cavities to lower the spatial coherence of vertical-cavity surface-emitting lasers. Our design achieved a 10-Gb/s data rate with a 60% increase in the optical power and double the number ... 详细信息

ISBN: (纸本)9781957171180

关键词： Surface emitting lasers

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Improving Quantum Circuit Synthesis with Machine Learning 4

Improving Quantum Circuit Synthesis with Machine Learning

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4th IEEE International Conference on Quantum Computing and engineering, QCE 2023

作者： Weiden, Mathias Younis, Ed Kalloor, Justin Kubiatowicz, John Iancu, Costin University of California Department of Electrical Engineering and Computer Science Berkeley United States Computational Research Division Lawrence Berkeley National Laboratory United States

ISBN: (纸本)9798350343236

In the Noisy Intermediate Scale Quantum (NISQ) era, finding implementations of quantum algorithms that mini-mize the number of expensive and error prone multi-qubit gates is vital to ensure computations produce meaningful outputs. Unitary synthesis, the process of finding a quantum circuit that implements some target unitary matrix, is able to solve this problem optimally in many cases. However, current bottom-up unitary synthesis algorithms are limited by their exponentially growing run times. We show how applying machine learning to unitary datasets permits drastic speedups for synthesis algorithms. This paper presents QSeed, a seeded synthesis algorithm that employs a learned model to quickly propose resource efficient circuit implementations of unitaries. QSeed maintains low gate counts and offers a speedup of 3.7 x in synthesis time over the state of the art for a 64 qubit modular exponentiation circuit, a core component in Shor's factoring algorithm. QSeed's performance improvements also generalize to families of circuits not seen during the training process. © 2023 IEEE.

关键词： Machine learning

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Explainable Multiple Receptive Attention Network for Expert Cardiologist Compatible Incomplete Kawasaki Disease Diagnosis on Echocardiography 1

Explainable Multiple Receptive Attention Network for Expert ...

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1st IEEE International Conference on Artificial Intelligence for Medicine, Health and Care, AIMHC 2024

作者： Lee, Kyungsu Lee, Haeyun Lee, Moon Hwan Yang, Jaeseung Kim, Sewoong Eun, Youngsoon Eun, Lucy Youngmin Hwang, Jae Youn Department of Electrical Engineering and Computer Science Daegu Gyeongbuk Institute of Science and Technology Daegu Korea Republic of Production Engineering Research Team Samsung SDI Yongin Korea Republic of Division of Pediatric Cardiology Yonsei University College of Medicine Seoul Korea Republic of

ISBN: (纸本)9798350371987

Identifying incomplete Kawasaki disease (KD) has been challenging due to its atypical clinical manifestations. Differentiating it from other febrile illnesses, including COVID-19, is crucial for pediatric patients. Early detection of coronary artery abnormalities through echocardiographic examination is vital for accurate diagnosis and favorable outcomes. With the increased prevalence of KD among pediatric populations, there is a need for continued research and innovative diagnostic tools to improve early detection and management. To address this, we introduce a Multiple Receptive Attention Network (MRANet) incorporating a multi-receptive attention layer, designed to enhance the discrimination of incomplete KD from echocardiographic images, achieving better sensitivity and specificity. A total of 147 echocardiographic imaging datasets were utilized for training MRANet and other state-of-the-art deep learning models. The performance of MRANet was compared with compatible deep learning networks for evaluation. The results demonstrate that MRANet outperforms other advanced deep learning methodologies. MRANet’s performance is comparable to that of an experienced pediatric cardiologist in detecting coronary artery abnormalities for accurate KD diagnosis. This study highlights the potential of MRANet as a valuable tool for aiding early detection and management of complex conditions in medical imaging and computer vision. Further research and validation are warranted to establish MRANet as a reliable tool in pediatric cardiology practice. ©2024 IEEE.

关键词： Echocardiography

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Signal Quality Analysis of Microwave Photonic Filtering for 6G Communications 15

Signal Quality Analysis of Microwave Photonic Filtering for ...

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15th International Conference on Information and Communication Technology Convergence, ICTC 2024

作者： Kim, Jaeseong Song, Minje Jung, Youngjin Choi, Hyunjong Song, Minhyup Electronics and Telecommunications Research Institute Photonic/Wireless Devices Research Division Daejeon Korea Republic of School of electrical engineering Korea university Seoul Korea Republic of Korea university Department of Computer Science and Engineering Seoul Korea Republic of

ISBN: (纸本)9798350364637

We have demonstrated that a 1.5 Gbps signal can be transmitted through a microwave photonic filter (MWPF) in the 24 GHz band, which belongs to the FR3 (Frequency Range 3) upper mid band (7-24 GHz), a range gaining attention for 6G communication. The MWPF was implemented with a free spectral range (FSR) of 12.3 GHz, a center frequency of 24.67 GHz, and a 3dB bandwidth of 2.24 GHz. In the signal quality test, The PRBS (Pseudo-Random Binary Sequence) signals with data rates of 500 Mbps, 1 Gbps, and 1.5 Gbps that passed through the MWPF were received by the BERT (Bit Error Ratio Tester), and the eye diagrams were successfully checked for each. This results successfully demonstrated the potential application of MWPFs in future 6G communications. Taking advantage of the programmable nature of MWPF, we plan to conduct additional signal quality tests in other 6G frequency bands. In future work, by utilizing the coherence properties of the optical frequency comb (OFC), we aim to achieve significant data rates, further proving that MWPFs are suitable devices for 6G communication. © 2024 IEEE.

关键词： Microwave photonics

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