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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Nobile, Nicholas A. Lian, Chuanyu Sun, Hongyi Huang, Yi-Siou Mills, Brian Popescu, Cosmin Constantin Callahan, Dennis Hu, Juejun Ríos Ocampo, Carlos A. Youngblood, Nathan Electrical & Computer Engineering Department University of Pittsburgh PittsburghPA15213 United States Department of Materials Science & Engineering University of Maryland College ParkMD20742 United States Institute for Research in Electronics and Applied Physics University of Maryland College ParkMD20742 United States Department of Materials Science & Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Draper Scholar Program The Charles Stark Draper Laboratory Inc CambridgeMA02139 United States The Charles Stark Draper Laboratory Inc CambridgeMA02139 United States

Sb2Se3 is used to switch between broadband transparency and enhanced index contrast in two device types leveraging Bragg gratings for tunable stop- and pass-band functionalities. Experimental results highlight fabrica... 详细信息

ISBN: (纸本)9781957171395

关键词： Fabry-Perot interferometers

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Experimental Studies of Millimeter-Wave CMOS LO Circuits for High-Temperature Qubits Operations

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IEEE Microwave and Wireless Technology Letters 2025年

作者： Chen, Yi-Ting Huang, Guan-Yu Lin, Min-Jui Li, Jiun-Yun Chien, Jun-Chau National Taiwan University Graduate Institute of Electronics Engineering Taipei 10617 Taiwan University of California at Berkeley Department of Electrical Engineering and Computer Sciences Berkeley 94720 CA United States

Operating physical quantum bits (qubits) at higher temperatures—and consequently millimeter-wave frequencies—has the potential to relax cooling requirements and enable efficient scaling of qubit numbers. In parallel, Cryo-CMOS control and readout circuits must scale in frequency to allow for tight integration. This letter presents the study of Cryo-CMOS millimeter-wave local oscillators (LOs) generation circuits for this purpose. Implemented in TSMC 40-nm CMOS technology, we demonstrate successful implementation of a 30-GHz oscillator consuming 0.235 mW from a 0.5-V supply, as well as two 30-GHz divide-by-80 LO chains using latch-based and injection-locked frequency dividers (ILFDs), all operating at 4 K. Testing setups and techniques are described. © 2023 IEEE.

关键词： Cryo-CMOS frequency dividers high-temperature qubits local oscillators (LOs) chain millimeter-wave

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Dual-UNet: An End-to-End Deep Learning Framework for the Automatic Chronic Diabetic Wound Segmentation

Dual-UNet: An End-to-End Deep Learning Framework for the Aut...

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Computing and Information Technology (ICCIT-1441), 2020 International Conference on

作者： Mustafa Alhababi Gregory Auner Hafiz Malik Lubna Alazzawi Muteb Aljasem Electrical and Computer Engineering Wayne State University Detroit MI USA Department of Smart Sensors and Integrated Microsystems Program Wayne State University Detroit MI USA Electrical and Computer Engineering University of Michigan-Dearborn Dearborn MI USA Electronics and Computer Engineering & Robotics Engineering Bowling Green State University Bowling Green OH USA

ISBN: (数字)9798350353839

ISBN: (纸本)9798350353846

Foot ulcers are one of the chronic wounds commonly occurring in diabetic patients and are associated with a high risk of major or minor amputations. Evaluation and measurement of such wounds are done manually by experts to assess the wound healing and suggest further treatment. Manual assessment methods can cause infections at times and are less feasible in the existence of pandemic situations. The development of artificial intelligence has brought a revolution in many domains of medical imaging. Deep learning-based computer-aided approaches can be applied to assist clinicians in assessing and monitoring chronic wounds. Wound segmentation helps to measure wound area which is useful for assessing its healing progress. In this research work, a deep learning-based segmentation method, namely Dual-UNet is presented for precisely segmenting the diabetic foot ulcers images. The foot ulcer images are passed to Dual-UNet to generate the mask image having the segmented wound area. We proposed two modified UNets each having a customized encoder and decoder with skip connections, atrous spatial pyramid pooling (ASPP) block, and output block to improve the segmentation results. We assessed our framework by performing experimentation on two benchmark datasets, named the foot ulcer segmentation (FUSeg) challenge and the AZH segmentation dataset. Additionally, we have also assessed our Dual-UNet for cross-corpora validation to demonstrate the generalization capability of the proposed approach. The qualitative and quantitative results highlight the accuracy and effectiveness of the Dual-UN et framework for segmenting chronic diabetic wounds. Future research should focus on the development of large and diverse wound datasets and improving the results for cross-corpora evaluation.

关键词： Deep learning Image segmentation Pandemics Computational modeling Manuals Wounds Diabetes Decoding Information technology Monitoring

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The Development of a Portable and Reusable Ketamine Sensor 9th

The Development of a Portable and Reusable Ketamine Sensor

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9th International Conference on the Development of Biomedical engineering in Vietnam, BME 2022

作者： Jheng, Deng-Yun Van Hieu, Nguyen Tran, Ngoc Luan Wu, Hsing-Ju Chu, Pei-Yi Phan, Thien Luan Ching, Congo Tak Shing Department of Electrical Engineering National Chi Nan University Nantou Taiwan Department of Physics and Electronics Engineering University of Science - Ho Chi Minh National University Ho Chi Minh Viet Nam Research Assistant Center Show Chwan Memorial Hospital Changhua Taiwan Department of Medical Research Chang Bing Show Chwan Memorial Hospital Changhua Taiwan Department of Pathology Show Chwan Memorial Hospital Lukang Taiwan School of Medicine College of Medicine Fu Jen Catholic University New Taipei City Taiwan Graduate Institute of Biomedical Engineering National Chung Hsing University Taichung Taiwan

ISBN: (纸本)9783031446290

Ketamine is a drug used to cause loss of consciousness or anesthesia. In the wrong hands, it can be used to influence judgment and behavior and can put a person at risk for unwanted or dangerous sexual activity. Along with Gamma Hydroxybutyrate (GHB) and rohypnol, ketamine is one of the most common date rape drugs. This study describes the development of capacitance and admittance spectroscopy-based sensors to differentiate beverages with or without ketamine. The beverages used in this study were regular alcoholic whisky in which various concentrations of ketamine were diluted. The results show that the proposed method can accurately quantify ketamine content by measuring capacitance data at the characteristic measurement frequencies of 7.69 MHz, with a sensitivity of 0.6 nF/(ng/μL). The product of the admittance and capacitance values measured at 6.75 MHz can significantly identify the presence of ketamine. © The Author(s), under exclusive license to Springer Nature Switzerland AG. 2024.

关键词： Capacitance

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The design and evaluation of an AR-based serious game to teach programming

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Computers and Graphics (Pergamon) 2022年 103卷 1-18页

作者： Sharma, Vandit Bhagat, Kaushal Kumar Huang, Huai-Hsuan Chen, Nian-Shing Department of Electronics and Electrical Communication Engineering Indian Institute of Technology Kharagpur Kharagpur721302 India Advanced Technology Development Centre Indian Institute of Technology Kharagpur Kharagpur721302 India Institute for Research Excellence in Learning Sciences Program of Learning Sciences National Taiwan Normal University Taiwan

The ubiquity of smartphone and tablet devices, combined with the increasing availability of serious games, has enabled students to learn various abstract concepts in an appealing and convenient manner. While several researchers have explored the use of Augmented Reality (AR) in serious games, many of these games have not been critically explained or evaluated. To that end, we employed game-based learning methodologies and Game Learning Analytics (GLA) to systematize the design and evaluation of an AR-based serious game to teach programming. We evaluated our game for usability and effectiveness by conducting a user study on twenty-seven undergraduate students. The evaluation primarily consisted of a learning test conducted twice – before and after playing the game – along with a usability questionnaire that players completed after playing the game. Our results showed that players made significant progress after playing the game. The game helped players improve their basic programming skills, especially for the group having lower prior programming skills. The results highlighted various ways in which GLA can be used to benefit different stakeholders in the game. Based on players’ qualitative responses, we also identified several areas of improvement, most prominently the trade-off between ease of use and game complexity. We provide suggestions and discuss implications for future work. © 2022 Elsevier Ltd

关键词： Serious games

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Extended Mixed Filtering based on Zonotopic and Gaussian Uncertainties for Discrete-Time Nonlinear Systems

Extended Mixed Filtering based on Zonotopic and Gaussian Unc...

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European Control Conference (ECC)

作者： Alesi A. De Paula Guilherme V. Raffo Bruno O. S. Teixeira Graduate Program in Electrical Engineering - Universidade Federal de Minas Gerais (UFMG) Belo Horizonte MG Brazil Department of Electronic Engineering Universidade Federal de Minas Gerais (UFMG) Belo Horizonte MG Brazil

ISBN: (数字)9783907144107

ISBN: (纸本)9798331540920

In this paper, we propose a mixed filter for discrete- time nonlinear dynamical systems whose uncertainties are composed of both deterministic and stochastic terms. In practice, such mixed composition of uncertainties may appear when assimilating measured data and approximating models. The unknown-but-bounded terms are here represented by zonotopes, which are efficient representations of centrally symmetric convex polytopes. In turn, the stochastic terms are represented by Gaussian random vectors (GRVs) which address confidence regions with high probability. The proposed state estimator is based on linearized models, using the quasi-linear parameter- varying (LPV) approach. The effectiveness of our proposal is illustrated in two case studies.

关键词： Uncertainty Filtering Measurement uncertainty Stochastic processes Europe Vectors Mathematical models

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Exploring Bess Services for Transformer Energization on Offshore Oil and Gas Platforms

Exploring Bess Services for Transformer Energization on Offs...

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IEEE Petroleum and Chemical Industry Conference - Brasil (PCIC Brasil)

作者： Joseph K. Banda Lucas S. Araujo Danilo I. Brandao Fernando P. Marafão Elisabetta Tedeschi Department of Electric Power Engineering Norwegian University of Science and Technology (NTNU) Trondheim Norway Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais (UFMG) Belo Horizonte Brazil Department of Control and Automation Engineering Universidade Estadual Paulista (Unesp) Sorocaba Brazil Department of Industrial Engineering University of Trento Trento Italy

ISBN: (数字)9798350368154

ISBN: (纸本)9798350368161

The electrification of offshore oil and gas platforms (OOGPs), using offshore wind turbines, is now a reality, aimed at minimizing carbon emissions. In this scenario, the utilization of battery energy storage systems (BESS) improves both efficiency and power quality. As this integration comes with a high CAPEX, industries demand exploring BESS for multiple ancillary services on OOGPs. Thus, this paper proposes an alternative approach to energizing a power transformer (PT) using the BESS power conversion system (PCS) on the platform, aiming to minimize inrush currents. This avoids the necessity for additional bulky devices, converters, or dc voltage sources specifically designated for this purpose. The strategy consists of manipulating residual core flux using BESS PCS followed by a controlled switching, which reduces inrush currents during PT energization. The results show effective reduction of the inrush current from 2.31 pu to 0.16 pu for the presented case study.

关键词： Offshore installations Battery energy storage system Oils Voltage Switches Oil insulation Transformer cores

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Machine learning enabled the design of compact and efficient wavelength demultiplexing photonic devices

Machine learning enabled the design of compact and efficient...

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IEEE Photonics Conference (IPC)

作者： M. Turduev E. Bor O. Alparslan Y. S. Hanay H. Kurt S. Arakawa M. Murata Department of Electrical and Electronics Engineering Kyrgyz Turkish Manas University Bishkek Kyrgyzstan Department of Electrical and Electronics Engineering TOBB University of Economics and Technology Ankara Turkey Graduate School of Information Science and Technology Osaka University Osaka Japan Department of Computer Engineering Akdeniz University Antalya Turkey School of Electrical Engineering Korea Advanced Institute of Science and Technology Daejeon Republic of Korea

In this paper, we introduce the design approach of integrated photonic devices by employing reinforcement learning known as attractor selection (AttSel). Here, we combined 3D FDTD with AttSel algorithm, which is based on artificial neural networks, to achieve ultra-compact and highly efficient wavelength demultiplexers with low crosstalk such as. The presented devices consist of SOI materials, which are compatible with complementary MOS technology. Consequently, the reinforcement learning is successfully applied to design smaller and superior integrated photonic devices.

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Super-Mossian Dielectrics for Nanophotonics

Super-Mossian Dielectrics for Nanophotonics

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Conference on Lasers and Electro-Optics (CLEO)

作者： Xielin Wang Chloe F. Doiron Zhichao Li Jacob B. Khurgin Gururaj V. Naik Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston TX Department of Electrical and Computer Engineering Johns Hopkins University Baltimore MD Department of Electrical and Computer Engineering Rice University Houston TX

Searching for high-index dielectrics, we identify materials that break the index upper bound set by Moss’ rule. We highlight the promise of such super-Mossian materials by demonstrating nanophotonic devices made of F... 详细信息

ISBN: (纸本)9781957171258

关键词： Fourier transform infrared spectroscopy Nanophotonics Optical constants Optical materials Refractive index Whispering gallery modes

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Wideband Beamforming for Frequency Selective RRS Aided Near-Field Communications

Wideband Beamforming for Frequency Selective RRS Aided Near-...

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IEEE Conference on Wireless Communications and Networking

作者： Zicheng Lin Shuhao Zeng Hongliang Zhang School of Electronic Engineering and Computer Science Peking University Beijing China Department of Electrical and Computer Engineering Princeton University NJ USA School of Electronic and Computer Engineering Peking University Shenzhen Graduate School China School of Electronics Peking University Beijing China

ISBN: (数字)9798350368369

ISBN: (纸本)9798350368376

To satisfy the high data rate requirements, cellular systems will evolve towards the direction of higher carrier frequencies and larger antenna arrays. The conventional phased arrays are hard to fulfill such a vision due to its excessive power consumption induced by numerous phase shifters. To address this issue, Reconfigurable Refractive Surfaces (RRSs) provide a energy efficient solution without relying on phase shifters. With enlarged radiation aperture and increased working frequency, users are more likely to be located in the near field of the RRS. Moreover, the frequency selectivity of the RRS cannot be neglected given the wideband communications enabled by higher frequency bands. These two effects jointly aggravate the beam split problem where the signal strength of different frequency components cannot concentrate on the user, leading to a data rate degradation. In this paper, we study an RRS-based wideband near-field communication system with multiple users. Unlike most existing works, which only considered the beam split effect under near-field conditions, we jointly consider the influence of the frequency selectivity of RRS and near-field conditions on the beam split effect. To mitigate the beam split effect, the time-delay units are introduced in the RRS elements based on which a beamforming scheme is proposed to improve system data rate by jointly optimizing the digital beamformer, the phase shifts of RRS and the time-delay units. Simulation results demonstrate the effectiveness of our proposed scheme.

关键词： Phased arrays Power demand Array signal processing Simulation Phase shifters Transmitting antennas Energy efficiency Feeds Arrays Wideband

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