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2021 International Conference on Unmanned Aircraft Systems, ICUAS 2021

作者： Santos, Marcelo A. Ferramosca, Antonio Raffo, Guilherme V. Federal University of Minas Gerais Graduate Program in Electrical Engineering Belo Horizonte Brazil University of Bergamo Department of Management Information and Production Engineering Dalmine24044 Italy Federal University of Minas Gerais Department of Electronics Engineering Belo Horizonte Brazil

ISBN: (纸本)9780738131153

This work proposes a single-layer finite-horizon optimal control strategy to solve the autonomous navigation problem while accounting for energy efficiency and providing obstacle avoidance feature in cluttered environments with unknown obstacles. Considering the rate capacity effect of electric batteries, the nonlinear state-of-charge behavior is described and included in the optimal control problem to achieve energy-awareness. Besides, artificial potential fields are considered to obtain obstacle avoidance capabilities. The control problem is formulated inspired by the tracking model predictive control framework, and it considers the central idea of including artificial variables into the control problem to obtain a closed-loop system with an enlarged domain of attraction and with feasibility insurance. Finally, numerical results in a case study considering a quadrotor UAV are provided to corroborate the proposed strategy. © 2021 IEEE.

关键词： Energy efficiency

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Assessment of force control improvement induced by sinusoidal vibrotactile stimulation in dominant and non-dominant hands

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Research on Biomedical engineering 2021年第1期37卷 95-103页

作者： Germer, Carina Marconi Moreira, Luciana Sobral Elias, Leonardo Abdala Department of Electronics and Biomedical Engineering School of Electrical and Computer Engineering University of Campinas CampinasSP Brazil Neural Engineering Research Laboratory Center for Biomedical Engineering University of Campinas CampinasSP Brazil Cellular and Structural Biology Graduate Program Institute of Biology University of Campinas CampinasSP Brazil Faculty of Biological Sciences Center for Life Sciences Pontifical Catholic University of Campinas CampinasSP Brazil

Purpose: Vibrotactile stimulation has been shown to improve sensorimotor integration in the central nervous system, thereby enhancing motor performance in several conditions. Here we aim to address two questions: (1) Would lateral asymmetries yielding handedness influence the force control improvement induced by sinusoidal vibrotactile stimulation? (2) Does the force control improvement depend on finding an optimum stimulus intensity? Methods: Eleven participants performed a visually guided force-matching task, while different intensities of sinusoidal vibrations were applied to the index finger skin. Tasks consisted of abductions of the index fingers of dominant and non-dominant hands at 5% of their maximal voluntary contractions. The force coefficient of variation (CoV) in the condition without vibration was used as the reference (control) for later comparison with five vibration intensities. Also, force CoV in the control condition was compared with those obtained from the optimal vibration selected either from both hands or from a single hand (the one that started the experiment). Results: Despite the known sensory asymmetries in cortical and spinal circuits, handedness did not significantly influence the improvement of force control induced by sinusoidal vibrotactile stimulation during low-intensity contractions. Moreover, there was a significant reduction in force variability irrespective of the criteria used to select the vibration intensity. Conclusion: These findings add to the current knowledge on the effects of sinusoidal vibrotactile stimulation on force control and have potential implications for the development of wearable motor enhancer devices. © 2020, Sociedade Brasileira de Engenharia Biomedica.

关键词： Force control

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Stimulating auditory nerve with MEMS harvesters for fully implantable and self-powered cochlear implants

Stimulating auditory nerve with MEMS harvesters for fully im...

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2013 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013

作者： Beker, Levent Zorlu, Ozge Goksu, Nebil Kulah, Haluk Ankara Turkey Micro and Nanotechnology Graduate Program METU Ankara Turkey Department of Otorhinolaryngology School of Medicine Gazi University Ankara Turkey Department of Electrical and Electronics Engineering METU Ankara Turkey

ISBN: (纸本)9781467359818

This paper presents a novel method for stimulating auditory nerve inside cochlea via a MEMS piezoelectric energy harvester (PEH) implanted on eardrum or ossicles1. In this method, the harvester composed of several cantilevers with varying resonance frequencies within the hearing band is utilized. The signals generated by each cantilever of the PEH are used to stimulate the corresponding section of the auditory nerve. The proposed method mimics the natural operation of cochlea, therefore eliminates the use of microphone, sound processor, battery, and transmitter that are currently used in conventional cochlear implants (CI's). In this framework, a single-cantilever MEMS PEH prototype is designed and fabricated. The prototype generates adequate signal to stimulate the auditory nerve at a typical eardrum vibration, proving the method's feasibility for the next generation fully implantable and self-powered CI's. © 2013 IEEE.

关键词： Cochlear implants

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Improved ISFET readout circuit: Characterization and comparison 4

Improved ISFET readout circuit: Characterization and compari...

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4th International Symposium on Instrumentation Systems, Circuits and Transducers, INSCIT 2019

作者： De Castro, Luis Smith Oliveira De Moraes Cruz, Carlos Augusto Cardoso, Valtemar Fernandes Da Silva, Luciano Lourenco F. Pelegrini, Marcus Vinicius Marques, Greicy Costa Graduate Program in Electrical Engineering Department of Electronics and Computation Federal Federal University of Amazonas Manaus AM Brazil Senai Institute of Innovation in Microelectronics Manaus AM Brazil Department of Electronics and Computation Federal University of Amazonas Manaus AM Brazil

ISBN: (纸本)9781728121093

An improved readout circuit topology for Ion Sensitive Field Effect Transistor (ISFET) is presented in this work. The proposed circuit is derived from two circuits presented in the literature: CIMP (Complementary ISFET-MOSFET Pair) with gate feedback and AIS (Active ISFET Sensor) readouts. In order to assert the improvements concerning sensitivity and stability, the proposed circuit behavior is compared against three other related circuits previously presented in the literature. BSIM3v3 and ISFET macromodel SPICE simulations results show that the proposed circuits present improved in sensitivity, linearity and stability when compared with classical circuits. All circuits were simulated using transistors in O.35f.1m CMOS technology. © 2019 IEEE.

关键词： Timing circuits

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3D Stackable Vertical Ferroelectric Tunneling Junction (V-FTJ) with on/off Ratio 1500x, Applicable Cell Current, Self-Rectifying Ratio 1000x, Robust Endurance of 109Cycles, Multilevel and Demonstrated Macro Operation Toward High-Density BEOL NVMs

3D Stackable Vertical Ferroelectric Tunneling Junction (V-FT...

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2023 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2023

作者： Lee, J.-Y. Chang, F.-S. Hsiang, K.-Y. Chen, P.-H. Luo, Z.-F. Li, Z.-X. Tsai, J.-H. Liu, C.W. Lee, M.H. National Taiwan Normal University Institute and Undergraduate Program of Electro-Optical Engineering Taiwan National Taiwan University Graduate School of Advance Technology Taiwan National Yang Ming Chiao Tung University Institute of Electronics Department of Electronics Engineering Taiwan National Taiwan Normal University Department of Electrical Engineering Taiwan

ISBN: (纸本)9784863488069

A 1500x ILRS/IHRS with a high cell current of 100 nA/ cell (J = 83 A/cm2) is achieved by antiferroelectric (AFE) vertical ferroelectric tunnel junctions (V-FTJs) that demonstrates multilevel, a self-rectifying rate > 1000x, and macro operation. The stackable 3 D architecture integrating multiple layers of AFE V-FTJs with contact optimization further increases memory density. Robust endurance > 109 cycles at |4V| and stable nonvolatile data retention > 104 sec with extrapolation to 10 years are achieved. The proposed cell contact V-FTJ by AFE is a promising pathway toward BEOL NVMs by a NAND/NOR-based framework. © 2023 JSAP.

关键词： Ferroelectricity

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EFFICIENTSPEECH: AN ON-DEVICE TEXT TO SPEECH MODEL

arXiv

引用

arXiv 2023年

作者： Atienza, Rowel Electrical and Electronics Engineering Institute AI Graduate Program University of the Philippines Philippines

State of the art (SOTA) neural text to speech (TTS) models can generate natural-sounding synthetic voices. These models are characterized by large memory footprints and substantial number of operations due to the long-standing focus on speech quality with cloud inference in mind. Neural TTS models are generally not designed to perform standalone speech syntheses on resource-constrained and no Internet access edge devices. In this work, an efficient neural TTS called EfficientSpeech that synthesizes speech on an ARM CPU in real-time is proposed. EfficientSpeech uses a shallow non-autoregressive pyramid-structure transformer forming a U-Network. EfficientSpeech has 266k parameters and consumes 90 MFLOPS only or about 1% of the size and amount of computation in modern compact models such as Mixer-TTS. EfficientSpeech achieves an average mel generation real-time factor of 104.3 on an RPi4. Human evaluation shows only a slight degradation in audio quality as compared to FastSpeech2. © 2023, CC BY-NC-SA.

关键词： Speech synthesis

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Effect of Yttrium Treatment on Germanium-Oxide-Based Interfacial Layer of Ge P-Channel Metal–Oxide–Semiconductor Field-Effect Transistor Fabricated Through In Situ Plasma-Enhanced Atomic Layer Deposition

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IEEE Transactions on Electron Devices 2024年第3期71卷 1-6页

作者： Li, Hui-Hsuan Lin, Kuan-Yu Tsai, Yi-He Lin, Yu-Hsien Chien, Chao-Hsin Institute of Electronics National Yang Ming Chiao Tung University Hsinchu Taiwan Graduate Program for Nanotechnology Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Electronic Engineering National United University Miaoli Taiwan

This study investigated the effect of yttrium (Y) treatment on a germanium (Ge)-oxide-based interfacial layer (IL) through in situ plasma-enhanced atomic layer deposition (PEALD). Time-of-flight secondary-ion mass spectrometry revealed that the surface reaction and deposition could be successfully performed with a Y precursor, and X-ray photoelectron spectroscopy (XPS) revealed that Y treatment on an IL can suppress GeO

$_{\text{x}}$

volatilization. A metal–oxide–semiconductor capacitor gate-stack with a Y-GeO

$_{\text{x}}$

IL has a low leakage current density (2.1

$\times$

$^{-\text{5}}$

A/cm

$^{\text{2}}$

) and a low interface trap density (approximately 5.5

$\times$

$^{\text{11}}$

$^{-\text{1}}$

$^{-\text{2}}$

) under optimized temperatures. Moreover, the Ge P-channel metal–oxide–semiconductor field-effect transistor (P-MOSFET) containing a gate-stack with a Y-treated Ge-oxide-based IL exhibited a high I

$_{\biosc{on}}$

$_{\biosc{off}}$

ratio and low OFF-state current. Therefore, applying the proposed Y treatment on the IL of a Ge P-MOSFET can help achieve a subnanometer equivalent oxide thickness (EOT) and an

关键词： Ge-oxide-based germanium germanium oxide (GeOx) in situ interfacial layer (IL) plasma-enhanced atomic layer deposition (PEALD) Y-GeOx yttrium

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A novel peristaltic micropump using three wings with different widths for fluid circulation

A novel peristaltic micropump using three wings with differe...

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14th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2010, MicroTAS 2010

作者： Mun, Byung Phil Park, Chang Ju Yoo, Sung Keun Lee, Jong Hyun School of Information and Mechatronics GIST Gwangju Korea Republic of Graduate Program of Medical System Engineering GIST Gwangju Korea Republic of Dept. of Nanobio Materials and Electronics GIST Gwangju Korea Republic of

ISBN: (纸本)9781618390622

This paper reports a novel micropump to effectively rotate fluid in a circular channel. The proposed micropump having different wing widths, which squeezes the flexible part of the fluidic channel at a different time interval, provides a peristaltic effect with a single pneumatic pressure source. This allows simple operation and easy integration with a micro total analysis system (μ-TAS).

关键词： Flexible structures

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VR-Based Implicit Authentication Using Electromyogram and Inertial Measurement Unit 23

VR-Based Implicit Authentication Using Electromyogram and In...

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23rd International Conference on Cyberworlds, CW 2024

作者： Yu, Da-Young Lee, Hyung-Tak Kim, Youngsam Roh, Jong-Hyuk Kim, Soohyung Ku, Jeonghun Hwang, Han-Jeong Korea University Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology Dept. Electronics and Information Engineering Sejong Korea Republic of Korea University Dept. Electronics and Information Engineering Sejong Korea Republic of Daejeon Korea Republic of Keimyung University College of Medicine Department of Biomedical Engineering Daegu Korea Republic of

ISBN: (纸本)9798331527174

Biometrics based on electromyogram (EMG) and inertial measurement unit (IMU) signals has received significant attention due to its resistance to forgery and tampering, as well as its relatively higher convenience and security compared to other biometric modalities. However, most EMG and IMU signal-based authentication methods require explicit authentication using unnatural gestures, which is not userfriendly. To address this, we collected EMG and IMU data during virtual reality (VR) rhythm game play, which does not require explicit gestures, and performed implicit authentication. Using a linear discriminant analysis (LDA) classifier, we achieved classification accuracies of 91.71% for human identification and 87.91% for human authentication. The result demonstrated the feasibility of a seamless and implicit authentication in VR environments. © 2024 IEEE.

关键词： Electromyography

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Study on Dual-band Antennas with a Modified Conical Antenna and a Parasitic Helical Element

Study on Dual-band Antennas with a Modified Conical Antenna ...

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2022 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition, iWEM 2022

作者： Hirohara, Ryuji Fusazaki, Shinpei Noguchi, Keisuke Kanazawa Institute of Technology Graduate Program in Electrical Engineering and Electronics Ishikawa Nonoichi Japan DOCOMO CS Hokuriku Inc. Management Planning Section Network Management Department Ishikawa Kanazawa Japan

ISBN: (数字)9781665432382

ISBN: (纸本)9781665432382

With the start of the 5G operations, it will become more important to apply communication systems to automo-biles, which has been promoted in recent years as connected cars. Multi-band antennas are required to reduce the in-vehicle space which is occupied by communication equipment. We de-signed dual-band antennas for the sub-6 GHz 5G bands and the intelligent transport systems (ITS) especially the driving safety support system (DSSS) by loading helical elements to modified conical antennas (MCA), and conducted simulations and meas-urements. As a result, the antenna satisfied the sub-6 and ITS DSSS bands in the simulations. There were slightly differences between the calculated and measured results. © 2022 IEEE.

关键词： Intelligent systems

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