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4th IEEE International Conference on Recent Advances in Systems Science and engineering, RASSE 2024

作者： Kao, Yu-Shao Wang, Shih-Ting Li, I-Hsum Department of Mechanical and ElectroMechanical Engineering Tamkang University Taiwan Department of Mechanical Engineering National Chung Hsing University Taiwan Undergraduate Program of Intellectual Creativity Engineering National Chung Hsing University Taiwan

ISBN: (纸本)9798331528263

An autonomous walking aid is a type of Autonomous Mobile Robots (AMRs) designed to navigate and perform tasks independently. In this paper, we introduce an innovative obstacle avoidance approach for walking aids, with a particular emphasis on avoiding non-stereotypical obstacles such as water puddles. Traditional methods relying on LiDAR, depth sensors, or cameras often struggle with low-lying obstacles due to challenges in detecting reflective surfaces and interpreting complex visual data. To overcome these limitations, we developed two deep learning-based network architectures: the Single-Image Action Network (SIAN) and the Sequence-to-Action Network with Feedback Network (SAN-FN). The first architecture processes a single image to generate an action sequence for obstacle avoidance, while the second architecture takes an image sequence and feedback from wheel velocities to infer real-time action responses. In addition, we employed Gazebo to create a 3D simulation environment and gather training data for deep learning networks, significantly reducing the cost and effort associated with data collection. The first approach achieved a 100% success rate in simulated obstacle avoidance tests involving puddles, while the second approach demonstrated a 76% success rate. This study highlights the significant potential of deep learning in enhancing the obstacle avoidance capabilities of walking aids, particularly in the context of challenging obstacles like water puddles. © 2024 IEEE.

关键词： Deep learning

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Understanding Acoustic Phenomena in Stenosed Coronary Arteries through Bond Graph Modeling of Sound Generation 46

Understanding Acoustic Phenomena in Stenosed Coronary Arteri...

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46th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2024

作者： Sandoval, Loreto Rojas Ulloa, René Araya Da Silva, Ana Karoline Almeida De Almeida Nunes, Gustavo Adolfo Marcelino Faria, Rafael Mendes Sepúlveda, José Parra Da Costa, Lindemberg Barreto Mota Acevedo, Luca Rubilar Rosa, Mário Fabrício Fleury Pino, Esteban J. De Siqueira Rodrigues Fleury Rosa, Suélia Universidad de Concepción Electrical Engineering Department Chile University of Brasilia Mechanical Engineering Department Distrito Federal Brasilia70910-900 Brazil University of Brasilia Postgraduate Program in Biomedical Engineering Distrito Federal Brasilia70910-900 Brazil

ISBN: (纸本)9798350371499

Coronary artery stenosis is characterized by the obstruction or narrowing of coronary arteries, impairing blood flow to the cardiac muscle. Cardiovascular diseases rank among the leading global causes of death. Understanding the mechanisms, risk factors, and impacts of coronary artery stenosis (CAD) is essential for developing effective strategies for prevention, early diagnosis, and treatment, aiming to enhance cardiovascular health and reduce adverse consequences associated with this condition. Previous studies explore the potential of acoustic devices in non-invasive CAD detection through the analysis of cardiac sounds. A theoretical model utilized a cardiac microphone and signal processing to generate sounds in partially obstructed coronary arteries. Emphasizing the model's sensitivity to geometric and dynamic parameters, this article integrates Bond Graph (BG) models into the analog sound circuit, aiming to develop a dynamic representation of biological processes in complex systems like coronary arteries. This research seeks to construct a comprehensive mathematical model using a state-space approach to enhance understanding, diagnostics, and interventions in cardiovascular conditions. The utilization of BG demonstrated notable similarity to the pathology of the disease, providing an accurate representation of its effects. The model's sensitivity to geometric and dynamic parameters allowed an in-depth understanding of the specific physiological characteristics of the disease, highlighting its ability to reproduce patterns observed in patients with CAD. © 2024 IEEE.

关键词： Diagnosis

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Facility Layout using Computer Routing: A Review

Facility Layout using Computer Routing: A Review

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2024 International Conference on Science, engineering and Business for Driving Sustainable Development Goals, SEB4SDG 2024

作者： Udoye, Nduka Ekene Okolie, Sociis Tobias Aguzie Nnamba, Ogechi Joy Fayomi, Ojo Sunday Isaac Banjo, Solomon Covenant University Ota Department of Mechanical Engineering Lagos State Nigeria Gregory University Uturu Department of Mechanical Engineering Abia State Nigeria Bells University of Technology Department of Mechanical and Biomedical Engineering Ogun State P.M.B 1015 Ota Nigeria University of Johannesburg Johannesburg Department of Mechanical Engineering Science 2006 South Africa Covenant University Ota College of Engineering Department of Mechanical Engineering Lagos State Nigeria

ISBN: (纸本)9798350358155

Facility Layout is an essential aspect of any industry or firm because it determines how well the industry would operate when production begins and how productive its processes would be. Some of its objectives are to save cost, and time, improve productivity and enhance customer satisfaction. Facility layout design is also fundamental because it lays the foundation for how the layout would look before it is produced physically or further improved on. The review discusses how CORELAP is being implemented and its firms or industries' effects where it was implemented. From this review, it can be concluded that CORELAP is an efficient and effective technique that can be used to create new layouts and redesign existing layouts to reduce material handling distance, save time, and save costs incurred. © 2024 IEEE.

关键词： Plant layout

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Characterization of retinal ganglion cell damage at single axon bundle level in mice by visible-light optical coherence tomography fibergraphy

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Neural Regeneration Research 2023年第1期18卷 135-136页

作者： Xiaorong Liu Hao F.Zhang Department of Biology Department of PsychologyProgram in Fundamental NeuroscienceUniversity of VirginiaCharlottesvilleVAUSA Department of Biomedical Engineering Northwestern UniversityEvanstonILUSA

Retinal ganglion cells(RGCs)receive synaptic inputs through their dendritic trees in the inner plexiform layer(IPL)and convey the visual information via their axons which form the optic nerve to the brain(Sanes and Masland,2015).In glaucoma,RGCs and their axons degenerate and die,leading to irreversible vision loss and eventually blindness if left untreated(Quigley,2016).

关键词： bundle visible eventually

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Comparative Analysis of Photoplethysmogram (PPG) Waveform Characteristics Across Various Body Sites Under Normal and Apneic Conditions 46

Comparative Analysis of Photoplethysmogram (PPG) Waveform Ch...

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46th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2024

作者： Rahme, Joe Saleh, Sahera Al-Sadek, Tamara Amatoury, Jason Khraiche, Massoud American University of Beirut Biomedical Engineering Program Beirut Lebanon American University of Beirut Department of Electrical Engineering Beirut Lebanon

ISBN: (纸本)9798350371499

Detecting sleep apnea through wearable devices poses challenges due to the condition's variability across populations and the inconsistencies in measurements attributed to current wearable technologies. This study aims at comparing photoplethysmogram (PPG) waveform characteristics in healthy subjects, including the change in amplitude, width, and time to peak (Tp) of the signal. PPG signals were recorded at six different body sites (wrist upper, wrist lower, ring finger, thumb, neck, and head) under both simulated normal and apneic conditions. A key objective of this work was to identify optimal LED intensities for detecting these waveform features at each site, providing valuable insights for future development of PPG hardware by pinpointing the most effective intensities. Additionally, the research aims for a better understanding of the variation of the PPG waveform between different body sites. © 2024 IEEE.

关键词： Photoplethysmography

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Frequency-Domain Modeling-Free Iterative Learning Control for Point-To-Point Motion 32

Frequency-Domain Modeling-Free Iterative Learning Control fo...

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32nd IEEE International Symposium on Industrial Electronics, ISIE 2023

作者： Maeda, Yoshihiro Iwasaki, Makoto Nagoya Institute of Technology Electrical and Mechanical Engineering Program Department of Engineering Nagoya Japan

ISBN: (纸本)9798350399714

The data-driven autonomous feedforward (FF) control design technique known as frequency-domain modelling-free iterative learning control (MFILC) has gained attention for its ability to achieve fine motion control performance without excessive labor. However, the existing frequency-domain MFILC methods that rely on empirical transfer function estimation are not suitable for point-to-point (PTP) motion due to the leakage error that occurs in frequency response function (FRF) estimation. To address this issue, this study proposes an improved frequency-domain MFILC method that employs the differential filtering-based empirical transfer function estimation for FRF estimation. This enhancement enables the proposed method to learn the FF compensation in both reciprocating and PTP motion. Simulations were conducted to evaluate the effectiveness of the proposed method in achieving fast and precise motion control of a galvano scanner. © 2023 IEEE.

关键词： Motion control

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Movement of Cell Flowing over Oblique Microgroove 14

Movement of Cell Flowing over Oblique Microgroove

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14th International Multi-Conference on Complexity, Informatics and Cybernetics, IMCIC 2023

作者： Moriizumi, Natsuki Hashimoto, Shigehiro Uehara, Shogo Biomedical Engineering Department of Mechanical Engineering Kogakuin University Tokyo1638677 Japan Biomedical Engineering Systems Design Kogakuin University Tokyo1638677 Japan

ISBN: (纸本)9781950492718

The bumping movement of the cell flowing over the oblique microgroove has been analyzed in vitro. The micro flow-channel (0.05 mm high, 1 mm wide, 25 mm long) with grooves (4.5 μm deep) has been manufactured of polydimethylsiloxane (PDMS) by micromachining technique. The angle between the main flow direction and the longitudinal axis of the groove was 45 degrees. Variation has been made on the width (0.03 mm, 0.04 mm, and 0.05 mm) of the groove. Myoblast (C2C12: mouse myoblast cell line) was used in the test. A main flow velocity (0.5 mm/s © 2023 Proceedings IMCIC - International Multi-Conference on Complexity, Informatics and Cybernetics.

关键词： Silicones

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The Influence of Silicon Dioxide as a Fuel Additive in a Diesel Engine Fuelled by Pure Palm Oil 4

The Influence of Silicon Dioxide as a Fuel Additive in a Die...

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4th International Symposium on Advances and Innovation in mechanical engineering, ISAIME 2023

作者： Prahmana, Rico Aditia Darmanto, Prihadi Setyo Reksowardojo, Iman Kartolaksono Prakoso, Tirto Juangsa, Firman Bagja Doctoral Program of Mechanical Engineering Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung40132 Indonesia Program Study of Mechanical Engineering Faculty of Industrial Technology Institut Teknologi Sumatera South Lampung35365 Indonesia Thermal Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung Indonesia Department of Chemical Engineering Faculty of Industrial Technology Institut Teknologi Bandung Bandung40132 Indonesia Program Study of Mechanical Engineering Faculty of Industrial Technology Universitas Pertamina Jakarta12220 Indonesia

In the last decade, the Indonesian government has implemented a program to use biodiesel as a substitute for fossil diesel to reduce dependence on fossil fuels. On the other hand, the development of biodiesel as an alternative fuel to replace fossil diesel has several challenges, one of which is the production of biodiesel, which is more complicated and requires a long process. However, the direct use of crude palm oil (CPO) in diesel engines is not recommended because it has many drawbacks. Research recently shows that fuel additives in diesel engines have promising prospects. Therefore, to solve the problem, this study used pure palm oil (PPaO) as the primary fuel, with the addition of silicon oxide (SiO2) as a fuel additive in diesel engines. The results showed that using SiO2 additive in PPaO can increase thermal efficiency by 18.8% at 60% load compared to diesel fuel (DF). Nevertheless, using this fuel increased specific fuel consumption (SFC) by 3.9% on average and increased the opacity by 153% compared to diesel fuel. These results indicate that SiO2 has the potential to be developed as an effective additive to PPaO fuel that can improve the efficiency and performance of diesel engines. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Biodiesel

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Wind Noise Reduction Strategy in Hearing Aids Through U-Net Deep Learning and Microphone Enclosure Design

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IEEE Sensors Journal 2024年第11期24卷 18307-18316页

作者： Lin, Kuei-Y. Lai, Feng-M. Chang, Hung-Y. Merry Electronics Company Ltd Taichung40850 Taiwan National Chung Hsing University Department Of Mechanical Engineering Taichung402202 Taiwan Da-Yeh University Department Of Biomedical Engineering Changhua51591 Taiwan

Wind noise interference can adversely affect the performance of behind-the-ear hearing aids, particularly when used outdoors. In this study, we developed a novel strategy to mitigate this problem. Our methodology involved a modified microphone enclosure design, preprocessing stages of beamforming and wide dynamic range compression (WDRC) (which are inherent in conventional hearing aids), and advanced deep-learning-based noise reduction methods. We first explored the cavity aspect ratios and wall slanting of the microphone enclosure's design and determined that noise could be reduced by modifying the upper and lower enclosure widths from 0.8 mm (for both) to 1.1 and 0.5 mm, respectively. In terms of signal processing, a 1-D convolutional neural networks (CNNs) model achieved wind noise detection with an accuracy of 99.25% in various scenarios. The U-Net deep learning architecture was implemented for noise reduction and substantially improved short-time objective intelligibility (STOI) by 18.97%-209.09% compared with traditional high-pass filters (HPFs). Training with a voice database further improved the STOI. In terms of the mean opinion score-listening quality objective (MOS-LQO) and STOI metrics, all combinations of preprocessors with U-Net outperformed U-Net alone, and beamforming was the optimal preprocessing method. In conclusion, adaptive signal preprocessing based on wind classification, microphone enclosure optimization, and U-Net deep learning techniques effectively reduced wind noise interference, improving the outdoor usability, and listening experience provided by hearing aids. © 2001-2012 IEEE.

关键词： Beamforming

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Deformation Direction of Cells Related to Passing Velocity through Microgap 14

Deformation Direction of Cells Related to Passing Velocity t...

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14th International Multi-Conference on Complexity, Informatics and Cybernetics, IMCIC 2023

作者： Hashimoto, Shigehiro Uehara, Shogo Kurihara, Ayaka Biomedical Engineering Department of Mechanical Engineering Kogakuin University Tokyo1638677 Japan Biomedical Engineering Systems Design Kogakuin University Tokyo1638677 Japan

ISBN: (纸本)9781950492718

The deformation direction of cells related to the passing velocity through a microgap has been investigated in vitro. The microgap (7 μm high, 0.4 mm wide, and 0.1 mm long) was manufactured between the ridge and the groove in the micro flow-channel by photolithography technique. Myoblasts (C2C12: mouse myoblast cells) were used in the experiment. The flow rate of the medium fluid, in which cells were suspended, was varied by the pressure head between the inlet and outlet. The deformation of each cell passing through the micro gap was observed with an inverted phase-contrast microscope. The two-dimensional projected image was tracked using "ImageJ". The experimental results shows that cells increase the velocity with deformation. Some cells tend to make elongation to the flow direction. © 2023 Proceedings IMCIC - International Multi-Conference on Complexity, Informatics and Cybernetics.

关键词： Photolithography

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