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2024 IEEE International Conference on systems, Man, and Cybernetics, SMC 2024

作者： Esumi, Tsubasa Takemura, Noriko Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Department of Artificial Intelligence Fukuoka Japan

ISBN: (纸本)9781665410205

Long-term desk work with lousy posture causes physical disabilities. To solve this problem, we have developed a smart chair with a controllable seat angle in our previous research. In order to control the seat angle and guide the user to the correct posture using this smart chair, it is necessary to investigate how the posture changes in response to the seat angle change. In this study, we first constructed a dataset by capturing posture data from 30 subjects while changing the seat angle of the smart chair. This dataset trained a model based on a graph neural network to predict posture in response to seat angle changes. We compared the model's prediction performance in the evaluation experiment depending on the training data and the body part. © 2024 IEEE.

关键词： Graph neural networks

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Investigation of the motion control performance and hydrodynamic of a multi-winged towed vehicle with intentional instability 33rd

Investigation of the motion control performance and hydrodyn...

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33rd International Ocean and Polar engineering Conference, ISOPE 2023

作者： Fukuda, Yu Yamaguchi, Satoru Shindo, Yuta Graduate School of Engineering Kyushu University Fukuoka Japan Department of Marine Systems Engineering Kyushu University Fukuoka Japan

ISBN: (纸本)9781880653807

The authors propose a towed vehicle with intentional instability for use in seafloor exploration. This towed vehicle has one pair of canard wings in addition to conventional main and tail wings. The hydrodynamic characteristics and the motion control performance of the multi-winged towed vehicle with the three control surfaces are investigated. First, CFD and experiments were conducted to investigate the effects of interference between the wings. Then, equations of the motion for the multi-winged towed vehicle were formulated and the simulations of the motion control were conducted. The calculations were performed for the longitudinal motion of the vehicle. Since this system has three control inputs (three wing angles) for two control outputs (pitch and heave), the control input to reach the target is not uniquely determined. For this reason, the authors reduced the number of control inputs by linking the angles of the tail and the canard wings at a certain ratio. The motion control simulations confirmed that the pitch and heave can be controlled almost independently, demonstrating the superiority of the multi-winged towed vehicle over conventional ones. © 2023 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Motion control

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Effect of Sn addition on electrochemical activity of ribbons of Mg-Al-Ca anode material for rechargeable magnesium batteries fabricated by rapid solidification

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Keikinzoku/Journal of Japan Institute of Light Metals 2025年第1期75卷 9-13页

作者： Fukuta, Yoshitaka Kikura, Kensei Tsukeda, Tadayoshi Aida, Tetsuo Tabata, Hironobu Kurihara, Hideki Suzuki, Mayumi Program of Materials Science and Engineering Studies in Science and Engineering Graduate School of Science and Engineering University of Toyama 3190 Gofuku Toyama-shi Toyama930-8555 Japan Graduate School of Science and Engineering University of Toyama Toyama-shi Toyama Japan Faculty of Sustainable Design Academic Assembly University of Toyama Toyama-shi Toyama Japan CHUETSU METAL WORKS CO. LTD. Nakaniikawagun Toyama Japan Saitama Industrial technology Center Kawaguchi-shi Saitama Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Imizu-shi Toyama Japan

Magnesium-based batteries are potential candidates for next-generation rechargeable batteries due to the divalent nature of magnesium cations and the natural abundance of magnesium resources. In this study, the electrochemical activity of Mg-6mass%Al-3mass%Ca anodes combined with Sn was investigated. Thin ribbons of the anode specimens were prepared by a single-roll rapid solidification method. The results showed that the electrochemical activity increased upon adding 1 mass% Sn, while it decreased for 3 mass% Sn. Based on the results of an X-ray diffraction analysis, the addition of Sn led to the formation of Mg2Sn and Ca2Sn phases, which increased the lattice distortion. Scanning electron microscopy observations indicated that these secondary phases were homogeneously distributed for 1 mass% Sn addition, while they were coarsely distributed for 3 mass% Sn. © 2025 The Japan Institute of Light Metals.

关键词： X ray diffraction analysis

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BLOCKCHAIN TECHNOLOGY FOR TRACEABILITY OF HAZARDOUS MATERIAL IN SEAPORTS 50

BLOCKCHAIN TECHNOLOGY FOR TRACEABILITY OF HAZARDOUS MATERIAL...

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50th International Conference on Computers and Industrial engineering: Sustainable Digital Transformation, CIE 2023

作者： Alshaikh, R. Ahmed, V. Bahroun, Z. Engineering Systems and Management PhD Program College of Engineering American University of Sharjah Sharjah United Arab Emirates Department of Industrial Engineering American University of Sharjah Sharjah United Arab Emirates

ISBN: (纸本)9781713886952

Maritime shipping plays a pivotal role in the global transportation system, providing safety and cost-effectiveness. However, it encounters numerous challenges, including port congestion, delivery delays, complex paperwork, unreliable reports on hazardous materials, and difficulties in tracing containers. To address these issues and mitigate risks associated with the transportation of hazardous goods, researchers have explored the implementation of blockchain technology in the maritime sector. Blockchain offers decentralization, transparency, and auditability of transactions, as well as the ability to trace and track cargo, particularly hazardous materials. Despite its potential, there is limited research available on the practical implementation of blockchain for hazardous material traceability. This research paper aims to investigate the application of blockchain technology in enhancing hazardous material traceability in seaports, contributing to the growing body of knowledge regarding blockchain's potential in this area and providing valuable insights for future research and practical implementations. Moreover, the paper suggests a preliminary framework for an optimized blockchain algorithm for hazardous material traceability. The main findings highlight the significant potential of blockchain technology in improving traceability of hazardous materials in seaports. Real-time tracking and monitoring of hazardous materials from origin to destination can be achieved through blockchain's distributed nature, reducing the risk of data manipulation or fraud. The immutability of blockchain records ensures the integrity and accuracy of critical data related to material composition, handling procedures, and safety certifications. Furthermore, blockchain's decentralized control allows for collaborative traceability in seaports, involving stakeholders such as port authorities, shipping companies, regulatory bodies, and manufacturers. This distributed governance model promote

关键词： Blockchain

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A Reliability-Driven Design and Test (ReDDT) methodology for space nuclear power and propulsion systems

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Journal of Space Safety engineering 2025年第1期12卷 53-65页

作者： Thomas, Dr. L. Dale Rawlins, Samantha Raghu, Shreyas Lakshmipuram Aueron, Alexander Department of Industrial & Systems Engineering and Engineering Management The University of Alabama in Huntsville 301 Sparkman Drive Huntsville 35899 AL United States Department of Mechanical and Aerospace Engineering The University of Alabama in Huntsville 301 Sparkman Drive Huntsville 35899 AL United States

The development methodology employed in the United States’ Rover NERVA program is reviewed as the basis for the Reliability-Driven Design and Test (ReDDT) methodology described herein. Postulated as perhaps the first full programmatic implementation of probabilistic design, the NERVA foundational methodology appears to have never been adopted elsewhere following program cancelation. Nevertheless, much of the framework developed during NERVA remains applicable, and the ReDDT approach described in this work is based upon their approach. The ReDDT approach builds on the NERVA method by introducing a qualitative failure mode analysis to identify which tests are most useful and maximize program efficiency. The qualitative analysis is supported by uncertainty analysis, which is applied to identify the drivers of the system's technical uncertainty and thereby drivers of safety and reliability. The ReDDT approach is distinct from existing reliability-based methodologies including Reliability Based Design Optimization (RBDO) and Design for Reliability (DfR) in that ReDDT focuses on concurrent and synergistic system design, integration, and test planning. ReDDT has been developed for NASA's current Space Nuclear Propulsion effort, but it has broader applicability to nuclear power systems and complex aerospace system developments and upgrades in general. The ReDDT methodology has the goal of transforming the relationship of the design effort to the integration and test effort within a system development from one of test-fail-fix to model-test-evaluate. © 2025 International Association for the Advancement of Space Safety

关键词： Integration and test strategy Model based design Reliability informed design Uncertainty analysis

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Parenting Support System Based on Improved VGG19 Network 24

Parenting Support System Based on Improved VGG19 Network

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7th International Conference on Software engineering and Information management, ICSIM 2024

作者： Zhang, Yan Li, Jiacheng Noto, Masato Field of Electrical Electronics and Information Engineering Graduate School of Engineering Kanagawa University Yokohama Japan Department of Applied Systems and Mathematics Kanagawa University Yokohama Japan

ISBN: (纸本)9798400709197

Deep Convolutional Neural Networks (CNNs) have made significant advancements in Infant Facial Expression Recognition (FER) tasks. However, conventional methods for emotion recognition face challenges such as sample imbalance, lack of diversity, large model parameters, long training times, and low accuracy. In response, we propose an approach for infant facial expression recognition based on an improved VGG19 (Visual Geometry Group) network. Our approach utilizes the ImageDataGenerator data augmentation technique to enhance data diversity, and we also introduce architectural improvements to the model and design a custom loss function. After numerous experiments and research iterations, our experimental findings demonstrate that this approach not only reduces training time but also significantly reduces the number of model parameters while slightly improving accuracy. Most importantly, we successfully applied the enhanced model to a parenting support system and were able to provide strong support for real-life infant emotion analysis and recognition. This research outcome holds significant implications for the fields of infant care and emotion detection. © 2024 ACM.

关键词： Emotion Recognition

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RIM Experiment on Fuel Adhesion Characteristics of Inclined-Wall-Impinging Spray under Cross-Flow Conditions 10

RIM Experiment on Fuel Adhesion Characteristics of Inclined-...

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10th International Conference on Modeling and Diagnostics for Advanced Engine systems, COMODIA 2022

作者： Zhang, Gengxin Shi, Penghua Luo, Hongliang Ogata, Yoichi Nishida, Keiya Department of Mechanical Systems Engineering Graduate School of Engineering University of Hiroshima Japan Mechanical Engineering Program Graduate School of Advanced Science and Engineering University of Hiroshima Japan

The impingement of fuel sprays on the piston surface significantly affects mixture formation, combustion performance, and pollutant emissions in Direct-Injection Spark-Ignition (DISI) engines. To better understand the fuel adhesion behavior, the fuel adhesion characteristics of fuel spray impinging on the flat wall under cross-flow condition were investigated in this work. Refractive Index Matching (RIM) were employed to observe the propagation of fuel adhesion. Then the area, mass, and thickness of fuel adhesion were evaluated under various cross-flow velocities. Also, the propagation mechanism and lifetime prediction of fuel adhesion under the cross-flow conditions were revealed. The experimental results can provide necessary guidance on the operating conditions of airflow inside the engine. © 2022 by the Japan Society of Mechanical Engineers All rights reserved.

关键词： Adhesion

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Identification of benefits, challenges, and pathways in E-commerce industries: An integrated two-phase decision-making model

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Sustainable Operations and Computers 2023年第1期4卷 200-218页

作者： Gupta, Srikant Kushwaha, Pooja.S. Badhera, Usha Chatterjee, Prasenjit Gonzalez, Ernesto D.R. Santibanez Department of Operations and Decision Sciences Jaipuria Institute of Management Jaipur India Department of Business Analytics Jaipuria Institute of Management Indore India Department of Business Analytics Jaipuria Institute of Management Jaipur India Department of Mechanical Engineering MCKV Institute of Engineering West Bengal 711204 India Post-Doctoral Fellow Management Graduate Program Universidade Paulista Indianópolis Campus Brazil Department of Industrial Engineering and CES 4.0 Faculty of Engineering University of Talca Curico Chile

The e-commerce industry has seen significant growth over the past decade as it focuses on convenience and accessibility, leading to a surge in online shopping with more and more consumers opting for it. At the same time, the e-commerce industry faces various challenges. In order to fully harness the potential of this industry, it is important to identify its benefits and challenges and focus on pathways to mitigate the challenges and harness its growth. This study utilizes the Delphi approach and involves experts from the e-commerce domain to get their opinions to identify the top ten benefits, challenges, and pathways for the e-commerce industry. Analytic Hierarchy Process (AHP) and Criteria Importance Through Intercriteria Correlation (CRITIC) methods are subsequently, employed to prioritize the identified factors. Results of the study revealed that factors such as affordable advertising & marketing;availability and product variety;and Global reachability are the most important benefits, while technological upgradation;returns or refunds;and counterfeit products posed the greatest challenges for the industry. Government compliance check;better relationship with delivery partners;and strong data privacy and online security policies emerged as the best pathways. This study also provides valuable insights to businesses, policymakers, and researchers in the e-commerce industry on how to navigate the benefits, challenges, and pathways of this rapidly growing sector. © 2023

关键词： Electronic commerce

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Impact of Mentoring Relationships on Perceived Quality Of Life among engineering graduate Students 67th

Impact of Mentoring Relationships on Perceived Quality Of Li...

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67th International Annual Meeting of the Human Factors and Ergonomics Society, HFES 2023

作者： McCallum, Mariah Godwin, Ian Ma, Jiahui Barlow, Hailey Gamage, Dimantha Kottawa McCrory, Bernadette Industrial and Management Systems Engineering Department of Mechanical and Industrial Engineering Montana State University BozemanMT United States

graduate students’ experiences bring on unprecedented challenges, influenced by physical, psychological, social, and environmental factors. Through a productive and authentic mentor-mentee relationship, it was hypothesized graduate students would be more satisfied with their graduate experience. An instrument was developed using the 26-item World Health Organization Quality of Life questionnaire consisting of four health domains (physical, psychological, social relationships, environmental) and additional questions on psychosocial help and the graduate student’s satisfaction with their advisors and overall graduate school experience. Overall, graduate students who were satisfied with their mentoring experience had a higher quality of life (QoL). graduate students’ QoL was lower in social relationships (p=0.009) and psychological domains (p=0.000), similar to medical school students. Second-and third-year graduate students had lower QoL than those in the first or fourth+ year. graduate students were satisfied with their overall mentoring experience, and better mentoring experience tended to have better QoL. © 2023 Human Factors and Ergonomics Society.

关键词： Mentoring Relationship Psychosocial Help World Health Organization Quality of Life

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Design and Analysis of a Vertical Electric Ducted Fan for Unmanned Aerial Vehicles 7

Design and Analysis of a Vertical Electric Ducted Fan for Un...

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2023 7th International Conference on Mechanical, Aeronautical and Automotive engineering, ICMAA 2023

作者： Shiau, Y.R. Fang, J. Huang, Y.C. Department of Industrial Engineering and Systems Management Feng Chia University Taichung407 Taiwan Department of Aerospace and Systems Engineering Feng Chia University Taichung407 Taiwan Ph.D. Program of Mechanical and Aeronautical Engineering Feng Chia University Taichung407 Taiwan

Several types of multirotor unmanned aerial vehicles (UAVs) are widely used in various industrial activities. UAVs with electric ducted fans (EDFs) have been developed to mitigate the risks associated with rotary blades, which are installed on the exterior structure of conventional UAVs and exposed to the ambient environment. Particularly, vertical EDFs have become a focus in the field of UAV design because they require less space for the flow channel compared with horizontal EDFs. In this study, a vertical EDF UAV model was developed. Structural and flow field analysis was performed in Ansys software to determine the optimal design configuration. The results confirmed that the designed model facilitated smooth air flow with favorable inlet and outlet velocity. The vehicle structure required minor adjustment to reduce the frequency of occurrence of vortices. Overall, this study made two research contributions. First, an EDF UAV model was developed to mitigate the risk of rotary blades being exposed to the ambient environment. Second, a vertical EDF system was proposed to reduce the flow channel space and maintain the outlet velocity, thereby improving the takeoff, landing, and thrust performance of UAVs. © 2023 Institute of Physics Publishing. All rights reserved.

关键词： Channel flow

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