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Improvement of Deep Groove Ball Bearing’s Performance Using a Bionic Textured Inner Race

Journal of Bionic engineering 2021年第4期18卷 974-990页

作者： K.E.Ch.Vidyasagar R.K.Pandey Dinesh Kalyanasundaram Center for Biomedical Engineering Indian Institute of Technology DelhiNew Delhi110016India Department of Biomedical Engineering College of EngineeringOsmania UniversityHyderabad500007India Department of Mechanical Engineering Indian Institute of Technology DelhiNew Delhi110016India Department of Biomedical Engineering All India Institute of Medical SciencesNew Delhi110029India

Micro-textured surfaces have improved the tribological performance of contact surfaces under lubricated conditions;however,not practiced due to manufacturing *** addition to simpler micro-pits or straight-trench type textures,sophisticated bioinspired textures on commercial radial ball bearings have been scarcely *** this work,Dendroaspis polylepis(Mamba snake)skin-type textures were fabricated on the inner race of FAG radial ball bearings using a nanosecond fiber laser *** the snake textures were primarily meant to enhance friction,the dimensions of the texture have been carefully chosen to improve the tribological performance under lubricated *** textured bearings were assembled and experimented at various rotational speeds and lightly loaded conditions to measure vibrational amplitude,frictional torque,and temperature *** to untextured(conventional)bearing,the snake-skin type textured bearings resulted in improved tribo-dynamic performance.

关键词： bionic texture radial ball bearing frictional torque vibration temperature

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Development of a Gesture Analysis System for Human System Interaction 13

Development of a Gesture Analysis System for Human System In...

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Joint 13th International Conference on Soft Computing and Intelligent Systems and 25th International Symposium on Advanced Intelligent Systems, SCIS and ISIS 2024

作者： Matsumoto, Chifuyu Sone, Yuka Woo, Jinseok Ohyama, Yasuhiro Graduate School of Engineering Tokyo University of Technology Sustainable Engineering Program 1404-1 Katakuracho Hachioji Tokyo192-0982 Japan School of Engineering Tokyo University of Technology Department of Mechanical Engineering 1404-1 Katakuracho Hachioji Tokyo192-0982 Japan

ISBN: (纸本)9798350373332

Recently, Japan has been facing various social issues, and to solve these problems, it is necessary to create a society where diverse people can live comfortably. To build such a society, appropriate support tailored to individuals is required, necessitating the analysis of various types of information to understand the people's needs at any given moment. In particular, analyzing non-verbal elements such as posture, facial expressions, and gestures is crucial, as these naturally indicate a person's condition. Therefore, this study focuses on human gestures, one of the non-verbal elements, and proposes a gesture recognition method using Dynamic Time Warping (DTW) and K-Means. We demonstrated that symbolic gesture recognition is possible by recording arm trajectories from skeletal measurements with an RGB-D camera. © 2024 IEEE.

关键词： Gesture recognition

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THE PREVALENCE AND POTENTIAL EFFECTS OF DISTRACTIONS IN GENERAL SURGERY: A MIXED-METHODS STUDY 66th

THE PREVALENCE AND POTENTIAL EFFECTS OF DISTRACTIONS IN GENE...

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66th International Annual Meeting of the Human Factors and Ergonomics Society, HFES 2022

作者： Ayas, Suzan Donmez, Birsen Kazlovich, Kate Lombardi, Selena Jain, Ashna Department of Mechanical and Industrial Engineering University of Toronto United States Department of Biomedical Engineering University of Toronto United States

Distractions can interfere with surgical tasks and may negatively impact task performance, surgery duration, and mood of surgical team members. A mixed-methods study was conducted to examine the prevalence and potential effects of distractions during general surgery, in particular during the surgical procedure and post-operative counts. An audio-video recording platform named the OR BlackBox® was used to record data from 40 surgical cases, which was in turn coded by multiple raters. Supporting qualitative data was collected through interviews with four OR staff members. The audio-video data revealed that distractions occurred on the average about every three minutes during the surgical procedure, and most frequently observed effect was distracted members not noticing other members’ requests. Twenty-nine of the cases had at least one changeover during the surgical procedure whereas overall four changeovers occurred during post-operative counts;in one of these cases the count was repeated, resulting in a delay of almost 15 minutes. Other distractions (OR traffic, communication, and others) were frequent both during the surgical procedure (M=0.39 per minute per case, SD=0.15) and post-operative counts (M=0.75 per minute per case, SD=0.44). The interviews were preliminary in nature and provided additional insights on the effects of OR distractions and potential mitigation strategies to inform future OR distraction research. © 2022 by Human Factors and Ergonomics Society. All rights reserved.

关键词： Ergonomics

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Propagating acoustic waves on a culture substrate regulate the directional collective cell migration

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Microsystems & Nanoengineering 2021年第6期7卷 87-96页

作者： Chikahiro Imashiro Byungjun Kang Yunam Lee Youn-Hoo Hwang Seonghun Im Dae-Eun Kim Kenjiro Takemura Hyungsuk Lee Institute of Advanced Biomedical Engineering and Science Tokyo Women’s Medical UniversityShinjukuJapan Department of Mechanical Engineering Keio UniversityYokohamaJapan School of Mechanical Engineering Yonsei UniversitySeoulKorea

Collective cell migration plays a critical role in physiological and pathological processes such as development,wound healing,and *** studies have demonstrated how various types of chemical,mechanical,and electrical cues dictate the collective migratory behaviors of *** an acoustic cue can be advantageous because of its noninvasiveness and biocompatibility,cell migration in response to acoustic stimulation remains poorly *** this study,we developed a device that is able to apply surface acoustic waves to a cell culture substrate and investigated the effect of propagating acoustic waves on collective cell *** migration distance estimated at various wave intensities revealed that unidirectional cell migration was enhanced at a critical wave intensity and that it was suppressed as the intensity was further *** increased migration might be attributable to cell orientation alignment along the direction of the propagating wave,as characterized by nucleus *** actin bundles indicative of a high traction force were observed in cells subjected to propagating acoustic waves at the critical *** device and technique can be useful for regulating cellular functions associated with cell migration.

关键词： healing collective stimulation

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Automatic Detection of Cardiac Arrhythmia Using Deep Transfer Learning based Approach on ECG

Automatic Detection of Cardiac Arrhythmia Using Deep Transfe...

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2023 International Conference on Recent Advances in Electrical, Electronics and Digital Healthcare Technologies, REEDCON 2023

作者： Khan, Shahab Ahmad Afzal, Ahmad Bin Khan, Mudassir Hasan Khan, Yusuf Uzzaman Sarfraz, Mohammad Khan, Munna Aligarh Muslim University Department of Mechanical Engineering Aligarh India Aligarh Muslim University Department of Electrical Engineering Aligarh India Aligarh Muslim University Centre for Biomedical Engineering Aligarh India Jamia Millia Islamia Department of Electrical Engineering New Delhi India

ISBN: (纸本)9781665493826

With the frequency of cardiovascular issues rising, the automated categorization analysis of electrocardiogram signals (ECG) has become important in the medical assessment of disorders. A convolutional neural network (CNN)-based method is recommended for classifying ECG signals. Convolutional neural networks (CNNs) used in the deep learning technique may automatically detect ECG data without the need for simple manual feature extractions, but they need a lot of attention. In this work, AlexNet and ResNet-18, two pre-trained deep learning networks, were utilized to identify and detect cardiac arrhythmia, and their performance was evaluated across a number of metrics. There were some modifications within the layers of the two proposed CNN models for classifying cardiac arrhythmias, and spectrograms were employed as the model's input images. The practical findings demonstrate that the suggested method outperforms various well-used ECG classification methods, achieving promising classification accuracy, sensitivity, and precision of greater than 99%. Although, along with different learning rates and other modifications, the epoch sizes and minimum batch sizes were hyperparameters that were adjusted, the results were still impressive. © 2023 IEEE.

关键词： Electrocardiograms

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Towards Trajectory Tracking Control of a Flexible Tube Manipulator 23

Towards Trajectory Tracking Control of a Flexible Tube Manip...

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6th International Conference on Advances in Robotics, AIR 2023

作者： Bhatt, Nisha Singla, Ashish Soni, Sanjeev Department of Mechanical Engineering Thapar Institute of Engineering and Technology Patiala147001 India Biomedical Applications Group CSIR-Central Scientific Instruments Organization Chandigarh160030 India

ISBN: (纸本)9781450399807

The present work discusses the development and control of an antagonistic shape memory alloy (SMA) springs actuated flexible tube manipulator (FTM) which demonstrated its capabilities in trajectory tracking applications. A detailed design of FTM is followed by its experimental validation on two basic 2-D trajectories namely square and pocket square. The experimental results demonstrate the satisfactory performance of the proposed manipulator in tracking drawn trajectories. It has aspired that the proposed manipulator can be utilized for medical applications if it is able to track more 2-D trajectories like circle and ellipse that are frequently encountered in medical applications. © 2023 ACM.

关键词： Trajectories

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Live Demonstration: A fully embedded adaptive real-time hand gesture classifier leveraging HD-sEMG and deep learning

Live Demonstration: A fully embedded adaptive real-time hand...

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2023 IEEE biomedical Circuits and Systems Conference, BioCAS 2023

作者： Isabel, Xavier Labbe, Thomas Chamberland, Felix Buteau, Etienne Campbell, Evan Cote-Allard, Ulysse Tam, Simon Fortier, Paul Campeau-Lecours, Alexandre Boukadoum, Mounir Scheme, Erik Gosselin, Benoit Laval University Electrical Engineering and Computer Engineering Department Canada University of New-Brunswick Institute of Biomedical Engineering Canada University of Oslo Department off Technology Systems Norway Laval University Mechanical Engineering Department Canada University of Quebec at Montreal Computer Science Department Canada

ISBN: (纸本)9798350300260

In a fully immersive virtual reality setting, visitors will actively participate in our demonstration, engaging in an interactive videogame utilizing our cutting-edge HD-sEMG Bracelet. Prior to this, they will undergo state-of-the-art training to personalize their machine learning gesture recognition model. The gameplay will be broadcast on a computer monitor, allowing onlookers to observe while the demonstrator explains the core concept of our work. By wearing the bracelet, the player gains control over their limb in a game inspired by Simon Says. Throughout the demonstration, visitors will gain firsthand experience and knowledge about the forthcoming advantages of HD-sEMG for control applications, such as prosthesis control. They will also discover how the EMaGer HD-sEMG Bracelet capitalizes on its uniform and high electrode density to enhance the reliability of hand gesture recognition models utilized in myoelectric prosthesis control. © 2023 IEEE.

关键词： Armband Control Convolution Deep Learning Edge Computing Electromyography Gesture HD-EMG Machine Learning Myoelectric Neural Network

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Work in Progress: Project-Based, Multilevel Teamwork for First-Year engineering program

Work in Progress: Project-Based, Multilevel Teamwork for Fir...

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2024 ASEE Annual Conference and Exposition

作者： Assanah, Fayekah Garcia, Jorge Paricio Scoggin, Jake Huber, Martin Cohen, Michael Santos, Stephany Ionkin, Kathrine Pavel Hirt, Sean Patrick Russell, Britney Hubbard, Cameron Hirt, Sean University of Connecticut United States Department of Biomedical Engineering University of Connecticut United States School of Mechanical Aerospace and Manufacturing Engineering University of Connecticut United States School of Computing University of Connecticut United States Department of Civil and Environmental Engineering University of Connecticut United States Department of Chemical and Biomolecular Engineering University of Connecticut United States

The long process of educating a new generation of engineers requires more than just the progressive accumulation of classes as students move through a departmental *** education goes beyond solving equations and retaining systematic *** requires cultivating ethical values, honing creative skills in engineering, working collaboratively and iteratively, and solving complex problems in a multidisciplinary *** Accreditation Board of engineering and Technology (ABET) formally acknowledged the importance of these notions in their most recent requirements-(students' outcome 5): "an ability to function effectively on a team whose members together provide leadership, create a collaborative and inclusive environment, establish goals, plan tasks, and meet objectives." Project-based teamwork is particularly crucial in a first-year engineering design *** experiential learning environment promotes acquiring essential skills and abilities that will be used in future projects throughout their *** addition, multidisciplinary teams cultivate a respectful and inclusive work environment, support a deeper understanding of engineering concepts, and encourage students to apply these concepts to meaningful solutions to engineering problems while nurturing a healthy and interactive classroom *** Work in Progress paper describes the design and implementation of a semester-long project as part of the first-year design class at the University of Connecticut and how it promoted teamwork on *** class had over 400 first-year engineering students (from all engineering fields except computing) divided into 16 multidisciplinary sections, all working in the First-Year Design *** in each section were further divided into smaller groups of 4-5 students using the guidelines on equitable teams and inclusion discussed in the *** ten-week project emphasized improved collaboration and teamwork through it

关键词： Students

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Design of the Continuous Gravity-Driven Multiple-Effect Thermal System (G-METS) for Efficient Low-Cost Magnesium Recycling

Design of the Continuous Gravity-Driven Multiple-Effect Ther...

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Magnesium Technology Symposium held during the 152nd TMS Annual Meeting and Exhibition, TMS 2023

作者： Sehar, Daniel Mcarthur Espinosa, Gabriel Telgerafchi, Armaghan Ehsani Chinwego, Chinenye Lynch, Keira Perrin, Benjamin Powell, Adam Materials Science and Engineering Program Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States 100 Institute Rd WorcesterMA01609 United States

ISBN: (纸本)9783031226458

Recent global supply shortages, combined with need for light-weight structural components for efficient transportation, have led to very high prices for magnesium due to its low density and high part stiffness/weight. This study continues prior work on magnesium recycling using multiple-effect distillation with gravity as the parameter to create the pressure difference between effects, called G-METS. The long-term vision is for continuous distillation, but experiments to date have only used batch distillers with maximum rate of 1 kg/h. and minimum energy consumption of 2 kWh/kg. This study presents the design of laboratory-scale continuous distiller including a custom-made furnace to sustain a high-power density and temperature gradient for rapid boiling and efficient recovery of magnesium. © The Minerals, Metals & Materials Society 2023.

关键词： Distillation

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Quantifying Joint Movement Variability in Healthy and Hemiplegic Gait using OpenSim 2

Quantifying Joint Movement Variability in Healthy and Hemipl...

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2nd IEEE International Conference on Interdisciplinary Approaches in Technology and Management for Social Innovation, IATMSI 2024

作者： Rafiq, Tabassum Younis, Sadia Narayan, Jyotindra Institute of Information Management and Technology Department of Biotechnology Uttar Pradesh Aligarh202001 India Government College of Engineering and Technology Department of Biomedical Engineering Jammu and Kashmir Ganderbal193504 India Indian Institute of Technology Guwahati Mechatronics and Robotics Laboratory Department of Mechanical Engineering Assam Guwahati781039 India

ISBN: (纸本)9798350360523

This study delves into the scaling capabilities of OpenSim, a biomechanical modeling tool, to scrutinize musculoskeletal alterations accompanying the hemiplegic condition compared to a healthy model. Contralateral hemiplegia (CH), characterized by unilateral paralysis, induces profound changes in bone size and significantly influences an individual's gait. Motivated by understanding the biomechanical repercussions of CH on human movement, we conducted a comprehensive investigation involving ten patients with CH, with a median age of 46 years (range: 39 to 52.0 years and height: 1.75 0.6 m). Ten healthy controls with similar body attributes were±also recruited. We assessed musculoskeletal changes post-CH using bone length data from MRI reports obtained from a hospital. Inverse kinematics in OpenSim are facilitated for a detailed comparison of joint angles between unhealthy and healthy individuals. The gait data is visualized and analyzed using statistical metrics such as mean absolute deviation, box plots, and a two-sample t-test. The results revealed significant differences in hip and ankle joint angles between healthy and hemiplegic individuals, underscored by low p-values. Interestingly, no significant difference was observed in knee joint angles (p-value = 0.9126). These findings contribute to a valuable understanding of hemiplegia-related musculoskeletal changes, offering potential avenues for tailored interventions to improve mobility and quality of life. © 2024 IEEE.

关键词： Inverse kinematics

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