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9th International Conference on Advances in Machinery, Materials Science and engineering Applications, MMSE 2023

作者： Udoye, N.E. Asikoko, F.C. Fayomi, O.S.I. Okeniyi, J.O. Department of Mechanical Engineering College of Engineering Covenant University Ota Lagos state Nigeria Department of Mechanical and Biomedical Engineering Bells University of Technology Ogun State OtaP.M.B 1015 Nigeria Department of Mechanical Engineering Science University of Johannesburg Johannesburg2006 South Africa

ISBN: (纸本)9781643684383

Traditional materials have certain restrictions in an industrial application today inhibiting them from the attainment of the best blend of toughness, density and strength. The paradigm shift in the use of agro-waste products as particulate reinforcement is an excellent choice owing to the inexpensive and availability of the desired agro-waste product. This research focuses on the development of AA6061 aluminium alloy through stir casting method using kaolinite clay as the reinforcement agent in increasing weight percentages of 2.5wt %, 5wt %, 7.5wt % and 10wt %.. The use of agro-waste as reinforcements is possible as the clay kaolinite was effectively infused into the pure matrix for composites to be constructed. The tensile strength was highest at the addition of 10 wt % of clay kaolinite. Brinell's hardness test showed an increase in value with an increase in the mass fraction of clay. It was observed from the results of the tests carried out that the reinforced specimens exhibited improved hardness when analyzed using Brinell's hardness machine. Some of these properties improved with the increase in weight percentage of reinforcement particles. This research has shown the importance of agricultural waste to material engineers, material handlers and metallurgists in our society and that it is the right way to go. © 2023 The Authors.

关键词： Kaolinite

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Experimental Study of Electrical Wheelchair Usage Using Myoelectric Signals Control for User With Disability

Experimental Study of Electrical Wheelchair Usage Using Myoe...

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2024 International Conference on Computer engineering, Network and Intelligent Multimedia, CENIM 2024

作者： Ramadhani, Muhammad Rafli Arifin, Achmad Arrofiqi, Fauzan Suprayitno, Eko Agus Risciawan, Andra Hakim, M Lukman Institut Teknologi Sepuluh Nopember Biomedical Engineering Department Surabaya Indonesia Manufaktur Robot Industri Surabaya Indonesia Institut Teknologi Sepuluh Nopember Industrial Mechanical Engineering Department Surabaya Indonesia

ISBN: (纸本)9798350368802

Paralysis leads to loss of motor or sensory function, and electric wheelchairs help restore mobility. With advancing technology, electric wheelchairs can now be controlled using myoelectric signals from muscles like the carpi radialis. This research focused on testing the performance of electric wheelchairs controlled by myoelectric signals based on the user's intention. Subjects with disabilities performed various scenarios to move the wheelchair, achieving a 92.22% accuracy in classifying motion commands. A PID control system was suggested to maintain wheelchair balance and speed. However, further development is needed for motion command classification, especially for users with cerebral palsy and hemiplegia. The findings support future advancements in electric wheelchairs for disabled patients. © 2024 IEEE.

关键词： Wheelchairs

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UZrCN Formation via Arc Melting - A Novel Synthesis Study

UZrCN Formation via Arc Melting - A Novel Synthesis Study

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2024 Transactions of the American Nuclear Society on Winter Conference and Expo, ANS 2024

作者： Sanches, David Zilllinger, James Hamilton, Sarah Idaho National Laboratory Idaho FallsID United States Nuclear Engineering Program Mechanical Engineering Department Virginia Tech BlacksburgVA United States

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A Proposed Model for Calculate the Number of Mammography Machines for the South-West Area of Mexico 9th

A Proposed Model for Calculate the Number of Mammography Mac...

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9th Latin American Congress on biomedical engineering, CLAIB 2022 and 28th Brazilian Congress on biomedical engineering, CBEB 2022

作者： Martinez-Licona, Fabiola M. Martinez-Vazquez, Cipactli M. Electrical Engineering Department Universidad Autonoma Metropolitana Iztapalapa Mexico City Mexico Universidad Autonoma Metropolitana Biomedical Engineering Academic Program Iztapalapa Mexico City Mexico

ISBN: (纸本)9783031494093

Breast cancer is a global health problem. Mexican statistics show that 28.2% of new cancer cases in women come from the breast, so efforts must be made to control the burden of the disease. Early detection is an essential part of the social programs aimed at female populations at potential risk, and mammography machines are the technology used to perform screening methods. The possible coverage of a region is mainly affected by the available technological resources. This paper presents a proposal model to determine the number of mammography machines required to meet the State’s requirements of Guerrero, Oaxaca and Chiapas, as those in which there are municipalities with the highest social backwardness. The socioeconomic and demographic determinants, as well as the screening mammography demand data, were extracted from official Mexican agencies. The model variables were selected from the categories of target population, epidemiological indicators and infrastructure. Under the author’s heuristic assumptions, the analytic hierarchy process produced the weight that led to selecting the final set of variables. The resource allocation principles were used to adapt the Resource Allocation Working Party (RAWP) focus formula from population to equipment to calculate the State Weighted Machines using the mentioned category adjustments. Model results with 2017 and 2020 data showed that, on average, 50% more mammography machines are needed to cover around 46% of the female population 50–64 years old in the studied States. Further study and analysis of the determinants of access to the service and the equipment proposals are necessary. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Resource allocation

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Analysis of Failure Causes in the Mammography Machines 9th

Analysis of Failure Causes in the Mammography Machines

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9th Latin American Congress on biomedical engineering, CLAIB 2022 and 28th Brazilian Congress on biomedical engineering, CBEB 2022

作者： Hernandez-Contreras, Indira Martinez-Licona, Fabiola M. Electrical Engineering Department Universidad Autonoma Metropolitana Iztapalapa Mexico City Mexico Universidad Autonoma Metropolitana Biomedical Engineering Academic Program Iztapalapa Mexico City Mexico

ISBN: (纸本)9783031494093

Patient safety arises from the need to prevent and protect patients from avoidable mistakes. Two fundamental concepts that shape patient safety are error and adverse events, the consequences may range from potentially dangerous complications, slow recoveries, high medical costs, or unnecessary deaths. Breast cancer has become a global health problem with one of the most expensive burdens among non-communicative diseases. Since screening mammography is the most used method for tumor identification, patient safety applied to this technology is focused on delivering safe and effective service that results in an accurate and reliable diagnosis. This paper presents the analysis of the causes that can induce a potential failure in the mammography machine, and the actions to correct them. We used a risk analysis approach to identify the failures that may occur while using a mammography machine in screening programs. We extracted the information about the failures from specialized consultation and discussion forums and technical and operation manuals. We adapted the concepts of severity, occurrence, and detection involved in calculating the risk priority number according to the Failure Mode and Effects Analysis method, assigning them one of three levels (low, medium, and high). The adapted risk priority level was calculated from the averaged product of levels from the mentioned components. The results were mapped into an Ishikawa diagram, and an action procedure proposal was shown. The causes found are defined mainly concerning the handling of the equipment components, although causes related to the acquisition technique, patient handling, and availability of support information. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Risk assessment

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Feature-oriented vibrations in LCD-based vat photopolymerization

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Journal of Manufacturing Processes 2025年 148卷 224-236页

作者： Xu, Han Li, Qizhou Zhang, Shangxiong Pu, Changyuan Chen, Yizhu Chen, Yong Center for Advanced Manufacturing University of Southern California Los AngelesCA90007 United States Department of Aerospace and Mechanical Engineering University of Southern California Los AngelesCA90089 United States Department of Industrial and Systems Engineering University of Southern California Los AngelesCA90089 United States Department of Biomedical Engineering University of Southern California Los AngelesCA90089 United States

Liquid crystal display (LCD)-based vat photopolymerization (VPP) is a versatile and accessible 3D printing technology due to its low cost and fast printing speed. It is ideal for applications requiring rapid fabrication of high-resolution intricate geometry. However, as the feature size approaches the resolution limit (a single pixel) of the LCD mask, undesirable pixelated aliasing emerges, resulting in increased roughness and dimensional inaccuracies. This study introduces a new feature-oriented vibration method in LCD-based VPP to enhance linear feature fabrication precision. Coupled with grayscale mask images, it can significantly reduce pixelated aliasing and improve dimensional accuracy in printing linear features. In this method, the mask images are vibrated along the direction of a linear feature to enhance its feature smoothness while maintaining dimensional accuracy. The vibration amplitude is optimized based on the simulation of the printing results derived from the light energy model of the LCD mask. This method achieves up to a 4× improvement in line roughness (0.6 μm–1.5 μm) compared to conventional vat photopolymerization (1.2 μm–5.9 μm) and demonstrates precise dimensional control with subpixel-level (10 μm) accuracy for an LCD with 50 μm pixel size. The advantages of the feature-oriented vibration method are further highlighted through the fabrication of honeycomb metamaterials with enhanced strength and micro-filters with customizable shapes and mesh sizes. The study demonstrates that controlled vibrations provide an effective path for future VPP development in microstructure fabrication. © 2025 The Society of Manufacturing Engineers

关键词： Masks

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Implementation and calibration of spectroscopic single-molecule localization microscopy

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BMC Methods 2025年第1期2卷 1-20页

作者： Brenner, Benjamin Yeo, Wei-Hong Lee, Youngseop Kweon, Junghun Sun, Cheng Zhang, Hao F. Department of Biomedical Engineering Northwestern University Evanston USA Department of Mechanical Engineering Northwestern University Evanston USA

Spectroscopic single-molecule localization microscopy allows multi-color super-resolution images with high spectral sensitivity. While its profile has been steadily growing, it is still under-utilized in biology labs, and the complexity of adoption for existing is prohibitive. In this protocol, we provide essential information for researchers to implement sSMLM in a laboratory setting. We describe how to assemble and optically align the illumination and detection paths of a 3D dual-wedge prism-based sSMLM instrument. We provide detailed step-by-step instructions on performing spectral and axial calibration using fluorescent beads and a nanohole array, respectively. We also discuss using sSMLM to image fluorescently labeled cells and report a new MATLAB package RainbowSTORM v2 to reconstruct super-resolution 3D images. Further, we present representative images as typical anticipated results. By demonstrating an implementation of spectroscopic single-molecule localization microscopy that is simple to implement with commercial microscope systems using freely distributed hardware and by introducing new calibration and image processing user interfaces, we hope to remove some of the barriers to entry that biological labs face when entering the spectroscopic super-resolution field. Ultimately, this protocol will allow users to achieve multi-color super-resolution imaging using a single excitation wavelength.

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Design of a Control System on the HVAC Damper to Regulate Temperature and Humidity in the Isolation Room 4th

Design of a Control System on the HVAC Damper to Regulate Te...

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4th International Conference on Experimental and Computational Mechanics in engineering, ICECME 2022

作者： Salamul Fajar Sabri, M. Rizal, Samsul Kurniawan, Rudi Putra, Rachmad Almi Suheri, Suheri Master of Mechanical Engineering Program Faculty of Engineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Department of Mechanical and Industrial Engineering FacultyofEngineering Universitas Syiah Kuala Banda Aceh23111 Indonesia Doktoral Program Faculty ofEngineering Universitas Syiah Kuala Banda Aceh23111 Indonesia

ISBN: (纸本)9789819974948

Most infectious diseases are caused by viruses that are spread from one person to another through the air. Isolation room is a room that keeps virus in infected people from spreading to other people by maintaining temperature and humidity. Therefore, a system is needed that regulates the isolation room to remain sterile, where this system must control and maintain the stability of air circulation in the room. For this purpose, this study proposes the design of an automated control system to regulate the temperature and humidity in an isolated room by controlling the supply air with damper. The method that is used in making this control system is experimental and analysis from sensor readings that will be used as a sign of decision-making for the damper output that will control the air flow to the isolation room with closed loop algorithm for the system control, the controller will send digital signal to the damper relay based on sensor reading, so that the data results of the experiment and analysis can see whether the control system can work well or not. The successful performance of the control system is seen from results of sensor readings;when the system changed the damper position it can maintain the isolation room situation around 22 °C to 24 °C for temperature and 50% until 60% for the humidity. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Viruses

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programmable Modular Acoustic Microrobots 6

Programmable Modular Acoustic Microrobots

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6th International Conference on Manipulation, Automation, and Robotics at Small Scales, MARSS 2023

作者： Cherukumilli, Subrahmanyam Kirmizitas, Fatma Ceren Sokolich, Max Valencia, Alejandra Karakan, M. Cagatay White, Alice E. Malikopoulos, Andreas A. Das, Sambeeta University of Delaware Department of Mechanical Engineering NewarkDE19716 United States University of Delaware Department of Animal and Food Sciences NewarkDE19716 United States Boston University Department of Biomedical Engineering BostonMA02215 United States Boston University Department of Mechanical Engineering Departments of Biomedical Engineering and Materials Science and Engineering BostonMA02215 United States

ISBN: (纸本)9798350330397

Microrobots have emerged as promising tools for biomedical and in vivo applications, leveraging their untethered actuation capabilities and miniature size. Despite extensive research on diversifying multi-actuation modes for single types of robots, these tiny machines tend to have limited versatility while navigating different environments or performing specific tasks. To overcome such limitations, self-assembled microstructures with on-demand reconfiguration capabilities have gained recent attention as the future of biocompatible microrobotics, since they can address drug delivery, microsurgery, and organoid development processes. Reversible modular reconfiguration structures require specific arrangements of particles that can assume several shapes when external fields are applied. We show how magnetic interaction can be used to assemble cylindrical microrobots into modular microstructures with different shapes. The motion of the formed microstructure is actuated via an external acoustic field, which generates responsive forces in the air bubbles trapped in the inner cavity of the robots. An external magnetic field can also steer these structures. We illustrate these capabilities by assembling the robots into different shapes that can swim and be steered, showing the potential to perform biomedical applications. Furthermore, we confirm the biocompatibility of the cylindrical microrobots used as the building blocks of our microstructure. Exposing Chinese Hamster Ovary cells to our microrobots for 24 hours demonstrates cell viability when in contact with the microrobot. © 2023 IEEE.

关键词： Microstructure

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Rolling Helical Microrobots for Cell Patterning 6

Rolling Helical Microrobots for Cell Patterning

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6th International Conference on Manipulation, Automation, and Robotics at Small Scales, MARSS 2023

作者： Yang, Yanda Kirmizitas, Fatma Ceren Sokolich, Max Valencia, Alejandra Rivas, David Karakan, M. Cagatay White, Alice E. Malikopoulos, Andreas A. Das, Sambeeta University of Delaware Department of Mechanical Engineering NewarkDE19716 United States University of Delaware Department of Animal and Food Sciences NewarkDE19716 United States Boston University Department of Biomedical Engineering BostonMA02215 United States Boston University Department of Mechanical Engineering Departments of Biomedical Engineering and Materials Science and Engineering BostonMA02215 United States

ISBN: (纸本)9798350330397

Microrobots, untethered miniature devices capable of performing tasks at the microscale, have gained significant attention in the fields of robotics and biomedicine. These devices hold immense potential for various industrial and scientific applications, including targeted drug delivery and cell manipulation. In this study, we present a novel magnetic rolling helical microrobot specifically designed for bio-compatible cell patterning. Our microrobot incorporates both open-loop and closed-loop control mechanisms, providing flexible, precise, and rapid control for various applications. Through experiments, we demonstrate the microrobot's ability to manipulate cells by pushing them while rolling and arranging cells into desired patterns. This result is particularly significant as it has implications for diverse biological applications such as tissue engineering and organoid development. Moreover, we showcase the effectiveness of our microrobot in a closed-loop control system, where it successfully follows a predetermined path from an origin to a destination. The combination of cellular manipulation capabilities and trajectory-tracking performance underlines the versatility and potential of our magnetic rolling helical microrobot. The ability to control and navigate the microrobot with high precision opens up new possibilities for advanced biomedical applications. These findings contribute to the growing body of knowledge in microbotics and pave the way for further research and development in the field. © 2023 IEEE.

关键词： Cells

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