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2023 IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2023

作者： Tassi, Stavroula C. Polyzos, Konstantinos D. Fotiadis, Dimitrios I. Sakellarios, Antonis I. Department of Material Science and Engineering Ioannina Greece University of Patras Department of Mechanical and Aeronautics Engineering Patras Greece University of Minnesota Department of Electrical and Computer Engineering MN United States Biomedical Reasearch Institute Ioannina Greece University of Patras Laboratory of Biomechanics and Biomedical Engineering Department of Mechanical and Aeronautics Engineering Patras Greece Ioannina Greece

ISBN: (纸本)9798350337488

Cardiovascular disease (CVD) poses a significant global health challenge, and accurate inference methods are vital for early detection and intervention. However, the quality of prediction relies heavily on the availability of labeled data, which are often limited in medical applications. To cope with the challenge of limited labeled data, we are the first to propose an active learning (AL) approach that leverages a weighted ensemble of Gaussian processes to effectively infer CVD by strategically selecting the few most informative data points to label. Through experiments conducted on the SMARTool dataset, we demonstrate the effectiveness of the advocated approach, achieving superior performance in CVD inference compared to baseline methods. Our findings highlight the potential impact of the proposed AL framework in CVD diagnosis and treatment clinical cases, particularly in scenarios where labeled data are scarce, due to data confidentiality concerns or high sampling costs. © 2023 IEEE.

关键词： CVD inference Ensemble of Gaussian Processes (EGPs) FFR index Gaussian Processes (GPs)

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Efficient Recycling of Magnesium Alloys via Partial Distillation Using Gravity-Multiple Effect Thermal System (G-METS)

Efficient Recycling of Magnesium Alloys via Partial Distilla...

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Magnesium Technology Symposium, 2025, held as part of the TMS Annual Meeting and Exhibition, TMS 2025

作者： McArthur Sehar, Daniel Saito, Kenichi Telgerafchi, Armaghan Gallego, Maya Sridhar, Meera Iurkovskyi, Artem Powell, Adam Department of Materials Science and Engineering Program Worcester Polytechnic Institute 100 Institute Rd. WorcesterMA01609 United States Department of Mechanical Engineering Shibaura Institute of Technology Tokyo Japan Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States

ISBN: (纸本)9783031810602

MagnesiumMagnesium’s remarkable stiffnessStiffness-to-weight and high strengthStrength-to-weight ratios could enable substantial vehicle lightweighting versus aluminum and steel. However, primary production is very energy- and emissions-intensive, and recyclingRecycling cannot cost-effectively produce magnesiumMagnesium of sufficient purity for die casting and other structural applications. Distillation can produce high-purity magnesiumMagnesium but is capital- and energy-intensive. Gravity-Driven Multiple Effect Thermal System (G-METS) is a continuous low-pressure magnesiumMagnesium distillation process used in primary production or recyclingRecycling in which heat re-use leads to just 0.5–1 kWh energy consumption per kgMg Mg product—which is 80–90% less energy than current Mg distillation. This paper presents new partial distillation experiments showing 99.96% product purity. An industrial distiller design can help to estimate capital costs. New modeling work describes temperature and pressure change in the vapor conduit, energy use and losses in the industrial distiller, and effects of evaporator flow vanes on the separation of volatile elements such as zinc. © The Minerals, Metals & Materials Society 2025.

关键词： Magnesium alloys

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Project Edubot: Exploring Pedagogical Approaches in High School Robotics Education 16

Project Edubot: Exploring Pedagogical Approaches in High Sch...

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16th Brazilian Symposium on Robotics and 15th Workshop on Robotics in Education, SBR-WRE 2024

作者： Nunes Daltro, Isabela Silva Santos, João Victor de Sousa, Guilherme Barbosa Martins, Rodrigo Pastrana, M.A. de Souza Baptista, Roberto Mechatronics Engineering Undergraduate Program University of Brasilia DF Brasilia Brazil Department of Mechanical Engineering Mechatronics Graduate Program University of Brasilia DF Brasilia Brazil Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia DF Brasilia Brazil

ISBN: (纸本)9798350391084

This study focus on passive and active learning within the context of robotics education on public high schools. By synthesizing research findings and practical insights, this paper offers valuable recommendations for educators aiming to optimize the delivery of robotics education in public high schools, addressing the significance of the utilization of appropriate resources and technologies to support effective instruction. We implemented two distinct teaching methodologies to compare and study students’ reactions and learning outcomes: Group A experienced a passive methodology, while Group B engaged with an active methodology. We conducted a survey and the results show that the majority of the students prefer the active approach used in classes. ©2024 IEEE.

关键词： Contrastive Learning

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In-situ fabrication of manganese ferrite grafted polyaniline nanocomposite: A magnetically reusable visible light photocatalyst and a robust electrode material for supercapacitor

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Journal of Colloid and Interface Science 2023年 642卷 584-594页

作者： Somasundaram, Annette Jayam Xiao, Huifang Pandiyarajan, Sabarison Liao, Ai-Ho Lydia, Sharmila Chuang, Ho-Chiao Tamil Nadu Tiruchirappalli India School of Mechanical Engineering University of Science and Technology Beijing Beijing100083 China Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei106344 Taiwan Department of Mechanical Engineering National Taipei University of Technology Taipei106344 Taiwan Graduate Institute of Biomedical Engineering National Taiwan University of Science and Technology Taipei106335 Taiwan Department of Biomedical Engineering National Defense Medical Center Taipei114201 Taiwan

Herein, we reported the in-situ preparation of manganese ferrite (MnFe2O4) grafted polyaniline (Pani), a magnetic nanocomposite for the potential visible light photocatalytic material as well as electrode material for supercapacitor. The physical characterization of the prepared nanoparticle and nanocomposite was examined with various spectroscopic and microscopic analyses. The peaks observed in the X-ray diffraction study confirm the face-centered cubic phase of MnFe2O4 nanoparticles with a grain size of ∼17.6 nm. The surface morphology analysis revealed the uniform distribution of spherical-like MnFe2O4 nanoparticles on the surface of Pani. The degradation of malachite green (MG) dye under exposure to visible light was investigated using MnFe2O4/Pani nanocomposite as a photocatalyst. The results exposed the faster degradation of MG dye was accomplished by MnFe2O4/Pani nanocomposite than MnFe2O4 nanoparticles. The energy storage performance of the MnFe2O4/Pani nanocomposite was analyzed through cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy analyses. The results exposed that the MnFe2O4/Pani electrode achieved a capacitance of 287.1 F/g than the MnFe2O4 electrode (94.55 F/g). Further, the respectable capacitance of 96.92% was achieved even after 3000 repetitive cycles stability. Based on the outcomes, the MnFe2O4/Pani nanocomposite can be suggested as a promising material for both photocatalytic and supercapacitor applications. © 2023 Elsevier Inc.

关键词： Iron compounds

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Nanoscale Adhesion and Material Transfer at 2D MoS2-MoS2 Interfaces Elucidated by In Situ Transmission Electron Microscopy and Atomistic Simulations

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ACS Applied Materials and Interfaces 2024年第23期16卷 30506-30520页

作者： Toom, Sathwik Reddy Sato, Takaaki Milne, Zachary Bernal, Rodrigo A. Jeng, Yeau-Ren Muratore, Christopher Glavin, Nicholas R. Carpick, Robert W. Schall, J. David Department of Mechanical Engineering North Carolina A&T State University GreensboroNC27411 United States Department of Mechanical Engineering and Applied Mechanics University of Pennsylvania PhiladelphiaPA19104 United States Gatan Inc. PleasantonCA94588 United States Department of Mechanical Engineering University of Texas Dallas RichardsonTX75080 United States Department of Biomedical Engineering National Cheng Kung University in Tainan Tainan70101 Taiwan Department of Chemical and Materials Engineering University of Dayton DaytonOH45469 United States Materials and Manufacturing Directorate US Air Force Research Laboratory Wright-Patterson AFBOH45433 United States

Low-dimensional materials, such as MoS2, hold promise for use in a host of emerging applications, including flexible, wearable sensors due to their unique electrical, thermal, optical, mechanical, and tribological properties. The implementation of such devices requires an understanding of adhesive phenomena at the interfaces between these materials. Here, we describe combined nanoscale in situ transmission electron microscopy (TEM)/atomic force microscopy (AFM) experiments and simulations measuring the work of adhesion (Wadh) between self-mated contacts of ultrathin nominally amorphous and nanocrystalline MoS2 films deposited on Si scanning probe tips. A customized TEM/AFM nanoindenter permitted high-resolution imaging and force measurements in situ. The Wadh values for nanocrystalline and nominally amorphous MoS2 were 604 ± 323 mJ/m2 and 932 ± 647 mJ/m2, respectively, significantly higher than previously reported values for mechanically exfoliated MoS2 single crystals. Closely matched molecular dynamics (MD) simulations show that these high values can be explained by bonding between the opposing surfaces at defects such as grain boundaries. Simulations show that as grain size decreases, the number of bonds formed, the Wadh and its variability all increase, further supporting that interfacial covalent bond formation causes high adhesion. In some cases, sliding between delaminated MoS2 flakes during separation is observed, which further increases the Wadh and the range of adhesive interaction. These results indicate that for low adhesion, the MoS2 grains should be large relative to the contact area to limit the opportunity for bonding, whereas small grains may be beneficial, where high adhesion is needed to prevent device delamination in flexible systems. © 2024 American Chemical Society.

关键词： Molybdenum disulfide

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Bioprinting Methods for Fabricating In Vitro Tubular Blood Vessel Models

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Cyborg and Bionic Systems 2023年第1期4卷 178-195页

作者： Seon-Jin Kim Min-Gyun Kim Jangho Kim Jessie SJeon Jinsoo Park Hee-Gyeong Yi Department of Rural and Biosystems Engineering College of Agriculture and Life SciencesChonnam National UniversityGwangjuRepublic of Korea Department of Convergence Biosystems Engineering College of Agriculture and Life SciencesChonnam National UniversityGwangjuRepublic of Korea Interdisciplinary Program in IT-Bio Convergence System Chonnam National UniversityGwangju 61186Republic of Korea Department of Mechanical Engineering Korea Advanced Institute of Science and TechnologyDaejeonRepublic of Korea Department of Mechanical Engineering Chonnam National UniversityRepublic of Korea

Dysfunctional blood vessels are implicated in various diseases,including cardiovascular diseases,neurodegenerative diseases,and *** studies have attempted to prevent and treat vascular diseases and understand interactions between these diseases and blood vessels across different organs and *** studies were conducted using 2-dimensional(2D)in vitro and animal ***,these models have difficulties in mimicking the 3D microenvironment in human,simulating kinetics related to cell activities,and replicating human pathophysiology;in addition,3D models involve remarkably high ***,in vitro bioengineered models(BMs)have recently gained *** created through biofabrication based on tissue engineering and regenerative medicine are breakthrough models that can overcome limitations of 2D and animal *** can also simulate the natural microenvironment in a patient-and target-specific *** this review,we will introduce 3D bioprinting methods for fabricating bioengineered blood vessel models,which can serve as the basis for treating and preventing various vascular ***,we will describe possible advancements from tubular to vascular ***,we will discuss specific applications,limitations,and future perspectives of fabricated BMs.

关键词： Blood organs printing

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Compact Model Build Upon Dynamic Weighting Artificial Neural Network Approach for Complementary Field Effect Transistors

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IEEE Transactions on Electron Devices 2024年第1期71卷 246-253页

作者： Butola, Rajat Li, Yiming Kola, Sekhar Reddy National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Electrical Engineering and Computer Science International Graduate Program Hsinchu300093 Taiwan Institute of Pioneer Semiconductor Innovation The Institute of Artificial Intelligence Innovation National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Electrical Engineering and Computer Science International Graduate Program The Institute of Communications Engineering the Institute of Biomedical Engineering Department of Electronics and Electrical Engineering Hsinchu300093 Taiwan

In this work, a dynamic weighting-artificial neural network (DW-ANN) methodology is presented for quick and automated compact model (CM) generation. It takes advantage of both TCAD simulations for high accuracy and SPICE simulations for cost-effectiveness. This methodology is developed for gate-all-around (GAA) silicon (Si) nanosheet (NS) complementary field effect transistor (CFET), a potential candidate for future CMOS technology due to its innate properties. The critical process variation (PV) sources that severely degrade the CFET performance are estimated using DW-ANN. It reduces the computation cost and predicts the effects of PV sources with less than 1% error. Furthermore, a compact DW-ANN-based Verilog-A model has been developed that captures the dc as well as transient behavior accurately for circuit-level analysis. CFET-based circuits such as inverter, 6T-static random access memory (SRAM), and ring oscillator (RO) are characterized and implemented using DW-ANN-based CM. The overall average error of the model is reported as less than 2%. Therefore, the proposed device and circuit modeling approach provides a feasible solution for the rapid compact modeling of new emerging devices with good convergence and high accuracy. © 1963-2012 IEEE.

关键词： Neural networks

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The effect of grooves on the in-wheel motor cover of an electric scooter to increase the heat transfer process

The effect of grooves on the in-wheel motor cover of an elec...

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2023 International Conference on Computer Science, Information Technology and engineering, ICCoSITE 2023

作者： Albana, Muhammad Hasan Guntur, Harus Laksana Putra, Ary Bachtiar Khrisna Institut Teknologi Sepuluh Nopember Graduate Program of Mechanical Engineering Department Surabaya Indonesia Institut Teknologi Sepuluh Nopember Mechanical Engineering Department Surabaya Indonesia

ISBN: (纸本)9798350320954

Excessive heat will reduce the torque, power, and efficiency of the in-wheel motor, for example, the in-wheel motor used for an electric scooter. This study discusses an effort to reduce the temperature of the in-wheel motor of an electric scooter by making grooves on the cover surface. If the temperature of the in-wheel motor cover is low, it will reduce the temperature of the in-wheel motor as a whole. This research uses the finite element method: steady-state thermal analysis and transient thermal analysis. The software used is Ansys Workbench. Suppose a heat flux of 1000 W/m2 is inside the in- wheel motor, the metal used as a cover is aluminum, 22°C is the starting temperature, and the ambient temperature is 28°C. The results showed that the grooves on the in-wheel motor cover caused the temperature to be reduced by 8.4%, and the total heat flux increased by 8.3% compared to the standard in-wheel motor cover (cover without modifications). In this study, the transient thermal analysis described the heat transfer process better than a steady-state thermal analysis. © 2023 IEEE.

关键词： Finite element method

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The Effect of Fins Design on the Thermal Characteristics of Electric Motors for Electric Vehicles

The Effect of Fins Design on the Thermal Characteristics of ...

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2023 International Conference on Advanced Mechatronics, Intelligent Manufacture and Industrial Automation, ICAMIMIA 2023

作者： Albana, Muhammad Hasan Guntur, Harus Laksana Khrisna Putra, Ary Bachtiar Institut Teknologi Sepuluh Nopember Graduate Program of Mechanical Engineering Department Surabaya Indonesia Institut Teknologi Sepuluh Nopember Mechanical Engineering Department Surabaya Indonesia

ISBN: (纸本)9798350309225

The increasing public demand for electric vehicles also impacts the demand for electric motors. The prominent problem electric motors faces are excess heat when operating because it affects the age and performance of the electric motor. Installing fins on the electric motor housing is one way to reduce heat on the electric motor. In this study, a comparison of the six-fin design was carried out, and the effect on the thermal characteristics of the electric motor was examined. Fins are mounted radially and axially. The six types of fin designs studied are radial fins-round, radial fins-square, radial fins-servo, axial fins-round, axial fins-square, and axial fins-servo. The research uses the lumped circuit models method, and the software used is Motor-CAD. The type of electric motor being studied is a brushless permanent magnet machine (BPM) with an internal rotor. The study's findings indicate that the fin's performance in cooling the electric motor depends on its area. The lower temperatures in the axial fins-servo and radial fins-square compared to other fin designs are due to the broader area of the axial fins-servo and radial fins-square compared to the others. Axially mounted fins provide better cooling than radially mounted fins. For example, the winding temperature on the axial fins-servo is 140.54°C, and the winding temperature on the radial fins-square is 140.86°C even though the area of the axial fins-servo is 22.7% smaller than the area of the radial fins-servo. © 2023 IEEE.

关键词： Electric vehicles

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The Effect of Rotational Speed on the Thermal Characteristics of a Wheel Hub Motor on an Electric Scooter 24

The Effect of Rotational Speed on the Thermal Characteristic...

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24th International Seminar on Intelligent Technology and Its Applications, ISITIA 2023

ISBN: (纸本)9798350313956

When using an electric scooter, there is a problem with the electric motor overheating. Temperatures that are too high will damage motor performance and reduce reliability. As a result, heat transfer from electric motors needs to be carefully considered. This study aims to determine the thermal characteristics of an electric motor by varying the rotational speed. The rotational speeds varied were 250 rpm, 500 rpm, and 750 rpm. Using finite element analysis to answer research questions, the software used is Ansys Motor-CAD. The type of electric motor used is a wheel hub motor with a power of 1.5 kW. The findings indicate that the rotating speed influenced the thermal properties of a wheel hub motor. Wheel hub motor components, including the winding, stator, rotor, cover, and axle, exhibit a drop in temperature with increasing rotational speed. The winding is the component that experiences the highest temperature, and the cover is the component that experiences the lowest temperature. The winding loss value is much higher than the stator, magnet, and rotor loss. Compared to other rotational speeds, the winding temperature at 750 rpm rotational speed achieved a stable temperature the quickest, at 519 minutes, while the temperatures at 250 rpm and 500 rpm reached stable temperatures, respectively, at 592.2 and 550.5 minutes. © 2023 IEEE.

关键词： Finite element method

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