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8th International Symposium on Modelling and Implementation of Complex Systems, MISC 2024

作者： Guerroudji, Mohamed Amine Benbelkacem, Samir Boudine, Leila Amara, Kahina Taright, Samya Toubaline, Nesrine Issolah, Imene Gacem, Rayane Zenati, Nadia Touia, Fatima-Zohra Masmoudi, Mostefa Benkacimi, Ali Center for Development of Advanced Technologies Baba Hassen Algiers Algeria Faculty of Medicine Benyoucef Benkhedda University of Algiers 1 Algiers Algeria CHU Mustapha Bacha Algiers Algeria LRDSI Laboratory Computer Science Department Saad Dahlab University - Blida 1 Blida Algeria

ISBN: (纸本)9783031821110

The field of augmented reality (AR) is currently booming, encompassing various areas including medicine and diagnostic assistance. AR allows the development of three-dimensional virtual environments for human interaction. This work aims to design and implement an AR-based system to well support medical undergraduate students in learning and training skeleton human anatomy, conforming to Algeria’s medical school requirements. Students, through their mobile devices, can experience various parts of the human anatomy, like the clavicle and scapula, in a realistic and engaging way by superimposing 3D anatomical models on the skeleton. With the help of our suggested system, undergraduate students at Algerian medical faculties will be able to manipulate virtual anatomical models, zoom, rotate, and examine them from various angles without having to directly access cadavers or traditional learning resources which are frequently unavailable due to the large number of undergraduate students which in some faculties exceeds a thousand students. Tests and evaluations were conducted to measure the effectiveness and usefulness of our AR learning system on mobile devices. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Students

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Jamming Tolerant Redundant Electro-Mechanical Actuator with Tandem Ball Screws

Jamming Tolerant Redundant Electro-Mechanical Actuator with ...

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AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Yamamoto, Yasuhiko Muraoka, Mikio Oyori, Hitoshi Advanced functional element development section Akita industrial technology center Akita Akita-shi010-1623 Japan Engineering Science Akita University Akita Akita-shi010-8502 Japan Strategic Technologies Div IHI corporation Koto-ku Tokyo135-8710 Japan

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

The reason why Electro-Mechanical Actuator (EMA) implementation is not progressing in aircraft is the existence of jamming failures. To deal with jamming failures, various redundancy methods have been studied. However, they have issues with complicated structures and control methods. In this study, we propose a new redundancy method that can tolerate ball-screw jamming with a simple configuration, called tandem ball-screw method. The safety-critical-system using the proposed method keeps functionality even if a control force is lost or a ball-screw jams. We show that the fully redundant system meets fault tolerance required aircraft. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Ball screws

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Probability maximization of magnetization switching by spin-orbit torques generated by a ferromagnet

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Physical Review B 2025年第9期111卷 094420-094420页

作者： Tomohiro Taniguchi Shinji Isogami Shuji Okame Katsuyuki Nakada Tomoyuki Sasaki Seiji Mitani Masamitsu Hayashi National Institute of Advanced Industrial Science and Technology (AIST) Research Center for Emerging Computing Technologies Tsukuba Ibaraki 305-8568 Japan National Institute for Materials Science Tsukuba 305-0047 Japan Advanced Products Development Center Technology & Intellectual Property HQ TDK Corporation Ichikawa Chiba 272-8558 Japan Department of Physics The University of Tokyo Tokyo 113-8654 Japan

Spin-orbit torques (SOTs) caused by spin currents generated in a ferromagnetic electrode enable a fast and deterministic magnetization switching. One SOT (y-SOT), polarized orthogonal to both electric current flowing in the electrode and easy axis of a ferromagnetic free layer, causes fast magnetization instability. The other SOT (z-SOT) points to the easy-axis direction and leads to the deterministic switching. Here, we evaluate the magnetization switching probability by these SOTs for various values of electric current density and the ratio of two SOTs from numerical simulation of the Landau-Lifshitz-Gilbert (LLG) equation. It is found that the switching probability is maximized when the electric current density is close to a critical value for the magnetization destabilization solely by the y-SOT. The origin of such a current dependence is investigated by analyzing temporal dynamics, spectra of the magnetization distribution, and a steady-state solution of the LLG equation. We reveal that the maximization of the switching probability originates due to two different switching behaviors. In the low current region, the magnetization in some trials remains near the initial state because of the weak y-SOT, and thus, the switching error occurs. The number of such trials, which represents the switching error, decreases as the electric current density increases because both y and z-SOTs prompt the switching. In the large current region, the large y-SOT immediately tilts the magnetization toward the switched direction. However, since the y-SOT prefers an in-plane magnetized state, the switching error due to a probabilistic return to the initial state after turning off the electric current density occurs. The switching error in this region tends to increase with increasing current density. As a result, the switching probability is optimized when the electric current density is close to the critical value.

关键词： Ferromagnetism

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Electrified Solutions as Required by a Specific Strategic Research Agenda for Mitigating the Environmental Impact of Future Aircraft

Electrified Solutions as Required by a Specific Strategic Re...

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AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Oyori, Hitoshi Hirakawa, Karin Chiaki, Kaori Yamamoto, Yasuhiko Muraoka, Mikio Strategic Technologies Div IHI corporation Koto-ku Tokyo135-8710 Japan Control Systems Engineering Dept IHI corporation Koto-ku Tokyo135-8710 Japan Advanced functional element development section Akita industrial technology center Akita-shi Akita010-1623 Japan Engineering Science Akita University Akita-shi Akita010-8502 Japan

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

Progress is being made in the technological development of Electrified Solutions (EleX) to improve fuel efficiency and the application of hydrogen in the next generation of passenger aircraft in the 2030s. This paper discusses the feasibility of EleX, which has not yet been achieved and the challenges of electrification as a life cycle beyond decarbonization, as well as future electrification technology strategies for the 2040s and beyond. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Aircraft fuels

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Relativistic electromagnetic solitons in magnetized laser-plasma interactions: A theoretical and parametric study

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European Journal of Mechanics, B/Fluids 2025年 113卷

作者： Bouziane, H. Annou, K. Quantum Electronics Laboratory Faculty of Physics U.S.T.H.B. BP 32 El-Alia Bab-Ezzouar Algiers16111 Algeria Center for the Development of Advanced Technologies CDTA BP 17 Baba Hassen Algiers16081 Algeria

Electromagnetic solitons created during the interaction of linearly polarized intense laser pulse with a magnetized plasma are investigated. To model the coupled laser-plasma system, fully relativistic hydrodynamic equations are used combined with Maxwell equations. The nonlinear Schrödinger equation is then acquired reflecting the formation of bright or dark solitons depending on the carrier wave frequency, in addition to the expression of the growth rate for modulational instabilities. To add a practical aspect to our study, a parametric analysis was conducted using values that are typical in intense laser-plasma interaction experiments. Our results closely matched the experimental observations, which contributes to the validation of our work. © 2025 Elsevier Masson SAS

关键词： Schrodinger equation

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Multichannel Electrochemical Cell and Liquid-Handling Dispenser for High-Throughput Combinatorial Screening of Multicomponent Electrolytes for advanced Lithium-Ion Batteries

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Batteries and Supercaps 2025年

作者： Matsuda, Shoichi Takahashi, Misato Center for Green Research on Energy and Environmental Materials National Institute for Material Science 1-1 Namiki Ibaraki Tsukuba305-0044 Japan Center for Advanced Battery Collaboration National Institute for Material Science 1-1 Namiki Ibaraki Tsukuba305-0044 Japan NIMS-SoftBank Advanced Technologies Development Center National Institute for Material Science 1-1 Namiki Ibaraki Tsukuba305-0044 Japan

The performance requirements of Li-ion batteries as energy storage devices are continuously increasing. To meet these demands, optimizing the electrolyte composition, especially for expanding the operating temperature range of LiBs, remains a critical challenge. High-throughput experimentation represents an effective approach for accelerating the discovery of multicomponent electrolytes. However, most high-throughput experiment studies on battery electrolytes are focused on evaluating the battery performance at room temperature owing to the challenges of integrating temperature control systems. To address this limitation, this study introduces a high-throughput experimental setup composed of a (i) closed-type 36-well multichannel electrochemical cell module, (ii) noncontact liquid-handling dispenser, and (iii) multielectrochemical analyzer installed within a temperature-controlled chamber. This setup enables the preparation of multicomponent electrolyte additives in a combinatorial manner and the evaluation of battery performance with the prepared electrolytes across a wide temperature range, achieving a throughput of over 400 samples per week. © 2025 The Author(s). Batteries & Supercaps published by Wiley-VCH GmbH.

关键词： Dispensers

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Surface acoustic wave characteristics in ZnO thin films deposited on different Silicon-based multilayered substrates

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Applied Physics A: Materials Science and Processing 2025年第6期131卷 1-11页

作者： Laidoudi, F. Caliendo, C. Kanouni, F. Amara, S. Research Center in Industrial Technologies CRTI P.O. Box 64 Cheraga Algiers16014 Algeria Via del Fosso del Cavaliere 100 Rome00133 Italy Research Unit in Optics and Photonics Center for Development of Advanced Technologies P.O. Box 17 Baba Hassen Algiers16303 Algeria El-Alia Po. Box 32 Bab-Ezzouar Algiers16111 Algeria

This paper investigates the characteristics of surface acoustic waves (SAWs) in piezoelectric ZnO thin films deposited on various bilayer substrates composed of silicon-derived materials. Finite element analysis is used to study the phase velocities and electromechanical coupling factors K2 of the first two fundamental SAW modes, propagating in multilayered ZnO/Si, ZnO/SiC/Si, ZnO/SiO2/Si, and ZnO/SiN/Si structures. ZnO thin films are grown on these substrates and subsequently characterized using atomic force microscopy (AFM) and X-ray diffraction (XRD) to assess film quality. Among the studied configurations, ZnO/SiO2/Si demonstrates the best performance, exhibiting well-defined SAW modes, superior crystallinity and enhanced K2. ZnO/SiO2/Si SAW delay line is then fabricated using conventional photolithography and electrically characterized by network analyzer. The response of the device confirms the presence of both Rayleigh and Sezawa modes, aligning with numerical predictions. The findings of this study contribute to the development of high-performance SAW sensors and resonators compatible with silicon and silicon-based technologies. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Thin films

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Design and Fabrication of Polymer Rubber-CNTs-Based Displacement Sensors Using Vibration Technique

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Semiconductors 2025年第5期59卷 488-494页

作者： Chani, Muhammad Tariq Saeed Karimov, Khasan S. Alzahrani, Khalid Ahmed Marwani, Hadi M. Center of Excellence for Advanced Materials Research King Abdulaziz University Jeddah 21589 Saudi Arabia Ghulam Ishaq Khan Institute of Engineering Sciences and Technology Topi 23640 Pakistan Center for Innovative Development of Science and Technologies of Academy of Sciences Dushanbe 734025 Tajikistan Chemistry Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia

Abstract: In this paper we described the fabrication of polymer rubber – carbon nanotubes (CNTs) – based displacement sensors using vibration deposition technique. The CNT films deposited by this technique were mechanically strong. It was found that under the effect of displacement up to 0.15 mm the resistance and the impedance of the sensors decreased by 4.3 times and 3.2 times, respectively. While under the same displacement the capacitance increased up to 3.08 times at 100 kHz and 1.85 times at 200 kHz. The fabricated sensors were shockproof. The introduced fabrication technology was simple for control and easy for realization. Similarly, the used materials were cost-effective and ecologically friendly. The fabricated devices are related to the “elastic electronics”. The vibration technology introduced in this work may be used for the fabrication of electronic devices at lab (research and teaching purposes) and commercial scales as well. © Pleiades Publishing, Ltd. 2025.

关键词： capacitance compressive displacement impedance shockproof vibration deposition

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Submicron-scale craters on Chang'e-5 lunar soils: records of complex space weathering processes

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Geochimica et Cosmochimica Acta 2025年 398卷 139-151.0页

作者： Gu, Lixin Lin, Yangting Chen, Yongjin Xu, Yuchen Tang, Xu Li, Jinhua Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Institutional Center for Shared Technologies and Facilities Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China College of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing 100049 China Center for High Pressure Science and Technology Advanced Research Beijing 100094 China State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Deep Petroleum Intelligent Exploration and Development Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Hyper-velocity impacts are dominant agents in the physical and chemical alteration of lunar surface materials. Natural small-scale craters on lunar soils provide an opportunity to understand the impact process and specific space weathering effects on minerals, however, they have not been systematically studied. Here, we report the morphology and microstructure of submicron-scale craters on Chang'e-5 lunar soils. Craters are found only on a few soil grains. Most identified craters exhibit large diameter-to-depth (D/d) ratios (>3) or are spatially clustered, indicating that they are formed by secondary ejecta rather than primary micrometeoroid impacts. advanced electron microscopy investigations revealed that the microstructures of these craters are complex. Craters on the surfaces of two pyroxenes and one olivine have continuous nanophase iron (npFe⁰)-bearing rims that extend over the crater and beyond over the crystal substrate, even when covered by an impact-produced redeposition layer. These features provide reliable evidence of solar wind exposure prior to the impact events that formed the craters. The possibility cannot be ruled out that the npFe⁰ particles present in these craters were previously produced by solar wind irradiation and not by impact. However, no clear signs are observed to establish the chronological order of formation of npFe⁰ particles in other craters studied. Furthermore, a crater on ilmenite has a minimum D/d value of 2.6, suggesting that this crater is likely formed by a primary micrometeoroid impact. Some unusual euhedral and elongated npFe⁰ particles observed on the crater floor may also have been produced earlier by solar wind irradiation and retained in the crater during subsequent impact. Shock melting and vapor deposition may also contribute to npFe⁰ formation by reduction during impact. Our findings imply that secondary impacts can also have a high velocity (1–2.38 km/s lunar es

关键词： Chang'e-5 lunar soils Hyper-velocity impact Metallic iron Space weathering Submicron-scale craters

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Real-time embedded ECG anomaly detection system with comparative analysis of CWT-based transfer learning performance across electrode types

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Biomedical Signal Processing and Control 2025年 109卷

作者： Kharzi, Wissem Meziane, Nacera Zairi, Hadjer Talha, Malika Kedir Madaoui, Lotfi Kerdjidj, Oussama Department of Electrical Engineering LINS Laboratory University of Science and Technologies Houari Boumediene Algiers BabEzzouar16111 Algeria Center for Development of Advanced Technologies Algiers Algeria

Electrocardiogram (ECG) is an essential tool to diagnose cardiac anomalies. However, the inherent variability of ECG signals contaminated by the presence of noise and artifacts during extended monitoring may lead to misdiagnoses. Consequently, conventional gel electrodes worsen the issue by causing skin irritation and degrading signal quality due to intermittent contact loss. This study introduces a real-time dry electrodes based ECG diagnostic assistance system to improve patient comfort and maintain signal quality. It integrates transfer learning models with continuous wavelet transform (CWT) techniques to build a robust recognition model to extracts more detailed information than traditional time domain representations. This investigation provides a comprehensive benchmarking analysis, assessing various CWT wavelets and their impact on the performance of deep learning architectures, including InceptionV3, VGG16, VGG19, Xception, and EfficientNetB0. Two datasets support the analysis: the publicly available PTB Diagnostic ECG dataset, which includes normal and pathological classes, and a proprietary dataset designed to detect hardware anomalies. Finally, the findings show that the VGG19 model achieved an accuracy of 99.87% when deployed on a Jetson Nano board, demonstrating effective training and validation processes while minimizing latency and computational overhead. © 2025 Elsevier Ltd

关键词： Electrocardiography

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