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A Novel Scheme for Data Security in UAV Communication Networks for Preventing Data Breach

IEEE Transactions on Consumer Electronics 2025年

作者： Zhang, Gaoyuan Si, Ruisong Ma, Congfang Ji, Baofeng Wang, Weiguang Mu, Yu Li, Yiwei Mumtaz, Shahid the School of Information Engineering Henan University of Science and Technology Luoyang471023 China the Science and Technology Innovation Center of Intelligent system Longmen Laboratory Luoyang471000 China the Institute of Physics Henan Academy of Sciences Zhengzhou451451 China the School of mechanical and electrical engineering Guangdong University of Science and Technology Dongguan523083 China the Department of Applied Informatics Silesian University of Technology Akademicka 16 Gliwice44-100 Poland the Department of Engineering Nottingham Trent University United Kingdom

The data security is crucial for unmanned aerial vehicles (UAVs) to ensure the integrity of data, prevent fraud, and authentication process. In order to achieve unconditional security for data in UAVs communication networks, this research study proposes a simple feedback method for wiretap channel-I (WTC-I) to establish a communication with the receiving link. The threshold effect (decides the error correction capability of the system) in the proposed research uses soft-decision decoding for low-density parity-check (LDPC) codes for secured communication channels over additive white Gaussian noise (BI-AWGN) channel as well as Binary Symmetric Channel (BSC). There is no channel state information (CSI) required for the legitimate receiver to build the WTC-I which eventually minimizes the implementation complexity. The empirical results and theory analysis indicate that the suggested approach is robust and has the characteristics of simple implementation with low energy consumption. The results also show minimal loss of safe capacity, which is crucial for secured transmissions in battery-operated UAV communication networks. The proposed study helps to achieve secured transmission of data without affecting the performance of the system with optimal consumption of power and lower maintenance complexity. © 2025 IEEE. All rights reserved,

关键词： Gaussian noise (electronic)

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Boosting the Alkaline Hydrogen Evolution Reaction of Ni/Co9s8@Fp Heterostructures Via Interfacial Synergistic Effects

SSRN

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SSRN 2023年

作者： Deng, Shuwei Feng, Jinxian Kong, Youchao Li, Xiaoshuang Puente Santiago, Alain R. He, Tianwei School of Applied Physics and Materials Wuyi University Guangdong Jiangmen529020 China Institute of Applied Physics and Materials Engineering University of Macau China Department of Physics and Electronic Engineering Yancheng Teachers University Yancheng224002 China Walker Department of Mechanical Engineering University of Texas at Austin AustinTX78712 United States Yunnan Key Laboratory for Micro/Nano Materials & Technology National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University Kunming650091 China

The generation of hydrogen from electrolysis is placed among the most clean and sustainable renewable energy technologies. Design and synthesis of efficient and robust noble-metal-free electrocatalyst for hydrogen evolution reaction (HER) are of paramount importance in modern society. Herein, we developed a simple two-step strategy to construct a new Ni/Co9S8 heterostructure as a precious metal-free electrocatalyst for hydrogen evolution reaction (HER) in alkaline media. The optimized electrocatalyst can achieve an ultralow overpotentials of 76 mV for HER at 10 mA cm-2 in 1.0 M KOH. Moreover, it can be maintained a current density of 100 mA cm-2 at 380 mV (vs. RHE) for 37 h. More importantly, experimental and theoretical calculations revealed that the remarkable enhancement of HER activity is attributed to the synergistic effect of Ni and Co9S8, which lead to the moderate hydrogen adsorption on Ni surface and improve the water dissociation at the interface of Ni/Co9S8. Our work paves a new pathway to design high-efficient electrocatalysts for massive hydrogen production. © 2023, The Authors. All rights reserved.

关键词： Precious metals

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Visualizing Field-free Deterministic Magnetic Switching of all–van der Waals Spin-Orbit Torque System Using Spin Ensembles in Hexagonal Boron Nitride

arXiv

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arXiv 2025年

作者： Zhang, Xi Zhou, Jingcheng Hu, Chaowei Deng, Kuangyin Wang, Chuangtang Agarwal, Nishkarsh Jin, Hanshang Al-Matouq, Faris A. Xu, Stelo Trivedi, Roshan S. Li, Senlei Rathi, Sumedh Lu, Hanyi Jiang, Zhigang Taufour, Valentin Hovden, Robert Zhao, Liuyan Cheng, Ran Xu, Xiaodong Chu, Jiun-Haw Du, Chunhui Rita Wang, Hailong School of Physics Georgia Institute of Technology AtlantaGA30332 United States Department of Physics University of Washington SeattleWA98105 United States Department of Electrical and Computer Engineering University of California RiversideCA92521 United States Department of Physics University of Michigan Ann ArborMI48109 United States Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Department of Physics and Astronomy University of California DavisCA95616 United States Department of Physics University of California San Diego La Jolla CA92093 United States Applied Physics Program University of Michigan Ann ArborMI48109 United States Department of Physics and Astronomy University of California RiversideCA92521 United States Department of Materials Science and Engineering University of Washington SeattleWA98105 United States

Recently, optically active spin defects embedded in van der Waals (vdW) crystals have emerged as a transformative quantum sensing platform to explore cutting-edge materials science and quantum physics. Taking advantage of excellent solid-state integrability, this new class of spin defects can be arranged in controllable nanoscale proximity of target materials in vdW heterostructures, showing great promise for improving spatial resolution and field sensitivity of current sensing technologies. Building on this state-of-the-art measurement platform, here we report hexagonal boron nitride-based quantum imaging of field-free deterministic magnetic switching of room-temperature two-dimensional magnet Fe3GaTe2 in an all-vdW spin-orbit torque (SOT) system. By visualizing SOT-driven variations of nanoscale Fe3GaTe2 magnetic stray field profile under different conditions, we have revealed how the observed magnetic switching evolves from deterministic to indeterministic behavior due to the interplay between out-of-plane spins, in-plane spins and Joule heating. This understanding, which is otherwise difficult to access by conventional transport measurements, offers valuable insights on material design, testing, and evaluation of next-generation vdW spintronic devices. Copyright © 2025, The Authors. All rights reserved.

关键词： Van der Waals forces

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Non-Hermitian metasurface with non-trivial topology

Non-Hermitian metasurface with non-trivial topology

引用

CLEO: QELS_Fundamental Science, QELS 2022

作者： Prasad, Ciril S. Yang, Frank Li, Weijian Lach, Rosemary Everitt, Henry O. Naik, Gururaj V. Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States U.S. Army DEVCOM Army Research Laboratory-South HoustonTX United States

The synergy between topology and non-Hermiticity in photonics holds potential for optical devices that are robust against defects. We demonstrate a non-Hermitian plasmonic-dielectric metasurface in the visible with no... 详细信息

ISBN: (纸本)9781557528209

关键词： Topology

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Glass-forming ability of binary Lennard-Jones systems

引用

Physical Review Materials 2022年第7期6卷 075601-075601页

作者： Yuan-Chao Hu Weiwei Jin Jan Schroers Mark D. Shattuck Corey S. O'Hern Department of Mechanical Engineering & Materials Science Yale University New Haven Connecticut 06520 USA Benjamin Levich Institute and Physics Department The City College of New York New York New York 10031 USA Department of Physics Yale University New Haven Connecticut 06520 USA Department of Applied Physics Yale University New Haven Connecticut 06520 USA

The glass-forming ability (GFA) of alloys, colloidal dispersions, and other particulate materials, as measured by the critical cooling rate Rc, can span more than ten orders of magnitude. Even after numerous previous studies, the physical features that control the GFA are still not well understood. For example, it is well known that mixtures are better glass formers than monodisperse systems and that particle size and cohesive energy differences among constituents improve the GFA, but it is not currently known how particle size differences couple to cohesive energy differences to determine the GFA. We perform molecular dynamics simulations to determine the GFA of equimolar, binary Lennard-Jones (LJ) mixtures versus the normalized cohesive energy difference ε_ and mixing energy ε¯AB between particles A and B. We find several important results. First, the log10Rc contours in the ε¯AB−ε_ plane are ellipsoidal for all diameter ratios, and thus Rc is determined by the Mahalanobis distance dM from a given point in the ε¯AB−ε_ plane to the center of the ellipsoidal contours. Second, LJ systems for which the larger particles have larger cohesive energy are generally better glass formers than those for which the larger particles have smaller cohesive energy. Third, dM(ε_,ε¯AB) is determined by the relative Voronoi volume difference between particles and local chemical order SAB, which gives the average fraction of nearest-neighbor B particles surrounding an A particle and vice versa. In particular, the shifted Mahalanobis distance dM−dM0 versus the shifted chemical order SAB−SAB0 collapses onto a hyperbolic master curve for all diameter ratios. These results identify design guidelines for improving the GFA of binary mixtures containing particles with different sizes, cohesive, and mixing energies.

关键词： Amorphous materials Molecular dynamics

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In-Situ Observations of Crack Propagation and Microstructure Evolution in a SAC305/ Cu Solder Joint Using High-Voltage Electron Microscopy

In-Situ Observations of Crack Propagation and Microstructure...

引用

International Conference on Electronics Packaging (ICEP)

作者： Kazuhiro Nogita Xin F. Tan Jiye Zhou Stuart D. McDonald Keith Sweatman Flora Somidin Hiroshi Maeno Kazuhiro Yasuda School of Mechanical and Mining Engineering The University of Queensland QLD Australia Nihon Superior Co. Ltd. Osaka Japan Geopolymer and Green Technology Centre of Excellence (CEGeoGTech) Universiti Malaysia Perlis (UniMAP) Perlis Malaysia Department of Applied Quantum Physics and Nuclear Engineering The Ultramicroscopy Research Center Kyushu University Fukuoka Japan

ISBN: (数字)9784991191190

ISBN: (纸本)9798331514747

To ensure reliable device manufacture and operation, it is essential to understand the mechanisms of solder joint crack formation and the recrystallisation behavior of solder joint intermetallics and alloys. However, due to difficulties in observing real-time atomistic scale analysis, we still do not fully understand that mechanisms of failure. Here, we developed an innovative in-situ method using high-voltage electron microscopy for observation of microstructural features of a solder joint during deformation. This technique was used to observe events including dislocation formation, recrystallisation, grain rotation and crack formation in a SAC305 alloy soldered on a copper substrate.

关键词： Deformation Transmission electron microscopy High-voltage techniques Microstructure Reliability Soldering Substrates Electrons Testing Electronics packaging

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Modal Analysis of the Wake Shed Behind a Horizontal Axis Wind Turbine with Flexible Blades

arXiv

引用

arXiv 2023年

作者： Salavatidezfouli, Sajad Sheidani, Armin Bakhshaei, Kabir Safari, Ali Hajisharifi, Arash Stabile, Giovanni Rozza, Gianluigi Trieste Italy Department of Applied Physics Eindhoven University of Technology Netherlands Department of Mechanical Engineering The Hong Kong University of Science and Technology Hong Kong Department of Pure and Applied Sciences Informatics and Mathematics Section University of Urbino Carlo Bo Urbino Italy The Biorobotics Institute Sant’Anna School of Advacended Studies Pisa Italy

The proper orthogonal decomposition has been applied on a full-scale horizontal-axis wind turbine to shed light on the wake characteristics behind the wind turbine. In reality, the blade tip experiences high deflections even at the rated conditions which definitely alter the wake flow field, and in the case of a wind farm, may complicate the inlet conditions of the downstream wind turbine. The turbine under consideration is the full-scale model of the National Renewable Energy Laboratory 5MW onshore wind turbine which is accompanied by several simulation complexities including turbulence, mesh motion and fluid-structure interaction. Results indicated an almost similar modal behaviour for the rigid and flexible turbines at the wake region. In addition, more flow structures in terms of local vortices and fluctuating velocity fields take place at the far wake region. The flow structures due to the wake shed from the tower tend to move towards the center and merge with that of the nacelle leading to an integral vortical structure 2.5 diameter away from the rotor. Also, it is concluded that the exclusion of the tower leads to missing a major part of the wake structures, especially at far-wake positions. © 2023, CC BY.

关键词： Wakes

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Guest Editorial: Introducing the Special Section on Thermophotovoltaic Systems

引用

Journal of Photonics for Energy 2024年第4期14卷

作者： Bermel, Peter Papadakis, Georgia T. Tervo, Eric Estrada, Esther López Kayes, Brendan Purdue University Purdue Quantum Science and Engineering Institute Department of Electrical and Computer Engineering West LafayetteIN United States ICFO-The Institute of Photonic Sciences Barcelona Spain University of Wisconsin-Madison College of Engineering Department of Electrical and Computer Engineering and of Mechanical Engineering MadisonWI United States University of Wisconsin-Madison Wisconsin Energy Institute MadisonWI United States Universidad Politécnica de Madrid-Instituto de Energía Solar Department of Physical Electronics Electrical Engineering and Applied Physics Madrid Spain Antora Energy SunnyvaleCA United States

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Mixing in chaotic flows with swimming bacteria

arXiv

引用

arXiv 2022年

作者： Ran, Ranjiangshang Brosseau, Quentin Blackwell, Brendan C. Qin, Boyang Winter, Rebecca L. Arratia, Paulo E. Department of Mechanical Engineering and Applied Mechanics University of Pennsylvania PhiladelphiaPA19104 United States Department of Physics and Astronomy Northwestern University EvanstonIL60208 United States Department of Mechanical and Aerospace Engineering Princeton University PrincetonNJ08544 United States

This is a manuscript accepted for publication on Physical Review Fluids, Gallery of Fluid Motion special issue. The manuscript is associated with a poster winner of the 39th Annual Gallery of Fluid Motion Award, for work presented at the 74th Annual Meeting of the American Physical Society’s Division of Fluid Dynamics (Phoenix, AZ, USA 2021). © 2022, CC BY.

关键词：

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Quantitative Gas Spectroscopy in the 220 to 330 GHz Frequency Band Utilizing a Microelectronic Spectrometer

Quantitative Gas Spectroscopy in the 220 to 330 GHz Frequenc...

引用

International Conference on Infrared and Millimeter Waves

作者： Ingrid Wilke Timothy E. Rice M. Waleed Mansha M. A. Z. Chowdhury Mona M. Hella Matthew A. Oehlschlaeger Department of Physics Applied Physics & Astronomy Rensselaer Polytechnic Institute Troy NY USA Department of Mechanical & Aeronautical Engineering Rensselaer Polytechnic Institute Troy NY USA Department of Electrical & Computer System Engineering Rensselaer Polytechnic Institute Troy NY USA

ISBN: (数字)9781728194271

ISBN: (纸本)9781728194288

The development of electronic THz wave rotational absorption spectroscopy for quantitative gas sensing and its experimental validation is reported. The implementation of a THz wave spectrometer operating in the 220 to 330 GHz frequency band using state-of-the-art electronic THz wave radiation sources and detectors is described. The novel system technology for THz wave gas phase spectroscopy is validated by the detection of a broad range of relevant volatile organic compounds, nitrogen compounds, halogenated hydrocarbons, and commercial refrigerants. The sensitivity of the spectrometer meets gas species detection limits set by, e.g. occupational health and safety standards. The large bandwidth (220 to 330 GHz), high frequency resolution (0.5 MHz), and rapid frequency scanning (160 GHz/s) of the spectrometer enables the important analysis of gas mixtures.

关键词： Volatile organic compounds Spectroscopy Sensitivity Nitrogen compounds Hydrocarbons Occupational health Sensors

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