Results 131 to 140 of about 21,815 (267)

Modelling electromagnetic radiation from digital electronic systems by means of the finite difference time domain method [PDF]

, 1992
Elder, KE, McGeehan, JP, Railton, CJ, Richardson, KM   +3 more
core   +2 more sources

RF‐Shielding of Laser‐Cut Venous Stents: Calculations, Simulations, and Experiments

Magnetic Resonance in Medicine, Volume 95, Issue 4, Page 2331-2344, April 2026.
ABSTRACT Purpose To develop an analytical model of the RF‐shielding of laser‐cut venous stents for different orientations and stent geometries. Methods Laser‐cut venous stents are modeled as a grid composed of circular and rectangular loops. As these loops are orthogonal they shield different components of the transmit RF field.
Lisa Regler, Felix Spreter, Kian Tadjalli Mehr, Niklas Verloh, Klaus Düring, Wibke Uller, Michael Bock, Simon Reiss   +7 more
wiley   +1 more source

Evaluating transient behaviour of large‐scale photovoltaic systems during lightning events using enhanced finite difference time domain method with variable cell size approach

High Voltage
Photovoltaic (PV) arrays are usually installed in open areas; hence, they are vulnerable to lightning strikes that can result in cell degradation, complete damage, service disruption, and increased maintenance costs.
Ibrahim Hetita, Diaa‐Eldin A. Mansour, Yang Han, Ping Yang, Congling Wang, Mohamed M. F. Darwish, Matti Lehtonen, Amr S. Zalhaf   +7 more
doaj   +1 more source

RBF-FDTD Analysis of Lightning-Induced Voltages on Multi-Conductor Distribution Lines

Energies
Lightning-induced voltages on overhead distribution lines present a formidable obstacle to ensuring the reliability of power systems, evaluated through conventional numerical techniques, such as the Finite Difference Time Domain (FDTD) method and the ...
Duc-Quang Vu, Nhat-Nam Nguyen, Phan-Tu Vu   +2 more
doaj   +1 more source

Velocity estimation in GPR data based on diffraction analysis: Methodology and application to Antarctic firn

Near Surface Geophysics, Volume 24, Issue 2, Page 170-186, April 2026.
Abstract This study presents a methodological framework for estimating electromagnetic wave velocities in ground‐penetrating radar (GPR) data based exclusively on the analysis of diffractions. The approach integrates diffraction separation using the plane wave destruction algorithm and subsequent velocity refinement through the residual diffraction ...
Ian E. Vogado, José Jadsom S. Figueiredo, Jandyr M. Travassos, Saulo S. Martins   +3 more
wiley   +1 more source

Atmospheric Dynamics of IR‐Active Particles Released From Mars' Surface

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Surface release of radiatively active particles, with high infrared‐ (IR‐)to‐visible extinction ratios, has been proposed as a method of warming Mars. However, to warm Mars using aerosols, particles released locally must disperse globally. Here we provide an initial reference study in a plume tracking, dry Martian atmospheric model to address ...
Mark I. Richardson, Samaneh Ansari, Bowen Fan, Ramses Ramirez, Hooman Mohseni, Michael A. Mischna, Michael H. Hecht, Liam J. Steele, Felix Sharipov, Edwin S. Kite   +9 more
wiley   +1 more source

Active Switching of Orbital Angular Momentum of Light Using Metasurfaces Incorporating Vanadium Dioxide

Nanophotonics, Volume 15, Issue 5, 16 March 2026.
This work presents a novel design strategy for active metasurfaces that actively switches OAM modes. The metasurface integrates VO2 within MIM meta‐atoms. Operating at 1500 nm, the designed platform enables large leaps in topological charge. For instance, the reflected beam can be switched from a topological charge of −1 in the insulating (M1) phase to
Qinghong Lyu, Qiuchen Yan, Yulan Fu, Xiaoyong Hu, Qihuang Gong   +4 more
wiley   +1 more source

Stable Model Reduction for Time‐Domain Room Acoustics: A Structure‐Preserving Formulation for Complex Boundaries

International Journal for Numerical Methods in Engineering, Volume 127, Issue 5, 15 March 2026.
ABSTRACT This work presents novel structure‐preserving formulations for stable model order reduction in the context of time‐domain room acoustics simulations. A solution to address the instability in conventional model order reduction formulations based on the Linearized Euler Equations is derived and validated through numerical experiments.
Satish Bonthu, Hermes Sampedro Llopis, Solvi Thrastarson, Finnur Pind, Runar Unnthorsson   +4 more
wiley   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, Volume 36, Issue 20, 9 March 2026.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

Double Helical Plasmonic Antennas

Advanced Functional Materials, Volume 36, Issue 20, 9 March 2026.
Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin, Luka Zurak, Krzysztof Maćkosz, Lorenz Löffler, Victor Deinhart, Ivo Utke, Thorsten Feichtner, Katja Höflich   +7 more
wiley   +1 more source