Results 21 to 30 of about 76,854 (243)
Inferring Drumhead Damping and Tuning from Sound Using Finite Difference Time Domain (FDTD) Models
Acoustics, 2023 Percussionists use a multitude of objects and materials, mounted on their instruments, to achieve a satisfying sound texture. This is a tedious process as there are no guidelines suggesting how to manipulate a percussion instrument to adjust its ...
Chrisoula Alexandraki +3 more
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Applied Sciences, 2021 Most simulations involving metamaterials often require complex physics to be solved through refined meshing grids. However, it can prove challenging to simulate the effect of local physical conditions created by said metamaterials into much wider ...
Eric Ballestero +6 more
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Quantum Electromagnetic Finite-Difference Time-Domain Solver [PDF]
Quantum Reports, 2020 We employ another approach to quantize electromagnetic fields in the coordinate space, instead of the mode (or Fourier) space, such that local features of photons can be efficiently, physically, and more intuitively described. To do this, coordinate-ladder operators are defined from mode-ladder operators via the unitary transformation of systems ...
Dong-Yeop Na, Weng Cho Chew
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Finite Difference Time-Domain Modelling of Metamaterials: GPU Implementation of Cylindrical Cloak
Advanced Electromagnetics, 2013 Finite difference time-domain (FDTD) technique can be used to model metamaterials by treating them as dispersive material. Drude or Lorentz model can be incorporated into the standard FDTD algorithm for modelling negative permittivity and permeability ...
A. Dawood
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Finite-Difference Time-Domain Simulations
, 2021 This work discusses the Finite-Difference Time-Domain (FDTD) technique to simulate an electromagnetic wave assuming one, two and three dimensions. The propagation medium is assumed to be a free space bounded by two absorbing boundaries, perfect matched layer (PML) and perfect electric conductor (PEC).
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Finite-difference time-domain modelling of photonic crystal structures [PDF]
Proceedings of 2001 3rd International Conference on Transparent Optical Networks (IEEE Cat. No.01EX488), 2002 The usual, highly efficient, modelling tools for planar optical devices are generally not suitable for modelling photonic crystal structures. For example, the beam propagation method fails when applied to these strongly scattering structures since presumptions are made on the propagation direction of the waves. The finite-difference time-domain method (
de Ridder, René M., Stoffer, Remco
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Subcell Treatment of Sloped Interfaces between Debye Materials in the FDTD Method
Journal of Amasya University the Institute of Sciences and Technology, 2020 This paper presents the application of the subcell technique for the treatment of sloped interface in finite-difference time-domain method. The technique is based on the averaging of permittivities in each cell crossed by the material interface.
Kenan Tekbas
doaj
FDTD Analysis of Electromagnetic Wave Propagation in an Inhomogeneous Ionosphere under Arbitrary-Direction Geomagnetic Field [PDF]
Journal of the Korean Institute of Electromagnetic Engineering and Science, 2018 The finite-difference time-domain (FDTD) model was developed to analyze electromagnetic (EM) wave propagation in an inhomogeneous ionosphere. The EM analysis of ionosphere is complicated, owing to various propagation environments that are significantly ...
Jun-Ho Kweon +3 more
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Finite-difference time-domain simulation of spacetime cloak
Optics Express, 2014 In this work, we present a numerical method that remedies the instabilities of the conventional FDTD approach for solving Maxwell's equations in a space-time dependent magneto-electric medium with direct application to the simulation of the recently proposed spacetime cloak.
Cornelius, Jason +2 more
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The newfound relationship between extrachromosomal DNAs and excised signal circles
FEBS Letters, EarlyView.Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley +1 more source