Search Results - "Tsitsas, Nikolaos L."

An Auxiliary-Current Vector Norm Method for Computing the Cutoff Wavenumbers of Anisotropic Waveguides by Kouroublakis, Minas, Zouros, Grigorios P., Tsitsas, Nikolaos L.

“…In this work, the auxiliary-current vector norm (ACVN)-based method of auxiliary sources (MAS) is extended and employed for the computation of the cutoff…”
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A Brain Storm and Chaotic Accelerated Particle Swarm Optimization Hybridization by Michaloglou, Alkmini, Tsitsas, Nikolaos L.

“…Brain storm optimization (BSO) and particle swarm optimization (PSO) are two popular nature-inspired optimization algorithms, with BSO being the more recently…”
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Analytical Methods in Wave Scattering and Diffraction Volume I by Tsitsas, Nikolaos L.

“…Boundary value problems (BVPs) pertaining to scattering and radiation by devices that support novel wave phenomena are of primary importance in applied and…”
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Formulation of a T-Matrix Approach for a Piecewise-Homogeneous Anisotropic Medium Excited by a Spherical Sound Wave by Kalogeropoulos, Andreas, Tsitsas, Nikolaos L.

“…A piecewise-homogeneous medium, consisting of anisotropic layers, is excited by a primary spherical sound wave due to a point source lying in the exterior of…”
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Feasible Optimal Solutions of Electromagnetic Cloaking Problems by Chaotic Accelerated Particle Swarm Optimization by Michaloglou, Alkmini, Tsitsas, Nikolaos L.

“…The optimization problem of cloaking a perfectly electric conducting or dielectric spherical core is investigated. The primary excitation is due to an external…”
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Detecting Line Sources inside Cylinders by Analytical Algorithms by Lazaridis, Dimitrios S., Tsitsas, Nikolaos L.

“…Inverse problems for line sources radiating inside a homogeneous magneto-dielectric cylinder are investigated. The developed algorithms concern the…”
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Analysis of Electromagnetic Scattering from Large Arrays of Cylinders via a Hybrid of the Method of Auxiliary Sources (MAS) with the Fast Multipole Method (FMM) by Mastorakis, Eleftherios, Papakanellos, Panagiotis J., Anastassiu, Hristos T., Tsitsas, Nikolaos L.

“…The Method of Auxiliary Sources (MAS) is an established technique for the numerical solution of electromagnetic (EM) scattering and radiation problems. This…”
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Efficient integral equation modeling of scattering by a gradient dielectric metasurface by Tsitsas, Nikolaos L.

“…Plane-wave scattering by a gradient dielectric metasurface, composed of a dielectric slab on which has been etched an infinitely periodic grating, is analyzed…”
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Mode Analysis by the Method of Auxiliary Sources With an Excitation Source by Kouroublakis, Minas, Tsitsas, Nikolaos L., Fikioris, George

“…The method of auxiliary sources (MAS) is one of the numerical methods employed for the determination of the cutoff wavenumbers (eigenvalues) of cylindrical…”
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Shielding Effectiveness of Magnetostatically-Biased Anisotropic Graphene by the Method of Auxiliary Sources with a Surface Current Boundary Condition by Kouroublakis, Minas, Tsitsas, Nikolaos L., Fikioris, George

“…Extensive experimental data and numerical simulations show that graphene is an ideal shielding material in the RF/microwave region. In most cases, it is…”
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Second‐kind Fredholm integral‐equation analysis of scattering by layered dielectric gratings by Tsitsas, Nikolaos L.

“…Scattering of the E‐polarised plane electromagnetic wave from two different but of the same‐period all‐dielectric rectangular bar gratings on substrates is…”
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Method of Auxiliary Sources With an Excitation Source: The Auxiliary-Current Vector Norm by Kouroublakis, Minas, Tsitsas, Nikolaos L., Fikioris, George

“…The method of auxiliary sources with an excitation source (MAS-ES) is a reliable method for determining the eigenvalues <inline-formula> <tex-math…”
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Exploring the inverse line-source scattering problem in dielectric cylinders with deep neural networks by Pallikarakis, Nikolaos, Kalogeropoulos, Andreas, Tsitsas, Nikolaos L

“…Abstract This study presents a novel approach utilizing deep neural networks to address the inverse line-source scattering problem in dielectric cylinders. By…”
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Shielding Effectiveness of Ideal Monolayer Graphene in Cylindrical Configurations With the Method of Auxiliary Sources by Kouroublakis, Minas, Tsitsas, Nikolaos L., Fikioris, George

“…Electromagnetic shielding is one of the most important branches of Electromagnetic Compatibility. Traditionally, metals were commonly used for shielding…”
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Shielding Effectiveness of Metamaterial Cylindrical Arrays via the Method of Auxiliary Sources by Kouroublakis, Minas, Zouros, Grigorios P., Tsitsas, Nikolaos L.

“…Cylindrical arrays have been extensively used as key components of metamaterials (MMs) showcasing in a specific frequency range either an effective negative…”
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Analytical algorithms for direct and inverse problems pertaining to the electromagnetic excitation of a layered medium by N dipoles by Kalogeropoulos, Andreas, Tsitsas, Nikolaos L.

“…The direct problem of exciting a multilayered spherical medium by a distribution of arbitrarily located (internal and external) electric dipoles is considered…”
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Convergence Analysis of the Currents and Fields Involved in the Method of Auxiliary Sources Applied to Scattering by PEC Cylinders by Kouroublakis, Minas, Tsitsas, Nikolaos L., Fikioris, George

“…The method of auxiliary sources (MAS) is an established technique for the numerical solution of electromagnetic shielding and scattering problems exhibiting an…”
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On Methods Employing Auxiliary Sources for 2-D Electromagnetic Scattering by Noncircular Shapes by Tsitsas, Nikolaos L., Zouros, Grigorios P., Fikioris, George, Leviatan, Yehuda

“…Methods employing auxiliary sources are applied to electromagnetic scattering problems by 2-D noncircular scatterers. Specific cases are considered for which…”
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Non-volatile MWIR/LWIR beam reconfigurability with all-dielectric metagratings comprising phase-change materials with a high-refractive-index shift by Tsitsas, Nikolaos L., Foteinopoulou, Stavroula

“…We propose an all-dielectric grating paradigm comprising an optical-phase-change-material (O-PCM), functional in the 5 μ m to 10 μ m spectral range. This…”
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Electromagnetic interactions of dipole distributions with a stratified medium: Power fluxes and scattering cross sections by Kalogeropoulos, Andreas, Tsitsas, Nikolaos L.

“…N magnetic dipoles radiate (inside or outside) a piecewise homogeneous (layered) and isotropic medium. The power fluxes and energy processes inside and outside…”
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