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In this paper, a regularized full-wave analysis of electromagnetic scattering from a finite-length closed perfect electric conducting circular cylinder is presented. By exploiting the azimuthal symmetry of the problem, the classical electric field integral equation is reduced to an infinite set of systems of one-dimensional integral equations in the spectral domain and solved by applying the Galerkin method with expansion functions reconstructing the physical behaviour of the unknown induced surface current density. In this way, regularization and quick convergence are achieved. Comparisons with the results in the literature and the ones obtained by means of commercial software CST Microwave Studio Suite are presented, showing the effectiveness of the proposed method.This article is part of the theme issue 'Analytically grounded full-wave methods for advances in computational electromagnetics'.
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http://dx.doi.org/10.1098/rsta.2024.0346 | DOI Listing |
Philos Trans A Math Phys Eng Sci
August 2025
Department of Electrical and Information Engineering 'Maurizio Scarano', University of Cassino and Southern Lazio, Cassino, Lazio, Italy.
In this paper, a regularized full-wave analysis of electromagnetic scattering from a finite-length closed perfect electric conducting circular cylinder is presented. By exploiting the azimuthal symmetry of the problem, the classical electric field integral equation is reduced to an infinite set of systems of one-dimensional integral equations in the spectral domain and solved by applying the Galerkin method with expansion functions reconstructing the physical behaviour of the unknown induced surface current density. In this way, regularization and quick convergence are achieved.
View Article and Find Full Text PDFPNAS Nexus
February 2025
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bengaluru, Karnataka 560012, India.
Liquid-liquid phase separation (LLPS) exhibited by intrinsically disordered proteins (IDPs) depends on the solvation state around the -regime, which separates good from poor solvent. Experimentally, the -solvent regime of the finite length () IDPs, as probed by small angle X-ray scattering (SAXS) and single molecular fluorescence resonance energy transfer (smFRET), is in disagreement. Using computer simulations of a coarse-grained IDP model, we address the effect of chain length on the -regime of IDPs with polar side chains (polyglutamine) and hydrophobic side chains (polyleucine) subject to varying concentrations of cosolvents , urea (denaturant) or trimethylamine N-oxide (protective osmolyte) in water.
View Article and Find Full Text PDFJ Acoust Soc Am
October 2023
Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.
Combining virtual sensing (VS) with scattered sound control enables active acoustic cloaking when there are limitations in sensor configurations. The remote microphone method and additional filter method (AFM) are two common VS methods, and both can be divided into the training and control stages; the consistency of the environments in these two stages is essential for the control system. This paper investigates the effects of uncertainties in the incidence angle of the detection wave on these two VS-based scattered sound control methods.
View Article and Find Full Text PDFNanomaterials (Basel)
July 2023
Institute of Automation and Control Processes, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690041, Russia.
Unusual optical properties of laser-ablated metal surfaces arise from the excitation of local plasmon resonances in nano- and microstructures produced by laser-processing and from the mutual interaction of those structures through surface plasmon polariton (SPP) waves. This interaction provides a synergistic effect, which can make the optical properties of the composite nanostructure drastically different from the properties of its elements. At the same time, the prediction and analysis of these properties are hampered by the complexity of the analytical solution to the problem of SPP excitation by surface objects of arbitrary configuration.
View Article and Find Full Text PDFPhys Rev Lett
April 2023
University of Rochester Laboratory for Laser Energetics, Rochester 14623, New York, USA.
Inverse bremsstrahlung absorption was measured based on transmission through a finite-length plasma that was thoroughly characterized using spatially resolved Thomson scattering. Expected absorption was then calculated using the diagnosed plasma conditions while varying the absorption model components. To match data, it is necessary to account for (i) the Langdon effect; (ii) laser-frequency (rather than plasma-frequency) dependence in the Coulomb logarithm, as is typical of bremsstrahlung theories but not transport theories; and (iii) a correction due to ion screening.
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