Results 11 to 20 of about 156,506 (292)

A WISER way for simulating the performance of gratings

open access: yesJournal of Synchrotron Radiation, 2022
Soft X-ray monochromators for synchrotron radiation sources have been continuously developed over the years, improving energy resolution and stability.
Michele Manfredda   +2 more
doaj   +1 more source

Numerical Study on Hydrodynamics of Ships with Forward Speed Based on Nonlinear Steady Wave

open access: yesJournal of Marine Science and Engineering, 2020
In this paper, an improved potential flow model is proposed for the hydrodynamic analysis of ships advancing in waves. A desingularized Rankine panel method, which has been improved with the added effect of nonlinear steady wave-making (NSWM) flow in ...
Tianlong Mei   +3 more
doaj   +1 more source

A Coupling between Integral Equations and On-Surface Radiation Conditions for Diffraction Problems by Non Convex Scatterers [PDF]

open access: yesMathematics, 2021
The aim of this paper is to introduce an orignal coupling procedure between surface integral equation formulations and on-surface radiation condition (OSRC) methods for solving two-dimensional scattering problems for non convex structures. The key point is that the use of the OSRC introduces a sparse block in the surface operator representation of the ...
Alzahrani, Saleh Mousa   +2 more
openaire   +3 more sources

Investigation on surface plasmon polaritons and localized surface plasmon production mechanism in micro-nano structures

open access: yesJournal of Electronic Science and Technology, 2022
The simulation mechanism of surface plasmon polaritons (SPPs) and localized surface plasmon (LSP) in different structures was studied, including the Au reflection grating (Au grating), Au substrate with dielectric ribbons grating (Au substrate grating ...
Ling-Xi Hu, Min Hu, Sheng-Gang Liu
doaj   +1 more source

Effect of Internal Fluid Resonance on the Performance of a Floating OWC Device

open access: yes한국해양공학회지, 2021
In the present study, the performance of a floating oscillating water column (OWC) device has been studied in regular waves. The OWC model has the shape of a hollow cylinder.
Il Hyoung Cho
doaj   +1 more source

Holography and Coherent Diffraction with Low-Energy Electrons: A Route towards Structural Biology at the Single Molecule Level [PDF]

open access: yes, 2015
The current state of the art in structural biology is led by NMR, X-ray crystallography and TEM investigations. These powerful tools however all rely on averaging over a large ensemble of molecules.
Escher, Conrad   +3 more
core   +1 more source

DIPOLE ANTENNAS WITH A SECTOR-SHAPED RADIATION PATTERN [PDF]

open access: yesRadio Physics and Radio Astronomy
Subject and Purpose. The directivity characteristics of a dipole antenna when it is placed above and parallel to a perfectly conducting screen of rectangular shape are considered, aiming to theoretically study dipole antennas with sector-shaped radiation
M. M. Gorobets   +3 more
doaj   +1 more source

Effects of diffraction and radiation on a submerged sphere

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
This paper deals with an investigation of the effects of diffraction and radiation on a submerged sphere in water of finite depth d. We assume that the fluid is homogeneous, inviscid, and incompressible, and the fluid motion is irrotational.
Matiur Rahman
doaj   +1 more source

A simple method for the determination of the structure of ultrashort relativistic electron bunches [PDF]

open access: yes, 2004
In this paper we propose a new method for measurements of the longitudinal profile of 100 femtosecond electron bunches for X-ray Free Electron Lasers (XFELs).
Ayvazyan   +16 more
core   +1 more source

Propagation of Radiofrequency Waves in Space

open access: yesTerritoire en Mouvement, 2022
This paper deals with the scattering of electromagnetic waves in space, in particular that of radio waves used for broadcasting, TV and telecommunications.
Bernard Démoulin
doaj   +1 more source

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