Zobrazeno 1 - 10
of 115
pro vyhledávání: '"LANGDON, STEPHEN"'
Autor:
Langdon, Stephen, Needham, David J.
As a helicopter descends towards a bed of sand, a high velocity particle laden cloud can form around the helicopter body, a phenomenon known as "brownout", and a consequence of which can potentially be a significant deterioration in visibility for th
Externí odkaz:
http://arxiv.org/abs/2412.16438
We propose a boundary element method for problems of time-harmonic acoustic scattering by multiple obstacles in two dimensions, at least one of which is a convex polygon. By combining a Hybrid Numerical Asymptotic (HNA) approximation space on the con
Externí odkaz:
http://arxiv.org/abs/1903.04449
For problems of time-harmonic scattering by polygonal obstacles, embedding formulae provide a useful means of computing the far-field coefficient induced by any incident plane wave, given the far-field coefficient of a relatively small set of canonic
Externí odkaz:
http://arxiv.org/abs/1805.08988
Autor:
Langdon, Stephen Fife
Large boreal peatland complexes are at the southern extent of their range in New York State and contribute considerably to regional biodiversity with their distinctive flora and fauna. The goal of this study is to inform conservation management of pe
Externí odkaz:
http://pqdtopen.proquest.com/#viewpdf?dispub=1585740
We present a novel hybrid numerical-asymptotic boundary element method for high frequency acoustic and electromagnetic scattering by penetrable (dielectric) convex polygons. Our method is based on a standard reformulation of the associated transmissi
Externí odkaz:
http://arxiv.org/abs/1704.07745
Autor:
Brooks, Jeffrey J.1 (AUTHOR) jeffrey.brooks@boem.gov, Markegard, Sarah I.2 (AUTHOR), Langdon, Stephen J.3 (AUTHOR), Anderstrom, Devlin Shaag̱aw Éesh4 (AUTHOR), Douville, Michael Gitwaayne5 (AUTHOR), George, Thomas A.6 (AUTHOR), Jackson, Michael Kauish7 (AUTHOR), Jackson, Scott Gus'tú8 (AUTHOR), Mills, Thomas Ḵaachkutí9 (AUTHOR), Ramos, Judith Dax̠ootsú10 (AUTHOR), Rowan, Jon Yaanasgít11 (AUTHOR), Sanderson, Tony12 (AUTHOR), Smythe, Chuck13 (AUTHOR)
Publikováno v:
Journal of Wildlife Management. Aug2024, Vol. 88 Issue 6, p1-35. 35p.
We describe some recent advances in the numerical solution of acoustic scattering problems. A major focus of the paper is the efficient solution of high frequency scattering problems via hybrid numerical-asymptotic boundary element methods. We also m
Externí odkaz:
http://arxiv.org/abs/1410.6137
In this paper we propose and analyse a hybrid numerical-asymptotic boundary element method for the solution of problems of high frequency acoustic scattering by a class of sound-soft nonconvex polygons. The approximation space is enriched with carefu
Externí odkaz:
http://arxiv.org/abs/1401.2817
We propose and analyse a hybrid numerical-asymptotic $hp$ boundary element method for time-harmonic scattering of an incident plane wave by an arbitrary collinear array of sound-soft two-dimensional screens. Our method uses an approximation space enr
Externí odkaz:
http://arxiv.org/abs/1401.2786