BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Acoustic scattering by screens and wedges with impedance boundary 
 conditions - David Hewett (UCL)
DTSTART:20211101T153000Z
DTEND:20211101T163000Z
UID:TALK164104@talks.cam.ac.uk
CONTACT:Alistair Hales
DESCRIPTION:In this talk I will discuss two contributions to the study of 
 boundary value problems for the Helmholtz equation involving impedance (ab
 sorbing) boundary conditions on non-smooth boundaries. The first is an "ed
 ge source" representation for the canonical problem of scattering by a rig
 ht-angled impedance wedge\, in which the diffracted field is represented a
 s an integral of secondary sources over the diffracting edge. The second i
 s a well-posedness analysis and boundary element discretization of scatter
 ing by a planar impedance screen. The novelty in the latter case is the fa
 ct that we make no regularity assumption on the boundary of the screen\, s
 o our results are valid for screens with fractal boundaries\, such as the 
 Koch snowflake. 
LOCATION:CMS\, MR14
END:VEVENT
END:VCALENDAR