منابع مشابه
Energy decay for Maxwells equations with Ohms law in partially cubic domains
We prove a polynomial energy decay for the Maxwells equations with Ohms law in partially cubic domains with trapped rays. We extend the results of polynomial decay for the scalar damped wave equation in partially rectangular or cubic domain. Our approach have some similitude with the construction of reected gaussian beams. Keywords .Maxwells equations; decay estimates; trapped ray. 1 Introd...
متن کاملHow to Simulate the Whispering-Gallery-Modes of Dielectric Microresonators in FEMLAB/COMSOL
It is explained how FEMLAB / COMSOL Multiphysics can be configured to calculate, the frequencies, electromagneticfield patterns, mode volumes, filling factors, radiation losses ... of the whispering-gallery modes of axisymmetric microresonators. The method exploits COMSOL’s ability to accept the definition of solutions to Maxwells equations in so-called ‘weak form’. As no transverse approximati...
متن کاملSummation-by-parts in time
We develop a new high order accurate time-integration technique for initial value problems. We focus on problems that originate from a space approximation using high order finite difference methods on summation-by-parts form with weak boundary conditions, and extend that technique to the timedomain. The new time-integration method is global, high order accurate, unconditionally stable and toget...
متن کاملAction Functional of the Electomagnetic Field: Effect of Gravitation
The scalar wave equation for a potential in a curved space time, i.e., the Laplace-Beltrami equation has been studied in this work. An action principle is used to derive a finite element algorithm for determining the modes of propagation inside a waveguide of arbitrary shape. Generalizing this idea, the Maxwell theory in a curved space time determines a set of linear partial differential equati...
متن کاملSummation-By-Parts Operators for Time Discretisation: Initial Investigations
We develop a new high order accurate time-discretisation technique for initial value problems. We focus on problems that originate from a space discretisation using high order finite difference methods on summation-by-parts form with weak boundary conditions, and extend that technique to the time-domain. The new timediscretisation method is global and together with the approximation in space, i...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Slagmark - Tidsskrift for idéhistorie
سال: 2018
ISSN: 1904-8602,0108-8084
DOI: 10.7146/sl.v0i28-29.103908