We study the existence of solutions to the porous medium equation with a nonnegative, finite Radon measure on the right hand side. We show that such problems have solutions in a wide class ofâ€¦ (More)

We study regularity properties of weak solutions to elliptic equations involving variable growth exponents. We prove the sufficiency of a Wiener type criterion for the regularity of boundary points.â€¦ (More)

This article describes modal analysis of acoustic waves in the human vocal tract while the subject is pronouncing [o]. The model used is the wave equation in three dimensions, together withâ€¦ (More)

We discuss recording arrangements for speech during an MRI scan of the speakers vocal tract. The image and sound data thus obtained will be used for construction and validation of a numerical modelâ€¦ (More)

Proceedings of the 6th Nordic Signal Processingâ€¦

2004

A parametric synthesis model for wind chimes is presented. A physics-based stochastic process is used to trigger a modal sound-production model for the tubes of a wind chime. Mode parameters areâ€¦ (More)

We show that given a positive and finite Radon measure Î¼, there is a p(x)-superharmonic function u which satisfies âˆ’ divA(x,Du) = Î¼ in the sense of distributions. Here A is an elliptic operator withâ€¦ (More)

We study superparabolic functions related to nonlinear parabolic equations. They are de ned by means of a parabolic comparison principle with respect to solutions. We show that every superparabolicâ€¦ (More)