This paper is concerned with the modelling and simulation of amorphous and microcrystalline silicon optoelectronic devices. The physical model and its mathematical formulation are extensively described. Its numerical reduction is also discussed together with the presentation of a computer...

This paper discusses a method for using the reflected signal from a stepped-frequency radar system to obtain the electrical permittivity and conductivity in a thin layer at the flat surface of a (possibly inhomogeneous) body. The method is based on a band-limited version of geometrical optics.

In archaeology, knowledge about the degradation of strongly eroded signs (hieroglyphs) is important to estimate their original shape and thus identify their possible meaning. The degradation of a sign is ruled by a time-dependent flow of material which can be modeled by either a backward or a...

Exact one-way re-formulations of the Helmholtz equation are useful for waveguide problems, since the resulting equations can be efficiently solved as ‘initial’ value problems by range marching methods. Some numerical methods for these re-formulations are reviewed in this paper. This includes...

Data do not adhere to the usual statistical assumptions and applied work is made difficult by the need to cope with the myriad of problems that arise from flawed data. Prominent examples are data that contain missing values or where variables are only available in categorised form. Standard...

This paper is concerned with R/S analysis given a fractional ARIMA(p,d,q) model with finite variance where the aim is to estimate the intensity of long-range dependence of the particular series. This is done through what is commonly referred to as the Hurst parameter (denoted by H). H is a...

A time domain wave-splitting approach to the inverse problem for a hyperbolic differential equation in an inhomogeneous half-space is considered (the wave velocity is assumed to be constant). A layer stripping method is used to reconstruct the parameter in a non-iterative way, using the...

In this paper a class of models on nonlinear rods, which includes spatial inhomogeneities, varying cross-sectional area and arbitrary memory functions, is considered. The wave splitting technique is applied to provide a formulation suitable for numerical computation of direct and inverse...

The symmetric causal/acausal dichotomy based model is developed for the bounded noncausal internal dynamics of a high-speed flexible beam, and the resultant modeling redundancy is revealed. The efficient algorithm for computing the nominal torque as well as the state trajectories is proposed to...

A symmetric boundary element method for the static contact problem with Coulomb friction is presented. The method is based on the penalty approximation, a smooth approximation of the Coulomb law of friction and a symmetric discretization of the Steklov–Poincaré operator. The convergence of...