The electromagnetic field of the ultrarelativistic Reissner Nordstrøm Solution shows the physically highly unsatisfactory property of a vanishing field tensor but a nonzero, i.e. δ-like, energy density. The aim of this work is to analyse this situation from a mathematical point of view, using the framework of Colombeau’s theory of nonlinear generalized functions. It is shown that the physically...

We present a new inverse and physically-consistent traction force microscopy method developed implemented in the context of 3D nonlinear elasticity. prove its enhanced accuracy applying it to real cases cells cultured hydrogel.

A highly localized data-association measure, termed intrinsic synchrosqueezing transform (ISC), is proposed for the analysis of coupled nonlinear and non-stationary multivariate signals. This is achieved based on a combination of noise-assisted multivariate empirical mode decomposition and short-time Fourier transform-based univariate and multivariate synchrosqueezing transforms. It is shown th...

Objective: The aim of this study was to identify the significant difficulties in access to health care services experienced by patients with physical disabilities. Method: A cross-sectional study at King Abdul Aziz Medical City, Riyadh, Saudi Arabia on 235 persons with physical disability, from 1 January to 30 June 2014. Results: A total of 88% of the people with disability reported having the ...

Interactive simulation is made possible in many applications by simplifying or culling the finer details that would make real-time performance impossible. This paper examines detail simplification in the specific problem of collision handling for rigid body animation. We present an automated method for calculating consistent collision response at different levels of detail. The mechanism works ...

We describe a variety of physically-based simulation techniques used to generate the motion of objects for computer animated scenes. Using cla,>sical mechanics , we model rigid , fl exible and breakable objects and their interaction with wind fields . Complex motion can be controlled by specifying initial conditions, designing wind fields , and using an interactive previewing capability to view...

hammerstein-wiener (hw) models are capable in describing nonlinear dynamic systems. these models are nonlinear and have been widely used in a wide range of sciences due to their simplicity and having a physically-based concept. in this research, for the first time in hydrology and water resources management, three different structures of these models using daily temperature and precipitation da...

This paper concerns an optimization problem related to the Poisson equation for the p-Laplace operator, subject to homogeneous Dirichlet boundary conditions. Physically the Poisson equation models, for example, the deformation of a nonlinear elastic membrane which is fixed along the boundary, under load. A particular situation where the load is represented by a characteristic function is invest...