Our goal is to work out an integration process which makes it possible to give a global design scheme obtained from several schemes, each of them describing the same reality viewed in different ways, in order to obtain the fullest view. Problems and conflicts arise during the scheme integration. They are due to the several ways of representing the knowledge semantic and of structuring knowledge...

We address the formulation and analysis of energy momentum conserving time integration schemes in context particle dynamics, particular atomic systems. The article identifies three critical aspects these models that demand a careful when discretized: first, treatment periodic boundary conditions; second, approximations systems with three-body interaction forces; third, their extension to functi...

There are fragmentations in Iran’s health insurance system. Multiple health insurance funds exist, without adequate provisions for transfer or redistribution of cross subsidy among them. Multiple risk pools, including several private secondary insurance schemes, have resulted in a tiered health insurance system with inequitable benefit packages for different segments of the population. Also fra...

Several techniques for the numerical integration of particle paths in steady and unsteady vector (velocity) elds are analyzed. Most of the analysis applies to unsteady vector elds, however, some results apply to steady vector eld integration. Multi-step, multi-stage, and some hybrid schemes are considered. It is shown that due to initialization errors, many unsteady particle path integration sc...

We describe a new family of weak p-th order accurate SDE time integration schemes, called the Direct Richardson p-th order accurate (DRp) schemes. The DRp schemes use the idea of Richardson extrapolation on Euler time steps, performed by way of an acceptance-rejection algorithm. Previous applications of Richardson extrapolation to the Euler scheme are applicable only when the objective is to es...

The context of this work is the development first order total variation diminishing (TVD) implicit-explicit (IMEX) Runge-Kutta (RK) schemes as a basis Multidimensional Optimal Order detection (MOOD) approach to approximate solution hyperbolic multi-scale equations. A key feature our newly proposed TVD that resulting CFL condition does not depend on fast waves considered model, long they are int...