HIV evolution model that describes the dynamics of concentrations of uninfected and infected cells is considered in the paper. The introduction of dimensionless variables and parameters leads to the initial boundary value problem for singularly perturbed system of partial integro-differential equations. By Tikhonov-Vasil’eva boundary functions method asymptotic solution with boundary layer is c...

In this article, the performance of the novel external stimulation oscillator and the optimized selfexcited oscillator has been investigated by CFD numerical simulation. The efficiency and stimulation mechanism of the two kinds of oscillators were analyzed in numeric form. The cycle proportion of wall-attached jet switching time was calculated separately at different operating frequency. Additi...

High field wigglers for synchrotron radiation production have usually rather complex distribution of magnetic field, and particle motion through it can hardly be treated analytically. This paper concerns a simple and reliable receipt for a symplectic algorithm to track a particle through such fields. Input data for numeric integration are taken directly from results of magnetic mapping or simul...

Simulation designers benefit from a flexible system for creating scenarios that are easy to modify, expressive, and allow for more complex interventions to be assessed. This technical report introduces a C-like scripting language that can be used with Construct in order to support numeric variables as well as user-specified decisions. This scripting language can be used to specify outputs in a ...

BACKGROUND AND PURPOSE Cerebral artery aneurysms rupture when wall tension exceeds the strength of the wall tissue. At present, risk-assessment of unruptured aneurysms does not include evaluation of the lesions shape, yet clinical experience suggests that this is of importance. We aimed to develop a computational model for simulation of fluid-structure interaction in cerebral aneurysms based on...

The numerical simulation of the rehabilitation to walking of disabled people by Functional Electric Stimulation can offer new tools in the design and optimization of stimulation patterns, but some Hybrid Dynamics need to be taken into account. We propose here a specific time-integration scheme for such dynamical systems, with a particular emphasis on the various measures that need to be underta...

An experiment was carried out to estimate the effect of sound feedback on the work of a plant operator. Eight students of computer science operated a process simulation program of an assembly line with computer numeric controlled (CNC) robots. Relevant information of disturbances and machine breakdowns was given only in a visual (test condition 1), and in visual and audible form (test condition...