The nonlinear vibration of a flexible hoisting rope with time-varying length and axial velocity is investigated. The flexible hoisting rope is modeled as a taut translating string with a rigid body attached at its low end. A systematic procedure for deriving the system model of a flexible hoisting rope with time-varying length and axial velocity is presented. The governing equations were develo...

In this paper, the modified Euler-Bernoulli beam model is presented to examine the influence of surface elasticity and residual surface tension on the critical force of axial buckling of nanotubes in the presence of rotary inertia. An explicit solution is derived for the buckling loads of microscaled Euler beams considering surface effects. The size-dependent buckling behavior of the nanotube d...

Hillier and other researchers combined analysis of urban grids using axial maps with counts of pedestrian movements. They recognised the influence these grids played on pedestrian movements in cities and developed the ‘law of natural movement’ in which urban grids are principal generators of pedestrian movement and starting point for a city’s development into specialised ‘generative’ and ‘conse...

In this paper, we examine the movement of particles within a continuous powder mixer using PEPT (Positron Emission Particle Tracking). The benefit of the approach is that the particle movement along the vessel can be measured non-invasively. The effect of impeller rotation rate, powder flow rate, and powder cohesion on the particle trajectory, dispersive axial transport coefficient, and residen...

This study is designed to accurately simulate a helical CT-scanner for the purpose of estimating radiation dose and to perform validation experiments involving several dose profile and ionization chamber measurements. To accomplish this we have modified a general purpose Monte Carlo transport code (MCNP4B) as the framework for simulating the x-ray source and its movement, photon transport and r...

Seven different suspension systems for below-knee prostheses were tested on 20 adult, unilateral amputees. All subjects walked with a prosthesis. Gait was evaluated with regard to longitudinal and vertical accelerations of the body, forward velocity, axial (piston) movement of amputated limb in the socket, and knee movement. Harmonic analyses of variable waveforms provided the primary method to...