conclusions pressure support ventilation, but not spontaneous breathing, induces a significant redistribution of ventilation towards the ventral region. the sensitivity of the support trigger appears to influence the distribution of ventilation only during the early phase of inspiration. background in supine position, pressure support ventilation causes a redistribution of ventilation towards t...

Tyre wet skid resistance greatly affects vehicle safety, and it is dependent on the frictional behaviour at tyre–road interface; however, currently available numerical models, using finite element method, either neglect road roughness or obtain rightness expensive computed tomography scans, rendering them inefficient complex. This study aims to present an estimation method of rubber slides a ro...

High-content waste-rubber-modified asphalt (HRMA) has high viscosity and poor storage stability. HRMA not only improves the properties of road asphalt, but also reduces environmental pollution caused by waste tires. Enhancing molecular interaction rubber is key to making full use HRMA. In this paper, aromatic oil was used as activator for rubber. The mechanism between investigated. radial distr...

air pads are applicable in ultra precision machines very much. two main components of these machines, spindle and table, use the advantages of such systems. the performance and efficiency of air pads have big influence on the whole machine quality. parameters affecting pressure distribution of air tables may be considered as, 1) air compressing method, 2) air nozzle diameter, shape, and size, 3...

We study the average separation between an elastic solid and a hard solid, with a nominally flat but randomly rough surface, as a function of the squeezing pressure. We present experimental results for a silicon rubber (PDMS) block with a flat surface squeezed against an asphalt road surface. The theory shows that an effective repulsive pressure acts between the surfaces of the form p∼exp(-u/u(...

Almost half the sphygmomanometers in a teaching hospital group had defects in the control valve which interfered with accurate blood-pressure reading. Ward staff should be taught to check sphygmomanometers regularly and replace control valves; time consumption and cost are low. The cuffs in general use in these hospitals, and of the standard size sold in Britain, had rubber bags which did not e...

duced. Mr. Walsham, he remembered, used ordinary rubber drainagetubes passed through the nose after septum operations. The tubes were perforated. The perforating was an advantage. Sir WILLIAM MILLIGAN agreed that they were excellent tubes, but it raised the question whether tubes were desirable at all. Mr. W. STUAET-LOW thought this question would make an excellent subject for a set discussion....

Dynamic compressive stress-strain curves at various strain rates of an EthylenePropylene-Diene Monomer Copolymer (EPDM) rubber have been determined with a modified split Hopkinson pressure bar (SHPB). The use of a pulse-shaping technique ensures that the specimen deforms at a nearly constant strain rate under dynamically equilibrated stress. The validity of the experiments was monitored by a hi...

diffusivity equation commonly used for pressure distribution prediction in porous media results from substituting equation of state and continuity equation in navier-stokes momentum equation. from mathematical point of view this equation format shows infinite propagation speed for pressure pulse through porous media, which is physically impossible. this issue may caused by numerous assumptions ...