28 research outputs found
LCP external fixation - External application of an internal fixator: two cases and a review of the literature
The locking compression plate (LCP) is an angle-stable fixator intended for intracorporeal application. In selected cases, it can be applied externally in an extracorporeal location to function as a monolateral external fixator. We describe one patient with Schatzker V tibial plateau fracture and one patient with Gustillo IIIB open tibia shaft fracture treated initially with traditional external fixation for whom exchange fixation with externally applied LCPs was performed. The first case went on to bony union while the second case required bone grafting for delayed union. Both patients found that the LCP external fixators facilitated mobilization and were more manageable and aesthetically acceptable than traditional bar-Schanz pin fixators
Improving CFD prediction of drag on Paralympic tandem athletes: influence of grid resolution and turbulence model
Draginteractie tussen wielrenners, volgauto's en volgmotoren
Het is welbekend dat wielrenners die achter een andere renner, een auto of een motor rijden minder luchtweerstand hebben. Recent onderzoek toont aan dat de renner die vóór een andere renner, een auto of een motor rijdt, hier ook voordeel van heeft. Dat kan zelfs verscheidene secondes tijdwinst opleveren, wat het verschil kan zijn tussen winst of verlies
an analysis of cases
Social roblems! and public image of the housing estates of 1960\u27s in Spai
Aerodynamic benefit for a cyclist by a following motorcycle
In recent years, many accidents have occurred between cyclists and in-race motorcycles, even yielding fatal injuries. The accidents and the potential aerodynamics issues have impelled the present authors to perform dedicated wind-tunnel measurements and Computational Fluid Dynamics (CFD) simulations to assess cyclist drag reduction when followed by one, two or three motorcycles. The 3D steady-state Reynolds-Averaged\u3cbr/\u3eNavier-Stokes simulations with the standard k-ε model are validated by the wind-tunnel tests. The cyclist drag reduction goes up to 8.7% for a single trailing motorcycle and to 13.9% for three trailing motorcycles at a distance of 0.25 m behind the cyclist. This distance is not uncommon in elite races, as evidenced by the many recent accidents. The effect by a single following motorcycle at realistic short distances d=0.25 m (8.7%), d = 0.5 m (6.4%) and d=1 m (3.8%) is larger than that by a following car at realistic short distance d=5 m (1.4%). Therefore it could be argued that in-race motorcycles are not only more dangerous but also aerodynamically more influential. This study reinforces the necessity for the International Cycling Union to change the rules concerning in-race motorcycles, not only to avoid accidents but also to avoid unwanted aerodynamic benefits
Draginteractie tussen wielrenners, volgauto's en volgmotoren
Het is welbekend dat wielrenners die achter een andere renner, een auto of een motor rijden minder luchtweerstand hebben. Recent onderzoek toont aan\u3cbr/\u3edat de renner die vóór een andere renner, een auto of een motor rijdt, hier ook voordeel van heeft. Dat kan zelfs verscheidene secondes tijdwinst opleveren,\u3cbr/\u3ewat het verschil kan zijn tussen winst of verlies