Clarification of Features of the Wheel Movement with a Perspective Constructive Scheme on a Rail

The article presents the continuation of studies of the features of the wheel movement the traditional and perspective constructive scheme on a rail. Unlike the traditional design, the perspective constructive scheme of the wheel allows independent relative rotation of the support surface wheel and of its guide surface (flange) relative to their common axis of rotation. Previous authors’ works did not take into account the influence of the level of slippage in the main contact of the wheel with the rail on the value of the slippage rate in its flange contact. This article further examines the influence of this factor for both wheel designs. The results of the presented studies confirm the possibility of reducing slippage in the flange contact with the rail for a wheel of a promising design scheme in comparison with a traditional wheel. Reducing the power of friction forces in the contact of the wheel flange of a promising design scheme will reduce the resistance to movement of such a wheel along the rail, especially in curved track sections.

Semmes Weinstein Monofilaments Versus Weinstein Enhanced Monofilaments: Their Use in the Hand Clinic

The frequency of testing pressure threshold, the time consumed for testing, and the slippage rate using the original Semmes Weinstein monofilaments and the enhanced monofilaments (west) in the hand clinic are studied. A modified technique of using the west device is also described. It is concluded that west has several advantages and will likely encourage hand surgeons to perform pressure threshold testing more frequently in the clinic.