Most knee implants are multi radius in design, incorporating a shifting centre of rotation of the knee as it moves through flexion. Recent advances in kinematic theory however suggest a single axis of flexion / extension is located in the distal femur. A recently launched TKA implant (Triathlon, Stryker US®), is based on this theory, adopting a single radius of curvature femoral component. It i...

We introduce a novel method for the generation of fully adaptive streak surfaces in time-varying flow fields based on particle advection and adaptive mesh refinement. Moving least squares approximation plays an important role in multiple stages of the proposed algorithm, which adaptively refines the surface based on curvature approximation and circumradius properties of the underlying Delaunay ...

The paper describes an algorithm to generate a triangulation of an implicit surface. The generated triangles are close to equilateral and the triangle edge lengths vary with local surface curvature (the user may choose the ratio of edge length to surface curvature). The output of this algorithm is useful for applications that require high quality triangulations, such as medical imaging, molecul...

Refractive and profilometric analyses of lenses with large radii of curvature and/or large focal distance were performed through photorefractive holography using a Bi12TiO20 crystal as the recording medium and two red diode lasers as light sources. Both lasers were properly aligned and tuned in order to provide submillimetric synthetic wavelengths providing real-time interferograms in a two-col...

in this study the land surface in western half of hyper-arid lut desert, in south east of iran, which is covered by yardangs, a worldwide typical landform for aeolian erosion, were classified by self organizing maps (som) method. in the first step by using digital elevation model with 10 m resolution and matlab software, 22 morphometric parameters were calculated based on derivative of the surf...

In this paper, we introduce a new method for pattern characterisation in the context of pattern recognition. This method is based on the analysis of the contour of planar objects like the CSS (Curvature Scale Space) method that uses the maxima of the curvature zero-crossing. The input contour is separated into two signals according to its coordinates x and y which are progressively low-pass fil...

The current study uses reach tracking to investigate how cognitive control is implemented during online performance of the Stroop task (Experiment 1) and the Eriksen flanker task (Experiment 2). We demonstrate that two of the measures afforded by reach tracking, initiation time and reach curvature, capture distinct patterns of effects that have been linked to dissociable processes underlying co...

Here, a Finsler manifold $(M,F)$ is considered with corresponding curvature tensor, regarded as $2$-forms on the bundle of non-zero tangent vectors. Certain subspaces of the tangent spaces of $M$ determined by the curvature are introduced and called $k$-nullity foliations of the curvature operator. It is shown that if the dimension of foliation is constant, then the distribution is involutive...