Abstract The present paper investigates the static equilibrium of a thin elastic structure with concave sidecut pressed against flat rigid surface, as an idealization ski or snowboard undergoing conditions carved turn. An analytical model is derived to represent contact behaviour and provide explanation for concentrated loads occurring at extremities. deformations are prescribed assuming tied a...

In this paper we address the problem of comparing and classifying protein surfaces with graph-based methods. Comparison relies on matching surface graphs, extracted from the surfaces by considering concave and convex patches, through a kernelized version of the Softassign graph-matching algorithm. On the other hand, classification is performed by clustering the surface graphs with an EM-like al...

This paper describes a new 3D surface segmentation algorithm that separates a closed surfaces into regions by computing surface contours that traverse ridges of highcurvature surface regions. We refer to the approach as ridge-walking since these contours tend to follow convex ridge-like structures and concave valley-like substructures present within the geometry of the model. Segmentation is ac...

The propagation of a normal shock wave along coupled convex–concave surface equal radii has been analysed experimentally and numerically in this study. experimental numerical studies were conducted using similar geometry as that used by Ram et al. ( J. Fluid Mech. , vol. 768, 2015, pp. 219–239) for studying the transition from regular reflection to Mach reflection. Many interesting flow feature...

A direct method for the recovery of su$ace shape from image shading is presented. The method in its basic form is applicable to shading pattems obtained when a distant overhead point light-source illuminates a convex or concave Lambertian surface possessing a single extrema1 point at which surface height has either a local maximum or local minimum. A key quality of the method is its ability to ...

We present a fully monolithically integrated long vertical cavity surface emitting laser using an InGaAs/GaAs/AlGaAs gain medium directly bonded to a glass substrate with a concave micromirror. The lasing wavelength is 980nm with a threshold of 20mA for a 52microm mesa, differential quantum efficiency of 58%, and maximum output power of 39mW.

It is shown that the dispersive Rayleigh wave propagating around a concave cylindrical surface is substantially less attenuated by fluid loading than the corresponding wave on a flat surface. First, the analytical solution for vertically polarized shear wave scattering from a fluid-filled cylindrical cavity is formulated in the time domain, then the signal of interest is gated out and spectrum ...

2014 Linear analysis is used to study the free surface deflections of a fluid heated from below. Numerical calculations provide the regions for which the relief is convex or concave and the influence of the fluid parameters on the deflection. These theoretical results agree very well with the experimental ones obtained previously. J. Physique 46 (1985) 2047-2051 1 DTCEMBRE 1985,