Parameterizing a genus-0 mesh onto a unit sphere means assigning a 3D position on the unit sphere to each vertex of the mesh, such that the spherical mapping induced by the mesh connectivity is not too distorted and does not have overlapping areas. The non-overlapping requirement is technically the most difficult component also the most critical component of many spherical parametrization metho...

This paper reports an optofluidic lens with low spherical and low field curvature aberrations through the desired refractive index profile by precisely controlling the mixing between ethylene glycol and deionized water in an optofluidic chip. The experimental results demonstrate that the spherical aberration is reduced to 19.5 μm and the full width at half maximum of the focal point is 7.8 μm w...

The potential of spherical-harmonics beamforming (SHB) techniques for the auralization of target sound sources in a background noise was investigated and contrasted with traditional head-related transfer function (HRTF)-based binaural synthesis. A scaling of SHB was theoretically derived to estimate the free-field pressure at the center of a spherical microphone array and verified by comparing ...

Computing a bijective spherical parametrization of a genus-0 surface with low distortion is a fundamental task in geometric modeling and processing. Current methods for spherical parametrization cannot, in general, control the worst case distortion of all triangles nor guarantee bijectivity. Given an initial bijective spherical parametrization, with high distortion, we develop a non-linear cons...

This paper presents detailed numerical simulations predicting the effective thermal conductivity of spherical monodisperse and polydisperse core–shell particles ordered or randomly distributed in a continuous matrix. First, the effective thermal conductivity of this three-component composite material was found to be independent of the capsule spatial distribution and size distribution. In fact,...

The mixed-symmetry collective modes are investigated in Cr-Fe nuclei, by analyzing the realistic shell-model wavefunctions via the Hn-cooling method. It is clarified that the relatively low-lying mixed-symmetry states behave like doorway states. For these nearly spherical nuclei, the lowest mixed-symmetry state is shown to have JP = 2+. An indication of the mixed-symmetry 3+ state is obtained. ...

Evaluations of the state-of-the-art of both academic face recognition algorithms and commercial systems have shown that performance of most current technologies degrades due to the variations of illumination. We propose a novel technique for face recognition under generic illumination in this paper, namely, calibrating an input face image to an image under canonical illumination, named as face ...