We propose an explanatory approach to Café Wall type illusions that is simple yet fairly comprehensive. These illusions are constructed out of basic elementary units in a jigsaw-like manner. Each unit, in general, contains both a solid body and a thin tail: the contrast polarity between the two determines the direction of the contributory illusory tilt produced by that element-according to a he...

Several studies in cognitive sciences have highlighted the existence of privileged and universal psychological associations between shape attributes, such as angularity, and auditory dimensions, such as pitch. These results add a new puzzle to the list of arbitrary-looking crossmodal matching tendencies whose origin is hard to explain. The puzzle is all the more general in the case of shape tha...

Abstract The shape of tailing particles is essential factors their macroscopic mechanical properties. Scholars have studied the effects controllable factors, such as loading method, confining pressure, and strain rate, on strength sand. However, research particle structure through laboratory tests has proved to be difficult due uncertain discrete distribution. Thus, macro-mesoscopic response he...

In this work, the signals generated by grain-to-base multiple impacts of three different granular materials flowing along an inclined chute and characterized unsteady-state conditions are investigated through discrete element method (DEM). The effect grain-size angularity grains taken into account. Various instants flows studied, focusing in particular on analysis signal produced passage materi...

A set of n points in the plane is in equiangular configuration if there exist a center and an ordering of the points such that the angle of each two adjacent points w.r.t. the center is 360 ◦ n , i.e., if all angles between adjacent points are equal. We show that there is at most one center of equiangularity, and we give a linear time algorithm that decides whether a given point set is in equia...

A simple many-body interatomic potential is proposed. This is an empirical extension of the embedded-atom method (EAM). The EAM models the lattice energy and elastic compressibility using a pair interaction plus a many-body term. It does not include any contribution of many-body terms to the crystal elastic shear. This contribution is included in the model developed here. It implies a simplifie...