We present a systematic numerical investigation of the shear strength and structure of granular packings composed of irregular polyhedral particles. The angularity of the particles is varied by increasing the number of faces from 8 (octahedronlike shape) to 596. We find that the shear strength increases with angularity up to a maximum value and saturates as the particles become more angular (be...

Two experiments with 72 participants in total investigated the route-angularity effect. This effect is shown when a greater number of turns along a route increase the estimated length of this route. In this study it was shown that the route-angularity effect is likely to be a memory-based effect depending on task difficulty. The important factor seems to be how heavily memory is loaded during l...

Research has shown that increasing the number of turns that a route takes through the environment increases estimates of distance--the route angularity effect. This study tested implications of different memory-based explanations of the route angularity effect within a virtual setting. Participants maneuvered through virtual pathways of varying length that included zero, two, or seven turns. Af...

In computational metrology one needs to compute whether an object satis es speci cations of shape within an acceptable tolerance. To this end positions on the object are measured, resulting in a collection of points in space. From this collection of points one wishes to extract information on atness, roundness, etc. of the object. In this paper we study one particular feature of objects, the an...

The “polyhedral product functor” produces a space from a simplicial complex L and a collection of pairs of spaces, {(A(i), B(i))}, where i ranges over the vertex set of L. We give necessary and sufficient conditions for the resulting space to be aspherical. There are two similar constructions, each of which starts with a space X and a collection of subspaces, {Xi}, where i ∈ {0, 1 . . . , n}, a...

BACKGROUND Commonly used techniques for achieving nasal tip projection and refinement are adequate for most primary rhinoplasty patients, but they may result in undesirable tip bifidity and visible lower lateral cartilage angularity, especially in patients with thin skin. OBJECTIVE We report the use of "like" local tissues, cephalic trim cartilage remnants of the lower lateral cartilages, as ...

Using contact dynamics simulations, we compare the effect of rolling resistance at the contacts in granular systems composed of disks with the effect of angularity in granular systems composed of regular polygonal particles. In simple shear conditions, we consider four aspects of the mechanical behavior of these systems in the steady state: shear strength, solid fraction, force and fabric aniso...

We describe a method for typing neurons into four progressive stages of ischemic deterioration based on visual characterization of the nucleus in terms of its optical contrast, delineation along the nuclear-cytoplasmic interface, and its shape. Difficulty in assessing nuclear shape required the introduction of an angularity comparator chart to improve the investigator's accuracy. Three investig...