Abstract Crangonyx apalachee n. sp. Cannizzaro & Sawicki in Cannizzaro, Sisco Sawicki, is described from Lake Jackson Leon County, Florida, USA, a prairie lake that periodically drains through karst sinkholes during times of low rainfall. The new species occurs tall grass along the lake’s shoreline. Molecular analyses nuclear 18S rDNA and 28S with mitochondrial 16S rDNA, combined morphologi...

In studies of the articulation in speech data on the pharynx are scarce. Still, the pharynx is an important part of the vocal tract. The present paper reports on an attempt to use computer tomography for investigating the pharynx. Tomograms were taken at four levels in the pharynx of a male and a female subject sustaining the vowels /u, i, 0, oe/. From the tomograms the lateral width and the cr...

We present a method for estimating the distance between a camera and a human head in 2D images from a calibrated camera. Leading head pose estimation algorithms focus mainly on head orientation (yaw, pitch, and roll) and translations perpendicular to the camera principal axis. Our contribution is a system that can estimate head pose under large translations parallel to the camera’s principal ax...

A skeleton is a useful shape descriptor that encodes both boundary and region information for a given object. A widely used approach for skeletonization is to use a distance transform. Although many skeletonization algorithms have been developed, most methods involve the computation of high order derivatives and the evaluation of complex expressions. In this paper, we propose an algorithm that ...

We present a new type of Voronoi diagram in R that respects the anisotropy exerted on the plane by a given distance graph. It is based on a metric obtained by smoothly and injectively embedding R into R, and a scalar-valued function for re-scaling the distances. A spline representation of the embedding surface is constructed with the Gauß-Newton algorithm, which approximates the given distance ...

Abstract The presence of scattered prehistoric human bones in caves and sinkholes is common many regions Iberia. These are usually interpreted as erratic elements coming from burial contexts, collective associations. contexts very frequent karst areas the Iberian Peninsula since Early Neolithic, mostly Late Copper Age, while findings earlier chronologies much more unusual. In this work, we pres...

Subjects misjudge distances considerably when forced to rely on extra-retinal information. Nevertheless, they can reproducibly set a target to the same distance as a reference, or to double or half that distance, even when they have to look back and forth between them because they are prevented from seeing one when looking at the other. Our explanation for this apparent discrepancy is that peop...