DIME is a programming environment for manipulation of irregular triangular meshes with a distributed memory machine. We have added a software layer DIMEFEM which manipulates Finite Element representations of functions and allows the stating and solving of variational statements. An application of DIMEFEM is an incompressible Navier-Stokes solver with a three-stage implicit time step, using quas...

There are clearly visible P-waves in most of the leads (Fig. 1). The P-waves are negative in leads DII, DIII and aVF. Hence, this is not a sinus rhythm. All the P-waves have the same morphology, constant PP interval at a rate of 210 beats per minute (bpm), with an isoelectric baseline between them. Therefore, the underlying rhythm is unifocal atrial tachycardia [1]. Lead DII shows 12P-waves, bu...

Convolutional kernels are basic and vital components of deep Convolutional Neural Networks (CNN). In this paper, we equip convolutional kernels with shape attributes to generate the deep Irregular Convolutional Neural Networks (ICNN). Compared to traditional CNN applying regular convolutional kernels like 3× 3, our approach trains irregular kernel shapes to better fit the geometric variations o...

The term irregular astigmatism is often applied to a distorted corneal topography, whereby two major meridians may not even be easily identified; in simple terms, it can be defined as an “unrefractable” eye. As a consequence, visual function can be severely affected. Conventional treatments are often insufficient and/or unsatisfactory. Spectacles may lead to intolerable aniseikonia, and contact...

We describe a hierarchical data structure for representing a digital terrain (height eld) which contains approximations of the terrain at diierent levels of detail. The approximations are based on triangulations of the underlying two-dimensional space using right-angled triangles. The methods we discuss allow the approximation to precisely represent the surface in certain areas while coarsely a...

We address the problem of designing compact data structures for encoding a Triangulated Irregular Network (TIN). In particular, we study the problem of compressing connectivity, i.e., the information describing the topological structure of the TIN, and we propose two new compression methods which have diierent purposes. The goal of the rst method is to minimize the number of bits needed to enco...