In this paper, we study the problem of optimal matrix partitioning for parallel dense factorization on heterogeneous processors. First, we outline existing algorithms solving the problem that use a constant performance model of processors, when the relative speed of each processor is represented by a positive constant. We also propose a new efficient algorithm, called the Reverse algorithm, sol...

In this paper1 we show how a dense surface model of the human face can be built from a population of examples. A technique that combines active shape models (ASMs) with iterative closest point (ICP) can be used to fit the model to new faces. The model is built by aligning the surfaces using a sparse set of hand-placed landmarks, then using thinplate spline warping to make a dense correspondence...

Two electron-dense tracers, ferritin and lanthanum, have been administered to peripheral nerve fibres, and their uptake has been studied ultrastructurally. It was found that the perineurium was an effective barrier to ferritin in vivo, and the tracer was subsequently injected sub-perineurially. Ferritin uptake over a 120-min period was confined to occasional phagocytic vesicles in perineurial a...

ABSTRACT Infrared dark clouds (IRDCs) are potential hosts of the elusive early phases high mass star formation (HMSF). Here, we conduct an in-depth analysis fragmentation properties a sample 10 IRDCs, which have been highlighted as some best candidates to study HMSF within Milky Way. To do so, obtained set large mosaics covering these IRDCs with Atacama Large Millimeter/submillimeter Array (ALM...

We present the first systematic algorithm to estimate the maximum packing density of spheres when the grain sizes are drawn from an arbitrary size distribution. With an Apollonian filling rule, we implement our technique for disks in 2d and spheres in 3d. As expected, the densest packing is achieved with power-law size distributions. We also test the method on homogeneous and on empirical real ...

background: serological assay based on dense granular (gra) proteins of toxoplasma gondii (t. gondii) is actually the most popular laboratory diagnostic tool to detection of toxoplasmosis. we aimed to construct a recombinant gra7-ptz57rt plasmid vectors that it is suitable for sub-cloning and gra7 protein production. m aterials and methods: souris mice were used for maintaining of t. gondii tac...

Several methods have been proposed in the literature for the distribution of data on distributed memory machines, either oriented to dense or sparse structures. Many of the real applications, however, deal with both kind of data jointly. This paper presents techniques for integrating dense and sparse array accesses in a way that optimizes locality and further allows an efficient loop partitioni...

Several methods have been proposed in the literature for the local enumeration of dense references for arrays distributed by the CYCLIC(k) data-distribution in High Performance Fortran. These methods deal only with loops without any irregular references. However, existing techniques are not enough when the code includes sparse references. In this work, some methods for enumeration of references...

OBJECTIVES This retrospective observational study evaluated the distribution of dense breasts by age group among healthy Korean women. METHODS Participants were women aged 30 years and older who voluntarily underwent screening mammography between January 2007 and December 2011. Women who received the Breast Imaging Reporting and Data System for mammographic density of 3 or 4 were defined as h...