Many high performance applications run well below the peak arithmetic performance of the underlying machine, with inefficiencies often attributed to poor memory system behavior. In the context of scientific computing we examine three emerging processors designed to address the wellknown gap between processor and memory performance through the exploitation of data parallelism. The VIRAM architec...

The performance of user-level messaging in PIM (Processing-InMemory) to PIM communication is modeled and analyzed for the DIVA (Data IntensiVe Architecture) system. Six benchmarks have been used for this purpose, two from each category, namely single message transfer, parallel transfer and collective communication, as described for the PMB (Pallas MPI Benchmarks). The benchmarks used are PingPo...

We propose an object detection algorithm which is efficient and fast enough to be used in (almost) real time with the limited computer capacities onboard satellites. For stars below the saturation limit of the CCD detectors it is based on a four neighbourhood local maximum criterion in order to find the centre of a stellar image. For saturated stars it is based on the assumption that the image ...

integration of memory on the same die as the processor (IRAM) has the potential to offer unprecedented bandwidth that can be exploited efficiently by vector processors. However, real-world scientific vector applications with their very large memory requirements and their poor locality, would easily overflow any single IRAM device. In this environment, traditional approaches such as caching or p...

The need to help people choose among large numbers of items and to filter through large amounts of information has led to a flood of research in construction of personal' recommendation agents. One of the central issues in constructing such agents is the representation and elicitation of user preferences or interests. This topic has long been studied in Decision Theory, but surprisingly little ...

When a speaker's auditory feedback is altered, he adapts for the perturbation by altering his own production, which demonstrates the role of auditory feedback in speech motor control. In the present study, we explored the role of auditory acuity and executive control in this process. Based on the DIVA model and the major cognitive control models, we expected that higher auditory acuity, and bet...

Three planned astrometry survey satellites, FAME, DIVA, and GAIA, all aim at observing magnitude-limited samples. We argue that substantial additional scientific opportunities are within the reach of these mission if they devote a modest fraction of their catalogs to selected targets that are fainter than their magnitude limits. We show that the addition of O(106) faint (R > 15) targets to the ...

BACKGROUND Myricaria consists of about twelve-thirteen species and occurs in Eurasian North Temperate zone, most species in the Qinghai-Tibet Plateau (QTP) and adjacent areas. METHODOLOGY/PRINCIPAL FINDINGS Twelve species of Myricaria plus two other genera Tamarix and Reaumuria in Tamaricaceae, were sampled, and four markers, ITS, rps16, psbB-psbH, and trnL-trnF were sequenced. The relaxed Ba...

IEEE Computer Graphics and Applications 49 Sound rendering 1 is analogous to graphics rendering when creating virtual auditory environments. In graphics, we can create images by calculating the distribution of light within a modeled environment. Illumination methods such as ray tracing and radiosity are based on the physics of light propagation and reflection. Similarly, sound rendering is base...

A new species of the new genus Keraia gen. nov. from the Guinea Basin is described in the present paper. The new taxon belongs to the Pseudomesochrinae Willen, 1996, which until now has contained only the genus Pseudomesochra T. Scott, 1902. Both genera are prevalent in the deep sea. Whereas Pseudomesochra reaches quite high individual and species numbers in the investigated samples of the DIVA...