Eines der Hauptziele des Applied Research Branch in der Numerical Aerodynamic Simulation (NAS) Systems Division am NASA Ames Research Center ist die beschleunigte Einfiihrung von parallelen Hochleistungsrechnern in ein produktionsorientiertes Rechenzentrum. In dieser Arbeit werden die Zielrichtungen des NAS Projekts in Bezug auf Parallelrechner dargestellt. Weiterhin werden die Erfahrungen mit ...

With the current popularity of cluster computing, the importance of understanding the capabilities and performance potential of the various network interconnects they use is growing. In this paper, we extend work done by other researchers by presenting the results of a performance analysis of multiple network interconnects running identical applications on identical cluster nodes. Repeated isol...

The objective of this report is to present our characterization of a shared-memory implementation of the NAS Parallel Benchmarks (NPB). This characterization is needed to support the design decisions of future shared-memory multiprocessors. This report presents two sets of characterization data; the rst set is the application characteristics that do not change from one hardware connguration to ...

In this paper we put forward an annotation system for specifying a sequence of data layout transformations for loop vectorization. We propose four basic primitives for data layout transformations that programmers can compose to achieve complex data layout transformations. Our system automatically modifies all loops and other code operating on the transformed arrays. In addition, we propose data...

Recent advances in low-end processor and network technology have made it possible to build a "supercomputer" out of commodity components. We develop simple models of the NAS Parallel Benchmarks version 2 (NPB 2) to explore the cost/performance trade-offs involved in building a balanced parallel computer supporting a scientific workload. We develop closed form expressions detailing the number an...

The NumaConnect cluster excels at both OpenMP and MPI computing within the same shared memory environment. No extra software or program modifications are needed to take advantage of the entire system. Results for the NASA Advanced Supercomputing (NAS) Parallel Benchmarks have set a new record for OpenMP core count and problem size. OpenMP results show good scalability, with best results coming ...

Objective: To evaluate nursing workload in an adult intensive care unit (ICU), and to describe the profile of patients admitted to that unit. Methods: A descriptive study using the Nursing Activities Score (NAS) for 33 days in an ICU with a capacity of 18 beds. Results: 574 observations were obtained from the registry of 107 patients, and the mean NAS score was 62.2%. Conclusion: The NAS is in ...

Nanocomposite of NiAl2O4/SiO2 (NAS) was prepared through insitu solgel reaction, in which NiAl2O4 nanocrystals were dispersed in the silica glassy matrix. The prepared dried NAS gel, at 338 K, was heat treated to different temperature and identified the temperature range (1083 – 1163 K) of the nanocomposite formation through XRD patterns. From XRD patterns, crystallite size of NiAl2O4 particles...

INTRODUCTION Renal safety is an important factor in selecting the most appropriate nucleos(t)ide analog (NA) treatment for patients with chronic hepatitis B (CHB). This systematic literature review and network meta-analysis aimed to assess renal function associated with telbivudine treatment compared to other NAs in patients with CHB. METHODS A systematic literature search via Medline, Medlin...

PURPOSE Within a family medicine residency, an outpatient buprenorphine treatment program was provided for pregnant women who were dependent on opioids. The purpose of this study was to investigate the outcomes of infants who were exposed to a range of doses of buprenorphine in utero and to determine how closely observed maternal/fetal outcomes (eg, method of delivery and infants requiring trea...