检索结果-内蒙古大学图书馆

2006 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, ASHRAE

作者： Cader, Tahir Westra, Levi Regimbal, Kevin Mooney, Ryan High Performance Computing Group Isothermal Systems Research Liberty Lake WA MSCF Operations/EMSL Pacific Northwest Laboratory Richland WA

Electronics densification is continuing at an unrelenting pace at the server, rack, and facility levels. With increasing facility density levels, airflow management has become a major challenge and concern. Hot spots, air short-circuiting, and inadequate tile airflow are a few of the issues that are complicating airflow management. This paper focuses on a thermal management approach that simplifies facility airflow management in a cost-effective and efficient manner. Implementation of the technology was undertaken with the DOE 's Pacific Northwest National Laboratory. Under the effort, a single 8.2 kW rack of HP rx2600 servers was converted from air cooling to liquid cooling. The liquid-cooling solution employs spray modules that indirectly cool the processors and remove the processor heat load directly to the facility water and not the facility air. An infrared camera was used to measure the temperature distributions over the rear doors of the liquid-cooled rack and several air-cooled racks, as well as the internal areas of a liquid-cooled and an air-cooled server. A tile hood was also used to measure the airflow rate out of all of the perforated tiles in the data center. The air exiting an 8.2 kW air-cooled rack located in a best-case facility location reached a maximum of 34°C and the air exiting an air-cooled rack located in a worst-case location reached a maximum of 44°C, while the air exiting the liquid-cooled rack was 10°C to 20°C cooler, reaching a maximum of 24°C. The air is delivered to the tiles at approximately 14°C. The thermal gradient over the air-cooled racks approximated 10°C (hottest servers at the top), while that over the liquid-cooled rack was less than half and on the order of 3°C-4°C. The image of the internal areas of the air-cooled server showed some significant hot spots on the power pods and memory, while these were significantly diminished for the liquid-cooled server. The tile airflow measurements revealed that the vast majority of the t

关键词： Cooling systems

来源：评论

学校读者我要写书评

暂无评论

A 55 TFLOPS simulation of amyloid-forming peptides from yeast prion Sup35 with the special-purpose computer system MDGRAPE-3

A 55 TFLOPS simulation of amyloid-forming peptides from yeas...

引用

2006 ACM/IEEE Conference on Supercomputing, SC'06

作者： Narumi, Tetsu Ohno, Yousuke Okimoto, Noriaki Koishi, Takahiro Suenaga, Atsushi Futatsugi, Noriyuki Yanai, Ryoko Himeno, Ryutaro Fujikawa, Shigenori Taiji, Makoto Ikei, Mitsuru Intel K.K. High Performance Molecular Simulation Team Genomic Sciences Center Innovative Nanopatterning Laboratory Topochemical Design Laboratory Frontier Research System Advanced Center for Computing and Communication Software and Solutions Group Parallel and Distributed Solutions Group

ISBN: (纸本)0769527000

We have achieved a sustained performance of 55 TFLOPS for molecular dynamics simulations of the amyloid fibril formation of peptides from the yeast Sup35 in an aqueous solution. For performing the calculations, we used the MDGRAPE-3 system - -a special-purpose computer system for molecular dynamics simulations. Its nominal peak performance was 415 TFLOPS for Coulomb force calculations;this is the highest-ever performance reported for classical molecular dynamics simulations. Amyloid fibril formation is known to be related to the occurrence of severe diseases such as Alzheimer's, Parkinson's, and Creutzfeldt-Jakob diseases. The Sup35 protein is a "yeast prion protein," which forms mini-crystals due to aggregation;it forms an effective platform for studying the formation process of amyloid fibrils. In these simulations, we first elucidate that the amyloid-forming peptides GNNQQNY aggregate at a higher frequency than non-amyloid-forming peptides SQNGNQQRG;further, the GNNQQNY peptides tend to form parallel two-stranded -sheets that would grow into a cross- amyloid nucleus. The results are consistent with those obtained experimentally. Furthermore, we could observe an early elongation of the amyloid nucleus. This result is expected to contribute toward a deeper understanding of the amyloid growth mechanism. © 2006 IEEE.

关键词： Peptides

来源：评论

学校读者我要写书评

暂无评论

GridBeans: Supporting e-Science and grid applications

GridBeans: Supporting e-Science and grid applications

引用

e-Science 2006 - 2nd IEEE International Conference on e-Science and Grid computing

作者： Ratering, Ralf Lukichev, Alexander Vanni, A. Cacciari, C. Lanzarini, S. Bala, Piotr Riedel, Morris Mallmann, Daniel Benedyczak, K. Borcz, M. Kluszcynski, R. Ohme, Gert Software and Solutions Group Intel Corporation High Performance Computing Department CINECA Italy Interdiscipl. Center for Mathem. and Comp. Modelling Warsaw University Poland Central Institute of Applied Mathematics Research Centre Juelich Germany Faculty of Mathematics and Computer Science Torun Nicolaus Copernicus University Poland Solutions for Research T-Systems Corporation

ISBN: (纸本)0769527345

Large-scale scientific research often relies on the collaborative use of Grid and e-Science infrastructures that provide computational or storage related resources. One of the ideas of these modern infrastructures is to facilitate the routine interaction of scientists and their workflows with advanced problem solving tools and computational resources. While many production Grid projects and e-Science infrastructures have begun to offer services for the usage of resources to end-users during the past several years, the corresponding emerging standards defined by GGF and OASIS still appear to be in flux. In this paper, we present the GridBean technology that bridges the gap between the constantly changing basic Grid or e-Science infrastructures and the need of stable application development environments for the Grid users. © 2006 IEEE.

关键词： Grid computing

来源：评论

学校读者我要写书评

暂无评论

GridBeans: Support e-Science and Grid Applications

GridBeans: Support e-Science and Grid Applications

引用

IEEE International Conference on e-Science and Grid computing

作者： Ralf Ratering Alexander Lukichev Morris Riedel Daniel Mallmann A. Vanni C. Cacciari S. Lanzarini K. Benedyczak M. Borcz R. Kluszcynski Piotr Bala Gert Ohme Software and Solutions Group Intel Corporation USA Research Centre Juelich Central Institute of Applied Mathematics Germany High Performance Computing Department CINECA Italy Faculty of Mathematics and Computer Science Torun Nicolaus Copernicus University Poland Interdiscipl. Center for Mathem. and Comp Modelling Warsaw University of Technology Poland Solutions for Research T-Systems Corporation USA

关键词： Grid computing Web services Quantum computing Standards development Application software Mathematics high performance computing International collaboration Middleware Standards organizations

来源：评论

学校读者我要写书评

暂无评论

Nanoscale Hydrophobic Interaction and Nanobubble Nucleation

引用

Physical Review Letters 2004年第18期93卷 185701-185701页

作者： T. Koishi S. Yoo K. Yasuoka X. C. Zeng T. Narumi R. Susukita A. Kawai H. Furusawa A. Suenaga N. Okimoto N. Futatsugi T. Ebisuzaki Computational Sciences Division Advanced Computing Center RIKEN Wako Saitama 351-0198 Japan Department of Chemistry University of Nebraska Lincoln Nebraska 68588 USA Department of Mechanical Engineering Keio University Yokohama 223-8522 Japan High Performance Biocomputing Research Team Bioinformatics Group RIKEN Genomic Sciences Center Yokohama 244-0804 Japan

We report large-scale atomistic simulation of midrange nanoscale hydrophobic interaction, manifested by the nucleation of nanobubble between nanometer-sized hydrophobes at constrained equilibrium. When the length scale of the hydrophobes is greater than 2 nm, the nanobubble formation shows hysteresis behavior resembling the first-order transition. Calculation of the potential of mean force versus interhydrophobe distance provides a quantitative measure of the strength of the nanoscale hydrophobic interaction.

关键词： Nanostructured materials

来源：评论

学校读者我要写书评

暂无评论

Adaptive mesh refinement with high order finite difference schemes applied to direct numerical simulation

Adaptive mesh refinement with high order finite difference s...

引用

16th AIAA Computational Fluid Dynamics Conference 2003

作者： Borrel, Michel Ryant, Juliet Fluid Mechanics and Energetics Branch Computational Fluid Dynamics and Aeroacoustics Department O.N.E.R.A B.P. 72 92322 Châtillon cedex France Information Processing and Systems Branch Modeling and Information Processing Department High Performance Computing Group O.N.E.R.A B.P. 72 92322 Châtillon cedex France

ISBN: (纸本)9781624100864

The final objective of our work is to develop a finite difference, adaptive mesh refinement framework within which stand-alone existing high order or low order, finite difference combustion codes with more or less complex models can be integrated. ON-ERA had already developed a finite-volume, low order, adaptive mesh refinement, steady Euler code. The work we present here is the extension of this code to a high order, unsteady, finite-difference structure. © 2003 by Onera.

关键词： Mesh generation

来源：评论

学校读者我要写书评

暂无评论

Launching into the future of commodity cluster computing

Launching into the future of commodity cluster computing

引用

IEEE International Conference on Cluster computing

作者： T. Sterling High Performance Computing Group NASA Jet Propulsion Laboratory USA Center for Advanced Computing Research California Institute of Technology USA

Summary form only given. It is observed that once you've finally made it to the North Pole, no matter what direction your next step takes, you can't go anywhere but South. To some, it appears that Commodity Cluster computing is in somewhat of a similar position. Having firmly established itself as the leading approach to scalable high performance computing, commodity clusters such as Beowulf-class systems have no where to go. Yes, they will continue to track Moore's exponential growth in peak performance and storage capacity, and system software will become incrementally better But in terms of strategic advances, commodity clusters are largely corralled in a paradigm cul-de-sac. In some sense there is a kind of truth in this assessment: the fundamental premise of commodity clustering is invariant; Existing, i.e. predeveloped and standalone, systems (uninformatively referred to as "nodes") are integrated by means of a commercially available interconnect network and supporting software. However the flaw of this defeatist perspective is that the nodes look like more of the same, only faster The future of commodity cluster computing will be defined, not solely by Moore's Law, but by the revolutionary structures embodied by the nodes and the innovative ways in which they will be employed. This plenary presentation will explore the innovations in both hardware and software that are likely to drive the future of commodity cluster computing throughout the rest of this decade and toward the trans-Petaflops performance regime of performance. In so doing, we will examine current projections of device technology to anticipate the performance, capacity, power, size, and cost curves of future commodity clusters. Perhaps of more impact are the changes anticipated in hardware architecture including blade technology, system and SMP on a chip, processor in memory architecture, and anticipated advances in networking including Infiniband and optical switching. As new uses are found for

关键词： North Pole Hardware Costs Software tools Resource management high performance computing System software Moore's Law Technological innovation Software performance

来源：评论

学校读者我要写书评

暂无评论

An introduction to the gilgamesh PIM architecture 7

引用

7th European Conference on Parallel computing, Euro-Par 2001

作者： Sterling, Thomas Center for Advanced Computing Research California Institute of Technology and High Performance Computing Group NASA Jet Propulsion Laboratory United States

ISBN: (纸本)3540424954

Throughout the history of computer implementation, the technologies employed for logic to build ALUs and the technologies employed to realize high speed and high-density storage for main memory have been disparate, requiring different fabrication techniques. This was certainly true at the beginning of the era of electronic digital computers where logic was constructed from vacuum tubes and main memory was produced by wired arrays of magnetic cores. But it is also true with today’s conventional computing systems. Yes, both logic and memory are now fabricated with semiconductors. But the fabrication processes are quite different as they are optimized for very different functionality. CMOS logic pushes speed of active components while DRAM storage maximizes densityof passive capacitive bit cells. As a consequence of this technology disparity between the means of achieving distinct capabilities of memory and logic, computer architecture has been constrained by the separation of logical units and main memory units. The von Neumann bottleneck is the communication’s channel choke point between CPUs and main memory resulting from the separation imposed by these distinct device types. Much of modern microprocessor architecture is driven by the resulting data transfer throughput and latency of access due to this separation as well as the very different clock speeds involved. More subtle but of equal importance are the limitations imposed on the diversity of possible structures that might be explored and achieved were it feasible to bridge this gap and intertwine memory and logic.

关键词：

来源：评论

学校读者我要写书评

暂无评论

New approaches to spaceborne computing

New approaches to spaceborne computing

引用

1998 IEEE Aerospace Conference, AERO 1998

作者： Sterling, Thomas Kogge, Peter High Performance Computing Systems Group Jet Propulsion Laboratory Mail Stop 168-522 4800 Oak Grove Dr. PasadenaCA91109 United States Department of Computer Science and Engineering University of Notre Dame Notre DameIN46556 United States

ISBN: (纸本)0780343115

NASA's aggressive plans for extensive deep space exploration with a new generation of unmanned space craft requires a dramatic increase in responsibilities for onboard computing to reduce size, weight, and power to drastically reduce mission costs. No longer will all raw sensor data be transmitted back to Earth but rather only the results from extensive preprocessing to decrease total link capacity by one to three orders of magnitude. A new approach to on board data processing is necessitated by this new expanded mission requirement. Processor-In-Memory (PIM) architecture combines logic and memory on the same integrated circuit to permit direct access to memory row buffers, greatly increasing effective memory bandwidth, reducing overhead and latency, and improving power efficiency. Organizing and managing the resources of PIM based systems is challenging. The PIM-MT architecture is an innovative approach to harnessing the physical resources of PIM technology through a message driven multithreaded virtual execution model. This paper describes the concepts of PIM-MT and its role in future spaceborne computing. © 1998 IEEE.

关键词： NASA

来源：评论

学校读者我要写书评

暂无评论

New approaches to spaceborne computing

New approaches to spaceborne computing

引用

IEEE Conference on Aerospace

作者： T. Sterling P. Kogge Jet Propulsion Laboratory High Performance Computing Systems Group Pasadena CA USA Department of Computer Science and Engineering University of Notre Dame Notre Dame IN USA

关键词： Space exploration Power generation Space missions Costs Capacitive sensors Earth Data processing Logic circuits Bandwidth Delay

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：