检索结果-内蒙古大学图书馆

Frontiers in Optics, FiO 2009

作者： Ou, Fang Li, Xiangyu Liu, Boyang Huang, Yingyan Khoo, Eng-Huat Li, Er-Ping Ahmed, Iftikhar Wang, Qian Ho, Seng-Tiong Department of Electrical Engineering and Computer Science Northwestern University Evanston IL 60208 United States Data Storage Institute 5 Engineering Drive 1 Singapore 11760 Singapore OptoNet Inc. Evanston IL 60201 United States Institue of High Performance Computing 1 Fusionopolis Connexis Singapore 138632 Singapore

We demonstrate single-directional output coupling of light from micro-resonator laser using a radially placed waveguide based on a new enhanced-radiation-loss output coupling mechanism. The 20μm-diameter electrically... 详细信息

ISBN: (纸本)9781557528780

关键词： Pumping (laser)

来源：评论

学校读者我要写书评

暂无评论

Scaling communication-intensive applications on BlueGene/P using one-sided communication and overlap

Scaling communication-intensive applications on BlueGene/P u...

引用

International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Rajesh Nishtala Paul H. Hargrove Dan O. Bonachea Katherine A. Yelick Computer Science Division College of Engineering University of California Berkeley Berkeley CA USA High Performance Computing Research Department Lawrence Berkeley National Laboratory Berkeley CA USA

In earlier work, we showed that the one-sided communication model found in PGAS languages (such as UPC) offers significant advantages in communication efficiency by decoupling data transfer from processor synchronization. We explore the use of the PGAS model on IBM BlueGene/P, an architecture that combines low-power, quad-core processors with extreme scalability. We demonstrate that the PGAS model, using a new port of the Berkeley UPC compiler and GASNet one-sided communication layer, outperforms two-sided (MPI) communication in both microbenchmarks and a case study of the communication-limited benchmark, NAS FT. We scale the benchmark up to 16, 384 cores of the BlueGene/P and demonstrate that UPC consistently outperforms MPI by as much as 66% for some processor configurations and an average of 32%. In addition, the results demonstrate the scalability of the PGAS model and the Berkeley implementation of UPC, the viability of using it on machines with multicore nodes, and the effectiveness of the BG/P communication layer for supporting one-sided communication and PGAS languages.

关键词： Electronics packaging Scalability high performance computing Power system modeling Parallel processing Large-scale systems Yarn Read-write memory Application software computer science

来源：评论

学校读者我要写书评

暂无评论

Data mining analysis to validate performance tuning practices for HPL

Data mining analysis to validate performance tuning practice...

引用

IEEE International Conference on Cluster computing

作者： Tuan Zea Tan Rick Siow Mong Goh Verdi March Simon See Institute of High Performance Computing Advanced Computing Singapore Asia-Pacific Science & Technology Center Sun MicroSystems Inc. India Department of Computer Science National University of Singapore Singapore Department of Mechanical & Aerospace Engineering Nanyang Technological University Singapore

Applications performance is a criterion for system evaluation, and hence performance tuning for these applications is of great interest. One such benchmark application is high performance Linpack (HPL). Although guidelines exist for HPL tuning, validating these guidelines on various systems is a challenging task as a large number of configurations need to be tested. In this work, we use data mining analysis to reduce the number of configurations to be tested in validating the HPL tuning guidelines on the Ranger System. We validate that NB, P and Q are the three most important parameters to tune HPL, and that PMAP does not have a significant impact on HPL performance. We also validate the practice of tuning HPL at small N using data mining analysis. We find that the value of N selected for tuning should not be significantly smaller than the largest N that can fit into the system memory. Our results indicate that data mining could be further applied to application performance tuning.

关键词： Data mining Data analysis performance analysis Application software Guidelines Benchmark testing Analytical models Thumb high performance computing Niobium

来源：评论

学校读者我要写书评

暂无评论

Information leakage detection in distributed systems using software agents

Information leakage detection in distributed systems using s...

引用

IEEE Symposium on Intelligent Agents, IA

作者： Yung-Chuan Lee Stephen Bishop Hamed Okhravi Shahram Rahimi Computer Information Specialist Department of Computer Science Southem Illinois University Carbondale IL USA Department of Computer Science Southem Illinois University Carbondale IL USA Information Trust Institute (ITI) and Center of Reliable and High-Performance Computing (CRHC Department of Electrical and Computer Engineering (ECE) University of Illinois Urbana-Champaign Urbana IL USA

Covert channel attacks utilize shared resources to indirectly transmit sensitive information to unauthorized parties. Current security mechanisms such as SELinux rely on tagging the filesystem with access control properties. However, such mechanisms do not provide strong protection against information laundering via covert channels. Colored Linux , an extension to SELinux, utilizes watermarking algorithms to ldquocolorrdquo the contents of each file with their respective security classification to enhance resistance to information laundering attacks. In this paper, we propose a mobile agent-based approach to automate the process of detecting and coloring receptive hosts' filesystems and monitoring the colored filesystem for instances of potential information leakage. Implementation details and execution results are included to illustrate the merits of the proposed approach.

关键词： Leak detection Software agents Information security Tagging Access control Mechanical factors Protection Linux Watermarking computerized monitoring

来源：评论

学校读者我要写书评

暂无评论

A sample identification and tracking system for biobanks

A sample identification and tracking system for biobanks

引用

Annual IEEE Symposium on computer-Based Medical Systems

作者： Atieh Zarabzadeh Farzad Hayati R. William G. Watson Geoff Bradley Jane Grimson Centre of Health Informatics Department of Computer Science Trinity College Dublin Ireland Department of Electronic Electrical & Computer Engineering University of Binningham UK UCD School of Medicine and Medical Science UCD Conway Institute of Biomolecular & Biomedical Research University College Dublin Ireland Trinity Centre of High Performance Computing Trinity College Dublin Ireland

The discovery of biomarkers and the underlying causes of diseases are enabled through the analysis of biological samples and data stored in biobanks. Biological samples and their associated data are expensive to collect and maintain, and it is important to store and manage them efficiently. During processing, samples and data go through a number of procedures and techniques, which are often in different locations and by individuals with different access permissions. It is essential to maintain the link between the samples and their associated data throughout the processes they undergo. This paper presents a novel system of tracking samples and data from collection through processing to storage and retrieval, which is based on Radio Frequency Identification (RFID) technology. This system ensures the security and reliability of sample data as well as location-independent recording and updating of sample data, as they move along the workflow.

关键词： Diseases Radiofrequency identification Educational institutions Information retrieval high performance computing User centered design Biomarkers Prostate cancer Biomedical informatics computer science

来源：评论

学校读者我要写书评

暂无评论

Stretchable silicon electronics and their integration with rubber, plastic, paper, vinyl, leather and fabric substrates

引用

MRS Online Proceedings Library 2009年第1期1196卷 1-7页

作者： Kim, Dae-Hyeong Kim, Yun-Soung Liu, Zhuangjian Song, Jizhou Kim, Hoon-Sik Huang, Yonggang Y. Rogers, John A. Departments of Materials Science and Engineering Beckman Institute and Frederick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana USA Institute of High Performance Computing Singapore Singapore Department of Mechanical and Aerospace Engineering University of Miami Coral Gables USA Departments of Civil and Environmental Engineering and Mechanical Engineering Northwestern University Evanston USA Departments of Chemistry Mechanical Engineering Electrical and Computer Engineering University of Illinois at Urbana-Champaign Urbana USA

Electronic systems that offer elastic mechanical responses to high strain deformations are of growing interest, due to their ability to enable new electrical, optical and biomedical devices and other applications whose requirements are impossible to satisfy with conventional wafer-based technologies or even with those that offer simple bendability. This paper describes materials and mechanical design strategies for classes of electronic circuits that offer extremely high flexibility and stretchability over large area, enabling them to accommodate even demanding deformation modes, such as twisting and linear stretching to ‘rubber-band’ levels of strain over 100%. The use of printed single crystalline silicon nanomaterials for the semiconductor provides performance in flexible and stretchable complementary metal-oxide-semiconductor (CMOS) integrated circuits approaching that of conventional devices with comparable feature sizes formed on silicon wafers. Comprehensive theoretical studies of the mechanics reveal the way in which the structural designs enable these extreme mechanical properties without fracturing the intrinsically brittle active materials or even inducing significant changes in their electrical properties. The results, as demonstrated through electrical measurements of arrays of transistors, CMOS inverters, ring oscillators and differential amplifiers, suggest a valuable route to high performance stretchable electronics that can be integrated with nearly arbitrary substrates. We show examples ranging from plastic and rubber, to vinyl, leather and paper, with capability for large area coverage.

关键词： electronic structure nanostructure devices

来源：评论

学校读者我要写书评

暂无评论

Analytical description of Ogston-regime biomolecule separation using nanofilters and nanopores

引用

Physical Review E 2009年第4期80卷 041911-041911页

作者： Zi Rui Li Gui Rong Liu Jongyoon Han Yuan Cheng Yu Zong Chen Jian-Sheng Wang Nicolas G. Hadjiconstantinou The Singapore-MIT Alliance EA-04-10 4 Engineering Drive 3 Singapore 117576 Singapore Center for ACES Department of Mechanical Engineering National University of Singapore Singapore 117576 Singapore Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Biological Engineering Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Institute of High Performance Computing Singapore 138632 Singapore Department of Pharmacy National University of Singapore Singapore 117543 Singapore Department of Physics National University of Singapore Singapore 117542 Singapore Mechanical Engineering Department Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA

We present a theoretical model describing Ogston (pore size comparable to or larger than the characteristic molecular dimension) sieving of rigid isotropic and anisotropic biomolecules in nanofluidic molecular filter arrays comprising of alternating deep and shallow regions. Starting from a quasi-one-dimensional drift-diffusion description, which captures the interplay between the driving electric force, entropic barrier and molecular diffusion, we derive explicit analytical results for the effective mobility and trapping time. Our results elucidate the effects of field strength, device geometry and entropic barrier height, providing a robust tool for the design and optimization of nanofilter/nanopore systems. Specifically, we show that Ogston sieving becomes negligible when the length of shallow region becomes sufficiently small, mainly due to efficient diffusional transport through the short shallow region. Our theoretical results are in line with experimental observations and provide important design insight for nanofluidic systems.

关键词： Biomolecules

来源：评论

学校读者我要写书评

暂无评论

A network bandwidth-ware job scheduling with dynamic information model for grid resource brokers

A network bandwidth-ware job scheduling with dynamic informa...

引用

3rd IEEE Asia-Pacific Services computing Conference, APSCC 2008

作者： Yang, Chao-Tung Leu, Fang-Yie Hu, Wen-Jen High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung City 40704 Taiwan

ISBN: (纸本)9780769534732

In this paper, we propose a resource broker, which providing a friendly interface for accessing available and appropriate resources via user credentials, is developed on a platform constructed by employing the Globus toolkit. This broker not only deploys a domainbased network information model and its dynamic version to measure network status by invoking Network Weather Service (NWS) on grid computing environments, but also uses the Ganglia and NWS tools to monitor resource status and network-related information. Based on the actual value of network bandwidth and preserving the advantages of our previous model, a network bandwidth-award job scheduling algorithm for grid resource brokerage is then developed for communication-intensive job execution. Furthermore, the network information and resource status collected are all up-to-date so that the resource broker can effectively match appropriate grid resources and users requests to improve execution.©2008 IEEE.

关键词： Scheduling algorithms

来源：评论

学校读者我要写书评

暂无评论

A peer-to-peer file resource sharing system for mobile devices

A peer-to-peer file resource sharing system for mobile devic...

引用

3rd International Conference on Grid and Pervasive computing Symposia/Workshops, GPC 2008

作者： Yang, Chao-Tung Chen, Chun-Jen Chen, Hung-Yen Hsu, Ching-Hsien High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung 40704 Taiwan Department of Computer Science and Information Engineering Chung Hua University Hsinchu 30013 Taiwan

ISBN: (纸本)9780769531779

In this paper, we present a peer-to-peer file sharing platform combined with Data Grid system for mobile devices. Facing the limit of network bandwidth and unstable signal strength in wireless network, wireless peer-to-peer architecture is now widely accepted as a new computing paradigm for wireless devices. In wireless P2P architecture, one can speedup parallel file transfer and enhance the communication stability by establishing multiple concurrent P2P connections. This paper mainly applies Data Grid system to deal with the problems of file location discovery and client certification. We propose an architecture that uses GridFTP protocol to establish a video sharing platform for mobile devices. Combined with data grid, the system can perform video analysis and classification upon on its computing resources, keeping the files in the newest state at all times. © 2008 IEEE.

关键词： Network architecture

来源：评论

学校读者我要写书评

暂无评论

Correction to "Eight times acceleration of geospatial data archiving and distribution on the grids"

引用

IEEE Transactions on Geoscience and Remote Sensing 2009年第8期47卷 2988-2988页

作者： Frank Z. Wang Na Helian Sining Wu Yike Guo Derek Yuhui Deng Lingkui Meng Wen Zhang Jon Crowcroft Jean Bacon Michael Andrew Parker Cambridge Cranfield High Performance Computing Facility Centre of Grid Computing Cranfield UK School of Computer Science University of Herfordshire Hatfield UK Department of Computing Imperial College London London UK EMC Corporation Hopkinton USA School of Remote Sensing and Information Engineering Wuhan University of China Wuhan China Computer Laboratory University of Cambridge Cambridge UK Cambridge Science Centre University of Cambridge Cambridge UK

In our paper [1], the name of one of the authors is incorrectly given. Included here also is the biography with the missing IEEE membership information.

关键词： Biographies Acceleration computer science Internet Technical field awards Remote sensing Biographies Physics computing Multimedia systems Machinery

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：