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International Workshop on Emerging Trends in FLOSS Research and Development (FLOSS)

作者： Hyrum K. Wright Dewayne E. Perry Empirical Software Engineering Laboratory Department of Electrical and Computer Engineering University of Texas Austin Austin TX USA

ISBN: (纸本)9781424437207

In June 2008, the Subversion development team released Subversion 1.5.0. This release contained a number of new features, but arrived only after a long and difficult development, test and release cycle. This protracted process confused and frustrated both users and developers. In this paper, we discuss the events which led to this breakdown, how the release process is being improved, and what lessons other open source projects can learn from the Subversion community's mistakes.

关键词： Testing computer crime Project management software engineering Laboratories Electric breakdown History Control systems Aging computer hacking

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A 1.3pJ/b inductive coupling transceiver with adaptive gain control for Cm-range 50Mbps data communication

A 1.3pJ/b inductive coupling transceiver with adaptive gain ...

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IEEE Asian Conference on Solid-State Circuits (ASSCC)

作者： Seulki Lee Jerald Yoo Kiseok Song Hoi-Jun Yoo Semiconductor System Laboratory Department of Electrical Engineering and Computer Science KAIST Daejeon South Korea

A 1.3 pJ/b inductive coupling transceiver is proposed for Cm-range multimedia data transmission in mobile device applications. Its transmission time control (TTC) scheme and adaptive gain control (AGC) scheme reduce the energy consumption below to 1.3 pJ/b. Inductor with self-resonance frequency above 200 MHz achieves the data rate over 50 Mbps. The receiver sensitivity can be enhanced to increase the communication distance up to 7 cm by relative magnitude comparison between two nodes of the receiver inductor. The transceiver consumes only 65 ¿W in total with 1 V supply.

关键词： Transceivers Programmable control Adaptive control Gain control Data communication Couplings Inductors Communication system control Energy consumption Frequency

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A Micro-FT-UART for Safety-Critical SoC-Based Applications

A Micro-FT-UART for Safety-Critical SoC-Based Applications

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International Conference on Availability, Reliability and Security, ARES

作者： Mohammad-Hamed Razmkhah Seyed Ghassem Miremadi Alireza Ejlali Dependable System Laboratory (DSL) Department of Computer Engineering Sharif University of Technology Tehran Iran

This paper presents the design of a fault-tolerant universal asynchronous receiver transmitter (UART) called micro-FT-UART for safety-critical SoC-based applications. This UART exploits advantages of three fault-tolerant techniques to tolerate soft errors. The three techniques are triple modular redundancy (TMR), Hamming code and a new technique called correction by parity storing (CPS). An VHDL model of a micro-UART is simulated by the ModelSim v.6.0 and synthesized by the Synopsys Design Compiler v.X-2005.09-SP2. About 1000 single-bit errors and 1000 multiple-bit errors are injected into different parts of the micro-UART to find out the error sensitivity of each specific part. Considering tradeoff between reliability and power consumption, an optimum fault-tolerant technique is assigned to each part to design the micro-FT-UART. This UART corrects all single-bit errors and on average 24% of multiple-bit errors with about 81% power consumption overhead and 152% area overhead.

关键词： Circuit faults Transmitters Energy consumption Error correction Power system transients system-on-a-chip Application software Fault tolerant systems Fault tolerance Redundancy

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A Novel SET/SEU Hardened Parallel I/O Port

A Novel SET/SEU Hardened Parallel I/O Port

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IEEE Circuits and systems International Conference on Testing and Diagnosis, ICTD

作者： Mohammad-Hamed Razmkhah Seyed Ghassem Miremadi Alireza Ejlali Mahdi Fazeli Dependable System Laboratory (DSL) Department of Computer Engineering Sharif University of Technology Tehran Iran

The continuous decrease in CMOS technology feature size increases the susceptibility of such circuits to single event transient SET and single event upset SEU, caused by energetic particles striking system wires and flip flops. This paper presents a novel SET/SEU-detection technique for I/O ports where different sampling times used to detect the effects of SET/SEUs. The power dissipation, area, reliability, and propagation delay of the SET/SEU-detection I/O port are analyzed by HSPICE v.X-2005.v9 simulation. The results show that this I/O port can detect all SET/SEUs, by consumption of about 113% more power and occupation of 145% more area than simple I/O port.

关键词： Single event upset Embedded system Phase detection CMOS technology Power system reliability Circuit faults Sampling methods Propagation delay Sensor systems Actuators

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P2P-Tuple: Towards a Robust Volunteer Computing Platform

P2P-Tuple: Towards a Robust Volunteer Computing Platform

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IEEE International Conference on Parallel and Distributed Computing, Applications and Technologies (PDCAT)

作者： Lei Ni Aaron Harwood Department of Computer Science and Software Engineering University of Melbourne Australia NICTA Victoria Research Laboratory Australia

The evolution of emerging volunteer computing systems is placing an ever greater emphasis on the use of a loosely coupled decentralized architecture, mainly to address concerns of scalability and robustness. We propose to build the next generation volunteer computing systems on top of well studied peer-to-peer techniques to fully take advantage of its decentralized characteristic and its very large, shared data storage capacity. This paper sketches the design of such a completely decentralized and fault tolerant volunteer computing system by using a peer-to-peer based tuple space formed by volunteer peers. Both simulation and software prototype evaluation results show support for the proposed design even when all peers are having a high churn rate of Mean Time Before Failure of 2 hours.

关键词： Robustness Peer to peer computing Virtual colonoscopy Network servers Distributed computing computer architecture Concurrent computing Aggregates Bandwidth File servers

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A robotic micro-assembly process inspired by the construction of the ancient pyramids and relying on several thousand flagellated bacteria acting as micro-workers

A robotic micro-assembly process inspired by the constructio...

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2009 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Sylvain Martel Mahmood Mohammadi NanoRobotics Laboratory Department of Computer and Software Engineering École Polytechnique de Montréal Montreal Canada

Bacteria can be used as computer-controlled bioactuators and means of propulsion for microrobots and other micro-scaled entities to accomplish precise operations as first proposed by our research group in [1] and demonstrated later experimentally in [2]. The last reference confirmed that the propulsion force provided by the flagella being connected to molecular motors embedded in the bacterial cell, could be exploited to replace more conventional technologies being presently used in robotics but which could not be implemented at such a scale. In a coherent effort, our group also pioneered a method of not only harnessing instead of mimicking nature by using flagellated bacteria and more specifically Magnetotactic Bacteria (MTB) for propulsion and transport, but also for the controlled steering or computerized directional swimming control of bacterial micronanorobots [3].

关键词： Microorganisms Propulsion Nanobioscience Magnetic field induced strain Microscopy Electromagnets Intelligent robots Earth Magnetic fields USA Councils

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Offer-based scheduling of deadline-constrained Bag-of-Tasks applications for utility computing systems

Offer-based scheduling of deadline-constrained Bag-of-Tasks ...

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International Symposium on Parallel and Distributed Processing (IPDPS)

作者： Marco A. S. Netto Rajkumar Buyya Grid Computing and Distributed Systems Laboratory Department of Computer Science and Software Engineering University of Melbourne Australia

Metaschedulers can distribute parts of a bag-of-tasks (BoT) application among various resource providers in order to speed up its execution. When providers cannot disclose private information such as their load and computing power, which are usually heterogeneous, the metascheduler needs to make blind scheduling decisions. We propose three policies for composing resource offers to schedule deadline-constrained BoT applications. Offers act as a mechanism in which resource providers expose their interest in executing an entire BoT or only part of it without revealing their load and total computing power. We also evaluate the amount of information resource providers need to expose to the metascheduler and its impact on the scheduling. Our main findings are: (i) offer-based scheduling produces less delay for jobs that cannot meet deadlines in comparison to scheduling based on load availability (i.e. free time slots); thus it is possible to keep providers' load private when scheduling multi-site BoTs; and (ii) if providers publish their total computing power they can have more local jobs meeting deadlines.

关键词： Processor scheduling computer applications Job shop scheduling Grid computing Cloud computing Application software Information resources Delay Biological system modeling Message passing

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Effective treatment of chronic radiation proctitis using radiofrequency ablation

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Therapeutic Advances in Gastroenterology 2009年第3期2卷 149-156页

作者： Zhou, Chao Adler, Desmond C. Chen, Yu Tsai, Tsung-Han Fujimoto, James G. Becker, Laren Figueiredo, Marisa Mashimo, Hiroshi Schmitt, Joseph M. Department of Electrical Engineering and Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA United States VA Boston Healthcare System Harvard Medical School MA United States LightLab Imaging Inc. Westford MA United States

Endoscopic argon plasma coagulation and bipolar electrocautery are currently preferred treatments for chronic radiation proctitis, but ulcerations and strictures frequently occur. Radiofrequency ablation (RFA) has been successful for mucosal ablation in the esophagus. Here we report the efficacy of RFA with the BarRx Halo⁹⁰ system in three patients with bleeding from chronic radiation proctitis. In all cases, the procedure was well tolerated and hemostasis was achieved after 1 or 2 RFA sessions. Re-epithelialization of squamous mucosa was observed over areas of prior hemorrhage. No stricturing or ulceration was seen on follow-up up to 19 months after RFA treatment. Real-time endoscopic optical coherence tomography (EOCT) visualized epithelialization and subsurface tissue microvasculature pre- and post-treatment, demonstrating its potential for follow-up assessment of endoscopic therapies. © 2009, SAGE Publications. All rights reserved.

关键词： Chronic radiation proctitis Endoscopic optical coherence tomography (EOCT) Endoscopic therapy Lower gastrointestinal bleeding Radiofrequency ablation (RFA)

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GPU support for batch oriented workloads

GPU support for batch oriented workloads

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： Lauro B. Costa Samer Al-Kiswany Matei Ripeanu Net System Laboratory Electrical and Computer Engineering Department University of British Columbia Vancouver BC Canada

This paper explores the ability to use graphics processing units (GPUs) as co-processors to harness the inherent parallelism of batch operations in systems that require high performance. To this end we have chosen bloom filters (space-efficient data structures that support the probabilistic representation of set membership) as the queries these data structures support are often performed in batches. Bloom filters exhibit low computational cost per amount of data, providing a baseline for more complex batch operations. We implemented BloomGPU a library that supports offloading bloom filter support to the GPU and evaluate this library under realistic usage scenarios. By completely offloading Bloom filter operations to the GPU, BloomGPU outperforms an optimized CPU implementation of the bloom filter as the workload becomes larger.

关键词： Filters Data structures Multicore processing Resonance light scattering Libraries computer architecture Concurrent computing Coprocessors Parallel processing High performance computing

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Detecting abnormal trend evolution over multiple data streams

Detecting abnormal trend evolution over multiple data stream...

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Joint International Conference on Advances in Data and Web Management, APWeb/WAIM 2009

作者： Zhang, Chen Weng, Nianlong Chang, Jianlong Zhou, Aoying Department of Computer Science and Engineering Fudan University CHN China ShangHai Stock Exchange CHN China ShangHai Telecom Company CHN China Software Engineering Institute of East China Normal University CHN China Shanghai Key Laboratory of Trustworthy Computering CHN China

ISBN: (纸本)9783642006715

In this paper, we present a method to trace evolution of trend over multiple data streams and detect the abnormal ones. First of all, a definition of trend for single data stream is provided, the advantage of our definition lies in its low time and space cost. Second, we improve a SVD-based method in order to select a pair of optimal initial parameters, then a novel chessboard named sketch is also illustrated aim at adjusting the parameters dynamically. Then, utilizing the skewness of trend distribution, an anomaly detection strategy is briefly introduced. Finally, we implement experiment on a variety of real data sets to illustrate effectiveness and efficiency of our approach. © Springer-Verlag Berlin Heidelberg 2009.

关键词： Artificial intelligence

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