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International Conference on Grid and Cloud computing

作者： Li, Qiang Huo, Zhigang Sun, Ninghui National Research Center for Intelligent Computing Systems Beijing 100190 China Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9780769543130

Personal high performance computer (PHPC) requires lower cost and high performance. The Teraflops PHPC systems with special accelerator units like GPGPU have been presented, but they have difficulties in programming, compatibility and applicability. In this paper, we present HPP-PHPC, a hybrid architecture of heterogeneous processors connected by non-coherent off-chip system bus. The performance of HPP-PHPC is ensured by special processors integrated with vector units and high-efficiency interconnection between heterogeneous processors. And by the adoption of general processors and features like global physical address space and synchronization semantics in hardware, HPP-PHPC is more compatible and convenient for massage passing and PGAS programming model. Also it is more applicable to most applications, including those with many execution branches. Initial results obtained from our prototype system have proved our design. © 2010 IEEE.

关键词： Semantics

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Fast robotic compensation of spontaneous head motion during Transcranial Magnetic Stimulation (TMS)

Fast robotic compensation of spontaneous head motion during ...

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UKACC International Conference on CONTROL 2010

作者： Richter, Lars Matthäus, Lars Schlaefer, Alexander Schweikard, Achim Institute for Robotics and Cognitive Systems University of Lübeck Lübeck Germany Medical Robotics University of Lübeck Lübeck Germany Graduate School for Computing in Medicine and Life Sciences University of Lübeck Lübeck Germany

ISBN: (纸本)9781846000386

As Transcranial Magnetic Stimulation (TMS) is spreading fast in neurology and neuroscience, advanced techniques for TMS are required. A robotized system is used for precise and repeatable TMS. The system is based on a serial industrial robot and an infrared tracking system for permanent position tracing of the head. For enhanced precision, a motion compensation module counterbalances head motions during stimulation. This avoids rigid fixations of the patient and leads to increased convenience and significant stress reduction. The motion compensation deals with two main scenarios: While the robot approaches the target point, the trajectory has to be adapted when the head moves. Once the point is reached, the robot keeps the coil at the given target position relative to the head. For safe robot operations around the patient's head, a metric is used that restricts big joint changes. Furthermore, a running average is used to compensate jitter in the tracking measurements. As a specific extension of the motion compensation method for TMS, an online coil pose adaptation and a manual coil placement are integrated. Our results have shown that the motion compensation latency is about 110 ms. The associated compensation is about 200 ms. Hence, the original position relative to the head will be re-established within about 300 ms. Our recent clinical trials for rTMS have practically proved that the motion compensation method is sufficient for medical applications.

关键词： Motion compensation

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Fast robotic compensation of spontaneous head motion during Transcranial Magnetic Stimulation (TMS)

Fast robotic compensation of spontaneous head motion during ...

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UKACC International Conference on Control 2010

作者： Lars Richter Lars Matthäus Alexander Schlaefer Achim Schweikard Institute for Robotics and Cognitive Systems Graduate School for Computing in Medicine and Life Sciences University of Lübeck Lubeck Germany Medical Robotics Graduate School for Computing in Medicine and Life Sciences University of Lübeck Lubeck Germany

ISBN: (纸本)9781627481199

关键词： Motion compensation Transcranial Magnetic Stimulation Robotized TMS Head motion Medical robotics Tracking Online adaptation Motion compensation compensation method Head Driving head Robot Transcranial Magnetic Stimulation industrial robots Coils Fasting compensated neurology Jitter

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A context-aware ubiquitous learning environment for enhancing science inquiry ability of students via on-site device operating

A context-aware ubiquitous learning environment for enhancin...

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18th International Conference on Computers in Education, ICCE 2010

作者： Chu, Hui-Chun Hwang, Gwo-Jen Tsai, Chin-Chung Chen, Chieh-Yuan Kinshuk Department of Computer Science and Information Management Soochow University Taiwan Graduate Institute of Digital Learning and Education National Taiwan University of Science and Technology Taiwan Department of Information and Learning Technology National University of Tainan Taiwan School of Computing and Information Systems Athabasca University Canada

ISBN: (纸本)9789834251246

Enhancing science inquiry ability of students has been recognized to be one of the most important education issues nowadays. Although various simulation programs have been developed for training science knowledge and ability, several problems have been revealed in practical learning activities. One major problem is owing to the lack of experiences in practical applications for what have learned from the textbooks. To deal with this problem, this study presents a context-aware ubiquitous learning system that employs Radio Frequency Identification (RFID) technology to detect and examine real-world learning behaviors of students and provide personalized learning guidance accordingly. Experimental results from a science course of an elementary school show that this innovative approach is able to improve the learning achievements of students as well as enhance their learning motivation.

关键词： Students

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The influence of a low-level color or figure adaptation on a high-level face perception

The influence of a low-level color or figure adaptation on a...

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作者： Song, Miao Shinomori, Keizo Zhang, Shiyong Graduate School of Engineering Kochi University of Technology Kami-shi 782-8502 Japan Department of Computing and Information Technology Fudan University Chandan Road 220 Shanghai 200433 China Department of Information Systems Engineering Kochi University of Technology Kami-shi 782-8502 Japan

Visual adaptation is a universal phenomenon associated with human visual system. This adaptation affects not only the perception of low-level visual systems processing color, motion, and orientation, but also the perception of high-level visual systems processing complex visual patterns, such as facial identity and expression. Although it remains unclear for the mutual interaction mechanism between systems at different levels, this issue is the key to understand the hierarchical neural coding and computation mechanism. Thus, we examined whether the low-level adaptation influences on the high-level aftereffect by means of cross-level adaptation paradigm (i.e. color, figure adaptation versus facial identity adaptation). We measured the identity aftereffects within the real face test images on real face, color chip and figure adapting conditions. The cross-level mutual influence was evaluated by the aftereffect size among different adapting conditions. The results suggest that the adaptation to color and figure contributes to the high-level facial identity aftereffect. Besides, the real face adaptation obtained the significantly stronger aftereffect than the color chip or the figure adaptation. Our results reveal the possibility of cross-level adaptation propagation and implicitly indicate a high-level holistic facial neural representation. Based on these results, we discussed the theoretical implication of cross-level adaptation propagation for understanding the hierarchical sensory neural systems. Copyright © 2010 The Institute of Electronics, Information and Communication Engineers.

关键词： Color

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Simulation of a conductive shield plate for the focalization of transcranial magnetic stimulation in the rat

Simulation of a conductive shield plate for the focalization...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： Fernando Gasca Lars Richter Achim Schweikard Institute of Robotics and Cognitive Systems and the Graduate School for Computing in Medicine and Life Sciences University of Lübeck Germany Institute of Robotics and Cognitive Systems University of Lübeck Germany

Transcranial Magnetic Stimulation (TMS) in the rat is a powerful tool for investigating brain function. However, the state-of-the-art experiments are considerably limited because the stimulation usually affects undesired anatomical structures. A simulation of a conductive shield plate placed between the coil stimulator and the rat brain during TMS is presented. The Finite Element (FE) method is used to obtain the 3D electric field distribution on a four-layer rat head model. The simulations show that the shield plate with a circular window can improve the focalization of stimulation, as quantitatively seen by computing the three-dimensional half power region (HPR). Focalization with the shield plate showed a clear compromise with the attenuation of the induced field. The results suggest that the shield plate can work as a helpful tool for conducting TMS rat experiments on specific targets.

关键词： Coils Magnetic stimulation Attenuation Brain models Geometry Three dimensional displays

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Fast Fourier-Galerkin methods for first-kind logarithmic-kernel integral equations on open arcs

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Science China Mathematics 2010年第1期53卷 1-22页

作者： WANG Bo1,WANG Rui2 & XU YueSheng3,4,1Academy of Mathematics and systems Science,Chinese Academy of Sciences,Beijing 100190,China 2School of Information Science and Engineering,graduate University of the Chinese Academy of Sciences,Beijing 100190,China 3Department of Mathematics,Syracuse University,Syracuse,NY 13244,USA 4Department of Scientific computing and Computer Applications,Sun Yat-sen University,Guangzhou 510275,China 1. Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China2. School of Information Science and Engineering Graduate University of the Chinese Academy of Sciences Beijing 100190 China3. Department of Mathematics Syracuse University Syracuse NY 13244 USA4. Department of Scientific Computing and Computer Applications Sun Yat-sen University Guangzhou 510275 China

We propose a fully discrete fast Fourier-Galerkin method for solving an integral equation of the first kind with a logarithmic kernel on a smooth open arc,which is a reformulation of the Dirichlet problem of the Laplace equation in the *** optimal convergence order and quasi-linear complexity order of the proposed method are established.A precondition is *** this method with an efficient numerical integration algorithm for computing the single-layer potential defined on an open arc,we obtain the solution of the Dirichlet problem on a smooth open arc in the *** examples are presented to confirm the theoretical estimates and to demonstrate the efficiency and accuracy of the proposed method.

关键词： Dirichlet problem open arc singular boundary integral equations Fourier-Galerkin methods logarithmic potentials

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Energy-aware fault-tolerant clustering scheme for target tracking wireless sensor networks

Energy-aware fault-tolerant clustering scheme for target tra...

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International Symposium on Wireless Communication systems (ISWCS)

作者： Sania Bhatti Jie Xu Mohsin Memon School of Computing University of Leeds Leeds West Yorkshire UK Department of Computer science Graduate School of Systems and Information Engineering University of Tsukuba Japan

Over the last few years, the deployment of wireless sensor networks (WSNs) has been fostered in diverse applications. WSN has great potential for a variety of domains ranging from scientific experiments to commercial applications. Due to the deployment of WSNs in dynamic and unpredictable environments, these applications must have potential to cope with variety of faults. This paper proposes an energy-aware fault-tolerant clustering protocol for target tracking applications termed as the Fault-Tolerant Target Tracking (FTTT) protocol. The identification of redundant nodes (RNs) makes sensor node (SN) fault tolerance plausible and the clustering endorsed recovery of sensors supervised by a faulty cluster head (CH). The FTTT protocol intends two steps of reducing energy consumption: first, by identifying RNs in the network; secondly, by restricting the numbers of SNs sending data to the CH. Simulations validate the scalability and low power consumption of the FTTT protocol in comparison with LEACH protocol.

关键词： Wireless sensor networks Target tracking Fault tolerance Fault tolerant systems Tin Protocols Energy consumption

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Model Checking of a Target Tracking Protocol for Wireless Sensor Networks

Model Checking of a Target Tracking Protocol for Wireless Se...

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International Conference on Computer and Information Technology (CIT)

作者： Sania Bhatti Jie Xu Mohsin Memon School of computing University of Leeds Leeds West Yorkshire UK Department of Computer Science Graduate School of Systems and Information Engineering University of Tsukuba Japan

Dense collection of tiny Sensor Nodes (SNs), equipped with a variety of sensors are able to sense events, compute and communicate the estimations to the end user, form a distributed Wireless Sensor Network (WSN). The advances in WSNs have made it plausible to appraise critical aspects of object tracking WSNs that are continuous monitoring of object track and fault tolerance. This paper presents probabilistic performance evaluation of clustering, redundancy reduction, target tracking and fault tolerance phases of Fault-Tolerant Target Tracking (FTTT) protocol. This type of formal modeling with limited number of SNs helps to plan a scalable network with specific constraints related to the application, for example, object tracking quality, life time of the network, energy consumption, latency, QoS and network throughput.

关键词： Protocols Target tracking Probabilistic logic Analytical models Fault tolerance Fault tolerant systems Wireless sensor networks

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Supporting software process improvement in very small entities through a template-based guide

Supporting software process improvement in very small entiti...

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作者： Trujillo, Miguel Morales Ibarguengoitia, Guadalupe E. Pino, Francisco J. Piattini, Mario Graduate Science and Engineering Computing UNAM Mexico City Mexico IDIS Research Group Electronic and Telecommunications Engineering Faculty University of Cauca Popayán Colombia Alarcos Research Group Institute of Information Technologies and Systems University of Castilla-La Mancha Ciudad Real Spain

ISBN: (纸本)1891706268

When a VSE decides to implement a software process model, the first step is to choose a reference model that is appropriate to its working environment and possibilities, which must then be adjusted to its specific needs. We believe that it would be simpler to adapt the reference model to the needs of the VSE through the use of templates, which would permit the correct integration of the activities proposed in the model and of those that the company has already been carrying out, thus narrowing the gap between the chosen model and its adoption. This paper presents a template-based guide as an alternative through which to implement a process reference model. The templates are developed to capture and concentrate the results of the activities stated in the reference model, thus creating standardized products that meet the appropriate requirements needed to increase the companies' maturity and capability. In accordance with the activities recommended in the COMPETISOFT reference model, we propose templates as an alternative means of generating a product associated with each activity. The templates are made up of individual items - atomic template-units - each of which is supported by the Unified Process and PMBoK methodologies. Our intention is to incorporate the processes into the VSEs, with the support of templates that are manageable, easy and understandable, taking into account the inherent limitations of small businesses.

关键词： Process engineering

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