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Software Technologies for Future Dependable Distributed systems

作者： Junichi Ikeda Sayaka Akioka Yoichi Muraoka Department of Computer Science and Engineering Waseda University Tokyo Japan Graduate School of Information Systems University of Electro-Communications Tokyo Japan

ISBN: (纸本)9781424435654

Security market has been expanding steadily as people become more conscious about personal information management. On the other hand, administrators are competing with the flood of logs every day, and chasing for the updates on a new kind of attacks. Given the overwhelming tasks of administrators, it is extremely hard to keep the peace without the help of professionals such as hired system administrators and security analysts. In this paper, we propose an alarm annunciator to analyze system. We constructed the system that detects a large-scale brute-force attack and warns administrating PCs, as a prototype of the system that collects and analyzes logs, and alerts system administrators automatically. The alarm annunciator enables variety of domain administrators to manage their domains and servers with the minimum effort and expense.

关键词： Monitoring Security Computers Authentication Filtering Visualization Data mining

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Using a cluster as a memory resource: A fast and large virtual memory on MPI

Using a cluster as a memory resource: A fast and large virtu...

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IEEE International Conference on Cluster Computing

作者： Hiroko Midorikawa Kazuhiro Saito Mitsuhisa Sato Taisuke Boku Department of Computer and Information Science Seikei University Tokyo Japan Graduate School of Systems and Information Engineering University of Tsukuba Ibaraki Japan

The 64-bit OS provides ample memory address space that is beneficial for applications using a large amount of data. This paper proposes using a cluster as a memory resource for sequential applications requiring a large amount of memory. This system is an extension of our previously proposed socket-based distributed large memory system (DLM), which offers large virtual memory by using remote memory distributed over nodes in a cluster. The newly designed DLM is based on MPI (message passing interface) to exploit higher portability. MPI-based DLM provides fast and large virtual memory on widely available open clusters managed with an MPI batch queuing system. To access this remote memory, we rely on swap protocols adequate for MPI thread support levels. In experiments, we confirmed that it achieves 493 MB/s and 613 MB/s of remote memory bandwidth with the STREAM benchmark on 2.5 GB/s and 5 GB/s links (Myri-10G x2, x4) and high performance of applications with NPB and Himeno benchmarks. Additionally, this system enables users unfamiliar with parallel programming to use a cluster.

关键词： Memory management Kernel Application software Access protocols Yarn Bandwidth Hard disks Hardware Ethernet networks Information science

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Improving user's Web search experience by interactive re-ranking and zooming interfaces

Journal of Digital Information Management

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Journal of Digital Information management 2009年第1期7卷 35-43页

作者： Liu, Jianquan Chen, Hanxiong Furuse, Kazutaka Ohbo, Nobuo Department of Computer Science Graduate School of Systems and Information Engineering University of Tsukuba 1-1-1 Tennodai Tsukuba-shi Ibaraki-ken 305-8577 Japan

The well-known search engines such as Google, Yahoo! and MSN, are not enough for the advanced users who require user experience, for instance, much more correlative words, or interactive operations applied to returned results such as re-ranking and zooming. To focus on this idea of interactivity, we proposed and implemented interactive interfaces to improve user experience for supporting Web search. they are nice interfaces supporting dynamically changing re-ranking, related word zooming, and related word emphasizing and deemphasizing. It has been served as online search service recently. Our experimental evaluations confirm their convenience and good online performance.

关键词： Search engines

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Numerical Simulation of a DNA Sensor Based on the CNT-Gold Island Structure

Numerical Simulation of a DNA Sensor Based on the CNT-Gold I...

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International Workshop on Computational Electronics

作者： Gyu-sik Choe Jun-Myung Woo Young June Park Young Wook Chang Jeseung Oh Kyung-Hwa Yoo School of Electrical Engineering and Nano-Systems Institute(NSI-NCRC) Seoul National University Seoul South Korea Department of physics and Nanomedical graduate program Yonsei University Seoul South Korea

ISBN: (纸本)9781424439256

A numerical simulation has been performed for the DNA sensors based on the field-effect-transistor (FET) structure of a CNT with the gold island- attached on the CNT tube. The model uses the Poisson-drift-diffusion theory for the CNT transistor and considers the charge exchange between the interfaces between the CNT and gold island, gold and the linker molecules. In order to compare with experiments, an example device is simulated to predict the response of the sensor to the target DNA's in both the air and aqueous solution.

关键词： Numerical simulation DNA Gold FETs Joining processes Boundary conditions Electrostatics Poisson equations Charge carrier processes Electrodes

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On non-existence of Nash equilibrium of M person game with pure strategy for delivery services

On non-existence of Nash equilibrium of M person game with p...

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IEEE International Conference on Industrial engineering and engineering management

作者： K. Takahashi U. Sumita Corporate Planning Department Tokyo Gas Company Limited Tokyo Japan Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Japan

ISBN: (纸本)9781424448692

A competitive market model is considered with M suppliers and N customers, where each supplier provides a homogeneous service such as delivering propane gas cylinders and has to offer a uniform price upon delivery to all customers. Given a price upper bound U, the model is formulated as an M person game with pure strategy. It is shown that the M person game has the unique Nash equilibrium if and only if each customer can be serviced by at most one supplier. Furthermore, this unique Nash equilibrium is peculiar in that all suppliers adopt the same upper bound price U. In general, the M person game does not have any Nash equilibrium. For such a case, it is demonstrated that the suppliers continue to exercise their price strategies in a cyclic manner indefinitely.

关键词： Nash equilibrium Sufficient conditions Upper bound Strategic planning systems engineering and theory Engine cylinders Costs Context modeling

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Detection and segmentation of cervical cell cytoplast and nucleus

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International Journal of Imaging systems and Technology 2009年第3期19卷 260-270页

作者： Lin, Chuen-Horng Chan, Yung-Kuan Chen, Chun-Chieh Graduate School of Computer Science and Information Technology National Taichung Institute of Technology Taichung Taiwan Department of Management Information Systems National Chung Hsing University Taichung Taiwan Department of Electrical Engineering National Chung Hsing University Taichung Taiwan

This article aims to develop a method for the detection and segmentation of a cytoplast and nucleus from a cervix smear image. First, the technique of equalization method with Gaussian filter is adopted to eliminate noise in the image. Second, a new edge enhancement technique is proposed to work out the coarseness of each pixel, which is later used as a determining characteristic of reinforced object images. A two-group object enhancement technique is then used to reinforce this object according to rough pixels. Third, the proposed detector enhances the gradients of the edges of the cytoplast and nucleus while suppressing the noise gradients, and then specifies the pixels with higher gradients as possible edge pixels. Finally, it picks out the two longest closed curves constructed by part of the edge pixels. Detection and segmentation performance of the proposed method is later compared with seed region growing feature extraction and level set method using 10 cervix smear images as example. Besides comparing the contour segment of the cytoplast and nucleus obtained by using different methods, we also compare the quality of the segmentation results. Experimental results show that the proposed detector demonstrates an impressive performance. © 2009 Wiley Periodicals, Inc.

关键词： Edge detection

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New perspectives and applications of real-time fuzzy regression

New perspectives and applications of real-time fuzzy regress...

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IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Azizul Azhar Ramli Junzo Watada Witold Pedrycz Graduate School of Information Production and Systems Waseda University Fukuoka Japan Production System Department Graduate School of Information Production and Systems Waseda University Fukuoka Japan Systems Research Institute Polish Academy of Sciences Warsaw Poland Department of Electrical & Computer Engineering University of Alberta Edmonton AB Canada

Fuzzy regression is one of important methods for data analysis. Fuzzy regression extends the concept of classical regression which has been constructed in the statistical framework. We show that a convex hull method can provide a powerful tool to reduce the computing time, especially for real-time data analysis. The main objective of this study is to propose an efficient real-time fuzzy regression analysis based on the use of convex hull, specifically a Beneath-Beyond algorithm. The reconstruction of convex hull edges depends on incoming vertices while a recomputing procedure can be implemented in real-time. An air pollution data is analyzed by applying the proposed approach. An important role of convex hull is emphasized in particular when dealing with the limitations of linear programming.

关键词： Data analysis Regression analysis Production systems Air pollution Linear programming Image reconstruction Data engineering engineering management Biomedical imaging Psychology

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Time Series Mining Approach for Noninvasive Intracranial Pressure Assessment: An Investigation of Different Regularization Techniques

Time Series Mining Approach for Noninvasive Intracranial Pre...

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Computer Science and Information engineering, CSIE, WRI World Congress on FLAGGED

作者： Shaozhi Wu Peng Xu Shadnaz Asgari Marvin Bergsneider Xiao Hu Biomedical Engineering Graduate Program Henry Samueli School of Engineering and Applied Science University of California Los Angeles USA Neural Systems and Dynamics Laboratory Department of Neurosurgery the David Geffen School of Medicine University of California Los Angeles USA School of Computer Science and Engineering University of Electronic Science and Technology Chengdu China

A data mining framework has been proposed to estimate intracranial pressure (ICP) non-invasively in our previous work. In the corresponding approach, the feature vector extracted from arterial blood pressure (ABP) and flow velocity (FV) is translated to the estimated errors by the mapping function for each entry in the database. In this paper, three different mapping function solutions, linear least squares (LLS), truncated singular value decomposition (TSVD) and standard Tikhonov regularization (STR) are systemically tested to compare the possible effects of different solutions on the non-invasive ICP estimation. The conducted comparison demonstrated that the selection of mapping function solution actually influences the estimation. Among the tested three solutions for mapping function, TSVD and STR show better ICP estimation performance with smaller ICP errors than LLS.

关键词： Cranial pressure Data mining Biomedical engineering Data engineering Spatial databases Computer science Feature extraction Arterial blood pressure Biomedical measurements Laboratories

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A Novel Hybrid Trust management Framework for MANETs

A Novel Hybrid Trust Management Framework for MANETs

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International Conference on Distributed Computing systems Workshop

作者： Ruidong Li Jie Li Peng Liu Jien Kato National Institute of Information and Communications Technology Japan Graduate School of Systems and Information Engineering University of Tsukuba Japan School of Information Sciences and Technology Pennsylvania State University USA Department of Information Engineering University of Nagoya Japan

Mobile ad hoc network (MANET) is a promising network paradigm for the future networking. To secure a MANET, we focus on trust management framework, which is intended to cope with misbehavior problem of nodes and stimulate nodes to cooperate with each other. However, there are still many intrinsic problems with the existing trust management frameworks, which remain unsolved, such as frangibility under possible attacks. To design a robust trust management framework, we investigate these intrinsic problems with the existing frameworks, and propose a hybrid trust management framework (HTMF) to construct trust environment for MANETs in the paper. Performance evaluations also have been performed, which show that the proposed HTMF is more robust and reliable than the existing frameworks.

关键词： Robustness Mobile ad hoc networks Environmental management Performance evaluation Distributed computing Conference management Technology management engineering management Communications technology Electronic mail

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Local Transformation of Two Einstein-Podolsky-Rosen Photon Pairs into a Three-Photon W State

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Physical Review Letters 2009年第13期102卷 130502-130502页

作者： Toshiyuki Tashima Tetsuroh Wakatsuki Şahin Kaya Özdemir Takashi Yamamoto Masato Koashi Nobuyuki Imoto Graduate School of Engineering Science Osaka University Toyonaka Osaka 560-8531 Japan CREST Photonic Quantum Information Project 4-1-8 Honmachi Kawaguchi Saitama 331-0012 Japan Department of Electrical and Systems Engineering Washington University in St. Louis St. Louis Missouri 63130 USA

We propose and experimentally demonstrate a transformation of two Einstein-Podolsky-Rosen photon pairs distributed among three parties into a three-photon W state using local operations and classical communication. We then characterize the final state using quantum state tomography on the three-photon state and on its marginal bipartite states. The fidelity of the final state to the ideal W state is 0.778±0.043 and the expectation value for its witness operator is −0.111±0.043 implying the success of the proposed local transformation.

关键词： Photons

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