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Abnormality Detection Monitoring System for Elderly People in Sensing and Robotic Support Room

Abnormality Detection Monitoring System for Elderly People i...

引用

10th IEEE International Workshop on Advanced Motion Control (AMC'08), vol.1

作者： Hirokazu Seki Susumu Tadakuma Department of Electrical Electronics and Computer Engineering Faculty of Enfgineering Chiba Institute of Technology Narashino Chiba Japan

This paper describes an abnormal behavior detection system based on an omni-directional vision sensor as one of the important elements in realizing "Sensing and Robotic Support Room" for elderly people. Such support rooms are expected to be further developed in the future with the high performance to automatically recognize elderly people's actions and behavior patterns and detect the unusual patterns using some sensors and to support their daily motions using some robotic manipulator control systems. The proposed monitoring system using an omni-directional vision sensor automatically learns the daily behavior patterns and detects the unusual behavior patterns and actions using Bayesian Network approach. The Bayesian Network is constructed using image feature values such as the area and center-of gravity values extracted from the captured image sequence and the respective behavior patterns are represented as the conditional probabilities. Unusual behavior patterns can be automatically detected based on the low generation probability values. Some experiments based on the investigation of elderly people's typical daily behavior patterns show the effectiveness of the proposed system.

关键词： Behavior monitoring system Omni-directional vision sensor Abnormality detection Image processing Bayesian Network

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Performance Analysis of a System using Coordinate Interleaving and Constellation Rotation in Rayleigh Fading Channels

Performance Analysis of a System using Coordinate Interleavi...

引用

IEEE Conference on Vehicular technology (VTC)

作者： Nauman F. Kiyani Jos H. Weber Alenka G. Zajic Gordon L. Stuber Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technnology Delft Netherlands School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA

Diversity can play an important role in the performance improvement of a communication system in fading channels. The achievable performance with signal space diversity (SSD) is analyzed and a closed form expression for the upper bound of average probability of bit error (P b ) for M-ary phase shift keying (MPSK) in Rayleigh fading channel is presented. The problem of calculating P b of coherent MPSK over a Rayleigh fading channel has been studied previously in the literature. A solution based on the nearest neighbors was given. In this paper we show that the results with the nearest neighbor approximation represent an expurgated bound and are only valid for a small range of rotational angles. Exact pair-wise error probability (PEP) is derived for Rayleigh fading channels. It is shown that Gray signal constellation mapping is not necessarily the best option for a system employing coordinate interleaving and constellation rotation. Rotation angles are optimized by finding the minimum of the upper bound of P b . It is shown that the new derived bound is tight for the entire range of rotational angles at high signal-to-noise ratio. Furthermore, the performance of the system in case of phase estimation error is also investigated by simulations.

关键词： Constellation diagram Fading Artificial neural networks Phase shift keying Nearest neighbor searches Receivers Probability

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Driving Trajectory Generation of Electric Powered Wheelchair Using Spline Curve

Driving Trajectory Generation of Electric Powered Wheelchair...

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10th IEEE International Workshop on Advanced Motion Control (AMC'08), vol.2

作者： Yoshimasa Teruya Hirokazu Seki Susumu Tadakuma Department of Electrical Electronics and Computer Engineering Faculty of Enfgineering Chiba Institute of Technology Narashino Chiba Japan

This paper describes a novel smooth and stable driving trajectory generation scheme for electric powered wheelchair based on the third order spline curve. Electric powered wheelchair moved by the right and left electric motors based on the human's joystick input is expected to be widely used as a mobility support system for elderly people and disabled people. As one of the high performance control systems for the electric powered wheelchair, this paper proposes a real-time driving trajectory generation scheme to improve the ride quality and safety. The proposed system generates various driving trajectories with the spline curves based on the circle equations and the future passing positions are estimated using the turning radius circle equations. The human's intent from the joystick input can be well reflected in the driving trajectory such as the turning radius. The third order spline curve trajectory can be generated from four passing positions including one past passing position, one present position and two estimated future positions. Some simulation and experiment results show the effectiveness of the proposed control system.

关键词： Electric powered wheelchair Trajectory generation Spline curve Joystick

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Reduction of magnetizing inrush current in traction transformer

Reduction of magnetizing inrush current in traction transfor...

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International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT)

作者： K. P. Basu Stella Morris Faculty of Engineering Multimedia University Cyberjaya Malaysia Department of Electrical and Computer Engineering Manukau Institute of Technology New Zealand

In 25 kV ac main line traction system the traction transformer located in the engine are repeatedly switched off and on during the normal run of the train due to presence of neutral section in the contact wire. The transformer draws inrush current several times the full-load value. Its enegization creates severe power quality problem in each time. The inrush current may be reduced to the full-load value either by using point-on-wave switching device or by connecting an external resistor in series with the primary circuit. The resistor is shorted within a few cycles of energization of the transformer to avoid voltage drop and losses during the steady-state operation of the transformer. Simulation results illustrate the effect of voltage and frequency variation on the production of inrush current. Only one circuit breaker with a delayed contact closing may be used for resistance switching.

关键词： Surges Switching circuits Resistors Engines Wire Power quality Joining processes Steady-state Circuit simulation Frequency

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Panel session - pen-based computing in the engineering and science classroom: Implementation scenarios from three institutions

Panel session - pen-based computing in the engineering and s...

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Frontiers in Education (FIE) Conference

作者： Archana Chidanandan Pat Ferro Jeff Frolik Maki Hirotani Kathy Schmidt Deborah Walter Julia Williams Computer Science and Software Engineering Rose Hulman Institute of Technology Electrical and Computer Engineering University of Vermont Rose Hulman Institute of Technology Faculty Innovation Center Cockrell School of Engineering University of Technology Austin USA

As digital ink technology continues to make an impact on the technical classroom, faculty members are exploring the different strategies for using this technology to improve student learning. The purpose of this panel is to demonstrate how faculty members are implementing this technology in engineering and science classrooms at three different institutions: Rose-Hulman institute of technology, University of Texas at Austin, and University of Vermont. The panel is designed to show both experienced pen computing users and those who are new to the field the different ways this versatile technology may be employed. In addition to the demonstrations, the presenters will discuss the pedagogical implications that result from the implementations. faculty who are interested in both the pedagogy and assessment of pen-based computing in the classroom should find the session informative and useful.

关键词： Software Education computers Mobile communication Professional communication Book reviews Springs

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Evaluation of force delays on the operation of haptic sense

Evaluation of force delays on the operation of haptic sense

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Manabu Ishihara Shin-nosuke Suzuki Kenji Ohshima Jun Shirataki Department of Electrical and Computer Engineering Oyama National College of Technology Oyama Tochigi Japan Faculty of Engineering Kanagawa Institute of Technology Atsugi Kanagawa Japan

Recently, virtual reality (VR) technology has developed quickly, together with research conducted on various elemental and related technologies and research in various fields of its application. We experimented about the delay. The haptic media is very sensitive to the network delay and its jitter and packet loss. The AHP is one of methods to evaluate physical phenomena as correctness of the human sensation. In consequence of its application to the present experiment, it was made clear that the haptic media could be estimated from the delay times. An experiment was conducted using the AHP technique into the effect of feedback force delay on users by using the normal feedback force of a spring as an experimental model. The experiments in this study showed that there is a time delay threshold of 4 ms or more. In addition, when a thorough experiment was conducted in this range, it was found that humans could perceive a variation (difference threshold) in the delay of feedback force for a virtual spring that is between 4 ms and 5 ms.

关键词： Haptic interfaces Force feedback Delay effects Force control computer networks Humans Springs computer displays Jitter Delay estimation

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BBA: An Efficient Batch Bundle Authentication Scheme for Delay Tolerant Networks

BBA: An Efficient Batch Bundle Authentication Scheme for Del...

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IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference

作者： Haojin Zhu Xiaodong Lin Rongxing Lu Xuemin Shen Pin-Han Ho Department of Electrical and Computer Engineering University of Waterloo Canada Faculty of Business and Information Technology University of Ontario Institute of Technology (UOIT) Canada

To realize efficient in-transit messages (bundles) authentication in delay tolerant networks (DTNs), this paper introduces a novel batch bundle authentication (BBA) scheme to validate the bundles in a batch instead of authenticating them one by one. We take the advantage of identity based cryptography to dramatically reduce the transmission cost, and adopt batch signature technique to realize the efficient bundle signature verification. Compared with existing message authentication approaches, our scheme has the superiority on improved efficiency even under the invalid signature attack. Simulation results demonstrate that the proposed scheme can be an enhancement for current bundle security protocol specification.

关键词： Authentication Disruption tolerant networking Digital signatures Public key Handwriting recognition Telecommunication traffic Costs Propagation delay Routing Information technology

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Extensive use of advanced FPGA technology in digital design education

Extensive use of advanced FPGA technology in digital design ...

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2008 ASEE Annual Conference and Exposition

作者： Radu, Mihaela Cole, Clint Dabacan, Mircea Alexandru Sexton, Shannon Rose-Hulman Institute of Technology Department of Electrical and Computer Engineering Rose-Hulman Institute of Technology Terre Haute IN United States Washington State University Pullman United States Technical University of Cluj-Napoca Romania Technical University of Cluj-Napoca Faculty of Electronics Telecommunications and Information Technology Department of Applied Electronics Technical University of Cluj-Napoca Romania

The design tools, methods, and technologies used in industry to design digital hardware evolve quickly and continuously. Since the inception of wide-spread CAD tool use to define digital circuits around 40 years ago, revolutionary tool changes have occurred every 5 to 10 years. Although many of the foundational concepts are relatively unchanged, educational programs must nevertheless keep pace with technologies in common use in order to produce graduates who are competitive in the marketplace. A study conducted at Rose Hulman institute of technology measures changes in student performance when all students have unlimited access to state of the art design tools and hardware systems. Data are collected from surveys, exams, and course assignments such as project and lab reports. Quantitative data are analyzed by comparison to historical data gathered from student groups that did not have unlimited access to hardware systems, and qualitative data are used to determine the subjective quality of each student's experience. Specific outcomes include: assessing whether the overall learning process was improved;whether students have a better knowledge of modern technologies and design methods;whether their comprehension of founding concepts has improved or faltered. © American Society for engineering Education, 2008.

关键词： Students

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A Randomized Model for Communicating Embedded Systems

A Randomized Model for Communicating Embedded Systems

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2008 Mediterranean Conference on Control Automation, vol.4

作者： Marius C. Bujorianu Manuela L. Bujorianu University of Manchester Institute of Science and Technology UK Faculty of Electrical Engineering Mathematics and Computer Science University of Twente Enschede Netherlands

Nowadays, there is an intense research activity in designing systems that operate in real life, physical environments. This research is spanned by various areas in computer science and engineering: embedded systems, reactive systems, wireless communications, hybrid systems, stochastic processes, etc. A severe limitation in the development of these systems is due to the mathematical foundation and complexity of the physical environment. Often, the physical environment is continuous and uncertain, and modelled in terms of continuous stochastic processes. These mathematics are quite different from the underlying mathematics of discrete controllers based on logic and algebra. In this paper, we make further developments of Hilbertean formal methods, an integrated specification framework based with a rich algebraic semantics. This framework axiomatises and abstracts away advanced structures from functional and stochastic analysis. We integrate a probabilistic version of Pi-calculus to provide a rigorous framework for embedded systems with mobile and adaptive communication structure. The integration mechanism is based on partial ordered sets. The resulting framework has the modelling power of connectionist models like neural networks. Moreover, we construct an energy integral to every specification. The power of formal specification and stochastic analysis are combined in a rigorous mathematical framework for the software development of embedded systems. In this way, we achieve a new foundation for the multidimensional codesign.

关键词： Embedded systems Markov processes Picalculus Adaptive systems

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Tensor based image segmentation

Tensor based image segmentation

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Seminar on Neural Network Applications in electrical engineering

作者： Marko Jankovic Masashi Sugiyama Branimir Reljin Department of Computer Science Tokyo Institute of Technology Meguro Tokyo Japan Faculty of Electrical Engineering University of Belgrade Belgrade Serbia

In recent years spectral clustering has become on e of the most popular clustering algorithms. It is a simple yet powerful method for finding structure in data using spectral properties of an associated pairwise similarity matrix. It is simple to implement, can be solved efficiently by standard linear algebra software, and very often outperforms traditional clustering algorithms such as the k-means algorithm. In this paper we propose a new way of image segmentation based on specifically created similarity matrix and based on it, very simple segmentation algorithm. The algorithm is theoretically motivated and demonstrated on nontrivial examples.

关键词： Tensile stress Image segmentation Clustering algorithms Software algorithms Working environment noise Neural networks Software standards Linear algebra Clustering methods Mathematics

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