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Threshold authenticated key configuration scheme based on multi-layer clustering in mobile ad hoc

APWeb 2006 International Workshops: XRA, IWSN, MEGA, and ICSE

作者： Lee, Keun-Ho Han, Sang-Bum Suh, Heyi-Sook Hwang, Chong-Sun Lee, Sangkeun Department of Computer Science and Engineering Korea University 5-ga Anam-dong Sungbuk-gu Seoul 136-701 Korea Republic of Ministry of Education and Human Resources Development Information Technology 77-6 Sejong-ro Jongro-gu Seoul 110-760 Korea Republic of

ISBN: (纸本)3540311580

In this paper, we describe a secure cluster-routing protocol based on clustering scheme in ad hoc networks. This work provides scalable, threshold authentication scheme in ad hoc networks. We present detailed security threats against ad hoc multi-layer routing protocols. Our proposed protocol designs an end-to-end authentication protocol that relies on mutual trust between nodes in other clusters. The scheme strategy takes advantage of threshold authenticated key configuration in large ad hoc networks. We propose an authentication scheme that uses certificates containing an asymmetric key using the threshold cryptography scheme, thereby reducing the computational overhead and successfully defeating all identified attacks. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Mobile telecommunication systems

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Collaborative coupling over tabletop displays 06

Collaborative coupling over tabletop displays

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CHI 2006: Conference on human Factors in Computing Systems

作者： Tang, Anthony Tory, Melanie Po, Barry Neumann, Petra Carpendale, Sheelagh Human Communication Technologies Lab. University of British Columbia 2366 Main Mall Vancouver BC V6T 1Z4 Canada Department of Computer Science University of British Columbia 2366 Main Mall Vancouver BC V6T 1Z4 Canada Department of Computer Science University of Calgary 2500 University Dr. NW Calgary Alta. T2N 1N4 Canada

ISBN: (纸本)1595931783

Designing collaborative interfaces for tabletops remains difficult because we do not fully understand how groups coordinate their actions when working collaboratively over tables. We present two observational studies of pairs completing independent and shared tasks that investigate collaborative coupling, or the manner in which collaborators are involved and occupied with each other's work. Our results indicate that individuals frequently and fluidly engage and disengage with group activity through several distinct, recognizable states with unique characteristics. We describe these states and explore the consequences of these states for tabletop interface design. Copyright 2006 ACM.

关键词： human computer interaction

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A study on vision-based robust hand-posture recognition by learning similarity between hand-posture and structure

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2nd International Conference on Natural Computation, ICNC 2006

作者： Hyoyoung, Jang Jin-Woo, Jung Zeungnam, Bien Department of Electrical Engineering and Computer Science KAIST 373-1 Guesong-dong Yuseong-gu Daejeon 305-701 Korea Republic of Human-Friendly Welfare Robot System Research Center KAIST 373-1 Guesong-dong Yuseong-gu Daejeon 305-701 Korea Republic of

ISBN: (纸本)3540459073

This paper proposes a robust hand-posture recognition method by learning similarity between hand-posture and structure for the performance improvement of vision-based hand-posture recognition. The difficulties in vision-based hand-posture recognition lie in viewing direction dependency and self-occlusion problem due to the high degree-of-freedom of human hand. General approaches to deal with these problems include multiple camera approach and methods of limiting the relative angle between cameras and the user's hand. In the case of using multiple cameras, however, fusion techniques to induce the final decision should be considered. Limiting the angle of user's hand restricts the user's freedom. The proposed method combines angular features and appearance features to describe hand-postures by a two-layered data structure and includes learning the similarity between the two types of features. The validity of the proposed method is evaluated by applying it to the hand-posture recognition system using three cameras. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Gesture recognition

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Real-time haptic incision simulation using FEM-based discontinuous free form deformation 06

Real-time haptic incision simulation using FEM-based discont...

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SPM 2006 - ACM Symposium on Solid and Physical Modeling

作者： Sela, Guy Subag, Jacob Lindblad, Alex Albocher, Dan Schein, Sagi Elber, Gershon Department of Computer Science Technion - Israel Institute of Technology Haifa 32000 Israel Human Interface Technology Lab. University of Washington PO Box 352142 Seattle WA 98195-2142 United States Department of Civil and Environmental Engineering University of Washington PO Box 352700 Seattle WA 98195-2700 United States

ISBN: (纸本)1595933581

computer-aided surgical simulation is a topic of increasingly extensive research. computer graphics, geometric modeling and finite-element analysis all play major roles in these simulations. Furthermore, real-time response, interactivity and accuracy are crucial components in any such simulation system. A major effort has been invested in recent years to find ways to improve the performance, accuracy and realism of existing systems. In this paper, we extend the work of [Sela et al. 2004], in which we used Discontinuous Free Form Deformations (DFFD) to artificially simulate real-time surgical operations. The presented scheme now uses accurate data from a Finite-Element Model (FEM), which simulates the motion response of the tissue around the scalpel, during incision. The data is then encoded once into the DFFD, representing the simulation over time. In real-time, The DFFD is applied to the vertices of the surface mesh at the actual incision location and time. The presented scheme encapsulates and takes advantage of both the speed of the DFFD application, and the accuracy of a FEM. In addition, the presented system uses a haptic force feedback device in order to improve realism and ease of use. © 2006 ACM.

关键词： Real time systems

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Redefining engineering mathematics education at Wright State University

Redefining engineering mathematics education at Wright State...

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113th Annual ASEE Conference and Exposition, 2006

作者： Klingbeil, Nathan Mercer, Richard Rattan, Kuldip Raymer, Michael Reynolds, David Wright State University United States Department of Mechanical and Materials Engineering Wright State University United States Department of Mathematics and Statistics Wright State University United States Department of Electrical Engineering Wright State University United States Department of Computer Science and Engineering Wright State University United States Department of Biomedical Industrial and Human Factors Engineering Wright State University United States

This paper summarizes progress to date on the WSU model for engineering mathematics education, an NSF funded curriculum reform initiative at Wright State University. The WSU model seeks to increase student retention, motivation and success in engineering through application-driven, just-in-time engineering math instruction. The WSU approach begins with the development of a novel freshman-level engineering mathematics course (EGR 101). Taught by engineering faculty, the course includes lecture, laboratory and recitation components. Using an application-oriented, hands-on approach, the course addresses only the salient math topics actually used in a variety of core engineering courses. These include the traditional physics, engineering mechanics, electric circuits and computer programming sequences. The EGR 101 course replaces traditional math prerequisite requirements for the above core courses, so that students can advance in the engineering curriculum without having completed a traditional freshman calculus sequence. This has enabled a significant restructuring of the engineering curriculum, including the placement of formerly sophomore-level engineering courses within the freshman year. The WSU model concludes with the development of a revised engineering mathematics sequence, to be taught by the math department later in the curriculum. The result has shifted the traditional emphasis on math prerequisite requirements to an emphasis on engineering motivation for math, with a just-in-time placement of the new math sequence. The current paper summarizes the motivation, goals and development to date of the WSU model, which is currently in its first year of implementation. The paper reflects modifications since the approach was first reported one year ago, and includes a preliminary assessment of student performance and perception during the first run of EGR 101. © American Society for Engineering Education, 2006.

关键词： Engineering education

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A Behavior Study of the Effects of Visual Feedback on Motor Output

A Behavior Study of the Effects of Visual Feedback on Motor ...

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

作者： Wensheng Hou Jun Zheng Yingtao Jiang Shan Shen Annette Sterr Andre J. Szameitat Monique van Loon Department of Biomedical Engineering Chongqing University Chongqing China Computer Science Department Queen's College City University of New York Flushing NY USA Department of Electrical and Computer Engineering University of Nevada Las Vegas NV USA Psychology Department School of Human Science University of Surrey Guildford Surrey UK

Visual feedback is a crucial factor that impacts the motor function, and a number of parameters, such as gain, delay and frequency, all play a role in regulating the motor output. In this paper, we conduct a behavioral study on 12 volunteers to determine the effects of visual feedback in the physical movement by measuring the grasp force output under different visual feedback gain levels. To this end, two force tracking tasks with different incremental/decremental rates of the force have been designed, and the force deviation and the error rate from the 12 participants are recorded when they are exposed to different visual gains. Further statistical analysis on the experimental data reveals that the gain of visual stimuli has a significant influence on the force output. For the same force tracking task, visual feedback with high gain tends to enhance the regulation of force production. The results also suggest that different visual feedback gains may be mapped onto different cortex function areas governing different motor tasks

关键词： Output feedback Force feedback Force measurement Delay Frequency Gain measurement Motion measurement Error analysis Statistical analysis Production

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Vertical Vergence Calibration for Augmented Reality Displays

Vertical Vergence Calibration for Augmented Reality Displays

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IEEE Annual International Symposium Virtual Reality

作者： M.A. Livingston S.R. Ellis S.M. White S.K. Feiner A. Lederer Adam Lederer Naval Research Laboratory USA Virtual Reality Lab Naval Research Laboratory Inc. USA Human Information Processing Research Branch NASA Ames Research Center Human Information Processing Research Branch NASA Ames Research Center USA Department of Computer Science Columbia University Department of Computer Science Columbia University USA

Stereo and bi-ocular head-mounted displays (HMDs) require the user to fuse two images into a coherent picture of the threedimensional world. The human visual system performs this task constantly, but when the input images contain both real and graphical depictions, the problem becomes more difficult. A vertical disparity in the graphics causes diplopia for users trying to fuse the real and virtual objects simultaneously. We implement three methods to measure and correct this disparity and assess them with a collection of a single model of optical see-through HMD.

关键词： Calibration Augmented reality Fuses Eyes computer displays humans Visual system computer graphics Image segmentation Virtual reality

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Bayesian Interpretation of Adaptive Fuzzy Neural Network Model

Bayesian Interpretation of Adaptive Fuzzy Neural Network Mod...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Sang Wan Lee Dae-Jin Kim Yong Soo Kim Zeungnam Bien Electrical Engineering and Computer Science Department Korean Advanced Institute of Science and Technology Daejeon South Korea Human-friendly Welfare Robot System Engineering Research Center Korean Advanced Institute of Science and Technology Daejeon South Korea Division of Computer Engineering Daejeon University Daejeon South Korea

This paper conveys Bayesian interpretation of improved integrated adaptive fuzzy clustering(IAFC), which is one of the adaptive fuzzy neural network models and suggests upper bound of vigilance parameter, which gives us a guideline to endow IAFC with flexibility within the framework of minimum risk classifier. Besides, we proposed the off-line and on-line learning strategy of IAFC. The proposed techniques are applied to construct facial expression recognition system dealing with neutral, happy, sad, and angry. We empirically show that proposed methods are able to outperform the conventional IAFC.

关键词： Bayesian methods Adaptive systems Fuzzy neural networks Clustering algorithms Intelligent robots Decision theory Guidelines Face recognition Partitioning algorithms Service robots

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Advanced Functions of the Scanning Laser Range Sensor for Environment Recognition in Mobile Robots

Advanced Functions of the Scanning Laser Range Sensor for En...

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International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)

作者： Hirohiko Kawata Satofumi Kamimura Akihisa Ohya Jun'ich Iijima Shin'ich Yuta The Department of Computer Science University of Tsukuba Tsukuba Japan Department of Intelligent Interaction Technologies Graduate School of System and Information Engineering University of Tsukuba Tsukuba Japan The Mechanical Engineering Research Laboratory Hitachi Ltd. Hitachinaka Japan Department of Computer Science Graduate School of System and Information EngineeringGraduate School of System and Information Engineering University of Tsukuba Tsukuba Japan The Faculty of Information Science Meisei University Hino Japan

We have developed scanning laser range sensor called "SOKUIKI" sensor which is ultra-small scanning laser range sensor adopted for various types of mobile robots as we have already published. As a sensor for environment recognition, we thought the sensor must have not only outputting distance data but also another helpful function for mobile robots. So it was considered that what kind of advanced functions should be provided to SOKUIKI sensor. As a result two most important purposes were acquired. 1. Variation on its distance data and method to get the data. 2. The function for prevention of optical interference between sensors. These rolls were installed to the sensor, and confirmed their effect. This paper describes its result and proposes sensor communication interface protocol (SCIP) which is developed as new command system just for SOKUIKI sensor

关键词： Mobile robots Intelligent sensors Sensor systems Sensor fusion Systems engineering and theory Optical sensors Robot sensing systems Frequency Laser fusion Sensor phenomena and characterization

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SUPPORTING SELF-DIRECTED LEARNERS AND LEARNING COMMUNITIES WITH SOCIOTECHNICAL ENVIRONMENTS

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Research and Practice in Technology Enhanced Learning 2006年第1期1卷 31-64页

作者： GERHARD FISCHER MASANORI SUGIMOTO Center for LifeLong Learning and Design (L3 D) Department of Computer Science University of Colorado 430 UCB Boulder CO 80309-0430 USA Interaction Technology Lab. Department of Frontier Sciences University of Tokyo 5-1-5 Kashiwanoha Kashiwa Chiba 277-8561 Japan

Making learning part of life is an essential challenge for inventing the future of our societies. Lifelong learning is a necessity rather than a possibility or a luxury to be considered. Self-directed learning (often occurring as learning on demand in response to breakdowns) is the dominant form of lifelong learning. The power of the unaided individual mind is highly overrated. Although society often thinks of creative individuals as working in isolation, learning and creativity result in large part from the interaction and collaboration with other individuals. Much human creativity is social, and learning communities are needed to cope with the challenges of making learning part of life. This paper articulates existing problems in our current and future world requiring lifelong and self-directed learning and learning communities. It defines conceptual frameworks and it describes four innovative computational environments: (1) domain-oriented design environments, (2) critiquing systems, (3) the Envisionment and Discovery Collaboratory, and (4) Caretta. The paper concludes by providing a set of challenges for the future use of technology to enhance learning based on the conceptual frameworks and the experience and assessment of our system development efforts.

关键词： Self-directed learning lifelong learning learning on demand collaborative learning integration of working and learning critiquing breakdowns simulation change symmetry of ignorance gift-wrapping approach of using technology sociotechnical environments meta-design

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