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SPUTERS: An integrated traffic surveillance and emergency response architecture

Journal of Intelligent Transportation Systems: Technology, Planning, and Operations 2005年第1期9卷 11-22页

作者： Kodali, Naren Wijesekera, Duminda Michael, James Bret Department of Information and Software Engineering George Mason University Fairfax VA Center for Secure Information Systems George Mason University Fairfax VA Department of Computer Science Naval Postgraduate School Monterey CA Department of Computer Science Naval Post-graduate School 833 Dyer Rd. Monterey CA 93943-5118 United States

Secure Progressively Updatable Traffic Emergency Response System (SPUTERS) is a framework for collecting traffic-surveillance data in crash-prone areas of roadways. SPUTERS receives as input video, audio, and text-based data from an integrated collection of distributed cameras and sensors, both vehicle-borne and those embedded in the roadway infrastructure. Under nominal roadway operating conditions, the multimedia data are used to develop incident countermeasures. During degraded modes of roadway operation, SPUTERS generates progressive updates to create a shared situational awareness among the people who orchestrate responses to traffic incidents and emergencies. In addition to addressing performance-oriented quality-of-service requirements for interactive display of data on Itandheld devices, SPUTERS relies on role-based access control to safeguard the privacy of roadway users under surveillance, preventing privileged information collected and managed by the system from being leaked to unauthorized persons. In order to enhance security, SPUTERS uses symmetric key encryption to guard against the unauthorized alteration of the surveillance data. Copyright © Taylor and Francis Inc.

关键词： Traffic control

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CUMBIA: an agent framework to detect opportunities for collaboration

CUMBIA: an agent framework to detect opportunities for colla...

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International Conference on computer Supported Cooperative Work in Design

作者： M. Moreno A. Vivacqua J. de Souza Computer Science Program Graduate School of Engineering COPPE Rio de Janeiro Brazil DCC/IM-Institute of Mathematics Federal University of Rio de Janeiro Rio de Janeiro Brazil

With the increase in adoption of remote work groups and teams working in non-collocated environments, several opportunities for interaction have been lost. Contact with colleagues and discovery of opportunities, previously easy due to physical proximity, is made harder with distance. In this paper, we describe an agent-based framework to assist users in finding opportunities for interaction that may have been overlooked.

关键词： Collaboration Collaborative work computer science Mathematics Team working IP networks computer networks Teleconferencing Subcontracting Scheduling

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A Proposal for Blind Fir Equalization of Time-Varying Channels

A Proposal for Blind Fir Equalization of Time-Varying Channe...

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IEEE Workshop on Machine Learning for Signal Processing

作者： C. Junqueira F.O. de Franca R.R.F. Attux R. Suyama L.N. de Castro F.J. von Zuben J.M.T. Romano DSPCom Unicamp Brazil Institute of Aeronautics and Spacel Aerospace Technical Center Brazil LBiC/DCA/FEEC/Unicamp Brazil LBiC Unicamp Brazil DSPCom/FEEC/Unicamp Brazil Graduate Program in Computer Science UniSantos Brazil

The multimodal and time-varying aspects of blind equalization problems in communication systems are treated here by means of an immune-inspired strategy capable of estimating the coefficients of the FIR equalization filter in an unsupervised manner. The associated optimization problem is solved by means of a population-based search technique characterized by a dynamic control of the population size and diversity maintenance. Static and time-varying channels have been proposed in simulated scenarios, aiming at indicating the tracking capability derived from the adaptive adjustment of the coefficients of the blind equalizer

关键词： Proposals Finite impulse response filter Blind equalizers Time-varying channels Time varying systems computer science Aerodynamics Size control Communication system control High performance computing

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Comparing adaptation of constrained and unconstrained movements in three dimensions

Comparing adaptation of constrained and unconstrained moveme...

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IEEE International Conference on Rehabilitation Robotics (ICORR)

作者： C. Scharver J. Patton R. Kenyon E. Kersten Sensory Motor Performance Program Rehabilitation Institute of Chicago Chicago IL USA Robotics Laboratory Rehabilitation Institute of Chicago Chicago IL USA Department of Computer Science University of Illinois Chicago IL USA Biomedical Engineering Graduate Program University of Wisconsin Madison WI USA

This paper describes targeted reaching experiments conducted using a new augmented reality system. Combining a large-workspace immersive virtual environment with physical force feedback, the system distorted subjects' movements using a viscous curl force field. Following previous experiments using a different robot, half the subjects were constrained to horizontal, planar movements. The remaining subjects performed unconstrained movements throughout the 3D workspace. Examining after-effects as an indication of learning, we found that constrained subjects learned the force field. However, it was difficult to detect whether the unconstrained subjects learned forces of identical magnitude. Our results found that force fields strengths eliciting constrained 2D adaptation have difficulty exhibiting after-effects for unconstrained 3D movements. The increased motor variability for 3D reaching movements requires consideration for future experimental design.

关键词： Rehabilitation robotics Robot sensing systems Nonlinear distortion Force feedback Displays Laboratories Augmented reality Virtual environment Design for experiments Haptic interfaces

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Elementary science classroom learning with wireless response devices implementing active and experiential learning

Elementary science classroom learning with wireless response...

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IEEE International Workshop on Wireless, Mobile and Ubiquitous Technology in Education (WMUTE)

作者： Yu-Fen Chen Chen-Chung Liu Ming-Hung Yu Sung-Bin Chang Yun-Chen Lu Tak-Wai Chan Department of Computer Science Information Engineering National Central University Taiwan Graduate Institute of Network Learning Technology National Central University Taiwan Degree Program of E-Learning College of Science National Chiao Tung University Taiwan Chu-Wei Elementary School Taiwan

Active learning enables learners to actively engage in learning. Learning not only transfers material to students for learning, but also encourages greater mental engagement and more extensive student-student and student-instructor interaction than does a typical lecture class. Peer instruction (PI) engages students in active learning by achieving continuous instructor-student interaction in a physics lecture. However, the methodologies and the effectiveness of implementing PI for elementary school students have seldom been clarified. This study explores the possibility of adopting PI in an elementary science classroom. The research considerations of the study are as follows: (1) how wireless technology can enhance PI in elementary science classroom; (2) how a teacher can engage students in pre-class reading, and (3) whether elementary school students have sufficient social skills to perform a PI discussion? These questions are examined by observing how the PI pedagogical model worked with a wireless response system in elementary science classroom. Based on the observation, this study also proposes a way of improving the PI learning experience of elementary school students by adding experiments and observations during peer discussion to explain concepts and phenomena in physics.

关键词： Educational institutions Physics Chemical elements computer science Materials science and technology Electronic learning Probes Astrochemistry Physiology Astronomy

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Knowledge management support for collaborative emergency response

Knowledge management support for collaborative emergency res...

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International Conference on computer Supported Cooperative Work in Design

作者： V.B. Diniz M.R.S. Borges J.O. Gomes J.H. Canos Graduate Program in Information Technology Núcleo de Computação Eletrõnica and Instituto de Matemática Universidade Federal do Rio de Janeiro Brazil Department of Computer Science (DSIC Technical University of Valencia Spain

An emergency response activity usually involves several teams from different organizations working cooperatively for the purpose of saving lives or properties. These teams have to make many decisions under time pressure to accomplish their goals. Most decisions require contextual knowledge coming from the emergency settings, including those which report the activities of other emergency teams. The goal of this paper is to describe a system which aims at storing and disseminating the contextual knowledge required by teams during the course of an emergency.

关键词： Knowledge management Collaboration Disaster management Control systems Information technology computer science Teamwork Electric breakdown Context Management information systems

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Journal of Information science and Engineering: Editorial notice

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Journal of Information science and Engineering 2005年第5期21卷 i-ii页

作者： Lee, Der-Tsai Amato, Nancy M. Chang, Shih-Fu Chen, Homer H. Chen, Tsuhan Hsu, Tsan-Sheng Hwang, Jenq-Neng Kuo, Sy-Yen Kuo, Tei-Wei Li, Chung-Sheng Tokuyama, Takeshi Wing, Jeannette Wu, Tzong-Chen Yen, John Computer Science at Texas A and M University United States Parasol Laboratory United States IEEE Transactions on Parallel and Distributed Systems Computing Research Association's Committee on the Status of Women in Computing Research CRA-W's Distributed Mentor Program United States Department of Electrical Engineering Columbia University United States Lab. United States College of Electrical Engineering and Computer Science National Taiwan University Taiwan IEEE Transactions on Circuits and Systems for Video Technology IEEE Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA United States ACM ACM SIGACT IEEE Computer Society IICM Austria Research and Development of the Department Multimedia Signal Processing Technical Committee IEEE Signal Processing Society United States IEEE Transactions on Circuits and systems for Video Technology College of Electrical Engineering and Computer Science National Taiwan Ocean University Keelung Taiwan Department of Electrical Engineering National Taiwan University Taiwan Department of Computer Science and Information Engineering National Taiwan University Taipei Taiwan IEEE Technical Committee on Real-Time Systems Computer Science Division IBM T.J. Watson Research Center United States IBM Research Division Graduate School of Information Sciences Tohoku University Japan ACM IPSJ Mathematical Society of Japan Japan Department of Computer Science Computer Science Department Carnegie Mellon University United States National Academies of Science's Computer Science and Telecommunications Board United States Microsoft's Trustworthy Academic Advisory Board Intel Research Pittsburgh's Advisory Board United States Dartmouth's Institute for Security Technology Studies Advisory Committee Canada Sloan Research Fellowships Program Committee United States ACM Taiwan China Information Sciences and Technology Pennsylvania State University United States Laboratory for Intelligent Agents Penn State's School of Info

No abstract available

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An efficient polling strategy for Bluetooth piconets using channel state information

An efficient polling strategy for Bluetooth piconets using c...

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Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication

作者： Kleinschmidt, João Henrique Pellenz, Marcelo E. De Paula Lima Jr., Luiz A. Graduate Program in Computer Science Pontifical Catholic University of Paran Curitiba PR Brazil

ISBN: (纸本)0780379381

Bluetooth is an emerging technology for personal wireless communications and is being applied in many scenarios. In this paper we investigate the data scheduling policy for Bluetooth piconets. In general the performance evaluation of most piconet scheduling algorithms recently proposed do not consider the packet losses in the wireless channel. However in environments with high interference or mobility, the channel conditions can mitigate the performance of the polling strategies. In this work we propose a new piconet scheduling algorithm based on the estimated channel state information. The channel is modeled using the Nakagami-m distribution. The channel quality estimation is based on the received signal-to-noise ratio and on the Nakagami fading parameter m. These two metrics are used by the scheduling algorithm to define the best polling strategy. Simulation results demonstrate the good algorithm performance for different traffic conditions. © 2004 IEEE.

关键词： Picocellular radio systems

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A business-oriented perspective for QoS management

A business-oriented perspective for QoS management

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IEEE Workshop on IP Operations and Management, (IPOM)

作者： M.C. Penna C. Kaestner R.R. Wandresen Post Graduate Program in Computer Science Pontifical Catholic University of Paraná Curitiba Brazil

Research efforts in quality of service (QoS) management have usually addressed the problem under the network infrastructure perspective whereas a business-oriented perspective, named service quality management (SQM), is being considered by industry. This paper point out differences and similarities between two approaches and addresses the main issues arising under SQM perspective. Here, QoS indicators and corresponding service levels are defined to provide a common understanding of service delivery, and a critical issue is to provide an effective way to evaluate them. Two evaluation modes are used: off-line and on-line. Off-line methods compute indicators values at the end of a pre-defined evaluation period, whereas on-line methods do it when a related event occurs. This work proposes an architecture for SQM systems and discusses the mechanisms for both off-line and on-line evaluation modes.

关键词： Quality of service Quality management Communication system traffic control computer network management IP networks Engineering management Intserv networks Terminology Delay Project management

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A segmentation-based automatic navigation technique for virtual endoscopy

A segmentation-based automatic navigation technique for virt...

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2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano

作者： Carvalho, Bruno M. Herman, Gabor T. Dept. of Comp. and Info. Science University of Pennsylvania Doctoral Program in Computer Science Graduate Center City University of New York

ISBN: (纸本)0780383885

Virtual endoscopy (VE) mimics the examination consisting of introducing an endoscope into a tubular structure for diagnostic purposes. One of the main problems in VE is the computattion of the navigation path that the virtual camera will travel while producing the animation that will be viewed by the specialist. We propose a technique that allows the automatic computation of navigation paths connecting a starting and one or more end points inside the structure to be visualized. The computation of the path uses the connectedness map produced by the segmentation algorithm that has been used to identify the structure to be visualized in the image. A simple smoothing operation is then applied to this path to produce the final navigation path. © 2004 IEEE.

关键词： Endoscopy

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