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IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics

作者： V. Ramani C.J. Reddy A.Q. Martin EM Software and Systems (USA) Inc. Hampton VA USA Holcombe Department of Electrical and Computer Engineering Elemson University Clemson SC USA

A numerical study of a thin-wire probe inside a slotted rectangular cavity is presented in this work. The results obtained with the 3-D full-wave method of moments based code FEKO is compared to the computations in Ramani, V (2004). The motivation for this study stems from the wide usage of high power RF excitations in electronic systems. Electromagnetic coupling and interference [Christopoulos C. et al., 2001] in electronic devices (computers, sensors, control and communication devices, etc.) is of increasing concern due to the presence of both intentional and un-intentional internal/external electromagnetic sources. After the preliminary comparison of results we introduce a finite conductivity into the walls of the cavity to resemble more practical problems for simulations with FEKO.

关键词： Probes Electromagnetic coupling Apertures Electromagnetic interference Integral equations Moment methods Radio frequency Communication system control Electromagnetic devices Conductivity

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Instrumenting contracts with aspect-oriented programming to increase observability and support debugging

Instrumenting contracts with aspect-oriented programming to ...

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International Conference on software Maintenance (ICSM)

作者： L.C. Briand W.J. Dzidek Y. Labiche Simula Research Laboratory Lysaker Norway Software Quality Engineering Laboratory Systems and Computer Eng. Department Carleton University Ottawa ONT Canada

In this paper we report on how aspect-oriented programming (AOP), using AspectJ, can be employed to automatically and efficiently instrument contracts and invariants in Java. The paper focuses on the templates to instrument preconditions, postconditions, and class invariants, and the necessary instrumentation for compliance-checking to the Liskov substitution principle.

关键词： Instruments Contracts Observability Debugging Java Laboratories software quality systems engineering and theory Automatic programming Law

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A mobile agent system for university course timetabling

A mobile agent system for university course timetabling

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2nd Indian International Conference on Artificial Intelligence, IICAI 2005

作者： Yang, Yan Paranjape, Raman Benedicenti, Luigi Reed, Nancy Electronic and Software Systems Engineering Faculty of Engineering University of Regina Regina SK S4S 0A2 Canada TRLabs Regina University of Regina Regina SK S4S 0A2 Canada Department of Information and Computer Sciences University of Hawai'i Manoa Honolulu HI 96822 United States

ISBN: (纸本)0972741216

A mobile multi-agent system is proposed to create solutions for the university course timetabling problem. It is composed of four kinds of agents: (mobile) Course Agents, and (stationary) Signboard, Publisher and Interface Agents. The key strength of this new approach is to use a fundamental attribute of Agents that of autonomy. This autonomy is manifested in this work in the Course Agent. Each Course Agent in the system is responsible for negotiating with other Course Agents to find satisfactory class resource for the course they represent. This negotiation occurs initially indirectly through a Signboard Asent. A set of rules is used to structure Asent-to-Asent negotiation to find mutually acceptable class resources. The scheduling problem is executed in a natural parallel structure using one Signboard Agent to represent a weekday. The experimental results show that this new approach has merit and can lead to acceptable and flexible solutions to the course timetabling problem. Copyright © IICAI 2005.

关键词： Autonomous agents

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Topic-oriented mining and reasoning

Topic-oriented mining and reasoning

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Proceedings of the International Conference on Active Media Technology, AMT

作者： Y. Li N. Zhong Y.Y. Yao School of Software Engineering and Data Communications Queensland University of Technology Brisbane QLD Australia Department of Systems and Information Engineering Maebashi Institute of Technology Japan Department of Computer Science University of Regina Canada

The discovery of the association between terms and a specified topic is a difficult task. A new data mining technique, topic-oriented mining and reasoning, is presented for this task. The technique consists of two threads: pattern mining and pattern reasoning. Pattern mining means the automatic discovery of interesting user topic models. A novel topic structure is presented for this thread. Pattern reasoning means the utilization and maintenance of the interesting user topic models to determine if an input data is relevant to the specified topic. The innovation for this thread is the use of meta-knowledge for the discovered knowledge. In this way the system can trace errors to update inadequate subtopics in the user topic model. The experimental results show that all objectives we expect for the topic-oriented model are achievable.

关键词： Data mining Yarn Technological innovation Web mining Web pages Clustering methods software engineering Data communication Australia Error correction

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An interactive distributed evolutionary algorithm (IDEA) for design

An interactive distributed evolutionary algorithm (IDEA) for...

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IEEE International Conference on systems, Man and Cybernetics

作者： G. Dozier B. Carnahan C. Seals L.-A. Kuntz Ser-Geon Fu Department of Computer Science & Software Engineering Aubum University Auburn AL USA Department of Industrial Systems Engineering Aubum University Auburn AL USA Department of Psychology University of Maine Machias Machias ME USA

Evolutionary computation (EC) has been successfully applied to a wide range of design problems. There has also been an abundant amount of work in applying interactive ECs in the design of displays, robot behavior, bitmaps, etc. In the EC literature, one can also see a number of successful design applications of distributed ECs. However, to date, there has been no research in the area of interactive distributed ECs. In this paper, we present an interactive distributed evolutionary algorithm (IDEA) for the design of simple emoticons. We will discuss two ways that our IDEA is currently being used including the areas of EC education and Human Factors.

关键词： Evolutionary computation Algorithm design and analysis Cascading style sheets Seals Design engineering Robots Human factors IEC standards computer science software engineering

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Investigating manifold learning algorithms based on magnification factors and principal spread directions

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Jisuanji Xuebao/Chinese Journal of computers 2005年第12期28卷 2000-2009页

作者： He, Li Zhang, Jun-Ping Zhou, Zhi-Hua Shanghai Key Laboratory of Intelligent Information Processing Department of Computer Science and Engineering Fudan University Shanghai 200433 China Key Laboratory of Complex Systems and Intelligence Science Chinese Academy of Sciences Shanghai 200433 China Department of Computer Science and Engineering School of Mathematical Sciences Fudan University Shanghai 200433 China National Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China

As a new unsupervised learning technique, manifold learning has captured the attention of many researchers in the field of machine learning and cognitive sciences. The major algorithms include Isometric mapping (ISOMAP) and Locally Linear Embedding (LLE). The approaches can be used for discovering the intrinsic dimensions of nonlinear high-dimensional data effectively and aim researchers to analyze the data better. How to quantitatively analyze the relationship between the intrinsic dimensions and the observation space, however, has fewer reports. And thus further works in manifold learning may have suffered some difficulties. The paper focuses on two kinds of manifold learning algorithms (ISOMAP, LLE), and discusses magnification factors and principal spread directions from the observation space to the intrinsic low-dimensional space. Also the corresponding algorithm is proposed. Experiments show the effectiveness and advantages of the research.

关键词： Learning algorithms

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Cost-benefit trade-off analysis using BBN for aspect-oriented risk-driven development

Cost-benefit trade-off analysis using BBN for aspect-oriente...

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IEEE International Conference on engineering of Complex computer systems

作者： S.H. Houmb G. Georg R. France J. Bieman J. Jurjens Department of Computer Science Norwegian University of Science and Technology Trondheim Norway Software Assurance Laboratory Department of Computer Science Colorado State University Fort Collins CO USA Systems Engineering Technical University Munich Munchen Germany

Security critical systems must perform at the required security level, make effective use of available resources, and meet end-users expectations. Balancing these needs, and at the same time fulfilling budget and time-to-market constraints, requires developers to design and evaluate alternative security treatment strategies. In this paper, the authors presented a development framework that utilizes Bayesian belief networks (BBN) and aspect-oriented modeling (AOM) for a cost-benefit trade-off analysis of treatment strategies. AOM allows developers to model pervasive security treatments separately from other system functionality. This eases the trade-off by making it possible to swap treatment strategies in and out when computing return on security investments (RoSI). The trade-off analysis is implemented using BBN, and RoSI is computed by estimating a set of variables describing properties of a treatment strategy. RoSI for each treatment strategy is then used as input to choice of design.

关键词： Risk analysis Information security Topology Bayesian methods computer science computer security Investments Data security Unified modeling language software performance

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Method for automatically segmenting the spinal cord and canal from 3D CT images

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11th International Conference on computer Analysis of Images and Patterns, CAIP 2005

作者： Nyúl, Lászlo G. Kanyó, Judit Máté, Eörs Makay, Géza Balogh, Emese Fidrich, Márta Kuba, Attila Department of Image Processing and Computer Graphics University of Szeged Árpád tér 2 H-6720 Szeged Hungary Clinical Software Engineering GE Medical Systems Lajos u. 48-66 H-1036 Budapest Hungary Institute of Mathematics University of Szeged Aradi vértanuk tere 1 H-6720 Szeged Hungary

ISBN: (纸本)3540289690

We present two approaches for automatically segmenting the spinal cord/canal from native CT images of the thorax region containing the spine. Different strategies are included to handle images where only part of the spinal column is visible. The algorithms require one seed point given on a slice located in the middle region of the spine, and the rest is automatic. The spatial extent of the spinal cord/canal is determined automatically. An extended region-growing technique is suggested for segmenting the spinal canal while active contours are applied if the spinal cord is to be segmented. Both methods work in 2D and use propagated information from neighboring slices. They are also very rapid in execution, that means an efficient, user-friendly workflow. The methods were evaluated by radiologists and were found to be useful (in reducing/eliminating contouring labor and time) and met the accuracy and repeatability requirements for the particular task. © Springer-Verlag Berlin Heidelberg 2005.

关键词： computerized tomography

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Decomposition techniques for a loosely-coupled resource allocation problem

Decomposition techniques for a loosely-coupled resource allo...

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IEEE/WIC/ACM International Conference on Intelligent Agent Technology (IAT)

作者： P. Plamondon B. Chaib-draa A.R. Benaskeur Computer Science & Software Engineering Department Laval University Sainte Foy QUE Canada Decision Support Systems Section Defence Research and Development Canada Val-Belair QUE Canada

We are interested by contributing to stochastic problems of which the main distinction is that some tasks may create other tasks. In particular, we present a first approach which represents the problem by an acyclic graph, and solves each node in a certain order so as to produce an optimal solution. Then, we detail a second algorithm, which solves each task separately, using the first approach, and where an on-line heuristic computes the global actions to execute when the state of a task changes.

关键词： Resource management State-space methods Stochastic processes computer science software engineering Decision support systems Research and development Stochastic systems Explosions Time factors

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Attaining program affordability through integration of logistical operations and health maintenance

Attaining program affordability through integration of logis...

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1st Space Exploration Conference: Continuing the Voyage of Discovery

作者： Goforth, Andre Karsai, Gabor Orosz, Michael Neches, Robert Szekely, Pedro Ashish, Naveen NASA Ames Research Center Moffett Field CA 94035-1000 United States Vanderbilt University Institute for Software Integrated Systems Nashville TN 37235 United States University of Southern California Information Sciences Institute Marina del Rey CA 90292 United States USRA Research Institute for Advanced Computer Science NASA Ames Research Center Moffett Field CA 94035 United States Code TC MS269-4 United States Department of Electrical and Computer Engineering Distributed Scalable Systems Division

ISBN: (纸本)1563477270

Program affordability needs to be built-in at the initial concept formulation stage. For NASA's space exploration vision this is critical for long range sustainability of human presence in space. What is often overlooked in the initial concept formulation of a large scale system endeavor such as NASA's Constellation program is the hidden cost of maintaining requisite operational safety margins and redundancy through adequate supply chain logistics. Ensuring adequate supply chain logistics necessitates the integration of operations and maintenance cycles. What enables this integration is the coordination and reconciliation across multiple equipment types of system health features and logistical information such as: (1) prognostic drivers from Integrated Vehicle Health Monitoring (IVHM) systems producing proactive condition-based "maintain me" demands, (2) maintenance management systems tracking usage and producing scheduled maintenance demands, (3) unscheduled maintenance demands resulting from any trouble reports entered by human observers of conditions missed by the IVHM system, and (4) implicit maintenance demands resulting from mission plans which require assignment of vehicular/robotic assets and consequently require assurance of the assigned assets' fitness for the intended tasks. In this paper we discuss how Coordinated Multi-source Maintenance on Demand (CMMD) technology, which is being is transitioned to the USMC Coherent Analytical Computing Environment (CACE) program and the Joint Strike Fighter Program, can be applied to the NASA domain, and its benefits in terms of mission affordability, operations efficiency and system health effectiveness. Using concepts derived from CMMD, we discuss the kind of IVHM capabilities needed to optimize multiple, parallel, yet inter-linked, operations-maintenance cycles, thereby optimizing program affordability while meeting specific mission supportability requirements across a broad range of mission scenarios.

关键词： Space research

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