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IEEE International Symposium on Biomedical Imaging

作者： Alireza Akhoundi-Asl Hamid Soltanian-Zadeh School of Cognitive Sciences Institute of Studies in Theoretical Physics and Mathematics Tehran Iran Control and Intelligent Processing Center of Excellence (CIPCE) School of Electrical and Computer Engineering University of Tehran Tehran Iran Image Analysis Laboratory Radiology Department Henry Ford Health System Detroit MI USA

ISBN: (纸本)9781424406715;1424406714

We propose a 3D nonparametric, entropy-based, coupled, multishape approach for the segmentation of subcortical brain structures in magnetic resonance images (MRI). Our method uses PCA to capture structures variability. Because of complex relationships of pose and shape of the coupled structures, we only use their shape and size relation. To this end, we apply separate registrations of the structures. For each structure, we consider a similarity transform using seven parameters. In addition, to generate most accurate results, we estimate probability density functions (pdf) iteratively. The proposed method minimizes an entropy-based energy function using quasi-Newton algorithm. To improve the results, we use analytical derivatives. Sample results are given for the segmentation of putamen, thalamus and caudate illustrating the impact of coupling on the accuracy of the results.

关键词： Biomedical imaging Image segmentation Shape Couplings Brain Magnetic resonance Magnetic resonance imaging Principal component analysis Probability density function Iterative algorithms

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A Secure Multicast Model for Peer-to-Peer and Access Networks Using the Host Identity Protocol

A Secure Multicast Model for Peer-to-Peer and Access Network...

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4th IEEE Consumer Communications and Networking Conference (CCNC 2007), vol.3

作者： Xueyong Zhu J. William Atwood Network Information Center University of Science and Technology Hefei Anhui China Department of Computer Science and Software Engineering Concordia University Montreal QUE Canada

Standard IP multicast makes no provision for authenticating or authorizing the participant hosts, nor for ensuring confidentiality of the data stream. An architecture for achieving these goals is proposed, based on the use of an extended version of the Host Identity Protocol. The applicability of the model is demonstrated for peer-to-peer multicasting and for non-shared media access networks. A formal validation of a two-layer peer-to-peer network based on this architecture has been completed.

关键词： IP-multicast Model Security HIP Group Identity Architecture HIP-multicast Model

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Presentation and Visualization of Redundant Code: Working Session Summary

Presentation and Visualization of Redundant Code: Working Se...

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Duplication, Redundancy, and Similarity in software 2006

作者： Walenstein, Andrew Cordy, Jim Evans, Will Hassan, Ahmed Kamiya, Toshihiro Kapser, Cory Merlo, Ettore University of Louisiana at Lafayette Center for Advanced Computer Studies P.O. Box 44330 LafayetteLA70504-4330 United States Queen's University School of Computing KingstonONK7L 3N6 Canada University of British Columbia Department of Computer Science 201-2366 Main Mall VancouverBCV6T 1Z4 Canada University of Victoria Electrical and Computer Engineering Engineering Office Wing 315 P.O. Box 3055 VictoriaBCV8W 3P6 Canada Information Technology Research Institute Ubiquitous Software Group University of Waterloo David R. Cheriton School of Computer Science WaterlooONN2L 3G1 Canada C.P. 6079 Succ. Centre Ville MontréalQCH3C 3A7 Canada

This report summarizes the proceedings of a workshop discussion session presentation and visualization of aspects relating to duplicated, copied, or cloned code. The main outcomes of the working session were: (a) a realization that two researchers had independently generated very similar methods for browsing and visualization clone "clusters", and (b) a list of questions for visualization, particularly in relation to how the "proximity" of clones may relate to interest in the clone. © Duplication, Redundancy, and Similarity in software *** rights reserved.

关键词： Visualization

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Evaluation, selection, and application of model-based diagnosis tools and approaches

Evaluation, selection, and application of model-based diagno...

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2007 AIAA InfoTech at Aerospace Conference

作者： Poll, Scott Patterson-Hine, Ann Camisa, Joe Nishikawa, David Spirkovska, Lilly Garcia, David Hall, David Neukom, Christian Sweet, Adam Yentus, Serge Lee, Charles Ossenfort, John Mengshoel, Ole J. Roychoudhury, Indranil Daigle, Matthew Biswas, Gautam Koutsoukos, Xenofon Lutz, Robyn NASA Ames Research Center Moffett Field CA 94035 United States QSS Group Inc. Perot Systems Government Services Moffett Field CA 94035 United States SAIC Moffett Field CA 94035 United States RIACS Moffett Field CA 94035 United States Vanderbilt University Nashville TN 37235 United States Jet Propulsion Lab. Caltech. Iowa State University Ames IA 50011 United States ADAPT Discovery and Systems Health MS 269-1 United States Discovery and Systems Health MS 269-4 United States Electronic Systems and Controls Branch MS 213-2 United States Department of Electrical Engineering and Computer Science Institute for Software Integrated Systems United States Department of Computer Science

ISBN: (纸本)1563478935

Model-based approaches have proven fruitful in the design and implementation of intelligent systems that provide automated diagnostic functions. A wide variety of models are used in these approaches to represent the particular domain knowledge, including analytic state-based models, input-output transfer function models, fault propagation models, and qualitative and quantitative physics-based models. Diagnostic applications are built around three main steps: observation, comparison, and diagnosis. If the modeling begins in the early stages of system development, engineering models such as fault propagation models can be used for testability analysis to aid definition and evaluation of instrumentation suites for observation of system behavior. Analytical models can be used in the design of monitoring algorithms that process observations to provide information for the second step in the process, comparison of expected behavior of the system to actual measured behavior. In the final diagnostic step, reasoning about the results of the comparison can be performed in a variety of ways, such as dependency matrices, graph propagation, constraint propagation, and state estimation. Realistic empirical evaluation and comparison of these approaches is often hampered by a lack of standard data sets and suitable testbeds. In this paper we describe the Advanced Diagnostics and Prognostics Testbed (ADAPT) at NASA Ames Research center. The purpose of the testbed is to measure, evaluate, and mature diagnostic and prognostic health management technologies. This paper describes the testbed's hardware, software architecture, and concept of operations. A simulation testbed that accompanies ADAPT, and some of the diagnostic and decision support approaches being investigated are also discussed.

关键词： Intelligent systems

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Proactive Cellular Network Faults Prediction Through Mobile Intelligent Agent Technology

Proactive Cellular Network Faults Prediction Through Mobile ...

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International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless)

作者： Okuthe P. Kogeda Johnson I. Agbinya Department of Computer Science (Center of Excellence for IP and Internet Computing) University of Western Cape Bellville South Africa Centre for Real-Time Information Networks (CRIN) Faculty of Engineering University of Technology Sydney NSW Australia

Cellular network faults prediction models using mobile intelligent agent are presented in this paper. Cellular networks are uncertain and dynamic in their behaviours and therefore we use different artificial intelligent techniques to develop platform independent, autonomous, reasoning and robust agents that can report on any unforeseen anomaly within the cellular network service provider. The specific design and implementation is done using Java Agent DE-velopment Framework (JADE). The partial results obtained from the experiments conducted are presented and discussed in this paper.

关键词： Mobile Intelligent Agent OSS Fault Prediction Bayesian Networks Cellular network faults and Services

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Product and process architectures for integrating agile and plan-driven methods

Product and process architectures for integrating agile and ...

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7th International Conference on eXtreme Programming and Agile Processes in software engineering: Tutorials, Workshops, Activities, and Keynote Speeches

作者： Boehm, Barry Computer Science Department USC Center for Software Engineering United States

No abstract available

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Routing for the Pennsylvania Maglev system by a genetic algorithm (vol 220, pg 55, 2006)

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT 2006年第4期220卷 475-475页

作者： Cao, Y-Y Lin, Z. Giras, T. C. Disk, D. R. Center of Rail Safety-Critical Excellence Charlottesville Virginia USA Charles L. Brown Department of Electrical and Computer Engineering University of Virginia Charlottesville Virginia USA Director of Engineering Maglev Inc. Pittsburgh Pennsylvania USA

The scheduling of vehicle movement activities is an important component in highspeed railway transit operations planning process. This paper presents a mathematical programming approach to vehicle routing for the Pennsylvania Transrapid Maglev Train System. A mathematical model of the routing procedure is first derived. Based on this model, the vehicle routing problem is formulated into a constrained optimization problem, in which the train miles travelled are maximized subject to various operational and safety requirements. This large scale non-linear optimization problem is then solved by a genetic algorithm.

关键词： genetic algorithm Maglev vehicle routing

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Virtual sensors: Abstracting data from physical sensors 06

Virtual sensors: Abstracting data from physical sensors

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WoWMoM 2006: 2006 International Symposium on a World of Wireless, Mobile and Multimedia Networks

作者： Kabadayi, Sanem Pridgen, Adam Julien, Christine Center for Excellence in Distributed Global Environments Department of Electrical and Computer Engineering University of Texas Austin

ISBN: (纸本)0769525938

Sensor networks are becoming increasingly pervasive. Existing methods of aggregation in sensor networks offer mostly standard mathematical operators over homogeneous data types. In this paper, we instead focus on supporting emerging scenarios in which applications will need to extract abstracted measurements from diverse sets of sensor network nodes. This paper introduces the virtual sensors abstraction that enables an application developer to programmatically specify an application's high-level data requirements. This paper reports on our initial work with the virtual sensors and the results of our prototype implementation. © 2006 IEEE.

关键词： Sensor data fusion

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A Process Model Design and Tool Development for Supplier Agreement Management of CMMI: Capability Level 2

A Process Model Design and Tool Development for Supplier Agr...

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Asia-Pacific Conference on software engineering

作者： Chakkanart Vivatanavorasin Nakornthip Prompoon Athasit Surarerks Software Engineering Lab Center of Excellence in Software Engineering Department of Computer Engineering Chulalongkom University Thailand

Acquired software products from suppliers are being increasing tremendously because of insufficiency of resources and capable employees. To manage and monitor the product acquisition process effectively according to a signed contract with a supplier, an organization has to define the standard of workflow, deliverable products in each step and staff roles and responsibilities, etc. Thus, there is a need to incorporate these diversified processes into a single process model that could helps to reach the software product acquisition goal. CMMI defines supplier agreement management process area (SAM) that relates to product acquisition but it does not describe how the organization should do to achieve its expectation. This research presents a business workflow process model for SAM process area of CMMI: capability level 2. It consists of three layers: contextual layer, elaboration layer, and definition layer. A software tool called supplier agreement management tool (SAMT) is also developed to help integrate the details of our approach and can be used for the proposed process model.

关键词： Process design Capability maturity model software tools software engineering Subcontracting software development management Design engineering Business Costs Best practices

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ByZFAD: A low switching activity architecture for shift-and-add multipliers

ByZFAD: A low switching activity architecture for shift-and-...

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SBCCI 2006 - 19th Symposium on Integrated Circuits and Systems Design

作者： Mottaghi, Mohammad D. Kusha, Ali Afzali Navabi, Zainanabedin Nanoelectronics Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran Department of Electrical and Computer Engineering Northeastern University Boston United States

ISBN: (纸本)1595934790

In this paper, a low-power architecture (ByZFAD Stands for Bypass Zero, Feed A Directly) for shift-and-add multipliers is proposed. The architecture considerably lowers the switching activity of conventional multipliers. The modifications include the removal of the shift of B register, direct feeding of A to the adder, bypassing the adder whenever possible, using a ring counter instead of the binary counter, and removal of the partial product shift. To show the efficiency of the architecture, we have compared the switching activity of the proposed architecture with that of the conventional architecture for a radix-2 shift-and-add multiplier. The results for a 32-bit multiplier show that, the proposed architecture lowers the total switching activity up to 76% when compared to the traditional architecture. Copyright 2006 ACM.

关键词： Multiplying circuits

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