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Correction to “SCoRS—A Method Based on Stability for Feature Selection and Mapping in Neuroimaging” [Jan 14 85-98]

IEEE Transactions on Medical Imaging 2014年第3期33卷 794-794页

作者： Jane M Rondina Tim Hahn Leticia de Oliveira Andre F. Marquand Thomas Dresler Thomas Leitner Andreas J Fallgatter John Shawe-Taylor Janaina Mourao-Miranda Centre for Neuroimaging Sciences King's College London UK Department of Cognitive Psychology II Johann Wolfgang Goethe University Frankfurt/Main Frankfurt Germany Biomedical Institute Fluminense Federal University Niterói Brazil Department of Psychiatry University of Wuerzburg Germany CIN Cluster of Excellence University of Tübingen Tübingen Germany Department of Computer Science University College London London UK

In the above paper (ibid., vol. 33, no. 1, pp. 85-98, Jan. 2014), the title appeared incorrectly as "SCoRS—A Method Based on Stability for Feature Selection and Apping in Neoroimaging." The title should hav... 详细信息

关键词： Magnetic resonance imaging Face recognition Image classification Machine learning Support vector machines Neuroimaging

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Tutorial 1: Foundations and Practical Design of CMOS Image Sensors

Tutorial 1: Foundations and Practical Design of CMOS Image S...

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IEEE International Conference on Electronics, Circuits and Systems (ICECS)

作者： Angel Rodríguez-Vázquez Hamada Alshaer Bayan Sharif Amr Fahim Eman El Mandouh Ashraf Salem Fadi A. Aloul Hoda S. Abdel-Aty John F. Dodge Baker Mohammad Hisham Mohamed IMSE-CNM Universidad de Sevilla/CSIC AnaFocus Ltd Sevilla Spain Etisalat BT Innovation Center (EBTIC) Khalifa University Abu Dhabi UAE Electrical and Computer Engineering Dean of the College of Engineering at Khalifa Abu Dhabi UAE Semtech Corporation Irvine CA Mentor Graphics Cairo Egypt Department of Computer Science & Engineering American University in Sharjah U.A.E. Oakland University Rochester MI USA Khalifa University of Science Technology & Research (KUSTAR) UAE Rensselaer Polytechnic Institute Troy NY USA

CMOS imagers are complex systems whose design requires quite different pieces of expertise, namely: pixels, analog signal processing, pixel readout and analog-to-digital conversion, digital signal processing, output drivers, etc. Confronting the design of new imagers require hence the concourse of multidisciplinary teams. However, because correct operation calls for the close interconnection among the different parts, global knowledge is mandatory for successful design. This is particularly pertinent for the newer generations of smart imagers required for high-end applications and/or requiring ultra-high image capture, on-chip image correction, scene interpretation, high dynamic range capture, etc. All these features demand architectural and circuital innovations and pose significant challenges to designers. Also, the increased interest on sensors capable of capturing 3-D scenes raise new challenges at circuit level related to the necessity to interface pixels different from those employed for 2-D capture, on the one hand, and to extract and convert to digital domain time information, on the other hand. This tutorial addresses the design of smart CMOS imagers by following a comprehensive and complete top-down approach where each subsystem is contemplated and described as a part of a whole. Starting the formulation of the performance metrics used to specify and characterize imagers, the tutorial explains how the subsystem behavior and non-idealities impact on the global imager metrics, thereby setting the basis to specify the subsystems for given global image sensor specs. Such methodology is illustrated in the tutorial via a dedicated, MATLAB-based modeling tool which will be employed to allow the attendees gaining insight on the impact of non-ideal sub-systems behaviors. The tutorial overviews the state-of-the-art regarding: pixels; analog signal processing and read-out circuitry; data conversion circuitry, covering both amplitude data converters (required for 2-D

关键词： Tutorials Sensors Wireless sensor networks Energy harvesting Abstracts Educational institutions Cognitive radio

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Computational techniques for efficient analysis of large halo current models in fusion devices

Computational techniques for efficient analysis of large hal...

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Computational Electromagnetics Workshop

作者： R. Albanese B. Carpentieri G. Rubinacci S. Ventre F. Villone Associazione EURATOM ENEA CREATE DIETI Università Federico II di Napoli Napoli Italy Johann Bernoulli Institute for Mathematics and Computer Science University of Groningen Groningen Netherlands Associazione EURATOM ENEA CREATE DIEI Università di Cassino e del Lazio Meridionale Cassino Frosinone Italy

One of the main concerns in a tokamak is the risk of disruptions with asymmetric halo currents flowing partially in the plasma and partially in the surrounding structures. A detailed 3D description of the full torus is therefore needed. This paper proposes a method for the 3D halo current analysis based on an integral formulation, exploiting compression techniques, parallel architectures, and suitable preconditioners. The procedure is shown to work in an ITER-like geometry.

关键词： Plasmas Vectors Three-dimensional displays Magnetic domains Sparse matrices Electric potential Computational modeling

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Efficient computation of 3D Morse-Smale complexes and persistent homology using discrete Morse theory

Efficient computation of 3D Morse-Smale complexes and persis...

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作者： Günther, David Reininghaus, Jan Wagner, Hubert Hotz, Ingrid Computer Graphics Max-Planck Institute for Informatics Stuhlsatzenhausweg 85 66123 Saarbrücken Germany Zuse Institute Berlin Takustrabe 7 14165 Berlin Germany Institute of Computer Science Jagiellonian University Lojasiewicza 6 30-348 Krakow Poland

We propose an efficient algorithm that computes the Morse-Smale complex for 3D gray-scale images. This complex allows for an efficient computation of persistent homology since it is, in general, much smaller than the input data but still contains all necessary information. Our method improves a recently proposed algorithm to extract the Morse-Smale complex in terms of memory consumption and running time. It also allows for a parallel computation of the complex. The computational complexity of the Morse-Smale complex extraction solely depends on the topological complexity of the input data. The persistence is then computed using the Morse-Smale complex by applying an existing algorithm with a good practical running time. We demonstrate that our method allows for the computation of persistent homology for large data on commodity hardware. © Springer-Verlag 2012.

关键词： Computational efficiency

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Graph-based combinations of fragment descriptors for improved 3D object retrieval 12

Graph-based combinations of fragment descriptors for improve...

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3rd ACM Multimedia Systems Conference, MMSys'12

作者： Schreck, Tobias Scherer, Maximilian Walter, Michael Bustos, Benjamin Yoon, Sang Min Kuijper, Arjan Data Analysis and Visualization Group University of Konstanz Germany Interactive Graphics Systems Technische Universität Darmstadt Germany KDW+PRISMA Department of Computer Science University of Chile Chile Yonsei Institute of Convergence Technology Yonsei University Korea Republic of Fraunhofer Institute for Computer Graphics Research Darmstadt Germany

ISBN: (纸本)9781450311311

3D Object Retrieval is an important field of research with many application possibilities. One of the main goals in this research is the development of discriminative methods for similarity search. The descriptor-based approach to date has seen a lot of research attention, with many different extraction algorithms proposed. In previous work, we have introduced a simple but effective scheme for 3D model retrieval based on a spatially fixed combination of 3D object fragment descriptors. In this work, we propose a novel flexible combination scheme based on finding the best matching fragment descriptors to use in the combination. By an exhaustive experimental evaluation on established benchmark data we show the capability of the new combination scheme to provide improved retrieval effectiveness. The method is proposed as a versatile and inexpensive method to enhance the effectiveness of a given global 3D descriptor approach. © 2012 ACM.

关键词： Self organizing maps

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Advanced coarsening schemes for graph partitioning 1

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11th International Symposium on Experimental Algorithms SEA 2012

作者： Safro, Ilya Sanders, Peter Schulz, Christian Mathematics and Computer Science Division Argonne National Laboratory United States Karlsruhe Institute of Technology Institute for Theoretical Informatics Algorithmics II Germany

ISBN: (数字)9783642308505

ISBN: (纸本)9783642308499

The graph partitioning problem is widely used and studied in many practical and theoretical applications. Today multilevel strategies represent one of the most effective and efficient generic frameworks for solving this problem on large-scale graphs. Most of the attention in designing multilevel partitioning frameworks has been on the refinement phase. In this work we focus on the coarsening phase, which is responsible for creating structurally similar to the original but smaller graphs. We compare different matching- and AMG-based coarsening schemes, experiment with the algebraic distance between nodes, and demonstrate computational results on several classes of graphs that emphasize the running time and quality advantages of different coarsenings. © 2012 Springer-Verlag.

关键词： Coarsening

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Evaluation of fast 2D and 3D medical image retrieval approaches based on image miniatures

Evaluation of fast 2D and 3D medical image retrieval approac...

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2nd MICCAI International Workshop on Medical Content-Based Retrieval for Clinical Decision Support, MCBR-CDS 2011

作者： Donner, René Haas, Sebastian Burner, Andreas Holzer, Markus Bischof, Horst Langs, Georg Computational Image Analysis and Radiology Lab. Department of Radiology Medical University of Vienna Austria Institute for Computer Graphics and Vision Graz University of Technology Austria Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology Cambridge MA United States

ISBN: (纸本)9783642284595

The present work evaluates four medical image retrieval approaches based on features derived from image miniatures. We argue that due to the restricted domain of medical image data, the standardized acquisition protocols and the absence of a potentially cluttered background a holistic image description is sufficient to capture high-level image similarities. We compare four different miniature 2D and 3D descriptors and corresponding metrics, in terms of their retrieval performance: (A) plain miniatures together with euclidean distances in a k Nearest Neighbor based retrieval backed by kD-trees;(B) correlations of rigidly aligned miniatures, initialized using the kD-tree;(C) distribution fields together with the l1-norm;(D) SIFT-like histogram of gradients using the χ2-distance. We evaluate the approaches on two data sets: the ImageClef 2009 benchmark of 2D radiographs with the aim to categorize the images and a large set of 3D-CTs representing a realistic sample in a hospital PACS with the objective to estimate the location of the query volume. © 2012 Springer-Verlag.

关键词： Medical imaging

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Non-Abelian Chern-Simons-Higgs vortices with a quartic potential

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Physical Review D 2013年第2期88卷 025026-025026页

作者： J. L. Blázquez-Salcedo L. M. González-Romero F. Navarro-Lérida D. H. Tchrakian Departamento de Física Teórica II Universidad Complutense de Madrid E-28040 Madrid Spain Departamento de Física Atómica Molecular y Nuclear Universidad Complutense de Madrid E-28040 Madrid Spain School of Theoretical Physics Dublin Institute for Advanced Studies 10 Burlington Road Dublin 4 Ireland Department of Computer Science NUI Maynooth Maynooth Ireland

We have constructed numerically non-Abelian vortices in an SU(2) Chern-Simons-Higgs theory with a quartic Higgs potential. We have analyzed these solutions in detail by means of improved numerical codes and found some unexpected features we did not find when a sixth-order Higgs potential was used. The generic non-Abelian solutions have been generated by using their corresponding Abelian counterparts as initial guess. Typically, the energy of the non-Abelian solutions is lower than that of the corresponding Abelian one (except in certain regions of the parameter space). Regarding the angular momentum, the Abelian solutions possess the maximal value, although there exist non-Abelian solutions which reach that maximal value too. In order to classify the solutions it is useful to consider the non-Abelian solutions with asymptotically vanishing At component of the gauge potential, which may be labeled by an integer number m. For vortex number n=3 and above, we have found uniqueness violation: two different non-Abelian solutions with all the global charges equal. Finally, we have investigated the limit of infinite Higgs self-coupling parameter and found a piecewise Regge-like relation between the energy and the angular momentum.

关键词： HIGGS bosons NONABELIAN groups CHERN-Simons gauge theory POTENTIAL energy ANGULAR momentum (Nuclear physics) PARAMETER estimation ASYMPTOTIC efficiencies (Statistics)

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Two approaches to bounded model checking for linear time logic with knowledge

Two approaches to bounded model checking for linear time log...

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6th KES International Conference on Agent and Multi-Agent Systems: Technologies and Applications, KES-AMSTA 2012

作者： Mȩski, Artur Penczek, Wojciech Szreter, MacIej Woźna-Szcześniak, Bozena Zbrzezny, Andrzej Institute of Computer Science PAS Poland University of Natural Sciences and Humanities II Poland University of Lódź FMCS Poland Jan Dlugosz University IMCS Poland

ISBN: (纸本)9783642309465

The paper deals with symbolic approaches to bounded model checking (BMC) for Linear Time Temporal Logic extended with the epistemic component (LTLK), interpreted over Interleaved Interpreted Systems. Two translations of BMC for LTLK to SAT and to operations on BDDs are presented. The translations have been implemented, tested, and compared with each other as well as with another tool on several benchmarks for MAS. Our experimental results reveal advantages and disadvantages of SAT- versus BDD-based BMC for LTLK. © 2012 Springer-Verlag.

关键词： Temporal logic

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Trends in mobile Augmented Reality

Trends in mobile Augmented Reality

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IEEE Annual International Symposium Virtual Reality

作者： Dieter Schmalstieg Tobias Höllerer Institute for Computer Graphics and Vision Graz University of Technology Austria Department of Computer Science University of California Santa Barbara USA

This tutorial provides a detailed introduction to mobile Augmented Reality (AR). AR is a key user-interface technology for personalized, situated information delivery, navigation, on-demand instruction and games. The widespread availability and rapid evolution of smartphones enables software-only solutions for AR where it was previously necessary to assemble custom hardware solutions. However, ergonomic and technical limitations of smartphones as a platform make this a challenging endeavor. In particular, it is necessary to design novel efficient real-time computer vision and computer graphics algorithms, and create new lightweight forms of interaction with the environment through small form-factor devices. This tutorial will present selected technical achievements in this field and highlight some examples of successful application prototypes.

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