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Combining sound localization and laser-based object recognition

Combining sound localization and laser-based object recognit...

引用

2007 AAAI Spring Symposium

作者： Calmes, Laurent Wagner, Hermann Schiffer, Stefan Lakemeyer, Gerhard Institute for Biology II Department of Zoology and Animal Physiology RWTH Aachen University 52056 Aachen Germany Knowledge-based Systems Group Department of Computer Science 5 RWTH Aachen University 52056 Aachen Germany

ISBN: (纸本)9781577353164

Mobile robots, in general, and service robots in human environments, in particular, need to have versatile abilities to perceive and interact with their environment. Biologically inspired sound source localization is an interesting ability for such a robot. When combined with other sensory input both the sound localization and the general interaction abilities can be improved. In particular, spatial filtering can be used to improve the signal-to-noise ratio of speech signals emanating from a given direction in order to enhance speech recognition abilities. In this paper we investigate and discuss the combination of sound source localization and laser-based object recognition on a mobile robot.

关键词： Acoustic wave propagation

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Emotion in HCI

Emotion in HCI

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21st British HCI Group Annual Conference: People and computers XXI HCI.But Not as We Know It, HCI 2007

作者： Peter, Christian Beale, Russell Crane, Elizabeth Axelrod, Lesley Fraunhofer Institute for Computer Graphics Joachim Jungius Str. 11 Germany School of Computer Science University of Birmingham Edgbaston Birmingham United Kingdom University of Michigan Division of Kinesiology 401 Washtenaw Ave. Ann Arbor MI 48108 United States Department of Information Systems and Computing Brunel University UB8 3PH United Kingdom

ISBN: (纸本)9781902505954

An increasing number of conferences, symposia, workshops, journals and books address the subject of emotions and their role in Human-computer Interaction, including workshops at the last two HCI conferences. The need for discussion, exchange of ideas, and interdisciplinary collaboration is ever-increasing as the community grows. This workshop will meet the requirements of individuals working in fields affected by emotion, giving them a podium to raise their questions and work with like-minded people of various disciplines on common subjects. It will focus around four sessions, and will use predominantly small group work, rather than being presentation-based. © 2007, Christian Peter, Russell Beale, Elizabeth Crane & Lesley Axelrod.

关键词： Human computer interaction

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Knowledge representation using multilevel hierarchical model in intelligent tutoring system

Knowledge representation using multilevel hierarchical model...

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3rd IASTED International Conference on Advances in computer science and Technology, ACST 2007

作者： Siddappa, M. Manjunath, A.S. Department of Computer Science and Engineering Sri Siddhartha Institute of Technology Tumkur- 572105 Karnataka India Ltd. No.502 Prestige Meridian - II30 M.G.Road Bangalore- 560 001 Karnataka India

ISBN: (纸本)9780889866560

The emergence of Intelligent Tutoring System (ITS) has opened up new avenues for the use of computers in education. ITSs are able to tackle difficult instructional problems and extend the usefulness of the computer as an instructional tool. This paper presents the work done on some aspects of the design and implementation of ITSs. A didactic attempt has been made to design the tutors with dynamic adaptive behavior. A multilevel hierarchical model has been developed for the representation of domain knowledge based on various aptitude levels of students. The work also describes student modeling principles using aptitude and action level identification and overlay methods.

关键词： Knowledge representation

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A POWERFUL STRATEGY FOR SEGMENTING INTERDIGITATED AND CRIMPED FIBER BUNDLES IN BIOLOGICAL SOFT TISSUES

A POWERFUL STRATEGY FOR SEGMENTING INTERDIGITATED AND CRIMPE...

引用

IEEE International Symposium on Biomedical Imaging

作者： P.J. Elbischger H. Bischof Medical Information Technology University of Applied Sciences of Upper Austria Klagenfurt Austria Austria Institute for Computer Graphics and VisionInffeldgasse 16/II Graz University of Technology Graz Austria

ISBN: (纸本)9781424406715;1424406714

Biological soft tissues such as tendons, ligaments, articular cartilages and blood vessels consist of collagen fibers that may form collagen fiber bundles (CFBs). In order to develop reliable biomechanical models, it is crucial to have a tool available for the identification of the structural arrangement of CFBs in soft tissue. The task of bundle segmentation becomes quite difficult if the bundles touch each other, show a significant fiber crimp and are only partially visible. A strong fiber crimp leads to high-variance local orientations within a bundle that considerably complicate the bundle segmentation. Straightforward segmentation that combines regions of similar local orientations will fail. In this work we propose a fully automatic vision algorithm that is able to segment even strongly crimped and densely arranged but linearly oriented CFBs

关键词： Biological tissues Image segmentation Character generation Microscopy computer vision Discrete Fourier transforms Stochastic processes Cutoff frequency Information technology Biology

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Texture-based visualization of unsteady 3d flow by real-time advection and volumetric illumination

Texture-based visualization of unsteady 3d flow by real-time...

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作者： Weiskopf, Daniel Schafhitzel, Tobias Ertl, Thomas IEEE Computer Society Graphics Visualization and Usability Lab. School of Computing Science Simon Fraser University Burnaby BC V5A 1S6 Canada Institute of Visualization and Interactive Systems University of Stuttgart Universitätsstr. 38 70569 Stuttgart Germany

This paper presents an interactive technique for the dense texture-based visualization of unsteady 3D flow, taking into account issues of computational efficiency and visual perception. High efficiency is achieved by a 3D graphics processing unit (QPU)-based texture advection mechanism that implements logical 3D grid structures by physical memory in the form of 2D textures. This approach results in fast read and write access to physical memory, independent of GPU architecture. Slice-based direct volume rendering is used for the final display. We investigate two alternative methods for the volumetric illumination of the result of texture advection: First, gradient-based illumination that employs a real-time computation of gradients, and, second, line-based lighting based on illumination in codimension 2. In addition to the Phong model, perception-guided rendering methods are considered, such as cool/warm shading, halo rendering, or color-based depth cueing. The problems of clutter and occlusion are addressed by supporting a volumetric importance function that enhances features of the flow and reduces visual complexity in less interesting regions. GPU implementation aspects, performance measurements, and a discussion of results are included to demonstrate our visualization approach. © 2007 IEEE.

关键词： Data visualization

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Let's get emotional: Emotion research in human computer interaction

Let's get emotional: Emotion research in human computer inte...

引用

25th SIGCHI Conference on Human Factors in Computing Systems 2007, CHI 2007

作者： Crane, Elizabeth A. Shami, N. Sadat Peter, Christian University of Michigan Division of Kinesiology 401 Washtenaw Ave. Ann Arbor MI 48109-2214 United States Information Science Program Cornell University Ithaca NY 14850 United States Fraunhofer Institute for Computer Graphics Joachim Jungius Str. 11 18059 Rostock Germany

ISBN: (纸本)1595936424

Emotion is a topic of growing interest in the HCI community. Studying emotion within the HCI discipline is an exciting interdisciplinary task. This can be facilitated by the exchange of thoughts and ideas with others working on related projects. The aim of this SIG is to bring together an interdisciplinary group of researchers and practitioners actively working on projects where emotion is an essential component. The goals of the SIG are to identify current themes related to emotion specific HCI work and discuss strategies for moving forward.

关键词： Human computer interaction

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Contour Detection of the Cornea from OCT Radial Images

Contour Detection of the Cornea from OCT Radial Images

引用

29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBS 2007), vol.14

作者： Florian Graglia Jean-Luc Mari Georges Baikoff Jean Sequeira Information and System Science Laboratory (LSIS) Computer Graphics Department (Image & Modèle) Faculté des Sciences de Luminy in Marseille University of Marseille II France Ophthalmologist in Marseille France

In this paper, we present a new approach for contour detection in the frame of OCT images of the cornea. With the aim of detecting upper and lower curves that define the cornea in radial slices, we have elaborated a three step specific method. The first step consists in finding epithelium and endothelium points (we call them anchor points). Then the image is preprocessed to enhance the contrast and to reduce speckle. In the final step both anchor points are used as starting points for the algorithm: we trace the contour of the cornea pixel by pixel from these two points with a weight criterion. Taking into account geometrical knowledge of the cornea enhances the robustness of the technique. We validate our approach on a bank of scans including low quality images.

关键词： Cornea Optical noise Speckle Optical interferometry Hysteresis Image segmentation Adaptive optics Biomedical optical imaging Optical refraction Tomography

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Parallel genomic sequence-search on a massively parallel system

Parallel genomic sequence-search on a massively parallel sys...

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4th Conference On Computing Frontiers 2007

作者： Thorsen, Oystein Smith, Brian Sosa, Carlos P. Jiang, Karl Lin, Heshan Peters, Amanda Feng, Wu-Chun IBM Rochester 3605 HWY 52N Rochester MN 55901 United States IBM University of Minnesota Supercomputing Institute 117 Pleasant Street South Minneapolis MN 55455 United States North Carolina State University Department of Computer Science 3226 EB II Raleigh NC 27695 United States Virginia Tech. Department of Computer Science 2202 Kraft Drive 209 KWII Blacksburg VA 24060 United States

ISBN: (纸本)1595936831

In the life sciences, genomic databases for sequence search have been growing exponentially in size. As a result, faster sequencesearch algorithms to search these databases continue to evolve to cope with algorithmic time complexity. The ubiquitous tool for such search is the Basic Local Alignment Search Tool (BLAST) [1] from the National Center for Biotechnology Information (NCBI). Despite continued algorithmic improvements in BLAST, it cannot keep up with the rate at which the database is exponentially increasing in size. Therefore, parallel implementations such as mpiBLAST have emerged to address this problem. The performance of such implementations depends on a myriad of factors including algorithmic, architectural, and mapping of the algorithm to the architecture. This paper describes modifications and extensions to a parallel and distributed-memory version of BLAST called mpiBLAST-PIO and how it maps to a massively parallel system, specifically IBM Blue Gene/L (BG/L). The extensions include a virtual file manager, a "multiple master" runtime model, efficient fragment distribution, and intelligent load balancing. In this study, we have shown that our optimized mpiBLAST-PIO on BG/L using a query with 28014 sequences and the NR and NT databases scales to 8192 nodes (two cores per node). The cases tested here are well suited for a massively parallel system. Copyright 2007 ACM.

关键词： Parallel processing systems

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Chip-last Embedded Active for System-On-Package (SOP)

Chip-last Embedded Active for System-On-Package (SOP)

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Electronic Components and Technology Conference (ECTC)

作者： Baik-Woo Lee Venky Sundaram Boyd Wiedenman Chong K Yoon Vaidyanathan Kripesh Mahadevan Iyer Rao R Tummala Packaging Research Center School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA Singapore Science Park II Institute of Microelectronics Singapore Singapore

Embedded active technology, in which thinned active chips are directly buried into a core or high-density-interconnect layers, is gaining more interest for ultra-miniaturization, increased functionality and better performance of SOP (system-on-package). In this study, chip-last embedded active concept is proposed to address some of process and reliability issues that current chip-first and chip-middle embedded active approaches have. The detailed process development for the first prototype of chip-last embedded active is described in this paper.

关键词： Packaging Substrates Plastics Space technology Integrated circuit interconnections Thermal stresses Radio frequency Microelectronics Prototypes Nonhomogeneous media

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Graceful anytime interruptibility for virtual agents

Graceful anytime interruptibility for virtual agents

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4th International Conference on Advances in computer Entertainment Technology, ACE 2007

作者： Brügmann, Klaus Prendinger, Helmut Stamminger, Marc Ishizuka, Mitsuru Friedrich-Alexander-Univ. Erlangen-Nürnberg Computer Graphics Group Am Weichselgarten 9 91058 Erlangen Germany National Institute of Informatics 2-1-2 Hitotsubashi Chiyoda-ku Tokyo 101-8430 Japan Graduate School of Information Science and Technology Univ. of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan

ISBN: (纸本)1595936408

The demo will show two highly expressive virtual agents introducing the audience to a traditional Japanese room. The agent models and gestures have been created by a professional Japanese character designer. By adapting and extending an influential technique ("Verbs and Adverbs"), we added parameterized emotional expression and gesture interruptibility as new behaviors to increase agent believability, interactivity, and responsiveness. In the demo, users will be provided a simple interface to test the new features.

关键词： Virtual reality

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