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Coding semantics of handwritten annotation

International Journal of Metadata, Semantics and Ontologies 2006年第3期1卷 216-223页

作者： Götze, Marcel Faculty of Computer Science University of Magdeburg Department of Simulation and Graphics 39106 Magdeburg Germany

In this paper we discuss a concept for the description of handwritten annotations in digital documents. It is focused on the metadata but also covers the storage of the annotation data itself. For the latter SVG is used that also support the description of information about the handwritten annotation like author, type, or the text it refers to. For this data a possible use of RDF and Dublin Core is introduced that can be included within the metadata element of SVG. Copyright © 2006 Inderscience Enterprises Ltd.

关键词： Semantics

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Combining training and computer-assisted planning of oncologic liver surgery

Combining training and computer-assisted planning of oncolog...

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Workshops Bildverarbeitung fur die Medizin: Algorithmen Systeme Anwendungen, BVM 2006 - Workshop on Image Processing for Medicine: Algorithms - Systems - Applications, BVM 2006

作者： Bade, Ragnar Riedel, Ivonne Schmidt, Lars Oldhafer, Karl J. Preim, Bernhard Department of Simulation and Graphics Faculty of Computer Science University of Magdeburg D-39106 Magdeburg Germany Department of General and Visceral Surgery General Hospital Celle D-29223 Celle Germany

ISBN: (纸本)9783540321361

We present a framework for liver surgery training with the focus on therapy decision making, tumor resection and ablation planning based on patient individual data. In this framework we combine state of the art planning facilities with components for training of oncologic liver surgery planning. Guide'n'Support , Intervention-Strategy- Sets, and Comparison-to-Experts-Plan functionality are implemented to enable guided training for young surgeons as well as open but on demand supported training for senior visceral surgeons.

关键词： Decision making

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computer games in supporting children's visual-spatial intelligence in teaching and learning environment 9

Computer games in supporting children's visual-spatial intel...

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9th International Conference on computer Games: AI, Animation, Mobile, Educational and Serious Games, CGAMES 2006

作者： Yatim, Maizatul H.M. Samsudin, Khairul Anuar Dept. of Simulation and Graphics Faculty of Computer Science University of Magdeburg Magdeburg39106 Germany Dept. of IT Education Faculty of ICT Sultan Idris University of Education Tg. Malim35900 Malaysia

ISBN: (纸本)0954901622

The educational software has tremendous value especially for helping to nurture children's intelligence. It is about time the educational technology looks into what have been offered by another increasing technology - the computer games. We present the significance of visual-spatial intelligence among children, especially in the domain of teaching and learning, which underpins the computer games technology. We relate the connection between children intelligence and the usage of educational games. Additionally, this paper will explore the potential impact of computer games on children that will embrace their visual-spatial intelligence and how these will affect the design and development of children educational software.

关键词： computer games

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Feasibility of the exact geometric computation paradigm for largest empty anchored cylinder computation in the plane 17

Feasibility of the exact geometric computation paradigm for ...

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17th Canadian Conference on Computational Geometry, CCCG 2005

作者： Schirra, Stefan Department of Simulation and Graphics Faculty of Computer Science Otto von Guericke University Magdeburg Magdeburg Germany

In the largest empty anchored cylinder problem one is looking for a ray anchored at the origin that maximizes the minimum (weighted) distance to a given set of points. For a set of n points in the plane, Follert et al. presented an optimal O(n log n) algorithm. We analyze the algebraic degree of the computations involved in their algorithm and show that it is much smaller than it looks at first sight. Indeed, a deliberate implementation of the optimal algorithm surprisingly avoids irrational number computations at all. Thus efficient exact geometric computation becomes feasible for this problem. © 2005 Canadian Conference on Computational Geometry. All rights reserved.

关键词： Cylinders (shapes)

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Illustrative visualization

Illustrative visualization

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VIS 05: IEEE Visualization 2005, Proceedings

作者： Viola, Ivan Gröller, Meister E. Hadwiger, Markus Bühler, Katja Preim, Bernhard Sousa, Mario Costa Ebert, David S. Stredney, Don Kanitsar, Armin Bruckner, Stefan Grimm, Sören Svakhine, Nikolai A. Jang, Yun Gaithert, Kelly Tietjen, Christian Krüger, Arno Peitgen, Heinz-Otto Isenberg, Tobias Hintze, Jana Hertel, Ilka Strauß, Gero Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Vienna Austria Department of Simulation and Graphics University of Magdeburg Germany Department of Computer Science University of Calgary Canada School of Electrical and Computer Engineering Purdue University United States Ohio Supercomputer Center United States Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Vienna Austria Electrical and Computer Engineering Purdue University United States IEEE Austria Department of Computer Science University of Calgary Canada Department of Computer Science Computer Graphics Research Lab. University of Calgary Canada Purdue University United States Ohio Supercomputer Center United States University of Texas Austin United States Interface Laboratory United States Biomedical Applications United States Department of Simulation and Graphics Otto-von-Guericke-University of Magdeburg Germany Otto-von-Guericke-University of Magdeburg FIN/ISG Germany Institute for Simulation and Graphics Department for Computer Science Otto-von-Guericke-University of Magdeburg Universitaetsplatz 2 39106 Magdeburg Germany Center for Medical Diagnosic Systems and Visualization Universitaetsallee 29 28359 Bremen Germany Department of Simulation and Graphics Otto-von-Guericke University of Magdeburg Germany ENT Department University Hospital of Leipzig Germany

ISBN: (纸本)0780394623

The tutorial presents state-of-the-art visualization techniques inspired by traditional technical and medical illustrations. Such techniques exploit the perception of the human visual system and provide effective visual abstractions to make the visualization clearly understandable. Visual emphasis and abstraction has been used for expressive presentation from prehistoric paintings to nowadays scientific and medical illustrations. Many of the expressive techniques used in art are adopted in computer graphics, and are denoted as illustrative or non-photorealistic rendering. Different stroke techniques, or brush properties express a particular level of abstraction. Feature emphasis or feature suppression is achieved by combining different abstraction levels in illustrative rendering. Challenges in visualization research are very large data visualization as well as multi-dimensional data visualization. To effectively convey the most important visual information there is a significant need for visual abstraction. For less relevant information the dedicated image space is reduced to enhance more prominent features. The discussed techniques in the context of scientific visualization are based on iso-surfaces and volume rendering. Apart from visual abstraction, i.e., illustrative representation, the visibility of prominent features can be achieved by illustrative visualization techniques such as cut-away views or ghosted views. The structures that occlude the most prominent information are suppressed in order to clearly see more interesting parts. A different smart way to provide information on the data is using exploded views or other types of deformation. Furthermore intuitive feature classification via 3D painting and manipulation with the classified data including label placement is presented. Discussed non-photorealistic and illustrative techniques from visualization and graphics are shown from the perspective as tools for illustrators from medicine, botany, archeology

关键词： Visualization

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On-line conservative learning for person detection

On-line conservative learning for person detection

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2nd Joint IEEE International Workshop on Visual Surveillance and Performance Evaluation of Tracking and Surveillance, VS-PETS

作者： Roth, Peter M. Grabner, Helmut Skočaj, Danijel Bischof, Horst Leonardis, Aleš Graz University of Technology Institute for Computer Graphics and Vision Inffeldgasse 16/11 8010 Graz Austria University of Ljubljana Faculty of Computer and Information Science Tržaška 25 SI-1001 Slovenia

ISBN: (纸本)0780394240

We present a novel on-line conservative learning framework for an object detection system. All algorithms operate in an on-line mode, in particular we also present a novel on-line AdaBoost method. The basic idea is to start with a very simple object detection system and to exploit a huge amount of unlabeled video data by being very conservative in selecting training examples. The key idea is to use reconstructive and discriminative classifiers in an iterative co-training fashion to arrive at increasingly better object detectors. We demonstrate the framework on a surveillance task where we learn person detectors that are tested on two surveillance video sequences. We start with a simple moving object classifier and proceed with incremental PCA (on shape and appearance) as a reconstructive classifier which in turn generates a training set for a discriminative on-line AdaBoost classifier. © 2005 IEEE.

关键词： Object recognition

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On-line Conservative Learning for Person Detection

On-line Conservative Learning for Person Detection

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Joint IEEE International Workshop on Visual Surveillance and Performance Evaluation of Tracking and Surveillance

作者： P.M. Roth H. Grabner H. Bischof D. Skocaj A. Leonardist Graz University of Technology Institute for Computer Graphics and Vision Austria Faculty of Computer and Information Science University of Ljubljana Slovenia

We present a novel on-line conservative learning framework for an object detection system. All algorithms operate in an on-line mode, in particular we also present a novel on-line AdaBoost method. The basic idea is to start with a very simple object detection system and to exploit a huge amount of unlabeled video data by being very conservative in selecting training examples. The key idea is to use reconstructive and discriminative classifiers in an iterative co-training fashion to arrive at increasingly better object detectors. We demonstrate the framework on a surveillance task where we learn person detectors that are tested on two surveillance video sequences. We start with a simple moving object classifier and proceed with incremental PCA (on shape and appearance) as a reconstructive classifier, which in turn generates a training set for a discriminative on-line AdaBoost classifier

关键词： Object detection Visual system Surveillance computer vision Robustness Detectors Layout computer science education Educational programs Educational technology

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New Developments in High-level Continuous Systems simulation Languages

New Developments in High-level Continuous Systems Simulation...

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Asian simulation Conference/The 6th International conference on system simulation and Scientific Computing

作者： HUNTSINGER Ralph C. Faculty of Computer Science Bialystok Technical University POLAND and McLeod Institute of Simulation Sciences (MISS) College of Engineering Computer Science and Technology California State University Chico USA Faculty of Computer Science Bialystok Technical University POLAND and McLeod Institute of Simulation Sciences (MISS) College of Engineering Computer Science and Technology California State University Chico USA

High-level continuous systems simulation languages are application-oriented software systems designed to assist Engineers and Scientists to mathematically model and analyze the behavior of piecewise-continuous systems described by differential equations. For the system analyst, these languages provide a straight forward, easy to use analytical tool for the simulation of dynamic systems. Powerful systems-oriented functions coupled with extensive man-machine inter-active capabilities allow the user to concentrate on his/her simulation studies with minimal burden from the computer system. computer simulation can be used to represent in great detail the performance of "real world" systems which are often very complex (e.g. space craft, control systems, mechanical and electrical systems, etc.) and simulation may be used as an aid to design, to diagnose the cause of system malfunction, to evaluate performance under fault conditions, for operator training, as embedded systems for predictive control, or to gain a deeper understanding of the dynamics of an existing or proposed dynamic system.

关键词： languages software simulation continuous

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Impurity effect in the quantum nernst effect

Impurity effect in the quantum nernst effect

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作者： Shirasaki, Ryoen Nakamura, Hiroaki Hatano, Naomichi Department of Physics Faculty of Engineering Yokohama National University Tokiwadai 79-5 Hodogaya-ku Yokohama 240-8501 Japan Theory and Computer Simulation Center National Institute for Fusion Science Oroshi-cho 322-6 Toki Gifu 509-5292 Japan Institute of Industrial Science University of Tokyo Komaba 4-6-1 Meguro Tokyo 153-8505 Japan

We theoretically study the Nernst effect and the Seebeck effect in a two-dimensional electron gas in a strong magnetic field and a temperature gradient under adiabatic condition. We recently predicted for a pure system in the quantum Hall regime that the Nernst coefficient is strongly suppressed and the thermal conductance is quantized due to quantum ballistic transport. Taking account of impurities, we here compute the Nernst coefficient and the Seebeck coefficient when the chemical potential coincides with a Landau level. We adopt the self-consistent Born approximation and consider the linear transport equations of the thermal electric transport induced by the temperature gradient. The thermal conductance and the Nernst coefficient are slightly modified from the pure case and the Seebeck coefficient newly appears because of the impurity scattering of electrons in the bulk states. © 2005 The Surface science Society of Japan.

关键词： Quantum theory

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Heterogeneous objects modelling and rendering using implicit complexes

Heterogeneous objects modelling and rendering using implicit...

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International Conference on Information Visualisation (IV)

作者： E. Kartasheva V. Adzhiev P. Comninos A. Pasko B. Schmitt Institute for Mathematical Modeling Russian Academy of Science Moscow Russia The National Centre for Computer Animation Bournemouth University Poole UK Faculty of Computer and Information Sciences Hosei University Tokyo Japan Computer Graphics Research Institute Hosei University Tokyo Japan

This paper describes a technology for modelling and rendering heterogeneous objects containing entities of various dimensionalities within a cellular-functional framework based on the implicit complex notion. Implicit complexes make it possible to combine a cellular representation and a constructive function representation. We describe a formal framework for such a hybrid representation and propose a general structure for implicit complexes. Then, we consider how an implicit complex can be described geometrically and topologically along with its associated attributes. Rendering algorithms for implicit complexes using ray-tracing are also discussed. Finally, we present a case study illustrating the proposed methods and algorithms.

关键词： Water heating Mathematical model Solids Biological materials Geometry Topology Spirals Animation computer graphics Nonhomogeneous media

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