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Applied Mathematics(A Journal of Chinese Universities) 2014年第4期29卷 422-437页

作者： JI Zhong-ping LIU Li-gang KIM Deok-soo School of Computer Science and Technology Hangzhou Dianzi University Graphics Geometric Computing Laboratory School of Mathematical Sciences University of Science and Technology of China Department of Industrial Engineering Hanyang University

We present a novel armature structure for 3D articulated shapes, called SBall short for skeletal balls, which includes two parts： a one-dimensional skeleton and incident balls. Our algorithm mainly focuses on constructing the armature structure. This structure is based on an approximation skeleton which is homotopy equivalent to the shape. Each ball in the structure connects a skeletal joint and an interior region of the shape. The boundary vertices on the shape surface are attached onto the SBall using the power diagram of the ball set. A bilateral O^tering algorithm and a variational segmentation algorithm are proposed to enhance the quality of SBall. Finally, applications of this structure are discussed.

关键词： armature structure prong feature thinning variational segmentation.

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Comparison of E-Participation roadmap in industrial and developing countries based on Germany and Kenya 14

Comparison of E-Participation roadmap in industrial and deve...

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8th International Conference on Theory and Practice of Electronic Governance, ICEGOV 2014

作者： Burkhardt, Dirk Nazemi, Kawa Klamm, Christopher Kohlhammer, Jörn Kuijper, Arjan Fraunhofer Institute for Computer Graphics Research Darmstadt Germany Technische Universität Darmstadt Department of Computer Science Darmstadt Germany

ISBN: (纸本)9781605586113

This paper compares the E-Participation roadmaps of industrial and developing countries, based on Germany and Kenya as representatives. Therefore, the ICT roadmap of each country is de-scribed in a clear shape and with representative E-Participation projects of each country. Based on these projects, the comparison is performed on a categorical level in terms of (1) participation forms, (2) used ICT, and (3) socio-political requirements. After-wards, the results are summarized to determine an overall view on the E-Participation situation in both countries. As a result of the comparison similarities and significant differences will be identified. The results are useful for software developing organizations that want to create ICT governance tools for industrial as well as developing countries and therefore need to consider the characteristics and requirements of both country types. Copyright 2014 ACM.

关键词： Developing countries

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Designing and Evaluating Online Telehealth Systems for Seniors

Advances in Intelligent Systems and Computing

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Advances in Intelligent Systems and Computing 2014年 300卷 167-178页

作者： Dhillon, J.S. Wünsche, B.C. Lutteroth, C. Department of Graphics and Multimedia Universiti Tenaga Nasional 43000 Kajang Selangor Malaysia Department of Computer Science University of Auckland Private Bag 92019 Auckland New Zealand

The increasing cost of senior healthcare represents a serious challenge to most developed countries. Telehealth has been widely promoted as a technology to make healthcare more effective and affordable, however, current telehealth systems suffer from vendor lock-in and high cost, and are designed for managing chronic diseases rather than preventing them. We propose a novel framework for telehealth systems aimed at overcoming these shortcomings through principles such as extensibility, accessibility, social support and motivational feedback. The framework was employed to develop a patient-centric telehealth system, Healthcare4Life, which was evaluated in a user study to draw conclusions about the feasibility and acceptance of such a system by seniors. The results indicate that seniors are capable and motivated to use a web-based telehealth system if it provides suitable health applications. Furthermore, the results suggest that such a system has the potential to affect seniors' attitude towards their own health positively. © Springer International Publishing Switzerland 2014.

关键词： Online systems

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An interactive visualization for tabbed browsing behavior analysis

Communications in Computer and Information Science

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Communications in computer and Information science 2014年 458卷 69-84页

作者： Cernea, Daniel Truderung, Igor Kerren, Andreas Ebert, Achim Computer Graphics and HCI Group University of Kaiserslautern P.O. Box 3049 Kaiserslautern67653 Germany Computer Science Department ISOVIS Group Linnaeus University Vejdes Plats 7 Växjö35195 Sweden

ISBN: (纸本)9783662449103

Web browsers are at the core of online user experience, enabling a wide range of Web applications, like communication, games, entertainment, development, etc. Additionally, given the variety and complexity of online-supported tasks, users have started parallelizing and organizing their online browser sessions by employing multiple browser windows and tabs. However, there are few solutions that support analysts and casual users in detecting and extracting patterns from these parallel browsing histories. In this paper we introduce WebComets, an interactive visualization for exploring multi-session multi-user parallel browsing logs. After highlighting visual and functional aspects of the system, we introduce a motif-based contextual search for enabling the filtering and comparison of user navigation patterns. We further highlight the functionality of WebComets with a use case. Our investigations suggest that parallel browser history visualization can offer better insight into user tabbed browsing behavior and support the recognition of online navigation patterns. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Web browsers

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Thermal simulation of heterogeneous GaN/ InP/silicon 3DIC stacks

Thermal simulation of heterogeneous GaN/ InP/silicon 3DIC st...

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IEEE International Conference on 3D System Integration, 3DIC

作者： T. Robert Harris Eric J. Wyers Lee Wang Samuel Graham Georges Pavlidis Paul D. Franzon W. Rhett Davis North Carolina State University Raleigh NC US Department of Engineering and Computer Science Tarleton State University Stephenville TX USA Calibre Design Solutions Mentor Graphics Corporation Fremont CA USA Department of Mechanical Engineering Georgia Institute of Technology Atlanta GA USA Department of Electrical and Computer Engineering North Carolina State University Raleigh NC USA

Integration of materials such as GaN, InP, SiGe, and Si is a natural extension of the 3D-IC perspective and provides a unique solution for high performance circuits. In this approach, application of a component is no longer dependent on semiconductor material selection. In this paper, preliminary results are presented which examine the thermal performance of the technology. A thermal analysis prototype solution in Mentor graphics ™ Calibre ® provides surface heat maps based on IC layout, material property, and geometric configuration files. Chiplets are connected by heterogeneous interconnect (HIC). Differences in thermal performance of GaN and InP chiplets are explored by varying the number of HICs. Two methods for building up the model of a test chip are compared. One method uses custom scripts to place discrete blocks in the model to represent HICs, while the other uses thermal material properties extracted from the layout. Measurements presented confirm simulated results.

关键词： Semiconductor device modeling Gallium nitride Indium phosphide III-V semiconductor materials CMOS integrated circuits Layout Thermal conductivity

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Color skin segmentation based on non-linear distance metrics 19

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19th Iberoamerican Congress on Pattern Recognition, CIARP 2014

作者： Sobieranski, Antonio Carlos Chiarella, Vito F. Barreto-Alexandre, Eduardo Linhares, Rodrigo T. F. Comunello, Eros von Wangenheim, Aldo Federal University of Santa Catarina Laboratory of Image Processing and Computer Graphics Brazil Federal University of Parana Department of Informatics Brazil University of Sao Paulo Department of Computer Science Brazil

ISBN: (纸本)9783319125671

In this paper we present a semiautomatic method for skin identification in video sequences. The user trains the system by selecting in a frame some typical positive skin pixels, that will be used as a reference for the construction of a nonlinear distance metric. In this learning process the global optimum is obtained by induction employing higher polynomial terms of the Mahalanobis distance, extracting nonlinear features of the skin pattern distributions. These nonlinear features are then used to classify the frames captured from the camera, identifying all skin and non-skin regions on the scene. We adopt an estrategy which enables this method to run in real-time after some iteractions. We also compare our classification method against vector norm (L2) and Mahalanobis distance, showing a better classification for the skin patterns. © Springer International Publishing Switzerland 2014.

关键词： Artificial intelligence

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Supporting conversation and community interaction with a table-top community garden application 14

Supporting conversation and community interaction with a tab...

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3rd ACM International Symposium on Pervasive Displays, PerDis 2014

作者： Calderon, Roberto Blackstock, Michael Lea, Rodger Fels, Sidney Bueno, Andre O. Anacleto, Junia Media and Graphics Interdisciplinary Centre University of British Columbia Canada Computer Science Department University of São Carlos Brazil

ISBN: (纸本)9781450329521

Third places are social places like coffee shop and bars, where people come together to catch up with friends and meet new people. Our research explores how Ubiquitous Computing experiences in public space, particularly interactive public displays, can be leveraged to encourage interaction between strangers. We present a multi-display application based on the metaphor of a table-top community garden. This application is built using our Really Easy Displays (RED) framework, a set of web based technologies that allow the rapid development of applications that span multiple displays, sensors and actuators. The prototype makes use of a situated large screen, a projected surface and an Arduino microcontroller to support collaborative interaction, by al- lowing groups of people to collectively nurture a table-top garden by interacting with furniture, touch-enabled projections and mobile phones. Categories and Subject Descriptors H.4 [Information Systems Applications]: Miscellaneous.

关键词： Ubiquitous computing

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ISPD 2014 benchmarks with sub-45nm technology rules for detailed-routing-driven placement 14

ISPD 2014 benchmarks with sub-45nm technology rules for deta...

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2014 ACM International Symposium on Physical Design, ISPD 2014

作者： Yutsis, Vladimir Bustany, Ismail S. Chinnery, David Shinnerl, Joseph R. Liu, Wen-Hao Mentor Graphics Corporation Fremont CA United States Department of Computer Science National Tsing Hua University Hsinchu Taiwan

ISBN: (纸本)9781450325929

The public release of realistic industrial placement bench-marks by IBM and Intel Corporations from 1998-2013 has been crucial to the progress in physical-design algorithms during those years. Direct comparisons of academic tools on these test cases, including widely publicized contests, have spurred researchers to discover faster, more scalable algorithms with significantly improved quality of results. Nevertheless, close examination of these benchmarks reveals that the removal of important physical data from them prior to release now presents a serious obstacle to any ac-curate appraisal of the detailed routability of their placements. Recent studies suggest that academic placement algorithms may lack sufficient awareness of the pin geometry and routing rules missing from these benchmarks to adequately address the challenge of computing routable placements at 28nm-process technologies and below. In this article, the reconstitution of the existing bench-marks via the injection of realistic yet fictitious pin data and routing rules is described. The enhanced benchmarks enable more meaningful comparisons of new placement algorithms by industrial detailed routing, beginning with the 2014 ISPD placement contest.

关键词： detailed routing global routing placement routability placement evaluation

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Interactive diffraction from biological nanostructures 35

Interactive diffraction from biological nanostructures

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35th Annual Conference on European Association for computer graphics, EUROgraphics 2014

作者： Dhillon, D.S. Teyssier, J. Single, M. Gaponenko, I. Milinkovitch, M.C. Zwicker, M. Computer Graphics Group Institute of Computer Science and Applied Mathematics University of Bern Switzerland DMPC University of Geneva Geneva 4 Switzerland Department of Genetics and Evolution University of Geneva Geneva Switzerland

We describe a technique for interactive rendering of diffraction effects produced by biological nanostructures such as snake skin surface gratings. Our approach uses imagery from atomic force microscopy that accurately captures the nanostructures responsible for structural coloration, that is, coloration due to wave interference, in a variety of animals. We develop a rendering technique that constructs bidirectional reflection distribution functions (BRDFs) directly from the measured data and leverages precomputation to achieve interactive performance. We demonstrate results of our approach using various shapes of the surface grating nanostructures. Finally, we evaluate the accuracy of our precomputation-based technique and compare to a reference BRDF construction technique. © The Eurographics Association 2014.

关键词： Nanostructures

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Watermarking Marbled Image Based on Linear Enhancement Hologram

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Journal of Information Hiding and Multimedia Signal Processing 2014年第4期5卷 757-768页

作者： Dai, Junping Liu, Yazhong Lu, Jianfeng Xu, Jiayi Chang, Chin-Chen Lib, L. Institute of Digital Media Hangzhou Dianzi University Zhejiang China Institute of Graphics and Image Hangzhou Dianzi University Zhejiang China Department of Information Engineering and Computer Science Feng Chia University No. 100 Wenhwa Rd Seatwen Taichung40724 Taiwan Department of Computer Science and Information Engineering Asia University No. 500 Lioufeng Rd Wufeng Taichung41354 Taiwan

A marbled image is generated by performing marbling operations on an im- age. When the marbled image is recovered to the original image, the parameters of the marbling operations should be known in the decoding process. By embedding these into the marbled image, we can eliminate an additional internet transmission. This paper proposes a watermark algorithm for marbled images based on a linear enhancement holo- gram. First, the parameters of the marbling operations are converted into a QR code image. Second, the QR code image is used to create a hologram. Then, the hologram is linearly enhanced to form a watermark. Finally, the watermark can be embedded into the subband of the discrete wavelet transform of the marbled image using di_erent quan- tization embedding strengths. Experimental results showed that the algorithm has good invisibility and is robust to various attacks, including cropping, cutting, adding noise, JPEG compression, and _ltering. © 2014 ISSN 2073-4212.

关键词： Holograms

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