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Conference on human Factors in Computing Systems, CHI EA 2006

作者： Shneiderman, Ben Bishop, Ann Friedman, Batya Lazar, Jonathan Marsden, Gary Nass, Cliff Jones, Matt Department of Computer Science Univ. of Maryland College Park MD 20742 United States Graduate School of Library and Information Science University of Illinois Champaign IL 61820 United States Information School Univ. of Washington Seattle WA 98195 United States Department of Computer and Information Sciences Towson Univ. 8000 York Road Towson MD 21252 United States Department of Computer Science Univ. of Cape Town Cape Town 7701 South Africa Center for the Study of Language and Information Stanford University McClatchy Hall Stanford CA 94305 United States Future Interaction Technology Lab University of Swansea United Kingdom

ISBN: (纸本)1595932984

Enriching courses on human-computer interaction with socially-relevant projects provides a compelling opportunity for students to improve their education and make socially beneficial contributions. By having clearly defined user communities outside the classroom, students have the chance to practice their interview, observation, and usability testing skills, while developing projects that continue beyond the semester. These projects often give students life-changing exposure to genuine needs and impressive results to include in their portfolio when seeking employment. Educators will present their strategies for arranging, supervising, and grading these projects. Students will describe their experience and how it influenced them.

关键词： Students

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A Model for Interoperability in computer Supported Collaborative Learning

A Model for Interoperability in Computer Supported Collabora...

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International Conference on Advanced Learning Technologies (ICALT)

作者： G. Kahrimanis A. Papasalouros N. Avouris S. Retalis Human-Computer Interaction Group ECE Department University of Patras Greece Software Engineering Lab National and Technical University of Athens Greece Department of Technology Education and Digital Systems University of Piraeus Greece

computer supported collaborative learning activities involve combination of complex software tools that often need to interoperate in a wider context of learning. This paper proposes a data model that accommodates requirements of typical collaborative learning situations and facilitates interoperability of tools and interchange of products of collaboration and evaluation data. The model has been tested against various typical tools used for both synchronous and asynchronous collaboration of groups of students

关键词： Collaborative work Collaborative tools Data models Pervasive computing Software engineering Educational technology computer science education Systems engineering education Digital systems Software tools

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Real-time haptic incision simulation using FEM-based discontinuous free form deformation 06

Real-time haptic incision simulation using FEM-based discont...

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SPM 2006 - ACM Symposium on Solid and Physical Modeling

作者： Sela, Guy Subag, Jacob Lindblad, Alex Albocher, Dan Schein, Sagi Elber, Gershon Department of Computer Science Technion - Israel Institute of Technology Haifa 32000 Israel Human Interface Technology Lab. University of Washington PO Box 352142 Seattle WA 98195-2142 United States Department of Civil and Environmental Engineering University of Washington PO Box 352700 Seattle WA 98195-2700 United States

ISBN: (纸本)1595933581

computer-aided surgical simulation is a topic of increasingly extensive research. computer graphics, geometric modeling and finite-element analysis all play major roles in these simulations. Furthermore, real-time response, interactivity and accuracy are crucial components in any such simulation system. A major effort has been invested in recent years to find ways to improve the performance, accuracy and realism of existing systems. In this paper, we extend the work of [Sela et al. 2004], in which we used Discontinuous Free Form Deformations (DFFD) to artificially simulate real-time surgical operations. The presented scheme now uses accurate data from a Finite-Element Model (FEM), which simulates the motion response of the tissue around the scalpel, during incision. The data is then encoded once into the DFFD, representing the simulation over time. In real-time, The DFFD is applied to the vertices of the surface mesh at the actual incision location and time. The presented scheme encapsulates and takes advantage of both the speed of the DFFD application, and the accuracy of a FEM. In addition, the presented system uses a haptic force feedback device in order to improve realism and ease of use. © 2006 ACM.

关键词： Real time systems

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Collaborative coupling over tabletop displays 06

Collaborative coupling over tabletop displays

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CHI 2006: Conference on human Factors in Computing Systems

作者： Tang, Anthony Tory, Melanie Po, Barry Neumann, Petra Carpendale, Sheelagh Human Communication Technologies Lab. University of British Columbia 2366 Main Mall Vancouver BC V6T 1Z4 Canada Department of Computer Science University of British Columbia 2366 Main Mall Vancouver BC V6T 1Z4 Canada Department of Computer Science University of Calgary 2500 University Dr. NW Calgary Alta. T2N 1N4 Canada

ISBN: (纸本)1595931783

Designing collaborative interfaces for tabletops remains difficult because we do not fully understand how groups coordinate their actions when working collaboratively over tables. We present two observational studies of pairs completing independent and shared tasks that investigate collaborative coupling, or the manner in which collaborators are involved and occupied with each other's work. Our results indicate that individuals frequently and fluidly engage and disengage with group activity through several distinct, recognizable states with unique characteristics. We describe these states and explore the consequences of these states for tabletop interface design. Copyright 2006 ACM.

关键词： human computer interaction

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SUPPORTING SELF-DIRECTED LEARNERS AND LEARNING COMMUNITIES WITH SOCIOTECHNICAL ENVIRONMENTS

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Research and Practice in Technology Enhanced Learning 2006年第1期1卷 31-64页

作者： GERHARD FISCHER MASANORI SUGIMOTO Center for LifeLong Learning and Design (L3 D) Department of Computer Science University of Colorado 430 UCB Boulder CO 80309-0430 USA Interaction Technology Lab. Department of Frontier Sciences University of Tokyo 5-1-5 Kashiwanoha Kashiwa Chiba 277-8561 Japan

Making learning part of life is an essential challenge for inventing the future of our societies. Lifelong learning is a necessity rather than a possibility or a luxury to be considered. Self-directed learning (often occurring as learning on demand in response to breakdowns) is the dominant form of lifelong learning. The power of the unaided individual mind is highly overrated. Although society often thinks of creative individuals as working in isolation, learning and creativity result in large part from the interaction and collaboration with other individuals. Much human creativity is social, and learning communities are needed to cope with the challenges of making learning part of life. This paper articulates existing problems in our current and future world requiring lifelong and self-directed learning and learning communities. It defines conceptual frameworks and it describes four innovative computational environments: (1) domain-oriented design environments, (2) critiquing systems, (3) the Envisionment and Discovery Collaboratory, and (4) Caretta. The paper concludes by providing a set of challenges for the future use of technology to enhance learning based on the conceptual frameworks and the experience and assessment of our system development efforts.

关键词： Self-directed learning lifelong learning learning on demand collaborative learning integration of working and learning critiquing breakdowns simulation change symmetry of ignorance gift-wrapping approach of using technology sociotechnical environments meta-design

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Vertical Vergence Calibration for Augmented Reality Displays

Vertical Vergence Calibration for Augmented Reality Displays

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IEEE Annual International Symposium Virtual Reality

作者： M.A. Livingston S.R. Ellis S.M. White S.K. Feiner A. Lederer Adam Lederer Naval Research Laboratory USA Virtual Reality Lab Naval Research Laboratory Inc. USA Human Information Processing Research Branch NASA Ames Research Center Human Information Processing Research Branch NASA Ames Research Center USA Department of Computer Science Columbia University Department of Computer Science Columbia University USA

Stereo and bi-ocular head-mounted displays (HMDs) require the user to fuse two images into a coherent picture of the threedimensional world. The human visual system performs this task constantly, but when the input images contain both real and graphical depictions, the problem becomes more difficult. A vertical disparity in the graphics causes diplopia for users trying to fuse the real and virtual objects simultaneously. We implement three methods to measure and correct this disparity and assess them with a collection of a single model of optical see-through HMD.

关键词： Calibration Augmented reality Fuses Eyes computer displays humans Visual system computer graphics Image segmentation Virtual reality

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New region-based surveillance scheme for high-way multi-vehicle recognition and tracking

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Guangdian Gongcheng/Opto-Electronic Engineering 2006年第6期33卷 20-23页

作者： Cai, Xun Meng, Xiang-Xu Liu, Qiang Human-interaction and Virtual-reality Research Department School of Computer Science and Technology Shandong University Jinan 250061 China Information Management General Center Shandong Expressway Group Co. LTD Jinan 250002 China

This paper provides a new region-based high-way multi-vehicle surveillance system scheme. The contribution of this system includes a modified adaptive Gaussian background model, a non-recursive region-growth algorithm for multi-vehicle recognition, and a color-based predictive rule for multi-vehicle tracking. Since the high-way images are usually strongly disturbed, a modified region-based Gaussian background model is presented in order to remove much heavy noises and small disturbing regions. To build this model, we first used several background imaging samples to get the disturbed regions by background subtraction technique, and then computed the statistic values of the size of disturbed regions as the parameters of this region-based Gaussian background model. In order to reduce the effect of daylight and be updated adaptively, we also applied a weighted iterative algorithm based on Kalman filter theory. A modified non-recursive region-growth algorithm is presented for multi-vehicle recognition whose computational complexity can be only O(n), and a color-based predictive rule is also proposed for multi-vehicle tracking which is very easy to implement. At last, the experimental results show that this system can achieve multi-vehicle recognition and tracking robustly and adaptively.

关键词： Background modeling Kalman filter Region-growth algorithm Vehicle tracking

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Preface

Proceedings - Graphics Interface

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Proceedings - Graphics Interface 2006年 2006卷 V页

作者： Mann, Stephen Gutwin, Carl CGL David R. Cheriton School of Computer Science University of Waterloo Canada Interaction Lab. Department of Computer Seience Universtiy of Saskatchewan Canada

No abstract available

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Benefits of merging command selection and direct manipulation

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ACM Transactions on computer-human interaction 2005年第3期12卷 460-476页

作者： Guimbretière, François Martin, Andrew Winograd, Terry University of Maryland Stanford University Human Computer Interaction Laboratory Department of Computer Science University of Maryland College Park MD 20742 Department of Computer Science Stanford University Stanford CA 94305-9035

Toolglass [Bier et al. 1993] demonstrated a two-handed command selection technique that combined command selection and direct manipulation. While empirical evaluations showed a speed advantage for ToolGlass, they did not examine the relative importance of two possible factors in its improved performance: (1) the use of two hands and (2) the merging of command selection and direct manipulation. We conducted a study comparing the relative benefits of three command selection techniques that merge command selection and direct manipulation: one two-handed technique, Toolglass, and two one-handed techniques, namely, control menus [Pook et al. 2000] and FlowMenu [Guimbretière and Winograd 2000], Participants performed sequences of operations that required both selecting a color and designating the endpoints of a line. Our results show that control menus and FlowMenu are significantly faster than Toolglass. Further analysis suggests that the merging of command selection and direct manipulation is the most important factor in the performance of all three techniques. © 2005 ACM.

关键词： human computer interaction

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ISonic: Interactive sonification for non-visual data exploration

ISonic: Interactive sonification for non-visual data explora...

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ASSETS 2005 - The Seventh International ACM SIGACCESS Conference on computers and Accessibility

作者： Zhao, Haixia Plaisant, Catherine Shneiderman, Ben Department of Computer Science Human-Computer Interaction Lab. University of Maryland College Park MD United States Human-Computer Interaction Lab. University of Maryland College Park MD United States

ISBN: (纸本)1595931597

iSonic is an interactive sonification tool for vision impaired users to explore geo-referenced statistical data, such as population or crime rates by geographical regions. Users use a keyboard or a smooth surface touchpad to interact with coordinated map and table views of the data. The integrated use of musical sounds and speech allows users to grasp the overall data trends and to explore the data to get more details. Scenarios of use are described.

关键词： Interactive computer graphics

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