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作者： Herman, Gabor T. Kuba, Attila Department of Computer Science Graduate Center City University of New York New York NY 10016 United States Department of Image Processing and Computer Graphics University of Szeged Szeged Hungary

Discrete tomography (DT) deals with the reconstruction of a function from its projections, when the function has a known discrete range. The knowledge of the discrete range, possibly together with some prior information, can significantly reduce the number of projections required for a high-quality reconstruction. The reconstruction methods used in DT applications are usually based on some formulation as an optimization problem. This paper presents methods and results of DT based on problems of angiography, emission tomography, and electron microscopy (EM). © 2003 IEEE.

关键词： computerized tomography

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Shaping the ambience of homes with domestic hypermedia

Shaping the ambience of homes with domestic hypermedia

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2nd European Symposium on Ambient Intelligence, EUSAI 2004

作者： Petersen, Marianne Graves Grønbæk, Kaj Center for Interactive Spaces Department of Computer Science University of Aarhus Åbogade 34 Århus NDK-8200 Denmark

ISBN: (纸本)3540237216

We currently witness a massive digitization of domestic materials e.g. photos, music, calendars, recipes, notes, messages. This digitization provides new conditions for how we interact with materials as well as how users shape the ambience of their homes. Observing the qualities of physical materials in the home, the process of digitization risks loosing the qualities of the spatial distribution, the aesthetics, and common reference points offered by physical materials and places in the home. We present a concept of domestic hypermedia (DoHM), which exploits potentials of digital materials and at the same time allow people to interact with digital materials in engaging ways providing rich experiences when organizing and using digital materials in homes. We present an infrastructure and design concepts that offer: ambient access to digital materials, common reference points, and collective experiences. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Augmented reality

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E-stadium: Real-time game statistics, highlights, and entertainment

E-stadium: Real-time game statistics, highlights, and entert...

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113th Annual ASEE Conference and Exposition, 2006

作者： Glotzbach, Ronald Bingham, Nathan Ren, Meiqi Mordkovich, Dorina Purdue University United States Department of Interactive Multimedia Development Department of Computer Graphics Technology Purdue University's West Lafayette Campus Portugal ITaP Purdue University's Continuing Education and Conferences Division Portugal Department of Computer Graphics Technology Purdue United States Purdue's Envision Center for Data Perceptualization United States

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T-EDUCO: A t-learning tutoring tool that cares

T-EDUCO: A t-learning tutoring tool that cares

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作者： Hupont, Isabelle Abadía, David Baldassarri, Sandra Cerezo, Eva Del-Hoyo, Rafael Interactive Audiovisual Technologies Center Aragon Institute of Technology Huesca Spain Computer Science and Systems Engineering Department University of Zaragoza Zaragoza Spain

interactive Digital Television is emerging as a potential medium to create opportunities for learning at home. In most existing t-learning (TV-based interactive learning) applications, the interaction with the user is limited to a simple sequential navigation within the application. And, since the educational contents are broadcast, there is no feedback from the student's progress. More engaged and intelligent t-learning interactive applications are needed to achieve more efficient forms of learning. This paper presents T-EDUCO, the first t-learning affective aware tutoring tool. T-EDUCO goes further than simply broadcasting an interactive educational application by allowing the figure of a tutor to be present and to govern the students' learning process. The tutor can access academic and emotional information about the students through a continuous "emotional path" that includes timestamps and information about the progress made in each exercise. In this way, personal messages or extra educational contents for improving learning can be sent to the students. The emotional information is extracted by a novel Artificial Intelligence method that evaluates with a 2-dimensional affective approach the students' facial expressions captured through a camera while performing the t-learning application tests. All this is made possible by a combination of broadcast and broadband technologies. © 2011 World Scientific Publishing Company.

关键词： Students

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Managing political differences in social media 14

Managing political differences in social media

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17th ACM Conference on computer Supported Cooperative Work and Social Computing, CSCW 2014

作者： Grevet, Catherine Terveen, Loren Gilbert, Eric School of Interactive Computing and GVU Center Georgia Institute of Technology United States Department of Computer Science and Engineering University of Minnesota United States

ISBN: (纸本)9781450325400

Most people associate with people like themselves, a process called homophily. Exposure to diversity, however, makes us more informed as individuals and as a society. In this paper, we investigate political disagreements on Facebook to explore the conditions under which diverse opinions can coexist online. Via a mixed methods approach comprising 103 survey responses and 13 interviews with politically engaged American social media users, we found that participants who perceived more differences with their friends engaged less on Facebook than those who perceived more homogeneity. Weak ties were particularly brittle to political disagreements, despite being the ties most likely to offer diversity. Finally, based on our findings we suggest potential design opportunities to bridge across ideological difference: 1) support exposure to weak ties;and 2) make common ground visible while friends converse. Copyright © 2014 ACM.

关键词： Surveys

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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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Practicing what we preach: IEEE VR 2009 virtual program committee meeting

Practicing what we preach: IEEE VR 2009 virtual program comm...

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作者： Lindeman, Robert W. Reiners, Dirk Steed, Anthony Human Interaction in Virtual Environments Lab Department of Computer Science Worcester Polytechnic Institute Worcester MA United States Center for Advanced Computer Studies University of Louisiana Lafayette LA United States Virtual Environments and Computer Graphics Group Department of Computer Science University College London London United Kingdom

This article reports on the experience of conducting the program committee (PC) meeting for the IEEE VR 2009 conference in Second Life. More than 50 PC members from around the globe met virtually over a two-day period to decide which papers to accept for presentation at the conference. Survey responses from 42 of the PC members indicate generally positive feelings toward this meeting format, although several alterations will help improve interaction between attendees in future meetings. © 2009 IEEE.

关键词： Probability density function

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Collaborative and immersive medical education in a virtual workbench environment

Collaborative and immersive medical education in a virtual w...

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9th International Conference on Knowledge-Based Intelligent Information and Engineering Systems, KES 2005

作者： Choi, Yoo-Joo Choi, Soo-Mi Rhee, Seon-Min Kim, Myoung-Hee Department of Computer Science and Engineering Ewha Womans University Seoul Korea Republic of School of Computer Engineering Sejong University Seoul Korea Republic of Center for Computer Graphics and Virtual Reality Ewha Womans Univesity Seoul Korea Republic of

ISBN: (纸本)3540288961

In this paper we introduce a framework for an advanced medical education in a table-type VR environment, which is based on an efficient deformable modeling for the interactive manipulation of soft tissues and a realistic motion simulation for dynamic human organs. The proposed framework includes two data storages with 3D/4D models and the 2D anatomic information, and various functional modules that are used to effectively explain human organs by visualizing and synchronizing with the components in the data storages. In our VR environment, a table-type virtual workbench is effectively used for the collaborative and realistic presentation to a group of learners and the video-based tracking environment provides the convenience for a user to select and to manipulate a subject of learning. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Medical education

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Novel uses of Pinch Gloves™ for virtual environment interaction techniques

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Virtual Reality 2002年第3期6卷 122-129页

作者： Bowman, D.A. Wingrave, C.A. Campbell, J.M. Ly, V.Q. Rhoton, C.J. Department of Computer Science Virginia Tech. Blacksburg VA United States College of Computing Graphics Visualization and Usability Center Georgia Institute of Technology GA United States Department of Computer Science (0106) Virginia Tech. Blacksburg VA 24061 United States

The usability of three-dimensional (3D) interaction techniques depends upon both the interface software and the physical devices used. However, little research has addressed the issue of mapping 3D input devices to interaction techniques and applications. This is especially crucial in the field of Virtual Environments (VEs), where there exists a wide range of potential 3D input devices. In this paper, we discuss the use of Pinch Gloves™ - gloves that report contact between two or more fingers - as input devices for VE systems. We begin with an analysis of the advantages and disadvantages of the gloves as a 3D input device. Next, we present a broad overview of three novel interaction techniques we have developed using the gloves, including a menu system, a text input technique, and a two-handed navigation technique. All three of these techniques have been evaluated for both usability and task performance. Finally, we speculate on further uses for the gloves. © Springer-Verlag London Ltd.

关键词： 3D Input Devices Interaction Techniques Pinch Gloves Usability Evaluation Virtual Environments

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The effects of interaction techniques on talk patterns in collaborative peer learning around interactive tables 11

The effects of interaction techniques on talk patterns in co...

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Proceedings of the SIGCHI Conference on Human Factors in Computing Systems

作者： Jamil, Izdihar O'Hara, Kenton Perry, Mark Karnik, Abhijit Subramanian, Sriram Interaction and Graphics Group Department of Computer Science University of Bristol United Kingdom Microsoft Research Cambridge United Kingdom DISC Brunel University United Kingdom Mobile Life Interactive Institute Sweden

ISBN: (纸本)9781450302289

This paper presents the findings of a user study investigating conversational patterns across three conditions of table-based interaction (direct touch interactive table, pantograph interactive table and non-digital table) for different types of educational activities. Findings demonstrate that communication style is significantly affected by interaction techniques. The direct touch technique stimulated conversations based around the topic and pedagogical method. The pantograph technique promoted playfulness and had a higher number of directive utterances between participants, with fewer task-based, group-oriented utterances. The non-digital table promoted reflective forms of task-orientated utterance, encouraged group communication and fostered more equitable participation between members. The findings provide insights into the design of interactive tables to support particular forms of social interaction. Copyright 2011 ACM.

关键词： Pantographs

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