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Seventeenth ACM Conference on Hypertext and Hypermedia, HT'06

作者： Hansen, Frank Allan Center for Interactive Spaces Department of Computer Science University of Aarhus Abogade 34 DK-8200 Arhus N Denmark

ISBN: (纸本)1595934170

Ubiquitous annotation systems allow users to annotate physical places, objects, and persons with digital information. Especially in the field of location based information systems much work has been done to implement adaptive and context-aware systems, but few efforts have focused on the general requirements for linking information to objects in both physical and digital space. This paper surveys annotation techniques from open hypermedia systems, Web based annotation systems, and mobile and augmented reality systems to illustrate different approaches to four central challenges ubiquitous annotation systems have to deal with: anchoring, structuring, presentation, and authoring. Through a number of examples each challenge is discussed and HyCon, a context-aware hypermedia framework developed at the University of Aarhus, Denmark, is used to illustrate an integrated approach to ubiquitous annotations. Finally, a taxonomy of annotation systems is presented. The taxonomy can be used both to categorize system based on the way they present annotations and to choose the right technology for interfacing with annotations when implementing new systems. Copyright 2006 ACM.

关键词： Ubiquitous computing

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Squeeze: Designing for playful experiences among co-located people in homes

Squeeze: Designing for playful experiences among co-located ...

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

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

ISBN: (纸本)1595936424

Squeeze is a multi-person, flexible and interactive furniture that allows for collective and playful exploration of the family history among co-located people in homes. It is designed to explore how we can use digital technology to create settings where co-located family members can collectively and actively engage in playful activities as part of their everyday lives at home. It is argued that this is for the most part an unexplored design space, which is awaiting the interest of the CHI community. Our work has both a strategic and theoretical outset. It is designed from a strategic point to open up the design space for digital domestic technology emphasizing the potential in designing for playful experiences among co-located family members. Secondly, it is designed from a theoretical perspective, namely that of designing for playfulness and aesthetics of interaction.

关键词： computer aided design

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self-CD: interactive self-collision detection for deformable body simulation using GPUs

self-CD: Interactive self-collision detection for deformable...

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Third Asian Simulation Conference, Asiasim 2004

作者： Choi, Yoo-Joo Kim, Young J. Kim, Myoung-Hee Department of Computer Science and Engineering Ewha Womans University Seoul Korea Republic of Center for Computer Graphics and Virtual Reality Ewha Womans Univesity Seoul Korea Republic of

This paper presents an efficient self-collision detection algorithm for deformable body simulation using programmable graphics processing units (GPUs). The proposed approach stores a triangular mesh representation of a deformable model as ID textures and rapidly detects self-collisions between all pairs of triangular primitives using the programmable SIMD capability of GPUs [1]. Since pre-computed spatial structure such as bounding volume hierarchy is not used in our algorithm, our algorithm does not require expensive runtime updates to such complex structure as the underlying model deforms. Moreover, in order to overcome a potential bottleneck between CPU and GPU, we propose a hierarchical encoding/decoding scheme using multiple off-screen buffers and multi-pass rendering techniques, which reads only a region of interests in the resulting off-screen buffer. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Algorithms

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Diverse trajectory planning for UAV control displays

Diverse trajectory planning for UAV control displays

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12th International Conference on Autonomous Agents and Multiagent Systems 2013, AAMAS 2013

作者： Tožička, Jan Balata, Jan Míkovec, Zdeněk Agent Technology Center Dept. of Computer Science Prague Czech Republic Department of Computer Graphics and Interaction FEE Czech Technical University Prague Czech Republic

ISBN: (纸本)9781627487665

Current UAV control systems can plan optimal trajectories with respect to predefined constraints (waypoints, no-fly zones). However when the operator is not satisfied with planned trajectories it is usually very complicated to force the system to change the trajectories in desired way. In this demonstration we solve this problem by innovative UAV control display based on diverse planning algorithm. Copyright © 2013, International Foundation for Autonomous Agents and Multiagent Systems (***). All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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Ubiquitous hypermedia and social interaction in physical environments 06

Ubiquitous hypermedia and social interaction in physical env...

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Seventeenth ACM Conference on Hypertext and Hypermedia, HT'06

作者： Grønbæk, Kaj Center for Interactive Spaces Department of Computer Science University of Aarhus Aabogade 34 DK8200 Aarhus N Denmark

ISBN: (纸本)1595934170

Hypermedia and the Web have been successful means to create global social networks via the Internet. Collaborative hypermedia systems and standards like BSCW, Wikis, and WebDAV enable people to establish formal and informal collaboration patterns across the Internet. The easy to use Blog/Weblog systems have made it possible for people to establish communities, express opinions, and spark debates over the Internet with minimal effort. Open hypermedia and annotation systems have been developed to support linking and commenting on existing Web documents to support scholarly discourse of online material. Many e-learning applications have been built on top of these systems to provide support for remote learning activities in schools and at workplaces. However, this focus on remote and distributed social networks has to some degree taken the focus away from social networks and collaboration among people who share the same physical environment whether face-to-face or over time. Physical environments in this context may be public spaces or buildings such as workplaces, schools, libraries, museums, and homes. Some of the technologies listed above may of course be applied by people who are in close proximity to each other who shares the same space over time, but I will argue that there is a need to focus on and conduct research in new ubiquitous hypermedia infrastructures and interaction techniques to also support social interaction and networking among people who share the same physical environment. In the center for interactive Spaces and predecessor projects, we have focused on the development of various kinds of ubiquitous hypermedia infrastructures and applications that support collaboration or social interaction among proximate peers at work, at school, at libraries, at museums, etc. We are applying various augmented reality tagging mechanisms (e.g., geo-tags, RFID, Bluetags, and visual tags) to provide hypermedia links among digital resources, people, objects and place

关键词： Ubiquitous computing

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Social web applications in the city: A lightweight infrastructure for urban computing 08

Social web applications in the city: A lightweight infrastru...

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HYPERTEXT'08: 19th ACM Conference on Hypertext and Hypermedia 2008, HT'08

作者： Hansen, Frank Allan Grønbæk, Kaj Center for Interactive Spaces Department of Computer Science University of Aarhus Åbogade 34 DK8200 Århus N Denmark

ISBN: (纸本)9781595939852

In this paper, we describe an infrastructure for browsing and multimedia blogging of Web-based information anchored with physical places in an urban environment. The infrastructure is generic in the sense that it may use any means such as GPS, RFID or 2D-barcodes as ubiquitous links anchors to anchor Web-based information, blogs, and services in the physical environment. The infrastructure is inspired from earlier work on open hypermedia, in the sense that the anchoring and blogging functionality can be integrated to augment arbitrary Web sites providing information that is relevant to places or objects in the physical world. The blog and anchor functionality is implemented as a set of Web services running on a server external to the content server. Experiences and design issues from three cases are discussed, which use Semacode-based physical anchoring to support lightweight urban Web applications. Copyright 2008 ACM.

关键词： Blogs

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Rethinking the architecture design of data center networks

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Frontiers of computer science 2012年第5期6卷 596-603页

作者： Kaishun WU Jiang XIAO Lionel M. NI National Engineering Research Center of Digital Life State-Province Joint Laboratory of Digital Home Interactive Applications School of Physics and Engineering Sun Yat-sen University Guangzhou 510006 China Department of Computer Science and Engineering Hong Kong University of Science and Technology Hong Kong China

In the rising tide of the Internet of things, more and more things in the world are connected to the Internet. Recently, data have kept growing at a rate more than four times of that expected in Moore＇s law. This explosion of data comes from various sources such as mobile phones, video cameras and sensor networks, which often present multidi- mensional characteristics. The huge amount of data brings many challenges on the management, transportation, and pro- cessing IT infrastructures. To address these challenges, the state-of-art large scale data center networks have begun to provide cloud services that are increasingly prevalent. How- ever, how to build a good data center remains an open chal- lenge. Concurrently, the architecture design, which signifi- cantly affects the total performance, is of great research inter- est. This paper surveys advances in data center network de- sign. In this paper we first introduce the upcoming trends in the data center industry. Then we review some popular design principles for today＇s data center network architectures. In the third part, we present some up-to-date data center frame- works and make a comprehensive comparison of them. Dur- ing the comparison, we observe that there is no so-called op- timal data center and the design should be different referring to the data placement, replication, processing, and query pro- cessing. After that, several existing challenges and limitations are discussed. According to these observations, we point out some possible future research directions.

关键词： data center networks switch-based networks,direct networks hybrid networks

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Information-theoretic analysis of molecular (co)evolution using graphics processing units

Information-theoretic analysis of molecular (co)evolution us...

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3rd International Emerging Computational Methods for the Life sciences Workshop, ECMLS 2012

作者： Waechter, Michael Jaeger, Kathrin Weissgraeber, Stephanie Widmer, Sven Goesele, Michael Hamacher, Kay Interactive Graphics Systems Group Dept. of Computer Science TU Darmstadt Darmstadt Germany Bioinformatics Group Department of Biology TU Darmstadt Darmstadt Germany Bioinformatics Group Depts. of Biology Physics and Computer Science TU Darmstadt Darmstadt Germany

ISBN: (纸本)9781450313391

We present a massively-parallel implementation of the computation of (co)evolutionary signals from biomolecular sequence alignments based on mutual information (MI) and a normalization procedure to neutral evolution. The MI is computed for two- and three-point correlations within any multiple-sequence alignment. The high computational demand in the normalization procedure is efficiently met by an implementation on graphics Processing Units (GPUs) using NVIDIA's CUDA framework. GPU computation serves as an enabling technology here insofar as MI normalization is also possible using traditional computational methods but only GPU computation makes MI normalization for sequence analysis feasible in a statistically sufficient sample and in acceptable time. In particular, the normalization of the MI for three-point 'cliques' of amino acids or nucleotides requires large sampling numbers in the normalization, that can only be achieved using GPUs. We illustrate a) the computational efficiency and b) the biological usefulness of two- and three-point MI by an application to the well-known protein calmodulin. Here, we find striking coevolutionary patterns and distinct information on the molecular evolution of this molecule. © 2012 ACM.

关键词： graphics processing unit

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Visualization tools for industrial design problems applied to electron optics

Visualization tools for industrial design problems applied t...

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Three-Dimensional Visualization and Display Technologies 1989

作者： Alexander, J. Bechis, D. Winarsky, N. Alonso, R. Laur, D. Applied Mathematics and Scientific Computing David Sarnoff Research Center PrincetonNJ08540 United States Department of Computer Science Princeton University PrincetonNJ08544 United States Interactive Computer Graphics Laboratory Princeton University PrincetonNJ08544 United States

At the David Sarnoff Research center there exists a long standing research effort in support of the design of electron optic devices. The design process for such devices - the color high definition picture tube being the most recent and most outstanding example - involves the generation of very large volumes of data, from both simulation and experimentation. The goal of the design process is to simultaneously optimize performance parameters such as resolution, brightness, contrast and color purity, subject to manufacturing constraints, while varying the geometry or operating conditions of the electron gun or magnetic deflection system. To make effective use of this multi-dimensional information requires visualization tools to aid designers in exploring the design space. In this paper, we describe in detail the nature of the interactive graphics tools we have developed. After a brief overview of the optical design process, we sketch the details of the engineering database, which contains the simulation and experimentation results. We then present "general use" visualization tools which can be applied to many engineering fields to manipulate arrays of data. We also describe paradigms for using these tools to perform constrained optimization. Finally, we present a prototype visual searcher for the design-space, i.e., a tool that allows designers to visually search through the design database and ask "what-if" type questions. © 1989 SPIE. All rights reserved.

关键词： Electron guns

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Analysis of the Technology of Transfering a Three-Dimensional Model from Cad Format to the Control Code for 3D Printing

Analysis of the Technology of Transfering a Three-Dimensiona...

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2020 International Multi-Conference on Industrial Engineering and Modern Technologies, FarEastCon 2020

作者： Kholodilov, A.A. Faleeva, E.V. Kholodilova, M.V. Far Eastern State Transport University Department of Computer Science and Computer Graphics Khabarovsk Russia Computing Center of the Far Eastern Branch Russian Academy of Sciences Khabarovsk Russia

ISBN: (纸本)9781728169514

The paper analyzes the technology for translating a three-dimensional model from a CAD format into a control g-code for subsequent three-dimensional printing. The main stages of the process are considered, the principles of mathematical modeling at the stages are highlighted, recommendations for possible improvement of the software part of the 3D printing technology are indicated. © 2020 IEEE.

关键词： 3D printers

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