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Comparing interlaced and progressive scans for MPEG coding of medical video

Comparing interlaced and progressive scans for MPEG coding o...

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Proceedings of the 2005 IEEE 31st Annual Northeast Bioengineering Conference

作者： Hu, Chengquan Sclabassi, Robert J. Scheuer, Mark L. Yang, Jie Xu, Jian Liu, Qiang Sun, Mingui College of Computer Science and Technology Juin University Changchun 130012 China Department of Electrical Engineering United States Department of Neurological Surgery United States Department of Biomedical Engineering United States Department of Neurology University of Pittsburgh Pittsburgh PA 15261 United States Human-Computer Interaction Institute Carnegie Mellon University Pittsburgh PA 15213 United States

This paper examines MPEG-4 coding efficiency for interlaced and progressively scanned video data recorded during remote patient monitoring. Experiments are performed using both interlaced and progressive coding methods to compress interlaced, deinterlaced and progressively scanned video sequences at different bit rates. Our results show that progressively scanned video outperforms interlaced video in both coding efficiency and video quality. We also found that the use of a deinterlacing algorithm improves video coding performance. In addition, we found that interlaced or progressively scanned video data can be compressed using either progressive or interlaced coding algorithms without significant difference in performance. © 2005 IEEE.

关键词： Encoding (symbols)

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Robust and accurate cancer classification with gene expression profiling

Robust and accurate cancer classification with gene expressi...

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Proceedings of the IEEE Computational Systems Bioinformatics Conference, CSB

作者： Haifeng Li Keshu Zhang Tao Jiang Department of Computer Science University of California Riverside CA USA Human Interaction Research Laboratory Motorola Inc. Tempe AZ USA

ISBN: (纸本)0769523447

Robust and accurate cancer classification is critical in cancer treatment. Gene expression profiling is expected to enable us to diagnose tumors precisely and systematically. However, the classification task in this context is very challenging because of the curse of dimensionality and the small sample size problem. In this paper, we propose a novel method to solve these two problems. Our method is able to map gene expression data into a very low dimensional space and thus meets the recommended samples to features per class ratio. As a result, it can be used to classify new samples robustly with low and trustable (estimated) error rates. The method is based on linear discriminant analysis (LDA). However, the conventional LDA requires that the within-class scatter matrix S/sub w/ be nonsingular. Unfortunately, S/sub w/ is always singular in the case of cancer classification due to the small sample size problem. To overcome this problem, we develop a generalized linear discriminant analysis (GLDA) that is a general, direct, and complete solution to optimize Fisher's criterion. GLDA is mathematically well-founded and coincides with the conventional LDA when S/sub w/ is nonsingular. Different from the conventional LDA, GLDA does not assume the nonsingularity of S/sub w/, and thus naturally solves the small sample size problem. To accommodate the high dimensionality of scatter matrices, a fast algorithm of GLDA is also developed. Our extensive experiments on seven public cancer datasets show that the method performs well. Especially on some difficult instances that have very small samples to genes per class ratios, our method achieves much higher accuracies than widely used classification methods such as support vector machines, random forests, etc.

关键词： Robustness Cancer Gene expression Linear discriminant analysis Neoplasms computer science humans Scattering Support vector machines Support vector machine classification

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Choosing friends carefully: Allies for critical computing 05

Choosing friends carefully: Allies for critical computing

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4th Decennial Aarhus Conference on Critical Computing - Between Sense and Sensibility

作者： Dearden, Andy Walker, Steve Watts, Leon Communication and Computing Research Centre Sheffield Hallam University Sheffield S1 1WB United Kingdom School of Information Management Leeds Metropolitan University Headingley Leeds LS6 3QS United Kingdom Human-Computer Interaction Group Department of Computer Science University of Bath Bath BA2 7AY United Kingdom

ISBN: (纸本)1595932038

In this paper, we argue firstly that researchers in critical computing should address the specific information and communication technology (ICT) needs and activities of those agencies concerned with emancipatory issues. Secondly, we argue that a critical perspective, explicitly foregrounding empowerment and emancipatory concerns, forms a basis for emphasising the practice of individuals, groups and organisations, rather than purely focusing on organisational form in social *** discuss this context of social action, identifying some relevant ICT-related challenges. We identify three themes that highlight factors that differentiate ICT support for social action groups from the setting of conventional business and service organisations: Free / Libre Open-Source Software, techniques and technologies for engagement through storytelling, and learning and evaluation in social action. © 2005 ACM.

关键词： Open systems

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Participating in civil society: The case of networked communities

Participating in civil society: The case of networked commun...

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作者： Kavanaugh, Andrea Carroll, John M. Rosson, Mary Beth Reese, Debbie D. Zin, Than T. Department of Computer Science Virginia Tech 660 McBryde Hall Blacksburg V. United States Ctr. for Human-Computer Interaction Sch. of Info. Sci. and Technology Pennsylvania State Univ. Univ. P. United States Center for Educational Technologies Wheeling Jesuit University 316 Washington Ave. Wheeling W. United States

A community computer network facilitates civic participation by providing pervasive local resources online and by connecting people to local communication and discussion channels, public and non-profit organization leaders and members, and many other civic resources. We present findings from longitudinal data (two rounds between 2001 and 2002) of a stratified random survey of 100 households in a mature community network, the Blacksburg Electronic Village (BEV). We offer exploratory and confirmatory analyses, including a 'civic effects' model, that show demographic characteristics (education, age) and psychological factors (extroversion) explain staying informed, collective efficacy, group membership, activism, and using the Internet for civic and political purposes. The model further explains differences in respondents' involvement in local issues once they go online. Informed activists with multiple group memberships become more involved in local issues once going online, whereas informed non-activists become less involved once online. Our study suggests that in order to play a constructive role in creating a more civil society, community networks should explicitly pursue strategies that encourage community activism. One way to do this, given the strong role of association membership in activism, is for ISPs to offer bundled standard Internet applications at low cost to non-profit community groups (e.g. email for leadership, online discussion for members, web space). Community networks should also promote and support the use by local groups of innovative tools for non-experts, such as easy collaborative web-based tools for information production and collaboration. © 2004 Elsevier B.V. All rights reserved.

关键词： Social aspects

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MOCHA: modular and configurable handset software architecture

MOCHA: modular and configurable handset software architectur...

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Consumer Communications and Networking Conference, CCNC IEEE

作者： K. Kim J.D. Kwak Seung Hwan Jo Department of Computer Science Virginia Tech Human Computer Interaction Group Blacksburg VA USA UMTS Research & Development Mobile Communication Division Telecommunication Network Samsung Electronics Company Limited South Korea

This paper describes Mocha, an open mobile S/W platform and application developed by Samsung Electronics. Mocha's key features are its efficiency (it fits in regular phones), its portability (it covers different stack/OS/chipsets for CDMA, EV-DO, GSM/GPRS, and UMTS), its modularity and configurability (it meets customers' varying needs), its extensibility (it can he adapted to include new features and interfaces), its interoperability based on de-facto standards such as OMA, 3GPP, 3GPP2, CDG; and its security (it can withstand the attack of malicious applications). Among these key features, in this paper, we outline the multimedia messaging service (MMS) that inspired this system and then describe its design, architecture, and prototype implementation.

关键词： Telephone sets Software architecture Application software Multiaccess communication GSM Ground penetrating radar 3G mobile communication Security Multimedia systems Message service

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Making an impact in your community: HCI and us public policy

Making an impact in your community: HCI and us public policy

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Conference on human Factors in Computing Systems, CHI EA 2005

作者： Lazar, Jonathan Bederson, Ben Hochheiser, Harry Johnson, Jeff Karat, Clare-Marie Dept. of Computer and Information Sciences Universal Usability Laboratory Towson University 8000 York Road Towson MD 21252 United States Human-Computer Interaction Lab Dept. of Computer Science University of Maryland College Park MD 20742 United States National Institute on Aging 333 Cassell Drive Baltimore MD 21224 United States UI Wizards Inc. 231 Moscow St. San Francisco CA 94112 United States IBM TJ Watson Research Center 19 Skyline Drive [2N-D24 Hawthorne NY 10532 United States

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Comparing interlaced and progressive scans for MPEG coding of medical video

Comparing interlaced and progressive scans for MPEG coding o...

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Annual Northeast Bioengineering Conference

作者： Chengquan Hu R.J. Sclabassi M.L. Scheuer J. Yang J. Xu Q. Liu M. Sun College of Computer Science and Technology Jilin University Changchun China Department of Electrical Engineering University of Pittsburgh Pittsburgh PA USA Department of Electrical Engineering Department of Neurological Surgery Department of Biomedical Engineering University of Pittsburgh Pittsburgh PA USA Department of Neurology University of Pittsburgh Pittsburgh PA USA Human-Computer Interaction Institute Carnegie Mellon University Pittsburgh PA USA

关键词： Video compression Video equipment PSNR MPEG 4 Standard Video coding Layout Biomedical engineering Data engineering Patient monitoring Codecs

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Dynamically deployed support as a potential solution to negative behavioral adaptation

Dynamically deployed support as a potential solution to nega...

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IEEE Symposium on Intelligent Vehicle

作者： R. Kovordanyi K. Ohlsson T. Alm Cognitive technology at the Department of Computer and Information Science Linköping Universitet Sweden Human-machine interaction at the division of Industrial Ergonomics Department of Mechanical Engineering Linköping Universitet Sweden Division of Industriai Ergonomics Department of Mechanical Engineering Linköping Universitet Linkoping Sweden

Advanced driver assistance systems are designed to make driving easier that is, to alleviate the driver's workload, and to increase traffic safety. However, traffic safety is affected by negative behavioral adaptation, meaning that drivers tend to increase speed and pay less attention to driving when supported by an advanced assistance system. We relate behavioral adaptation to reinforcement learning at a subconscious level, and propose that driver assistance is dynamically varied within predetermined safety limits. The aim of employing a dynamic assistance policy is to prevent the driver from noticing a constant improvement in vehicle handling. We conclude by describing ongoing work for empirically evaluating an improved lane departure warning system that uses a dynamic assistance policy.

关键词： Safety Vehicle dynamics Alarm systems Wheels US department of Transportation Learning Vehicle driving Sensor systems Ergonomics Torque

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Graduate education in human-computer interaction

Graduate education in human-computer interaction

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Conference on human Factors in Computing Systems, CHI EA 2005

作者： Foley, James Beaudouin-Lafon, Michel Grudin, Jonathan Hollan, James Hudson, Scott Olson, Judy Verplank, Bill Laboratoire de Recherche en Informatique Bât 490 Université Paris Sud 91405 Orsay Cedex France GVU Center and College of Computing Georgia Institute of Technology Atlanta GA 30332-0280 United States Microsoft Research Bellevue WA United States Department of Cognitive Science University of California San Diego CA 92093-0515 United States Human-Computer Interaction Institute Carnegie Mellon University Pittsburgh PA 15213-3891 United States School of Information Univ. of Michigan Ann Arbor MI 48109-1092 United States Visiting Scholar Stanford University Department of Computer Science Stanford CA 94305-9035 United States

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Turning information visualization innovations into commercial products: lessons to guide the next success

Turning information visualization innovations into commercia...

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IEEE Symposium on Information Visualization (INFOVIS)

作者： B. Shneiderman R. Rao K. Andrews C. Ahlberg D. Brodbeck T. Jewitt J. Mackinlay Department of Computer Science & Human-Computer Interaction Laboratory Institute for Advanced Computer Studies College Park MD USA Inxight Software Inc. Sunnyvale CA USA Graz University of Technology IICM Graz Austria Spotfire Inc. Somerville MA USA Macrofocus GmbH Zurich Switzerland The Hive Group San Mateo CA USA User Interface Tableau Software Seattle WA USA

As information visualization matures as an academic research field, commercial spinoffs are proliferating, but success stories are harder to find. This is the normal process of emergence for new technologies, but the panel organizers believe that there are certain strategies that facilitate success. To teach these lessons, we have invited several key figures who are seeking to commercialize information visualization tools. The panelists make short presentations, engage in a moderated discussion, and respond to audience questions.

关键词： Turning Technological innovation Data visualization User interfaces Books Management training computer science laboratories computer interfaces Educational institutions

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