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Integrating visual and semantic contexts for topic network generation and word sense disambiguation 09

Integrating visual and semantic contexts for topic network g...

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ACM International Conference on Image and Video Retrieval, CIVR 2009

作者： Fan, Jianping Luo, Hangzai Shen, Yi Yang, Chunlei Dept. of Computer Science UNC-Charlotte Charlotte NC 28223 United States Software Engineering Institute East China Normal University Shanghai 200062 China

ISBN: (纸本)9781605584805

To support more effective searches in large-scale weakly-tagged image collections, we have developed a novel algorithm to integrate both the visual similarity contexts between the images and the semantic similarity contexts between their tags for topic network generation and word sense disambiguation. First, a topic network is generated to characterize both the semantic similarity contexts and the visual similarity contexts between the image topics more sufficiently. By organizing large numbers of image topics according to their cross-modal inter-topic similarity contexts, our topic network can make the semantics behind the tag space more explicit, so that users can gain deep insights rapidly and formulate their queries more precisely. Second, our word sense disambiguation algorithm can integrate the topic network to exploit both the visual similarity contexts between the images and the semantic similarity contexts between their tags for addressing the issues of polysemes and synonyms more effectively, thus it can significantly improve the precision and recall rates for image retrieval. Our experiments on large-scale Flickr and LabelMe image collections have provided very positive results. Copyright 2009 ACM.

关键词： Semantics

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Educational case studies with an open source embedded real-time Java processor

Educational case studies with an open source embedded real-t...

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2009 Workshop on Embedded systems Education, WESE 2009

作者： Pedersen, Rasmus Ulslev Schoeberl, Martin Embedded Software Laboratory Dept. of Informatics Copenhagen Business School Howitzvej 60 2000 Frederiksberg Denmark Institute of Computer Engineering Vienna University of Technology Austria

ISBN: (纸本)9781450300216

In this paper we show a platform which allows for education and training of a number of essential embedded skills. The Java optimized processor (JOP) is open source and has been used in several educational and training sessions and we cover how each setting has trained a special skill set. The experience covers basics from undergraduate education to Ph.D. level education. At each level different properties of the system are emphasized. Our emphasis on the interdisciplinary of embedded systems education is based on referenced research findings. This way we provide empirical findings and couple it with academic frameworks. © ACM 2009.

关键词： Embedded systems

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User evaluation of lightweight user authentication with a single tri-axis accelerometer 09

User evaluation of lightweight user authentication with a si...

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Living in a world as colorful as you - 11th International Conference on Human-computer Interaction with Mobile Devices and Services, MobileHCI 2009

作者： Liu, Jiayang Zhong, Lin Wickramasuriya, Jehan Vasudevan, Venu Dept. of Electrical and Computer Engineering Rice University Houston TX United States Software Platforms Research Motorola Inc. Schaumburg IL United States

ISBN: (纸本)9781605582818

We report a series of user studies that evaluate the feasibility and usability of light-weight user authentication with a single tri-axis accelerometer. We base our investigation on uWave, a state-ofthe- art recognition system for user-created free-space manipulation, or gestures. Our user studies address two types of user authentication: non-critical authentication (or identification) for a user to retrieve privacy-insensitive data;and critical authentication for protecting privacy-sensitive data. For non-critical authentication, our evaluation shows that uWave achieves high recognition accuracy (98%) and its usability is comparable with text IDbased authentication. Our results also highlight the importance of constraints for users to select their gestures. For critical authentication, the evaluation shows uWave achieves state-of-the-art resilience to attacks with 3% false positives and 3% false negatives, or 3% equal error rate. We also show that the equal error rate increases to 10% if the attackers see the users performing their gestures. This shows the limitation of gesture-based authentication and highlights the need for visual concealment.

关键词： Accelerometers

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A novel secure data hiding scheme using a secret reference matrix

A novel secure data hiding scheme using a secret reference m...

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IIH-MSP 2009 - 2009 5th International Conference on Intelligent Information Hiding and Multimedia Signal Processing

作者： Lin, Chi-Nan Chang, Chin-Chen Lee, Wei-Bin Lin, Jason Dept. of Computer Science and Information Engineering National Chung Cheng Univ. Chiayi 62102 Taiwan Dept. of Management Information Systems Central Taiwan Univ. of Sci. and Tech. Taichung 40601 Taiwan Dept. of Information Engineering and Computer Science Feng Chia Univ. Taichung 40724 Taiwan

ISBN: (纸本)9780769537627

Steganography is a study to hide secret message in multimedia cover which will be transmitted through the Internet. The cover carriers can be image, video, sound or text data. In this paper, a novel scheme is proposed to hide data in 8-bits gray-scale cover image based on a 256x256 secret reference matrix (SRM) which was constructed by using a 3x3 table with unrepeated digits from 0-8. Experimental results showed, under the same hiding capacity, the proposed method has better stego-image quality (measured with peak-signal-to-noise-ratio, PSNR) compared with some other research methods using similar approach. The proposed method has high hiding capacity, better stego-image quality, requires little calculation and is easy to implement. © 2009 IEEE.

关键词： Steganography

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Adding aggressive error correction to a high-performance compressing flash file system

Adding aggressive error correction to a high-performance com...

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Embedded systems Week 2009, ESWEEK 2009 - 7th ACM International Conference on Embedded software, EMSOFT '09

作者： Kang, Yangwook Miller, Ethan L. Dept. of Computer Engineering Hongik University Korea Republic of Storage Systems Research Center University of California Santa Cruz CA United States

ISBN: (纸本)9781605586274

While NAND flash memories have rapidly increased in both capacity and performance and are increasingly used as a storage device in many embedded systems, their reliability has decreased both because of increased density and the use of multi-level cells (MLC). Current MLC technology only specifies the minimum requirement for an error correcting code (ECC), but provides no additional protection in hardware. However, existing flash file systems such as YAFFS and JFFS2 rely upon ECC to survive small numbers of bit errors, but cannot survive the larger numbers of bit errors or page failures that are becoming increasingly common as flash file systems scale to multiple gigabytes. We have developed a flash memory file system, RCFFS, that increases reliability by utilizing algebraic signatures to validate data and Reed-Solomon codes to correct erroneous or missing data. Our file system allows users to adjust the level of reliability they require by specifying the number of redundancy pages for each erase block,allowing them to dynamically trade off reliability and storage overhead. By integrating error mitigation with advanced features such as fast mounting and compression, we show, via simulation in NANDsim, that our file system can outperform YAFFS and JFFS2 while surviving flash memory errors that would cause data loss for existing flash file systems. Copyright 2009 ACM.

关键词： Economic and social effects

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Designing a trading card game as educational reward system to improve students' learning motivations

Designing a trading card game as educational reward system t...

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作者： Chen, Peayton Kuo, Rita Chang, Maiga Heh, Jia-Sheng Dept. of Information and Computer Engineering Chung-Yuan Christian Univ. Taiwan Dept. of Digital Design Mingdao Univ. Taiwan School of Computing and Information Systems Athabasca University Canada

ISBN: (纸本)3642112447

Reward is the simplest way to motivate students in education. It can encourage students to learn and get immediate achievement. Moreover, it is also has potential to construct students' intrinsic motivation. However, traditional rewards are often less valuable thus can't keep motivating students, e.g. symbolic rewards like stars or stickers can't be used by the students after the class;therefore, the values of symbolic rewards are not appreciated by the students. This research designs cards of a self-developed computerized trading card game (TCG) as educational rewards in order to inspire students learning, e.g. higher learning performance a student shows up, higher level cards the student would receive from the teacher. And of course, the student would have higher chances to beat other players in the TCG. Through the TCG, the rewards can hold students' interest for longer. © 2009 Springer-Verlag.

关键词： Students

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An integrated multi-source JDL high-level fusion architecture using recombinant cognition synthesis

An integrated multi-source JDL high-level fusion architectur...

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Multisensor, Multisource Information Fusion: Architectures, Algorithms, and Applications 2009

作者： Solanoa, Marco A. Ekwaro-Osire, Stephen Tanik, Murat M. Raytheon Intelligence and Information Systems Dallas TX United States Dept. of Mechanical Engineering Texas Tech University Lubbock TX United States Dept. of Electrical and Computer Engineering University of Alabama Birmingham AL United States

ISBN: (纸本)9780819476111

High-Level fusion systems based on the JDL model are relatively immature. Current solutions lack a comprehensive ability to manage multi-source data in a multi-dimensional vector space, and generally do not integrate collection to action models in a cohesive thread. Recombinant Cognition Synthesis (RCS) leverages best-of-breed techniques with a geospatial, temporal and semantic data model to provide a unified methodology that recombines multi-source data with analytic and predictive algorithms to synthesize actionable intelligence. This architecture framework enables the traversal of entity relationships at different level of granularities and the discovery of latent knowledge, thereby facilitating the domain problem analysis and the development of a Course-of-Action to mitigate adversarial threats. RCS also includes process refinement techniques to achieve superior information dominance, by incorporating specialized metadata. This comprehensive and unified methodology delivers enhanced utility to the intelligence analyst, and addresses key issues of relevancy, timeliness, accuracy, and uncertainty by providing metrics via feedback loops within the RCS infrastructure that augment the efficiency and effectiveness of the end-to-end fusion processing chain. © 2009 SPIE.

关键词： Data mining

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Quality-aware collaborative Question Answering: Methods and evaluation 09

Quality-aware collaborative Question Answering: Methods and ...

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2nd ACM International Conference on Web Search and Data Mining, WSDM'09

作者： Suryanto, Maggy Anastasia Lim, Ee-Peng Sun, Aixin Chiang, Roger H.L. School of Computer Engineering Nanyang Technological University Singapore School of Information Systems Singapore Management University Singapore Information Systems Dept. College of Business University of Cincinnati United States

ISBN: (纸本)9781605583907

Community Question Answering (QA) portals contain questions and answers contributed by hundreds of millions of users. These databases of questions and answers are of great value if they can be used directly to answer questions from any user. In this research, we address this collaborative QA task by drawing knowledge from the crowds in community QA portals such as Yahoo! Answers. Despite their popularity, it is well known that answers in community QA portals have unequal quality. We therefore propose a quality-aware framework to design methods that select answers from a community QA portal considering answer quality in addition to answer relevance. Besides using answer features for determining answer quality, we introduce several other quality-aware QA methods using answer quality derived from the expertise of answerers. Such expertise can be question independent or question dependent. We evaluate our proposed methods using a database of 95K questions and 537K answers obtained from Yahoo! Answers. Our experiments have shown that answer quality can improve QA performance significantly. Furthermore, question dependent expertise based methods are shown to outperform methods using answer features only. It is also found that there are also good answers not among the best answers identified by Yahoo! Answers users. Copyright 2009 ACM.

关键词： Quality control

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Evolution and integration of medical laboratory information system in an Asia national medical center

Evolution and integration of medical laboratory information ...

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作者： Cheng, Po-Hsun Chen, Sao-Jie Lai, Jin-Shin Dept. of Software Engineering National Kaohsiung Normal University Kaohsiung Taiwan Dept. of Helathcare Information and Management Ming Chuan University and Information Systems Office National Taiwan University Hospital Taipei Taiwan Graduate Institute of Electronics Engineering Dept. of Electrical Engineering National Taiwan University Taipei Taiwan Dept. of Physical Medicine and Rehabilitation National Taiwan University Hospital Taipei Taiwan

This work elucidates the evolution of three generations of the laboratory information system in the National Taiwan University Hospital, which were respectively implemented in an IBM Series/1 minicomputer, a client/server and a plug-and-play HL7 interface engine environment respectively. The experience of using the HL7 healthcare information exchange in the hospital information system, laboratory information system, and automatic medical instruments over the past two decades are illustrated and discussed. The latest design challenge in developing intelligent laboratory information services is to organize effectively distributed and heterogeneous medical instruments through the message gateways. Such experiences had spread to some governmental information systems for different purposes in Taiwan;besides, the healthcare information exchange standard, software reuse mechanism, and application service provider adopted in developing the plug-and-play laboratory information system are also illustrated. Copyright © 2009 The Institute of Electronics, Information and Communication Engineers.

关键词： computer software reusability

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Parameter optimization for image denoising based on block matching and 3D collaborative filtering

Parameter optimization for image denoising based on block ma...

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Medical Imaging 2009 - Image Processing

作者： Pedada, Ramu Kugu, Emin Li, Jiang Yue, Zhanfeng Shen, Yuzhong Dept. of Electrical and Computer Engineering Old Dominion University Norfolk VA United States Precision Imaging Systems Cary NC 27519 United States

ISBN: (纸本)9780819475107

Clinical MRI images are generally corrupted by random noise during acquisition with blurred subtle structure features. Many denoising methods have been proposed to remove noise from corrupted images at the expense of distorted structure features. Therefore, there is always compromise between removing noise and preserving structure information for denoising methods. For a specific denoising method, it is crucial to tune it so that the best tradeoff can be obtained. In this paper, we define several cost functions to assess the quality of noise removal and that of structure information preserved in the denoised image. Strength Pareto Evolutionary Algorithm 2 (SPEA2) is utilized to simultaneously optimize the cost functions by modifying parameters associated with the denoising methods. The effectiveness of the algorithm is demonstrated by applying the proposed optimization procedure to enhance the image denoising results using block matching and 3D collaborative filtering. Experimental results show that the proposed optimization algorithm can significantly improve the performance of image denoising methods in terms of noise removal and structure information preservation. © 2009 Copyright SPIE - The International Society for Optical engineering.

关键词： Cost functions

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