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检索条件"机构=Data Science and Computing Group"

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Categorization of computing education resources with utilization of crowdsourcing 12

Categorization of computing education resources with utiliza...

引用

12th ACM/IEEE-CS Joint Conference on Digital Libraries, JCDL '12

作者： Chen, Yinlin Bogen II, Paul Logasa Hsieh, Haowei Fox, Edward A. Cassel, Lillian N. Department of Computer Science Virginia Tech. Blacksburg VA United States Intelligent Computing Research Team Computational Data Analytics Group Oak Ridge National Laboratory Oak Ridge TN 37931 United States School of Library and Information Science University of Iowa Iowa City IA 52242 United States Department of Computing Sciences Villanova University Villanova PA 19085 United States

ISBN: (纸本)9781450311540

The Ensemble Portal harvests resources from multiple heterogeneous federated collections. Managing these dynamically increasing collections requires an automatic mechanism to categorize records in to corresponding topics. We propose an approach to use existing ACM DL metadata to build classifiers for harvested resources in the Ensemble project. We also present our experience with utilizing the Amazon Mechanical Turk platform to build ground truth training data sets from Ensemble collections. © 2012 ACM.

关键词： Digital libraries

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A quantitative evaluation of techniques for detection of abnormal change events in blogs. 12

A quantitative evaluation of techniques for detection of abn...

引用

12th ACM/IEEE-CS Joint Conference on Digital Libraries, JCDL '12

作者： Bogen II, Paul L. Furuta, Richard Shipman, Frank Intelligent Computing Research Team Computational Data Analytics Group Oak Ridge National Laboratory Oak Ridge TN United States Center for the Study of Digital Libraries Dept. of Computer Science and Engineering Texas A and M University College Station TX 77843 United States

ISBN: (纸本)9781450311540

While most digital collections have limited forms of change - primarily creation and deletion of additional resources - there exists a class of digital collections that undergoes additional kinds of change. These collections are made up of resources that are distributed across the Internet and brought together into a collection via hyperlinking. Resources in these collections can be expected to change as time goes on. Part of the difficulty in maintaining these collections is determining if a changed page is still a valid member of the collection. Others have tried to address this problem by measuring change and defining a maximum allowed threshold of change, however, these methods treat all change as a potential problem and treat web content as a static document despite its intrinsically dynamic nature. Instead, we approach the significance of change on the web as a normal part of a web document's life-cycle and determine the difference between what a maintainer expects a page to do and what it actually does. In this work we evaluate the different options for extractors and analyzers in order to determine the best options from a suite of techniques. The evaluation used a human-generated ground-truth set of blog changes. The results of this work showed a statistically significant improvement over a range of traditional threshold techniques when applied to our collection of tagged blog changes. © 2012 ACM.

关键词： Pattern recognition

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Collaborative authoring of Walden's paths

Collaborative authoring of Walden's paths

引用

2nd International Conference on Theory and Practice of Digital Libraries, TPDL 2012

作者： Li, Yuanling Bogen II, Paul Logasa Pogue, Daniel Furuta, Richard Shipman, Frank Center for the Study of Digital Libraries Department of Computer Science and Engineering Texas A and M University College Station TX United States Intelligent Computing Research Team Computational Data Analytics Group Oak Ridge National Laboratory Oak Ridge United States User Experience and Interaction Design Team Production Enhancement Halliburton Energy Services Houston TX United States

ISBN: (纸本)9783642332890

This paper presents a prototype of an authoring tool to allow users to collaboratively build, annotate, manage, share and reuse collections of distributed resources from the World Wide Web. This extends on the Walden's Path project's work to help educators bring resources found on the World Wide Web into a linear contextualized structure. The introduction of collaborative authoring feature fosters collaborative learning activities through social interaction among participants, where participants can coauthor paths in groups. Besides, the prototype supports path sharing, branching and reusing;specifically, individual participant can contribute to the group with private collections of knowledge resources;paths completed by group can be shared among group members, such that participants can tailor, extend, reorder and/or replace nodes to have sub versions of shared paths for different information needs. © 2012 Springer-Verlag.

关键词： World Wide Web

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Progressive parallel coordinates

Progressive parallel coordinates

引用

Pacific (formerly Asia-Pacific APVIS) Visualization Symposium

作者： René Rosenbaum Jian Zhi Bernd Hamann Visual Computing and Computer Graphics group (VCG) Institute for Computer Science University of Rostock Rostock Germany Institute for Data Analysis and Visualization (IDAV) Department of Computer Science University of California Davis CA USA Department of Industrial Engineering and Operations Research Columbia University NY USA

Progressive refinement is a methodology that makes it possible to elegantly integrate scalable data compression, access, and presentation into one approach. Specifically, this paper concerns the effective use of progressive parallel coordinates (PPCs), utilized routinely for high-dimensional data visualization. It discusses how the power of the typical stages of progressive data visualization can also be utilized fully for PPCs. Further, different implementations of the underlying methods and potential application domains are described. The paper also presents empirical results concerning the benefits of PPC with regard to efficient data management and improved presentation, indicating that the proposed approach is able to close the gap between data handling and visualization.

关键词： Lead Visualization Logic gates

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Distributing Power Grid State Estimation on HPC Clusters - A System Architecture Prototype

Distributing Power Grid State Estimation on HPC Clusters - A...

引用

IEEE International Symposium on Parallel and Distributed Processing Workshops and Phd Forum (IPDPSW)

作者： Yan Liu Wei Jiang Shuangshuang Jin Mark Rice Yousu Chen Data Intensive Computing Group Pacific Northwest National Laboratory Richland WA USA Department of Computer Science and Engineering Ohio State University Columbus OH USA Electrical Power Systems Engergy Pacific Northwest National Laboratory Richland WA USA

ISBN: (纸本)9781467309745

The future power grid is expected to further expand with highly distributed energy sources and smart loads. The increased size and complexity lead to increased burden on existing computational resources in energy control centers. Thus the need to perform real-time assessment on such systems entails efficient means to distribute centralized functions such as state estimation in the power system. In this paper, we present our experience of prototyping a system architecture that connects distributed state estimators individually running parallel programs to solve non-linear estimation procedure. Through our experience, we highlight the needs of integrating the distributed state estimation algorithm with efficient partition and data communication tools so that distributed state estimation has low overhead compared to the centralized solution. We build a test case based on the IEEE 118 bus system and partition the state estimation of the whole system model to available HPC clusters. The measurement from the test bed demonstrates the low overhead of our solution.

关键词： State estimation Computer architecture Size measurement Distributed databases Power grids Partitioning algorithms

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Trace chemical and major constituents measurements of the international space station atmosphere by the vehicle cabin atmosphere monitor

Trace chemical and major constituents measurements of the in...

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42nd International Conference on Environmental Systems 2012, ICES 2012

作者： Darrach, M.R. Chutjian, A. Bornstein, B.J. Croonquist, A.P. Garkanian, V. Hofman, J. Karmon, D. Kenny, J. Kidd, R.D. Lee, S. Macaskill, J.A. Madzunkov, S.M. Mandrake, L. Schaefer, R.T. Toomarian, N. Jet Propulsion Laboratory California Institute of Technology Pasadena CA 91109 United States Atomic and Molecular Physics Group JPL/Caltech Pasadena CA 91109 United States Instrument Autonomy Group JPL/Caltech Pasadena CA 91109 United States MicroDevices Group JPL/Caltech Pasadena CA 91109 United States Optical Communications Group JPL/Caltech Pasadena CA 91109 United States Instruments and Science Data Systems JPL/Caltech Pasadena CA 91109 United States Instrument Integration and Test JPL/Caltech Pasadena CA 91109 United States Planetary Chemistry and Astrobiology JPL/Caltech Pasadena CA 91109 United States High Capacity Computing and Modeling JPL/Caltech Pasadena CA 91109 United States Machine Learning and Instrument Autonomy Group JPL/Caltech Pasadena CA 91109 United States Advanced Computer Systems and Technology JPL/Caltech Pasadena CA 91109 United States Advanced Instrument Concepts JPL/Caltech Pasadena CA 91109 United States

ISBN: (纸本)9781600869341

We report on trace gas and major atmospheric constituents results obtained by the Vehicle Cabin Atmosphere Monitor (VCAM) following almost two years of operation aboard the International Space Station (ISS). VCAM isan autonomous environmental monitor based on a highly compact gas chromatograph/quadrupole ion trap mass spectrometer. It was flown to the International Space Station (ISS) on shuttle mission STS-131 and commenced operations on June 2010. VCAM is capable of providing measurements of both parts-per-billion (ppb) levels of volatile trace-gas constituents, and of the atmospheric major constituents (nitrogen, oxygen, argon, and carbon dioxide) in a space vehicle or station. It is designed to operate autonomously and maintenance-free, approximately once per day, with a self-contained gas supply sufficient for a one-year lifetime. VCAM's performance is sufficient to detect and identify 90% of the target compounds at their 180-day Spacecraft Maximum Allowable Concentration levels. © 2012 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Gases

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Mining hidden mixture context with ADIOS-P to improve predictive pre-fetcher accuracy

Mining hidden mixture context with ADIOS-P to improve predic...

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IEEE International Conference on e-science and Grid computing

作者： Jong Youl Choi Hasan Abbasi David Pugmire Norbert Podhorszki Scott Klasky Cristian Capdevila Manish Parashar Matthew Wolf Judy Qiu Geoffrey Fox Scientific Data Group Oak Ridge National Laboratory Oak Ridge Tennessee USA Electrical Engineering and Computer Science The University of Tennessee Knoxville Tennessee USA Electrical and Computer Engineering Rutgers University Piscataway New Jersey USA School of Computer Science Georgia Institute of Technology Atlanta Georgia USA School of Informatics and Computing Indiana University Bloomington Indiana USA

Predictive pre-fetcher, which predicts future data access events and loads the data before users requests, has been widely studied, especially in file systems or web contents servers, to reduce data load latency. Especially in scientific data visualization, pre-fetching can reduce the IO waiting time. In order to increase the accuracy, we apply a data mining technique to extract hidden information. More specifically, we apply a data mining technique for discovering the hidden contexts in data access patterns and make prediction based on the inferred context to boost the accuracy. In particular, we performed Probabilistic Latent Semantic Analysis (PLSA), a mixture model based algorithm popular in the text mining area, to mine hidden contexts from the collected user access patterns and, then, we run a predictor within the discovered context. We further improve PLSA by applying the Deterministic Annealing (DA) method to overcome the local optimum problem. In this paper we demonstrate how we can apply PLSA and DA optimization to mine hidden contexts from users data access patterns and improve predictive pre-fetcher performance.

关键词： Context Prediction algorithms Clustering algorithms Accuracy data mining data visualization Algorithm design and analysis

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Multilingual adaptive search for digital libraries

引用

Lecture Notes in Computer science

作者： Ghorab, M. Rami Leveling, Johannes Lawless, Séamus O'Connor, Alexander Zhou, Dong Jones, Gareth J. F. Wade, Vincent Knowledge and Data Engineering Group School of Computer Science and Statistics Trinity College Dublin Dublin 2 Ireland CNGL School of Computing Dublin City University Dublin 9 Ireland

ISBN: (纸本)9783642244681

We describe a framework for Adaptive Multilingual Information Retrieval (AMIR) which allows multilingual resource discovery and delivery using on-the-fly machine translation of documents and queries. Result documents are presented to the user in a contextualised manner. Challenges and affordances of both adaptive and multilingual IR, with a particular focus on digital libraries, are detailed. The framework components are motivated by a series of results from experiments on query logs and documents from The European Library. We conclude that factoring adaptivity and multilinguality aspects into the search process can enhance the user's experience with online digital libraries. © 2011 Springer-Verlag.

关键词： Digital libraries

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A semantic model for integrated content management, localisation and language technology processing

A semantic model for integrated content management, localisa...

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2nd International Workshop on the Multilingual Semantic Web 2011, MSW 2011 - In Conjunction with the International Semantic Web Conference, ISWC 2011

作者： Jones, Dominic O'Connor, Alexander Abgaz, Yalemisew M. Lewis, David Centre for Next Generation Localisation School of Computer Science and Statistics Trinity College Dublin Ireland Knowledge and Data Engineering Group School of Computer Science and Statistics Trinity College Dublin Ireland School of Computing Dublin City University Dublin Ireland

Providers of products and services are faced with the dual challenge of supporting the languages and individual needs of the global customer while also accommodating the increasing relevance of user-generated content. As a result, the content and localisation industries must now evolve rapidly from manually processing predicable content which arrives in large jobs to the highly automated processing of streams of fast moving, heterogeneous and unpredictable content. This requires a new generation of digital content management technologies that combine the agile flow of content from developers to localisers and consumers with the data-driven language technologies needed to handle the volume of content required to feed the demands of global markets. data-driven technologies such as statistical machine translation, cross-lingual information retrieval, sentiment analysis and automatic speech recognition, all rely on high quality training content, which in turn must be continually harvested based on the human quality judgments made across the end-to-end content processing flow. This paper presents the motivation, approach and initial semantic models of a collection of research demonstrators where they represent a part of, or a step towards, documenting in a semantic model the multi-lingual semantic web.

关键词： Semantic Web

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Building a geographical ontology by using Wikipedia

Building a geographical ontology by using Wikipedia

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13th International Conference on Information Integration and Web-Based Applications and Services, iiWAS2011

作者： Hung-Ngo, Quoc Doan, Son Winiwarter, Werner Faculty of Computer Science University of Information Technology Vietnam National University HCM City Viet Nam National Institute of Informatics 2-1-2 Hitotsubashi Chiyoda-ku Tokyo 101-8430 Japan University of Vienna Research Group Data Analytics and Computing Universitätsstraße 5 1010 Vienna Austria

This paper introduces an approach to build a geographical ontology of countries at the global scale. Our approach is based on the free online encyclopedia Wikipedia to extract lists of places, then rebuild a hierarchy... 详细信息

ISBN: (纸本)9781450307840

关键词： Ontology

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