检索结果-内蒙古大学图书馆

IEEE Symposium on Visual Analytics science and Technology (VAST)

作者： Jerry Alan Fails Amy Karlson Layla Shahamat Ben Shneiderman Department of Computer Science & Human-Computer Interaction Lab University of Maryland College Park Maryland USA Department of Computer Science & Human-Computer Interaction Lab University of Maryland College Park Maryland

Finding patterns of events over time is important in searching patient histories, Web logs, news stories, and criminal activities. This paper presents PatternFinder, an integrated interface for query and result-set visualization for search and discovery of temporal patterns within multivariate and categorical data sets. We define temporal patterns as sequences of events with inter-event time spans. PatternFinder allows users to specify the attributes of events and time spans to produce powerful pattern queries that are difficult to express with other formalisms. We characterize the range of queries PatternFinder supports as users vary the specificity at which events and time spans are defined. Pattern Finder's query capabilities together with coupled ball-and-chain and tabular visualizations enable users to effectively query, explore and analyze event patterns both within and across data entities (e.g. patient histories, terrorist groups, Web logs, etc.)

关键词： History Visual databases Data visualization Spatial databases computer science User interfaces Database languages Medical treatment Pattern analysis Chromium

来源：评论

学校读者我要写书评

暂无评论

Effects of feedback and dwell time on eye typing speed and accuracy

引用

Universal Access in the Information Society 2006年第2期5卷 199-208页

作者： Majaranta, Päivi MacKenzie, I. Scott Aula, Anne Räihä, Kari-Jouko Unit for Human–Computer Interaction (TAUCHI) Department of Computer Sciences University of Tampere Tampere Finland Department of Computer Science and Engineering York University Toronto Canada

Eye typing provides a means of communication that is especially useful for people with disabilities. However, most related research addresses technical issues in eye typing systems, and largely ignores design issues. This paper reports experiments studying the impact of auditory and visual feedback on user performance and experience. Results show that feedback impacts typing speed, accuracy, gaze behavior, and subjective experience. Also, the feedback should be matched with the dwell time. Short dwell times require simplified feedback to support the typing rhythm, whereas long dwell times allow extra information on the eye typing process. Both short and long dwell times benefit from combined visual and auditory feedback. Six guidelines for designing feedback for gaze-based text entry are provided.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Three-dimensional path planning of unmanned aerial vehicles using particle swarm optimization

Three-dimensional path planning of unmanned aerial vehicles ...

引用

11th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference

作者： Jung, Leng Foo Knutzon, Jared S. Oliver, James H. Winer, Eliot H. Virtual Reality Applications Center Iowa State University Ames IA 50010 United States Department of Mechanical Engineering and Human Computer Interaction 2274 Howe Hall Iowa State University Ames IA 50010 United States Department of Human Computer Interaction 2274 Howe Hall Iowa State University Ames IA 50010 United States

ISBN: (纸本)1563478234

Military operations are turning to more complex and advanced automation technology for minimum risk and maximum efficiency. A critical piece to this strategy is unmanned aerial vehicles (UAVs'). UAVs require the intelligence to safely maneuver along a path to an intended target, avoiding obstacles such as other aircrafts or enemy threats. Often automated path planning algorithms are employed to specify targets for a UAV to fly to. To date, path-planning algorithms have been limited to two-dimensional problem formulations. This paper presents a unique three-dimensional path planning problem formulation and solution approach using Particle Swarm Optimization (PSO). The problem formulation was designed to minimize risk due to enemy threats while simultaneously minimizing fuel consumption. The initial design point is a straight path between the current position and the desired target. Using PSO, an optimized path is generated through B-spline curves. The resulting paths can be optimized with a preference towards maximum safety, minimum fuel consumption or a combination of the two. The problem formulation and solution implementation is described along with the results from several simulated scenarios.

关键词： Unmanned vehicles

来源：评论

学校读者我要写书评

暂无评论

Overcoming World in Miniature Limitations by a Scaled and Scrolling WIM

Overcoming World in Miniature Limitations by a Scaled and Sc...

引用

IEEE Symposium on 3D User Interfaces (3DUI)

作者： C.A. Wingrave Y. Haciahmetoglu D.A. Bowman Department of Computer Science Center for Human Computer Interaction Virginia Polytechnic Institute and State University Blacksburg VA USA

The World In Miniature (WIM) technique has effectively allowed users to interact and travel efficiently in Virtual Environments. However, WIM fails to work in worlds with tasks at various levels of scale. Such an example is using the WIM to arrange furniture and then leaving the room to travel the city using the WIM for navigation and wayfinding. To address this problem, scaling and scrolling were added to the WIM to create the Scaled Scrolling World In Miniature (SSWIM). The interface and testbed were iteratively created under expert evaluation and multiple formative user evaluations led to the final design. The WIM and SSWIM were then compared inside three differently sized cities by users who located a sphere and traveled into it to read the label at the sphere’s center. Users were administered two standard psychology tests to account for spatial orientation (Cube Comparison Test) and spatial scanning (Maze Tracing Test) factors. The results show that the SSWIM’s added functionality, and hence complexity, caused no significant hit in user performance and additionally that users were able to use SSWIM effectively after a short instructional period. To better understand the effect of experience, a follow-up experiment was performed showing performance plateaued after ten to fifteen minutes of use.

关键词： Testing Cities and towns Visualization computer science human computer interaction Virtual environment Navigation Psychology User interfaces Graphical user interfaces

来源：评论

学校读者我要写书评

暂无评论

Target size study for one-handed thumb use on small touchscreen devices 06

Target size study for one-handed thumb use on small touchscr...

引用

8th International Conference on human-computer interaction with Mobile Devices and Services, MobileHCI 2006

作者： Parhi, Pekka Karlson, Amy K. Bederson, Benjamin B. Media Team Oulu Department of Electrical and Information Engineering University of Oulu P.O. Box 4500 FIN-90014 Oulu Finland Human-Computer Interaction Lab. Computer Science Department University of Maryland College Park MD

ISBN: (纸本)1595933905

This paper describes a two-phase study conducted to determine optimal target sizes for one-handed thumb use of mobile handheld devices equipped with a touch-sensitive screen. Similar studies have provided recommendations for target sizes when using a mobile device with two hands plus a stylus, and interacting with a desktop-sized display with an index finger, but never for thumbs when holding a small device in a single hand. The first phase explored the required target size for single-target (discrete) pointing tasks, such as activating buttons, radio buttons or checkboxes. The second phase investigated optimal sizes for widgets used for tasks that involve a sequence of taps (serial), such as text entry. Since holding a device in one hand constrains thumb movement, we varied target positions to determine if performance depended on screen location. The results showed that while speed generally improved as targets grew, there were no significant differences in error rate between target sizes ≥ 9.6 mm in discrete tasks and targets ≥ 7.7 mm in serial tasks. Along with subjective ratings and the findings on hit response variability, we found that target size of 9.2 mm for discrete tasks and targets of 9.6 mm for serial tasks should be sufficiently large for one-handed thumb use on touchscreen-based handhelds without degrading performance and preference. Copyright 2006 ACM.

关键词： Fluorescent screens

来源：评论

学校读者我要写书评

暂无评论

A grammatical approach to understanding textual tables using two-dimensional SCFGs 21

A grammatical approach to understanding textual tables using...

引用

21st International Conference on Computational Linguistics and 44th Annual Meeting of the Association for Computational Linguistics, COLING/ACL 2006

作者： Wu, Dekai Lee, Ken Wing Kuen Human Language Technology Center HKUST Department of Computer Science and Engineering University of Science and Technology Clear Water Bay Hong Kong

We present an elegant and extensible model that is capable of providing semantic interpretations for an unusually wide range of textual tables in documents. Unlike the few existing table analysis models, which largely rely on relatively ad hoc heuristics, our linguistically-oriented approach is systematic and grammar based, which allows our model (1) to be concise and yet (2) recognize a wider range of data models than others, and (3) disambiguate to a significantly finer extent the underlying semantic interpretation of the table in terms of data models drawn from relation database theory. To accomplish this, the model introduces Viterbi parsing under two-dimensional stochastic CFGs. The cleaner grammatical approach facilitates not only greater coverage, but also grammar extension and maintenance, as well as a more direct and declarative link to semantic interpretation, for which we also introduce a new, cleaner data model. In disambiguation experiments on recognizing relevant data models of unseen web tables from different domains, a blind evaluation of the model showed 60% precision and 80% recall. © 2006 Association for Computational Linguistics

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

Mica: A Web-Search Tool for Finding API Components and Examples

Mica: A Web-Search Tool for Finding API Components and Examp...

引用

IEEE Symposium on Visual Languages and human Centric Computing (VL/HCC)

作者： J. Stylos B.A. Myers Computer Science Department Human-Computer Interaction Institute Carnegie Mellon University Pittsburgh PA USA

Because software libraries are numerous and large, learning how to use them is a common and problematic task for experienced programmers and novices alike. Internet search engines such as Google have emerged as important resources to help programmers successfully use APIs. However, observations of programmers using Web search have revealed problems and inefficiencies in their use. We present a new prototype search tool called Mica that augments standard Web search results to help programmers find the right API classes and methods given a description of the desired functionality, and help programmers find examples when they already know which methods to use. Mica works by using the Google Web APIs to find relevant pages, and then analyzing the content of those pages to extract the most relevant programming terms and to classify the type of each result

关键词： Programming profession Web search Search engines Documentation Software libraries Application software Java Terminology computer science Internet

来源：评论

学校读者我要写书评

暂无评论

An evaluation of using programming by demonstration and guided walkthrough techniques for authoring and utilizing documentation 06

An evaluation of using programming by demonstration and guid...

引用

CHI 2006: Conference on human Factors in Computing Systems

作者： Prabaker, Madhu Bergman, Lawrence Castelli, Vittorio Human-Computer Interaction Institute School of Computer Science Carnegie Mellon University 5000 Forbes Avenue Pittsburgh PA 15213 United States IBM T.J. Watson Research Center 19 Skyline Drive Hawthorne NY 10520 United States

ISBN: (纸本)1595931783

Much existing documentation is informal and serves to communicate "how-to" knowledge among restricted working groups. Using current practices, such documentation is both difficult to maintain and difficult to use properly. In this paper, we propose a documentation system, called DocWizards, that uses programming by demonstration to support low-cost authoring and guided walkthrough techniques to improve document usability. We report a comparative study between the use of DocWizards and traditional techniques for authoring and following documentation. The study participants showed significant gains in efficiency and reduction in error rates when using DocWizards. In addition, they expressed a clear preference for using the DocWizards tool, both for authoring and for following documentation. Copyright 2006 ACM.

关键词： Program documentation

来源：评论

学校读者我要写书评

暂无评论

Categorizing web search results into meaningful and stable categories using fast-feature techniques

Categorizing web search results into meaningful and stable c...

引用

IEEE/ACM Joint Conference on Digital Libraries(JCDL)

作者： Jack Kustanowitz Ben Shneiderman Bill Kules Human-Computer Interaction Laboratory and Department of Computer Science University of Maryland College Park MD USA

When search results against digital libraries and Web resources have limited metadata, augmenting them with meaningful and stable category information can enable better overviews and support user exploration. This paper proposes six "fast-feature" techniques that use only features available in the search result list, such as title, snippet, and URL, to categorize results into meaningful categories. They use credible knowledge resources, including a US government organizational hierarchy, a thematic hierarchy from the open directory project (ODP) Web directory, and personal browse histories, to add valuable metadata to search results. In three tests the percent of results categorized for five representative queries was high enough to suggest practical benefits: general Web search (76-90%), government Web search (39-100%), and the Bureau of Labor Statistics Website (48-94%). An additional test submitted 250 TREC queries to a search engine and successfully categorized 66% of the top 100 using the ODP and 61% of the top 350. Fast-feature techniques have been implemented in a prototype search engine. We propose research directions to improve categorization rates and make suggestions about how Web site designers could re-organize their sites to support fast categorization of search results

关键词： Web search Testing Search engines Software libraries Uniform resource locators US Government History Statistical analysis Prototypes Web page design

来源：评论

学校读者我要写书评

暂无评论

Boosting for Chinese named entity recognition 5

Boosting for Chinese named entity recognition

引用

5th SIGHAN Workshop on Chinese Language Processing, co-located with COLING/ACL 2006

作者： Yu, Xiaofeng Carpuat, Marine Wu, Dekai Human Language Technology Center HKUST Department of Computer Science and Engineering University of Science and Technology Clear Water Bay Hong Kong Hong Kong

ISBN: (纸本)1932432701

We report an experiment in which a high-performance boosting based NER model originally designed for multiple European languages is instead applied to the Chinese named entity recognition task of the third SIGHAN Chinese language processing bakeoff. Using a simple character-based model along with a set of features that are easily obtained from the Chinese input strings, the system described employs boosting, a promising and theoretically well-founded machine learning method to combine a set of weak classifiers together into a final system. Even though we did no other Chinese-specific tuning, and used only one-third of the MSRA and CityU corpora to train the system, reasonable results are obtained. Our evaluation results show that 75.07 and 80.51 overall F-measures were obtained on MSRA and CityU test sets respectively. © 2006 Association for Computational Linguistics.

关键词： Adaptive boosting

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：