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检索条件"机构=Computer Vision for Human Computer Interaction Lab."

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Finding comparable temporal categorical records: A similarity measure with an interactive visualization

Finding comparable temporal categorical records: A similarit...

引用

VAST 09 - IEEE Symposium on Visual Analytics Science and Technology

作者： Wongsuphasawat, Krist Shneiderman, Ben Department of Computer Science Human-Computer Interaction Lab. University of Maryland College Park MD 20742 United States

ISBN: (纸本)9781424452835

An increasing number of temporal categorical databases are being collected: Electronic Health Records in healthcare organizations, traffic incident logs in transportation systems, or student records in universities. Finding similar records within these large databases requires effective similarity measures that capture the searcher's intent. Many similarity measures exist for numerical time series, but temporal categorical records are different. We propose a temporal categorical similarity measure, the M&M (Match & Mismatch) measure, which is based on the concept of aligning records by sentinel events, then matching events between the target and the compared records. The M&M measure combines the time differences between pairs of events and the number of mismatches. To accommodate customization of parameters in the M&M measure and results interpretation, we implemented Similan, an interactive search and visualization tool for temporal categorical records. A usability study with 8 participants demonstrated that Similan was easy to learn and enabled them to find similar records, but users had difficulty understanding the M&M measure. The usability study feedback, led to an improved version with a continuous timeline, which was tested in a pilot study with 5 participants. ©2009 IEEE.

关键词： Visualization

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On the internet, everybody knows you're a dog: The human-pet relationship in online social networks

On the internet, everybody knows you're a dog: The human-pet...

引用

27th International Conference Extended Abstracts on human Factors in Computing Systems, CHI 2009

作者： Golbeck, Jennifer Human-Computer Interaction Lab. University of Maryland College Park MD 20742 United States

ISBN: (纸本)9781605582474

The benefits of pet ownership to physical and mental health are extensive and well documented. Online social networks have the potential to strengthen these relationships and build community among pet owners. In this work, we present several results on the difference in behavior between dog and cat owners in pet-oriented social networks. We extend this analysis to divisions between urban and rural users. Our results show that there are significant differences among these groups. We propose a theory for future testing that more socially isolated the owners are from real-world communities of similar pet owners, the more active they are in forming social connections on these websites, and we offer initial evidence to support this. These results show that these pet social networks are already being used to help support the human-animal bond online, and that different types of pet owners would benefit from different types of support within the systems.

关键词： Social networking (online)

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3D object arrangement for novice users: The effectiveness of combining a first-person and a map view 09

3D object arrangement for novice users: The effectiveness of...

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VRST 2009 - 16th ACM Symposium on Virtual Reality Software and Technology

作者： Chittaro, Luca Ranon, Roberto Ieronutti, Lucio Human-Computer Interaction Lab. Department of Mathematics and Computer Science University of Udine Via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)9781605588698

Arranging 3D objects in Virtual Environments can be a complex, error prone and time consuming task, especially for users who are not familiar with interfaces for 3D navigation and object manipulation. In this paper, we analyze and compare novice users' performance on 3D object arrangement tasks using three interfaces that differ in the views of the 3D environment they provide: the first one is based only on a first-person view;the second one combines the first-person view and a map view in which the zoom level is manually controlled by the user;the third one extends the second with automated assistance in controlling the map zoom level during object manipulation. Our study shows that users without prior experience in 3D object arrangement prefer and actually benefit from having a map view in addition to a first person view in object arrangement tasks. Copyright © 2009 by the Association for Computing Machinery, Inc.

关键词： Virtual reality

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Tutorial on using social trust for recommender systems

Tutorial on using social trust for recommender systems

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3rd ACM Conference on Recommender Systems, RecSys'09

作者： Golbeck, Jennifer Human-Computer Interaction Lab. University of Maryland College Park College Park MD United States

ISBN: (纸本)9781605584355

As the Web has shifted to an interactive environment where vast amounts of content is created by users, the question of whom to trust and what information to trust has become both more important and more difficult to answer. At the same time, social networks have become very popular with over a billion accounts shared across hundreds of networks. Social trust relationships, derived from social networks, are uniquely suited to speak to the quality of online information;recommender systems are designed to personalize, sort, aggregate, and highlight information. Merging social networks, trust, and recommender systems can improve the accuracy of recommendations and improve the user's experience. In this tutorial, we will cover the use of social trust in recommender systems. Topics including the computation of trust in social networks, integration of trust into recommender systems, and a discussion of when trust offers benefits and the challenges it presents.

关键词： Recommender systems

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Wii can do it: Using co-design for creating an instructional game

Wii can do it: Using co-design for creating an instructional...

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27th International Conference Extended Abstracts on human Factors in Computing Systems, CHI 2009

作者： Walsh, Greg Human-Computer Interaction Lab. University of Maryland College Park 2117 Hornbake Bldg South Wing College Park MD 20742 United States

ISBN: (纸本)9781605582474

There are many children for whom learning is difficult if they need to remain still. The Nintendo Wii, with its motion-controlled sensors, can support learning experiences that enable children to be physically active learners. This paper presents the methodologies and results from a multi-day, co-design session at the University of Maryland's human-computer interaction lab. The goal of the sessions was to design an instructional game that leveraged the Nintendo Wii's motion controls to teach about U.S. National Parks.

关键词： human computer interaction

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human pose estimation from monocular image captures

Human pose estimation from monocular image captures

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2009 IEEE International Conference on Multimedia and Expo, ICME 2009

作者： Lin, Huei-Yung Chen, Ting-Wen Chen, Chih-Chang Hsieh, Chia-Hao Lie, Wen-Nung Department of Electrical Engineering National Chung Cheng University Chiayi 621 Taiwan Human Computer Interaction Lab. Industrial Technology Research Institute Tainan 734 Taiwan

ISBN: (纸本)9781424442911

A human pose estimation method from monocular image captures is presented. The objective is to develop a human-computer interface (HCI) for virtual sport activities. In the proposed technique, a graphical 3D human model is first constructed. Its projection on a virtual image plane is then used to match the silhouettes obtained from the image sequence. By iteratively adjusting the 3D pose of the graphical 3D model with the physical and anatomic constraints of human motion, the human pose and the associate 3D motion parameters can be uniquely identified. Experimental results are presented with the real scene images. ©2009 IEEE.

关键词： Iterative methods

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Generating high-coverage semantic orientation lexicons from overtly marked words and a thesaurus

Generating high-coverage semantic orientation lexicons from ...

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2009 Conference on Empirical Methods in Natural Language Processing, EMNLP 2009, Held in Conjunction with ACL-IJCNLP 2009

作者： Mohammad, Saif Dunne, Cody Dorr, Bonnie Laboratory for Computational Linguistics and Information Processing University of Maryland United States Human-Computer Interaction Lab. University of Maryland United States Institute for Advanced Computer Studies University of Maryland United States Department of Computer Science University of Maryland United States Human Language Technology Center of Excellence United States

Sentiment analysis often relies on a semantic orientation lexicon of positive and negative words. A number of approaches have been proposed for creating such lexicons, but they tend to be computationally expensive, and usually rely on significant manual annotation and large corpora. Most of these methods use WordNet. In contrast, we propose a simple approach to generate a high-coverage semantic orientation lexicon, which includes both individual words and multi-word expressions, using only a Roget-like thesaurus and a handful of affixes. Further, the lexicon has properties that support the Polyanna Hypothesis. Using the General Inquirer as gold standard, we show that our lexicon has 14 percentage points more correct entries than the leading WordNet-based high-coverage lexicon (SentiWordNet). In an extrinsic evaluation, we obtain significantly higher performance in determining phrase polarity using our thesaurus-based lexicon than with any other. Additionally, we explore the use of visualization techniques to gain insight into the our algorithm beyond the evaluations mentioned above. © 2009 ACL and AFNLP.

关键词： Thesauri

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First steps to NetViz Nirvana: Evaluating social network analysis with NodeXL

First steps to NetViz Nirvana: Evaluating social network ana...

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2009 IEEE International Conference on Social Computing, SocialCom 2009

作者： Bonsignore, Elizabeth M. Dunne, Cody Rotman, Dana Smith, Marc Capone, Tony Hansen, Derek L. Shneiderman, Ben University of Maryland College Park MD 20742 United States Center for Advanced Study of Communities College of Information Studies United States Human-Computer Interaction Lab. Department of Computer Science United States Telligent Systems Corporation Microsoft Corporation United States Hornbake Library United States

ISBN: (纸本)9780769538235

Social Network Analysis (SNA) has evolved as a popular, standard method for modeling meaningful, often hidden structural relationships in communities. Existing SNA tools often involve extensive pre-processing or intensive programming skills that can challenge practitioners and students alike. NodeXL, an open-source template for Microsoft Excel, integrates a library of common network metrics and graph layout algorithms within the familiar spreadsheet format, offering a potentially low-barrierto- entry framework for teaching and learning SNA. We present the preliminary findings of 2 user studies of 21 graduate students who engaged in SNA using NodeXL. The majority of students, while information professionals, had little technical background or experience with SNA techniques. Six of the participants had more technical backgrounds and were chosen specifically for their experience with graph drawing and information visualization. Our primary objectives were (1) to evaluate NodeXL as an SNA tool for a broad base of users and (2) to explore methods for teaching SNA. Our complementary dual case-study format demonstrates the usability of NodeXL for a diverse set of users, and significantly, the power of a tightly integrated metrics/visualization tool to spark insight and facilitate sensemaking for students of SNA. © 2009 IEEE.

关键词： Students

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Multi-point touch input method for Korean text entry

Multi-point touch input method for Korean text entry

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27th International Conference Extended Abstracts on human Factors in Computing Systems, CHI 2009

作者： Shin, Heesook Lee, Woohun Lee, Geehyuk Cho, Ilyeon Wearable Computing Research Team Electronics and Telecommunications Research Institute 161 Gajeongno Yuseong-gu Daejeon Korea Republic of Design Media Lab. Korea Advanced Institute of Science and Technology 335 Gwahangno Yuseong-gu Deajeon Korea Republic of Human Computer Interaction Lab. Information and Communications University 119 Munjiro Yuseong-gu Daejeon Korea Republic of

ISBN: (纸本)9781605582474

Multi-touch interfaces are becoming popular as a new input means for the various applications. In this paper, we suggest a new Korean text entry method using a multi-touch interface called MPT (Multi-Point Touch) input method. We conducted a text entry performance test comprising 4 sessions for 10 participants, and compared the result with an existing commercial SPT (Single-Point Touch) input method. The experimental results show that the entry speed of MPT was slower than that of SPT method in the initial session. However, the entry speed of MPT input method was improved more rapidly than the speed of SPT method as sessions were proceeded. We observed a statistically significant learning effect from the result of MPT method. Moreover, we found no significant difference between the task loads of SPT and MPT input methods.

关键词： Multi-touch Text entry

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Eek! a mouse! organic user interfaces: Tangible, transitive materials and programmable reality

Eek! a mouse! organic user interfaces: Tangible, transitive ...

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27th International Conference Extended Abstracts on human Factors in Computing Systems, CHI 2009

作者： Vertegaal, Roel Ishii, Hiroshi Poupyrev, Ivan Kodama, Sachiko Biloria, Nimish Maes, Pattie Goldstein, Seth Rekimoto, Jun Human Media Lab. Queen's University Kingston NS Canada MIT Media Lab. Cambridge MA United States Interaction Laboratory Sony CSL Inc. Tokyo Japan University of Electro-Communications Tokyo Japan TU Delft Netherlands Computer Science Dept. Carnegie Mellon University Pittsburgh PA United States Interfaculty Initiative in Information Studies University of Tokyo Japan Interaction Laboratory SONY CSL Inc. Tokyo Japan

ISBN: (纸本)9781605582474

In this panel, we explore the role emerging transitive materials, like flexible thin-film displays, multi-touch input skins, e-textiles, micro-actuators and Claytronics might play in re-defining the human interface towards a programmable form of reality. Panelist will extrapolate historical trends from Tangibles to new developments in organic user interfaces, trying to identify a future in which interfaces will no longer be predominantly flat, but instead have any possible shape or form: from skins that are foldable, flexible and physical to three-dimensional products that are fully kinetic.

关键词： Interfaces (materials)

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