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Proceedings of the SIGCHI Conference on human Factors in Computing Systems

作者： Golbeck, Jennifer Hansen, Derek L. Human-Computer Interaction Lab. College of Information Studies University of Maryland College Park MD 20742 United States Human-Computer Interaction Lab. CASCI College of Information Studies College Park MD 20742 United States

ISBN: (纸本)9781450302289

There is great interest in understanding media bias and political information seeking preferences. As many media outlets create online personas, we seek to automatically estimate the political preferences of their audience, rather than of the outlet itself. In this paper, we present a novel method for computing preference among an organization's Twitter followers. We present an application of this technique to estimate political preference of the audiences of U.S. media outlets. We also discuss how these results may be used and extended. Copyright 2011 ACM.

关键词： Social networking (online)

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Designing a mobile persuasive application to encourage reduction of users' exposure to cell phone RF emissions

Designing a mobile persuasive application to encourage reduc...

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9th International Conference on Persuasive Technology, PERSUASIVE 2014

作者： Burigat, Stefano Chittaro, Luca Human-Computer Interaction Lab. Department of Mathematics and Computer Science University of Udine via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)9783319071268

The International Agency for Research on Cancer classifies radiofrequency (RF) electromagnetic emissions of cell phones as possibly carcinogenic to humans [1] and suggests the use of hands-free devices such as earphones to reduce direct exposure of the brain to such emissions. In this paper, we present the design of a mobile application that exploits persuasive principles to encourage the use of earphones during cell phone calls. We propose different notifications and visualizations aimed at informing the user about her behavior with respect to earphone use and discuss the results of a user study that was aimed at investigating aspects such as understandability, emotional impact, and perceived usefulness of the proposed solutions. Results of the study are used to inform the design of the application. To the best of our knowledge, this is the first investigation of persuasive technologies applied to the reduction of user's exposure to cell phone RF emissions. © 2014 Springer International Publishing.

关键词： Cellular telephones

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A distributed virtual environment for emergency medical training

A distributed virtual environment for emergency medical trai...

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Conference on Modeling, Simulation, and Visualization of Sensory Response for Defense Applications

作者： Stytz, MR Banks, SB Garcia, BW GodsellStytz, GM Virtual Environments Laboratory Human-Computer Interaction Lab. Air Force Institute of Technology Dayton OH United States

ISBN: (纸本)0819425001

In many professions where individuals must work in a team in a high stress environment to accomplish a time-critical task, individual and team performance can benefit from joint twining using distributed virtual environments (DVEs). One professional Geld that lacks but needs a high-fidelity team training environment is the field of Emergency Medicine. Currently, Emergency Department (ED) medical. personnel train by using words to create a mental picture of a situation for the physician and staff, who then cooperate to solve the problems portrayed by the word picture. The need in Emergency Medicine for realistic virtual team training is critical because ED staff typically encounter rarely occurring but life threatening situations only once in their careers and because ED teams currently have no realistic environment in which to practice their team skills. The resulting lack of experience and teamwork makes diagnosis and treatment more difficult. Virtual environment based training has the potential to redress these shortfalls. The objective of our research is to develop a state-of-the-art virtual environment for emergency medicine team training. The Virtual Emergency Room (VER) allows ED physicians and medical staff to realistically prepare for emergency medical situations by performing triage, diagnosis, and treatment on virtual patients within an environment that provides them with the tools they require and the team environment they need to realistically perform these three tasks. There are several issues that must be addressed before this vision is realized. The key issues deal with distribution of computations;the doctor and staff interface to the virtual patient and ED equipment;the accurate simulation of individual patient organs' response to injury, medication, and treatment;and an accurate modeling of the symptoms and appearance of the patient while maintaining a real-time interaction capability. Our ongoing work addresses all of these issues. In this paper w

关键词： virtual environments distributed interactive simulation medical virtual environments medical virtual environments for training

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Three-dimensional computation visualization for computer graphics rendering algorithms

SIGCSE Bulletin (Association for Computing Machinery, Specia...

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SIGCSE Bulletin (Association for Computing Machinery, Special Interest Group on computer Science Education) 1996年第1期28卷 358-362页

作者： Goldman, David A. Eckert, Richard R. Watson, Thoms J. Cohen, Maxine S. Human Computer Interaction Lab Computer Science Dep

Computation visualization or algorithm animation is becoming an increasingly popular and effective way of teaching, debugging, and analyzing algorithms. Over the past ten years, several algorithm animation systems have been produced. Proposed here is a new approach and framework for visualizing three-dimensional algorithms or computations. Implemented on a prototype algorithm animation system, this framework, termed the vector-guided view, produces insightful visualizations of three-dimensional computation by effectively solving the problems of 3D scene navigation. The creation of this framework was motivated by the desire to produce visualizations of an increasingly large and complex set of rendering algorithms now ubiquitous in the field of computer graphics. To show the potential of this framework, a dynamic visualization of a recursive ray-tracing program has been created. A brief summary of the algorithm animation system is presented.

关键词： Algorithms

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Tailoring web pages for persuasion on prevention topics: Message framing, color priming, and gender 11th

Tailoring web pages for persuasion on prevention topics: Mes...

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11th International Conference on Persuasive Technology, PERSUASIVE 2016

作者： Chittaro, Luca Human-Computer Interaction Lab University of Udine via delle Scienze 206 Udine33100 Italy

ISBN: (纸本)9783319315096

On the Web, as in more traditional influence contexts, the most effective persuasive strategies often depend on the individual characteristics of the message recipient. Unfortunately, most persuasive technology applications currently employ a one-size-fits-all approach to interventions. The study we illustrate investigates two different techniques (message framing and color priming) that can be used in tailoring a persuasive Web page about a prevention topic. The findings of our study highlight interactive effects between message framing and color priming, and advance the results in the literature by showing that red enhances the effects of framing in a gender-based fashion. The obtained results also provide practical guidance for automatic tailoring of persuasive Web pages about prevention topics, suggesting a strategy based on gender, an information about the user that is typically readily available in social network profiles, and other Web sites to which people register. © Springer International Publishing Switzerland 2016.

关键词： Color

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DFM4SFM - Dense Feature Matching for Structure from Motion

DFM4SFM - Dense Feature Matching for Structure from Motion

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2023 IEEE International Conference on Image Processing Challenges and Workshops, ICIPCW 2023

作者： Seibt, Simon Von Rymon Lipinski, Bartosz Chang, Thomas Latoschik, Marc Erich Nuremberg Institute of Technology Game Tech Lab Faculty of Computer Science Nuremberg Germany Institute of Computer Science University of Wuerzburg Human-Computer Interaction Group Wuerzburg Germany

ISBN: (纸本)9798350302585

Structure from motion (SfM) is a fundamental task in computer vision and allows recovering the 3D structure of a stationary scene from an image set. Finding robust and accurate feature matches plays a crucial role in the early stages of SfM. So in this work, we propose a novel method for computing image correspondences based on dense feature matching (DFM) using homographic decomposition: The underlying pipeline provides refinement of existing matches through iterative rematching, detection of occlusions and extrapolation of additional matches in critical image areas between image pairs. Our main contributions are improvements of DFM specifically for SfM, resulting in global refinement and global extrapolation of image correspondences between related views. Furthermore, we propose an iterative version of the Delaunay-triangulation-based outlier detection algorithm for robust processing of repeated image patterns. Through experiments, we demonstrate that the proposed method significantlv improves the reconstruction accuracy. © 2023 IEEE.

关键词： computer vision

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LifeFlow: Visualizing an overview of event sequences (video preview)

LifeFlow: Visualizing an overview of event sequences (video ...

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作者： Wongsuphasawat, Krist Wang, Taowei David Gómez, John Alexis Guerra Taieb-Maimon, Meirav Plaisant, Catherine Ben, Shneiderman Human-Computer Interaction Lab. Dept. of Computer Science University of Maryland College Park MD 20742 United States Human-Computer Interaction Lab. University of Maryland College Park MD 20742 United States Ben-Gurion University of the Negev Beer-Sheva Israel

ISBN: (纸本)9781450302289

Event sequence analysis is an important task in many domains: medical researchers may study the patterns of transfers within the hospital for quality control;transportation experts may study accident response logs to identify best practices. In many cases they deal with thousands of records. While previous research has focused on searching and browsing, overview tasks are often overlooked. We introduce a novel interactive visual overview of event sequences called LifeFlow. LifeFlow is scalable, can summarize all possible sequences, and represents the temporal spacing of the events within sequences. In this video, we show an example of patient transfer data and briefly demonstrate how to analyze them with LifeFlow. Please see [11] or visit http://***/hcil/lifeflowformoredetail.

关键词： Visualization

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Passengers' safety in aircraft evacuations: Employing serious games to educate and persuade

Passengers' safety in aircraft evacuations: Employing seriou...

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7th International Conference on Persuasive Technology, PERSUASIVE 2012

作者： Chittaro, Luca Human-Computer Interaction Lab. University of Udine via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)9783642310362

The field of persuasive technology has only recently started to investigate how virtual experiences of risk can be used to change people's attitudes and behaviors with respect to personal safety. In this paper, we aim at advancing the investigation in different directions. First, we extend the study to self-efficacy, which has been shown to be a predictor of future performance as well as an important factor for persuasion attempts which show negative consequences on people's health. Second, we increase the interactivity of the virtual experience, by designing and implementing a full serious game, in which the user can acquire knowledge about several aspects of her personal safety, and we investigate also effects of the virtual experience on user's knowledge. Third, we focus on an important problem to which serious games and persuasive technology have never been applied before, i.e. educating passengers about personal safety in aircraft evacuations. The experiment presented in the paper shows how just playing the serious game for a few minutes results in significant increases in user's knowledge and self-efficacy. © 2012 Springer-Verlag.

关键词： Risk perception

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Effects of contextual navigation aids on browsing diverse web systems 00

Effects of contextual navigation aids on browsing diverse we...

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SIGCHI Conference on human Factors in Computing Systems, CHI 2000

作者： Park, Joonah Kim, Jinwoo Department of Cognitive Science Human Computer Interaction Lab Yonsei University Seoul 120-749 Korea Republic of

ISBN: (纸本)1581132166

In spite of the radical enhancement of web technologies, many users still continue to experience severe difficulties in navigating web systems. One way to reduce the navigation difficulties is to provide context information that explains the current situation of users in the web systems. In this study, we empirically examined the effects of two types of context information, namely, structural and temporal context. In the experiment, we evaluated the effectiveness of the contextual navigation aids in two different types of web systems: an electronic commerce system and a content dissemination system. In our experiment, subjects performed several browsing tasks and answered a set of post-questionnaires. The results of the experiment reveal that the two types of contextual navigation aids significantly improved the performance of browsing tasks regardless of different web systems. Moreover, context information changed the users' navigation patterns, and increased their subjective ease of navigation. This study concludes with implications for understanding the users' browsing patterns and for developing effective navigation systems. Copyright ACM 2000.

关键词： Surveys

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Changing user's safety locus of control through persuasive play: An application to aviation safety

Changing user's safety locus of control through persuasive p...

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9th International Conference on Persuasive Technology, PERSUASIVE 2014

作者： Chittaro, Luca Human-Computer Interaction Lab. University of Udine via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)9783319071268

Virtual risk experiences have been proposed in persuasive technology as an approach to change people's attitudes and behaviors concerning safety topics. This paper advances the investigation of virtual risk experiences in different directions. First, we extend the study of their effects to safety locus of control, which is an important predictor of an individual's attitudes and behaviors with respect to risky situations. Second, we explore a design that relies much more on play than previous virtual experiences of risks in the literature. Third, we extend the investigation of persuasive technology to a topic in aviation safety (i.e., assuming a proper brace position during an emergency landing) that has never been approached before with an interactive system and we analyze if a novel game-based approach can be effective in fostering awareness of this fundamental safety action. Our study shows that the proposed persuasive game produces noteworthy results in terms of learning safety knowledge and improves players' attitudes towards aircraft accidents, increasing their internal safety locus of control and decreasing the external one. © 2014 Springer International Publishing.

关键词： Aircraft accidents

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