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检索条件"主题词=Human-centered computing"

共 2020 条记录，以下是1841-1850 订阅

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Managing Chronic Conditions with a Smartphone-based Conversational Virtual Agent 18

Managing Chronic Conditions with a Smartphone-based Conversa...

引用

18th ACM International Conference on Intelligent Virtual Agents (IVA)

作者： Bickmore, Timothy W. Kimani, Everlyne Ha Trinh Pusateri, Alexandra Paasche-Orlow, Michael K. Magnani, Jared W. Northeastern Univ Boston MA 02115 USA Univ Pittsburgh Med Ctr Pittsburgh PA USA Boston Med Ctr Boston MA USA

ISBN: (纸本)9781450360135

When deployed on mobile devices, virtual agents have the potential to deliver advice regarding medical conditions, as well as provide a ubiquitous channel for health education and behavior change for a variety of chronic health conditions. We describe design guidelines for mobile agent dialogues to support chronic disease management, a general-purpose smartphone-based architecture for a conversational virtual agent that simulates face-to-face health counseling conversations with patients, and an initial agent implementation that provides counseling to patients with the chronic heart condition atrial fibrillation in conjunction with a mobile heart rhythm monitor that is attached to the back of the phone. Preliminary results from a randomized trial with 120 patients with atrial fibrillation indicate that the agent results in significant improvements in self-reported quality of life relative to a standard of care control group.

关键词： Health human-centered computing Mobile Applications Natural language interfaces

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Walking-in-Place for VR Navigation Independent of Gaze Direction Using a Waist-Worn Inertial Measurement Unit 17

Walking-in-Place for VR Navigation Independent of Gaze Direc...

引用

17th IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Park, Chanho Jang, Kyungho Lee, Junsuk Elect & Telecommun Res Inst Daejeon South Korea

ISBN: (纸本)9781538675922

Many techniques have been proposed for navigation using head-mounted-displays (HMDs) in virtual reality (VR). A walking-inplace (WIP) interface for virtual locomotion provides a high presence and an immersive experience in a virtual environment (VE). However, most of the WIP techniques can only navigate users in the direction of their gaze. Other WIP methods considering virtual locomotion direction have complex configurations or are only feasible when the tracking spaces are not limited. This paper proposes a WIP interface independent of gaze direction based on the data analysis of waist-mounted inertial sensors. Our method can navigate in the locomotion direction by calculating the orientation of the pelvis. We experimentally compared two WIP methods using a navigation task that required participants to periodically observe the surrounding VE: (1) Conventional WIP (gaze-based direction) (2) Proposed WIP (pelvis-based direction). While there was no difference in learnability or cybersickness between the two methods, the proposed method had shorter task time and higher efficiency.

关键词： computing methodologies Computer graphics Graphics systems and interfaces Virtual reality human-centered computing human computer interaction (HCI) Interaction techniques

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Segue: Overviewing Evolution Patterns of Egocentric Networks by Interactive Construction of Spatial Layouts 13

Segue: Overviewing Evolution Patterns of Egocentric Networks...

引用

13th IEEE Conference on Visual Analytics Science and Technology (VAST)

作者： Law, Po-Ming Wu, Yanhong Basole, Rahul C. Georgia Inst Technol Atlanta GA 30332 USA Visa Res Palo Alto CA USA

ISBN: (纸本)9781538668610

Getting the overall picture of how a large number of ego-networks evolve is a common yet challenging task. Existing techniques often require analysts to inspect the evolution patterns of ego-networks one after another. In this study, we explore an approach that allows analysts to interactively create spatial layouts in which each dot is a dynamic ego-network. These spatial layouts provide overviews of the evolution patterns of ego-networks, thereby revealing different global patterns such as trends, clusters and outliers in evolution patterns. To let analysts interactively construct interpretable spatial layouts, we propose a data transformation pipeline, with which analysts can adjust the spatial layouts and convert dynamic ego-networks into event sequences to aid interpretations of the spatial positions. Based on this transformation pipeline, we develop Segue, a visual analysis system that supports thorough exploration of the evolution patterns of ego-networks. Through two usage scenarios, we demonstrate how analysts can gain insights into the overall evolution patterns of a large collection of ego-networks by interactively creating different spatial layouts.

关键词： human-centered computing Visualization Visualization techniques Graph drawings

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BC Tree-based Proxy Graphs for Visualization of Big Graphs 11

BC Tree-based Proxy Graphs for Visualization of Big Graphs

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IEEE Pacific Visualization Symposium (IEEE PacificVis)

作者： Hong, Seok-Hee Quan Nguyen Meidiana, Amyra Li, Jiaxi Eades, Peter Univ Sydney Sch IT Sydney NSW Australia

ISBN: (纸本)9781538614242

Recent work for visualizing big graphs uses a proxy graph approach: the original graph is replaced by a proxy graph, which is much smaller than the original graph. The challenge for the proxy graph approach is to ensure that the proxy graph is a good representation of the original graph. However, previous work to compute proxy graphs using graph sampling techniques often fails to preserve connectivity and important global skeletal structure in the original graph. This paper introduces two new families of proxy graph methods BCP-W and BCP-E, tightly integrating graph sampling methods with the BC (Block Cut-vertex) tree, which represents the decomposition of a graph into biconnected components. Experimental results using graph sampling quality metrics show that our new BC tree-based proxy graph methods produce significantly better results than existing sampling-based proxy graph methods: 25% improvement by BCP-W and 15% by BCP-E on average. We also present DBCP, a BC tree-based proxy graph method for distributed environment. Experiments on the Amazon Cloud EC2 demonstrate that DBCP is scalable for big graph data sets;runtime speed-up of 77% for distributed 5-server on average. Visual comparison using a graph layout method and the proxy quality metrics confirm that our new BC tree-based proxy graph methods are significantly better than existing sampling-based proxy graph method. Our main results lead to guidelines for computing sampling-based proxy graphs for visualization of big graphs.

关键词： human-centered computing Visualization Visualization techniques

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Deep Localization on Panoramic Images 25

Deep Localization on Panoramic Images

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Hanasaki, Atsutoshi Uchiyama, Hideaki Shimada, Atsushi Taniguchi, Rin-ichiro Kyushu Univ Fukuoka Japan

ISBN: (纸本)9781538633656

Sensor pose estimation is an essential technology for various applications. For instance, it can be used not only to display immersive contents according user movements in Virtual Reality (VR) and but also to superimpose computer-generated objects onto images from a camera in Augmented Reality (AR). As a technical term definition, camera localization with respect to a pre-created map database is specifically referred to as image based localization, memory based localization, or camera relocalization.

关键词： human-centered computing human computer interaction(HCI) Interaction paradigms Mixed/augmented reality

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Water Flow Measurement Technology Assessing Spatial User Interaction in an Underwater Immersive Virtual Reality Environment 25

Water Flow Measurement Technology Assessing Spatial User Int...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Yamashita, Shogo Suwa, Shunichi Miyaki, Takashi Rekimoto, Jun Univ Tokyo Tokyo Japan Univ Tokyo Sony Comp Sci Labs Tokyo Japan

ISBN: (纸本)9781538633656

Underwater immersive virtual reality (VR) environments can reproduce unique VR experiences such as swimming in the sea with beautiful coral reefs and a cage surrounded by sharks. Underwater VR poses new technical challenges to creating user interactions because water and the surround-screen make existing methods for realizing user interaction irrelevant. In this research, we present a potential water flow measurement technology aimed at accessing human-computer interaction in underwater VR. Flow measurement can be realized by using tracer particles that are scattered in fluids. However, existing tracer particles are not suitable for underwater immersive VR because the particles stop users from viewing the content on the screen. Therefore, we propose transparent tracer particles that become invisible in water and polarization-based technologies that enable cameras to track the movement of particles. This technology enables virtual objects in VR to react with the actual movement of water and haptic feedback by creating water flow in the swimming pool. These additions would enhance the illusion of immersion in underwater VR.

关键词： human-centered computing Interface design prototyping human-centered computing Virtual reality

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Performance-Driven Dance Motion Control of a Virtual Partner Character 25

Performance-Driven Dance Motion Control of a Virtual Partner...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Mousas, Christos Southern Illinois Univ Graph & Entertainment Technol Lab Carbondale IL 62901 USA

ISBN: (纸本)9781538633656

Taking advantage of motion capture and display technologies, a method giving a user the ability to control the dance motions of a virtual partner in an immersive setup was developed and is presented in this paper. The method utilizes a dance motion dataset containing the motion of both dancers (leader and partner). A hidden Markov model (HMM) was used to learn the structure of the dance motions. The HMM was trained on the motion of a chosen dancer (leader or partner), and during runtime, the system predicts the progress of the chosen dance motion, which corresponds to the progress of the user's motion. The regular structure of the HMM was extended by utilizing a jump state transition, allowing the user to improvise dance motions during the runtime. Since the jump state addition increases the model's complexity, an effort was made to optimize the prediction process to ensure runtime efficiency. A few corrective steps were also implemented to ensure the partner character's motions appear natural. A user study was conducted to understand the naturalness of the synthesized motion as well as the control that the user has on the partner character's synthesized motion.

关键词： human-centered computing Interaction paradigms Virtual reality computing methodologies Computer graphics Graphics systems and interfaces Virtual reality computing methodologies Computer graphics Animation Motion capture

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Multisensory Virtual Reality Exposure Therapy 25

Multisensory Virtual Reality Exposure Therapy

引用

25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Marquardt, Alexander Trepkowski, Christina Maiero, Jens Kruijff, Ernst Hinkenjann, Andre Bonn Rhein Sieg Univ Appl Sci Inst Visual Comp St Augustin Germany

In this research demo, we show different examples for the integration of multisensory cues to enhance user engagement and trigger emotional responses in immersive environments. Our primary focus is to use this modular... 详细信息

ISBN: (纸本)9781538633656

关键词： human-centered computing Multisensory Cues Virtual Reality Therapy Treatment 3D User Interfaces

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How to Evaluate an Evaluation Study? Comparing and Contrasting Practices in Vis with Those of Other Disciplines 7

How to Evaluate an Evaluation Study? Comparing and Contrasti...

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7th IEEE Biennial Workshop on Conference on Evaluation and Beyond - Methodological Approaches for Visualization (BELIV)

作者： Crisan, Anamaria Elliott, Madison Univ British Columbia Dept Comp Sci Vancouver BC Canada Univ British Columbia Dept Psychol Vancouver BC Canada

ISBN: (纸本)9781538668849

Evaluative practices within vis research are not routinely compared to those of psychology, sociology, or other areas of empirical study, leaving vis vulnerable to the replicability crisis that has embroiled scientific research more generally. In this position paper, we compare contemporary vis evaluative practices against those in those other disciplines, and make concrete recommendations as to how vis evaluative practice can be improved through the use of quantitative, qualitative, and mixed research methods. We summarize our discussion and recommendations as a checklist, that we intend to be used a resource for vis researchers conducting evaluative studies, and for reviewers evaluating the merits of such studies.

关键词： human-centered computing Visualization Visualization design and evaluation methods

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From Taxonomy to Requirements: A Task Space Partitioning Approach 7

From Taxonomy to Requirements: A Task Space Partitioning App...

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7th IEEE Biennial Workshop on Conference on Evaluation and Beyond - Methodological Approaches for Visualization (BELIV)

作者： Elshehaly, Mai Alvarado, Natasha McVey, Lynn Randell, Rebecca Mamas, Mamas Ruddle, Roy A. Univ Leeds Sch Comp Leeds W Yorkshire England Univ Leeds Sch Healthcare Leeds W Yorkshire England Keele Univ Keele Cardiovasc Res Grp Stoke On Trent Staffs England

ISBN: (纸本)9781538668849

We present a taxonomy-driven approach to requirements specification in a large-scale project setting, drawing on our work to develop visualization dashboards for improving the quality of healthcare. Our aim is to overcome some of the limitations of the qualitative methods that are typically used for requirements analysis. When applied alone, methods like interviews fall short in identifying the full set of functionalities that a visualization system should support. We present a five-stage pipeline to structure user task elicitation and analysis around well-established taxonomic dimensions, and make the following contributions: (i) criteria for selecting dimensions from the large body of task taxonomies in the literature,, (ii) use of three particular dimensions (granularity, type cardinality and target) to create materials for a requirements analysis workshop with domain experts, (iii) a method for characterizing the task space that was produced by the experts in the workshop, (iv) a decision tree that partitions that space and maps it to visualization design alternatives, and (v) validating our approach by testing the decision tree against new tasks that collected through interviews with further domain experts.

关键词： human-centered computing Visualization Visualization design and evaluation methods

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