8,358 research outputs found

    仮想観客インタフェースに会話活性度推定モデルを付与した場の盛り上がり支援システム

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    Previously, we developed an embodied virtual communication system (EVCOS) for human interaction analysis by synthesis, and confirmed the importance of embodied sharing in avatar-mediated communication. In this paper, we analyze human interaction and communication in interaction-activated conversation for supporting avatar-mediated communication by using EVCOS, and we propose a model for estimating conversational activity on the basis of this analysis. Further, we develop an interaction-activated communication support system for enhancing embodied interaction and communication by applying the proposed model to a virtual audience comprising interactive CG objects. In this system, the virtual audience generates entrained nodding responses as well as dynamic movements based on the estimated conversational activity during the interaction-activated communication period. The effectiveness of the system is demonstrated by means of sensory evaluations and behavioral analysis of 20 pairs of subjects involved in avatar-mediated communication

    Communicating emotions in expressive avatars

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    Avatars have become a fundamental part of collaborative virtual environments. They are the visual embodiment of the user and are designed to address key issues in the interaction process between the user and the CVE. Giving avatars expressive abilities has been considered essential in computer-human reaction. Having an avatar, which has the ability to express facial expressions, as a part of the computer interface increases human performance. Researches have provided strong evidence that emotions can be effectively portrayed visually in avatars to represent human users in collaborative virtual environments. These include manipulation of facial expressions as they are efficient carriers of emotions. However, avatars have still only limited variations in their emotional expressions to become believable entities

    Church Belles: An Interactive System and Composition Using Real-World Metaphors

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    This paper presents a brief review of current literature detailing some of the issues and trends in composition and performance with interactive music systems. Of particular interest is how musicians interact with a separate machine entity that exercises agency over the creative process. The use of real-world metaphors as a strategy for increasing audience engagement is also discussed. The composition and system Church Belles is presented, analyzed and evaluated in terms of its architecture, how it relates to existing studies of musician-machine creative interaction and how the use of a real-world metaphor can promote audience perceptions of liveness. This develops previous NIME work by offering a detailed case study of the development process of both a system and a piece for popular, non-improvisational vocal/guitar music. keywords: Interactive music systems, real-world, metaphor, physical model, popular musi

    Designing Embodied Interactive Software Agents for E-Learning: Principles, Components, and Roles

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    Embodied interactive software agents are complex autonomous, adaptive, and social software systems with a digital embodiment that enables them to act on and react to other entities (users, objects, and other agents) in their environment through bodily actions, which include the use of verbal and non-verbal communicative behaviors in face-to-face interactions with the user. These agents have been developed for various roles in different application domains, in which they perform tasks that have been assigned to them by their developers or delegated to them by their users or by other agents. In computer-assisted learning, embodied interactive pedagogical software agents have the general task to promote human learning by working with students (and other agents) in computer-based learning environments, among them e-learning platforms based on Internet technologies, such as the Virtual Linguistics Campus (www.linguistics-online.com). In these environments, pedagogical agents provide contextualized, qualified, personalized, and timely assistance, cooperation, instruction, motivation, and services for both individual learners and groups of learners. This thesis develops a comprehensive, multidisciplinary, and user-oriented view of the design of embodied interactive pedagogical software agents, which integrates theoretical and practical insights from various academic and other fields. The research intends to contribute to the scientific understanding of issues, methods, theories, and technologies that are involved in the design, implementation, and evaluation of embodied interactive software agents for different roles in e-learning and other areas. For developers, the thesis provides sixteen basic principles (Added Value, Perceptible Qualities, Balanced Design, Coherence, Consistency, Completeness, Comprehensibility, Individuality, Variability, Communicative Ability, Modularity, Teamwork, Participatory Design, Role Awareness, Cultural Awareness, and Relationship Building) plus a large number of specific guidelines for the design of embodied interactive software agents and their components. Furthermore, it offers critical reviews of theories, concepts, approaches, and technologies from different areas and disciplines that are relevant to agent design. Finally, it discusses three pedagogical agent roles (virtual native speaker, coach, and peer) in the scenario of the linguistic fieldwork classes on the Virtual Linguistics Campus and presents detailed considerations for the design of an agent for one of these roles (the virtual native speaker)

    Digital Human Representations for Health Behavior Change: A Structured Literature Review

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    Organizations have increasingly begun using digital human representations (DHRs), such as avatars and embodied agents, to deliver health behavior change interventions (BCIs) that target modifiable risk factors in the smoking, nutrition, alcohol overconsumption, and physical inactivity (SNAP) domain. We conducted a structured literature review of 60 papers from the computing, health, and psychology literatures to investigate how DHRs’ social design affects whether BCIs succeed. Specifically, we analyzed how differences in social cues that DHRs use affect user psychology and how this can support or hinder different intervention functions. Building on established frameworks from the human-computer interaction and BCI literatures, we structure extant knowledge that can guide efforts to design future DHR-delivered BCIs. We conclude that we need more field studies to better understand the temporal dynamics and the mid-term and long-term effects of DHR social design on user perception and intervention outcomes
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