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共 85 条记录，以下是21-30 订阅

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A virtual human architecture that integrates kinematic, physical and behavioral aspects to control H-Anim characters 05

A virtual human architecture that integrates kinematic, phys...

引用

10th International Conference on 3D Web Technology

作者： Ieronutti, Lucio Chittaro, Luca HCI Lab. Dept. of Math and Computer Science University of Udine via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)9781595930125

Virtual humans are being increasingly used in different domains. Virtual human modeling requires to consider aspects belonging to different levels of abstractions. For example, at lower levels, one has to consider aspects concerning the geometric definition of the virtual human model and appearance while, at higher levels, one should be able to define how the virtual human behaves into an environment. H-Anim, the standard for representing humanoids in X3D/VRML worlds, is mainly concerned with low-level modeling aspects. As a result, the developer has to face the problem of defining the virtual human behavior and translating it into lower levels (e.g. geometrical and kinematic aspects). In this paper, we propose VHA (Virtual Human Architecture), a software architecture that allows one to easily manage an interactive H-Anim virtual human into X3D/VRML worlds. The proposed solution allows the developer to focus mainly on high-level aspects of the modeling process, such as the definition of the virtual human behavior. Copyright © 2005 by the Association for Computing Machinery, Inc.

关键词： Virtual reality

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High-level visualization of users' navigation in virtual environments

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1st International Conference on Advanced Data Mining and Applications, ADMA 2005

作者： Ieronutti, Lucio Ranon, Roberto Chittaro, Luca HCI Lab. Dept. of Math and Computer Science University of Udine Via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)3540289437

This paper presents the current status of VU-Flow (Visualization of Users' Flow), a software tool that is able to automatically record usage data in Virtual Environments and provide a set of 2D and 3D visualizations that make it easy for an evaluator to visually detect peculiar users' behaviors and navigability problems. The paper focuses on novel functionalities we recently added to the tool. More specifically, the new version of VU-Flow includes: (i) the possibility of visualizing predominant flow directions for multiple users or multiple visiting sessions, (ii) a visualization aimed at highlighting traffic congestion problems in multi-user VEs, (iii) the possibility of visualizing a replay of users' visits together with audio and video recordings of actual users (e.g. gathered during lab.experiments), and (iv) the ability to derive, for each user, a list of quantitative data characterizing her behavior in the VE. © IFIP International Federation for Information Processing 2005.

关键词： User interfaces

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A user-adaptive and context-aware architecture for mobile and desktop training applications 08

A user-adaptive and context-aware architecture for mobile an...

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10th International Conference on Human-computer Interaction with Mobile Devices and Services, MobileHCI 2008

作者： Buttussi, Fabio HCI Lab. Dept. of Math and Computer Science University of Udine Via delle Scienze 206 33100 Udine Italy

Our research aims at proposing a user-adaptive and context-aware architecture for mobile and desktop training applications. Our main result to date in the Mobile HCI field is an adaptive wearable system for fitness tr... 详细信息

ISBN: (纸本)9781595939524

关键词： Design Experimentation

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Dynamic generation of personalized VRML content: A general approach and its application to 3D e-commerce 02

Dynamic generation of personalized VRML content: A general a...

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7th International Conference on 3D Web Technology, Web3D '02

作者： Chittaro, Luca Ranon, Roberto HCI Lab. Dept. of Math and Computer Science University of Udine via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)1581134681

The capability of (semi)automatically adapting the content, structure, and/or presentation of a Web site to address the interests and preferences of each individual user is more and more considered as a key factor to increase user satisfaction and building customer loyalty. However, while a large body of literature is availab.e about making traditional Web sites adaptive, it is surprising that no research effort has been yet devoted to the problem of adapting Web3D content and presentation. This paper focuses on this topic, proposing a general approach to build adaptive 3D Web sites, and illustrating a specific application of the approach to a 3D e-commerce case study. The architecture we propose, called AWE3D (Adaptive WEb 3D), is based on a combination of readily availab.e and platform-independent Web technologies so that it can be reproduced by interested readers. Copyright 2002 ACM.

关键词： Websites

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Bringing dynamic queries to mobile devices: A visual preference-based search tool for tourist decision support

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1st International Conference on Advanced Data Mining and Applications, ADMA 2005

作者： Burigat, Stefano Chittaro, Luca De Marco, Luca HCI Lab. Dept. of Math and Computer Science University of Udine Via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)3540289437

This paper discusses the design and development of a preference-based search tool (PBST) for tourists, operating on PDA devices. PBSTs are decision support systems that help users in finding the outcomes (e.g., multi-attribute products or services) that best satisfy their needs and preferences. Our tool is specifically aimed at filtering the amount of information about points of interest (POIs) in a geographic area, thus supporting users in the search of the most suitable solution to their needs (e.g., a hotel, a restaurant, a combination of POIs satisfying a set of constraints specified by the user). We focus on the design of an effective interface for the tool, by exploring the combination of dynamic queries to filter POIs on a map with a visualization of the degree of satisfaction of constraints set by the user. We also report the results of a usability test we carried out on the first prototype of the system. © IFIP International Federation for Information Processing 2005.

关键词： Cellular telephone systems

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H-Animator: A visual tool for modeling, reuse and sharing of X3D humanoid anima 06

H-Animator: A visual tool for modeling, reuse and sharing of...

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Web3D 2006: 11th International Conference on 3D Web Technology

作者： Buttussi, Fabio Chittaro, Luca Nadalutti, Daniele HCI Lab. Dept. of Math. and Computer Science University of Udine via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)1595933360

Humanoid animation is a complex task which usually requires particular skills and training. To simplify this process we propose a visual tool, called H-Animator, which aims to help animators (especially the novice ones) in modeling X3D animations for H-Anim humanoids. Besides easiness of use, achieved through intuitive metaphors and interaction styles, we aim at providing an architecture to facilitate the reuse and sharing of X3D content, allowing animators to build a wide archive of material to be reused. Copyright © 2006 by the Association for Computing Machinery, Inc.

关键词： Animation

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Computational model and the human perception of emotional body language (EBL)

Computational model and the human perception of emotional bo...

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23rd Convention of the Society for the Study of Artificial Intelligence and Simulation of Behaviour, AISB 2009

作者： Fridin, Marina Barliya, Avi Schechtman, Edna De Gelder, Beatrice Flash, Tamar Dept. of Computer Science and Applied Math. Weizmann Institute of Science Rehovot Israel Lab. of Cognitive and Affective Neuroscience Tilburg Univ. Netherlands Dept. of Industrial Engineering and Management Ben Gurion Univ. Beer Sheva Israel

ISBN: (纸本)1902956850

Emotions are undeniably a central component of human existence. In recent years, the importance of developing systems which incorporate emotions into human-computer interaction (HCI) has been widely acknowledged. However, research on emotion recognition has been dominated by studies of facial expression of emotion. In comparison, the study of EBL has received relatively little attention. Here we study the phenomena of EBL, specifically of static body postures expressing emotions, from two different perspectives. First, we have built a computational model for the recognition of four basic emotions which achieves a relatively high recognition rate (70 %). Secondly, to study perception of EBL, we examined what body parts attract the observer's attention during the perception of EBL. This is done by tracking eye movements of human subjects during the observation of static postures expressing emotions. Although invaluable information can be inferred from motion, this study will show that information about static body posture is rich enough for both automatic recognition and human perception. The present study contributes in an applicative way both to the development of automatic recognition systems of EBL and provides insight into the nature of human recognition of EBL.

关键词： Eye movements

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Efficient binary schemes for training heterogeneous sensor and actor networks

Efficient binary schemes for training heterogeneous sensor a...

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9th ACM International Symposium on Mobile Ad Hoc Networking and Computing, MobiHoc'08 - 1st ACM International Workshop on Heterogeneous Sensor and Actor Networks, HeterSanet 2008

作者： Barsi, F. Navarra, A. Pinotti, C.M. Lavault, C. Ravelomanana, V. Olariu, S. Bertossi, A.A. Dept. of Math and Comp. Science University of Perugia Italy Lab. d'Informatique de Paris-Nord University of Paris France Dept. of Computer Science Old Dominion University Norfolk United States Dept. of Computer Science University of Bologna Italy

ISBN: (纸本)9781605581132

Sensor networks are expected to evolve into long-lived, autonomous networked systems whose main mission is to provide in-situ users-called actors-with real-time information in support of specific goals supportive of their mission. The network is populated with a heterogeneous set of tiny sensors. The free sensors alternate between sleep and awake periods, under program control in response to computational and communication needs. The periodic sensors alternate between sleep periods and awake periods of predefined lengths, established at the fabrication time. The architectural model of an actor-centric network used in this work comprises in addition to the tiny sensors a set of mobile actors that organize and manage the sensors in their vicinity. We take the view that the sensors deployed are anonymous and unaware of their geographic location. Importantly, the sensors are not, a priori, organized into a network. It is, indeed, the interaction between the actors and the sensor population that organizes the sensors in a disk around each actor into a short-lived, mission-specific, network that exists for the purpose of serving the actor and that will be disbanded when the interaction terminates. The task of setting up this form of actor-centric network involves a training stage where the sensors acquire dynamic coordinates relative to the actor in their vicinity. The main contribution of this work is to propose an energy-efficient training protocol for actor-centric heterogeneous sensor networks. Our protocol outperforms all know training protocols in the number of sleep/awake transitions per sensor needed by the training process. Specifically, in the presence of k coronas, no sensor will experience more than log k sleep/awake transitions and awake periods. © 2008 ACM.

关键词： Sensor networks

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Modeling Web caching schemes for performance studies

Modeling Web caching schemes for performance studies

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International Conference on Parallel Processing (ICPP 2000)

作者： Chiang, CY Ueno, M Liu, MT Muller, ME Applied Research Telcordia Technologies United States Science and Technical Research Lab. Japan Broadcasting Corp. Japan Computer and Info. Science Dept. Ohio State University United States

ISBN: (纸本)0769507689

This paper(1) outlines a generic approach to modeling Web caching schemes. Four Web caching schemes -- SH, ICP, CD, mid CNP -- were modeled to study their performance in terms of request latencies. There were two important findings. First, conventional Web caching schemes such as SH, ICP, and CD would have shorter request latencies if total numbers of levels in their caching hierarchies were one or two. Second, under some reasonable assumptions, CNP was found to outperform the other schemes in terms of request latencies.

关键词： Broadcast technology Broadcasting Cache memory Delay Flowcharts Ice IP networks Network servers Protocols Web server

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Exploring user motivations for eyes-free interaction on mobile devices 12

Exploring user motivations for eyes-free interaction on mobi...

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30th ACM Conference on Human Factors in Computing Systems, CHI 2012

作者： Yi, Bo Cao, Xiang Fjeld, Morten Zhao, Shengdong Dept. of Computer Science National University of Singapore Singapore Microsoft Research Asia Beijing China T2i Lab. Dept. of Applied IT Chalmers University of Technology Sweden

ISBN: (纸本)9781450310154

While there is increasing interest in creating eyes-free interaction technologies, a solid analysis of why users need or desire eyes-free interaction has yet to be presented. To gain a better understanding of such user motivations, we conducted an exploratory study with four focus groups, and suggest a classification of motivations for eyes-free interaction under four categories (environmental, social, device features, and personal). Exploring and analyzing these categories, we present early insights pointing to design implications for future eyes-free interactions. Copyright 2012 ACM.

关键词： Motivation

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