Papers by Luis M Encarnação
IEEE Computer Graphics and Applications, 2010
J im Thomas, a visionary scientist and inspirational leader, died on 6 August 2010 in Richland, W... more J im Thomas, a visionary scientist and inspirational leader, died on 6 August 2010 in Richland, Washington. His impact on the fi elds of computer graphics, user interface software, and visualization was extraordinary, his ability to personally change people's lives even more so. He is remembered for his enthusiasm, his mentorship, his generosity, and, most of all, his laughter. Jim's technical accomplishments are well summarized elsewhere. 1,2 This collection of remembrances images him through the eyes of his many friends and colleagues, who were asked to write a personal note about what Jim meant to them.
Studies in health technology and informatics, 2002
Collaborative virtual environments for diagnosis and treatment planning are increasingly gaining ... more Collaborative virtual environments for diagnosis and treatment planning are increasingly gaining importance in our global society. Virtual and Augmented Reality approaches promised to provide valuable means for the involved interactive data analysis, but the underlying technologies still create a cumbersome work environment that is inadequate for clinical employment. This paper addresses two of the shortcomings of such technology: Intuitive interaction with multi-dimensional data in immersive and semi-immersive environments as well as stereoscopic multi-user displays combining the advantages of Virtual and Augmented Reality technology.
Digitization of the Battlespace V and Battlefield Biomedical Technologies II, 2000
ABSTRACT
Visualization and Data Analysis 2003, 2003
... Peter Stephenson; Pedro Branco; Joachim Tesch; LM Encarnacao; David L. Zeltzer. PDF: Member: ... more ... Peter Stephenson; Pedro Branco; Joachim Tesch; LM Encarnacao; David L. Zeltzer. PDF: Member: $18.00, Non-member: $18.00 Hard Copy: Member: $24.00, Non-member: $24.00, Proceedings Vol. 5009. Visualization and Data Analysis 2003, Robert F. Erbacher; Philip C. Chen ...
Cockpit Displays VII: Displays for Defense Applications, 2000
ABSTRACT
Presence: Teleoperators and Virtual Environments, 2001
Oliver Bimber* [email protected] Fraunhofer Center for Research in Computer Graphics (CRCG), Inc. ... more Oliver Bimber* [email protected] Fraunhofer Center for Research in Computer Graphics (CRCG), Inc. 321 S. Main St. Providence, RI 02903, USA ... L. Miguel Encarnaçao [email protected] Fraunhofer Center for Research in Computer Graphics (CRCG), Inc. 321 S. ...
Theoretical Issues in Ergonomics Science, 2003
This article describes an emerging approach to the design of human-machine systems referred to as... more This article describes an emerging approach to the design of human-machine systems referred to as 'neuroadaptive interface technology'. A neuroadaptive interface is an ensemble of computer-based displays and controls whose functional characteristics change in response to meaningful variations in the user's cognitive and/or emotional states. Variations in these states are indexed by corresponding central nervous system activity, which control functionally adaptive modifications to the interface. The purpose of these modifications is to promote safer and more effective human-machine system performance. While fully functional adaptive interfaces of this type do not currently exist, there are promising steps being taken toward their development, and great potential value in doing so-value that corresponds directly to and benefits from a neuroergonomic approach to systems development. Specifically, it is argued that the development of these systems will greatly enhance overall human-machine system performance by providing more symmetrical communications between users and computerbased systems than currently exist. Furthermore, their development will promote a greater understanding of the relationship between nervous system activity and human behaviour (specifically work-related behaviour), and as such may serve as an exemplary paradigm for neuroergonomics. A number of current research and development areas related to neuroadaptive interface design are discussed, and challenges associated with the development of this technology are described.
Proceedings of the 1st International Conference on Computer Graphics and Interactive Techniques in Australasia and South East Asia, GRAPHITE '03, 2003
CHI '05 extended abstracts on Human factors in computing systems - CHI '05, 2005
Abstract The study of users' emotional behavior in the Human-Computer Intera... more Abstract The study of users' emotional behavior in the Human-Computer Interaction (HCI) field has received increasing attention during the last few years. Our work in this area focuses on the relationship between user emotions and perceived usability problems. Specifically, ...
Intelligent User Interfaces capture the users' behavior throughout the human-computer dialog... more Intelligent User Interfaces capture the users' behavior throughout the human-computer dialogue providing appropriate user support in the form of guidance, help, or interface adaptation. Along these lines and drawing from approaches in the emerging area of ...
Computers & Graphics, 2001
The rapid advances in computing and communications are dramatically changing all aspects of our l... more The rapid advances in computing and communications are dramatically changing all aspects of our lives. In particular, sophisticated 3D visualization, display, and interaction technologies are being used to complement our familiar physical world with computer-generated augmentations. These new interaction and display techniques are expected to make our work, learning, and leisure environments vastly more efficient and appealing.
IEEE Computer Graphics and Applications, 2000
Today, VR research and development efforts often focus on the continual innovation of interaction... more Today, VR research and development efforts often focus on the continual innovation of interaction styles and metaphors for virtual environments (VEs). New tools and interaction devices aim to increase the immersive experience rather than support seamless integration with real work scenarios. Even though users may soon perceive odours within VEs, real, task-oriented interaction within these environments will continue to lag behind. Combining these efforts can result in new user interfaces that reduce the cumbersome barriers prevalent in VEs today, finally unleashing the latent impact of this technology in everyday life. Implementing this vision requires an interdisciplinary and applied approach to integrate VR into the workplace. Mixed-reality display capabilities, useful multimodal interaction and perceptual, intuitive interfaces are major components of such an application-oriented and human-centered approach, for which we coined the term walk-up VR. The paper discusses augmented and virtual reality as contributing technologies
Computers & …, 2003
ABSTRACT We present a quadtree-based selective refinement algorithm for real-time, view-dependent... more ABSTRACT We present a quadtree-based selective refinement algorithm for real-time, view-dependent image warping used to present images with mirror displays that require a non-linear predistortion. The algorithm applies two-pass rendering, and recursively generates and selectively refines the underlying image grid with locally adapted levels of detail. Each discrete level of detail is determined by computing and evaluating the displacement error on the image plane within the image space of the mirror optics. The algorithm generates and refines only those image portions that contain visible information by considering an oriented convex container of the rendered scene. While display specific details of the algorithm are explained based on the more complex case of a particular mirror display, the Virtual Showcase its general functionality is valid for other non-linear displays.
This paper presents the modular training system MTS, the PLATINUM-Net, a worldwide network for in... more This paper presents the modular training system MTS, the PLATINUM-Net, a worldwide network for innovative learning and advanced training, and distributed collaborative training on demand as well aws cross-media delivery of course materials as demanding application ...
CHI'06 extended …, 2006
... Reducing User Frustration Abstract Nada Jaksic Department of Computer Science and Statistics ... more ... Reducing User Frustration Abstract Nada Jaksic Department of Computer Science and Statistics University of Rhode Island Kingston, RI 02881 USA [email protected] Pedro Branco IMEDIA 400 Westminster St. Providence, RI 02903 USA [email protected] ...
Computers & graphics, 1996
Today's software systems for medical visualization still suffer from a shortage of practical appl... more Today's software systems for medical visualization still suffer from a shortage of practical applications due to their lack of usability with respect to a large variety of users with different computer-skills and experiences. Furthermore, progress is often hampered by the lack of adequate software tools that allow research ideas to be rapidly accomplished, evaluated, and brought into routine. We developed an integrated software environment that is distinct because it, on the one hand, provides an application-builder toolbox for medical diagnosis and therapy. And, on the other hand, it allows for the development, integration, and user-centered evaluation of existing and new interaction techniques in 2-D, 3-D, and Virtual Reality (VR). The environment's interaction support is based on communicating application objects that employ a sophisticated message-based inter-object communication. In addition, the system contains a component for user-adapted interaction and system support. The system has been used for several clinical applications which are briefly described at the end of this paper.
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Papers by Luis M Encarnação