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Pedro Branco

Bio: Pedro Branco is an academic researcher from University of Minho. The author has contributed to research in topics: Storytelling & Information visualization. The author has an hindex of 14, co-authored 70 publications receiving 701 citations.


Papers
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Journal ArticleDOI
TL;DR: A prototype of an optical extension for table-like rear-projection systems is described in this article, where a large, half-silvered mirror beam splitter is used as the optical combiner to unify a virtual and a real workbench.
Abstract: A prototype of an optical extension for table-like rear-projection systems is described. A large, half-silvered mirror beam splitter is used as the optical combiner to unify a virtual and a real workbench. The virtual workbench has been enabled to display computer graphics beyond its projection boundaries and to combine virtual environments with the adjacent real world. A variety of techniques are described and referred to that allow indirect interaction with virtual objects through the mirror. Furthermore, the optical distortion that is caused by the half-silvered mirror combiner is analyzed, and techniques are presented to compensate for this distortion.

157 citations

Journal ArticleDOI
TL;DR: A neuroadaptive interface as discussed by the authors 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.
Abstract: 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

65 citations

Proceedings ArticleDOI
02 Apr 2005
TL;DR: The results suggest that an increase of task difficulty is related to an increase in specific facial muscle activity, thus creating a baseline for future developments using camera-based monitoring of facial activities.
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, we propose to observe users' spontaneous facial expressions as a method to identify adverse-event occurrences at the user interface level.This paper reports on the results of an experiment designed to investigate the association between adverse-event occurrences during a word processing task and users' facial expressions monitored using electromyogram (EMG) sensor devices. The results suggest that an increase of task difficulty is related to an increase in specific facial muscle activity, thus creating a baseline for future developments using camera-based monitoring of facial activities.

52 citations

Journal ArticleDOI
01 Apr 2012
TL;DR: The results suggest that the tangible interface was capable of promoting a stronger and long-lasting involvement having a greater potential to engage children, therefore potentially promoting learning.
Abstract: In an effort to better understand the learning potential of a tangible interface, we conducted a comparison study between a tangible and a traditional graphical user interface for teaching preschoolers (In Portugal, children enter preschool at the age of three and they attend it till entering school, normally at the age of six) about good oral hygiene. The study was carried with two groups of children aged 4 to 5 years. Questionnaires to parents, children's drawings, and interviews were used for data collection and analysis and revealed important indicators about children's change of attitude, involvement, and preferences for the interfaces. The questionnaires showed a remarkable change of attitude toward tooth brushing in the children that interacted with the tangible interface; particularly children's motivation increased significantly. Children's drawings were used to assess their degree of involvement with the interfaces. The drawings from the children that interacted with the tangible interface were very complete and detailed suggesting that the children felt actively involved with the experience. The results suggest that the tangible interface was capable of promoting a stronger and long-lasting involvement having a greater potential to engage children, therefore potentially promoting learning. Evaluation through drawing seems to be a promising method to work with preliterate children; however, it is advisable to use it together with other methods.

37 citations

Journal ArticleDOI
TL;DR: It is concluded that the digital manipulative enables the performance of what is called embodied stage-narratives, promoting children’s imagination and creative thinking, as well as fostering early literacy skills and metalinguistic awareness.

34 citations


Cited by
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01 Jan 1982
Abstract: Introduction 1. Woman's Place in Man's Life Cycle 2. Images of Relationship 3. Concepts of Self and Morality 4. Crisis and Transition 5. Women's Rights and Women's Judgment 6. Visions of Maturity References Index of Study Participants General Index

7,539 citations

01 Jan 2016

1,572 citations