Navegando por Autor "Arantes, Dalton Soares"

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Analysis of user Interaction with a brain-computer interface based on steady-state visually evoked potentials : case study of a game.
(2018) Leite, Harlei Miguel de Arruda; Leite, Sarah Negreiros de Carvalho; Costa, Thiago Bulhões da Silva; Attux, Romis Ribeiro de Faissol; Hornung, Heiko Horst; Arantes, Dalton Soares
This paper presents a systematic analysis of a game controlled by a Brain-Computer Interface (BCI) based on Steady-State Visually Evoked Potentials (SSVEP).The objective is to understand BCI systems from the Human-Computer Interface (HCI) point of view, by observing how the users interact with the game and evaluating how the interface elements influence the system performance. The interactions of 30 volunteers with our computer game, named “Get Coins,” through a BCI based on SSVEP, have generated a database of brain signals and the corresponding responses to a questionnaire about various perceptual parameters, such as visual stimulation, acoustic feedback, background music, visual contrast, and visual fatigue. Each one of the volunteers played one match using the keyboard and four matches using the BCI, for comparison. In all matches using the BCI, the volunteers achieved the goals of the game. Eight of them achieved a perfect score in at least one of the four matches, showing the feasibility of the direct communication between the brain and the computer. Despite this successful experiment, adaptations and improvements should be implemented to make this innovative technology accessible to the end user.
Uso de vozes sintetizadas em ambientes virtuais de ensino a distância.
(2014) Leite, Harlei Miguel de Arruda; Cinto, Tiago; Leite, Sarah Negreiros de Carvalho; Peixoto, Cecilia Sosa Arias; Arantes, Dalton Soares
Com a evolução da tecnologia da informação, novas interfaces de comunicação homem-máquina passaram a ser desenvolvidas de forma muito eficiente. Uma área que passou por grandes modificações foi a de educação a distância. Antes restrita a correspondências, hoje ela dispõe de modernos ambientes virtuais de educação. Este trabalho busca avaliar um ambiente tridimensional de educação a distância que faz uso de sintetizadores de fala. Para tanto, metodologias de avaliação foram aplicadas para avaliar tanto o ambiente quanto a voz sintetizada, viabilizando o estudo da correlação entre a qualidade do ambiente e a qualidade da voz.
Virtual learning environments : proposals for authoring and visualization of educational content.
(2014) Cinto, Tiago; Leite, Harlei Miguel de Arruda; Peixoto, Cecilia Sosa Arias; Arantes, Dalton Soares
Heated debates involving reforms in the educational system are becoming more and more frequent in recent years. This is due to the increasingly evident shortcomings in the educational system and its difficulties to evolve at the same pace as technological development. The aim of this work is to present an analysis of the current engineering educational context and propose an interactive content authoring system as well as a virtual professor in an attempt to make learning experience richer and more motivating to students.