Avaliando o impacto da utilização de renderizações panorâmicas para a navegação em ambientes virtuais

Panoramic rendering is the visualization of three-dimensional objects in a virtual environment through a wide viewing angle. This work investigated if the use of panoramas is able to promote faster searches in a virtual environment. Panoramas allow the presentation of space through less need to change the orientation of the camera, especially for the case of projections spanning 360º surrounding the user, which can benefit searching. However, the larger the angle, more distorted is the visualization of the environment, causing confusion in navigation. The distortion is even bigger when the user changes the pitch of the camera, by looking up or down. In this work we developed a technique to eliminate specifically the distortions caused by changes in pitch, which was called hemispheric projection. Experiments were done to evaluate the performance of search navigation through perspective, cylindrical and hemispherical projections. The results indicate that navigating with perspective projection is superior than navigating with panoramic projections, possibly due to factors such as (i) lack of experience of the participants in understanding the scenes displayed as panoramas, (ii) the inherent presence of distortion in panoramic projections and (iii) a lower display resolution because the objects are presented in smaller sizes in panoramic projections, making the perception of details more difficult. However, the hemispherical projection was better than the cylindrical, indicating that the developed technique provides benefits for navigation compared to current techniques of panoramic projection. The hemispheric projection also provided the least amount of changes of camera orientation, which is an indication that the hemispheric projections may be particularly useful in situations where there are restrictions on the ease to change the orientation. Future research will investigate the performance of cameras interactions on slower devices, such as using only keyboard, or brain-machine interfaces

DIFFERENT MEDIA, DIFFERENT TYPES OF COLLECTIVE WORK IN ONLINE CONTINUING TEACHER EDUCATION: WOULD YOU PASS THE PEN, PLEASE?

This paper presents some findings regarding the interaction between different computer interfaces and different types of collective work. We want to claim that design in online learning environments has a paramount role in the type of collaboration that happens among participants. In this paper, we report on data that illustrate how teachers can collaborate online in order to learn how to use geometry software in teaching activities. A virtual environment which allows that construction to be carried out collectively, even if the participants are not sharing a classroom, is the setting for the research presented in this paper.

ARISupport - Interaction support for augmented reality systems

The communication between user and software is a basic stage in any Interaction System project. In interactive systems, this communication is established by the means of a graphical interface, whose objective is to supply a visual representation of the main entities and functions present in the Virtual Environment. New ways of interacting in computational systems have been minimizing the gap in the relationship between man and computer, and therefore enhancing its usability. The objective of this paper, therefore, is to present a proposal for a non-conventional user interface library called ARISupport, which supplies ARToolKit applications developers with an opportunity to create simple GUI interfaces, and provides some of the functionality used in Augmented Reality systems. © Springer-Verlag Berlin Heidelberg 2005.

Implementação de um ambiente computacional para ensino à distância

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Utilizando o software GeoGebra como recurso didático para o ensino do movimento oscilatório de pêndulos

Pós-graduação em Educação para a Ciência - FC

Atividades investigativas em grupos online: possibilidades para a educação matemática a distância

Pós-graduação em Educação Matemática - IGCE

Da leitura no impresso à leitura na tela: novas veredas para a formação do leitor na escola

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

O papel do mediador técnico-pedagógico na formação continuada a distância de professores em serviço

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

A formação continuada de professores do ensino superior para a atuação docente on-line: desafios e possibilidades

Pós-graduação em Educação - FCT

Tecnologias de informação e comunicação e o ambiente meseológico: um estudo do discurso tecnológico dos periódicos

Pós-graduação em Ciência da Informação - FFC

Crenças sobre a língua inglesa: o antiamericanismo e sua relação com o processo de ensino - aprendizagem de professores em formação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Mediação em fóruns educacionais de curso online de língua estrangeira (espanhol)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Base de dados online na disseminação sobre lazer de idosos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A vulnerabilidade no esporte e a exposição às novas mídias: um estudo sobre o twitter

Pós-graduação em Desenvolvimento Humano e Tecnologias - IBRC

A cultura e o ensino de língua estrangeira: perspectivas para a formação continuada no projeto Teletandem Brasil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)