Made available in DSpace on 2016-04-27T14:32:16Z (GMT). No. of bitstreams: 1 Tania Rossi Garbin.pdf: 2955516 bytes, checksum: 834cf24e07317a8e5a140f50a8afc893 (MD5) Previous issue date: 2008-06-04 / Children with cerebral palsy may be unable to perform oral or written communication and manipulate traditional computer data input devices (mouse and keyboard) due to motor problems. People with special needs must have an alternative environment with a simple autonomous interface. Augmented Reality environments can offer interactivity and multimedia information with real and virtual images, and promote alternative situations for real-time communication and cooperation. Thus, Augmented Reality becomes a kind of sensorial transductor which transforms ideas and concepts into visual and audio sensations which can be noticed and processed. The objective of this study is to propose an alternative form of communication for children with cerebral palsy using Augmented Reality systems, with basis on the complexity theory. Augmented Reality systems and assisted-communication software were used in this study in order to elaborate interaction and communication environments for five first-graders with cerebral palsy from a public elementary school. Our experiments show that the environments provided offered children the chance to perform academic activities both individually and collectively, interact with his/her teacher and peers in an alternative communication environment, making the perception of physical and chemical phenomena, sensations and mental construction easier. We found that the relationships established in alternative communication environments with augmented reality allow for the interaction and construction of action networks, resulting in dynamic and cooperative processes / Crianças com paralisia cerebral podem estar impossibilitadas de realizar a comunicação verbal, escrita e manipular os dispositivos tradicionais de entrada de dados em computador (teclado e mouse), por problemas motores. O portador de necessidades especiais precisa de um ambiente alternativo com interface simples para promover a comunicação e auxiliar o processo de aprendizagem autônoma. Os ambientes de Realidade Aumentada podem oferecer interatividade, informações multimídia com imagens reais e virtuais, promover situações alternativas para a comunicação, colaboração, com intervenções em tempo real. A Realidade Aumentada torna-se, então, uma espécie de transdutor sensorial que traduz idéias e conceitos para sensações visuais e auditivas que podem ser percebidas e processadas. Este estudo teve como objetivo propor uma forma alternativa de comunicação para crianças com paralisia cerebral utilizando sistemas de realidade aumentada e com base na teoria da complexidade. Para realização do estudo foram utilizados sistemas de Realidade Aumentada e software de comunicação assistida para elaboração de ambientes de interação e comunicação destinados a cinco crianças com paralisia cerebral da primeira série do ensino fundamental de escolas públicas. As experiências realizadas mostraram que os ambientes propostos ofereceram às crianças a possibilidade de realizar atividades escolares de forma individual e coletiva, interagir com o professor e colegas de classe funcionando como um ambiente de comunicação alternativo, facilitando a percepção o entendimento de fenômenos físicos, químicos, sensações e construções mentais. Verificamos que as relações estabelecidas nos ambientes de comunicação alternativos com realidade aumentada permitem a interação e a construção de redes de ações resultando em processos dinâmicos e colaborativos

Product visualization in AR/VR applications requires a largely manual process of data preparation. Previous publications focus on error-free triangulation or transformation of product structure data and display attributes for AR/VR applications. This paper focuses on the preparation of the required geometry data. In this context, a significant reduction in effort can be achieved through automation. The steps of geometry preparation are identified and examined concerning their automation potential. In addition, possible couplings of sub-steps are discussed. Based on these explanations, a structure for the geometry preparation process is proposed. With this structured preparation process, it becomes possible to consider the available computing power of the target platform during the geometry preparation. The number of objects to be rendered, the tessellation quality, and the level of detail (LOD) can be controlled by the automated choice of transformation parameters. Through this approach, tedious preparation tasks and iterative performance optimization can be avoided in the future, which also simplifies the integration of AR/VR applications into product development and use. A software tool is presented in which partial steps of the automatic preparation are already implemented. After an analysis of the product structure of a CAD file, the transformation is executed for each component. Functions implemented so far allow, for example, the selection of assemblies and parts based on filter options, the transformation of geometries in batch mode, the removal of certain details, and the creation of UV maps. Flexibility, transformation quality, and timesavings are described and discussed.