Abstract
This paper presents a study on potential technology solutions for enhancing the communication process for deaf people on e-learning platforms through translation of Sign Language (SL). Considering SL in its global scope as a spatial-visual language not limited to gestures or hand/forearm movement, but also to other non-dexterity markers such as facial expressions, it is necessary to ascertain whether the existing technology solutions can be effective options for the SL integration on e-learning platforms. Thus, we aim to present a list of potential technology options for the recognition, translation and presentation of SL (and potential problems) through the analysis of assistive technologies, methods and techniques, and ultimately to contribute for the development of the state of the art and ensure digital inclusion of the deaf people in e-learning platforms. The analysis show that some interesting technology solutions are under research and development to be available for digital platforms in general, but yet some critical challenges must solved and an effective integration of these technologies in e-learning platforms in particular is still missing. (C) 2015 The Authors. Published by Elsevier B.V.

Abstract
The use of keyboard and mouse combinations to navigate 3D environments of virtual worlds requires the coordination of both hands in order for the 2D degrees of motion of the mouse to transform into the variety of motions available in a 3D space. Such coordination may pose a challenge to people with motor disabilities. 3D controllers known as "3D mice" are presented by manufacturers as significant interface alternatives. To establish the feasibility of such claims, the authors conducted a usability test of two 3D mice marketed by 3Dconnexion, in parallel with a keyboard + mouse test. The 10 participants had motor disabilities due to medullary lesions on vertebrae C5-D11 and performed 13 different tasks in the Second Life virtual world: 5 participants used 3D mice and 5 used keyboard + mouse. The main conclusion is that 2-3 of the 5 most challenging tasks in the keyboard + mouse combination become less challenging using 3D mice. Participants' feedback was more positive regarding 3D mice, but with significant differences between mice. Contrary to initial expectations of the authors, the least stable mouse, Space Navigator, produced the best feedback.

Abstract

Abstract
Este capítulo proporciona uma narrativa e reflexão sobre as dinâmicas de aprendizagem e contacto com o espaço físico no âmbito de um ano de participação do autor no jogo Ingress, da Google. Como jogo georreferenciado de realidade alternativa, recorre ao espaço físico que nos rodeia, mas reinterpretado com camadas de informação digital. Como jogo mundial de milhares de utilizadores simultâneos, reunidos em apenas duas equipas mundiais, requer coordenação de esforços, estratégias e colaboração. Como jogo que combina ficção científica com mistério, baseado numa narrativa incompleta que vai sendo revelada, combina dados implícitos, explícitos e ocultos, requerendo cruzamento de informações e perspetivas entre jogadores. Como jogo que é desenvolvido tecnicamente ao longo deste período, com alterações constantes de regras e funcionalidades, requer adaptação rápida às consequências e dinâmicas sociais. Pretende-se com esta narrativa e reflexão descortinar o potencial deste tipo de jogos para dinâmicas e atividades de aprendizagem formal ou informal.

Abstract
Apresentamos um conceito de jogo inovador e o seu protótipo inicial, integrando tipos distintos de interação e de visualização. Dois jogadores interagem como timoneiro de uma nau portuguesa e gigante Adamastor. Um joga em realidade virtual controlada por gestos finos, outro usa aumentação contextual com gestos amplos e fi-nos. Pretende o conceito e o protótipo servirem como exemplificadores das potencialidades das novas formas de interação e de como as concretizar.

Abstract
With the emergence of new low-cost gestural interaction devices various studies have been developed on multi-modal human-computer interaction to improve user experience. We present an exploratory study which analysed the user experience with a multimodal interaction game prototype. As a result, we propose a set of preliminary recommendations for combined use of such devices and present implications for advancing the multimodal field in human-computer interaction.