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.

Abstract
Companies focus on software development in order to survive in a highly competitive world. They not only need to keep up to date with the changes that are occurring in their environment, but they also need to assure the effectiveness of their processes. One way to do that is pursuing high quality standards by continuously improving the development processes. In this chapter, the authors describe the project of CMMI (Capability Maturity Model Integration) implementation in a software company specialized in information technology services for banking. The project was initiated with the aim of optimizing the software development process. Throughout the chapter, various aspects of the project are covered, such as the actions taken to implement the CMMI maturity level 2, the tools used to support the implementation, and the obtained results. These are useful and could serve as a reference basis for companies that consider the implementation of a maturity model.