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- Blueeyes : easing the navigation and orientation of blind peoplePublication . Silva, Marta; Gomes, Anabela; Teixeira, Ana; Orvalho, JoaoAs reported by the World Health Organization (WHO), of the 7 billion people alive today, an estimated 253 million live with visual impairment that cannot be corrected with glasses or contact lenses. From these, 30 million blind or partially sighted persons live in Europe. Over the past years, blindness that is caused by diseases has decreased due to the success of public health actions. However, the number of blind people that are over 60 years old is increasing by 2 million per decade. Unfortunately, all these numbers are estimated to be doubled by 2020. With these facts, is necessary to bring awareness and understanding of the challenges blind people face and help to motivate research into new technology to answer those questions. This document starts to identify the challenges people with visual disabilities face in their life. The problem of navigation and orientation as well the different possibilities to deal with the locomotion situation is also addressed in this paper. It describes the traditional navigational solutions as well other which involves more sophisticated technological devices and their multimodal interfaces. The paper ends with the description of the BlueEyes project (Orvalho, 2016), consisting in a solution to help blind people moving in a city. The first phases of the project are described, and the actual research situations is also slightly explained.
- Middleware for embedded sensors and actuators in mobile pervasive augmented realityPublication . Ferreira, Pedro Miguel da Fonseca Marques; Orvalho, Joao; Boavida, Fernando
- Usability evaluation of playstation move motion controlerPublication . Teixeira, Ana; Assena, André; Santos, André; Moura, Mariana; Gomes, Nuno; Orvalho, JoaoThe several known studies of usability in videogames describe the elements contributing to the immersion and satisfaction in the videogame playing experience, as well as the importance of tests that secure the good performance of elements such as interface, graphics, sound, history, gameplay and replayability. This paper demonstrates an evaluation of the user´s interaction with the Playstation Move motion controller through usability tests. The goal is to understand the overall usability, the influence of environmental conditions and the use of two controllers simultaneously. This study will also contribute to the understanding of how important it is to use simultaneous but different methodologies, namely questionnaires, heuristic evaluations and direct observation of the users. It was concluded that different light conditions do not affect the use of the controllers, the accuracy and ergonomics are very good, but the button layout is not ideal. The controller´s calibration is time consuming but afterwards the acquisition is almost immediate.
- E-learning multimodal system for teaching and learning programmingPublication . Teixeira, Ana; Gomes, Anabela; Orvalho, JoaoThe high failure rates and abandonment are common in introductory programming courses in many higher education institutions worldwide. Different solutions have been proposed in literature trying to solve the problem but the situation remains virtually unchanged. Some members of this group also contributed with computer-based tools and different studies to understand and reduce this problem. Among the works carried out, the importance of investing in motivational aspects and the ability to solve problems is highlighted. This paper describes a new approach in order to contribute in solving this problem. The idea is to investigate the psychophysiological response of individuals during testing. The goal is to measure aspects of interest like the ability of abstraction, emotions, concentration, frustration, immersion, load/stress and cognitive level, in complex scenarios such as the resolution of programming problems. Thus, we intend to use new forms of interaction as Brain Computer Interfaces (BCI), eyetracking and other low-cost instruments (e.g.: BITalino) using body signals to extract information of interest. This information will be included in an e-learning system adapting its interface according to the users actions.
- Tutorial usefulness in videogame Wii consoles : fast learning of guidelines and game movementsPublication . Teixeira, Ana; Pereira, Sandra; Portela, Joana; Antunes, M.; Pereira, Rui; Silva, Hugo; Orvalho, JoaoOne of the key challenges of video game design is teaching new players how to play. Although game developers frequently use tutorials to teach game mechanics, little is known about how tutorials affect game learnability and player engagement. Seeking this problem, this paper intends to analyse the efficiency and usability of the Wii Sports tutorials and also the user s learning curve. The study was based upon heuristics, direct observation of the users and questionnaires, in order to evaluate all possible variables.
- Extension to CORBA event service for a conference control systemPublication . Orvalho, Joao; Andrade, Tiago; Boavida, Fernando
- Interação tátil: estudo de acessibilidade e usabilidade com cegosPublication . Simões, Marina; Monteiro, Ricardo; Valente, Tânia; Teixeira, Ana; Orvalho, JoaoA “interação baseada no toque” por utilizadores cegos em dispositivos móveis depreende um esforço cognitivo suplementar. Como objeto de análise, a partir de um conjunto de tarefas, o registo dos tempos e dos erros das práticas de interação e as observações dos utilizadores foi possível constatar a diferença na interação entre os sistemas operativos Android e iOS. Existem diferenças significativas entre estes dois sistemas, os resultados permitiram identificar qual a interface e as técnicas de interação mais acessíveis, assim como a obtenção de informação relevante para a conceção de produtos que correspondam às necessidades destes utilizadores.
- Pico, pico, saranico, quem te deu tamanho bico? : ampliar, no 1º CEB, o léxico a partir de textos tradicionaisPublication . Brites, Daniela Cristina Pereira; Orvalho, Joao; Pires, Natália Albino