Browsing by Author "Cardoso, Jorge C. S."
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- Anatomias UrbanasPublication . Henriques, Sara; Cardoso, Jorge C. S.; Figueiredo, HelenaAnatomias Urbanas é uma instalação interactiva que explora a capacidade de apropriação de identidades de forma virtual. Utiliza sistemas que reconhecem a face e o movimento humano resultando na sobreposição de máscaras pré- definidas sobre a face do utilizador. A tela é o ponto central da instalação e assemelha-se a um espelho que reflecte o espaço real, o utilizador e as máscaras e é através desta que o utilizador tem a possibilidade de dialogar num espaço virtual. Os sistemas utilizados fazem uma análise em tempo real do movimento e da face do utilizador determinando qual a máscara a estar no lugar da cara do utilizador. Anatomias Urbanas convidam o utilizador a interagir através de acções mágicas e instantâneas e a apropriar-se das máscaras existentes, resultando numa abordagem lúdica devido ao seu inerente sentido de jogo.
- Assessing Feedback for Indirect Shared InteractionPublication . Cardoso, Jorge C. S.; José, RuiInteraction is a key element in turning public displays into a platform for social interaction, making them more engaging and valuable. However, interactive features are still rare in public displays, due to the lack of generalised abstractions for incorporating interactivity. In our work, we explore to what extent the concept of interaction widget, which was so successful on desktop computers, could also be used as an abstraction for remote, shared interaction with public displays. A particular challenge is presenting input feedback in this shared, multi-user, and indirect interaction setting. In this paper, we present a study on the feedback mechanisms of these widgets, to determine if users are able to understand the results of interactions in single and multi-user settings. We have evaluated three feedback mechanisms and the results indicate that the general mechanism provides an appropriate sense of what is happening and could in fact provide general awareness of the interaction alternatives and current status, even in multi-user scenarios.
- Comparison of Gesture, Gamepad, and Gaze-based Locomotion for VR WorldsPublication . Cardoso, Jorge C. S.In this paper we present a VR locomotion technique based on the Leap Motion device and compare it to other often-used locomotion techniques – gaze-directed locomotion and gamepad-based locomotion. We performed a user experiment to evaluate the three techniques based on their performance (time to complete the task), comfort (through the ISO 9241-9 assessment of comfort questionnaire), and simulation sickness (through the Simulation Sickness Questionnaire). Results indicate that the gamepad technique is both faster and more comfortable than either the Leap Motion-based or the gaze-directed techniques.
- Creating web-based interactive public display applications with the PuReWidgets toolkitPublication . Cardoso, Jorge C. S.; José, RuiInteraction is repeatedly pointed out as a key enabling element towards more engaging and valuable public displays. Still, most digital public displays today do not support any interactive features. We believe that this is mainly due to the lack of efficient and clear abstractions that developers can use to incorporate interactivity into their applications. In this demo we present PuReWidgets, a toolkit that developers can use in their public display applications to support the interaction process across multiple display systems, without considering the specifics of what interaction modality will be used on each particular display. PuReWidgets provides high-level widgets to application programmers, and allows users to interact via various interaction mechanisms, such as graphical user interfaces for mobile devices, QR codes, SMS, etc.
- Cubesic: um controlador para iTunes baseado no cubo de RubickPublication . Gradim, Rita; Cardoso, Jorge C. S.Neste artigo é desenvolvida a ideia de um interface cujo principal objectivo é servir como um meio de acesso ao iTunes, o Cubesic. É feita uma análise de projectos semelhantes ao Cubesic e de como este se diferencia deles. De seguida fazemos uma descrição detalhada do Cubesic, desde o seu conceito, funcionamento e implementação. Finalmente fazemos uma avaliação do Cubesic enquanto protótipo, que tipo de alterações podem ser feitas, e como o projecto se torna inovador dentro do campo de interfaces de reprodução de músicas.
- Design and implementation of a new run-time life-cycle for interactive public display applicationsPublication . Cardoso, Jorge C. S.; Perpétua, AlicePublic display systems are becoming increasingly complex. They are moving from passive closed systems to open interactive systems that are able to accommodate applications from several independent sources. This shift needs to be accompanied by a more flexible and powerful application management. In this paper, we propose a run-time life-cycle model for interactive public display applications that addresses several shortcomings of current display systems. Our model allows applications to load their resources before they are displayed, enables the system to quickly pause and resume applications, provides strategies for applications to transition and terminate gracefully by requesting additional time to finish the presentation of content, allows applications to save their state before being destroyed and gives applications the opportunity to request and relinquish display time. We have implemented our model as a Google Chrome extension that allows any computer with the Google Chrome browser to become a public display driver without further software. In this paper we present our model, implementation, and evaluation of the system.
- Design considerations for application selection and control in multi-user public displaysPublication . Taivan, Constantin; José, Rui; Silva, Bruno; Elhart, Ivan; Cardoso, Jorge C. S.Urban spaces are increasingly embedded with various types of public digital displays. Many of these displays can be subject to multi-user interactions and support a broad range of applications. A fundamental implication emerging from the interactive nature of those applications is that users should have access to appropriate selection and control techniques that would allow them to drive the way applications are shown and used in the respective environment. Such techniques should enable each user to reason and express intentions about the system behavior, while also dealing with concurrent requests from multiple users in a way that is fair and clear. In this study, we aim to inform the definition of novel techniques for application selection and control in pervasive display environments that can address the above challenges. Drawing inspiration from traditional GUI interaction concepts we developed and deployed a public display system that supports multiple applications and is able to receive explicit content presentation requests from multiple viewers. Based on the experiment observations and interviews with the participants, we reached a set of design considerations for future pervasive displays environments that are open to third party applications providers and allow the audience to influence content presentation.
- DiABlu: Digital art's bluetoothPublication . Cardoso, Jorge C. S.; Rodrigues, NunoDigital art installations can often gain from the capability of detecting the presence of people observing them. With this information, the artists can enhance the experience of who interacts with their work. While this detection can be made by means of web cameras or sensors, these systems are generally difficult to implement for people with a low knowledge of programming. We propose a system that uses bluetooth to do this detection and allows easy integration with applications often used by digital artists. The system also allows users to interact with the installation using their mobile devices. It's intended to be used in art installations by digital artists who wish to give their audience a new way to interact with their pieces.
- DiABlu: Digital Arts' BluetoothPublication . Cardoso, Jorge C. S.; Rodrigues, NunoAbstract: Digital art installations can often gain from the capability of detecting the presence of people observing them. With this information, the artists can enhance the experience of who interacts with their work. While this detection can be made by means of web cameras or sensors, these systems are generally difficult to implement for people with a low knowledge of programming. We propose a system that uses bluetooth to do this detection and allows easy integration with applications often used by digital artists. The system also allows users to interact with the installation using their mobile devices. It's intended to be used in art installations by digital artists who wish to give their audience a new way to interact with their pieces.
- Dimensions of Situatedness for Digital Public DisplaysPublication . José, Rui; Otero, Nuno; Cardoso, Jorge C. S.