Luis Carlos da Silva Bruno
@ipbeja.pt
Engeneering / ESTIG
Instituto Politécnico de Beja
Luís Carlos Bruno has been professor at the Polytechnic Institute of Beja (IPBeja) since 1997, currently as assistant professor, where teaches undergraduate and masters courses in the area of computer science. He is currently coordinator of the Information Systems and Interactivity Laboratory (LabSI2) and board member of the IPBeja Knowledge Transfer Center. He has participated in several research projects as invited researcher at INESC-ID (Lisbon) in the Visualization and Intelligent Multimodal Interfaces (VIMMI) group.
The main scientific interests are focused on the following areas: multimodal interactive systems, navigation in virtual environments, gesture recognition and assistive technologies for active aging.
EDUCATION
PhD in Computer Science
RESEARCH INTERESTS
Human Computer Interaction
Gestural Interfaces
Digital Support Tools for Senior People
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Manuel Andre Martins and Luis Carlos Bruno
IEEE
Elsa Rodrigues and Luís Bruno
EDP Sciences
This work aims to raise awareness of environmental problems through interactive means, which, today, are much more appealing than the traditional ones to the academic community. To better inform community members of the importance of the 3Rs – Reduce, Reuse and Recycle, it was decided to develop an interactive 3D game, accessible through the Word Wide Web. This game includes 3 different activities which can be played in any order: solid waste recycling, saving water, and saving electricity. A small group of people evaluated the games; all participants were familiar with video games. It should be noted that the tests carried out focused only on the usability and interactivity of the game – the impact of the game at the 3Rs level – Reduce, Reuse and Recycle – has not been tested yet. The game makes the user more aware of the physical space where he moves (the school), showing his progress in real time. At the end of the game, the user is presented with the total time he took to finish his tasks and the total score achieved. In this way, the game becomes more interesting to the user.
Luís Bruno and Elsa Rodrigues
EDP Sciences
This paper describes the development study of a solution to promote the Eco-Schools program for a higher school (ESTIG). The solution should communicate the actions and results of the Eco-Schools program, raise awareness from school all members to environmental education and involve the school community to save resources and to make selective waste collection through their monitoring. This Web system is composed by a front-office and a back-office and was developed according to principles and techniques of the software engineering area. The front-office were validated through user tests with 23 participants. In general, for generic tasks participants found the system easy to use and it was efficient and effective. For a more complex tasks participants had more difficulties to use and the system didn’t present so efficient and effective. There is a space to improve this system in order to involve more school members to environmental protection and education extended to other schools.
Luís Bruno, Maurício Sousa, Alfredo Ferreira, João Madeiras Pereira, and Joaquim Jorge
Elsevier BV
Abstract Walking-in-place (WIP) is a locomotion technique that allows users to travel in virtual environments (VEs) without significantly changing their physical position on the floor. Hip-directed steering(HDS) is a novel physical technique for controlling direction changes in virtual travel using hip movements. We present an WIP-based navigation approach for controlling locomotion in VEs that combines the speed and direction in a scenario similar to a domestic setup in which people interact with a flat screen. Their physical motion data are captured by one depth camera properly aligned with the screen and oriented toward the user. We approach the characteristically noisy data generated by depth cameras via a user study to determine both the range of values and their robustness from the motion data associated with the joints relevant to WIP speed(knee, ankle and foot) and HDS (spine, hip and shoulder) to derive a reliable technique. Our WIP speed method is supported in a simple vocabulary of five different footstep types. Experimental results show that both the knee and hip provide the most robust data. We evaluated our techniques via usability tests exercising common locomotion tasks. The results show that users liked both the speed control and comfort afforded by our speed method. Regarding HDS, users reported that the angular-based method allowed them to travel faster and was both more controllable and easier to learn than the time-based method. Our work shows that a single depth camera can be used to combine locomotion and direction control in a simple and affordable setup.
Nelso P. C. Ventura and Luis Carlos Bruno
IEEE
This article describes the research of an innovative approach to innovative graphical password model that supports secure authentication in Web systems and wants to solve the shoulder spy problem. To this end, we developed a graphical password model based on two elements: a Web page image that the user has opened in the moment of its enrolment, and strokes drawn with dimensions, directions, and sequences of user choice's. In an exploratory study with participants to validate shoulder spies perceptions, it was found that are more difficult when a user is logging in using a graphical password, than when using an alphanumeric password. The model was designed iteratively and user-centered. To validate its safety and usability, they were made several tests with participants. In these studies, we tried to understand the degree of effectiveness and memorization provided by this password graphical model to users in Web authentication. The results showed that we got a usable and secure solution with potential to be used as an alternative to alphanumeric password, against the shoulder spy in Web authentication.
Luís Bruno, João Pereira, and Joaquim Jorge
Springer Berlin Heidelberg
Walking in Place (WIP) is an important locomotion technique used in virtual environments. This paper proposes a new approach to WIP, called Speed-Amplitude-Supported Walking-in-Place (SAS-WIP), which allows people, when walking along linear paths, to control their virtual speed based on footstep amplitude and speed metrics. We argue that our approach allows users to better control the virtual distance covered by the footsteps, achieve higher average speeds and experience less fatigue than when using state-of-the-art methods based on footstep frequency, called GUD-WIP.
Ricardo Jota, B. Araújo, Luís C. Bruno, J. Pereira and J. Jorge
IMMIView is an interactive system that relies on multiple modalities and multi-user interaction to support collaborative design review. It was designed to offer natural interaction in visualization setups such as large-scale displays, head mounted displays or TabletPC computers. To support architectural design, our system provides content creation and manipulation, 3D scene navigation and annotations. Users can interact with the system using laser pointers, speech commands, body gestures and mobile devices. In this paper, we describe how we design a system to answer architectural user requirements. In particular, our system takes advantage of multiple modalities to provide a natural interaction for design review. We also propose a new graphical user interface adapted to architectural user tasks, such as navigation or annotations. The interface relies on a novel stroke-based interaction supported by simple laser pointers as input devices for large-scale displays. Furthermore, input devices such as speech and body tracking allow IMMIView to support multiple users. Moreover, they allow each user to select different modalities according to their preference and modality adequacy for the user task. We present a multi-modal fusion system developed to support multi-modal commands on a collaborative, co-located, environment, i.e. with two or more users interacting at the same time, on the same system. The multi-modal fusion system listens to inputs from all the IMMIView modules in order to model user actions and issue commands. The multiple modalities are fused based on a simple rule-based sub-module developed in IMMIView and presented in this paper. User evaluation performed over IMMIView is presented. The results show that users feel comfortable with the system and suggest that users prefer the multi-modal approach to more conventional interactions, such as mouse and menus, for the architectural tasks presented.
Pedro Santos, André Stork, Thomas Gierlinger, Alain Pagani, Bruno Araújo, Ricardo Jota, Luis Bruno, Joaquim Jorge, Joao Madeiras Pereira, Martin Witzel,et al.
Springer Berlin Heidelberg
In this paper we present evaluation results of an innovative application designed to make collaborative design review in the architectural and automotive domain more effective. Within IMPROVE, a European research project in the area of advanced displays, we are combining high resolution multi-tile displays, TabletPCs and head-mounted displays with innovative 2D and 3D Interaction Paradigms to better support collaborative mobile mixed reality design reviews. Our research and development is motivated by application scenarios in the automotive domain involving FIAT Elasis from Naples, Italy and in the architectural domain involving Page/Park architects from Glasgow, Scotland. User evaluation took place at Glasgow (UK), Naples (ITA) and Darmstadt (GER), where we tested the integrated IMPROVE prototype application. The tests were conducted based on several heuristics such as ergonomics and psychomotorial factors and they were conducted based on guidelines recommended by ISO 9241 to verify whether the developed interfaces were suitable for the applications scenarios. Evaluation results show that there is a strong demand for more interactive design review systems, allowing users greater flexibility and greater choice of input and visualization modalities as well as their combination.
Pedro Santos, André Stork, Thomas Gierlinger, Alain Pagani, Bruno Araújo, Ricardo Jota, Luis Bruno, Joaquim Jorge, Joao Madeiras Pereira, Martin Witzel,et al.
Springer Berlin Heidelberg
In this paper we introduce an innovative application designed tomake collaborative design review in the architectural and automotive domainmore effective. For this purpose we present a system architecture whichcombines variety of visualization displays such as high resolution multitile displays, TabletPCs and head-mounted displays with innovative 2D and 3DInteraction Paradigms to better support collaborative mobile mixed realitydesign reviews. Our research and development is motivated by two usescenarios: automotive and architectural design review involving real users fromPage\\Park architects and FIAT Elasis. Our activities are supported by the EUIST project IMPROVE aimed at developing advanced display techniques,fostering activities in the areas of: optical see-through HMD development usingunique OLED technology, marker-less optical tracking, mixed reality rendering,image calibration for large tiled displays, collaborative tablet-based andprojection wall oriented interaction and stereoscopic video streaming for mobileusers. The paper gives an overview of the hardware and software developmentswithin IMPROVE and concludes with results from first user tests.
Pedro Santos, André Stork, Thomas Gierlinger, Alain Pagani, Bruno Araújo, Ricardo Jota, Luis Bruno, Joaquim Jorge, Joao Madeiras Pereira, Martin Witzel,et al.
Springer Berlin Heidelberg
In this paper we present evaluation results of an innovative application designed to make collaborative design review in the architectural and automotive domain more effective. Within IMPROVE, a European research project in the area of advanced displays, we are combining high resolution multi-tile displays, TabletPCs and head-mounted displays with innovative 2D and 3D Interaction Paradigms to better support collaborative mobile mixed reality design reviews. Our research and development is motivated by application scenarios in the automotive domain involving FIAT Elasis from Naples, Italy and in the architectural domain involving Page/Park architects from Glasgow, Scotland. User evaluation took place at Glasgow (UK), Naples (ITA) and Darmstadt (GER), where we tested the integrated IMPROVE prototype application. The tests were conducted based on several heuristics such as ergonomics and psychomotorial factors and they were conducted based on guidelines recommended by ISO 9241 to verify whether the developed interfaces were suitable for the applications scenarios. Evaluation results show that there is a strong demand for more interactive design review systems, allowing users greater flexibility and greater choice of input and visualization modalities as well as their combination.