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About

Luís Barbosa is a computer science teacher at the Engineering department of the University of Trás-os-Montes e Alto Douro, Portugal. He obtained his Ph.D. degree in Computer Science from the University of Trás-os-Montes e Alto Douro whose dissertation theme was “Teaching Support Information Systems The Case Study of the portal SIDE from UTAD”. His area of interest and research are mainly Information Systems, Multisensory Virtual Environments and Interaction and has participated in several related research projects.

Interest
Topics
Details

Details

  • Name

    Luis Barbosa
  • Cluster

    Computer Science
  • Role

    Affiliated Researcher
  • Since

    01st January 2014
Publications

2017

Context-aware HDR video distribution for mobile devices

Authors
Melo, M; Barbosa, L; Bessa, M; Debattista, K; Chalmers, A;

Publication
Multimedia Tools Appl.

Abstract
HDR video on mobile devices is in its infancy and there are no solutions yet that can achieve full HDR video reproduction due to computational power limitations. In this paper we present a novel and versatile solution that allows the delivery of HDR video on mobile devices by taking into account contextual information and retro-compatibility for devices that do not have the computational power to decode HDR video. The proposed solution also enables the remote transmission of HDR video to mobile devices in real-time. This context-aware HDR video distribution solution for mobile devices is evaluated and discussed by considering the impact of HDR videos over conventional low dynamic range videos on mobile devices as well as the challenge of playing HDR videos directly locally or remotely. © 2016 Springer Science+Business Media New York

2017

A Context-Aware Method for Authentically Simulating Outdoors Shadows for Mobile Augmented Reality

Authors
Barreira, J; Bessa, M; Barbosa, L; Magalhaes, L;

Publication
IEEE Transactions on Visualization and Computer Graphics

Abstract

2017

Multisensory virtual environment for firefighter training simulation: Study of the impact of haptic feedback on task execution

Authors
Barbosa, L; Monteiro, P; Pinto, M; Coelho, H; Melo, M; Bessa, M;

Publication
2017 24º Encontro Português de Computação Gráfica e Interação (EPCGI)

Abstract

2016

Adaptation and Validation of the Igroup Presence Questionnaire (IPQ) in a Portuguese Sample

Authors
Vasconcelos Raposo, J; Bessa, M; Melo, M; Barbosa, L; Rodrigues, R; Teixeira, CM; Cabral, L; Sousa, AA;

Publication
PRESENCE-TELEOPERATORS AND VIRTUAL ENVIRONMENTS

Abstract
The present study aims (a) to translate and adapt the Igroup Presence Questionnaire (IPQ) to the Portuguese context (semantic equivalence/ conceptual and content validity) and (b) to examine its psychometric properties (reliability and factorial validity). The sample consisted of 478 subjects (285 males and 193 females). The fidelity of the factors varied between 0.53 and 0.83. The confirmatory factor analysis results produced a 14-item version of IPQ-PT, accepting covariance between residual errors of some items of the instrument, as the best structural representation of the data analyzed. The CFA was conducted based on a three-variable model. The fit indexes obtained were X-2/df = 2.647, GFI = .948, CFI = .941, RSMEA = .059, and AIC = 254. These values demonstrate that the proposed Portuguese translation of the IPQ maintains its original validity, demonstrating it to be a robust questionnaire to measure the sense of presence in virtual reality studies. It is therefore recommended for use in presence research when using Portuguese samples.

2016

Does 3D 360 video enhance user's VR experience?: An Evaluation Study

Authors
Bessa, Maximino; Melo, Miguel; Narciso, David; Barbosa, Luis; Raposo, JoseVasconcelos;

Publication
Proceedings of the XVII International Conference on Human Computer Interaction, Interacción 2016, Salamanca, Spain, September 13 - 16, 2016

Abstract
Technology for virtual reality has evolved at a fast pace and so is its affordability. Equipment such as head-mounted displays are now available for the average consumer at reasonable prices and this potentiates the use of contents such as video 360 in a more natural way. The purpose of this study was to measure the sense of presence and cybersickness comparing subjects by gender while experiencing a virtual reality application composed by type of VIDEO (360 video and 3D 360 video) using an head-mounted display. A Portuguese version of the Igroup Presence Questionnaire (IPQ) was used together with the Simulator Sickness Questionnaire (SSQ). The results have revealed that there are no significant differences across 2D and 3D videos in the sense of presence or cybersickness. © 2016 ACM.

Supervised
thesis

2016

Sistema Integrado de Gestão da Atividade Docente

Author
Cláudio José Silva Pereira

Institution
UTAD

2016

Camada (interface) de interoperabilidade do Sistema de Informação de Apoio ao Ensino (SIDE)

Author
Fernando Manuel Fernandes Rodrigues

Institution
UTAD

2016

Plataforma Online do Dossier Pedagógico do Aluno na UTAD

Author
Pedro Miguel Cardoso Teixeira Faria Gonçalves

Institution
UTAD

2016

Papel de uma solução estandardizada de document output menagement adaptada à área de serviços financeiros

Author
Oleg Stanko

Institution
UTAD

2016

BOAS PRÁTICAS NA PROGRAMAÇÃO ORIENTADA A OBJETOS A ADOPTAR PELOS ALUNOS DE INFORMÁTICA DO ENSINO SUPERIOR

Author
Adelaide Isabel dos Santos Vieira Braga Sampaio

Institution
UTAD