2016
Autores
Lopes, DS; Mendes, D; Sousa, M; Jorge, J;
Publicação
COMPUTERS & GEOSCIENCES
Abstract
Too often illustrating and visualizing 3D geological concepts are performed by sketching in 2D mediums, which may limit drawing performance of initial concepts. Here, the potential of expeditious geological modeling brought by hand gestures is explored. A spatial interaction system was developed to enable rapid modeling, editing, and exploration of 3D layer-cake objects. User interactions are acquired with motion capture and touch screen technologies. Virtual immersion is guaranteed by using stereoscopic technology. The novelty consists of performing expeditious modeling of coarse geological features with only a limited set of hand gestures. Results from usability-studies show that the proposed system is more efficient when compared to a windows-icon-menu-pointer modeling application.
2016
Autores
Carvalheira, AMB; Moreira, A;
Publicação
Advances in Electronic Government, Digital Divide, and Regional Development - Handbook of Research on Entrepreneurial Success and its Impact on Regional Development
Abstract
2016
Autores
Cardoso, HL; Moreira, JM;
Publicação
IEEE 17th International Conference on Mobile Data Management, MDM 2016, Porto, Portugal, June 13-16, 2016 - Workshops
Abstract
2016
Autores
Lafuente, AL; Proença, J;
Publicação
COORDINATION
Abstract
2016
Autores
Silva, H; Almeida, JM; Lopes, F; Ribeiro, JP; Freitas, S; Amaral, G; Almeida, C; Martins, A; Silva, E;
Publicação
OCEANS 2016 MTS/IEEE MONTEREY
Abstract
This paper addresses the use of heterogeneous sensors for target detection and recognition in maritime environment. An Unmanned Aerial Vehicle payload was assembled using hyperspectral, infrared, electro-optical, AIS and INS information to collect synchronized sensor data with vessel ground-truth position for conducting air and sea trials. The data collected is used to develop automated robust methods for detect and recognize vessels based on their exogenous physical characteristics and their behaviour across time. Data Processing preliminary results are also presented.
2016
Autores
Martins, TJM; Marques, MB; Roy, P; Jamier, R; Fevrier, S; Frazao, O;
Publicação
SIXTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS
Abstract
Temperature-independent strain measurement is achieved resorting to a taper fabricated on a Bragg fibre using a CO2 laser. The characteristic bimodal interference of an untapered Bragg fibre is rendered multimode after taper fabrication and the resulting transmission spectra are analysed as temperature and strain change. The intrinsic strain sensitivity exhibited by the Bragg fibre is increased 15 fold after tapering and reaches 22.68 pm/mu epsilon. The difference in wavelength shift promoted by variations in temperature and strain for the two fringes studied is examined and strain sensing with little temperature sensitivity is achieved, presenting a sensitivity of 2.86 pm/mu epsilon, for strain values up to 400 mu epsilon.
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