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3D video shot boundary detection based on clustering of depth-temporal features
Publication . Ferreira, Lino; Assunção, Pedro; Cruz, Luis A. da Silva
This paper proposes an algorithm for automatic detection of 3D video shots with different perceptual features. The proposed algorithm is able to identify distinct three-dimensional visual scenes by detecting 3D video shot boundaries based on clustering of depth-temporal features. A combination of texture variation along the temporal dimension and depth variance is used by K-means clustering to find the stereo frames which comprised the 3D scene boundaries. An important characteristic of the proposed algorithm in comparison with others published in the literature for temporal segmentation of classic 2D video is that no thresholds are used in the decision processes neither training data sets. The experimental results show that the proposed method is capable of achieving high recall (e.g., 0.95) and precision rate (e.g., 1.0) in video sequences with both sharp and smooth 3D scene transitions.
Video compression using 3D multiscale recurrent patterns
Publication . Francisco, Nelson C.; Rodrigues, Nuno M. M.; Silva, Eduardo A. B. da; Carvalho, Murilo B. de; Faria, Sergio M. M. de
In this paper, we propose a new 3D pattern matching based video compression algorithm. Spatiotemporal prediction tools are used to exploit both the temporal and the spatial redundancies, and the resulting residue is encoded using a 3D data coding extension of the Multidimensional Multiscale Parser (MMP) algorithm. MMP was originally proposed as a generic lossy data compression algorithm. A high degree of adaptivity and versatility allowed it to be competitive with state-of-the-art transform-based compression methods for a wide range of applications and data sets. The performance of the proposed algorithm is compared with that of H.264/AVC, achieving close results for some data sets, which indicates the potential of the pattern matching paradigm as an alternative to the traditional hybrid video codecs.
HUB AZUL | MODELO DE GOVERNANÇA - Estudo de caso Hub Azul Peniche - Smart Ocean -
Publication . Oliveira, Mariana Tavares Paupério de; Leandro, Sérgio Miguel Franco Martins; Fernandes , Maria Eduarda da Silva Teixeira
A presente dissertação de mestrado tem como objetivo analisar modelos de governança aplicados a ecossistemas de inovação colaborativa, com particular enfoque nas atividades do setor da economia azul. O tema é motivado pela relevância global da economia azul, e pelo papel, que ecossistemas inovadores, assumem na resposta à estratégia azul e aos desafios globais.
Procurou-se aprofundar o conhecimento sobre o estado de arte relativo a modelos de governança em contextos de inovação colaborativa, bem como a relevância que estruturas do tipo hub azul podem desempenhar no desenvolvimento regional.
A dissertação combina um enquadramento teórico e empírico, centrado nas dimensões, princípios e pilares, que sustentam modelos de governança, mobilizando conceitos como inovação e impacto.
Na secção final, apresenta-se um estudo de caso aplicado ao modelo de governança do Hub Azul Peniche - Smart Ocean, integrado na rede Hub Azul Portugal – Rede de Polos de Inovação e Infraestruturas para a Economia Azul em Portugal.
Os resultados permitem identificar os pilares, princípios e modelos de governança que podem ser aplicados em hubs azuis, contribuindo para a sua sustentabilidade a longo prazo, para o impacto positivo nos ecossistemas marinhos, e para o desenvolvimento regional sustentável, em consonância com a estratégia azul.
Effect of saline environment on mechanical properties of adhesive joints
Publication . Pereira, A. M.; Reis, P.N.B.; Ferreira, J.A.M.; Antunes, F.V.
Literature reports very few works about the effect of corrosive environments on the mechanical properties of adhesive joints. Therefore, the present study intends to contribute for a better understanding of the effect of saline solution on the mechanical properties of single-lap adhesive joints. The specimens were manufactured using Docol 1000 high strength steel plates with 1 mm of thickness and Araldite® 420 A/B epoxy adhesive. The static shear strength of the joints was influenced by the exposure time in saline solutions only up to 120 h, and remained, after this period, nearly constant. In terms of fatigue strength, for 105 cycles, a decrease about 25% and 39% occurred in specimens immersed during 120 h in deionised water and saline solution, respectively, comparatively to the control samples.
Sustainable production of biologically active molecules of marine based origin
Publication . Murray, Patrick M.; Moane, Siobhan; Collins, Catherine; Beletskaya, Tanya; Thomas, Olivier P.; Duarte, Alysson W.F.; Nobre, Fernando S.; Owoyemi, Ifeloju O.; Pagnocca, Fernando C.; Sette, L.D.; McHugh, Edward; Causse, Eric; Pérez-López, Paula; Feijoo, Gumersindo; Moreira, Ma.T.; Rubiolo, Juan; Leirós, Marta; Botana, Luis M.; Pinteus, Susete; Alves, Celso; Horta, André; Pedrosa, Rui; Jeffryes, Clayton; Agathos, Spiros N.; Allewaert, Celine; Verween, Annick; Vyverman, Wim; Laptev, Ivan; Sineoky, Sergei; Bisio, Angela; Manconi, Renata; Ledda, Fabio; Marchi, Mario; Pronzato, Roberto; Walsh, Daniel J.
The marine environment offers both economic and scientific potential which are relatively untapped from a biotechnological point of view. These environments whilst harsh are ironically fragile and dependent on a harmonious life form balance. Exploitation of natural resources by exhaustive wild harvesting has obvious negative environmental consequences. From a European industry perspective marine organisms are a largely underutilised resource. This is not due to lack of interest but due to a lack of choice the industry faces for cost competitive, sustainable and environmentally conscientious product alternatives. Knowledge of the biotechnological potential of marine organisms together with the development of sustainable systems for their cultivation, processing and utilisation are essential. In 2010, the European Commission recognised this need and funded a collaborative RTD/SME project under the Framework 7-Knowledge Based Bio-Economy (KBBE) Theme 2 Programme 'Sustainable culture of marine microorganisms, algae and/or invertebrates for high value added products'. The scope of that project entitled 'Sustainable Production of Biologically Active Molecules of Marine Based Origin' (BAMMBO) is outlined. Although the Union is a global leader in many technologies, it faces increasing competition from traditional rivals and emerging economies alike and must therefore improve its innovation performance. For this reason innovation is placed at the heart of a European Horizon 2020 Strategy wherein the challenge is to connect economic performance to eco performance. This article provides a synopsis of the research activities of the BAMMBO project as they fit within the wider scope of sustainable environmentally conscientious marine resource exploitation for high-value biomolecules.