Browsing by Author "Silva, D."
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- Cognition inspired format for the expression of computer vision metadataPublication . Castro, H.; Monteiro, J.; Pereira, A.; Silva, D.; Coelho, G.; Carvalho, P.Over the last decade noticeable progress has occurred in automated computer interpretation of visual information. Computers running artificial intelligence algorithms are growingly capable of extracting perceptual and semantic information from images, and registering it as metadata. There is also a growing body of manually produced image annotation data. All of this data is of great importance for scientific purposes as well as for commercial applications. Optimizing the usefulness of this, manually or automatically produced, information implies its precise and adequate expression at its different logical levels, making it easily accessible, manipulable and shareable. It also implies the development of associated manipulating tools. However, the expression and manipulation of computer vision results has received less attention than the actual extraction of such results. Hence, it has experienced a smaller advance. Existing metadata tools are poorly structured, in logical terms, as they intermix the declaration of visual detections with that of the observed entities, events and comprising context. This poor structuring renders such tools rigid, limited and cumbersome to use. Moreover, they are unprepared to deal with more advanced situations, such as the coherent expression of the information extracted from, or annotated onto, multi-view video resources. The work here presented comprises the specification of an advanced XML based syntax for the expression and processing of Computer Vision relevant metadata. This proposal takes inspiration from the natural cognition process for the adequate expression of the information, with a particular focus on scenarios of varying numbers of sensory devices, notably, multi-view video.
- Effects of single and combined exposures of gold (nano versus ionic form) and gemfibrozil in a liver organ culture of Sparus aurataPublication . Barreto, A.; Carvalho, A.; Silva, D.; Pinto, E.; Almeida, A.; Paíga, P.; Correia-Sá, L.; Delerue-Matos, C.; Trindade, T.; Soares, A.M.V.M.; Hylland, K.; Loureiro, S.; Oliveira, M.In vitro methods have gained rising importance in ecotoxicology due to ethical concerns. The aim of this study was to assess the single and combined in vitro effects of gold, as nanoparticle (AuNPs) and ionic (Au+) form, and the pharmaceutical gemfibrozil (GEM). Sparus aurata liver organ culture was exposed to gold (4 to 7200 μg·L−1), GEM (1.5 to 15,000 μg·L−1) and combination 80 μg·L−1 gold +150 μg·L−1 GEM for 24 h. Endpoints related with antioxidant status, peroxidative/genetic damage were assessed. AuNPs caused more effects than Au+, increasing catalase and glutathione reductase activities and damaging DNA and cellular membranes.
- Validation of app and phone versions of the Control of Allergic Rhinitis and Asthma Test (CARAT)Publication . Jácome, C.; Pereira, R.; Almeida, R.; Amaral, Rita; Correia, M. A.; Mendes, S.; Vieira-Marques, P.; Ferreira, J. A.; Lopes, I.; Gomes, J.; Vidal, C.; López Freire, S.; Méndez Brea, P.; Arrobas, A.; Valério, M.; Chaves Loureiro, C.; Santos, L. M.; Couto, M.; Araujo, L.; Todo Bom, A.; Azevedo, J. P.; Cardoso, J.; Emiliano, M.; Gerardo, R.; Lozoya, C.; Pinto, P. L.; Neves, A. Castro; Pinto, N.; Palhinha, A.; Teixeira, F.; Ferreira-Magalhães, M.; Alves, C.; Coelho, D.; Santos, N.; Menezes, F.; Gomes, R.; Rodrigues, J. C. Cidrais; Oliveira, G.; Carvalho, J.; Alves, R. Rodrigues; Moreira, A. S.; Costa, A.; Abreu, C.; Silva, R.; Morête, A.; Falcão, H.; Marques, M. L.; Câmara, R.; Cálix, M. J.; Bordalo, D.; Silva, D.; Vasconcelos, M. J.; Fernandes, R. M.; Ferreira, R.; Freitas, P.; Lopes, F.; Fonseca, J. AlmeidaAssessment of asthma control at every opportunity is recommended. Control of Allergic Rhinitis and Asthma Test (CARAT) is a patient reported outcome measure commonly used to assess asthma control in clinical practice.It includes ten questions answered in a 4 point Like rt scale that address upper and lower airway symptoms, sleep interference, limitation of activities , and the need to increase medication over a 4 week period. CARAT is frequently administered on paper during medical visits, but digital versions through website and mobile apps are available.