989 resultados para Arco Dental. Face. Maloclusão. Ortodontia. Morfologia
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Tese de Doutoramento, Biologia, Faculdade de Ciências do Mar e do Ambiente, Universidade do Algarve, 2001
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Dissertação de mestrado, Ciências da Educação e Formação, Faculdade de Ciências Humanas e Sociais, Universidade do Algarve, 2015
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Report of a research project of the Fachhochschule Hannover, University of Applied Sciences and Arts, Department of Information Technologies. Automatic face recognition increases the security standards at public places and border checkpoints. The picture inside the identification documents could widely differ from the face, that is scanned under random lighting conditions and for unknown poses. The paper describes an optimal combination of three key algorithms of object recognition, that are able to perform in real time. The camera scan is processed by a recurrent neural network, by a Eigenfaces (PCA) method and by a least squares matching algorithm. Several examples demonstrate the achieved robustness and high recognition rate.
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Relatório da Prática de Ensino Supervisionada, Mestrado em Ensino de Artes Visuais, Universidade de Lisboa, 2011
Disfuncionalidades do sistema jurídico criminal do Brasil em face do direito fundamental à segurança
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Tese de doutoramento, Direito (Ciências Jurídico-Políticas), Universidade de Lisboa, Faculdade de Direito, 2014
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Tese de doutoramento, Educação (História da Educação), Universidade de Lisboa, Instituto de Educação, 2014
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Investigations into the evolutionary origins of human cognition has shown that individuals’ memory for others is influenced by the latter’s behaviour in social contracts. Such research is primarily based on hypothetical or more abstract forms of social contracts, whereas an application of this knowledge to everyday health behaviours can be of great value. To address this, the current study investigated whether participants who were asked to imagine themselves in a hypothetical hazardous health scenario showed differential response sensitivity (d’) and latency (RT) to faces of hospital staff tagged with contrasting hand hygiene before touching patients: clean hands, dirty hands, or unknown hand-washing behaviour (control). The test used a two alternative forced-choice (2AFC: “old/new”) face recognition paradigm. The findings showed that d’ to dirty and clean hands was similar, but higher than for controls. Moreover, d’ was not affected by the occupation of hospital staff (nurses vs porters). The absence of memory gains towards clean or dirty hands points to the need for new strategies to remind patients to observe (and remember) the hand hygiene of others when exposed to hazardous health environments.
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Face recognition from images or video footage requires a certain level of recorded image quality. This paper derives acceptable bitrates (relating to levels of compression and consequently quality) of footage with human faces, using an industry implementation of the standard H.264/MPEG-4 AVC and the Closed-Circuit Television (CCTV) recording systems on London buses. The London buses application is utilized as a case study for setting up a methodology and implementing suitable data analysis for face recognition from recorded footage, which has been degraded by compression. The majority of CCTV recorders on buses use a proprietary format based on the H.264/MPEG-4 AVC video coding standard, exploiting both spatial and temporal redundancy. Low bitrates are favored in the CCTV industry for saving storage and transmission bandwidth, but they compromise the image usefulness of the recorded imagery. In this context, usefulness is determined by the presence of enough facial information remaining in the compressed image to allow a specialist to recognize a person. The investigation includes four steps: (1) Development of a video dataset representative of typical CCTV bus scenarios. (2) Selection and grouping of video scenes based on local (facial) and global (entire scene) content properties. (3) Psychophysical investigations to identify the key scenes, which are most affected by compression, using an industry implementation of H.264/MPEG-4 AVC. (4) Testing of CCTV recording systems on buses with the key scenes and further psychophysical investigations. The results showed a dependency upon scene content properties. Very dark scenes and scenes with high levels of spatial–temporal busyness were the most challenging to compress, requiring higher bitrates to maintain useful information.
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We present a method for recovering facial shape using an image of a face and a reference model. The zenith angle of the surface normal is recovered directly from the intensities of the image. The azimuth angle of the reference model is then combined with the calculated zenith angle in order to get a new field of surface normals. After integration of the needle map, the recovered surface has the effect of mapped facial features over the reference model. Experiments demonstrate that for the lambertian case, surface recovery is achieved with high accuracy. For non-Lambertian cases, experiments suggest potential for face recognition applications.
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O Programa Nacional de Avaliação Externa da Qualidade (PNAEQ), inserido no Departamento de Epidemiologia do Instituto Nacional de Saúde Doutor Ricardo Jorge, em Lisboa, tem implementado entre outros, o programa de Morfologia parasitária desde 1995. Neste programa são enviadas amostras de sangue e de fezes para identificação de parasitas e conta com o apoio de um grupo de trabalho cuja principal atividade é a seleção de amostras, a análise de resultados e elaboração de relatórios técnico-científicos promovendo a formação bem como a melhoria contínua do desempenho dos participantes. Neste estudo retrospetivo pretendemos avaliar, o desempenho dos participantes no período de 1995 a 2015, relativamente à deteção e identificação de parasitas, em amostras de fezes e sangue.
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Propõe-se, neste trabalho de investigação, explorar as disciplinas de Gestão de Reputação e de Gestão de Comunicação de Crise, de modo a enquadrar a reputação como um activo de valor, que protege uma organização quando esta enfrenta uma crise. O projecto de dissertação é dividido em duas partes. Uma revisão bibliográfica que constitui um campo teórico de base e um estudo de caso, sobre a crise financeira de 2008, que procura explorar o efeito da reputação num contexto real de crise. Este trabalho sugere, ao nível teórico, que a reputação pode funcionar como um escudo protector de uma organização, quando esta enfrenta uma crise, e suporta esta mesma ideia empiricamente, através da investigação realizada.
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Dissertação apresentada à Escola Superior de Comunicação Social para obtenção de grau de mestre em Publicidade e Marketing.
Citotoxicidade do ácido peracético: avaliação metabólica, estrutural e de morte em fibroblastos L929
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)