Caracterização da pescaria do peixe-espada preto nos Açores de 2008 a 2012

Dissertação de Mestrado, Estudos Integrados dos Oceanos, 13 de Fevereiro de 2014, Universidade dos Açores.

Biologia e abundância do camarão Plesionika edwardsii (Brandt, 1851) nos Açores

Dissertação de Mestrado, Estudos Integrados dos Oceanos, 15 de Janeiro de 2009, Universidade dos Açores.

Driving Scheme Using MIS Photosensor for Luminance Control of AMOLED Pixel

This paper presents a new driving scheme utilizing an in-pixel metal-insulator-semiconductor (MIS) photosensor for luminance control of active-matrix organic light-emitting diode (AMOLED) pixel. The proposed 3-TFT circuit is controlled by an external driver performing the signal readout, processing, and programming operations according to a luminance adjusting algorithm. To maintain the fabrication simplicity, the embedded MIS photosensor shares the same layer stack with pixel TFTs. Performance characteristics of the MIS structure with a nc-Si : H/a-Si : H bilayer absorber were measured and analyzed to prove the concept. The observed transient dark current is associated with charge trapping at the insulator-semiconductor interface that can be largely eliminated by adjusting the bias voltage during the refresh cycle. Other factors limiting the dynamic range and external quantum efficiency are also determined and verified using a small-signal model of the device. Experimental results demonstrate the feasibility of the MIS photosensor for the discussed driving scheme.

Role of the wider Azores region as a nursery ground for North Atlantic blue shark (Prionace glauca)

Tese de Doutoramento, Ciências do Mar (Ecologia Marinha)

Fatty liver characterization and classification by ultrasound

Steatosis, also known as fatty liver, corresponds to an abnormal retention of lipids within the hepatic cells and reflects an impairment of the normal processes of synthesis and elimination of fat. Several causes may lead to this condition, namely obesity, diabetes, or alcoholism. In this paper an automatic classification algorithm is proposed for the diagnosis of the liver steatosis from ultrasound images. The features are selected in order to catch the same characteristics used by the physicians in the diagnosis of the disease based on visual inspection of the ultrasound images. The algorithm, designed in a Bayesian framework, computes two images: i) a despeckled one, containing the anatomic and echogenic information of the liver, and ii) an image containing only the speckle used to compute the textural features. These images are computed from the estimated RF signal generated by the ultrasound probe where the dynamic range compression performed by the equipment is taken into account. A Bayes classifier, trained with data manually classified by expert clinicians and used as ground truth, reaches an overall accuracy of 95% and a 100% of sensitivity. The main novelties of the method are the estimations of the RF and speckle images which make it possible to accurately compute textural features of the liver parenchyma relevant for the diagnosis.

A trophic analysis of target species of macrobenthos in a subtropical coast community: a taxa relationship essay

Studies on the feeding habits of aquatic organisms are a requirement for the management and sustainable use of marine ecosystems. The aim of the present research was to analyze the habits and trophic similarities of decapods, starfish and fish in order to propose trophic relationships between taxa, using Hennigian methods of phylogenetic systematics. This new grouping hypothesis, based on shared and exclusive food items and food types, corresponds to the broad taxonomic groups used in the analysis. Our results indicate that algae, Mollusca, Polychaeta, Crustacea, Echinodermata and Actinopterygii are the most exploited common resources among the species studied. Starfish were differentiated from other organisms for being stenophagic, and were grouped for feeding on bivalve mollusks. A larger group of fish and crustaceans shares algae and mainly crustaceans as food items. A third group united all eight species of Actinopterygii. This largest subgroup of fish is typically carnivorous, feeding on Anthozoa and a great quantity of Crustacea. Synodus foetens has a special position among fishes, due to its unique feeding on nematodes. A Euclidean distance dendrogram obtained in a previous publication grouped S. foetens with starfish. That result was based on a few non-exclusive shared similarities in feeding modes, as well as on shared absences of items, which are not an adequate grouping factor. Starfish are stenophagic, eating bivalves almost exclusively. Synodus foetens and Isopisthus parvipinnis have restricted food items, and are thus intermediary in relation to starfish, decapods, and other fish, which are euryphagous. The trophic cladogram displays details of food items, whether or not shared by all species. The resulting trophic analysis is consistent with known historical relationships.

Genetic population structure and connectivity of Azorean limpets

Ocean Science Meeting. Hawaii Convention Center, Honolulu, Hawaii, USA, 23-28 de Fevereiro.

A dimensão política da segurança para o ciberespaço na União Europeia : a agenda digital, a estratégia de cibersegurança e a cooperação UE-OTAN

Mestrado em Relações Internacionais.

Mutations du roman français depuis les années quatre-vingt : le parcours de Jean Echenoz

Artigo também disponível no PROA-UA: plataforma de revistas em open access da universidade de aveiro com o URI http://revistas.ua.pt/index.php/Carnets/article/view/808/742.

Análise de uma amostragem de caça submarina na Ilha Terceira, no período de 1992 a 2012 : comparação com dados de pesca artesanal

Dissertação de Mestrado em Gestão e Conservação da Natureza.

Estudo sobre o efeito de contágio nos mercados financeiros de acções: aplicação aos índices de acções europeus, americanos, asiáticos e brasileiro no período de Janeiro de 1996 a Junho de 2009 e no sub-período da crise subprime

Mestrado em Contabilidade

Postdischarge feeding of growing “Preemies”: concerns with limiting fat intake [letter]

The didactic update on requirements, types of feeding and dosages of nutrients by Su is a useful guide for clinicians on optimization of nutrition in preterm infants. We take this opportunity to focus on postdischarge nutrition in very preterm infants, which has not yet reached consensus, because of concerns regarding the potentially negative consequences of rapid catch-up growth on obesity and metabolic programming. Some formula feeding approaches have been proposed when mother’s milk is not available.

O reconhecimento e a divulgação dos impostos diferidos em Portugal: Análise às entidades cotadas no PSI geral durante os anos de 2009 a 2011

Mestrado em Fiscalidade

Avaliação de empresas: análise fundamental

Mestrado em Contabilidade

Políticas para el aseguramiento de la calidad en la enseñanza obligatoria de España

La presente comunicación se enmarca en el proyecto de investigación “Evaluaciones nacionales e internacionales como política de mejora de la educación en España en el contexto Europeo” (referencia CEMU-2013-20); financiado en el marco de la segunda convocatoria competitiva de Proyectos de Investigación Multidisciplinares de la Universidad Autónoma de Madrid, aprobada por el Consejo de Gobierno del 8 de febrero de 2013. En este caso, el objetivo principal de la presente comunicación es presentar los sistemas de aseguramiento de la calidad que han implementado en tres Comunidades Autónomas (CCAA) de España: País Vasco, Andalucía y Madrid. En el marco del proyecto mencionado, denominamos políticas de aseguramiento de la calidad a aquellas prácticas, relativamente recientes, orientadas a generar conocimiento sobre el sistema educativo, en este caso, vinculado a la enseñanza obligatoria y acciones dirigidas a su mejora. Con mucha frecuencia, estas prácticas han terminado estando reducidas a evaluaciones externas centradas en el rendimiento de los estudiantes, sin ninguna o con escasas acciones posteriores. Por otra parte, estos sistemas de aseguramiento de la calidad han recibido diversas críticas, en gran parterelacionadas con su lógica original más próxima al mundo empresarial que al educativo. En este sentido, junto con dar a conocer, desde un punto de vista fundamentalmente descriptivo los sistemas de aseguramiento de la calidad de las cuatro CCAA mencionadas, se aborda la discusión centrada en los siguientes aspectos: ¿es posible hablar de sistemas de aseguramiento de la calidad? ¿qué concepciones de calidad subyacente predominan? ¿qué consecuencias tienen para las prácticas educativas?