Pedras, Celestina; Silva, Elisa; Martins, Fernando; Fernandez, Helena; Lourenço, Luciano; Lança, Rui
A visita técnica às áreas ardidas no incêndio da Catraia, como ficou conhecido, está
integrada no último dia do programa do I SEMINÁRIO DA REDE INCÊNDIOS-
-SOLO e I SIMPÓSIO IBERO-AFRO-AMERICANO DE RISCOS, subordinado
ao tema “Riscos, Incêndios Florestais e Território”. Esta visita será acompanhada por
técnicos da Câmara Municipal de São Brás que irão apresentar os aspetos mais
relevantes relativos ao processo de ignição e propagação do incêndio que deflagrou
entre 18 e 21 de Julho de 2012, assim como os principais efeitos na área afetada.
Costa, Aníbal; Costa, Alexandre A.; Oliveira, Carlos Sousa; Varum, Humberto; Estêvão, João Manuel Carvalho; Vicente, Romeu; Maio, Rui; Ferreira, Tiago Miguel
A qualidade de vida nos núcleos urbanos constitui uma meta dinâmica, fortemente influenciada pelos processos sociais e económicos, pela evolução das suas exigências e expectativas e pela evolução do próprio tecido urbano, do parque edificado e das infraestruturas. Nos núcleos urbanos antigos, são peças fundamentais deste desafio a garantia do conforto e de salubridade, num equilíbrio que se quer, sustentado e sustentável, com a preservação das memórias e da cultura local. Para além da inadequada resistência à ação sísmica, a grande maioria deste edificado encontra-se em avançado estado de degradação, situação que, aliada a outros fenómenos de índole social, tem...
Rodrigues, J. M. F.; Cardoso, Pedro J. S.; Vilas, Tiago; Silva, Bruno; Rodrigues, Pedro; Belguinha, António; Gomes, Carlos
Soccer is a sport where everyone that is involved with it make all the efforts aiming for excellence. Not only the players need to show their skills on the pitch but also the coach, and the remaining staff, need to have their own tools so that they can perform at higher levels. Footdata is a project to build a new web application product for soccer (football), which integrates two fundamental components of this sport's world: the social and the professional. While the former is an enhanced social platform for soccer professionals and fans, the later can be considered as a...
Aníbal, J.; Esteves, E.
Tuna is a generic name for fi sh from the Scombridae family, which includes about
50 species, mostly from the Thunnus genus. Tuna is a very important commercial
resource widely but sparsely distributed throughout the oceans of the world that
generally occurs in tropical and temperate waters between about 45° north and
south of the equator (FAO 2010 ). Because of high muscular activity, some tuna species
display warm-blooded adaptations and can raise their body temperatures above
surrounding water temperatures (Randall et al. 2002 ). This enables them to survive
in cooler ocean environments and to inhabit a wider geographic range of latitudes
than other kinds of fi...
Cruz, R. M. S.; Vieira, M. M. C.; Silva, C. L. M.
Consumer demand for safer and nutritious food products has led to development and research of new processing technologies. Throughout the centuries, vitamin C has played an important role in human nutrition due to its antioxidant effect and stimulation of the immunological system. Nevertheless, since the human organism does not produce its own vitamin C, it must be sourced from a regular diet or taken as a vitamin supplement. Besides its natural availability it is possible to find vitamin C in many different forms. The development of new food products formulations including vitamin C and new processing operations in order to...
Cruz, R. M. S.; Vieira, M. M. C.; Silva, C. L. M.
The development of innovative and more efficient processing operations aiming at less severe heat treatment and higher quality food products are common in food preservation research. These emerging technologies may have an extraordinary significance on the product's final quality, and consequently may bring out new opportunities that fulfill the market requirements. Ultrasound is considered to be an emerging and promising non-thermal food processing technology. In this chapter a review of its applications and effects in food processing will be presented. Despite its original function, in degassing or homogenization of solutions, its use is widely reported in hurdle technologies and combined...
Cardoso, A. J. Marques; Oliveira, L. M. R.
The electricity market was, for a long time, dominated by national or regional monopolies.
During the last decades, this picture has changed drastically, particularly in Europe and
in the United States. The trend toward free competition and privatization with the related
demands on return on investments results in a cost consciousness among utilities. In this
context, monitoring and on-site diagnostics are seen as a possible way of optimizing existing
assets. The main driving forces are to reduce maintenance costs, to prevent forced
outages with the related consequential costs, and to work existing equipment harder and longer . Transformers constitute the largest single component of the transmission...
Oliveira, L. M. R.; Cardoso, A. J. Marques
This paper describes the application of the p-q power theory to the differential protection of power transformers. The information provided by the harmonic content of the differential active and reactive power components is used to detect winding insulation failures and to distinguish them from magnetizing inrush current transients. A variety of test cases is presented in the
paper, demonstrating the effectiveness of the protection strategy.
Terzic, Kasim; Lobato, D.; Saleiro, Mário; Martins, Jaime A.; Farrajota, Miguel; Rodrigues, J. M. F.; du Buf, J. M. H.
Building a general-purpose, real-time active vision system completely based on biological models is a great challenge. We apply a number of biologically plausible algorithms which address different aspects of vision, such as edge and keypoint detection, feature extraction,optical flow and disparity, shape detection, object recognition and scene modelling into a complete system. We present some of the experiments from our ongoing work, where our system leverages a combination of algorithms to solve complex tasks.
Venha conhecer o processo de fermentação que possibilita a produção de vinhos, aguardentes e licores de laranja. Em modalidade de oficina de ciência aprenda a cristalizar a casca da laranja, a confecionar saladas e sumos de laranja, compotas e gelatinas com cascas da laranja. Oradoras: Prof. Ludovina Rodrigues Galego (ISE) e Eng.ª Conceição Silva (Quinta do Freixo - Benafim) .
A aguardente de medronho, muitas vezes designada apenas por medronho, é um destilado que continua a ser produzida, essencialmente de forma artesanal. A sua produção, tudo indica, ter iniciado em Monchique, no século X, pelos Árabes. A qualidade deste destilado passou por fases polémicas, principalmente pela escassez de mão-de-obra. Depois de um período de investigação laboratorial e de trabalho com produtores locais, envolvendo várias Instituições da região, a qualidade da aguardente de medronho foi paulatinamente melhorando. O controlo de qualidade das aguardentes é feito, essencialmente, recorrendo a técnicas cromatografias e espetrofotométricas. Técnicas que permitem diferenciar não só a qualidade, como...
Vieira, M. M. C.
The objective of the present work was to
study the shelf life of a recipe of a fish sauce
Garum originated in the roman empire.
Dinis, Rui; Silva, Paulo; Araújo, Teresa
We consider MC-CDMA schemes, with reduced envelope fluctuations. Both CP-assisted (cyclic prefix) and ZP (zero-padded) MC-CDMA schemes are addressed. We develop turbo FDE (frequency-domain equalization) schemes, combined with cancelation of nonlinear distortion effects. The proposed turbo receivers allow significant performance improvements at low and moderate SNR, even when the transmitted signals have reduced envelope fluctuations.
Silva, Paulo; Dinis, Rui
A DS-CDMA (Direct Sequence-Coded Division Multiple
Access) system has maximum spectral efficiency if the
system is fully loaded (i.e., the number of users is equal to the
spreading factor) and we employ signals with bandwidth equal
to the chip rate. However, due to implementation constraints we
need to employ signals with higher bandwidth, decreasing the
system’s spectral efficiency. In this paper we consider prefixassisted
DS-CDMA systems with bandwidth that can be significantly
above the chip rate. To allow high spectral efficiency we
consider highly overloaded systems where the number of users
can be twice the spreading factor or even more. To cope with
the strong interference levels we present an iterative...
Martins, J. C.; Rodrigues, J. M. F.; du Buf, J. M. H.
In his introduction, Pinna (2010) quoted one of Wertheimer’s observations: “I
stand at the window and see a house, trees, sky. Theoretically I might say there
were 327 brightnesses and nuances of color. Do I have ‘327’? No. I have sky,
house, and trees.” This seems quite remarkable, for Max Wertheimer, together
with Kurt Koffka and Wolfgang Koehler, was a pioneer of Gestalt Theory:
perceptual organisation was tackled considering grouping rules of line and edge
elements in relation to figure-ground segregation, i.e., a meaningful object (the
figure) as perceived against a complex background (the ground).
At the lowest level –...
Farrajota, Miguel; Saleiro, Mário; Tersic, K.; Rodrigues, J. M. F.; du Buf, J. M. H.
Human-robot interaction is an interdisciplinary
research area which aims at integrating human factors, cognitive
psychology and robot technology. The ultimate goal is
the development of social robots. These robots are expected to
work in human environments, and to understand behavior of
persons through gestures and body movements. In this paper
we present a biological and realtime framework for detecting
and tracking hands. This framework is based on keypoints
extracted from cortical V1 end-stopped cells. Detected keypoints
and the cells’ responses are used to classify the junction type.
By combining annotated keypoints in a hierarchical, multi-scale
tree structure, moving and deformable hands can be segregated,
their movements can be obtained, and they can...
Leitão, R.; Brito, Ana; Rodrigues, J. M. F.
Soluções de realidade virtual e aumentada
têm vindo a ser utilizadas no segmento de ensino explorando
diferentes modalidades de interação de forma a proporcionar
ao aluno acesso efetivo de informação em situações
de experiências imersivas em tempo real. Na internet podemos
encontrar variadíssimas aplicações educacionais, que
nos ajudam a todos, desde as crianças em idade escolar até
a profissionais de todas as áreas, proporcionando o estudo
mais interativo, divertido e mais envolvente. Neste artigo,
onde assumimos que o contexto de ensino é propício para a
experimentação de novos modelos de ensino/aprendizagem,
apresentamos uma aplicação educacional na área da geometria
com o objetivo de potencializar a transferência de
conhecimento, salientando as características dimensionais
Farrajota, Miguel; Martins, J. C.; Rodrigues, J. M. F.; du Buf, J. M. H.
A biological disparity energy model can estimate local depth information
by using a population of V1 complex cells. Instead of applying an analytical
model which explicitly involves cell parameters like spatial frequency,
orientation, binocular phase and position difference, we developed a model
which only involves the cells’ responses, such that disparity can be extracted
from a population code, using only a set of previously trained cells
with random-dot stereograms of uniform disparity. Despite good results
in smooth regions, the model needs complementary processing, notably at
depth transitions. We therefore introduce a new model to extract disparity
at keypoints such as edge junctions, line endings and points with large
Rodrigues, J. M. F.; Lam, Roberto Célio Lau; du Buf, J. M. H.
Empirical studies concerning face recognition suggest that faces may be stored in memory by a few canonical representations. In cortical area V1 exist double-opponent colour blobs, also simple, complex and end-stopped cells which provide input for a multiscale line/edge representation, keypoints for dynamic feature routine, and saliency maps for Focus-of-Attention.
Rodrigues, J. M. F.; du Buf, J. M. H.
Complete image ontology can be obtained by formalising a top-down meta-language wich must address all possibilities, from global message and composition to objects and local surface properties.