O problema principal no tratamento de fracturas em osso frágil é a fixação óssea dos diversos tipos de implantes. As placas com parafuso deslizante, as cavilhas endomedulares e o efeito em banda de tensão, encontram nestas situações traumáticas a sua melhor indicação, por a forma a maximizar a compressão óssea e diminuir a tensão na interface osso-implante. Para além disso, a vertebroplastia e a cifoplastia têm...
Outlining the best strategies for seismic risk mitigation requires that both benefits and costs of retrofitting are known in advance. The assessment of the vulnerability of building typologies is a first step of a more extensive effort, concerning the analysis of the viability of seismic risk mitigation and taking into account retrofitting costs. The methodology adopted to obtain the seismic vulnerability of so...
Os edifícios de “placa” caracterizam-se por possuírem pavimentos em betão que descarregam directamente em paredes, podendo estas possuir capacidade resistente ou não. Estes edifícios foram construídos em Portugal Continental entre as décadas de 1930 e 1960 [1] e representam, na actualidade, cerca de 40% do parque habitacional [2]. Dada a elevada representatividade desta tipologia construtiva no edificado nacion...
The reconstruction of Lisbon Downtown after the 1755 earthquake was based on a novel constructive system based on masonry buildings with an internal three-dimensional timber-framed structure named "gaiola pombalina". This internal structure aimed at improving the global stability of masonry buildings, enhancing their capacity to dissipate energy under seismic loadings. This paper aims at getting experimental in...
The reconstruction of Lisbon Downtown after the 1755 earthquake was based on a novel constructive system based on masonry buildings with an internal three-dimensional timber-framed structure named “gaiola pombalina”. This internal structure aimed at improving the global stability of masonry buildings, enhancing their capacity to dissipate energy under seismic loadings. This paper aims at getting experimental in...
Paper 144 ; As result of a benchmarking process on foreign computer codes for design of masonry buildings, the guidelines for the development of a Portuguese design software for plain masonry buildings are presented. The related software was inspired on Italian methods, particularly the RAN, and allows to perform a global response analysis of buildings, based on the assumption of a cumulative response of store...
A presente comunicação apresenta um estudo em curso sobre a análise de custos em obras de reabilitação de edifícios no Laboratório Nacional de Engenharia Civil (LNEC), no âmbito do projecto ProNIC [1]. Este projecto é constituído por uma aplicação informática onde são definidos trabalhos de construção numa estrutura de capítulos. Cada trabalho é arrumado nessa estrutura e constitui o seu nível inferior. Assim, ...
Seasonal variation in container productivity and infestation levels by Aedes aegypti were evaluated in two areas with distinct levels of urbanization degrees in Rio de Janeiro, a slum and a suburban neighborhood. The four most productive containers can generate up to 90% of total pupae. Large and open-mouthed containers, such as water tanks and metal drums, located outdoors were the most productive in both area...
Este trabalho teve por objetivo avaliar o efeito da irradiação UV-C no controle in vitro de Monilinia fructicola e Rhizopus stolonifer e no controle das doenças causadas por estes fungos em pêssegos inoculados com ferimento. No experimento in vitro, avaliou-se o crescimento micelial dos fungos em meio BDA após a exposição nas doses de UV-C de 0, 0,26, 0,52, 1,04, 3,13, 5,22, 10,44, 15,66, e 31,32 kJ.m-2 num equ...
The unbalanced excitatory/inhibitory neurotransmitter function in the neuronal network afflicted by seizures is the main biochemical and biophysical hallmark of epilepsy. The aim of this work was to identify changes in the signaling mechanisms associated with neuropeptide Y (NPY)-mediated inhibition of glutamate release that may contribute to hyperexcitability. Using isolated rat hippocampal nerve terminals, we...
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