Encontrados 15 documentos, a visualizar página 1 de 2
Wavelength Conversion with MZI-SOAs
T. Silveira; N. Yan; L. Oliveira; A. Teixeira; A. Ferreira; E. Tangdiongga; P. Monteiro; A.M.J. KoonenWavelength multicasting at 40Gb/s is demonstrated by all-optical multi-wavelength conversion based on a single MZI-SOA. Simultaneous ITU grid 200GHz spaced one-to-four conversion is achieved with negligible sensitivity difference among all the multicast channels. Furthermore, we propose some new all-optical applications enabled by this technology. ; Wavelength multicasting at 40Gb/s is demonstrated by all-opti...
The influence of ACE ID and ACTN3 R577X polymorphisms on lower-extremity functi...
Pereira, Ana; Costa, Aldo M.; Monteiro, A.M.; Izquierdo, Mikel; Silva, A.J.; Bastos, Estela; Marques, M.C.Background We studied the influence of the ACE I/D and ACTN3 R577X polymorphisms (single or combined) on lower-extremity function in older women in response to high-speed power training. Methods One hundred and thirty-nine healthy older Caucasian women participated in this study (age: 65.5 ± 8.2 years, body mass: 67.0 ± 10.0 kg and height: 1.57 ± 0.06 m). Walking speed (S10) performance and functional capac...
Efeitos de diferentes programas de treino sobre a aptidão funcional e composiçã...
Monteiro, A.M.Esta tese teve como principais objectivos: (i) Avaliar a contribuição relativa da actividade física (AF) diária objectivamente estimada, na aptidão funcional (ApF), força isocinética e composição corporal (CC) de idosas residentes na comunidade; (ii) Desenvolver um modelo estrutural de análise do medo de cair relacionando a força muscular, equilíbrio e densidade mineral óssea em idosas independentes; (iii) Exam...
Effect of high-speed power training on improving muscular and functional perfor...
Pereira, A.; Silva, A.J.; Costa, A.; Monteiro, A.M.; Marques, M.C.Introduction In older populations, maintenance of muscle power output is a key factor in everyday task performance, such as climbing stairs, rising from a chair and walking, as well as in decreasing the likelihood of falls, especially in women (Häkkinen et al., 1998; Izquierdo et al., 2001). The purpose of the study was to examine the effects of 12 weeks high-speed power training on maximal strength (1RM) and f...
Postural balance in elderly evaluated in a force platform: the vestibular syste...
Novo, André; Mendes, Eugénia; Preto, Leonel; Monteiro, A.M.; Azevedo, Ana; Correia, João; de Paz, JoséBalance dysfunction remains a significant factor for disability in the elderly [1]. Several mechanisms have been proposed do explain the changes in balance during aging. Balance disorders represent a growing public health problem due to the association with falls and fall related injuries [2]. The complexity of the balance system, however, often requires a thorough, multidisciplinary approach to the evaluation ...
Postural balance in elderly evaluated in a force platform: the vestibular syste...
Novo, André; Mendes, Eugénia; Preto, Leonel; Monteiro, A.M.; Azevedo, Ana; Correia, João; de Paz, JoséBalance dysfunction remains a significant factor for disability in the elderly [1]. Several mechanisms have been proposed do explain the changes in balance during aging. Balance disorders represent a growing public health problem due to the association with falls and fall related injuries [2]. The complexity of the balance system, however, often requires a thorough, multidisciplinary approach to the evaluation ...
Estudo da associação entre receio de queda e análise postural na população sénior
Chaves, L.; Gomes, J.; Mendes, C.; Mota, C.; Pires, J.; Regêncio, M.; Pereira, A.; Monteiro, A.M.Os factores biológicos, doenças e causas externas podem influenciar a fase de envelhecimento. A queda é considerada como uma causa externa já que é um evento não esperado, no qual o indivíduo muda de posição em relação à sua posição inicial, o que poderá acarretar sérios problemas para o idoso. A queda ocorre devido à perda total do equilíbrio postural, podendo estar relacionada à insuficiência súbita dos mecan...
Estimation of Risk-Neutral Density Surfaces
Monteiro, A. M.; Tütüncü, R. H.; Vicente, L. N.Option price data is often used to infer risk-neutral densities for future prices of an underlying asset. Given the prices of a set of options on the same underlying asset with different strikes and maturities, we propose a nonparametric approach for estimating risk-neutral densities associated with several maturities. Our method uses bicubic splines in order to achieve the desired smoothness for the estimation...
Influence of hormonal replacement therapy in lipid peroxidation levels of postm...
Mota, Maria Paula; Soares, J.; Moreira, M.H.; Leitão, J.C.; Freitas, J.; Monteiro, A.M.; Figueiredo, P.; Duarte, José AlbertoIt has been suggested that exercise has a positive impact on the prevention and progression of cardiovascular disease (CVD). One of the main mechanisms is through the modification of lipoprotein levels and the risk of its oxidation, especially LDL lipoproteins. After menopause, women experience an increased incidence of cardiovascular disease. In contrast, women receiving hormonal replacement therapy (HRT) seem...
Representação e propagação de incertezas em dados de solos: I - Atributos categ...
Bönisch,S.; Assad,M. L. Lopes; Câmara,G.; Monteiro,A. M. V.Este trabalho teve por objetivos utilizar krigagem por indicação para espacializar propriedades de solos expressas por atributos categóricos, gerar uma representação acompanhada de medida espacial de incerteza e modelar a propagação de incerteza pela álgebra de mapas por meio de procedimentos booleanos. Foram estudados os atributos: teores de potássio (K) e de alumínio trocáveis, saturação por bases (V), soma d...
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