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Cointegration and Structural Breaks in the EU Sovereign Debt Crisis
Ferreira, N. B.; Menezes, R.; Bentes, S.First signs of a sovereign debt crisis spread among financial players in the late 2009 as a result of the growing private and government debt levels worldwide. Late 2010, Trichet (then President of the ECB) stated that the sovereign debt crisis in Europe had become systemic. In an established crisis context, it was searched for evidence of structural breaks and cointegration between interest rates and stock mar...
An analysis of equity markets cointegration in the european sovereign debt crisis
Ferreira, N. B.; Oliveira, M. M.A simplified presentation of an empirical finding in the portfolio diversification literature is that diversifying across countries is more effective in reducing risks than diversifying across industries. While the linear approach is not designed to capture a significant integration, this is not the case when Gregory and Hansen cointegration tests are used to assess this relation by allowing for instability in thes...
Management of pediatric traumatic macular holes - case report
Azevedo, S.; Ferreira, N.; Meireles, A.Abstract PURPOSE: To report and describe the clinical course of four pediatric traumatic macular hole (TMH) cases and respective management. CASE REPORT: Four pediatric patients with macular hole following blunt ocular trauma underwent early pars plana vitrectomy, with consecutive hole closure. Initial visual acuity was <20/400 or worse in all patients. After surgery, all patients had visual acuity improvement,...
Management of pediatric traumatic macular holes - case report
Azevedo, S.; Ferreira, N.; Meireles, A.PURPOSE: To report and describe the clinical course of four pediatric traumatic macular hole (TMH) cases and respective management. CASE REPORT: Four pediatric patients with macular hole following blunt ocular trauma underwent early pars plana vitrectomy, with consecutive hole closure. Initial visual acuity was <20/400 or worse in all patients. After surgery, all patients had visual acuity improvement, with fin...
Bilateral proliferative retinopathy as the initial presentation of chronic myel...
Macedo, M.; Figueiredo, A.; Ferreira, N.; Barbosa, I.; Furtado, M.; Correia, N.; Gomes, M.; Lume, M.; Menéres, M.; Santos, M.; Meireles, M.The authors report a rare case of a 48-year-old male with chronic myeloid leukemia (CML) who initially presented with a bilateral proliferative retinopathy. The patient complained of recent visual loss and floaters in both eyes (BE). Ophthalmologic evaluation revealed a best corrected visual acuity (BCVA) of 20/50 in the right eye and 20/200 in the left eye (LE). Fundoscopy showed the presence of bilateral peri...
Nucella lapillus L. imposex levels after legislation prohibiting TBT antifoulan...
Galante-Oliveira, S.; Oliveira, I.; Ferreira, N.; Santos, J. A.; Pacheco, M.; Barroso, C.Nucella lapillus (dog whelk) imposex levels were assessed along the mainland Portuguese coast in 2006 and 2008 and were compared with available data from 2003 for the same area. Given that specimen size has been described as a factor inducing variation in some of the imposex assessment indices, and thus resulting in less reliable results, new monitoring and data analysis procedures are described and applied to ...
Structural and optical properties of europium doped zirconia single crystals fi...
Soares, M.R.N.; Nico, C.; Peres, M.; Ferreira, N.; Fernandes, A.J.S.; Monteiro, T.; Costa, F.M.Yttria stabilized zirconia single crystal fibers doped with europium ions were developed envisaging optical applications. The laser floating zone technique was used in order to grow millimetric high quality single crystal fibers. The as-grown fibers are completely transparent and inclusion free, exhibiting a cubic structure. Under ultraviolet (UV) excitation, a broad emission band appears at 551 nm. The europiu...
Avaliação de edema pulmonar agudo num modelo experimental usando vesículas lipí...
Santos, A. C.; Matos, C. M.; Silva, M. A.; Perestrelo, S. L.; Borges, F. J.; Oliveiros, B.; Almeida, T.; Ferreira, N.Resumo do poster apresentado ao XII Congresso Nacional de Medicina Nuclear, 12-14 Novembro 2009, Mealhada
Processamento mínimo de mini beterraba.
FERREIRA, N. A.; LOPES, S. B.; MORETTI, C. L.; MATTOS, L. M.2009
Clear-PEM: A PET imaging system dedicated to breast cancer diagnostics
Abreu, M. C.; Aguiar, D.; Albuquerque, E.; Almeida, F. G.; Almeida, P.; Amaral, P.; Auffray, E.; Bento, P.; Bruyndonckx, P.; Bugalho, R.; Carriço, B.The Clear-PEM scanner for positron emission mammography under development is described. The detector is based on pixelized LYSO crystals optically coupled to avalanche photodiodes and readout by a fast low-noise electronic system. A dedicated digital trigger (TGR) and data acquisition (DAQ) system is used for on-line selection of coincidence events with high efficiency, large bandwidth and small dead-time. A sp...
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