Encontrados 6 documentos, a visualizar página 1 de 1
Mitochondrial haplogroup H1 is protective for ischemic stroke in Portuguese pat...
Rosa, A.; Fonseca, B.V.; Krug, T.; Manso, H.; Gouveia, L.; Albergaria, I.; Gaspar, G.; Correia, M.; Viana-Baptista, M.; Simões, R.M.; Pinto, A.N.The genetic contribution to stroke is well established but it has proven difficult to identify the genes and the disease-associated alleles mediating this effect, possibly because only nuclear genes have been intensely investigated so far. Mitochondrial DNA (mtDNA) has been implicated in several disorders having stroke as one of its clinical manifestations. The aim of this case-control study was to assess the c...
Optical Communications Research at Institute of Telecommunications
Rocha, J. F.; Cartaxo, A. T.; Silva, H. J.; Pinto, J. L.; Teixeira, A. L.; Gameiro, A. S.; Monteiro, P. P.; Pires, J. O.; Ribeiro, R. S.; Violas, M. O.In this contribution we present a brief summary of research activities carried out at Instituto de Telecomunicações (IT, Institute of Telecommunications) in optical communications. These activities cover various aspects related with optical components/subsystems, optical communication systems, and optical networking. ; http://www.informaworld.com/10.1080/01468030590923073
40-Gb/s systems on G.652 fibers: comparison between periodic and all-at-the-end...
Pizzinat, A.; Schiffini, A.; Alberti, F.; Matera, F.; Pinto, A. N.; Almeida, P.In the literature, two system solutions have been proposed to overcome high dispersion problems typical of G.652 fibers at high bit rates (40 Gb/s): they are periodic and all-at-the-end dispersion compensation. We carry out an exhaustive comparison between the two methods that, up to this moment, have been studied separately. In the first part, we introduce a simplified model on strong dispersion management (DM...
Research of the optical communications groups at University of Aveiro and Insti...
da Rocha, J.F.; Tavares, P.; Frazão, O.; Monteiro, P.; Andre, P.S.; Teixeira, A.; Lima, M.; Pinto, A.N.; Gameiro, A.; Ribeiro, R.; Ribeiro, L.This paper summarizes the research activities of the optical communications group at University of Aveiro and Institute of Telecommunications – Aveiro pole. Several activities like clock recovery systems, both electrical and all optical, electrical equalizers for very high bit rate DST systems, post-detection filters for multigigabit optical receivers, soliton systems, simulation work on WDM, DST, EDFA and shor...
Perimesencephalic hemorrhage.
Canhão, P; Serviço de Neurologia, Neurocirurgia e Radiologia, Hospital Santa Maria, Lisboa.; Pinto, A N; Pinho e Melo, T; Ferro, J M; Campos, J GAmong 293 subarachnoid hemorrhages admitted to the Neurology and Neurosurgery departments of Sta Maria Hospital, 108 patients had a normal cerebral angiography. Twenty-three meet the radiological criteria for perimesencephalic hemorrhage (center of the hemorrhage located in front of the mesencephalon, without blood in the interhemispheric and lateral sylvian fissures, nor significant intraventricular hemorrhage...
The transesophageal echocardiogram in the evaluation of cerebrovascular diseases.
Pinto, A N; Serviço de Neurologia, UTIC-Arsénio Cordeiro, Hospital de Santa Maria, Lisboa.; Ferro, J M; Sá, A B; Pais, FWe evaluated the diagnostic sensitivity and clinical value of transesophageal echocardiogram in 72 patients with a potential cardiogenic embolic stroke or transient ischemic attacks at the Neurological Department/Cerebrovascular disorders out-patient clinic of Santa Maria Hospital between February 1991 - February 1993. The transesophageal echocardiogram was performed in UTIC-Arsénio Cordeiro after current diagn...
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