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Linear invariant systems theory for signal enhancement
A. M. Tomé; A. R. Teixeira; A. Teixeira; G. Miguel; P. Georgieva; E. w. LangThis paper discusses a linear time invariant (LTI) systems approach to signal enhancement via projective subspace techniques. It provides closed form expressions for the frequency response of data adaptive finite impulse response eigenfilters. An illustrative example using speech enhancement is also presented. ; Este artigo apresenta a aplicação da teoria de sistemas lineares invariantes no tempo...
In vivo and in vitro anti-inflammatory and anti-nociceptive activities of lovas...
Gonçalves,D.O.; Calou,I.B.F.; Siqueira,R.P.; Lopes,A.A.; Leal,L.K.A.; Brito,G.A.C.; Tomé,A.R.; Viana,G.S.B.Statins are among the most prescribed drugs in recent clinical practice. They are also known for their pleiotropic actions, which are independent of their lipid-lowering properties. The effect of lovastatin was investigated against carrageenan-induced paw edema in male Wistar rats (200-250 g) and on leukocyte migration, as measured by carrageenan-induced peritonitis in male Swiss mice (20-25 g), which are model...
Effects of Li+ transport and intracellular binding on Li+/Mg2+ competition in b...
Fonseca, C. P.; Montezinho, L. P.; Nabais, C.; Tomé, A. R.; Freitas, H.; Geraldes, C. F. G. C.; Castro, M. M. C. A.Li+ transport, intracellular immobilisation and Li+/Mg2+ competition were studied in Li+-loaded bovine chromaffin cells. Li+ influx rate constants, ki, obtained by atomic absorption (AA) spectrophotometry, in control (without and with ouabain) and depolarising (without and with nitrendipine) conditions, showed that L-type voltage-sensitive Ca2+ channels have an important role in Li+ uptake under depolarising co...
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