José Brito

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We report on quantum frequency conversion of near-infrared photons from a wave-length of 854 nm to the telecommunication O-band at 1310 nm with 8 % overall conversion efficiency. Entangled photon pairs at 854 nm are generated via type-II spontaneous parametric down conversion. One photon is mixed with a strong pump field in a nonlinear ridge waveguide for(More)
This paper discusses an application of multipopulation continuous genetic algorithms to learning of vocal tract configurations on a midsagittal plane. Speaker dependent and independent target signal corpora are formed and processed by the genetic approach, which evolves populations of articulatory vectors in order to approximate the acoustic traits of(More)
The purpose of the present study was to analyze gas exchanges in leaves and the parameters of productivity of beans (Phaseolus vulgaris, L.) submitted to two water deficiency periods during which three water regimes were employed: W1 (1,0 ETo during the entire plant cycle); W2 (1,0 ETo up to the flowering period and irrigation interruption from the 37 to(More)
The field of DNA vaccine technology has experienced an increasing development during the last 10 years, being an attractive, cost effective and simple choice for researchers. Here, we focus on the relevant principles for designing an efficient pharmaceutical-grade plasmid DNA manufacturing process for human use. Plasmid DNA constructs pIDKE2S (coding for(More)
Progression of Parkinson disease (PD) increases severe motor symptoms such as bradykinesia, tremor, gait disturbance and postural instability, interfering with patients' daily life autonomy. Clinical evaluation is based on specific Scales like Hoehn & Yahr (H&Y) or UPDRS scales. The main goal of the study was to identify motor changes in the(More)
The speech inverse problem focuses on retrieving the best articulatory vectors for the task of synthesizing a target voice signal. In this research the problem is approached from a neuromotor level, and by means of some machine learning techniques. Specifically, speech articulators are represented on the midsagittal plane, and controlled by muscular(More)
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