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Remote Optical Monitor of Blood Oxygenation

Pulse oximetry is a widely used technique in biomedical analyses. It enables monitoring the percentage of saturated hemoglobin and heart pulse in a noninvasive way.The mandatory permanence of patients in medical facilitiesdue to continuous measurements of blood oxygen saturationand cardiac pulse can be avoided by taking advantage of nowadays telecommunications technologies. This paperdescribes a pulse oximeter ...

Optimização eficiente do ganho espectral de amplificadores de Raman com bombage...

We report the use of the Genetic Algorithm (GA) in the optimization of a distributed Raman amplifier spectralgain. The used methodology is based on the direct integrationof Raman propagation equations making use of the transfermatrix method, which ensue into a considerable reduction ofthe computation time. Pointing out an on/off Raman gain of10 dB, we develop a technique based in a combination of theGA with the...

Sitagliptin treatment prevented pancreatic lesions evolution in a rat modelo f ...

Background: This study aimed to elucidate mechanisms underlying the protective effects of sitagliptin, a dipeptidyl peptidase-4 (DPP-4) inhibitor, against pancreatic lesions, in an animal model of T2DM. Methods: Male obese diabetic ZDF (fa/fa) rats, 20-weeks-old, were treated with vehicle or sitagliptin (10mg/kg BW/day) for 6 weeks, and compared with lean control littermates (n=8/each). Biochemical parameters ...

Survival of a probiotic culture incorporated into orange juice after spray-drying

The effect of high pressure on microbiological quality of Alheiras

Network Analyst : uma aplicação no apoio à Protecção Civil

Comunicação oral da qual só está disponível o resumo. ; Network Analyst : uma aplicação no apoio à Protecção Civil.

Estilos parentais, ingestão nutricional e parâmetros antropométricos em criança...

Objectives: Determine the influence of parental styles in anthropometric characteristics and nutritional intake of children. Methods:Cross-sectional study with a sample of 67 male children from a football school, aged between 5 and 12 years old, and their mothers. We carried out anthropometric measurements (weight, height, skinfold thickness, waist circumference) and assessed dietary intake (24-hour dietary rec...

Raman Amplifiers for Use in WDM Systems

In this paper Raman Amplifiers (RAs) for Wavelength Division Multiplexed (WDM) fiber optic systems are analysed. We start by explaining the physical principles of this kind of amplification are explained, and the principal characteristics and advantages of using these amplifiers are enumerated.The technique of multiple pumping (MP) is studied aiming to obtain broadband amplifiers w...

Ferramenta de Simulação para Análise Espectral de Redes de Bragg

Fiber Bragg gratings are becoming important components for optical communication networks, allowing many operations to be realized without the need of conversion between electrical and optical domain. This paper presents a simulation and design tool for spectral characterization of Bragg gratings, based on Matlab, together with a graphical user interface created fromGUIDE toolbox, ...

A New Scheme for OCDMA using 2D Codes and Differential Detection

A new optical system with wavelengthencoding/time-spreading Optical Code Division Multiple Access (O-CDMA) is proposed. Using orthogonal polarizations we can have a simple encoding and decoding of two independent channels and achieve differential detection.The resulting system has a constant null decision threshold and therefore a superior performance when compared with a system with di...