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Exposure to industrial wideband noise increases connective tissue in the rat li...

Rats were daily exposed (eight hours/day) for a period of four weeks to the same high-intensity wideband noise that was recorded before in a large textile plant. Histologic observation of liver sections of the rats was used to perform quantitative comparison of hepatic connective tissue (dyed by Masson trichromic staining) between the noise-exposed and control animals. For that, we have photographed at random c...

Imaging of the Vocal Tract based on Magnetic Resonance Techniques

Magnetic resonance (MR) imaging has been used to analyze and evaluate the vocal tract shape through different techniques and with promising results in several application fields. Our main purpose is to demonstrate the relevance of MR and techniques of image processing in the analysis of vocal tract. The extraction of contours of the air cavities from 2D images (slices) allowed the built of several 3D reconstruc...

Modelling and Segmentation of the Vocal Track during Speech Production by using...

A New Linear Parametrization for Peak Friction Coefficient Estimation in Real Time

The correct estimation of the friction coefficient in automotive applications is of paramount importance in the design of effective vehicle safety systems. In this article a new parametrization for estimating the peak friction coefficient, in the tire-road interface, is presented. The proposed parametrization is based on a feedforward neural network (FFNN), trained by the Extreme Learning Machine (ELM) method. ...

Caracterização da Patologia Pulmonar Induzida pela Exposição ao Ruído e à Poeir...

Arrest in ciliated cell expansion on the bronchial lining of adult rats caused ...

Workers chronically exposed to high-intensity/low-frequency noise at textile plants show increased frequency of respiratory infections. This phenomenon prompted the herein investigation on the cytology of the bronchial epithelium of Wistar rats submitted to textile noise. Workplace noise from a cotton-mill room of a textile factory was recorded and reproduced in a sound-insulated animal room. The Wistar rats we...

Reduction of Rat Pleural Microvilli Caused by Noise Pollution

Scanning electron microscopy (SEM) was used to investigate whether chronic exposure to noise modifies pleural morphology. Rats were submitted to 8-h/day schedule of noise that is similar to the working hours at cotton-mill rooms. Morphometry of the area occupied by microvilli on the pleural surface showed a decrease in microvilli after 3 months of rat exposure to noise. The reduction of microvilli was 10% after...

The new megachurch for the sanctuary of Fatima

The Sanctuary of Fátima (Portugal) is a world known Catholic pilgrimage center since 1917 when Holy Mary appeared to three children. The project for the 9,000-seat church of the Most Holy Trinity is in its final stage designed by the Greek architect A. Tombazis. This mega church will have a volume of about 130,000 m3 and an average height of 15 m with two modes of use configurations (3,000 and 9,000 seats). Its...

Acquisition and reproduction of factory noise with low-frequency extended bandw...

A case study concerning the problem of collecting noise sound signals from a typical factory shop-floor, down from 2 Hz to 20 kHz, and reproducing them in a biologically controlled small reverberant closed-room for in-vivo investigation of the biological effects of noise radiation is presented. The project of the electro-acoustic set-up for recording and reproduction is described, with discussion of the encount...

Sistema de instrumentação virtual para monitorização de máquinas eléctricas