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Goes, J, Paulino N, Ortigueira M.  2002.  A Digital-Domain Self-Calibration Technique for Video-Rate Pipeline A?D Converters Using Gaussian-White Noise, September IEE Electronics Letters. 38:1100–1101., Number 19 AbstractWebsite
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Gomes, L, Coito F, Costa A, Palma LB.  2007.  Teaching, learning, and remote laboratories. Advances on remote laboratories and e-learning experiences. :189. Abstract

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Gomes, R, Batista A, Ortigueira M, Rato R, Baldeiras M.  2010.  Railscan: A Tool for the Detection and Quantification of Rail Corrugation. Emerging Trends in Technological Innovation. 314:401–408. Abstract

Rail corrugation is a phenomenon that leads to a waving in the rails with wavelengths typically between 3 cm and 100 cm and amplitude levels of several microns. The genesis of this waving is complex. Rail corrugation is a recognized problem that leads to excess vibration on the rails and vehicles to a point of reducing their life span and compromising safety. In urban areas excess vibration noise is also a problem. A software tool was developed to analyze accelerometer signals acquired in the boggies of rail vehicles in order to quantify the rail corrugation according to their frequency and amplitude. A wavelet packet methodology was used in this work and compared with the One Third Octave Filter (OTOF) power representations, which is currently used in the industry. It is shown that the former produces better results.

Gomes, L, Coito F, Costa A, Palma L, Almeida P.  2007.  Remote laboratories support within teaching and learning activities. International Conference on Remote Engineering and Virtual Instrumentation. Abstract

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