Home Events Let's Talk About Science! 2nd Edition

Let's Talk About Science! 2nd Edition

On next Monday, 12th October 2015, we will have the second edition of Let's Talk About Science! Following the same concept of the first edition, we have the pleasure to announce three speakers: the SPIE Invited Lecturer, Prof. Silvano Donati, from the Department of Electronics, Faculty of Engineering, Univ. of Pavia, Italy; Prof. Alípio Jorge, from the Department of Computer Science, Faculty of Sciences, Univ. of Porto, and LIAAD – INESC TEC, Portugal and Dr. Rui Vieira da Cunha, Institute of Philosophy, Faculty of Arts, Univ. of Porto, Portugal. Don't Miss It! Be Where The Action Is!
When Oct 12, 2015
from 02:00 to 06:00
Where Department of Biology - FC4 - Room 041
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Prof. Silvano Donati

Self-Mixing Interferometry: a Universal Yardstick to Measure Almost Everything


We start with a theoretical introduction to mutual- and self-coupling phenomena in laser oscillator, and then describe in details the principle of operation of self-mixing interferometer, a new coherent configuration for the measurement of dimensional and kinematic quantities such as: displacement, distance, vibration amplitude, thickness, and angle, and also physical quantities like: coupling factors, line width, alfa-facto index of refraction. In the measurement arrangement, the laser undergoes self-injection at weak level, leading to an amplitude and frequency modulation driven by external optical path length. Then we will describe the developments of a displacement-measuring instrument, first by using the up/down counting of mode hops, then extending the principle of measurement to the case of a diffuse target, reflecting back a field affected by the speckle-pattern statistics. Third, we will report on the successful implementation of two-channel (or, referenced) vibrometer, based on analogue processing of the self-mix signal, in which the speckle-related amplitude errors are removed thanks to a servo-loop concept, and the instrument is capable of true differential operation, on diffuse surface, like a normal optical interferometer operates on legs ending with reflective surfaces. A survey of performances achieved in different design will conclude the talk. 

Prof. Alípio Jorge

Things Like Us

Things can now run software, have access to sensors and to a wealth of information. Things can sense, infer, learn, decide. Things can study us, predict our actions and interfere with our lives. Virtually, they can program themselves and even self-replicate. Is this a sci-fi movie from the eighties? No. It’s just the starting point for a talk about computing and technology with more questions than answers.

Dr. Rui Vieira da Cunha

"A Man Can Die but Once": On Enhancement, Identity and Immortality

Science and technology's pace is relentless and we are being provided everyday with more accurate explanations of how the universe and ourselves work and with applications that can take advantage of such breakthroughs to help us understand our selves better - and maybe, to some extent, redefine our identity and our nature. Beyond what is possible today and what we can envisage for tomorrow, lie fictional futures, utopian dreams and dystopian nightmares: there are amazing opportunities but also risks to be discussed. What will we be like in 50 years? Will we be cyborgs? Enhanced humans? And in 100 years? Will machines take over and rule us? Or will we be the machines? Will we live forever? All of us? And will we want to?


INESC TEC - Laboratório Associado    Universidade do Porto  spie