21/02 – seminario “Graph Signal Processing: Theory and Applications”

Il giorno 21 febbraio 2019 alle ore 10.00 presso l’Università degli Studi di Roma “Tor Vergata” Macroarea di Ingegneria – Via del Politecnico, 1 – Aula B15 – Edificio Didattico

Il Prof. Sergio Barbarossa dell’ Università di Roma La Sapienza terrà un seminario organizzato dal Prof. Gaspare Galati per la Ph.D. School in Electronic Engineering – DIE – Tor Vergata University su:

Graph Signal Processing: Theory and Applications

Abstract: Graph-based representations play a significant role in machine learning as a formal way to capture (pairwise) relations among data or time series. In this talk, we review the fundamentals of graphical methods applied to unsupervised and semisupervised learning and then we present some aspects of current research in the field, including the case where the knowledge about the graph is imperfect or when it is necessary to go beyond pairwise representations.

Sergio Barbarossa is a full professor in the Information Engineering, Electronics and Telecommunications Department of Sapienza University of Rome, Italy. He is an IEEE Fellow and EURASIP Fellow. For more than 25 years, he has been working in signal processing, radar remote sensing, sensor and telecommunication networks. Since 2000 he has been involved in European projects as a Technical Manager or Principal Investigator. He is now the technical manager of a H2020 Europe‐Japan project on 5G. His main current research interests are on mobile edge computing, 5G networks, distributed optimization, machine learning and signal processing on graphs.

12/02 – “The Redefinition of the International System of Units”, seminario di Luca Callegaro (INRIM)

The Redefinition of the International System of Units
seminario del dr. Luca Callegaro, INRIM

12 febbraio 2019, ore 15
Aula B15 – Edificio DIDATTICA
Macroarea di Ingegneria


Il dr. Luca Callegaro (INRIM) terrà un seminario organizzato dal prof. Gaspare Galati per la Ph.D. School in Electronic Engineering – DIE – Tor Vergata University su The Redefinition of the International System of Units

Abstract: The International System of units (SI) is the basis of modern day measurements. In the SI currently in force, base units are defined in very different ways; the kilogram is defined as the mass of a single object, the international prototype – a cylinder of platinum-iridium alloy manufactured in 1889. The prototype is unique, at risk of damaging, nearly inaccessible (only about every 40 years) and there is some evidence of a change in its mass. On 16 November 2018 the General Conference of Weights and Measures has approved a major redefinition of the SI. All the seven base units will be defined in terms of a fundamental constant of nature, which will have an exact value. It will be possible to realize the units everywhere and everytime, by probing with experiments these fundamental constants. Electrical units will be defined in terms of the elementary charge e and the Planck constant h; it will be possible to realize the volt, ohm and ampere by quantum experiments in solid- state devices. The kilogram, redefined in terms of h, will be realized by counting atoms in a silicon sphere, or linking it to the quantum realization of the electrical power unit, the watt. The redefinition will enter into force on the implementation day: May 20, 2019.

Luca Callegaro (1967) holds a degree in Electronic Engineering (1992) and a Ph. D. in Physics (1996), both from Politecnico di Milano. He joined the Istituto Nazionale di Ricerca Metrologica, INRIM in Torino in 1996. His research interests are focused on electrical impedance; he is responsible of the Italian National standards of electrical impedance. He is chairman of the Technical Committee for Electricity and Magnetism (TC-EM) of EURAMET, the European Association of National Metrology Institutes. He is author of about 90 papers on international reviews and of the book Electrical impedance: principles, measurement and applications.