Cube Complexes and Virtual Fibering of 3-Manifolds.

Una 3-varietà si dice virtualmente fibrata se ammette un rivestimento finito che è un fibrato con base una circonferenza e fibra una superficie. In seguito al lavoro di geometrizzazione di Thurston e Perelman, la generica 3-varietà risulta essere iperbolica; un recente risultato di Agol afferma che una tale varietà è sempre virtualmente fibrata. L’ingrediente principale della prova consiste nell’introduzione, dovuta a Wise, dei complessi cubici nello studio delle 3-varietà iperboliche. Questa tesi si concentra sulle proprietà algebriche e geometriche di queste strutture combinatorie e sul ruolo che esse hanno giocato nella dimostrazione del Teorema di Fibrazione Virtuale.

A proposal for a virtual museum of computer science

A proposal for a virtual museum of computer science

Virtual sensing technology applied to a swarm of autonomous robots.

This thesis proposes a novel technology in the field of swarm robotics that allows a swarm of robots to sense a virtual environment through virtual sensors. Virtual sensing is a desirable and helpful technology in swarm robotics research activity, because it allows the researchers to efficiently and quickly perform experiments otherwise more expensive and time consuming, or even impossible. In particular, we envision two useful applications for virtual sensing technology. On the one hand, it is possible to prototype and foresee the effects of a new sensor on a robot swarm, before producing it. On the other hand, thanks to this technology it is possible to study the behaviour of robots operating in environments that are not easily reproducible inside a lab for safety reasons or just because physically infeasible. The use of virtual sensing technology for sensor prototyping aims to foresee the behaviour of the swarm enhanced with new or more powerful sensors, without producing the hardware. Sensor prototyping can be used to tune a new sensor or perform performance comparison tests between alternative types of sensors. This kind of prototyping experiments can be performed through the presented tool, that allows to rapidly develop and test software virtual sensors of different typologies and quality, emulating the behaviour of several hardware real sensors. By investigating on which sensors is better to invest, a researcher can minimize the sensors’ production cost while achieving a given swarm performance. Through augmented reality, it is possible to test the performance of the swarm in a desired virtual environment that cannot be set into the lab for physical, logistic or economical reasons. The virtual environment is sensed by the robots through properly designed virtual sensors. Virtual sensing technology allows a researcher to quickly carry out real robots experiment in challenging scenarios without all the required hardware and environment.

Song of the sea: proposta di sottotitolaggio e fansubbing a confronto

The aim of this thesis is to subtitle and analyze the subtitles of the animation movie directed by the Tomm Moore, Song of the Sea. It deals with the adventures of Saoirse, the last of the selkies, the mythological women who turned into seals, and his brother Ben to save the fairies and send them home. Although Italy is a “dubbing country”, I decided to subtitle the film not to affect the original audio track, as the Irish accent and Celtic melodies are a fundamental element in Song of the Sea. I chose this movie because it is a quality product (nominated in 2015 for "The Best Animation Movie”) which deserves to be commercialized outside film festivals. In a second phase, I analyzed my subtitles and compared them to amateur subtitles, created by the SRT Project group, to understand the strategies adopted and the basic differences between the two types of subtitling. My dissertation consists of three chapters. The first provides a general overview of audiovisual translation and language transfer methods, focusing on subtitling. The second chapter introduces the movie in an Irish context, and then analyzes the subtitling process, from the software used, to the translation strategies adopted. Finally, the third chapter describes the phenomenon of amateur subtitling, and the most important Italian communities of the current years. Moreover, I analyzed SRT Project fan translation, and asked them a set of questions about amateur subtitling and the translation of Song of the Sea, in order to understand this world and the fansubbing process. The Appendix includes my subtitles, as well as the questionnaire.