Second video for the Italian Samurai initiative in the context of Italian Research Day 2021. Ruggero Micheletto is a Professor at Yokohama City University. In Japan since 1994 Lab Home Page: http://ruggero.sci.yokohama-cu.ac.jp/CV: http://ruggero.sci.yokohama-cu.ac.jp/member/ruggero.phpPublications: http://ruggero.sci.yokohama-cu.ac.jp/data/paplist.php