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  To Prof. André de Palma who made me stay in Paris after my Master Program;  to Saif. with whom we shared the desk at the E.N.S. Cachan office and without whom playing music at 7 P.M. while taking a break from work would not be fun otherwise;  to all the 7th Seventh  EU Framework Program SustainCity Project people.   To my international family: the Erasmus Mundus Program people who not only substituted my family but also perfectly complemented it, and in particular, to Alice for sending me nicely strong Karma coffee from the Laos mountains and lemongrass tea from Thailand to wind down from the coffee effect, to Esfandiar, to Yan, to my Kabutar Mina for millions "miss you", "miss you" words!, to my awe-inspiring friend Tara, and my Chinese little sister Guodi. This one’s for you. You probably know why.