For my loving girlfriend, Anne-Laure, who put up with entire weekends spent on my PC (while she spent her weekend on her laptop, sending me encouraging electronic messages). Thank you for supporting me when I should have been paying attention to you.

For my wonderful daughter, Eléna. Thank you for letting daddy work when I really should have spent more time playing with you, and despite what I might have said at the time, thank you for unplugging my computer when I ignored you for too long. Your smiles and first words are what powered me through the late nights and tight deadlines.