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-\chapter*{Remerciements}
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+\chapter*{Acknowledgements}
+
+In this document, I discuss the results of a successful decade of work.
+However, my main achievement in this period is my family.
+I met my wife Milena, our son Jimmy was born, and we got married.
+We are all here for the other when one needs help or attention, whether to get through difficult times or to celebrate the highlights.
+I love you both more than anything else in this universe.
+The true achievement of my career is certainly my ability to keep a good work-life balance.
+
+I am also grateful to my parents Paul and Chantal, as well as my brother Julien.
+They always supported me and there was no chance I was there today without them.
+I also thank the rest of my family and my step-family for providing a kind and warm environment.
+It is always a pleasure to have a good time together.
+
+I also have the chance to have the most faithful and cheerful friends one hopes to have.
+They are always ready to hang around, help, or do anything else one of us needs.
+The frontier between friends and colleagues is sometimes difficult to draw.
+I am so grateful to the Telecom team that welcomed me for my postdoc in Paris.
+You helped me to take off my research, and we spent many good moments both in and outside the lab.
+You all are one of the reasons why I achieved this step today, and I am proud to count you as a friend as well.
+
+Throughout my postdocs in Paris, Toronto, and my position at the Univerité de Lille I had the honor and pleasure to work with many talented people.
+These stimulating environments pulled me to the heights I reached today.
+I was delighted to share this part of my journey with you.
+Notably, I owe a life debt to all my team leaders: Éric, Ravin, Laurent, Nicolas, and Stéphane.
+Not only you all provided me with an outstanding environment that helped me to perform research at the highest levels and helped me to shape my vision of my research.
+But thanks to you the day I will lead a team myself, I will have five different leadership examples to get inspiration from.
+In particular, I truly thank Stéphane for being my HDR sponsor.
+He was for me the best person to guide me through this exercise, and in particular, push me to go further in my thinking.
+
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+
+All these welcoming and successful research environments are also combinations of very talented researchers.
+The ideas and visions presented in this document are the consequences of discussions, teamwork, and inspiration from my direct and indirect collaborators.
+Specifically, I thank my most frequent co-authors Géry, Nicolas, Sylvain, and Gilles, and most frequent co-advisors Audrey and Marcelo.
+More generally, I express my deepest gratitude to all my co-authors and more generally all the other team members and members of the HCI research community.
+
+
+Beyond the research teams, I have been working in stimulating and welcoming environments, whether in the Computer Science department of the Faculté des Sciences et Technologies, the Inria Lille research center, or the CRIStAL laboratory.
+I thank them all.
+I would also like to give a special thanks to all the support teams at Inria, and more than anybody else our team assistants Karine, Julie, and Anne.
+Without talented, organized, and kind people like you, our job would not be possible.
+
+I would like also to thank all the committee members for accepting to review my work.
+All of you inspired my research since I started research 17 years ago.
+Therefore, it is an honor for me to be able to present to you what I have been working on during the last decade.