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    \textit{``I would like to express my deepest gratitude to my supervisor, Professor Giovanni Malnati, for his invaluable guidance and support throughout this project. His expertise and encouragement were instrumental in the completion of my thesis. I also wish to extend my heartfelt thanks to my friends and family for their unwavering support and understanding during this journey. Their encouragement and patience provided me with the strength and motivation to persevere.''\\
    Arash Honarvar, Turin, October 2024}
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