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Dedication
I dedicate this modest work:
To my family, she who doubted me of a dignified education, her love made me
what I am today:
To man, my precious offer of god, who owes my life, my success and all my
respect: my dear father Mohammed
To the woman who suffered without letting me suffer, who never said no soul
demands and spared no effort to make me happy: my adorable mother Karima
To my dear brother Hamada and my dear sister Racha and my fiancé Fares who
have not ceased to advise me, encourage and support me throughout my studies,
May God protect them and offer them luck and happiness
To my dear Aunt Bey Farida who always knows how to bring joy and happiness
to the whole family
In memory of my dear grandfathers and grandmothers
To my dear friends Bensaada Meriem , Chelabi Amel and Izem Yasma , Dellil
Imene and Seffaf Rafika
Without forgetting my dear partner “Rouabhia Hadjer” for his moral support,
patience and understanding throughout this project
To all the cousins, neighbors and friends I’ve known so far
«Thank you for their love and encouragement»
Lairedj Nawal El Batoul