1. Laboratory of Electronic Microscopy and Materials Science, Physics Department, Faculty of Science, University of Science and Technology of Oran Mohamed-Boudiaf, BP 1505 El M’Naouar, Bir El Djir 31100, Oran, Algeria.
2. Department of Physics, Faculty of Sciences. Ferhat Abbas Sétif University 1, Sétif 19000, Algeria.
3. Laboratory of Gender Studies and Sociolinguistics, English Departement, Faculty of Forgeign L anguages, Abdelhamid Ibn Badis University, Mostaganem, Algeria.