Orpa, Refat Tasfia, Hajee Mohammad Danesh Science and Technology University (Bangladesh)
Ortecho, Leonardo Ledesma, Universidad Tecnologica del Perú (Peru)
Ortega, Jairo Cuero, Universidad de los Llanos (Colombia)
Ortega-Gonzalez, Lilia, Universidad de la Costa (Colombia)
Ortjohann, Egon, South Westphalia University of Applied Sciences Soest, Germany (Germany)
Orynbayeva, Ainur, Astana Medical University (Kazakhstan)
Osaghae, Etinosa Noma, Covenant University (Nigeria)
Osama, Amira, High Institutes for Engineering and Technology Al-obour (Egypt)
Osemwegie, Omoruyi, Covenant University (Nigeria)
Oshanova, Nurzhamal, Kazakh National Pedagogical University named after Abai (Kazakhstan)
Oshiga, Omotayo, Nile University of Nigeria (Nigeria)
Oshita, Angel, Universidad Peruana de Ciencias Aplicadas (Peru)
Osi-Okeke, Tochukwu, Afe Babalola University (Nigeria)
Osichev, Aleksandr, National Technical University "Kharkiv Polytechnic Institute" (Ukraine)
Oskoei, Mohammadreza Asghari, Allameh Tabataba’i University (Iran, Islamic Republic of)

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