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First Author:
 
Karim Barkat
Qatar University
barkat.karim@hotmail.fr
 
CBE, Qatar University
Doha, 2713, Qatar
 
 
 

Second Author:

Zouhair Mrabet
Qatar University
mrabet2879@yahoo.fr
 
 
 
 

Third Author:

Mouyad Alsamara
Qatar University
mouyadsamara@gmail.com