Welcome to Volume 15, Number 4 of TOJDE

From Editor

Welcome to the volume 15 Number: 4 of TOJDE, In this issue, one article in “Note for Editor“ section and 22 articles of 43 authors from 14 different countries around the world have been published. These published articles are arrived to the TOJDE from Bangladesh, Brazil, Canada, Greece, India, Indonesia, Iran, Pakistan, Russia, South Africa, Tanzania, Thailand, Turkey and USA.