1. Universitas PGRI Semarang,Faculty of Engineering and Informatics,Department of Informatics,Semarang,Indonesia
2. Universitas PGRI Semarang,Postgraduate Program of Science Education,Semarang,Indonesia
3. School of Computing Science & Engineering, Galgotias University,Greater Noida,India
4. ABES Engineering College,Department of Computer Science & Engineering,Ghaziabad,Uttar Pradesh,India,201009