1. Universitas PGRI Semarang,Department of Mechanical Engineering,Semarang,Indonesia
2. Universitas PGRI Semarang,Department of Informatics,Semarang,Indonesia
3. Universitas Diponegoro,Department of Mechanical Engineering,Semarang,Indonesia
4. Universitas PGRI Semarang,Department f Physics Education,Semarang,Indonesia
5. Universitas Setia Budi,Department of Pharmacy,Surakarta,Indonesia