Contact

Dr. Rizal Arifin

Department of Mechanical Engineering,

Universitas Muhammadiyah Ponorogo,

Jl. Budi Utomo No.10 Ponorogo.

East Java, 63471 Indonesia

Email: rizal.arifin@gmail.com

rarifin@umpo.ac.id

Phone (Cell): (+62) 857 0825 3406