Diffusion: Journal of Systems and Information Technology Department of Information System, Universitas Negeri Gorontalo Engineering Faculty Building, 1st Floor Jl. Prof. Dr. Ing. B. J. Habibie, Bone Bolango, Gorontalo, 96119, Indonesia Phone: +62 (435) 821125, Fax: +62 435 821752 Email: diffusion.jurnal@ung.ac.id