^pEngineering;
Department,;
Faculty;
of;
Engineering,;
Semarang;
State;
University,;
Semarang;
50229,;
Indonesia;
^pEngineering;
Department,;
Gadjah;
Mada;
University,;
Yogyakarta;
55281,;
Indonesia;
^pDepartment,;
Gadjah;
Mada;
University,;
Yogyakarta;
55281,;
Indonesia;