Oke, M A, Bells University of Technology, Ota, Ogun State, Nigeria
Onistia, Welsa Okta, Department of Research and Development, P.T. Dimonitor Indonesia Sejahtera, Surakarta, Indonesia
Onyshchenko, Svitlana
Oryzanandi, Seraf Steva, Mechanical Engineering Program, Faculty of Engineering, Universitas Sebelas Maret, Jalan Ir. Sutami 36A, Kentingan, Surakarta 57126, Indonesia