Faktor risiko gangguan pendengaran karena pajanan bising pada sektor informal juru mudi perahu mesin tempel jurusan Belakang Padang-Sekupang Batam tahun 2013 = Risk factors for hearing loss due to noise exposure in the informal sector helmsman outboard engine boat Belakang Padang-Sekupang Batam in 2013

Perancangan dan pengembangan prototype real-time electronic engine control unit untuk mesin otto lfce 1 silinder 65 CC = Design and development of prototype real time electronic engine control unit for 1 cylinder lfce otto engine / Randy Rahmandar

Perancangan dan Pengembangan Connecting Rod dan Crankshaft Mesin Otto Satu Silinder Empat Langkah Berkapasitas 65cc = Design and Development Connecting Rod and Crankshaft of Four Stroke Internal Combustion Engine with 65cc Capacity

Perancangan dan pengembangan lanjut mesin otto satu silinder empat langkah berkapasitas 65 cc = Advanced design and development of four stroke internal combustion engine with 65 cc capacity

Perancangan dan pengembangan struktur eddy current chassis dynamometer berkapasitas 13 kw untuk pengujian mesin otto empat langkah berkapasitas 65 cc = Design and development structure of eddy current chassis dynamometer capacity 13 kw for test otto engine four cycle 65 cc