Judul: Rancang bangun Prototipe Remotely Operated Vehicle bawah air: aspek sistem kendali elektronik
Abstrak: ROV (Remotely Operated Vehicle) sebagai wahana observasi bawah air sangat dibutuhkan keberadaannya dalam bidang kelautan. Belum adanya ROV buatan domestik di Indonesia mendorong perlunya dikembangkan instrumen ini. Penelitian ini ditujukan untuk membuat sistem kendali gerak dan h g s i otomatik bagi sistem wahana terpadu ROV dengan perangkat lunak dan mikrokontroler serta akuisisi data visual berupa video sebagai model dasar sistem monitoringjsh shelter dengan ROV. Pembuatan sistem kendali dilakukan melalui tiga tahap yaitu perancangan perangkat lunak, pembuatan perangkat keras dan penyatuan (integrasi) perangkat lunak dan perangkat keras. Perangkat lunak yang dibuat mencakup program pengendalian gerak ROV melalui kendali mikrokontroler AVR ATMega8535 dengan bahasa BASIC, pembuatan antarmuka pengguna grafis dan pengendalian perangkat keras secara serial dengan Borland Delphi 7. Pembuatan perangkat keras ditujukan untuk pengendalian thruster motor DC dengan mikrokontroler dan perangkat kamera CCD untuk pengarnbilan data visual. Hasil pembuatan antarmuka cukup baik dimana fungsi GUI seperti layar monitor, indikator gerak dan fungsi berjalan dengan baik namun sinkronisasi keja antara gerak joystik terhadap motor masih kurang,berjalan dengan baik karena sistem komunikasi serial RS-232 kurang sesuai untuk transmisi data jarak jauh. Secara umum perancangan sistem kendali ROV berjalan dengan baik dan mampu melakukan pengambilan data visual. Selanjutnya sistem ini perlu dilengkapi dan dikembangkan untuk lebih mengoptimalkan fungsinya dan memungkinkan pengkhususan kerja
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Judul: Pengembangan Robot Jelajah Bawah Air (RJBA V. 2014) untuk Eksplorasi Bawah Laut
Abstrak: Remotely Operated Vehicle (ROV) is an underwater robotic vehicle that able to perform the underwater movement controlled from the surface via thetered cable and connected to the control system. The purpose of ROV is to observe and work underwater in accordance with the function of making of the robot itself. The ROV V. 2014 is improvement of the previous ROV developed by the Department of Marine Sciences and Technology, Bogor Agricultural University. The ROV V. 2014 has improved power supply system, thrust system, ballast system, and gripper systems. The making of a ROV is divide into four parts : design, programming, electronics, and mechanical/hardware. This new generation of underwater vehicle has dimensions of 65x35x40 cm, total weight ± 19kg, a system of ballasts with ballast tank 14.879 dm3 volume of space, a wide opening claw gripper with a maximum diameter of 8 cm, and 5 thrusters to move the robot horizontally and vertically, thetered cable of the 28 meter long to the surface and joystick to control the maneuver of the vehicle.
Keyword: joystick, thruster, gripper, ballast system, ROV

Judul: Waxes, policosanols and aldehydes in sugarcane (Saccharum officinarum L.) and okinawan brown sugar (kokuto)
Abstrak: Waxes, long chain alcohols and aldehydes were found in several variants of sugarcane (Saccharum officinarum L.) and Kokuto, a non-centrifuged Okinawan cane brown sugar. Long chain alcohols, policosanols, have been reported to have beneficial effect to human health. The composition of wax in sugarcane was analyzed using HPLC with an evaporative light scattering detector. Sugarcane wax composed of 55–60% aldehydes, sterol esters and wax esters, 32–40% alcohols, and small amounts of triacylglycerols, acids and sterols. Extraction of policosanols performed effectively with hexane and methanol (20:1 v/v), while that of long chain aldehydes was with chloroform and methanol (2:1 v/v). Their composition was determined using GC with a flame ionization detector, whereas their compounds were identified using GC-MS. Sugarcane rinds contained up to 500 mg policosanols and 600 mg aldehydes per 100 g sample of Ni 22 cultivar. The content of policosanol and long chain aldehyde in Kokuto was influenced by its production systems. Compositional analysis of the end product confirmed the presence of policosanols and aldehydes up to 85 mg and 8 mg respectively per 100 g sample of Kokuto A, a product of brown sugar manufacture with open pan heating system. Octacosanol and octacosanal were found to be the major wax components in both sugarcane and Kokuto samples. This study revealed significant difference in content and composition of waxes, policosanols and long chain aldehydes between sugarcane parts, cultivars and harvesting times; also between Kokuto types and production methods.
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