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: Toksisitas Kontak dan Efek Fumigan Minyak Atsiri Cinnamomum spp. (Lauraceae) terhadap Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)
Abstrak: One of the stored product pests which can reduce the quantity and quality of stored products is the flour beetle Tribolium castaneum. Stored-product pests are commonly controlled by fumigation and surface spraying using contact insecticides which can cause various harmful side effects. Essential oils of Cinnamomum spp. constitute safer alternatives for controlling stored product pests. This research was done to determine the contact toxicity and fumigant effect of essential oils of eight species of Cinnamomum and a commercial cassia oil against T. castaneum. A commercial insecticide containing alpha-cypermethrin was included for comparison. Only a commercial cassia oil had a fairly strong contact and fumigant effect, i.e. the treatment with 5% cassia oil caused 75% and 70% mortality, respectively. The other test essential oils were not active to weakly active against T. castaneum. Cassia oil and alpha-cypermethrin acted fairly fast, i.e. test insect mortality mostly occurred at 24 hours after treatment (HAT) and in the next 48 hours only a slight increase in insect mortality was noted. LC50 of cassia oil at 72 hours after treatment by contact and fumigant method was 4.73% and 3.12% respectively. Alpha-cypermethrin had relatively weak lethal effect by contact method and no fumigant effect at concentrations up to 10% but had strong knockdown effect at 5% and 10% by contact method.
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