Judul: Rancang Bangun mini Remotely Operated Vehicle (ROV) untuk Eksplorasi Bawah Air.
Abstrak: Penelitian dilaksanakan pada bulan Maret 2011 hingga bulan Maret 2012. Perancangan dan pembuatan instrumen dilakukan di Laboratorium Instrumentasi Kelautan, Departemen Ilmu dan Teknologi Kelautan, Institut Pertanian Bogor. Penelitian ini dilaksanakan dengan tujuan untuk membuat mini Remotely Operated Vehicle (ROV) dan menguji kinerjanya di dalam air. Penelitian ini dilaksanakan untuk mengatasi kekurangan yang ada pada ROV RJ45 yang dibuat oleh Rizki dan Prihandono (2008). Kekurangan yang terdapat pada RJ45 antara lain rangka yang terlalu berat, kekuatan motor yang tidak cukup untuk menggerakkan ROV, adanya panas berlebih pada kompartemen utama, dan kurangnya sensor pendukung di dalamnya. Alat yang dirancang merupakan robot bawah air yang dapat melakukan manuver di dalam air. mini ROV yang dikembangkan memiliki dimensi total panjang 80 cm, lebar 62,5 cm, dan tinggi 62,5 cm. mini ROV ini terdiri dari beberapa unit fungsional yang secara keseluruhan terpadu dalam satu mikrokontroler ATmega32A. Mini ROV ini memiliki “mata” yang menggunakan sensor kamera (dengan keluaran berupa video) yang berfungsi untuk melihat kondisi di dalam air. Pengukuran arah mini ROV menggunakan sensor kompas digital CMPS10 yang dapat menentukan arah hingga 360° dengan ketelitian 0,1°. Penentuan sudut pitch dan roll juga menggunakan sensor CMPS10. Sudut pitch dan roll yang diperoleh memiliki rentang (-90°) – (+90°) dengan ketelitian 1,4°. Pada mini ROV ini juga disematkan sensor accelerometer H48C untuk melihat gaya gravitasi yang bekerja pada sumbu X, sumbu Y, dan sumbu Z dengan ketelitian 0,1 g. Suhu di dalam pipa utama diukur dengan menggunakan sensor suhu DS1820. Perancangan mini ROV dipadukan dalam beberapa proses perancangan yaitu pembuatan desain, perancangan konstruksi mekanik, perancangan konstruksi elektronik, dan desain piranti lunak sehingga tahapan terakhir adalah integrasi dari keseluruhan proses perancangan tersebut. Hasil integrasi ini berupa bentuk fisik mini ROV, sistem elektronik, dan program antarmuka grafis. Mini ROV ini diberi nama “RJ45 V2” sebagai pengembangan ROV RJ45 yang telah dibuat.
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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: Enhancement of photon absorbtion on BaxSr1-xTiO3 thin films semiconductor using photonic crystals.
Abstrak: In this research, has been conducted BaxSr1-xTiO3 (BST) thin films manufacturing for mole fraction x = 0.25, 0.35, 0.45, and 0.55; and concentration of 1 molar using chemical solution depositon (CSD) method. The materials, which are used in this research, are barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%], titanium isopropoxide [Ti(C12O4H28), 97.999%], gallium trioxide [Ga2O3], 2-methoxyethanol [H3COOCH2CH2OH, 99%] and 1 x 1 cm of transparent conductive oxide (TCO) glass as substrate. Two BST thin films are made that for BST thin films which are doped by 10% galium (BGST) as p-type layer and pure BST solution as n-type. BST solution is made by reacting barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%] and titanium isopropoxide [Ti(C12O4H28)] into 2-methoxyethanol solvent [H3COOCH2CH2OH, 99%] in accordance with mass gram for each x value. While, BGST solution is made in the same way as BST solution, plus adding gallium at 10% of the mass of BST. Once all materials are reacted, then vibrated using ultrasonic for 90 minutes, and followed by coating BGST / BST on the TCO substrate. Once the layer is formed, then annealed for 15 hours at temperature of 500 °C with increasing rate of 1.67 oC/minute. Characterizations of BST thin films with or without photonic crystals include the absorbance and transmittance in the visible light spectrum, as well as the electrical photoconductivity characterizations. From BST thin films without photonic crystals indicate that our thin films have light absorption area on almost the entire range of the visible light spectrum even to the infrared range with absorption value over than 67.6%, in addition, it can be seen that the maximum absorbance of BST thin films for all mole fractions lie in blue to green light spectrum region, 457 nm ≤ λ ≤ 570 nm and the minimum in yellow to red light spectrum region, 570 nm ≤ λ ≤ 678 nm. The largest absorbance is found at x = 0.25 with average absorbance value of 92.04% and maximum and minimum absorbance peaks at wavelength of 500.89 and 657.72 nm, respectively. At x = 0.35, average absorbance value decreased to 83.55% with maximum and minimum peaks at 505.73 and 613.68 nm, respectively. Then increased to 91.16% at x = 0.45 with maximum and minimum peaks at 506.04 and 618.56 nm, respectively. At x = 0.55, average absorbance value decreased to 80.12% with maximum and minimum peaks at 507.85 and 608.79 nm, respectively. Moreover, it can be seen that the addition of barium mole fraction leads to wider maximum absorbance or minimum transmittance peaks and narrower minimum absorbance or maximum transmittance peaks in the same range of the green and blue & red light spectrums, respectively. BST thin films with photonic crystals show increasing in absorption for all x values in the range of 3.04 into 13.33%. At x = 0.25, average absorbance percentage increased 3.96% from 92.4 into 95.68%, for x = 0.35 average percentage increased 7.07% into 89.45 from 83.55%. Furthermore, average absorbance of BST thin films at x = 0.45 increased 3.04% from 91.16 into 93.93% and x = 0.55 has
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