Judul: Studi tentang Desain Kapal Purse Seine di Eretan Wetan, Indramayu
Abstrak: Kapal merupakan salah satu sarana terpenting dalam usaha penangkapan ikan. Berhasil tidaknya usaha penangkapan, kapal harus mempunyai beberapa persyaratan yang berkaitan dengan desain dan kontruksinya. Kapal ikan yang beroperasi di Indonesia sebagian besar masih di bangun di galangan kapal tradisional dan tanpa adanya desain sebelumnya, serta belum mengikuti aturan-aturan yang dibuat oleh BKI (Biro Klasifikasi Indonesia). Sehingga penggunaan dan fungsi sebuah kapal perikanan belum optimal dan efisien.
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Judul: Desain dan Konstruksi Kapal Purse Seine "Semangat Baru" di Galangan Kapal Pulau Tidung
Abstrak: Pembangunan kapal ikan di Indonesia pada umumnya dilakukan secara tradisional, tanpa diketahui dengan gambar desain dan perhitungan serta hanya mengandlkan kemampuan turun temurun dan bukan berdasarkan fungsi dan peruntukkannya. Tujuan penelitian ini adalah (1) Mendokumentasikan cara pembuatan kapal purse seine di galangan kapal tradisonal ulau tidung; (2) Membuat gambar teknik bagi kapal tersebut (gambar rancangan umum, rencana garis dan rencana konstruksi); (3) Mendapatkan nilai parameter hidrostatik kapal purse seine tersebut. Proses mendesain kapal merupakan salah satu tahapan dalam pembuatan kapal. Hasil pengukuran di lapangan di dapat ukuran utama kapal yaitu panjang total (LOA) 1606 m, lebar (B) 4,60 m dan dalam (D) 1,43m. Material kayu yang digunakan bermacam-macam diantaranya adalah kayu ulin (Kusideroxylon zwageri), meranti (Shorea acurinata) dan kamper (Prybalanops lacnceolata). Pembuatan kapal ikan diperlukan konstruksi yang kuat, karena dalam operasi penangkapan ikan, kapal ikan harus tetap dapat dioperasikan dalam kondisi cuaca apapun. Ukuran balok konstruksi yang digunakan masih di bawah ukuran yang ditentukan oleh Biro Klasifikasi Indonesia
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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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