Judul: Studi tentang desain beberapa jenis kapal ikan di perairan pantai Jawa Timur
Abstrak: Usaha perikanan laut di Indonesia didominasi oleh usaha perikanan tradisional dengan menggunakan kapal ikan yang berukuran kurang dari 10 GT. Usaha ini memberikan kontribusi terhadap produksi total perikanan Indonesia sebesar 98 persen. Peranan kapal ikan semakin meningkat dengan adanya motorisasi, khususnya di perairan pantai Utara Jawa. Tujuan penelitian ini adalah untuk melakukan evaluasi terhadap desain kapal ikan tradisional di wilayah perairan pantai Lamongan, Situbondo dan Pacitan, Jawa Timur, dari bulan Desember 1988 sampai dengan bulan Januari 1989. Penelitian dilaksanakan dengan melakukan pengamatan langsung serta wawancara dengan pembuat perahu maupun nelayan pemilik. Pemilihan contoh berdasarkan pertimbangan bahwa kapal yang bersangkutan memiliki kontribusi besar terhadap produksi total, memiliki karakteristik yang mewakili jenis perahu yang terpilih untuk masing-masing lokasi penelitian. ...
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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: 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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