Judul: Perikanan payang di pemakasan Madura : kajiaan teknik dan bionomi statis
Abstrak: Pengembangan di bidang perikanan bertujuan untuk meningkatkan pendapatan dan kesejahteraan masyarakat nelayan dengan tetap menjaga kelestarian sumberdaya ikan. Salah satu usaha yang dapat dilakukan adalah usaha penangkapan menggunakan unit penangkapan payang.
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Judul: Perikanan payang di kotamadya padang
Abstrak: Tujuan penelitian ini adalah untuk Mempelajari perikanan payang di Kodya Padang. Univers Penelitian ini dilaksanakan di Kodya Padang, Propinsi Sumatera Barat. Waktu penelitian terhitung mulai tanggal 11 Agustus sampai tanggal 30 September 1985. Metode yang dipakai dalam penelitian ini adalah merupakan studi kasus.. Analisa data berdasarkan analisa "Break- Even" dan "B/C ratio". Pengembangan alat tangkap, didekati berdasarkan produksi dan nilai produksi tahunan, biaya investasi, biaya tetap, biaya tidak tetap dan potensi lestari. sumberdaya. Potensi sumberdaya perikanan laut di Propinsi Sumatera Barat diperkirakan masih besar, potensi lestari ikan pelagis kecil 35 464,9 ton per tahun, ikan pelagis besar 11 915,9 ton per tahun dan ikan karang/demersal 24 078,6 ton per tahun. Berarti tingkat pengusahaan pada tahun 1984, baru mencapai 42,48 persen untuk ikan pelagis kecil, 82,84 persen untuk ikan pelagis besar dan ikan karang/demersal 13,44 persen. Unit penangkapan payang terdiri dari perahu kayu, mempunyai nilai gross tonage berkisar 1,32 ton sampai 2,20 ton, material jaring payang terbuat dari bahan sintetis, warna jaring coklat. Daerah penangkapan nelayan meliputi perairan laut Kodya Padang dengan jarak tiga mil sampai lima mil dari pantai. Hasil tangkapan dengan alat tangkap payang adalah, ikan tongkol (Euthynus sp), tembang (Sardinella fimbriata), kembung (Rastrelliger sp), layang (Decapterus sp), selar (Caranx sp) dan beberapa jenis ikan lainnya. ...
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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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