Judul: Evaluasi Teknis Dan Ekonomi Unit Penangkapan Payang Di Perairan Ulak Karang, Sumatera Barat
Abstrak: Payang termasuk alat penangkap ikan yang sudah lama dikenal dan banyak dioperasikan di Indonesia. Keberadaannya untuk perikanan laut Indonesia sampai tahun 2003 tetap dianggap penting, baik dilihat dari produktivitas maupun penyerapan tenaga kerjanya. Perairan Ulak Karang Sumatera Barat merupakan salah satu daerah penangkapan ikan yang banyak didatangi unit penangkapan payang, sehingga Ulak Karang terkenal sebagai daerah payang.
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Judul: Hasil Tangkapan Utama dan Sampingan Unit Penangkapan Payang di Palabuhanratu, Sukabumi
Abstrak: Penelitian ini dilakukan di lapangan dari tanggal 15 April 2004 sampai dengan tanggal 18 Mei 2004 di Teluk Palabuhanratu, dengan tujuan mengidentifikasi dan mengkuantifikasi hasil tangkapan utama (yaitu hasil tangkapan yang merupakan sasaran utama operasi penangkapan) dan hasil tangkapan sampingan unit penangkapan payang di Palabuhanratu untuk mengetahui tingkat keramahan lingkungan unit penangkapan ikan tersebut. Pengamatan langsung dilakukan dengan mengikuti 15 trip operasi penangkapan dan wawancara terhadap 20 orang nelayan payang. Selama penelitian diperoleh 35 spesies, terdiri dari kelompok ikan, moluska, coelenterata dan krustacea; spesies yang dilindungi hukum atau terancam punah tidak tertangkap. Tongkol dan cakalang adalah hasil tangkapan utama; perbandingan antara hasil tangkapan utama dan hasil tangkapan sampingan adalah 9: 1. Tidak semua individu hasil tangkapan utarna masuk kategori layak tangkap secara biologis; sekitar 43 % tongkol dan 56 % cakalang tergolong tidak layak tangkap. Sebagian besar hasil tangkapan dimanfaatkan oleh nelayan baik dengan cara dijual maupun dikonsumsi sendiri; hanya sebagian kecil hasil tangkapan (0,38 %) yang dibuang atau dikembalikan ke laut. Secara umum unit penangkapan payang Palabuhanratu memenuhi 4 dari 5 kriteria unit penangkapan ikan ramah Iingkungan yang digunakan, sehingga unit penangkapan ikan tersebut dapat dikatakan ramah lingkungan.
Keyword: Hasil tangkapan utama

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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