Judul: Analisis Mata Pencaharian Alternatif Nelayan Pancing di Kepulauan Seribu
Abstrak: Nelayan pancing di Kepulauan Seribu menggunakan lima jenis pancing yaitu pancing tongkol, pancing tenggiri, pancing ulur, pancing tonda, dan pancing parabola. Penelitian ini bertujuan untuk mendeskripsikan unit penangkapan pancing dan menentukan pendapatan nelayan dari kegiatan penangkapan dan mata pencaharian alternatif yang dilakukan nelayan pancing di Kepulauan Seribu. Hasil analisis unit penangkapan ikan menunjukan bahwa nelayan menggunakan lima jenis pancing hal ini disesuaikan dengan hasil tangkapan. Ada enam mata pencaharian alternatif yang dilakukan nelayan pancing di Kepulauan Seribu. Mata pencaharian tersebut adalah usaha budidaya kerapu, usaha penangkapan udang pengko (udang ronggeng), penyewaan kapal, usaha warung, tukang bangunan, dan usaha perbaikan mesin kapal. Berdasarkan hasil analisis usaha diperoleh rata-rata pendapatan nelayan dari kegiatan usaha penangkapan pancing sebesar Rp2.684.677,- per bulan. Kegiatan mata pencaharian alternatif yang dilakukan meningkatkan pendapatan nelayan sebesar 20,90% per bulan. Hasil analisis usaha menunjukan usaha penangkapan pancing dan mata pencaharian alternatif memiliki nilai revenue-cost ratio >1. Hal ini menunjukan bahwa semua usaha yang dilakukan oleh nelayan mendatangkan keuntungan dan layak untuk dikembangkan. Kegiatan mata pencaharian alternatif harus dikembangkan lebih lanjut untuk meningkatkan kesejahteraan nelayan
Keyword: Seribu Archipelago, alternative livelihood, line-fishers

Judul: Analisis mata pencaharian alternatif nelayan gillnet di Desa Batukaras, Kecamatan Cijulang, Pangandaran, Jawa Barat
Abstrak: Fishermen in Batukaras generally using bottom set gillnets. Activities of fishing operations using the hunting system and depend on the season. The purpose of this study is to describe the gillnet fishing unit and analyze the work done by the fishermen, both fisheries and alternative livelihoods (non-fisheries). The method of this research using survey methods and data collection techniques by purposive sampling. Analysis of the data used in the form of analysis of fishing unit and financial analysis that includes the analysis of income and revenue cost ratio (R/C). The results of the analysis of fishing unit showed that gillnet construction consist of buoys, head and ground ropes, net body, neck strap, and sinker. Gillnet was operated by 2-3 fishermen using the boat which its length (L) 9.00 meters, breadth (B) of 1.50 meters, and depth (D) 1.00 meters. The work done by gillnet fishermen is fisheries effort and alternative livelihoods. Based on the financial analysis has result that average of fishermen income is Rp 693.297 per month and the value of R/C of 1.31 (R/C> 1), so fisheries effort is profitable and feasible to be developed. alternative livelihoods undertaken by the fishermen including agriculture, albizia wood cultivation, collecting firewood, collecting coconuts, used goods sellers, kiosk, and gardening cardamom. Based on the financial analysis has result that average of alternative livelihoods is Rp 445.347 per month and the value of R/C obtained from all alternative livelihoods is more than one, so the alternative livelihoods businesses profitable and feasible to be developed. This is supported by the result of the pattern of business implementation, in which all alternative livelihood done on famine and moderate, so it does not interfere the main work of the fishermen.
Keyword: Bogor Agricultural University (IPB), gillnet fishermen business, financial analysis, gillnet, Batukaras Village

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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