Judul: Forecasting of Economically Main Fish Catch Production in Indramayu
Abstrak: Jumlah produksi perikanan merupakan informasi penting dalam mengetahui kemampuan penyediaan perikanan dimasa yang akan datang. Ketersediaan ikan tidak menentu diperlukan sistem yang memprediksi kemampuan penyediaan ikan tersebut. Peramalan menjadi suatu kajian yang penting untuk memprediksi penyediaan stok. Indramayu merupakan salah satu daerah dengan jumlah produksi perikanan tertinggi di Jawa Barat. Penelitian ini bertujuan mendeskripsikan kondisi perikanan Indramayu secara umum, menentukan tiga ikan ekonomis di Indramayu, meramalkan tiga ikan ekonomis penting dengan menggunakan metode weight moving average dan eksponential smoothing dan menyarankan strategi peningkatan kinerja peramalan. Ikan tenggiri (Scomberomorus commerson), kembung (Rastreliger sp) dan kuniran (Upenus sulphureus) merupakan ikan ekonomis di Indramayu. Masing-masing ikan dilakukan perhitungan peramalan dengan metode weight moving average dan eksponential smoothing. Setiap metode dilakukan perhitungan uji kesalahan MAPE (Mean Absolute Percentage Error) dan MSE (Mean Square Error) untuk melihat nilai kesalahan hasil peramalan. Metode dengan nilai kesalahan terkecil ialah metode weight moving average ordo 4. Hasil estimasi jumlah produksi ikan tenggiri (Scomberomorus commerson) 22.402,87 ton mengalami penurunan dari tahun sebelumnya. Ikan kembung (Rastreliger sp) 8.825,52 ton mengalami peningkatan dari tahun sebelumnya. Ikan kuniran (Upenus sulphureus) 2.540,45 ton mengalami peningkatan dari tahun sebelumnya.
Keyword: Indramayu, rata-rata bergerak, pemulusan eksponensial, peramalan produksi ikan, Eksponential smoothing, fish volume production, Indramayu, weight moving average

Judul: Economic Analysis of Sustainable Management of Fisheries Effort in Indramayu Regency
Abstrak: As an archipelagic country, Indonesia has territorial water at 5,8 million km2 Method of this research are biological analysis, bio-economical model, economic interest analysis, economic intensity analysis, and strategic analysis with use analytical hierarchy process (AHP). Fish resources with potential and become main products of fishermen in Indramayu Regency Indramayu are manyung, tenggiri, peperek, kembung, and tongkol. The production of fifth fish species about 85,6 % from fish production total in territorial water of Indramayu Regency. Maximum stock capacities (MSY) of manyung, tenggiri, peperek, kembung, dan tongkol in territorial water of Indramayu Regency each are 1291,37 ton/year, 1120,70 ton/year, 4227,93 ton/year, 1135,76 ton/year, and 5343,58 ton/year. Maximum economic yield (MEY) of manyung, tenggiri, peperek, kembung, and tongkol in territorial water of Indramayu Regency each are Rp 16.471.401.174/tahun, Rp 31.745.619.591/tahun, Rp 54.907.433.923/tahun, Rp 9.911.840.550/tahun, and Rp 42.547.409.047/tahun. consisted about 17.504 islands and coastal line more 81.000 km with various of fish resource. According to DPK of Indramayu Regency (2010a), the production of sea fishery in Regency of Indramayu is stable at 2009 reaching 108.554,6 ton with value about Rp 1.383.687.650.000. That production must influence stock capacities of fish resources in fishing ground, so that its exploiting require to be controlled, inclusive maximum economic yield (MEY). The aim of the research to analyse stock capacities and maximum economic yield of fisheries resources, to analyse sustainability of fisheries effort, and to formulate the development strategic of sustainable economic based on fisheries effort in Indramayu Regency. Drift gillnet (JIH), set gillnet (JIT), payang, bottom long line, handline, dan shrimp gillnet (JK) can be laboured on an ongoing basis in Indramayu Regency. Economi interest of drift gillnet (JIH), set gillnet (JIT), payang, bottom long line, handline, dan shrimp gillnet (JK) each are Rp1.029.134.326, Rp 579.915.247, Rp 992.640.822, Rp 263.338.992, Rp 56.725.341, dan Rp 76.184.501. Return of return of drift gillnet (JIH), set gillnet (JIT), payang, bottom long line, handline, dan shrimp gillnet (JK) each are 42,01 %, 31,35 %, 56,72 %, 58,52 %, 66,74 %, dan 43,53 %. Development strategic of sustainable economic based on fisheries effort in Indramayu Regency from priority most important to less be important are ; (a) Repair of management of fisheries effort (RK = 0,255, II = 0,05), (b) Construction of human resources of fisheries sector (RK = 0,230, II = 0,05), (c) Development of capitalization cooperation (RK = 0,193, II = 0,05), (d) Development of scale small fisheries ( RK = 0,186, II = 0,05), and (e) Development of supporting units of fisheries effort (RK = 0,136, II = 0,05).
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Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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