Judul: Analisis Biaya dan Kelayakan Usaha Penggilingan Padi di Kelurahan Situ Gede, Kecamatan Bogor Barat.
Abstrak: One important aspect of post-harvest handling of rice is rice milling. Although many rice milling unit, but deployment and their feasibility has not so optimal.This situation requires an evaluation and needs analysis to assess the optimum level making it feasible to operate profitably. The research objective is to create a cost analysis and feasibility of rice mills and to make sensitivity analysis on several conditions. The study was conducted for 3 months, from May 2010 until July 2010. Using Mr Kardi’s rice milling unit as an objects for the research where located at Situ Gede Village in West Bogor. Based on the calculation of the cost analysis, obtained total cost rice mill for a year is Rp. 37,033,093.194. Main cost produced per kilogram of rice at Rp. 283.8. Breakeven point values obtained for rice mills is 139.19hours / year or 35,342.784 kg of paddy / year. In addition, based on sensitivity analysis, obtained value net present value (NPV) is Rp. 168,628,529.933, the internal rate of return (IRR) is 40.11, and the gross value of B / C ratio is 1.50. Based on that results, we can conclude Kardi’s rice mill unit is feasible to run. After that, a sensitivity analysis was performed on several conditions that may occur. The selected conditions is rising diesel fuel prices, rising labor wage, and decrease the amount of annual milled. After calculating the sensitivity analysis, obtained some conditions which may cause the rice mill is not feasible to run.
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Judul: Analisis Biaya dan Kelayakan Usaha Penggilingan Padi di Kecamatan Karanganyar, Kabupaten Pekalongan
Abstrak: Penggilingan padi adalah salah satu tahapan pascapanen yang tediri dari rangkaian beberapa proses untuk mengolah gabah menjadi beras siap konsumsi. Tujuan penelitian ini adalah untuk menganalisis biaya dan kelayakan usaha penggilingan padi, menganalisis sensitivitas biaya terhadap beberapa kondisi, dan membandingkan dua unit penggiligan padi. Analisis biaya berupa biaya tetap, biaya tidak tetap, biaya total, biaya pokok, dan titik impas. Kelayakan finansial ditentukan melalui kriteria Net Present Value (NPV), Internal Rate of Return (IRR), dan Benefit Cost Ratio. Hasil analisis menunjukkan bahwa penggilingan padi milik Bapak H. Sukadi (A) layak untuk dijalankan karena mempunyai NPV sebesar Rp 160,396,218.56, IRR sebesar 44.237%, dan B/C ratio sebesar 1.557 atau memenuhi syarat NPV > 0, IRR ≥ discount rate (7%), dan B/C ratio > 1. Penggilingan padi milik Bapak Marno (B) juga layak untuk dijalankan karena mempunyai NPV sebesar Rp 38,673,284.24, IRR sebesar 17.21%, dan B/C ratio sebesar 1.218 atau memenuhi syarat NPV > 0, IRR ≥ discount rate (7%), dan B/C ratio > 1.
Keyword: Benefit Cost Ratio, IRR, NPV, penggilingan padi

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4