Judul: Analisis Risiko Produksi Ikan Black Ghost di Unit Pendederan I Arifin Fish Farm Kota Bogor, Jawa Barat
Abstrak: Apteronotus albifrons known as the black ghost fish are fish that originated from South America. One of the fish farmers who produce fish black ghost in the city of Bogor is Mr. Arifin. Each production cycle fluctuations fish survival rate, this indicated the existence of risk. The purpose of this study is (1). identify risks faced by Mr. Arifin production in units of fish nursery I blackghost (2). analyzing the probability and impact of risk sources encountered Mr. Arifin in unit nursery I fish black ghost. (3). determine appropriate strategies to address the risks faced by Mr. Arifin production in the nursery unit I fish black ghost. Data obtained from field observation and interviews with business owners. Then the data were analyzed with descriptive methods and risk analysis. Results obtained by analysis of sources of risk in Arifin fish farm is changes in water quality, and fish disease attacking each other. Value of the probability and impact of each risk is 43,3% change in water quality and Rp 1,060,436, the disease was 48,0% and Rp 1,848,419, fish attacked each other at 34,5% and Rp 248,781. Sources of risk management strategies fish use to attack each other preventive strategies. Sources of risk management strategies and changes in water quality by using preventive and mitigation strategies.
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Judul: Analisis Sumber Sumber Risiko Produksi Pembenihan Ikan Patin Siam pada Pasir Gaok Fish Farm di Kabupaten Bogor
Abstrak: Siam’s catfish is potential commodity which can develop in Indonesia. This commodity has been developed by Pasir Gaok Fish Farm (PGFF). PGFF faces the production risk as indicated by the production fluctuation and enhancement of catfish seed mortality. The purpose of this study are to identify the sources of production risk, analyze the probability, impact of risks, and alternative strategies. The data was analyzed with descriptive analysis, z-score analysis, and analysis of Value at Risk (VaR). The results showed that prodution risks of siam’s catfish in PGFF are cannibalism, diseases, water quality, and human error. Probability value of each highest risk source consist of cannibalism, diseases, water quality, and human error. The impact of the each highest production risk arerisk of disease, cannibalism, water quality, and human error. Based on the probability and impact of risk, prevention strategies needed to be implemented to solve the risk of cannibalism and disease with giving fresh natural food according to the needs of fish and right time.
Keyword: Bogor Agricultural University (IPB), z-score, value at risk, siam catfish, production risk, pasirgaok

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition