Judul: Analisis Risiko Produksi Pembenihan Ikan Lele Sangkuriang Pada Saung Lele di Kampung Jumbo Sukaraja Kabupaten Bogor
Abstrak: Catfish was one of the consumption fish that has been cultured in Indonesia which has good prospect. The high number of catfish consumption demand, causing the request of catfish seed increasing. Bogor regency was the largest catfish-producing region in the province of West Java and has been designated to be regional aquaculture minapolitan region. Bussiness who work in the breeding of catfish om Bogor regency was Saung Catfish. Entrepreneur was faced with the SR fluctuation problem that indicate a risk of production. In identifying the sources of risk was used descriptive method. Quantitative methods used in counting probability using the Z-score and calculate the impact of using VaR. Sources of production risks contained in catfish hatchery business Sangkuriang at Saung Catfish were pests, disease, water quality, and cannibalism. The analysis result of the probability or the possibility risk arise, i.e. : 1) the pest by 35.6 percent, 2) disease of 29.1 percent, 3) water quality by 40.5 percent, and 4) cannibalism of 34.1 percent. The analysis results of the risk impact, i.e : 1) pest as much Rp. 793 146, 2) disease in amount of Rp. 734 049, 3) water quality of Rp. 1,075,684, and 4) cannibalism in amount of Rp. 956,926. Risk production management strategies for pest risk source, water quality, and cannibalism was by prevention. While the source of risk on disease was handled by manage the maintenance medium properly.
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Judul: Analisis Risiko Produksi Pembenihan Lele Sangkuriang di Ternak Ikan Sang Manja Kecamatan Ciampea, Kabupaten Bogor.
Abstrak: Ikan lele sangkuriang merupakan salah satu ikan air tawar yang banyak diminati oleh kalangan masyarakat dan memiliki prospek yang sangat baik ke depannya. Salah satu usaha yang membudidayakan ikan lele sangkuriang adalah Ternak Ikan Lele Sang Manja di Desa Tegalwaru Kecamatan Ciampea Kabupaten Bogor. Tujuan dari penelitian ini adalah untuk mengidentifikasi sumber risiko produksi, menganalisis probabilitas dan dampaknya, serta merumuskan strategi penanganan risiko produksi. Identifikasi sumber risiko menggunakan analisis deskriptif dan diperoleh bahwa sumber risiko yang dihadapi adalah kanibalisme, hama, penyakit dan human error. Analisis probabilitas dan dampak menggunakan alat analisis Z-score dan VaR (Value at Risk). Dari hasil perhitungan diperoleh bahwa probabilitas risiko produksi yang bersumber dari kanibalisme sebesar 32 persen, hama 25 persen, penyakit 36 persen, dan human error 23 persen. Dampak risiko dari kanibalisme Rp 4 108 956, hama Rp 3 150 705, penyakit Rp 1 837 078, dan human error Rp 1 761 404.
Keyword: Dampak risiko, Probabilitas, Value at Risk, Z-score

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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