Judul: Kajian Usaha Pembesaran dan Pemasaran Ikan Lele serta Strategi Pengembanganya di UD Sumber Rezeki Parung, Jawa Barat
Abstrak: Consumption and demand for catfish has increased. These conditions open a big opportunities for catfish farming. To be successful in catfish farming, it requires technology and the enlargement of catfish market domination. The purpose of this study was to determine the magnification and technology marketing at UD Sumber Rezeki and get a new breakthrough in marketing efforts and the enlargement of catfish, determine the feasibility and efficiency of marketing efforts and the enlargement of catfish, find the prospect of catfish processed products, know the strengths, weaknesses, opportunities and threats in the enlargement and marketing of catfish and determine the strategy of business development and marketing of catfish enlargement on UD Sumber Rezeki. Technology production processes carried out by following the catfish aquaculture activities at UD Sumber Rezeki Parung, West Java, and then analyzed the feasibility of their business. The analisis through qualitative analysis, quantitative analysis of IFE (Internal Factor Evaluation) and External Factor Evaluation (EFE) Matrix IE and SWOT (Strengths, Weaknesses, Opportunities and Threats). Catfish farming in the UD Sumber Rezeki Parung, West Java feasible to be implemented with the value of Benefit / Cost (B / C) ratio> 1,26. Break Event Point (BEP) catfish production. Rp. 9631.76 per kg, NPV 14% on the value of Rp. 38,140,956, 17% IRR and PBP 3 years 9 months. Efficiency for catfish enlargement in UD Sumber Rezeki determined by the use of water by gravity, the use of probiotics to save time, use sinking feed and floating feed. Based on the IFE (2.83) and EFE (2.81), then the position at UD Sumber Rezeki phase of growth and stability and are in quadrant 5. Based on the analysis matrix and SWOT matrix IE, then the strategy for developing UD Sumber Rezeki, Parung, West Java are (1) market penetration by selling directly to end customer, (2) diversification of catfish products and (3) improve the competence of human resources. The conclusion of this study is the process of enlargement of catfish conducted by UD Sumber Rezeki good enough, the feasibility and efficient good enough but distribution channel catfish is too long. The most appropriate strategy for development is to penetrate and market development and product diversification. The advice is to develop more diversified products and observations in the distribution channel catfish.
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Judul: Dumbo Catfish Hatchery and Enlargement Integration Business Planning at Ciseeng Sub-district, Bogor Regency
Abstrak: Catfish is one of nine leading commodity in the aquaculture sector, whose production increased annually (KKP 2013). As for some catfish production centers which play an important role in meeting demand for catfish namely West Java, East Java, Central Java, Yogyakarta, North Sumatra, West Sumatra, South Sumatra, Lampung, Riau and Riau Islands West Java occupying the highest position as a major producer of catfish (KKP 2013). Dinas Perikanan Provinsi Jawa Barat (2012) states that the Bogor Regency is the center of production centers which accounted for 27.4% of total production in West Java. The center for integrated aquaculture catfish either seed or in the form of catfish consumption in Sub Ciseeng which is one of the Minapolitan (Dinas Peternakan dan Perikanan Kabupaten Bogor, 2013). Seed production occurring in the Sub Ciseeng which began to decline due to the risks experienced in the seeding sector more than 50% compared to the considerable enlargement of the sector reached 35% so that the seed input certainty for enlargement sector decreased. To overcome this, catfish farming need to be developed properly so that the certainty of guaranteed input for enlargement and the need for consumers catfish consumption can be met. The development of the cultivation of catfish one of which can be done by doing the integration between hatchery and rearing sectors. In the process of business development that has integrated catfish is important to do the analysis of business planning on sustainable Jumbo’s Pokdakan because the catfish farming process is influenced by a variety of things ranging from rising feed prices, changes in output prices, and more. Business planning is based on selection of a combination of the scenarios that generate optimum NPV. There are five scenarios that will be analyzed is the effort that starts from the hatchery broodstock to seed 12 cm (first scenario), hatchery operations were started from seed breeders to 1-2 cm and 12 cm (second scenario), hatchery operations were started from seed 1- 2 cm to 12 cm (third scenario), enlargement efforts started from seed 12 cm (fourth scenario), and business enlargement started from seed 1-2 cm (fifth scenario). Based on these things, the purpose of this study was to analyze the feasibility of nonfinancial views of market aspects, technical aspects, management aspects, social aspects, economic aspects and environmental aspects The second objective analyzes of financial feasibility seen from the investment criteria Net Present Value (NPV), Net B / C, Internal Rate of Return (IRR), and Discounted Payback Period (DPP) on five scenarios and combinations of catfish farming can produce optimum conditions. The third objective is to analyze the sensitivity of African catfish fishing effort and drafted a business development subsequent to the integration of African catfish farming that started from seeding to enlargement. This research uses Test feasibility and Zero-one Integer Linear Programming. Results of the analysis showed hatchery operations has actually been decent, but the effort enlargement is more profitable than hatchery operations. From the non-financial aspects of which consists of social, technical, management, economics and the environment before integrated catfish farming is feasible to run but not
Keyword: Dumbo’s Catfish, Feasibility of Investment, Integration, Zero-One Integer

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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