Judul: Pengaruh Kenaikan Harga Kedelai terhadap Profitabilitas dan Nilai Tambah Usaha Tahu Bandung Kayun-Yun di Desa Cihideung Hilir Kecamatan Ciampea Kabupaten Bogor
Abstrak: Small industries is part of SME (Small Medium Enterprise) sector that gives an important role in Indonesia’s economic development. One of small industry that potentially to be developed is soybean industries such as tofu industries. Soybean price increase that occurred in 2013 affects tofu small industrial especially Usaha tahu bandung Kayun-Yun. The purpose of this research was to analyze the effect of soybean price increase on profitability and added value of Usaha Tahu Bandung Kayun-Yun. Research location was selected with the considerations that Ciampea subdistricts is one of the all subdistricts in Bogor district that known as tofu production centers. The results showed after soybean prices increased, the total cost increased by 44 957 794 per month, sales volume is still in 6700 pieces per day, the difference in cost of production in the amount of Rp 206/piece for 4 cm tofu and Rp 254/piece for 5 cm tofu, break-even point in goods value for 4 cm tofu in the amount of 586 pieces with 175 873 rupiah IDR and for 5 cm in the amount of 330 pieces with 115 557 rupiah IDR. Profitability value showed an increase of 30.25 % for 4 cm and 29.36 % for 5 cm tofu. The result of the added value also increased by Rp 8 672/kg for 4 cm tofu and Rp 8 195/kilogram for 5 cm tofu.
Keyword: added value., profitability, Usaha tahu bandung Kayun-Yun, Soybean

Judul: Pengaruh peningkatan harga kedelai terhadap keuntungan dan nilai tambah industri tahu di Desa Leuweung Kolot Kecamatan Cibungbulang Kabupaten Bogor
Abstrak: Soybean is the important ingredient in soybean processing enterprises such as tofu and tempeh. The increase of soybean price that has affects the business sustainability of the household tofu industry who have limited capital and accessibility. The objective of this research is to analyse the effect of increasing soybean price to the cost structure, profit, and value-added of the tofu industry in Leuweung Kolot village. The analysis used in this study consisted of analysis for calculating profit, analysis of revenue and R/C ratio, also the value-added analysis by using Hayami method. Based on the research that had been conducted showed that the increase in soybean price affected the cost structure and profit of tofu industry. The increase in profit based on the strategy undertaken by the tofu industry to increase the selling price and decrease the size of tofu. Likewise with value added analysis indicated that the increase in soybean prices also affected the value added generated by the tofu industry in Leuweung Kolot village.
Keyword: value added, soybean, Profit

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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