Judul: Analisis Kelayakan Pengembangan Usaha Ikan Hias Black Ghost (Afteronotus albifrons) pada Vizan Farm di Kecamatam Bojongsari Kota Depok
Abstrak: Vizan Farm is one of the ornamental fish producing farms of Black Ghost at Bojongsari District, Depok City which has conducted its business development. This study aimed at analyzing the development feasibility of ornamental fish business of Black Ghost viewed from the non-financial aspects and financial aspects, and at finding out its sensitivity value. Based on the analysis on the non-financial aspects, it can be said that the business of ornamental fish of Black Ghost at Vizan Farm is feasible to run. The results of the financial analysis before and after the business development of ornamental fish Black Ghost at Vizan Farm showed that this business is feasible, where before the development, the business obtained an NPV value of Rp 159 430 261.00, an IRR of 20.73 percent, Net B/C at 2.20, and payback period for 4 years and 11 months. Meanwhile, after the development, the businesses obtained an NPV of Rp 301 325 943.00, an IRR of 26.65 percent, Net B/C of 2.27, and payback period of 4 years and 8 months. The result of the sensitivity analysis on the condition when the feed price increases by 50 percent showed that the business generated an NPV of Rp 113 509 319.00, an IRR of 20.75 percent, Net B/C of 1.84, and Payback Period of 6 years and 5 months. Furthermore, when the production decreases by 20 percent, the business is able to generate an NPV of 18 361 126.00, an IRR of 8.60 percent, Net B/C of 1.13, and Payback Period of 9 years 8 months.
Keyword: Payback Period., Net B/C, IRR, NPV, Financial Analysis, Vizan Farm

Judul: Analisis kelayakan pengembangan usaha ikan hias air tawar Iwan Wahana Fish Farm Kota Bekasi
Abstrak: Ornamental fish is one of the new commodity that still require more intensive development efforts in Indonesia. Iwan Wahana Fish Farm as a business entity engaged in the field of cultivation of freshwater ornamental fish have not been able to meet the demand against the increasing every year, so it will be done to expand the scale of business development. The purpose of this research is to analyze the feasibility of the development of freshwater ornamental fish Iwan Wahana Fish Farm in Bekasi based on market aspects, technical aspects, and financial aspects. The analysis tool used are the TOWS analysis, EOQ method, NPV, Net B / C, IRR, Payback Period, and Switching Value Sensitivity analysis supported by Microsoft Office Excel software. As a result, market aspects and technical aspects of business development declared eligible to run. On the financial aspects of business development at Iwan WahanaFish Farm feasible with NPV of Rp 377 989 000; Net B / C of 2.29; IRR of 46% and payback period for 1.5 years. The results of the sensitivity analysis calculation of switching values obtained maximum changes decrease the survival rate of freshwater ornamental fish by 48.98%, the maximum change in market demand decline of 24.82%, and the maximum change for the increase in raw material costs amounted to 51.55%.
Keyword: Bogor Agricultural University, freshwater ornamental fish, feasibility analysis

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.
Keyword: