Judul: Analisis Kelayakan Usaha Pengolahan Sirup Sawo pada Kelompok Wanita Tani Teratai Indah di Kabupaten Kuantan Singingi, Provinsi Riau
Abstrak: Sapodilla is tropical fruit that has been long known and widely grown in almost all areas of Indonesia. Kuantan Hilir Seberang Sub-district, Kuantan Singingi District, Riau Province is one of the producing regions of sapodilla and becomes a pioneer in sapodilla syrup processing enterprises. The purpose of this research is to analyze business feasibility in Women Farmers Group (KWT) Teratai Indah based on financial and non financial aspects. Moreover, this research also analyzes sensitiveness on business changes using switching value analysis. The result showed that all the criteria on the non financial aspects was feasible except the scale of production. Financial aspects of the actual condition was not feasible, while the development plan was feasible. The sensitivity analysis showed that the reduction in the number of production condition was more sensitive than the price increase of sapodilla and sugar
Keyword: Bogor Agricultural University (IPB), switching value, sapodilla syrup, non financial aspects, financial aspect

Judul: Analisis Kelayakan Pengembangan Usaha Penggilingan Tepung Ubi Jalar pada KWT Berkah Sari Desa Purwasari, Kecamatan Dramaga, Kabupaten Bogor
Abstrak: Berkah Sari as a woman farmer group has been processing sweet potatoes into sweet potatoes flour. It is located in Purwasari Village, Dramaga Subdistrict, Bogor District. This study aims to (1) analyze the feasibility of nonfinancial aspects such as market; technical; management and legal; economic and social; and enviromental aspects of sweet potatoes flour business on the actual condition and adding a new investment of milling machine (development condition); (2) analyze the feasibility of financial aspects such as Net Present Value (NPV), Net Benefit Cost Ratio (Net B/C Ratio), Internal Rate of Return v (IRR), and Payback Period (PP) on the actual condition and adding a new investment of milling machine (development condition); and (3) analyze the switching value of increasing input price and decreasing output price. Based on non-financial analysis, almost all aspects were feasible, except for production process in technical aspect and legal aspect. Based on financial analysis, the actual condition was not feasible, except for payback period criteria. In terms of development condition, it was feasible where the NPV was IDR104 440 708.02, net B/C 4.42, IRR 63 percent, and Payback Period 1.14. The discount rate was 5.75 percent. Switching value analysis showed that the increasing purchasing price of fresh sweet potatoes by 69.32 percent and the decreasing price of sweet potatoe flour by 17.94 percent were still feasible. The Incremental Net Benefit from actual to development conditions was IDR107 768 620.67, implying that the new invesment of milling machine would give benefit to Berkah Sari woman farmer group
Keyword: PP, IRR, Net B/C, NPV, Incremental Net Benefit

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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