Judul: Kelayakan Usaha dan Nilai Tambah Olahan Jamur Tiram Putih (Pleurotus ostreatus) Di Bekasi
Abstrak: Bekasi is one of the area in West Java which has the lowest producing mushroom. The weather and the temperatures factor in Bekasi did not support the mushroom production. Nevertheles, it did not discourage the mushroom preneur to passion the oyster mushroom cultivation in Bekasi. One of them is CV. Megah Makmur Sentosa. Therefore, CV. Megah Makmur Sentosa has a plan to develop the oyster mushroom bussines through build a newlarge capasity kumbung to maximazing production capacity in a area in Bekasi. Feasibility study needs to analize a oyster mushroom bussiness. The main aspects in feasibility are non-financial aspect and financial aspect. Non-financial aspect are market, technical, management, legal, social, economy and enviromental. It’s also analyze many changes around bussiness using switching value. Switching value was used to analyze maximum changes in cost and benefit. More over, value added was another analysis tool that calculated the oyster mushroom product. The results will show feasible of investment to implement the oyster mushroom business. The results of the financial analysis showed, the NPV value is Rp 170.590.527, IRR value is 59,60 percent, Net B/C value is 2,50 and discounted payback periodfor 4,44 years. While the analysis of the sensitivity with using switching value method obtained the maximum limit of output reduction is 15,85 percent, maximum limit of oyster mushrooms price reduction is 18, 28 percent, and the increase ofgas LPG cost is 589, 66 percent. Results of analysis showed that business of white oyster mushrooms are sensitive in changes of output and price of white oyster mushroom but is not sensitive in changes of LPG gas cost. Value-added analysis on these two products of process white oyster mushroom as nugget and crispy mushroom showed that the value addedof nugget is Rp 54.295 per kilogram while value added of crispy mushroom is Rp 25.545 per kilogram. This was showed that nugget product has a value added larger than crispy mushroom products.
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Judul: Analisis Kelayakan Usaha Budidaya Jamur Tiram Putih pada Perusahaan Jamur Nusantara, Salabenda, Kotamadya Bogor
Abstrak: Jamur Nusantara company is a company that produces fresh white oyster mushroom and oyster mushroom logs. This company is located in the location of Bogor City Districts Salabenda. Research on the company aims to analyze the feasibility of oyster mushroom cultivation of non financial aspects,financial aspects, and the sensitivity of the feasibility of oyster mushroom cultivation. Of research that has been made know that based on non-finansial aspects that consists of market, technical aspects, management aspects, and socio-ekonomic aspects of the cultivation of oyster mushroom feasible. Feasibility of oyster mushroom cultivation based on the financial aspect consistsof NPV,IRR,Net B/C, and PBP.Based on the financial aspects of oyster mushroom cultivation feasible. This is because the results of the finansial aspects of having NPV greater than zero, the value of Net B/C is more than one, the IRR is the discount rate and PBP than were before the projects ends.Results obtained from the financial aspects is NPV Rp 62 268 326, IRR 65 %, Net B/C 3,25 and PBP 3,92 years equivalent to three years and nine months.
Keyword: Bogor Agricultural University, Jamur Nusantara Company, Feasibility Analysis of White Oyster Mushroom Cultivation (Net B/C, NPV, IRR, PBP, Switching Value), Oyster mushroom, Management aspect, Socio economics aspect

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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