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: Analisis kelayakan pengembangan usaha budidaya Jamur Tiram Putih di Lembah Madani Jamur Tiram, Kota Bogor
Abstrak: Jamur tiram putih merupakan komoditas hortikultura yang memiliki prospek yang cukup menjanjikan untuk dikembangkan. Penelitian ini bertujuan untuk menganalisis kelayakan pengembangan usaha jamur tiram putih. Metode kualitatif digunakan untuk menganalisis aspek non finansial seperti aspek pasar, aspek teknis, aspek manajemen dan hukum, aspek sosial ekonomi dan budaya serta aspek lingkungan. Metode kuantitatif digunakan untuk menganalisis aspek finansial berdasarkan kriteria investasi seperti NPV, IRR, Net B/C dan payback period, analisis sensitivitas dan switching value. Analisis finansial dilakukan dengan menggunakan tiga skenario. Hasil analisis non finansial menujukkan bahwa seluruh aspek non finansial layak untuk dilakukan pengembangan usaha kecuali aspek manajemen dan hukum. Hasil analisis finansial dapat disimpulkan bahwa usaha skenario I dinyatakan tidak layak untuk dijalankan sedangkan usaha skenario II dan skenario III dinyatakan layak untuk dijalankan. Hasil analisis sensitivitas menunjukkan bahwa usaha di Lembah Madani Jamur Tiram sensitif terhadap penurunan produksi baglog dibandingkan.
Keyword: business feasibility, scenario, white oyster mushroom

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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