Judul: Analisis Kelayakan Usaha Budidaya Burung Kenari (Kasus: Usaha Asoy D' Canary)
Abstrak: Birds chirping canary become the most popular pet among other domesticated birds chirping reached 424,000 head in Java and Bali is based on research conducted by Jepson and Ladle (2006). One cultivators canary in Bogor is Mr. Asep Permana who named his ranch Asoy D'Canary. The opportunity to meet the demand of a fellow hobbyist encourage businesses to conduct business. The purpose of this study was to analyze the feasibility of cultivation canary with business case studies Asoy D'Canary review of aspects of nonfinancial and financial aspects. Based on the results of the analysis showed that the nonfinancial aspects of the business Asoy D'Canary feasible, because there are no factors that inhibit the production activities Asoy D 'Canary from every aspect. While based on the analysis of the financial aspects of the cultivation of canary Asoy D 'Canary worth the effort with the value of the investment criteria of Net Present Value (NPV) of Rp. 406,175,581, Net Benefit Cost Ratio (Net B / C) of 2.45, the Internal Rate of Return (IRR) 29.11, Payback Period (PP) is 4.06. Maximum limit changes to decrease the amount of production and the increase in feed costs, respectively 44,08 and 390,64 percent.
Keyword: Bogor Agricultural University (IPB), business feasibility, Canary birds

Judul: Analisis Kelayakan usaha Burung Lovebird (Agapornis) studi Kasus: Usaha Bapak Tono di Tuban, Jawa Timur
Abstrak: Lovebird (Agapornis) is a commodity that is just entering the domestic market and abroad several years with a competitive advantage in the national economy. One breeder in Tuban is Mr. Tono’s. The opportunity to meet the demand of collectors and hobbyists has encouraged to conduct business. The purpose of this study was to analyze the feasibility of raising Lovebird of Mr. Tono’s business in terms of nonfinancial and financial aspects. Data processing was done qualitatively and quantitatively. Based on the results of the analysis of non-financial aspects Mr. Tono’s business was feasible because there are no obstacles in the market aspects, technical aspects, management aspects, legal aspects, environmental and social aspects. Meanwhile, according to the calculation of the financial aspects Mr. Tono’s business was feasible with NPV value of Rp1 717 985 715.50, Net B/C of 3.132 , IRR of 53.46 percent, and a payback period 3 years 8 month 18 days.
Keyword: Bogor Agricultural University (IPB), investment criteria, non-financial analysis, change

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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