Judul: Analisis Kelayakan Usaha Peternakan Domba Bens Farm di Cimahpar Kota Bogor
Abstrak: Usaha ternak domba merupakan usaha peternakan yang penerapannya cukup sederhana namun menjanjikan karena banyak dari domba yang bisa dimanfaatkan seperti susu, kulit, dan bulunya. Dalam penelitian ini bertujuan untuk menganalisis kelayakan usaha ternak domba Bens Farm yang berlokasi di Cimahpar Kota Bogor. Metoda penelitian yang dilakukan yaitu pengisian kuisioner oleh Bens Farm. Analisis yang dilakukan meliputi perhitungan Rentabilitas, BEP, B/C ratio, dan payback period. Nilai Rentabilitas yang diperoleh yaitu 23.3 %, nilai BEP unit 26 ekor, nilai BEP harga Rp. 610 314, nilai B/C ratio 1.23, dan nilai payback period 3.2 tahun. Dari hasil yang diperoleh dikatakan bahwa usaha ternak domba Bens Farm layak untuk dijalankan.
Keyword: Bens Farm, Rentabilitas, BEP, B/C ratio, payback period

Judul: Analisis kelayakan usaha ternak domba rakyat di Desa Cibunian Kecamatan Pamijahan Kabupaten Bogor
Abstrak: The objectives of this research are: (1) to describe the characteristic of farmer and their sheep farm; and (2) to analyze the financial feasibility of sheep farm and it's sensitivity. Cluster random sampling applied to choose 164 sample from 700 sheep farmers household population in Cibunian Village. The sheep farm were clasified into three categories based on ownership of sheep, namely scale I (0,75- 2,50 SDD or Adult Sheep Unit); scale II (2.51-4.75 SDD); and scale III (4,76-8,50 SDD). The result of this research showed chat generall (52,44%) farmer in Cibunian village comitted their sheep farm on scale I. Farmer of each scale in avarage were categorized into productive aged, have lots of experience on shap farm activities, but they have low education. The result of financial feasibility analysis showed that for 10 years at the interest rate of 9,50%, Net Resent Value (NPV)of sheep farm on scales I, II and III respectively is Rp (3.537.029,00); Rp (1.413.826,00); and Rp 1.770.5 19,00, with the values of Benefit Cost Ratio (BCR) are 0.67; 0,89; and 1 ,I 0. Internal Rate of R e m (IRR) on scale I1 and 111 respectively is 057 and 16,56%. Sensitivity analysis was counted on scale Ill. Sheep farm on scale 1II was not feasible if farm costs increased more than 9,97% or farm revenues decreased more than 9.06% ceteris paribus.
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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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