Judul: Evaluation of Forage Provision Patterns in Sheep  Farms in Sukakerta Village, Cilaku District, Cianjur Regency
Abstrak: Sukakerta merupakan salah satu desa di Kecamatan Cilaku Kabupaten Cianjur yang memiliki potensi peternakan domba yang besar. Peternakan domba di Desa Sukakerta merupakan peternakan dengan sistem intensif dan bergantung pada hijauan dari alam sebagai pakan. Tujuan dari penelitian ini adalah untuk mengevaluasi penyediaan hijauan pakan di Peternakan Domba Desa Sukakerta , Kecamatan Cilaku, Kabupaten Cianjur. Penelitian dilakukan dengan survei berupa wawancara menggunakan kuisioner dan pengamatan di lapang. Data dianalisis menggunakan analisis deskriptif, indeks keanekaragaman jenis, indeks kekayaan jenis, indeks kemerataan jenis dan analisis model linier. Hasil penelitian menunjukkan bahwa peternak di Desa Sukakerta termasuk dalam usia produktif tetapi memiliki pendidikan yang rendah. Pengalaman beternak tidak berpengaruh terhadap jumlah kepemilikan ternak. Sukakerta memiliki indeks keanekaragaman jenis yang sedang yaitu 2,20. BCS (skor kondisi tubuh) dan ukuran tubuh (lingkar dada, tinggi pundak, panjang badan) memiliki korelasi negatif dengan hijauan kandang dan memiliki korelasi sangat rendah dengan hijauan lapang., Sukakerta is one village in Cilaku, Cianjur Regency, which has potency for sheep farming development. The purpose of this study was to evaluate the pattern of forage supply in Animal Husbandry, Cilaku District, Cianjur Regency. The research was conducted with a survey in the form of interviews using questionnaires and field observations. Data were analyzed using descriptive analysis, species diversity index, species richness index, evenness index and linear model analysis. The results showed that the sheep farmer in Sukakerta Village were on productive age but have low education. Rearing sheep experience has no effect on the number of livestock. Sukakerta has a moderate species diversity index, namely 2.20. BCS (body condition score) and body size (chest circumference, shoulder height, body length) had a negative with forages diversiy in the barn and had a very low appearance with field forages.
Keyword: BCS, farmer, forage diversity

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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