Judul: The relation of characteristics of local farmers against local sheep’s nutrients requirement in neglasari and cikarawang village
Abstrak: Penelitian ini dimaksudkan untuk mendeskripsikan umur peternak, pengalaman beternak, alokasi waktu beternak, dan pelatihan penyusunan ransum, menghitung konsumsi bahan kering (BK), Total Degistable Nutrient (TDN), protein kasar (PK), kalsium (Ca), dan fosfor (P) domba lokal serta hubungan keduanya di desa Cikarawang dan Desa Neglasari, Kecamatan Dramaga, Kabupaten Bogor. Penelitian ini dilakukan selama 4.5 bulan dengan jenis penelitian studi kasus, menggunakan teknik survei dan kuisioner sebagai panduan dalam wawancara. Sampel responden diambil minimal tiga orang, kemudian masing-masing sampel responden diambil sampel domba sebanyak tiga ekor. Domba yang digunakan adalah domba ekor tipis betina dengan bobot badan 10 dan 20 kg. Hasil yang diperoleh yaitu belum terpenuhinya kebutuhan nutrien domba di kedua desa tesebut. Semakin tinggi umur peternak, pengalaman beternak dan alokasi waktu beternak cenderung semakin tinggi jumlah pemberian pakan, sehingga mengakibatkan semakin tinggi pula konsumsi nutriennya., This study was aimed to describe age farmers, experience of farming, time alocation, and training of ration formulation, calculating comsumption dry matter (DM), Total Digestable Nutrient (TDN), crude protein (CP), calcium (Ca) and phospore (P) of local sheeps and both relation in Cikarawang and Neglasari Villages, District Dramaga, Bogor Regency. This study was conducted for 4.5 months by literatures study, surveying as a guidance of interview. Sample was taken from at least three persons and then from each respondent was taken sample of sheeps as much three sheeps. The sheeps that used were female Javanesse Thin-Tailed sheep which weight were 10 and 20 kg. The result was nutrient requirements were not fulfilled at the both villages. The higher age, experience, and time alocation was the the higher amount of feeding so nutrients consumption also became higher.
Keyword: domba, konsumsi nutrien, karakteristik peternak

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: 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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