Judul: Evaluasi Teknis Pemeliharaan Sapi Perah Friesian Holstein Peternakan Rakyat Di Desa Cibeureum Cisarua Kabupaten Bogor
Abstrak: This research was conducted to evaluate Farming practices of small holder (breeding and reproduction, feeding, management, housing and equipment, and animal health) at dairy farm Cibeureum located in Cisarua Bogor. This research was carried out from March to August 2010. Data were collected from 40 farms using survey method based on field observation, interview with farmers, and direct measurement. Secondary data were collected from local subdistrict and Giri Tani cooperative. The data were frequency tabulated and analyzed using. The the differences between observation and expectation value were analyzed ysing chisquare test (X2). The result showed that farmers knowledge and skills of dairy farming practices were lower than expectated value for breeding and reproduction (75,42%), selection method (34,37%). Therefore, improving farmers knowledge and skill and skill on the most critical point such as cattle selection can be used as a strategy to improve productivity on their farms.
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Judul: Evaluasi Penerapan Good Dairy Farming Practice pada Peternakan Rakyat Sapi Friesian Holstein di Pangalengan dan Cikajang Jawa Barat
Abstrak: Peternakan sapi perah adalah salah satu peternakan yang dapat membantu pembangunan ekonomi nasional, namun produksi susu untuk memenuhi kebutuhan susu nasional ternyata masih belum optimal. Perlu adanya peningkatan produktivitas melalui tatalaksana pemeliharaan. Tujuan penelitian adalah mengevaluasi aspek teknis pemeliharaan sapi perah. Metode yang digunakan adalah metode survey dengan responden sebanyak 32 peternak rakyat di daerah Pangalengan dan 22 peternak rakyat di daerah Cikajang yang memiliki sapi perah 2 sampai 8 ekor. Data karakteristik peternak dianalisis menggunakan analisis deskriptif. Data keterampilan teknis beternak dianalisis dengan uji statistik Independent sample t-Test. Rata-rata hasil kajian terhadap penerapan Good Dairy Farming Practice (GDFP) bahwa aspek pemeliharaan sapi perah di daerah Pangalengan (3.16±0.22) termasuk dalam kategori baik, sedangkan penerapan GDFP di daerah Cikajang (2.96±0.10) termasuk dalam kategori cukup baik. Berdasarkan capaian hasil GDFP dapat disimpulkan bahwa peternak di daerah Cikajang perlu peningkatan manajemen pemeliharaan yang lebih baik dari peternak di daerah Pangalengan.
Keyword: Cikajang, good dairy farming practice, Pangalengan, sapi perah

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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