Judul: Evaluasi Penerapan Good Dairy Farming Practice di Cordero Farm Kabupaten Bogor.
Abstrak: Peternakan kambing perah merupakan salah satu sub sektor peternakan yang dapat membantu memenuhi gizi masyarakat. Produksi susu untuk memenuhi kebutuhan susu nasional masih belum optimal. Perlu peningkatan produktivitas pemeliharaan ternak dengan menggunakan Good Dairy Farming Practice. Tujuan penelitian adalah Evaluasi Good Dairy Farming Practice (GDFP) Kambing Perah di Cordero Farm. Penelitian dilakukan dengan metode survei di Cordero Farm, kabupaten Bogor pada bulan November sampai Desember 2015. Alat yang digunakan mengambil data adalah kuisioner. Teknik yang digunakan yaitu wawancara. Data yang diperoleh dianalisis deskriptif. Hasil penelitian menunjukkkan rata-rata penerapan Good Dairy Farming Practices (GDFP) aspek pemeliharaan di Cordero farm sebesar 2.73±0.40 termasuk dalam kategori cukup, bagian aspek pembibitan dan reproduksi hasil rata-rata yang diperoleh sebesar 2.14±0.90 termasuk kategori cukup, aspek manajemen pakan dan air minum nilai rata-rata 2.56±1.13 kategori cukup, nilai rata-rata bagian aspek pengelolaan 3.25±0.71 termasuk kategori baik, pada aspek kandang dan peralatan rata-ratanya 2.83±0.75 dapat dikategorikan cukup, aspek kesehatan ternak rata-rata yang didapat sebesar 2.67±0.58. Cordero farm perlu peningkatan manajemen pemeliharaan pada aspek pembibitan dan reproduksi ternak, manajemen pakan dan air minum, kandang dan peralatan serta kesehatan ternak yang lebih baik.
Keyword: Cordero farm, GDFP, kambing perah

Judul: GDFP and GMiP on Dairy Cattle Farms on a Scale of 10 Heads Dairy Cows Lactation in the Farm Business Area of Bogor Dictrict
Abstrak: Sapi perah merupakan sapi penghasil susu. Sapi perah yang banyak dijumpai di Indonesia merupakan sapi perah bangsa Friesian Holstein (FH). Keberhasilan dalam beternak sapi perah erat kaitannya dengan manajemen pemeliharaan juga manajemen pemerahan yang dilakukan oleh peternak. Penelitian ini mengethaui penerapan Good Dairy Farming Practice (GDFP) dan Good Milking Practice (GMiP) di Kawasana Usaha Peternakan (KUNAK) Kabupaten Bogor. Penerapan GDFP meliputi aspek pembibitan dan reproduksi, pakan dan air minum, pengelolaan, kandang dan peralatan, kesehatan ternak serta aspek kesejahteraan ternak. Penerapan GMiP meliputi aspek sebelum, saat, setelah pemerahan. Penelitian dilakukan dengan mewawancarai 30 peternak dalam 14 peternakan dengan populasi sapi perah 10 ekor betina laktasi. Data dianalisis deskriptif dan disimpulkan sesuai poin-poin yang telah diberi skor 4,3,2,1,0. Aspek GDFP yang sudah diterapkan dengan baik yaitu aspek pembibitan dan repoduksi, manajemen pakan dan air minum serta kesejahteraan hewan. Aspek GMiP yang sudah diterapkan cukup baik yaitu pada proses sebelum dan setelah pemerahan. Rata-rata produksi susu di peternakan KUNAK Kabupaten Bogor sebesar 10,9 L., Dairy cows are cows that produce milk. Friesian Holstein (FH) is on of the dairy cows that are found in Indonesia. Success in raising dairy cows is closely related to husbandry and milking management conducted by farmers. This study evaluated the application of Good Dairy Farming Practice (GDFP) and Good Milking Practice (GMiP) in the Farm Business Area of Bogor District. GDFP implementation includes aspects of breeding and reproduction, feed and drinking water management, management, housing and equipment, animal health also animal welfare. GMiP implementation includes before, during, and after milking. The study was conducted by interviewing 30 farmers in 14 farms with a population of 10 heads lactating dairy cows. Data were analyzed descriptively and summarized accordance of points that have been given a score of 4,3,2,1,0. GDFP aspects that have been implemented well that aspects of breeding and reproduction, aspects of feed and drinking water management, and aspect of animal welfare. GMiP aspects that have been implemented is good enough in the process before and after milking. Milk production averge in KUNAK farm of Bogor District was 10,9 L.
Keyword: dairy cows, descriptive analysis, GDFP, GMiP

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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