Judul: . Kecukupan Energi Metabolis Pakan Domba Garut Jantan Pada Fase Pertumbuhan di Peternakan Lesan Putra Kecamatan Ciomas Kabupaten Bogor
Abstrak: The content of metabolizable energy (ME) of feed that fed to Garut finisher ram lambs at Lesan Putra Farm, Ciomas, Bogor were measured to study the energy sufficiency of the lambs. Six growth lambs were used in this experiment. The feed are natural grass and soybean meal curd. The trial on feed was 21 days. The faeces were collected everyday using the faeces collection bags that placed under the metabolism cages. The live weight gain (LWG) of the lamb were compared with the LWG that recommendated by UKASTA, ADAS, COSAC (1985) and also with the LWG standard of the Garut finisher ram lamb using t-test. The parameters measured were feed intake, digestibility, metabolizable energy (ME), LWG and energy for gain (Eg). The result showed that the LWG standard for growth Garut lambs was 75.72 gram/day and was not significantly different (P>0.05) with the LWG of Garut lamb 2, 3, 4 and 6; but was significantly different with Garut lamb 1 (P<0.05) and 5 (P<0.01). The LWG rate of the experiment were 73.73±17.40 gram/day, while the LWG based on Eg 2.22±0.21 MJ were 146.06±12.24 gram/day. This result indicated that the lambs ME needs was sufficient, but the use of ME was not efficient. The lamb LWG of the experiment has appropriate with the LWG standard of the Garut finisher ram lamb.
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Judul: Kecukupan energi metabolis pakan domba garut jantan pada fase pertumbuhan di desa Sukawargi Kabupaten Garut
Abstrak: Upaya untuk melestarikan keberadaan domba Garut adalah dengan mengetahui ransum yang biasa diberikan oleh peternak. Penelitian ini dilakukan untuk mengetahui kecukupan energi metabolis pakan domba Garut jantan di Desa Sukawargi, Kecamatan Cisurupan, Kabupaten Garut. Ternak yang digunakan dalam penelitian ini adalah domba Garut jantan pada fase pertumbuhan milik para peternak dengan rataan bobot badan awal 19.05 ±2.35 kg. Ransum yang diberikan berupa rumput alam, leguminosa, perdu, gulma, limbah hasil pertanian dan dedak padi halus. Energi metabolis pakan yang dikonsumsi oleh ternak dihitung berdasarkan rekomendasi UKASTA, ADAS, COSAC (1985) yaitu ME = 0.015DCP + 0.034DEE + 0.013DCF + 0.016DNFE. Hasil penelitian menunjukan bahwa energi metabolis pakan yamg dikonsumsi oleh ternak telah mencukupi dan dapat dimanfaatkan untuk hidup pokok dan produksi. Namun demikian pertambahan bobot badan yang diperoleh, dengan energi tersimpan untuk pertumbuhan yang ada, belum sesuai dengan prediksi pertambahan bobot badan yang di rekomendasikan oleh UKASTA, ADAS, COSAC (1985).
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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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