Judul: Karakteristik Estrus dan Tingkat Kebuntingan Domba Garut dengan Penambahan Minyak Biji Bunga Matahari (Helianthus annus) pada Ransum
Abstrak: The purpose of this research was to observe the garut sheep consumption of nutrients,characteristic responses and pregnancy rate which was given the addition of sunflower oil (Helianthus annuus) in the ration. The research was conducted based on completely randomized design with 4 treatments were P0 (control ), P1 (with 2 % addition of sunflower oil), P2 (with 4 % addition of sunflower oil), and P3 (with 6 % addition of sunflower oil ), and 8 replications. The data were analized by ANOVA and continued with Duncan test if there were mean differences. Analysis of data used SPSS 16.0 and presented descriptively. The result showed the addition of sunflower oil significantly (P<0.05) reduced dry matter consumption and very significant (P<0.01) reduced the consumption of crude protein, calcium, phosphor and increased crude fat. The fastest onset estrous found in P3 treatment and the longest estrous found in P1 treatment. The P2 treatment resulted in good response (75%) with the highest pregnancy rate (62.5%).
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Judul: Kecernaan Zat Makanan pada Domba Garut Bunting yang Diberi Ransum dengan Level Minyak Biji Bunga Matahari Berbeda
Abstrak: The aim of this research was to determine the optimal level of sunflower seed oil in the diet that evaluated through measurement of nutrient digestibility in Garut ewes at the middle period of pregnancy. This research used completely randomized design and divided into four treatments. The treatments were P0 (without sunflower seed oil), P1 (2% of sunflower seed oil), P2 (4% of sunflower seed oil) and P3 (6% of sunflower seed oil). Data were analyzed by analysis of variance and any significant differences were further tested using polynomial orthogonal. The result showed that the treatments did not affect the consumption and digestibility of dry matter, crude protein, crude fiber, N-free extract, total digestible nutrients, average daily gain and feed efficiency, but its significantly affected (P<0.05) the consumption and digestibility of crude fat. It is concluded that the use of sunflower seed oil at 4% level could increase the consumption and digestibility of crude fat.
Keyword: sunflower seed oil, pregnant ewe, digestibility

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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