Judul: Profil Hematologi dan Performa Ambing Kambing Peranakan Etawah (PE) Dara yang Diberi Bawang Putih (Allium sativum)
Abstrak: The aim of this research was to evaluate the effect of garlic in etawah crossbred goat ration on hematology profile and udder performance. This research used 10 etawah crossbred goats devided into 2 treatment groups. First group was given control feed (R0) without garlic, and second group was given control feed plus 0.15% garlic (R1). The ratio of forage to concentrate in dry matter base was 16:84. Parameter measured were dry matter consumption, nutrient intake, body weight gain, hematology profile, and udder performance. The data was compared with T-test analysis. The results showed that 0.15% garlic at ration had not affected to nutrient consumption, hematology profile and udder performance
Keyword: udder performance, hematology profile, garlic, etawah crossbred goat

Judul: Perilaku Makan Kambing Peranakan Etawah Bunting dan Pengaruhnya terhadap Konsumsi, Kecernaan Bahan Kering, serta Bobot Badan.
Abstrak: Goat feeding behavior was an important study in livestock. This study aimed to examine the relationship feeding activity towards consumption, digestibility, and body weight gain in breeding doe Etawah Crossbreeed. This study uses 12 PE doe with an average weight of 40.40 ± 3:19 kg range. This study uses the exploration and correlation analysis. Variables measured were feeding behavior (time spent concentrates, forage consumed within one hour, and a feeding time ) and performance of doe (consumption, digestibility, and body weight gain). Results show the time spent concentrate has a weak relationship with a positive correlation to consumption. Forage consumed within an hour of having a relationship with a weak negative correlation with dry matter digestibility. Feeding time had a weak association with a negative correlation with body weight daily. Feeding behavior was needed in the management of livestock feeding. So that the management could be seen aas feeding their effects on animal performance.
Keyword: consumption, digestibility, etawah crossbreed doe, feeding behavior, body weight gain

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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