Judul: Performa Domba Ekor Tipis (Ovis aries) dengan Pemberian Pakan yang Mengandung Limbah Sayuran Pasar
Abstrak: Vegetable waste is one of the alternative feed that can be used because of availability in abundance and has a high nutrient content. This research was conducted to determine the performance of sheep fed by vegetable waste such as cauliflower leaves, beans sprout waste and corn husk. The experimental design used in this research was Randomized Complete Design with 3 treatments and 4 replications. The treatments were P1 (60% forages + 40% feed containing cauliflower leaves), P2 (60% forages + 40% feed containing beans sprout waste), and P3 (60% forages + 40% feed containing corn husk). Parameters observed in this experiment included feed consumption, daily body weight gain, and feed efficiency. The results showed that the treatment gave a significant effect (P<0.05) for daily body weight gain and dry matter consumtion. Feeding containing cauliflower leaves gave the best result on the value of feed efficiency and Income Over Feed Cost (IOFC). Sheep were given by feed containing cauliflower leaves produced a high body weight gain of 134.29 g head-1 day-1
Keyword: vegetable waste, thin tailed sheep, performance, daily weight gain

Judul: Daya Cerna Wafer Komplit Limbah Sayuran Pasar Terhadap Domba Ekor Tipis (Ovis aries)
Abstrak: The vegetable waste is potential as feed for sheep, but it’s so easily damage, so that it is necessary to be processed. The purpose of this research was to investigate about the effect of vegetable waste wafer on body weight gain of sheep. This research used 15 Ovis musimon with body weight ranged between 17 until 30 kg. This research were arranged in Randomized Block Design which grouped by body weight with five treatments and three replications. The treatments were : R1=100% conventional feed (forage and rice bran), R2=75% conventional feed + 25% vegetable waste wafer, R3=50% conventional feed + 50% vegetable waste wafer, R4=25% conventional feed + 75% vegetable waste wafer, and R5=100% vegetable waste wafer. The composition ofwafercomplete feed of vegetable waste consisted of husk ofcorn, leavesof cauliflower, and bean sprouts waste.The results showed that the treatments until 50% were not gave negative effects on digestibility dry matter digestibility and organic matter digestibility
Keyword: wafer., body weight gain, vegetable waste, 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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