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: Performa Ternak Domba Ekor Tipis yang Diberi Pakan Wafer Komplit Limbah Sayuran Pasar
Abstrak: Thin-tailed sheep is one of local sheep that can help to support the needs of society’s animal protein. Wafer complete feed of waste vegetable market is one of the feed results of technology that has nutritional value better than feeding a conventional feed (forage and rice bran). A number of 15 thin-tailed sheep was given wafer complete feed of waste vegetable market at different levels. The purpose of this study was to compare the effect of wafer complete of vegetable waste treatment on different levels to the productivity of thin-tailed sheep. Parametes measured were feed consumption, daily weight gain, feed conversion, and income over feed cost (IOFC). The results obtained were treatment with wafer complete of vegetable waste were able to increase the sheep’s body weight, but didn’t effect on sheep’s daily consumption. Wafer complete feed of waste vegetable market that was given 100% to the sheep had the lowest feed conversion. Meanwhile, level of 25% wafer complete feed had the highest value of IOFC
Keyword: wafer, sheep, feed conversion, consumption, Complete feed

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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