Judul: Performa itik alabio jantan umur 1-10 minggu yang diberi daun beluntas, vitamin C dan E dalam pakan
Abstrak: Alabio male ducks are potential as producer of meat. Many factors influence in ducks production, including feed quality. Feed supplementation such as antioxidant will improve the ducks performance. Beluntas leaf meal, vitamin C and vitamin E could be used as source of antioxidant. The objective of this study was to know the effect of feeding beluntas leaf meal, vitamin C and vitamin E on performances of Alabio male ducks. This study used 96 male Alabio ducks and were reared from one week up to 10 weeks of old. The diet treatments used were commercial feed as control diet (K), control diet + 0.5% beluntas leaf meal (KB), control diet + 0.5% + beluntas leaf meal 250 mg / kg vitamin C (KBC) and feed control + 0.5% beluntas leaf meal + 400 IU vitamin E (KBE). A randomized block design, with 4 treatments and 3 replication was used in this study. The parameters observe were feed consumption, final body weight, body weight gain and feed conversion. The results showed that feeding 0.5% beluntas leaf meal (KB), 0.5% beluntas leaf meal + 250 mg/kg vitamin C (KBC) and 0.5% beluntas leaf meal + 400 IU vitamin E (KBE) did not affect the feed consumption, final body weight, body weight gain and feed conversion. The conclusion of this research did not affect the performances of Alabio male ducks at 1-10 weeks of age.
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Judul: Performa itik Cihateup jantan umur 10 minggu yang diberi tepung daun beluntas, vitamin C dan vitamin E dalam ransum
Abstrak: Male duck is potential as meat producer, but the ducks meat off-odor limited the consumers preference. Reducing off-odor has success with supplementation beluntas 1% in feed. However the feed conversion were higher than control. To improve feed conversion, using beluntas reduced 0,5%. To covered deficient antioxidant, try added vitamin C and E.The purpose of this research was to study the effect of feeding beluntas leaf meal, vitamin C and vitamin E in improving ducks performances (feed intake, body weight, body weight gain and feed conversion). The diet treatments were commercial diet as control (K), commercial diet+beluntas leaf meal 0.5% (KB), commercial diet+beluntas leaf meal 0.5%+250 mg C vitamin (KBC), commercial diet+beluntas meal 0,5%+400 IU E vitamin (KBE). Ninety six ducks were used for this research and divided into four treatments and three replications. The ducks were reared from one week up to 10 weeks of old. The parameter measured were feed intake, body weight, body weight gain and feed conversion. The results showed that feed intake did not affect. While final body weight and body weight gain of duck feeding beluntas leaf meal 0.5%+vitamin E 400 IU highest obtainable was the best feed conversion.
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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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