Judul: Komponen Karkas dan Sifat Fisik Daging Sapi PO dan Kerbau Rawa yang Digemukkan Menggunakan Ransum yang Disuplementasi Campuran Garam Karboksilat Kering
Abstrak: Peranakan Ongole cattle and buffalo are meat producing ruminants commonly found in Indonesia. The study was aimed to examine the carcass yield and meat quality from local cattle and buffalo fattened on feedlot ration supplemented by protected lemuru fish oil in the form of dried carboxylate salt mixture (DCM). They were fattened for approximately 2,5 month. The experiment used six swamp buffalo and eight Peranakan Ongole cattle. The data was analyzed by factorial design with two factor treatment. The first factor was species (cattle and buffalo) and the second factor was ration (supplemented and non supplemented ration with dried carboxylate salt). The result showed that they were no interaction between species and ration on carcass productivity and meat quality characteristics. Carcass productivity and meat quality characteristics were not influenced by ration treatment’s factor. However, bone, tenderness, meat color and fat color were significantly influenced (P<0,05) by species. Buffalo carcass contained less bone compare to Peranakan Ongole carcass. The meat from buffalo was significantly more tender, darker in color, and the fat was lighter in color compare to beef.
Keyword: 

Judul: Perdagingan dan Distribusi Daging Kerbau Rawa dan Sapi Peranakan Ongole yang Digemukkan Menggunakan Ransum dengan Suplementasi Campuran Garam Karboksilat Kering
Abstrak: Swamp buffalo is commonly regarded as an animal with relatively low productivity. The objective of the study was to examine the meat yield and it’s distribution within carcass from Swamp buffalo and Ongole Grade cattle fed concentrate containing protected lemuru fish oil in the form of dry carboxylate salt mixture (DCM). Fourteen animal were used in the study comparising eight Ongole Grade cattle and six Swamp buffalo. Each group of animal was allotted to control ration and control ration plus DCM. They were set up in a factorial design with species and ration as the factors. The result showed that administration of protected lemuru fish oil in the ration did not obviously influence meat yield and each distribution carcass. However Swamp buffalo had significantly higher slaughter weight but lower carcass weight (P<0,05). The Swamp buffalo carcass yield were significantly lower weight of striploin, tenderloin, silverside and topside if compared to Ongole Grade cattle.
Keyword: 

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.
Keyword: