Judul: Komposisi Jaringan Potongan Komersial Karkas Domba Ekor Tipis Jantan Umur Enam Bulan dengan Ransum Penggemukan Mengandung Indigofera sp. dan Limbah Tauge
Abstrak: The research aimed to study tissue composition in commercial cuts of the six month of male thin tailed lamb fattened on ration containing Indigofera sp. and sprouts waste. This experiment used eight thin tailed lamb raised for three months in individual cages. The data was analyzed by Analysis of Covariance (ANCOVA). Characteristics carcass corected with body weight before treatments were conducted, composition and distribution carcass corrected with chilled carcass weight. The result showed that the treatment did not significantly affect (P>0,05) carcass characteristics and composition. However, thin tailed sheep fed on ration with sprouts waste had significantly (P<0,05) heavier muscle in the rack and significantly lighter of fat in the leg (P<0,05) compared to those fed on ration contained Indigofera sp. Thin tailed sheep fed on ration with sprouts waste had significantly (P<0,05) higher percentage of bone in leg compared to those fed on ration contained Indigofera sp. Leg at thin tailed sheep fed on ration with Indigofera sp. had the best proportion commercial cut carcaas.
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Judul: Komposisi Jaringan pada Potongan Komersial Karkas Domba Garut dan Ekor Tipis Umur Sebelas Bulan dengan Ransum Penggemukkan Mengandung Indigofera sp.
Abstrak: Garut and Thin Tailed sheep are categorized as small ruminant animal. They are potential as meat producers. The aim of this research was to examine differences in tissue composition of commercial cuts from garut and Thin Tailed sheep aged 11 months and fattened on ration containing Indigofera sp. The study used four garut and four Thin Tailed sheep with initial body weight of 14,9 ± 1,1 kg and 13,6 ± 0,6 kg respectively (CV=10,14%). The experiment was set up ini completely randomized design. The animals were intensively fattened for three months in individual cages. They were fed ad libitum with pelleted ration contained Indigofera sp.. The sheep were slaughtered, dressed, and the chilled carcasses were cutted into seven commercial cuts and each cuts were dissecsed into muscle, fat, and bone. The results showed that there were no significantly differences in carcass muscle and bone weight, but carcass fat weight. Garut sheep had significantly (P<0,05) lower fat weight in the carcass compare to Thin Tailed sheep. The differences occured primaly in shoulder, loin, breast, and leg cuts. However on percentage bases, there were significant (P<0,05) between breed differences in carcass compotition. The garut sheep carcass contained significantly more muscle and bone, but less fat than those of Thin Tailed sheep.
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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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