Judul: Karakteristik Karkas dan Non Karkas Domba Ekor Tipis Betina dengan Bobot Potong yang Berbeda di TPH Maleber Bogor
Abstrak: The purpose of the research was to evaluate the characteristics of carcass and non carcass of thin-tailed sheep (DET) on different live weight in TPH Maleber, West Java. Research used 56 heads of DET ewes. The sheep grouped into live weights at 10 kg, 20 kg and 30 kg. Data were analyzed by Analysis of Variance (ANOVA). The result of the research showed that the differences of live weight were significantly (P<0.01) influenced on empty body weight and carcass weight. DET that were slaughtered at 30 kg was heavier on carcass percentage compared to 20 kg. The average percentage of carcass at live weight 10 kg, 20 kg and 30 kg was 46.09%, 42.87% and 49.56% respectively. Non carcass components of DET were slaughtered at 30 kg was significant (P<0.01) heavier than live weight of 20 and 10 kg. The percentage of edible portion of non carcass was of 42%-48% of empty body weight.
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Judul: Karakteristik Karkas dan Non Karkas Domba Ekor Tipis Berdasarkan Body Condition Score di TPH Maleber Bogor
Abstrak: Body condition score (BCS) is one indicator to know high or low of fat and meat deposit on carcass and non carcass from an animal. The purpose of the research to evaluated carcass and non carcass characteristic of thin-tailed sheep (DET) on Body condition score (BCS) effect at slaughter house Maleber, Bogor. Research used 99 heads of DET. The sheep grouped into 3 group BCS, thin (1), medium (2) and fat (3) . Data were analyzed by Analysis of Variance (ANOVA). The result showed DET with BCS 3 (fat) were significant different higher live weight, carcass weight, and empty body weight from the other BCS (thin and medium). Carcass’s percentage on BCS effect showed same value from efect value of BCS 1, 2, and 3 . The differences of body condition score effect to non carcass characteristic were significantly (P<0.01) on weight and diverse on percentage whereby on the percentage of liver and rumen is different (P<0.05) but peresentase other components except heart, spleen and skin very different (P<0.01) . The percentage of weight from spleen, skin, and blood is not effected by BCS.
Keyword: thin-tailed sheep., non-carcass, carcass, body condition score (BCS)

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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