Judul: Karakteristik Karkas dan Non Karkas Domba Lokal Betina yang Berbeda Bangsa di TPH Maleber Bogor
Abstrak: A total of 119 local ewe which consist of 18, 76 and 25 garut sheep, thintailed sheep and fat-tailed sheep was used to evaluate the characteristics of carcass and non carcass at slaughterhouse in Maleber Bogor. The data were analyzed using Analysis of Covariance (ANCOVA), with slaughter weight as a covariable. The results showed that slaughter weight, carcass weight, empty body weight and carcass percentage among these breeds were no significantly different (P>0.05). There were no significantly differences among breeds in the weights of non carcass components, except kidney and shank. There were no significantly among breeds differences in percentage of non carcass components, except kidney percentage. In general, the garut sheep, thin-tailed and fat-tailed slaughtered at weight 20.46 kg, 15.73 kg and 15.98 kg had carcass percentages of 47.14%, 46.61% and 47.65%, and non carcass percentages of 33.56%, 32.73% and 33.32% respectively
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Judul: Karakteristik karkas dan non karkas Domba Lokal betina yang berbeda bangsa di TPH Maleber Bogor
Abstrak: Sebanyak 119 ekor domba lokal betina yang terdiri dari 18, 76 dan 25 ekor domba garut (DG), domba ekor tipis (DET) dan domba ekor gemuk (DEG) digunakan untuk mengevaluasi karakteristik karkas dan non karkas di tempat potong hewan (TPH) di Maleber bogor. Data karkas dan non karkas dianalisis menggunakan Analysis of Covariance (ANCOVA). Bobot potong domba sebagai covariable. Hasil penelitian menunjukkan bahwa bobot potong, bobot karkas. bobot tubuh kosong dan persentase karkas antarbangsa tersebut tidak berbeda nyata (P>0.05). Tidak ada perbedaan signifikan antar bangsa dalam komponen bobot bobot non karkas, kecuali ginjal dan kaki. Tidak terdapat perbedaan yang signifikan antar bangsa dalam persentase komponen non karkas, kecuali persentase ginjal. Secara umum, DG, DET dan DEG yang disembelih pada bobot potong 20.46 kg. 15.67 kg dan 15.98 kg menghasilkan masing-masing persentase karkas 46.62%, 46.77% dan 47.71%, dan persentase non karkas 33.56%, 32.73% dan 33.32%.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Breeds, Carcass, Local sheep, Non carcass, Slaughterhouse

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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