Judul: Kualitas Karkas Kambing Kacang dan Domba Garut yang Digemukkan Menggllnakan Pakan Mengandung Konsentrat Bulir Sorgum
Abstrak: Sorghum is one of cereal plant that has big potency as feed for sheep and goat. The objective of the research was to evaluate carcass quaiity of kacang goat and gamt sheep fed with concentrate contain sorghum grain. Total twelve kacang goat and gamt sheep were used for the research. Data of carcass quality were collected and analyzed by Analysis of COvariance (ANCOVA) with initial body weight, slaughter weight and half carcass from left side weight were used as co variable. Result shows that kacang goat had lower average daily gain (ADG) than gamt sheep (P<0.05). Carcass percentage of kacang goat with average slaughter weight 17.17 kg was 38.65% with percentage of lean, fat bone from carcass were 62.44%, 10,56% and 27% respectively. Whcreas carcass percentage of garut sheep with average slaughter weight 23 .70 kg was 40.55% with percentage of lean, fat bone from carcass were 60.48%, 16.71 % and 22.81 % respectively. In addition, the data for commercial carcass cuts showed that percentage of leg cut from kacang goat was significantly lower than garut sheep (P<O.OI), whereas muscle (lean) percentage of leg and shank cuts from kacang goat was significantly higher than garut sheep (P<O.OI). In contrast, rack cuts from kacang goat was significantly lower than garut sheep (P<O,OI). Bone percentage of shoulder, rack, loin and breast cuts were very significantly higher for kacang goat than garut sheep (P<O.OI).
Keyword: Bogor Agricultural University (IPB), Carcass, Concentrate contain shorgum grain, garut sheep

Judul: Pertumbuhan, Komposisi Tubuh, Produksi Karkas dan Kualitas Daging Domba Garut dengan Manajemen Pemberian Pakan Berbeda
Abstrak: Pemanfaatan limbah tauge dapat dijadikan sebagai pakan alternatif pengganti sumber serat. Pemberian pakan sore hari dengan suhu yang lebih nyaman diduga dapat meningkatkan produktivitas ternak. Penelitian ini bertujuan untuk membandingkan pengaruh jenis pakan dan waktu pemberian pakan terhadap pertumbuhan, komposisi tubuh (air, protein dan lemak), produksi dan komposisi karkas serta komposisi kimia daging pada domba garut jantan masa pertumbuhan. Penelitian menggunakan 12 ekor domba garut jantan dengan rataan bobot badan awal 16.76 ± 2.09 kg (Koefisien Keragaman = 12.47%), umur 6-7 bulan. Dua jenis pakan yang digunakan disusun isoprotein (14%) dan isoTDN (65%), R1 (40% rumput lapang + 60% konsentrat) dan R2 (40% limbah tauge kacang hijau + 60% konsentrat). Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) pola faktorial, 2x2. Faktor pertama adalah 2 jenis pakan (R1 dan R2), serta faktor kedua adalah waktu pemberian pakan, yaitu pagi hari (P) dan sore hari (S). Masing-masing perlakuan terdiri dari 3 ulangan. Pengaruh pakan dan waktu terhadap pertambahan bobot badan, komposisi tubuh, produksi karkas dan komponennya serta komposisi kimia daging dipelajari dengan analisis ragam. Komposisi kimia daging dan lemak karkas yang diperoleh secara pemotongan dengan komposisi tubuh yang diperoleh melalui metode ruang urea dicari hubungannya menggunakan uji korelasi-regresi. Hasil penelitian menunjukkan bahwa tidak ada interaksi antara jenis pakan dan waktu pemberian pakan terhadap produktivitas domba. Pakan mengandung limbah tauge nyata meningkatkan pertambahan bobot badan, persentase dan komposisi karkas (daging, lemak), serta menurunkan konversi pakan. Waktu pemberian pakan sore hari menghasilkan daging karkas yang sangat nyata lebih tinggi (P<0.01) daripada pagi hari. Hubungan antara bobot hidup, komposisi tubuh dengan komposisi karkas dan kimia daging adalah nyata. Hubungannya mengikuti persamaan sebagai berikut: lemak karkas (%) = 0.143 bobot hidup - 0.660; lemak karkas (%) = 4.286 lemak tubuh - 82.021 dan protein daging (%) = 424.98 - 27.32 protein tubuh. Pemberian limbah tauge dalam pakan secara nyata meningkatkan performa dan dapat dijadikan sebagai pakan alternatif pengganti rumput.
Keyword: body composition, carcass, feeding time, mung bean sprouts waste, sheep

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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