Judul: Kecernaan Nutrien dan Status Fisiologis Domba Akhir Kebuntingan dengan Ransum Flushing Minyak Sawit dan Minyak Lemuru
Abstrak: Penelitian ini bertujuan untuk mengevaluasi kecernaan nutrien dan status fisiologis domba lokal akhir kebuntingan dengan ransum flushing minyak sawit dan minyak lemuru. Ternak digunakan 12 ekor domba lokal betina akhir kebuntingan dengan bobot 43.58±5.57 kg ditempatkan di kandang individu. Penelitian ini menggunakan rancangan acak kelompok (RAK). Perlakuan terdiri atas 4 perlakuan dan 3 ulangan. P1= Ransum kontrol (hijauan + konsentrat), P2= Ransum kontrol + suplementasi minyak sawit 6%, P3= Ransum kontrol + suplementasi 3% minyak lemuru dan 3% minyak sawit, P4= Ransum kontrol + suplementasi minyak lemuru 6%. Peubah yang diukur meliputi konsumsi, kecernaan nutrien dan status fisiologis. Data diperoleh dianalisis menggunakan ANOVA dan apabila data berbeda nyata diuji lanjut menggunakan uji Duncan. Hasil menunjukan bahwa penambahan minyak sawit dan minyak lemuru dalam konsentrat pakan berpengaruh terhadap konsumsi lemak kasar, konsumsi Beta-N, kecernaan bahan kering dan kecernaan lemak kasar, namun tidak berpengaruh terhadap konsumsi bahan kering, konsumsi protein kasar, konsumsi serat kasar, kecernaan protein kasar, kecernaan serat kasar, kecernaan Beta-N dan nilai TDN serta tidak berpengaruh terhadap status fisiologis. Disimuplkan bahwa penggunaan 6% minyak sawit dalam ransum dapat meningkatkan konsumsi lemak kasar dan kecernaan lemak kasar pada induk domba bunting.
Keyword: digestibility, ewes, flushing, oil, physiological status

Judul: Nutrient Digestibility of Late Pregnancy Local Ewes Fed  Flushing Ration with Different Frequency
Abstrak: Tujuan dari penelitian ini adalah mengevaluasi kecernaan nutrien pada domba lokal fase akhir kebuntingan yang diberi ransum flushing dengan frekuensi pemberian yang berbeda. Penelitian ini menggunakan 12 domba lokal fase akhir kebuntingan, dengan rataan bobot badan 49,96 kg ± 9,67. Penelitian ini menggunakan Rancangan acak kelompok (RAK) dengan 4 x 3, yaitu P1 (tanpa flushing), P2 (flushing pada saat sebelum dan sesudah kawin), P3 (flushing pada saat sebelum dan sesudah kawin, dan pertengahan kebuntingan), dan P4 (flushing pada saat sebelum dan sesudah kawin, pertengahan, dan akhir kebuntingan). Konsentrat flushing mengandung 2% minyak kelapa dan 5% minyak ikan lemuru. Parameter yang diukur yaitu konsumsi nutrien dan kecernaan nutrien. Data yang diperoleh dianalisis menggunakan ANOVA dan apabila berbeda nyata diuji lanjut menggunakan uji Duncan. Hasil menunjukkan perlakuan nyata mempengaruhi (P<0,05) konsumsi lemak kasar dan kecernaan bahan kering, protein kasar, serat kasar, dan BETN, tetapi tidak nyata mempengaruhi konsumsi bahan kering, protein kasar, serat kasar, dan BETN, serta kecernaan lemak kasar. P3 meningkatkan kecernaan bahan kering, protein kasar, serat kasar, dan BETN. P4 meningkatkan konsumsi lemak kasar dan cenderung meningkatkan kecernaan lemak kasar, The aim of this research was to evaluate the nutrient digestibility of late pregnancy local ewes given flushing ration with different frequency. This research used 12 local ewes in the late pregnancy, with average body weight 49,96 ± 9,67 kg. This research used a Randomized block design (RBD) with 4 x 3 . The treatments were P1 (without flushing), P2 (flushing at the before and after mating), P3 (flushing at the before and after mating, and middle of pregnancy), and P4 (flushing at the before and after mating, middle, and end of pregnancy). Concentrate flushing containing 2% coconut oil and 5% Lemuru fish oil. The measured parameters were nutrient consumption and nutrient digestibility. The data were analyzed using ANOVA and any significant differences were further tested using Duncan Test. The result showed that the treatments significantly affected (P<0,05) the consumption of crude fat and digestibility of dry matter, crude protein, crude fiber, and N-free extract, but it did not affect the consumption of dry matter, crude protein, crude fiber, and N-free extract, as well as the digestibility of crude fat. In conclusion, P3 increased digestibility of dry matter, crude protein, crude fiber, and N-free extract. P4 increased nutrient consumption of crude fat.
Keyword: Flushing, Lemuru fish oil, local ewes, nutrient consumption, nutrient digestibility

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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