Judul: Efek Pemberian Biskuit Biosuplemen terhadap Daya Cerna Ransum, Kadar Laktosa dan Kalsium Susu pada Kambing Peranakan Etawah
Abstrak: Kualitas pakan mempengaruhi produksi dan kualitas susu. Pada musim kemarau, kualitas pakan relatif rendah. Oleh sebab itu, peternak membutuhkan pakan efektif dan efisien untuk ternak. Penelitian ini bertujuan untuk meningkatkan kualitas susu kambing perah (kambing Peranakan Etawah) dengan penambahan biskuit biosuplemen pada pakan ternak. Biskuit biosuplemen adalah pakan kering berbentuk seperti biskuit, aman dan mudah ditangani. Biskuit biosuplemen merupakan ransum komplit, terdiri dari daun papaya, Indigofera sp., konsentrat dan premix. Penelitian ini dilaksanakan pada bulan Mei sampai dengan Agustus 2013 di Cordero Farm, Ciapus, Bogor. Perlakuan terdiri dari T0 (pakan basal + tanpa biskuit) dan T1 (pakan basal + biskuit 15%), digunakan Uji T untuk analisis data. Penelitian ini menunjukkan bahwa penambahan biskuit biosuplemen secara signifikan mempengaruhi kecernaan bahan kering ransum (p<0.05) tetapi tidak berpengaruh terhadap kecernaan bahan organik ransum (p>0.05). Penambahan biskuit dapat meningkatkan kadar Ca susu (p<0.05) tetapi penambahan biskuit tidak mempengaruhi kadar laktosa susu (p>0.05).
Keyword: biskuit, biosuplemen, kalsium, susu, kualitas susu

Judul: Pengaruh Penambahan Biskuit Biosuplemen Pakan terhadap Produksi Susu dan Pertambahan Bobot Badan Kambing Peranakan Etawah (PE).
Abstrak: The main constraints of farmers in the tropics to produce high milk production is feed availability and quality mainly during the dry season. Biscuits biosupplements is one product of feed technology as an alternative solution to provide nutritious, durable and easily stored feed. The objectives of this study were to know the effect of biosupplements biscuits to goat milk production. A randomized complete block design with four treatments and three replications used in this study. The treatment were R0= 0% biscuits biosupplement, R1= 5% biscuits biosupplement, R2= 10% biscuits biosupplement and R3= 15% biscuits biosupplement. Measured variables such as milk production and body weight gain. The results showed that treatment of biscuits biosupplement feeding was significant on increase milk production at the end of the study (P<0.05), but no significant to the body weight gain (P>0.05).
Keyword: milk production, goat, body weight gain, biscuit, biosupplements

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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