Judul: Pengaruh Taraf  Tepung Tanaman Tarbangun (Coleus amboinicus Lour) Dalam Ransum Dan Waktu Pemberiannya Yang Berbeda Terhadap  Produksi Air Susu Induk Babi
Abstrak: Tarbangun (Coleus amboinicus Lour) plant can be utilized to increase milk production of sow during lactation period. Sufficiency of milk production can reduce the death risk of newborn piglets. The research conducted from June to Agust 2010 in PT. Adi Farm Jl. Raya Solo, Seragen, Jawa Tengah. The design of this research was complete random design method with two factor: level of tarbangun meal (0, 2.5, 5 and 7.5%) and feeding time (after 107 days of pregnancy and postnatal). The result show that addition tarbangun meal in sow’s diet had very significant (P<0.01) effect on sow feed consumption and significant (P<0.05) effect on day milk production, lactation milk production and interaction of level and feeding time on litter size at weaning. The result show that addition tarbangun meal in sow’s diet hadn’t significant effect on milk production/suckling period, litter size at birth, pig weight at birth and mortality. Result of this research showed that at level 5% after 107 days of pregnancy, tarbangun meal in sow’s diet gave highest milk production.
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Judul: Pengaruh Taraf Pemberian Tepung Daun Bangunbangun (Coleus Amboinicus Lour) Dalam Ransum Induk Babi Menyusui Terhadap Nilai Ekonomi Penampilan Anak Babi Sapihan
Abstrak: In the tropic, there was a wild plant called bangun-bangun. This plant is belived could increase the milk production of mammal, especially milk production of woman whose feeding their baby. The aim of this research is to study the economy influance of bangun-bangun leaf meal which is added to the sow’s diet at different level (0; 1,25; 2,5; and 3,75%). The design of this research was completely random design with four replication. The observed parameter was litter size, sow feed intake, litter weight at birth, litter weight at weaning, litter weight gain, milk production, body weight gain, feed cost, total production cost and the weaned piglet economy effect. Result of this research showed that at level 1,25% bangun-bangun leaf meal in sow’s diet, gave biggest profit than another level in economy of weaned piglet. The profit of a weaned piglet can increase until 17,21% from the usual advantage (level 0%). Bangun-bangun leaf meal in sow’s diet didn’t have significant effect on litter size, sow feed intake, litter weight at birth, pig weight at weaning, litter weight gain, milk production and body weight gain. Keywords : Bangun-bangun leaf meal, weaned piglet and weaned piglet economy effect
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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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