Judul: Pengaruh penambahan tepung tanaman bangun-bangun (Coleus amboinicus Lour) dalam ransum terhadap penampilan reproduksi induk dan anak babi menyusu
Abstrak: Coleus amboinicus Lour has been used as a breast milk stimulant (a lactogogue) by Bataknese people in North Sumatera for houndreds years. The main objective of this study was to investigate the effects of sow dietary addition with bangun-bangun plant meal (Coleus amboinicus Lour) on the reproduction performance of sows and its piglet development preweaning. The design of the research was completely random design factorial (4 x 2) with three replication. The first factor was percentage of addition of bangun-bangun plant meal in feed (0, 2.5, 5 and 7.5%) and the second factor was given time of feed (on day 107th pregnant and day of giving birth). Addition of bangun-bangun plant meal had significant effects (P<0.05) to decrease on birth mortality. The given time of bangun-bangun plant meal in sow feed had significant effects (P<0.05) on early time weaning to estrus interval. Interaction of two factor had significant effects (P<0.05) to increase sows and piglets feed intake, milk production, piglet weight gain per litter, weight at weaning per litter and litter size at weaning but treatment did not affects on gestation and birth time, weight of piglet at birth, litter size at birth, mortality before weaning, sow reproduction cycle and decrease of sow weight. Effects of sow feed addition with 5% bangun-bangun plant meal on day 107th pregnant improve the performance of sows and piglets.
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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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