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: Penampilan anak babi menyusu dari induk dengan ransum yang mengandung tepung daun bangun-bangun [Coleus amboinicus Lour] pada taraf yang berbeda
Abstrak: Tanaman bangun-bangun (Coleus amboinicus Lour) merupakan jenis tanaman herba, yang telah lama dikenal di beberapa daerah di Indonesia. Bangun- bangun ini dipercaya mampu meningkatkan produksi air susu ibu yang menyusui, terutama di daerah pulau Sumatera Utara. Penelitian ini dilakukan untuk mengetahui dan menentukan pengaruh pemberian beberapa taraf (0; 1,25; 2,5; dan 3,75%) tepung daun bangun-bangun (TDB) ke dalam ransum induk babi menyusui terhadap penampilan anak menyusu hingga penyapihan (30 hari). Peubah yang diamati dalam penelitian ini adalah konsumsi ransum induk, litter size lahir, bobot lahir, produksi air susu induk (PASI) babi, mortalitas, konsumsi ransum anak, litter size sapih, bobot sapih, pertambahan bobot badan anak (PBBA) dan laju pertumbuhan anak babi menyusu. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan empat perlakuan masing-masing empat ulangan. Data yang diperoleh dianalisa dengan menggunakan Analisis Ragam atau Analysis of Variance (ANOVA) menggunakan MINITAB 14, dan apabila terdapat perbedaan nyata akan dilanjutkan dengan uji lanjut Tukey. Berdasarkan hasil analisis ragam diketahui bahwa perlakuan tidak berpengaruh nyata terhadap konsumsi ransum induk babi, PASI babi, mortalitas, konsumsi ransum anak, litter size sapih, bobot sapih, dan PBBA babi menyusu. Hasil pengamatan berdasarkan peubah yang diamati menunjukkan bahwa perlakuan R3 (penambahan 2,5% TDB) mempunyai PASI yang lebih tinggi sebesar 1,33% dari R1 (kontrol).
Keyword: Bangun-bangun leaf meal, Performance of suckling piglets

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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