Judul: Pengaruh Pemberian Musik Klasik terhadap Konsumsi Ampas Tahu dan Produksi Susu
Abstrak: Efek Mozart adalah suatu fenomena yang muncul di Amerika Serikat pada tahun 1993. Efek Mozart telah berkembang bahkan dinegara bagian Eropa menggunakan musik pada peternakan untuk meningkatkan produktivitas ternak. Tujuan penelitian ini adalah untuk mengetahui lama waktu konsumsi ampas tahu, jumlah mastikasi dan produksi susu yang dihasilkan oleh sapi perah. Penelitian ini menggunakan rancangan silang balik (switch back design), dengan tiga periode pengamatan. Parameter yang diamati dan diukur adalah lama waktu konsumsi ampas tahu, jumlah mastikasi dan produksi susu. Musik klasik Mozart Concerto for flute and Harp in D diberikan mulai pukul 12.00-15.30 WIB. Pemberian musik Mozart mempengaruhi lama waktu konsumsi ampas tahu dan jumlah mastikasi. Lama waktu konsumsi ampas tahu dan jumlah mastikasimenunjukkan perbedaan yang nyata (P<0.05) berdasarkan uji-t. Rataan lama waktu konsumsi dan jumlah mastikasi yaitu sebesar 25.91±10.10 menit dan 84.38±4.46 kali/menit periode perlakuan. Produksi susu yang dihasilkan tidak memiliki perbedaan nyata (P>0.05), rataan produksi susu yang dihasilkan sebesar 6.805±0.90 liter pada periode perlakuan. Pemberian musik klasik Mozart meningkatkan efesiensi pakan, sehingga dapat memperbaiki kinerja sapi perah.
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Judul: Efek Pemberian Musik Klasik terhadap Produksi dan Komposisi Susu Sapi Fries Holland
Abstrak: Milk production in Indonesia did not been able to meet all consumer needs. Production and composition of cow's milk could be improved in various ways. Several studies in the UK showed that using classical music can make cows feel calm. Therefore, this study was carried out to determine the effect of classical music on the production and composition of milk. The study was done for 45 days, divided into 3 periods: pretreatment period, treatedperiod, and post period of classical music. The results showed that there was a significant increased in milk production. Tests on the milk compositions parameters of protein, lactose, solid, and density was not significantly different (P> 0.05), but the fat content was significantly increased (P <0.05).
Keyword: milk production., milk compositions, classical music

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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