Judul: Analisis Pola Penyediaan, Ketersediaan, dan Jenis Vegetasi Hijauan Pakan pada Peternakan Sapi Perah di KUD Mandiri Cipanas, Kabupaten Cianjur, Jawa Barat
Abstrak: KUD Mandiri Cipanas is a corporation which organized dairy farmers from districts in Cianjur, which are Cipanas, Sukaresmi, and Pacet. The aim of this research was to evaluate and analize the pattern of forage management based on the level of ownership of forage, forage potential, diversity analysis, and three types of forage in the three districts. This study used descriptive analysis, forage botanical composition analysis, capacity analysis of location based on Nell and Rollinson methods, and vegetation analysis. Pattern of forage management dairy cattle in KUD Mandiri Cipanas is cut and carry. Based on population of dairy cattle, avaibility of foragenon large and medium farms are from grass land farm (GRF), and tropical grass for small farms. There is no correlation between cutting capacity and ownership of livestock. The most dominant in enclosure is Penisetum purpureum Schum, while the rumbah grass dominant on the land
Keyword: forage, diversity analysis, dairy cattle, composition botany, carrying capacity

Judul: Analisis Potensi dan Pemanfaatan Hijauan Pakan pada Peternakan Domba Rakyat Desa Randobawa Ilir Kecamatan Mandirancan, Kabupaten Kuningan, Jawa Barat
Abstrak: Randobawa ilir is one of the villages in Kuningan Regency where found sheep breeding farm. The aim of this experiment was analyzing potential and utilitazion of forage on sheep breeding farm in Randobawa Ilir village as a feed of ruminant forage. This experiment used descriptive analysis, composition botany analysis, analysis of carrying capacity, and diversity analysis. The results of composition of botany showed that the first rank of forage was Eragrostis sp. as many as 14.01%, the second was Digitaria sp. as many as 9.96%, and the third was Mikania micrantha H.B.K. as many as 9.90%. The result of analysis of carrying capacity showed that Randobawa Ilir village still allowed for addition of livestock as many as 129.39 AU. The result of diversity analysis showed that diversity on paddy field higher than farm. The highest importance value on paddy field was Cynodon dactylon L. Pers. as many as 31.53% and the highest importance value on farm was Oplismenus burmannii (Retz.) P. Beauv as many as 68.64%.
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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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