Judul: Perencanaan pengembangan peternakan sapi potong di Distrik Kebar Papua Barat menggunakan peta arahan penggunaan lahan
Abstrak: Districk Kebar is an area in Papua Barat. Districk Kebar has land use map that can used for made a plann to developed livestock. The land use map made by Pusat Penelitian dan Pengembangan Tanah dan Agroklimat. The map used as reference. The results of calculation showed that Districk Kebar can carrying 72.987 Animal Unit (AU). Metode was used in this research was based on potential productions of plants and potential carrying capacity of calf. Material of research used were landset map and microsoft excel. In this place can be developed livestock. The result showed that potential production of plants in Kebar can provided forage for CCO are 60.712 AU, VBC are 3.683 AU, and VFC are 8.593 AU.
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Judul: Potensi Pengembangan Sapi Potong di Kabupaten Sijunjung Propinsi Sumatera Barat
Abstrak: Agricultural land in Sijunjung District that has not been optimally utilized could be used for the development of beef cattle farm. The development should conform land suitability as a reference to determine beef cattle development to achieve the government's target of meat self-sufficiency in 2010. This study aims to foresee the potential of land in Sijunjung District for development of beef cattle using a combined 2006 Landsat images, LREP maps and other supporting data through, financial analysis, and the desired rearing cattle the local community. The results indicate that the potential lands for the development were about 120,063 ha or 38.35% of the existing land area, which consists of mixed garden (100,359 ha), 3,247 ha of abandoned land, 11,027 ha of paddy fields and 5,428 ha of bush. Actualy, land carrying capacity is 55,518 Animal Unit, and the potential carrying capacity is 134,722 Animal Unit. The results of the NPV analysis for all farming schemes were positive, with B/C Ratio> 1, and the IRR> outweighed the applicable interest rate. Assessment using AHP showed that the caging system was preferable (0.650) than shepherd-based farming (0.350) with a value of inconsistency about 0.05.
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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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