Judul: Analisis Risiko Produksi pada Peternakan Ayam Broiler di Kampung Kandang, Desa Tegal, Kecamatan Kemang, Kabupaten Bogor, Jawa Barat.
Abstrak: Poultry is an important sub sector in contributing to GDP. One of poultry commodities which has big potential is broiler farm. Bogor District is one of broiler production central in West Java with growth rate about 7.75%. Meanwhile, broiler production in Bogor District is fluctuation. The purpose of this research is to analyze the risk of production sources, analyze the probability of risk source, and analyze the impact of risk sources in Kampung Kandang. Risk analysis broiler production was examined using primary data and secondary data. Primary data obtained through observation, interviews, discussions, and questionnaires with the farmers, while the secondary data obtained from the relevant literature. Method of data analysis on this research use descriptive analysis of the data using qualitative and quantitative risk analysis using the data. The sources of risk found broiler production is a weather, disease, and predators. Disease are a source of risk that may occur and the greatest impact, amounting to 91.62 percent and Rp 7 857 249. The results of mapping risk indicate that there are two kinds of management strategies such as preventive and mitigation strategies. In conducting a proposed strategy, the farmers should do strategy by prioritizing strategy that is caused by a source of risk of disease
Keyword: broiler, risk sources, Production risk analysis

Judul: Analisis Risiko Produksi Peternakan Ayam Broiler Di Kecamatan Ciampea, Kabupaten Bogor
Abstrak: Ciampea is one of the main areas centre broiler production in Bogor Regency. Fluctuation product in Ciampea indicates production risk. The risk analysis of broiler chicken production is investigated by using primary and secondary data. Data analysis method used is descriptive analysis by using qualitative data and quantitative. Then risk analysis by using quantitative data. Based on the observation in the research site, risk sources of broiler chicken are disease, climate, pest, and quality of DOC. Disease outbreaks is the risk sourcethat probably happens and the biggest effect that is 46% and at least Rp15 628 053. The risk mapping result shows that disease, climate and DOC can be solved with preventive strategy.
Keyword: preventive strategy, risk sources, Risk analysis production

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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