Judul: Pengelolaan Risiko Produksi Buncis Mini pada PD Pacet Segar, Kabupaten Cianjur
Abstrak: One of the important commodities of the horticulture sub-sector and has the opportunity to be developed includes vegetables. Mini bean, one type of vegetables, tends to increase its total production annually. Mini bean cultivation cannot be separated from production risks. PD Pacet Segar is one of the companies cultivating mini bean in Cianjur. This study is aiming at identifying risk sources of mini bean production, analyzing the possibility of risk occurrence and impact of risk source of mini bean production towards its revenue, as well as analyzing appropriate alternative strategies to address the mini bean production risks. The data analysis method used descriptive analysis and risk analysis. This study used primary data and secondary data, all of data is qualitative and quantitative data. Based on the field observations, the sources of risks in mini bean production included weather changes, seed quality, diseases, and pest attacks. Weather changes are a source of risk that may occur and have the greatest impact. The results of the risk mapping results indicated that there were two kinds of treatment strategies including preventive and mitigation strategies
Keyword: sources of risks, production risks, mini bean

Judul: Analisis Risiko Produksi Buncis Perancis di Firma Raja Buncis Desa Tajur Halang Kecamatan Tajur Halang Kabupaten Bogor
Abstrak: French bean is a vegetable comodition that people seek to supply market demand with high quality standard. The objective of this research is to identify the risk sources, the risk probability, the risk impact and handling strategy alternative that can be done to handle the risk production of French bean cultivation in Raja Buncis Firm. Results of risk sources identification are the risk sources of pests, disease and labor skill. The risk source of disease showed the highest point of probability which is 44.8%, as of the use of the z-score method. The biggest risk impact also caused by disease which is Rp. 5.283.132,388, as of the use of value at risk method or VaR. Every risk sources needs attention; most attention are given to the risk source of pests. The alternative of handling strategy for the risk source of pests and labor skill is preventive handling strategy while for the risk source of disease mitigation handling strategy prefrerred
Keyword: Bogor Agricultural University (IPB), z-score, value at risk, production risk, french bean

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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