Judul: Anal isis Risiko Diversifikasi Sayuran Organik Pada The Pinewood Organic Farm di Bogor, Jawa Barat
Abstrak: Vegetables as one of the parts of the horticulture and have a business opportunity if managed properly. Vegetables is one of the organic agricultural products of environmental friendly nature and get closer to nature concept, so as to provide a good quality assurance compared to conventional vegetables. Besides having the advantages of environmentally friendly farming organic vegetables have a pretty big obstacle is the high level of risk, including the risk of production. The purpose of this study was to analyze the activities of specialization and develop alternative strategies commodity diversification by presenting the right combination to reduce the magnitude of the risk of farming in the specialization of activities. Meanwhile, the risk measure used include opportunities, expected return, variance, standard deviation, and coefficient of variation. The results of the analysis indicate that the specialization of activities Broccoli is a commodity with the lowest coefficient of variation is equal to 0.17. The combination of Broccoli and Carrots are the most diversified activities lower risk than other commodity combinations
Keyword: Diversification, Risk, Organic, Horticulture

Judul: Diversifikasi sayuran organik sebagai alternatif mengatasi risiko usaha pada The Pinewood Organic Farm di Kabupaten Bogor
Abstrak: Risk is the possibility of adversity or loss, and refers to uncertainty that matters. Consequently, risk management involves choosing among alternative to reduce the effect of risk. One of indicator to know the existence of production risk is the fluctuation in productivity of brokoli, tomato, bayam hijau, and carrot. This study analyzes the risk of commodity production in the four selected in the Pinewood Organic Farm with a diversified approach to analyze the risk of production of more than one commodity. Fluctuations in production will lead to revenues received also fluctuates, will be calculated risks and confectionary risk through the implementation of risk management strategies. Risk analysis is a comprehensive step in the risk assessment process. This assessment begins with the calculation of odds, the value of expected return, until the value of the risk. The analysis tools is the variance (the variance), standard deviation (standard deviation), and the coefficient of variation (coefficient of variation). Measures of deviation is also aided by another measure, namely the calculation of the odds and expected return. The results of the risk analysis calculations show that the specialization of business spinach organic green vegetables have the highest risk level of the four commodities. Based on the comparison of the risk on the four organic vegetables broccoli, tomatoes, green spinach, and carrots are done Pinewood Organic Farm concluded that diversification can reduce risk. However, by diversifying no means eliminate the risk or create a risk to zero. Diversified production activities in the Pinewood Organic Farm has been effectively implemented by the company in an effort to deal with the risk. The strategy needs to be done by the company is to improve the management of the company, to cooperate or partner with other farmers and suppliers of organic vegetables.
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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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