Judul: Analisis Risiko Produksi Jamur Tiram Pada Cv Jaya Makmur Kecamatan Megamendung Kabupaten Bogor Jawa Barat
Abstrak: Oyster mushroom is one type of vegatables that began enthused by the people of Indonesia. White oyster mushroom is often used as an alternative to replace that meat because the fat content is lower so that more healthy to eat. CV Jaya makmur is one the companies in Bogor that runs the white oyster mushroom cultivation business. CV Jaya Makmur productivity is fluctuating in each cropping period. The purpose of this study is to identify the sources of ptoduction risk, analyzing the probability and impact of risk, and also risk management strategies to analyze alternatives to the cultivation of oyster mushroom on CV Jaya Makmur. Measurement of risk in studies conducted using measuring instrument such as standard deviation, z-score, and Value at Risk (VaR). The sources of the risk identified consists of the failure of the sterilization process, disease, pests, and temperature. Probability for each source of risk is as follows, 42.9% for sterilization failure, 39% for the disease, 39.7% for pests, and 30.2% for temperature. The analysis of the impact of the risk is Rp 139 460 820 for sterilization failure, Rp 72 053 666 for the disease, Rp 16 472 735 for pests, and Rp 18 594 727 for temperature. Preventive treatment strategies can be performed for all sources of risk, whereas handling mitigation strategies is only need to be done at the source of production of failure of sterilization and disease
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Judul: Analisis Risiko Produksi Jamur Tiram Putih pada CV Wahyu Makmur Sejahtera Desa Gadog Kecamatan Ciawi Kabupaten Bogor Jawa Barat
Abstrak: Oyster mushroom cultivation in CV Wahyu Makmur Sejahtera has a success rate varying in their production processes. The result of diverse production affects the amount of productivity that causes the fluctuations. Fluctuations in productivity is one indication of the production risk. There is a risk on CV Wahyu Makmur Sejahtera then identified each source of risk. Sources of risk then analyzed probability and impact to the method of qualitative analysis and quantitative analysis of the z-score method and var. Results of the analysis is performed to handle the risk management strategies on oyster mushroom cultivation. Based on the results of the research, it is known, there is a source of risk that the company is the production process of labor skills, pests and disease,nor the composition and quality of raw materials. While based on the results of the qualitative analysis is the calculation of probability using the z-score method, the value of the probability and impact of each - each source of production risk from the largest to the smallest, namely (1) the skills workforce by 42,5 percent and Rp 10,914,644; (2) pests and diseases by 36,3 percent and Rp 10,069,894, and (3) the composition and quality of raw materials by 17,4 percent and Rp 13,251.714.
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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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