Judul: Penggunaan Grafit Mesopori Berlapis Polianilin sebagai Elektroda pada Microbial Fuel Cell.
Abstrak: Microbial fuel cell is a device can generate electricity from organic components through the microbial catabolism. However, the low power density generated in the MFC system is to be one of the main obstacles. The aims study was to determine the excess graphite-coated mesoporous polyaniline as an electrode in the MFC system. This research was conducted by the method of chemical treatment in the formation of mesoporous structure of the graphite surface and electrochemical polymerization potensiostatic in graphite coating with polyaniline. This study resulted in the highest power density were 0.0059 mW.m-2 in the untreated graphite, 0.6 mW.m-2 in mesoporous graphite, 1.895 mW.m-2 in polyaniline coating and 3.557 mW.m-2 in graphite-coated mesoporous polyaniline. The results showed that formation of mesoporouse treatment on the surface of graphite and polyaniline coating on the graphite surface can increase the power density of the MFC system
Keyword: Bogor Agricultural University (IPB), power density, polyaniline, microbial fuel cell, Anode

Judul: Modifikasi Grafit Mesopori dengan Pelapisan Polipirol Sebagai Elektroda pada Microbial Fuel Cell Single Chamber
Abstrak: Microbial Fuel Cell (MFC) is an instrument that utilizes the microbial metabolism in generating electricity. Output of MFC is depend on the electrode that used in capturing the electrons. The treatment given to the graphite electrode are varying the KOH concentration during activation and varying of the applied voltage during electropolymerization. Based on the research, a graphite electrode that activated with the KOH ratio of 1:6 and polypyrrole coated at surface with voltage applied of 0.8 Volts, generates a voltage of 321 mVolts with the electric current of 170.4 μA. The amount of the voltage and electric current affected by the surface area of the electrode and the effect of voltage applied during polypyrrole coating process. Moreover, the microbial metabolism also has some effect on the amount of electricity that obtained.
Keyword: Bogor Agricultural University (IPB), polypyrrole., microbial fuel cell, electropolymerization, Electrical energy

Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
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