Judul: Rancang Bangun Model Pemisah Bahan Plastik dan Bahan Organik dengan Metode Silinder Panas
Abstrak: Nowadays, garbage waste problems it’s one of issue that concerns with every country in the world, included Indonesia. Volume of garbage waste to increase but minimum waste control is the most perceived problems due to the waste bin. One of garbage type needing to be taken seriously waste controls is plastics, beside of organic waste. Plastics waste need a waste controls because plastics included in non degradable waste. Need long time to make plastics become unraveled. One solution that can be applied in the handling this problems is recycling this waste. However, separating the plastic waste to the other waste are a new issues that arise during the recycling process, it required an equipment to separating plastic waste from organic waste. That equipment do not exist, requires an initial research to find method that can be applied in separating plastic and organic materials. Heat-cylinder methods it’s one of method can be applied when separating plastic and organic materials. This research has aims to design and build a model of plastic and organic materials separator used heat cylinder method. It has a basis for development into a plastic garbage separator. In the design separator model of plastic and organic materials by heat-cylinder method it’s required other constituent components so that the separation process can be performed. The other components include hoppers, scrubbers, crank and the media end of the reservoir. Separation process will be beginning sheltered plastics and organic materials into the hopper. Furthermore these materials will flow into the heat-cylinder, which was spun by the crank rotation. Rotation of the cylinder heat helps in drainage material in the hopper. Heat in the cylinder has makes plastics stuck in a round of heat-cylinder and it has separated again when it comes to the scrubber and after that followed to the end storage media. As for the organic material will flow directly into end storage media when beginning process.
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Judul: Analisa Termal pada Rancang Bangun Reaktor Pirolisis untuk Memproduksi Bahan Bakar Minyak dari Limbah Plastik
Abstrak: The increasing amounts of plastic wastes generate enormous environmental problems. The pyrolysis can potentially be used to convert plastics into valuable chemicals and fuels. Almost all of the pyrolysis experiments conducted in laboratory condition, and the heat transfer is not investigated. The objectives of this study were to design temperature profile model using Computational Fluid Dynamics (CFD) and analyze its temperature distribution. Reactor was designed as an experimental set-up. For performance test, temperature was maintained in 5 difference level with 3 hours of production process. The result showed that the highest fuel yield produced from 450 pyrolysis temperature with 21.32 g of fuel yield. Each level of temperature degrees have almost similar temperature distribution pattern with temperature decreased vertically to the top of reactor. The result showed that validation using CFD simulation was approaching the value of temperature measurement on reactor.
Keyword: Bogor Agricultural University (IPB), CFD simulation, temperature distribution, pyrolysis reactor, plastic waste, Fuel

Judul: Asymptotic Distribution of Estimator for the Intensity Function of a Doubly Periodic Poisson Process
Abstrak: In this manuscript, estimation of the intensity function of a doubly periodic Poisson process is discussed. It is assumed that only a single realization of the Poisson process is observed in a bounded window [0,n]. It is also assumed that the period of the intensity function is known. The rate of consistency and asymptotic normality of the estimator are formulated. Finally, a confidence interval for the local intensity function is also formulated.
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