Judul: Uji sifat fisik pemalsuan pollard
Abstrak: Nowadays, the forgery of feedstuffs is a big problem in the feed industry, because of forgery can decrease the feed safety and quality that. The purposed of this research was to study more accurately the benefit of phisically characteristic to evaluate the quality of pollard. This experiment was conducted at feed Industry Laboratory and Feed Science and Technology Laboratory from March to April, 2007. A completely randomized Design with five treatments and four replications was used in this experiment.
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Judul: Karakteristik sifat fisik jagung, dedak padi dan pollard
Abstrak: Physical properties of feed are important aspect in feedrnill industry. To meet a high efficiency in feed handling, storage, processing and to reduce looses during processing needed the information on chemical composition, nutritive value and physical properties of feed. The experiment was carried out to determine the physical properties of corn , rice brand and pollard from different moisture content. Corn, rice brand and pollard were collected from two factories. Specific gravity, bulk density, compacted bulk density, angle of repose and floating rate of the groups were determined. The data were statistically analyzed using the analysis of variance in completely randomized factorial design. The results of the experiment showed the physical properties of corn are, specific gravity (1260.30 g/l and 1213.83 dl), bulk density (561.55 gfl and 576.608/1), compacted bulk density (784.43 g/l and 797.08 gll), angle of repose (38.20' and 38.69'), floating rate (3.18dsec and 4.04 dsec). While at rice brand between two companies have specific gravity (1 106.45 g/l and 1066.38 dl), bulk density (270.0 g/l and 362.5 gll), compacted bulk density (425.0 g/l and 557.5 dl), angle of repose (45.4689' and 43.4680°), floating rate (3.5908 dsec and 4.0650 dsec), and specific gravity (1068.75 g/l and 1149.05 dl), bulk density (292.5 gll and 295.0 gh), compacted bulk density (437.5 g/l and 450.0 dl), angle of repose (37.3634' and 44.9312'), floating rate (3.0607 dsec and 3.4043 dsec) for pollard respectively. Keywords : moisture content, specific gravity, bulk density, compacted bulk density, angle of repose, floating rate
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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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