101Fatkhan102Wilmar SALIMWavelet Analysis for Biot’s Poroelastics Medium and Physical Model Using Core Samples of Sandstones Ngrayong Formation(Project 2014)Industrial Deconcentration in Bandung Raya Metropolitan Area(Project 2014)ratio (MFR) on SUPEL scenario for PWR spent fuel direct recycling scheme has been studied. The neutronics evaluation results then has been compared with that of JENDL 4.0 nuclear data library. The MFR of standard PWR results in the best criticality condition. The neutron spectra become harder with the decreasing of MFR.Various techniques have been developed to model wave propagation in poroelastic media. One type of method that is particularly versatile is finite difference. The two-dimensional partial differential equations of motion describing the propagation of waves in an elastic medium are approximated by suitable finite-difference equations, which can be solved on discrete spatial grid by numerical procedures. Finite difference approach is based on Biot theory who proposed a theory of acoustic wave propagation in saturated porous media. This modeling technique have unique parameters related to porous media that are easy to be performed and do not require high computing resource, however other techniques require a fairly high computing resource and could not easily reproduced.The aim of this research is to study the wavelet characteristics of Biot model comparing with equivalent modelling parameters from elastic modeling in Seismic Unix and data experiment using Sonic Viewer. Various types of sandstone from Ngrayong formation are tested as object of research and become input data for elastic wave propagation modeling in poroelastic medium. In addition, digital rock physics can be applied to calculate or estimate the porosity and permeability of reservoir rock without damaging the physical condition of the rock itself. The rock is scanned and saved in a digital form. The data is used to analyze the geometrical structure of the rock. Three imaging modes are microscopic analysis, the micro-CT scan, and the scanning electron microscopy. The models are calculated and simulated to see the effect of various conditions of the samples. The models are constructed based on their grain shape: spherical, ellipsoidal, and polygon or irregular shape. Four parameters compare models to the sample: grain size distribution, pore size distribution, degree of permeability anisotropy, and grain shape. All three models are compared with the sample by matching the similarity of the structural properties and fluid flow. Based on the result, only one model shows a similarity to the sample: the polygon shape. The polygon model shows a similarity to the sample, while the other models show significant discrepancies compared with the sample. Even though one parameter has a similar value between the model and sample, the three other parameters have the contrast value that helps improve the design of the model. In conclusion, three different models based on the characteristics of the sample could not be used to represent the rock. However, this research can be used to develop a more detailed model to represent a real rock.Urban expansion and development toward peripheral areas due to agglomeration may create new activity centers in the periphery, know as urban deconcentration phenomenon. It may shift the funcction of periphery to become centers of urban activities, such as residential, industrial, trade and services, or other activities. This study aims to identify to what extent such phenomenon occurring from the perspective of industrial activity development, by looking at the development of industrial centers in Bandung Raya Metropolitan Area (BRMA). Analytical methods used in this study are mainly the descriptive statistical analysis, Location Quotient (LQ) analysis, and employment-population ratio analysis. The result shows that industrial deconcentration has taken place in BRMA, indicated by the declining share of Bandung Municipality as core city in terms of large manufacturing activities, the growth of manufacturing activities in the periphery of BRMA, and the emergence of industrial centers in the periphery of BRMA. 74
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