A time-splitting approach for advection–dispersion equations is considered. The dispersive and advective fluxes are split into two separate partial differential equations (PDEs), one containing the dispersive term and the other one the advective term. On triangular elements a triangle-based high resolution Finite Volume (FV) scheme for advection is combined with a Mixed Hybrid Finite Element (M...

On-site wastewater treatment systems (OWTS) work by first storing the wastewater in a septic tank before releasing it to soils for treatment that is generally effective and sustainable. However, it is not clear how the abundance of E. coli changes during its passage through the tank. In this study, which was conducted under the UGA young Scholar Program in summer of 2010, we examined the change...

A crucial trade-off is involved in the design process when function approximation is used in reinforcement learning. Ideally the chosen representation should allow representing as close as possible an approximation of the value function. However, the more expressive the representation the more training data is needed because the space of candidate hypotheses is bigger. A less expressive represe...

A high-order Galerkin Least-Squares (GLS) finite element discretization is combined with massively parallel implicit solvers. The stabilization parameter of the GLS discretization is modified to improve the resolution characteristics and the condition number for the high-order interpolation. The Balancing Domain Decomposition by Constraints (BDDC) algorithm is applied to the linear systems aris...

Due to a variety of potential scientific and industrial applications, a new phase of titanium dioxide (TiO2) would be very exciting. I have investigated a powder sample, which based on preliminary chemical and structural analyses, appeared to be such a new phase. Through subsequent high-resolution x-ray powder diffraction, energy dispersive x-ray spectroscopy, and electron diffraction measureme...

The Transition Edge Sensor (TES)-Energy Dispersive Spectrometer (EDS) is an X-ray detector with high-energy resolution (12.8 eV). The TES can be mounted to a scanning electron microscope (SEM). The TES-EDS is based on a cryogen-free dilution refrigerator. The high-energy resolution enables analysis of the distribution of various elements in samples under low acceleration voltage (typically unde...

We have evaluated nine different methods for estimating the fractal dimension of intensity images based on their accuracy, spread and robustness to noise. For this purpose we have generated some 6000 digital images with varying size and known fractal properties. To observe the influence of noise we have distorted these images with Poisson noise, Gaussian noise of different strength and point sp...

This research studies the impact of information technology enabled coordination on product modularization in the automotive industry. A structural equation model is tested based on 177 responses to questionnaires from 177 Korean first tier automotive suppliers. The results provide support for the hypothesis that high quality of exchanged information enables better supply chain coordination, whi...

A PDAE model of a multicomponent gas pipeline has been formulated and solved using the ode15s solver of Matlab. The model with boundary conditions allows for reactions and di usion. Also, general cubic equations of state for pressure and enthalpy are described. To simplify the implementation at this stage, a non-reactive, non-di usional model with fixed feed composition is considered, and multi...

We present results from high resolution (R≃ 28000) spectra of six highredshift QSOs taken at the ESO NTT telescope that allow the detailed study of the Lyman-α population in the redshift interval z = 2.8− 4.1. The typical Doppler parameters found for the Lyman-α lines lie in the interval b = 20÷30 km s, corresponding to temperatures T > 24000 K, with a fraction of the order 15% in the range 10 ...