Physical Sciences and Mathematics Commons^™

Numerical Groundwater Flow Modeling In The Wakal River Basin, India, Himadri Biswas

FIU Electronic Theses and Dissertations

Increasing dependence on groundwater in the Wakal River basin, India, jeopardizes water supply sustainability. A numerical groundwater model was developed to better understand the aquifer system and to evaluate its potential in terms of quantity and replenishment. Potential artificial recharge areas were delineated using landscape and hydrogeologic parameters, Geographic Information System (GIS), and remote sensing.

Groundwater models are powerful tools for recharge estimation when transmissivity is known. Proper recharge must be applied to reproduce field-measured heads. The model showed that groundwater levels could decline significantly if there are two drought years in every four years that result in reduced recharge, …

Quantifying The Effects Of Temperature And Concentration On Variable-Density Flow In Numerical Modeling Of Groundwater Systems : Implications For Predictive Uncertainty And Data Collection, Alyssa Marie Dausman

FIU Electronic Theses and Dissertations

Groundwater systems of different densities are often mathematically modeled to understand and predict environmental behavior such as seawater intrusion or submarine groundwater discharge. Additional data collection may be justified if it will cost-effectively aid in reducing the uncertainty of a model's prediction. The collection of salinity, as well as, temperature data could aid in reducing predictive uncertainty in a variable-density model. However, before numerical models can be created, rigorous testing of the modeling code needs to be completed. This research documents the benchmark testing of a new modeling code, SEAWAT Version 4. The benchmark problems include various combinations of density-dependent …

Small Sample Confidence Intervals For The Mean Of A Positively Skewed Distribution, Cherylyn Almonte

FIU Electronic Theses and Dissertations

This thesis proposes some confidence intervals for the mean of a positively skewed distribution. The following confidence intervals are considered: Student-t, Johnson-t, median-t, mad-t, bootstrap-t, BCA, T₁ , T₃ and six new confidence intervals, the median bootstrap-t, mad bootstrap-t, median T₁, mad T₁ , median T₃ and the mad T₃. A simulation study has been conducted and average widths, coefficient of variation of widths, and coverage probabilities were recorded and compared across confidence intervals. To compare confidence intervals, the width and coverage probabilities were compared so that smaller widths indicated a better …

Investigation Of Particle Identification Methods For The Analysis Of The Photoproduction Of Neutral Kaons On A Liquid Deuterium Target, Brian Beckford

FIU Electronic Theses and Dissertations

The Photoproduction of neutral kaons off a deuteron target has been investigated at the Tohoku University Laboratory of Nuclear Science. The PID methods investigated incorporated a combination of momentum, velocity (β=v/c), and energy deposition per unit length (dE/dx) measurements. The analysis demonstrates that energy deposition and time of flight are exceedingly useful. A higher signal to background ratio was achieved for hard cuts in combination. A probabilistic likelihood estimation approach (LE) as a method for PID was also explored. The probability of a particle being correctly identified by this LE method and the preliminary results denote the need …

Kaon Photoproduction Of The Proton: Contribution Of Higher Angular Momentum And Energy Resonances To The Cross-Section And Polarization Asymmetries Through An Effective Lagrangian Model, Alejandro M. De La Puente

FIU Electronic Theses and Dissertations

The differential cross-section and polarization observables in the process γ + p --> K⁺+ Λ are studied within an isobaric approach that includes resonances with total angular momentum J ≤ 5/2 over a center of mass energy range from W = 1.6 GeV to W=2.6 GeV. The model is used to fit recent experimental data as a function of the coupling products at the photon and strong vertices for the well established low energy resonances, as well as the total decay width for the high energy less well-established resonances.

The model employed in this study is based on …

Growth Of Uniform Cobalt Nano Magnetic Dots On Titanum Dioxide Surface, En Cai

FIU Electronic Theses and Dissertations

This research investigated the growth of cobalt magnetic nanodots on the rutile TiO₂ (110) surface. Well ordered TiO₂ (110) surface was prepared in the Ultra High Vacuum (UHV) via Ar+ sputtering and annealing. Co was deposited in-situ by Molecular Beam Epitaxy (MBE). Characterization of the growth was performed in-situ by a Variable Temperature Scanning Tunneling Microscope (VT-STM). The TiO₂ (110) surface was proven to promote the Volmer-Weber growth of Co nanodots. The cobalt atoms formed small clusters at the stage of initial growth. As the coverage increased, the size and density of clusters increased. It was discovered …