Digital Commons Network^™

Fully Coupled Fluid And Electrodynamic Modeling Of Plasmas: A Two-Fluid Isomorphism And A Strong Conservative Flux-Coupled Finite Volume Framework, Richard Joel Thompson

Doctoral Dissertations

Ideal and resistive magnetohydrodynamics (MHD) have long served as the incumbent framework for modeling plasmas of engineering interest. However, new applications, such as hypersonic flight and propulsion, plasma propulsion, plasma instability in engineering devices, charge separation effects and electromagnetic wave interaction effects may demand a higher-fidelity physical model. For these cases, the two-fluid plasma model or its limiting case of a single bulk fluid, which results in a single-fluid coupled system of the Navier-Stokes and Maxwell equations, is necessary and permits a deeper physical study than the MHD framework. At present, major challenges are imposed on solving these physical models …

Implications For Ability Grouping In Mathematics For Fifth Grade Students, Anne M. Stinnett

Masters Theses

This study examines the effects of ability grouping on fifth grade students at 47 elementary schools in a large urban school district. Using disaggregated standardized test data that statistically measures achievement growth, this study analyzes gains among students assigned to prior achievement quintiles as compared to three grouping strategies: homogeneous, heterogeneous with special classes for advanced and special education, and heterogeneous ability groups.

The findings suggest that the grouping strategies used in these schools are effective for the students at these schools. Most significant is that, on average, low achieving schools are grouping students in ways that are exhibiting positive …

The Impact Of Analyzing Correct Versus Incorrect Student Work Samples On Students’ Learning Mathematics, Lauren Jeneva Moseley

Doctoral Dissertations

The purposes of this study are to determine if learning differs when calculus learners analyze correct or incorrect work samples and to investigate students’ perceptions of the effect of analyzing work samples on their learning of mathematics. Calculus students were randomly assigned to two groups: one group analyzing correct work samples and one group analyzing incorrect work samples. Data from enrollees in 10 sections of Basic Calculus at a large university was analyzed using ANCOVA, independent-samples t-test, and inductive analysis (Hatch, 2002). Results suggest that when students analyze incorrect work samples of moderate difficulty, they are less likely to …