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21,962 Matching Results

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Narratives on College Access and Academic Undermatch: Understanding Latinx Students and Their Families (open access)

Narratives on College Access and Academic Undermatch: Understanding Latinx Students and Their Families

When students are academically qualified to attend a four-year college or university but instead enroll at a community college, they are considered academically undermatched. Research suggests that Latinx students are more likely to academically undermatch than their peers yet they remain the least likely to complete an upward transfer to a university and earn a baccalaureate degree. The purpose of this study was to explore the enrollment decisions of, and familial influences on, Latinx students who were admitted to a university but who initially enrolled at a community college. Using community cultural wealth and funds of knowledge as theoretical frameworks, I examined the narratives of 13 Latinx students and the parents of five of those students. Nine student participants were female and four were male, ranging from 19 to 31 years old. Parent participants were four females and two males, ranging from 43 to 52 years old. Findings from this study are divided into two parts. Student findings revealed navigating the pathway to college was fraught with limited information, even though students acknowledged they had access to resources and their high school counselors and teachers helped in the college search process. However, students still did not feel that crucial information …
Date: August 2017
Creator: Olivarez, Catherine Prieto
System: The UNT Digital Library
The Impact of Computational Methods on Transition Metal-containing Species (open access)

The Impact of Computational Methods on Transition Metal-containing Species

Quantum chemistry methodologies can be used to address a wide variety of chemical problems. Key to the success of quantum chemistry methodologies, however, is the selection of suitable methodologies for specific problems of interest, which often requires significant assessment. To gauge a number of methodologies, the utility of density functionals (BLYP, B97D, TPSS, M06L, PBE0, B3LYP, M06, and TPSSh) in predicting reaction energetics was examined for model studies of C-O bond activation of methoxyethane and methanol. These species provide excellent representative examples of lignin degradation via C-O bond cleavage. PBE0, which performed better than other considered DFT functionals, was used to investigate late 3d (Fe, Co, and Ni), 4d (Ru, Rh, and Pd), and 5d (Re, Os, and Ir) transition metal atom mediated Cβ -O bond activation of the β–O–4 linkage of lignin. Additionally, the impact of the choice of DFT functionals, basis sets, implicit solvation models, and layered quantum chemical methods (i.e., ONIOM, Our Own N-layered Integrated molecular Orbital and molecular Mechanics) was investigated for the prediction of pKa for a set of Ni-group metal hydrides (M = Ni, Pd, and Pt) in acetonitrile. These investigations have provided insight about the utility of a number of theoretical methods in …
Date: December 2015
Creator: Wang, Jiaqi (Physical chemistry researcher)
System: The UNT Digital Library