Digital Commons Network^™

Planar Linear Ion Traps With Microscale Radii For Portable Mass Spectrometry, Trevor Keith Decker

Theses and Dissertations

Radio frequency (RF) ion traps based on the quadrupole device developed by Paul and Steinwedel utilize a dynamic electric field to spatially confine the trajectory of charged particles and may be employed as mass spectrometers by selectively ejecting trapped molecules based on the mass to charge ratio. Because of the inherent sensitivity and specificity of this process, ion trap mass spectrometers have become a popular scientific instrument. In the past two decades there has been a push to develop portable ion trap mass spectrometers for in situ mass analysis by geometrically scaling traps to smaller sizes. This decreases the power …

5d Grain Boundary Characterization From Ebsd Microscopy, Akash Savio Amalaraj

Theses and Dissertations

Knowledge of the full 5-degree Grain Boundary Character Distribution (GBCD) is vital to understanding properties, such as gas diffusivity, that are dominated by grain boundary character. Surface characterization techniques, such as Electron Backscattered diffraction (EBSD), can provide only 4 of the 5 GB characteristics (the rotation between the neighboring grains, and the trace of the GB on the surface). The inclination of the GB in the direction normal to the surface is not known. A previous study indicated that the GB inclination could be recovered by correlating the Electron Backscattered patterns (EBSPs) of sample points near the GB with EBSPs …

Evaluation Of Comparative Damaging Effects Of Multiple Truck Axles For Flexible Pavements, Stefan Romanoschi, Athanassios Papagiannakis

Publications

This study aims at evaluating the effect of overlapping flexible pavement strain responses from truck axles that are not part of multiple axle configurations (i.e., tandem, triple and quad). For this purpose, a newly constructed pavement was instrumented with strain gauges installed at the bottom of the asphalt concrete base layer on US-287 south of Mansfield, TX. This pavement structure is typically used for medium- to high-volume roads in the South-Central region of the United States. The strain gauges were used to measure longitudinal and transverse strains under several passes of a test vehicle. This was a class 6 truck …

Recruiting, Retaining, And Promoting For Careers At Transportation Agencies, Christofer Harper, Susan Bogus, Raghava Kommalapati, Doeun Choe

Publications

State transportation agencies currently face complex challenges in recruiting and retaining the workforce necessary to function effectively. The situation exacerbates due to the number of employees from different generations that have to coexist with varying values, expectations, and principles. These agencies are primarily comprised of two generational groups: the baby-boomers, who are approaching retirement and occupy many managerial positions; and the millennials, who are demonstrating their interest in technology and demanding dynamism in their careers. This multiplicity of interest represents a challenge for human resources (HR) in addressing workforce issues and providing the necessary means to recruit and retain qualified …

Camper Self-Concept Promotes Environmental Awareness: A Relationship Mediated By Social Inclusion, Luc Cousineau, Steven Mock, Troy Glover

Journal of Youth Development

Summer camps in Canada provide services to hundreds of thousands of youth each year, giving opportunities for growth and development. However, summer camps in Canada remain understudied. Using one phase of data from the Canadian Summer Camps Research Project (CSCRP), analysis was conducted on the effect of camper self-concept on their environmental awareness, mediated by perceived level of social inclusion. A relationship between camper self-concept and environmental awareness existed, and that relationship was enhanced when campers were socially included. These findings show preliminary connections between self-concept and environmental awareness in summer camps, and open opportunities for further research into personal …

Bilateral Mastectomy, Choroidal Mass: A Curve Ball., Phillip Gordon, Carol L. Shields

Wills Eye Hospital Papers

No abstract provided.

A Past Never Past: An Analysis Of Slavery And Reparation At The University Of Mississippi, Allen Coon

Honors Theses

The University of Mississippi was built using slaves, but the enslaved and their descendants were willfully denied admission to the university until forced desegregation in 1962. This interdisciplinary study employs a qualitative content analysis of antebellum university board of trustees and faculty minutes to investigate the benefits that slavery conferred to the university and the harms that slavery inflicted upon the campus enslaved. Analysis finds that slavery was a standard operation, that extrajudicial violence against slaves was a campus tradition, and that white supremacy was an institutional ideology at the University of Mississippi. This thesis integrates African American reparations literature …

Austerity As Enclosure: How Austerity In Ireland After The Global Financial Crisis Acts As A Method Of Inclusion And Exclusion, Taylor Soto

College of Liberal Arts & Social Sciences Theses and Dissertations

This thesis argues that the austerity policies in Ireland after the 2007-2008 Global Financial Crisis acted as a form of second enclosure and increased economic inequality. This thesis uses a Marxian critique of neoliberal market society to analyze the policies enacted after the 2010 Irish Bailout. I situated the concept of enclosure within liberal hegemony arguing that enclosure must be conceptualized as a method of inclusion and exclusion. In addition, I connect Ireland’s history of enclosure with the power relation between land ownership and capital accumulation. I contextualize Ireland’s austerity policies within the neoliberal project and Ireland’s membership in the …

Identifying Trippers And Non-Trippers Based On Knee Kinematics During Obstacle-Free Walking, Lauren C. Benson, Stephen C. Cobb, Allison S. Hyngstrom, Kevin G. Keenan, Jake Luo, Kristian M. O'Connor

Physical Therapy Faculty Research and Publications

Trips are a major cause of falls. Sagittal-plane kinematics affect clearance between the foot and obstacles, however, it is unclear which kinematic measures during obstacle-free walking are associated with avoiding a trip when encountering an obstacle. The purpose of this study was to determine kinematic factors during obstacle-free walking that are related to obstacle avoidance ability. It was expected that successful obstacle avoidance would be associated with greater peak flexion/dorsiflexion and range of motion (ROM), and differences in timing of peak flexion/dorsiflexion during swing of obstacle-free walking for the hip, knee and ankle. Three-dimensional kinematics were recorded as 35 participants …

Removal Of Carbamazepine From Drinking Water, Adam Johnson, Thomas Krumpolc, Jordan Gadberry, Juan Rodriguez, Paolo Marrero-Rivera, Zachary Wiese

Chemical Engineering Undergraduate Honors Theses

Due to the increasing prevalence of prescription medication over the past few

decades, pharmaceuticals have accumulated in various water sources. This has become a

public health concern because many pharmaceuticals have limited research on the effects

of chronic low-level exposure. According to the World’s Health Organization (WHO),

traces of pharmaceuticals products have been reported in different water sources such as

surface waters, wastewater, groundwater, and drinking water.[1] One pharmaceutical of

interest that has been detected in water sources is carbamazepine. Carbamazepine is a

common pharmaceutical prescribed for the treatment of seizure disorders, neuropathic

pain, and various psychological disorders. It’s mechanism …

Removal Of Carbamazepine From Drinking Water, Juan Rodriguez, Tom Krumpolc, Adam Johnson, Paola Marrero-Rivera, Alex Gadberry, Zach Wiese

Chemical Engineering Undergraduate Honors Theses

Due to the increasing prevalence of prescription medication over the past few decades, pharmaceuticals have accumulated in various water sources. This has become a public health concern because many pharmaceuticals have limited research on the effects of chronic low-levelexposure. According to the World’s Health Organization (WHO), traces of pharmaceuticalsproducts have been reported in different water sources such as surface waters, wastewater, groundwater, and drinking water.[1] One pharmaceutical of interest that has been detected in water sources is carbamazepine. Carbamazepine (CBZ) is a common pharmaceutical prescribedfor the treatment of seizure disorders, neuropathic pain, and various psychological disorders. It’s mechanism of action …

Sulfate Removal From Mine Impacted Waters, Benjamin Drewry, Jean Morales, Tyler Shock, Derek Richard, Luis Sagarnaga, Benjamin Yeldell

Chemical Engineering Undergraduate Honors Theses

Woo Pig Sulfate (WPS) has developed two methods for reducing levels of calcium sulfate in mine impacted waters, a “hot process” and a two-stage nanofiltration process. Both processes were designed to treat gypsum saturated water that is currently being pumped via interceptor wells to prevent the spread of a sulfate plume into a nearby community. Each solution was designed for Freeport McMoran’s Sierrita mine in Green Valley, Arizona, which was visited in order to gain insight about the problem. Below 250 ppm on the treated stream, nanofiltration and the hot process achieve overall recoveries of 84 and 99%, respectively. The …

Evaluation Of A Centrifuge Consolidation Technique To Determine The Effects Of Temperature And Time On Kaolinite Properties, Esteban Miranda Pinzon

Civil Engineering Undergraduate Honors Theses

Abstract

The effects of time and temperature on the moisture content and unit weight profiles, as developed during a centrifuge consolidation process, were observed during the research program that is described herein. Specifically, a Beckman-Coulter Model J6-MI centrifuge with a six-place JS-4.2A swinging bucket rotor was utilized to consolidate kaolinite slurry samples. The consolidation procedure utilized specially designed slurry consolidometers, made from acrylic tubes with inside diameters of 2.63 inches (6.67 cm) and heights of 5.13 inches (13.04 cm). The tested kaolinite slurry samples were created by mixing 400 grams of dry kaolinite clay powder with 200 grams of de-aired …

Service Learning Through Extracurricular Activities: Development And Implementation Of A Transportation Engineering Learning Module, Karla Diaz Corro

Civil Engineering Undergraduate Honors Theses

This project developed an easy to implement, low-cost learning module. The module has students compare and contrast the challenges of gathering comprehensive and quality transportation data through advanced technologies and traditional approaches while introducing traffic engineering topics like traffic signal timing. The modules target middle through high school students and first and second year undergraduate engineering students. The learning modules introduce transportation engineering using an engaging open-source computer simulation game adapted by students at the University of Arkansas, as part of a capstone project. The activities in the learning modules require off-the shelf, low-cost computer hardware, making it easy for …

The Role Of Type 2 Diabetes And Metformin Use In Cognitive Decline, Kelley R. Chilson

Theses and Dissertations

Primary objectives of the present study include exploring the role of both A1C values and the anti-diabetic medication, metformin, on cognitive decline through measured by a brief neuropsychological exam (BNE) and the Montreal Cognitive Assessment (MoCA). Method: Eleven years of archival cognitive testing and medical information from a total of 479 East Central Florida Memory Disorder Clinic patients (52.8 % female, 88.5% Caucasian, Mage = 78.79 years) was utilized for the present study. Participants were placed into two groups: Type 2 diabetes (n = 239) and a control group (n = 240). Cognitive testing data were collected via MoCA screening …

The Role Of Athletic Scholarship On Suboptimal Performance In Baseline Concussion Testing, Lauren E. Goworowski

Theses and Dissertations

Objective: To date, there is a very limited amount of research regarding the topic of sandbagging (i.e., intentional poor performance) during concussion baseline testing in a collegiate athlete population. It is known that student-athletes may underreport their concussive symptoms so they can return to play more quickly, and may purposefully lower their baseline results to appear less impaired following a head injury so as to avoid exclusion from play (Echemendia & Cantu, 2003; Reilly 2011). At this point in time, it is difficult to make statements regarding sandbagging because the incidence of this behavior is unknown. Accordingly, this study had …

The Role Of Bip Co-Chaperone Sil1 In Marinesco-Sjögren Syndrome Pathogenesis, Viraj Paresh Ichhaporia

Theses and Dissertations (ETD)

Marinesco-Sjögren syndrome (MSS) is a rare, autosomal recessive, multisystem disorder, which is characterized by cerebellar ataxia, early-onset bilateral cataracts, and progressive myopathy amongst other symptoms. MSS has been attributed to mutations in the SIL1 gene, which encodes a nucleotide exchange factor for the endoplasmicreticulum- resident Hsp70 chaperone, BiP. To date, there are 46 MSS-associated mutations that have been reported in SIL1, which occur throughout this gene and are predicted to result in a loss of SIL1’s function. The large majority of these mutations cause deletions of large fractions of the SIL1 protein. Nine MSS-associated mutations are particularly interesting because they …

Targeting The Colchicine Binding Site On Tubulin To Overcome Multidrug Resistance And Anticancer Efficacy Of Selective Survivin Inhibitors, Kinsle E. Arnst

Theses and Dissertations (ETD)

Tubulin inhibitors are widely used as chemotherapeutic agents, and their successis attributed to their ability to target microtubule dynamics and disrupt critical cellular functions including cell signaling, motility, intracellular trafficking, and mitosis. Interference with microtubule dynamics consequently disrupts mitotic progression and ultimately leads to apoptosis, validating microtubule dynamics as an excellent target for anticancer agents. While this class of drug has proven to be effective against many cancer types, the clinical efficacy of current tubulin inhibitors is often limited by the development of multidrug resistance. The most common form of resistance to these agents arises from the overexpression of drug …

Genetic Exploration Of Hereditary Immune Diseases, Cheng Tian

Theses and Dissertations (ETD)

An autoimmune disease is a condition arising from an abnormal immune response to a normal body part. There are at least 80 types of autoimmune diseases, rheumatoid arthritis and systemic sclerosis are two of them. My study focuses on these two diseases. Our hypothesis is that mutated genes lead to autoimmune diseases that cause the immune system to attack the human body. The mutated genes cause the gene expression levels to change which fail to properly regulate the body's functions, resulting in immune system diseases. I used existing mouse models to improve the understanding of these two diseases.

The first …

Three Dimensional Nonlinear Simulation Of Quench Phenomenon In Superconducting Tapes Using Mesh-Free Monte-Carlo Method, Reza Bahadori

Theses and Dissertations

Performing quench propagation simulations of full size superconducting coils is a challenging problem due to complex coil structures and internal arrangements of superconducting wires. In addition, superconducting wires and cables themselves constitute complex 3D arrangements comprised of superconductor, matrix, stabilizer, insulation and other materials. Modelling quenches in complete coils is therefore a complex multi-scale and multi-physics problem that is difficult to solve with conventional techniques like finite element or finite difference methods. Monte-Carlo methods have been successfully used to simulate various multi-scale and multi-physics problems, but to our knowledge have not been applied to quench propagation simulations. In the first …

Vision-Based Navigation For Electromagnetic Formation Flight, Nasir Ghazi Hariri

Theses and Dissertations

The concept of using Satellite Formation Flight (SFF) reveals various benefits for a space mission. However, relying on a consumable actuation system to maintain a desired relative position and orientation between flying satellites has hindered its practicality and feasibility for long duration missions. By adapting the SFF concept such that electromagnetic actuation mechanism is employed, the concept of Electromagnetic Formation Flight (EMFF) offers a great potential to validate such a technology. EMFF provides interacting forces and torques between flying satellites to maintain their relative position within a formation using its electromagnetic actuation capabilities. This dissertation demonstrates the possibilities of utilizing …

Marching Into The Future: The Relationship Between Instrumental Music Class Participation And Advanced Placement English Language And Composition Test Results, Robert Alston Pettigrew

Doctoral Dissertations and Projects

Over the decades, there have been countless claims that participation in a music class will influence the cognitive abilities of students. Yet many districts elect to eliminate these programs in times of budgetary crisis. During a period when our national education system is focused on test scores, educational reformists should focus on the implementation of courses that yield academic success. This study was designed to determine if there is a significant relationship between instrumental music class participation and Advanced Placement English Language and Composition exam scores. Data for the group comparison consisted of 529 samples from a large county school …

Persistence And Superintendents: A Phenomenological Study, Katherine Hamilton Howard

Doctoral Dissertations and Projects

The purpose of this transcendental phenomenological research study was to describe the lived experiences of public school superintendents with the phenomenon of persistence. Self-Determination Theory was used to describe the experiences of superintendents who have held the superintendency in the same school district for at least 5 consecutive years (Deci & Ryan, 2000; Ryan & Deci, 2002). The central research question guiding the study is: What are the lived experiences of superintendents who persist in the public school superintendency? Subquestions addressed various aspects of Self-Determination Theory and persistence, including sources of motivation and goal attainment (Deci & Ryan, 2000; Ryan …

Using Tablet Technology To Teach Secondary Content Vocabulary: A Collective Case Study, Annie R. Raney

Doctoral Dissertations and Projects

The purpose of this collective case study was to provide an understanding of the instructional methods of teachers who use tablet technology in middle school classrooms to teach complex content vocabulary. Dewey’s theory of constructivism guided this study, as it explains that students learn by building upon what they know. Middle school students add new terms to their existing vocabulary banks so that they can learn the related concepts in their content-area classes. The study took place in a southern state with technology standards that require students to use technology for reading and learning purposes. There is extensive research about …

School Administrators' Leadership Styles, Gender, And Perceived Self-Efficacy In Suburban Virginia: A Multiple Regression, Nary Esther Kitson

Doctoral Dissertations and Projects

Educational leadership is one of the most important indicators in the success of a school. Research indicates leadership has various constructs which affect its effectiveness. The most successful and effective leaders have high self-efficacy. Leaders with high self-efficacy are affected by various constructs. Gaps in the literature on leadership effectiveness include the study of gender constructs and the effect of perceived self-efficacy and the effects of leadership styles (e.g., transformational, transactional, and laissez-faire). This study used a multiple regression analysis to determine if there is a significant predictive relationship between perceived self-efficacy and the linear combination of gender and leadership …

An Outcrop Based Study Of The Weches Formation In Sabine County, Texas: Investigating Its Unconventional Resource Potential Through The Study Of Stratigraphy, Sedimentology, Petrology, And Geochemistry, Talban Kantala

Electronic Theses and Dissertations

Fresh Weches Formation (Middle Eocene) exposures found in aggregate quarries in Sabine County, Texas, were sampled, measured, and logged with gamma-ray spectrometry (GRS). Sedimentology and petrology characteristics of Weches samples were analyzed through thin section, scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction, and GRS Th/K ratios analyses. The source rock quality of the Weches was evaluated with geochemical techniques involving total organic carbon (TOC), Rock-Eval pyrolysis, and GRS Th/U ratios.

The Weches, in the study area, is 27.4 meters thick, and delineated into three major stratigraphic facies: an upper marginal marine prodeltaic facies (Therrill Member) comprised of silty claystones and …

The Challenges Faced By The Freedmen’S Bureau Agents Of Deep East Texas, Jacy D. King

Electronic Theses and Dissertations

The years following the Civil War proved to be tumultuous for the nation and caused great social and economic upheaval in the South. Congress established the Bureau of Refugees, Freedmen, and Abandoned Lands in 1865 to provide a smoother transition in former Confederate states and to guard the liberties of the former bondsmen. The agents of the Freedmen’s Bureau in Deep East Texas faced the same challenges and hardships as their counterparts in other areas of the state and throughout the South. Numerous historians have written on Reconstruction and the Freedmen’s Bureau in Texas, but in a broader sense.

This …

Updating The Procedural Law Of Judicial Review Of Administrative Action

UBC Law Review

No abstract provided.

Hdl-C As Most Predictive Variable Of Visceral Adipose Tissue In Young Military Personnel Of The National Guard, Sofia Rae Sanchez Porush

Master's Theses

Twenty-two young men and women of the 49^thMilitary Police Brigade of the California National Guard were participants of our nutrition education and health assessment program. The California National Guard has expressed concern of unsatisfactory physical and nutritional status of their personnel related to a nutrition knowledge deficit as evidenced by preliminary data of insufficient dietary intake and poor nutrition knowledge assessment scores. Our program was designed to implement a nutrition intervention including education and evaluate its effectiveness in reducing Metabolic Syndrome (MetS) risk factors, improving body composition, and providing educational lessons intended to alter lifestyle. Baseline data was …

The Role Of Mental Translation In Learning And Using A Second/Foreign Language By Female Adult Learners, Julia Falla-Wood

Journal of Global Education and Research

The purpose of this study is to ponder some theoretical considerations concerning a predominant phenomenon of mental translation (MT) observed by second language teachers and learners in learning and using a second/foreign language. The sample available to the researcher consists of seven female adult learners speaking different languages. The choice of the sample is not related to the age level of the learners, but their English level (5-6) according to the Canadian Language Benchmarks. The research instruments used in this study are two compositions written on two occasions, during 2013-2015 and in 2016, a personal questionnaire, a strategy questionnaire, and …