Digital Commons Network^™

“I’Ve Been Given The Wrong Mother:” Reconsidering Absent Mothers In Postmodern British Literature, Amanda G. Sawyers

Electronic Theses and Dissertations

Nineteenth-century British authors, in particular, Charles Dickens, Charlotte Bronte, and Jane Austen, often turned to orphaned children as a means to drive the plot of their novels. While struggles such as displacement were often accurately depicted, the abovementioned authors and their contemporaries often glossed over or completely disregarded the trauma and psychological implications felt by these orphans. As psychology gained prominence as a discipline through the works of Sigmund Freud and others, modern British literature saw a shift in its consideration of orphans and, additionally, emotionally absent mothers. This thesis will examine three modern British novels; Ian McEwan’s Atonement, …

Sip-428, A Sir2 Deacetylase Enzyme And Its Role In Biotic Stress Signaling Pathway, Bal Krishna Chand Thakuri

Electronic Theses and Dissertations

SABP2 (Salicylic Acid Binding Protein 2) plays a vital role in the salicylic acid signaling pathway of plants both regarding basal resistance and systemic acquired resistance against pathogen infection. SIP-428 (SABP2 Interacting Protein-428) is a Silent information regulator 2 (SIR2) like deacetylase enzyme that physically interacts with SABP2 in a yeast two-hybrid interaction and confirmed independently by a GST pull-down assay. We demonstrated that SIP- 428 is an NAD+ dependent SIR2 deacetylase enzyme. Transgenic tobacco plants silenced in SIP- 428 expression via RNAi showed enhanced basal resistance to microbial pathogens. Moreover, these SIP-428-silenced lines also exhibited a robust induction of …

Resilience Of Nigerian Widows In The Face Of Harmful Widowhood Practices In Southwest Nigeria: An Interdisciplinary Analysis, Esosa Mohammed

Electronic Theses and Dissertations

Widows in Nigeria endure adverse and traumatic practices that affect their health, well-being, and rights as women. After decades of struggle and resistance against persistent widowhood practices, this study sought to portray in Nigerian widows, hidden strengths, resilience, and agency rather than their vulnerability and powerlessness. Analysis of secondary scholarship, interviews, and survey questionnaires reveal that some Nigerian widows are able to cope even as they navigate through the challenges and trauma of demeaning and stressful practices. The results also demonstrate that the ability to cope and thrive under stress and adversity links not only to an individual’s personal growth …

Relative Permittivity As A Function Of Co-Solvent And Impedance Spectroscopy For Quantifying Anions In Solution, Yahya Sami Alseiha

Electronic Theses and Dissertations

This work measured relative permittivity from 15.0 to 55.0 °C of aqueous solutions containing acetone or tetrahydrofuran using a BI 870 dielectric meter. A cubic polynomial fit resulted in coefficients for calculating permittivity as a function of temperature and mole fraction. Literature values for other co-solvent system resulted in similar polynomial coefficients. Using BI 870, permittivity measurements of ionic solutions were not possible because of high conductivity. A simple method using impedance spectroscopy measured these solutions. Impedance decreases with increasing temperature and decreases with increasing ionic strength. Due to the temperature dependence of impedance, all measurements were at 25.0 °C. …

Improving Sinkhole Mapping Using Lidar Data And Locating Sinkhole Hotspots In Johnson City, Tn, Kingsley Fasesin

Electronic Theses and Dissertations

Predicting infrastructure damage and economic impact of sinkholes requires high accuracy mapping distribution and development. The study mapped sinkholes and sinkhole hotpsots in Johnson City, TN using LiDAR-derived Digital Elevation Model (DEM) and a database of known sinkholes which were matched to LiDAR-derived depressions. For all matched depressions (n = 404), three metrics were calculated: circularity index, ratio of length to width of the Minimum Bounding Rectangle (MBR) and percent coverage of the MBR by the depression, and 3,634 new sinkholes were identified. Newly developed hotspots were identified in north Johnson City and other areas in the south near the …

Dreadd Targeting Projections From The Nucleus Accumbens To The Ventral Pallidum With Nicotine Self-Administration, Amanda Smith

Electronic Theses and Dissertations

Projections from the Nucleus Accumbens (NAc) to the Ventral Pallidum (VP) play a critical role in motivation and reward. Rewards and reward-associated cues are thought to alter this pathway by suppressing GABA release to the VP, however, the role of the NAc to VP pathway has never been investigated with regard to nicotine self-administration. We hypothesized that increasing GABAergic signaling from the NAc to the VP would decrease the reinforcing effects of nicotine. To increase GABA release, CRE dependent DREADD was expressed in the NAc of male rats. Administration of low dose clozapine activated the DREADD receptor and showed a …

Characterization Of Acyltransferases And Wrinkled Orthologs Involved In Tag Biosynthesis In Avocado, Md Mahbubur Rahman

Electronic Theses and Dissertations

Triacylglycerols (TAG) or storage oils in plants are utilized by humans for nutrition, production of biomaterials and fuels. Since nonseed tissues comprise the bulk biomass, it is pertinent to understand how to improve their TAG content. Typically, the final step in TAG biosynthesis is catalyzed by diacylglycerol (DAG) acyltransferases (DGAT) and/or phospholipid: diacylglycerol acyltransferases (PDAT), which also determine the content and composition of TAG. Besides enzymatic regulation of TAG synthesis, transcription factors such as WRINKLED1 (WRI1) play a critical role during fatty acid synthesis. In this study, mesocarp of Persea americana, with > 60% TAG by dry weight and oleic …

The Role Of Non-Neuronal Acetylcholine In Urogenital Chlamydial Infection, Jessica R. Lockhart

Electronic Theses and Dissertations

Chlamydia trachomatiscauses a bacterial sexually transmitted infection, Chlamydia, that is often chronic and casues reproductive complications in women. We hypothesized that Chlamydia infection increases local acetylcholine (ACh) production, which regulates the host’s inflammatory response to the infection. Female mice infected with C. muridarumwere sacrificed at days 3, 9, 15, and 21 post-infection, genital tract tissues harvested, and immunohistochemistry performed to enumerate ACh-producing cells. Infection increased the number of ACh-producing cells in cervical tissue at days 3,15, and 21 post-infection (pi), uterine tissue at day 3 and 9 pi, and ovarian tissue day 3, 15, and 21 pi. These …

Officer Perceptions On Armed Campuses, Paul Perry

Electronic Theses and Dissertations

This research was intended to investigate the perceptions of firearm policies and the views held by campus security personnel regarding student or teacher carry on campus. The purpose of the interviews was to investigate campus security officer’s perceptions and how they differ based upon individual belief systems. The goal, therefore, was to understand how their perspectives on campus carry could impact interactions with students and faculty. Exploring a representative sample of current firearm policies, both on and off campus, established a framework that exposed the opinions of campus security personnel and gave some insight into the potential impact that might …

The Effects Of Sexual Victimization On College Women, Bailie Light

Electronic Theses and Dissertations

This thesis analyzed the effects of sexual victimization among college women. Previous research has found that victimization has several negative effects. This thesis was designed to add to this literature by addressing how sexual victimization effects both behavior and academic performance. Results indicated that there was a significant relationship between sexual victimization and behavior changes, the type of victimization experienced had a different impact on the victim based on the type of victimization they experienced, and that academic performance was significantly affected by sexual victimization.

Use Of A Daily Behavior Report Card And Response Dependent Fading To Increase And Maintain Academic Engagement In An Elementary Student With Developmental Delay, Ziyad Alrumayh

Electronic Theses and Dissertations

The initial and maintenance effects of a Daily Behavior Report Card (DBRC) intervention and fading procedure on Academic Engaged Time (AET) of a 6-year-old boy with Developmental Delay and Attention Deficits were evaluated with a reversal design. Following an initial baseline, the DBRC was implemented and then completely removed followed by reapplication of the DBRC. Subsequently, the report card was gradually reduced in the frequency of its use from very daily to every other day. Increased AET reliably varied with the application and then removal of the DBRC. Whereas complete removal of the DBRC resulted in substantial decreases in AET, …

Temperature And Polyunsaturated Fatty Acid’S Effect On Daphnia Magna Reproduction, Mark Albright

Electronic Theses and Dissertations

Organisms adapt to their environments by adjusting their biochemistry and physiology; such adaptation is limited by resource availability and physiological constraints. The freshwater crustacean Daphnia magna inhabits a wide range of environments and must survive and reproduce within a range of temperatures. One limit to low-temperature adaptation is thought to be the availability of unsaturated fatty acids necessary to maintain proper fluidity of cellular membranes. D. magna maintained at 10 ºC on a diet poor in unsaturated fatty acids have been observed to produce clutches that fail to develop. However, this has not been observed on a diet rich in …

The Ecology Of Fecal Indicators, Dennis A. Gilfillan

Electronic Theses and Dissertations

Animal and human wastes introduce pathogens into rivers and streams, creating human health and economic burdens. While direct monitoring for pathogens is possible, it is impractical due to the sporadic distribution of pathogens, cost to identify, and health risks to laboratory workers. To overcome these issues, fecal indicator organisms are used to estimate the presence of pathogens. Although fecal indicators generally protect public health, they fall short in their utility because of difficulties in public health risk characterization, inconsistent correlations with pathogens, weak source identification, and their potential to persist in environments with no point sources of fecal pollution. This …

Extraction And Purification Of Biologically Active Metabolites From Rhodococcus Sp. Mtm3w5.2, Mohrah Alenazi

Electronic Theses and Dissertations

Rhodococcushas been recognized as a potential antibiotic producer. Recently, a strain of Rhodococcussp. MTM3W5.2 was isolated from a soil sample collected in Morristown, Tennessee and was found to produce an inhibitory compound which is active against other related species. The purpose of this research is to extract, purify and analyze the active metabolite. The compound was extracted from RM broth cultures and purified by preliminary fractionation of crude extract through a Sephadex LH-20 column. Further purification was completed using semi-preparative reversed phase column chromatography. Final purification was obtained using multiple rounds of an analytical C18 HPLC column. Based …

Italian Domination On Ladders And Related Products, Bradley Gardner

Electronic Theses and Dissertations

An Italian dominating function on a graph $G = (V,E)$ is a function such that $f : V \to \{0,1,2\}$, and for each vertex $v \in V$ for which $f(v) = 0$, we have $\sum_{u\in N(v)}f(u) \geq 2$. The weight of an Italian dominating function is $f(V) = \sum_{v\in V(G)}f(v)$. The minimum weight of all such functions on a graph $G$ is called the Italian domination number of $G$. In this thesis, we will consider Italian domination in various types of products of a graph $G$ with the complete graph $K_2$. We will find the value of the Italian domination …

Performance Assessment Of The Extended Gower Coefficient On Mixed Data With Varying Types Of Functional Data., Obed Koomson

Electronic Theses and Dissertations

Clustering is a widely used technique in data mining applications to source, manage, analyze and extract vital information from large amounts of data. Most clustering procedures are limited in their performance when it comes to data with mixed attributes. In recent times, mixed data have evolved to include directional and functional data. In this study, we will give an introduction to clustering with an eye towards the application of the extended Gower coefficient by Hendrickson (2014). We will conduct a simulation study to assess the performance of this coefficient on mixed data whose functional component has strictly-decreasing signal curves and …

Public Perceptions On Domestic Sex Trafficking And Domestic Sex Trafficking Victims: A Quantitative Analysis, Faith Browder

Electronic Theses and Dissertations

Sex trafficking is a grossly misconstrued and increasing issue within the United States. The purpose of this study was to extend current knowledge regarding the public’s education on domestic sex trafficking and perceptions of domestic sex trafficking victims. The public’s awareness of domestic sex trafficking and perceptions of domestic sex trafficking victims were examined through the utilization of a 31 closed-ended question survey. The survey included questions about domestic sex trafficking and prostitution myths, domestic sex trafficking victim characteristics, domestic sex trafficking legislation, law enforcement’s involvement in domestic sex trafficking cases, and demographics. The sample consisted of 195 Criminal Justice …

Teacher Perceptions Of Inclusion And Students With Autism, Nancy Keener

Electronic Theses and Dissertations

Inclusion is considered the least restrictive environment for most students with disabilities. The purpose of this study was to examine teachers’ and administrators’ perceptions of inclusion in general education classrooms for students with autism. This included an examination of how schools determined placement for students with autism, the academic and social influences of placement in the general classroom, perceptions of teachers and administrators about inclusion for students with autism, teaching strategies that worked for students with autism in the general classroom, and the influence other students in the classroom have on students with autism. Participants in the study were from …

Groundwater Hydrogeolgy And Hydrochemistry Of Karst Springs In The Eastern Peninsula Of Fort Hood Military Installation, William Scribner Welles

Electronic Theses and Dissertations

The eastern peninsula of Fort Hood Military Installation is underlain by a complex karst spring network. These springs are a primary water source in a protected habitat for endangered songbirds, which has only recently begun to be fully investigated. These Fredericksburg Group springs express both epigenetic and hypogenetic karst signatures. The study area is part of a paleo reef trend, a hydraulically disconnected segment of the northern section of the Edwards Aquifer. This study utilized standard ion index values, repeated measures, and principal component analyses on the chemical profiles of six perennial springs to classify spring water sources and their …

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 …

Depositional Environment And Facies Analyses Of The Owl Mountain Province, Fort Hood Military Installation, Bell And Coryell Counties, Texas, Jacob Meinerts

Electronic Theses and Dissertations

The Owl Mountain Province is a plateaued, karst landscape located in the eastern section of the Fort Hood Military Installation and is characterized by Lower Cretaceous Fredericksburg Group carbonates. The topography is capped by thick sequences of the Edwards limestone; steep scarps and incised valleys along the edges of the plateaus host inter-fingering outcrops of the Edwards and Comanche Peak limestones, and the lower valleys are covered by alluvial sediments and intermittent outcrops of the Walnut Clay. These formations were deposited to the north and west of the main Edwards trend, and are thought to be part of a series …

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 …

Making Summer Feature: A History Of Sfa Student Productions, Dudley Kyle May

Electronic Theses and Dissertations

This thesis will discuss the documentary film Summer Feature: A History of SFA Student Productions, which I filmed, directed and produced. It will discuss how this documentary came into existence and the process I went through to film and edit the interviews featured in the final film. It will also detail the process of discovering the theme of the film, from the initial concept through post-production.

Brain Activity In College Students With The Broad Autism Phenotype, Amy Gaylord Beaver

Electronic Theses and Dissertations

Abstract

This study examined brain activity in college students with the broad autism phenotype (BAP) while viewing facial expressions. Quantitative Electroencephalogram assessments were conducted in the temporal lobe area in the brains of 38 college students declared as Science, Technology, Engineering, and Math (STEM) majors. Participants were divided into BAP+ versus BAP- groups based on their scores on the Broad Autism Phenotype Questionnaire (BAPQ). Findings revealed that individuals categorized as BAP+ demonstrated a higher alpha relative power score and a higher T4 relative to T3 coherence Z score when looking at expressive faces than when looking at neutral faces when …

Bryophyte Assemblages On American Hornbeam (Carpinus Caroliniana) And The Surrounding Arboreal Communities Within The Forest Of East Texas, Cassey Edwards

Electronic Theses and Dissertations

The bryophytes, the non-vascular plants, include the mosses (Bryophyta with approximately 13,000 species), the liverworts (Marchantiophyta with approximately 5,000 species), and the hornworts (Anthocerotophyta with approximately 150 species). Initial observations indicated that the midstory tree Carpinus caroliniana Walter (American hornbeam) has a bryophyte composition with an unusually high diversity of leafy liverworts. Voucher samples were taken from the four intercardinal directions (Northeast, Northwest, Southwest, and Southeast) from six Carpinus trees and their nearest neighbor that was neither Pinus nor another Carpinus at each of six sites across East Texas. Percent coverage, species richness, Shannon’s diversity and Pielou’s evenness were computed. …

Topological Properties Of A 3-Rung Möbius Ladder, Rebecca Woods

Electronic Theses and Dissertations

In this work, we discuss the properties of the 3-rung Möbius ladder on the torus. We also prove ℤ₂ is an orientation preserving topological symmetry group of the 3-rung Möbius ladder with sides and rungs distinct, embedded in the torus.

Effectiveness Of Prescribed Fire On Meeting Fuel Load And Wildlife Habitat Management Objectives In East Texas National Forests, Trey Wall

Electronic Theses and Dissertations

Using standardized methodology outlined by the United States Forest Service and the National Forests and Grasslands in Texas’ Fire Monitoring Program for data collection, the efficacy of current Forest Service prescribed burn regimes were analyzed for 24 study sites in East Texas National Forests. Study sites were located within Sam Houston, Davy Crockett, and Angelina/Sabine National Forests. Efficacy was determined by comparing defined management objectives established by the Forest Service to the data collected at the study sites. The results conclude that most objectives, as outlined by the Forest Service, are not being met with the current practices. Re-visitation of …

Physical And Chemical Controls On Suffosion Development In Gypsic Soil, Culberson County, Texas, Jonah Morris

Electronic Theses and Dissertations

In the Gypsum Plain, suffosion processes have encouraged road failure through dissolution and transport of gypsic soils; however, no prior research has been conducted within the Delaware Basin in regard to these processes. These phenomena were evaluated in both field and laboratory settings in order to assess the parameters of suffosion development associated with Ranch to Market (RM) 652 in Culberson County, Texas, where infrastructure extends across Castile and Rustler strata. Field studies simulated surficial ponding in various gypsic soils and correlated suffosion potential with soil composition and thickness. Soluble fractions of gypsic soils were delineated through geochemical analyses, further …

Demographics, Experiences, And Management Preferences Of Backcountry Campers In Yellowstone National Park, Ryan P. Grisham

Electronic Theses and Dissertations

A questionnaire was distributed to backcountry campers in Yellowstone National Park for the summer of 2016. Upon registering for a backcountry camping permit, park rangers asked if campers would like to participate in the survey, which included questions regarding demographics and opinions on visitor experiences and management policies. Participants provided their names and email address and were sent a link to the questionnaire about two weeks after their trip. The survey was a partial replication of a study by Tim Oosterhous conducted in 1999 and results for both years were analyzed and compared to identify any changes in backcountry use …

Exploding Aliens And Other Offspring, Jonathan Patrick Grant

Electronic Theses and Dissertations

The goal of Exploding Aliens and Other Offspring is to capture my specific surrealist world point of view provided by the closed-knit crazy community I grew up in alongside my love for cartoonish melodrama. The collection progresses in order of images and the evolution of such themes as the venture from childhood to adulthood, societal obligations, religion, parenting, death and the hereafter.