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Protective Action Decision-Making during the 2019 Dallas Tornado
The 2019 Dallas Tornado struck a densely populated area, was the costliest tornado in Texas history, and had minimal warning lead time, yet there were no serious injuries or fatalities. To understand why, this study examines individuals' decision-making processes during this tornado using the protective action decision model (PADM). Specifically, it investigates the factors affecting threat belief and evaluation, the facilitators and impediments to protective action, and the effects on future risk perception and hazard adjustment measures. Semi-structured telephone interviews were conducted with 23 survivors to explore their experiences and decision-making processes during this tornado. Interviews were analyzed through inductive coding and a constant comparative approach. Key findings of this study suggest that clear and direct warning messages, coupled with rapid, heuristic-driven reactions, can overcome the impediment of a short-fuse warning time and motivate those at risk to take protective action. Additionally, this study identifies condominium owners as a housing population with unique needs and impediments in the tornado recovery process. Furthermore, results illustrate how the hazard scenario and contemporary technological culture nuance protective action decision-making and future hazard adjustment measures.
Date:
August 2021
Creator:
Huether, Graham R.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Resilience in the Face of Stress: Gender Differences in the Relationship between Resilience and Stress among Lesbian and Gay Older Adults in the American South
The minority stress model provides context to understand the mechanisms by which prejudicial experiences contribute to the disproportionate prevalence of adverse physical and mental health outcomes among LGBT people. The transactional model of stress and coping explains the appraisal processes through which people identify stigma-related stimuli as threatening and how they assess available coping resources to counteract these threats. The Connor-Davidson Resilience Scale (CD-RISC) and the Perceived Stress Scale (PSS) were used in this study to measure resilience and stress in a sample of 99 lesbian and gay older adults. Women reported statistically significantly higher levels of resilience and lower levels of perceived stress compared to older gay men. An analysis of covariance (ANCOVA) revealed statistically significant main effects for gender (Cohen's d = .51; ηp2 = .056; F(1,98) = 5.488, p = .021) while controlling for perceived stress (Cohen's d = 1.62; ηp2 = .375; F(1,98) = 55.840, p < .001). An interaction effect between gender and perceived stress was also statistically significant (Cohen's d = .72; ηp2 = .115; F(1,98) = 12.40, p < .001) indicating that the negative relationship between stress and resilience is stronger for older gay men. Clinical implications and relevance to future research are …
Date:
August 2021
Creator:
Poché, Barton J
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Sociality in Harris's Hawks Revisited: Patterns of Reproductive Output and Delayed Dispersal
In the lower Rio Grande Valley of south Texas, more than half the nesting groups of Harris's hawks (Parabuteo unicinctus) include at least one auxiliary group member in addition to a breeding pair. To provide further insight into cooperatively breeding raptors, I evaluated sociality in Harris's hawks through the dual benefits framework. I explored the formation, structure, and stability of cooperative group formation across a spatially variable study area, which includes high levels of urbanization and development as well as remote, undisturbed native habitats with low anthropogenic impact. I used color banding, regular censuses of active territories, and a microsatellite relatedness analysis to examine patterns of sociality, including delayed dispersal, the effect of auxiliary group members on reproductive output, parentage of broods, and the relatedness of auxiliaries compared to the nestlings in their territories. I confirmed cooperative polygamy with genetic techniques for the first time in Harris's hawks and found 58% of juvenile hawks delayed dispersal for at least 6 mo. Using the dual benefits framework, I found social associations that formed through delayed dispersal followed predictions for resource-defense benefits, but sociality among mature non-related hawks more closely followed predictions associated with collective action benefits, specifically reproductive output was significantly …
Date:
August 2021
Creator:
Gibbons, Andrea L
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Socialization of the Strong Black Woman Schema
Black mothers socialize their daughters to embody the strong Black woman (SBW) schema to help them navigate gendered racist oppression. While research indicates that ascribing to the SBW schema offers Black women psychosocial benefits (e.g., increased self-esteem), identifying with the SBW schema has been linked to several negative psychological outcomes (e.g., anxiety, depression, and stress). Considering the evidenced negative implications associated with identifying with the SBW schema on Black women's mental health, the current study had three aims: (1) investigate the socialization messages Black women received about strong Black womanhood, (2) explore the extent to which they identified with these messages, and (3) assess the implications of this socialization on Black women's functioning. To address these aims researchers conducted semi-structured interviews with 11 Black college women (Mage = 20.09; SD = 1.04). For this manuscript, we extracted data pertaining to aim one and analyzed this data using a consensual qualitative research (CQR) data approach. Findings revealed messages Black women were given about strong Black womanhood (i.e., know your worth, depend on yourself, overcome societal barriers, little to no messages about strong Black womanhood, and additional responses) and illuminated behaviors mothers modeled that exemplified strength (i.e., self-sufficient, preserving, caretaking, and additional …
Date:
August 2021
Creator:
Gaskin-Cole, Gabriella
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Studies on the Fibrinolytic Pathway in Zebrafish
Fibrinolysis pathway is an important mechanism for dissolution of fibrin clot by the action of plasmin which is formed from plasminogen, a zymogen via the action of plasminogen activators, i.e. tissue plasminogen activator and urinary plasminogen activator. The regulation of fibrinolysis system in vivo is maintained by plasminogen activators and natural inhibitors i.e. α2-antiplasmin, α2-macroglobulin, Thrombin-activatable fibrinolysis inhibitor (TAFI) and plasminogen activator inhibitor 1 and 2 (PAI-1and PAI-2). There are several fibrinolytic assays developed for human plasma but there are no reports describing fibrinolytic assay using zebrafish plasma. In this study, a fibrinolytic assay via using small amount of zebrafish plasma was developed. This assay was performed under different conditions; one by the addition of exogenous tissue plasminogen activator alone to the pooled zebrafish plasma along with calcium chloride and thromboplastin, second Dade ACTIN was used instead of tissue plasminogen activator and third Dade ACTIN along with thromboplastin was used. Epsilon amino caproic acid (EACA), a synthetic antifibrinolytic agent was used at different concentrations to inhibit fibrinolysis successfully. Similar experiments were performed on human plasma as well to check the applicability of the assay to humans and positive results were obtained. Furthermore, knockdown of tissue plasminogen activator and plasminogen genes …
Date:
August 2021
Creator:
Gill, Jaspreet Kaur
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Suzanne Collins' Hunger Games Trilogy: How Society of Spectacle Bred the Mockingjay
Using spectacle to alienate people from each other and life, President Snow's Panem from Collins' Hunger Games trilogy is Guy Debord's Society of Spectacle. As Debord predicts, the spectacle of the Annual Hunger Games causes a degradation of life for citizens in the Districts and the Capitol, leading to a society where nobody truly lives and citizens accept the narrative that President Snow and his regime promote about the Games. Using Luis Althusser to understand how President Snow links his power to that of the Games, we understand how the dictator brainwashed his citizens into compliance through his narrative, and also, how this narrative is constantly delivered through the various ISAs and SAs in Panem to degrade life into false unity and false consciousness, socially coercing citizens to fall in line with the narrative around spectacle. Katniss Everdeen is unique as she is too authentic to use her celebrity status in promotion of the Games; instead, she accidentally performs Debord's true critiques, sparking a rebellion through love. Katniss' acts of love translate into true critiques of the spectacle that is Panem and the Games, and because Snow has spent decades brainwashing his populace into a blind acceptance of celebrity and …
Date:
August 2021
Creator:
Trotter, Olivia Royce
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Traditional and Deep Learning Approaches to Color Image Compression and Pattern Recognition Problems
This thesis includes three separate research projects focusing on computer vision principles and deep learning pattern recognition problems. Chapter 3 entails color quantization applications using traditional Kmeans clustering techniques and random selection of color techniques within the red, green, blue (RGB) color space to maintain a high-quality image while significantly reducing image file size. Chapter 4 consists of a handwriting character recognition algorithm using backpropagation to classify 70,000 handwritten values from US Census Bureau employees and high school students. Chapter 5 proposes a novel classification technique for 109,446 unique heartbeat samples to identify areas of interest and assist medical professionals in diagnosing heart problems.
Date:
August 2021
Creator:
Jaques, Lorenzo E
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Use of Instructive Feedback to Promote Emergent Verbal Responses: A Replication
Previous research has incorporated instructive feedback (IF) within mastered listener-by-name trials with two children diagnosed with autism spectrum disorder (ASD). Participants in a previous study acquired the secondary targets and also demonstrated emergent responding (i.e., listener-by-feature, tact-by-feature, intraverbal, and reverse intraverbal). The current study replicated a previous study on IF with two children with ASD. Therapists conducted a series of three sessions of mastered listener-by-name trials (e.g., "Show me otter," and the participant selecting the picture of the otter) and provided IF statements for features of the target stimuli (e.g., "It lives in rivers."). We measured participants' echoic responding and required attending to the target stimulus during IF trials, and we evaluated acquisition of secondary targets and emergent responses using a concurrent multiple probe design across sets. We observed increased correct responding for secondary targets and emergent responses for the first set of stimuli with both participants. However, one participant did not engage in emergent responses for the two remaining sets. Results suggest that related verbal operant response relations of secondary targets may result after IF, but the extent of emergence may be idiosyncratic.
Date:
August 2021
Creator:
Laddaga Gavidia, Valeria
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
What Does It Mean to Go Super Saiyan: Gender Identity and Fandom in the Toonami Release of Dragon Ball Z (1998-2003)
The intention of this thesis is to analyze the representations of masculinity in the anime series Dragon Ball Z as it aired on Cartoon Network's programming block Toonami, specifically the nature in which they were framed and how oppositional interpretations in the fandom became prevalent as a result. The series emphasizes the evolution of its central characters Goku, Vegeta, and Gohan into performing a sensitive masculinity, but there are a prevalence of images in the series that discredit this. Similarly, the way the series was advertised on Toonami placed emphasis on images of superficial violence and reinforced the masculinity that the series was attempting to move beyond. Understanding the ways fans have interpreted Dragon Ball Z on Toonami helps reveal that there is much more to a media text's influence than its themes and representations of gender.
Date:
August 2021
Creator:
Liverett, Nicholas
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Where Have All the Cowboys Gone? Creating the Post 9/11 Westerner
The intention of this thesis is to analyze the figure of the post 9/11 Westerner as a modern character created from the preexisting archetype of the classic Westerner. 3:10 to Yuma (dir. James Mangold), The Assassination of Jesse James by the Coward Robert Ford (dir. Andrew Dominik), and There Will Be Blood (dir. Paul Thomas Anderson) were released in 2007 and featured post 9/11 Westerners dealing with issues of fatherhood, demonstrating the prevalence of this figure within the modern western genre. Fatherhood becomes the prism through which these characters are depicted, which becomes the main source of their anxiety. The events of 9/11 contributed to a fracture of the western myth established by the classic postwar western that results in the post 9/11 Westerner attempting to reclaim a similar mythic status. The post 9/11 Westerner becomes an inversion of the classic Westerner seen through his insecure masculinity and ultimate failure to live up to his own imagined ideals.
Date:
August 2021
Creator:
Possoit, Dylan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Wildfire Influence on Rainfall Chemistry and Deposition in Texas during the 2011-2014 Drought
From 2011 to 2014, one of the most severe and intense droughts in Texas recorded history led to widespread wildfires across the state, with unknown effects on atmospheric nutrient and pollutant deposition. The objectives of this research were to: (1) characterize the frequency, magnitude, and spatiotemporal distribution of Texas wildfires (2011-2014); (2) identify smoke occurrence and source regions at eight Texas National Atmospheric Deposition Program (NADP) National Trends Network (NTN) sites (2011); and (3) quantify the influence of wildfire on weekly rainwater chemistry and deposition in 2011 at three NADP sites (Sonora, LBJ Grasslands, Attwater Prairie NWR). Data on large wildfires, smoke occurrence, and rainfall chemistry and deposition were coupled with principal component and back-trajectory analysis to address these objectives. Between 2011-2014, 72% of all wildfires occurred in 2011, accounting for 90% of the total area burned. In total, there were 17 extreme wildfires (i.e., in the 95th percentile of hectares burned), of which 11 occurred in 2011. Wildfire activity was concentrated in West Texas ecoregions and consumed primarily shrub/scrub and grassland/herbaceous land cover. Although West Texas experienced the most wildfires, smoke at the NADP locations in 2011, the "high-fire year," was more frequent in East Texas due to regional …
Date:
August 2021
Creator:
Williamson, Thomas
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Fig 2
Installation view of one of the Fig sculptures on Acrylic Plastic, Latex Paint by artist Philip F. Samson as part of a 2022 MFA exhibition, entitled "Confluence" in the Environmental Education, Science and Technology Building Atrium on the main campus of the University of North Texas from April 4 to April 14, 2022.
Date:
November 2021
Creator:
Samson, Philip F.
Object Type:
Artwork
System:
The UNT Digital Library
3D Printing of Zinc Anode for Zinc Ion Batteries
Recently, 3D printing has received increasing attention for the fabrication and assembly of electrodes for batteries due to the freedom of creating structures in any shape or size, porosity, flexibility, stretchability, and chemistry. Particularly, zinc ion batteries (ZIBs) are favored due to high safety, cheap materials cost, and high volumetric capacity (5,849 mAh/cm3), however, rapid evaporation of Zn due to low melting temperature has limited its 3D printability via conventional laser-based additive manufacturing technique. Here, we develop a printable ink for the fabrication of flexible and 3D printed Zn anode with varied surface areas using the direct ink writing (DIW) method. Our 3D printed porous and high surface area Zn anode structures effectively suppressed the dendrite growth while providing high Zn ion diffusion towards the cathode to significantly enhance the performance of ZIB. By varying filament distancing and path, we 3D printed zinc anode structures with different active surface areas, surface area to volume ratio, porosity, flexible and multiple layer structures that can be incorporated on any device. Carbon in the composite improved conductivity, and mechanical stability of 3D printed zinc anode. Our 3D printed composite anodes allowed flexible designing of batteries surpassing conventional battery designs such as coin cells …
Date:
December 2021
Creator:
Amoko, Stephen Adot Oyo
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Additive Manufacturing of AZ31B Magnesium Alloy via Friction Stir Deposition
Additive friction stir deposition (AFSD) of AZ31B magnesium alloy was conducted to examine evolution of grain structure, phases, and crystallographic texture. AFSD was carried out using a hollow tool made from tool steel at a constant rotational velocity of 400 rpm on the AZ31B base plate. Bar stock of AZ31B was utilized as a feed material. The linear velocity of the tool was varied in the range of 4.2-6.3 mm/s. The feed rate of the material had to be maintained at a half value compared to the corresponding linear velocity for the successful deposition. The layer thickness and length of the deposits were kept constant at 1 mm and 50 mm respectively. The tool torque and actuator force values were recorded during the process and for calculation of the average input energy for each processing condition. Temperature during the AFSD experiments was monitored using a type k thermocouple located 4 mm beneath the deposition surface at the center of the deposition track. The average input energy values showed a decreasing trend with increasing tool linear velocity. The temperature values during deposition were ∼0.7 times the liquidus of the alloy. The deposited material then was examined by laser microscope and profilometer, …
Date:
December 2021
Creator:
Patil, Shreyash Manojkumar
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Aerodynamic Optimization of a 2D Airfoil for Rotary-Wing Aircraft at Mars Atmospheric Conditions
The interest toward Mars exploration has been considerably increasing due to also the successful deployment of the Perseverance rover and the continuous tests developed by SpaceX's launch vehicle, Starship. While the Mars 2020 mission is currently in progress, the first controlled flight on another planet have been proven in April 2021 with the vertical take-off and landing of the Ingenuity rotorcraft on Mars. In addition, the rotorcraft Dragonfly is expected to achieve the same endeavor in Titan, the largest moon of Saturn, by 2036. Continuous efforts have been oriented toward the development of new technologies and aircraft configurations to improve the performance of current proposed designs to achieve powered flight in different planetary bodies. This thesis work is a preliminary study to develop a comprehensive analysis over the generation of optimum airfoil geometries to achieve vertical flight in environments where low Reynolds numbers and Mach number equal to 0.2 and 0.5.
Date:
December 2021
Creator:
Saez, Aleandro G.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Air Corridors: Concept, Design, Simulation, and Rules of Engagement
Air corridors are an integral part of the advanced air mobility infrastructure. They are the virtual highways in the sky for transportation of people and cargo in the controlled airspace at an altitude of around 1000 ft. to 2000 ft. above the ground level. This paper presents fundamental insights into the design of air corridors with high operational efficiency as well as zero collisions. It begins with the definitions of air cube, skylane or track, intersection, vertiport, gate, and air corridor. Then, a multi-layered air corridor model is proposed. Traffic at intersections is analyzed in detail with examples of vehicles turning in different directions. The concept of capacity of an air corridor is introduced along with the nature of distribution of locations of vehicles in the air corridor and collision probability inside the corridor are discussed. Finally, the results of simulations of traffic flows are presented.
Date:
December 2021
Creator:
Muna, Sabrina Islam
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Analysis of the Integration of LEO Satellite Constellations into 5G Networks
Low Earth orbit (LEO) satellite systems have been proposed as a resource for combating the challenges in 5G network coverage and expanding connectivity to a global realm. This research focuses on the current architecture of LEO satellite constellations, with an emphasis on satellite coverage, visibility patterns and coordination schemes. Key-elements of integrating LEO satellites into the eMBB component of 5G are presented and a breakdown of potential link channel characteristics and physical layer performance metrics are described. The produced information allows for a justified analysis on the conceptualized integration.
Date:
December 2021
Creator:
Cruz Vazquez, Martin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Behavior Analytic Account of Humor Responses: Taking a Joke Way Too Seriously
Compared to other examples of human behavior, humor responses have received relatively little attention from the scientific community and by the behavior analytic community in particular. This study investigated what some of the controlling variables for humans to emit a humor response may be. Participants were randomly presented two types of word sequences/jokes: one with a matching punchline and one without a matching punchline. Participants rated whether the jokes were funny or not funny, and reaction time was measured for all stimuli presented. Generally, the results showed that reaction times to punchlines rated as not funny were shorter than punchlines that were rated funny. These differences in reaction time were interpreted with priming, intraverbal control, and multiple control as an experimental foundation. Limitations include the absence of physiological measures due to COVID-19 restrictions and the forced choice of two rating responses. The implications of this research reveal opportunities for future research of humor responses.
Date:
December 2021
Creator:
Amezquita IV, Edward Brandon
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Behind the Curtain of Public Space: Revealing the Narratives of Corporate Street Hawking in Globalizing Accra
All street hawkers are not the same in many Newly Industrialized Countries (NICs) of the global south as often portrayed by the media and documented in extant literature. This perception has created a gap in knowledge as researchers explore street hawking activities in NICs. In this study, I investigated a new informality trend of street hawking is coming into being within the capital city of Accra, Ghana. As governance is increasingly becoming entrepreneurial, informal activities are gradually becoming formal. Formal and registered businesses are increasingly capitalizing on hawking activities to occupy public spaces. The advent of the informality trend, I term corporate street hawking opens up new issues for the political economy, labor, and urban studies. By employing semi-structured interviews with 47 street hawkers in Accra, this paper sought to investigate three broadly interrelated questions. First, how do neoliberal policies impact the production of public space in Accra? Second, is corporate street hawking a form of creative destruction? Finally, how do corporate street hawkers practice agency within Accra?
Date:
December 2021
Creator:
Ansah, Hilary Ama
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Comparing a Hear-Say and See-Say Teaching Procedures during Verbal Behavior Instruction
Establishing effective language intervention for those who struggle to acquire it early on has received significant attention from researchers within the field of behavior analysis. The procedures of the present study were adapted from Spurgin' thesis research from 2021, in which a stimulus specific consequence was used during teaching after participants made correct responses. In this case, the stimulus specific consequence was a label for a picture that participants were required to point to during teaching trials. When participants pointed to the correct card, the researcher would label the card and deliver a small wooden block which the participants were told they were working for. In the hear-say procedures, participants were taught one set of cards and instructed to echo the researchers' labels. In the see-say participants were taught a second set of cards and instructed to "beat' the researcher to saying the word. After all cards were taught, were tested with a non-vocal receptive identification test. Immediately following this, participants were tested with a vocal expressive identification test. An extended teaching was included to determine the effects of additional practice within each condition. Results indicated that the participants were able to require some receptive and expressive language but targets …
Date:
December 2021
Creator:
Borquez, Nicholas Paul
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Contradictory Attitudes towards Partisan Issues: Abortion and Gun Control
In this study, I examine how self-reported religiosity predicts political opinion toward abortion and gun control. In particular, I examine how self-reported religiosity relates to individuals' inconsistent attitudes on these two issues where liberal attitudes are held toward one issue, but conservative attitudes are held toward the other. Most commonly, these inconsistent attitudes are found among individuals who hold pro-life (conservative) and pro-gun control (liberal) views. Using data from the 2018 General Social Survey, I find that religiosity significantly predicts these inconsistent attitudes regarding abortion and gun control. This suggests that religious ethics regarding life and death can offer a partial explanation for inconsistent attitudes toward partisan issues.
Date:
December 2021
Creator:
Pinney, Sarah
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Correspondence between Receptive and Expressive Task Performances: A Further Analysis of Necessary Conditions
This study was a replication and an extension of the 2021 research performed by Spurgin and Borquez on the correspondence between receptive and expressive behavior. Spurgin examined the role of the echoic in a hear-say procedure with adult learners, while Borquez examined the role of the echoic in both hear-say and see-say procedures. Both studies found that receptive and expressive correspondence did not occur consistently across participants. The present study asked if the fading steps used during training contributed to the results of the previous researchers. In the present study, the fading steps were changed to minimize the chance that the participant developed a position bias. The conditions were also counterbalanced to analyze the effects of hear-say vs. see-say, easy vs. difficult words, and the order in which the words were trained on the acquisition of receptive labels and the emergence of expressive labels. The study consisted of five phases: pre-training, hear-say teaching, see-say teaching, receptive testing, and expressive testing. Results indicated that although that acquisition of receptive labels improved, the change in fading steps did not make a significant difference in the correspondence of receptive and expressive language. Results showed similar correspondence in the hear-say and see-say procedures. Easy …
Date:
December 2021
Creator:
Nachawati, Noor
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Counting Plane Tropical Curves via Lattice Paths in Polygons
A projective plane tropical curve is a proper immersion of a graph into the real Cartesian plane subject to some conditions such as that the images of all the edges must be lines with rational slopes. Two important combinatorial invariants of a projective plane tropical curve are its degree, d, and genus g. First, we explore Gathmann and Markwig's approach to the study of the moduli spaces of such curves and explain their proof that the number of projective plane tropical curves, counting multiplicity, passing through n = 3d + g -1 points does not depend on the choice of points, provided they are in tropical general position. This number of curves is called a Gromov-Written invariant. Second, we discuss the proof of a theorem of Mikhalkin that allows one to compute the Gromov-Written invariant by a purely combinatorial process of counting certain lattice paths.
Date:
December 2021
Creator:
Zhang, Yingyu
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Credentialing in Higher Education: A User Experience Study of the University of North Texas' Student Learner Record
This was a mixed-method user-centered study regarding the University of North Texas's student-owned learner record and credentialing system. Through methods of quantitative and qualitative inquiry, student perceptions were unearthed and recommendations to improve the system were provided.
Date:
December 2021
Creator:
Stutts, Sarah
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library