UNT Theses and Dissertations - 21,382 Matching Results

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Processing-Structure-Property Relationships of Spark Plasma Sintered Boron Carbide and Titanium Diboride Ceramic Composites

Description: The aim of this study was to understand the processing – structure – property relationships in spark plasma sintered (SPS) boron carbide (B4C) and B4C-titanium diboride (TiB2) ceramic composites. SPS allowed for consolidation of both B4C and B4C-TiB2 composites without sintering additives, residual phases, e.g., graphite, and excessive grain growth due to long sintering times. A selection of composite compositions in 20% TiB2 feedstock powder increments from 0% to 100%, was sintered at 1900°C… more
Date: May 2018
Creator: Rubink, William S.
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Improvement of the Soil Moisture Diagnostic Equation for Estimating Root-Zone Soil Moisture

Description: Soil moisture information can be used accurately in determining the timing and amount of irrigation applied to plants. Pan and Pan et al. proposed a robust and simple daily diagnostic equation for estimating daily soil moisture. The diagnostic equation evaluates the relationship between the soil moisture loss function and the summation weighted average of precipitation. The loss function uses the sinusoidal wave function which employs day of the year (DOY) to evaluate the seasonal variation in … more
Date: May 2018
Creator: Omotere, Olumide Olubunmi
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Transitive and Intransitive Verbs in Ki Idioms

Description: The purpose of this thesis is to examine idiomatic structures with ki in the ki-wo [transitive verb] and ki-ga [intransitive verb] constructions. It is argued that for Japanese language learners, it is crucial to be able to understand and produce ki idioms, because they are frequently used in everyday speech. There are often misconceptions regarding ki in the West for those who are fans of Japanese culture due to the influence of martial arts and anime, which paint ki as a spiritual energy th… more
Date: May 2018
Creator: Hoye, Nathaniel
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Effect of the Resistance Exercise-Induced Hormonal Changes on Satellite Cell Myogenic State

Description: Skeletal muscle satellite cells are important for muscle repairing and muscle mass growth. For a successful muscle regenerative process, satellite cells have to sequentially undergoing different stages of myogenic process, i.e. proliferative state and differentiation state. To support this process, the presence of different circulating factors, such as immune cells, cytokines, and hormones, at the appropriate time course is critical. Among these factors, hormones, such as testosterone, cortisol… more
Date: May 2018
Creator: Luk, Hui Ying
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Isolation and Characterization of Phages Infecting Streptomyces azureus

Description: Isolating novel phages using Streptomyces azureus, which produces antibiotic thiostrepton, as a host, and characterizing the genomes may help us to find new tools that could be used to develop antibiotics in addition to contribute to the databases of phages and specifically, Streptomyces phages. Streptomyces phages Alsaber, Omar, Attoomi, Rowa, and ZamZam were isolated using during this study. They were isolated from enriched soil and sequenced by Illumina sequencing method. They were isolated … more
Date: May 2018
Creator: Sulaiman, Ahmad M.
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Connected and Benevolent: The Positive Impact of Social Connections in Reducing Economic Concerns for Volunteering

Description: This dissertation attempts to answer how social and economic mechanisms operate in individual, community and state levels to impact volunteering. Both social processes and economic factors significantly impact the amount of volunteering. However, researchers have a tendency to explain volunteering only by one of these factors. As both theories are equally important in explaining volunteerism, the development of a coherent theory is necessary to combine economic and social theories. This dissert… more
Date: May 2018
Creator: Baktir, Yusuf
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Factors that Drive New Technology Product and Service Use and Continuance

Description: Understanding information technology and its related products and services is increasingly important because the everyday use of technology continues to expand and broaden. Despite this need for greater understanding, the extant theories that explore the dominant factors that drive intention to use a new technology are limited. The Technology Acceptancy Model (TAM) is the most popular model in explaining traditional technology adoption. The limitations of the TAM in grasping the overall evaluat… more
Date: May 2018
Creator: Liu, Xiaotong
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Population Dynamics and Community Structure of Mosquitoes (Diptera: Culicidae) Recorded in Denton, Texas from 2005 to 2015

Description: A population survey was conducted on the mosquito species recorded in Denton, Texas for the years of 2005 to 2015. Data used in this project were obtained from an ongoing, long-term surveillance program led by the City of Denton and conducted through the University of North Texas. Research focused on the population dynamics and community structure of mosquitoes collected within urban areas of Denton, Texas in relation to certain environmental variables. A total of 80,837 female mosquitoes were … more
Date: May 2018
Creator: Hambrick, Bethany Lynn
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From Childhood Maltreatment to Depressive Symptoms in Adulthood: The Roles of Self-Compassion and Shame

Description: We hypothesized that the formation of malevolent introjects undermines the development of self-compassion, which in turn produces greater feelings of shame. We hypothesized that these feelings of shame account for concurrent depressive symptoms in adulthood. To test these hypotheses, we proposed a multiple mediator mediation model in which our independent variable was childhood maltreatment. We modeled child maltreatment as negatively predicting our first mediator, self-compassion, which in … more
Date: May 2018
Creator: Ross, Nicholas Dutra
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Association of Personality Facets with Unique Dimensions of PTSD

Description: The present study aims to examine which maladaptive and Big Five personality traits, as well as which lower order facets, are related to symptoms specific to PTSD (i.e., intrusions and avoidance). Unique effects were isolated by controlling for nonspecific general depression that occurs in the disorder but is not specific to it. 707 undergraduate students were administered a self-report online survey to assess their personality, trauma history, PTSD and mood symptoms. Additionally, data from 5… more
Date: May 2018
Creator: Shteynberg, Yuliya A
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Electrodeposition of Molybdenum-Based Coatings from Aqueous Alkaline Solutions for Enhanced Corrosion Resistance

Description: Zn-Mo coatings are very promising environment friendly anticorrosive coatings as replacement materials for cadmium and chromium (VI) based conversion layers. Electrodeposition has become a favorable technique in fabricating coatings due to its low cost, ease of use, and overall experimental control of coating quality. Very little research so far has been done for the electrodeposition of Zn-Mo coatings under alkaline conditions. In this work, Zn and Zn-Mo coatings were electrochemically deposit… more
Date: May 2018
Creator: Zhou, Ting
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Seeking Method in the Madness: Demystifying Students' Multimodal Digital Composing Processes

Description: The study of writing has moved through process and product movements. The rapid introduction of technology into classroom spaces has provided new platforms and opportunities for students to integrate multiple modes of communication into a single act of composing. While there is an acknowledgment that digital multimodal composition is a highly complex act and set of processes, much of the literature and investigation into this digital turn in composing has largely been product focused versus pro… more
Date: May 2021
Creator: Stamm, Brett M.
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High Strain Rate Deformation Behavior of Single-Phase and Multi-Phase High Entropy Alloys

Description: Fundamental understanding of high strain rate deformation behavior of materials is critical in designing new alloys for wide-ranging applications including military, automobile, spacecraft, and industrial applications. High entropy alloys, consisting of multiple elements in (near) equimolar proportions, represent a new paradigm in structural alloy design providing ample opportunity for achieving excellent performance in high strain rate applications by proper selection of constituent elements a… more
Date: May 2021
Creator: Muskeri, Saideep
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Ethnic-Racial Socialization, Ethnic-Racial Identity, and Psychosocial Functioning

Description: The current research recruited 200 college students from the University of North Texas to explore the direct and indirect effects of familial ethnic-racial socialization on selected psychosocial variables (i.e., general self-efficacy, life satisfaction, and psychological distress) via ethnic-racial identity variables: exploration, affirmation, and resolution. The results indicated that cultural socialization from family predicted life satisfaction via exploration and resolution, predicted gener… more
Date: May 2021
Creator: Hasan, Faraha
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Immigrant Children's Perspectives of Books that Share Stories of Early School Experiences

Description: Guided by the importance of children's voices and perspectives, this study aims at finding the immigrant children's perspectives of books that share stories of early school experiences of immigrant children. Before working with children, there was a careful selection process and analyzing of the three picture books chosen for the study using critical content analysis and childism lenses. The participants are three Arab immigrant children at the age of 6 who are bilingual and attended school in … more
Date: December 2020
Creator: Alharbi, Sara Abdullah
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Consequences of Coworker Bullying: A Bystander Perspective

Description: Previous research on workplace bullying primarily focuses on two main actors – the bully and the victim – while neglecting a third actor: the bystander of the bullying. The prevalence of workplace bullying is increasing across organizations, resulting in more employees becoming subjected to the effects of workplace bullying. Furthermore, witnessing coworker-on-coworker bullying is likely to influence the relationships that the bystander has with the two coworkers involved in the bullying epi… more
Date: May 2017
Creator: Medina, Michele N.
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A Study of Mobility Models based on Spatial Node Distribution and Area Coverage

Description: Mobile wireless sensor networks are not widely implemented in the real world, even after years of research carried out in this field. One reason is the lack of understanding of the impact that mobility has on network performance. The simulation and emulation of mobile wireless sensor networks is necessary before they are deployed for the real-world applications. This thesis presents a simulation-based study of different mobility models. The total area coverage that depends on the pattern of nod… more
Date: May 2017
Creator: Alla, Sindhu
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Catastrophe in Permanence: Benjamin's Natural History of Environmental Crisis

Description: Walter Benjamin warned in 1940 of a certain inconspicuous threat to political thinking, not least of all to materialism, that takes progress as an historical norm. Implicit in this conception is what he describes as an empty continuum of time along which the prevailing tradition chronicles its own mythic development and drains everyday life of genuine historical experience. The myth of progressive history advances insidiously today in consumeristic and technocratic attempts at reconciling cultu… more
Date: May 2017
Creator: Bower, Matthew S.
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Characteristics of Mothers among Counselor Education Faculty

Description: Pre-tenured faculty in higher education and as well as mothers have reportedly struggled with low wellness levels, high demands, little social support, and an imbalance of work and home life. Mothers in higher education and in counselor education have reported struggling with work-life balance, high scholarly productivity, and long hours as well as the emotional and physical energy demands of working with counselors-in-training. A search of the professional literature revealed a paucity of qu… more
Date: May 2017
Creator: Jimenez, Kyrstin A.
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When the Levee Breaks: An SEM Approach to Understanding the Narrative and the Anxiety-Buffer Disruption on PTSD Symptoms

Description: The purpose of the present study was to assess if combining the two frameworks would account for more variance in PTSS than could be accounted for using the frameworks separately. An online community sample from Amazon.com's Mechanical Turk (N = 437), who reported experiencing a prior traumatic event, completed measures that reflected the constructs of narrative centrality, negative affectivity, and death concerns, along with a measure of PTSS. PTSS was regressed on the latent variables of deat… more
Date: May 2017
Creator: Schuler, Eric Robert
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An Analysis of Litigation against Kansas Educators and School Districts under the Kansas Tort Claims Act

Description: This dissertation examines the significance of the Kansas Tort Claims Act of 1979 on state of Kansas court decisions in litigation against Kansas school districts and their employees. Through providing a historical perspective of the adoption and abolishment of the doctrine of sovereign immunity in the United States, which subsequently led to the enactment of the Federal Tort Claims Act, and ultimately led to the Kansas Tort Claims Act, the researcher analyzes pertinent case law and scholarly … more
Date: May 2017
Creator: Perry, Shaun P.
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University Faculty and Diverse Students' Self-Reported Attitudes toward Inclusive Teaching Strategies

Description: This dissertation examines a university faculty (n = 41) and diverse students (n = 93) including students with disability (n = 44), students without disability (n = 21), and international students (n = 28) regarding their attitudes toward and actions associated with inclusive instruction based on the universal design for learning (UDL) principles and practices. Two online surveys, the Inclusive Teaching Strategies Inventory (ITSI) and the Inclusive Teaching Strategies Inventory-Student (ITSI-S)… more
Date: May 2017
Creator: Alamri, Abdulrahman Saleh
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A Comparative Evaluation of Matrix Training Arrangements

Description: A common goal of instructional techniques is to teach skills effectively and efficiently. Matrix training techniques are both effective and efficient as they allow for the emergence of untrained responding to novel stimulus arrangements, a phenomenon known as recombinative generalization. However, it is unclear which type of matrix arrangement best promotes recombinative generalization. The current study compared two common matrix training approaches, an overlapping (OV) design and a non-overla… more
Date: May 2017
Creator: Cliett, Terra N.
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Rapid Metabolic Response of Plants Exposed to Light Stress

Description: Environmental stress conditions can drastically affect plant growth and productivity. In contrast to soil moisture or salinity that can gradually change over a period of days or weeks, changes in light intensity or temperature can occur very rapidly, sometimes over the course of minutes or seconds. So, in our study we have taken an metabolomics approach to identify the rapid response of plants to light stress. In the first part we have focused on the ultrafast (0-90 sec) metabolic response of l… more
Date: May 2018
Creator: Choudhury, Feroza Kaneez
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Partner: UNT Libraries
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