Resource Type
Partner
Collection
UNT Theses and Dissertations
5,547
Office of Scientific & Technical Information Technical Reports
442
UNT Graduate Student Works
214
UNT Undergraduate Student Works
6
Technical Report Archive and Image Library
4
TRAIL Microcard Collection
3
UNT Scholarly Works
2
Burushaski Language Resource
1
World War One Collection
1
Degree Department
Department of Psychology
426
College of Education
289
College of Music
284
Department of Biological Sciences
267
Department of Teacher Education and Administration
259
Department of English
216
Department of Chemistry
203
Department of History
191
...
154
Department of Behavior Analysis
137
229 More
Degree Discipline
Degree Level
Country
States
Decade
Year
Month
Language
6,215 Matching Results
Results open in a new window/tab.
prev
Results:
6,193 - 6,215 of
6,215
Socioeconomic Status and Prosperity Belief in Guatemala
A popular belief in the exploding Pentecostal movement in the global South is the idea that if an individual has enough faith, God will bless them with financial prosperity. Although historically Pentecostalism has been identified as a religion of the poor, this study examines recent arguments that the current Pentecostal movement in Guatemala is a religion of the socially mobile middle and elite classes. Data from the Pew Forum on Religious and Public Life’s 2006 survey Spirit and Power: Survey of Pentecostals in Guatemala is used to conduct a logistic regression, in order to measure the effects of socioeconomic status on adherence to prosperity belief. Results suggest that, contrary to the current literature on Guatemalan Pentecostalism, prosperity belief is not necessarily concentrated among the upwardly mobile middle and upper classes, but rather is widely diffused across social strata, and in particular, among those that have lower levels of education. These findings have implications for the study of Pentecostalism in Guatemala and in the global South in general.
Date:
May 2014
Creator:
Johnson, Lindsey A.
System:
The UNT Digital Library
Interfacial Characterization of Chemical Vapor Deposition (Cvd) Grown Graphene and Electrodeposited Bismuth on Ruthenium Surface
Graphene receives enormous attention owing to its distinctive physical and chemical prosperities. Growing and transferring graphene to different substrates have been investigated. The graphene growing on the copper substrate has an advantage of low solubility of carbon on the copper which allow us to grow mostly monolayer graphene. Graphene sheet of few centimeters can be transferred to 300nm silicon oxide and quartz crystal pre-deposited with metal like Cu and Ru. Characterization of the graphene has been done with Raman and contact angle measurement and recently quartz crystal microbalance (QCM) has been employed. The underpotential deposition (UPD) process of Bi on Ru metal surface is studied using electrochemical quartz crystal microbalance (EQCM) and XPS techniques. Both Bi UPD and Bi bulk deposition are clearly observed on Ru in 1mM Bi (NO3)3/0.5M H2SO4. Bi monolayer coverage calculated from mass (MLMass) and from charge (MLCharge) were compared with respect to the potential scanning rates, anions and ambient controls. EQCM results indicate that Bi UPD on Ru is mostly scan rate independent but exhibits interesting difference at the slower scan. Bi UPD monolayer coverage calculated from cathodic frequency change (ΔfCathodic) is significantly smaller than the monolayer coverage derived from integrated charge under the cathodic …
Date:
May 2014
Creator:
Abdelghani, Jafar
System:
The UNT Digital Library
Krzysztof Penderecki’s Divertimento/suite for Cello Solo (1994-2013): a Stylistic Analysis and Performance Guide
Penderecki made a tremendous variety of contributions to the cello repertoire. His profound respect for tradition and for his past is deeply appreciated by both performers and audiences. In each individual composition, he explored the cello’s sonorous possibilities and created a new technical and musical palette for the instrument. He worked with legendary, world-renowned cellists who not only gave the premieres of his works but also established deep friendships with him. The Divertimento/Suite for Cello Solo (1994-2013), a compilation of miniature movements, each with its sophisticated structure, demonstrates Penderecki’s three compositional style periods. Baroque and Romantic elements in each movement are achieved within their style characteristics. Penderecki’s Divertimento/Suite for Violoncello Solo is composed of eight contrasting movements that were written during a nineteen-year period. The work is characterized by a Neo-Romantic aesthetic and utilizes the cello’s dark lyrical tones with a variety of timbre and tonal contrasts. The purpose of the present study is to create a practical performance guide to this important musical work with a detailed stylistic, textural, and motivic analysis of all eight movements. Although there are many published documents and analyses of Penderecki’s orchestral, choral, chamber and other solo pieces, the Divertimento/Suite for Cello Solo has …
Date:
May 2014
Creator:
Sturman, Esra
System:
The UNT Digital Library
Importance and Spatial Distribution of Phytophthora Ramorum Host Species in a Coast Redwood Forest
Phytophthora ramorum, an exotic forest pathogen known as ‘sudden oak death’ (SOD), has received considerable attention in recent years because of its effects on vegetation structure, composition, and fire disturbance regimes in western U.S. coastal forests. This research examines differences in the importance (e.g., density, dominance, and frequency) and distribution of five host species of P. ramorum–– Umbellularia californica (California bay laurel), Quercus agrifolia (coast live oak), Pseudotsuga menziesii (Douglas fir), Sequoia sempervirens (Coast redwood), and Arbutus menziesii (Madrone)––in Soquel, California. A stratified random sampling design was used to select 66 plots surrounding a managed forest edge in Soquel Demonstration State Forest. Vegetation measurements were conducted in summer 2013. In each plot, all trees ≥3 cm diameter at breast height (DBH) were identified to species, counted, and DBH, height, and canopy position measured. Leaf area index (LAI) of bay laurel was measured to quantify the amount of leaves available for pathogen dispersal with a LiCOR 2200 Plant Canopy Analyzer. In addition, morning (9:00 am) and afternoon (1:00 pm) photosynthetically active radiation (PAR) were quantified using a quantum light sensor. This paper examines the influence of environmental variables, including distance to edge, aspect, slope, and light availability on host species spatial …
Date:
May 2014
Creator:
Gray, Alicia E.
System:
The UNT Digital Library
How Cooperative Systems Respond to External Forces
Cooperative interactions permeate through nature, bringing about emergent behavior and complexity. Using a simple cooperative model, I illustrate the mean field dynamics that occur at the critical point of a second order phase transition in the framework of Langevin equations. Through this formalism I discuss the response, both linear and nonlinear, to external forces. Emphasis is placed on how information is transferred from one individual to another in order to facilitate the collective response of the cooperative network to a localized perturbation. The results are relevant to a wide variety of systems, ranging from nematic liquid crystals, to flocks and swarms, social groups, and neural networks.
Date:
May 2014
Creator:
Svenkeson, Adam
System:
The UNT Digital Library
From Development of Semi-empirical Atomistic Potentials to Applications of Correlation Consistent Basis Sets
The development of the semi-empirical atomistic potential called the embedded atom method (EAM) has allowed for the efficient modeling of solid-state environments, at a lower computational cost than afforded by density functional theory (DFT). This offers the capability of EAM to model the energetics of solid-state phases of varying coordination, including defects, such as vacancies and self-interstitials. This dissertation highlights the development and application of two EAMs: a Ti potential constructed with the multi-state modified embedded atom method (MS-MEAM), and a Ni potential constructed with the fragment Hamiltonian (FH) method. Both potentials exhibit flexibility in the description of different solid-states phases and applications. This dissertation also outlines two applications of DFT. First, a study of structure and stability for solid-state forms of NixCy (in which x and y are integers) is investigated using plane-wave DFT. A ground state phase for Ni2C is elucidated and compared to known and hypothesized forms of NixCy. Also, a set of correlation consistent basis sets, previously constructed using the B3LYP and BLYP density functionals, are studied. They are compared to the well-known to the correlation consistent basis sets that were constructed with higher-level ab initio methodologies through computations of enthalpies of formation and combustion enthalpies. …
Date:
May 2014
Creator:
Gibson, Joshua S.
System:
The UNT Digital Library
Gualterio Armando's 34 Canciones Hispanoamericanas Para Canto Y Piano: a Comprehensive Edition and an Analytical Study of the Work’s Thematic Unity, Chromaticism, and Use of Musical Quotations
During the 1930s, German-born music critic and composer Gualterio Armando (1887-1973), formerly known as Walter Dahms, set to music thirty-four poems by some of the most important Hispano-American poets from the latter part of the nineteenth and first half of the twentieth century. In these songs, Armando tries to capture the spirit and idiosyncrasy of Hispano-American cultures while incorporating his own musical aesthetics. Armando’s 34 Canciones Hispanoamericanas para Canto y Piano (34 Hispano-American songs for voice and piano) display an original sound and style full of rhythms, shapes, colors, and textures found in the music of various Hispanic cultures. Nevertheless, the essence of these songs is deeply rooted in nineteenth-century German musical traditions. This eclecticism results in unique works that developed and evolved as reflections of their creator’s musical psyche. This dissertation presents an analytical study of selected songs from the 34 Canciones. The study focuses on three compositional aspects: unity within song cycles, chromaticism, and the use of pre-existing musical material. Since only one of the 34 Canciones has ever been published, this document also includes a complete edition of the thirty-four songs. Additionally, a significant part of the research incorporates a biographical sketch of the composer.
Date:
May 2014
Creator:
Pérez Torres, René
System:
The UNT Digital Library
Onboarding Learning Modalities and the Relationships with Onboarding Experience, Locus of Control, Self-Efficacy, and Employee Engagement
Online and hybrid onboarding, or new-hire training and assimilation, has grown increasingly common in corporate settings, especially since the COVID-19 pandemic. This study explores how perceived onboarding experience, work locus of control, occupational self-efficacy, and employee engagement differed between those who onboarded with in-person, hybrid, or online methods. This study also explores how work locus of control could moderate these relationships and examines the relationships between employee engagement and onboarding experience, locus of control, and self-efficacy. This study used quantitative research methods in the form of a self-administered online questionnaire aimed at corporate employees who had onboarded within the previous 18 months. One hundred fifty-three employees completed the survey. It was found that no significant difference in the variables existed between modalities, except for the task characteristic subscale of perceived onboarding experience in which scores were lower for those onboarded in-person. However, work locus of control was found to significantly moderate the relationships between onboarding modality and experience, locus of control, and self-efficacy. Additionally, employee engagement was increased with higher perceived onboarding experience, more internal loci of control, and higher self-efficacy. In addition to the research questions, demographic data were also explored. It was found that perceived onboarding experience was …
Date:
May 2023
Creator:
Rieder, Aubrey Taylor
System:
The UNT Digital Library
Fabrication and Testing of Polymeric Flexible Sheets with Asymmetric Distributed Magnetic Particles for Biomedical Actuated Devices
This thesis explores a method to fabricate magnetic membranes with asymmetric distribution of particles and their testing as actuators. Focus of this research is to fabricate thin polymeric sheets and thickness range of 120-125µm, with asymmetric distribution of magnetic nano particles, employing micromagnets during the fabrication. The micromagnets are used to localize the magnetic particles during the curing process at selected locations. The effect of the asymmetric distribution of magnetic particles in the membrane is used for the first time. Magnetite (Fe3O4) is used as the magnetic particles that is embedded into a polymeric membrane made of polydimethylsiloxane (PDMS); the membrane is then tested in terms of deflection observed by using a high-resolution camera. From the perspective of the biomedical application, PDMS is chosen for its excellent biocompatibility and mechanical properties, and Fe3O4 for its non-toxic nature. Since magnetic actuation does not require onboard batteries or other power systems, it is very convenient to use in embedded devices or where the access is made difficult. A comparative study of membranes with asymmetric and randomly distributed particles is carried out in this thesis. The asymmetric distribution of magnetic particles can benefit applications involving localized and targeted treatments and precision medicine.
Date:
May 2022
Creator:
Bakaraju, Megha Ramya
System:
The UNT Digital Library
Cold-Formed Steel Member Connections Using BAC Screw Fasteners
Access:
Use of this item is restricted to the UNT Community
In this project, the main research objective is intend to seek criteria for evaluating the capacity of BAC screw fasteners with mixed configuration of waterproof seal washer, sealer tape and different pre-drill holes to determine shear and tension strength values for the screws used in cold-formed steel connections. The thesis presents the design methods and test program conducted to investigate the behavior and strength of the screw connections in shear and tension test. Test results were compared with AISI design provisions to determine if new design equations will be developed for those screws used in BAC cooling tower applications. LRFD resistance factors and ASD safety factors were investigated to the proposed design equations.
Date:
May 2019
Creator:
Li, Xun
System:
The UNT Digital Library
CFD Study of Ship Hydrodynamics in Calm Water with Shear Current and in Designed Wave Trails
Although the capability of computational fluid dynamics (CFD) in modeling ship hydrodynamics is well explored in many studies, they still have two main limitations. First, those studies ignore the effect of non-uniform shear current which exists in realistic situation. Second, the focus of most studies was laid more on the seakeeping/maneuvering performance and less attention was paid to survivability of ships due to extreme ship response events in waves, which are considered rare events but influential. In this thesis, we explore the capability of CFD in those two areas. In the first part of the thesis, the hydrodynamic performance of KCS in the presence of a non-uniform shear current is investigated for the first time using high-fidelity CFD simulations. Various shear current conditions with different directions were considered and results were compared with the ones with no shear current. The second part of the thesis focuses on study of rare events of ship responses by development of extreme response conditioning techniques to design the wave trail. Two conditioned techniques based on Gaussian and non-Gaussian processes are considered.
Date:
May 2022
Creator:
Phan, Khang Minh
System:
The UNT Digital Library
Impact of Processing Parameters and Forces on Channels Created by Friction Stir Bobbin Tools
In this thesis, friction stir channeling (FSC) and its process parameters influence on geometry, surface quality and productivity are explored. The probe of the friction stir processing (FSP) tool used to perform these tests was a modified submerged bobbin tool made of MP 159 Co-Ni alloy. The body was made from H13 tool steel. To find the optimal channel conditions for a targeted range of process parameters, multiple 6061 aluminum samples were prepared with a U shape guide to test the effects of different spindle speeds and feed rates. Using a gantry-type computer numerical control (CNC) friction stir welding (FSW) machine, the aluminum coupons were subjected to calibration experiments, force control tests, and an increased production rate to test these effects. It was found through experimentation that the programmed feed rates, spindle speeds and forces produced by the machine had an impact on the channel geometry. It was determined from the force-controlled setup that 8.46 mm/s at 750 RPM was the best combination of results for the four conditions tested on a CNC friction stir processing-machine. It was then tested at 10.58 mm/s at 800 RPM, which had comparable results with the best combination of input parameters from the force-controlled …
Date:
May 2022
Creator:
Koonce, James G
System:
The UNT Digital Library
Topology and Lattice-Based Structural Design Optimization for Additively Manufactured Medical Implants
Topology-based optimization techniques and lattice structures are powerful ways to accomplish lightweight components with enhanced mechanical performance. Recent developments in additive manufacturing (AM) have led the way to extraordinary opportunities in realizing complex designs that are derived from topology and lattice-based structural optimization. The main aim of this work is to give a contribution, in the integration between structural optimization techniques and AM, by proposing a setup of a proper methodology for rapid development of optimized medical implants addressing oseeointegration and minimization of stress shielding related problems. The validity of the proposed methodology for a proof of concept was demonstrated in two real-world case studies: a tibia intramedullary implant and a shoulder hemi prosthetics for two bone cancer patients. The optimization was achieved using topology optimization and replacement of solid volumes by lattice structures. Samples of three lattice unit cell configurations were designed, fabricated, mechanically tested, and compared to select the most proper configuration for the shoulder hemi prosthesis. Weight reductions of 30% and 15% were achieved from the optimization of the initial design of the tibia intramedullary implant and the shoulder hemiprosthesis respectively compared to initial designs. Prototypes were fabricated using selective laser melting (SLM) and direct light processing …
Date:
May 2019
Creator:
Peto, Marinela
System:
The UNT Digital Library
Public Research Universities as Gendered Organizations: Institutional Rewards and the Faculty Salary Gap
Gendered organizational conditions create the context for persisting differences between men and women in the workplace. Within, higher education, this manifests as a salary gap between male and female faculty members. The academic capitalistic policy environment creates the conditions for increasing competition for external funding, especially in the areas of research and science and engineering. The change in the academic climate may sustain or intensify the gendering of universities as organizations. Universities with the highest level of research activity were chosen for this study and formed the 130 public institution sample. This study used fixed effects panel regression analysis to explore the relationship between the faculty gender salary gap and institutional emphasis on research as well as science and engineering. In addition, the relationship between institutional emphasis and the faculty gender salary gap was explored over time with the inclusion of a time trend and temporal interaction terms. Results showed that the higher the percentage of female faculty members, the greater the faculty gender salary gap for assistant professors. In addition, science and engineering emphasis over time had a significant impact on the professor salary gap with a decreasing effect both at the mean and one standard deviation above the …
Date:
May 2017
Creator:
Johnson, Jessica Ann (Higher education researcher)
System:
The UNT Digital Library
Some Names for Empty Space
Some Names for Empty Space is a collection of poems that considers how poetry and language operate to define human experience, reconciling the 'empty spaces' between the self and the abstracted variables of all things. The poems here often find their impetus in fatherhood and a parent's efforts to explain the world to a child.
Date:
May 2021
Creator:
Koch, Andrew (Poet)
System:
The UNT Digital Library
Extracting Possessions and Their Attributes
Possession is an asymmetric semantic relation between two entities, where one entity (the possessee) belongs to the other entity (the possessor). Automatically extracting possessions are useful in identifying skills, recommender systems and in natural language understanding. Possessions can be found in different communication modalities including text, images, videos, and audios. In this dissertation, I elaborate on the techniques I used to extract possessions. I begin with extracting possessions at the sentence level including the type and temporal anchors. Then, I extract the duration of possession and co-possessions (if multiple possessors possess the same entity). Next, I extract possessions from an entire Wikipedia article capturing the change of possessors over time. I extract possessions from social media including both text and images. Finally, I also present dense annotations generating possession timelines. I present separate datasets, detailed corpus analysis, and machine learning models for each task described above.
Date:
May 2020
Creator:
Chinnappa, Dhivya Infant
System:
The UNT Digital Library
Smartphones and Tablets: Patterns of Usage among College Student Populations
This study offers insight into students' use and desire to use mobile devices for educational purposes. I examined college students' mobile device usage on the basis of demographic factors including sex, age, ethnicity, class standing, mode of delivery, and socioeconomic status. This study also investigated factors that affect students' likelihood to use mobile devices for academic pursuits. I utilized data from the EDUCAUSE Center for Analysis and Research's (ECAR) 2015 Student Technology Survey. Of the 10,000 undergraduate respondents, 56% were female, 70% were between the ages of 18-24, 73% attended college full time and the breakdown of ethnicity included 59% Caucasian, 16% Hispanic, 13% African American, 8% Asian and 1% Native American. The results indicated that traditional aged students reportedly used smartphones more frequently, whereas non-traditional aged students reportedly used tablets more. Students most frequently reported using their devices in class to connect to the learning material. Institutional technology infrastructure and support were strong factors impacting students' use of smartphones. Results of this research can assist higher education faculty and administrators in devising comprehensive training and technology plans to support and encourage students' use of mobile devices for educational purposes.
Date:
May 2017
Creator:
Phillips, Ann (Higher education researcher)
System:
The UNT Digital Library
The Product is People: An Investigation of Missile Combat Crew Perceptions Surrounding Standardized Training Curriculum
Missile Combat Crew members are officers in the United States Air Force responsible for operating nuclear-tipped intercontinental ballistic missiles. They undergo on-the-job training as part of the curriculum necessary to progress in their careers and achieve higher levels of job responsibility. The curriculum they use is created and maintained by 20th Air Force Test and Training Section. This product is known as the Missile Combat Crew Commander Upgrade program, and it has received criticisms from stakeholders who use it for being out of date and failing to capture the necessary topics for ensuring adequate on the job training is being conducted. This project seeks to examine these critiques, break down the curriculum produced by 20th AF into stages (creation, implementation, and feedback) for evaluation, uses principles of user-oriented design drawing on design anthropology to suggest alternative methods for curriculum creation, and utilizes the results of a diagnostic survey to provide data-driven recommendations to 20th AF for future rewrites of their product based on feedback from the crew members who use their product in the field.
Date:
May 2023
Creator:
Hanel, Daniel James
System:
The UNT Digital Library
Nothing Short of Really Healthy Children: Mothers, the Children's Bureau, and Disability, 1914 - 1933
In 1931 the United States Children's Bureau asserted that "nothing short of really healthy children should satisfy parents." This thesis examines how literature published by the Children's Bureau from 1913 to 1933 shaped perceptions of motherhood and of maternal control over the body. As the bureau taught mothers how to care for their children, it also taught them that by following bureau advice, mothers could shape the bodies of their children to adhere to normative body standards. The research considers the relationship between mothers, the state, and the physical body. This thesis is divided into chapters about prenatal care and maternal marking; infant care and maternal policing; and child care and maternal control.
Date:
May 2023
Creator:
Edsall, Brooke C.
System:
The UNT Digital Library
Analysis of "The Seven Songs" From The Pilgrim's Progress By Ralph Vaughan Williams
The opera, The Pilgrim's Progress, was written by Ralph Vaughan Williams in 1949. "The Seven Songs" are analyzed for performance, examining the elements of music and text of the songs, including melody, harmony, form, vocal line and accompaniment, with the intent of forming conclusions in regard to their usefulness as singular selections, or as a group, for performance.
Date:
May 1968
Creator:
Hindman, Jannette
System:
The UNT Digital Library
Discriminative Control of Behavioral Variability in Video Game Play
Creativity can be a useful skill in today's classrooms and workplaces. When individuals talk about creativity, it's unclear what the controlling variables are when we tact behavior as "creative." Research in understanding the processes behind behaviors that are considered "creative" would assist in identifying functional relations and provide insight on how to teach creativity. Since creativity is often described as doing something different from the norm, behavioral variability may be a potential aspect of creativity. This study aimed to replicate previous findings by investigating the effects of discrimination training in a multiple schedule of varied and repetitive responding in the context of a video game. Participants played through a 2D online video game made in Bloxels. Different alternating-colored platforms served as the discriminative stimuli for the vary and repeat components. Three parameters of variability were measured (e.g., left jumps, right jumps, and double jumps). The results of the study indicate that participants were able to learn the discrimination of when to repeat and vary their responses depending on which colored platform they encountered.
Date:
May 2023
Creator:
Arias, Gabriela Isabel
System:
The UNT Digital Library
Grand Canyons: Authoritative Knowledge and Patient-Provider Connection
In 2011, African Americans in Tarrant County, Texas experienced an infant mortality rate of 14.3 per 1,000 live births. The leading cause of infant mortality in Tarrant County is prematurity and maternal nutritional status. Both maternal under-nutrition and over-nutrition are known risk factors for premature birth. Improving maternal nutrition, by reducing rates of gestational diabetes and preeclampsia, and by increasing consumption of essential prenatal vitamins and nutrients, is a road to decreasing preterm birth in African Americans. This qualitative study, based on both anthropology and public health theory, of the nutrition behavior of a group of African American expectant mothers and the experience of their health care providers and co-facilitators had a goal to provide a foundation for future development of nutrition behavior research and education for this specific population. The main finding of this study was the substantial gap of lived experience and education between the patients and their providers and co-facilitators, which hinders delivery of care and the patients’ acquiescence to nutrition recommendations. The discrepancies between the authoritative knowledge of the providers and the bodily knowledge of expectant mothers were responsible for the ineffectiveness of nutrition recommendations.
Date:
May 2015
Creator:
Fowler, Rebecca (Public health researcher)
System:
The UNT Digital Library
Multicultural Training and Program Climate in Masters Sport Psychology Programs
Little is known about the current state of multicultural training within sport psychology master's programs. The study explored students' perceptions of their multicultural training and program climate. Importantly, differences in perceptions were investigated based on students' demographic factors, given that students with marginalized identities tend to report less favorable perceptions of and experiences in graduate training. Participants (N = 107) consisted of students and recent graduates of master's level sport psychology programs. Participants reported moderate levels of feeling safe, valued, and comfortable within their master's program, low to moderate levels of multicultural training integration within their curriculum and supervision, and low to moderate satisfaction with their multicultural training. Asian, Asian American, bi/multiracial, Black, African American, Hispanic, and Latino/a/e students, compared to their White peers, reported less satisfaction with their multicultural training, felt less safe, comfortable, and valued within their programs, and perceived less integration of multiculturalism into curriculum and supervision. A multiple regression analysis revealed that, for all students, perceptions of multicultural training integration and reports of feeling safe, comfortable, and valued was significantly related to students' satisfaction with their multicultural training. Discussion focuses on possible explanations for these findings, training implications, and future research directions.
Date:
May 2023
Creator:
Arnold, Macey L.
System:
The UNT Digital Library