Search Results

open access

Theory of ordering transformations in metals and minerals

Description: This dissertation presents an investigation of ordering in FCC based systems using the pair potential approximation in the ground state and mean field limits. The theoretical approach is used to explain the occurrence of observed equilibrium phases and characteristics of thermodynamic instabilities, in particular, spinodal ordering and decomposition. It is shown that the stability of non-integer domain sizes in long period superstructures such as Al{sub 3}Ti and Ag{sub 3}Mg may result from the … more
Date: July 1, 1991
Creator: Lindsey, Timothy Francis
Partner: UNT Libraries Government Documents Department
open access

The Effects of Computer Performance Assessment on Student Scores in a Computer Applications Course

Description: The goal of this study was to determine if performance-based tests should be routinely administered to students in computer application courses. The purpose was to determine the most appropriate mode of testing for individuals taking a computer applications course. The study is divided into areas of assessment, personality traits, and computer attitudes.
Date: July 1994
Creator: Casey, Sue Hartness
Partner: UNT Libraries
open access

Spatiotemporal Properties of Coupled Nonlinear Oscillators

Description: Spatiotemporal properties of classical coupled nonlinear oscillators are investigated in this thesis. Chapter 1 gives an introduction to nonlinear lattices and to the concept of breathers, that are spatially localized and temporally periodic excitation in nonlinear lattices. The concept of anti-continuous limit that provides the basic methodology in probing spatiotemporal breather properties is discussed. In Chapter 2, the general approach for finding exact breather solutions from the anti-cont… more
Date: July 1996
Creator: Chen, Ding
Partner: UNT Libraries
open access

A Machine Learning Method Suitable for Dynamic Domains

Description: The efficacy of a machine learning technique is domain dependent. Some machine learning techniques work very well for certain domains but are ill-suited for other domains. One area that is of real-world concern is the flexibility with which machine learning techniques can adapt to dynamic domains. Currently, there are no known reports of any system that can learn dynamic domains, short of starting over (i.e., re-running the program). Starting over is neither time nor cost efficient for real-wor… more
Date: July 1996
Creator: Rowe, Michael C. (Michael Charles)
Partner: UNT Libraries

Information Privacy and Security Associated with Healthcare Technology Use

Description: This dissertation consists of three studies that investigate the information privacy & security associated with healthcare technology use. Essay 1 PRISMA-style systematically reviews the existing literature on privacy information disclosure in IoT technology and serves as the theoretical foundation of the current research. It is crucial to comprehend why, how, and under what consequences individuals choose to disclose their personal and health information since doing so is beneficial to the com… more
This item is restricted from view until August 1, 2028.
Date: July 2023
Creator: Amin, M A Shariful
Partner: UNT Libraries

Exposure to Trauma and Its Effect on Information-Seeking Behaviors and Decision-Making Processes

Description: This dissertation examines the impact of trauma on information-seeking behaviors and decision-making processes. Essay 1 includes a qualitative analysis of the transcripts obtained from interviews with four military service members diagnosed with PTSD. The results showed that 75% of this small sample population exhibited addictive behavior that was presented in their information behaviors. All four members indicated that the excessive extent to which they seek information is related to the perce… more
This item is restricted from view until August 1, 2025.
Date: July 2023
Creator: Fantasia, Anthony Thomas
Partner: UNT Libraries
open access

An Examination of the Metaverse Technology Acceptance Model in Tourism

Description: The traditional definition of tourism has been transformed by significant advancements in communication and information technology. The concept of Metaverse, derived from the words "meta" (meaning beyond) and "verse" (meaning universe), has redefined how people experience travel. This innovative concept combines virtual reality, augmented reality, and artificial intelligence to create virtually augmented spaces. However, the tourism industry should clarify and narrow down the definition of Meta… more
Date: July 2023
Creator: Lee, Sangyung
Partner: UNT Libraries
open access

An Assessment of Digital Stimulus Prompts to Teach Conditional Discriminations to Children with Autism

Description: Effective and efficient skill-acquisition procedures must be identified to support individualized behavioral programming for children with autism spectrum disorder (ASD). To do this, practitioners and researchers may use assessment-based instruction. Prompts are a common teaching strategy to promote skill acquisition. The purpose of this applied study was to use assessment-based instruction to evaluate the efficacy and efficiency of within- and extra-stimulus prompts to teach conditional discri… more
Date: July 2023
Creator: Niland, Haven Sierra
Partner: UNT Libraries
open access

Sustainable Healthcare Provider OUD Assessment and Management in Rural Native American Communities (RNACs): Prevention, Treatment, and Recovery Approaches

Description: In the US, rural Native American communities (RNACs) experience excess morbidity in mental health disorders and mortality from opioid use disorder (OUD). This study used mixed methods to evaluate and analyze the primary data from 76 healthcare providers (HPs) from 24 states across the US (physicians = 7%), to identify HP knowledge and training regarding available prevention, treatment, and recovery (PTR) programs in treating OUD, assessment and management skills, and networking and collaboratio… more
Date: July 2023
Creator: Mincer, Wendy Faye
Partner: UNT Libraries
open access

An Examination of Communication Patterns, Relationship Satisfaction, and Mental Health Symptoms in IPV-Exposed Women With and Without a History of Child Abuse

Description: Extant research suggests communication styles (CS) such as constructive communication (CC) to be associated positively with relationship satisfaction (RS) and negatively with mental health (MH) whereas self-demand / partner withdraw (SD/PW) communication is associated negatively with RS and positively with MH. Research also suggests child abuse (CA) to be associated with poorer CS, lower RS, and poorer MH. Further, RS has been differentially associated with MH and CS in adult intimate relations… more
Date: July 2023
Creator: Griffith, Elizabeth L.
Partner: UNT Libraries

Structural Design and Its Impact on Thermal Efficiency and Corrosion of All-Aluminum Microchannel Heat Exchangers

Description: In this study, high-fidelity conjugate heat transfer simulations are used to model a micro-channel heat exchanger (MCHE) in a crossflow to study its thermal-hydraulic performance. This study considers three different microchannels (internal flow) geometries (circular, triangular, and square) with louver-shaped fins. The local flow field showed a strong coupling between the microchannel flow, solid domain, and crossflow. The flow separation and wake regions formed near MCHE resulted in a large v… more
Date: July 2023
Creator: Ahmed, Hossain
Partner: UNT Libraries
open access

Preservice Teachers' Readiness to Integrate Technology into Instruction: Reflections from Texas Education Agency's Exit Survey

Description: This purpose of this study examined the effectiveness in technology integration among Texas educator preparation pathways and identified successful approaches in developing the technology competencies of preservice teachers. Existing data collected by the Texas Education Agency's Exit Survey by preservice teachers completing an educator preparation program was used to conduct a quantitative study. Data was imported into SPSS to conduct statistical analysis. The findings are discussed and recomm… more
Date: July 2023
Creator: Ware, Shelby Lane
Partner: UNT Libraries
open access

Politics and the Piano during the Great Proletarian Cultural Revolution in China: An Analysis of Three Piano Works, "Music at Sunset" (1975), "Hundreds of Birds Paying Homage to the Phoenix" (1973), and "Liuyang River" (1972)

Description: As a political disturbance and social movement, the Cultural Revolution hugely impacted the development of Chinese piano art. The piano went through many stages throughout this ten-year period. This dissertation examines the suppression and later expansion of piano music in China during the Cultural Revolution, along with the historical motivations and forces that shaped each stage of its development. The study is supported by historical documents and relevant literature. This dissertation incl… more
Date: July 2023
Creator: Liu, Yuanshi
Partner: UNT Libraries
open access

Prokofiev's Piano Sonata No. 4 in C Minor, Op. 29 (1917): A Performance Guide based on Interpretations by György Sándor and Boris Berman

Description: One of the famous Russian composers and a pianist himself, Sergei Prokofiev (1891–1953) composed a vast quantity of piano music. His nine piano sonatas represent well how he projected his musical individuality and the principles that he addressed in his autobiography: classical line, modern trend, toccata line, lyrical line, and grotesque line. However, even though Prokofiev's piano sonatas are considered one of the important collections in the piano repertoire, not all of them have gained popu… more
Date: July 2023
Creator: Cho, Soyoung
Partner: UNT Libraries

Neurotoxic Effects of Polycyclic Aromatic Hydrocarbons in Vertebrates, from Behavioral to Cellular Levels

Description: Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental toxicants found in anthropogenic mixtures such as crude oil, air pollution, vehicle exhaust, and in some natural combustion reactions. Single PAHs such as benzo[a]pyrene (BaP) also impact fish behavior when animals are exposed in early life stages and for short periods of time. Aquatic animals such as fish may encounter BaP through road runoff and oil spills, but few studies have examined the impact of aqueous exposure on adul… more
This item is restricted from view until August 1, 2025.
Date: July 2023
Creator: Dunton, Alicia D.
Partner: UNT Libraries

Exploring the Dimensions of the Learning Organization Questionnaire (DLOQ) for Startup Learning Environments

Description: Although the Dimensions of the Learning Organization Questionnaire (DLOQ) has been widely accepted by the HRD community, it has not been tested in a startup context for reliability. The purpose of the current study is to explore if the DLOQ is a reliable instrument for startups to help them be more successful. The current study seeks to address some of the questions, which have been posed by previous researchers. The study utilizes a mixed-method design applying Cronbach alpha values to check t… more
This item is restricted from view until August 1, 2025.
Date: July 2023
Creator: Morris, Mark Orlando
Partner: UNT Libraries
open access

Exploring Uses of Automated Essay Scoring for ESL: Bridging the Gap between Research and Practice

Description: Manually grading essays and providing comprehensive feedback pose significant challenges for writing instructors, requiring subjective assessments of various writing elements. Automated essay scoring (AES) systems have emerged as a potential solution, offering improved grading consistency and time efficiency, along with insightful analytics. However, the use of AES in English as a Second Language (ESL) remains rare. This dissertation aims to explore the implementation of AES in ESL education to… more
Date: July 2023
Creator: Tesh, Geneva Marie
Partner: UNT Libraries

Selection Bias and Sensitivity as Moderators of Prekindergarten Age-Cutoff Regression Discontinuity Study Effects: A Meta-Analysis

Description: The age-cutoff regression discontinuity design (RDD) has emerged as one of the most rigorous quasi-experimental approaches to determining program effects of prekindergarten on literacy and numeracy outcomes for children at kindergarten entry. However, few pre-K meta-analyses have focused attention on validity threats. The current random-effects meta-regression tests the moderating effects of prominent threats to validity, selection bias and sensitivity, on impact estimates generated from age-cu… more
This item is restricted from view until August 1, 2024.
Date: July 2023
Creator: Stewart, Genea K.
Partner: UNT Libraries

Synthesis and Studies of Platinum- and Palladium-Based Porphyrin-Fullerene Conjugates to Study the Long-Lived Charge-Separated States

Description: The research presented in the dissertation deals with the synthesis, characterization, photophysical, electrochemical, and pump probe studies of porphyrin-fullerene based donor-acceptor conjugates. The first chapter provides insights into the introduction of the thesis, which explains the events that occur in natural photosynthesis and the mimicking process of an artificial photosynthesis based on natural photosynthesis, works done in covalently and non-covalently linked donor acceptor systems,… more
Date: July 2023
Creator: Subedi, Dili Raj
Partner: UNT Libraries

Stories and "Burning Man"

Description: Stories and a novel.
This item is restricted from view until August 1, 2028.
Date: July 2023
Creator: Ray, T. Scott
Partner: UNT Libraries
open access

Scalable Next Generation Blockchains for Large Scale Complex Cyber-Physical Systems and Their Embedded Systems in Smart Cities

Description: The original FlexiChain and its descendants are a revolutionary distributed ledger technology (DLT) for cyber-physical systems (CPS) and their embedded systems (ES). FlexiChain, a DLT implementation, uses cryptography, distributed ledgers, peer-to-peer communications, scalable networks, and consensus. FlexiChain facilitates data structure agreements. This thesis offers a Block Directed Acyclic Graph (BDAG) architecture to link blocks to their forerunners to speed up validation. These data block… more
Date: July 2023
Creator: Alkhodair, Ahmad Jamal M
Partner: UNT Libraries

Next Generation Friction Stir Welding Tools for High Temperature Materials

Description: The historical success of friction stir welding (FSW) on materials such as aluminum and magnesium alloys is associated with the absence of melting and solidification during the solid-state process. However, commercial adoption of FSW on steels and other non-ferrous high-strength, high-temperature materials such as nickel-base and titanium-base alloys is limited due to the high costs associated with the process. In this dissertation, the feasibility of using an FSW approach to fabricate certain … more
This item is restricted from view until August 1, 2028.
Date: July 2023
Creator: Gaddam, Supreeth
Partner: UNT Libraries
open access

The Mentorship Experiences of Black Masters Students in CACREP-Accredited Counselor Education Programs

Description: Within this research study, a qualitative phenomenological approach was used to explore the lived experiences of Black master's students (n = 10) who engage in mentorship in CACREP-accredited counselor education programs. The participants in this study represent different ACES regions in the United States, including SACES, NARACES, and NCACES. Six themes were discovered as a result of participants' experiences: (a) impact of mentorship, (b) benefits of mentorship, (c) qualities within mentoring… more
Date: July 2023
Creator: Smith, Hailey Brierre
Partner: UNT Libraries
Back to Top of Screen