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open access

Bio-Inspired Material Surfaces with Self-cleaning, Micromanipulation and Water Collection

Description: Geckos are famous for the skill of switchable adhesion that they use to stick on various surface while keep their fingers super clean. In the dissertation, a unique mechanism was discovered to explain gecko self-cleaning phenomena. Using atomic force microscopy (AFM), we managed to compare the microparticle-substrate adhesion and the microparticle-seta adhesion with a single seta bonded to the AFM cantilever. A dynamic effect was approved that high pulling-off speed could increase the micropart… more
Date: May 2019
Creator: Wan, Yiyang
Partner: UNT Libraries
open access

Development and Testing of Gold(I) and Europium(III) Based Sensors for Environmental Applications

Description: This dissertation focuses on the development, characterization, and analysis of luminescent materials and coatings for sensing applications, including CO2, heavy metals, and silver. Chapter 2 involves the use of a gold(I) pyrazolate trimer that is able to detect silver ions with an AgNP medium. Detection of silver is vital, because there is an influx of silver into our environment caused by the increased use of AgNP. Therefore, having a sensor that is able to differentiate between and detect on… more
Date: May 2019
Creator: Benton, Erin Nicole
Partner: UNT Libraries
open access

Substrate Nanotopography and Stiffness Modulation of Cell Behavior

Description: The physical characteristics (i.e., nanostructure and stiffness) of the extracellular matrix where cells reside have been shown to profoundly affect numerous cellular events in vivo and also been employed to modulate cell behavior in vitro, yet how these physical cues regulate cell behavior is still elusive. Therefore, we engineered a variety of nanotopographies with different shapes and dimensions, and investigated how the nanotopographical cue, through focal adhesions-cytoskeleton-nucleus pat… more
Date: May 2019
Creator: Wang, Kai
Partner: UNT Libraries
open access

Computational Studies of C-H Bond Activation and Ethylene Polymerization Using Transition Metal Complexes

Description: This work discusses the C-H bond activation by transition metal complexes using various computational methods. First, we performed a DFT study of oxidative addition of methane to Ta(OC2H4)3A (where A may act as an ancillary ligand) to understand how A may affect the propensity of the complex to undergo oxidative addition. Among the A groups studied, they can be a Lewis acid (B or Al), a saturated, electron-precise moiety (CH or SiH), a σ-donor (N), or a σ-donor/π-acid (P). By varying A, we seek… more
Date: May 2019
Creator: Parveen, Riffat
Partner: UNT Libraries
open access

A Study on Flat-Address-Space Heterogeneous Memory Architectures

Description: In this dissertation, we present a number of studies that primarily focus on data movement challenges among different types of memories (viz., 3D-DRAM, DDRx DRAM and NVM) employed together as a flat-address heterogeneous memory system. We introduce two different hardware-based techniques for prefetching data from slow off-chip phase change memory (PCM) to fast on-chip memories. The prefetching techniques efficiently fetch data from PCM and place that data into processor-resident or 3D-DRAM-resi… more
Date: May 2019
Creator: Islam, Mahzabeen
Partner: UNT Libraries
open access

Transhumanism: An Ontology of the World's Most Dangerous Idea

Description: Transhumanism is the name given to the cultural and philosophical movement which advocates radical human technological enhancement. In what follows, I use perspectives drawn from existential philosophy to problematize transhumanists' desire to recast human finitude as a series of technical problems with technical solutions. The ontological account of transhumanism offered here questions the assumed benefit and inevitability across six chapters. Following an introductory chapter, Chapter 2 intro… more
Date: May 2019
Creator: Ross, Benjamin David
Partner: UNT Libraries
open access

The Civilian Conservation Corps in Big Bend National Park

Description: During the New Deal, the Civilian Conservation Corps (CCC) put young men to work in state and national parks across the United States. One of such parks, Big Bend National Park, is the focus of this study. The CCC had two camps within the park, one from 1934 to 1937 and another from 1940 to 1942. During their time in Big Bend, the CCC constructed many projects including a road, trails, cabins, and other various structures. The purpose of this study is to delineate the role of the CCC in creatin… more
Date: May 2019
Creator: Jackson, Kimberly
Partner: UNT Libraries
open access

Exploration of Genome Length, Burst Time, and Burst Size of Streptomyces griseus Bacteriophages

Description: Since phages use the host resources to replicate themselves after infection, the different sizes of the phage genome should influence the replication rate. We, therefore, hypothesized that the smaller genomes should burst the cell faster than the larger ones. As well, the shorter genomes would have greater burst sizes because they should replicate faster. Here, we obtained 16 phages of various genome length. All phages were isolated on Streptomyces griseus and available in our phage bank at the… more
Date: May 2019
Creator: Maneekul, Jindanuch
Partner: UNT Libraries
open access

Transgender Representation in Mainstream Advertising

Description: This study focuses on the transgender community's presence and portrayal in advertisements that reach a broad, mainstream audience base. Through a mixed-methods use of focus groups and qualitative content analysis, the content, context, and framings of ads between the years 2015 and 2018 are explored to illustrate current portrayals of the trans community and how the industry is approaching this subcultural group. Its findings contribute to advertising research by exploring curre… more
Date: May 2019
Creator: Maxwell, Bailey
Partner: UNT Libraries
open access

What Experiences do Trans* Students have during Their Time in College?

Description: Although trans* students often face greater levels of discrimination, harassment, and hostility on college campuses than their cisgender peers, research indicated that they can succeed by developing and honing survival strategies, such as resilience and being part of a trans* kinship network that resists trans* oppression. Having the support of family, and by taking the risk to cultivate relationships while in college also improves the likelihood of persistence through college. The term trans* … more
Date: May 2019
Creator: McCormick, Mary Frances
Partner: UNT Libraries
open access

News Framing and Social Media Responses to the Release of Boko Haram Female Captives

Description: This qualitative study sheds light on the framing of the sexual abuse of the Boko Haram's female captives sent to the internally displaced persons (IDP) camps and analyzes emotional themes from tweets focusing on the release of the Boko Haram's female victims, the Chibok girls. Six articles were chosen from BBC (a British news source), Punch (a Nigerian news source), and the New York Times (an American news source) to reveal the frames. In addition, 118 tweets were examined to address emotional… more
Date: May 2019
Creator: Omokore, Joy
Partner: UNT Libraries
open access

"A Very Fine Piece of Writing": Parnell and the Joycean Text, 1905-1922

Description: Charles Stewart Parnell was James Joyce's most significant political influence to a degree that has yet to be fully acknowledged or explored. This thesis proposes a "theory of Parnell" in Joyce's works up to the end of Ulysses, arguing that close attention to Parnell's evolution points to a significant shift in the evolution of Joyce's literary forms. In Joyce's juvenilia, political writings, and early fiction, Parnell always appears with a heroic, even Messianic, cast, which the most significa… more
Date: May 2019
Creator: Smith, Benjamin J.
Partner: UNT Libraries
open access

Evaluating the Effects of the D.A.N.C.E Training System on Staff and Child Responding

Description: The purpose of this study was to evaluate and systematically replicate the effectiveness of the DANCE training for a staff member to be an effective change agent for the children in her care, while maintaining the organization's and family's values. The study was conducted in an organization that values and focuses on building rapport, avoids the use of coercive procedures, and teaches children in a caring and meaningful way. A multiple baseline across indoor and outdoor settings was used to ev… more
Date: December 2019
Creator: Morales, Erendira
Partner: UNT Libraries
open access

A Shaping Procedure for Introducing Horses to Clipping

Description: The purpose of the current study is to evaluate a procedure that can be used to introduce horses to clipping. Negative reinforcement was used in a shaping paradigm. Shaping steps were conducted by the handler, starting with touching the horse with the hand, then touching the horse with the clippers while they are off, culminating with touching the horse with the clippers while they are on. When a horse broke contact with either the hand or the clippers, the hand or the clippers were held at tha… more
Date: December 2019
Creator: Hardaway, Alison K
Partner: UNT Libraries
open access

The Effects of D.A.N.C.E. Training on Staff Teaching Interactions, Child Goal Responding, and Staff-Child Harmonious Engagement in an Autism Intervention Organization

Description: This study was conducted at a nonprofit organization whose mission is to provide responsive, caring, and effective services to children with autism. The purpose of this study was to analyze the effects of D.A.N.C.E. training on teaching interactions, harmonious engagement, instructional engagement, and progress on child goals for two early and intensive behavioral intervention (EIBI) staff and the children in their care. A multiple baseline design was employed to evaluate the effectiveness of t… more
Date: December 2019
Creator: Tavera, Marlene Lucy
Partner: UNT Libraries
open access

Looking for Quantitative and Qualitative Measures of Teaching Interactions: A Preliminary Analysis

Description: Indicators of quality early intensive behavioral intervention (EIBI) include comprehensive interventions, adequately trained staff, high rates of effective instruction delivery, happy interactions between children and their teachers, and socially valid outcomes. When these are in place, high quality EIBI is more likely to increase progress that children with autism make during treatment. When not in place, progress is not as likely, as rapid, or as meaningful. To date, there is limited research… more
Date: May 2019
Creator: Weir, Jade
Partner: UNT Libraries
open access

How You Correct Matters

Description: Feedback is used in a variety of contexts to train staff and to teach individuals new skills. Despite its popularity, there is no consensus on how to deliver it. Different measures have been used to evaluate the effectiveness of feedback, such as accuracy of responses and the sequencing of feedback delivery. The purpose of this study was to compare two feedback procedures and to explore new ways to measure the effectiveness of feedback. Four undergraduate students were exposed to two conditions… more
Date: May 2019
Creator: Winne, Jessica Kay
Partner: UNT Libraries
open access

The Effect of Processing Conditions on the Surface Morphology of Few-Layered WS2 Thin Films

Description: Recent progress in layered transition metal dichalcogenides (TMDs) has led to various promising electronic and optoelectronic applications. However, the structure of materials plays a critical role in electronic and optoelectronic devices, and determines performance. Electronic and optoelectronic devices typically consist of multiple layers that form electrical homojunctions or heterojunctions. Therefore, in a device it can be expected that a WS2 layer may serve as the substrate for a subseque… more
Date: May 2019
Creator: Cai, Bimin
Partner: UNT Libraries
open access

Building a Collaborative Smartphone Application for Blind and Low Vision Visitors at the Dallas Museum of Art

Description: The goal of my study is to develop a mobile application to enable all visitors, including blind and low-vision visitors, to autonomously gather and share information about interpretations of art and to have a fully independent museum-going experience. With an application, blind visitors have more access to opportunities and tools in the museum, which empowers their museum experience. My study used a qualitative, mixed-methods approach to research how blind and low vision museum visitors might i… more
Date: May 2019
Creator: Aljuidan, Hanan Abdulaziz M.
Partner: UNT Libraries
open access

Topology and Lattice-Based Structural Design Optimization for Additively Manufactured Medical Implants

Description: 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 setu… more
Date: May 2019
Creator: Peto, Marinela
Partner: UNT Libraries
open access

Universal Pre-K as a Vehicle for Reversing the Impact of Historic Racial Segregation in the United States

Description: Not all children begin their educational journey on equal footing. The purpose of this study is to investigate how universal prekindergarten (UPK) can serve as a key to remedying issues surrounding educational inequity. In order to understand educational inequity, I dive into the history of neighborhood racial segregation in the United States, and how it led to our currently unjust system. Racial segregation, specifically city zoning laws, created racially separate neighborhoods that are still … more
Date: May 2019
Creator: Bartley, Sarah
Partner: UNT Libraries
open access

Hispanic Students' Perceptions of How Well Public High School Prepared Them for College

Description: Although Hispanics are graduating from high school at greater rates, it is not leading to college success as college graduation rates remain low. In Texas, the Hispanic population has grown to the point that one out of three of all Texans are Hispanic. A phenomenological approach to research was used to investigate the perceptions of Hispanic college students on how well their public high school prepared them for college. Through face-to-face interviews and focus group discussions, eight Hisp… more
Date: May 2019
Creator: Soto, Lionel
Partner: UNT Libraries
open access

Renewal and Memory Approaches to Study Biological and Physiological Processes

Description: In nature we find many instances of complex behavior for example the dynamics of stock markets, power grids, internet networks, highway traffic, social networks, heartbeat dynamics, neural dynamics, dynamics of living organisms, etc. The study of these complex systems involves the use of tools of non-linear dynamics and non-equilibrium statistical physics. This dissertation is devoted to understanding two different sources of complex behavior – non-poissonian renewal events also called crucial… more
Date: May 2019
Creator: Tuladhar, Rohisha
Partner: UNT Libraries
open access

Decision Making in Alternative Modes of Transportation: Two Essays on Ridesharing and Self-Driving Vehicles

Description: This manuscript includes an investigation of decision making in alternative modes of transportation in order to understand consumers' decision in different contexts. In essay 1 of this study, the motives for participation in situated ridesharing is investigated. The study proposes a theoretical model that includes economic benefits, time benefits, transportation anxiety, trust, and reciprocity either as direct antecedents of ridesharing participation intention, or mediated through attitude towa… more
Date: May 2019
Creator: Amirkiaee, Seyede Yasaman
Partner: UNT Libraries
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