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Teacher Perceptions of Student Engagement as Related to Technology Implementation in the Classroom

Description: The challenges of at-risk students are not new. Newspaper articles from the 1860s presented information about communities seeking to help students to complete school and find employment to provide a livable wage. Today's solutions focus on legislation intended to affect societal change and provide equitable opportunities for at-risk students. Much research regarding how to improve academic outcomes for at-risk students addresses high school level, identifying those factors that encourage second… more
Date: December 2018
Creator: Mata, Jodi Lane
Partner: UNT Libraries
open access

Application of Statistical Physics in Human Physiology: Heart-Brain Dynamics

Description: This dissertation is devoted to study of complex systems in human physiology particularly heartbeats and brain dynamics. We have studied the dynamics of heartbeats that has been a subject of investigation of two independent groups. The first group emphasized the multifractal nature of the heartbeat dynamics of healthy subjects, whereas the second group had established a close connection between healthy subjects and the occurrence of crucial events. We have analyzed the same set of data and esta… more
Date: August 2018
Creator: Bohara, Gyanendra
Partner: UNT Libraries
open access

Exposure to Nanomaterials Results in Alterations of Inflammatory and Atherosclerotic Signaling Pathways in the Coronary Vasculature of Wildtype Rodents

Description: Cardiovascular disease (CVD) is the leading cause of death for people of most ethnicities on a global scale, and countless research efforts on the pathology of CVD has been well-characterized over the years. However, advancement in modern technologies, such as nanotechnology, has generated environmental and occupational health concerns within the scientific community. Current investigation of nanotoxicity calls into question the negative effects nanomaterials may invoke from their environmental… more
Date: August 2018
Creator: Davis, Griffith M.
Partner: UNT Libraries
open access

Elementary Students' Perceptions of Their Authentic Engagement when Using iPads in the Classroom

Description: The purpose of this study was to examine the impact of a 1:1 iPad initiative on student engagement in the classroom, as perceived by students. The design of this case study consisted of a purposeful sample of six, 5th grade students from a suburban elementary school in North Central Texas who participated in surveys, individual interviews, and focus group discussions. Two research questions guided this study: (1) How do elementary school students perceive they are authentically engaged when usi… more
Date: December 2018
Creator: Hayunga, Kelly Lynn
Partner: UNT Libraries
open access

Eating Disorder Diagnosis and the Female Athlete: From College Sport to Retirement

Description: Female athletes have been established as a high-risk group for disordered eating due to the high prevalence rates of clinical (i.e., 1.9% to 19.9%) and subclinical eating disorders (i.e., 7.1% to 49.2%). To date, only a few studies have examined the long-term stability of eating disorders in collegiate female athletes, a design that will allow examination of change in prevalence rates over time. Additionally, researchers have attempted to identify psychosocial risk factors in the development of… more
Date: August 2018
Creator: Thompson, Alexandra Jo
Partner: UNT Libraries
open access

Optoelectronically Active Metal-Inorganic Frameworks and Supramolecular Extended Solids

Description: Metal-organic frameworks (MOFs) have been intensely researched over the past 20 years. In this dissertation, metal-inorganic frameworks (MIFs), a new class of porous and nonporous materials using inorganic complexes as linkers, in lieu of traditional organic linkers in MOFs is reported. Besides novel MIF regimes, the previously described fluorous MOF "FMOF-1", is re-categorized herein as "F-MIF1". F-MIF-1 is comprised of [Ag4Tz6]2- (Tz = 3,5-bis-trifluoromethyl-1,2,4-triazolate) inorganic clust… more
Date: August 2018
Creator: Ivy, Joshua F.
Partner: UNT Libraries
open access

Using the Abraham Solvation Parameter Model to Predict Solute Transfer into Various Mono- and Multi-Functional Organic Solvents

Description: The Abraham Solvation Parameter Model (ASPM) is a linear, free-energy relationship that can be used to predict various solute properties based on solute-solvent interactions. The ASPM has been used to predict log (K or Cs,organic/Cs,gas) values, as well as log (P or Cs,organic/Cs,water) values for solute transfer into the following organic solvents: 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol, 2-isopropoxyethanol and 2-butoxyethanol. The derived log (K or Cs,organic/Cs,gas) correlations… more
Date: May 2018
Creator: Hart, Erin F
Partner: UNT Libraries
open access

Simultaneous Electrophysiological and Morphological Assessment of Impact Damage to Nerve Cell Networks

Description: A ballistic pendulum impulse generator was used to impact networks in primary culture growing on microelectrode arrays. This approach has the advantage of imparting pure tangential acceleration insults (50 to 300 g) with simultaneous morphological and electrophysiological multichannel monitoring for days before and after the impact. Action potential (AP) production, network activity patterns, and cell electrode coupling of individual units using AP waveshape templates were quantified. Network … more
Date: May 2018
Creator: Rogers, Edmond A.
Partner: UNT Libraries
open access

Uniserial Representations of Vec(R) with a Single Casimir Eigenvalue

Description: In 1980 Feigin and Fuchs classified the length 2 bounded representations of Vec(R), the Lie algebra of polynomial vector fields on the line, as a result of their work on the cohomology of Vec(R). This dissertation is concerned mainly with the uniserial (completely indecomposable) representations of Vec(R) with a single Casimir eigenvalue and weights bounded below. Such representations are composed of irreducible representations with semisimple Euler operator action, bounded weight space dimensi… more
Date: May 2018
Creator: Kuhns, Nehemiah
Partner: UNT Libraries
open access

The Impact of Teacher Professional Development on Student Achievement at a North Texas High School as Measured by End-of-Course Assessments in Algebra I and English Language Arts

Description: The purpose of this study determined if a significant relationship existed between the amount of professional development that teachers participated in and the impact on the classroom instruction that followed. The goal was to study the effect that this had on student achievement in the State of Texas Assessment of Academic Readiness (STAAR) for English 1 and Algebra 1 for students at a large north Texas high school. Testing years for the study included the school years 2013-14, 2014-15, and … more
Date: August 2018
Creator: Younkman, Freddy W
Partner: UNT Libraries
open access

The Role of Thyroid Hormone on the Development of Endothermy in White Leghorn Chickens (Gallus gallus)

Description: As chickens hatch, there is a rapid change in their physiology and metabolism associated with attaining endothermy. It is thought that thyroid hormones (TH) play a major role in regulating developmental changes at hatching. In birds, TH regulates skeletal muscle growth, which has a direct impact on the chick's ability to thermoregulate via shivering thermogenesis. To better understand the role of TH in the timing of hatching, development of thermogenic capacity, and metabolic rate, we manipu… more
Date: August 2018
Creator: Rippamonti, Jessica D.
Partner: UNT Libraries
open access

A Man Needs a Female like a Fish Needs a Lobotomy: The Role of Adjectival Nominalization in Pejorative Meaning

Description: This thesis documents the grammatical processes and semantic impact of innovative ways to pejoratively reference individuals through adjectival nominalization. Research on nominalized adjectives suggests that when meanings shift from having one property (1) to becoming a kind with associated properties (2), the noun form often encodes stereotypical attributes: [1] "Her hair is blonde." (hair color); [2] "He married a blonde." (female, sexy, dumb). Likewise, the linguistic phenomenon of generic… more
Date: May 2018
Creator: Robinson, Melissa Aubrey
Partner: UNT Libraries
open access

Resistance Exercise and Alcohol: Combined Effects on Physiology and Performance

Description: Resistance exercise (RE) training is a well-known and effective method for promoting increases in muscle mass and strength. A single bout of RE induces physiological disturbances that require coordinated activation of the immune system and intramuscular signaling in order to return the tissue to homeostasis and adapt to the RE challenge. On the other hand, acute binge alcohol consumption can affect the immune response to an inflammatory challenge, intramuscular anabolic signaling, and muscle pr… more
Date: August 2018
Creator: Levitt, Danielle E.
Partner: UNT Libraries
open access

Mechanisms of Formation and Effects of Transition Metal Oxides in Silicon Nitride on Steel Dry Sliding Contacts

Description: Silicon nitride on steel sliding contacts may provide advantageous tribological properties over traditional self-mated pairs, however the friction and wear behavior at high sliding speeds (>1 m/s) is not well understood. Previous studies at low sliding speeds (< 1 m/s) have found that the wear mechanisms change as a function of the operating parameters, e.g. atmosphere, sliding speed, load, and temperature, due to the formation of transition metal oxides such as Fe2O3 and Fe3O4. This study dete… more
Date: December 2018
Creator: Harris, Michael D.
Partner: UNT Libraries
open access

Compartmentalization of Jojoba Seed Lipid Metabolites

Description: Seeds from the desert shrub Simmondsia chinensis (jojoba) are one of the only known natural plant sources to store a majority of its oil in the form of liquid wax esters (WE) instead of triacylglycerols (TAGs) and these oils account for ~55% of the seed weight. Jojoba oil is highly valued as cosmetic additives and mechanical lubricants, yet despite its value much is still unknown about its neutral lipid biosynthetic pathways and lipid droplet packaging machinery. Here, we have used a multi-"omi… more
Date: December 2018
Creator: Sturtevant, Drew
Partner: UNT Libraries
open access

High-Energy, Long-Lived Charge-Separated States via Molecular Engineering of Triplet State Donor-Acceptor Systems

Description: Molecular engineering of donor-acceptor dyads and multimodular systems to control the yield and lifetime of charge separation is one of the key goals of artificial photosynthesis for harvesting sustainably solar energy. The design of the donor-acceptor systems mimic a part of green plants and bacterial photosynthetic processes. The photochemical events in natural photosynthesis involve the capturing and funneling of solar energy by a group of well-organized chromophores referred to as an ‘anten… more
Date: August 2018
Creator: Obondi, Christopher O
Partner: UNT Libraries
open access

Contingency Management of Physical Rehabilitation: The Role of Feedback

Description: Modern advances in technology have allowed for an increase in the precision with which we are able to measure, record, and affect behavior. These developments suggest that the domains in which behavior analysis might contribute are considerably broader than previously appreciated, for instance the area of behavioral medicine. One way the field of behavior analysis can begin to address problems in behavioral medicine is with biosensor technology, like surface electromyography (sEMG). For sEMG te… more
Date: December 2018
Creator: Armshaw, Brennan P
Partner: UNT Libraries
open access

Supply Chain Learning: A Grounded Theory Analysis

Description: Under the unifying theme of supply chain learning, this three essay dissertation extends scholarship by investigating these multi-tier relationships. Theory is emerged, grounded in data, gathered from functioning supply chains in an effort to provide scholars and practitioners with an increased understanding of the SCL phenomena. Essay 1, entitled "Supply Chain Learning: An Exploratory Literature Review" examines the current literature in an attempt to address the shortcomings and emerge areas… more
Date: August 2018
Creator: Morgan, Thomas V.
Partner: UNT Libraries
open access

The Trident of Corporate Corruption Control: Implications and Effects

Description: Corporate corruption is a widespread phenomenon that persists in the functioning of both public and private companies of differing size, performance, industry, and national origin. As it generates negative effects both within and outside the organization, corporate corruption has been the subject of scholarly research. Yet, despite attempts to understand its antecedents and consequences, companies continue to struggle to eliminate corruption in their business practices. Thus, the overarching re… more
Date: December 2018
Creator: Orudzheva, Leyla
Partner: UNT Libraries
open access

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.
Partner: UNT Libraries
open access

Superbursts: Investigation of Abnormal Paroxysmal Bursting Activity in Nerve Cell Networks In Vitro

Description: Superbursts (SBs) are large, seemingly spontaneous activity fluctuations often encountered in high density neural networks in vitro. Little effort has been put forth to define and analyze SBs which are paroxysmal bursting discharges. Through qualitative and quantitative means, I have described specific occurrences of superbursting activity. A complex of paroxysmal bursting has been termed a "superburst episode," and each individual SB is a "superburst event" which is comprises a fine burst stru… more
Date: May 2018
Creator: Suri, Nikita
Partner: UNT Libraries
open access

Exploring Growth Kinematics and Tuning Optical and Electronic Properties of Indium Antimonide Nanowires

Description: This dissertation work is a study of the growth kinematics, synthesis strategies and intrinsic properties of InSb nanowires (NWs). The highlights of this work include a study of the effect of the growth parameters on the composition and crystallinity of NWs. A change in the temperature ramp-up rate as the substrate was heated to reach the NW growth temperature resulted in NWs that were either crystalline or amorphous. The as-grown NWs were found to have very different optical and electrical pro… more
Date: December 2018
Creator: Algarni, Zaina Sluman
Partner: UNT Libraries
open access

Computational Investigation of DNA Repair Enzymes: Determination and Characterization of Cancer Biomarkers and Structural Features

Description: Genomic integrity is important for living cells' correct functioning and propagation. Deoxyribonucleic acid as a molecule is a subject to chemical reactions with agents that can come from environment as well as from internal metabolism processes. These reactions can induce damage to DNA and thus compromise the genetic information, and result in disease and death of an organism. To mitigate the damage to DNA, cells have evolved to have multiple DNA repair pathways. Presented here is a computat… more
Date: May 2018
Creator: Silvestrov, Pavel
Partner: UNT Libraries
open access

Peeling Back the Layers of Ambidexterity in Multi-Business Firms

Description: There is a dual accountability accepted by top executives of large multi-business firms (MBFs) to both consistently deliver performance in the short term and cultivate scalable opportunities for future growth, which requires that they be able to implement both evolutionary and revolutionary change. Researchers have defined this capability as organizational ambidexterity (OA) and deemed it a crucial requirement for every organization. Literature in the field of organizational ambidexterity (OA) … more
Date: December 2018
Creator: Struckell, Beth Maney
Partner: UNT Libraries
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