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open access

Utilizing Rapid Mass Spectrometry Techniques to Profile Illicit Drugs from Start to Finish

Description: The increasingly complex world of illicit chemistry has created a need for rapid, selective means of determining the threat posed by new drugs as they are encountered by law enforcement personnel. To streamline this process, the entirety of the problem, from the production of illicit drugs all the way to the final analysis have been investigated. A series of N-alkylated phenethylamine analogues were synthesized in a shotgun method and subjected to direct-infusion analysis. A range of products w… more
Date: August 2018
Creator: McBride, Ethan
Partner: UNT Libraries
open access

Perceived Impacts of a Study Abroad Experience on In-Service Teachers' Practices

Description: This phenomenological multiple case study provides the details, reasoning, and discussion of the role of study abroad experience and its perceived impact(s) on three in-service teachers. Two research questions were posed: What are the perceived impacts on in-service teachers' practice of a study abroad program experience and how does the in-service teacher's perception of impact change over time within a teacher's career? Results of this study suggest that the teaching practice of in-service te… more
Date: August 2018
Creator: Felts, Mark T
Partner: UNT Libraries
open access

Physical Activity and Relationship Functioning: Mediation Roles of Sexual Satisfaction and Self-Esteem

Description: Little research has examined the role of physical activity in relationship functioning. Utilizing two heterosexual subsamples of 618 females and 155 males, results indicated that physical activity was positively correlated with sexual satisfaction and self-esteem for the female subsample, but was not significant for the male subsample. For both subsamples, although physical activity was not a significant unique predictor of relationship functioning in regression analyses, sexual satisfaction an… more
Date: August 2018
Creator: Schumacher, Matthew Robert
Partner: UNT Libraries
open access

Computational Methods to Optimize High-Consequence Variants of the Vehicle Routing Problem for Relief Networks in Humanitarian Logistics

Description: Optimization of relief networks in humanitarian logistics often exemplifies the need for solutions that are feasible given a hard constraint on time. For instance, the distribution of medical countermeasures immediately following a biological disaster event must be completed within a short time-frame. When these supplies are not distributed within the maximum time allowed, the severity of the disaster is quickly exacerbated. Therefore emergency response plans that fail to facilitate the transpo… more
Date: August 2018
Creator: Urbanovsky, Joshua C.
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

Dataflow Processing in Memory Achieves Significant Energy Efficiency

Description: The large difference between processor CPU cycle time and memory access time, often referred to as the memory wall, severely limits the performance of streaming applications. Some data centers have shown servers being idle three out of four clocks. High performance instruction sequenced systems are not energy efficient. The execute stage of even simple pipeline processors only use 9% of the pipeline's total energy. A hybrid dataflow system within a memory module is shown to have 7.2 times t… more
Date: August 2018
Creator: Shelor, Charles F.
Partner: UNT Libraries
open access

The Roles of Coaches, Peers, and Parents in High School Athletes' Motivational Processes: A Mixed-Methods Study

Description: Grounded in self-determination theory and achievement goal theory, the purpose of this mixed-methods study was to examine the underlying motivational processes from social environments created by coaches, peers, and parents to motivational outcomes in high school athletes, with an emphasis on the relative influence of social agents in basic psychological needs (i.e., autonomy, competence, and relatedness). The quantitative part of this study tested a hierarchical model of high school sport moti… more
Date: August 2018
Creator: Chu, Tsz Lun
Partner: UNT Libraries
open access

Subjective Efficiencies: Water Use, Management and Governance in the North Platte Natural Resources District

Description: The North Platte Natural Resources District (NPNRD) is one of 23 quasi-governmental organizations in the state of Nebraska that are organized by river basin and are responsible for the management of groundwater. Conversely, the state's surface water is governed by the Nebraska Department of Natural Resources under the system of prior appropriation. This study uses Foucauldian neoliberal governmentality and a contrasting theory of 'meandering' to explore the conflicting beliefs, perceptions and … more
Date: August 2018
Creator: Miller, Elizabeth
Partner: UNT Libraries
open access

Putting Bullying into Perspective: Peer Aggression as a Function of Perspective Taking, Empathy, and Psychological Willingness

Description: Bullying has long-term negative effects on the mental health and wellbeing of everyone involved. School-wide interventions have been successful in some contexts, but they often require significant institutional and financial resources. Empathy is comprised of a cognitive component (perspective taking) and an affective component (empathic concern), both of which may be necessary for prosocial behavior. According to relational frame theory (RFT), empathy involves a transformation of stimulus func… more
Date: August 2018
Creator: Moyer, Danielle N.
Partner: UNT Libraries
open access

Performance Editions of Three Works for Winds by Gyorgy Druschetzky

Description: Gyorgy Druschetzky was a noted Czech composer of Harmoniemusik, who wrote more than 150 partitas and serenades, along with at least thirty-two other selections for larger wind groups. This is in addition to twenty-seven symphonies, eleven concertos (most for wind instruments), two fantasias, forty-seven string quartets, two operas, a ballet that is lost, and other miscellaneous chamber music for various combinations of wind/string instruments. Three of his works for winds have existed only in m… more
Date: August 2018
Creator: McDannald, Brandon K.
Partner: UNT Libraries
open access

Two Argentine Song Sets: A Comparison of Songs by De Rogatis and Ginastera

Description: Latin American classical vocal repertoire is vast, but in the United States, we only hear a fairly limited part of this literature. Much of this repertoire blends western European classical music traditions and native folk music traditions. One example of such a Latin American vocal work that is well-known in the United States is Alberto Ginastera's frequently performed song set from 1943, Cinco canciones populares argentinas. However, another lesser-known, earlier work, Cinco canciones argenti… more
Date: August 2018
Creator: Abe, Shoko
Partner: UNT Libraries
open access

Three Essays on Regulatory Focus, Consumer Creativity, and Co-Creation

Description: Co-creation has been conceptualized in a number of ways but is generally referred to as an ongoing partnership between a firm and stakeholders (i.e. consumers) to collaboratively identify and solve mutually beneficial issues. While current scholarship has deepened our knowledge about the process of including consumers in the co-production of value, much remains to be learned. This is particularly true with respect to the consumer behavior side of the discipline as it pertains to creativity and … more
Date: August 2018
Creator: Naletelich, Kelly
Partner: UNT Libraries
open access

The Saxophone in China: Historical Performance and Development

Description: The purpose of this document is to chronicle and describe the historical developments of saxophone performance in mainland China. Arguing against other published research, this document presents proof of the uninterrupted, large-scale use of the saxophone from its first introduction into Shanghai's nineteenth century amateur musical societies, continuously through to present day. In order to better describe the performance scene for saxophonists in China, each chapter presents historical and po… more
Date: August 2018
Creator: Pockrus, Jason
Partner: UNT Libraries
open access

A Countertenor Aria Collection Continuum for Studio Training and Performance

Description: An assessment of the standard voice instructor or performer collection of printed music would likely reveal numerous operatic repertoire volumes in anthology format appropriated to the primary four voice categories. However, thorough investigation divulges little in comparable printed material accessible to the countertenor. This scarcity of systemized collections is especially evident in the territory of comprehensive countertenor operatic repertoire. This project fills that present void by cr… more
Date: August 2018
Creator: Stanley, David Thomas
Partner: UNT Libraries
open access

A National Idiom Universally Understood: Brazilian Tradition and Personal Evolution in Osvaldo Lacerda's "Variações e Fuga para quinteto de sopros"

Description: The career of Osvaldo Lacerda (1927-2011) spanned a critical time in the development of Brazilian nationalist music. Though he was an outspoken nationalist composer, he was also influenced by European trends and training. Even within his nationalist compositions, evidence of a shift in style that mirrors the European movements of Modernism and Postmodernism is found in his works. Among his thirty-six chamber works, three are wind quintets, written between 1962 and 1997. Although all three works… more
Date: August 2018
Creator: Leffler, Hannah
Partner: UNT Libraries
open access

Assessing Perception and Attitude of Pianists toward Ergonomically Scaled Piano Keyboards (ESPK): Raising Awareness about ESPK and Evaluating Changes of Attitude through an Educational Survey

Description: As epidemiologic research demonstrates health concerns for hand problems among pianists, scientists are measuring historic piano keyboards and realizing that much of the piano literature was composed for and played on pianos with smaller keys compared to what is used on the modern piano. Having to play this literature on a larger keyboard is especially difficult for small-handed piano students and professionals. Fortunately, smaller keyboards are now available for use with standard pianos - and… more
Date: August 2018
Creator: Son, Youjoo
Partner: UNT Libraries
open access

"World Life"

Description: During this time of interest and uncertainty in immigration, a foreigner seeking an education, home, and career wonders how welcoming America really is. This documentary film focuses on how the organization known as World Life is involved in helping international students in terms of language, accommodation, and religion. It follows an organization that is willing to open up and welcome them into the community.
Date: August 2018
Creator: Ingabire, Cyuzuzo
Partner: UNT Libraries
open access

Retail District Evolution: An Exploration of Retail Structure and Diversity, a Case Study in Denton, Texas

Description: It is well established that national retail chains impact small, single location retail businesses in terms of revenue generation, retail structure, retail type diversity, and location. This study examines the retail structure and diversity of five retail districts in the City of Denton, Texas. The analysis focuses on one central business district (CBD), one traditional retail strip center (University Drive, also known as US HWY 380), one special retail district (Fry Street District), one tradi… more
Date: August 2018
Creator: Bova, Joshua Paul
Partner: UNT Libraries
open access

Getting the College Experience: Exploring the Effect of the Residential Component of the Upward Bound Summer Program

Description: Upward Bound is a federally funded program designed to help low-income and first-generation high school students become college graduates by providing them with academic enrichment, financial aid information, and relevant educational experiences. Many Upward Bound programs throughout the country include a 6-week summer program when participants stay in residence halls on a university campus. The Upward Bound program at the University of North Texas is one such program. The goals of this researc… more
Date: August 2018
Creator: Krehbiel, Riley M
Partner: UNT Libraries
open access

Laser Surface Modification of AZ31B Mg Alloy Bio-Implant Material

Description: Magnesium and its alloys are considered as the potential biomaterials due to their biocompatibility and biodegradable characteristics but suffer from poor corrosion performance. Various surface modification techniques are employed to improve their corrosion resistance. In present case, laser surface melting was carried out on AZ31B Mg alloy with various laser energy densities using a continuous wave ytterbium laser. Effect of laser treatment on phase and microstructure evolution was evaluated b… more
Date: August 2018
Creator: Wu, Tso-chang
Partner: UNT Libraries
open access

The Nature of Cognitive Impairment in Multiple Sclerosis

Description: Cognitive impairment is common in multiple sclerosis (MS), with as many as 70% of patients with MS affected. Individuals with MS who experience cognitive deficits are less likely to be employed, and may have more difficulty performing independent activities of daily living. Most commonly, deficits are observed in processing speed, complex attention, and memory. Because lesion location varies widely among individuals, no clear pattern of cognitive dysfunction in MS has emerged. However, a number… more
Date: August 2018
Creator: Carlew, Anne R.
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

Genomic Island Discovery through Enrichment of Statistical Modeling with Biological Information

Description: Horizontal gene transfer enables acquisition and dissemination of novel traits including antibiotic resistance and virulence among bacteria. Frequently such traits are gained through the acquisition of clusters of functionally related genes, often referred to as genomic islands (GIs). Quantifying horizontal flow of GIs and assessing their contributions to the emergence and evolution of novel metabolic traits in bacterial organisms are central to understanding the evolution of bacteria in genera… more
Date: August 2018
Creator: Jani, Mehul
Partner: UNT Libraries
open access

Infinitely Many Solutions of Semilinear Equations on Exterior Domains

Description: We prove the existence and nonexistence of solutions for the semilinear problem ∆u + K(r)f(u) = 0 with various boundary conditions on the exterior of the ball in R^N such that lim r→∞u(r) = 0. Here f : R → R is an odd locally lipschitz non-linear function such that there exists a β > 0 with f < 0 on (0, β), f > 0 on (β, ∞), and K(r) \equiv r^−α for some α > 0.
Date: August 2018
Creator: Joshi, Janak R
Partner: UNT Libraries
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