Digital Commons Network^™

The Relationship Between Auditory Working Memory And Statistical Learning In Infancy, Mckenzie Mullins Sheets

Masters Theses

Although previous research indicates that there is a strong relationship between auditory working memory and language skills in children and adults, no studies have explored this relationship in infancy. Working memory develops shortly before the onset of many language abilities in infancy, including the ability to use statistical information to segment words from speech. To track frequent syllable co-occurrences within a speech stream to locate word boundaries, infants must hold auditory information in their mind as one syllable quickly displaces another. Thus, it seems likely that auditory working memory plays a role in statistical learning. In the current study, I …

Assessing The Effects Of The Spring Hunting Season Start Date On Wild Turkey Seasonal Productivity And Hunter Behavior, Joseph Quehl

Masters Theses

Many states throughout the Southeast have documented declines in wild turkey (Meleagris gallopavo) harvest and estimates of recruitment in poult-per-hen ratios. Wild turkey populations are driven by seasonal productivity, so the decline in these parameters may indicate a decline in the overall population. One hypothesis as to why we are seeing a reduction in productivity and a potential population decline is that the spring hunting season is disrupting the reproductive cycle by harvesting too many males before they have had the opportunity to breed, or by harvesting dominant males and disrupting the social hierarchy of the flock. Our …

Developing A Flexible System For A Friendly Robot To Ease Dementia (Fred) Using Cloud Technologies And Software Design Patterns, Robert James Bray

Masters Theses

In this work, we designed two prototypes for a friendly robot to ease dementia (FRED). This affordable social robot is designed to provide company to older adults with cognitive decline, create reminders for important events and tasks, like taking medication, and providing cognitive stimulus through games. This project combines several cloud technologies including speech-to-text, cloud data storage, and chat generation in order to provide high level interactions with a social robot. Software design patterns were employed in the creation of the software to produce flexible code base that can sustain platform changes easily, including the framework used for the graphical …

The Digital Face Of Airpower: Asymmetry, Artificial Intelligence And Intimate Combat In The Twenty-First Century United States Air Force, Jordan Bolster

Masters Theses

Remotely piloted aircraft (RPA) operators have been at war for over twenty-years using unmanned aerial vehicles to kill combat enemies half-a-world away. Their emotional experiences provide an opportunity to examine intimacy in warfare which can be compared and contrasted with conventional pilots and traditional rifle-bearing ground troops. By comparing and contrasting specific emotions felt across various combat environments and technologies, it is possible to answer the question of whether or not RPA operators are legitimate warriors or legitimated assassins. The implementation of RPA operators in combat zones and the proliferation of unmanned technology on the battlefield open up new questions …

Bioregenerative Dietary Supplementation: Optimizing Brassica Production For Space Travel Through Light Intensity, Photoperiod, And Harvest Methodology, Ethan W. Darby

Masters Theses

Bioregenerative dietary supplementation, a component of bioregenerative life support, will be necessary for the success of future exploration-length space endeavors. Plants, as autotrophic producers of calories, nutrients, and oxygen, will be indispensable in the development of these systems. Previous work has identified leafy greens from the genus Brassica as promising candidates for in-flight production of necessary human nutrients such as vitamins C, B₁, and K₁, in addition to β-carotene, the primary vitamin A precursor in the human diet. These plants also produce lutein and zeaxanthin, two compounds important in protecting the eye from radiation-induced damage, as …

Intergroup Dialogue Facilitation: Learning From Experts, Hannah J. Shinew

Masters Theses

Intergroup dialogue (IGD) is a popular and effective tool for fostering communication between social identity groups and increasing social justice awareness and action. It has been implemented widely at colleges and universities across the United States and has also found a place in community-based interventions. Since the development of IGD, researchers have sought to identify participant outcomes and the factors that affect them. However, there is a dearth of research on the role of the facilitator in this process. Past research examining facilitators has examined only novice facilitators and has focused data collection on post-dialogue reflections. Additionally, there is little …

Variability In Microclimate And Carbon Dynamics In Hardwood Forests Managed With The Irregular Shelterwood Reproduction Method, Melody June Mount

Masters Theses

How do forest edges compare to intact interior forests in terms of carbon dynamics, and how is the microclimate altered through the creation of forest edges? Woody plants and trees can act as a carbon sink by using live and dead tissue to store varying amounts of carbon. However, factors such as age, species, respiration rates, and death alter the amount of carbon sequestered by the forest (Gorte, 2009). Additionally, widespread forest fragmentation has resulted in 20% of forests worldwide being located within 100 meters (m) of a forest edge (Haddad et al., 2015). Despite this fragmentation, current carbon models …

Atomic Cows: The Alamogordo Herd At Oak Ridge, Tennessee, 1945-1965, Annamaria Haden

Masters Theses

This thesis examines the place of cows and agriculture in nuclear fallout research at Oak Ridge, Tennessee. The 1945 Trinity atomic bomb test exposed a herd of grazing Hereford cattle in Alamogordo, New Mexico, to radioactive fallout. The U.S. Army shipped this herd to Oak Ridge which led to the establishment of the University of Tennessee-Atomic Energy Commission Agricultural Research Laboratory (UT-AEC). The UT-AEC laboratory studied the Alamogordo herd until 1964 to understand the long-term effects of radiation. Close research and media following of the Alamogordo herd directly informed humans’ attempts to dominate nuclear power by controlling nature. Scientists and …

Synthesis Of Block Copolymer Additives For Examining Phase Morphology And Improving Mechanical Properties Of Thermoplastics Elastomers., Bishal Upadhyay

Masters Theses

Polystyrene-block-poly(1,4-butaidene)-block-polystyrene (PS-PB-PS) triblock copolymers are one of the most widely studied thermoplastic elastomers (TPEs) due to their ease of synthesis, non-polar nature, and commercial applicability. Like many block copolymers, incompatibility between PS and PB causes these TPEs to undergo microphase segregation. Many studies have examined the mechanical properties of blends of TPEs and PS homopolymer additives. However, there have been few studies focused on understanding the morphology and mechanical properties of blends of TPEs and copolymer additives with different architectures. Herein, I describe the synthesis of linear and graft copolymer additives based on the random copolymers poly(methyl methacrylate-random-cyclohexyl methacrylate) (PrC). …

Exploring Factors Influencing Suicidal Behavior: An Investigation Into Automatic Determinants Of Capability Factors, Matthew A. Russ

Masters Theses

This study investigated the associations between non-suicidal self-injury (NSSI), impulsivity, automatic associations with pain, and their combined impact on self-reported capability. The research hypotheses were tested using a sample of 226 participants (182 women, 40 men, and 4 individuals identifying outside the gender binary) recruited from the Department of Psychology participant pool at the University of Tennessee.

An Implicit Association Test (IAT) was employed to measure automatic associations between pain/relief and good/bad. Three self-report questionnaires were also administered, namely the Inventory of Statements about Self-Injury (ISAS) to assess NSSI history, the Acquired Capability for Self-Harm (ACSS) to measure self-reported capability …

Postmortem Objectification: A Spectacle Of Human Remains In German Museums, Helen Martin

Masters Theses

The net of scientific entitlement is woven from a single thread that extends from German colonialism to present-day exhibits like Körperwelten. The work of physical anthropologists in Germany and the development of the field from the late 1800s offers insight into the creation and continuity of scientific entitlement to the body of individuals deemed to be ‘others’. Museums and their exhibits embody the intentionality of the curators and researchers, and communicate these intentions to the visitors through curation and exhibit design choices. The inclusion of human remains in exhibits should be considered carefully as to be respectful of the individuals, …

Modular Composite Sandwich Structures For Thermal And Structural Retrofitting Of Existing Buildings, Marc Al Ghazal

Masters Theses

Around 40% of global energy consumption and 30% of worldwide carbon dioxide (CO2) emissions are attributed to buildings. Most of this consumption is dedicated to ensuring thermal comfort. The goal of this research was to develop and field validate retrofit solutions to improve the energy efficiency of buildings. Exterior cladding panels were designed and tested to ensure adequate thermal and structural performance. Sandwich panels (glass fibers reinforced polymer (GFRP) skins and polymeric foam cores) were fabricated using the vacuum assisted resin transfer molding (VARTM) process. Extruded polystyrene (XPS) and polyurethane (PU) foams were compared as core materials through a series …

Rebel Legitimacy: A Theory On Battle Intensity, Brooke A. Golden

Masters Theses

Why do some rebel groups experience more intense fighting during civil war than others? This paper examines the relationship between rebel legitimacy and battle intensity. Existing literature has much to say about the various variables that influence battle intensity; however, this paper will incorporate two causal mechanisms of rebel legitimacy that are often overlooked or understudied in the civil war literature that explores battle intensity. The two causal mechanisms are: the number of civilian deaths and the level of rebel governance. This study is unique in the way it challenges our current understanding of battle intensity through these mechanisms. This …

A Robust Agroinfiltration Method, Bryce N. Trull

Masters Theses

Stable transformation of soybean (Glycine max) is a markedly slow and laborious process. Thus, a tool that enables rapid evaluation of genetic elements in planta is critical to advance complex research and genetic engineering in soybean. To that end, a substantially robust agroinfiltration method was innovated in this work. Agroinfiltration is a technique that leverages Agrobacterium-mediated transient transformation to deliver genetic elements to the cells of whole plant tissues, usually leaves. Several factors were found to be relevant to successful soybean leaf agroinfiltration, including genotype, surfactant, developmental stage, and Agrobacterium culture medium. The research represents not only …

A Case Study In Cmos Design Scaling For Analog Applications: The Ringamp Ldo, Steven Corum

Masters Theses

As CMOS process nodes scale to smaller feature sizes, process optimizations are made to achieve improvements in digital circuit performance, such as increasing speed and memory, while decreasing power consumption. Unfortunately for analog design, these optimizations usually come at the expense of poorer transistor performance, such as reduced small signal output resistance and increased channel length modulation. The ring amplifier has been proposed as a digital solution to the analog scaling problem, by configuring digital inverters to function as analog amplifiers through deadzone biasing. As digital inverters naturally scale, the ring amplifier is a promising area of exploration for analog …

Surface Location Error In Robotic Milling: Modeling And Experiments, Richard Henry Swan Jr.

Masters Theses

Robotic milling offers new opportunities for discrete part manufacturing as an alternative to milling using large conventional machine tools. The advantage of industrial robots is their large work volume, configurability, and comparatively low cost. However, robots are significantly less stiff than conventional machine tools, which can lead to poor surface finish, low machining accuracy, and low material removal rates. The purpose of this research is to predict the geometric errors, or surface location errors, that occur in a robotic mulling tool path, validate these predictions with machining tests, and compensate these errors by tool path modification. Compared with conventional machine …

No Evidence That Reasoned Analysis Impairs The Accuracy Of (Or Confidence In) Sports Forecasts, Andrew Langbehn

Masters Theses

When making decisions, people can either rely on a gut feeling or engage in reasoned analysis to make a choice. Past research has made competing claims on whether relying on gut feelings or reasoned analysis leads to better decisions. However, these competing claims may be due to the types of decisions being made. Relying on gut feelings has been demonstrated to be superior in judgments about attitudes and leads to greater post-decision satisfaction. However, prior research demonstrating the benefits of gut feelings has used subjective and mostly unverifiable criteria for which to judge the quality of a decision. On the …

The Impact Of Utilitarian Product Reviews On Brand Perception, Benjamin Libon

Masters Theses

The impact of online reviews on consumer behavior has been increasingly studied as online retail platforms have grown exponentially, and internet research used prior to purchasing products has become more common. However, limited research has examined the impact of those product reviews on the overall perception of the brands selling these products. This study exclusively looked at product reviews for high and low-involvement utilitarian products and analyzed how those reviews affect consumers' perception of a brand. Taking a sample of 301 participants, findings showed that star ratings had a drastic effect on consumers' perception of a brand, associating a low …

If Not Us, Then Who?: Qtbipoc Graduate Researchers’ Experiences Researching Qtbipoc Communities, Vardaan Dua

Masters Theses

Experiences of minority graduate student researchers, specifically graduate student researchers that identify as queer and/or trans and Black, Indigenous, and other People of Color (QTBIPOC) have been largely underrepresented in current scholarship. Utilizing reflexive thematic analysis and semi-structured interviews, in the current study we explored the experiences of 20 QTBIPOC graduate student researchers who conduct QTBIPOC research. Results revealed five thematic patterns, including: (a) recognizing, resisting, and reforming systemic oppression within academia; (b) encountering interpersonal oppression within academic contexts; (c) personal well-being and the role of QTBIPOC research; (d) relations among one’s personal identities and engagement in QTBIPOC research; and …

The Influence Of Ion-Ion Correlations On Conductivity In Concentrated Ionic Systems, Md Dipu Ahmed

Masters Theses

This study delves into the fascinating realm of concentrated ionic systems, such as ionic liquids, superionic materials, organic ionic plastic crystals, and polyelectrolytes, which hold immense potential for energy storage applications. The focus is on understanding the intricate role of ionic correlations in shaping their ionic conductivity behavior. These correlations can either boost or impede conductivity, yet their underlying mechanisms remain elusive. Through extensive investigation of various materials, including ionic liquids with differing anionic masses, pure organic ionic plastic crystals, and doped systems, this research employs advanced techniques like dielectric spectroscopy and innovative momentum conservation models to quantify these correlations. …

Demand For Guided Tours On The Tennessee River., Gessika Lee Guerra

Masters Theses

Knoxville, TN is a major urban center in east Tennessee. Knoxville’s urban planners recognized the need for green space and have installed free greenways and parks within the downtown area over several decades. These attractions are immensely popular and promote urban ecotourism. There is an opportunity to begin or expand guided tour services. This research will analyze the demand and willingness to pay for guided river activities – kayaking and pontoon boating – on the Tennessee River in downtown Knoxville. Primary data were collected by 1000 on site flyers connected to an online survey platform. These data were uploaded into …

The Impacts Of Tilled-In Biodegradable Plastic Mulch On Soil Microbial Communities, Corissa L. Martin

Masters Theses

Plastics mulch films are used in agriculture to help increase crop production by regulating soil water retention and soil temperature while also preventing weed growth. Despite these benefits, plastic mulches have led to higher levels of microplastic pollution as weathering occurs. In response to this issue, biodegradable plastic mulches (BDMs) have been introduced to help reduce plastic pollution as they are designed to be tilled into soil after each growing season to continue degradation. Degradation of these mulch films is dependent on climate and, in some areas, complete degradation can take years. Since some biodegradable plastic mulches are made of …

Social And Cultural Identities Of Mentors And Their Impact On Mentorship Experiences, Temvelo Rejoice Matsebula

Masters Theses

The relationship between social and cultural identities and experiences and how we interpret encounters is vital when looking at mentorship. Early childhood education values the combination of classroom education and field experience for pre-service educators. The ability to be a successful mentor relies on one's ability to reflect on their identity, beliefs, practices, values, and skills. This study sought to explore early childhood mentors' views of their social and cultural identities in relation to their experiences with mentorship by engaging with mentors (n=4) in an interview and through reflective journaling about their experiences. Interviews and journals were transcribed …

Burned But Not Forgotten: Foodways Analysis Of Cooking Spaces From The First Kitchen On Thomas Jefferson’S Monticello Plantation, Peggy Marie Humes

Masters Theses

This thesis research evaluates the macrobotanical assemblage identified in soil samples from contexts collected throughout the South Pavilion kitchen space (44AB089) at Thomas Jefferson’s Monticello plantation in Charlottesville, Virginia. My primary research objectives strive to establish what types of plant remains are represented in soil samples recovered from three stratigraphically assigned temporal periods in this late eighteenth-century kitchen space. As the first kitchen at Monticello, where enslaved cooks prepared meals influenced by African American and French dishes for the Jefferson family until 1809, this site can help better establish an understanding of the cultural foodways and dishes within this time …

Age Impacts Perineuronal Net Density In The Somatosensory Genital Cortex Independently Of Gonadal Steroid Hormones, Ian D. Warren

Masters Theses

A hallmark of pubertal development is the rise in gonadal hormone secretions and the subsequent onset of sexual behavior. The size of the somatosensory genital cortex increases in response to both this rise in gonadal steroid hormones and sexual experience. However, whether specific markers of brain plasticity are similarly impacted by gonadal hormones during puberty is not known. Perineuronal nets (PNNs) are specialized extracellular matrix structures that unsheathe neurons as they mature, and their maturation coincides with the closure of sensitive periods across several sensory systems. PNNs in somatosensory cortex, as an example, respond to experience-dependent plasticity. Although experience-depended changes …

Methods For Decarbonized Aeroengine Combustor Design, Robert T. Prater

Masters Theses

There exists an urgent need to decarbonize the civil transportation sector in order to address global warming concerns and its effects. Alternate and sustainable fuel types for combustion systems must be pursued to mitigate the dependency on fossil fuels for power generation. Possible alternative options for aeroengine combustion and propulsion include batteries or hydrogen fuel for fuel-cells or thermal-powered gas turbines. More specifically, thermal-powered aeroengines with premixed flame regimes can promise ultra-low emissions. Future aeroengine combustors operating in highly swirled premixed mode with hydrogen/air mixtures are central to this paper. Prior to the implementation and design of such systems, premixed …

Establishing And Optimization Of Tissue Culture Work With Erigeron Canadensis, Robert Petursson

Masters Theses

Glyphosate resistance among weed species has been an increasing problem in crop production over the past two decades. Glyphosate resistant Erigeron canadensis (horseweed) has been found on multiple continents and 20 U.S. states. It appears that the resistance is of non-target type, with mechanisms of action that have yet to be elucidated at the gene level. For the first portion of the study, I focused on reproducing the original indirect organogenesis protocol but discovered biotype variability can influence regeneration success. An improved indirect organogenesis method was then developed using the previously published methods that could be used across biotypes. A …

Examining How Parents Respond To Their Infant: The Difference Between Full-Term And Preterm Infants, Rebecca R. Crum

Masters Theses

Preterm infants born with a low birthweight are at risk for developmental delays both physically and cognitively. Research suggests that preterm infants struggle to meet developmental milestones in the same way that their full-term counterparts do, especially when it comes to their language development. This study examined the quantitative (i.e., number of words infants heard, amount of child vocalizations) and qualitative (i.e., contingent responding between infants and caregivers, proportion of infant-directed speech) in three cohorts of infants 1) infants born preterm (8-9-months chronological age; 6-months corrected age; n=6), 2) gestational age-matched full-term infants (~ 6 months chronological age), and 3) …

Using Fiber-Optic Reflectance Spectroscopy (Fors) To Identify Human Decomposition Fluid Characteristics In Plant Leaves And Soil, Anielle Duncan

Masters Theses

Anthropologists may be asked by law enforcement or family members to assist in the search for missing deceased individuals. The search areas are often in harsh, rugged terrain for which some technologies, such as ground penetrating radar, cannot be used. Fiber-optic reflectance spectroscopy (FORS) is a portable instrument that can collect information on plants and soil in the surrounding environment, even in austere environments. This study aimed to test whether FORS could be used to identify decomposition fluid in nearby plants and soil in the visible near-infrared (VNIR) and short-wave infrared (SWIR) spectral regions. Using FORS to analyze the spectral …

Preparation Of The Ej301d, A Deuterated Liquid Organic Scintillation Detector, For Spectroscopy Of Fast And High Energy Neutrons, Albert Du

Masters Theses

The focus of this research is on the preparation of a deuterated organic scintillation detector for fast and high energy neutron spectroscopy. The underlying physics of organic scintillation detectors, the process in which a neutron undergoes interaction with the detector material, as well as the readout and data processing procedure is introduced.

For methodology, a comprehensive setup of an EJ301-D deuterated organic scin- tillation detector is detailed. This includes algorithmic development for three distinct purposes. Firstly, it involves the creation of iterative unfolding algorithms, specif- ically the GRAVEL and Maximum Likelihood Expectation-Maximization (MLEM)

algorithm. The second development is conformal binning …