Digital Commons Network^™

Exploring Meerwein-Ponndorf-Verley Reactions Using Metal Organic Framework Catalysts., Yuehan Zhou

Electronic Theses and Dissertations

The Meerwein–Ponndorf–Verley (MPV) reaction is a reaction that is used to reduce aldehydes and ketones to the corresponding alcohols with the added use of catalysts. The common metal triflate catalysts used in MPV reduction incur tremendous environmental hazards and high operational costs. The use of Metal-Organic Frameworks (MOFs) as catalysts can be an alternative due to MOFs’ extraordinarily high surface areas, ultrahigh porosities, tunable pore sizes, modifiable internal surfaces, and numerous framework structures. Moreover, using MOFs as catalysts for MPV hydrogenation is economically viable due to low operational and material costs. This study involves using MOF-808 (Hf) in the MPV …

Flight Trajectory Prediction For Aeronautical Communications., Nathan T Schimpf

Electronic Theses and Dissertations

The development of future technologies for the National Airspace System (NAS) will be reliant on a new communications infrastructure capable of managing a limited spectrum among aircraft and ground systems. Emerging approaches to this spectrum allocation task mostly consider machine learning techniques reliant on aircraft and Air Traffic Control (ATC) sector data. Much of this data, however, is not directly available. This thesis considers the development of two such data products: the 4D trajectory (latitude, longitude, altitude, and time) of aircraft, and the anticipated airspace utilization and communication demand within an ATC sector. Data predictions are treated as a time …

Refinement And Automation Using Algorithmic Control Of Breathforce, A Respiratory Training System For Patients With Spinal Cord Injuries., Anna Goestenkors

Electronic Theses and Dissertations

Spinal cord injuries (SCI) can lead to impaired respiratory and cardiovascular function and a general decrease in lung compliance. This can complicate breathing as well as impair the ability to sigh, cough, and clear secretions, leading to increased risk of respiratory infections. Respiratory training has been shown to combat these effects. BreathForce is under active development to create a user-centric inspiratory-expiratory device that is an affordable option for at-home training. This study reports on the refinement of valve design and automation incorporated into BreathForce to enhance and enforce clinical practices and processes as part of the respiratory training protocol used …

Electrical Characterization Of Phytoplankton Suspensions Using Impedance Spectroscopy., Margaret R Jett

Electronic Theses and Dissertations

Phytoplankton are closely monitored because of their important environmental role, and the impacts they have on their local ecosystems. Some phytoplankton respond to stress by producing lipids, which can be harvested for biofuels and other chemicals. Microfluidic devices have been important in improving the portability and throughput of phytoplankton characterization methods, increasing their potential for in situ use. This study utilized a small sample of phytoplankton suspended in a stagnant medium and measured the impedance response using a lab-on-chip and impedance analyzer. The individual cell characteristics were derived from the impedance response of the group. The goal was to characterize …

Development And Evaluation Of A Body Weight Support Treadmill For Use With Locomotor Training On Pediatric Spinal Cord Injury Patients., Winston T Rauch

Electronic Theses and Dissertations

The consequences of spinal cord injury (SCI) are devastating regardless of the age of a patient. When the injury occurs in children five years old or younger, however, the impact is magnified due to the inevitable development of scoliosis (96%) and hip dysplasia (57%) (Schottler et al., 2012). To reduce occurrence of these complications and improve the quality of life for these patients, specialized activity-based therapies such as locomotor training (LT) are being increasingly used to improve overall trunk control and muscle activity in the lower extremities (Harkema et al., 2012; Howland et al., 2014). The aim of this therapy …

Room Temperature Alkali Treatment Of Rice Straw For Enhanced Enzymatic Hydrolysis., Seth Mains

Electronic Theses and Dissertations

Due to the pollution of fossil fuels due to greenhouse emissions, researchers continue to search for alternative methods that allow for the clean production of energy, fuels, and polymer fibers. A method currently under investigation is the use of lignocellulosic biomass as a solution to current problems with energy and polymer fiber production. Through the process of pretreatment, possibilities for lignocellulosic biomass expand due to improved accessibility of the cellulose and hemicellulose which can be broken down via enzymatic hydrolysis into C5 and C6 sugars such as xylose and glucose. This study investigated the fermentation of the rice straw into …

Conversion Of Multicellds Digital Snapshots To Isa-Tab Format., Corey P. Chitwood

Electronic Theses and Dissertations

The MultiCellular Data Standard (MultiCellDS) is an interdisciplinary effort to create a data standard for sharing multicellular experimental, simulation, and clinical data. The ultimate goal of the overall project is to allow for data sharing that will lead to better analyses and simulations for multicellular biology and predictive medicine in association with the PhysiCell, a software that allows for simulations of large numbers of cells in 3D tissues. Digital cell lines are files that contain a standardized representation of a biological cell line and include phenotypic parameters as well as microenvironmental conditions for use in simulations. A Digital Cell Line …

Wetting And Drying Dynamics For Tio2 With Pbs Quantum Dots., Kelly M. Lee

Electronic Theses and Dissertations

Initial solar cells utilized silicon and alloys for their economic viability. Photoelectrochemical photovoltaic cells were discovered with technological advancement which increased solar efficiency and further improved economic feasibility leading to quantum dot sensitized solar cells. Lead sulfide quantum dots and titanium dioxide were studied for wetting and drying effects. Zeta potential, pH values, SEM, and optical microscopes quantified or observed the colloidal suspension and dried sample behavior. Combined mixtures of lead sulfide and titania were dried at 3.6 pH and 12.56 pH values. This due to the observed zeta potential isoelectric point of titania, and behavior showed increased stability occurring …

The Study Of Copper Corrosion Mechanisms Using Electrochemical Experimental Techniques., Evan Grimm

Electronic Theses and Dissertations

The purpose of this study was to discover and thoroughly explain the corrosion mechanisms of copper in saltwater, tap water and deionized water, and to apply these methods and findings when testing the corrosion mechanisms of other materials. The experimental procedure consisted of measuring the open circuit potential, electrochemical impedance spectroscopy, linear sweep voltammetry, and Tafel analysis.

The copper was found to corrode at a greater rate in saltwater, followed by tap water then deionized water, with a larger difference between saltwater and tap water than between tap water and deionized water. Each reaction was found to be both kinetically …

Machine Learning Models For Lodi Indices., Lucas A. Bruns

Electronic Theses and Dissertations

Two indices published monthly by the Logistics and Distribution Institute (LoDI) predict changes in logistics and distribution activity levels nationally and regionally and are useful for organizations when planning projects and expenses. This research validates the current linear regression model, updates the index conversion method, and introduces machine learning models.

New source data are introduced to the models to validate the current linear regression model and a comparative analysis verifies that the current source data are robust. A rolling average is used for index conversion in place of a fixed reference month to reflect recent changes in employment levels.

Three …

Modified Electrode Surfaces With Hydrogen Evolution Reaction Catalysts Derived From Electropolymerized Complexes With Redox Active Ligands., Amanda Mae Arts

Electronic Theses and Dissertations

The demand for energy is growing exponentially, and to keep up with these demands new technologies for renewable energy have received increased attention. Hydrogen is one of the most promising energy sources for the future and plays a vital role in water electrolysis and fuel cells, as the hydrogen evolution reaction (HER) is the main step in the water splitting process. To increase the reaction rate and improve efficiency for the water electrolysis, catalysts are used to minimize the overpotential.

Most of the current electrocatalysts for HER are heterogeneous in nature and are dominated by platinum and other precious metals …

Develop A Multi-Functional Green Pervious Concrete (Mgpc) Pavement With Polycyclic Aromatic Hydrocarbons (Pahs) Removal Function., Hong Shang

Electronic Theses and Dissertations

Stormwater runoff induced Polycyclic Aromatic Hydrocarbons (PAHs) contaminant increasingly imperils the groundwater quality and the sustainable development of human society due to the potential carcinogenic risks. Pavement can be considered as the first line of defense for contaminant removal of the stormwater runoff. New construction materials with stormwater runoff quantity and quality control are in urgent demand for updating the existing pavement system. An innovative material called Multi-functional Green Pervious Concrete (MGPC) was developed in the department of Civil and Environmental Engineering at University of Louisville. This material uses organoclay as the amendment to enhance the PAHs removal capacity of …

Exploring Opportunities For Prevention Of Child Sexual Abuse In A Diverse American Muslim Community., Rishtya Meena Kakar

Electronic Theses and Dissertations

Recognizing the significant mental, emotional, developmental and health consequences for victims of child sexual abuse (CSA) and sociopolitical consequences for families and communities in every cultural, ethnic, and religious group around the world, this study sought to determine key opportunities for prevention of CSA in a diverse American Muslim community using a public health socioecological lens, rooted in aspects of critical theory. While there is considerable research on situational and individual-level risk factors related to CSA cases, there is less research on the societal and community-level processes related to the primary prevention of CSA, especially among minoritized communities. Responding to …

Leadership Qualities Of Female Presidents Serving The Tennessee Colleges Of Applied Technology System, Kelli Kea-Carroll

Electronic Theses and Dissertations

The purpose of this qualitative, phenomenological study was to examine the leadership styles and characteristics of leadership of 11 female presidents in the Tennessee Colleges of Applied Technology system. The administrators’ perceptions of successful leadership, desirable outcomes of institutional leadership, and improvements resulting from perceived successful leadership styles that guided each participant’s work as a technical college president were examined. Using the research questions guiding this study, data were collected from individual, in-depth interviews with each female, technical college president. The analysis of the interviews identified the leadership styles of democratic, situational and participative as being the most common among …

Tobacco Cessation Counseling Practices Amongst Dental Hygienists In Central Texas, Lacy Murray

Electronic Theses and Dissertations

Although tobacco cessation is an uphill battle for almost everyone who attempts to quit, it is important that dental hygienists do not assume that patients are not interested. Dental hygienists are in an ideal position to offer cessation help to their tobacco using patients. The purpose of this study was to gain a better understanding of the tobacco cessation practices among central Texas dental hygienists. Specifically, dental hygienists were asked about beliefs, motivation, and confidence with regard to their tobacco cessation practice. A positive significant, moderate, relationship was found between beliefs and confidence (r=0.647), beliefs and practices ( …

Spatial Analyses Of Gray Fossil Site Vertebrate Remains: Implications For Depositional Setting And Site Formation Processes, David Carney

Electronic Theses and Dissertations

This project uses exploratory 3D geospatial analyses to assess the taphonomy of the Gray Fossil Site (GFS). During the Pliocene, the GFS was a forested, inundated sinkhole that accumulated biological materials between 4.9-4.5 mya. This deposit contains fossils exhibiting different preservation modes: from low energy lacustrine settings to high energy colluvial deposits. All macro-paleontological materials have been mapped in situ using survey-grade instrumentation. Vertebrate skeletal material from the site is well-preserved, but the degree of skeletal articulation varies spatially within the deposit. This analysis uses geographic information systems (GIS) to analyze the distribution of mapped specimens at different spatial scales. …

Perceptions Of Occupationally Trained Technical College Faculty On Their Preparedness To Teach And On The Need For Professional Development: A Phenomenological Study, Brandon Hudson

Electronic Theses and Dissertations

This qualitative, phenomenological study examines the perceptions of occupationally trained Tennessee technical college faculty on their preparedness to teach after being hired directly from industry and on the need for professional development and training on instructional and classroom strategies. Twelve semi-structured interviews were conducted by Zoom with instructors from three technical college program areas, Industrial Maintenance, Machine Tool Technology, and Welding. Participants represented institutions from each grand division of Tennessee, West, Middle, and East, plus Upper East. As a result of the data analysis, common themes, including a “here are your keys” approach to instructor induction, a reliance on other …

Tennessee's Voluntary Prekindergarten (Vpk) Program And Kindergarten Achievement, Kindetta L. Thompson

Electronic Theses and Dissertations

The purpose of this quantitative study was to investigate whether there is a relationship between Tennessee's Voluntary Prekindergarten (VPK) program and kindergarten achievement. I compared the academic growth of who attended a VPK program to students in Title 1 schools who did not attend a VPK program. Kindergarten gives the first easyCBM assessment in the second semester of school. I compared the easyCBM scores of the students who attended a VPK program to the ones who did not attend a VPK program. This could reveal if attending the VPK program is related to the students’ academic growth and the amount …

Adverse Childhood Experiences (Aces): Assessing Their Impact On Mental Health Outcomes Among Us Children And The Mitigating Role Of Resilience, Glory Okwori

Electronic Theses and Dissertations

ACEs are traumatic life events occurring during childhood that can have negative effects. Common mental disorders that are diagnosed in childhood are attention-deficit/hyperactivity disorder (ADHD), behavior disorders, anxiety and depression. The associations between ACEs and such problems in children have not been significantly examined. There are protective factors that can help reduce the effects of exposure to ACEs that have not been fully explored.

The purpose of this research study was to examine: 1) the prevalence of mental health outcomes in children; 2) the associations between ACEs, resilience and mental health outcomes; and 3) the role of resiliency as a …

Corporate Social Advocacy On The Blm Movement: A Content Analysis Of Corporate Responses Via Instagram, Oromidayo Racheal Tunji-Ajayi

Electronic Theses and Dissertations

Black Lives Matter (BLM) has been a concern in the US since 2013, thereby becoming an increasing interest. Several US corporations’ attention has been drawn to BLM due to its radical strategy on social media to facilitate engagements. Research shows that a company's engagement in activism by taking a stance on socio-political issues often records growth. Also, scholars have focused on corporate responses to BLM through the lenses of the implications or intentions of the brand’s engagement. This study, however, analyzes 236 corporate Instagram BLM posts through the lenses of the attributes of their responses. It is assumed that brand …

Examining Predictors Of Attitudes And Knowledge Of Registered Nurses And Nursing Students In Tennessee Toward Pregnant And Perinatal Women With A Substance Use Disorder, Jessica Patrylo

Electronic Theses and Dissertations

Substance use disorders (SUDs) among pregnant and perinatal women continue to be a national public health crisis. Furthermore, nursing students and perinatal nurses have historically negative and punitive attitudes toward this vulnerable population of women. As nurses are primary care providers for pregnant and perinatal women, this is troublesome as perinatal patients express feeling stigmatized by nurses whom they should be able to trust. This contributes to the reluctance of women to seek needed medical and prenatal care. Tennessee was the first state to criminalize drug use in pregnancy and has higher neonatal abstinence syndrome (NAS) rates, which were more …

Missed Nursing Care: Accounting For Education, Experience, And Job Satisfaction In Registered Nurses, Jessica Bechard

Electronic Theses and Dissertations

Aim. The aim of this study was to examine missed nursing care in the context of academic preparedness, years of experience, and job satisfaction and determine predictors of missed nursing care.

Background. Patient care that is omitted or delayed is known as missed nursing care. Failure to provide the necessary care interventions on time can lead to decreased patient outcomes. Academic preparation, the number of years of nursing experience, and job satisfaction can also play a pivotal role in patient outcomes. Limited studies have assessed academic preparedness and years of nursing experience on missed nursing care while also …

The Impact Of Natural Playscapes On Toddler Play, Laura J. Pearce

Electronic Theses and Dissertations

A distinct lack of data related to the impact of natural environments on children birth to age 3 was identified by a thematic review of the existing literature. With this in mind, the researcher designed a limited scope quantitative study to explore the potential for extending the existing body of research to include this younger age. The study used a time sampling method to code behaviors that occurred in videos collected of children from 12 to 35 month who were playing on the playground at their childcare facility. The playscapes were classified as naturalistic or manufactured. The data was then …

Nitrogen-Doped Carbon Fiber Ultramicroelectrodes As Electrochemical Sensors For Detection Of Hydrogen Peroxide, Eric Wornyo

Electronic Theses and Dissertations

Carbon fiber ultramicroelectrodes (CF-UMEs) are commonly used as electrochemical probes and sensors due to their small size, fast response, and high signal-to-noise ratio. Surface modification strategies are often employed on CF-UMEs to improve their selectivity and sensitivity for desired applications. However, many modification methods are cumbersome and require expensive equipment. In this study, a simple approach known as soft nitriding is used to prepare nitrogen-doped CF-UMEs (N-CF-UMEs). Nitrogen groups introduced via soft nitriding act as electrocatalytic sites for the breakage of O-O bonds during the reduction of peroxides like H₂O₂, a common target of biosensing strategies. …

Economic Insecurity, Poverty, And Parental Alcohol Misuse, Joey Tucciarone

Electronic Theses and Dissertations

Because parental alcohol misuse is associated with numerous negative outcomes for drinkers and other family members, it is important to examine factors predictive of alcohol misuse patterns among parents living with at least one child under the age of 18. Two possible factors include economic insecurity and poverty. This study sought to address whether measures of economic insecurity (i.e., housing and/or food insecurity in the past 12 months) and a dichotomous measure of poverty predict parental binge drinking and parental heavy alcohol consumption in a large population-based sample. It was hypothesized that economic insecurity and poverty, analyzed separately, would predict …

Using An Inventory Of Unstable Slopes To Prioritize Probabilistic Rockfall Modeling And Acid Base Accounting In Great Smoky Mountains National Park, Thomas A. O'Shea

Electronic Theses and Dissertations

An inventory of unstable slopes along transportation corridors and performance modeling are important components of geotechnical asset management in Great Smoky Mountains National Park (GRSM). Hazards and risk were assessed for 285 unstable slopes along 151 miles of roadway. A multi-criteria model was created to select fourteen sites for two-dimensional probabilistic rockfall simulations and Acid Base Accounting (ABA) tests. Simulations indicate that rock material would likely enter the roadway at all fourteen sites. ABA test results indicate that influence of significant acid-producing potential is generally confined to slaty rocks of the Anakeesta Formation and graphitic schist of the Wehutty Formation. …

Implementing Of Phase Potentiation Program With College Triathletes, David Fish

Electronic Theses and Dissertations

The purpose of this study is to determine the effectiveness of an in-season resistance training program on improving measures of strength in female collegiate triathletes. Nine females (age = 19.2 ± 1.1 years, height = 166.5 ± 12.5 cm, body mass = 61.1 ± 9 kg) with limited resistance training experience were examined for this study. Formal RT intervention was monitored for 7 weeks with the athletes being assigned 6 weeks of independent RT prior to the pre-test. Athletes completed a standardized athlete monitoring program pre and post resistance training intervention. Paired sample t-tests were used to determine differences …

Bilateral Ground Reaction Force Jumping Asymmetry And Performance, Keith Painter

Electronic Theses and Dissertations

The prevalence of asymmetry in performance research has increased in recent years with mixed results. Much of the performance research has focused on unilateral jumping activities attempting to show relationships to other performance variables. However, bilateral ground reaction forces (bGRF) from jumps are more frequently assessed in athlete monitoring programs and the asymmetry from those jumps could be a simple addition to data already being collected. Research into bGRF asymmetries is lacking and no studies have addressed longitudinal changes. Additionally, research into the relationship of asymmetries to performance have infrequently used athletes. For these reasons, this dissertation will focus on …

Manifold Learning With Tensorial Network Laplacians, Scott Sanders

Electronic Theses and Dissertations

The interdisciplinary field of machine learning studies algorithms in which functionality is dependent on data sets. This data is often treated as a matrix, and a variety of mathematical methods have been developed to glean information from this data structure such as matrix decomposition. The Laplacian matrix, for example, is commonly used to reconstruct networks, and the eigenpairs of this matrix are used in matrix decomposition. Moreover, concepts such as SVD matrix factorization are closely connected to manifold learning, a subfield of machine learning that assumes the observed data lie on a low-dimensional manifold embedded in a higher-dimensional space. Since …

The Relationship Between Yo-Yo Intermittent Recovery Testing Ability And 20-Meter Sprint Times In Ncaa Division I Men’S And Women’S Collegiate Soccer Players, Fiona Dodge

Electronic Theses and Dissertations

The purpose of this study was to determine the relationship between Yo-Yo intermittent recovery testing ability and 20-meter sprint times in NCAA Division I men’s and women’s collegiate soccer players. Results show no significant (p = >0.05) relationship between the distance covered in the Yo-Yo IR1 test and 20-meter sprint times in the female players and a significant correlation between the two tests in the male players (r = -0.33). A non-significant relationship between the tests in female players may be due to greater variation in the total distance covered during the Yo-Yo IR1 test and small variation …