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Deriving Lifetimes Of Lunar Ejecta Constituents: A Model For Lunar Erosion Regolith Overturn, Cole Nypaver
Deriving Lifetimes Of Lunar Ejecta Constituents: A Model For Lunar Erosion Regolith Overturn, Cole Nypaver
Masters Theses
Recently formed, rough impact ejecta deposits on the Moon are visible in radar and thermal infrared remote sensing data as an optically bright ring or “halo” around the associated impact crater. Over time, however, the rocks and boulders associated with these once-rough ejecta deposits break down into fine-grained regolith due to macroscopic space weathering processes and corresponding remote sensing signatures fade to background noise. In this thesis, I measure the Circular Polarization Ratio (CPR) and Rock Abundance (RA) responses of small (~1.5-2.0 diameter) simple impact craters of varying ages on the lunar mare. The goal of this work was to …
How Rights Claims Expand Carceral State, Narges Zahedipoor
How Rights Claims Expand Carceral State, Narges Zahedipoor
Masters Theses
The production of prison is assumed to be a humane, reformist, and a radical step toward rooting out corporal punishments. Contrary to the common assumption, this study shows how liberal reforms worked actually within the judicial system as a state apparatus to distribute power among all state authorities. Rights, which are supposed to free individuals from state repression and the arbitrary use of power, function in a paradoxical way which can ultimately contribute to the carceral state. This study illustrates, through a genealogical perspective, how liberal rights by their universal characteristics fail to emancipate individuals from state coercion and violence, …
Development Of Fluidic Devices For Use In Transient Absorption Microscopy Towards The Study Of Amphotericin B, Brandon Woitas
Development Of Fluidic Devices For Use In Transient Absorption Microscopy Towards The Study Of Amphotericin B, Brandon Woitas
Masters Theses
Flow cell devices have been used extensively in microscopy. Here, we present a new development of fluidic devices that can be used with high resolution transient absorption microscopy in the observation of ultrafast dynamics of solutions, and most importantly, drug-membrane interactions. The evolution of the flow cell devices will be discussed along with their applications in the study of an antifungal drug, Amphotericin B (AmB). The study of AmB with transient absorption microscopy in solution, living systems, and its recent progress on discovering the underlying mechanism of action label-free will be presented. It is discovered that AmB's interaction with membranes …
The Healing Word: Performative Speech In Anglo-Saxon Medical Texts, Honor Lundt
The Healing Word: Performative Speech In Anglo-Saxon Medical Texts, Honor Lundt
Masters Theses
Among the major Anglo-Saxon medical texts, the Lacnunga is unique. All of these documents display influences as diverse as traditional Christian authorities and the Mediterranean medical experts. However, while its contemporaries often contain tables of contents and display signs of careful editing, the Lacnunga lacks any recognizable structure. This disorganization has lead Cameron to compare the work to a "commonplace" book, one where its scribes could record whatever scraps of medical information passed through their hands. The "potpourri" nature of the text could suggest that it more closely resembles the practice of actual contemporary healers than its better-organized relatives.Also unique …
Nesting And Brooding Ecology Of Eastern Wild Turkey In South-Central Tennessee, Vincent Johnson
Nesting And Brooding Ecology Of Eastern Wild Turkey In South-Central Tennessee, Vincent Johnson
Masters Theses
In recent years there has been growing concern for eastern wild turkey (Meleagris gallapova) populations in the southeast U.S. because of noticeable declines in productivity and harvest. Tennessee has also seen a decrease in turkey harvest in some counties and a decrease in poult-hen ratios during their summer surveys. This study was designed to identify potential cause(s) of the decline in seasonal productivity. We gathered data on reproduction and resource-selection of nesting and brooding hens to better understand what could be causing the decline in seasonal productivity. We used hierarchical conditional logistic regression with matched pairs to compare use versus …
Enzyme-Sensitive Lipid Trigger-Mediated Release Of Payload From Liposomes, Sara Barker
Enzyme-Sensitive Lipid Trigger-Mediated Release Of Payload From Liposomes, Sara Barker
Masters Theses
Esterase enzymes are overexpressed in tumor tissues of certain cancer cell types, and it is this property which makes them interesting candidates as a method of inducing cargo release from liposomes. Esterase-responsive liposomes could be developed that could be exploited to selectively deliver drug cargo to tumor tissues upregulating esterase enzyme. For this purpose, a 1,2-dioleoyl-sn-glycero-3- phosphatidylethanolamine (DOPE) lipid was coupled to a trimethyl lock molecule unit bearing an esterase-sensitive moiety. Upon introduction into an esterase-rich environment, the esterase-sensitive labile moiety would degrade. The activation of the trimethyl lock cyclization is expected to drive the restoration of the non-bilayer properties …
Facedown In The Mainstream: Black Men’S Experience Of Gendered Racism And Resilience In Relation To Collegiate Sense Of Community, Edward Marcellus Garnes
Facedown In The Mainstream: Black Men’S Experience Of Gendered Racism And Resilience In Relation To Collegiate Sense Of Community, Edward Marcellus Garnes
Masters Theses
The primary purpose of this study is to expand the psychological research on gendered racism by examining the negative racial experiences of Black men and their emotional resilience in relation to college satisfaction. A secondary aim is to examine possible difference between Black men who are intercollegiate athletes and non-athletes on the variables of interest (i.e., negative experiences, resilience, and collegiate psychological sense of community). Results support the conclusion that Black men at predominately White institutions PWIs, regardless of whether they participate in collegiate sports, tend to express lower magnitudes of collegiate psychological sense of community.
Assessing The Accuracy Of Decomposition Scoring Methods In Arizona’S Sonoran Desert, Shari G. Ex
Assessing The Accuracy Of Decomposition Scoring Methods In Arizona’S Sonoran Desert, Shari G. Ex
Masters Theses
As the humanitarian crisis at the U.S.–Mexico border continues to worsen, there is a growing need to identify migrants who die in attempts to cross. Part of the identification process includes establishing the postmortem interval (PMI): how much time passed between the individuals’ deaths and when their remains were found. This thesis assessed the accuracy of three PMI assessment methods using four pig models in the Sonoran Desert at Arizona’s border with Mexico during the summer. The scoring method as outlined by Megyesi and colleagues (2005), the pig-specific method by Keough and colleagues (2017), and the currently-developing Geographic Information Systems …
Effects Of Long-Term Use And Incorporation Of Biodegradable Plastic Mulch Films On Soil Microbial Community Structure And Activity, Jose Liquet Y Gonzalez
Effects Of Long-Term Use And Incorporation Of Biodegradable Plastic Mulch Films On Soil Microbial Community Structure And Activity, Jose Liquet Y Gonzalez
Masters Theses
Plastic mulch films have become widely used in agriculture for altering the soil’s microclimate, lowering water-use, suppressing weed growth, and increasing crop production. The most commonly used plastic mulch films are made from low-density polyethylene plastic (PE mulch). However, the disposal of used PE mulch has resulted in an environmental issue as they are not degradable, nor readily recyclable. Using biodegradable-plastic mulch films (BDMs) provides an alternative to PE mulches, as BDMs are made to be soil degradable or compostable. However, in situ film breakdown is unpredictable, and information on how BDMs influence soil health in the long-term is missing; …
Coalesced Cherokee Communities In The Eighteenth Century: A Spatial And Elemental Analyses Of The Ceramic Assemblage At Mialoquo (40mr3), An Overhill Cherokee Town In Monroe County, Tennessee, Christian Allen
Masters Theses
I use the ceramic assemblage from the Mialoquo site, an eighteenth-century Historic Cherokee community (A.D. 1760-1780), to study the social formation of Cherokees from different Cherokee town areas at the site. The assemblage is composed of at least two Historic Cherokee types, the Overhill and Qualla ceramic series. Three methods were used to evaluate the ceramics from the Mialoquo assemblage: morphological, spatial, and elemental. Morphological analyses (namely temper and surface treatment) of these sherds were used to examine ceramic variability of the assemblage. Spatial analyses, using ArcGIS, were used to identify patterns between ceramic series present. Finally, elemental analysis, using …
A Cmos Sub-Threshold W-2w Current Mode Digital-To-Analog Converter, Spencer Raby
A Cmos Sub-Threshold W-2w Current Mode Digital-To-Analog Converter, Spencer Raby
Masters Theses
A sub-threshold digital-to-analog converter (DAC) has been investigated to support an ultra-low power monolithic spectral analysis system based on G m -C biquadratic filter circuits with tunable center frequency and Q. The proposed DAC provides bias current to the G m -C circuits to tune filter characteristics. This thesis describes the DAC and difficulties associated with sub-threshold operation for a current-division based DAC architecture when pA-level resolution is needed. The proposed 12-bit current-mode DAC uses the MOSFET-only W-2W architecture and is designed for a 180-nm CMOS process. The DAC’s full- scale current is 100 nA and least significant bit (LSB) …
Characterizing And Comparing Tristructural-Isotropic Buffer Properties From Agr-1 And Agr-2 Irradiation Experiments, Austin Schumacher
Characterizing And Comparing Tristructural-Isotropic Buffer Properties From Agr-1 And Agr-2 Irradiation Experiments, Austin Schumacher
Masters Theses
The Advanced Gas Reactor Fuel Development and Qualification program is an ongoing effort to build a database on coated particle fuel for the future licensing and qualification of tristructural-isotropic (TRISO) coated particle fuel production in the United States. Several irradiation experiments have been produced throughout the program, were subjected to irradiation testing, and are currently in the process of post-irradiation examination (PIE). During this examination process it has been found that the first two irradiation experiments displayed varying fracture characteristics of primarily the buffer layer that would affect a particle’s ability to retain fission products. This disparity in fracture characteristics …
Solid State Synthesis Of Multicomponent Rare-Earth Oxide Ceramics, Matheus Pianassola
Solid State Synthesis Of Multicomponent Rare-Earth Oxide Ceramics, Matheus Pianassola
Masters Theses
Phase formation in multicomponent rare-earth oxides is determined by a combination of composition, sintering atmosphere, and cooling rate. Polycrystalline ceramics comprising various combinations of Ce, Gd, La, Nd, Pr, Sm, and Y oxides in equiatomic proportions were synthesized by solid-state sintering. The effects of composition (type and number of cations), sintering atmosphere (oxidizing, inert, and reducing), and cooling rate on phase formation were investigated. Single cubic or monoclinic phase compositions were obtained with a slow cooling of 3.3 ºC/min, indicating that rare-earth oxides follow a different phase stabilization process than that of transition metal high-entropy oxides. In an oxidizing atmosphere, …
Temperature Sensitive Behavioral Modeling Of Analog To Digital Converters, William Norton Ii
Temperature Sensitive Behavioral Modeling Of Analog To Digital Converters, William Norton Ii
Masters Theses
Using commercial analog to digital converters (ADCs), especially outside their designed operating temperature range, is inherently risky and device performance inherently uncertain. Current methods of verification rely on expensive, time-consuming characterization procedures. A behavioral model capturing expected device performance, especially one which can be applied without testing, could enable system engineers to quickly downselect components for use within a system. To this end, a behavioral ADC model is described, tested and validated against measured performance.
Stand Dynamics Following Gap Scale Exogenous Disturbance In A Single Cohort Mixed Species Stand In Morgan County, Tennessee, Brian Hughett
Stand Dynamics Following Gap Scale Exogenous Disturbance In A Single Cohort Mixed Species Stand In Morgan County, Tennessee, Brian Hughett
Masters Theses
Southeastern mixed species stands vary greatly in terms of composition, structure, and disturbance. Limited research has been conducted on the successional processes occurring after small scale exogenous disturbance within second growth mixed species forests of the southeast. During the years of 1998-2002, southern pine beetle (Dendroctonus frontalis Zimmerman) populations reached epidemic proportions, affecting forests throughout the southeastern United States. The southern pine beetle outbreak resulted in the mortality of nearly all overstory Pinus strobus on the study area. Due to the low basal area and relatively even distribution of eastern white pine on the study area, numerous single stem canopy …
Genben: A Framework For Benchmarking Genomic Data Analysis Methods On Scalable Systems, Eric Auel
Genben: A Framework For Benchmarking Genomic Data Analysis Methods On Scalable Systems, Eric Auel
Masters Theses
With an ever-increasing number of human DNA sequencing efforts being conducted, the amount of genetic variation data available for research has grown substantially over the past few decades. This data provides scientists with the ability to study various traits of humans and other species. Several data analysis methods can be applied to this genetic variation data, such as allele counting and principal component analysis (PCA). Software libraries like scikit-allel can be used to easily explore these data sets, as it contains many functions that can be directly used on genetic variation data. However, trade-offs often exist when working with unique …
Economic Optimizations Of Phosphoric Acid Byproduct Rare Earth Element Recovery, Thomas Gaetjens
Economic Optimizations Of Phosphoric Acid Byproduct Rare Earth Element Recovery, Thomas Gaetjens
Masters Theses
This research seeks to develop and optimize technology for the recovery of rare earth elements from waste streams originating from phosphoric acid production processes. While the technical viability of such recovery processes has previously been examined, implementation has hinged on the economic viability. The integration of these considerations – a technoeconomic analysis – results in optimized operating conditions and suggests directions for future process design. This analysis ultimately highlights the need for a combination of higher rare earth element prices or development of more efficient technology as prerequisites for the economic viability of such processes.
The Influence Of Mentor Personality Traits And Attachment Style On Youth Mentoring Relationship Quality, Sydney Taylor Younginer
The Influence Of Mentor Personality Traits And Attachment Style On Youth Mentoring Relationship Quality, Sydney Taylor Younginer
Masters Theses
The quality of the relationship between a mentor and mentee is considered an influentialmechanism linking youth mentoring to positive developmental outcomes (Rhodes, 2005). Assuch, it is important to understand the factors that promote the development of a high-qualityyouth mentoring relationship in order to maximize youth outcomes. Previous literature notesthat personality characteristics and attachment style influence the quality of dyadic relationships(Asendorpf & Wilpers, 1998; Noftle & Shaver, 2006). The present study sought to examinewhether dimensions of mentor personality and attachment style influenced the quality of theyouth mentoring relationship. This study also examined whether mentor attachment stylemoderated the relationship between mentor personality …
Investigating The Functions Of The Plant-Associated Genus Variovorax In The Populus Rhizosphere, Jennifer Ann Childers
Investigating The Functions Of The Plant-Associated Genus Variovorax In The Populus Rhizosphere, Jennifer Ann Childers
Masters Theses
Plants host a diverse microbial community living in close association with their roots (rhizosphere) or inside plant tissues (endosphere) that can form beneficial, pathogenic, or neutral relationships. Understanding these relationships can inform strategies for manipulating the microbiome of plants to promote plant growth and productivity. Among the microbes isolated and sequenced from the Populus rhizosphere and endosphere are a number of Variovorax isolates. Variovorax ssp. are motile, Gram-negative bacteria that belong to the family Comamonadaceae and are known for their diverse metabolism. For this work, we characterized thirteen new Populus-associated Variovorax strains, twelve of which were isolated from the endosphere …
Saudade For String Quartet, Dennis Patrick Belisle
Saudade For String Quartet, Dennis Patrick Belisle
Masters Theses
Saudade is a four-movement work for string quartet with a performance time of approximately 20 minutes. Initially an untitled, single-movement work, it began as an exercise in idiomatic string composition in a quartet setting. After listening to the piece, my wife, Julie, suggested the title Saudade. The word is of Portuguese origin and, although an English translation of the word does not exist, is defined as a deep emotional state of nostalgic or profound melancholic longing for an absent something or someone that one loves. The idea of a narrative based on different forms of longing became the focus in …
A Robust Hierarchical Dispatch Scheme For Active Distribution Networks Considering Home Thermal Flexibility, Cody Rooks
A Robust Hierarchical Dispatch Scheme For Active Distribution Networks Considering Home Thermal Flexibility, Cody Rooks
Masters Theses
Distribution networks are changing from passive absorbers of electric energy to active distribution networks (ADN) capable of operating and participating in electricity markets. In the context of residential microgrids, which is a type of ADN, aggregated home heating, ventilation and air-conditioning (HVAC) loads present a key opportunity to drive operational and economic objectives, facilitate high renewable energy penetration, and enhance both system resiliency and flexibility. A robust, hierarchical dispatch scheme is developed and presented in this paper, which connects an upper level multi-phase distribution optimal power flow (DOPF) to a lower level model predictive control-based (MPC) HVAC fleet controller. The …
Transport Code Simulations For Shielded Special Nuclear Material Discrimination, Gregory P. Rouleau
Transport Code Simulations For Shielded Special Nuclear Material Discrimination, Gregory P. Rouleau
Masters Theses
Every year, millions of containers of cargo enter the United States. Radiation portal monitors based on passive emissions are used to determine if radiological threats are present. Special Nuclear Materials (SNM), which refers to certain uranium and plutonium isotopes, are of particular interest. Since even moderate shielding can prevent passive detection thereof, this thesis investigates use of an X-ray based active interrogation as an alternative. Active interrogation works by exposing the cargo container to a high energy beam which then induces gamma and neutron emissions from SNM that can be detected. Complicating matters, benign materials like lead and tungsten also …
Deep Reinforcement Learning For Real-Time Residential Hvac Control, Evan Mckee
Deep Reinforcement Learning For Real-Time Residential Hvac Control, Evan Mckee
Masters Theses
The model-free Deep Reinforcement Learning (DRL) environment developed for this work attempts to minimize energy cost during residential heating, ventilation, and air conditioning (HVAC) operation. The HVAC load associated with heating and cooling is an ideal candidate for price optimization through automation for two reasons: Its power footprint in a typical home is sizeable, and the required level of participation from an inhabitant is passive. HVAC is difficult to accurately model and unique for every home, so online machine learning is used to allow for real-time readjustment in performance. Energy cost for the cooling unit shown in this work is …
Campylobacter Infection Of Young Children In A Latin American Middle-Income Country And Its Impact On The Gastrointestinal Environment, Jessica Tweedie
Campylobacter Infection Of Young Children In A Latin American Middle-Income Country And Its Impact On The Gastrointestinal Environment, Jessica Tweedie
Masters Theses
Campylobacter infections are the leading bacterial cause of diarrhea worldwide with potentially profound impacts on pediatric patients in the developing world. It is still unclear how Campylobacter impacts human hosts, though it is becoming increasingly evident that Campylobacters infection’s impact is a multifactorial process that depends on the host immune response, the gastrointestinal microbiota, various bacterial derived metabolites, and possibly the nutritional status of the host. Since these factors likely differ between human-host and bacteria in the developed and developing worlds, it is important that studies comprehensively define these attributes in well characterized clinical cohorts in both settings. In this …
The Effects Of Bdnf Knockdown On Neuroinflammation In The Male And Female Rat Brain, Katheryn Burford
The Effects Of Bdnf Knockdown On Neuroinflammation In The Male And Female Rat Brain, Katheryn Burford
Masters Theses
Since Brain-Derived Neurotrophic Factor’s (BDNF) discovery in 1982, we know that it plays a critical role in both cell survival and cell death within the central nervous system (CNS). It has been established that BDNF, serves as a regulatory body in the CNS, from development to adulthood by promoting neuronal health, survival, and maintenance. However, little is known about BDNF’s role in the pathogenesis of neurological, neurodegenerative, and neuropsychiatric disorders. Therefore, in this study, we used western blots analysis, to examine the effects of global BDNF knockdown on the protein expression of multiple inflammasome and glial cell markers in healthy …
A Study Of Database Migration: Understanding The User Experience, Scott Eugene Shumate
A Study Of Database Migration: Understanding The User Experience, Scott Eugene Shumate
Masters Theses
This thesis reports on a participatory field study of a database migration project. The purpose of the study is to understand the user experiences in the database migration. Both the field observations during the process and the post-migration user interviews provided valuable data to gain insight into what challenges the users faced and how they adapted to the new database. The findings suggest that the users were generally positive about the new database, although they were still not entirely confident about the system’s outputs or certain functions. They developed strategies to ensure data accuracy: keeping paper archives to check outputs …
Current Sensor For Wide Bandgap Devices Dynamic Characterization, Wen Zhang
Current Sensor For Wide Bandgap Devices Dynamic Characterization, Wen Zhang
Masters Theses
High bandwidth sensors are required to measure the wide-bandgap devices' transient behavior because of their very fast switching speed. In addition to high bandwidth, the current sensor must alsointroduce little disturbance to the switching power loop. Specifically, excessive parasitic inductance introduced by the current sensor drastically changes the switching behavior, making the measurement result invalid.Conventional high bandwidth current sensors are first reviewed to understand their limitations. By combining the structure of coaxial shunt resistor and alumina substrate of surface mount thin film resistors, a novel current sensor surface mount coaxial shunt resistor (SMDCSR) is introduced. Its performance is then modeled …
Entry-Level Instruction: High-Frequency Vocabulary And Classroom Interaction In German Textbooks, Andrew Graves
Entry-Level Instruction: High-Frequency Vocabulary And Classroom Interaction In German Textbooks, Andrew Graves
Masters Theses
In elementary second language teaching, it can be difficult to decide which language materials to cover. Drawing from the insights of High-Frequency Vocabulary, Classroom Interaction, and teaching methodologies such as Communicative Language Teaching and CREED, I wish to suggest moving toward criteria for elementary language teaching that takes into account the current research as it relates to high-frequency vocabulary, the development of communicative skills in face-to-face interaction, and the more common customs of interaction as informed by the field of pragmatics. My main argument is that we should move toward writing textbooks which emphasize high-frequency terms which are relevant to …
Improving Manufacturing Data Quality With Data Fusion And Advanced Algorithms For Improved Total Data Quality Management, David Juriga
Improving Manufacturing Data Quality With Data Fusion And Advanced Algorithms For Improved Total Data Quality Management, David Juriga
Masters Theses
Data mining and predictive analytics in the sustainable-biomaterials industries is currently not feasible given the lack of organization and management of the database structures. The advent of artificial intelligence, data mining, robotics, etc., has become a standard for successful business endeavors and is known as the ‘Fourth Industrial Revolution’ or ‘Industry 4.0’ in Europe. Data quality improvement through real-time multi-layer data fusion across interconnected networks and statistical quality assessment may improve the usefulness of databases maintained by these industries. Relational databases with a high degree of quality may be the gateway for predictive modeling and enhanced business analytics. Data quality …
Atmospheric Entry Performance Of The Hercules Single-Stage Reusable Vehicle At Earth, Braxton Lott Brakefield
Atmospheric Entry Performance Of The Hercules Single-Stage Reusable Vehicle At Earth, Braxton Lott Brakefield
Masters Theses
The Hercules Single-Stage Reusable Vehicle (HSRV) is an innovative rocket that has been designed for use at Mars. However, with the renewed focus on returning to the moon first, it has been proposed to use the Hercules design for missions in the Earth-Moon system. To test its reentry performance, 9 types of entries were simulated, with multiple sensitivity cases for each. Overall, the current design of the vehicle is able to return to Earth safely for a wide range of different entry conditions, but some improvements could be made to optimize the vehicle for Earth operations.