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Can Attachment Style And Temperament Predict Personality Organization?, Connor Logan Smith Dec 2018

Can Attachment Style And Temperament Predict Personality Organization?, Connor Logan Smith

Masters Theses

Otto Kernberg (1967) developed a psychoanalytic theory of personality organization in which he posited that all individuals operate on one of three levels of personality organization: neurotic, borderline, or psychotic. His theory was developmental in nature and based on the idea that our earliest experiences establish unconscious interpersonal patterns that persist throughout life.The current study examined whether attachment style (anxious or avoidant) and factors of temperament (negative affect, effortful control) would predict personality organization. In particular, we examined identity diffusion and use of primitive defenses as markers of personality functioning. Results revealed that anxious attachment, negative affect, and effortful control …


I Am Because You Are: Other Group Members' Attachment Avoidance And Individual Experiences Of Negative Affect In Intergroup Dialogue, Elliott Nolan Devore Dec 2018

I Am Because You Are: Other Group Members' Attachment Avoidance And Individual Experiences Of Negative Affect In Intergroup Dialogue, Elliott Nolan Devore

Masters Theses

We investigated the relationships between attachment style and session-level process and outcome variables (i.e., group members’ perceptions of group climate, session depth and smoothness, and positive and negative affect) among 94 participants in 17 intergroup dialogues (IGD). Each participant completed an measure of adult attachment style prior to the first IGD, and measures of group climate, session depth and smoothness, and positive and negative affect following each session. We used the actor-partner interdependence model (Kenny, Mannetti, Pierro, Livi & Kashy, 2002) to examine relationships between actor (i.e., an individual group member’s attachment) and partner (i.e., the attachment scores for the …


Prisoners Present Arms: Sectarian Christians And The American Carceral State During The First World War, Joshua Ward Jeffery Dec 2018

Prisoners Present Arms: Sectarian Christians And The American Carceral State During The First World War, Joshua Ward Jeffery

Masters Theses

This thesis investigates the prison experiences of Arthur Dunham, Harold Gray, Evan Thomas, and other conscientious objectors to the First World War. It demonstrates that the Federal government of the United States used scientific management techniques, including the initiation of a discourse of 100% Americanism, the use of propaganda to spread this discourse, and the use of this discourse to encourage Americans to keep their friends, neighbors, and relatives under surveillance. These techniques were used together in order to create an American "carceral state" that allowed the government to surveil and discipline its population in such a way as to …


Remote Characterization Of Physical Surface Characteristics Of Mars Using Diurnal Variations In Apparent Thermal Inertia, Cameron Blake Mccarty Dec 2018

Remote Characterization Of Physical Surface Characteristics Of Mars Using Diurnal Variations In Apparent Thermal Inertia, Cameron Blake Mccarty

Masters Theses

Analysis of the Martian surface today can provide insight into the processes that may have affected it over its history. Information about the physical surface characterization of a region can help determine the degree of sorting it has experienced and/or its geologic maturity. Sub-resolved “checkerboard” mixtures of materials with different horizontal thermal inertia mixtures can lead to differences in the apparent thermal inertia values inferred from night and day radiance observations. Standard methods for deriving thermal inertia from orbit via the THermal EMission Imaging System (THEMIS) can give values for the same location that vary by as much as 20% …


Capacity Design Methods For Strongback Braced Frames, Peter C. Talley Dec 2018

Capacity Design Methods For Strongback Braced Frames, Peter C. Talley

Masters Theses

When subjected to strong earthquake ground motions, conventional steel braced frames are vulnerable to soft-story mechanisms, whereby the weakest story accumulates more damage relative to the rest of the structure. This reduces the overall strength of the structure, increases the cost of repairs, and can cause issues during the design process due to the reduced redundancy of the system.One method for mitigating this behavior is the use of an elastic spine frame. These frames combine a stiff vertical “spine”, such as a truss or shear wall, with a more ductile, energy-dissipating system. The spine typically spans the height of the …


Food Security In The United States: A Futures Analysis Via Systems Modeling, Jennifer Lynn Trumbo Dec 2018

Food Security In The United States: A Futures Analysis Via Systems Modeling, Jennifer Lynn Trumbo

Masters Theses

Food insecurity is a pressing issue not only in developing countries, but in communities across the United States (US). Food insecurity is the lack of nutritious, sufficient, accessible, and reliable culturally-appropriate food. At least 42.2 million people across the US face food insecurity. Food insecurity has been associated with institutional barriers, gender, indigeneity, citizenship, human immunodeficiency virus (HIV) status, racialization, and poverty. Further, a lack of sufficient, nutritious food is associated with serious health outcomes. Food insecure populations have higher rates of chronic disease, mental health issues, and obesity. Considering the negative health outcomes associated with food insecurity, and its …


Failure Properties And Phenomena For Zircaloy-4 From Ring Compression Testing, Benton Edward Garrison Dec 2018

Failure Properties And Phenomena For Zircaloy-4 From Ring Compression Testing, Benton Edward Garrison

Masters Theses

An effective method to determine the plastic strain at fracture and investigate the fracture energy of as-received and hydrided unirradiated Zircaloy-4 tubes in the hoop direction at room temperature was developed for ring compression tests through experimental and computational evaluation. The hydrogen content was varied up to 610 weight parts per million so that failure was consistently ductile. A Gurson-based approach for ductile damage was used to model material failure. Experimental test results and computational simulations modeled in Abaqus were integrated to directly determine plastic strain at fracture, and empirical fitting was used to investigate fracture energy. As expected, increasing …


Online Machine Learning Algorithms Review And Comparison In Healthcare, Nikhil Mukund Jagirdar Dec 2018

Online Machine Learning Algorithms Review And Comparison In Healthcare, Nikhil Mukund Jagirdar

Masters Theses

Currently, the healthcare industry uses Big Data for essential patient care information. Electronic Health Records (EHR) store massive data and are continuously updated with information such as laboratory results, medication, and clinical events. There are various methods by which healthcare data is generated and collected, including databases, healthcare websites, mobile applications, wearable technologies, and sensors. The continuous flow of data will improve healthcare service, medical diagnostic research and, ultimately, patient care. Thus, it is important to implement advanced data analysis techniques to obtain more precise prediction results.Machine Learning (ML) has acquired an important place in Big Healthcare Data (BHD). ML …


The Impact Of Shared Attention On Multiple Object Tracking In Competitive And Cooperative Settings, Sydney Blaine Michelson Dec 2018

The Impact Of Shared Attention On Multiple Object Tracking In Competitive And Cooperative Settings, Sydney Blaine Michelson

Masters Theses

Shared attention theory postulates that when simultaneously co-attending to a stimulus with a similar other, cognitive prioritization occurs that has both psychological and behavioral impact, with the ultimate goal of generating collective knowledge. A cooperative scenario occurs when a group’s goal is linked such that one person’s success is also another’s. By contrast, a competitive scenario occurs when a group’s goal is linked such that if one person succeeds, the other fails. The purpose of this thesis was to understand the effect of cooperative and competitive settings on shared attention in a performance domain. I hypothesized that cooperation would moderate …


Tensor Based Monitoring Of Large-Scale Network Traffic, Gerald Liso Dec 2018

Tensor Based Monitoring Of Large-Scale Network Traffic, Gerald Liso

Masters Theses

Network monitoring systems are important for network operators to easily analyze behavioral trends in flow data. As networks become larger and more complex, the data becomes more complex with increased size and more variables. This increase in dimensionality lends itself to tensor-based analysis of network data as tensors are arbitrarily sized multi-dimensional objects. Tensor-based network monitoring methods have been explored in recent years through work at Carnegie Mellon University through their algorithm DenseAlert. DenseAlert identifies events anomalous events in tensors through quick detection of dense sub-tensors in positive-valued tensors. However, from experimentation, DenseAlert fails on larger datasets. Drawing from RED …


Heat Flux Model Validation Utilizing Convolutional Neural Networks And Sub-Surface Thermocouples For Nstx-U, Thomas Patrick Looby Dec 2018

Heat Flux Model Validation Utilizing Convolutional Neural Networks And Sub-Surface Thermocouples For Nstx-U, Thomas Patrick Looby

Masters Theses

A proof of concept convolutional neural network (CNN) has been developed to assist in operating tokamaks outside of existing empirical scalings for the heat flux width, λq [lambda-q]. NSTX-U has designed new plasma facing components (PFCs) to withstand increased halo current forces as well as elevated heat fluxes driven by increased poloidal field and neutral beam power compared to NSTX. Larger graphite tiles are castellated to 2.5 cm [centimenter] x 2.5 cm [centimeter] to reduce bending stresses. Maintaining PFCs below engineering limits will be an important consideration for operation of NSTX-U. Sub-surface thermocouples will be utilized to demonstrate validation …


Uncertainty In The Production Decisions Of Smallholder Broiler Producers In Musanze, Rwanda, Bartholomew Wade Kenner Dec 2018

Uncertainty In The Production Decisions Of Smallholder Broiler Producers In Musanze, Rwanda, Bartholomew Wade Kenner

Masters Theses

Uncertainty is a vital component of decision-making for any business. A project in the district of Musanze in Rwanda introduced new income streams and sources of nutrition for households in the form of smallholder, household broiler operations that produce 100 chickens. Prices and poultry production data were gathered from the operations.This information was used to calibrate a stochastic financial analysis model. By incorporating field data into the model, Monte Carlo simulations were performed based on the market price, input, and production data collected over an eight-month period. Historical price index data and Brownian motion were used to simulate twenty years …


Low-Overhead Migration Of Read-Only And Read-Mostly Data For Adapting Applications To Hybrid Memory Systems, Joseph Townley Teague Dec 2018

Low-Overhead Migration Of Read-Only And Read-Mostly Data For Adapting Applications To Hybrid Memory Systems, Joseph Townley Teague

Masters Theses

Memory systems containing different types of memory with varying capacity, latency, and bandwidth are rapidly becoming mainstream. Conventional memory management techniques do not suffice for these systems; they require alternative strategies to appropriately and effectively adapt application memory placement to these heterogeneous memory tiers. Software-based placement and movement strategies are the most desirable due to their flexibility and ease of adoption by end-users. However, there are substantial sources of overhead present when synchronizing low-level data movement with the operating system and running applications.This thesis proposes a novel method of reducing these memory movement overheads on hybrid memory systems. Many data …


Microbial Memory Response: Observing History-Dependent Adaptation To Repeated Exposures Of Emulsified Vegetable Oil In A Contaminated Aquifer, Kathryn R. Mcbride Dec 2018

Microbial Memory Response: Observing History-Dependent Adaptation To Repeated Exposures Of Emulsified Vegetable Oil In A Contaminated Aquifer, Kathryn R. Mcbride

Masters Theses

The utilization of native microbial communities to remediate and immobilize hazardous contaminants has been a common practice for decades. One technique commonly employed to enhance this process is biostimulation, where limiting nutrients are added to a contaminated system in order to stimulate favorable reducing conditions for specialized microorganisms. Many biostimulation applications have been conducted using emulsified vegetable oil (EVO), which stimulates growth of indigenous microbial communities and favorable reducing conditions. However, this practice is sometimes known to cause a lag phase before degradation can occur, lessening the overall efficiency of this practice. The studies described herein aim to reduce the …


Identifying Factors Associated With Lying Behavior And Mastitis In Organic Dairy Cows, Victoria Couture Dec 2018

Identifying Factors Associated With Lying Behavior And Mastitis In Organic Dairy Cows, Victoria Couture

Masters Theses

Dairy cow health and welfare recommendations based on lying behavior and udder health are standardized in systems that rely on confined housing. However, factors may influence mastitis and behavior differently under organic pasture systems, due to changes in time budgets and treatment methods. Our objectives were to 1) determine the association of lying behaviors with cow-level factors, including milk yield, DIM, and parity when cows are managed under two organic management systems 2) identify probability of subclinical mastitis on organic farms in the southeastern region of the US and 3) characterize frequency and probability of mastitis-causing organisms by season, parity, …


Minority Stress And Lgbq College Students' Depression: Roles Of Peer Group And Involvement, Danielle Leigh Bissonette Dec 2018

Minority Stress And Lgbq College Students' Depression: Roles Of Peer Group And Involvement, Danielle Leigh Bissonette

Masters Theses

In this study, we examined the relations between LGBQ microaggressions and internalized heterosexism and depression among 568 LGBQ college students who completed an online survey. We also considered the moderating/buffering roles of positive peer group relations and involvement in LGBQ campus activities in these links. Results showed that LGBQ microaggressions and internalized heterosexism were positively related to depression at the bivariate level. Hierarchical multiple regression analysis showed that positive peer group relations moderated the relation between internalized heterosexism and depression. Internalized heterosexism predicted depression for students with low levels of positive peer group relations, but not for those with moderate …


Forage Mass, Nutritive Value And Persistence Of Alfalfa And Alfalfa Mixtures As Influenced By Forage Management, Marcia Pereira Da Silva Dec 2018

Forage Mass, Nutritive Value And Persistence Of Alfalfa And Alfalfa Mixtures As Influenced By Forage Management, Marcia Pereira Da Silva

Masters Theses

The utilization of alfalfa (Medicago sativa) alone or in mixtures with tall fescue (Lolium arundinaceum (Schreb.) Darbyish) or bermudagrass (Cynodon dactylon (L.) Pers) in the Southeast U.S. must be assessed so better management recommendations can be given. The objective of this first study was to determine the cumulative capacity of alfalfa in monoculture (A) and mixtures with tall fescue (ATF) and bermudagrass (AB), and its indirect improvements on the nutritive (NV). Three species combinations were utilized (A, ATF and AB) and subjected to four harvest frequencies (21, 28, 35 and 42 days) throughout the 2016 and …


The Non-Linear Energy Sink Applied To Vertical Floor Vibration Mitigation, James Ridge Ramsey Dec 2018

The Non-Linear Energy Sink Applied To Vertical Floor Vibration Mitigation, James Ridge Ramsey

Masters Theses

This thesis investigates the non-linear energy sink (NES) and its application to floor vibration mitigation. The NES is a passive type mass damper comprised of an essentially non-linear stiffness component. This non-linear stiffness property allows the NES to interact with a wide variety of frequency regimes that can vary both widely and randomly throughout flooring systems. Flooring systems are regularly subjected to these changing inputs from general use and occupancy, as well as, human and mechanical induced loading. It is known that the NES has been successfully implemented for vibration mitigation in the horizontal direction. However, to achieve this non-linearity …


A Fine Scale Population Genetics Study Of The Rare Helianthus Verticillatus, Tyler Patton Edwards Dec 2018

A Fine Scale Population Genetics Study Of The Rare Helianthus Verticillatus, Tyler Patton Edwards

Masters Theses

Helianthus verticillatus, the whorled sunflower, is a rare plant endemic to only four locations: one in Cave Springs, Georgia, one in Cherokee County, Alabama and two in Madison County, Tennessee. The species can grow up to three meters tall and has multiple showy yellow blooms making it a prime ornamental plant that is attractive to many different pollinators. This plant was designated as a federally endangered species in 2014 due to habitat loss. Currently, there is no recovery plan for H. verticillatus. Still, there are large gaps in knowledge related to basic biology of this plant and its …


Effect Of Uterine And Vaginal Bacteriomes On Fertility In Postpartum Beef Cows, Taylor Brianne Ault Dec 2018

Effect Of Uterine And Vaginal Bacteriomes On Fertility In Postpartum Beef Cows, Taylor Brianne Ault

Masters Theses

Infertility in beef and dairy cattle costs millions of dollars each year to the animal agriculture industry. The microbiome of the reproductive tract has been indicated to have an effect on pregnancy establishment and maintenance in humans, however the bovine reproductive microbiome and its effect on fertility is not well understood. The objective of the current study is to evaluate bacterial communities of the uterus and vagina of postpartum beef cows undergoing estrous synchronization to determine differences in cows who will become pregnant and those who fail to conceive to fixed time artificial insemination (FTAI). Thirty Angus cows at an …


Me, Meat, And Mo'town: A Multisensory Ethnography Of Morristown, Tennessee, Caitlin Mize Dec 2018

Me, Meat, And Mo'town: A Multisensory Ethnography Of Morristown, Tennessee, Caitlin Mize

Masters Theses

The 20th century was a time of substantial change in American farming communities. Researchers have documented the environmental and community impacts of corporate-controlled food crop production and corporate-controlled beef and pork production and processing. Far less research focuses on either corporate-controlled poultry production or processing. This project aims at those gaps in the literature with an exploratory case study of the former family farming community of Morristown, Tennessee.After analyzing literature on the characteristics that most distinguish family farming communities from corporate farming communities, I drew insights from the literature on sense of place and deployed the multisensory ethnography method. In …


Investigation Of Silver Nitrate–Impregnated Alumina As An Alternative Iodine Sorbent, Jacob A. Jordan Dec 2018

Investigation Of Silver Nitrate–Impregnated Alumina As An Alternative Iodine Sorbent, Jacob A. Jordan

Masters Theses

United States regulations on nuclear reprocessing would limit the release of certain radioactive volatile species, including 3H, 14C, 85Kr, and 129I. Conservative analyses indicate that >99.9% of the iodine contained in used nuclear fuel could require capture. Solid sorbents for this application include silver mordenite (AgZ) and silver nitrate–impregnated alumina (AgA). AgA has been studied previously under simulated possible reprocessing conditions to assess its effectiveness as an iodine sorbent, and those results have been compared with well-characterized AgZ.To date, AgZ and AgA have been investigated for use in iodine capture from off-gas generated by aqueous fuel …


The Freshwater Mussels (Bivalvia: Unionidae) Of The Harpeth River Drainage And The Upper And Middle Duck River Tributaries, Tennessee, Kristin Leigh Irwin Dec 2018

The Freshwater Mussels (Bivalvia: Unionidae) Of The Harpeth River Drainage And The Upper And Middle Duck River Tributaries, Tennessee, Kristin Leigh Irwin

Masters Theses

The Cumberland and Tennessee River drainages harbor high diversity and endemism of freshwater mussels. The faunas of the Harpeth River drainage and Duck River tributaries have been disproportionally understudied relative to other Cumberlandian streams. Forty-two sites on 23 tributaries in the Harpeth River drainage and a 21-kilometer reach of the main channel were assessed qualitatively for freshwater mussels. Relic shells of four species were observed in eight sites on four of the tributaries. Twenty species were observed in the main channel including the discovery of a new Harpeth River drainage record: Simsponaias ambigua. Catch per unit effort (CPUE) ranged …


Muslims And Public Places: A Platform For Inclusion Or Exclusion?, Nastaran Abdoli Dec 2018

Muslims And Public Places: A Platform For Inclusion Or Exclusion?, Nastaran Abdoli

Masters Theses

This thesis investigates the experiences of first-generation and second-generation Muslim immigrants in Knoxville, Tennessee. It is based on fieldwork, participant observation, and interviews conducted from August 2017 to June 2018. The interviews were conducted with fifteen individuals, eleven women and four men who were recruited through Muslim Centers in Knoxville and the University of Tennessee campus. I argue that social pressure and the negative climate affects the way Muslims are treated in the United States in public places. Muslim immigrants in Knoxville had positive and negative experiences of being in public places. They use public places for religious holidays and …


Mapping And Analysis Of Wrinkle Ridges In The Aeolis Dorsa Region, Mars: Implications For Stress Fields And Geologic Substrates, Rose Borden Dec 2018

Mapping And Analysis Of Wrinkle Ridges In The Aeolis Dorsa Region, Mars: Implications For Stress Fields And Geologic Substrates, Rose Borden

Masters Theses

Wrinkle ridges are tectonic geologic features found throughout the inner solar system. They are asymmetric, curvilinear ridges with a complex morphology interpreted to be due to deformation along thrust faults. Previous studies have mostly focused on large wrinkle ridges with maximum widths and lengths measuring tens and hundreds of kilometers, respectively. However, recent high-resolution data of the Martian surface have revealed small wrinkle ridges in the Aeolis Dorsa (AD) region along the global dichotomy boundary. Mapping and analyzing such small-scale wrinkle ridges can provide valuable information on tectonic processes operating at the regional or local scale. The null hypothesis driving …


Gan-Based Point-Of-Load Converters For Data Center Applications, Douglas Wayne Bouler Iii Dec 2018

Gan-Based Point-Of-Load Converters For Data Center Applications, Douglas Wayne Bouler Iii

Masters Theses

The growth of the information technology sector has increased demand for high-density, high-efficiency point-of-load (POL) converters. As industry continues to demand an increase in server processing power, high-current operation presents challenges to designing high-efficiency POL converters. Increased conduction and overlap losses induce significant power losses in high-power modes. The introduction of Gallium-Nitride (GaN) switching devices and the implementation of zero-current-switching (ZCS) topologies for POL applications have the potential to improve converter efficiency while maintaining or surpassing the industrial power density standard. This thesis addresses the challenges presented by high-current operation by demonstrating an accurate power loss model of the quasi-resonant …


Studies In Hydrogel Microfluidics And Development Of Low Cost Imaging For Quantitative Tlc In The Undergraduate Teaching Laboratory, Alexandra Marie Anderson Dec 2018

Studies In Hydrogel Microfluidics And Development Of Low Cost Imaging For Quantitative Tlc In The Undergraduate Teaching Laboratory, Alexandra Marie Anderson

Masters Theses

Microfluidics is the micrometer-scale manipulation of small volumes of fluids, which allows the miniaturization of benchtop biological and chemical assays. Small volume analyses provide analytical and practical advantages like high precision, temporal resolution, throughput, speed, portability, and low cost and reagent consumption. Microfluidics is particularly suited to studying microscale problems, and so has been used to model biological systems like the microvasculature. Such biomimics have been produced in many ways, including 3-D printing and self-organization through various extracellular matrices. An attempt at templating a perfusable microvessel mimic through hydrogel in a microfluidic device is described in chapter 2.Thin-layer chromatography (TLC) …


Approach To Qualification For Electron Beam Powder Bed Fusion In Ti-6al-4v, Sean Lucas Yoder Dec 2018

Approach To Qualification For Electron Beam Powder Bed Fusion In Ti-6al-4v, Sean Lucas Yoder

Masters Theses

Recent developments in additive manufacturing (AM) show promise for using AM manufactured components in a production setting. However, a crucial step for mass producing AM components is to certify these parts for use. One common method for certifying parts is to manufacture tensile coupons alongside any parts. These coupons are characterized and the results are related to the parts. This causes many researchers to focus on the process-material interactions while neglecting build setup. Another issue related to certification of AM parts is the lack of knowledge in the software calculations for a given process. Original equipment manufacturers (OEM), such as …


Survival And Conflict Behavior Of American Black Bears After Release From Appalachian Bear Rescue, Coy Dale Blair Dec 2018

Survival And Conflict Behavior Of American Black Bears After Release From Appalachian Bear Rescue, Coy Dale Blair

Masters Theses

Wildlife agencies are forced to deal with difficult situations when orphaned or injured American black bear (Ursus americanus) cubs (<12 months old) or yearlings (>12 and <24 months old) are captured. However, bears have strong public support and interest and simply euthanizing orphaned animals would be opposed by much of the public. One option is bear rehabilitation. Unfortunately, the survival and movements of bears released from rehabilitation facilities are rarely documented. My goal was to assess survival and post-release conflict of orphaned bear cubs and yearlings following rehabilitation and release from a rehabilitation facility, Appalachian Bear Rescue (ABR), in Townsend, Tennessee, USA. My specific objectives were to (1) estimate first-year survival, (2) identify key variables affecting survival, (3) determine cause-specific mortality, and (4) assess conflict behavior of bears released from ABR. I hypothesized that rehabilitated bears would survive at similar rates, die from similar causes, and engage in similar conflict behavior to wild conspecifics. I equipped 42 black bear cubs and yearlings from ABR with Global Positioning System (GPS) wildlife tracking collars during 2015 and 2016 and released them in either Great Smoky Mountains National Park (GSMNP) or Cherokee National Forest (CNF). I estimated survival using known-fate methods in Program MARK. Wildlife agencies provided reports of released bears in conflict situations. I estimated survival by treating lost telemetry signals as collar failure on a living bear (optimistic estimate) or as collar destruction related to mortality (pessimistic estimate). Pessimistic and optimistic estimates of overall annual survival of bears was 0.88 (SE = 0.07) and 0.93 (SE = 0.06), respectively. Survival for bears released as cubs (0.64, SE = 0.14, n = 13) was lower than for bears released as yearlings (1.00, SE = 0.00, n = 29), and the major cause of mortality was vehicular-collisions. Three of 42 bears (7.1%) released from ABR engaged in conflict up to 1 year post-release. Survival, cause-specific mortality, and engagement in post-release conflict of my study bears was similar to or higher than published reports for wild conspecifics. Bear rehabilitation should be considered a viable option for orphaned or …


A Physics-Based Analytical Compact Model, Tcad Simulation, And Empirical Spice Models Of Gan Devices For Power Applications, Frances D. Garcia Dec 2018

A Physics-Based Analytical Compact Model, Tcad Simulation, And Empirical Spice Models Of Gan Devices For Power Applications, Frances D. Garcia

Masters Theses

The demand for high performance power electronics in consumer electronics, electric vehicle, aerospace, renewable energy is increasing and Si devices are failing to meet the demands of higher voltage, higher current, and high switching frequency efficiency.Wide bandgap devices, SiC and GaN, offer an alternative solution since they can operate at higher temperatures. GaN in particular is only recently being developed commercially and has a higher mobility, saturation velocity, electric breakdown field, and bandgap. GaN experiences spontaneous and piezoelectric polarization which is exploited in the high electron mobility transistor (HEMT) topology by creating a two dimensional electron gas (2DEG) that forms …