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Dynamic Evolution Patterns Of Legislative Efforts On Forestry-Prescribed Fires, Welgamage Kalani Gayathri Perera May 2024

Dynamic Evolution Patterns Of Legislative Efforts On Forestry-Prescribed Fires, Welgamage Kalani Gayathri Perera

Theses and Dissertations

Forestry-prescribed fires have been essential for managing forestland and reducing the risk of catastrophic wildfires. However, the use of prescribed fires has also raised concerns about their potential environmental and social impacts, leading to the development of various statutes and regulations that govern their implementation. This study explores the evolving legislative efforts related to forestry prescribed fire in managing forests and reducing wildfire risks to assess their dynamic nature. Determinants behind these legislative patterns are examined using qualitative content analysis and a binary logit model. A total of 199 legislative bills related to forestry prescribed fire were identified from 1995 …


Density Distribution Of Nuclei: From Charge Radii To Bubbles In Covariant Density Functional Theory (Cdft), Udeshika C. Perera May 2024

Density Distribution Of Nuclei: From Charge Radii To Bubbles In Covariant Density Functional Theory (Cdft), Udeshika C. Perera

Theses and Dissertations

This dissertation applies covariant density functional theory (CDFT), one of the modern theoretical approaches for describing finite nuclei and neutron stars, to investigate the density distribution of nuclei, which is a manifestation of the nodal structure of the single-particle states in physical phenomena, including charge radii and bubbles. A systematic global investigation of differential charge radii has been performed within the CDFT framework for the first time. Available experimental data is compared with theoretical charge radii across the neutron shell closures at N = 28, 50, 82, and 126. Odd-even staggering (OES) in charge radii are believed to be primarily …


Evaluating Simulated Tarnished Plant Bug Damage During Late Bloom On Cotton Yield, Seth Thomas Permenter May 2024

Evaluating Simulated Tarnished Plant Bug Damage During Late Bloom On Cotton Yield, Seth Thomas Permenter

Theses and Dissertations

The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), is an important economic pest of cotton, Gossypium hirsutum (L.), in the Midsouth region of the United States. Continuous season long infestations may result in four or more insecticide applications per growing season. However, late season applications may only be preventing minor losses when compared to overall yield. Results from this study suggest an opportunity to increase thresholds and potentially eliminate one to two insecticide applications in late bloom. Results from this experiment show no significant differences in yield when all square removal levels were simulated in the fourth and fifth …


Process Parameter Optimization Of M300 Maraging Steel And Mechanical Characterization Of Uniformly And Selectively Scaled M300 Cellular Structures, Haley Elizabeth Petersen May 2024

Process Parameter Optimization Of M300 Maraging Steel And Mechanical Characterization Of Uniformly And Selectively Scaled M300 Cellular Structures, Haley Elizabeth Petersen

Theses and Dissertations

Laser powder bed fusion is a type of metal-based additive manufacturing method that can be customized for a given material through modification of process parameters, resulting in changes to the overall quality and mechanical properties of the as-built component. Optimal mechanical properties are typically achieved by performing experimental builds of fully dense components with multiple parameter sets and comparing the resulting mechanical properties. Additionally, AM allows geometric freedom that can be utilized to produce structures tailored for energy absorption, such as cellular structures or lattice structures. There is limited previous work of scaling effects on mechanical properties of cellular structures. …


Campylobacter Jejuni Survival Under Environmental Stressors, Diksha Pokhrel May 2024

Campylobacter Jejuni Survival Under Environmental Stressors, Diksha Pokhrel

Theses and Dissertations

Campylobacter jejuni is microaerophilic pathogen and is one of the leading causes of acute diarrhea in the United States. Despite being a microaerophilic pathogen, C. jejuni continues to endure within the domain of food production, especially in poultry processing. In this study, we evaluated the aerotolerance, biofilm forming abilities, and genetic diversity of C. jejuni isolates previously obtained from commercial broiler processing plants. Out of 40 isolates, 25 (62.5%) were aero–sensitive (AS), 10 (25%) were intermediately aerotolerant (IAT), and 5 (12.5%) were hyper aerotolerant (HAT). The isolates belonged to four clonal complexes (CCs) and six sequence types, with the majority …


Diet Quality, Food Insecurity, And Periodontal Disease In Hispanic Men In The United States, Bennett R. Pope May 2024

Diet Quality, Food Insecurity, And Periodontal Disease In Hispanic Men In The United States, Bennett R. Pope

Theses and Dissertations

Food insecurity, poor diet quality, and periodontal disease are critical problems in the United States, yet limited studies examine how these three conditions are related. Men and the Hispanic population suffer a disproportionate burden of periodontal disease and are understudied groups. Using NHANES data from 2015 to 2018 and the HEI-2015, this study describes the prevalence of men’s periodontitis and its association with food insecurity and diet quality. The final sample was 4,582 men, aged 30 years or older, of whom 1,130 were Hispanic. Odds ratios were calculated via multivariable logistic regression models. Very low food security significantly increased the …


Exploring The Relationship Between Network Topology And Braess Paradox, Samuel Giftson Prabhakar May 2024

Exploring The Relationship Between Network Topology And Braess Paradox, Samuel Giftson Prabhakar

Theses and Dissertations

The Braess Paradox is a rare phenomenon that only occurs under specific scenarios. This project aims to study the probability of the Braess Paradox occurring in a Directed Weighted Graph while the number of edges increases. The graphs in the experiment are focused on studying the occurrence of the Braess Paradox in a directed weighted scale-free network while transforming it into a directed weighted complete graph. A simulation model is used to simulate the bots traveling through a network to detect the occurrence of the Braess Paradox, considering the increase of directed weighted edges. A Graph Neural Network (GNN) is …


Investigating The Pretesting Effect Under Cognitive Load Through Increased Playback Speed, Oscar Ramirez Perez May 2024

Investigating The Pretesting Effect Under Cognitive Load Through Increased Playback Speed, Oscar Ramirez Perez

Theses and Dissertations

Pretesting prior to a study session has been shown to benefit memory for pretested information compared to traditional study. While previous research has not found a detriment to non-pretested but related material, it is possible that taxing attention by increasing the playback speed of presented material could reveal such impairments. The current study (N = 239) compared multiple-choice learning from educational videos at 1x, 1.5x, and 2x speeds. Three videos (one at each speed) were presented after a pretest, for which half of the tested material was pretested, and half was not (non-pretested related). Another three videos were presented without …


Inclusion: Survey Of Mississippi General And Special Education Teachers View And Experiences In An Inclusion Classroom, Patricia Ratliff May 2024

Inclusion: Survey Of Mississippi General And Special Education Teachers View And Experiences In An Inclusion Classroom, Patricia Ratliff

Theses and Dissertations

Considering the significance of integrating students with disabilities into general education classes in Mississippi, it is critical to identify the methods by which co-teachers report working together, whether they have obtained the needed professional development, and which teaching model they employ in the inclusion classroom. This data can facilitate the assessment and efficacy of inclusive practices and offer valuable insights into potential areas requiring enhancement. Furthermore, by gaining insight into the experiences of co-teachers, future training initiatives and assistance for educators in advocating for the effective integration of students with disabilities can be enhanced. The purpose of this research was …


Multi-Scale Experimental Characterization Of The Material Properties And Interlaminar Fracture Toughness Of T700g/Lm-Paek Thermoplastic Composites And Additively Manufactured Composite Materials, Ryan Gregory Premo May 2024

Multi-Scale Experimental Characterization Of The Material Properties And Interlaminar Fracture Toughness Of T700g/Lm-Paek Thermoplastic Composites And Additively Manufactured Composite Materials, Ryan Gregory Premo

Theses and Dissertations

This thesis is focused on the development of multiple experimental frameworks to characterize the material properties of composite materials for the LS-DYNA MAT213 model. The main objective is to characterize these properties based on the full-field capture of the evolution of strain and stress fields in coupon-level tests at multiple scales (i.e. macroscopic and microscopic). The experimental work characterized the full-field stress-strain curves and subsequently derived the material properties of T700G/LM-PAEK thermoplastic composites. The data was later successfully utilized to generate the deformation and damage sub-models in the LS-DYNA MAT213 model for the material. Additionally, a three-point bending test methodology …


Synthesis Of Achiral And Chiral Ccc-Nhc Ligands And Metal Complexes For Their Catalytic Applications In C-H Functionalization Of Indoles With Diazoacetates And Benzoin Condensation, Maitreyee Rawat May 2024

Synthesis Of Achiral And Chiral Ccc-Nhc Ligands And Metal Complexes For Their Catalytic Applications In C-H Functionalization Of Indoles With Diazoacetates And Benzoin Condensation, Maitreyee Rawat

Theses and Dissertations

The N-heterocyclic carbene (NHCs) based pincer ligands field is still in its infancy after decades. They are known for their applications in organocatalysis, coordinating with transition metals and p-block elements, catalysis, and material chemistry. Among all NHCs, CCC-NHC-based on late-transition metal complexes were first developed by our group in 2005 with a unique metalation/transmetalation strategy. Our group also designed the chiral version of these CCC-NHC ligands to synthesize its metal complexes. However, their asymmetric catalytic applications were unknown. Wanting to expand on this work, we first successfully synthesized achiral CCC-NHC pincer complexes and their new catalytic application, as it is …


Understanding And Incorporating Wearable Exoskeleton Design Acceptance Into The Construction And Manufacturing Industries By Evaluating Key Stakeholders Within An Enterprise Organization, Matthew Reese May 2024

Understanding And Incorporating Wearable Exoskeleton Design Acceptance Into The Construction And Manufacturing Industries By Evaluating Key Stakeholders Within An Enterprise Organization, Matthew Reese

Theses and Dissertations

Safety, quality, and production are critical factors that impact an enterprise organization’s success in industries where tasks are human-centered. One emerging area to help mitigate safety related concerns while enhancing quality and production is wearable technology. More specifically, studies have shown that wearable exoskeletons can prevent awkward posturing and excessive bending and reaching tasks. These are areas that can result in injuries and lost time for employees. While literature has shown that these devices can help prevent injuries and can assist employees with their job tasks, these devices are new, which can make critical stakeholders of an enterprise organization skeptical …


Generation Z’S Perceptions Of Public Sector Culture Moderate Their Aspirations Towards Public Service, Andrew S. Rendon May 2024

Generation Z’S Perceptions Of Public Sector Culture Moderate Their Aspirations Towards Public Service, Andrew S. Rendon

Theses and Dissertations

Within the next 15 years, a significantly large percentage of adults will exit the U.S. public sector workforce, taking their experience and knowledge with them. This considerable number of departures from the public sector workforce is expected to create a crisis of sorts for society as it grapples with how to ensure the public sector is not without its most important feature – public servants. The immediate crisis relates to how we, in record time, recruit and retain a new and highly qualified workforce that can quickly fill the gaps left by the exodus. Recently coming into their adult age, …


La Deconstrucción De La Idea De Maternidad En Dos Novelas Colombianas: La Perra De Pilar Quintana Y Esta Herida Llena De Peces De Lorena Salazar Masso, Catalina Revelo May 2024

La Deconstrucción De La Idea De Maternidad En Dos Novelas Colombianas: La Perra De Pilar Quintana Y Esta Herida Llena De Peces De Lorena Salazar Masso, Catalina Revelo

Theses and Dissertations

Esta tesis examina la deconstrucción de nociones tradicionales sobre la maternidad en dos novelas colombianas contemporáneas: La perra de Pilar Quintana y Esta herida llena de peces de Lorena Salazar Masso. Mediante un análisis literario feminista, se argumenta que ambas obras ofrecen representaciones transgresoras de la experiencia materna que desafían mandatos culturales normativos. Basándose en marcos teóricos de Simone de Beauvoir, Hélène Cixous y Susan Reisz, entre otros, se explora cómo estas novelas problematizan concepciones esencialistas de la maternidad como destino natural femenino. A través de una lectura atenta, se demuestra cómo estas narrativas dan voz a las sombras y …


The Effects Of Cover Crops And Reduced Tillage Practices On Soil Moisture, Cotton Yield, Irrigation Water Use, And Profitability, Carson David Roberts May 2024

The Effects Of Cover Crops And Reduced Tillage Practices On Soil Moisture, Cotton Yield, Irrigation Water Use, And Profitability, Carson David Roberts

Theses and Dissertations

Aquifer resources in the mid-southern USA are declining because of irrigation water use in row crops. This study assesses the effectiveness of conservation tillage and cover cropping systems in reducing irrigation water use while improving or maintaining cotton yield and profitability. The effects of different tillage and cover crop cropping systems on soil moisture, irrigation water use, cotton yield, and profitability were investigated near Stoneville, MS on a Dubbs silt loam (fine-silty, mixed, active, thermic Typic Hapludalfs) and a Bosket very fine sandy loam (fine-loamy, mixed, active, thermic Mollic Hapludalfs). Reducing tillage reduced irrigation water use by 3.3 cm ha-1, …


The Transnational Beat: Paramilitary Policing And America’S Associational Defense State, Ryan Reynolds May 2024

The Transnational Beat: Paramilitary Policing And America’S Associational Defense State, Ryan Reynolds

Theses and Dissertations

This study addresses the role of Cold War-era American law enforcement and intelligence institutions in shaping U.S. grand strategy and carrying out paramilitary operations. It examines American civil-military relations through the formal and informal relationships between the U.S. military, private organizations, and American law enforcement personnel within a framework I call “associational defense.” The concept provides a framework for observing and comprehending the existence of an American garrison state. While police institutions are civil institutions and not military organizations, law enforcement possessed a paramilitary mission throughout the Cold War and into the War on Drugs and the Global War on …


Role Of A Precision Biotic And A Protease Fed Alone And In Combination To Dekalb White Laying Hens At Peak Production Phase, Elsianna Rodewald May 2024

Role Of A Precision Biotic And A Protease Fed Alone And In Combination To Dekalb White Laying Hens At Peak Production Phase, Elsianna Rodewald

Theses and Dissertations

A precision biotic (PB) in standard and reduced CP diets, and a protease (PRO) used alone and in combination with PB in the reduced CP diet were evaluated. Effects on performance, digestibility, and blood biomarkers were determined in Dekalb White hens from 24 to 42 weeks of age. Nine diets were fed: 1) a standard diet with a 17.5% formulated CP level (T1); 2) T1 with 500ppm PB (T2); 3) T1 with 700ppm PB (T3); 4) a reduced CP diet with a 15.5% formulated CP level (T4); 5) T4 with 500ppm PB (T5); 6) T4 with 700ppm PB (T6); 7) …


Magnetite-Laden Douglas Fir Biochar For Arsenic And Perfluoroalkyl Substances Contaminated Water Remediation And Struvite/Struvite-K Rich Douglas Fir Biochar For Soil Remediation, Paththinihannadige W. K. P. M. Rodrigo May 2024

Magnetite-Laden Douglas Fir Biochar For Arsenic And Perfluoroalkyl Substances Contaminated Water Remediation And Struvite/Struvite-K Rich Douglas Fir Biochar For Soil Remediation, Paththinihannadige W. K. P. M. Rodrigo

Theses and Dissertations

Ensuring the safety of drinking water, treating wastewater, and remediating soil are ongoing global concerns. Adsorption is a favorable substitute for traditional methods including coagulation, precipitation, membrane separation, and ion-exchange in water purification. Biochar-based sorbents are cheap and effective due to high density surface functional groups, which can retain a wide range of chemicals. This dissertation focused on three main projects involving magnetite (Fe3O4) and struvite/struvite-K (MgNH4PO4.6H2O/MgKPO4.6H2O) deposited high surface area Douglas fir biochar (DFBC) based engineered material for water and soil remediation. Chapter II focuses on toxic arsenic (V) contaminated wastewater remediation using magnetite particles dispersed Douglas fir biochar. …


A Tripartite Study On Climate Change, Nitrogen-Sulfur Interactions, And Sulfur’S Role In Mississippi Corn Production, Ramandeep Kumar Sharma May 2024

A Tripartite Study On Climate Change, Nitrogen-Sulfur Interactions, And Sulfur’S Role In Mississippi Corn Production, Ramandeep Kumar Sharma

Theses and Dissertations

Three studies were conducted with the objectives as i) to assess the impact of climate change on Mississippi (MS) corn production using 1970 to 2020 datasets, employing autoregressive distributed lag model (ARDL), ii) A narrative review on the role of sulfur (S) in crop production, and iii) to investigate the corn response to multiple rates of nitrogen (N) and S. The first study findings revealed that the maximum temperature and precipitation had a negative effect on MS corn yield while minimum temperature and CO2 emissions posed a positive effect on corn yield. The second review study discussed the need for …


Preparing To Come Home, Not Recidivate: Juvenile Offenders' Perceptions Of The Juvenile Justice System, Robbie Kaitlyn Salters May 2024

Preparing To Come Home, Not Recidivate: Juvenile Offenders' Perceptions Of The Juvenile Justice System, Robbie Kaitlyn Salters

Theses and Dissertations

Crimes committed by juvenile offenders are a significant concern of society. In response to this concern, the juvenile justice system addresses juvenile crimes in a developmentally appropriate manner. The goal of the juvenile justice system is to rehabilitate juvenile offenders and steer them from a life of crime and toward becoming productive members of society. Yet, some juvenile offenders continue to offend. While research has explored juvenile offenders’ perceptions of juvenile delinquency, re-entry, and recidivism, less is known about how the detention center prepares juvenile offenders for re-entry. The following study explores the perceptions of detained juvenile offenders in a …


“Freakish Man”: Sexual Blues, Sacred Beliefs, And The Transformation Of Black Queer Identity, 1870-1957., Xavier E. Sivels May 2024

“Freakish Man”: Sexual Blues, Sacred Beliefs, And The Transformation Of Black Queer Identity, 1870-1957., Xavier E. Sivels

Theses and Dissertations

“‘Freakish Man’: sexual blues, sacred beliefs, and the transformation of Black queer identity, 1870-1959” investigates how queer Black men expressed their gender and sexual identities. It follows how, from the days of Reconstruction to the modern civil rights movement, queer Black men used various aspects of Black culture—particularly the blues, working-class social culture, and charismatic religion—to form identities that departed from dominant Black and white norms. The “freakish man” emerged as queer Black men cultivated legible, subversive gender and sexual identities in sacred and secular spaces of working-class Black culture that prioritized masculine heterosexuality. Though queer Black men were briefly …


The Performance Of Participation In The Medicare Quality Payment Program, Mary Atkinson-Smith May 2024

The Performance Of Participation In The Medicare Quality Payment Program, Mary Atkinson-Smith

Theses and Dissertations

This dissertation aims to explore the performance of health provider participation inthe Medicare Quality Payment Program by investigating the relationship among the performance metrics of value and quality and the capacities of geography, technology, finance, and administration. There is a theory-practice gap in the research that examines the impact of these capacities on the value and quality of clinical services delivered by healthcare providers participating in the Medicare Quality Payment Program. The study will address this theory-practice gap by applying the capacity-performance paradigm to better understand the influences of geographical, technological, financial, and administrative capacity have on the performance of …


An Examination Of Teacher Candidates’ Planning Processes As They Seek To Integrate Technology Into Disciplinary Literacy Instruction, Kimberly O. Smith May 2024

An Examination Of Teacher Candidates’ Planning Processes As They Seek To Integrate Technology Into Disciplinary Literacy Instruction, Kimberly O. Smith

Theses and Dissertations

Demands of the workplace and society have made 21st-century knowledge and skills critical elements for success. As a result, the role of teachers in adequately preparing students to meet these demands continues to grow. National and state standards also call for increased attention to multimodal reading and writing. Today’s teachers must have the skills to effectively integrate technology into teaching and learning, supporting student development of digital reading and writing skills. Unfortunately, many teachers do not feel adequately prepared to do this (Hutchison & Reinking, 2011). Teacher education preparation programs must intentionally design programs to prepare teacher candidates for this …


The Role Of Subsurface Dynamics In Cometary Outbursts, Ahmad Sohani May 2024

The Role Of Subsurface Dynamics In Cometary Outbursts, Ahmad Sohani

Theses and Dissertations

Comets, often referred to as cosmic time capsules, serve as invaluable repositories of information from the nascent phases of our solar system. Varying significantly in size, with nuclei ranging from a few kilometers to tens of kilometers in diameter, these celestial bodies are complex, porous aggregates of organic molecules, silicate particles, and entrapped volatile gases. Their orbits, which can be categorized into the Main Belt, the Kuiper Belt, and the Oort Cloud, offer distinct insights into their origins and the early conditions of the solar system. Understanding the physical processes occurring within these nuclei is critical, particularly in the context …


Evaluating Efficacy Of Modified Barrier Operations To Limit Silver Carp Movements In The Mississippi Alluvial Valley, Joshua Stafford May 2024

Evaluating Efficacy Of Modified Barrier Operations To Limit Silver Carp Movements In The Mississippi Alluvial Valley, Joshua Stafford

Theses and Dissertations

Invasive Silver Carp (Hypophthalmichthys molitrix) have spread throughout the Mississippi River basin and threaten native species. The Lower Mississippi Alluvial Valley has numerous water-control structures. These structures could potentially be operated to limit expansions of invasive fishes. My goal was to examine the effects of two water-control structures on movements of Silver Carp within a floodplain network of waterbodies, including an oxbow lake (Eagle Lake; LA, MS). I monitored Silver Carp movements with an acoustic array and bi-monthly active tracking. No movements occurred through the structure managed to deter carp while nine carp passed through the structure that is not …


Forest Structure And Edge Effects On Bee Functional Diversity In Private, Working Pine Forests, Madalyn Stoecker May 2024

Forest Structure And Edge Effects On Bee Functional Diversity In Private, Working Pine Forests, Madalyn Stoecker

Theses and Dissertations

Private, working forests provide unique opportunities for biodiversity research and management. Even-aged management often creates a heterogeneous mosaic of forest stands in southeastern loblolly pine (Pinus taeda) landscapes, with stands containing structural and compositional characteristics that support different bee functional groups. Interspersion of different structural conditions, combined with roads separating adjacent stands, leads to prevalence of edges across much of the landscape, which may have varying effects on bee species. I evaluated how landscape heterogeneity and presence of edge influences functional diversity in wild bee (Hymenoptera: Apoidea: Anthophila) communities during the summers of 2022 and 2023. Open conditions within early …


Ultrasonographic Evaluation Of Splenic Nodules And Masses With B-Flow Interrogation Correlates To Cytologic Or Histopathologic Characterization As Benign Or Malignant., William Spigener Stevenson May 2024

Ultrasonographic Evaluation Of Splenic Nodules And Masses With B-Flow Interrogation Correlates To Cytologic Or Histopathologic Characterization As Benign Or Malignant., William Spigener Stevenson

Theses and Dissertations

The use of brightness mode (B-mode) ultrasound (US), color Doppler (CD), and power Doppler (PD) can all help evaluate and characterize splenic lesions. A relatively new non-Doppler technology used to evaluate vasculature called B-Flow helps overcome certain limitations of CD and PD that affect visualization of blood flow. There are no studies describing the use of B-Flow characterizing splenic lesions in dogs. A total of 97 splenic lesions were evaluated. Splenic lesions that were larger than 2 cm, distorted the splenic capsule, or accompanied free fluid were significantly associated with malignancy. Lesions with tortuous internal vessels on CD or B-Flow …


Photocatalytic Disinfection Of Microbes In Water By Using Titanium Dioxide (Tio2) – Decorated Biochar, Aleria Story May 2024

Photocatalytic Disinfection Of Microbes In Water By Using Titanium Dioxide (Tio2) – Decorated Biochar, Aleria Story

Theses and Dissertations

Waterborne diseases, particularly those caused by microbial contamination such as Esche?richia coli (E. coli), present a global health challenge. This study centers on developing TiO2- decorated biochar nanocomposites, serving as a high-performance photocatalyst to combat E. coli contamination in water sources. TiO2 nanoparticles were synthesized using Flame Spray Pyrolysis (FSP) and deposited onto biochar. Structural and chemical properties were assessed using Scan?ning Electron Microscopy (SEM), X-ray Diffraction (XRD), and Fourier-Transform Infrared (FT?IR) spectroscopy. The nanocomposites were tested for photocatalytic disinfection efficiency under UV–Vis irradiation and petrifilm imaging data indicate significant E. coli inactivation, highlight?ing the potential of these nanocomposites for …


Maternal And Paternal Appearance-Related Pressure And Body Esteem In Emerging Adults: Moderation By Self Compassion And Gender, Alligrace Story May 2024

Maternal And Paternal Appearance-Related Pressure And Body Esteem In Emerging Adults: Moderation By Self Compassion And Gender, Alligrace Story

Theses and Dissertations

Previous research has shown that appearance-related pressures from multiple sources can influence body esteem in emerging adults. Furthermore, research has shown that self-compassion and gender play a role in body image and the relation between sociocultural pressures and body esteem. Less research has examined how these variables interact in their association with body esteem in emerging adults. Thus, the current study sought to assess these interactions. Participants (N = 877; 492 women) were primarily White (78.9% for women and 76.4% for men) and ranged in age from 18 to 28 (M = 18.70 for women and 19.10 for men). Participants …


Mitigating Delay And Coupling Effects In A High-Speed Pmsm Drive Using An Optimal Multivariable Control Approach, Kazi Nishat Tasnim May 2024

Mitigating Delay And Coupling Effects In A High-Speed Pmsm Drive Using An Optimal Multivariable Control Approach, Kazi Nishat Tasnim

Theses and Dissertations

In this thesis, an optimal multivariable current control method is presented for the highspeed permanent magnet synchronous motor (HS-PMSM). The HS-PMSMs have growing applications in the industry. One of their major challenges is the low switching to fundamental frequency ratio (SFR). At high speed and low SFR, the control time delays including the digital, the PWM, and sensor delays become more pronounced and lead to oscillations and even instabilities. A well-known method for delay compensation is to advance the phase angle of control input for a known amount. In practice, the exact delay is unknown, and mismatch in the compensating …