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2024

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The Line Between Man And Monster: A Theatrical Costume Design Of Caryl Churchill's The Skriker, Katrina Anne Lundquist Jan 2024

The Line Between Man And Monster: A Theatrical Costume Design Of Caryl Churchill's The Skriker, Katrina Anne Lundquist

Graduate Theses, Dissertations, and Problem Reports (ETD)

Produced at West Virginia University, this is a record of the costume design process for The Skriker by Caryl Churchill. As a play about vicious folkloric faerie creatures in modern day England, there was a heavy emphasis on showcasing the difference between the human and fae characters. With such a fantastical script, there is a potential to take the design down any number of creative paths. Finding a way to cohesively costume the cast while not losing the intricacies of their individual stories became a personal priority. After coming to an agreement with the director and the rest of the …


Factors Related To Adolescent Anger In Appalachia: Implications For Violence Prevention, Rosalina Mills Jan 2024

Factors Related To Adolescent Anger In Appalachia: Implications For Violence Prevention, Rosalina Mills

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background. Adolescent health outcomes are vitally important for public health. One such outcome includes adolescent violence, a persistent and prevalent public health issue in the United States. Adolescent violence in rural areas is particularly understudied and some measures of rural violence are underreported compared to violence metrics in urban areas. A key risk factor for adolescent violence, is anger. By examining known key risk factors for adolescent anger through a primary prevention and socioecological perspective, it may be possible to reduce or prevent downstream violence in adolescence and later adulthood. Identifying specific systemic, environmental, and interpersonal factors related to anger …


“Population, Proximity, And Promise: A Study Of College Choice And The Competition For Students In Higher Education”, Donielle Maust Jan 2024

“Population, Proximity, And Promise: A Study Of College Choice And The Competition For Students In Higher Education”, Donielle Maust

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation is an empirical investigation of the relationship between institution and state characteristics and college choice for students enrolling out-of-state, as well as the relationship between Promise programs and college choice. The theoretical framework used in this study draws on both an economic model of human capital investment and sociological concepts of habitus, cultural, and social capital, and organizational context and assumes that an individual’s college choice is shaped by four contextual layers: the individual’s habitus, school and community context, the higher education context, and broader social, economic, and policy context. Public data from the Integrated Postsecondary Education Data …


Childhood Adversity And Sexual Risk Taking In College: Pathways Through Alcohol Use, Sarah Josephine Miller Jan 2024

Childhood Adversity And Sexual Risk Taking In College: Pathways Through Alcohol Use, Sarah Josephine Miller

Graduate Theses, Dissertations, and Problem Reports (ETD)

Exposure to adverse childhood experiences (ACEs) is associated with a host of negative outcomes throughout the lifespan including engagement in health-risk behaviors such as sexual risk taking and alcohol consumption (Dube et al., 2006; Negriff et al., 2015; Zaso et al., 2021). Additionally, sexual risk-taking and alcohol use commonly co-occur (Certain et al., 2009; Downing-Matibag & Geisinger, 2009). This may be especially true during the transition to college, in which many young adults have increased access to substances, increased autonomy, and an expanded network of peers. Thus, the present study examined the relationship between ACEs, alcohol use, and sexual risk …


Far-Field Passive Wireless Sensors Composed Of Electroceramic Materials For Harsh Environment Applications, Kevin M. Tennant Jan 2024

Far-Field Passive Wireless Sensors Composed Of Electroceramic Materials For Harsh Environment Applications, Kevin M. Tennant

Graduate Theses, Dissertations, and Problem Reports (ETD)

The demand for high temperature sensing technologies in industrial applications has been steadily increasing, driven by the need for precise monitoring and control in extreme environments. This thesis presents an investigation into the development and optimization of passive wireless sensors for high temperature sensing applications. The research focuses on overcoming the challenges associated with traditional sensing methods by leveraging passive wireless sensor technology, offering advantages such as reduced complexity, improved reliability, and enhanced flexibility.

A passive wireless high temperature sensor for far-field applications was developed for stable temperature sensing up to 1000 °C. The goal is to leverage the properties …


Biology And Ecology Of Neonectria Magnoliae And Neonectria Punicea, Two Understudied Neonectria Species In West Virginia, Hannah Marie Petronek Jan 2024

Biology And Ecology Of Neonectria Magnoliae And Neonectria Punicea, Two Understudied Neonectria Species In West Virginia, Hannah Marie Petronek

Graduate Theses, Dissertations, and Problem Reports (ETD)

The family Nectriaceae includes numerous phytopathogenic fungi that cause canker diseases on both angiosperm and conifer hosts worldwide. Numerous Neonectria spp. cause cankers on hardwoods and conifers in North America, but their roles in contributing to tree decline and mortality outside of beech bark disease are largely understudied. One such pathogen, Neonectria magnoliae, causes perennial cankers on two native hosts in central Appalachia: Fraser magnolia (Magnolia fraseri) and tulip-poplar (Liriodendron tulipifera). We also recently confirmed N. magnoliae from non-native star magnolia (Magnolia stellata) in West Virginia. Both native hosts occur in the central …


Evaluating The Impact Of Ergonomic Interventions On Reducing Knee Musculoskeletal Disorder Risks During Residential Roof Shingle Installation: A Phase-Level Analysis, Nazia Zerin Jan 2024

Evaluating The Impact Of Ergonomic Interventions On Reducing Knee Musculoskeletal Disorder Risks During Residential Roof Shingle Installation: A Phase-Level Analysis, Nazia Zerin

Graduate Theses, Dissertations, and Problem Reports (ETD)

The prevalence of knee musculoskeletal disorders (MSDs) among roofers due to awkward kneeling postures during shingle installation is a well-recognized concern. While knee-saving interventions like knee savers (KSs) and knee pads (KPs) have shown the potential to reduce MSD risks, their effectiveness across different phases of shingle installation remains unknown. The objective of this study is to assess how interventions of KSs and KPs alleviate the risks of MSDs in the knees during various phases of shingle installation. These phases include (1) reaching for shingles, (2) placing shingles, (3) grabbing a nail gun, (4) moving to the first nailing position, …


Implementation Of A Pilot Quality Improvement Project To Guide The Administration Of Intraoperative Dexamethasone For Postoperative Nausea And Vomiting Prophylaxis In Patients With Diabetes Undergoing Orthopedic Procedures, Brittany W. Hall Jan 2024

Implementation Of A Pilot Quality Improvement Project To Guide The Administration Of Intraoperative Dexamethasone For Postoperative Nausea And Vomiting Prophylaxis In Patients With Diabetes Undergoing Orthopedic Procedures, Brittany W. Hall

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: At a local tertiary care hospital, there was no recommendation to guide anesthesia providers in the administration of intraoperative dexamethasone to patients with diabetes. While dexamethasone is a highly effective antiemetic, it may promote hyperglycemia in patients with diabetes.

Purpose: The purpose of this project was to guide and educate about current recommendations for the administration of dexamethasone for PONV prophylaxis in patients with diabetes.

Intervention: 1) Examined pre-intervention practices of dexamethasone administration. 2) Educated about current and best practices to anesthesia staff. 3) Developed badge buddy cards outlining the guideline. 4) Examined post-intervention practices. 5) Evaluated the effect …


Transition Readiness, Coping, And Psychological Risk And Protective Factors In Adolescents With Type 1 Diabetes, Jennifer Kelleher Jan 2024

Transition Readiness, Coping, And Psychological Risk And Protective Factors In Adolescents With Type 1 Diabetes, Jennifer Kelleher

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: Many adolescents with type 1 diabetes (T1D) find the transition from pediatric to adult healthcare stressful, reporting high levels of diabetes distress and burnout. Although promoting positive coping strategies (primary control, secondary control), and inhibiting negative coping (disengagement) improves health outcomes in youth of transition age, little research has examined how different types of coping relate to transition readiness in T1D. Additionally, it remains unknown what psychological factors predict disengagement coping in adolescents with T1D. Therefore, this study aimed to (1) examine which coping styles predict transition readiness in adolescents with T1D, (2) determine whether diabetes distress mediates …


Sexual Identity And Homophily: The Powerful Role Of Sexual Identity For Romantic Partner Selection, Lee Thorpe Jr Jan 2024

Sexual Identity And Homophily: The Powerful Role Of Sexual Identity For Romantic Partner Selection, Lee Thorpe Jr

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation investigates the role of sexual identity on homophily, and its effects on romantic partner selection. The principle of homophily states that individuals tend to befriend and seek romantic partners who are most similar to themselves based on certain social characteristics (i.e., birds of a feather flock together). The majority of the homophily literature focuses on heterosexual friendships and coupling. Recently, homophily research has included sexual identity in their analyses. However, recent studies have only investigated friendship formation/bonds for lesbians and describing certain racial coupling types for individuals based on their sexual identity. I fill the lacuna in research …


Influence Of Scaling And Root Planing With Minocycline Microspheres On Clinical Outcomes Of Patients With Periodontitis, Nupoor Sandeep Kulkarni Jan 2024

Influence Of Scaling And Root Planing With Minocycline Microspheres On Clinical Outcomes Of Patients With Periodontitis, Nupoor Sandeep Kulkarni

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: Scaling and root planning (SRP) has been established as a “gold-standard” non-surgical initial treatment for periodontitis. Along with SRP, some systemic adjuncts like systemic antibiotics were used in the past to gain maximum benefits of SRP by reducing the need for further periodontal surgeries. Due to some drawbacks of systemic antibiotic use, like “transient antibiotic resistance”, “non-adherence” and “insufficient concentrations in the periodontal pockets to be clinically effective”, there was a shift towards the use of local antibiotic adjuncts to SRP like minocycline, tetracycline, chlorhexidine etc. Minocycline is a semi-synthetic tetracycline derivative which is available in a powder form, …


Implementation Of Provider In Triage Guidelines To Improve Emergency Department Throughput: A Quality Improvement Project, Benjamin Adam Klos Jan 2024

Implementation Of Provider In Triage Guidelines To Improve Emergency Department Throughput: A Quality Improvement Project, Benjamin Adam Klos

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction/Background

Emergency department overcrowding is a national problem that causes adverse effects on patients, providers, and healthcare systems. Locally, wait times can be up to six hours. Emergency department census increases yearly without an increase in physical space.

Purpose

The project aimed to improve throughput and provide quality care to patients in an emergency department waiting room.

Intervention

A provider in triage guideline was written to improve emergency department throughout metrics and guide care.

Methods

Pre- and post-implementation statistics were compared. The Logic model was used to guide project implementation.

Results

Door to provider and arrival to discharge times decreased …


Short Episodes But Fast Friends: Examining The Effects Of Parasocial Relationship Quality On Mediated Intergenerational Contact In Grace And Frankie, Alysse C. Baker Jan 2024

Short Episodes But Fast Friends: Examining The Effects Of Parasocial Relationship Quality On Mediated Intergenerational Contact In Grace And Frankie, Alysse C. Baker

Graduate Theses, Dissertations, and Problem Reports (ETD)

Building on the foundations of intergroup contact theory (Allport, 1954), the parasocial contact hypothesis (Schiappa et al., 2005), and Harwood’s Contact Space (2010), this dissertation advances the existing literature on how intergenerational contact with media characters can improve young adults’ willingness to engage with older adults. Specifically, this study examines the effects of intergroup contact quality on the parasocial contact process. Episodes of the TV sitcom about older adult women, Grace and Frankie, were edited to create both a high contact quality condition and a low contact quality condition. The high contact quality condition was a montage that showed viewers …


Cleaning And Characterization Of Chemical Vapor Deposited Graphene For Nanoelectronic Device Development, Sakib Ishraq Jan 2024

Cleaning And Characterization Of Chemical Vapor Deposited Graphene For Nanoelectronic Device Development, Sakib Ishraq

Graduate Theses, Dissertations, and Problem Reports (ETD)

Nanoelectronic devices based on graphene are a promising technology that combines the sensitivity and specificity of ion and element recognition with the accuracy and precision of electronics. The detection principle is based on the interaction of the target molecules with the nanodevice surface, which generates a measurable electrical signal. In the current study, graphene and its derivatives, synthesis and fabrication of high quality, good uniformity, and low defects graphene have been investigated as they are critical for high-performance and highly sensitive devices. Among many synthesis methods, chemical vapor deposition (CVD), have been used that needs to be transferred from the …


Comparative Analysis Of Chemical Compounds And Metal Contaminants In Medical Grade Versus Over-The-Counter Sodium Hypochlorite Solutions, Abdulrahman Essaedi Jan 2024

Comparative Analysis Of Chemical Compounds And Metal Contaminants In Medical Grade Versus Over-The-Counter Sodium Hypochlorite Solutions, Abdulrahman Essaedi

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction:

Abstract

Endodontic treatment aims to prevent or address apical periodontitis by reducing intracanal bacterial populations to promote tissue healing, requiring thorough debridement and disinfection of the canal space. This study aims to examine the presence of trace metal elements and chemical compounds in over-the-counter (OTC) and medical-grade sodium hypochlorite (NaOCl) solutions.

Method

Over-the-counter NaOCl brands (Clorox® and Great Value®) and medical grade 6% NaOCl solutions (CanalPro® and Chlor-Xtra®) were purchased, stored in amber glass bottles, and tested in triplicate. Each was analyzed using mass spectrometry, identifying 7881 chemical compounds with statistical comparisons via adjusted p-values, fold-change, and heat maps. …


Clinical Significance Of Gutta Percha Variability, Alex R. Pancake Jan 2024

Clinical Significance Of Gutta Percha Variability, Alex R. Pancake

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction: The production of gutta percha points as root canal therapy filling materials vary from hand processing to machine processing with a range of acceptable levels of error (tolerance). Similarly, endodontic files manufactured to complement corresponding gutta percha points exhibit specified levels of tolerance. Investigations into the consistency among manufacturers of files and gutta percha points is limited. The aim of this study is to see how variability in apical gauge and taper of gutta percha points affected the clinical performance during cone try in. The null hypothesis of this study is that there is no difference in two gutta …


Dentin-Sealer Bond Strength. A Review: An In-Vitro Comparison Between Guttaflow 2 ®, Endosequence Bc High Flow ®, Tubli-Seal ®, Sealapex ®, And Ah Plus Jet ® Sealers., Zied Diab Jan 2024

Dentin-Sealer Bond Strength. A Review: An In-Vitro Comparison Between Guttaflow 2 ®, Endosequence Bc High Flow ®, Tubli-Seal ®, Sealapex ®, And Ah Plus Jet ® Sealers., Zied Diab

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction: One objective of non-surgical endodontic therapy is the formation of a hermetic seal with elimination of any portal of entry of bacteria and their byproducts into the root canal space from periapical tissue. Extensive research has been conducted to determine ideal endodontic sealers. Bioceramic sealers have risen to prominence due to reported decreased shrinkage, less toxicity, and superior bond strength to root dentin compared to zinc oxide eugenol, calcium hydroxide, and resin-based sealers. GuttaFlow2®, a new sealer on the market, is composed of calcium silicate in combination with gutta-percha particles. Researchers from Coltene (Altstätten, Switzerland), the manufacturer of GuttaFlow2® …


Slope Stability Below Historic Pre-Law Mine Benches In The Northern Coalfields Of West Virginia, Muhammad Ali Jan 2024

Slope Stability Below Historic Pre-Law Mine Benches In The Northern Coalfields Of West Virginia, Muhammad Ali

Graduate Theses, Dissertations, and Problem Reports (ETD)

ABSTRACT

Slope stability below historic pre-law mine benches in the northern coalfields of West Virginia

Muhammad Ali

Slope failures and landslides are commonly occurring geohazards in the state of West Virginia and in the Appalachian region due to weak geologic strata, steep slopes, a humid climate, geologically recent river incision, and human landscape modifications. Historic surface mining has resulted in large-scale landscape alterations. Surface mining conducted before the Surface Mine Control and Reclamation Act (SMCRA) of 1977 did not require reclamation to approximate original contour; as a result, remnant highwalls and mine benches are common throughout the state and region. …


Exploring Physical Activity Promotion And Implementation Within Inclusive Post-Secondary Education Programs: A Mixed-Methods Design, Shannon P. Zimmerman Jan 2024

Exploring Physical Activity Promotion And Implementation Within Inclusive Post-Secondary Education Programs: A Mixed-Methods Design, Shannon P. Zimmerman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Adults with intellectual and developmental disabilities (IDD) exhibit lower physical activity levels compared to their non-disabled counterparts, with only 23% of U.S. adults with IDD engaging in the recommended 60 minutes per day of moderate-to-vigorous physical activity. Inclusive Post-Secondary Education (IPSE) programs in the U.S. offer an opportunity to promote physical activity and address the critically low physical activity levels. Few IPSE programs have formalized physical activity courses, warranting an evaluation and development of the national curriculum in this area. This study expands on previous work by examining current physical activity promotion strategies at both the program and course levels. …


Implementation Of Bayesian Statistics To Answer Diverse Engineering Questions: Applications In Cancer Immunology And Engineering Education, Anika C. Pirkey Jan 2024

Implementation Of Bayesian Statistics To Answer Diverse Engineering Questions: Applications In Cancer Immunology And Engineering Education, Anika C. Pirkey

Graduate Theses, Dissertations, and Problem Reports (ETD)

Quantitative Systems Pharmacology (QSP) refers to a mechanistic modeling approach used for assessing potential therapeutics by linking the molecular and cellular level mechanisms of the disease and therapeutic to the system-wide dynamics and clinical endpoints relevant to the disease. Although the field of QSP is still in its relative infancy, the mathematical methodology employed to predict the kinetics of these systems are not new and can be applied to a wide variety of systems. For instance, similar to QSP’s goal of guiding the development of novel therapeutics for various disease states, there exists a need to develop novel interventions in …


Hepatic Mrna Expression Of Innate And Adaptive Immune Genes In Beef Steers With Divergent Residual Body Weight Gain, Deborah Ologunagba Jan 2024

Hepatic Mrna Expression Of Innate And Adaptive Immune Genes In Beef Steers With Divergent Residual Body Weight Gain, Deborah Ologunagba

Graduate Theses, Dissertations, and Problem Reports (ETD)

Immune system function is critical to maintaining the health and increasing productivity of cattle, affecting both their growth and their disease resistance. In an efficient immune system, the liver assumes an integral function in detoxification and metabolic processes and contributes substantially to overall production and immunity. In this study, we evaluated the hepatic mRNA expression of genes involved in innate and adaptive immunity in crossbred beef steers with either a positive or negative residual body weight gain (RADG). Positive-RADG beef steers (n = 8; RADG = 0.76 kg/d) and negative-RADG beef steers (n = 8; RADG = -0.64 kg/d) were …


Characterizing 4,4’-Methylene Diphenyl Diisocyanate Exposure In Primary Human Epidermal Keratinocytes: A Multi-Omics Approach, Brandon F. Law Jan 2024

Characterizing 4,4’-Methylene Diphenyl Diisocyanate Exposure In Primary Human Epidermal Keratinocytes: A Multi-Omics Approach, Brandon F. Law

Graduate Theses, Dissertations, and Problem Reports (ETD)

Exploring the routes of exposure and biological fate of 4,4’-methylene diphenyl diisocyanate (MDI) has been a challenge for many years. Occupational exposure to MDI can result in the development of occupational asthma (MDI-OA) which results in loss of productivity, large economic costs, and costs to the individual worker. Initially, it was thought that respiratory exposure to MDI was the most likely route leading to MDI-OA. Industries utilizing MDI have been successful at controlling airborne concentrations according to industrial hygiene assessment and newly diagnosed cases of MDI-OA decreased and plateaued. New research suggests that dermal exposures to MDI may explain this …


Pilot Quality Improvement Project To Update Surgeon Preference Cards Of A Community Hospital's Orthopedic Service, Jessica R. Mitchell Jan 2024

Pilot Quality Improvement Project To Update Surgeon Preference Cards Of A Community Hospital's Orthopedic Service, Jessica R. Mitchell

Graduate Theses, Dissertations, and Problem Reports (ETD)

Abstract

Implementation of a Pilot Quality Improvement Project to Update Surgeon Preference Cards

of a Community Hospital’s Orthopedic Service

Jessica R. Mitchell

Problem Statement: Over time, surgeons change preferences for surgical equipment, and their preference cards need updating. Failure to update preference cards leads to impaired staff communication, opening of unnecessary equipment, excess waste, increased cost to patients and facilities, and potential threats to patient safety.

Background: Members of the orthopedic surgical team in a community hospital in suburban West Virginia wanted to establish a process to regularly update outdated surgeon preference cards (SPC) for several common orthopedic procedures. The …


Genetic Knowledge And Causal Beliefs: Implications For Health Behavior In Clinical And Non-Clinical Samples, Jamey T. Brumbaugh Jan 2024

Genetic Knowledge And Causal Beliefs: Implications For Health Behavior In Clinical And Non-Clinical Samples, Jamey T. Brumbaugh

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objective: As the genomic era in healthcare continues to surge, it is vital to examine genetically-related psychological concepts, such as genetic knowledge and genetic causal beliefs, in genetically relevant clinical groups. Parents /caregivers of children born with cleft lip and/or palate represent a population whose knowledge and beliefs about genetics may be influenced by their frequent utilization of genetically-related healthcare services (e.g., genetic testing and genetic counseling). To date, little is known about how such beliefs vary across disease types. Even less is known regarding how disease-specific genetic causal beliefs relate to perceived behavioral control for disease development. Method: A …


Taking The Red Pill: A Content Analysis Of Ambivalent Sexism And Precarious Manhood In Alpha Male Podcasts, Madalen Lea Fields Jan 2024

Taking The Red Pill: A Content Analysis Of Ambivalent Sexism And Precarious Manhood In Alpha Male Podcasts, Madalen Lea Fields

Graduate Theses, Dissertations, and Problem Reports (ETD)

Podcasts have become increasingly popular across various platforms (e.g., Spotify or Apple podcasts). A more recent trend is the emergence of “alpha male” podcasts. The goal of these podcasts is to instruct young men how to stop being “betas” and on achieving “alpha male” status. These podcasts are a subset of the manosphere, a term used to describe media focused especially on hegemonic masculinity, which is characterized by their promotion of misogynistic beliefs and sexist rhetoric. Drawing upon social science research, three forms of sexism (i.e., ambivalent sexism, precarious manhood and violence against women) serve as analytical frameworks for understanding …


Low Power Remote Sensing System For Ceramic Thermocouples, Syed Khaleduzzaman Jan 2024

Low Power Remote Sensing System For Ceramic Thermocouples, Syed Khaleduzzaman

Graduate Theses, Dissertations, and Problem Reports (ETD)

The ceramic thermocouple sensor is a promising alternative to traditional thermocouple due to their corrosion resistance and cost-effective manufacturing. Currently, no electronic Interface or Integrated Circuit solution is commercially available which can be used to interface these thermocouples at low-cost and low power for accurate temperature measurement. An electronic system is needed to use these ceramic sensors which consumes less amount of power for an extensive period of time with remote monitoring option.

This thesis proposes a low-power electronic remote sensing system that works for ceramic thermocouples. The system consists of three parts. They are battery-operated sensor node electronic circuit, …


Examination Of The Time Course Effects Of Electronic Cigarettes On The Thoracic Aorta, Madison Robinson Jan 2024

Examination Of The Time Course Effects Of Electronic Cigarettes On The Thoracic Aorta, Madison Robinson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Endothelial dysfunction is a critical early marker of the pathogenesis of cardiovascular disease and a pathological biomarker in cigarette smokers. Emerging evidence finds similar cardiovascular risks resulting from electronic cigarettes (E-cig) as that seen from smoking. Logically, the time or length of exposure to E-cigs will likely influence the development of vascular dysfunction, however, the length of exposure that causes permanent damage is unknown. The goal of this study was to determine the potential window of chronic E-cig exposure that results in vascular dysfunction, which is marked by endothelial dysfunction, microvascular dysfunction, and stiffening of arteries. Based on prior chronic …


Experimental And Chemical Modeling Of Applied Dc Electric Field Induced H2 – Air Axisymmetric Laminar Co-Flow Diffusion Flames With Low Carbon Impurities, Susith Dilshan Pathmasiri Gunamuni Halowitage Jan 2024

Experimental And Chemical Modeling Of Applied Dc Electric Field Induced H2 – Air Axisymmetric Laminar Co-Flow Diffusion Flames With Low Carbon Impurities, Susith Dilshan Pathmasiri Gunamuni Halowitage

Graduate Theses, Dissertations, and Problem Reports (ETD)

The effect of externally applied DC electric fields on flame structure was investigated in a stationary atmospheric axisymmetric laminar H2–Air flame with less than 100 ppm carbon equivalent impurities. Flame OH chemiluminescence signals were recorded using a UV-sensitive CCD array as a function of voltage (+10 to -10 kV) applied to a stainless-steel ring electrode placed around the burner nozzle. Changes in chemiluminescence signal are reported as a function of electrode height above the burner, airflow, and fuel composition. Significant changes in OH* distributions were observed for voltages below -5 kV. Under optimum conditions, the height of the …


Development Of Probabilistic Dynamic Model Building And Bayesian Machine Learning Approaches, Samuel Oladayo Adeyemo Jan 2024

Development Of Probabilistic Dynamic Model Building And Bayesian Machine Learning Approaches, Samuel Oladayo Adeyemo

Graduate Theses, Dissertations, and Problem Reports (ETD)

Abstract

Development of Probabilistic Dynamic Model Building and Bayesian Machine Learning Approaches

Samuel Adeyemo

The recent years have seen a tremendous increase in the use of artificial intelligence (AI) and machine learning (ML) for the development of data-driven mathematical models needed for performing real-time optimization, model-based control, performance optimization, dynamic data reconciliation, and process performance monitoring. However, the development of data-driven models is faced with some challenges including lack of model interpretability, sensitivity of algorithm to noise in training data, limited extrapolation capabilities and violation of conservation laws. Drawing motivation from these existing gaps, this work aims to develop robust …


Development Of Dynamic Mass-Energy-Thermodynamics Constrained Hybrid Neural Network Models For Process Systems Applications, Angan Mukherjee Jan 2024

Development Of Dynamic Mass-Energy-Thermodynamics Constrained Hybrid Neural Network Models For Process Systems Applications, Angan Mukherjee

Graduate Theses, Dissertations, and Problem Reports (ETD)

First-principles models can provide very good predictions even for cases when there are no data at all, or data are limited in certain range of operating conditions, or for cases where data collection is infeasible. However, the development of accurate first-principles models for complex nonlinear dynamic systems can be time consuming, computationally expensive, and may be infeasible for certain systems due to lack of sufficient knowledge (information). It is also challenging to adapt first-principles models for time-varying systems. Furthermore, it can be difficult, if not impossible, to develop accurate models for some complex phenomena that are poorly understood. On the …