Digital Commons Network^™

Nutrient Pollution And Chlorophyll-A As A Precursor To Harmful Algal Blooms And Cyanotoxins In Rehabilitated Machado Lake, California, Michael E. Shiang

Walden Dissertations and Doctoral Studies

Algal blooms result in the formation of cyanotoxic conditions in a freshwater lake causing severe detrimental impacts to community and public health. Nitrogen, phosphorous, and ammonia stimulate the growth of phytoplankton biomass and algae, as measured by chlorophyll. This retrospective quantitative research study, grounded in the socioecological model, examined the relationship between nutrient pollutants and chlorophyll-a (Chl-a) that forecast harmful algal blooms, a precursor to cyanotoxins. A former impaired lake, Machado Lake in California, provided an ideal setting to assess relationships among nutrient indicators and Chl-a post-lake rehabilitation. Correlation and multiple regression analyses were performed to determine if a relationship …

Association Between Antidepressant Adherence And Major Depressive Disorder Complications, Philip Lisinge

Walden Dissertations and Doctoral Studies

Despite evidence that antidepressants are more effective at treating major depressive disorder (MDD) symptoms, there is growing evidence that MDD management is still hampered by nonadherence to antidepressant treatment regimens. Researchers have suggested that MDD, if untreated, might lead to MDD-related complications, but other researchers have argued that adherence to antidepressants can lead to these same MDD-related complications. This quantitative cross-sectional study used primary data collected from 298 volunteers to examine the association between MDD-related complications and antidepressant adherence to clarify these diverging opinions. The study’s objective was to provide evidence to accept or reject the premise that antidepressant adherence …

High School Teachers’ Experiences And Perceptions Facilitating Student Discourse And Collaborative Structures For English Language Learners In Biology, Chrissy Ann Brouwer

Walden Dissertations and Doctoral Studies

The problem that was addressed in this study was that the academic needs of English Language Learners (ELLs) were not being met in biology classes in high schools in the local district because teachers were not consistently facilitating instruction using the required strategies of student discourse and collaborative structures. The purpose of this qualitative study was to explore teachers’ successes, challenges, and need for supports when using the required strategies with their ELLs. Knowles’ theory of andragogy and Shulman’s theory of pedagogical content knowledge guided this study examining how the adults’ learning of the required strategies impacted their ability to …

Generalized Anxiety Disorder Symptoms Stratified By Age In Primary Care, Robin E. Mccoy

Walden Dissertations and Doctoral Studies

Little is known as to the age-related presentation of somatic complaints of those diagnosed with generalized anxiety disorder in primary care settings. A retrospective medical records review sought to identify the affective symptoms of generalized anxiety disorder (GAD) by age as recorded by primary care providers and to test the association of these symptoms by age. Guided by Engle’s (1977) biopsychosocial (BPS) model, a large administrative claim database system was used to derive a sample of 1,336, including 500 patients diagnosed with generalized anxiety disorder between 2018 to 2021. Binary logistics regression, one-way ANOVA, chi-square, correlation, and logistical regression with …

Impact Of Minority Incarceration On The Family Unit, Huey S. Ratcliff

Walden Dissertations and Doctoral Studies

The economic impact of incarceration on minority family units has both secondary and third-order effects on the minority family unit when a family member is incarcerated, which is exacerbated when the incarcerated family member was both the primary breadwinner and a parent. The purpose of this study was to identify the social and economic effects incarceration has on minority families. The study addressed how minority families adjust to changes in organic composition and how the minority family copes with increased debt and loss of earning potential. Further, the study sought to answer how minority families overcome economic hardship when the …

Social Networks And Self-Efficacy Among Hawaiian Homeless, Blake Shavers

Walden Dissertations and Doctoral Studies

AbstractHomelessness affects over half a million people in the United States and millions worldwide. While permanent supportive housing initiatives like Housing First have successfully improved homeless wellbeing, recent research has shown that housing alone is not a solution; it requires add-on programming to assist in mitigating the causal factors. The purpose of this study was to explore and describe the social networking and self-efficacy of currently homeless and those who have successfully transitioned to supportive housing in the unique social and geographical environment of O’ahu, Hawai’i. A phenomenological study design using criterion sampling for semi structured interviews of four houseless …

Mediators Between Job Stress And Health Quality Of Life Among Adults With Irritable Bowel Syndrome, Aida M. Benitez-Rexach

Walden Dissertations and Doctoral Studies

Irritable bowel syndrome (IBS) is a functional gastrointestinal affliction that affects millions around the globe, impacting health-related quality of life (HRQoL). The biopsychosocial model, Folkman and Lazarus’ transactional model of stress, Leventhal’s common sense model of self-regulation health and illness, and Bronfenbrenner’s human ecology theory are relevant to conceptualize interactions among environmental factors, biopsychosocial responses, and health-related quality of life (HRQoL). This quantitative, cross-sectional, complex correlational study sought to provide more understanding of how and whether IBS symptoms of pain, cognitive functioning, and interpersonal functioning serve as mediators between work stress and HRQoL. A total of 133 English-speaking volunteers from …

Staff Education To Promote Probiotic Breastfeeding Therapy, José Diaz

Walden Dissertations and Doctoral Studies

Preterm birth is the leading cause of death in children under 5. In addition, there are 22 million babies born underweight each year which also contributes to the infant mortality rate. Some reasons for the inability to thrive and survive are the infants' immature system, allostatic load inadaptability, and undiversified and underdeveloped microbiota. Human breast milk (HBM) provides lifesaving nutrients, which prevents necrotizing enterocolitis and mortality. In addition, probiotic supplementation helps reduce late-onset sepsis, morbidities, and mortality. A literature review provided substantial evidence that HBM and probiotics can improve an infant's microbiota, thus improving thrivability and survivability. Probiotics offset the …

Clinicians' Perceptions Of Telehealth Services During The Covid-19 Pandemic In Virginia, Johnetta Hill Guishard

Walden Dissertations and Doctoral Studies

The onset of COVID-19 introduced unprecedented changes to how U.S. public health services were delivered. Many public and private agencies faced mandatory closures, social distancing mandates, and rapid transitions to telehealth interventions and treatment. Mental health clinicians witnessed disruptions in continuity of care and an increase in mental health risks overall. Although some studies have been conducted to survey clinicians’ perceptions of the usefulness and ease of use of technology-based interventions, knowledge about mental health clinicians’ experiences and perceptions in Virginia was sparse. The purpose of this generic qualitative study was to explore how mental health clinicians in Virginia described …

Traditional Healing And Biomedicine Use In Urban American Indians Living With Diabetes, Elin Elise Kambuga

Walden Dissertations and Doctoral Studies

The purpose of this interpretative qualitative study was to describe influences that affect the use of traditional healing and biomedical health services for type 2 diabetes to help health educators develop more culturally competent diabetes education programs for urban American Indian/Alaska Native (AI/AN) communities in the United States. The theoretical framework used for this study was the social ecological model (SEM). Using the SEM, the research questions were crafted to explore experiences of participants connected to personal, interpersonal, community, institutional, policy, and educational factors that influenced the use of traditional healing and biomedical health services. Urban AI/AN adults living in …

The Association Between Working Habits And Hypertension Among First Generation African Immigrants, Olalekan Kilo

Walden Dissertations and Doctoral Studies

Even though hypertension affects people of all races, it is more prevalent among African Americans. However, recent research has revealed that the prevalence of hypertension is progressively increasing across Africa. African immigrants in the United States are the least-studied immigrant group prone to health inequalities when compared to their African American counterparts. To help bridge this gap, a secondary data analysis of a cross-sectional study was conducted to investigate the association between working habits (hours worked, diet at work), length of stay in the United States, and hypertension rates for first-generation African immigrants residing in the United States. The study …

Title Ix And "Menstruation Or Related Conditions", Marcy L. Karin, Naomi Cahn, Elizabeth B. Cooper, Bridget J. Crawford, Margaret E. Johnson, Emily Gold Waldman

Faculty Scholarship

Title IX protects against sex-based discrimination and harassment in covered education programs and activities. The Biden Administration's recently proposed Title IX regulations do not, however, include discrimination on the basis of menstruation or related conditions as a form of discrimination based on sex. This comment on the proposed regulations explains why the regulations should include conditions related to menstruation and recommends changes for how to do so.

Transplanted Appalachians’ Perspectives Of Culturally Relevant Topics/Texts And How These Topics/Texts Aid In Their Reading Comprehension, Kathryn E. H. Smith

Theses and Dissertations--Curriculum and Instruction

The purpose of this research study was to understand Transplanted Appalachians’ perspectives of culturally relevant topics/texts and how these topics/texts aid in their reading comprehension. This culturally relevant study was framed using Vygotsky’s (1978) sociocultural theory, Barton and Hamilton’s (1998) literacy as a social practice, and Rosenblatt’s (1994) transactional theory. Research participants included five transplanted Appalachian adults from the Central Appalachian Region. The research methods included one introductory interview, four think-alouds, four post think-aloud interviews, and four Cultural Relevance Rubrics. Results from the data sources revealed the participants strongly related to six cultural themes including: community, authentic Appalachian experiences (e.g., …

Addressing A Cohort Discrepancy Among Ninth-Grade Students At A Rural/Suburban High School, Bryley Keaton Murphy

Theses and Dissertations--Educational Leadership Studies

Ninth grade is a critical period where some children experience academic and social growth, while others struggle to navigate their new context, leading to reduced outcomes at school and worsened physical/mental health (Benner & Graham, 2007; Rice, 2001). This mixed-methods action research (MMAR) study addressed how professional practice changes could better support students during this foundational period. Quantitative data was collected from school databases to compare the rate of student success and identify demographic discrepancies, while qualitative data was used to identify possible causes. These data were then integrated to create insightful meta-inferences into the problem of practice. From these …

Investigating The Relationship Between Empowerment And Secondary Science Teachers’ Technology Integration Knowledge, Jane Elizabeth Walsh

Theses and Dissertations--Educational Leadership Studies

Empowered teachers believe they can improve their work conditions and positively impact student outcomes. Likewise, teachers with technology integration knowledge can effectively use technology to enhance lessons and improve student learning. This quantitative correlational study investigated teachers’ empowerment, teachers’ technology integration knowledge, and associations between empowerment and technology integration knowledge. Two hundred fourteen randomly selected high school science teachers from across the United States responded to a survey intended to measure empowerment and technology integration knowledge. The teachers' average responses indicate that teachers generally agree with statements surrounding empowerment (M = 3.93, SD = 0.54) and technology integration knowledge …

Embracing Rural First-Generation College Student Scholar Identity: Wading Waist Deep In Unfamiliar Waters, Robert Hayes

Theses and Dissertations--Educational Policy Studies and Evaluation

First-generation college students do not persist to degree completion at the same rate as their continuing generation peers. There is a wide range of research focusing on the challenges and opportunities that first-generation college students experience, ranging from pre-matriculation factors, the transition period to college, and throughout the undergraduate years. The achievement gap, in terms of persistence to degree, has been a consistent focus of research as first-generation students routinely do not earn college degrees at the same rate as their continuing generation peers. This research takes a holistic approach to understanding the first-generation college student experience that does not …

Effects Of Constant Load Exercise On Oxygen Consumption And Knee Joint Mechanics In Young Adults, Mariana Victoria Jacobs

Theses and Dissertations--Kinesiology and Health Promotion

The rate of obesity and its adverse health consequences have continued to rise in the past several decades. Aerobic constant load exercise is recommended to reduce excess body mass, however the effects of constant load exercise on oxygen consumption (VO2) and knee joint mechanics are inconsistent when varying weight-status strategies are employed. The purpose of this study was to assess the influence of different weight classification strategies on VO2 and knee joint mechanics during constant load exercise. Participants walked on an instrumented treadmill at a self-selected speed for 30-minutes while gait mechanics and VO2 measures were determined. Between-group differences were …

Reliability And Validity Of A Commercial Running Power Meter To Indicate Metabolic Workload During Endurance Running, James Harris Hudgins Iii

Theses and Dissertations--Kinesiology and Health Promotion

Commercial running power (RP) meters may provide endurance runners and coaches with improved precision for monitoring running intensity. Cyclists rely upon the relationship between cycling power and metabolic demand to regulate physiological intensity during training and racing, independent of changes in the physical environment (e.g., terrain, wind). Research demonstrates strong reliability and validity for a specific RP meter to indicate metabolic demand within controlled running conditions. However, several potential influences on this relationship have not been investigated. Therefore, four studies were conducted with the following aims:

- Study 1: Determine the inter-limb reliability and validity of a single-limb-based RP meter …

The Effects Of Cannabidiol Cream On Soreness And Performance After Exercise In Untrained Individuals, Joseph Thomas Pastina

Theses and Dissertations--Kinesiology and Health Promotion

Background: Exercise-induced muscle damage (EIMD) results from unaccustomed exercise and can lead to delayed onset muscle soreness (DOMS). Impairments associated with EIMD and DOMS can result in moderate-to-severe discomfort and hindered performance. Recently, a compound derived from the cannabis plant, cannabidiol (CBD), has been used as a recovery tool for EIMD and DOMS. Despite the rising popularity of CBD products, their effectiveness in mitigating EIMD and DOMS is unknown. Purpose: The purpose of the present study was to investigate the effects of CBD cream on DOMS and performance after an intensive lower-body exercise protocol. In addition, the study sought to …

Methodolocical Concerns Of Using Global Positioning System Technology To Assess American Football Competition Demands, Tyler Lindon

Theses and Dissertations--Kinesiology and Health Promotion

Despite its popularity, there is a lack of research describing the physical demands of American Football. This is surprising when considering the popularity of the use of global positioning systems (GPS) within this specific sporting environment. The aim of the present study was to utilize a novel methodology to describe the physical demands of American football players by play type (run vs. pass) using a play-by-play analysis of global positioning system (GPS) outcomes. Fifty Division I collegiate American football players (Age: 19.8 ± 1.1 yr, Height: 189.3 ± 4.4 cm, Body mass: 86.1 ± 5.8 kg) wore portable GPS monitors …

3-Dimensional Muscle Constructs: Using Hydrogels In Order To Model The Effects Of Exercise In Disease Conditions, Mark Mchargue

Theses and Dissertations--Biomedical Engineering

Currently, there is no standard in vitro model for studying the effects of mechanical stimulation on muscle in type II diabetes. Existing models primarily utilize electrical stimulation, which does not fully recapitulate the effects of exercise. In this thesis, we create a standardized in vitro model of murine muscle that can recapitulate the benefits seen in exercise when mechanically stimulated. Moreover, we show that a type II diabetes environment has similar effects on the muscle in vitro as well as in vivo.

A Wearable Fiber-Free Optical Sensor For Continuous Measurements Of Cerebral Blood Flow And Oxygenation, Xuhui Liu

Theses and Dissertations--Biomedical Engineering

Wearable technologies for continuous monitoring of cerebral hemodynamics in freely behaving subjects not only advance our understanding of cognitive processing and adaptive behavior, but also provide vital information for diagnosis and therapeutic assessment of cerebral diseases associated with hypoxia/ischemia. Wearable near-infrared diffuse optical techniques have been used at the bedside to probe deep cerebral hemodynamics, including near-infrared spectroscopy (NIRS) for cerebral oxygenation measurement and diffuse correlation spectroscopy (DCS) for cerebral blood flow (CBF) measurement, respectively. However, most systems are relatively large and expensive, and use rigid fiber-optic probes that significantly constrain subject’s movement. A novel, wearable, fiber-free diffuse speckle contrast …

Quantitative Microbial Risk Assessment (Qmra) For Urban Stormwater Reuse After Treatment Through A Bioretention System, Isaac Oluk

Theses and Dissertations--Civil Engineering

Bioretention, also referred to as a stormwater biofilter, is an extensively used low-impact development technology for both stormwater management and water quality gains. However, little attention has been paid to the acceptability and uncertainty of human health risks associated with the treatment performance of bioretention filter media, and non-potable water reuse scenarios to guide decision-making and system design. This study uses bioretention mechanistic modeling paired with quantitative microbial risk assessment (QMRA) under uncertainty to evaluate human health risks from two reference pathogens – Campylobacter jejuni and Cryptosporidium. Consumption of irrigated green salad, consumption of raw green salad washed with effluent, …

Prediction Of Chlorine And Disinfection Byproduct Concentration In Water Distribution Systems Using Kypipe And Tthm Regression Models: Application To Two Systems In Kentucky, Yogesh Gautam

Theses and Dissertations--Civil Engineering

The main objective of this research is to study if the hydraulic and water quality models can be used for water quality analysis of chlorine decay and TTHM formation at various locations across a water distribution system. This is particularly important because it is not always easy or economical to take multiple field samples and analyze them in the laboratory. In this study, models of two different water distribution systems (one more urban and efficiently managed system located in a relative flat topography, and other more rural and less efficiently managed system located in a mountainous topography) were developed in …

Principal Leadership Practices At Kentucky High Schools Administering The Pisa For Schools: Leading For Global Competitiveness, Marjorie L. Johnson

Theses and Dissertations--Education Sciences

Since launching Sputnik in 1957, the United States education system has been trying to climb to the top of the international education rankings. The Organisation for Economic and Co-operative Development (OECD) began analyzing how well school systems prepared students to compete in the global economy in 2000. The OECD uses the Programme for International Student Assessment (PISA). U.S. students rank at or near the OECD averages in reading and science but consistently perform below the OECD average in mathematics. In addition to the PISA, the OECD released the PISA for Schools, which provides PISA data at the school level.

In …

Effects Of Confinement On Ionic Liquids And Deep Eutectic Solvents For The Design Of Catalytic Systems, Electrochemical Devices, And Separations, Andrew Drake

Theses and Dissertations--Chemical and Materials Engineering

Confinement of ionic liquids (ILs) and deep eutectic solvents (DESs) within mesoporous materials such as silica helps to control the local environment within the pores for applications such as catalysis, electrochemistry, and absorption. Silica thin films with 2.5 and 8 nm pores and micron-sized silica particles with pore diameters of 5.4 and 9 nm were synthesized to study the effect of nanoconfinement on ILs 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF₆]), 1-butyl-3-methylimidazolium chloride ([BMIM][Cl]), and DESs reline and ethaline (choline chloride and urea or ethylene glycol). Silica thin films with vertically aligned, well ordered, and accessible pores were synthesized via the evaporation-induced …

Developing Pedagogical Content Knowledge As Communal Practice: A Case Study Of Chemistry Graduate Teaching Assistants, Walker Bryan Mask

Theses and Dissertations--Education Sciences

Learning does not only happen during dedicated instructional time, which also applies to learning how to teach. Teachers can reflect on their practice while working to continue to improve and develop their teaching skills. In addition to self-reflection, teachers can also learn from their colleagues to experiment with new practices and take others’ teaching knowledge into their repertoire. Understanding how these two processes function can lead to developments in teacher education and professional development, specifically for initiatives that seek to promote collaboration among teachers. Post-secondary educators in particular can benefit from collaborative and reflective practices to improve their teaching, especially …

Together Now, Alfonso Zapata

Theses and Dissertations--English

Together Now is a collection of poems by Alfonso Zapata, with work written between 2021 and 2023 at the University of Kentucky. This thesis contains poems which examine the close relationship between families, art, and the histories each contain. These poems use these subjects in order to illustrate the emotional and physical impact communities have upon those who live in them; art can evolve a person, shape them in beautiful ways, and give us the ability to process tragedy together; on the other end of the spectrum, societal neglect, environmental crisis, and food insecurity can rip these communities apart potentially …

Emerging Hues: Essays From The Teneral Stage, Lucy Jayes

Theses and Dissertations--English

This collection of essays features work created and revised over two years in the Masters of Fine Arts in Creative Writing Program. They reflect a period of intense evolution in the author’s life and delve into topics of modern-day motherhood and cycles of intimate partner violence.

From Jane Austen To Meghan Markle: The Persistence Of British Imperialism In White Popular Feminism, Kathryn M. Kohls

Theses and Dissertations--English

This dissertation traces the persistent threads and values of white womanhood from the nineteenth-century British Empire to modern American popular culture. The figure of the white woman was significant to upholding colonialism and empire in the literary mass media and culture of the nineteenth century, and I argue that this figure continues to be used in popular media and online content today to surreptitiously uphold white supremacy and obscure race and gender inequalities. This dissertation will explore the overlaps between nostalgia, historical revisionism, white womanhood, white supremacy, and white feminism in modern American popular culture. The connections between, and the …