Digital Commons Network^™

Aster Remote Sensing Satellite Imagery For Regional Mineral Mapping In The Mcmurdo Dry Valleys, South Victoria Land, Antarctica, Khurram Riaz, Amin Beiranvand Pour, Jabar Habashi, Aidy M. Muslim, Iman Masoumi, Ali Moradi Afrapoli, Mazlan Hashim, Kamyar Mehranzamir, Farshid Sattari

Mining Engineering Faculty Publications

The McMurdo Dry Valleys (DVs) of South Victoria Land, Antarctica, constitute the largest ice-free region on the continent and one of Earth’s most Mars-analog environments. Their hyper-arid polar desert conditions offer a unique setting for investigating surface weathering and mineralogical processes under extreme climates. This study presents the first regional-scale mapping of alteration and crystalline weathering minerals across the McMurdo DVs. It uses Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) multispectral data; visible and near-infrared (VNIR) and shortwave infrared (SWIR) bands were analyzed through a Spectral Hourglass Workflow, endmember extraction, and spectral unmixing with Matched Filtering (MF) and Constrained …

Clinical And Biochemical Effects Of Intra-Articular Autologous Conditioned Serum And Triamcinolone In An Equine Model Of Synovitis, Ana Velloso Alvarez, Anne Wooldridge, Fred Caldwell, Sandra Zetterström, Bruno C. Menarim, Taylor J. Towns, Emily C. Graff, Lindsey Boone

Veterinary Science Faculty Publications

Synovitis is a key contributor to the development of OA, and early modulation of the synovial environment may help limit downstream cartilage damage. This study compared the clinical and biochemical effects of intra-articular triamcinolone acetonide (TA) and autologous conditioned serum (ACS) in an equine model of IL-1β–induced synovitis. Six healthy adult horses were used in a crossover design involving five groups: PBS (negative control), IL-1β (positive control), IL-1β + ACS, IL-1β + TA, and an exploratory ACS-alone group administered post hoc to isolate its effects without IL-1β interference. Both TA and ACS mitigated inflammation through distinct profiles. TA was superior …

Characterization Of Full Bridge Strain Transducers For Haulage Equipment Payload Distribution Monitoring, Jean-Pierre Strydom, Steven Schafrik, Zacharias Agioutantis, Matthew J. Beck, Joseph Sottile

Mining Engineering Faculty Publications

Creating a dependable approach for identifying both the mass of a shuttle car and how material is distributed in it removes the need for equipment operators to manually engage the flight chain. The quantification of environmental and installation conditions and the extent of influence considering their combined contribution towards inaccurate or exclusive measurements are to that degree limited. This experimental study investigated how two different strain transducers—installed in a force-shunt configuration—respond to thermo-mechanical loads when used to determine load distribution and position. Initial observations indicated that thermal effects at the installation site contributed to measurement inaccuracies or exclusive readings. The …

Investigating Intersectionality: How Multiple Marginalized Identities And Social Perceptions Of Victims Influences The Efficacy Of Panic-Defense Narratives In Bathooms, Demitri James Aguilar

Theses and Dissertations--Psychology

Despite transgender Women of Color being the main victims of violent victimization and panic-narrative cases, very little research has investigated how race/ethnicity might impact perceptions of violence or the influence of panic-narratives. Thus, the current experiment (N = 1275) examined the social and legal ramifications of using panic-narratives against transgender and cisgender women of color (Black vs. Latino vs. White) in bathroom victimization contexts. The predictions were partially supported. Regardless of racial identity, the justification of transgender (versus cisgender) victimization via panic-narratives produced more anti-victim (e.g., increased victim guilty verdicts, sentencing, victim culpability, perceived deception, and threat) and prodefendant outcomes …

Brief Exposure Therapy With Exercise For Ptsd: A Pilot Study Using Single Case Experimental Design, Troy J.J. Hubert

Theses and Dissertations--Psychology

Posttraumatic stress disorder (PTSD) is a common and often disabling psychiatric disorder associated with an increased risk of multiple mental and physical health conditions. Exposure therapy is a gold standard treatment for PTSD, but attrition rates and treatment response are notable limitations. Animal and human research collectively indicate that aerobic exercise can enhance preclinical and experimental models of exposure by improving consolidation of fear-extinction memories. To date, only one clinical trial has attempted to translate exercise augmented exposure therapy for PTSD. The current study is an open-label pilot clinical trial aiming at gauging the effectiveness of a brief eight-session PTSD …

Three Essays On Extreme Weather, Agricultural Productivity, And Water Resources, Munib Inam

Theses and Dissertations--Agricultural Economics

As extreme weather events become more frequent and more intense, understanding their effects becomes increasingly important. This dissertation examines those effects and related policy questions across three essays.

The first essay demonstrates that methodological choices in weather data construction can meaningfully affect estimated agricultural impacts of extreme weather. Using corn yields across the U.S. Corn Belt, it shows that constructing nonlinear weather measures after spatial interpolation reduces measured exposure to extreme heat and changes both estimated yield impacts and their downstream economic implications.

The second essay examines how weather exposure affects drinking water quality. It shows that microbial contamination responds …

Anaerobic Digestion Of Variable, Heterogeneous Organic Wastes Under Changing Operational Conditions And Bioaugmentation: Impacts On Process Performance And Microbiome Dynamics, Victoria Holliday

Theses and Dissertations--Biosystems and Agricultural Engineering

Expanding the adoption of anaerobic digestion (AD) is limited by system instabilities caused by feedstock composition and variability. Understanding how changes in feedstock and operational parameters influence microbiome dynamics is essential for developing biology-driven strategies to improve digester stability.

Two semi-continuous reactors, an experimental and a control, operated over 39 weeks across five phases with varying feedstocks and organic loading rates. Substrate-specific enrichment cultures were developed for bioaugmentation and implemented in select phases to assess its impact. Both reactors exhibited similar performance, transitioning through periods of stability, stress, and recovery in response to operational changes. Corresponding shifts in dominant taxa …

Culturally Sustaining Pedagogy Through Popular Music And Media In Elementary Music Education, Martina Vasil

Music Faculty Publications

Elementary music teachers in the United States face many challenges today, including an increasing cultural divide between teachers and students, worsening student behavior, and excessive exposure to technology in children’s lives. These challenges are magnified due to the hundreds of students elementary music teachers see weekly, the lack of teaching and planning time, and inadequate teaching resources, making it difficult to fully understand the culture and learning needs of every child. However, music educators may find culturally sustaining pedagogy (CSP) a useful tool for meeting the needs of a diverse student body. Further, when teachers engage in kid culture, the …

Review Of Current Research Describing The Influence Of Non-Health Care Drivers Of Health In Rural And Urban Populations, Katie Youngen, Julia Cecil, Tyrone F. Borders

Rural & Underserved Health Research Center Publications

Social determinants of health (SDOH) (also called social drivers of health) are the conditions of the environment where people live, learn, work, and play that are known to affect health outcomes.¹ The primary objective of this literature review is to summarize the most recent literature related to the Healthy People 2030 domains of a) economic stability, b) education access and quality, c) neighborhood and built environment, and d) social and community context.² Our particular focus is on non-health care drivers of health. The secondary objective is to identify gaps in literature applied to rural populations.

Management Of Cardiovascular Disease Risk Factors By Rural And Urban Primary Care Practices, Lars E. Peterson, Zachary J. Morgan

Rural & Underserved Health Research Center Publications

In the United States, over 650,000 people die annually from cardiovascular disease (CVD) with high associated health care and economic costs.1 Despite a strong scientific basis for their beneficial impact on health,2 rates of preventive screening remain low.3 Levels of adherence to preventive guidelines are even lower in African American populations, socioeconomically disadvantaged populations, and underserved rural populations.4 Rural populations have higher rates of modifiable risk factors—obesity, smoking, physical inactivity—for CVD than urban populations and bear a disproportionate burden from CVD.5–7 Rates of undiagnosed and poorly treated high blood pressure are more common in rural areas.8,9 Racial/ethnic minority populations also …

The Association Between Human Papillomavirus Type 16 E6 Seroprevalence And Degrees Of Anal Disease Among Men With Hiv, Krystle A.Lang Kuhs, Christopher Otieno, Staci Sudenga, Tim Waterboer, Weiqun Tong, Dorothy Wiley, Jay H. Bream, Steven Wolinsky, Jeremy Martinson, Gypsyamber D’Souza

Epidemiology and Environmental Health Faculty Publications

Introduction: Human papillomavirus type 16 (HPV16) E6 antibodies may be an early biomarker of anal cancer. We cross-sectionally evaluated when in the course of anal disease, HPV16 antibodies are induced. Methods: A nested case-control study of 846 men who have sex with men (MSM) was conducted within a prospective study of men with and without HIV. Cases of anal HPV16 (N=262), biopsy-confirmed high-grade squamous intraepithelial lesion (HSIL;N=140), and anal cancer (N=21) were individually matched to controls (N=423) on HIV status, study-participation duration, and age. Serum samples closest to diagnosis underwent HPV serologic testing; prediagnostic serial samples were tested for anal …

Association Between Educational Attainment And Discharge Disposition Following Incident Stroke Hospitalization, Ning Li, Erin L. Abner, Silvia Koton, Lena Mathews, Kunihiro Matsushita, Anna Kucharska-Newton

Epidemiology and Environmental Health Faculty Publications

Background – The relationship between educational attainment and discharge disposition after stroke hospitalization remains unclear. This study examined whether educational attainment is associated with discharge disposition after incident stroke and whether stroke severity modifies this association. Methods – The study included Atherosclerosis Risk in Communities (ARIC) participants with an incident stroke hospitalization from 1991 to 2020 who were enrolled in fee-for-service (FFS) Medicare at discharge. Discharge disposition was obtained from hospitalization claims. Educational attainment was categorized as “less than high school” vs. “high school or more.” Multivariable logistic regression models were used to estimate associations between educational attainment and discharge …

Nutrient-Driven Transcription Factor-Dna Interactions And Their Signaling Mechanisms In Metabolic Disease, Evelyn A. Bates

Theses and Dissertations--Nutritional Sciences

Metabolic homeostasis is maintained through tightly coordinated signaling networks that integrate diverse physiological inputs. Central to this regulation are transcription factors, which sense nutrient, hormonal, and vitamin-derived signals and translate them into coordinated gene expression programs. Transcription factor activity is governed by DNA binding, recruitment of coregulatory proteins, and interactions with specific response elements in gene promoters, which allows them to selectively modulate diverse metabolic pathways. Owing to their multifactorial and tunable nature, transcription factors have emerged as promising targets for the treatment and diagnosis of metabolic diseases, including metabolic dysfunction-associated steatotic liver disease (MASLD). This dissertation explores the molecular …

Changes In Telehealth Usage Among Medicaid Beneficiaries With Mental Illnesses In A Rural State: An Analysis Of Kentucky Medicaid Dataset Over 5 Years (2018–2022), Chizimuzo T.C. Okoli, Tianyi Wang, Bassema Abufarsakh, Sarret Seng, Zainab Almogheer, Jarrah Al-Kayed, Pooja Bhattarai, Holly Stith, Andrew Makowski

Nursing Faculty Publications

Introduction: Accessing mental health care remains challenging for Medicaid beneficiaries with mental illnesses (MI) in rural settings. The COVID-19 pandemic prompted telehealth service expansion through temporary policy changes and shifts in health care delivery. Despite the increased availability of telehealth as a modality to address disparities in health care access, telehealth adoption and associated use are inadequately explored among Medicaid beneficiaries with MI in Kentucky.

Objective: To examine trends and factors associated with telehealth use by residence status among Kentucky Medicaid beneficiaries with MI.

Design: A retrospective analysis of Kentucky Medicaid claims data obtained from 174,354 beneficiaries aged 18 years …

A 725-Bp Quadruple Repeat In The Promoter Of Smmyb113 Is Associated With Light-Independent Anthocyanin Regulation In Eggplant, Zhilei Xia, Meng Yang, Yinggemei Huang, Bingxin Yu, Tingxia Wan, Duanhua Wang, Qian Li, Manoj Sapkota, Shuangshuang Yan, Bihao Cao, Zhengkun Qiu

Horticulture Faculty Publications

Eggplant exhibits a diverse range of fruit colors, making it an excellent model for studying fruit pigmentation and its genetic regulation. While genes responsible for green and photosensitive purple fruit have been identified, the genetic basis of the nonphotosensitive (NPS) fruit trait in eggplant has remained elusive. In this study, we characterized a major quantitative trait locus (QTL), SmNPS10.1, on chromosome 10 using QTL-seq. By combining linkage-based gene mapping with progeny testing, we fine-mapped SmNPS10.1 to a 33.58-kb interval, within which we identified SmMYB113, an R2R3-MYB transcription factor that regulates anthocyanin biosynthesis, as the candidate gene. Sequence analysis …

Bariatric Surgery Impacts Immune Cell Metabolism And Function Dependent On Metabolic Status, Samantha N. Hart

University of Kentucky Doctoral Dissertations

Type 2 Diabetes (T2D), one of the top ten causes of death worldwide, is fueled by chronic inflammation. T2D is considered a metabolic disease, and there is a great push to target metabolic and associated inflammatory pathways to ameliorate the disease & its comorbidities i.e., obesity and cardiovascular disease. Thus far, clinical trials of anti-inflammatory drugs have had modest impacts on T2D and have not led to changes in clinical practice. This may in part be due to a gap in knowledge in the mechanism(s) driving obesity-associated chronic inflammation. I posit that metabolic abnormalities in immune cells in those with …

Promptable Segmentation For Adaptive And Data-Efficient Medical Image Analysis, Tyler Ward

University of Kentucky Doctoral Dissertations

Image segmentation is a fundamental task in computer vision. While segmentation models have traditionally been trained in a fully-supervised manner, recent approaches have leveraged large-scale pre-training and prompting mechanisms to great effect. However, the performance of such approaches often degrades when applied to domain-specific tasks like medical image analysis. A major reason for this lies is that these models are trained on large, labeled datasets of natural images, which have drastically different characteristics compared to medical images, limiting the generalizability of the methods when applied to medical data. This dissertation presents several data-efficient, adaptive, and promptable medical image segmentation models. …

Multiscale Modeling Of The Thermomechanical Behavior Of Polymeric And Molecular Organic Semiconductors, Kehinde H. Fagbohungbe

University of Kentucky Doctoral Dissertations

Organic semiconductors, derived from π-conjugated polymers and molecules, enable the development of deformable, stretchable and flexible electronics due to their tunable redox, optical, electronic and mechanical properties. However, an informed understanding of how multi-scale morphological characteristics of the polymeric and molecular semiconductors influence bulk properties that contribute to electronic and optical performance, especially under operational thermal and mechanical stresses, remains incomplete. This lack of understanding poses a challenge to scalability and commercialization of organic electronics. This dissertation develops and deploys computational modeling approaches, particularly atomistic molecular dynamics (MD) simulations, to investigate the multiscale morphological behavior of these synthetic semiconducting materials …

The Power Of A Picture: Building Visual Depictions Of The Eppm Bolstering Sunscreen Application Motivation, Ansley M. George

University of Kentucky Doctoral Dissertations

This study investigates visual depictions of efficacy skin cancer health risk messages. Using Witte's Extended Parallel Processing Model (EPPM) and existing literature on fear appeals and visual persuasion as a theoretical framework, the study aims to explore how self and response efficacy imagery impacts individuals' perceptions of health risk messages in the context of skin cancer prevention when emphasizing specific principles of design. Formative research was employed via qualitative photo sorts and participants were exposed to an assortment of images depicting efficacy in the context of skin cancer prevention where they discussed why they felt they were or were not …

A Nonlocal Lattice Particle Method For Modeling Hcp Polycrystalline Solids, Di Liu

University of Kentucky Doctoral Dissertations

Polycrystalline materials, composed of individual grains with varying grain size, shape, and crystallographic orientation are widely used in various engineering and industrial applications. Conventional applications of polycrystalline materials rely on the macroscopic performance, and the microstructural features are usually homogenized out. With the advancement of modern technologies and improvement of characterization methods, polycrystalline materials find their applications in meso- and micro-scale systems. At these length scales, the microscopic features including grain boundary characteristics significantly affect the material physical responses. As a result, the conventional continuum mechanics models become problematic, especially for material failure problems where the microstructural features play dominant …

Effects Of Emerald Ash Borer Specific Gene Silencing Using Rna Interference On Soil Communities, Faith S. Boa

University of Kentucky Master's Theses

The emerald ash borer (EAB) (Agrilus planipennis Fairmaire) is an invasive wood- boring beetle from Asia that primarily feeds on ash trees (Fraxinus spp.). Since its invasion of North America, EAB threatens the functional extinction of ash with damages and management costs projected to reach $900 million by 2054. Current management strategies have been insufficient to prevent EAB’s spread, highlighting the need to advance innovative approaches like RNAi, which has demonstrated efficacy against EAB in laboratory and greenhouse trials. Double-stranded RNA targeting heat shock 70-kDa protein (hsp) induces EAB mortality, systematically disperses and persists in …

Economic Exchange And Relational Work In Doubled-Up Households, Hope Harvey

Sociology Faculty Publications

Doubling up, or sharing a home, is an increasingly common way that families make ends meet. Drawing on over 170 in-depth interviews with 60 parents, I ask how doubled-up household members understand and contest their economic relationships. I show that the success of intra-household economic exchange depends not only on the amounts exchanged, but also the shared meanings behind these exchanges. Given the lack of institutionalized expectations guiding doubled-up household relationships, household members draw on competing norms, framing the household as either a solidarity unit or a series of independent nuclear family units. Although disagreement over economic relationships is common, …

Understanding Resilience In Children In Out-Of-Home Care: Using Person-Centered Health Services Research, Hyeeun K. Shin

Theses and Dissertations--Health Services Research (HSR)

Adverse childhood experiences (ACEs), which refer to exposure to traumatic life events before age 18, and instability in caregiving experiences contribute to poor physical, mental, behavioral, and developmental health outcomes for both children and adults. Previous research shows that these experiences can have negative effects both in the short term and throughout a person’s life. However, children’s strengths, which are the internal and external assets that support their development, can help protect against the impact of ACEs. Effective parenting, positive social support, and self-regulation skills are essential factors that build resilience, helping individuals adapt to challenges that may affect their …

The Digital In The Library: Finding The Mutually Beneficial Synergy, James M. Donovan

Law Faculty Books and Chapters

With the value of access to digital resources abundantly demonstrated during the COVID-19 lockdown, enthusiasm for the format is reaching new heights. This chapter counsels restraint, rebutting the argument that skepticism concerning the wide adoption of digital materials into the library is due merely to nostalgia by anti-technologists for a now-bygone age. Despite their obvious usefulness in certain situations, patrons have not responded well when libraries propose to discard legacy print collections in favor of transient electronic formats.To explain this rejection, this chapter argues that libraries are built upon principles of collection development and organization of materials in order to …

College Student Perceptions Of A Pilot Cooking And Nutrition Education Workshop Through The Lens Of The Social Cognitive Theory: A Qualitative Study, Emma Watras, Amelia Sullivan, Emalee Harrington, Mona Therrien-Genes, Kathryn Yerxa, Makenzie Barr-Porter, Jade Mcnamara

Dietetics and Human Nutrition Faculty Publications

This study qualitatively examined college students' perceptions of a pilot cooking and nutrition workshop, College Cooking Connection (CCC), through the Social Cognitive Theory (SCT) framework. Undergraduate students who attended at least one CCC workshop (N = 29) were invited to a 30 min virtual focus group. A trained moderator guided the discussion to gather perceptions of the program. Themes were identified using thematic analysis with a directive and deductive approach based on SCT. Focus groups revealed eight major themes across the SCT. Cognitive themes included: (1) improved nutrition literacy, (2) understanding the nutrition-mental health connection, and (3) increased awareness of …

Expressing Experiences Of Being Gender Non-Conforming In The “Ladies” Restroom Through Autoethnography-Based Research Poetics, Ellen D.B. Riggle

Gender and Women's Studies Faculty Publications

Three research poems are created as an autoethnographic response to feedback on a research article on the author’s experiences as a gender non-conforming person in women’s public restrooms. The feedback loop includes the sharing of lived experiences by others and theoretical (why?) discussions in the context of the gendered policing and politicalization of women’s restrooms. The first found poem includes words, phrases, and descriptions of images used to label spaces designated as women’s restrooms. The second prose poem recounts the author's experiences through a reframing of risk to women’s health, understanding the cultural context of male entitlement and White supremacy, …

Legal Professional Identity Development: An Exploration Of The Social And Emotional Processes By Which Law Students Transition From Novices To Professionals, David Hall Abney Ii

Theses and Dissertations--Communication

This dissertation seeks to heed the call for expansion of instructional communication research (ICR) beyond the undergraduate classroom and undergraduate learning objectives by exploring older learners and higher-order affective learning objectives. Legal professional identity development (LPID) is a discipline-specific type of higher-order affective learning that is conceptualized as a continuous nonlinear process that begins in law school and extends throughout a lawyer’s career, involving the internalization of the legal profession’s core values and norms and their integration with an evolving identity. Using a pragmatic ICR approach and a mixed-methods design, Phase 1 employed individual interviews and focus groups to investigate …

Can Love Bloom On A Battlefield: An Analysis Of Queer Militaristic Fanfiction, Brandon Bost

Theses and Dissertations--Communication

It is noted that readers and fans hold unique and valid interpretations of texts, interpretations that become expressed in fan works like fan art, memes, or the subject of this study, fanfiction. This study performs textual analysis on queer fanfiction in Metal Gear Solid and Code Geass fandoms. It examines the unique relationship militarism holds with intimacy, and how intimacy intersects with violence and control in unique ways in these fan texts. Within these fanfics, militarism can serve as a barrier to intimacy, forcing relationships to adapt to militaristic structures within these fan interpretations.

Exploring The Relationship Between Self-Esteem And Communication Among Equestrians In Facebook Groups, Jenna Young

Theses and Dissertations--Communication

People’s interpersonal relationships and social groups are connected to their self-esteem. Equestrians, a social group unified around riding or working with horses, form identities based on their involvement in the equine industry, whether that be recreationally or professionally. Equestrians’ subjective views of self-esteem may be related to their overall well-being. Theories related to self-esteem and identity indicate that communication within social relationships, like within the equine industry, may impact an individuals’ sense of self-worth. Facebook groups have increased in popularity in the equine industry due to the ease of communication between equestrians. Therefore, this study investigated the relationship between self-esteem …

Conflict Management In Heterosexual Romantic Relationships: A Cognitive Dissonance Perspective, Benjamin Grissom

Theses and Dissertations--Communication

This paper examines how cognitive dissonance corresponds with conflict management strategies in heterosexual romantic relationships from the perspective of romantic partners. The paper synthesizes current findings on how conflicting beliefs and attitudes impact partners' approaches to handling disagreements. Patterns are identified in how cognitive dissonance co-occurs with competition, avoidance, accommodation, compromise, and collaboration. Findings suggest that the discomfort arising from holding conflicting cognitions corresponds to their conflict management approaches depending on the degree of discomfort. Additionally, relationship length is examined as a moderator of the connection between cognitive dissonance and conflict management. Understanding these perceptions can provide insights into enhancing …