Digital Commons Network^™

Neighborhood Deprivation Associated With Impaired Sit-To-Stand Performance In Middle-Aged And Older Adults: A Cross-Sectional Analysis With Clinical Implications, Kenneth Harrison, Silvia Campos-Vargas, Brandon M. Peoples, Keven G. Santamaria-Guzman, David T. Redden, Michael A. Samaan, Jaimie A. Roper

Kinesiology and Health Promotion Faculty Publications

Background: Socioeconomic factors significantly influence health outcomes in older adults, yet their impact on specific aspects of mobility remains unclear. This study investigates the relationship between area-level socioeconomic disadvantage and mobility health in older adults.

Methods: We conducted a cross-sectional study of 110 community-dwelling older adults recruited and collected using voluntary response sampling at eight health fairs across rural Southeast Alabama in 2022–2024 (60 ± 16 years, 80% female). Area-level socioeconomic status was measured using the Area Deprivation Index (ADI), a validated composite measure of neighborhood disadvantage. Mobility was assessed using the Instrumented Timed Up and Go (iTUG) test and …

Anuran Occupancy Of Created Wetlands Within Reforested Legacy Surface Mines In Kentucky And West Virginia, Jillian C. Newman, Steve Price, Jacquelyn C. Guzy, Joshua Castle, John J. Cox, Jeffery L. Larkin, Christopher D. Barton

Forestry and Natural Resources Faculty Publications

Restoration of habitat is an important component of wildlife management. Surface coal mining has altered forest cover in the Central Appalachians, and most reclamation activities on previously mined lands result in non-native grasslands or shrub lands. The Forestry Reclamation Approach (FRA), which emphasizes non-native vegetation removal, soil decompaction, planting of native trees and shrubs, and, in some cases, wetland creation represents an alternative to grassland-based reclamation that may promote forest-associated wildlife on legacy surface mines. We used automated recording units to evaluate the response of anurans to created wetlands and the FRA in Kentucky and West Virginia, USA. We used …

Exploring Pathways To Persistence And Self-Efficacy Among Historically Underrepresented Community College Students: A Mixed Methods Action Research Study, Sharmy Rene Davis

Theses and Dissertations--Educational Leadership Studies

Research indicates that postsecondary institutions have struggled to retain historically underrepresented college students. These students continue to experience lower levels of persistence and college self-efficacy compared to their peers (Monjaras-Gaytan & Sánchez, 2023).

This dissertation is a mixed methods action research study that identified the academic challenges historically underrepresented college students face. This study focused on diagnosing the problem, engaging in multiple Reconnaissance phases, and using those findings to plan a contextually responsive intervention.

Findings indicate that historically underrepresented college students may benefit from enhanced academic support, stronger advising relationships, and greater opportunities to build peer connections. The findings of …

Deep Crustal Boundaries As Fluid Conduits: A Geochemical Investigation Of Mvt Mineralization In Kentucky And Beyond, Dairian Boddy M. Boddy

Theses and Dissertations--Earth and Environmental Sciences

Critical minerals are vital to the United States economy and national security, yet their supply chains are at risk. Common minerals in Mississippi Valley-type (MVT) deposits, such as sphalerite, galena, fluorite, and barite, host critical metals such as barium, gallium, germanium, and zinc, which are essential for energy technologies. An investigation of three MVT mineral districts in Kentucky elucidated previously unrecognized systematics, genetic relationships, and sources of ore components using stable and radiogenic isotope geochemistry, particularly from galena, sphalerite, barite, and gangue minerals (e.g., carbonates). The localization and dominant type of mineralization in each district are potentially influenced by deep …

Microglial Apoe Across Alzheimer’S Disease-Relevant Pathologies, Georgia Nolt

Theses and Dissertations--Physiology

APOE exists as three common alleles (APOE2, APOE3, APOE4) that encode their corresponding protein isoforms (apoE2, apoE3, apoE4). Despite differing by only one or two single-amino acid substitutions, each APOE allele confers a distinct AD risk profile with APOE4 increasing risk by 28% and APOE2 decreasing risk by 14% compared to the most commonly expressed APOE3 allele. While traditionally considered “neutral,” APOE3 still accounts for ~36% of AD cases while APOE4 contributes ~57%, indicating that the majority of AD cases would not occur in the absence of the APOE3 and APOE4 alleles. Microglia, the resident phagocytic immune cells …

Hallucinogen Use Among Parents Of Children In The United States: Associations With Mental Health And Substance Use, Maggie K. Richardson

Theses and Dissertations--Educational, School, and Counseling Psychology

Hallucinogen use has reemerged in the United States amid expanding clinical research and shifting social and policy contexts. However, population-based evidence remains limited regarding hallucinogen use among adults living with children and its relationship with mental health impairment severity in caregiving environments. Therefore, this study’s objective was to examine associations between past-year hallucinogen use and past-year mental health impairment among U.S. adults, and to test whether associations differ by parental status and number of children in the household. A secondary aim examined correlates of co-occurring substance use among those reporting hallucinogen use.

Data were drawn from the 2023 National Survey …

Electromyography Of The Coracobrachialis—Construct Validity And Implications For Rehabilitation Of Anterior Shoulder Dislocation, Alon Rabin, Timothy L. Uhl, Ido Druckmann, Zvi Kozol, Yossi Ruah, Dani Rotman, Dan Stein

Physical Therapy Faculty Publications

Background: The coracobrachialis (CB) is an important anterior shoulder stabilizer, yet no study has previously reported its electromyography (EMG). The purpose of this study was to validate a novel technique for surface EMG (sEMG) of the CB.   Methods: Thirty-two (21 females) healthy individuals participated in this cross-sectional study. A surface landmark for recording the CB was identified within the medial aspect of the proximal arm using real-time ultrasound imaging and cadaver dissection. The EMG from this landmark as well as from the biceps brachii (BB) were simultaneously recorded during shoulder horizontal adduction (SHAd) (a CB-dominant test), and during elbow flexion …

Bureaucratic Responsiveness In Times Of Crisis, Anna Gunderson, Maggie Macdonald

Political Science Faculty Publications

In 2020, American cities experienced mass protest after fatal police violence against Black Americans. Did police address these protests differently after the murder of George Floyd or the protests in their communities? Did that response vary depending on the racial or ideological makeup of their constituents? We link policing protests and Facebook posts from about 4,000 American police departments to investigate differences in agency responses to protest. Departments posted more about protest after Floyd's death, especially in those communities that also had a policing protest. Republican cities were less likely to post about protests, but racial demographics are not associated …

Sharp Dual-Regime Thermal Transition Driven By Bead Morphology In Metal Fused Filament Fabrication, Martin Gamesu, Nelson K. Akafuah

Mechanical Engineering Faculty Publications

This work develops a GPU-accelerated, bead-resolved digital twin for FFF that reconstructs super-elliptic filament geometries from G-code and simulates transient heat transfer via voxel-level activation synchronised to deposition order. Applied to a parametric study of two metal–polymer composites (Cu–PLA and IN718–PLA) across five super-ellipse exponents (n = 2.0, 2.7, 2.8, 2.9, 3.0), the framework reveals a sharp thermal regime transition: a 43% increase in interlayer contact width (n = 2.0 → 2.7) and 53% (n = 2.0 → 2.9) produce negligible thermal change (|Cohen’s d| < 0.02 for IN718-PLA and < 0.2 for Cu-PLA), while n = 3.0 triggers +150–178% increases in bonding windows, −55 to −60% reductions in cooling rate, and a 27–45-fold increase in thermal reactivation. The transition amplifies across temperature thresholds (2× at 170 °C, 15.8× at the glass transition), reverses the deposition-order thermal gradient (r = −0.83 to +0.64 for IN718-PLA and −0.55 to +0.81 for Cu-PLA), and causes surrogate model failure (cross-regime R² = −4.6). These findings establish bead morphology as a sharp morphology-driven threshold requiring regime-aware, material-specific digital twin. At the transition, weld-strength increases while cooling-rate decreases, indicating improved bonding uniformity and reduced residual-stress heterogeneity.

Stochastic Mechanical Mesoscale Modeling Of Cylindrical Cavities In Metallic Foams, Mujan N. Seif, Alexandre Martin, Matthew J. Beck

Mechanical Engineering Faculty Publications

Aluminum foam is a critical component of state-of-the-art micrometeoroid and orbital debris shielding. However, its randomly oriented constituent ligaments create significant variability in properties at different length scales. Previous efforts have thoroughly characterized the statistical implications of micro- to macro-scale-length transitions on the homogenized elastic behavior of damage-free, pre–micrometeroid and orbital debris (MMOD) strike structures. In this work, the properties of the residual material post MMOD impact are assessed by introducing cylindrical cavities representing the damage track. It was observed that configuring the cavity parallel to the through-the-thickness direction transformed a nominally isotropic foam into an anisotropic (transverse isotropic) material, …

The Impact Of A Kentucky Nutrition Education Program Social Marketing Campaign On Resident Health, Trinity Elizabeth Foster

Theses and Dissertations--Agricultural Economics

Poor diet quality and physical inactivity are common health issues in the United States. To remedy these issues among low-income households, the United States Department of Agriculture created the Supplemental Nutrition Assistance Program Education Program (SNAP-Ed), which promoted healthy eating and physically active lifestyles through multiple avenues. The social marketing approach of SNAP-Ed uses marketing strategies to relay information to the public. In Kentucky, a statewide billboard campaign was launched in 2018 encouraging residents to focus on nutrition and physical activity. This study investigates the impact of that campaign on health outcomes in counties throughout the state. Using billboard location …

Field-Scale Evaluation Of Satellite- Derived Vegetation Indices And Image Timing For In-Season Nitrogen Management In Corn, Ana Morales-Ona, Katsutoshi Mizuta, James J. Camberato, Robert Nielsen, Yuxin Miao, Davide Cammarano, German Mandrini, Daniel Quinn

Plant and Soil Sciences Faculty Publications

Introduction: Traditional methods to determine the agronomic optimum nitrogen rate (AONR) for corn (Zea mays L.) rely on grain yield data, limiting in-season decision-making for nitrogen (N) management. Vegetation indices (VIs) derived from satellite imagery can serve as proxies for grain yield and help estimate in-season AONR, enabling timely sidedress applications. This study aimed to (1) quantify how VI–yield relationships vary during the vegetative period across fields with different tillage systems and crop residue; (2) determine whether VI–N response curves can be used to estimate AONR (AONRvi); and (3) assess the accuracy of AONRvi relative to yield-based AONR (AONRy). …

Fiber-Reinforced Composites For Vaginal Tissue Engineering Applications, Samyuktha S. Kolluru, Abir Hamdaoui, Annabella M. Mascot, Siobhan S. Sutcliffe, Jerry L. Lowder, Michelle L. Oyen, Samantha G. Zambuto

Mechanical Engineering Faculty Publications

The vagina is a fibromuscular tube-shaped organ that plays critical roles in menstruation, pregnancy, and female sexual health. Vaginal tissue constituents, including cells and extracellular matrix components, contribute to tissue structure, function, and prevention of injury and pathology. However, much microstructural function remains unknown, including how the fiber-cell and cell–cell interactions influence macromechanical properties. A deeper understanding of these interactions will provide critical information needed to reduce and prevent vaginal pathologies. Our objective for this work is to design a novel tissue-mimicking biomaterial for vaginal tissue engineering, and characterize its biological and mechanical performance in the vaginal microenvironment. We successfully …

First Water-To-Ligand Substitution Dictates Co2+/Ni2+ Extraction Selectivity, Kailong Zhang, Yuxuan Zhang, Bin Ji, Rick Q. Honaker, Isabel C. Escobar, Jian Shi, Qing Shao

Mining Engineering Faculty Publications

Solvent extraction is a crucial technology for the large-scale recovery of critical metals. One key challenge is to develop ligands with high ionic selectivity, especially for ions with similar properties. Manipulating ionic solvation emerges as a viable approach to enhance the selectivity. However, such manipulation requires a thorough understanding of the thermodynamics underlying ligand-induced variation in ionic solvation. We investigated the thermodynamics governing the binding of two organophosphorus ligands (Cyanex 272 and D2EHPA) with Co²⁺ and Ni²⁺ at the aqueous-organic liquid–liquid interface using a combination of experiments and computations. UV-vis and IR spectroscopy confirmed that extraction induces solvation …

Feasibility, Acceptability, And Preliminary Efficacy Of A Pilot Study To Integrate Buprenorphine Into A Harm-Reduction Drop-In-Center In Kampala, Uganda, Julia Dickson-Gomez, Sergey Tarima, Wamala Twaibu, Dan Katende, Latifah Kyeswa, Laura Glasman, Arthur Kiconco, Sarah Krechel, Bryan Johnston, Moses Ogwal, Brian Byamah Mutamba, Peter Mudiope, Stella Alamo, Rhoda Wanyenze, Geofrey Musinguzi

Biostatistics Faculty Publications

Illicit drug use has been increasing rapidly in Sub-Saharan Africa in the past decade. However, until recently HIV prevention has largely ignored people who inject drugs and medications to treat opioid use disorder (MOUD) were largely absent. This paper reports results of a pilot intervention that integrated buprenorphine into a harm-reduction drop-in-center for people with opioid use disorder (OUD) in Kampala, Uganda. We collected implementation outcomes and changes in self-reported drug use after buprenorphine initiation. We conducted qualitative interviews with a subset of 14 participants who had initiated buprenorphine. Sixty-two participants were screened for OUD, of whom 57 were eligible …

Artificial Intelligence In Biomedical Team Science: Perceptions, Practices, And Training Needs, Emily Slade, Kelsey N. Karnik, Caitline Phan, Megan E. Hall, Yana Feygin, Kristen J. Mcquerry

Biostatistics Faculty Publications

Introduction: Artificial intelligence (AI) is increasingly used in biomedical research, yet limited empirical work has described how researchers use AI tools on collaborative research teams and how they view their role within team-based research. This study examines researchers’ experience with and attitudes toward AI use in collaborative research environments.

Methods: A cross-sectional survey was administered to 178 investigators engaged in collaborative research at the University of Kentucky. Questions assessed AI use across research and communication tasks, team-related decision-making practices, perceived benefits and concerns, and preferences for training and frameworks.

Results: Thirty-nine participants responded (22%). AI use was heterogeneous: 26% had …

A Qualitative Study Of Undergraduate Underrepresented Minoritized Students’ Online Learning Experiences, Susanne Morris

Theses and Dissertations--Curriculum and Instruction

This dissertation reports a qualitative secondary analysis of 37 semi-structured interviews with 40 undergraduate underrepresented minoritized (URM) students. Guided by social constructionism and intersectionality, the study explores how students make sense of online learning as a sociomaterial environment, attending to perceptions of constraints, affordances, and missing or misaligned signifiers. Interviews were analyzed using Braun and Clarke’s Reflexive Thematic Analysis to examine how institutional norms and course design shape what students experience as doable, safe, and meaningful. The study offers insight relevant to research and practice in equity and online learning.

Adolescent Relationships With Digital Actors And Their Influence In A Classroom Setting: An Interpretive Case Study, Kerry A. Hancock

Theses and Dissertations--Curriculum and Instruction

In this post-COVID-19 society students are strongly influenced by their use of digital text and electronic devices. The assumption of the study was that if students spend time with devices and digital text that it might be possible for them to develop relationships with the non-human actors that exist as part of the learning environments in schools. This  interpretive case study rooted, in Posthumanist ideology, used Latour’s Actor Network Theory to approach data collection.

A comparative approach was adopted for this interpretive case study research and data were collected in three stages: initial classroom observation and analysis to determine the …

Responding To The Needs Of First-Generation Students: An Action Research Study Of Professional Development Opportunities For Faculty And Staff, Kyle G. Phillips

Theses and Dissertations--Educational Leadership Studies

First-generation college students have historically been considered marginalized in institutions of higher education, with diminished success rates and disproportionately higher incidents of imposter syndrome. This Mixed Methods Action Research study assessed the extent to which faculty and staff are able to recognize and implement research-based best practices to improve the support system surrounding this student demographic. In particular, it assessed current levels of preparation to support first-generation students and sought to identify and implement an appropriate professional development program as part of the study's intervention. The efficacy of the intervention was then assessed, with the result delineated in this dissertation. …

From Trauma To Triumph: The Relationship Between Psychological Resilience And Academic Resilience In Graduate School Students With Adverse Childhood Experiences, Jade Gingue

Theses and Dissertations--Educational Leadership Studies

This dissertation investigated the relationship between adverse childhood experiences (ACEs), psychological resilience, and academic resilience among graduate students. Grounded in resilience theory and interpreted through a trauma-informed, strengths-based lens, the study examined whether psychological resilience functions as a buffering moderator or as a direct protective factor among graduate students.

Using a quantitative design, data were collected via Qualtrics from graduate students (n = 391). This study used three previously validated instruments, including the Adverse Childhood Experiences Questionnaire (ACE-10), the Connor-Davidson Resilience Scale (CD-RISC-25), and the Academic Resilience Scale (ARS-6), along with demographic measures. Hierarchical multiple regression analyses were conducted …

The Development Of Self-Efficacy Among New Residence Life Professionals, Kenyatta S. Jeter

Theses and Dissertations--Educational Leadership Studies

New professionals in student affairs, particularly those working in housing and residence life, face complex job responsibilities that demand a high level of confidence and preparation. The purpose of this study was to increase resident directors’ sense of self-efficacy as they transition into their new role. This study employs a mixed methods action research (MMAR) design to explore the development of an effective onboarding and training framework to support housing and residence life professionals in successfully transitioning new resident directors into their roles.

An intervention plan was developed in collaboration with key stakeholders to increase resident directors’ sense of self-efficacy …

Enhancing International School Implementation Capacity: Supporting Contextualized Learning At An International Baccalaureate School In China, Christopher J. Hayden Iv

Theses and Dissertations--Educational Leadership Studies

International schools allocate substantial resources to implement progressive curricular innovations; however, the advantages offered by these developments are contingent on their effective execution within classroom settings. This mixed methods action research (MMAR) study examined the implementation of the International Baccalaureate (IB) Global Context (GC) Strategy in the Middle Years Programme (MYP) at an international school in China and asked how the school might strengthen its capacity to enact this and similar innovations. Following a sequential MMAR design, a reconnaissance phase combined a whole-staff survey (n=87) with qualitative interviews to diagnose the individual, organizational, and contextual factors shaping implementation. Analyses identified …

From The Ivory Tower To The Town Square: Defining The Public Scholar, Mary K. Littlepage

Theses and Dissertations--Educational Policy Studies and Evaluation

The term public scholar has gained increasing attention among academics and institutions, yet it lacks a definition grounded in empirical methods. This has left the term open to interpretation and led to inconsistencies in its application. Existing definitions are theoretical and emphasize a public scholar’s effort to bridge the gap between research and practice. My aim for this study was to conceptualize and preliminarily operationalize the term public scholar as a construct drawing on qualitative and quantitative data. Through a thematic analysis and initial Rasch scaling, I provided clear parameters around the construct specifically highlighting a public scholar’s behavior (practices), …

Unveiling The Shadows: An Exploratory Study On Ghostwriting, Gray Markets, And The Ethics Of Contract Cheating, Micah Crawford

Theses and Dissertations--Educational Policy Studies and Evaluation

Contract cheating has become an increasingly complex challenge for higher education, particularly as digital platforms, global academic labor markets, and generative artificial intelligence reshape the production and detection of academic work. While much of the existing literature examines contract cheating from the perspectives of students, faculty, and institutions, less attention has been given to the individuals who produce ghostwritten academic work. This dissertation addresses that gap by exploring how shadow scholars understand their roles, ethical boundaries, and participation within the academic integrity ecosystem.

Using an exploratory qualitative design, this study draws on twelve semi-structured narrative interviews with six freelance academic …

Are Multiple-Choice And Open-Ended Assessments Consistent In Predicting Science Achievement? Multivariate Multilevel Evidence From Chinese Students And Schools, Quan Wu

Theses and Dissertations--Education Sciences

A multivariate multilevel model was developed and applied to secondary data from a large-scale science assessment of Grade 8 students in China to examine the consistency between multiple-choice and open-ended formats of assessment in predicting science achievement at the student and school levels. The sample included 44,534 students from 159 schools across two regions. Multivariate multilevel results indicated a moderately positive consistency between the two formats at the student level and a strongly positive consistency at the school level; these consistencies were stable across regions and did not depend on student and school characteristics. The findings have important practical implications …

Effects Of Yoga And Mindfulness On Emotional Regulation, Behavior, And Teacher Burnout, Sara E. Smith

Theses and Dissertations--Education Sciences

This dissertation comprises three studies that examine the effects of physical activity, yoga, and mindfulness interventions on students' emotional regulation, behavior, and academic outcomes in rural Kentucky schools. These studies as a whole contribute to understanding how movement-based and mindfulness practices can enhance social-emotional and academic well-being in schools.

The first study describes the effects of classroom-based physical activity on student achievement and social-emotional well-being. Forty-five elementary students participated in a 6-week intervention with two 7-minute movement breaks per day. Results indicated statistically significant improvements in Reading (t(44) = 2.55, p < .001, d = .38), Math (t(44) = 4.63, p < .001, d = .69), and social-emotional competence (t(44) = 3.67, p < .001, d = .55). These findings demonstrate that brief, structured physical activity can meaningfully enhance academic and emotional outcomes when implemented by classroom teachers.

The second study shows the effects of a five-week …

Bridging The Intention–Behavior Gap In Mental Health Help-Seeking, Wenqi Weng

Theses and Dissertations--Educational, School, and Counseling Psychology

Objective: To examine whether modifiable factors shape the extent to which help-seeking intention is translated into formal mental health service initiation among distressed adults. Method: Participants were U.S. adults (N = 777; M age = 47.21 years, SD = 16.70; 73.23% women; 77.74% White) who reported at least moderate psychological distress and were not currently receiving formal mental health treatment. At baseline, participants completed measures of help-seeking intention, focal moderators (action planning, psychological distress, and mental health steward self-identity), coping planning, cues to action, and emotion regulation as exploratory candidate moderators. At three-month follow-up, participants reported whether …

Academic Departments As Microfoundations Of Institutional Governance, Karley A. Riffe, Meghan J. Pifer

Educational Policy Studies and Evaluation Faculty Publications

Considerations of governance in US higher education do not typically include the academic department. This results in a knowledge gap about the role of these central organizing units of academic work in the governance of colleges and universities. Through the concept of microfoundations, we explore concrete ways in which departmental governance matters, how it may be challenging, and strategies for fostering effective governance within academic departments.

The Operationalization Of Student Success: How Institutions And Divisions Of Student Affairs Define And Align Non-Academic Student Success With External Accountability Expectations, Madeline N. Trudeau

Theses and Dissertations--Educational Policy Studies and Evaluation

This qualitative multi-case study investigates how higher education institutions and their divisions of student affairs publicly discuss and define non-academic student success through their strategic planning, within the context of external pressures from state legislatures and accrediting bodies. Grounded in Organizational Learning Theory, Transition Theory, and Theory of Student Involvement and Engagement, this study analyzes the alignment and divergence between external policy expectations and internal institutional and divisional strategic plans.

The findings reveal a fundamental tension; while external stakeholders increasingly demand quantifiable outcomes tied to economic productivity - like post-graduate wages and employability metrics - divisions of student affairs continue …

A Historical Case Study Of The Effects Of The Coordinate Interagency Partnership Regulating International Students (Cipris) System And The Student Exchange Visitor Information System (Sevis) On Foreign Students Coming To The United States For Higher Education From 1990 To 2008, M. Ann Livingstone

Theses and Dissertations--Educational Policy Studies and Evaluation

The United States has welcomed foreign scholars and students since 1774, but their numbers increased dramatically after World War I, and again after World War II, as America became a world power leader and interest in the United States and its educational system and technological developments grew internationally. The Immigration and Naturalization Service (INS) was set up to oversee immigrants, visitors, and nonimmigrants who included students and diplomatic staff and families. This study deals with the changing laws and responsibilities of the INS during the period 1990 to 2008 to track foreign students in higher education, specifically with the introduction …