Digital Commons Network^™

Giving Retakes Their Best Chance To Improve Learning., Thomas Data Guskey

Educational, School, and Counseling Psychology Faculty Publications

Assessment retakes can improve student learning if educators clear up a few misconceptions and avoid common missteps.

Jockeying For The Labor-Dispute Exemption: How The First Circuit Wrongly Exempted Independent Contractors From Antitrust Law, But Why Congress Should Expand The Exemption, Dylan Keefe

Kentucky Journal of Equine, Agriculture, & Natural Resources Law

No abstract provided.

Retention Strategies Among Those On Community Supervision In The South: Lessons Learned During The Covid-19 Pandemic., Breana J. Uhrig Castonguay, Katherine Lemasters, Chris Corsi, Evan J. Batty, Taylor J. Krajewski, Madelene Travis, Craig Waleed, Carrie B. Oser, Kathryn M. Nowotny, Lauren Brinkley-Rubinstein

Sociology Faculty Publications

OBJECTIVES: Cohort studies must implement effective retention strategies to produce internally valid and generalizable results. Ensuring all study participants are retained, particularly those involved in the criminal legal system, ensures study findings and future interventions will be relevant to this group, who are often lost to follow-up: critical to achieving health equity. Our objective was to characterize retention strategies and describe overall retention among an 18-month longitudinal cohort study of persons on community supervision prior to and during the COVID-19 pandemic.

METHODS: We implemented various retention strategy best-practices (e.g., multiple forms of locator information, training study staff on rapport building, …

An Exploration And Performance Of Underrepresented Composers For Cello, Anna M. Watrous

Libraries Award for Undergraduate Scholarship

As I was preparing for my senior degree cello recital (the performance component of this thesis) last summer, I realized that all the composers I planned on programming were famous composers that were white men. As a woman cellist, teacher, and arts advocate, I knew this was not the story that I wanted to tell through my recital. I realized that there was no reason to wait until after graduation when I was “finished learning” to be an advocate for those underrepresented in the arts, I could start with this recital. Through the process of programming, preparing, and performing this …

A Peculiar Institution: White Supremacy And The Black Guides Of Mammoth Cave, Seth Garcia

Libraries Award for Undergraduate Scholarship

Intensive tourist operations at Mammoth Cave began in 1838 when Frank Gorin purchased the cave property. He brought with him Stephen Bishop, an enslaved person who would become famous across the Western world for his explorations of the cave and his knowledge of its geology. Gorin would also lease Nicholas and Matterson Bransford, and these three men would begin a 100-year history of black guides at Mammoth Cave. This essay utilizes source material written by white visitors in diaries, guidebooks, and travelers’ accounts to better understand white supremacy during the mid to late 19th century. The guides were in a …

Real-Time Surveillance Of The Drug Epidemic: An Assessment And Comparative Visualization Of Substance Abuse In The Commonwealth Of Kentucky, Julia Van Hosen

Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.)

The purpose of this study was to implement and examine a new surveillance system for Kentucky State Police’s forensics unit to track trends of illicit drugs and drug trafficking, and to see if the implementation of this new system was associated with a decrease in overall drug counts over a period of five months. An extensive review of the literature showed that the drug epidemic in the United States continues to worsen, with public health and law enforcement institutions leading the fight in attempting to end the epidemic, but little evidence showing these two joining forces to work together.

Results …

"Disparities In Suicide Mortality Among Healthcare Support Workers In The United States, 2003-2019", Sol Ngam

Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.)

Objectives: To identify differences in demographic and contextual characteristics of suicide mortality among healthcare support workers (HCSWs) and to estimate annual suicide rates among HCSW in the United States from 2003-2019 using the National Violent Death Reporting System (NVDRS) and the United States Bureau of Labor Statistics (BLS).

Methods: Demographic variables of healthcare support worker suicide decedents were collected using the NVDRS. Odds ratios for circumstantial risk factors by sex were calculated. Crude rates for healthcare support worker suicide decedents were calculated and compared to the U.S. general population suicide crude rates.

Results: Male HCSW were more likely to have …

Developing Ecologically Valid Clinical Tools For Persons With Tbi: Understanding The Role And Impact Of Distractions, Deanna Pinnow

Theses and Dissertations--Rehabilitation Sciences

There is a critical need for the development of ecologically valid clinical tools to assess real-life cognitive functioning in persons impacted by traumatic brain injury (TBI). Chronic cognitive impairments that are exacerbated by distractions are one of the core factors contributing to poor home and community re-integration post injury. Simulation-based digital platforms (i.e., virtual reality, augmented reality, and mixed reality) have become potential solutions for eliciting real-world cognitive performance in clinical settings. Yet, there is a paucity of research investigating the role and impact of distractions on cognition. As a result, there is no clear framework of measuring distractions to …

A Jwst/Nirspec Exploration Of The Connection Between Ionization Parameter, Electron Density, And Star-Formation-Rate Surface Density In Z = 2.7–6.3 Galaxies, Naveen Reddy, Michael W. Topping, Ryan L. Sanders, Alice E. Shapley, Gabriel B. Brammer

Physics and Astronomy Faculty Publications

We examine the factors responsible for the variation in the ionization parameter (U) of high-redshift star-forming galaxies based on medium-resolution JWST/NIRSpec observations obtained by the Cosmic Evolution Early Release Science survey. The sample consists of 48 galaxies with redshifts zspec = 2.7−6.3, which are largely representative of typical galaxies at these redshifts. The [S II] λλ6718, 6733 doublet is used to estimate electron densities (n e), and dust-corrected Hα luminosities are used to compute ionizing photon rates (Q). Using composite spectra of galaxies in bins of [O III] λλ4960, 5008/[O II] λλ3727, 3730 (O32) as a proxy for U, we …

The Dust-To-Gas Mass Ratio Of Luminous Galaxies As A Function Of Their Metallicity At Cosmic Noon, Gergö Popping, Irene Shivaei, Ryan L. Sanders, Tucker Jones, Alexandra Pope, Naveen Reddy, Alice E. Shapley, Alison L. Coil, Mariska Kriek

Physics and Astronomy Faculty Publications

Aims. We aim to quantify the relation between the dust-to-gas mass ratio (DTG) and gas-phase metallicity of z = 2.1-2.5 luminous galaxies and contrast this high-redshift relation against analogous constraints at z = 0.

Methods. We present a sample of ten star-forming main-sequence galaxies in the redshift range 2.1 < z < 2.5 with rest-optical emission-line information available from the MOSDEF survey and with ALMA 1.2 millimetre and CO J = 3-2 follow-up observations. The galaxies have stellar masses ranging from 1010.3 to 1010.6 M? and cover a range in star-formation rate from 35 to 145 M? yr-1. We calculated the gas-phase oxygen abundance of these galaxies from rest-optical nebular emission lines (8.4 < 12+log (O=H) < 8.8, corresponding to 0.5..1.25 Z?). We estimated the dust and H2 masses of the galaxies (using a metallicity-dependent CO-to-H2 conversion factor) from the 1.2mm and CO J = 3..2 observations, respectively, from which we estimated a DTG.

Results. We find that the galaxies in this sample follow the trends already observed between CO line luminosity and dust-continuum luminosity from z = 0 to z = 3, extending such trends to fainter galaxies at 2.1 < z < 2.5 than observed to date. We find no second-order metallicity dependence in the CO - dust-continuum luminosity relation for the galaxies presented in this work. The DTGs of main-sequence galaxies at 2.1 < z < 2.5 are consistent with an increase in the DTG with gas-phase metallicity. The metallicity dependence of the DTG is driven by the metallicity dependence of the CO-to-H2 conversion factor. Galaxies at z = 2.1-2.5 are furthermore consistent with the DTG-metallicity relation found at z = 0 (i.e. with no significant evolution), providing relevant constraints for galaxy formation models. These results furthermore imply that the metallicity of galaxies should be taken into account when estimating cold-gas masses from dust-continuum emission, which is especially relevant when studying metal-poor low-mass or high-redshift galaxies.

Measurements Of Dielectron Production In Au + Au Collisions At √Snn = 27, 39, And 62.4 Gev From The Star Experiment, Star Collaboration

Physics and Astronomy Faculty Publications

We report systematic measurements of dielectron (e+e−) invariant-mass Mee spectra at midrapidity in Au + Au collisions at √s NN = 27, 39, and 62.4 GeV taken with the STAR detector at the Relativistic Heavy Ion Collider. For all energies studied, a significant excess yield of dielectrons is observed in the low-mass region (0.40 < M ee < 0.75 MeV/c2 ) compared to hadronic cocktail simulations at freeze-out. Models that include an in-medium broadening of the ρ-meson spectral function consistently describe the observed excess. In addition, we report acceptance-corrected dielectron-excess spectra for Au + Au collisions at midrapidity (|yee| < 1) in the 0–80% centrality bin for each collision energy. The integrated excess yields for 0.4 < Mee < 0.75 GeV/c2 , normalized by the charged particle multiplicity at midrapidity, are compared with previously published measurements for Au + Au at √s NN = 19.6 and 200 GeV. Models that include an in-medium broadening of the ρ-meson spectral function consistently describe the observed excess. The normalized excess yields in the low-mass region show no significant collision energy dependence. The data, however, are consistent with model calculations that demonstrate a modest energy dependence.

Measurements Of The Elliptic And Triangular Azimuthal Anisotropies In Central 3he + Au, D + Au And P + Au Collisions At √Snn P = 200 Gev, Star Collaboration

Physics and Astronomy Faculty Publications

The elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients in central He3+Au, d+Au, and p+Au collisions at sNN=200 GeV are measured as a function of transverse momentum (pT) at midrapidity (|η|< 0.9), via the azimuthal angular correlation between two particles both at |η|< 0.9. While the v2(pT) values depend on the colliding systems, the v3(pT) values are system independent within the uncertainties, suggesting an influence on eccentricity from subnucleonic fluctuations in these small-sized systems. These results also provide stringent constraints for the hydrodynamic modeling of these systems.

Observation Of Directed Flow Of Hypernuclei 3/Λ H And 4/Λ H In √𝑠nn=3  Gev Au+Au Collisions At Rhic, Star Collaboration

Physics and Astronomy Faculty Publications

We report here the first observation of directed flow (v1) of the hypernuclei H/Λ 3 and H/Λ 4 in mid-central Au+Au collisions at √sNN=3 GeV at RHIC. These data are taken as part of the beam energy scan program carried out by the STAR experiment. From 165×106 events in 5%-40% centrality, about 8400 H/Λ 3 and 5200 H/Λ 4 candidates are reconstructed through two- and three-body decay channels. We observe that these hypernuclei exhibit significant directed flow. Comparing to that of light nuclei, it is found that the midrapidity v1 slopes of H/Λ 3 and H/Λ 4 follow baryon number …

Beam Energy Dependence Of Fifth- And Sixth-Order Net-Proton Number Fluctuations In Au + Au Collisions At Rhic, Star Collaboration

Physics and Astronomy Faculty Publications

We report the beam energy and collision centrality dependence of fifth and sixth order cumulants (C5, C6) and factorial cumulants (κ5, κ6) of net-proton and proton number distributions, from center-of-mass energy (sNN) 3 GeV to 200 GeV Au+Au collisions at RHIC. Cumulant ratios of net-proton (taken as proxy for net-baryon) distributions generally follow the hierarchy expected from QCD thermodynamics, except for the case of collisions at 3 GeV. The measured values of C6/C2 for 0%-40% centrality collisions show progressively negative trend with decreasing energy, while it is positive for the lowest energy studied. These observed negative signs are consistent with …

Internalized Homonegativity And The Mental Health Of Lesbian, Gay, And Bisexual Individuals: An Integrative Treatment Approach, David Kearby

DSW Capstone Projects

Lesbian, gay, and bisexual individuals (LGBI) have a higher rate of mental health disorders than the general population. The mental health disparities experienced by LGBI are positively correlated with higher internalized homonegativity (IH) levels, which impacts their functioning at the unconscious, cognitive, and interpersonal levels. Thus, effective interventions targeting the mental health of LGBI must consider IH's intrapsychic, cognitive, and interpersonal nature. An integrative psychotherapy approach addressing the mental health and IH of LGBI is needed to address the intrapsychic, cognitive, and interpersonal factors at play.

Product one of this capstone is a systematic literature review that identified psychotherapeutic interventions …

Three Essays On Health, Food, And Agricultural Economics, Saber Feizy

Theses and Dissertations--Agricultural Economics

This dissertation comprises three distinct but interrelated projects that explore the intersection of agriculture, nutrition, and economics. The first project investigates the impact of Community Supported Agriculture (CSA) food programs on the health outcomes of its participants. Using fixed effects models and a matching algorithm, the study finds that while conventional fixed effects models indicate a significant effect of CSA participation on diet-related medical expenditures, our modified time-heterogenous fixed effects model did not find a meaningful effect. The results of the matching method are consistent with those of our modified model.

The second project examines racial disparities in the prevalence …

Consumers’ Preferences And Willingness To Pay For Value-Added Dairy Products In Kentucky - Considering Price, Provenance, And Environmental Product Attributes, Favour E. Esene

Theses and Dissertations--Agricultural Economics

Many medium and smaller dairies are shifting to various kinds of value-added products that may expand in demand nationally aside from fluid milk. This study uses a latent class logit model to investigate the heterogeneity of consumer preferences and willingness to pay for dairy value-added products across four latent classes considering different local and environmental sustainability labels. The dairy products examined for this research are butter, cheese, yogurt, and ice cream. This research revealed that younger consumers, especially those that reside in rural areas, always pay attention to product attributes when they shop for dairy products, mostly the local state …

Interactive Association Of Posttraumatic Stress Disorder, Apolipoprotein Ε4 Genotype, And Age On Cognitive Functioning, Karen A. Lawrence, Colton Rippey, Bianca Welikson, Robert H. Pietrzak, Thomas G. Adams Jr.

Psychology Faculty Publications

Background: The ε4 allele of the apolipoprotein (APOE) gene and posttraumatic stress disorder (PTSD) are associated with cognitive deficits. Both associations may vary depending on age. No previous study has examined a possible three‐way interaction between APOE ε4, PTSD, and age on cognitive functioning.

Methods: Data were analyzed from 1244 European‐American U.S. military veterans who participated in the 2011 National Health and Resilience in Veterans Study (NHRVS). Analyses of covariance were used to examine the main effects and in- teractions of APOE ε4, PTSD, and age on learning/working memory (LWM) and attention/psychomotor (APM) performance.

Results: A significant three‐way interaction between …

Building Energy Modeling And Studies Of Electric Power Distribution Systems With Distributed Energy Resources, Evan S. Jones

Theses and Dissertations--Electrical and Computer Engineering

There is significant opportunity for savings in energy and investment from improved performance of electric Power Distribution Systems (PDSs) through optimal planning and operation of conventional voltage-controlling devices. Novel multi-step model conversion and optimal capacitor planning (OCP) procedures are proposed for large-scale utility PDSs and are exemplified with an existing utility circuit of approximately 4,000 buses. Simulated optimal control and operation is achieved with a cluster-based approach that utilizes load-forecasting to minimize equipment degradation by intelligently dispersing device setting adjustments over time such that they remain most applicable. Improved performance may also be achieved through smart building technologies and Virtual …

Cumulative Risk For Children’S Behavior Problems And Child Abuse Potential Among Mothers Receiving Substance Use Treatment: The Unique Role Of Parenting Stress, Stephanie Gusler, Angela Moreland

Psychiatry Faculty Publications

There is a high prevalence of children whose parents suffer with a substance use disorder (SUD), which is associated with negative outcomes for children such as behavior problems and parents’ child abuse potential. To understand negative consequences for children, it is important to consider a cumulative risk model, examining the impact of multiple co-occurring risks, as well as examine unique singular risk factors, such as parenting stress, which may have a direct effect on outcomes as well as mediate an association between cumulative risk and outcomes. Data came from 99 mothers with SUD, engaged in a substance treatment program. Results …

Adolescent Intermittent Ethanol Drives Modest Neuroinflammation But Does Not Escalate Drinking In Male Rats, Jessica I. Wooden, Lauren E. Peacoe, Chinchusha Anasooya Shaji, Jennifer K. Melbourne, Cassie M. Chandler, Michael T. Bardo, Kimberly Nixon

Psychology Faculty Publications

During adolescence, the brain is highly susceptible to alcohol-induced damage and subsequent neuroimmune responses, effects which may enhance development of an alcohol use disorder (AUD). Neuroimmune reactions are implicated in adolescent alcohol exposure escalating adulthood drinking. Therefore, we investigated whether intermittent alcohol exposure in male, adolescent rats (AIE) escalated adult drinking via two-bottle choice (2BC). We also examined the influence of housing environment across three groups: standard (group-housed with enrichment during 2BC), impoverished (group-housed without enrichment during 2BC), or isolation (single-housed without bedding or enrichment throughout). In the standard group immediately after AIE/saline and after 2BC, we also examined the …

Changes In Severity Of Diabetes At Diagnosis Following The Onset Of The Sars-Cov-2 Pandemic, Annelise King

Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.)

During the SARS-CoV-2 pandemic it was seen that diabetes was a risk factor for severe COVID-19. The objective of this study is to assess the severity of diabetes at diagnosis during the COVID-19 pandemic compared to pre-pandemic to see how the pandemic and SARS-CoV-2 infection impacted the severity of diabetes. This study used University of Kentucky electronic health records of 13,794 patients who developed diabetes. The majority of patients were female, white non-Hispanic, 65+, and living in an urban area. There were differences seen between the COVID-19 positive and negative cohorts in the DKA and HbA₁c variables, with …

The Prepare Mobile Program For Hiv Prevention In Washington D.C., Gabrielle Cochran

Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.)

Incidence rates of HIV have decreased in the United States in the past decade, but the southern United States has higher rates of HIV than other regions, and cities in the south, like Washington D.C., have some of the highest rates of HIV incidence in the nation. Risky sexual behavior, needle sharing, and substance use increase the risk of transmitting or acquiring HIV, and these behaviors are more common among unhoused people (CDC, 2021; CPPH, 2022).

Expansion of community resources in cities with high levels of HIV have allowed for many people at high risk for HIV to comply with …

The Relationship Between Maternal Depressive Symptoms And Unsafe Infant Sleep Practices In A Low-Resource Community, Rebecca D. Day, Ketrell L. Mcwhorter, Hartley C. Feld, Steven R. Bronwing

Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.)

Objectives: To determine the relationship between maternal depressive symptoms and unsafe infant sleep intention and practices during and after pregnancy.

Methods: This study recruited 100 women from a small clinic in a low-resource community of Santo Domingo, Ecuador from 2018 to 2020. Information on intention to practice safe sleep was collected during the third trimester of pregnancy and safe sleep practices were assessed at 1 month and 6 months postpartum via survey. Depressive symptoms were measured using the Patient Health Questionnaire 2 (PHQ-2). Using log-binomial regression, we estimated prevalence ratios (PR) and 95% confidence intervals (CI) cross-sectionally at …

Breastfeeding Promotion In The Workplace, Katie C. Nettesheim

Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.)

Breastfeeding is one of the best things a mother can do for her baby. It has many protective qualities including a reduced risk of sudden infant death syndrome (SIDS), asthma, obesity, type 1 diabetes, respiratory infections, ear infections, and stomach bugs for the baby (CDC, 2022). There are also protective qualities for the mother as well, including a reduced risk of high blood pressure, breast and ovarian cancer, and type II diabetes. Breastfeeding exclusively, the infant only receives breastmilk and no other supplementation for 6 months, which maximizes the many benefits that breastfeeding has.

Rural areas of the United States …

Comparing The Efficacy Of Interventions Derived From Concurrent Operant Analysis And Indirect Assessment, Lane Marquardt

Theses and Dissertations--Early Childhood, Special Education, and Counselor Education

In this study, a simultaneous treatments design was used to conduct a concurrent operant analysis (COA) to evaluate the choice making behavior of one elementary aged student. The COA results were used as a possible reinforcer for one of the conditions for the intervention to increase work completion. An indirect assessment, Questions about Behavioral Function (QABF), was used identify a hypothesized function to the student’s lack of task completion behavior. The results from thee QABD were used as a possible reinforcer for one of the conditions for the intervention to increase work completion. An alternating treatments design (ATD) was used …

Effects Of Video Modeling With Voice-Over Narration Versus No Voice-Over Narration, Kennedy Carpenter

Theses and Dissertations--Early Childhood, Special Education, and Counselor Education

In the current study, the effects of video modeling with voice-over narration (VMW) was compared to the effects of video modeling with no voice-over narration (VMN) when learning the acquisition of a vocational skill. Four high-school students within a public school who spent most of their school day in a special education classroom participated in the study. An adapted alternating treatments design was used to compare the VMW and VMN conditions and then a best alone condition was conducted for each participant that used the video modeling procedure that demonstrated superiority during the comparison. A modification of the inclusion of …

Evaluating The Differential Effects Of Using A Technology-Based Antecedent Intervention In Comparison To A Technology-Based Treatment Package, Rachel Fosnaught

Theses and Dissertations--Early Childhood, Special Education, and Counselor Education

This study investigated the differential effects of using non-contingent reinforcement in the form of attention as an antecedent intervention in comparison to using non-contingent reinforcement in addition to self-monitoring as a treatment package. A multi treatment single case research design was utilized in this study. Levels of student’s on-task behavior were measured to evaluate the differential effects of an antecedent intervention in comparison to the combination of an antecedent and consequent intervention. This study also only used treatments that were technologically delivered to the participants.

Self-Advocacy Training For Students With Complex Communication Needs Using Time Delay And Generative Learning, Alexis Rai Patterson

Theses and Dissertations--Early Childhood, Special Education, and Counselor Education

Employers seek employees with communicative competence in various vocational environments. Communicative competence is created through socio-linguistic skills such as self-advocacy and self-determination skills. This study examined communicative competence for individuals with complex communication needs within a vocational environment. Generalization of skills across environments is imperative for skill development for individuals with disabilities. This study also examined the use of generalization of skills with using generative learning.

Disability Label And Least Restrictive Environments: General Elementary Education Teachers’ Experiences And Perceptions, Sara Sheffler

Theses and Dissertations--Early Childhood, Special Education, and Counselor Education

The least restrictive environment (LRE) is the educational placement determined necessary for obtaining maximum educational benefits. The individualized education program (IEP) team determines the LRE after analyzing the student’s academic and behavioral data and assessing the student’s unique needs. Specific special educational labels may produce a higher-than-normal frequency of more restrictive environment decisions by the IEP team. The current study surveyed general education elementary teachers about LRE placements of a hypothetical student with either autism spectrum disorder or emotional and behavioral disorders. Teachers were provided with a hypothetical vignette of a student engaging in challenging behavior, followed by hypothetical data …