Digital Commons Network^™

Predicting Thoroughbred Yearling Auction Prices With Machine Learning: Evidence From The Keeneland September Sale, Yanchao Yang, John Clarke, Tapaan Madal '26, Thinh Nguyen '26, Trung Pham '25

Business Analytics Faculty Publications

We apply machine learning methods to predict Thoroughbred yearling auction prices at the Keeneland September Sale (2020–2024). Our sample includes 5,788 yearling prices with pedigree data. We use both linear and tree-based models to predict log prices. We use cross-validation to tune model hyperparameters and select Ridge regression (α = 1.451) as the primary model for interpretation given its stability and interpretability. The Ridge regression explains approximately 54% of out-of-sample variation (R2≈ 0.5403). Sire and Dam Reputation emerge as the dominant predictors. Results provide pricing benchmarks and show how reputation and session structure shape Thoroughbred yearling auction prices.

“Cutting-Off With My Family Is Never An Option In My Mind”: An Exploration Of Navigating Identity, Connections And Relational Resilience In Family And Intimate Relationships For Transgender Asian Americans, Jixuan Zhao

Dissertations - ALL

Transgender Asian Americans navigate gender identity within complex cultural, familial, and relational contexts shaped by collectivist values, racialized stereotypes, and social stigma. Despite increasing research on transgender experiences, limited scholarship has explored how transgender Asian Americans understand and negotiate their identities within family and intimate relationships. Grounded in Minority Stress Model and intersectionality theory, the current study, adopted strength-based perspectives, aims to understand unique experience related to familial and intimate relationships as well as their supports, and how they manage their relational needs as well as resilience process, shaped by the intersection of transgender identity and racial/ethnic identity. Through semi-structured …

Talking From The Soul: Exploring The Impact Of African American Vernacular English (Aave) In Digital News On Black Youth Political Behavior, Ananda Collins

Dissertations - ALL

Black youth have a long history of political engagement yet consistently report the lowest levels of traditional forms of political participation in the entire U.S electorate. While social media has emerged as an alternative political space, structural and linguistic barriers continue to limit their engagement. This dissertation examines whether African American Vernacular English (AAVE) in digital political news media influences the political behavior of young Black Americans. Using a mixed-methods approach that combines a survey experiment and in-depth interviews, this study tests whether political news written in AAVE, compared to Standard American English (SAE), affects political engagement, information retention, and …

Inundated With Uncertainty: A Cartographic Assessment Of Fema’S Flood Insurance Rate Maps (Firms) And Flood Risk Discourse, Michael Cabal

Theses - ALL

Flooding accounts for almost 90% of all natural disasters in the United States. FEMA (Federal Emergency Management Agency) is the authoritative agency tasked with mapping Special Flood Hazard Areas (SFHAs) that determine high-risk flood zones. These maps, known as Flood Insurance Rate Maps (FIRMs), are used to establish mandatory flood insurance requirements, regulate local floodplain building requirements, inform future development, and mitigate potential flood damage. However, the process for updating and implementing flood maps has come under significant scrutiny for being oversimplified, inaccurate, and incomplete. Despite existing scholarship on the shortfalls of FEMA’s recent responses to disasters, there is limited …

Spatial Capital Dynamics Examining Ecological Distribution Conflicts Within The Electric Vehicle Supply-And-Consumption Chain, Alice Piva, Anna Kondi, Beatriz Couto, Chaitaly Deshpande, Dieudonné E. Da Costa, John Smith, Josephine Agbeko, Et Al.

Michigan Tech Publications

Energy transitions are often celebrated as pathways to a greener future. Yet, they frequently reproduce spatially uneven burdens and patterns of dispossession, particularly affecting marginalised communities from the Global South. While climate justice debates have advanced, their spatial dimension has received comparatively less systematic attention. This paper documents an experimental use of spatial capital as a lens to analyse how green transitions reshape territorial agency and reinforce spatial inequalities. The three case studies across the electric vehicle chain show how spatial capital illustrates the sustainability agenda’s capacity to reshape people’s ability to access, inhabit, and act within their territories.

A Cross-Sectional Study At A Tertiary Setting Assessing Socioeconomic Burden And Psychological Impact Of Dermatophytoses, Amrita Hongal, Varsha Manchegowda, Mohan Hebbur Naraharirao, Mahalaxmi Khatagave, Rakshitha Nandeesh

Journal of General - Procedural Dermatology and Venereology Indonesia

Background: Dermatophytosis is a highly prevalent superficial fungal infection in tropical regions, often chronic due to inadequate treatment. Its recurrent nature due to misuse of topical steroids and inappropriate treatment contributes significantly to both financial burden and deterioration in quality of life. This article aimed to assess the socioeconomic burden and psychological impact of dermatophytosis, accounting for its chronicity.

Methods: This study included 285 patients aged ≥12 years with previously treated dermatophytosis. Data on demographics, disease characteristics, and treatment patterns were collected. Quality of life was assessed using the Dermatology Life Quality Index (DLQI) and the Short Form-36 (SF-36) questionnaire. …

Online Rights Defense Among Chinese Americans Against Racial Aggression In The U.S. During The Covid-19, Fangzhu Lu, Wenshan Jia

Communication Faculty Articles and Research

Purpose

This study investigates how Chinese American communities responded to heightened racial discrimination during the COVID-19 pandemic by utilizing social media platforms to safeguard their civil rights, articulate collective concerns, and mobilize resistance against racial aggression.

Methodology

Through qualitative case study analysis, the research examines the social media activities of six advocacy organizations, including three X accounts (WashTheHate, Chinese for Affirmative Action, Asian Americans Advancing Justice) and three Instagram accounts (Stop AAPI Hate, Stop Asian Hate, Advancing Justice: AAJC). The analysis focuses on the content strategies and communication mechanisms employed to counteract racial hostility.

Findings

The selected organizations used social …

Press To End Nightmare: Technology, Disfigured Labor, And Retail Grocery Work, Katherine Mott

Dissertations - ALL

This study attends to the lived experiences of retail grocery customer service workers to examine how economic forces, namely the growth of online retail and technological advancements in information systems and data collection, are reshaping retail work. It draws upon in-depth interviews, content analysis, and eight months of participant observation working alongside predominantly college-educated customer service workers at Whole Foods Market, an upscale retail grocery chain with hundreds of locations across the United States, Canada, and the United Kingdom. Prior to the 2010s, Whole Foods Market’s decentralized management structure successfully deployed a hegemonic “post-industrial work ethic” rooted in environmentalism, organic …

"That Has Been My Entire Life Of Being Invalidated," Lgbtq+ And Poor: Experiences Of Cis-Heteronormativity And Neoliberal Poverty Governance In Cities In Upstate New York, Dustin J. Satterfield

Dissertations - ALL

Social welfare provision in the United States is neoliberal, punitive, and more about controlling people than alleviating poverty. Poor people are highly regulated by the state through welfare provision, with social welfare supports reserved for “the deserving poor” (Soss et al. 2011; Katz 2013; Hughes 2019; Purser and Hennigan 2019). Poverty is viewed as a personal moral failing and those seeking benefits must demonstrate their deservedness to be approved. Simultaneously, LGBTQ+ individuals in the US are at higher risk of experiencing poverty than the general US population (DeFilippis 2016; Badgett 2018; James 2016). Queer and trans people are more likely …

A Study On Gender Equality And Geographic Homogeneity In Education And Their Association With Midlife Suicide, Julene Kemp Cooney

Dissertations - ALL

ABSTRACT Suicide consistently ranks among the top five causes of death for the U.S. population aged 25-64, and suicide rates have been rising in the United States since 2000. Although targeted efforts have been made to reduce suicide deaths among high-risk individuals, the upstream, or “contextual,” causes of poor mental health that drive suicidal ideation and completion are fueling a national mental health crisis that is overwhelming available mental health resources, resulting in a significant and needless loss of life. This three-chapter dissertation examines how suicide rates among midlife adults in the United States are associated with several upstream contexts …

Three Essays On Social Security Retirement Age Reform And Its Implications For Older Adults, Halim Yoon

Dissertations - ALL

Rising life expectancy and declining fertility rates have led to rapid population aging in many countries. To address the resulting fiscal pressures on social insurance programs and encourage longer labor force participation among older adults, many countries have reformed their public pension systems. In the United States, the Social Security Amendments of 1983 gradually increased the Full Retirement Age (FRA)—the age of eligibility for full, unreduced Social Security benefits—from 65 to 67. While prior research has extensively examined whether this reform delayed Social Security claiming and retirement, much less is known about its broader and longer-term consequences for well-being, including …

Substance Use From Adolescence To Midlife: The Influence Of Religiosity, Childhood Aversity, And Sexual Minority Status, Joshua Glenn Grove

Dissertations - ALL

Substance use is a leading cause of premature mortality in the United States, with overdose and alcohol-related deaths rising sharply in adulthood and midlife. Religiosity is among the most well-documented social factors associated with lower substance use, operating through community ties, behavioral norms, and meaning-making. Yet despite the life course nature of substance use, research has centered primarily on adolescence, relied on cross-sectional data, and typically employed single measures of religiosity. Consequently, it remains unclear whether religiosity functions similarly across its multiple dimensions or among populations exposed to heightened social disadvantage, including individuals with adverse childhood experiences (ACEs) and sexual …

U.S. Service Member To Counseling Student, Nicole Marie Arcuri-Sanders, Kellie Forziat-Pytel

Educational Sciences and Organizations

This qualitative descriptive study examines the absence of military career pathways for licensed mental health counselors (MHCs) and the impact of this structural limitation on service members' career transitions. Findings indicate that both combat and non-combat veterans pursued mental health counseling due to personal service-related mental health experiences and dissatisfaction with available care while in service. Despite these challenges, many participants expressed a strong desire to continue serving their country as professional counselors. Over half of the participants reported separating from the military because no occupational role existed for licensed MHCs. At the same time, most indicated they would have …

An Approach To Sacred Spaces From The Perspective Of The Connection Between Nature And Health, Ricard Fernàndez Molinet, Sílvia Gili Olmeda

International Religious Tourism and Pilgrimage Conferences

In a context marked by an increasing search for meaning and well-being, sanctuaries are re-emerging as significant spaces within contemporary spiritual tourism. This work proposes an approach to sanctuaries located in natural environments as liminal spaces, in the anthropological sense developed by Victor Turner, where processes of passage, transformation, and the reconfiguration of personal experience are facilitated. Historically, many sanctuaries have been established in places of strong symbolic and ecological significance, often linked to singular natural elements such as mountains, springs, forests, or caves which have been perceived as sites of connection with the numinous. These spaces have functioned not …

How Gyms Should Use Commitment Devices: The Role Of Deposit Contracts In Attracting Consumers, Zehua Hei, Alan Morse

Global Sport Business Journal

Amid growing health concerns, increased competition among fitness centers, and declining staff-to-customer ratios, gym operators are seeking effective ways to reduce customer attrition. Drawing on Prospect Theory, this study examines how commitment devices in gym promotions (e.g., deposit contracts and transformation challenges) influence consumers’ intentions to join a gym. Two experiments with 609 participants (Study 1 = 204; Study 2 = 405) investigated the mediating role of perceived attractiveness and the moderating role of contractual flexibility. Results indicate that membership options incorporating a commitment device were perceived as more attractive, leading to stronger registration intentions. However, this effect was observed …

Freshman Student Sleep And Academic Stress Levels: An Empirical Study For Embry-Riddle Aeronautical University, Julia M. Cortese

Beyond: Undergraduate Research Journal

Receiving an adequate amount of sleep is essential for academic success as it prepares the brain each day for the workload ahead. Sleep deprivation is associated with negative cognitive, emotional, and physical outcomes that may affect academic performance. Currently, Embry-Riddle Aeronautical University (ERAU) does not have any form of sleep education or awareness for first-year, first-semester students, which leaves them susceptible to a cycle of sleep deprivation, academic underperformance, and stress. This study examines the relationship between sleep habits and academic stress among first-semester, first-year students of Fall 2023 at ERAU. This empirical study used a mixed-methods survey with eighteen …

Instructions To Authors, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Journal Acknowledgements And Editorial Board, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Keynote Address And Meeting Program, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Business Meeting Report (Secretary's And Treasurer's Report), Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Sperm Morphology In The Eastern Narrow-Mouthed Frog, Gastrophryne Carolinensis (Anura: Microhylidae), S. E. Trauth

Journal of the Arkansas Academy of Science

Studies by Scheltinga et al. (2002) and Scheltinga and Jamieson (2003) provide the most comprehensive analysis and only review of sperm morphology in Narrow-Mouthed Frogs (family Microhylidae). Of the 490+ species known to occur in this anuran family (Vitt and Caldwell 2014), only 3 are distributed in the United States (Powell et al. 2016), and 2 of these occur in Arkansas (Trauth et al. 2004). Surprisingly, sperm studies on only 12 microhylid species have been conducted (Scheltinga and Jamieson 2003), and no sperm studies are available on any North American species.

Multiple Nuclear Configurations And Microtubular Arrangements In Spermatozoa Of The Western Siren, Siren Nettingi (Caudata: Sirenidae), S. E. Trauth

Journal of the Arkansas Academy of Science

I examined the ultrastructure of spermatozoa of the Western Siren, Siren nettingi, using transmission electron microscopy. My primary objective in this study was to elucidate, for the first time, the unique morphological complexity of biflagellated sperm in this species. This study also represents my fifth addition in a series of investigations that highlight the novel nature of all aspects of spermatogenesis in this salamander I show the basic sperm transverse and sagittal design which includes a nucleus, 2 axial fibers supporting 2 undulating membranes which have 2 axonemes residing at their terminal ends, several circular mitochondria, and several electron-dense masses. …

Binucleation And Seasonal Cycle Of Sertoli Cells In The Western Lesser Siren, Siren Nettingi (Caudata: Sirenidae), S. E. Trauth

Journal of the Arkansas Academy of Science

I examined binucleation and the seasonal cycle of Sertoli cells in the Western Siren (Siren nettingi) using light microscopy and transmission electron microscopy. My primary objective in this study was to report, for the first time, the presence of double nuclei in Sertoli cells in a salamander. This study also represents the sixth contribution in a series of investigations that highlight the novel nature of all aspects of spermatogenesis in this unique salamander. My findings add to a growing list of extraordinary morphological and reproductive features that distinguish this salamander from all other vertebrates.

Distal Urogenital Anatomy And Epithelial Morphology In The Male Eastern Narrow-Mouthed Frog, Gastrophryne Carolinensis (Anura: Microhylidae), S. E. Trauth

Journal of the Arkansas Academy of Science

I investigated the microanatomy of the distal urogenital system in male Eastern Narrow-Mouthed Frogs (Gastrophryne carolinensis) from a small sample (n = 5) collected in central Arkansas in April, May, and July (2021) and May 2022. Specifically, my primary goals were to elucidate the histology of the following: (1) the paired Wolffian (urogenital) ducts caudally from the kidneys to their merging with the urodeum of the cloaca, (2) the structure of seminal vesicles, and (3) the epithelial morphologies among the distal urogenital tract, the posterior alimentary canal, and the cloaca. My histological analysis confirmed the presence of …

Academy Presidents And Institutional Members, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Table Of Contents, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Journal Of The Arkansas Academy Of Science Volume 79, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Language, Life, And Indigenous Knowledge: Cultural Contexts In Advanced Kaqchikel Maya Language Education Approaches To Indigenous Language Revitalization In Kik'aslemal Ri Kaqchikela': An Advanced Kaqchikel Maya Language Textbook, José Israel Herrera

Journal of Maya Heritage

Abstract. This article examines the relationship between Indigenous language revitalization and the continuity of socially embedded systems of knowledge through the case of advanced Kaqchikel Maya language education. Drawing upon scholarship on Indigenous pedagogies, linguistic anthropology, and Indigenous epistemologies, the article explores how culturally grounded approaches to language learning contribute not only to the development of linguistic competence but also to the reproduction of memories, values, and intellectual traditions. Particular attention is devoted to Kik'aslemal ri Kaqchikela': An Advanced Kaqchikel Maya Language Textbook, whose thematic organization and collaborative development illustrate broader processes of knowledge production and cultural continuity. Rather than …

A Scoping Review Of Sycophancy In Large Language Models: Operational And Theoretical Recognition, Kallen Zhou, Manning Littlejohn, Isabella Garrard

Endeavors: Mississippi State Undergraduate Research Journal

As large language models (LLMs) usage grows across different domains, sycophancy, the tendency for output to align with users, is increasingly being recognized as a primary issue arising from applying LLMs into critical areas. Current research has provided a variety of theoretical definitions, mitigation techniques, and quantification for sycophancy. However, there is little to no consistency across different papers. This scoping review seeks to connect different works on LLM sycophancy by identifying themes in theoretical definitions, measurement methods, and inducement techniques of sycophancy. By analyzing 26 papers (preprints, conference proceedings, and journal articles) from arXiv, ACL Anthology, and Scopus, this …

Algorithmic Monocultures In Hiring, Rishi Bommasani, Sarah H. Bana, Kathleen A. Creel, Dan Saul Jurafsky, Percy Liang

Economics Faculty Articles and Research

Many employers screen job applicants with algorithms built by the same few algorithm vendors. We hypothesize that algorithmic monoculture leads to the same individuals and members of the same racial groups facing rejection. We acquire and analyze a novel dataset of 3 million applicants submitting 4 million applications where all the applications are screened by algorithms built by the same vendor. We find clear racial disparities in applicant outcomes. Of all applications submitted by Asian and Black applicants, 14.74% and 25.87% are submitted to positions that adversely impact Asian and Black applicants, respectively, according to U.S. employment discrimination standards. Individuals …