Digital Commons Network^™

Accelerating Defensive Cyber Operations Via Unsupervised Log Clustering And Automated Regex Template Synthesis, Charles Matthew Jones

Theses and Dissertations

Modern Security Operations Centers (SOCs) ingest millions of log entries per day, but manual parsing does not scale to the volume, heterogeneity, and rapid evolution of log formats. This dissertation investigates whether unsupervised clustering can automate the generation of candidate field-extraction templates while remaining deployable in production and feasible under realistic runtime and memory constraints. The central research question asks whether a machine-learning-assisted pipeline that proposes extraction templates for security engineer review—relative to reproducible human-authored baselines such as hand-written regular expressions—can measurably improve rule-set deployability and corpus-scale extraction quality. Improvement is quantified using four applicability metrics: Coverage Rate (CR), Exclusive …

Comparison Of Degree Attainment Between Traditional And Nontraditional Community College Transfer Students From The Beginning Postsecondary Students Longitudinal Study, Diann Mills Nichols

Theses and Dissertations

Nontraditional students have been part of higher education for over a century, yet their enrollment has increased substantially in recent decades and is expected to continue rising. Many return to college to gain credentials and skills needed for career advancement or reentry into the workforce. Despite their growing presence, nontraditional students remain less likely than traditional students to complete a degree within six years, often due to competing responsibilities such as work, family obligations, and financial strain. The purpose of this study was to compare nontraditional community college students who transferred to four-year institutions with their traditional counterparts in terms …

The Lived Experiences Of Mississippi School Leaders Addressing Food Insecurity In Their Schools, Krista Vowell Nicholson

Theses and Dissertations

Title of Study: The lived experiences of Mississippi school leaders addressing food insecurity in their schools Pages in Study 135 Candidate for Degree of Doctor of Philosophy Food insecurity among children in the United States remains a significant concern for educational leaders. Researchers have consistently found a relationship between food insecurity and diminished student academic outcomes. The purpose of this qualitative phenomenological study was to examine how school leaders and teachers in schools in Mississippi describe their lived experiences responding to students dealing with food insecurity. The research study included semi-structured interviews with 12 principals and teacher leaders from four …

Plasma Pharmacokinetics Of Topical 0.1% Diclofenac Sodium And 0.5% Ketorolac Tromethamine In Dogs, Jacqueline Peraza

Theses and Dissertations

To determine plasma concentrations of ophthalmic 0.1% (w/v) diclofenac sodium and 0.5% (w/v) ketorolac tromethamine following 4 times daily ophthalmic administration in healthy dogs. Eight dogs were randomly assigned to a diclofenac or ketorolac group. Plasma was collected before drug administration. Plasma samples were collected after the 4 pm treatments on days 1 and 5. Plasma concentrations (ng/mL) were quantified by liquid chromatography-mass spectrometry and analyzed with noncompartmental pharmacokinetic analysis. After ophthalmic administration of 0.1% diclofenac, mean t1/2, Tmax, and Cmax occurred at 3.08 0.9 hours, 121.4 2.8 hours, 0.12 0.05 ug/mL, respectively. The mean t1/2, Tmax, and Cmax after …

In The Pursuit Of Beauty: A Bureaucratic History Of Chicago's Parks, 1860-1900, Jackie L. Perkins

Theses and Dissertations

This dissertation examines how the decentralized and competitive urban government of Chicago regulated not only the material conditions but also the aesthetic beauty of three separate park systems formed in 1869 as a response to Chicagoans’ broad push for improved recreational landscapes in the city. The systems, political entities each governed by its own commission, experienced varying levels of independence from the city of Chicago. As commissioners worked towards the creation of urban parks modeled after the idealized beauty made popular by New York’s Central Park, they encountered the bureaucratic and environmental realities of Chicago, two forces that often worked …

Characterizing The Microbial Structure And Function In Black Soldier Fly Digested Dairy Manure And Subsequent Larvae, Branden N. Pierce

Theses and Dissertations

This work examined the microbial structure and gene expression found in Black Soldier Fly larval guts and their frass when reared on dairy cattle manure that had been amended with either R. rhodococcus 21198, P. polymyxa 8158, or both and compare the results to larvae reared on untreated manure. First an overview of literature surrounding projected global food supplies and the possible use of insects to either increase them or mitigate the environmental effect of producing said supply. A cellulose degradation assay was performed to assist in determining which bacterial species to use as amendments. Characterization of the microbial communities …

Remote Sensing Techniques For Soil Moisture Retrieval And Crop Yield Estimation: Employing Multi-Sensor Receiver Systems From Uas And Ml For Precision Agriculture, Mohammad Abdus Shahid Rafi

Theses and Dissertations

Accurate soil moisture (SM) measurement and crop yield estimation are critical components of modern precision agriculture (PA) management. Efficiently observing SM at high resolution on a sub-field scale can enhance irrigation planning and management, leading to improved yields and product quality while also conserving environmental resources. Yield predictions provide insights into expected production, facilitating optimized resource allocation, improved agricultural management strategies, and enhanced profitability. Unmanned Aircraft Systems (UAS) based multi-sensor receiver systems offer promising solutions in obtaining high-resolution SM measurements across large fields where satellite remote sensing falls short, as well as collecting necessary data over corn and cotton for …

Development And Evaluation Of A Closed-Loop Controlled Ugv With Rtk-Gps Navigation For Plastic Contamination Removal From Cotton Fields, Asifur Rahman

Theses and Dissertations

Plastic contamination in cotton reduces fiber quality, causing an estimated $600 to $750 losses annually for the U.S. cotton industry. This work developed an RTK-GNSS-based UGV navigation for a collaborative UAV-UGV plastic retrieval system. An Amiga rover was adopted and modified, and a closed-loop PD steering control based on cross-track and heading error was developed and deployed in it. The first set of tests was conducted on a 111 m A-B line on a flat lane based on ASABE/ISO 12188-2 guidelines, then repeated in a cotton field. The P50 and P95, and max cross-track errors were about 1, 5, and …

No-Till Versus Conventional Tillage Cover Crop Systems Effects On Cotton In The Blackland Prairie Region Of Mississippi, Mallie West Rivenbark

Theses and Dissertations

Nitrogen (N) plays a critical role in cotton production systems. Management practices such as tillage systems and cover crops (CC) can influence nutrient cycling and availability within the soil. The present study assessed the effects of CC in a conventional tillage (CT) vs. no-tillage (NT) system on cotton yield, fiber quality and N use efficiency. Ramifications for CC and N rates on lint yield and cotton N uptake were investigated during the 2024 and 2025 growing seasons in Verona, MS. Cover crop treatments include cereal rye (Secale cereale), crimson clover (Trifolium incaranatum) and a mix of cereal rye and crimson …

Nesting Ecology And Responses To Snag Resource Fluctuations Of Red-Headed Woodpeckers In Working Pine Forests, Zoe Elise Scott

Theses and Dissertations

Southeastern working pine forests provide opportunities for sustainable management that balance conservation and economic objectives. Red-headed woodpeckers (Melanerpes erythrocephalus), as primary cavity excavators, play a disproportionate role in forest ecosystems, making them an ideal focal species for evaluating management strategies. From 2024-2025, we monitored 103 nesting attempts in loblolly pine (Pinus taeda) forests of Mississippi and Alabama, assessing nest site selection and survival. Nests were concentrated in early successional stands, with selection favoring taller snags with advanced decay characteristics, greater understory cover, and north-to-west cavity orientation. Nest survival increased with reduced cavity accessibility. Simulation models of varying snag retention levels …

Intersection Of Food Insecurity And Housing Among Veterans And Disabled Adults, Julie Anne Stepp

Theses and Dissertations

This study examines how housing tenure is associated with food insecurity (FI) among veterans and adults with disabilities, utilizing the housing-food insecurity nexus framework. Previous research documents elevated FI among veterans and individuals with disabilities, yet few studies assess housing tenure as a mechanism connecting these statuses to food hardship. Using data from the 2024 National Health Interview Survey Adult Sample (n=32,629), logistic regression models estimate the independent and interactive effects of renting, veteran status, and disability status on FI. Results suggest renters have significantly higher odds of FI than homeowners, even after adjusting for poverty status, SNAP participation, and …

Liposomal Bupivacaine Caudal Epidural In Horses Results In Adverse Effects Without Analgesia, Christopher Stokes

Theses and Dissertations

Liposomal bupivacaine (10 mL; 1.3%) was administered into the caudal epidural space via an indwelling epidural catheter. Mechanical nociceptive threshold (MNT) testing with pressure algometry was used to measure analgesia at 4 anatomic locations for 72 hours following injection. Physical examinations were performed and ataxia scores recorded every 4 h to monitor for adverse effects, and fecal and urine output were recorded. There were no significant differences at any time point in rectal temperature, heart rate, respiratory rate, or MNT at any anatomic site compared to baseline. Ataxia scores were significantly elevated from 24 to 36 h following epidural injection. …

Impacts Of Goat Grazing On Coastal Upland Understory, Maya Stratman

Theses and Dissertations

Coastal upland pine savannas and flatwoods along the northern Gulf of Mexico are biodiversity hotspots degraded by woody encroachment following fire suppression and loss of herbivory. Conservation grazing has been proposed as a management tool, yet its effectiveness in these systems remains understood. This study evaluated how goat grazing frequency and duration influence understory vegetation structure, diversity, productivity, and light availability in an Ilex-dominated coastal upland in Mississippi. Five grazing treatments (monthly, every three months, biannual, seasonal, and ungrazed control) were applied across 25 plots over one year. Vegetation percent cover, genus richness, Normalized Difference Vegetation Index, light penetration, and …

Variation In The Sonographic Appearance Of The Liver In Cats With Lymphomatous Hepatic Infiltration., Charlee Sturkie

Theses and Dissertations

Lymphoma is the most diagnosed neoplasm in domestic cats, and abdominal ultrasound is often included as a component of the diagnostic plan. The aim of this study was to determine if changes in sonographic appearance of the liver as well as the presence of free fluid, lymphadenopathy, and splenic abnormalities increase the likelihood of diagnosis of lymphomatous hepatic infiltration in cats diagnosed with lymphoma. Fifty-eight cats were enrolled in this combined retrospective and prospective study, 22 with lymphomatous infiltration in the liver and 36 without. In the current population hypoechogenicity, heterogeneous echotexture, hepatomegaly, and the presence of nodules within the …

Students’ College Choice: Factors Influencing The Decision To Attend A Particular College, Miss Thompson Gordon

Theses and Dissertations

Community colleges play a vital role in expanding access to higher education by offering affordable and flexible opportunities for diverse learners, including many who face academic and socioeconomic challenges. This qualitative phenomenological study examined the factors that influence high school seniors' decisions to attend a particular college. Guided by Hossler and Gallagher's (1987) three-stage college choice model of predisposition, search, and choice, the research explored how students gather information; the influence of family, peers, and school personnel; and the importance of college characteristics such as cost, location, and campus environment. Data were collected through semi-structured interviews with ten high school …

The Role Of Math Anxiety – And Associated Support Mechanisms And Strategies – In The Academic Success Of Stem College Students, William Jacob Tschume

Theses and Dissertations

Math anxiety has been widely documented as a barrier to student success, yet its role within institutional student success frameworks – particularly in gateway STEM courses – remains underexamined. The purpose of this quantitative study was to examine the relationship between math anxiety, academic support mechanisms, and academic performance among undergraduate STEM students enrolled in a gateway mathematics course at a large, public, research-intensive university. Guided by the Debilitating Anxiety Model, student success frameworks, Social Cognitive Career Theory, and equity-oriented perspectives, this study addressed three research questions: (1) how student demographic characteristics relate to levels of math anxiety, (2) the …

Exploring The Effect Of Students' Exclusionary Discipline On Their Academic Achievement In A Rural High School., Danya Turner

Theses and Dissertations

The purpose of this quantitative study was to examine the extent to which exclusionary discipline practices, specifically in-school suspension and out-of-school suspension, are associated with academic achievement among high school students. More specifically, the study investigated the relationship between students’ exclusionary discipline days and performance on Mississippi Academic Assessment Program (MAAP) assessments in Algebra I, Biology, English II, and U.S. History. The study was guided by the Opportunity to Learn (OTL) framework, which emphasizes the importance of access to instructional time for student academic success. Archival discipline and assessment data were collected from a rural public high school in east-central …

Investigating The Evolution Of Shear Failure In Cross Laminated Timber (Clt) Transverse Layer Using Acoustic Emission, Harika Undadi

Theses and Dissertations

Cross-laminated timber (CLT) is susceptible to rolling shear failure in the transverse layers. This study evaluated the rolling shear failure in southern pine (Pinus spp.) and yellow poplar (Liriodendron tulipifera) CLT panels using block shear, delamination, and interlaminar shear tests. Acoustic emission (AE) monitoring was integrated with video recording to capture structural damage while loading. The results showed rolling shear failure as the dominant failure mode in the transverse layer. The AE energy and the load-displacement curve were classified into stages і) deformation stage with negligible AE signals (elastic behavior); ⅱ) crack propagation stage with increased AE signals; and ⅲ) …

Effects Of Melatonin Supplementation On Exercise Induced Stress In Horses, Hannah Clark Valigura

Theses and Dissertations

Exercise is a necessary component of athletic conditioning but imposes substantial physiological stress on horses, resulting in oxidative stress, inflammation, muscle damage, and thermal strain that can impair performance and recovery. Melatonin, a neurohormone with potent antioxidant and thermoregulatory properties, has been proposed as a novel nutritional strategy to mitigate these effects. This dissertation aimed to (1) characterize serum melatonin concentrations following oral supplementation, (2) evaluate the effects of melatonin on oxidative stress, inflammation, and muscle damage biomarkers after exercise, and (3) examine its influence on physiological parameters during exercise under warm weather conditions. Across a series of controlled experiments …

Tracing Hazing Across Adolescence: Examining How Prior Hazing Experiences Shape Hazing Motivation And Tolerance Among Newly Initiated Ifc Fraternity Members, John Michael Vanhorn

Theses and Dissertations

Hazing remains pervasive and underreported, disproportionately affecting adolescent and emerging adult men, particularly within athletic teams and fraternity contexts. Although hazing is most often studied within collegiate organizations, many students encounter hazing behaviors prior to college, yet little is known about how these early experiences shape later hazing perceptions, motivations, tolerance, and masculine norms. Grounded in Bronfenbrenner’s Process-Person-Context-Time (PPCT) model, this dissertation conceptualizes hazing as a developmental process shaped by repeated social interactions, individual characteristics, contextual environments, and time across adolescence and emerging adulthood. Using a two-paper approach with a quantitative, longitudinal survey design, study 1 examined fraternity new members’ …

Delayed Timing Of Spring Application Of Nitrogen In Corn, Elizabeth Mae Worley

Theses and Dissertations

Application timing of nitrogen (N) fertilizer within the corn growing season can be crucial to crop nutrient uptake and availability. A lack of region-specific timing recommendations may result in inefficient fertilizer use and inconsistent yield responses. The objectives of this study were to determine how late in the growing season a first and second N fertilizer application can be pushed until corn yield is impacted and investigate whether Growing Degree Days (GDDs) should be used as better estimate of timing for N application than calendar date or growth stage. First applications were able to be delayed until V4-V6 growth stages …

Assessing The Relationship Between Subsurface Geology And Surficial Geomorphology: Remotely Predicting Geologic Features And Geohazards Using An Elevation-Trained Machine Learning Algorithm In The Northern Gulf Of Mexico, Allison L. Wing

Theses and Dissertations

This thesis evaluates the capacity to predict subsurface geologic features and submarine landslide susceptibility using surficial geomorphology derived from bathymetric elevation data in the Northern Gulf of Mexico. Quantitative geomorphic variables including slope, curvature, aspect, rugosity, geomorphons, and Bathymetric Position Index were generated from 30-meter digital elevation models and used as explanatory variables in presence-only Maximum Entropy models. Known locations of faults, pockmarks, mud volcanoes, hydrocarbon seeps, and landslides (particularly intact scarps) were used to train and validate predictive models through k-fold cross validation. Model performance was assessed using omission rates and AUC values. Results demonstrate that specific geomorphic signatures, …

Multisystem Complications In Spinal Muscular Atrophy Type Iii: Chronic Respiratory Failure And Intractable Epilepsy, Olivia R. Kaufman, Christopher M. Ahmad, Samira Haberman, Curtis King

Student Publications

Spinal muscular atrophy (SMA) is a rare neuromuscular disorder characterized by progressive motor weakness with multisystem involvement. Type III SMA, also known as Kugelberg-Welander disease, typically presents in childhood and allows survival into adolescence and adulthood, during which cumulative complications may emerge. We report the case of a 19-year-old female patient with genetically confirmed SMA type III (zero copies of SMN1, two copies of SMN2) whose disease course was complicated by chronic respiratory failure with hypercapnia requiring non-invasive ventilation and intractable generalized epilepsy. She was born prematurely at seven and a half months via emergent cesarean section for placenta previa …

Reconciliation: An Auditory Exploration Of Redemptive Suffering, Emily Eid

MFA in Visual Art

Reconciliation examines the intersection between chronic pain, Catholic theology, and contemporary sound art through the lens of radical honesty. It documents a dramatic aesthetic and spiritual pivot in my art practice, moving from grotesque, abject portrayals of agony to a hopeful representation of redemptive suffering. I share how the project evolved from an installation of anthropomorphic furniture to a sculptural work using my bed, to an audio piece presented in a semi-private “confessional booth,” all while challenging the misconceptions surrounding chronic pain and disability. Utilizing the theories of Roland Barthes, I break down the semiological and authorial aspects of the …

Subclinical Neuropsychiatric Trait Variation In Parents Of Children With Autism Spectrum Disorder: A Cohort Study, Lindsay J Mullin, Carolyn Lasch, Natasha Marrus, Et Al.

2020-Current year OA Pubs

BACKGROUND: Many neuropsychiatric conditions share overlapping features underpinned by shared genetics. In this study, we examined the co-aggregation of sub-threshold variation in neuropsychiatric phenotypes in biological parents of autistic children to provide insights into the intergenerational transmission of genetic liability for autism.

METHODS: Autistic, neuropsychiatric (i.e., anxiety, depression, ADHD), and cognitive traits were characterized in biological parents of children enrolled in a longitudinal developmental study: 189 families of autistic children and 100 families with no autistic children were included. Families were further characterized as having only one (simplex) or more than one (multiplex) autistic child. Maternal and paternal traits were …

Exploring Bidirectionality In Global Health Partnerships: Perspectives From U.S. Pediatric Residency Programs., Anik Patel, Pauline Kamau, Justus Simba, Ashley Combs, Adelaide Barnes, Kathy Ferrer, Heather Haq, Duncan K. Hau, Lee Morris, Brittany Murray, Amy Rule, Reena P. Tam, Lisa Umphrey, Megan S. Mchenry

Manuscripts, Articles, Book Chapters and Other Papers

Introduction Despite growing interest, little guidance exists to re-evaluate global health partnerships (GHPs) through promoting bidirectionality. This study aims to understand the perspectives of United States (U.S.) pediatric global health (GH) faculty on institutional bidirectional practices to inform future discussions with international collaborators. Methods An internally, iteratively developed REDCap-based online survey (REDCap, Vanderbilt University, Nashville, TN), by our diverse author group, collected qualitative data from January 18 to February 20, 2023. Free-text responses were reviewed and coded inductively, with findings framed to generate themes for subsequent engagement with international partners. Results Of the 88 U.S. programs that identify as having …

Quadriceps Tendon Versus Patellar Tendon Autograft For Primary Acl Reconstruction: A Matched-Pairs Analysis At 3, 6, And 9 Months, Grant Gueller, Steven Higbie, Walter Lowe

Summer Research Program Abstracts

No abstract provided.

Multiscale Modeling Of Chemoattractant-Guided Collective Cell Migration In The Drosophila Egg Chamber, Lara Scott, Bradford E. Peercy, Meghan Kwon, Michelle Starz-Gaiano

Biology and Medicine Through Mathematics Conference

No abstract provided.

Impact Of Innate, Adaptive, And Cellular Immunity On Viral Reproductive Cycle: A Stochastic Extinction Analysis, Rahnuma Islam, David Swigon

Biology and Medicine Through Mathematics Conference

No abstract provided.

Modeling Epidemic Dynamics With Renewal Processes And General Lifetime Distributions, Divine Wanduku, Divine Wanduku

Biology and Medicine Through Mathematics Conference

No abstract provided.