Digital Commons Network^™

Extending Geometric Acoustic Ray Tracing To Multi-Room Environments: A Case Study On Gunshot Sound Transmission Between Adjacent Rooms, Tyler Ton

Theses and Dissertations

Accurate localization of gunshots in multi-room building environments remains a challenging problem in acoustic forensics and public safety applications. Existing approaches model sound propagation within a single room, neglecting the transmission of acoustic energy through walls and other building materials. This thesis presents a study on modeling multi-room gunshot acoustic transmission, combining geometric ray tracing with structural acoustic transmission-loss modeling to generate impulse responses for two horizontally adjacent rooms separated by a shared wall, providing a foundation for future inter-room gunshot localization work. The proposed system uses GSound-SIR, a geometric acoustics engine, to simulate sound propagation in both of the …

Assessing Psychological Trauma And Resilience In Collegiate Ems Providers: A Quantitative Study Of Risk And Protective Factors, Maribeth Olivia Novsak

Theses and Dissertations

Collegiate Emergency Medical Service (EMS) providers are routinely exposed to potentially traumatic events while simultaneously managing academic responsibilities, yet limited research has examined psychological outcomes within this population. The purpose of this study was to examine the relationships among trauma exposure, PTSD symptom severity, resilience, and perceived social support among collegiate EMS providers. A quantitative, cross-sectional design was employed using a self-report survey administered to collegiate EMS personnel across multiple institutions. The final sample consisted of 26 participants. Results indicated that trauma exposure was significantly positively associated with PTSD symptom severity, suggesting that increased exposure to critical incidents is linked …

Wildfire Risk Mitigation Methods To Enhance The Resilience Of Power Systems, Fasiha Zainab

Theses and Dissertations

The resilience of the power system has become increasingly important in recent years and needs to be further enhanced in the future under wildfire conditions. A major concern is the two-way interaction between power systems and wildfires: power systems can ignite wildfires and be disrupted by them. Power system-induced wildfires occur when electrical components, particularly transmission lines, ignite fires due to faults exacerbated by extreme weather conditions. The presence of uncertainties, especially those related to unpredictable weather conditions, makes it difficult to handle and can significantly increase the risk of wildfire. Furthermore, these ignitions not only threaten public safety and …

Rethinking Social Disorganization In Rural America: Persistent Poverty, Institutional Fragility, And Crime, Addison Finch

Theses and Dissertations

Social Disorganization Theory (SDT) links structural disadvantage to crime through mechanisms such as residential instability, weakened social networks, and reduced informal social control in urban neighborhoods. Less is known about whether these mechanisms operate similarly in persistently poor rural communities where disadvantage is enduring rather than destabilizing. This study examines whether variation in poverty intensity predicts county-level crime in nonmetropolitan, persistently poor counties in Kentucky and Tennessee from 2016 to 2023. A balanced county-year panel (N = 344) integrates incident-based crime data with measures of poverty intensity and institutional capacity. Pooled ordinary least squares models with year fixed effects and …

A Governance-Aware Multi-Agent Framework For Enhancing Fairness & Temporal Accuracy In Disaster Response Systems, Md. Ashfaqur Rahman

Theses and Dissertations

Large Language Models (LLMs) have demonstrated significant potential in disaster-response decision support, however, their deployment in high-stakes humanitarian settings raises critical concerns regarding factual reliability, fairness, temporal validity, and governance compliance. Hallucinated outputs, demographic bias, and outdated recommendations can directly impact vulnerable populations and undermine public trust. This dissertation proposes a governance-aware multi-agent framework designed to enhance fairness and temporal accuracy in disaster-response systems through structured Retrieval-Augmented Generation (RAG), verification-driven orchestration, and adaptive correction mechanisms.The proposed architecture decomposes response generation into specialized agents responsible for real-time retrieval, fact-checking, bias auditing, temporal validation, threshold-based correction, and monitoring. By embedding governance constraints …

Fear Of Crime, Intolerance Of Uncertainty, And Trait Worry: A Mediation Model Of Perceived Risk And Victimization Concerns, Nicholai N. Chasseau

Theses and Dissertations

This study examined psychological vulnerability and fear of crime in 538 adults from Trinidad and Tobago. Perceived risk was the strongest predictor of fear, while prospective intolerance of uncertainty predicted fear directly. Mediation was supported among Afro-Trinidadians but not Indo-Trinidadians, suggesting sociocultural differences in cognitive pathways linking vulnerability to fear.

Do Clothes Make The Man? Ftm Crossdressing In The 18th-19th C. Anglo-American World, Aidrian Graber

Theses and Dissertations

This paper seeks to analyze the legacy of "Female Husbands" and other female-to-male crossdressers in the 18/19th c. Anglo-American world and how such people can illuminate the field of transgender history.

Congestion Pricing And Traffic Safety: Evidence From New York City, Mirella Charros

Theses and Dissertations

This paper examines the impact of congestion pricing on motor vehicle collisions in New York City. Using a spatial difference-in-differences approach, the study finds evidence of increased collisions near the congestion boundary, suggesting potential spillover effects and changes in traffic patterns following policy implementation.

Electrical Resilience In Water Treatment Plants: An Extreme Weather And Lightning Protection Study, Genesis Martinez

Theses and Dissertations

Water treatment plants (WTPs) are vital infrastructure systems that depend on sensitive electrical, electronic, and control equipment to ensure the continuous supply of safe drinking water and effective wastewater treatment. As global temperatures rise and climate change accelerates, the frequency and intensity of extreme weather events—such as hurricanes, flooding, and increased lightning activity—are becoming more pronounced. These events pose significant risks to the electrical resilience of water treatment facilities, often leading to power outages, equipment failures, grid instability, and prolonged service disruptions. This report explores the impacts of extreme weather, with a particular focus on lightning and electrical surges, on …

Implementing The Safe System Approach For Speed Management In Utah, Kezia Isabelle Tripp

Theses and Dissertations

Speed management is central to reducing fatal and serious injury crashes. The Safe System Approach, an emerging roadway safety paradigm in the United States, recognizes human error and vulnerability and focuses on minimizing crash severity through coordinated policy, design, and operational strategies. This thesis examines how Safe System Approach principles can be applied to speed management, with a focus on identifying practical countermeasures and implementation strategies relevant to the Utah Department of Transportation (UDOT). A compendium of practice was conducted to evaluate speed management countermeasures and document how cities and state Departments of Transportation are implementing Safe System Approach-based strategies. …

Democratizing National Water Model Streamflow Forecasts Through Cross-Platform Mobile Application Development, Jerson J. Garcia

Theses and Dissertations

The National Water Model (NWM) provides operational streamflow forecasts for 2.7 million stream reaches across the continental United States, yet technical barriers prevent widespread public access to this hydrological infrastructure. This paper presents RIVR (River Information Visualization and Risk), a cross-platform mobile application that transforms National Water Model forecasts into an accessible interface for non-technical users. Built with Flutter, the application deploys to iOS and Android from a single codebase and integrates NOAA forecast APIs, CIROH return-period thresholds, and interactive vector-tile mapping. Performance evaluation across six metrics: application size, startup time, memory consumption, rendering frame rates, API response times, and …

Empirical Benchmarks For Interpreting Effect Sizes In Violent Crime Interventions, Kohta James Matsukawa Hansen

Theses and Dissertations

Criminal justice researchers apply Cohen’s (1988) benchmarks to classify effect sizes as small, medium, or large, despite these standards never being meant for broad, decontextualized use (Cohen, 1988; Gies et al., 2024; Goulet-Pelletier & Cousineau, 2018; Lakens, 2013; Milner et al., 2023). Repeatedly doing so may weaken statistical validity, distort findings, and impede effective policymaking. This study introduces the first effect size benchmarks specifically designed for violent crime interventions.

Using a quasi-meta-analysis framework, 1,605 effect sizes from 104 violent crime intervention studies from the CrimeSolutions clearinghouse were converted to Cohen’s d. Three new discrete benchmarking methods were created using a …

Mscl-X: Meta Supervised Contrastive Learning With Gaussian Prototypes For Robust Few-Shot Open-Set Modulation Classification, Emmanuel Mawuli Agbator

Theses and Dissertations

Automatic modulation recognition has found its way into the core modern-day wireless communication systems whereby intelligent receivers estimate signal formats without any prior coordination with the transmitters. Challenging situations arise in any working radio frequency environment for the conventional modulation recognition systems due to insufficient labeled data, rapidly fluctuating channel conditions, and appearance of plenty other unseen modulation types. Taken together, these challenges raise questions concerning the ability to institute learning frameworks that could perform well on few-shot and open-set conditions. Hence the thesis attempts to address the same by proposing two complementary learning-based frameworks for few-shot open-set modulation recognition …

The Mind Has A Firewall: An Attempt To Preserve Human Mind Integrity., Sayed G. Batran

Theses and Dissertations

This thesis argues for the recognition of mind integrity as a distinct human right. It contends that existing protections, such as bodily integrity, privacy, and freedom of thought, are no longer sufficient to shield an individual’s mental domain from new forms of external interference enabled by neurotechnology, artificial intelligence, and pervasive data-driven systems. Mind integrity is defined as the right to govern one’s own mental life—to form, revise, and hold thoughts, beliefs, and desires based on reasons one endorses—free from significant, non-consensual interference or manipulation, regardless of the method used. The thesis first identifies concrete risks and regulatory vacuums by …

Assessing Public-Sector Readiness For Artificial Intelligence In Egypt, Renad Ahmed Anwar

Theses and Dissertations

Artificial intelligence (AI) is increasingly adopted in public-sector contexts, yet successful implementation depends on organizational readiness, particularly in developing countries. This study assesses the readiness of Egypt’s public sector for AI adoption using a qualitative expert opinion methodology. Semi-structured interviews were conducted with senior professionals from global technology firms with extensive experience working with public-sector entities in Egypt.

Guided by by an integrated framework combining organizational readiness theory, the Technology–Organization–Environment (TOE) framework, and public value and governance perspectives, the study examines strategic, organizational, human, technological, societal, and governance dimensions of AI readiness. The findings indicate that while Egypt demonstrates strong …

Police Supervisor Selection Process And The Need For Uniformity In Practices To Improve Police Leadership In The Usa, Catrina M. Rhatigan

Theses and Dissertations

Effective police leadership is crucial to sustaining the culture shift in law enforcement. Leaders need to lead, and how the executive staff assess their leadership capabilities will determine whether they are up to the task. Police executives need to determine first what their motives are: to fill open supervisory spots? Promote the best leaders? This study and the results highlight the need to focus on the latter, identify the leadership qualities that best fit your department's needs, and work from there. A lack of oversight and inconsistent standards for police supervisors leads to poor policing and inadequate responses to significant …

Determining Knowledge Gaps In Natural Disaster Preparedness: An Exploratory Analysis Of Socioeconomic Variables And Response Quality, Michelle S. Repass

Theses and Dissertations

This exploratory study examines potential knowledge gaps in natural disaster preparedness across socioeconomic groups in Lee County, Alabama and identifies communication barriers affecting response behavior through the lens of the knowledge gap hypothesis. Survey data from 20 residents were analyzed using an objective socioeconomic status (OSES) score based on household income and highest level of education. Results indicate that while most respondents reported access to weather alerts and favorable behavioral responses that align with current guidelines from the National Weather Service, gaps are present in comprehension, response timing, and engagement in risky behavior that could delay protective action. Findings suggest …

Multi-Tier Systems Of Support: A K–12 Case Study, Christopher Foster

Theses and Dissertations

Multi-Tiered Systems of Support (MTSS) has emerged as a widely adopted framework intended to address student academic and behavioral needs through tiered intervention systems and data-informed decision making. While many school districts have implemented MTSS frameworks, variability in implementation across grade levels and school contexts continues to affect the consistency and effectiveness of these systems. The purpose of this qualitative case study was to examine the implementation of MTSS across the K–12 continuum within a public school district in the northeastern United States. The study explored three central areas: the structural features supporting MTSS implementation, stakeholder perceptions of MTSS effectiveness, …

Exploratory Research Into U.S.-Based College/University Population Perceptions And Security Responses To On-Campus Active Shooter Incidents, Donald E. Stanton

Theses and Dissertations

On-campus active shooter incidents challenge U.S.-based Institutions of Higher Learning (IHLs) as they are usually only identifiable after the first shot. My mixed-methods, exploratory study was conducted to fill gaps in the limited research regarding on-campus active shooter incidents. Using purposive sampling, I identified two IHL security directors for the initial qualitative phase of my research. I conducted separate virtual interviews to discuss active shooter-specific responses, policies, procedures, security measures, potential active shooter-specific security systems, and their views on the importance of open-campus learning and social environments. We also discussed their active shooter response postures and whether they believed their …

Analysis Of Risk Factors And Current Programs For Addressing Injuries In Children And Adolescents, Jahfel Nial Jones Iii

Theses and Dissertations

Unintentional injuries are a leading cause of morbidity and mortality among children and adolescents in the United States. These injuries result from various causes, including motor vehicle crashes, falls, suffocation, and poisoning. This capstone project examines the prevalence, risk factors, and prevention strategies for unintentional injuries among infants, children, and adolescents. Using a public health approach, this research explores evidence-based interventions and community-based programs that effectively reduce injury-related mortality. The project also incorporates data and insights from the Safe Kids Columbus program at Piedmont Columbus Regional, where various injury prevention initiatives have been implemented.

Findings revealed that motor vehicle crashes …

Absolute Quantification And Identification Of Rna From Rna-Lipid Nanoparticles Using High Resolution Mass Spectrometry, Jason C. Funderburk

Theses and Dissertations

RNA therapeutics are a rising drug category with potential use for a range of conditions encompassing infectious diseases to therapies for cancer, diseases, and genetic disorders. RNA-lipid nanoparticles (RNA-LNPs) are the prominent delivery method for these therapeutics approved products include mRNA vaccines and polyneuropathy treatments. The emergency use authorizations and orphan drug status of current RNA-LNP drugs has allowed approval without finalization of the regulatory analytical procedures for quality monitoring. The objective of the study was to develop an LC-MS assay to simultaneously measure identity and concentration of two therapeutically relevant intact RNA constructs extracted from RNA-LNPs to enhance quality …

Timing And Stability Of Uav Operations In Smart City Environments: Experimental Analysis And Design Implications, Rabia Ipek Yasar

Theses and Dissertations

This thesis investigates the deployment and performance of unmanned aerial vehicles (UAVs) within the Virginia Commonwealth University Open Cyber City (OCC) testbed. The study focuses on evaluating real-time indoor positioning performance using the Crazyflie drone platform. High-precision position measurements are obtained using the Vicon motion capture system, enabling analysis of the latency between the drone’s actual position and the system-reported position. In a closed-loop control system, the time difference between the position measurement and the application of the control command is called the system delay. Both stationary (hovering) and trajectory-following experiments are conducted to evaluate system performance. Communication delays in …

Framing Belonging And Exclusion: A Dialogic Narrative Analysis Of English- And Spanish-Language Immigration Coverage During The Trump 2024 Presidential Election, Evangeline T. Cruz

Theses and Dissertations

I investigated how English- and Spanish-language news outlets narratively constructed Latinx immigrants during the Trump 2024 presidential campaign, a period marked by heightened anti-immigrant rhetoric and political volatility. While past scholarships examined immigration framing through tone, sentiment, or frequency analysis, limited attention has been given to the deeper narrative structures that shape public meaning-making. This study addresses this gap by applying Dialogic Narrative Analysis (DNA) and Critical Thematic Analysis (CTA) to a bilingual dataset of 120 newspaper articles from The New York Times, Los Angeles Times, El Diario, and La Opinión published between November 2024 and February 2025.

Findings reveal …

Media Disparity? Analyzing The Media Coverage Of Violent Vs. Non-Violent Crimes In Central Arkansas, Alicia Dorn

Theses and Dissertations

The media's disproportionate coverage of violent crimes compared to non-violent crimes may create a skewed public perception of crime rates and safety in Central Arkansas, potentially influencing policy decisions and community relations. This research examines whether news outlets in Central Arkansas cover violent crimes more frequently than non-violent crimes and compares this coverage to actual crime statistics from law enforcement agencies. The study aims to understand the potential impact of media representation on public perception of crime. The study employed a mixed-methods content analysis of three major Central Arkansas newspapers (Arkansas Democrat-Gazette, Pine Bluff Commercial, and Hot Springs Sentinel Record) …

Barriers To Higher Education In Mississippi Prisons: A Systematic Literature Review And Policy Analysis, Ashley Elizabeth Weathers

Theses and Dissertations

Higher education in prison reduces recidivism and improves reentry outcomes, yet Mississippi’s prison education programs remain underdeveloped due to financial constraints, policy challenges, and systemic barriers. While national research on prison education is expanding, Mississippi-specific policy evaluations remain limited. This capstone employs a desk-based research methodology, integrating a systematic literature review and policy analysis to examine these challenges. The study synthesizes recent research on the impact of prison education, funding limitations, and policy frameworks, addressing a critical gap in state-specific policy evaluation. The policy analysis evaluates Mississippi’s correctional education policies and funding mechanisms, using Southwest Mississippi Community College’s (SMCC) Prison …

Quantifying Benefits Of Biochar With Variable Absorption Capacity As A Partial Cement Replacement In Concrete, Benjamin Shannon

Theses and Dissertations

Extensive research has been conducted on biochar-incorporated concrete. However, no concrete mixture design guideline is currently available for implementing biochar incorporation in practice. The objective of this study was to correlate biochar absorption capacity with the compressive strength of biochar-incorporated concrete, to quantify the benefits of biochar and develop mix design guidelines. Biochar with varying absorption capacities was incorporated into concrete at 10%, 20%, and 40%. Strength and moisture loss were recorded over the 90-day curing period of the biochar-incorporated concrete. Results revealed three main findings: (1) in 10%, 20%, and 40% biochar mixes, the normalized strengths ranged from 0.65–0.85, …

‘Cog In The Machine’ Or Social Being? How Digital Communications Affect Social Capital Development In Higher Education Institution Workplaces., Daphne Abigail Knox

Theses and Dissertations

The purpose of this research is to investigate the impact of digital communications on social capital development within the workplace in public institutions of higher education. While previous literature recognizes the potential implications of the internet on areas like social capital (Putnam, 2000; 2020) and formal and informal communications in organizations (Simon, 1997), an in-depth understanding of how modern digital communications impact social capital development is still necessary to address the gap in literature and to analyze the impact of digital communications on the development of organizational social capital. The potential implications of this work on scholarly research include expanding …

Responding To The Urban Canvas: Murals, Preservation, And Placemaking In Meridian, Ms, Katy Kemalyan

Theses and Dissertations

Public murals that depict elements of local culture and history are a creative placemaking tool increasingly used by preservationists invested in the revitalization of their historic districts. As this trend rises, it becomes necessary for preservationists to ask what should be painted, restored, or left alone? Research on public murals neglects Southern mid-sized towns, considerations of existing murals, and historic architecture used as substrates. Rectifying this omission and employing geographic surveys and stakeholder interviews, this study seeks to expand which genres of murals are considered for their creative placemaking value. Normally distinguished primarily by source in literature, community murals, ghost …

Physics-Informed Neural Network For Maximum Detectable Distance Estimation In Mobile Gamma Spectrometry, Nancy A. Ibrahim

Theses and Dissertations

Accurate estimation of the Maximum Detectable Distance (MDD) is critical for environmental remediation, nuclear incident response, and public safety. Conventional approaches assume stationary detectors and rely on computationally intensive simulations, limiting their applicability for mobile, real-time surveys. Mobile gamma spectrometry introduces additional complexities due to detector motion, variable acquisition times, and heterogeneous backgrounds. This study addresses the central question of how effectively a Physics-Informed Neural Network (PINN) can estimate MDD for mobile gamma spectrometry, while maintaining both accuracy and computational efficiency under dynamically changing environmental conditions. A multi-phase approach was employed, combining field data collection, computational modeling, and operational tool …

Evaluating Hail Spectrometer Data Quality And Uncertainty For Calculating Radar Reflectivity Factor, James Klinman

Theses and Dissertations

Reliable in situ measurements are essential for accurately forecasting and nowcasting hailstorms, as they provide insight into storm processes, improve predictions that protect public safety, and help assess potential damage to agriculture and infrastructure. This study evaluates the reliability of in situ hail measurements from the T-28 aircraft’s Hail Spectrometer and assesses their feasibility for radar reflectivity validation and parameterization. Data from 14 flights across five field campaigns were analyzed, focusing on comparisons between one-dimensional (1D) 1-Hz accumulated particle counts and two-dimensional (2D) particle images produced by the Hail Spectrometer. The 2D data were processed using the System for Optical …