Digital Commons Network^™

Physiological Impacts Of Plastic Ingestion On Sea Turtles, Heather Seaman

Electronic Theses and Dissertations

Over the years, plastic production has increased to astonishing numbers and is predicted to continue. Over time, environmental plastic will degrade into smaller pieces, which sea turtles can mistake for prey. Chemicals associated with plastics have been identified in tissues of sea turtles, and some are suspected to be endocrine disruptors. Sea turtles are known to ingest plastics, but more information is needed to illuminate the potential physiological impacts plastic chemicals may have on sea turtles. This study compared plastic ingestion and toxicant levels across species and ontogenically, as different species and life stages inhabit different areas which will influence …

Dynamical Pathways Of Fear And Anger: Testing The Predictive Validity Of The Basic Evaluation Process Framework, Maryana Borri Madeira

Electronic Theses and Dissertations

The present study tested the predictive validity of the Basic Evaluation Process framework by examining whether Fear and Anger emerge as competing emotional attractors during threat appraisal. Using a mouse-tracking paradigm with audio recording, fifty participants reasoned aloud about a self-selected threatening situation while continuously rating their Fear and Anger. Cross-correlation analysis confirmed dynamic dependence between Fear and Anger, although the coupling was positive rather than negative, indicating co-activation rather than mutual suppression. Vector field analysis identified stable attractor structures for all participants, but the distribution of primary attractors across the Fear by Anger state space did not reveal a …

Enhancing Rapid Reef Resilience Through Transplantation Of Thermally Tolerant Corals In OʻAhu, HawaiʻI, Allison M. Klein

Electronic Theses and Dissertations

Coral reefs are increasingly threatened by marine heatwaves, disease outbreaks, and other anthropogenic stressors, leading to widespread declines in coral cover worldwide. As a result, efforts are increasingly focused on identifying thermally tolerant corals for reef restoration. However, it remains unclear whether thermal tolerance is maintained following transplantation and whether thermally tolerant corals perform differently in novel environments. This dissertation examined thermal tolerance, survivorship, symbiont communities, and growth in two dominant Hawaiian reef-building corals, Montipora capitata and Porites compressa, using a reciprocal transplant experiment between Kāneʻohe Bay and Ulupaʻu, Oʻahu. Initial heat-stress assays showed high thermal tolerance in both …

Noisy Neighbors: Assessing The Effects Of Anthropogenic Noise On Non-Native Vervet Monkeys’ (Chlorocebus Sabaeus) Behavioral Responses Via Predator-Call Playbacks In Dania Beach, Florida, Jaela Perry

Electronic Theses and Dissertations

South Florida hosts a number of non-native wildlife species, including African monkeys. This study examined wild vervet monkeys (Chlorocebus sabaeus) in Dania Beach, Florida, to determine whether aircraft-related atmospheric noise affected their threat detection capabilities and behavioral responses. Using predator-call playbacks and focal scan samples, behavioral data was recorded across pre-, during-, and post-playback phases. Behaviors were labeled as nonvigilant or vigilant. The study also assessed whether responses differed between the local and novel predator calls as well as whether repeated trials suggested habituation over the course of the experiment. Results showed that the monkeys’ abilities to successfully …

Hippocampal “Timing Interval Cells” Exhibit Scalable Dynamics For Explicit Timing, Kori-Anne Citrin

Electronic Theses and Dissertations

The ability to organize experiences in time is fundamental to episodic memory and enables animals to predict and guide future behavior. Hippocampal time cells are thought to provide a neural representation for the temporal component of memory. However, time cells have been observed in working memory tasks where animals were not required to keep track of elapsed time. Therefore, it remains unclear what are the hippocampal patterns of activity during explicit timing. Here, utilizing behavioral perturbations and calcium imaging in dorsal CA1, we identified a previously unknown pyramidal neuron subpopulation that flexibly scales its activity during explicit timing. As head-fixed …

Who Do You Think You’Re Talking To? A Longitudinal Study Of How Disclosed Partner Identity Shapes Relational Communication With Ai Among College Students, Vito Anthony Borio

Electronic Theses and Dissertations

This study presents a longitudinal, two-condition, between-subjects experiment in which partner identity is disclosed as either human or AI in text-based chat; however, all participants (N = 60) interacted with the same chatbot. Informed by both Social Information Processing Theory (SIPT; Walther, 1995) and the Computers Are Social Actors Paradigm (CASA; Nass & Moon, 2000), this design draws on the former’s longitudinal measurement tradition to empirically test whether its predictions hold, using the latter as both a framework and procedure for investigating chatbot interactions. The findings inform both theories, indicating that perceived partner identity significantly affects perceptions of relational …

Object Avoidance Onboard An Autonomous Underwater Vehicle In Support Of Geomagnetic Based Navigation System, Eric Benavidez

Electronic Theses and Dissertations

The objective of this thesis was to collect and analyze magnetic field data in the vicinity of the Mercy, Tracey, and Jay Scutti with an autonomous underwater vehicle (AUV) and a forward mounted magnetometer. The collected data was used to develop geomagnetic contour maps and magnetic thresholds of known anomalies to compare the results with validated sources such as NOAA.

In addition, this collected data was used to develop a Gazebo simulation which accurately modeled the magnetic field data and ocean effects of the Fort Lauderdale Shipwreck Trail. This Gazebo simulation allowed for proper testing and refinement of object avoidance …

Evaluation Of Microwave Treatment Of Pfos-Laden Granular Activated Carbon, Rachel Melo Fonseca

Electronic Theses and Dissertations

This study investigated the microwave treatment as a potential regeneration approach for PFOS-laden granular activated carbon (GAC). PFOS was used as a model legacy PFAS, and calcium was selected to examine how inorganic constituents may influence PFAS loading and fluorine behavior during treatment. Microwave temperature profiling showed that GAC temperatures increased with treatment time and power level, reaching approximately 400-950°C. Selected microwave conditions reduced PFOS-derived extractable organic fluorine (EOF), with apparent EOF reduction increasing from 65.5% after 1 min to 96.8% after 4 min. Calcium increased PFOS-derived EOF loading before microwave treatment but did not show a consistent effect on …

A Dynamics Viewpoint On The Approximation Capabilities Of Infinite-Depth Neural Networks, Andreus Brammer

Electronic Theses and Dissertations

Neural Ordinary differential equations(Neural ODEs) provide a continuous-time framework for learning dynamical systems by representing the evolution of a state variable through a parameterized differential equation. While most existing methods rely on numerical time stepping methods during training such as RK4, this work investigates an alternate spectral framework where both the solution and the time-dependent network parameters are represented by global polynomial expressions.

Two methods are employed: the first uses Taylor series representations, and the second approach uses Chebyshev polynomial expansions together with fast spectral transforms and efficient polynomial multiplication techniques. In each formulation, the Neural ODE is transformed into …

A Charcoal Analysis At The Jupiter Inlet 2 (8pb35) Site In Jupiter, Florida, Christopher Rubido

Electronic Theses and Dissertations

This project utilizes five sediment core samples from the Jupiter Inlet Lighthouse archaeological (8PB35) site in northern Palm Beach County, Florida (four core samples derived from areas where cultural material has been found and one core from a nonanthropogenic area). These sediment core samples were analyzed using a variation of a tested charcoal analysis methodology often used with lake and peat bog cores, but in this case, the cores come from an upland coastal environment. The findings of this project have shown efficacy of the modified methodology for locating charcoal peaks in habitation zones found in core strata and as …

Intra-Individual Cognitive Variability As A Predictor Of Mild Cognitive Impairment In Older Adults: Longitudinal Patterns, Clinical Classification, And Sex Differences, Joshua Conniff

Electronic Theses and Dissertations

Some older adults score differently on the same cognitive test from one visit to the next, and that inconsistency has been proposed as an early warning sign of decline. This dissertation tested whether within-person variability actually tells us anything useful about who has, or will develop, mild cognitive impairment (MCI). A total of 334 older adults completed quarterly neuropsychological testing over three years as part of a larger longitudinal study. Visit-to-visit variability was measured as the mean absolute successive difference on the MoCA, the MMSE, and a battery of memory, executive, language, and visuospatial tasks, and MCI was classified from …

Understanding The Experience Of Separation On The Substance-Exposed Mother-Infant Dyad, Tamara Lee Depascale

Electronic Theses and Dissertations

Maternal-infant separation following birth is a profoundly distressing experience that may have significant emotional, relational, and health implications for mothers with substance use disorders (SUD). Guided by Caring Science and Swanson’s Theory of Caring, the purpose of this qualitative descriptive study was to explore the dimensions of the health challenge associated with maternal-infant separation among mothers with SUD following birth and the approaches mothers used to navigate and respond to that experience. Data were collected through semi structured interviews with mothers who had experienced separation from their infants following birth and analyzed using deductive and inductive thematic analysis. Findings revealed …

Slowing Down With The Archives: Reexamining An Archaeological Context From Pre-Columbian Coastal Ecuador, Madison Rieth

Electronic Theses and Dissertations

Archaeological excavations leave behind extensive paper trails and repositories of materials. When these materials are transformed into an archive it disjoints the archaeological process and increases the possibility for knowledge loss. The archive from Salango Site 141C showcases this. These materials have remained in storage or on display since their original excavation and over time the understanding and significance of the site has been lost. Utilizing the theoretical framework of slow archaeology, this thesis analyzes the various parts of the archive from 141C. Using both mortuary archaeology and skeletal analysis, these parts of the archive are reconciled, compared, and integrated. …

Repeated Disasters, Evolving Plans: Flood Mitigation Strategy Change Across Pre- And Post-Disaster Planning Periods In High-Loss U.S. Communities, Jenifar Selim

Electronic Theses and Dissertations

This research explores how flood mitigation planning has evolved in counties exposed to multiple billion-dollar flooding disasters. The research focuses on two case studies: Jefferson County, Texas, and Jefferson Parish, Louisiana, two Gulf Coast communities with repeated flood exposure. Using comparative content analysis of pre- and post-disaster hazard mitigation plans, the study evaluates how local planning approaches and strategies shift following major flood events. Findings indicate that local governments largely remain reactive rather than proactive; however, these efforts are increasingly expanding beyond traditional infrastructure to incorporate broader resilience strategies, including nature-based solutions and regional coordination. The results highlight a gradual …

Enhancing Ecological Resilience: Evaluating Peanut Island's Breakwater Impacts On Coral Reef And Shoreline Dynamics, Dayana Castillo

Electronic Theses and Dissertations

Anthropogenic shoreline modification and inlet-driven hydrodynamic processes can alter sediment transport pathways and sediment deposition in adjacent coral reef environments. This study evaluated how coastal engineering structures, sediment transport dynamics, and localized hydrodynamic processes influence sediment distribution and coral-associated habitats at Peanut Island, Florida. Beach profile surveys, shoreline mapping, sediment grain size analyses, coral monitoring, and historical aerial imagery were used to assess shoreline variability, sediment characteristics, and long-term shoreline evolution between October 2024 and July 2025. Results indicated that much of the eastern shoreline remained relatively stable, while greater variability was observed along the southern shoreline adjacent to the …

Legislative Signals And Human Rights Advocacy: A Longitudinal Analysis Of U.S. Congressional Resolutions And Ngo Reporting In The Post-Cold War Era, 1989-2004, William J. Manosh

Electronic Theses and Dissertations

This thesis examines the unique relationship between nongovernmental human rights reporting, and U.S. congressional attention during the post-Cold War period, 1989-2004. Using a longitudinal content analysis research method, it compares human rights-related resolutions from the 101st through 108th Congresses with materials from Amnesty International, Human Rights Watch, and Human Rights First. Rather than claiming causation, the study evaluates whether congressional country or issues mentioned overlapped with NGO reporting during those same sessions. The findings show recurring overlap between congressional attention and NGO-identified countries, abuses, and normative claims. This convergence suggests that NGOs operated within a democratic information environment yet simultaneous …

Voices Of The Homeless: Phenomenological Portraits Of Parental Engagement Among Parents Experiencing Homelessness, Geneva Marie Winterbottom

Electronic Theses and Dissertations

Family homelessness is a widespread crisis that disrupts the educational experiences of thousands of children, including South Carolina where rates of family homelessness continue to grow. Although research has explored families and homelessness, limited research has focused on the parental engagement of homeless parents. This study explored the parental engagement among homeless parents in South Carolina.

Guided by van Manen’s (1990) interpretive phenomenology, four parents residing in a South Carolina homeless shelter participated in semi-structured interviews and created self portraits, which were analyzed using the hermeneutic circle to derive phenomenological insight.

Findings revealed that parental engagement while homeless was like …

Material Affecting Design (Mad): How Living Biomaterials Reshape Computational Design Through Biological Transformation, Abolhassan Pishahang

Electronic Theses and Dissertations

Living biomaterials grow during fabrication, making strategy selection a design problem distinct from conventional form-making. This dissertation investigates how Pleurotus ostreatus mycelium and Triticum aestivum plant roots reshape the computational design process through their biological behavior. The central argument is that when a designer works with living matter, the material participates in forming, changing the decisions made, the strategies chosen, and the framework required. This relationship between biological transformation and computational design is named the Material Affecting Design (MAD) framework. The research was conducted through a research-through-design methodology grounded in American pragmatist philosophy, particularly the work of Dewey, James, and …

Deviant By Design: How Institutional Forces And Analyst Scrutiny Shape Financial Policy Deviance And Convergence, Jonathan W. Hensley

Electronic Theses and Dissertations

This dissertation explores the institutional and economic forces shaping corporate financial policy, specifically examining why firms deviate from industry-typical leverage and cash holdings, whether they converge toward these norms, and the performance implications of such trajectories. I develop a framework, rooted in institutional theory and dynamic capital structure literature, that characterizes firms with extreme, multi-year financial policies as "deviant by design." While managers might maintain non-normative leverage or cash positions for firm-specific efficiency gains, these choices often clash with established industry templates, leading to legitimacy costs and institutional pressure for conformity.

Using a longitudinal panel of U.S. public firms from …

Privacy-Preserving Intrusion Detection For The Internet Of Medical Things Using Ensemble And Federated Learning, Theyab Alsolami

Electronic Theses and Dissertations

The rapid proliferation of the Internet of Medical Things (IoMT) has transformed healthcare by enabling continuous monitoring, intelligent diagnostics, and data-driven clinical decision-making. However, this increased connectivity has significantly expanded the attack surface of healthcare systems, exposing sensitive patient data and critical medical devices to cyber threats such as intrusion and data exfiltration attacks. Ensuring both strong security and strict privacy preservation in IoMT environments remains a fundamental and unresolved challenge.

This dissertation investigates the design and evaluation of robust and privacy-preserving intrusion detection systems (IDS) for IoMT networks using advanced machine learning techniques. The research first examines the effectiveness …

A Modest Proposal For Discourse Analysis In Nonbinary Communities: Method And Case Study, Nikoli Michael Daigneault

Electronic Theses and Dissertations

While linguists have long used discourse analysis to study language variation in binary and nonnormative gender groups, nonbinary people have often been excluded from analyses or treated without a nonbinary-informed framework. Nevertheless, nonbinary language use can provide key insights into the relationship between gender and language. In this thesis, I propose Nonbinary Discourse Analysis, a set of recommendations and best practices for conducting discourse analysis in nonbinary communities. These methods are informed by previous empirical research on nonnormative gender identities and theoretical work in trans linguistics (Zimman, 2020) and trans epistemologies (Nordmarken, 2019; Raclaw, in press). To demonstrate the methodology, …

Characterization Of Various Corrosion-Resistant Rebars Embedded In Concrete After 20 Years Of Exposure, Samantha Mavrak

Electronic Theses and Dissertations

In aggressive marine environments, the deterioration of reinforced concrete structures is primarily caused by chloride-induced corrosion of embedded carbon steel reinforcement, resulting in concrete cracking, spalling, and costly maintenance or premature replacement. Corrosion-resistant reinforcement has been developed to mitigate these effects; however, long-term field performance data remain limited. This study evaluates the long-term corrosion performance of several corrosion-resistant rebars embedded in simulated deck slab concrete specimens following approximately 20 years of chloride exposure.

Concrete specimens containing 304SS, 316SS, and 2304 duplex SS, two types of clad reinforcement (316SS with carbon steel core), and an intermediate alloy with 12% Cr were …

Movement And Distribution Dynamics Of Predatory Fishes In The St. Lucie Estuary, Sarah Fae Leonowicz Torre

Electronic Theses and Dissertations

Estuaries are productive but highly variable ecosystems that support recreationally and commercially valuable fisheries, as well as species of conservation concern. However, coastal development, habitat loss, altered freshwater inflow, and declining water quality can modify the environmental gradients that structure fish distributions. In the St. Lucie River and southern Indian River Lagoon, located in southeast Florida, managed freshwater discharges, watershed runoff, shoreline modification, and degradation of essential fish habitats (e.g., seagrass, oyster, and mangrove forests) have altered estuarine conditions.

This dissertation evaluates how four estuarine fish species with contrasting life histories respond to environmental variability, hydrologic disturbance, and habitat structure …

How Children Recognize Emotions: Familiarity, Emotional Information Processing, And Autism Spectrum Disorder, Katy Wagner Brooks

Electronic Theses and Dissertations

The ability to identify facial emotional cues is an important nonverbal communicative skill that may be impaired in individuals with Autism Spectrum Disorder (ASD), although prior research has produced inconsistent findings regarding the nature and extent of these impairments. The present study examined facial emotion recognition (FER) abilities in 105 children aged 3 to 8 years, including 32 children with ASD and 73 typically developing (TD) children. Relationships between FER performance and resting-state electroencephalographic (EEG) activity were explored in a smaller subsample. The study investigated effects of emotion type, facial familiarity, emotional intensity, and stimulus presentation format (dynamic versus static) …

Enhancement Of A Copolyester’S Impact Resistance Via Inorganic Reinforcement, David Felipe Gonzalez

Electronic Theses and Dissertations

Thermoplastic copolyester elastomers (TPEEs) are widely used in engineering applications because of their flexibility, toughness, and chemical resistance. However, prolonged exposure to marine environments can reduce their mechanical performance through moisture-induced degradation. This research investigated the use of titanium dioxide (TiO2) nanoparticles and APTES-functionalized TiO2 nanoparticles to improve the mechanical, thermal, and environmental durability of Hytrel 5556. Nanocomposites containing 1 wt.% and 2 wt.% TiO2 were fabricated through melt blending and compression molding. Mechanical properties were evaluated through tensile, compression, flexural, and impact testing, while thermal behavior was characterized using differential scanning calorimetry (DSC). Nanoparticle dispersion was examined using scanning …

Nurse Staffing Variation Viewed Through The Lens Of Institutional Isomorphism, Mara Raggi

Electronic Theses and Dissertations

Nurse staffing is strongly associated with organizational and patient quality outcomes. Existing studies have not adequately explained why nurse staffing levels vary across hospitals operating under similar external institutional isomorphic pressures. Secondary and administrative datasets, along with random-effects regression models, were used to analyze 6 years of data (2014-2019) and examine the relationship between institutional factors and hospital nurse staffing in the general acute care setting. The results indicate that coercive factors of state laws were significantly associated with nurse staffing. Staffing mandates and staffing committees were significantly associated with increases in nurse staffing, while public reporting was significantly associated …

Sophisticated Song: Exploring The Evolution And Ontogeny Of Large Repertoires And Syntax Usage In The Bachman’S Sparrow (Peucaea Aestivalis), Heather Jean Wolverton

Electronic Theses and Dissertations

While humans have the most complex vocal communication system, many of the features that make human language so intricate can be found in other taxa. One building block of language commonly studied in animal communication is syntax, or the organization of vocalizations. Birds, wolves, and cetaceans all display complex vocal signaling that utilizes syntax. Understanding how syntax functions in different taxa can help illuminate the evolution and development of human language and the role it plays in social cognition. The Bachman’s sparrow (Peucaea aestivalis) is a species of songbird that utilizes syntax in the form of preferred transitions …

Co-Designing Translanguaging-Informed Transformative Socioemotional Learning With Bilingual Kindergarten Teachers In Colombia, Catherine Restrepo-Widney

Electronic Theses and Dissertations

Emergent bilingual children enter early childhood classrooms with rich, dynamic linguistic repertoires that span languages, cultural practices, and ways of knowing. Socioemotional learning (SEL) often fails to meaningfully incorporate children’s linguistic and cultural repertoires, reflecting critiques that many SEL frameworks privilege individualistic, culturally narrow competencies that may marginalize learners from diverse backgrounds. This is particularly consequential in early childhood dual language bilingual education (DLBE), where children's heritage languages are central to authentic emotional connection and identity development, and where empirical models for culturally sustaining SEL remain limited. Through a participatory design research approach structured around iterative cycles of collaborative inquiry, …

Resource Constraint Evacuation Route Planning A Capacity-Aware Charge-Encoded State-Space Approach, Praveen Borra

Electronic Theses and Dissertations

Emergency Management Information Systems (EMIS) are defined as a set of tools that assist decision-makers in risk assessment and disaster response for significant multi-hazard threats and disasters. Over the past several decades, EMIS have become increasingly important for understanding, managing, and governing transportation systems during large-scale emergency events. One of the primary objectives of EMIS is to efficiently utilize spatial and network datasets to support evacuation planning, identify critical transportation patterns during emergencies, and allocate resources effectively. However, the increasing complexity and scale of modern transportation systems present significant challenges in developing reliable evacuation planning solutions.

One of the most …

Firms In The Flood: Is Fema Failing Small Businesses?, Lauryn Charles

Electronic Theses and Dissertations

When faced with a natural disaster, small businesses remain largely outside the direct reach of federal assistance. The Federal Emergency Management Agency (FEMA) estimates that up to 65% of small businesses close within two years of direct impact by a hazard event. Despite this vulnerability, existing research has focused primarily on infrastructure and household recovery, leaving the small business sector underexamined. This study is the first to link county-level IRS income data, FEMA mitigation grants, and SBA disaster records to empirically evaluate whether federal pre-disaster mitigation spending and community social resilience moderate the relationship between disasters and small business recovery …