Digital Commons Network^™

Characterizing The Germination Process And Establishing Best Practices For Seed Propagation Of Tamaulipan Thornscrub Species For Habitat Restoration, Saroj Dhakal

Theses and Dissertations

Tamaulipan thornscrub is an imperiled plant community of southern Texas and northeastern Mexico. Given its importance for biodiversity conservation, stakeholders have been involved in restoration programs using seedlings grown from wild seeds. However, stakeholders often report that insufficient seedling supply is a challenge. To address knowledge gaps in seed germination behavior limiting seedling production, this study was conducted on 18 Tamaulipan thornscrub species, identified by growers as difficult to germinate. Seeds of all studied species are orthodox except Amyris texana, which have recalcitrant properties. Nine species have physical dormancy that was successfully addressed with mechanical and/or chemical scarification. Other species …

Determination Of An Effective Natural Boxelder Bug (Boisea Trivittata) Repellent, Reyna Chavez

Theses and Dissertations

This study investigates the use of ecofriendly repellant alternatives to pest management to control boxelder bugs (Boisea trivittata). This bug gathers by the thousands on warm surfaces of exterior suburban homes during early fall and late spring. I determined bug repellency to turmeric oil (Curcuma longa), catnip (Nepeta cataria), citronella (Cymbopogon nardus), and lavender (Lavandula angustifolia). The treatments consisted of essential oils containing 20% methanol. All treatments demonstrated repellency of Boxelder bugs. Citronella was the most effective and had the highest level of repellency range of 90-99%. Catnip was the least effective with a repellency range of 63-82%.

Seagrass Preference Among Pinfish In The Lower Laguna Madre, Nathaniel Garza

Theses and Dissertations

Pinfish (Lagodon rhomboides) is a common estuarine fish species found from Massachusetts to the Yucatan, Mexico. As juveniles, pinfish spend a significant portion of their life in coastal seagrasses which provide both shelter from predators and food. Along the Texas coast, there are three major species of seagrass- turtle grass (Thalassia testudinum), manatee grass (Syringodium filiforme) and shoal grass (Halodule wrightii) that differ in structural complexity. The goal of this study was to determine if pinfish associate more with one seagrass species than the others. A year-long field study was completed using twelve sample sites in the Lower Laguna Madre, …

Bacillus Subtilis: A Bacterium That Can Potentially Degrade Low-Density Polyethylene (Ldpe) And Polyethylene Terephthalate (Pet), Migdalia Flores

Theses and Dissertations

The widespread application and disposal of plastics, such as low-density polyethylene (LDPE) and polyethylene terephthalate (PET), have raised significant environmental health concerns. Because of each plastic’s stability and durability, these plastics exhibit limited natural degradation in the environment. Recently, the environmentally friendly biodegradation of plastics by living microorganisms has attracted more attention, as they can assist in the natural degradation process. In this study, the bacterial strain Bacillus subtilis ATCC6051 was used to degrade LDPE and PET for 60 days. To measure the degradation of low-density (LDPE) and polyethylene terephthalate (PET), the dry weight was taken, and physical characteristics were …

Population Structure Of Red Drum (Sciaenops Ocellatus (Linnaeus, 1766)) In Two Systems In The Northwestern Gulf Of Mexico, Sandra Antonia Leal

Theses and Dissertations

Red drum (Sciaenops ocellatus) are an economically significant species of fish inhabiting the Gulf of Mexico. There are limited studies assessing S. ocellatus population structure focused on the southern coast of Texas. A total of 1,008 fish were collected over one year on a quarterly basis at South Bay (SB) and Holly Beach (HB) in the Lower Laguna Madre (LLM) of Texas to assess population structure. Juvenile S. ocellatus utilize the water systems of the LLM as a nursery ground and were more abundant at SB (n = 718) than HB (n = 290). The most abundant age classes were …

Applicability Of Cementochronology To Estimate Season-Of-Death In Humans: Insights From Modern Documented Collections, Olga Ibarra-Sanchez

Theses and Dissertations

Dental cementum is characterized by lifelong deposition of alternating opaque annuli in fall/winter and translucent bands in spring/summer. This study aims to test the applicability of cementochronology to estimate season-of-death, by observing the properties of the last layer, with direct implications for forensic anthropology and bioarchaeology. The sample includes canine teeth from 146 adults (84 males, 62 females), age-at-death ranging from 20-97 years (mean=61.7 years, SD=18.6 years), from two contemporary skeletal collections. Of these individuals, 78 (53.4%) died in spring/summer and 68 (46.6%) died in fall/winter. Overall accuracy was low at 64.4% (94/146). Accuracy was higher for spring/summer deaths 100.0% …

An Evaluation Of Noncontingent Reinforcement And Additional Treatment Components In The Treatment Of Stereotypic Behavior, Stephanie Nicole Brand

Theses and Dissertations

Individuals with autism often engage in stereotypic behavior that competes with learning and social skills. Behavior analytic treatment may be implemented to reduce stereotypy. Noncontingent reinforcement (NCR) is one treatment that is often effective to reduce stereotypy. However, literature suggests that the use of NCR is contraindicated in some circumstances, as it may compete with the acquisition of new skills or may increase subsequent persistence of stereotypy. This research was designed to expand our knowledge of potential limitations of NCR when combined with other treatments. Study one examined persistence of stereotypy following treatment with NCR with and without response blocking. …

Benthic Infaunal Responses To Shoreline Restoration, Jessica Lauren Cline

Theses and Dissertations

In the age of increasing urban coastal sprawl, natural shorelines are being replaced by hard armoring structures, which result in the loss of valuable ecosystem services. Hybrid living shorelines, areas that include limited and less intensive armoring strategies paired with the integration of plants and other natural materials, present an opportunity to marry the need for more aggressive stabilization with the continued preservation of ecosystem functions and biological communities. This project uses benthic infauna to evaluate the success of a living shoreline installation in Palm Bay, Florida. The deployment features experimental treatments of breakwaters and red mangroves to explore how …

Comparative Assessment Of Lower Limb Neuromusculoskeletal Activation And Joint Kinematics In Normal And Impaired Gait, Jack Ryan Schule

Theses and Dissertations

This thesis evaluates whether accessible and affordable technologies can provide clinically significant, quantifiable gait analysis comparable to traditional marker-based motion capture systems. Modern high-end systems offer excellent accuracy but remain financially and logistically inaccessible to many clinicians and researchers. To address this gap, a framework was developed using markerless pose estimation using the model, MediaPipe, inertial measurement units (IMUs) processed through an Extended Kalman Filter (EKF), and surface electromyography (sEMG) to measure joint kinematics and neuromuscular activity during gait. An experiment was performed where data was collected from participants with both normal gait and pathologies including: Osgood–Schlatter disease, Plica Band …

Conflict Management: Values-Based Training Effects On Shifts In Strategy Preference Among Formerly Incarcerated Individuals, Candace Renae Fay

Theses and Dissertations

Problem-solving refers to a behavior evoked by a problem in which the behaver manipulates, supplements, and consequently, generates discriminative stimuli (SD) that they subsequently respond to (Donahoe & Palmer, 2004; Skinner, 1957, 1968). The use of problem-solving when faced with interpersonal conflict reflects pro-social behavior patterns, while providing a learning opportunity for identifying relevant variables and contingencies, and possible reductions of extended conflict or escalation in anti-social behavior patterns. Patterns of preference can be identified following multiple opportunities, given an array of options, resulting in consistency of choice responses (Martin, 2006). When less prosocial (avoiding, yielding), or antisocial (forcing) conflict …

The Role Of C-X-C Chemokine Receptor Type 5 (Cxcr5) On Sex-Dependent Neurobehavioral Changes In The Sub Clinically Sensitized Individuals With Repeated Allergen Exposure, Dilini Vimarshani Ekanayake Ekanayake Mudiyanselage

Theses and Dissertations

Food allergen consumption has been suspected to influence mood and behavior in individuals who are sensitized but tolerant to the food. Using a mouse model of subclinical cow’s milk allergy (CMA), we previously showed that C57BL/6J mice sensitized to β-lactoglobulin (BLG, Bos d 5) exhibited elevated BLG-specific IgE levels even without observable allergic reactions, suggest developing immune responses towards the allergen. We also observed elevated cytokine and chemokine levels, astrogliosis and cortical demyelination along with behavioral changes such as anxiety-like and depression-like behavior after consuming a whey-containing diet for two weeks. Furthermore, we demonstrated the possible immune cell infiltration and …

Design And Implementation Of Home Energy Management System (Hems) In Smart Grid Through Demand Side Management (Dsm), Nirmala Jegadeesan Ms

Theses and Dissertations

The rising global energy demand, combined with environmental concerns and the depletion of conventional energy sources, has driven the need for the development of smarter and more sustainable energy systems. This research focuses on Home Energy Management System (HEMS) using soft computing techniques to optimize load scheduling, enhance energy efficiency, and integrate Renewable Energy Sources (RES) such as solar and battery storage. The primary goal is to balance supply and demand, reduce peak loads, and minimize energy costs while ensuring consumer comfort and system reliability.

Smart grids provide enhanced capabilities compared to conventional grids by enabling bidirectional flows of energy …

Using An Old Assay In New Ways: Differential Scanning Calorimetry Characterization, Quantification, And Interaction Analysis Of Whey Proteins, Charity Conlin Jennings

Theses and Dissertations

Whey proteins including β-Lactoglobulin, α-Lactalbumin, Immunoglobulin-G, Serum Albumin, Lactoferrin, and Lactoperoxidase each have unique biological properties spanning anti-bacterial, anti-fungal, and anti-viral activities as well as deliver essential nutrients to the human body. In the past decade, there has been a large focus on extracting these individual proteins for their use in foods and supplements. In order to best extract these proteins and prepare them properly in foods and supplements, an understanding of how they behave and denature in different environments is necessary. However, there is insufficient knowledge of their thermodynamic properties and potential interactions in varying conditions. Additionally, there are …

Development Of Natural Product Analogs As Therapeutic Agents, Jacob Mara

Theses and Dissertations

Cancer stem cells (CSC) are cancer cells in a tumor mass that may self-renew and develop into various cell types, resulting in a heterogeneous tumor. CSCs have been shown to have a role in many facets of cancer formation, including tumor genesis, proliferation, and metastatic activity. They are also implicated in chemotherapeutic treatment resistance and the recurrence of some malignancies. Based on these capacities, CSCs have been identified as the next target for cancer therapy and control. Salinomycin's potential for therapeutic use based on ongoing research, as well as the synthesis of its derivatives and their biological activity, will also …

Decidiendo Lo Mejor Para Su Educación: Immigrant Latine Madres At The Intersection Of Confianza, Ideology, And The Illusion Of Choice, Emmeline Ortiz

Theses and Dissertations

This qualitative multiple case study examined the decision-making processes of immigrant Latine caregivers selecting schools and language programs for their children classified as Multilingual Learners (MLLs) in New York City. Although policy frameworks position caregivers as central decision-makers, bilingual program access remains limited, especially in charter schools, and families must navigate language ideologies that privilege English as the safest educational pathway. Ten immigrant Latine participants, nine mothers and one grandmother, whose children attended traditional or charter elementary schools in one NYC district, shared their experiences through semi-structured interviews conducted in Spanish. Data were analyzed through iterative coding and thematic analysis …

The Moderating Effects Of Community Involvement On The Association Between Witnessed Community Violence And Mental Health Outcomes Among Black Adolescents, Curtisha Tamara Shacklewood

Theses and Dissertations

Black youth and adolescents are at a disproportionately high risk for experiencing community violence exposure (CVE) and the potential influence it may have on psychological functioning. Research posits that Black youth who experience community violence are at a significantly higher risk of experiencing elevated internalizing symptoms (e.g., depression) and externalizing symptoms (e.g., delinquency). Previous research has utilized the ecological model to investigate interpersonal protective factors that potentially buffer the effects of CVE, including parental support and family characteristics. However, there is little research that explores community-level factors, such as community activities (e.g., youth activities and parental perception of collective efficacy) …

Developing A Dynamic Bilingual Space In An Early Childhood Korean Heritage Language Classroom Through Multimodal Translanguaging Pedagogy, Kyungjin Hwang

Theses and Dissertations

Drawing on translanguaging theory and multimodal literacy, this dissertation examines how a multimodal translanguaging pedagogy can create a dynamic bilingual space in a Korean heritage language classroom in the southeastern United States. Using a teacher-research design and thematic analysis of classroom video recordings and student artifacts, the study explored ten instructional modules with Korean-American children aged five to six. It first identified the core components of the pedagogy, its framework, curriculum content, and teacher strategies, and then analyzed how children flexibly used Korean and English across modes such as speaking, writing, and drawing. Findings revealed diverse translanguaging forms and functions. …

Parent Perspectives On Contemporary Adolescent Concerns, Allyson Worthy

Theses and Dissertations

Adolescence is a critical developmental period that marks the transition between childhood and adulthood. Psychopathology is known to emerge during this time, in which many internalizing and externalizing disorders have their onset. The assessment of adolescent psychopathology involves use of questionnaire measures to obtain perspectives from the adolescent themselves, their parents, and their teachers. Parents have been found to be especially important informants of adolescent functioning. With new challenges that arise for present-day adolescents (e.g., social media use), parents can provide insight into the different areas that need to be evaluated when assessing domains of contemporary adolescents’ development and psychopathology. …

Multilateral Organizations And Health Emergency Management During Crisis: The Case Study Of The World Health Organization During Covid-19 Pandemic, Aya Helmy Hamada

Theses and Dissertations

Multilateral organizations, such as the World Health Organization (WHO), play a key role in managing health emergencies during crises. During the COVID-19 pandemic, WHO achieved significant progress by supporting countries with technical assistance, guidelines, and essential resources. As well as providing technical guidance, sharing information, and coordinating among member states. This experience highlighted the importance of WHO in tackling global public health problems and showed how multilateral collaboration can help address complex challenges. Moreover, risk and crisis communication proved to be a critical part of WHO’s response, ensuring that clear and timely information reached the public and stakeholders. Despite these …

The Role Of Prelimbic Projections To The Rostromedial Tegmnetal Nucleus In Cue Discrimination, Emma Lane Carlson

Theses and Dissertations

Maladaptive decision-making, such as persistent reward seeking despite negative consequences, is a hallmark of substance use disorder (SUD) and related psychiatric conditions. These behaviors are thought to arise from impairments in aversive learning and disrupted neural signaling that normally supports behavioral inhibition. The prelimbic cortex (PL) plays a critical role in encoding cue–outcome associations and exerting top-down control over behavior, while the rostromedial tegmental nucleus (RMTg) serves as a GABAergic inhibitor of midbrain dopamine neurons in response to aversive stimuli. Although both structures have been implicated in reward and avoidance processes, little is known about how direct PL-RMTg projections contribute …

Anthropomorphism In Language And Thought: The Effect Of Agentive Linguistic Framing On Readers’ Perceptions Of Ai Animacy, Dawson Petersen

Theses and Dissertations

Over the past decade, deep learning AI systems have gone from academic obscurity to near cultural centrality in the developed world. As these technologies become increasingly integrated into daily life, there is growing cause for concern about AI anthropomorphism—i.e., the perception of AIs as more human than they really are. Despite the potential risks, AI developers continue to market their technologies using agentive language that seems to be designed to encourage anthropomorphism. The current dissertation utilizes behavioral and eye-tracking methods to examine the relationship between agentive linguistic framing and AI anthropomorphism in both controlled judgments and automatic inferences. The results …

Behind The Gens: A Bioarchaeological Study Of Kinship Structure And Social Change In Iron Age Latium, Italy, Andrea Noemí Acosta Caballero

Theses and Dissertations

The cemetery of Osteria dell’Osa is the only completely published Iron Age cemetery from Latium. Its research legacy continues as dietary, mobility, and biological affinity patterns were reconstructed through carbon, nitrogen, oxygen, and strontium isotope analyses and biodistance analysis using bone and dental samples for this dissertation project. The main hypotheses tested are:

a) The diet of people buried at Osteria dell’Osa during the Iron Age likely consisted of mostly grains like wheat and barley, which may yield low carbon isotope signatures;

b) The protein consumption of the diet of people at Osteria dell’Osa was mainly composed of terrestrial protein …

Development Of A Strategy To Neutralize Ccl8 Activity And Ablate Ccl8 Cellular Targets, Bernardo Chavez

Theses and Dissertations

The chemokine CCL8 (monocyte chemoattractant protein-2) is a versatile signaling molecule involved in tumor progression, immune cell recruitment, and therapeutic resistance. Through activation of receptors including CCR1, CCR2B, and CCR5, CCL8 promotes leukocyte trafficking, epithelial–mesenchymal transition, and the establishment of immunosuppressive tumor microenvironments. In breast cancer and inflammatory diseases, elevated CCL8 levels correlate with poor clinical outcomes, making it a promising therapeutic target.

A strategy was developed to block CCL8 activity and selectively ablate CCL8 receptor expressing cells. A neutralizing monoclonal antibody, 1G3E5, was identified from a panel of murine candidates based on high affinity CCL8 binding. Sequencing revealed two …

Multi-Layer Decision Making For Long-Term Autonomous Mission Based On Dual Process Theory, Shruti Jadhav

Theses and Dissertations

Unmanned aerial vehicles (UAVs) are increasingly used in precision agriculture, where extended autonomous operation is required for monitoring, intervention, and field management. However, achieving long-term autonomy remains challenging due to battery constraints, environmental uncertainty, and the need to balance exploration with event-driven tasks. To address these challenges, a multi-layer decision-making framework inspired by Dual Process Theory (DPT) is developed. The framework combines reactive return-tobase strategies, exploratory navigation, and directional bias from prior missions, with a conflict-monitoring mechanism that adapts system behavior based on real-time conditions. The approach is implemented in a simulated agricultural grid environment, demonstrating improved adaptability and coverage …

A Qualitative Study Of Middle School Teachers’ Experiences Integrating Computer Coding Into Mathematics Classrooms, George William Austin Iii

Theses and Dissertations

As computers become more accessible in schools nationwide, teachers are embracing them to impact achievement positively (Brudno, 2013; Cetin, 2016). As a result, computer coding instruction has gained attention as a strategy for providing students with skills that will serve them both pre and post-graduation (Burke & Kafai, 2013; Yadav et al., 2016; Ng, 2017). Computer coding is the process of providing instructions for a computer to follow. In 2017, the South Carolina State Board of Education approved Computer Science and Digital Literacy standards for all K-8 public schools in the state of South Carolina (South Carolina Department of Education, …

Multiscale Geometric Analysis In Endovascular Therapies: Ex Vivo, In Silico Approaches, Dima Hussein Ali Bani Hani

Theses and Dissertations

In this work, we address a persistent global challenge of vascular disease, specifically peripheral artery disease (PAD), and arteriovenous fistula (AVF) complications in patients with end-stage kidney disease (ESKD). The important role of vascular geometry in disease intervention plans and the development of endovascular therapeutic strategies (e.g., Drug-coated balloon (DCBs)) is critical in addressing these challenges.

This study evaluates the feasibility of co-delivery of paclitaxel (PTX) and valsartan (VAL) using urea-based coatings in DCB, analyzes the coating morphology and microstructural changes to improve therapeutic results. A computational finite element model was developed to complement experimental work, simulate tissue-coating interactions, compute …

Gut Microbiome Dynamics In Heart Failure And The Therapeutic Potential Of Nmeg-Cgrp, Kamryn Michael Gleason

Theses and Dissertations

Heart failure (HF) is increasingly recognized as a multisystem disease often linked to gut dysbiosis; however, its specific effects on gut microbial composition remain poorly understood. This study examined long-term changes in the gut microbiome in a murine HF model induced by transverse aortic constriction (TAC) and evaluated the effects of NMEG-CGRP. TAC mimics pressure overload-induced cardiac dysfunction, replicating key features of HF. CGRP, a neuropeptide with vasodilatory and cardioprotective effects, shows potential as a therapy for HF but is limited by rapid degradation. A stabilized analog, NMEG-CGRP, was used to assess its impact on cardiac and gastrointestinal health. Mice …

The Role Of Fibroblast Activation Protein On Left Ventricular Growth And Extracellular Matrix Remodeling As A Function Of Age And Pressure Overload, Amelia Marie Churillo

Theses and Dissertations

Fibroblast activation protein (FAP) is abundantly expressed in cancer associated fibroblasts and contributes to extracellular matrix (ECM) remodeling. Recent studies using imaging techniques have identified increased levels of FAP in the left ventricle (LV) of patients identified as at risk for developing heart failure. However, the role of FAP in regulated LV myocardial structure and function remains unclear. This project tested two hypotheses: First, genetic ablation of FAP would modify LV structure and function and be more pronounced with aging. Second, genetic ablation of FAP would modify LV structure and function with LV pressure overload (LVPO) accompanied by ECM remodeling.

Fue Evocations: A Culturally-Informed Performance Guide To Approaching Works For The Western Concert Flute Inspired By Traditional Japanese Flutes, Chase Michael Ketron

Theses and Dissertations

The purpose of this document is to create a culturally-informed and aesthetically accurate performance preparation guide for Western concert flute players seeking to perform works inspired by traditional Japanese flutes, or fue, such as the shakuhachi and nohkan.¹ While many pieces like these exist, there are limited resources detailing how to emulate the traditional Japanese flutes and their performance practices. The composers of these works often do well to provide notation for producing the specific sounds or effects they are trying to replicate, but these are non-standardized and thus vary from composer to composer. In addition, the traditional …

Adapting To Inflationary Pressures: Household Coping Strategies In Urban Egypt (2016– 2025), Mohamed Mohamed Ashraf Kamal

Theses and Dissertations

Over the past decade, Egypt has faced persistent economic challenges including repeated currency devaluations, high inflation rates, subsidy reforms such as the gradual reduction of food and energy subsidies, and the ripple effects of global crises that have significantly impacted household well-being, especially in urban areas. These pressures have eroded purchasing power and heightened food insecurity, especially among low- and middle-income families. Although substantial attention has been paid to macroeconomic indicators, there remains a critical gap in understanding how households adapt on a daily basis to manage financial stress and sustain their livelihoods. This inquiry is especially timely, as household …