Digital Commons Network^™

Processing Of Niti Sma For High Reflectivity Applications, Nicholas Dean Asbury

UNF Graduate Theses and Dissertations

Nickel Titanium (NiTi) is a shape memory alloy (SMA) that is capable of being deformed and subsequently returned to the original shape through heating. This unique property makes NiTi a prime material for potential applications in the aerospace industry. As manufacturing capabilities advance, the ability to produce and implement advanced materials, such as shape memory alloys like NiTi, becomes more feasible. One such application being studied is deployable mirrors for imaging satellites. Reflector and mirror surfaces for imaging in the visible and infra-red range of the light spectrum require low surface roughness across the largest allowable area for the collection …

Can A Phycosphere Associated Bacterium Be Used As A Biological Control For Floating Algal Mats?, Aubrey C. Patterson Holsworth

UNF Graduate Theses and Dissertations

Abstract

Freshwater harmful algal blooms (HABs) are a global water quality issue. Algae, especially cyanobacteria, are integrally associated with complex microbial assemblages, which cycle nutrients, provide microenvironments, breakdown potentially harmful molecules, etc. However, these same microbial consortia are competitors or even inhibitors to algae in these systems. One potential biological control is Rhodospirillum rubrum, a Gram- proteobacterium. To evaluate its capacity for HAB mitigation, experimental mesocosms were inoculated with a native assortment of algae and R. rubrum and grown for 2-months. Relative Fluorescence Units (RFU), Ash Free Dry Mass, and eukaryotic (23S rDNA) metabarcoding were conducted to estimate algal …

The Impact Of Online Course Enrollment Of First-Year Student Engagement And Campus Life, Ruth Y. Lopez

UNF Graduate Theses and Dissertations

The purpose of this quantitative study is to examine the impact online classes have on first-year student engagement and campus life at the University of North Florida. By using Alexander Astin’s theory of student involvement, this study examines the pattern of student engagement over time for first-year students enrolled in four quartiles of online classes. The study will focus on the level of engagement around (1) the utilization of five selected on-campus facilities and (2) student participation in six selected on-campus signature events and activities. The study also explores the meaningful ways these four student groups enrolled in online classes …

Spatial Equity In Accessing Critical Facilities During Hurricanes, Pooya Komeilian

UNF Graduate Theses and Dissertations

Florida encounters multiple natural disasters every year, making evacuation a critical mitigation plan when severe impacts are predicted. Evacuation is a complex procedure that involves everything from household decision-making to large-scale traffic network analysis. It also addresses logistical issues, such as transporting impacted people to shelters or medical centers. Access to shelters, gas stations, and lodgings is of utmost importance, as numerous studies and surveys have shown that some people prefer not to evacuate, even if they perceive the disaster risk to be very high.

Based on this, the present study follows two phases to address gaps in evacuation studies. …

Integrating Therapy Into Play: Stand-On Ride-On For A Child With Cerebral Palsy, Kira Flanagan

UNF Graduate Theses and Dissertations

This study focuses on the development of an adaptive ride-on toy specifically designed for a 2.5-year-old child with spastic diplegic cerebral palsy. As a feasibility study, the primary objective of this innovative device is to enhance motor function, foster autonomy, and improve the overall quality of life for the child. The Power Mobility Device (PMD) integrates actuation and steering modifications, and a harness mechanism tailored to meet the child's unique needs. Comprehensive assessments of the child's spatiotemporal gait characteristics were conducted before and after a three-month usage period. The results reveal significant improvements in the child's ability to control dynamic …

Factors Influencing Household Travel Behavior And Trip Distances In Florida: A Rural Vs. Urban Perspective, Kadeem Lafargue

UNF Graduate Theses and Dissertations

This thesis investigates disparities in travel behaviors between rural and urban populations in the United States, with a specific focus on Florida. Leveraging data from the 2017 National Household Travel Survey (NHTS), the study examines demographic factors such as age, income, and household size, and their influence on travel patterns. By employing statistical methods including Poisson and negative binomial regression models, the research explores two key variables: the frequency of trips made per day and the average trip distance in miles. These models are particularly effective in handling overdispersion in count data, ensuring a robust analysis of travel behaviors across …

Food Insecurity And Eating Disorders In College Students: Two Scoping Reviews, Barbara Jan Goldman

UNF Graduate Theses and Dissertations

Objective: These scoping reviews explore the broad body of research post-secondary students experiencing food insecurity and eating disorders, to identify trends and gaps to inform future research.

Methods: Three search engines (PubMed, Web of Science, and CINHAL Full Text) were systematically searched for articles reporting on food security status in U.S. college students for manuscript one and post-secondary students experiencing food insecurity and maladaptive eating behaviors or eating disorders for manuscript two.

Results: One-hundred and sixty studies met inclusion criteria for manuscript one. Emerging high-risk student characteristics include gender non-conforming (GNC) and non-binary, financial independence in college, and pregnant and …

Linear Topological Space, Vi Nguyen

UNF Graduate Theses and Dissertations

This thesis begins with an introduction to linear and topological spaces and then defines linear topological spaces. It studies key properties such as neighborhoods, convexity, reflexivity, and weak and weak* topologies. Finally, it concludes with solving non-linear partial differential equations.

Evaluating The Use Of Baited Remote Underwater Video (Bruv) In Assessing Shark And Fish Populations In A Low Visibility Estuarine System, The Tolomato River, Fl, Usa, Sarah Worthington

UNF Graduate Theses and Dissertations

Recently, there has been increasing use of baited remote underwater video (BRUV) surveys for assessing shark and fish populations in marine ecosystems. This approach can be useful because it may provide a non-destructive, non-extractive, and cost-effective alternative to traditional fishing-based methods. However, to date, most studies using BRUVs have focused on their use in high-visibility ecosystems, such as tropical reefs. Furthermore, few studies have compared results from BRUV surveys with those obtained using traditional methods to evaluate the efficacy of this approach. Therefore, the goal of this study was to evaluate the effectiveness of using BRUV surveys to assess shark …

Analysis Of Shoreline Erosion At Cumberland Island Using Advanced Circulation (Adcirc) Modeling, Christopher Harrigan

UNF Graduate Theses and Dissertations

This study investigates shoreline erosion at Brickhill Bluff along the Brickhill River in Cumberland Island National Seashore using ADCIRC. Two scenarios were modeled during this research: bed stresses during regular tidal cycles and bed stresses during worst-case storm (i.e., hurricane) conditions. Velocities from these models were used to compute bed shear stresses and these stresses were compared to site’s sediment critical shear stress. Results appear to show that a meander in the Brickhill River causes relatively high (i.e., on the order of 0.27 ��/��² ) shear stresses during regular tidal cycles and even higher (i.e., on the order of …

Development And Characterization Of Ceramic Devices For Capillary Action In Microgravity For The Purpose Of Growing Vegetables In Space, Lucas S. Mougeot

UNF Graduate Theses and Dissertations

The future of humanity is often rendered in spectacular visions of a multiplanetary civilization with a booming space economy. Reaching this reality requires addressing one of the core needs of survival: food. Porous ceramics used for Passive Porous Tube Nutrient Delivery Systems (PPTNDS) offer a promising solution. In microgravity environments such as the International Space Station (ISS), fluid dynamics and liquid coagulation do not support conventional agricultural practices. Porous ceramic materials present a solution that enables nutrient solution diffusion via capillary action.

In this research, it was determined that extruding a wadding ceramic tube and sintering it at 1900 °F …

Findings Of Ptsd-Specific Deficits In Default Mode Network Strength Following A Mild Experimental Stressor, Christopher L Averill, Lynnette A Averill, Teddy J Akiki, Samar Fouda, John H Krystal, Chadi G Abdallah

Staff and Researcher Publications

Reductions in default mode (DMN) connectivity strength have been reported in posttraumatic stress disorder (PTSD). However, the specificity of DMN connectivity deficits in PTSD compared to major depressive disorder (MDD), and the sensitivity of these alterations to acute stressors are not yet known. 52 participants with a primary diagnosis of PTSD (n = 28) or MDD (n = 24) completed resting-state functional magnetic resonance imaging immediately before and after a mild affective stressor. A 2 × 2 design was conducted to determine the effects of group, stress, and group*stress on DMN connectivity strength. Exploratory analyses were completed to …

A 30-Year Time Series Analysis Of The Impact Of Climate Change On Corn Yield In Iowa Using The Autoregressive Distributed Lag Model – 1992 To 2022, Tesleem Ajisafe

Dissertations and Theses @ UNI

Climate change poses significant socio-economic challenges globally, notably altering weather patterns and increasing the frequency and severity of extreme weather events (Seneviratne et al. 2021). This study investigates the impact of climate change on corn yield in Iowa from 1992 to 2022, using the autoregressive distributed lag (ARDL) model to analyze time series data on temperature, precipitation, and corn yield at the county level. Iowa, the leading corn producer in the US (Xu, Twine, & Girvetz 2016), has experienced an 8% increase in precipitation from 1873 to 2008, with notable effects in the eastern region (“Climate Change,” n.d.). A detrending …

Racial Competence Among Human Resources Leaders: A Quantcrit Analysis, Steven D. Parker

Dissertations and Theses @ UNI

No abstract provided.

Assessment Of Heavy Metals (Cr, Cu, Pb, And Zn) Bioaccumulation And Translocation By Erigeron Canadensis L. In Polluted Soil, Volodymyr Laptiev, Michelle Giltrap, Furong Tian, Nataliia Ryzhenko

Research Outputs: 2025-Present

This work aims to assess the bioavailability and bioaccumulation of Cr, Cu, Pb, and Zn in the soil–plant system (Erigeron canadensis L.) in the zone of anthropogenic impact in Dnipro city, a significant industrial and economic centre of Ukraine. Sampling was carried out at three locations at distances of 1.0 km, 5.5 km, and 12.02 km from the main emission sources associated with battery production and processing plants in Dnipro. The concentrations of heavy metals such as Cr, Cu, Pb, and Zn were analysed using atomic emission spectrometry from soil and parts of Erigeron canadensis L. The highest concentrations of …

Advanced Optical Photothermal Infrared Spectroscopy For Comprehensive Characterization Of Microplastics From Intravenous Fluid Delivery Systems., A Tarafdar, J Xie, A Gowen, O'Higgins Ac, Xu Jl

Research Outputs: 2025-Present

No abstract provided.

Managing Human-Ai Collaborations Within Industry 5.0 Scenarios Via Knowledge Graphs: Key Challenges And Lessons Learned, Franz Krause, Heiko Paulheim, Elmar Kiesling, Kabul Kurniawan, Maria Chiara Leva, Hector Diego Estrada-Lugo, Gernot Stübl, Nazim Kemal Üre, Javier Dominguez-Ledo, Maqbool Khan, Pedro Demolder, Hans Gaux, Bernhard Heinzl, Thomas Hoch, Jorge Martinez-Gil, Agastya Silvina, Bernhard A. Moser

Research Outputs: 2025-Present

In this paper, we discuss technologies and approaches based on Knowledge Graphs (KGs) that enable the management of inline human interventions in AI-assisted manufacturing processes in Industry 5.0 under potentially changing conditions in order to maintain or improve the overall system performance. Whereas KG-based systems are commonly based on a static view with their structure fixed at design time, we argue that the dynamic challenge of inline Human-AI (H-AI) collaboration in industrial settings calls for a late shaping design principle. In contrast to early shaping, which determines the system's behavior at design time in a fine granular manner, late shaping …

A Roadmap For Improving Data Quality Through Standards For Collaborative Intelligence In Human-Robot Applications, Shakra Mehak, Inês F. Ramos, Keerthi Sagar, Aswin Ramasubramanian, John D. Kelleher, Michael Guilfoyle, Gabriele Gianini, Ernesto Damiani, Maria Chiara Leva

Research Outputs: 2025-Present

Collaborative intelligence (CI) involves human-machine interactions and is deemed safety-critical because their reliable interactions are crucial in preventing severe injuries and environmental damage. As these applications become increasingly data-driven, the reliability of CI applications depends on the quality of data, shaping the system’s ability to interpret and respond in diverse and often unpredictable environments. In this regard, it is important to adhere to data quality standards and guidelines, thus facilitating the advancement of these collaborative systems in industry. This study presents the challenges of data quality in CI applications within industrial environments, with two use cases that focus on the …

Bridging Biomedical Research With Aerospace Engineering In The Lab Of Tomorrow, Christine Walck

Publications

“My goal with this lab is to take biomedical research and tie it into a school that is grounded in aerospace and aeronautical engineering,” says Assistant Professor of Mechanical Engineering at Embry-Riddle Aeronautical University’s Daytona Beach Campus, Christine Walck. “How do I make that connection? That’s the question I’ve been working on for the past couple of years with Vicon.”

Advancements In Ai-Driven Education: Transforming Learning And Training With Intelligent Technologies, Sharon L. Burton

Publications

This article examines the transformative role of Artificial Intelligence (AI) in higher education, focusing on its integration in learning methodologies and its impact on student engagement and outcomes. Recent research underscores the increasing use of AI in education, where it is reshaping teaching and learning dynamics by facilitating personalized and effective learning experiences. Applying Literature review, the study further explores AI's role in enhancing independent learning abilities and student satisfaction, with intelligent learning tools proving crucial in improving user contentment and intent to use. Additionally, it considers the ethical and risk management aspects of AI in education, including data governance …

Fundamentals Of Sustainability, Eva Maleviti

Publications

Fundamentals of Sustainable Aviation is the frst textbook to survey the critical feld of sustainability within the aviation industry. Taking a systems thinking approach, it presents the foundational principles of sustainability and methodically applies them to diferent aviation sectors. Opening with the basics of sustainability, emphasising the Sustainable Development Goals, the book then considers the environmental, economic and social dimensions of aviation. The following chapters apply these insights to aviation design, supply chains, operations, maintenance and facilities. The fnal chapter examines the concept of resilience in sustainable aviation. Overall, the textbook shows how future sustainability can be achieved by making …

The Why, When, Where, How, And So What Of So-Called Rapidly Acting Antidepressants, Alan F Schatzberg, Sanjay J Mathew

Staff and Researcher Publications

Developing antidepressants that are not only more effective but are rapidly acting is the Holy Grail for psychiatry. We review multiple issues that arise in determining rapid responses in antidepressant trials. The current status of purportedly rapid acting agents is first reviewed. Then, a number of key questions/issues are addressed: Is there a unifying definition for rapid response across studies? Should rapid response criteria be based on required measurable effects on overall improvement? On specific symptoms such as psychomotor retardation, depressed mood, or anhedonia? In associated symptoms such as anxiety or insomnia? When should onset be considered rapid-by Day 3? …

The Seroprevalence Of Sars-Cov-2-Specific Antibodies In Australian Children: A Cross-Sectional Study, Archana Koirala, Jocelynne Mcrae, Philip N Britton, Marnie Downes, Shayal A Prasad, Suellen Nicholson, Noni E Winkler, Matthew V N O'Sullivan, Fatima Gondalwala, Cecile Castellano, Emma Carey, Alexandra Hendry, Nigel Crawford, Ushma Wadia, Peter Richmond, Helen S Marshall, Julia E Clark, Joshua R Francis, Jeremy Carr, Adam Bartlett, Brendan Mcmullan, Justin Skowno, Donald Hannah, Andrew Davidson, Britta S Von Ungern-Sternberg, Paul Lee-Archer, Laura L Burgoyne, Edith B Waugh, John B Carlin, Zin Naing, Nicole Kerly, Alissa Mcminn, Guillian Hunter, Christine Heath, Natascha D'Angelo, Carolyn Finucane, Laura A Francis, Sonia Dougherty, William Rawlinson, Theo Karapanagiotidis, Natalie Cain, Rianne Brizuela, Christopher C Blyth, Nicholas Wood, Kristine Macartney

Staff and Researcher Publications

Background: Following reduction of public health and social measures concurrent with SARS-CoV-2 Omicron emergence in late 2021 in Australia, COVID-19 case notification rates rose rapidly. As rates of direct viral testing and reporting dropped, true infection rates were most likely to be underestimated.

Objective: To better understand infection rates and immunity in this population, we aimed to estimate SARS-CoV-2 seroprevalence in Australians aged 0-19 years.

Methods: We conducted a national cross sectional serosurvey from June 1, 2022, to August 31, 2022, in children aged 0-19 years undergoing an anesthetic procedure at eight tertiary pediatric hospitals. Participant questionnaires were administered, and …

Towards Objective, Temporally Resolved Neurobehavioral Predictors Of Emotional State, Katherine E Kabotyanski, Han G Yi, Rahul Hingorani, Brian S Robinson, Hannah P Cowley, Matthew S Fifer, Brock A Wester, Bishal Lamichhane, Ashutosh Sabharwal, Anusha B Allawala, Sameer V Rajesh, Nabeel Diab, Raissa K Mathura, Victoria Pirtle, Joshua Adkinson, Andrew J Watrous, Eleonora Bartoli, Jiayang Xiao, Garrett P Banks, Sanjay J Mathew, Wayne K Goodman, Xaq Pitkow, Nader Pouratian, Benjamin Y Hayden, Nicole R Provenza, Sameer A Sheth

Staff and Researcher Publications

No abstract provided.

Efficacy And Safety Of Zuranolone Co-Initiated With An Antidepressant In Adults With Major Depressive Disorder: Results From The Phase 3 Coral Study, Sagar V Parikh, Scott T Aaronson, Sanjay J Mathew, Gustavo Alva, Charles Debattista, Stephen Kanes, Robert Lasser, Amy Bullock, Mona Kotecha, Jungah Jung, Fiona Forrestal, Jeff Jonas, Theresa Vera, Bridgette Leclair, James Doherty

Staff and Researcher Publications

Major depressive disorder (MDD) is a mental health disorder that can cause disability and functional impairment that standard-of-care (SOC) antidepressant therapies (ADTs) can take weeks to treat. Zuranolone is a neuroactive steroid and positive allosteric modulator of synaptic and extrasynaptic γ-aminobutyric acid (GABA) type A receptors approved as an oral, once-daily, 14-day treatment course in adults with postpartum depression and under investigation in adults with MDD. The phase 3 CORAL Study (NCT04476030) evaluated the efficacy and safety of zuranolone 50 mg co-initiated with SOC ADT (zuranolone+ADT) vs placebo co-initiated with SOC ADT (placebo+ADT) in adults with MDD. Patients were randomized …

Perspective: The Evolution Of Hormones And Person Perception-A Quantitative Genetic Framework, Christopher I Gurguis, Tyler S Kimm, Teresa A Pigott

Faculty, Staff and Student Publications

Evolutionary biology provides a unifying theory for testing hypotheses about the relationship between hormones and person perception. Person perception usually receives attention from the perspective of sexual selection. However, because person perception is one trait in a suite regulated by hormones, univariate approaches are insufficient. In this Perspectives article, quantitative genetics is presented as an important but underutilized framework for testing evolutionary hypotheses within this literature. We note tacit assumptions within the current literature on psychiatric genetics, which imperil the interpretation of findings thus far. As regulators of a diverse manifold of traits, hormones mediate tradeoffs among an array of …

Prospective Associations Of Psychedelic Treatment For Co-Occurring Alcohol Misuse And Posttraumatic Stress Symptoms Among United States Special Operations Forces Veterans, Stacey B Armstrong, Yitong Xin, Nathan D Sepeda, Martín Polanco, Lynnette A Averill, Alan K Davis

Faculty, Staff and Students Publications

This study evaluated prospective associations of ibogaine and 5-MeO-DMT treatment for risky alcohol use and post-traumatic stress disorder (PTSD) symptoms among United States (US) Special Operations Forces Veterans (SOFV). Data were collected during standard clinical operations at pre-treatment and 1-month (1 m), 3-months (3 m), and 6-months (6 m) post-treatment in an ibogaine and 5-MeO-DMT treatment program in Mexico. Of the 86 SOFV that completed treatment, 45 met criteria for risky alcohol use at pre-treatment (mean age = 44; male = 100%; White = 91%). There was a significant reduction in alcohol use from pre-treatment (M = 7.2, SD = …

Fitness Consequences Of Depressive Symptoms Vary Between Generations: Evidence From A Large Cohort Of Women Across The 20th Century, Christopher I Gurguis, Renée A Duckworth, Nicole M Bucaro, Consuelo Walss-Bass

Faculty, Staff and Student Publications

Depression has strong negative impacts on how individuals function, leading to the assumption that there is strong negative selection on this trait that should deplete genetic variation and decrease its prevalence in human populations. Yet, depressive symptoms remain common. While there has been a large body of work trying to resolve this paradox by mapping genetic variation of this complex trait, there have been few direct empirical tests of the core assumption that there is consistent negative selection on depression in human populations. Here, we use a unique long-term dataset from the National Health and Nutrition Examination Survey that spans …

2024 Yearbook, Risd Archives, Center For Student Involvement (Csi), Risd Design Guild

RISD Yearbooks

No abstract provided.