Digital Commons Network^™

Enhanced Continual Reinforcement Learning-Based Output Feedback Control Of Heterogeneous Quadrotors Formation, Ehsan Soleimani, S. Jagannathan

Electrical and Computer Engineering Faculty Research & Creative Works

This paper presents a unified framework for the safe and optimal control of heterogeneous quadrotor unmanned aerial vehicles (QUAVs) in formation, enabling multitask missions without requiring precise system dynamics. To address partial state observability, a multilayer neural network (MNN) observer is designed to estimate unmeasured states. Reinforcement learning (RL) is employed for optimal control utilizing an MNN ensuring adaptability. Barrier Lyapunov Functions (BLFs) are integrated into the RL framework to enforce safety by maintaining QUAVs within predefined constraints. An enhanced continual learning (ECL) method is proposed to improve the adaptability of MNNs. This method enables effective multitask learning while mitigating …

Spatially Distributed Optical Fiber Sensing With Weak Fiber Bragg Grating Arrays Based On Microwave Photonics, Wassana Naku, Osamah Alsalman, Chen Zhu

Electrical and Computer Engineering Faculty Research & Creative Works

Fiber Bragg gratings (FBGs) have been one of the most widely used optical fiber sensors in both scientific and industrial applications due to their unique advantages of high sensitivity, ease of signal transduction, and capabilities for remote operation and multiplexing. However, the majority of sensing systems based on FBGs can only achieve quasi-distributed sensing along the fiber under test, leaving dark zones in between discrete FBG elements. In this work, we propose and demonstrate a microwave photonics enabled approach for the interrogation of cascaded FBGs to achieve spatially distributed sensing. The core of the system includes an incoherent optical frequency-domain …

Benchmarking Deep Learning Architectures For Ecg-Based Multi-Label Heart Disease Prediction Using Mimic-Iv Database, Eyiara Oladipo, Sarwar Nazrul, Mohamed Nafea

Electrical and Computer Engineering Faculty Research & Creative Works

Cardiovascular disease (CVD) is a leading cause of global mortality, accounting for an estimated 17.9 million deaths annually. CVD is broadly defined as a group of medical conditions influenced by modifiable or non-modifiable risk factors that affect the heart's ability to function properly. Machine learning (ML) has emerged as a powerful tool for analyzing complex medical data, aiding in early detection and accurate diagnosis of CVD and improving patient outcomes. Recent studies proposed various deep learning (DL) architectures for detecting CVD, yet there is a lack of robust benchmarks for comparing their performance on large-scale databases. In this work, we …

Ethics Vs.. Regulation: Converging Frameworks For Trustworthy Human-Centered Ai In Biomedical Research, Tayo Obafemi-Ajayi, Tiffani J. Bright, Emily F. Wong, Donald Wunsch, Joan Peckham, Jason H. Moore

Electrical and Computer Engineering Faculty Research & Creative Works

The accelerating impact of AI in biomedical research is driving significant advances in precision medicine. As these systems increasingly shape health outcomes, the imperative to develop trustworthy, reliable, and ethically grounded AI becomes more pressing, particularly in addressing concerns related to data integrity, patient safety, and equitable outcomes. While the potential of AI to transform biomedical research is clear, its responsible integration depends on more than technological capability. Ensuring that these systems are aligned with societal values requires a dual commitment: the operationalization of ethical principles throughout the AI life cycle and the establishment of robust regulatory mechanisms. Ethics provides …

Miniaturized Wearable Biosensors For Continuous Health Monitoring Fabricated Using The Femtosecond Laser-Induced Graphene Surface And Encapsulated Traces And Electrodes, Homayoon Soleimani Dinani, Tatianna Reinbolt, Bohong Zhang, Ganggang Zhao, Rex E. Gerald, Zheng Yan, Jie Huang

Electrical and Computer Engineering Faculty Research & Creative Works

Wearable sensors are increasingly being used as biosensors for health monitoring. Current wearable devices are large, heavy, invasive, skin irritants, or not continuous. Miniaturization was chosen to address these issues, using a femtosecond laser-conversion technique to fabricate miniaturized laser-induced graphene (LIG) sensor arrays on and encapsulated within a polyimide substrate. The femtosecond laser-converted conductive traces can have a size of 20 to 2 μm compared to the traditionally larger CO2 laser dimensions of around 300 to 100 μm. This marks a 93-98% decrease in trace size when using a femtosecond laser. This miniaturization allows for the ability to process temperature, …

Wasting Disease Of A Marine Foundation Species Links Community Interactions To Disease Dynamics, Lillian R. Aoki, Olivia J. Graham, Reyn M. Yoshioka, Rebecca Maher, Lindsay Alma, Eileen E. Hofmann, Colleen A. Burge, Drew Harvell, Maya L. Groner

CCPO Publications

Infectious disease plays a key role in shaping marine communities, including in seagrass meadows, which form biodiverse coastal habitats. Eelgrass (Zostera marina) is the most widespread seagrass species and is susceptible to seagrass wasting disease, caused by the protist Labyrinthula zosterae. As a foundation species, eelgrass strongly influences ecosystem structure, function and services; recent work has begun to explore the links between critical community interactions and seagrass wasting disease. Here, we highlight recent advances about how the eelgrass community regulates and responds to seagrass wasting disease, from the microbiome to herbivores and filter feeders. We further show …

Preparing The Built Environment In Grenada For Future Sea Level Rise And Extreme Precipitation Events, Rocco D. Boyd, Meagan P. Duncan, Alivia D. Markham, Adelle K. Novak, Blaizen B. Bloom, Ashawne Edwards, Jai S. Lewis, Hans-Peter Plag

CCPO Publications

[Introduction] Communities across the globe are being affected by climate change in numerous ways. However, those most often affected, especially by sea level rise, are those small island nations that are pressed for space already; this includes the island of Grenada. Grenada is located in the southern portion of the Caribbean and is bordered by the Caribbean Sea (West) and the Atlantic Ocean (East). The planning and development authority (PDA) has been identified as the main stakeholder involved in this case study, but recommendations will be made to all parties involved to best accomplish our mission.

Key stakeholders were initially …

Residual Effect Of Silicate Agromineral Application On Soil Acidity, Mineral Availability, And Soybean Anatomy, Mariana De Carvalho Ribeiro, Antonio Ganga, Isabella Silva Cattanio, Aline Redondo Martins, Rodrigo Silva Alves, Luís Gustavo Frediani Lessa, Hamilton Seron Pereira, Fernando Shintate Galindo, Marcelo Carvalho Minhoto Teixeira Filho, Cassio Hamilton Abreu-Junior, Gian Franco Capra, Arun Dilipkumar Jani, Thiago Assis Rodrigues Nogueira

Biology, Agriculture and Chemistry Faculty Publications and Presentations

Silicate agrominerals (SA) may be sustainable soil amendments that can minimize dependence on conventional fertilizers (CF). We evaluated the residual effects of SA application as a source of Si and as a soil remineralizer, using soils with contrasting chemical-physical features cultivated with soybean. The experiment was conducted under greenhouse conditions and treatments were arranged in a 5 × 2 + 2 factorial scheme: five rates of SA, two soils in addition to CF. The soil was incubated before cultivation, followed by the sequential sowing of corn and soybean. At the R4 phenological stage, when the pods were fully developed, soybean …

From Microbes To Molecules: Synthetic Biology Approaches For Advanced Materials Design, Roshini Ramachandran, Frank Macabenta, Grace Bettencourt, Shulammite Feng

Biology, Agriculture and Chemistry Faculty Publications and Presentations

Traditional materials synthesis often involves energy-intensive processes with significant waste generation and limited control over material properties. This review examines synthetic biology as a sustainable alternative for designing advanced materials with enhanced precision and versatility. It explores microbial biomineralization, detailing how microorganisms influence the formation of mineral deposits and participate in key biogeochemical cycles. It highlights recent research advancements in using a wide variety of microorganisms for the synthesis of inorganic materials such as metal and metal oxide nanoparticles, quantum dots, magnetic nanoparticles, and thin films. The review also discusses the production and properties of various biopolymers. Important factors that …

Cultural Factors In Alcohol And Other Drug Use Among Immigrant Youth In Western Australia: A Qualitative Investigation, Justin Dandy, Caroline Ng Tseung-Wong, Amanda M. George, Byron L. Zamboanga, Vilma Palacios

Psychological Science Faculty Publications and Presentations

Objectives: Our aim was to identify the influence of heritage cultural factors and mainstream Australian cultural norms on young culturally and linguistically diverse (CaLD) immigrants’ alcohol and other drug (AOD) use attitudes, motives for use, and behaviors. Method: We conducted nine focus groups with 55 youth (aged 16–30; 22 female, 33 male). Participants were from diverse cultural backgrounds including India, Sri Lanka, Ethiopia, Eritrea, Sudan, Hazara-Afghanistan, Burma (Chin and Karen), Malaysia, Singapore, and China. They were first- (80%) and second-generation immigrants to Australia. Results: We constructed three overarching themes: bicultural conflict, freedom versus constraints, and the intersection of gender …

Epilepsy Clinic Analytics: Leveraging Emr Reporting Tools To Characterize Center Volume And Complexity, Vanuli Arya, Arindam Ghosh Mazumder, Muna Nnamani, Mark A Abboud, Samuel C Lee, Michael S Guzman, Vaishnav Krishnan

Faculty, Staff and Students Publications

Introduction: Epilepsy centers connect patients to multidisciplinary provider groups that can coordinate surgical interventions and/or investigational treatments. Automated techniques to cross-sectionally review patient volume and complexity may reveal objective metrics to assign appropriate personnel and resources. Here, we leveraged an electronic medical record (EMR) reporting tool to examine how patient and visit volumes, antiseizure medication (ASM) prescriptions and neuromodulation use evolved over an 11-year epoch at a single level 4 adult epilepsy center in Texas, USA.

Methods: Using Epic Workbench Reporting, we acquired the dates of (i) all clinic visits (office or telemedicine), (ii) CPT codes for neuromodulation interrogation/programming, and …

Bayesian Covariate-Dependent Circadian Modeling Of Rest-Activity Rhythms, Beniamino Hadj-Amar, Vaishnav Krishnan, Marina Vannucci

Faculty, Staff and Students Publications

We propose a Bayesian covariate-dependent anti-logistic circadian model for analyzing activity data collected via wrist-worn wearable devices. The proposed approach integrates covariates into the modeling of the amplitude and phase parameters, facilitating cohort-level analysis with enhanced flexibility and interpretability. To promote model sparsity, we employ an l1-ball projection prior, enabling precise control over complexity while identifying significant predictors. We assess performances on simulated data and then apply the method to real-world actigraphy data from people with epilepsy. Our results demonstrate the model’s effectiveness in uncovering complex relationships among demographic, psychological, and medical factors influencing rest-activity rhythms, offering insights for …

Internal Carotid Artery Sympathetic Plexus Neurofibroma – A Case Report, Pedram Daniel Maleknia, Victor Lara, Ailiang Zeng, Michael Benjamin Larkin, Vijay Nitturi, Diego Rojas, Sean Lau, Elizabeth Ledbetter, Akash J Patel

Faculty, Staff and Students Publications

Background: Neurofibromas are benign peripheral nerve sheath tumors most associated with neurofibromatosis type 1 (NF1 ). NF1 is an autosomal dominant disorder resulting from mutations in the NF1 gene located on chromosome 17. While neurofibromas frequently occur in cutaneous or plexiform forms, neurofibromas arising from the sympathetic plexus of the internal carotid artery (ICA) are rare. Only one case of an intracranial sympathetic plexus neurofibroma has been reported in the literature to date. Since most nerve sheath tumors arising from this region are schwannomas, and given the intimate association with the Internal carotid artery (ICA) and surrounding neurovascular structures of …

Cadherin 1 Germline Mutation Co-Occurs With Medullary Thyroid Cancer And Choroid Plexus Papilloma: A Case Report And Review Of Literature, Vijay Nitturi, Sricharan Gopakumar, Hsiang-Chih Lu, Akash J Patel

Faculty, Staff and Students Publications

Background: We describe the case of a 23-year-old woman with a history of medullary thyroid cancer (MTC) who presented with a choroid plexus papilloma (CPP) and review the literature regarding the co-occurrence of these two pathologies.

Case description: A 23-year-old woman with a history of MTC treated with thyroidectomy 3 months prior was referred to neurosurgery with an incidental fourth ventricular mass found on prior imaging of her neck. She presented to the clinic with intermittent headaches and underwent MRI which demonstrated a hyperintense, heterogeneously enhancing lobular mass at the obex of the fourth ventricle. She underwent suboccipital craniotomy and …

The Gut-Brain Axis: Investigating The Effects Of Diet, Physical Activity, And Prior Adversity On Anxiety Via Autonomic Nervous System, Jenna L. Pennella

UNF Graduate Theses and Dissertations

Previous literature has highlighted a bidirectional relationship between the gut and brain called the gut-brain axis (de Punder & Pruimboom, 2015; Hill et al., 2008; Leistner & Menke, 2020). The current study aimed to investigate directional relations between different stressors (e.g. poor diet, vigorous activity, and prior adversity) and anxiety and how interactions with gut issues and autonomic dysfunction may impact these relationships. Based on previous literature, we examined (a) physical activity and diet as moderators of stress and anxiety as well as stress and GI symptoms, (b) GI symptoms as a mediator between various predictors (i.e., diet, stress, physical …

Traffic Safety In Tacoma: A Dual Study On Community Perceptions Of Vision Zero And The Application Of The Safe System Framework, Janeroza W. Matyenyi

UNF Graduate Theses and Dissertations

The city of Tacoma adopted Vision Zero in 2020 and is planning to achieve zero traffic deaths and severe injuries by 2035. As part of its outreach plan to engage the local community, the city of Tacoma’s Vision Zero team surveyed the critical issues affecting traffic safety as perceived by road users. One of the Vision Zero strategies is to implement safer speeds across streets by reducing speed limits that are too high. This study aims to analyze the factors influencing the perceptions of speeding and high-speed limits as safety concerns, analyze narratives from respondents on issues affecting traffic safety, …

Leucine Catabolism Is Associated With Longevity In Female Eastern Lubber Grasshoppers, Kerri R. Conklin

UNF Graduate Theses and Dissertations

Background & Aims: Dietary isoleucine restriction can improve metabolic health and increase lifespan. It has been hypothesized that shifts in branched-chain amino acid catabolism drives this longevity effect. Impaired branched-chain amino acid catabolism is linked to several age-related diseases. We investigated whether dietary isoleucine restriction increases leucine catabolism and associates with longevity and full reproduction.

Methods: In two experiments, adult female Eastern Lubber grasshoppers (Romalea microptera) were assigned to either a high-quality diet (Balanced ile), or diets with varying isoleucine content (Moderate ile-R and Severe ile-R). In Experiment 1, we used a low-energy (Low Lettuce) group as a positive …

Understanding Shifts In Student Satisfaction Between Peak And Post Pandemic, Brian Verkamp

UNF Graduate Theses and Dissertations

This study investigates student satisfaction in online learning environments at the University of North Florida (UNF), with a focus on how satisfaction levels have fluctuated between the peak-pandemic and post-pandemic periods. Utilizing a combination of descriptive and inferential statistical techniques, the research examines the relative importance and satisfaction ratings of various educational factors, including demographic influences such as gender, race, and academic program. By creating a composite measure of overall student satisfaction, this study provides a comprehensive analysis of the factors that most significantly impact student experiences in online courses. Findings highlight the critical role of both satisfaction and importance …

Diversity Makes Me Uncomfortable: Effects Of Diversity Language On University Student Belonging, Ziena Baker

UNF Graduate Theses and Dissertations

Diversity statements and experiences form the first impressions students have of their prospective universities and employers, setting the stage for perceived feelings of belonging, otherness, and comfort within new environments (Baleria, 2021; O’Keeffe, 2013; Starck et al., 2021). Diversity statements can signal feelings of comfort and belonging or feelings of stress depending on the way in which diversity is framed (Chaney, 2022; Trawalter et al., 2016). This is especially true for students, who are more often affected mentally and physically by changes in university diversity perspectives (Sladek et al., 2021) The current study thus uses a novel blood pressure measure …

What’S For Dinner? A Multi-Pronged Approach Investigating The Foraging Habits And Diet Of St. Johns River Bottlenose Dolphins (Tursiops Erebennus), Andrea Leigh Swinehart

UNF Graduate Theses and Dissertations

Wildlife population management depends on knowledge of the population’s foraging ecology. A community of resident Tamanend’s bottlenose dolphins (Tursiops erebennus) utilizes the St. Johns River (SJR) in Jacksonville, Florida, and members of the community are regularly sighted emaciated or with skin lesions. Anthropogenic disturbances may contribute to further health decline, therefore Chapter One analyzed SJR foraging dolphin group habitat use before, during, and after a large-scale dredging event known as the Jacksonville Harbor Deepening Project (JHDP). Kernel density estimates (KDEs) of foraging dolphin group sightings were generated to estimate 95% utilization distributions (i.e., foraging home ranges) for three …

The Presence Of Mercury (Hg) And Perfluoroalkyl Substances (Pfas) In The Guana And Tolomato Rivers, Morgan E. Lattomus

UNF Graduate Theses and Dissertations

The Guana and Tolomato Rivers provide essential habitat for several ecologically and economically important species and is a well-loved and recreated area. Spanning the northeastern Florida coast, the rivers are home to over 50 endangered or threatened species and host several habitat restoration projects due to their ecological significance and proximity to development along the coast. The effects of human influence and pollution, and specifically toxic metal mercury (Hg) and perfluoroalkyl substances (PFAS), are not well known within the system. Hg is known to biomagnify within food webs, and there is a considerable lack of literature concerning PFAS behavior within …

Connecting Bicyclists And Transit: A Multimodal Routing Tool With Bicycle Facilities Scoring, Raphael Y. Mrema

UNF Graduate Theses and Dissertations

This research develops a comprehensive, data-driven framework for assessing multimodal bicycle accessibility using open-source technologies and real-time routing data. Traditional active transportation studies often depend on proprietary GIS tools and static network datasets, which limit scalability, reproducibility, and integration with live mobility systems. In contrast, this study introduces a Python-based approach that leverages GeoPandas, the Google Maps Directions API, and General Transit Feed Specification (GTFS) data to dynamically evaluate infrastructure quality, operational stress, and multimodal connectivity. The framework was applied to Duval County, Florida, to examine how roadway design, facility type, and transit availability jointly influence bicycle network performance and …

Faculty Involvement In Decision-Making Within Florida's State University System: Understanding Perception, Role, And Participation In Shared Governance, Elaine R. Mitchum

UNF Graduate Theses and Dissertations

Shared governance is the collaborative responsibility of faculty, administrators, and governing boards to guide institutional decision-making in colleges and universities. Faculty participation is essential in high-stakes decisions, as their disciplinary expertise and practical experience help ensure that policies align with academic values and long-term institutional goals. This qualitative case study examines faculty perceptions, roles, and participation in shared governance across the twelve institutions within the State University System (SUS) of Florida. Guided by four research questions, the study explored: (1) how faculty describe shared governance; (2) how perceptions of their role vary; (3) how recent events within the Florida SUS …

Annual Report, Fiscal Year 2025, Tennessee. Bureau Of Investigation

Annual Reports

This document is the annual report for the TBI during the fiscal year.

Factors Associated With Health Decision-Making Autonomy On Own Healthcare Among Tanzanian Women: A 2022–2023 Demographic Health Survey Study, Tausi Seleman Haruna, Henry Ofori Duah, Rebecca Lee

College of Nursing Faculty Research and Publications

Background

Women’s health decision-making autonomy is fundamental for the health and well-being of women and their children. It empowers women to make health decisions and exercise their rights and choices surrounding their health. Like most parts of Africa, women’s autonomy in Tanzania remains contentious, with an estimated 19% prevalence of health decision-making autonomy in 2015. Given the impact of women’s health decision-making autonomy on women’s health outcomes and the fact that women’s health decision-making autonomy is an ongoing process affected by advancements in technology, economic growth, and social and cultural shifts, understanding the sociodemographic correlates of women’s autonomy is imperative. …

Sex Work Patterns Among Transgender And Gender Diverse People: A Latent Class Analysis, Madeline Stenersen, Anjum Umrani, Irelan Fricke, Jessica L. Zemlak

College of Nursing Faculty Research and Publications

Sex work is a diverse profession encompassing a broad range of people, and services. Though overrepresented in sex work communities, transgender and gender diverse (TGD) individuals are underrepresented in sex work literature. Further, sex work literature continues to underrepresent the heterogeneity evident in the sex work community and the practices that occur within it. The present study utilized data from the 2015 United States Transgender Survey (USTS) to conduct a latent class analysis (LCA) to identify patterns of different types of sex work among TGD adults (N = 2,153) and understand the demographic characteristics associated with engagement in different types …

“Ringleader Who Has No Power”: A Qualitative Study Of Parent Uncertainty During A Nicu Admission Unrelated To Prematurity, Erin Rholl, Steven R. Leuthner, Kathryn J. Malin, Joanne Lagatta, Krisjon R. Olson

College of Nursing Faculty Research and Publications

Background

Parents of preterm infants experience stress related to uncertainty which impacts parent health outcomes. Less is known about the experience of parents whose infants are admitted for reasons other than prematurity. In this study we sought to describe (1) the experience of parents whose infants are admitted to a level IV NICU for reasons unrelated to prematurity in relation to uncertainty and (2) the effect of social and structural determinants on parent experience with uncertainty.

Methods

This single center qualitative study utilized interviews, questionnaires, and chart review at 2 time points: 2 weeks after admission and 3 months after …

Critical Care Advanced Practice Providers As Partners In Advancing Pediatric Intensive Care Unit Nursing Knowledge: A Needs Assessment., Mary Seidl, Meghan Roller, Whitney Seul, Laura Rose, Christine A. Schindler

College of Nursing Faculty Research and Publications

Background

Critical care advanced practice providers (APPs) are frontline providers in many pediatric intensive care units (PICUs). From 2020 to 2022, there was a significant downward shift in nursing experience level in the PICU at the authors’ institution. APPs may help provide additional in situ education.

Methods

Data were collected using role-specific needs assessment of PICU nursing staff and providers, assessing concept related to knowledge and job stress.

Results

Findings overwhelmingly demonstrated desire for more APP-led education. Overall, 27% of nurse respondents strongly agreed that current knowledge was adequate to provide safe and best care for their patients, and 47% …

The Community College Library: A Historical Literature Review, Samantha Minnis

Books and Contributions to Books

Community college libraries are busy places, where no two days are the same. In the midst of the busyness of the day-to-day work, there is value in taking time to reflect. The act of writing this chapter is one way of taking time to reflect on the literature produced by community college library professionals over the last thirty years. It is the author’s hope that this review will produce a picture of some of the stories of community college libraries and how they strive to serve their students.

In examining the literature, several main themes arose to describe the conversations …

2024 Liaison And Instruction Impact Report, Emily Frigo, Maya Hobscheid, Jon Jeffryes, Delaney Jorgensen, Hazel Mcclure

Library Reports and Communication

This report provides an overview of the Libraries’ impact in teaching information literacy. Our Teaching and Learning Philosophy describes our student-focused approach and acknowledges “learning and teaching moments occur in a wide variety of contexts, including one-on-one reference consultations, while working on assignments, in the classroom, while considering personal and academic decisions.” Librarians partner with teaching faculty to design research assignments, collaborate on strategic scheduling of library instruction sessions, and cultivate collections to support student learning.

This report shows a snapshot of the work of our liaison and instruction librarians. Instructional approaches and liaison workloads continuously evolve and shift to …