Digital Commons Network^™

Assessing The Kinematics And Kinetics About The Knee With An Isokinetic Dynamometer And Force Plates During Field-Based And Lab-Based Trials., Samantha Ann Searles

Theses and Dissertations

The incidence rate in knee injuries has increased over the last 20 years, with women at a 2-8 times higher incidence rate compared to men. This is likely a result of lower neuromuscular control of the trunk, generating less hip muscle activation, and more reliance on the quadriceps, alongside reduced hip, knee, and dorsiflexion angles, paired with increased knee valgus angles, ground reaction forces (GRF), hip adduction, and knee rotation upon landing from jumps. The focus of this study is to determine if knee kinetics and kinematics during field- and lab-based trials are associated with knee injury predictors. Theoretically, if …

Design And Evaluation Of A 5g Testbed: Analyzing Security Solutions, Iq Sample Management, And Performance Visualization, Mohammed Saleh Shaik

Theses and Dissertations

The evolution of 5G networks has introduced new opportunities for high-speed, low-latency wireless communication, supporting a wide range of applications from industrial automation to secure data transmission. However, as 5G networks become more complex, ensuring security and maintaining optimal performance present significant challenges. This thesis explores the development of a 5G testbed using Software-Defined Radios (SDRs) and open-source platforms to analyze signal behavior, security implementations, and performance. The testbed, built with the open source srsRAN software library and widely available SDR hardware, serves as a controlled environment for studying 5G communications security features and innovations. To evaluate transmission characteristics, in-phase/quadrature …

Costs And Challenges In The Mississippi Log Trucking Industry, James Tucker Shannon

Theses and Dissertations

Challenges impacting Mississippi log trucking businesses include escalating production costs, labor shortages, aging ownership, and rising liability insurance premiums. These concerns are transmitted back to loggers, landowners, and the entire forest products industry, reducing their contributions to the state’s economy. Lack of current knowledge concerning the adaptation of Mississippi log trucking companies under adverse business conditions necessitated a statewide mixed-mode survey to determine the industry’s structure, the nature of liability insurance premiums, and business owner perceptions about driver hiring and profitability. Mississippi log trucking business owners and drivers were predominantly middle-aged, with fewer individuals under the age of 40. Log …

Impact Of Fertilizer Timing And Cover Crop Establishment Methods On Bedded Soybean Cropping Systems In Mississippi, Grant Madison Shavers

Theses and Dissertations

Mississippi’s agriculture faces challenges from high rainfall, bedded cropping systems, and varying soil testing methods. Many producers apply phosphorus (P), potassium (K), and sulfur (S) in the fall to reduce spring workload and rain-related delays. While fall fertilization raises concerns about yield losses, research indicates minimal differences in soybean (Glycine max L.) yield between fall and spring applications. Raised beds also limit cover crop (CC) establishment despite their potential benefits. We explored strategies to integrate CCs into bedded systems while assessing bed stability and residue management during soybean production. Additionally, Mississippi’s use of two soil nutrient extraction methods highlights the …

Projected Future Reservoir Impairment In The Conterminous United States Following Three Climate Change Scenarios, Darren James Shoemaker

Theses and Dissertations

Anthropogenic climate change has been associated with reservoir aging and reduced ecosystem function. Communities throughout the world depend on reservoirs for services such as hydropower, drinking water, flood mitigation, and recreational opportunities. Though reservoirs were typically constructed to meet human needs, they are now also acknowledged as supporting biodiverse aquatic communities. Reservoir managers are expected to maintain services and biodiversity demanded by diverse users despite high uncertainty surrounding how climate will influence reservoirs through time. Additionally, data describing reservoir function at broad spatial extents are often either unavailable, incompatible between agencies, or prohibitively resource-intensive to obtain. Expert opinion surveys are …

Enhancing Profitability In The Air Transport Industry Through Improved Air Passenger Forecasting: A Comparative Analysis Of Arima, Holt-Winters And Lstm Time Series Forecasting Techniques, Megan Skowronek

Theses and Dissertations

Predicting air passenger volumes is crucial for airports and airlines seeking to reduce costs and enhance profitability. Accurate forecasting enables better planning and efficiency improvements within the air transport industry. This study applies LSTM, ARIMA and HW to U.S. air passenger datasets. Each analysis shows a methodology for predicting air passenger volumes across airports, airlines and across airports and airlines simultaneously. ARIMA was found to have limited applicability, since only a subset of the datasets was stationary. LSTM and HW were applicable to all airlines and ARIMA was applicable to no airlines. LSTM had less error compared to HW at …

An Exploratory Mixed-Methods Investigation Of Previous Sexual Health Communication Between Lesbian, Gay, Bisexual, Or Queer Young Adults And Their Parents, Haley Elizabeth Solace

Theses and Dissertations

Research suggests parent-child communication about sexual health can promote positive sexual health outcomes (e.g., Estrada-Martinez et al., 2020; Jayne et al., 2021); however, parent-child sexual health conversations are often infrequent and heteronormative (Estes, 2017). Few studies explore sexual health communication between LGBQ youth and their parents. This study explores previous experiences with parent-child sexual health communication between seven LGBQ young adults, aged 18 to 26, and four of their heterosexual mothers, to better understand parent-child sexual health communication and differences between parental-child reflections. Findings suggest LGBQ young adults and parents recall similar experiences, however, perceived discomfort and parental competency differently. …

Does An Adapted Swimming Program Improve Self-Efficacy In Individuals With Intellectual Disability?, Georgia Grace Starr

Theses and Dissertations

BACKGROUND: Short-term adapted swimming programs may improve self-efficacy in individuals with intellectual disability (ID). PURPOSE: We investigated if self-efficacy was improved from the perspectives of swimmers, their parents, and volunteering staff. METHODS: A 5-day program (60 min∙day-1) focused on swim skill development and independence, with each participant supported by a volunteer without disability. Semi-structured interviews were conducted with 5 swimmers (14–35 years, 4 females), 5 parents (40–70 years, all mothers), and 5 volunteers (17–64 years, 4 females). Analysis, using open, structured, and focused coding, highlighted themes aligning with Bandura’s Self-Efficacy Theory (SET)—previous experience, vicarious experience, social persuasion, and feedback—and Self-determination …

Zeroizing Trust In A Naïve Federated Zero Trust Environment, Keith E. Strandell

Theses and Dissertations

The position of the United States on the global stage is predicated on information dominance and the ability to project power through cooperative engagements with mission partners in both wartime and peacetime. Recent cyber-attacks highlighted the need for a more robust cybersecurity posture. As the United States progresses toward the adoption of Zero Trust, it is incumbent on the Department of Defense to assess the impact to the ability to share data across strategic partnerships while securing the data of both the United States and its partners. This paper proposes research into ensuring an environment rooted in Zero Trust and …

Effects Of Environmental Stress And Antimicrobials On The Health, Microbiome, And Product Shelf-Life Of Channel And Hybrid Catfish, Guyue Tang

Theses and Dissertations

Two studies investigated various aspects of channel and hybrid catfish production and processing. The first study examined the effects of ammonia stress (15 mg/L vs. 1 mg/L control) on growth performance and fillet quality. While channel catfish demonstrated superior growth, ammonia stress minimally impacted the sensory profiles of both species. Gut microbiota analysis revealed species-specific differences, with Lactococcus lactis dominating hybrid catfish communities. The second study evaluated buffered vinegar treatment (1.5%) on fillet shelf life during refrigerated storage. Vinegar-treated fillets maintained better microbiological quality, with aerobic plate counts remaining below 7 log cfu/g through day 6, while untreated fillets exceeded …

Synthetic Data Augmentation For Retinoblastoma Using Diffusion, Andrew Thompson

Theses and Dissertations

Many AI models rely on large and high quality datasets for optimal training. In certain cases, data can be difficult or expensive to obtain, making training difficult. Rare medical conditions are one of these cases. Datasets for retinoblastoma are severely lacking in quantity. Diffusion has been used to create synthetic data in the industrial, medical, and financial domains. By applying the latest Diffusion methods to retinoblastoma, this work seeks to improve predictive model performance on identifying retinoblastoma.

“Here For Everyone” (?): How Intimate Partner Violence Service Organizations Address Community Needs And Transgender Inclusion In The Deep South, Brian Tesch

Theses and Dissertations

Transgender individuals face disproportionately high rates of intimate partner violence (also known as IPV) when compared to other sociodemographic groups. Despite this prevalence, IPV service organizations in the Deep South (e.g., Alabama, Georgia, Louisiana, Mississippi, and South Carolina), a region of the U.S. encompassing several rural communities and characterized by traditional gender norms and conservative Christian religious values, may have difficulties meeting the unique needs of transgender IPV survivors. This dissertation explores two key areas: (1) the perceptions of IPV service organization staff members in the Deep South concerning how their agencies assist members of the transgender community, and (2) …

A Fine-Tined Bert Model For Improved Querying Of The Unmanned Aerial System Integration Safety And Security Technology Ontology, Minh Hong To

Theses and Dissertations

The use of unmanned aerial vehicles (UAS) in all industries is steadily increasing every year. To govern the use of UAS, the Federal Aviation Administration (FAA) seeks to provide a foundation of rules and regulations for UAS operation in the National Airspace System (NAS). The UAS Integration Safety and Security Technology Ontology (ISSTO) was developed using the Web Ontology Language (OWL) in 2023. In 2024, a query application was developed to search ISSTO for information about the safety and security of UAS operations. While the application is functional, the search results can be further fine-tuned to match what the user …

The Role Of K-12 Educators In Shaping Stem Pathways: Examining Social Capital And Self-Efficacy In Stem Education, Holly Trisch

Theses and Dissertations

This dissertation examines the impact of K-12 educators on students’ pathways in STEM (Science, Technology, Engineering, and Mathematics) by focusing on two main factors: the social capital of K-12 and elementary school teachers and the self-efficacy of preservice teachers in STEM education instruction. The first study investigates the social capital of first year engineering students, emphasizing the relationships and resources they gained during their K-12 education that influenced their decision to major in engineering. A quantitative study using survey data collected from first-year undergraduate engineering students indicates that K-12 educators play a crucial role by providing mentorship and resources that …

Estimation Of Soybean Root Traits Using Computer Vision And Deep Learning, Muhammad Usman

Theses and Dissertations

Root phenotyping provides insights into root structure, function, and response to environmental stimuli, aiding researchers in improving crop yields, developing new plant varieties, and enhancing plant health. Traditionally, measuring root traits, such as length and area, is manual, time-consuming, and resource intensive. This study introduces a deep learning-based computer vision method for soybean root segmentation and traits estimation using RGB (red, green, blue) images captured under controlled illumination. A separate web-based application was also developed that can extract the root length and area using RGB images. A diverse set of 3,363 soybean root images was collected using an in-house root …

Shifting Sands: Moving From Reality To Unreality, Aaron Waterson

Theses and Dissertations

This is a series of stories that shifts from literary fiction to science fiction, each with their own inspiration and message. Inspirations include The Twilight Zone, Benjamin Percy, Da-Lin, Gabriel Garcia Marquez, The Sandman, and Endymion. Each of these stories is conversant with norms and traditions of storytelling and the connections between these and their inspirations are elaborated on in the Introduction that accompanies the collection as a whole.

Combined Effect Of Chitosan And Lemon Essential Oil-Infused Slush Ice On The Shelf Life Of Channel Catfish, Dianna Wilson

Theses and Dissertations

The objective of this research was to investigate the biopreservative effects of chitosan and lemon essential oil in slush ice treatments on the microbial shelf life of refrigerated catfish fillets. Catfish fillets were stored in slush ice treatments containing chitosan (CH), lemon essential oil (LO), a combination (CH+LO), water (CTRL), and no slush (NS) for three d at 4 C, then stored at 4C for twelve d post-slush. The growth of background microflora in catfish fillets treated with CH and CH+LO was reduced (P<0.05), maintaining total aerobic counts below 4.5 log CFU/g, while the control reached spoilage levels (>7 log CFU/g) by Day 6. Chitosan effectively extended the microbial shelf life but lowered pH, …

Work-Life Balance And The Impact Of Covid-19 On Faculty At Historically Black Community Colleges (Hbccs), Taneshia Turner Winston

Theses and Dissertations

This research study was conducted to determine how the COVID-19 pandemic affected the work-life balance of faculty at HBCCs based on their race, gender, age, marital status, and tenure status. The study employed a quantitative research design utilizing Exploratory Factor Analysis (EFA) to conduct time-based activities separately and group perception-based response variables into meaningful categories to uncover patterns. To analyze the differences in race, gender, age, marital status, and tenure status, Regression and Chi-square test analyses were used to evaluate the collected data. Regression analysis explored relationships between time spent on activities and perceptions of stress, productivity, and satisfaction. Chi-square …

Evaluating Rainfall Sensitivity Over Land To Tropical Cyclone Parameters Using Idealized Wrf, Madison C. Yawn

Theses and Dissertations

Tropical cyclones (TCs) are extreme weather events impacting the United States nearly every year. These events often cause severe damage due to the associated responses they produce including storm surge and rainfall, and the accurate estimation of these TC hazards is necessary to support coastal engineering, risk assessment, and emergency management activities. Evaluating TC-driven hazards is often done in combination with numerical models to simulate how environmental interactions alter the physical processes and responses of these storms. The purpose of this study was to simulate synthetic TC events using the Advanced Weather Research and Forecasting (WRF) model to understand how …

Myxozoan Diversity And Life Cycles In Catfish Production Ponds In Mississippi, Usa, Ethan Woodyard

Theses and Dissertations

Catfish aquaculture is a critical industry in the United States and Mississippi in particular. The industry is beset by depredation, rising feed costs, competition with imports, and loss to disease. Chief among these is the myxozoan parasite and causative agent of proliferative gill disease, Henneguya ictaluri. In chapter 2, novel molecular markers for greater resolution in species identification of these parasites are provided, allowing more robust life cycle inference, species-level identifications, and inference of evolutionary relationships through molecular phylogenetic analyses. Chapters 3–5 apply the approaches developed in Chapter 2 to a broad array of taxa beyond catfish-infecting Henneguya spp. These …

An Updated Viscoplastic Self-Consistent Model To Capture The Effects Of Residual Stress, Microstructural Heterogeneity, And Precipitation In Cold-Sprayed Aluminum Alloys, Aulora Williams

Theses and Dissertations

Cold spray additively manufactured (CSAM) aluminum alloys exhibit heterogenous microstructures and mechanical properties, primarily due to high dislocation densities, sub-grain structures, and variation in inter-particle (intersplat) bonding arising from high-velocity particle impacts. Thermal post-processing has been shown to enhance intersplat bonding, reduce high residual stress concentrations, and lower dislocation densities, thereby improving the overall mechanical properties. Building on previous advancements with a mean-field viscoplastic self-consistent (VPSC) model, integrating intersplat boundary terms, Hall-Petch relations, and physically informed residual stress parameters, the current work extends the model to include precipitates and their effects. Observations of CSAM aluminum 7050 alloy indicate precipitate congregation …

Assessing Perioperative Risks In A Mixed Elderly Surgical Population Using Machine Learning: A Multi-Objective Symbolic Regression Approach To Cardiorespiratory Fitness Derived From Cardiopulmonary Exercise Testing, Pietro Arina, Davide Ferrari, Maciej R Kaczorek, Nicholas Tetlow, Amy Dewar, Robert Stephens, Daniel Martin, Ramani Moonesinghe, Mervyn Singer, John Whittle, Evangelos B Mazomenos

Peninsula Medical School

Accurate preoperative risk assessment is of great value to both patients and clinical teams. Several risk scores have been developed but are often not calibrated to the local institution, limited in terms of data input into the underlying models, and/or lack individual precision. Machine Learning (ML) models have the potential to address limitations in existing scoring systems. A database of 1190 elderly patients who underwent major elective surgery was analyzed retrospectively. Preoperative cardiorespiratory fitness data from cardiopulmonary exercise testing (CPET), demographic and clinical data were extracted and integrated into advanced machine learning (ML) algorithms. Multi-Objective-Symbolic-Regression (MOSR), a novel algorithm utilizing …

Roles Of Class Iii Phosphatidylinositol 3-Kinase, Vps34, In Phagocytosis, Autophagy, And Endocytosis In Retinal Pigmented Epithelium, Feng He, Ralph M Nichols, Melina A Agosto, Theodore G Wensel

Faculty, Staff and Students Publications

Phosphatidylinositol-3-phosphate (PI(3)P) is important for multiple functions of retinal pigmented epithelial (RPE) cells, but its functions in RPE have not been studied. In RPE from mouse eyes and in cultured human RPE cells, PI(3)P-enriched membranes include endosomes, the trans-Golgi network, phagosomes, and autophagophores. Mouse RPE cells lacking activity of the PI-3 kinase, Vps34, lack detectable PI(3)P and die prematurely. Phagosomes containing rod discs accumulate, as do membrane aggregates positive for autophagosome markers. These autophagy-related membranes recruit LC3/Atg8 without Vps34, but phagosomes do not. Vps34 loss leads to accumulation of lysosomes which do not fuse with phagosomes or membranes with …

Ditmas Flats, Llc V. Perez

All Decisions

The Appellate Term reversed a Civil Court order that dismissed the landlord's illegal sublet claim and denied its motion to dismiss the tenant's affirmative defenses. The court held that the predicate notices, though not naming the alleged subtenant, were sufficiently reasonable to establish grounds for eviction and enable the tenant to frame a defense, reinstating the illegal sublet claim. The nonprimary residence claim was properly dismissed due to the landlord's failure to serve a statutory nonrenewal notice. The matter was remitted to the Civil Court to determine the merits of the landlord's motion to dismiss the tenant's affirmative defenses.

Tuesdai Family Irrevocable Living Trust V. Denver

All Decisions

The landlord obtained a default judgment in a nonpayment proceeding. A tenant moved to vacate the default, claiming improper service, which the Civil Court rejected. However, the Civil Court, without finding a reasonable excuse for the default, vacated the judgment and sua sponte dismissed the petition based on the merits. The Appellate Term, Second Department, reversed, holding that vacating a default judgment under CPLR 5015(a)(1) requires both a reasonable excuse for the default and a meritorious defense. The Civil Court's failure to find a reasonable excuse rendered its vacatur an improvident exercise of discretion. The Appellate Term reinstated the default …

The Organizing Role Of Function Knowledge In Scene Schemas, Teresa P. Pham

USF Tampa Graduate Theses and Dissertations

Schemata, or schemas, are conceptualized as “building blocks” of cognition that guide human information processing, object recognition, retrieval of memory, and more. Major work on schema theory was done in the 1970s, conceptualizing it as a useful framework for understanding how individuals organize knowledge and apply it to understand the world (e.g., Rumelhart, 1980). Research on schema theory has continued to have implications for reading comprehension, visual processing, and encoding and retrieval of memories. Despite the vast literature, the concept of schema itself remains loosely defined, with little consensus on how schemas are organized. This study explores whether function acts …

Psychiatric Genome-Wide Association Study Enrichment Shows Promise For Future Psychopharmaceutical Discoveries, Alexander S Hatoum, Aaron J Gorelik, Lauren Blaydon, Spencer B Huggett, Tingying Chi, David A A Baranger, Alex P Miller, Emma C Johnson, Arpana Agrawal, Ryan Bogdan

2020-Current year OA Pubs

BACKGROUND: Innovation in psychiatric therapeutics has stagnated on known mechanisms. Psychiatric genome-wide association studies (GWAS) have identified hundreds of genome-wide significant (GWS) loci that have rapidly advanced our understanding of disease etiology. However, whether these results can be leveraged to improve clinical treatment for specific psychiatric disorders remains poorly understood.

METHODS: In this proof-of-principal evaluation of GWAS clinical utility, we test whether the targets of drugs used to treat Attention Deficit Hyperactivity Disorder (ADHD), Bipolar Disorder (BiP), Generalized Anxiety Disorder (GAD), Major Depressive Disorder (MDD), Post-Traumatic Stress Disorder (PTSD), Schizophrenia (SCZ), Substance Use Disorders (SUDs), and insomnia (INS), are enriched …

The Role Of Organizational Characteristics In Intervention Sustainment: Findings From A Quantitative Analysis In 42 Hiv Testing Clinics In Vietnam, Sophia M Bartels, Byron J Powell, Et Al.

2020-Current year OA Pubs

BACKGROUND: Evidence-based intervention (EBI) sustainment is one of public health's largest translational research problems. Fewer than half of public health EBIs are sustained long-term, and sustainment challenges are even more pressing in low and middle-income countries (LMICs). Organizational characteristics, including organizations' inner structures, culture, and climate, may play a key role in EBI sustainment. However, little quantitative research has examined these relationships, particularly in LMICs.

METHODS: In this observational study, we assessed the association between baseline organizational characteristics and EBI sustainment within a cluster randomized implementation trial in Vietnam testing strategies to scale-up Systems Navigation and Psychosocial Counseling (SNaP) for …

Failure Characterization Of Aluminum Resistance Spotwelds Using Ls-Dyna & Developing Machine Learning Model To Predict Spotweld Failure Parameters And Test Results, Akshay Arthur Kulkarni, Joao Felipe Carvalho De Moraes, Aaditya Lakshmanan, Sazol Kumar Das, Lily Ann Slabbert, Ashwin Yeagappan

Defensive Publications Series

[0001] This project developed methodology to create failure cards for aluminum resistance spotwelds using LS-DYNA, with a project objective to achieve reasonable accuracy (>90%). Rigorous testing and simulation activities were conducted while developing the methodology. The methodology includes mathematically fitting a failure model to match the test data efforts and deviation from the test data. Weld development and the testing process included weld schedule development through robustness testing and microhardness testing to study heat affected zones around the weld nugget properties. Welded coupons were cross-sectioned to analyze for cracks and porosity in the weld nugget. Eventually, lap shear, coach …

Integrating Social Work In An Aboriginal Community Controlled Health Service Primary Health Care Setting: The First Three Months Of Data, Ines Sofia Zuchowski, Erin Waters, Albert Kuruvila, Brodie Kuhn, Rebecca Lee

Journal of the Australian Indigenous HealthInfoNet

Background

Social work within General Practice is an emerging contributor to primary healthcare aiming to address social determinants of health. Aboriginal and Torres Strait Islander people experience higher rates of health inequity and racism than non-Indigenous Australians. The Townsville Aboriginal and Islander Health Service [TAIHS] is an Aboriginal and Torres Strait Islander Community Controlled Health Service [ATSICCHS] whose mission is to deliver culturally appropriate services to achieve better health and wellbeing outcomes for Aboriginal and Torres Strait Islander people.

Objective

This article reports on the first three months of data collection of a social worker employed at TAIHS as part …