Digital Commons Network^™

Online And Adjusted Human Activities Recognition With Statistical Learning, Yanjia Zhang

USF Tampa Graduate Theses and Dissertations

Wearable human activity recognition (HAR) is a widely application system for our daily life. It hasbeen built in many devices, such as smartphone, smartwatch, activity tracker, and health monitor. Many researchers try to develop a system which requires less memory space and power, but has fast and accurate classification results. Moreover, the objective of adjusting the classifier by the system self is also a study direction. In the present study, we introduced the machine learning methods to both smartphone data and smartwatch data and an adjusted model with the continuous generating data. Further, we also proposed a new HAR system …

Development Of Small-Scale Power Supplies For Wearable Medical Diagnostic Devices, Donny Stiner

USF Tampa Graduate Theses and Dissertations

As devices continue the trend of becoming increasingly smaller in scale to allowfor wearability, the power supply modules driving these technologies will in turn become reduced in size as well. This progression will call for advanced techniques to fabricate power supplies on wearable device platforms which still permit the circuit to operate effectively. One such crucial technique, which is discussed in this thesis, is the implementation of power saving measures to increase battery lifespan on wearable devices.

Equipment found in the medical field today can be quite bulky and requireinconvenient means of transportation and take up an excessive amount of …

Seasonality In Competence To Transmit West Nile Virus For A Widespread Reservoir, Kyle L. Koller

USF Tampa Graduate Theses and Dissertations

All organisms face a central conflict; a limited supply of resources must beoptimally allocated to competing biological functions. Utilizing robust immune defenses can be energetically costly;, thus, immune function is often diminished when other processes, such as reproduction, molt, or migration demand energy. As wild animals residing in temporally dynamic environments face seasonal patterns in resource availability, infectious disease risk, and environmental suitability, many species have evolved endogenous biological rhythms so that the performance of reproduction, molt, or migration and the associated trade-off with immune function be completed when doing so best promotes fitness. In turn, this demand to optimize …

The Media Reproduction Of Racial Violence: A Content Analysis Of News Coverage Following The Death Of George Floyd Jr., Keylon Lovett

USF Tampa Graduate Theses and Dissertations

The media has played a critical role in reproducing anti-Black violence in the United States, which has often harmed African American communities. Historically, the white press has depicted graphic imagery and descriptions of Black people being brutalized, with little ethical regard to their harmful effects. The Black press has historically challenged negative portrayals in the white media and shown more nuance, to protect the Black audience it represents. This dynamic underpins media depictions of racial violence still seen today. Darnella Frazier’s video capture of George Floyd’s death by Minneapolis police, was widely shared in the weeks following the incident, across …

Multi-Material Hybrid Additive And Subtractive Manufacturing Of Photonic Devices, Roger Brandon Tipton

USF Tampa Graduate Theses and Dissertations

Optoelectronics focuses on the application of electronic devices that utilize forms of electromagnetic radiation including visible light and other wavelengths including ultraviolet and infrared. Optoelectronics typically include devices that emit light and detect light. Devices created using this technology include light-emitting diodes, laser diodes, photoresistors, photodiodes, solar cells, phototransistors, and fiber optics. Fiber optic interconnects are interesting devices in that they are used in conjunction with optoelectronic devices to transmit information between individual optoelectronic components.

Optoelectronics are typically produced by traditional lithography methods including etching, writing, and printing on rigid silicon substrates for fabricating devices. Other techniques like glass or …

Driving Health Care Results With Authenticity, Kindness, And Vulnerability: A New Model Of Authentic Leadership, John D. Couris

USF Tampa Graduate Theses and Dissertations

Current management scholars have defined authentic leadership as consisting of four dimensions: relational transparency, self-awareness, balanced processing, and internalized moral perspective. This research extends the concept of authentic leadership to include kindness and vulnerability. I created two scales to measure kindness and vulnerability within the context of leadership and used them to examine perceptions of authentic leadership and its impact on three organizational outcomes: trust in one’s leader, work engagement, and psychological safety. Using a two-group, pretest-posttest experimental design, 44 Tampa General Hospital managers were either selected to participate in a four-hour authentic leadership training that included instruction on kindness …

Polyethyleneimine-Based High Yield Fluorescent Soluble Covalent Organic Framework, Haonan Wang

USF Tampa Graduate Theses and Dissertations

In this thesis, we report a novel covalent organic framework (COF) with fluorescence and water-soluble features, F-COF-PT with high gravimetric yield (~ 89%), that was generated by the reactions of branched polyethyleneimine (PEI) and 1,3,6,8-Tetrabromopyrene (TBP). The surface area and pore volume were about up to 63.2 m2/g and 0.41 m3/g. The prepared COFs maintained the TBP fluorescent performance in water solutions at 440-460 nm. Furthermore, Cu(II) ion solution would impact the quenching activity with F-COF-PT3, and NaOH treated F-COF-PT3 has the 5.6 m2/g capacity of uptake CO2. Finally, the zeta potential and particle diameter of original and treated F-COF-PT3s …

Modeling The Ambient Conditions Of A Manufacturing Environment Using Computational Fluid Dynamics (Cfd), Yang Liu

USF Tampa Graduate Theses and Dissertations

As manufacturing equipment evolve to higher speed and require high precision operations, the impact of environmental changes on machine accuracy becomes critical. Due to thermal expansion, the structure of the machine can change when ambient temperature varies. When the airflow in the laboratory changes, this also alters the operator's thermal comfort. Either the change in machine structure or operator comfort can ultimately affect machine accuracy. The manufacturing industry is currently using heating, ventilation, and air-conditioning (HVAC) systems to regulate the temperature of the working environment. However, since conventional HVAC systems determine whether to activate the HVAC system by collecting the …

Residential Curbside Recycle Context Analysis, Ntchanang Mpafe

USF Tampa Graduate Theses and Dissertations

Curbside recycling as a preferred mode of residential and municipal sustainability goals seems to have an overwhelming acceptance and adoption in the US. About 69.8 million out of 97.3 million (72%) single-family households in the United States have access to curbside recycling services (State of Curbside Recycling Report, 2020). Collectively, the programs divert about nine million tons of recyclables from landfill disposal each year (Cottom, 2019).

For a design that started in the 1980s in the US, its rapid universal adoption seems to have precluded a concerted effort in examining the coproduced nature (Households: service receptors and Municipalities: service providers) …

Teachers' Perspectives Of Implementing Restorative Justice, Antonio G. Smith

USF Tampa Graduate Theses and Dissertations

The use of restorative justice in the school system is an emerging philosophy for handling student discipline that seeks alternative methods for solving problematic behavior than traditional or retributive approaches that are detrimental to the education and well-being of students. Student discipline is a controversial topic in education circles, resulting in many school districts looking to implement restorative practice program initiatives. Responses that are restorative, largely decrease the chances of recidivism. Zero-tolerance policies that were originally enforced to keep schools safe, have proven to not have the desired effect as intended, most arguably making schools less safe. There is a …

Experiences Of Saudi Arabian Mothers Of Young Children With Disabilities: An Exploratory Study, Samirah Bahkali

USF Tampa Graduate Theses and Dissertations

Saudi Arabia is one of the countries that seeks to provide and develop services for children with disabilities and their families. As times have progressed, regulations and laws have placed an emphasis on providing suitable and better services for children with disabilities and their families. However, a gap exists in the literature regarding the overall experiences of Saudi Arabian mothers of children with disabilities in the early childhood years from birth to age ten (Al Otaibi & Al Sartawi, 2009; Alazemi, 2010). This study explored the experiences of Saudi Arabian mothers of children with disabilities. A qualitative interview approach, utilizing …

Informing Complexity: The Business Case For Managing Digital Twins Of Complex Process Facilities As A Valuable Asset, William Randell Mcnair

USF Tampa Graduate Theses and Dissertations

The Digital Twins of complex facilities, specifically 3D models created during their design, is a potentially valuable information asset. This three- article dissertation explores the business case for firms in the petrochemical process industry to manage throughout the facility lifecycle. A maturity model is provided to illustrate the stages of digital twin evolution and serves as a tool to help communicate each of the five levels of digital twin maturity achievable in various use cases. An industry analysis reviews existing literature and proposes a model to assess informing or insight value of digital twins from three perspectives. Next, an empirical …

Synthesis Of A Multimodal Ecological Model For Scalable, High-Resolution Arboviral Risk Prediction In Florida, Sean P. Beeman

USF Tampa Graduate Theses and Dissertations

West Nile virus (WNV) and Eastern Equine Encephalitis virus (EEEV) represent the two greatest endemic arboviral risks to the state of Florida. Currently, no approved human vaccine exists for the prevention of either virus. In the absence of a vaccine, effective disease surveillance is paramount for public health. In Florida, WNV and EEEV sentinel chicken surveillance is conducted by mosquito control programs operated at the county, municipality, or special taxing district level. This program was implemented in 1978 following human outbreaks of St. Louis Encephalitis virus (SLEV) that occurred between 1959 and 1977, with initial sentinel coops placed in proximity …

Using Hyper-Dimensional Spanning Trees To Improve Structure Preservation During Dimensionality Reduction, Curtis Thomas Davis

USF Tampa Graduate Theses and Dissertations

Understanding relations in hyper-dimensional data is a prevalent problem, which is often approached by using dimensionality reduction. The structure preserved from the original data is often dependent on the type of dimension reduction algorithm used, and it can produce results that vary substantially from one another. Visualizing hyper-dimensional data helps to understand the data, but it presents a problem, as our visualizations rely upon two or three-dimensional displays. Current dimension reduction methods, used to reduce hyper-dimensional data to low-dimensional data, often produce results that fail to preserve the structure as the complexity of the data increases. This reduction in dimension …

Constructing Frameworks For Task-Optimized Visualizations, Ghulam Jilani Abdul Rahim Quadri

USF Tampa Graduate Theses and Dissertations

Visualization is crucial in today’s data-driven world to augment and enhance human understanding and decision-making. Effective visualizations must support accuracy in visual task performance and expressive data communication. Effective visualization design depends on the visual channels used, chart types, or visual tasks. However, design choices and visual judgment are co-related, and effectiveness is not one-dimensional, leading to a significant need to understand the intersection of these factors to create optimized visualizations. Hence, constructing frameworks that consider both design decisions and the task being performed enables optimizing visualization design to maximize efficacy. This dissertation describes experiments, techniques, and user studies to …

The Development Of Bioactive Peptidomimetics Based On Γ-Aapeptides, Minghui Wang

USF Tampa Graduate Theses and Dissertations

Peptidomimetics are small protein like chains which can mimic primary, secondary or eventertiary structures of peptides. They have been attracting more and more attention because of their special advantages, such as high tolerance to proteolytic degradation and thousands of chemical diversities. γ-AApeptides were developed by our group as a kind of peptidomimetics that represent γ-substituted-N-acylated-N-aminoethyl amino acids. Many biological functions of γ-AApeptides have already been discovered. To expand the potential application of γ-AApeptides, I designed and synthesized three series of antimicrobial derivatives with broad-spectrum of antibacterial activity. A one-bead-two-compound thioether bridged macrocyclic γ-AApeptides library was built and screened against NRF2 …

Barriers And Motivating Factors To Parent Involvement In The Well-Being Promotion Program, Alexis C. Elvy

USF Tampa Graduate Theses and Dissertations

The Well-Being Promotion Program (WBPP) is a school-based positive psychology intervention implemented in both primary and secondary schools to increase subjective well-being in children and adolescents. Through the inclusion of a parent information session and weekly parent contacts, parents of students enrolled in the program are encouraged to enhance their child’s generalization of positive activities and relationship building skills. However, previous implementation of the WBPP provides evidence for the existence of barriers to parental involvement in the intervention. Although the literature on parental involvement in school-based positive psychology interventions is sparse, research conducted with a variety of school-based and clinical …

Who To Choose? Rating Broker Best Practices In The Medicare Advantage Industry, Darwin R. Hale

USF Tampa Graduate Theses and Dissertations

The purpose of this study is to help navigate the U.S. Healthcare system in a way that maximizes value and minimizes risk to Medicare Beneficiaries. We do this through the creation of a tool that will aid in the selection of an independent health broker. Brokers are the trusted resource who have the responsibility and expertise to optimize client value through needs analysis, education, and expectations setting. Beneficiaries need help with life impacting health and wellness decisions and ongoing support across the continuum of care. The qualitative research included interviews of industry experts with combined Medicare experience of more than …

Employees Breaking Bad With Technology: An Exploratory Analysis Of Human Factors That Drive Cyberspace Insider Threats, Marcus L. Green

USF Tampa Graduate Theses and Dissertations

As implementation of computer systems has continued to grow in business contexts, employee-driven cyberspace infractions have also grown in number. Employee cyberspace behaviors have continued to have detrimental effects on company computer systems. Actions that violate company cybersecurity policies can be either malicious or unmalicious. Solutions, by and large, have been electronic and centered on hardware and software. Those proposing solutions have begun to shift their focus to human risk vulnerabilities.

This study was novel in that its focus was identification of individual, cultural, and technological risk factors that drive cyberspace insider threat activities. Identifying factors that reduce insider threat …

Development Of Carbon And Silicon Carbide Based Microelectrode Implantable Neural Interfaces, Chenyin Feng

USF Tampa Graduate Theses and Dissertations

The use of neural modulation techniques to treat nervous system disorders, as well as neural recording to study brain function, continues to be of intense interest around the world. Due to the need to treat diseases such as Parkinson’s, dementia, depression and return normal function to patients suffering from nervous system damage and trauma, neural implants continue to be developed globally. One of these devices, the microelectrode implantable neural interface (mINI), has been rapidly developed, thanks to advanced semiconductor fabrication processes. However, the long-term reliability of present-day devices has still to be demonstrated and is delaying the application of this …

Retaining And Supporting Graduate Racially Minoritized Students: A Critical Analysis, Patricia Y. Gills

USF Tampa Graduate Theses and Dissertations

This study aimed to critique the racial status quo of a school psychology graduate training program by gaining the perspectives of former and current racially minoritized students from the program. Additionally, this study aimed to utilize this information to provide implications for how to dismantle the racist and oppressive structures within the school psychology program. This study also aimed to analyze the success of research recommendations in helping racially minoritized students defeat the systemic barriers to completing a school psychology program. I conducted one-hour, semi-structured interviews of eight school psychology graduate racially minoritized students from the school psychology program. I …

Strengthening The Entrepreneurial Support Community, Andrew J. Hafer

USF Tampa Graduate Theses and Dissertations

This study seeks to discover ways of improving the impact and effectiveness of entrepreneurial support organizations (ESOs) in the regional entrepreneurial ecosystem of Tampa Bay, Florida. First, the study establishes a comprehensive catalog (called the “Superset”) of potential support programs that might be offered by ESOs and consumed by entrepreneurs. Through empirical data collection, the programs in the Superset are ranked by entrepreneurs and ESO leaders according to their opinion of perceived value and importance for gaining the competency in said program. The rankings allow a mapping of the regional ecosystem to identify gaps, inefficiencies, and improvement opportunities.

The study …

Public Budgeting As Moral Dilemma, Ben Wroblewski

USF Tampa Graduate Theses and Dissertations

Government budget managers are responsible for the proper stewardship of public funds and facilitating the business transactions necessary to meet the public’s needs. Sometimes, during these decisions, managers can experience pressure to make an unethical decision. A better understanding of this issue can help organizations prevent misallocation of funds and adverse effects within the community. The problem is that the general pressure model lacks a framework to explain the decision-making process. Moral utility theory can provide insight into how people weigh or score choices with ethical considerations. This study found that government budget managers included their self-interests when experiencing tension …

Managing Health Locus Of Control In Patient-Provider Relationships, James Wallace

USF Tampa Graduate Theses and Dissertations

Patient locus of control is a strong determinant of health outcomes, yet health care professionals do not typically address it in care plans. In fact, management of most medical conditions is hindered because the treating physician has little information about the patient’s locus of control. This research addresses the question “How can locus of control be used to enable health care practitioners to improve medical outcomes?”

Research Methodology. Using an engaged scholarship approach incorporating the Elaborated Action Design Research methodology, the research drives the guided, emergent design of a novel protocol and two separate artifacts for management of health locus …

External And Internal Factors Of Sports Sponsorship Selling Cycles In North American Professional Sports, Dan Kaufmann

USF Tampa Graduate Theses and Dissertations

In sports sponsorship, sellers and management seek to shorten their sales cycles to renew, upsell, and close new business. This research covers what professional sports organizations can do to help shorten the sales process. The study includes an industry analysis, literature review, and a mixed method survey of 212 people within the North American Sports Sponsorship Industry. The surveyed individuals are C-suite sponsorship salespeople and managers. These individuals work in the following professional sports leagues in North America: The National Football League (NFL), National Basketball League (NBA), National Hockey League (NHL), Major League Baseball (MLB), and Major League Soccer (MLS). …

Asking The Experts: Perception Of The Relative Importance Of Antecedents Of Optimal Financial Behavior, Chad M. Jones

USF Tampa Graduate Theses and Dissertations

Although there is ample research on financial behavior, the inclusion of financial planners in the sample frames of such research is rare. This study used certified financial planners (CFPs) as the sole sample population to identify antecedents of optimal financial behavior and their relative importance. Data from a nationally representative sample of 167 CFPs indicated that (a) financial literacy lost relative importance as CFP tenure increased, (b) romantic partnership closely rivaled financial literacy in importance, (c) financial literacy was more weakly correlated with romantic partnership than with the other antecedents investigated, and (d) romantic partnership was universally accepted as a …

Comprehensive Leadership Development: Principal Characteristics, Experience And Performance, Gregory Basham

USF Tampa Graduate Theses and Dissertations

The significance of the principal’s role in creating a generative learning environment to influence student achievement is well documented in research (Davis et al., 2017; Hitt & Tucker, 2016; Leithwood, 2012; Leithwood, & Jantzi, 2008; Sebastian et al., 2017). This research has led to the creation of frameworks for developing leaders and constructs identifying effective leadership practices (Leithwood, 2012; Murphy et al., 2006; Sebring et al., 2006), but very little research has been done to investigate the relationship between prior roles and principal performance. Research designed to focus on the professional background of effective principals, the relationship of how prior …

Human-Centered Cybersecurity Research — Anthropological Findings From Two Longitudinal Studies, Anwesh Tuladhar

USF Tampa Graduate Theses and Dissertations

Cybersecurity is a pressing issue. Researchers have proposed numerous security solutions over the years in order to combat security issues but it is still common to find known, well understood security issues in production environments. In this thesis, I seek to find the underlying reasons to why existing security solutions and best practices are not consistently applied and how to improve the utilization of secure best practices. To this end, I adopt the anthropological research method of long term participant observation and embed myself in real-world settings in order to understand the existence of security issues and the perception of …

The Is Social Continuance Model: Using Conversational Agents To Support Co-Creation, Naif Alawi

USF Tampa Graduate Theses and Dissertations

With the rise of Agentic IS Artifact and the increasing integration of this technology within organizations, our understanding of the impact of this technology on individuals remains limited. Although IS use literature provides important guidance for organization to increase employees’ willingness to work with new technology implementations, the utilitarian view of prior IS use limits its application in light of the new evolving social interaction between humans and Agentic IS Artifacts. To that end, we contribute to the IS use literature by implementing a social view to understand the impact of Agentic IS Artifacts on an individual’s perception and behavior. …

Learning From The Seed: Illuminating Black Girlhood In Sustainable Living Paradigms, Toni Powell Powell Young

USF Tampa Graduate Theses and Dissertations

The contemporary image of sustainable living presents a culturally narrow view of its participants and the manner of engaging in sustainable living paradigms. Through crystallization (Ellingson, 2009) I present a mixed methods approach that emphasizes participant observation, visual, mediated, and discursive analyses, as well as demonstrates the efficacy of Culture Centered Black Feminist Auto/Ethnography. This project seeks to highlight and place within historical context, the ways in which African American girls, who are largely left out of the prevailing image of sustainability, perform and articulate sustainability for themselves, in their homes, and throughout their home communities.

In their everyday lives, …