Digital Commons Network^™

Motivation To Volunteer, Lendi N. Joy

USF Tampa Graduate Theses and Dissertations

The rate of volunteering in the U.S. remains low in spite of the many positive benefits that volunteering yields. Prior research has suggested various theories to help explain motivation to volunteer. Nonetheless, none of the theories have been both comprehensive and specific enough to allow for their practical application in recruitment efforts or campaigns to increase motivations to volunteer. The purpose of the current study was to test a comprehensive model of volunteer motivation by integrating the Volunteering Functions Inventory into the Theory of Planned Behavior as behavioral and normative beliefs that influence attitudes and subjective norms. The hypothesized model …

Latino/A Student Success In Higher Education: A Study In Persistence, Ronald K. Maccammon

USF Tampa Graduate Theses and Dissertations

The purpose of this qualitative study was to provide a detailed accounting of the experiences of Latinos students who persist in higher education. The supports and barriers they encountered, as well as their recommendations for educational stakeholders looking to effect persistence were examined. The grand tour question guiding this research was: “What do some Latino students and their institutions do to enable decisions to persist and how do they do it?” Sub-Questions providing depth for the research were: (a) how do the participants make meaning of their experiences to persist to graduate; (b) what are the participants’ perceptions of the …

Analysis Of Computational Modeling Methods As Applied To Single-Crystal Organohalide Perovskites, Jon M. Bebeau

USF Tampa Graduate Theses and Dissertations

Perovskite, specifically MAPbI3, has exploded onto the electronic material forefront, with applications from photovoltaic to optical sensors. Still, there remain many unanswered questions about the electronic, structural and mechanical processes and properties of this perovskite. Computational software exists to model the electronic structure and material properties, to the nano scale, using density-functional theory. The goal of these models it to parallel the physical science of the substance in a computer simulation based on emerging mathematical models of the quantum mechanical behavior. In this study I review the historical use of perovskites in electronics, review the evolution of DFT algorithm developments …

Diagnosis Of Freeway Bottlenecks During The Mass Evacuation For Hurricane Irma On Florida's Turnpike Mainline, Brian Michael Staes

USF Tampa Graduate Theses and Dissertations

Prevailing traffic conditions were examined for a bottleneck that occurred on northbound SR-91 (Florida’s Mainline Turnpike) during the mass evacuation for Hurricane Irma in September 2017. Radar detector count, occupancy, and speed data polling at 1-minute intervals were collected from the Regional Integrated Transportation Information System (RITIS) and employed to identify the distinct periods one particular bottleneck was active at a service plaza along SR-91. With this rich data, three distinct periods were identified in which the bottleneck was active at a service plaza off-ramp, lasting a total of 27.5 hours during this colossal evacuation. To identify the activation time …

A Review Of American College Campus Tobacco Or Smoke Free Policies: A Case Study Of A Large Urban University, Sarah E. Powell

USF Tampa Graduate Theses and Dissertations

Objective: A year after a tobacco free policy was passed, the University of South Florida (USF) was interested in the overall policy opinions and efficacy. To assess this a project was completed that included a survey and geospatial data. The survey measured tobacco policy enforcement behavior and a geographic information system (GIS) mapped tobacco policy violation. This project introduces an evaluation process that can efficiently assess an institutions tobacco-free policy. Methods: Using a cross-sectional survey sent to students, faculty, and staff, understanding of policy and resources, tobacco use observations, stage of change regarding policy enforcement, self-efficacy to enforce, and perceived …

An Inferential Study Of The Potential Consumer Value Of Free Charging For Users Of Public Electric Vehicle Charging Infrastructure, Divyamitra Mishra

USF Tampa Graduate Theses and Dissertations

Although there is economic and marketing evidence of consumers assigning additional benefits to free products and bundles, there is limited research into the behavioral consequences of offering public electric vehicle charging for free. Previous exploratory research by Maness and Lin analyzed possible economic and environmental benefits from offering free public charging infrastructure and policy. Their work found that providing free public charging infrastructure could increase plug-in electric vehicle sales and cause decreased reliance on fossil fuels in the personal transportation sector. However, their study assumed the increased value which consumers would place on free charge events. This project proposes to …

A Sustainability Machine: The Incineration-Based Waste Regime In Tampa, Fl, Usa, Kevin P. Martyn

USF Tampa Graduate Theses and Dissertations

Recent history has seen some significant changes in terms of how society thinks about and deals with its wastes. Increasingly troubling indications of the immediacy of ecological concerns, now often described by the Anthropocene concept, have been provocative of a reinvigorated fervor for a sustainability transition. As a result, sustainability has become well-established as both an urgent pursuit and an eminently pliable buzzword. This research describes and explains one key aspect of society’s pursuit of some version of sustainability: our relationship with waste.

The site of this research is Tampa, Florida, a sunbelt city with a unique waste management system. …

Current And Projected Sustainability Of The Water-Energy-Food Nexus In Caribbean Small Island Developing States, Zachary S. Winters

USF Tampa Graduate Theses and Dissertations

Within Latin American and the Caribbean (LAC), small island developing states (SIDS) of the latter are wholly reliant on their natural environments for their tourism-dependent economies yet are experiencing declining environmental health. These effects are exacerbated by Caribbean susceptibility to climate change and growing populations. With limited size, elevation, GDP, and water resources compared to Latin America, the subregion requires management and solutions tailored to the needs of each country. This study examined current and future sustainability of the Caribbean SIDS by assessing the nexus of water-energy-food (WEF) resources at the national level. In addition, the potential for nature-based solutions …

Protease Resistant Growth Factor Formulations For The Healing Of Chronic Wounds, Tabitha Boeringer

USF Tampa Graduate Theses and Dissertations

Chronic wounds are those wounds which are refractory to treatment, often taking years to heal. These wounds are complex and may present with elevated protease levels, resulting in rapid degradation of growth factors, both native and augmented via treatment. This study’s focus was the development of a system to protect growth factors from protease mediated degradation.

The protective system consisted of chimeric fusion proteins developed to contain both a growth factor or known protease inhibitory peptide and an Elastin-Like-Peptide (ELP)component. The unique phase transitioning abilities of the ELP component allowed for the self-assembly of these chimeric fusion proteins into a …

A Multi-City Investigation Of The Effect Of Holidays On Bikeshare System Ridership, Lori Palaio

USF Tampa Graduate Theses and Dissertations

Bikeshare provides important first-mile last-mile, commuting, circulation, and sightseeing options in many cities. Bikeshare can also be healthy and convenient for users. Throughout the year, holidays occur which change typical bikeshare activity patterns. Existing literature shows mixed results relating to the ridership impacts of holidays, as some research shows that these days may result in higher ridership, while others show no effect. Because of variations in system locations and modeling methods, it is difficult to determine the reasons for these mixed results. To control for these aspects, this project consists of a multi-city study of the effect of holidays on …

Functional Gait Asymmetries Achieved Through Modeling And Understanding The Interaction Of Multiple Gait Modulations, Fatemeh Rasouli

USF Tampa Graduate Theses and Dissertations

Walking is an important determinant of human functionality. Gait disabilities affect millions of people worldwide every year. Investigating the science of walking advances recovery techniques and assistive devices for gait rehabilitation. A functional gait promotes productivity, independence, and quality of life. Human gait, like any other moving mechanism, is a dynamic system. Understanding and analyzing the dynamic aspects of gait improves the recovery methods to fundamentally affect and interact with lower limbs.

This dissertation aims to fill the gaps in mechanical simulations of gait and dynamic analysis of rehabilitation techniques. The solutions consider kinematic, kinetic, and spatiotemporal parameters of gait …

Swimming Of Pelagic Snails: Kinematics And Fluid Dynamics, Ferhat Karakas

USF Tampa Graduate Theses and Dissertations

Pteropods (also known as sea butterflies or sea angels), are holoplanktonic marine snails which swim by flapping a pair of extremely flexible wings. The wings are modified from the molluscan foot and the wing motions are supported by the fluid pressure without any rigid support. Sea angels (gymnosome pteropods) are completely naked; in contrast, sea butterflies (thecosome pteropods) have negatively buoyant aragonite shells which vary in geometry and size among different species. Pteropods are seasonally abundant in the ocean, and an important food source for the other zooplanktons, fishes, and whales. Though studies have been conducted regarding their biology, ecology, …

Work Motivation In Wealth Management: The Role Of Self Determination Theory, Mark J. Mattia

USF Tampa Graduate Theses and Dissertations

In this paper, we use Self Determination Theory (Ryan & Deci, 2000A, Deci & Ryan, 2008) as the underlying theory to help determine the factors that may influence wealth advisors to consider leaving (or being committed) to their positions. Baard et al. (2004) established that Self-determination theory was relevant to motivation in the workplace. This quantitative study utilizes a survey instrument that incorporates many already proven reliable and valid items from Self-determination Theory to better understand the wealth advisor work motivation framework. This topic is important within financial services since positive work motivation has been tied to positive work outcomes …

Students' Perceptions Of Career And Academic Advising In College Learning Communities, Kelly M. Hallas

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to examine if community college students in differing learning communities had different perceptions of their career and academic needs and whether students in different learning communities perceived their career and academic advisor as meeting these needs (i.e. are they satisfied with their advising). In addition, this study examined the variables of gender, ethnicity, and enrollment status and their relation to students’ needs and satisfaction across learning communities.

The Community College that provides the backdrop for the inquiry has recently transitioned to Academic and Career Learning Communities. This institution defines its communities as similar majors …

Covalent Organic Frameworks As An Organic Scaffold For Heterogeneous Catalysis Including C-H Activation, Harsh Vardhan

USF Tampa Graduate Theses and Dissertations

Linking small organic molecules into an extended solid usually afford disordered amorphous polymers. The instigation of order into such a material is of profound interest to induce inherent fine control of the overall structure. Covalent organic frameworks (COFs) are new class of porous crystalline material prepared by connecting organic building blocks via strong covalent bonds. The judicious choice of organic monomers can give rise to highly ordered and predictable frameworks with high crystallinity, surface area, and thermal/chemical stability. The role of connecting linkages such as B─O, C─C, C─N extends the principle of fundamental molecular covalent chemistry to the formation of …

Cultivating Virtue: A Thomistic Perspective On The Relationship Between Moral Motivation And Skill, Ashley Potts

USF Tampa Graduate Theses and Dissertations

Over the past twenty years, virtue ethics has seen a resurgence of interest in understanding how virtues are cultivated. Philosophers are now teaming up with psychologists to better understand how psychological research on skills can inform us about the relevant kinds of skills that aid in cultivating virtue. However, this promising line of research rests on a heavily-debated philosophical foundation. To what extent are the moral virtues like and/or cultivated by certain kinds of skills? One group of scholars, referred to as the “proponents of the moral motivation objection,” argue that the moral virtues are motivational dispositions that skills not …

Detecting Symptoms Of Chronic Obstructive Pulmonary Disease And Congestive Heart Failure Via Cough And Wheezing Sounds Using Smart-Phones And Machine Learning, Anthony Windmon

USF Tampa Graduate Theses and Dissertations

Chronic Obstructive Pulmonary Disease (COPD) and Congestive Heart Failure (CHF) are progressive disorders, and major health concerns among today’s aging population. COPD causes a large mucus buildup in the lungs, leading to chronic cough and difficulty to breathe. CHF causes fluid buildup in the lower lungs due to the failing heart, causing cough and difficulty to breath. People who are clinically diagnosed with COPD or CHF are expected to regularly monitor their symptoms and follow complex medical recommendations in an effort to prevent exacerbation. In this dissertation, we elaborate upon three different machine learning based techniques that we developed for …

Feature Selection Via Random Subsets Of Uncorrelated Features, Long Kim Dang

USF Tampa Graduate Theses and Dissertations

The role of feature selection is crucial in many applications. A few of these include computational biology, image classification and risk management. In biology, gene expression micro array data sets have been used extensively in many areas of research. These data sets typically suffer from an important problem: the ratio between the number of features over the number of examples is very high. This problem mainly affects prediction accuracy because it is best to collect more labeled examples than features. A correlation based random subspace ensemble feature selector (CCC_RSM) was proposed to handle this problem [5]. In this approach, first …

Establishing Topological Data Analysis: A Comparison Of Visualization Techniques, Tanmay J. Kotha

USF Tampa Graduate Theses and Dissertations

When visualizing data, we would like to convey both the data and the uncertainty associated with it. There are many incentives to do this, ranging from hurricane path projection to geographical surveys. Important decision making tasks rely upon humans perceiving a clear picture of the data and having confidence in their decisions. Topological Data Analysis has the potential to visualize the data as features or hierarchies in ways that are familiar to human intuition, and thus could help us convey the variation associated with uncertainty.

In this thesis, we evaluate four visualization techniques: color maps, isocontours, Reeb graphs, and persistence …

Understanding The Complex Ethical Landscape Of Artificial Intelligence Adoptions, Chrissann R. Ruehle

USF Tampa Graduate Theses and Dissertations

Although Artificial Intelligence (AI) has existed since the 1950’s, it has experienced a series of expansions and declines over the years. Currently, AI is on an upward trajectory and has prompted the fourth industrial revolution as many scientists have noted. Some firms have rapidly embraced this technology and experienced growth while others have been slow to adopt. Naturally, this expansion often has societal impacts. The aim of this study is to explore ethical considerations that arise during the adoption of this technology. This research addressed three questions: 1. How do market and regulatory forces reportedly shape Artificial Intelligence adoptions? 2. …

The Impact Of Myeloid-Mediated Co-Stimulation And Immunosuppression On The Anti-Tumor Efficacy Of Adoptive T Cell Therapy, Pasquale Patrick Innamarato

USF Tampa Graduate Theses and Dissertations

Adoptive T cell therapy (ACT) in combination with lymphodepleting chemotherapy is an effective strategy to induce the eradication of tumors, providing long-term regression in cancer patients. However, only a minority of patients that receive ACT with tumor infiltrating lymphocytes (TILs) exhibit durable benefit. Thus, there is an urgent need to define strategies that potentiate anti-tumor activity conducted by adoptively transferred T cells. In these studies, we aimed to identify novel strategies to enhance the therapeutic efficacy of ACT. Accordingly, we describe the disparate roles of myeloid cells in the context of ACT characterized by the augmentation of TIL proliferation in …

Soil Characteristics Associated With Horse Cases Of Eastern Equine Encephalitis Virus In Florida, Fulya Guzelkucuk

USF Tampa Graduate Theses and Dissertations

Eastern Equine Encephalitis virus (EEEV) is a mosquito-borne virus found in Florida that affects humans and horses. Also, EEEV is an agricultural land management issue in Florida, as it causes mortality in large numbers of horses each year and sometimes humans. This study investigates the characteristics of soils associated with horse cases of EEEV in the State of Florida, focusing on differences in soil characteristics between summer and winter cases. This study analyzed a total of 676 EEEV cases during 2005-2018, including 611 summer cases and 65 winter cases. Soil characteristics that were examined include: soil texture, drainage class, hydrology …

Black Lives Matter In Engineering, Too! An Environmental Justice Approach Towards Equitable Decision-Making For Stormwater Management In African American Communities, Maya Elizabeth Carrasquillo

USF Tampa Graduate Theses and Dissertations

The United States and the world have recently been challenged with the disparate effects of COVID-19 and the continual killings of unarmed Black men and women across the nation. A history of anti-black racism has led to systemic structures of inequity that thread throughout institutions and communities across the nation. This environmental engineering research comes at a time when understanding how to effectively engage in, and with Black communities is at the forefront of discourse in academia, utilities and private sector.

In 2018 the Brookings Institute published a report on workforce in the water sector demonstrating the lack of diversity …

Network Function Virtualization In Fog Networks, Nazli Siasi

USF Tampa Graduate Theses and Dissertations

The network function virtualization (NFV) paradigm uses commodity servers to implement ''softwarized" networking capabilities and replace costly, proprietary hardware systems. In particular a wide range of virtual network function (VNF) tasks can be implemented here, including rewalls, load-balancers, encryption engines, address translation devices, domain name servers, even routers and switches. NFV also enables a high-degree of service exibility, allowing operators to interconnect multiple VNFs to build highly-customized service function chain (SFC) sequences for their clients. As a result these related technologies are gaining widespread traction in enterprise and cloud-based settings, offering unprecedented service agility and cost effectiveness. Researchers have also …

Using A Systems Thinking Approach And Health Risk Assessment To Analyze The Food-Energy-Water System Nexus Of Seaweed Farming In Belize, Estenia J. Ortiz Carabantes

USF Tampa Graduate Theses and Dissertations

Certain macroalgae, commonly referred to as seaweed, have traditionally been used as a food source for many coastal communities around the world. In Belize, residents of the Placencia Peninsula cultivate two seaweed types, Eucheuma isiforme and Gracilaria spp. at Little Water Caye located 19 miles offshore. The dried seaweed is sold at the Placencia Producers Cooperative Society Limited (PPCSL) where community members process it into a variety of value-added products such as soaps, cosmetics, hair products, and food additives.

The overall goal of this research was to understand the existing food-energy-water system (FEWS) infrastructure landscape for seaweed production in Placencia, …

Sustainable Nutrient Management Through Technology-Level Evaluation And System-Level Optimization, Xiaofan Xu

USF Tampa Graduate Theses and Dissertations

The need for wastewater and stormwater quality control, especially the control of nutrients, has been recognized due to the widespread problem of water eutrophication. Sustainable nutrient management is essential to reduce nutrient-related impacts and supply the growing nutrient demands.

This research focused on the nutrients (nitrogen and phosphorus) in the urban water environment with nitrogen as the nutrient of interest since nitrogen is the primary nutrient responsible for eutrophication in the coastal areas. It aimed to enhance the sustainability of urban nutrient management through technology-level evaluation and system-level optimization of technology implementation with consideration of life cycle environmental impacts and …

Deep Learning Predictive Modeling With Data Challenges (Small, Big, Or Imbalanced), Renhao Liu

USF Tampa Graduate Theses and Dissertations

In the real world, data used to build machine learning models always has different sizes and characteristics. These size and characteristic features, including small datasets, big datasets, imbalanced datasets, often lead to different challenges when training machine learning models. Models trained on a small number of observations tend to overfit the training data and produce inaccurate results. When it comes to big data, efficiently learning from "huge" size data in a short time becomes important. With an imbalanced dataset, learning is usually biased towards the majority class in the data and appropriate measurements are needed to check model performance.

As …

An Ethnography Of Wash Infrastructures And Governance In Sulphur Springs, Florida, Mathews Jackon Wakhungu

USF Tampa Graduate Theses and Dissertations

This dissertation describes the forces that shape the perceptions and practices in Water, Sanitation, and Hygiene (WaSH) services in the community of Sulphur Springs, Tampa, Florida. It also explores how these forces, perceptions, and practices produce adverse experiences and inequalities in water, sewer, drainage, and laundry services. This ethnographic study combines participant observation, ethnographic interviewing, freelisting, oral history, and GIS to uncover the context, experiences, and perceptions about WaSH in Sulphur Springs. The study finds that the present conditions and perceptions about WaSH are embedded into the historical contexts—especially racial segregation, the construction of the interstate, and multiple economic downturns …

In Post-Extubated Patients What Are The Preferred Methods Of Communication During Their Experience Of Endotracheal Intubation With Mechanical Ventilation, Lanette Dumas

USF Tampa Graduate Theses and Dissertations

To date, communication between mechanically intubated patients and nurses is laden with negative psychological and physiological impacts. Research has focused more on what patients want to communicate, and how nurses communicate with intubated patients. There is limited research identifying the communication methods preferred by these patients. The purpose of this study was to identify communication preferences of mechanically intubated patients using a phenomenological approach.

Semi-structured interviews were conducted with participants in their hospital rooms. The interview questions focused on the period of mechanical intubation when the participants were unable to speak. A total of 27 participants were interviewed at a …

K–12 Teachers’ Experiences “With Or Without” Breastfeeding/Pumping Policy In The School Workplace, Michelle Mae Phillips

USF Tampa Graduate Theses and Dissertations

This study examines the experiences of classroom teachers who are lactating and expressing milk in a situation with or without school/district policies related to lactation and breastmilk expression. As there is little in the published literature that describes postpartum K–12 teachers' experiences while pumping breastmilk in the workplace. There is a need for studies that highlight these experiences and explore how policies impact breastfeeding teachers. The study was guided by three research questions: (1) How do classroom teachers who are, or have been, lactating and expressing milk during their workday experience school/district policies related to lactation and breastmilk expression? (2) …