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Model Of A Sulfur-Based Cyclic Denitrification Filter For Marine Recirculating Aquaculture Systems, Zhang Cheng

USF Tampa Graduate Theses and Dissertations

Recirculating aquaculture systems (RAS) are a type of near zero-discharge fish production system that is used to treat and recirculate aquaculture wastewater and increase the biomass stocking density in the fish tank. The RAS presented in this thesis was a marine system which was operated with two temporally independent cycles, Loop 1, a continuous loop, and Loop 2, an intermittent loop. Flow in the RAS was switched between the two loops by a solenoid valve. During the operation of Loop 1, components involved in the cycle were successively the fish tank for fish production, solids filters for solids removal and …

Estimation Of Number Of People Living In Developing Countries That Received Water From A Spring Source, Prapti Shinde

USF Tampa Graduate Theses and Dissertations

In the year 2000, 170 countries decided to stand together and solve some primary and common global problems like poor health, water, and sanitation. Obtaining access to safe drinking water is every individual’s right. The UN defines safe drinking water as “the water required for each personal or domestic use must be safe, therefore free from micro-organisms, chemical substances and radiological hazards that constitute a threat to a person's health” (UNDESA, 2014). This thesis focuses on identifying the number of people who potentially receive spring water from a piped source in rural mountainous areas. There are three significant steps and …

Comparing Family Sharing Behaviors In Brca Carriers With Palb2 Carriers, Joy E. Kechik

USF Tampa Graduate Theses and Dissertations

Identifying individuals with hereditary cancer predisposition can improve health outcomes for patients and their family members through early cancer detection and prevention strategies. Prior research about family sharing of genetic test results among those with hereditary breast cancer has overwhelmingly been limited to the BRCA1 and BRCA2 genes. The present study sought to compare family sharing behaviors in women with pathogenic BRCA variants to women with pathogenic variants in the more recently identified and characterized PALB2 gene. A total of 18 BRCA carriers and 13 PALB2 carriers were interviewed about family sharing practices using a semi-structured guide based on the …

Removal And Recovery Of Nutrients From Wastewater In Urban And Rural Contexts, Kevin Daniel Orner

USF Tampa Graduate Theses and Dissertations

Efforts to remove and recover nutrients from wastewater are motivated by the United Nations Sustainable Development Goals and the National Academy of Engineering Grand Challenges of Engineering. Of the seventeen Sustainable Development Goals (SDGs), multiple SDGs relate to managing nutrients in wastewater. SDG 6, which is to “ensure availability and sustainable management of water and sanitation for all,” contains targets that aim to improve water quality by reducing pollution, halve the amount of untreated wastewater released to the environment, and increase recycling and safe reuse of wastewater (UN, 2017). SDG 2 seeks to improve food security and SDG 12 seeks …

Development And Application Of Decision-Making Tool For Rural Spring-Sourced Gravity-Fed Community Managed Water Systems, Oswaldo Galicia

USF Tampa Graduate Theses and Dissertations

People all over the world still lack access to safe drinking water service. Those with access experience several issues during the first few years of installation that impede on their overall access. In order to improve water services, not only is a proper decision-making tool necessary, taking into account key factors that impact sustainable water service, but proper monitoring and evaluation is also important in ensuring service for the long term. There are several developed assessment tools used for monitoring and evaluation of water systems post-construction, applicable in various scenarios. However, there are only few tools available to facilitate the …

Integrated Molecular Characterization Of Lung Adenocarcinoma With Implications For Immunotherapy, Nicholas T. Gimbrone

USF Tampa Graduate Theses and Dissertations

This dissertation covers a variety of the genetic and molecular abnormalities of lung adenocarcinoma with an emphasis on STK11 loss and its implications on immunotherapy response. Given that lung cancer is the leading cancer killer, novel therapies are in great demand. In particular, immunotherapy has shown some of the most promise in the last decade but remains limited due to nearly 80% of patients not significantly responding. This dissertation aims to molecularly characterize lung adenocarcinoma while attempting to explain the reason why patients with STK11 loss do not respond to immunotherapy.

In the first chapter we discuss the relationship between …

Understanding Immunometabolic And Suppressive Factors That Impact Cancer Development, Rebecca Swearingen Hesterberg

USF Tampa Graduate Theses and Dissertations

The immune system is responsible for surveillance against pathogens and malignancies and adoptive transfer of antigen-specific T is a powerful new cancer treatment option. There is a clinical need to understand more about the normal regulatory processes that prevent immunosurveillance and how to manipulate this for clinical benefit. This project aims to understand T cells from three different angles. First, the biological role of the negative regulator cereblon (CRBN) was investigated in CD8+ T cells and my studies showed that higher levels of specific derivatives downstream of the amino acid glutamine may be beneficial to T cells in the immune …

“What I Hadn’T Realized Is How Difficult It Is, You Know?”: Examining The Protective Factors And Barriers To Breastfeeding In The Uk, Cheyenne R. Wagi

USF Tampa Graduate Theses and Dissertations

The international recommendation for breastfeeding is that a baby should be exclusively breastfed for six months. Breastfeeding should be continued for up to two years and beyond with complementary foods (WHO, 2016). The United Kingdom exhibits some of the lowest breastfeeding rates in the world (HSCIC, 2012). The percentage of mothers who breastfed in the United Kingdom falls below 34% at six months, with only 1% of mothers breastfeeding exclusively at this point (HSCIC, 2012:31). This study sought to examine the protective factors and barriers for breastfeeding in the UK. Mums (n=28), their partners (n=6), and facilitators at breastfeeding support …

Essays On Cloud Computing Analytics, Vivek Kumar Singh

USF Tampa Graduate Theses and Dissertations

This dissertation research focuses on two key aspects of cloud computing research – pricing and security using data-driven techniques such as deep learning and econometrics. The first dissertation essay (Chapter 1) examines the adoption of spot market in cloud computing and builds IT investment estimation models for organizations adopting cloud spot market. The second dissertation essay (Chapter 2 and 3) studies proactive threat detection and prediction in cloud computing. The final dissertation essay (Chapter 4) develops a secured cloud files system which protects organizations using cloud computing in accidental data leaks.

Ain't I A Woman, Too? Depictions Of Toxic Femininity, Transmisogynoir, And Violence On Star, Sunahtah D. Jones

USF Tampa Graduate Theses and Dissertations

As the rate of the murder of Black trans women at the hands of Black cisgender men rises steadily every year (HRC, 2017), discourses regarding the detrimental impact of toxic masculinity within Black communities continue to increase within different branches of feminist literature. However, the role that Black cisgender women and toxic femininity play in the violent and systematic subjugation of Black trans women is largely ignored in feminist literature. In this thesis, I conduct a cultural analysis of the representations of the Black trans character Cotton Brown (from the Fox show Star) to examine how the show illustrates toxic …

Using Class Pass Intervention (Cpi) To Decrease Disruptive Behavior In Children, Andrea N. Zuniga

USF Tampa Graduate Theses and Dissertations

Finding of previous research has shown that disruptive behavior can impair students’ academic success (Pierce, Reid, & Epstein, 2004), as well as increase teacher’s stress level (Westling, 2010). Class Pass Intervention (CPI) is a Tier 2 intervention designed to decrease disruptive behavior and increase academic engagement, however, thus far research on the effects of CPI has been limited to typically developing elementary and high school students with escape and attention-maintained problem behaviors. Therefore, the purpose of this study was to replicate and extend previous research on the effects of CPI on problem behavior and academic engagement however with students whose …

Making Sense At The Margins: Describing Narratives On Food Insecurity Through Hip-Hop, Lemuel Scott

USF Tampa Graduate Theses and Dissertations

Neoliberalism is the contemporary political and economic thought that promotes ideas of private property, individualism, and market logic as key to advancing humanity. Scholars generally link neoliberalism to poverty from a broad perspective, but few have explored how it specifically impacts food insecurity. Globally, many people impacted by poverty also experience food insecurity. Hip-hop is important to resistance and fostering my critical worldview. Existing literature primarily describes hip-hop as a critical tool giving expression to people living at the margins. However, there is a need for hip-hop to be used more often as resistance by artists doing research. First, this …

Essays On Health, Healthcare, Job Insecurity And Health Outcomes, Ichiro Nakamoto

USF Tampa Graduate Theses and Dissertations

This doctoral dissertation proposal is comprised of three separate chapters, all of which uses the nationally representative uniform survey Health and Retirement Survey (HRS) to examine the relationship between health, insurance, health care and health outcomes. Below, the brief introduction for each section is provided:

 Chapter I: Medicare Part D and Patients' Well-being

 Chapter II: Parent's Health Insurance and Informal Care

 Chapter III: Job Insecurity and Health (with Dr. Ayyagari)

In chapter I, I explore how Medicare Part D (MD) affects the well-being of the severely sick patients both in the short- and in the long- term. …

How Mentors At Starting Right Now Build Relationships With Homeless Youth: A Qualitative Analysis, Sheena Hera

USF Tampa Graduate Theses and Dissertations

Although research has described mentoring programs to have positive effects with youth, there are few studies that describe how mentors build relationships with homeless youth. In this study, I sought to explore how mentors of a community-based organization, Starting Right Now, built relationships with homeless youth. Starting Right Now is a multi-faceted, community-based intervention developed in 2009 in Tampa, FL. They provide services to homeless adolescents who are no longer living in the custody of a parent or guardian. The program provides residential, educational, recreational, and professional development services, as well as mental and physical health care. Additionally each youth …

“Right In The Trenches With Them”: Caregiving, Advocacy, And The Political Economy Of Community Health Workers, Ryan I. Logan

USF Tampa Graduate Theses and Dissertations

While the concept of the community health worker (CHW) has existed since the mid-20th century, their function as a legitimate branch of the broader workforce in the United States has been tenuous. Their unique roles have the potential to reduce health disparities within marginalized communities, but stakeholder development of this position risks diminishing the crucial skills of these workers. Anthropological research on these workers has typically assessed them in the developing world, while public health research has focused primarily on their ability to impact specific health outcomes through quantitative studies. As a result of the limited and predominantly quantitative assessments …

Evaluation Of Novel Hemocompatible Surface Coatings For Extracorporeal Life Support: A Biocompatible Alternative To Systemic Anticoagulation, Teryn Rose Roberts

USF Tampa Graduate Theses and Dissertations

Extracorporeal life support (ECLS) is a class of technologies used to support or replace the function of failing organs. During ECLS, blood is withdrawn from systemic circulation and circulated through an artificial organ or “treatment membrane” that performs the function of the failing organ, prior to return to systemic circulation. While ECLS provides life-saving therapy to wide patient populations from pre-term infants to combat-wounded soldiers, this therapy is limited due to secondary thrombotic and bleeding complications that result from: 1) exposure of blood to the foreign surfaces in the device circuit and 2) administration of anticoagulant drugs to prevent clot …

A Family Histories Study Of Parents Engaging Issues Of Race And Racism, Omar J. Salaam

USF Tampa Graduate Theses and Dissertations

This family histories research study uses life history methods to explore narratives of parents’ lives regarding ways in which they socialize their children and engage school staff around issues of race and racism. The information gathered is from interviews with the two primary participants, two focus groups; one with each primary participant and the adults with whom they are raising their elementary school (Pre-K to Grade-5) children, and follow-up interviews with both primary participants. The first finding in this study is that the family life stories in both families play a direct role in socializing their children, in that the …

Online Mmorpg Games In China: Player Motivations And The Mediating Role Of Flow, Jiaxin Liu

USF Tampa Graduate Theses and Dissertations

Massively Multiplayer Online Role-Playing Games (MMORPGs) are gaining popularity and are being used widely in China. The aim of this study is to explore the relationship between the motivation and the experience of MMORPG players, and the effects of playing MMORPG through an extensive online survey of more than 300 Chinese participants (n = 305). Specifically, the findings support the complex relationship between variables, including the direct effects on motivation and flow, on the time the players invest in MMORPG games, and the mediated effects on motivations through flow. In addition to the importance of direct and indirect effects on …

Why Does Coaching Work? An Examination Of Inputs And Process Variables In An Employee Coaching Program, Sarah E. Frick

USF Tampa Graduate Theses and Dissertations

The efficacy of leadership coaching to improve leader and organizational outcomes cannot be overstated. However, a thorough understanding of some of the inputs and process variables involved in coaching has not been empirically established to date. To address this issue in the leader development and coaching literature, I examined the characteristics of the coaches and the coachees and their relationships with two relational variables potentially involved in coaching relationships (i.e., leader-member exchange and trust). The importance of leadership to work outcomes and leader development is highlighted, followed by a discussion of the specific leader development technique of coaching. The discussion …

An Emergent Theory Of Executive Leadership Selection: Leveraging Grounded Theory To Study The U.S. Military's Special Forces Assessment And Selection Process, Darryl J. Lavender

USF Tampa Graduate Theses and Dissertations

This research documents the assessment and selection process used by the U.S. Military’s Special Forces for over 70 years using Grounded Theory Methodology. Three independent studies were used to document the Special Forces process of selection. Through comparative reanalysis of each study’s data a model emerged explaining the Special Forces phenomena of assessment and selection.

Analysis was conducted in three phases using open, axial, and selective coding which allowed for the identification of a smaller set of themes which categorized the process of selection. The final step involved the development of two analytical matrices explaining the central theme of selection …

Online And Self-Directed Learningreadiness Among Hospitality And Tourism College Students And Industry Professionals, Muhittin Cavusoglu

USF Tampa Graduate Theses and Dissertations

The purpose of this quantitative study was to compare self-directed learning readiness and online learning readiness between hospitality and tourism college students and industry professionals. The Self-Directed Learning Readiness Scale (SDLRS) was used for measuring self-directed learning readiness. After examining the reliability and validity indices of the modified Online Learning Readiness Scale (OLRS), it was used in the context of hospitality and tourism for the measurement of online learning and training readiness. Two different study populations, hospitality and tourism college students and hospitality and tourism industry professionals, were identified for the purpose of this study. Data were obtained via online …

Low Temperature Multi Effects Desalination-Mechanical Vapor Compression Powered By Supercritical Organic Rankine Cycle, Eydhah Almatrafi

USF Tampa Graduate Theses and Dissertations

Utilizing low grade heat sources such as geothermal, solar or waste heat has received a high attention in recent years. A lot of research has discussed using Organic Rankine Cycle (ORC) as subcritical or supercritical in power generation. However, very few studies extend their research in utilizing ORC in other applications such as desalination. For reverse osmosis (RO) desalination, which is considered a membrane technology, the use of supercritical-ORC in low grade heat sources is more favorable than subcritical-ORC. Thus, studies of utilizing either subcritical-ORC or supercritical-ORC for thermal desalination that use power and heat from Rankine cycle are rare …

Essays In Applied Microeconomics, Lijuan Feng

USF Tampa Graduate Theses and Dissertations

Chapter 1 studies the effect of body weight on labor market outcomes. Using longitudinal data from the China Health and Nutrition Survey (CHNS) from 1989 to 2011, and both instrumental variable and fixed effects estimation to control for the endogeneity of body weight, I examine the wage effect of BMI by gender, type of residence area, and occupation. Results from linear OLS regression show a positive relationship between body weight and income for males in both rural and urban areas and females in rural areas, while a negative one for females in urban areas. After controlling for the unobserved individual …

Discrimination, Victimization, And Suicidality In The Lgbtq Population: The Role Of Psychological Pain And Perceived Connectedness, Amanda L. Peterson

USF Tampa Graduate Theses and Dissertations

Individuals who identify as lesbian, gay, bisexual, transgender, or queer (LGBTQ) are at a higher risk for suicide compared to the general population, but little is known about why this is. Many LGBTQ individuals face some form of discrimination or victimization in their lifetime, and some evidence suggests these experiences may contribute to this group’s higher suicide risk. Unfortunately, research has only examined the impact of direct discrimination/victimization on suicidality and has neglected to examine how ambient discrimination/victimization relates to suicidality. Additionally, although some links exist between discrimination, victimization, and suicide, the mechanisms by which these are related are unknown. …

‘If He Hits Me, Is That Love? I Don’T Think So’: An Ethnographic Investigation Of The Multi-Level Influences Shaping Indigenous Women’S Decision-Making Around Intimate Partner Violence In The Rural Peruvian Andes, Isabella Li Chan

USF Tampa Graduate Theses and Dissertations

This dissertation examines how the intersections of gender, ethnicity, place, and class shape indigenous women’s risks for and experiences of intimate partner violence and related decision-making in Carhuaz province, an underserved, resource-poor setting in the Peruvian Andes. This dissertation applied a mixed-methods, community-based approach to 11 months of ethnographic fieldwork in Peru, which included 82 face-to-face surveys using the World Health Organization’s Multi-Country Study Instrument, 38 semi-structured interviews with survivors, community members, and IPV-related service providers, and 6 participatory action research workshops (n=64).

Through this dissertation, the voices of indigenous women struggling with intimate partner violence illuminate the lived realities …

The Role Of The Soldier In Civilian Life: Personal And Social Concerns That Influence Reintegration Processes, Matthew J. Ahlfs

USF Tampa Graduate Theses and Dissertations

The intent and direction of this thesis is to recognize personal and social concerns that influence soldiers’ reintegration process. The missing element in current literature is capturing the soldiers’ lived experiences, ideas, perspective and knowledge of what it truly means to be a soldier and having to reintegrate back into the civilian life after being submerged the military culture for an extended period of time. One of the vital concerns to the soldiers is how civilians, specifically the community, politicians, scholars and mental health providers, are not necessary fully aware nor do they recognize the influential impacts of the experiences …

High Expectations And Teacher Implicit Biases In A Culture Of Care, Jacqueline K. Haynes

USF Tampa Graduate Theses and Dissertations

This graduate project was part of a group project completed by five school and district administrators in Hillsborough County, Florida. The project began because of our passion for teachers who are able to establish a culture of care in their classrooms that support students academically but transform their learning through experiences that enable them to be more highly engaged and productive students, regardless of ethnicity, socioeconomic status, perceived academic abilities, and backgrounds.

My project component looked at research on teacher expectations and their effects on student success. Why does the color of a child's skin tone trigger lower expectations by …

Mechanisms Of S1p-Induced Endothelial Barrier Enhancement, Natascha Guimarães Alves

USF Tampa Graduate Theses and Dissertations

Excessive microvascular permeability is a serious complication involved in traumatic injury and inflammatory diseases. Alcohol intoxication can exacerbate the physiological derangements produced by microvascular endothelial barrier dysfunction in such disease conditions. Sphingosine-1-phosphate (S1P) has known endothelial barrier-protective properties, and has been shown to ameliorate microvascular leakage in a model of combined alcohol intoxication and hemorrhagic shock and resuscitation (HSR). However, whether the barrier-protective properties of S1P extend to endothelial cells of the blood-brain barrier (BBB) is unclear. The mechanisms of S1P-induced barrier protection during alcohol intoxication or HSR are also unknown. In the current study, we tested the hypothesis that …

High-Precision Lead Isotope Analysis On Modern Populations To Determine Geolocation Reliability, Gennifer M. Goad

USF Tampa Graduate Theses and Dissertations

Forensic anthropologists increasingly use chemical isotope analysis in the investigation of unidentified human remains, as biochemical georeferencing continually improves with the development of modern reference data of known origins. Isotope variations in trace elements such as strontium (Sr) and lead (Pb) in human teeth are some of the most useful indicators of past domicile in archaeological research and thus have high potential for modern, forensic applications. In this study, high-precision lead isotope analysis was conducted on 63 modern human teeth, which were previously analyzed for strontium isotopes. The results present new lead isotope data for the following countries: United States …

The Effect Of Depression, Inflammation And Sleep Quality On Risk For Cardiovascular Disease, Catherine L. O'Neil

USF Tampa Graduate Theses and Dissertations

Background

Cardiovascular disease (CVD) remains the number one killer even after years of advances and preventative measures. Identifying and reducing modifiable risk factors is a health care priority. CVD Risk assessments are calculated using several traditional risk factors including age, gender, race, blood pressure, cholesterol, history of diabetes, and smoking to estimate a persons’ risk of developing CVD (heart disease or stroke) in the next 10-years. In addition to the traditional risk factors for CVD, there is increasing evidence of metabolic disorders, depressive symptoms, inflammation and sleep quality posing a greater risk for CVD. However, these factors are not included …