Digital Commons Network^™

Corrosion Durability Service Life Of Calcium Silicate-Based Reinforced Concrete, Carolina Páez Jiménez

USF Tampa Graduate Theses and Dissertations

Corrosion of reinforcing steel is a major area of study for assessing durability of reinforced concrete infrastructure. Conventional concrete infrastructure designs use ordinary Portland cement (OPC) as the primary cementitious material. However, the world's current challenge to achieve sustainable development requires the cement industry to reduce its environmental impact, as it is responsible for 8% of the anthropogenic CO2 emissions. Hence, a new type of cement has been developed. This novel calcium silicate cement (CSC) reduces the carbon dioxide emissions during its manufacturing process as compared to OPC, providing an environmentally-sound alternative for reinforced concrete fabrication.

Corrosion of steel reinforcement …

Treatment Responses Among Youth With Anxiety Disorders And Body-Focused Repetitive Behaviors In A Clinic Sample, Katrina Scarimbolo

USF Tampa Graduate Theses and Dissertations

Anxiety disorders are considered to encompass multiple conditions, including generalized anxiety disorder, social anxiety disorder, separation anxiety disorder, panic disorder and specific phobias. Related conditions include post-traumatic stress disorder and obsessive and compulsive disorder. Body-focused repetitive behaviors (BFRBs) are a group of disorders that result in repetitive touching, picking, and/or pulling to areas of the body such as the scalp or skin (American Psychiatric Association, 2013). An anxiety disorder and a BFRB commonly co-occur in youth. This comorbid presentation produces further impairment in school attendance, peer socialization, or other functional domains. These difficulties youth experience make it pertinent to study …

The Weekly Challenger, June 24, 2021, The Weekly Challenger, Et Al

Weekly Challenger Newspaper Collection

The June 24, 2021, issue of The Weekly Challenger.

Youth Mental Health First Aid: Educators’ Knowledge, Attitudes, Skills, Aspirations, And Behaviors Change And Differences, Alexis M. Sanchez

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to examine educator outcomes related to Youth Mental Health First Aid (Y-MHFA) professional development training. Educator outcomes in knowledge, attitudes, skills, aspirations, and behaviors (KASAB) were examined to evaluate the preparedness of educators to provide mental health support and the effectiveness of Y-MHFA. Additionally, this study aimed to assess educator outcomes depending on their role in the schools, including school-based educators, school-based mental health staff, and administration/district staff. The author conducted a secondary analysis of pre- and post-test questionnaires of 459 educators in a southeastern state of the United States. A repeated measures ANOVA, …

Recognizing Patterns From Vital Signs Using Spectrograms, Sidharth Srivatsav Sribhashyam

USF Tampa Graduate Theses and Dissertations

Spectrograms extract frequency components from a signal. Spectrograms have beenin use for a long time mainly to analyze frequency components in audio signals. Typically, these audio signals have a very high sampling rate, various frequency components and high frequency variability with time. Vital signs on other hand have very low sampling rate with no frequency variability. This work explores if spectrograms can be used to analyze and recognize patterns from vital signs signals.

As mentioned above, spectrograms deal with frequencies. More the variability of frequency, better the patterns emerge when spectrograms are applied on the signals. As vital signs lack …

The Relationship Of Hope To Goals And Psychological Outcomes In Patients With Advanced Lung Cancer: A Test Of Hope Theory, Kelly A. Hyland

USF Tampa Graduate Theses and Dissertations

Background. Hope is an important positive psychological construct that may help to explain how individuals cope in the context of life-threatening illness. Snyder’s hope theory states that humans are goal-oriented, and that goals link hope to psychological outcomes. The purpose of the current study was to investigate the relationship of hope to emotional well-being, meaning and purpose in life, and positive and negative affect in a sample of patients with advanced stage lung cancer. The study also sought to identify how hope relates to patients’ goals and to explore whether goal characteristics and progress in achieving goals mediated the relationship …

Presenting Selves And Interpreting Culture: An Ethnography Of Chinese International Tourism In The United States, Fangheyue Ma

USF Tampa Graduate Theses and Dissertations

I situate my dissertation research within cultural sociology, specifically the cultural phenomenon of international tourism, and social psychology, particularly the subfields of identity, interaction, and emotion. I conducted a qualitative study of participants in international package tourism and individual travelers, more specifically, Chinese tourists who travel to the United States. Main topics of exploration included tourists’ experience of their trips and package tours, how they interpreted American culture and compared it to their own, how they constructed and performed identities both as tourists and as Chinese nationals, their emotional experiences and how they made sense of an environment that they …

A Constitutive-Based Deep Learning Model For The Identification Of Active Contraction Parameters Of The Left Ventricular Myocardium, Igor Augusto Paschoalotte Nobrega

USF Tampa Graduate Theses and Dissertations

Modern breakthroughs in biomedical engineering, computer science, and data mining have created new opportunities for detecting important mechanical properties of soft tissues that can be employed to identify possible signs of diseases or physiological difficulties. However, the scarcity of different mechanical properties obtained through noninvasive testing emphasizes the importance of incorporating authentic biological data into computer models capable of replicating the behavior of soft tissues.

The field of continuum theory of large deformation hyperactivity permits the formulation of highly descriptive mathematical research and computational models capable of perfectly describing the minute mechanical characteristics of soft materials. By including features about …

A New Age Of Telehealth: Pediatric Speech-Language Pathology Services During The Covid-19 Pandemic And Beyond, Deborah R. Campbell

USF Tampa Graduate Theses and Dissertations

The COVID-19 pandemic potentially changed the landscape of how speech-language pathologists provide services. Prior to March 2020, pediatric speech-language therapy provided via telehealth was limited; however, the COVID-19 pandemic caused a worldwide conversion from in-person care to a remote service delivery model. This conversion brought to the fore possible benefits and utility of telehealth use. Yet, clinicians potentially experienced barriers to its use, including the lack of validity and reliability evidence for remote administration of several pediatric assessments. For the viability of remotely delivered speech-language services to continue and evolve in a post-pandemic world, further research is needed to identify …

Assessing The Feasibility Of Microbially Managed Biological Filtration In U.S. Drinking Water Systems For Removal Of Contaminants Of Emerging Concern, Andrew J. Black

USF Tampa Graduate Theses and Dissertations

The future of water security in the U.S. is clouded by the progression of anthropogenic climate change and the increasing number of households unable to afford access to safe drinking water, while advances in detection and potential health risks of trace organic contaminants are constantly moving the water treatment finish line. There is a need for sustainable, economically feasible technology to provide the means to meet increasingly stringent water quality regulations while also ensuring current standards are met for all communities. Biologically active filtration, combined with an operational approach designed to optimize contaminant removal by the biofilm, may enable water …

Cetacean Maternal Investment: Importance In Conservation Across Species And Drivers For Interspecific Altruism, Christopher Klein

USF Tampa Graduate Theses and Dissertations

Cetacean maternal investments can be useful for conservation management as well as examining behaviors such as interspecific altruism in the humpback whale, Megaptera novaeangliae. Cetaceans are among the most threatened group of marine mammals. In the second chapter, maternal investments across ~90 species/subspecies of Cetacea were analyzed to aid in the understanding of recovery/replacement for conservation and management. Using Principal Components Analysis (PCA), a relative maternal-investment index for 41 cetacean species was built. The maternal-investment index was a composite of four maternal-investment variables, the duration of gestation, lactation, calving intervals, and the number of reproduction years per female per species. …

Improving Environmental Protection: One Imagined Touch At A Time, Luke Ingalls Liska

USF Tampa Graduate Theses and Dissertations

Can imagined touch of flora and fauna (i.e., the plants and animals of the natural world) make you more willing to support environmental protection efforts? Across seven studies, I demonstrate that by asking consumers to imagine touching fauna, marketers can encourage consumers to become more engaged in environmental protection efforts. This effect occurs because imagined touch generates haptic imagery, which enhances a consumer’s emotional attachment to fauna. I demonstrate that emotional attachment to fauna induced via imagined touch enhances individual’s willingness to share Facebook posts, improves their willingness to support increased fines for environment-related offenses, and increases the number of …

Maximum Multiplicative Programming: Theory, Algorithms, And Applications, Payman Ghasemi Saghand

USF Tampa Graduate Theses and Dissertations

This dissertation presents three different contributions to an important class of optimization problems known as Multiplicative Programs (MPs). The first group of contributions contains the development and analysis of several multi-objective optimization-based based algorithms designed to find the optimal solution of Mixed Integer Linear MPs. As for the second group, the application of a special class of MPs in radiotherapy planning is presented. Finally, in the last group, a new technique for conducting the multiplication process in the objectives of MPs is presented. Using this technique, we introduce a family of novel solution methods that are capable of solving both …

Feasibility Of A Virtual Group Nutrition Intervention For Adolescents With Autism Spectrum Disorder, Acadia W. Buro

USF Tampa Graduate Theses and Dissertations

Background: Youth with autism spectrum disorder (ASD) have an increased likelihood of being overweight or developing obesity. As children and adolescents with ASD exhibit problematic eating behaviors and may consume more energy-dense foods and fewer fruits and vegetables than typically developing youth, nutrition represents a modifiable obesity risk factor for adolescents with ASD, yet there is a lack of interventions to improve healthy eating and reduce the risk of obesity in this population.

Purpose: The purpose of this study was to examine the feasibility, acceptability, and preliminary efficacy of a virtual implementation of BALANCE (Bringing Adolescent Learners with Autism Nutrition …

“I Wish Somebody Called Me, Told Me Not To Worry”: Evaluating A Non-Profit’S Use Of Social Support To Address Refugee Women’S Resettlement Challenges, Brandylyn L. Arredondo

USF Tampa Graduate Theses and Dissertations

This report details the qualitative findings from an evaluation of the Refugee and Migrant Women’s Initiative (RAMWI) in Tampa, FL. Founded in 2013, the 501(c)(3) provides cultural knowledge and sewing classes to resettled refugee women. Using primarily semi-structured interviews and participant observation, I place a critical lens on the non-profit to examine how refugee women and volunteers use the provided resources and experience the values (e.g., empowerment, vulnerability) RAMWI centralizes in its programs.

Interviews with refugee women, volunteers, and key informants revealed that the challenges RAMWI faces derive from six key areas of contention: 1) an informal organizational structure; 2) …

Low-Cost Device For Laser Phacoemulsification: A Preliminary Study, Mitchell Harrah

USF Tampa Graduate Theses and Dissertations

The current gold standard of cataract removal surgery is phacoemulsification systems. These are divided based on the type of devices used; both are considered equal but with different delivery modes. These delivery methods are either acoustic or light-based. However, these devices pose two hurdles for impoverished areas: high costs and heavy resource usage. This thesis proposes a novel phacoemulsification system is based on the low-cost, off-shelf laser diodes that implement light-based phacoemulsification of cataracts. The system is tested for viability over two methods: finite element analysis and experimentation on various phantoms. Simulations on the device have occurred on the COMSOL …

Making A Home Away From Home: A Qualitative Study Of African Students’ Practices Of Integration In The United States, Alphonse O. Opoku

USF Tampa Graduate Theses and Dissertations

Over the last two decades, the population of international students in the world has significantly increased. More and more students from diverse backgrounds cross national borders to study. The observed increase in numbers and diversity has led to an uptick in scholarly research that focuses on the adaptation and experiences of international students. Most of these studies, particularly in the US, are informed by the acculturation theories and assimilationist frameworks of the 1900s. Also, an exclusive focus is placed on the host country, with few studies acknowledging the impact of the origin country on the international student experience. Such approaches …

Sleep Hygiene Practices And Subjective Well-Being As Predictors Of High School Students' Obtaining Sufficient Sleep During The School Week, Erin M. Brennan

USF Tampa Graduate Theses and Dissertations

Sleep is critically important to human health. However, the quantity and quality of sleep can vary within and among individuals over time, affecting overall wellness. Adolescence is a critical time for development, both for physical health, as well as health-related behaviors and habits. Physical health is known to be influenced by health-related behaviors such as sleep hygiene, which promotes good sleep. Physical health and engagement in health-related behaviors also are known to influence other aspects of well-being, namely subjective well-being, or happiness. Adolescents are often characterized by their changing sleep needs, patterns, and habits. This study is a secondary analysis …

Data-Informed Decision Support To Improve Pediatric And Maternal Care Quality Under Medicaid Managed Care Settings, Hasan Symum

USF Tampa Graduate Theses and Dissertations

Over the last two decades, the United States has spent almost twice as much per person in healthcare compared to most other wealthy countries. However, this higher spending has not necessarily transformed into improved quality of care; According to World Health Organization reports, the US now ranks 39th for child health and wellbeing and worst in maternal care among developed nations. In terms of proportion of preventable hospital visits, low-risk cesarean sections, and avoidable maternal morbidity/death, the U.S. is among the highest compared with the peer nations. The prevalence of these adverse outcomes in pediatric and obstetric care is particularly …

Green Business And The Culture Of Capitalism: Constructing Narratives Of Environmentalism, Julia S. Jester

USF Tampa Graduate Theses and Dissertations

There are widespread colloquial arguments claiming that any actions taken to combat climate change will be bad for business and the economy, scaring people into continuing their support for the status quo for fear of their financial security. Alternatively, those attempting to combat ecological destruction have subsequently made transitions to sustainable development of products and shifting consumer behavior within this system. There is one core argument that both sides have, albeit in different ways – capitalism and environmentalism are seemingly incompatible; one cannot be successful without the eradication of the other. While it may appear there are only strict binary …

Bayesian Multivariate Joint Modeling For Skewed-Longitudinal And Time-To-Event Data, Lan Xu

USF Tampa Graduate Theses and Dissertations

In epidemiologic and clinical studies, a relatively large number of biomarkers are repeatedly measured in patients over time, often associated with data on epidemiologic and clinical interest events. So, much attention is focused on developing the specific patterns of the longitudinal measurements, and the associations between those patterns and the time to a certain event, such as heart attack, diagnose of disease, time to transplantation, or death. In the last two decades, the research into joint modeling of longitudinal and time-to-event data has received a tremendous amount of attention.

Numerous researchers have proposed joint modeling approaches for a single longitudinal …

Leaf Cutter Ant Nest Soil Cement Stabilized Earthen Bricks: Materials And Methods For Engineering Field Applications, Faith Malay

USF Tampa Graduate Theses and Dissertations

As climate change threatens vulnerable tropical climates and development outpaces resource availability, the need for diverse construction material grows. The United Nations Sustainable Development Goals aim to reduce poverty in all forms. Diversifying construction material works toward reducing indoor air pollution, the eradication of houselessness, encouraging diversification in industry, and supporting small scale industrialization. In the Province of Bocas del Toro in Panama, there is a tenuous connection to the greater industries in the country due to location and existing infrastructure.This research presents a literature review of the historical approaches to the construction and chemistry of cement stabilized earth bricks, …

Saudi Teachers’ Perspectives On Implementing Evidence-Based Practices Specifically Designed For Students With Autism Spectrum Disorder, Ahmad Saad Alghamdi

USF Tampa Graduate Theses and Dissertations

The concept of evidence-based practices (EBP) for students with autism refers to a set of practices that were established based on research evidence that proved their effectiveness in helping improve functional and academic skills for children who have autism (Wong et al., 2015). Vision 2030 is an ambitious plan by the Ministry of Education in the Kingdom of Saudi Arabia (KSA). The ministry has published a new executive framework for the reform of teacher preparation programs (Planning and Development Agency, 2018). This reform is aimed at improving the quality of special educators, through the modernization of teacher preparation programs by …

Reference-Dependent Choice On Digital Platforms, Joshua K. Kaisen

USF Tampa Graduate Theses and Dissertations

Throughout this dissertation I explore a significant departure from the standard model of rationality known as reference-dependence. The theory reference-dependence asserts that an individual’s choice is dependent on their frame of reference established through factors divorced from their rational cost and benefit. This behavior is inefficient as individuals fail to rationally optimize their payoffs. This behavior is understudied in natural settings where isolating specific stimuli which may establish a reference is challenging. However, digital platforms contain limited stimuli which are fully observable to researchers and present an ideal setting to study the theory of reference-dependence. Thus, I introduce three new …

Site Suitability Modeling In The Sand Pine Scrub Of The Ocala National Forest, Jelane M. Wallace

USF Tampa Graduate Theses and Dissertations

Central Florida’s Ocala National Forest is the largest remnant of the unique-to-the-region Sand Pine Scrub ecosystem. This ecosystem exhibits a surprising wealth of biodiversity despite what may be characterized as barren, difficult, dry, pyrogenic conditions. Significant prehistoric sites exist throughout the forest, even in the Sand Pine Scrub; however, most are on the margins and few systematic surveys penetrated this ecosystem, until now. I utilized GIS and these recently collected archaeological survey data, in conjunction with other environmental, geological, or historical data in GIS format, to model prehistoric settlement and land use patterns. This model attempts to address questions of …

A Longitudinal Examination Of Coping And Subjective Well-Being Among High School Students In Accelerated Curricula, Hannah L. Gilfix

USF Tampa Graduate Theses and Dissertations

High school students in accelerated curriculum, which include Advanced Placement (AP) and International Baccalaureate (IB) programs, face greater amounts of academic stress than those in the general education curriculum (Suldo & Shaunessey, 2013). It is crucial to understand how these students cope with their academic demands and the impact that their use of various coping factors has on their overall subjective well-being. This study utilized a longitudinal non-experimental design to a) examine the stability of coping factors, b) examine the relationship between individual coping factors and subjective well-being, c) investigate the impact of socioeconomic status on the relationship of coping …

A Method For Compact Representation Of Heterogenous And Multivariate Time Series For Robust Classification And Visualization, Alla Abdella

USF Tampa Graduate Theses and Dissertations

Processing multivariate sensory time-series with variable lengths is a challenging problem across different application domains due to the naturally complex, high-dimensional, and often non-stationary nature of the data. There are many practical examples of this in the industry particularly for the applications of sensor networks in monitoring production or distribution of goods around the globe. This thesis tackles the specific problem of time-series data representation in how we can better summarize and visualize multi-variate time series data coming from numerous sources in a sensor network distributed across a wide range of application scenarios. On one hand, we think the analysis …

Optimization And Machine Learning Methods For Solving Combinatorial Problems In Urban Transportation, Aigerim Bogyrbayeva

USF Tampa Graduate Theses and Dissertations

This dissertation investigates three applications of emerging technologies for urban trans- portation. In the first chapter, we design a new market for fractional ownership of au- tonomous vehicles (AVs), in which an AV is co-leased by a group of individuals. We present a practical iterative auction based on the combinatorial clock auction to match the interested customers together and determine their payments. In designing such an auction, we con- sider continuous-time items (time slots) which are defined by bidders, and naturally exploit driverless mobility of AVs to form co-leasing groups. To relieve the computational burdens of both bidders and the …

The Role Of Antecedent Music In The Running Routines Of Experienced Runners, Jennifer L. Cook

USF Tampa Graduate Theses and Dissertations

Promoting running as an accessible and cost-effective form of exercise is important because persistent runners have a 29 to 50% lower risk of cardiovascular mortality compared to those who never run (Lee et al., 2014). Although there is a body of research on music and running, the results have been inconclusive across the literature. This may be due to a reliance on self-report measures and the averaging of results employed with group designs. To address these issues, the current study measured performance (pace) as the primary dependent variable in a series of within-subject designs. First, an online cross-sectional survey (Study …

The Early Medieval Transition: Diet Reconstruction, Mobility, And Culture Contact In The Ravenna Countryside, Northern Italy, Anastasia Temkina

USF Tampa Graduate Theses and Dissertations

This research project evaluates the effects of increased mobility and culture contact on dietary practices, and on dietary variation among people buried at two northern Italian sites, Chiunsano di Ficarolo and Chiesazza di Ficarolo, located near the ancient Roman capital of Ravenna and dating 4th to 7th century CE. The Early Medieval period was a time of change, political instability, migration and invasion of the “barbarian” tribes, and diet was not unaffected. In particular, it is hypothesized that a new staple crop, millet, was introduced and that meat consumption had increased. The goal of this research is to use stable …