Digital Commons Network^™

Development Of Peptidomimetics Based On Γ-Aapeptide Molecular Scaffolds To Modulate Amyloid Peptide Aggregation, Heng Liu

USF Tampa Graduate Theses and Dissertations

Many proteins contain fragments that become structured upon binding to specific targets or through self-association. Notable examples of such disorder-to-order transitions include amyloidogenic proteins like amyloid-β peptide (Aβ) and tau peptide in Alzheimer's disease, α-Synuclein in Parkinson's disease, and hIAPP in type 2 diabetes, and so on. These regions can aggregate into amyloid fibrils through β -sheet stacking, contributing to amyloidosis and related diseases. Although direct link between amyloid formation and neurodegenerative disease development is not fully understood, developing effective inhibitors of these amyloid peptides remains promising both for fundamental research and therapeutical advance.

We have developed a new class …

Improvements In Computational Techniques For Determining Ideal Class Groups And Class Numbers, Muhammed Rashad Erukulangara

USF Tampa Graduate Theses and Dissertations

The ideal class group is a fundamental concept in algebraic number theory, providing insights into the structure and factorization properties of the ring of integers of a number field. It measures the extent to which unique factorization fails in the ring of integers. Efficiently computing the ideal class group is crucial for exploring unproved heuristics in number theory and solving Diophantine equations. Additionally, the computation of the ideal class group has several cryptographic applications, such as schemes based on the Discrete Logarithm Problem (DLP), the computation of isogenies, and groups of unknown order. Despite its importance, much about the ideal …

Breaking The Sound Barrier: Strategies For Reducing The Educational Debt In Underserved School Bands, Alfonzo V. Kimbrough

USF Tampa Graduate Theses and Dissertations

The purpose of this multiple explanatory case study was to investigate the preparation of underserved school band programs for a Music Performance Assessment (MPA). Specifically, I examined racial, economic, and social inequalities, which are well documented in the research literature, and the related achievement gaps of underserved public school bands. Using Ladson-Billings’ four pillars of educational debt, a replication approach highlighted four cases as a small sample of the success rate of Title I school bands scoring a Superior at an MPA contest. I compared how contextual issues impacted the four band directors at these schools in preparations for their …

Migrant Advocates' Perceptions Of School-Based Collaboration, Michael Young

USF Tampa Graduate Theses and Dissertations

Migrant farmworker students are a marginalized group with unique needs. Federal law provides funding for Migrant Farmworker Advocates who support the educational and material needs of migrant farmworker students and their families in public schools. This exploratory study examines the question, how do migrant advocates collaborate with other professionals to support their students with graduation and transitioning to post-secondary opportunities? The study analyzes this unexplored professional relationship between migrant advocates and high school personnel and how they work together to serve migrant students. Data were collected through semi-structured single subject interviews from seven current or former Title I funded Migrant …

Design Of A Satellite Tracking Mobile App Using Flutter And Android Studio Ide, Audrey Tahwa

USF Tampa Graduate Theses and Dissertations

A pop-up free mobile application was developed utilizing one-minute intervals for positiontracking. Predictions are conducted off-line after the user has connected at least once. In In order to enhance data accuracy, the application includes a feature to download satellite data and update raw data to be used in prediction calculations. Additionally, users receive a notification when the application is ready for offline use.

Managing The Relationship Between Hispanic Voters And The State Of Florida: A Quantitative Survey Analysis, Selena M. Gonzalez

USF Tampa Graduate Theses and Dissertations

In recent years, the relationship between registered voters of minority groups and the government of the states they reside in has become increasingly complex due to controversial legislation proposed and often passed in these states. Specifically, some states have passed laws that make it more difficult for Hispanic/Latinx residents to live and work. In particular, Florida has enacted legislation that makes it more difficult for members of the minority groups to vote, drive, and gain access to healthcare. Much of this legislation impacts the Hispanic/Latinx community, which can influence perceptions of the relationship this racial minority has with Florida’s state …

Teachers' And School Directors' Perceptions Of The Benefits Of Arts-Integrated Instruction K-2: Before, During, And After Covid-19, Alison H. Mehler

USF Tampa Graduate Theses and Dissertations

The purpose of this study is to explore the experiences and perceptions of teachers who use arts-integrated instruction and their directors of K-2 students before, during, and after the unique period of online instruction during the COVID-19 pandemic, which began in March of 2020. Arts integration is a method of teaching in which students are taught comprehension of subject areas (i.e. – math, science, reading, social studies) through art forms. These art forms include music, theatre, dance, art, and writing. I collected he qualitative data for this research through virtual interviews with five female participants. I transcribed these interviews and …

An Evaluation Of The Premack Contingency To Increase Physical Activity In Teenagers With Autism Spectrum Disorder, Shreeya S. Deshmukh

USF Tampa Graduate Theses and Dissertations

The United States Department of Health and Human Services (2018) recommends that teenagers engage in physical activity to improve their cardiovascular health and muscle and bone strength. Yet, most teenagers with and without autism spectrum disorder do not meet the recommended guidelines for physical activity. Research related to promoting physical activity has evaluated group contingencies, reinforcement-based interventions, and antecedent interventions; however, these interventions are time-intensive, require many resources, or are ineffective. The purpose of this study was to extend Allen and Iwata (1980) by reinforcing completion of a low-probability exercise to a specified criterion with access to a high-probability exercise. …

Bayesian Analysis Of Hospital Service Quality: Pre- And Post-Covid, Ling Hu

USF Tampa Graduate Theses and Dissertations

The hospital sector is the largest revenue-generating industry in the United States, with a revenue of $1.4 trillion in 2022, accounting for 5.8% of the U.S. GDP. Its service quality profoundly impacts societal welfare, especially given the aging population reached 55.8 million in 2020 and is expected to reach 82 million by 2050. Therefore, multiple policies aim to incentivize sustained healthcare service quality improvements. As an integral component of the Hospital Value-Based Purchasing (HVBP) Program, the Hospital Consumer Assessment of Healthcare Providers and Systems (HCAHPS) survey, administrated by the Centers for Medicare and Medicaid Services (CMS), serves as a cornerstone …

Comparison Of Contingent Vocal Imitation With And Without Supplemental Reinforcement On Vocalizations Of Children With Asd, Megan L. Baumgartner

USF Tampa Graduate Theses and Dissertations

Verbal communication often entails vocal verbal behavior. Research has shown that many children with autism spectrum disorder (ASD) experience delays in the onset of vocalizations, which can hinder the acquisition of more complex vocal verbal behavior. Findings of previous research have also shown that early intensive behavioral intervention (EIBI) is effective at teaching various skills, including verbal behavior, to children with ASD. Moreover, several studies have shown that contingent imitation leads to increases in the frequency of vocalizations and echoic responding of children with ASD; however, no study to date has compared the effectiveness of contingent vocal imitation (CVI) with …

The Application Of Multi-Isotope Analysis To Assist In Geoprofiling Unidentified Decedents Within Florida, Liotta D. Noche-Dowdy

USF Tampa Graduate Theses and Dissertations

The biochemistry of human tissues can provide information for geoprofiling (geographic birthplace or migration patterns) of an unidentified decedent. Utilizing isotope analyses (both stable and radiogenic) from teeth, bone, nails, and/or hair reveals specific isotopic information that correlates to diverse geographic regions reflecting an individual’s birthplace and migration patterns. Isotope analysis of enamel and bone has been employed in bioarchaeology for decades to reconstruct the diet, health, and migration patterns of past populations. Isotope ratios measured from enamel can then be compared to isotope ratios measured from bone of the individual to track patterns of migration. The enamel from the …

The Role Of Pregnancy Intendedness In Shaping Contraceptive Practices And Family Planning Experiences: Evidence From Sub-Saharan Africa, Otobo I. Ujah

USF Tampa Graduate Theses and Dissertations

Background: Despite the associated adverse health and economic implications associated with unintended pregnancy, there remains a paucity of literature examining the effect of unintended pregnancy on postpartum contraceptive and reproductive behavior in many parts of Sub-Saharan Africa (SSA), including Nigeria.

Aims: The overall aim of this doctoral dissertation was twofold. First, to quantitatively examine whether and to what extent the intendedness of a woman’s most recent pregnancy is linked to subsequent contraceptive behaviors and family planning experiences. Secondly, to disentangle the influence of compositional and contextual level factors on these study outcomes. In the first paper, I investigated the extent …

Exploring Online Language Learning Activities And Intercultural Communicative Competence: Perspectives Of International Students, Moneera Abdulaziz Alsubaihi

USF Tampa Graduate Theses and Dissertations

Societies are increasingly aware of the need to connect and communicate globally. Thus, navigating diverse cultural contexts becomes critical, which necessitates intercultural competence—the skill of effective communication and understanding across cultures. As the digital age reshapes our interactions, online learning platforms have emerged as dynamic spaces that foster intercultural engagement and competency development. The purpose of this study was to explore this engagement and development through online English language activities that enhance international students' intercultural communicative competence (ICC) and language learning experience. This qualitative study aimed to provide a comprehensive understanding of international students' experiences in online English language courses, …

An Inference-Centric Approach To Natural Language Processing And Cognitive Modeling, Animesh Nighojkar

USF Tampa Graduate Theses and Dissertations

Reasoning over natural text is highly nuanced, and interpretations can vary widely depending on cultural background, financial status, age, gender, or even mood. This doctoral dissertation seeks to not only mimic human reasoning behaviors but also improve the task used in natural language processing (NLP) to capture naturalistic reasoning, known as the Natural Language Inference (NLI) task. NLI involves determining whether a hypothesis is true (entailment), false (contradiction), or indeterminate (neutral) based on a given premise. Initially, we will investigate the extent to which NLP systems designed to capture semantic equivalence actually measure meaning equivalence. After establishing that they do …

Gone Smishing: An Integration Of Decision-Making And Protection Motivation In The Context Of Identity Theft Victimization, Taylor S. Fisher

USF Tampa Graduate Theses and Dissertations

Methods of obtaining sensitive information from Internet users have evolved consistently as technology has advanced and millions of mobile device users communicate through text (SMS) messaging daily, making them a target for smishing attacks. Smishing (short for SMS phishing) is a form of cybercrime where an offender will send fraudulent text messages attempting to gather sensitive information or convince the user to click on a malicious link. These messages often appear legitimate and rely on tactics like convincing users that immediate action needs to be taken. Smishing has become so widespread that in 2020, the Texas Attorney General issued a …

In The Bodies Of Gods: Bharathanatyam Diaspora Organizing And The Production And Dismantling Of Colonial Logics, Nivethitha Ketheeswaran

USF Tampa Graduate Theses and Dissertations

Bharathanatyam is a dance form dating back to 300 BCE of what is now Tamil Nadu, South India. Bharathanatyam uses hand gestures, facial expressions, and footwork to narrate stories and demonstrate rhythm. This dissertation explores how the global diaspora of bharathanatyam practitioners organize around bharathanatyam informed by colonial logics. In this dissertation I aim to a) define “diaspora organizing” beyond nation-state identity b) apply this definition of diaspora to the global practice of bharathanatyam, and c) explore practitioners sensemaking of their experiences with bharathanatyam. I approach the first goal by defining diaspora in terms of anti-colonial theorizing and describing its …

The Asymmetric Total Synthesis Of Membranolide And Efforts Towards The Oxeatamides, Sean Bradley

USF Tampa Graduate Theses and Dissertations

Total synthesis is a discipline within organic chemistry that is a constant force that propels the field forward. In our lab, we have immersed ourselves within the field of total synthesis to gain access to complex natural products, perform SAR studies, as well as highlight interesting methodology. Within these endeavors, we have completed the first asymmetric synthesis of membranolide. This has allowed us to explore potential biofilm eradication in our efforts to develop novel therapeutics to combat the ESKAPE pathogens and multi-drug resistance. We have also begun to pursue the first asymmetric total synthesis of the oxeatamides. By utilizing our …

The Influence Of Childhood Trauma On Dna Methylation Patterns And Sex-Specific Cortisol Stress Reactivity: A Secondary Analysis, Isabella F. Correia

USF Tampa Graduate Theses and Dissertations

Childhood trauma has been shown to significantly impact physical and mental health outcomes, leading to conditions such as heart disease, diabetes, depression, and difficulties in decision-making and maintaining relationships. Exposure to such trauma has the potential to dysregulate an individual’s stress response system, resulting in abnormal cortisol levels. Many studies suggest a lasting impact of early-life stress on DNA methylation patterns and, separately, cortisol stress reactivity. In addition, there are known sex differences in exposure to childhood trauma and cortisol reactivity; yet studies to date have not investigated whether there is an association to DNA methylation. This study utilized a …

Media Regulatory Dynamics: A Case Study Of Taiwan’S National Communications Commission And Its Implications For Media Independence., Chih-Jeng (George) Huang

USF Tampa Graduate Theses and Dissertations

In alignment with the US-led regime that champions free speech, the Republic of China (Taiwan) has assumed a prominent role in upholding the freedom of expression stance in East Asia. Rooted in historical origins and institutional conflicts between Taipei and Beijing, Taiwan has established a democratic system, presenting a distinct contrast with the Beijing system, and showcasing an alternative Chinese economy that embraces liberalism. Nevertheless, as Beijing’s influence grows stronger globally, Taiwan’s democratic politics have become increasingly delicate and sensitive. In the winter of 2020, Taiwan faced a critical moment in its control over media freedom, highlighting the ongoing tensions …

Reimagining Web Design: Empowering Agency Of Specialized Audiences Through User-Centered Heuristics, Haley Jones

USF Tampa Graduate Theses and Dissertations

This research seeks to create an alternative model for website design that interrogates standardized, linear ways of knowing and being by placing the audience at the center of the web design process. This research contributed a reimagined approach to traditional and standardized web design heuristics by considering an audience-centric methodology that was practical and applicable for web design praxis to create equitable user experiences which can empower audiences to recall their own knowledge and experience to make meaning for themselves through a reimagining of knowledge-making processes in a network of digitized information. In perceiving the rhetorical choice in design of …

“Destiel Is Forever”: Negotiating Authenticity In The Cw’S Supernatural Family And Beyond, Hannah Lay

USF Tampa Graduate Theses and Dissertations

This dissertation examines the communicative constitution of authenticity and queerness. Because queerness has been policed and censored, notions of authenticity, in particular authentic queer representations, are fraught and sustaining to many LGBTQ+ and allied media consumers. The project focuses on the television series Supernatural—specifically, the unfolding of interactions in fan conventions, Twitter/X, and Tumblr involving celebrities and viewers of the series following a social breach, or rupture in the narrative. The last three episodes of Supernatural brought issues of queerness and authenticity to the fore for many viewers, making discussions about these themes compelling sites for multimodal data in the …

A Critical Analysis Of Latine School Psychology Graduate Students’ Socialization Experiences, Chelsea Salvatore

USF Tampa Graduate Theses and Dissertations

This study aimed to uplift and critically analyze the experiences and perspectives of Latine school psychology graduate students regarding their programs' socialization process. I sought to call out oppressive structures and to identify anti-racist practices described by participants. I intended for this to inform school psychology programs on oppressive structures they must dismantle and anti-racist practices that disrupt the status quo to support the well-being and success of Latine graduate students. Seven Latine school psychology graduate students participated in one or two semi-structured interviews. I employed thematic analysis to discover themes from participant interviews. Once themes were identified, I utilized …

Exploring Saudi Families’ Engagement In The Us Early Childhood Schools: Experiences Of Bearing The Burden, Sarah Alberaidi

USF Tampa Graduate Theses and Dissertations

A vast body of research in early childhood education has shown the positive effect of parents' engagement on children's emotional, cognitive, and social development. However, researchers identified limitations to parent involvement activities within the culturally diverse context. The purpose of this case study was to fill the literature gap in exploring how Saudi families engage in their children's early education in the United States. Within the context of sociocultural theory, Muscrit theory, family ethnothories, and mirror, window, sliding glass doors framework, this study aimed to understand the family engagement practices of three Saudi families whose children enrolled in early childhood …

From Graph Theory For Robust Deep Networks To Graph Learning For Multimodal Cancer Analysis, Asim Waqas

USF Tampa Graduate Theses and Dissertations

This dissertation explores the intersection of graph theory and deep learning, focusing on enhancing the robustness of deep neural networks (DNNs) and applying these advancements to complex problems like cancer diagnosis and treatment. We investigate the structural properties of graphs and their influence on neural network performance, particularly in multimodal learning. The work delves into the design space of DNN architectures using graph-theoretic measures, transforming graphs into DNN architectures for various tasks, and examining their robustness against noise and adversarial attacks. The study extends to medical imaging, highlighting advanced DNN architectures like U-Net for brain tumor segmentation. It addresses the …

Evaluation Practices In National Science Foundation Research Experiences For Undergraduates Programs, Aly Busse

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to assess and describe the status of program evaluation within the National Science Foundation’s (NSF) Research Experiences for Undergraduates (REU) sites. The National Science Foundation's REU program supports thousands of undergraduates annually in hands-on, immersive research experiences under the mentorship of science professionals. To date, there is a lack of published or accessible evaluation results from these REU programs and it is unknown what evaluation approaches are being used in the REU programs, how they are designed and implemented, how evaluation findings are utilized, and what barriers to evaluation activities exist. A self-administered electronic …

Narrative Reflection In Collaborative Composition: A Facilitated Approach To Group Processing In Middle Grades, Gretchen M. Dodson

USF Tampa Graduate Theses and Dissertations

This study was situated at Mountain Middle School (Pseudonym). Students at Mountain Middle School often engage in collaborative compositions embedded within week-long multidisciplinary and multiage units of study called Odysseys. These units of study and the collaborative composition projects are classified as formal cooperative learning. Johnson et al., (2010) identified five elements that make cooperative learning effective. These effective elements are: “positive interdependence, individual accountability, promotive interaction, appropriate use of social skills, and group processing” (Johnson et al., 2010, p. 1). The teachers currently design collaborative learning experiences emphasizing four of the five elements of cooperative learning. Together, we identified …

Optimizing Cybersecurity Operations Using Data-Driven Intelligence, Jalal Ghadermazi

USF Tampa Graduate Theses and Dissertations

Cybersecurity operations centers (CSOCs) play a crucial role in safeguarding organizations from cyber threats. CSOC operations are divided into two main areas: Intrusion detection systems (IDS) and security response team (SRT) operations. Machine learning (ML) and deep learning (DL) advancements have significantly improved IDSs. IDS can be either flow-based, suitable for offline analysis, or packet-based, which analyze traffic in real-time. However, packet-based IDS often treat packets independently, ignoring the sequential nature of network communication. Additionally, recent ML/DL approaches also struggle with capturing global and structural information and novel attack detection due to their reliance on labeled data. The SRT within …

Gender Role Depictions In Arabic Children’S Picture Books, Aljawharah A. Almuqbil

USF Tampa Graduate Theses and Dissertations

This study aimed to explore gender role depictions in children's Arabic picture books. The importance of this study emerged from its focus on young children, where the concept of gender begins to be constructed. This study provided insight into the nature of gender roles in children’s picture books, especially under the remarkable changes that Saudi society is witnessing and the lack of Arab studies in this area. Social cognitive theory, gender schema theory, and critical literacy pedagogy guided the study. A sample of 26 picture books was selected from the Child Book Club at King Abdulaziz Public Library and analyzed …

“Siguiendo Adelante”/ "Moving Forward:" Gender-Based Violence (Gbv) Service-Seeking And Survivorship Among Indigenous Guatemalan Women, Caitlynn C. Carr

USF Tampa Graduate Theses and Dissertations

This dissertation examines Indigenous women’s access to and beliefs regarding gender-based violence (GBV) services and the Guatemalan legal system. It illuminates the legal, structural, and institutional challenges and power dynamics associated with seeking support and justice for women in Guatemala, as well as why and how women decide to seek formal assistance. This research also investigates changes in attitudes and beliefs regarding women’s rights, gender roles, and formal and informal forms of support for GBV survivors. Utilizing a mixed-methods, engaged anthropological approach during 10 months of ethnographic fieldwork in two primary locations in Guatemala, this dissertation explicates qualitative data collected …

Understanding Perceptions Of Speech Therapy And Willingness To Continue Seeking Speech Therapy Among Adults Who Stutter, Jaclyn Lucey

USF Tampa Graduate Theses and Dissertations

This project investigates factors associated with treatment-seeking behaviors among adults who stutter (AWS). Specifically, we hypothesized that perceptions of previous speech therapy, including satisfaction with therapy and perceived effectiveness would be related to willingness to seek continued speech therapy. Our project was motivated by a widely used theoretical framework of health service use, and it expands on existing ancillary evidence in stuttering research.

To achieve our objective, we used both qualitative and quantitative methods to gain a more holistic understanding of barriers and facilitators to seeking continued speech therapy. Simultaneously, across two studies, we conducted and analyzed semi- structured interviews …