Digital Commons Network^™

Study Of The Therapeutic Effects Of Synchronization-Modulation Of The Na/K Pump On Muscle Fatigue, Jason E. Mast

USF Tampa Graduate Theses and Dissertations

It has been shown that by applying a specially designed oscillating external electric field to a cell membrane that the membrane's sodium/potassium pumps can be synchronized to all work at the same rate. Then by slowly increasing the electric field's frequency the pumps' turnover rate can also be increased. By increasing the pumps' turnover rate, the sodium and potassium concentration gradients can be increased, this type of stimulation is called synchronization-modulation. There are three generations of the synchronization-modulation waveform each with different utilities. In particular, the third generation of synchronization-modulation has the ability to use the energy of the external …

Does Hedging Success Matter? An Empirical Study Of Jet Fuel Hedging In The U.S. Airline Industry, Brian Hornung

USF Tampa Graduate Theses and Dissertations

Airlines commonly employ hedging as a risk management strategy to protect themselves against sudden, unpredictable increases in the price of jet fuel. In a seminal paper by Carter, Rogers, and Simkins (2006), it is established that jet fuel hedging by airlines increases the firm value of the airline. This dissertation replicates their study using an expanded dataset over a greater period of time. This study finds a smaller “hedging premium” than Carter, Rogers, and Simkins (2006). It is shown that the leasing of aircraft plays an important role in the relationship between the hedging premium and capital expenditures.

The measure …

Composition Of Atomic-Obligation Security Policies, Danielle Ferguson

USF Tampa Graduate Theses and Dissertations

There has been significant work to date on policy-specification languages that allow specification of arbitrary obligations, but there continues to exist open challenges in the composition of these arbitrary obligations, especially when obligations can be complex (i.e. consist more than one action). There are currently no solutions that allow complete and automatic resolution of conflicts between policies and other policies' obligations or that allow policies to react to the complex obligations of other policies. In particular, there is minimal work that considers the benefits and challenges of allowing complex obligations that operate in an atomic fashion, that is that execute …

Allosteric Control Of Proteins: New Methods And Mechanisms, Nalvi Duro

USF Tampa Graduate Theses and Dissertations

Allostery describes the phenomenon where perturbations in one region of a protein affect protein behavior in another non-overlapping region. Considerable efforts made over decades to understand the molecular basis of allostery, yet an overarching theory that can predict signaling pathways and contributions from chemical components is still lacking. In fact, molecular details in even the most well-studied of model systems, PDZ domains and GPCRs, remain unclear. In this dissertation I use molecular simulation methods to understand the role of allostery in the regulated entry of paramyxovirus into host cells, and also develop a new method to determine time-dependent signaling pathways …

Complexities Of Data, Tasks And Workflows In Health It Management, Gaurav Jetley

USF Tampa Graduate Theses and Dissertations

This dissertation focuses on three key aspects in health IT management: (1) Complexities in the collection of health data in electronic health record (EHR) systems and the use of EHR data in research, (2) Complexities of collaboration between physicians and AI for improving healthcare delivery, and (3) Complexities of workflows and collaborations between healthcare organization (HCO) staff during the delivery of care. The first dissertation essay (Chapter 1) examines the key data quality issues that arise in recorded health information in EHR systems, provides quality thresholds that the data needs to meet for mitigating errors and increasing reproducibility of downstream …

Developing Agent-Based Models To Study Financial Markets, Saurav Chakraborty

USF Tampa Graduate Theses and Dissertations

This dissertation presents research that employs agent-based modelling to provide a framework to support simulation as a complement to traditional economic models for policy evaluation. It consists of three studies. The first study employs cluster analysis to capture the different types of banks and the associated business models that define their decision-making. The results from study one will help us get an understanding of how different banks behave and provide an insight into their lending practices. Hence, it would be very helpful in evaluating and analyzing the impact of future policies. Study two develops a fine-grained interbank lending model based …

The Threat Of Virality: Digital Outrage Combats The Spread Of Opposing Ideas, Curtis Puryear

USF Tampa Graduate Theses and Dissertations

The prevailing stage for conversations about politics and morality has shifted from private and face-to-face to public and digital. Moreover, the digital landscape itself changed considerably in the past decade. The era of static webpages has been replaced by dynamic social networks where ideas and reactions to events spread rapidly. With every comment we, or a political adversary makes, numbers quantifying social approval tick up or down. Instead of holding digitized versions of one-on-one conversations, we argue in front of audiences who throw digital “points” at and accelerate the spread of the winning side’s ideas. I argue this subjectively raises …

Auditory Perception And Neural Encoding Of Spectral Modulation, Sittiprapa Isarangura

USF Tampa Graduate Theses and Dissertations

Most natural acoustic sounds consist of multiple frequencies. An important auditory perceptual ability to resolve such acoustic properties is referred to as spectral processing and includes frequency resolution, frequency selectivity and spectral envelope perception. Frequency resolution, as demonstrated by masking techniques, indicates that our auditory system functions as an auditory filter bank with overlapping bandpass filters. These filters allow for the effective separation of sounds into different frequency bands or channels. Acoustic components that fall within a given filter or passband are considered to be processed “within channel” and are perceptually resolved using “local” spectral cues, whereas components in different …

Explore L2 Chinese Learners' Motivation Through L2mss: Selves, Mental Imagery, And Pedagogical Implications, Yao Liu

USF Tampa Graduate Theses and Dissertations

Motivation is understood as the original drive of a person to make specific choices, engage himself or herself to make efforts, and to be persistent for the pursuit of the goals. Over the decades, numerous studies have been dedicated to studying this complex and significant construct, in both the fields of Second Language Acquisition and Social Psychology. Since the beginning of the last decade, the findings and theories of motivation research of the two fields mentioned above have been merged and integrated by Dörnyei (2005, 2009) to explain the second language learners’ motivation. This vigorous Second Language Motivational Self System …

Making Meaning Of A Whole School Transformation Model: A Policy Ethnography Of A Schools Of Hope Legislation Implementation, Adam Charles Rea

USF Tampa Graduate Theses and Dissertations

Cheryl High School (CHS) is a geographically large county in Florida that received funding through the state of Florida's "Schools of Hope” grant. The grant’s parameters called on Carter County Schools (CCS) to partner with an external consultant and a research university to help improve teacher and school administrative capacity. The district chose Scientific Pedagogy Services (SPS) and to continue their existing relationship with Tampa Bay State University (TBS). The consultant’s mission was to improve school performance through a unique form of professional development. TBS was charged with developing an on-site program that funded staff efforts to obtain advanced degrees …

Functional Object-Oriented Network: A Knowledge Representation For Service Robotics, David Andrés Paulius Ramos

USF Tampa Graduate Theses and Dissertations

In this dissertation, we discuss our work behind the development of the functional object-oriented network (abbreviated as FOON), a graphical knowledge representation for robotic manipulation and understanding of its own actions and (potentially) the intentions of humans in the household. Based on the theory of affordance, this representation captures manipulations and their effects on actions through the coupling of object and motion nodes as fundamental learning units known as functional units. The activities currently represented in FOON are cooking related, but this representation can be extended to other activities that involve manipulation of objects which result in observable changes of …

Nostalgia And (In)Authentic Community: A Bataillean Answer To The Heidegger Controversy, Patrick Miller

USF Tampa Graduate Theses and Dissertations

Heidegger’s relationship with Nazism has been debated since the 1930s. In the late 1930s, Georges Bataille wrote an incomplete text that would have added to these debates, “Critique of Heidegger: Critique of a philosophy of fascism.” I draw on this fragment and Bataille’s writings from this era in order to develop a fuller critique of Heidegger and his relationship to fascism. This expanded critique completes the promise of Bataille’s original fragment, offering a full Bataillean criticism of Heidegger and displaying the connections between his philosophy and Bataille’s understanding of fascism. This critique hinges on Heidegger’s concept of authenticity and community, …

Large Thecosome Pteropods Of The Northern Gulf Of Mexico: Species Abundance, Spatial And Vertical Distribution With A Temporal Comparison Of Shell Thickness, Sarah M. Shedler

USF Tampa Graduate Theses and Dissertations

Large thecosome pteropods have a significant role in the pelagic ecosystem of the northern Gulf of Mexico (GoM). This research analyzed species abundances, vertical and horizontal distributions, and trends in shell thickness between 2011 and 2015. Pteropod samples were collected following the 2010 Deepwater Horizon oil spill by two midwater sampling programs: the Offshore Nekton Sampling and Analysis Program (ONSAP, 2011) and the Deep Pelagic Nekton Dynamics of the Gulf of Mexico (DEEPEND, 2015). All samples were collected using a 10-m2 Multiple Opening/Closing Net and Environmental Sensing System (MOC10) midwater trawl, with 3-mm mesh size. This gear sampled five discrete …

Addressing The Student Loan Crisis: Nudging Borrowers To Lower Their Repayment Costs, Genevieve O. Dobson

USF Tampa Graduate Theses and Dissertations

The Purpose of Research is to determine why student loan borrowers are making poor decisions regarding their repayment plan selection and how we could use the theory of nudge to get them to make better choices. This study evaluates three main biases found in decision making to determine which one is most likely to be utilized in making decisions. It also investigates ways a tool can be created to allow borrowers to make better choices.

I use the Elaborated Action Design Research Methodology to diagnose, design and implement an effective tool. In my study, I create an artifact that allows …

To Mid-Cell And Beyond: Characterizing The Roles Of Gpsb And Ypsa In Cell Division Regulation In Gram-Positive Bacteria, Robert S. Brzozowski

USF Tampa Graduate Theses and Dissertations

The bacterial cell division protein FtsZ is a tubulin homolog that forms a ring-like structure at the site of cell division in most bacterial species. There it acts as a scaffold, aiding in the recruitment of other divisome proteins to the site of cell division. Furthermore, studies focusing on the role of FtsZ treadmilling and septal peptidoglycan synthesis implicates that FtsZ plays a direct role in the ultimate closure of the division septum. Thus, many studies in the field of bacterial cell division have focused on FtsZ in terms of its spatial and temporal regulation as well as its ability …

Investigation Of Machine Learning Algorithms For Intrusion Detection System In Cybersecurity, Mohmmed Alrowaily

USF Tampa Graduate Theses and Dissertations

The proliferation in usage and complexity of modern communication and network systems, a large number of trustworthy online Services and systems have been deployed. Even so, cybersecurity threats are still growing. An Intrusion Detection System (IDS) play a vital role in ensuring the security of communication networks, and it is taken into account as the subsequent security gate after the firewall. The IDS informs the system or network administrator in order to take specific actions to evade the suspicious activities. Three significant contributions are made during the course of this research to illustrate the feasibility of these IDS approaches. In …

Growth And Characterization Of Spatially Ordered Nanostructures Of Functional Materials, Domingo J. Mateo Feliciano

USF Tampa Graduate Theses and Dissertations

Thin films and nanostructures of functional materials like lead zirconium titanite oxide (PZT) and Zinc Oxide (ZnO) offer multitude of applications in ferroelectrics, piezoelectrics and piezotronics. While the properties of thin films of ZnO and PZT are well understood, methods for the fabrication of vertically-aligned and spatially ordered nanocolumns of these materials are not common. To achieve a spatially ordered arrangement of either PZT or ZnO, a Silica Nanosphere (SNS) Monolayer Template has been constructed to serve as nucleation site for the growth of a specific number of nanocolumns. The SNS monolayer template is constructed by Langmuir-Blodgett dip coating, using …

Women In Water: An Interpretative Phenomenological Analysis Of Women's Lived Experience As Water And Wastewater Professionals, Pamela Murawski

USF Tampa Graduate Theses and Dissertations

The purpose of this interpretative phenomenological analysis was to explore the lived experiences of women water and wastewater professionals in California. A qualitative methodology and semi-structured interviews provided detail and a rich understanding of women’s occupational choices, pursuits, and roles as told from their own perspectives. The results revealed that while working in water promoted a sense of pride, accomplishment, and empowerment, women continued to fight for equal access and full participation in lucrative water treatment careers. Key issues the women indicated were lack of knowledge of the industry, the necessity of mentorship, access to technical information, and the male-centered …

Laser-Induced Breakdown Spectroscopy For Elemental Analysis In Bioarchaeology And Forensic Anthropology, Kelsi N. Kuehn

USF Tampa Graduate Theses and Dissertations

Within bioarchaeology and forensic anthropology, the current processes of differentiating between individual human skeletal remains are imprecise, costly, and inefficient. A novel analytical technique within anthropology, laser-induced breakdown spectroscopy (LIBS) can aid in the identification of human remains using rapid laser ablation occurring at the micro-scale, making the technique virtually non-destructive to the sample. Considering this, LIBS could offer a superior method for materials discrimination and human identification. This research sought to examine whether LIBS can be used to obtain elemental signatures within bones to distinguish individuals from one another in a rapid, non-destructive manner. Seven human skeletal donors and …

Enhancement Of 5g Network Performance Using Non-Orthogonal Multiple Access (Noma), Faeik Tayseer Al Rabee

USF Tampa Graduate Theses and Dissertations

This dissertation is composed of two parts. The first presents several approaches to enhance the performance of 5G wireless systems by using NOMA (Non-Orthogonal Multiple Access) as the multiple access technique under different scenarios and performance metrics. The second investigates the performance of a wireless system network using a mobility model to evaluate the channel capacity taking into account motion. Both studies are directed towards improving the system performance in wireless communication systems.

In the first part, the optimum received power level for uplink power-domain NOMA with ideal Successive Interference Cancellation (SIC) reception is derived for any number of transmitters. …

Voices Of Success: Exploring Black Male Students’ Perspectives On Their Academic Success, Carmen Goldsmith

USF Tampa Graduate Theses and Dissertations

Higher education enables individuals to be prepared to make an impact in the global society through enhanced skills and the ability to understand their community and the world in which they reside. According to EVERFI (2019), studies showed that diversity in education, specifically on college campuses, improve a student’s intellectual engagement, motivation, citizenship, and cultural engagement, while enhancing their critical thinking, problem-solving, and writing skills. It is advantageous for students to work with people from other races, ethnicities, and varying socioeconomic and cultural backgrounds. These differences prepare students to succeed in a diverse world and broaden their understanding and awareness …

Implementing The Class Pass Intervention Within Schoolwide Positive Behavior Interventions And Support, Nicole Harris

USF Tampa Graduate Theses and Dissertations

Disruptive behavior is a challenge to classroom management for many teachers. Behavior such as calling out, getting out of seat, and off-task during instructions interfere with instructional time and have negative impacts on student learning. The Class Pass Intervention (CPI) is an antecedent-based intervention that has proven effective in decreasing disruptive behavior and increasing academic engagement for students of various ages and skill levels. This study aimed to expand the literature on CPI as a Tier 2 intervention within Schoolwide Positive Behavioral Interventions and Supports by targeting three elementary age students with or at-risk for emotional and behavioral disorders, who …

Use Of High-Probability Instructional Sequences During Pre-Academic Activities For Young Children With Autism Spectrum Disorder, Danielle Russo

USF Tampa Graduate Theses and Dissertations

The antecedent-based strategy, known as the high-probability (high-p) instructional sequence has been one effective way to facilitate teachers to prevent noncompliant behavior and increase acquisition of functional and adaptive behaviors for children with autism spectrum disorders (ASD). However, the outcomes of using the high-p instructional sequence as an intervention in school settings remain inconsistent. In this study, we examined the use of the high-p instructional sequence intervention during pre-academic and academic activities for three young children with ASD. Specifically, the study focused on examining the overall effects of the high-p instructional sequence on initiation and compliance to low-probability (low-p) instructions, …

Analyzing The Retention Of Knowledge Among General Chemistry Students, James T. Kingsepp

USF Tampa Graduate Theses and Dissertations

General chemistry is a survey course meant to form a foundation for students’ to build upon as they progress into chemistry sub-disciplines. The effectiveness of this foundation rests heavily on students’ abilities to retain or relearn concepts from the course. This study seeks to investigate the utility of a measure of general chemistry students’ knowledge retention across the time period of one semester. This approach was enacted in five different courses of either first or second semester general chemistry. The results showed that one-quarter to one-half of students exhibited a high rate of retention across the semester. A smaller group, …

Evaluation Of Native Advertisement Though Third Person Effect Theory: An Experimental Design, Inga Nafetvaridze

USF Tampa Graduate Theses and Dissertations

The main purpose of this research is to determine how people evaluate native advertising in order to figure out how ethical is a native advertising practice. The Third Person Effect Theory was applied to this study. It enables to examine people’s attitude toward native advertising. An experimental design was developed. Participants were exposed to three types of ads to find out if they are able to recognize native ads among other advertisements. The total number of participants was 386. The results were analyzed via ANOVA. The main finding of this study states that individuals perceive the native advertisement in a …

Enhanced Fluoride Removal In Biosand Filters Using Aluminum Oxide Coated Media And Modified Filter Design, Madison Leigh Rice

USF Tampa Graduate Theses and Dissertations

In 2010, the UN formally stated that access to safe drinking water and sanitation is a human right. Yet, one in three people globally do not have access to safe drinking water. Contaminated drinking water can negatively impact the health of consumers. This is a challenge that disproportionally affects developing regions, where limited access to resources exacerbates the problem. One drinking water contaminant of concern is fluoride. Fluoride is often added in low concentrations to drinking water to enhance consumers’ dental health. However, when water with high concentrations of fluoride is consumed frequently, it can have negative health effects, such …

Using Generalization-Enhanced Behavioral Skills Training To Teach Poison Safety Skills To Children With Autism, Ellie Morosohk

USF Tampa Graduate Theses and Dissertations

It is important for children to learn safety skills, especially involving dangerous stimuli such as medicine that can be found in almost every household. This study examined a generalization-enhanced behavioral skills training package to teach children with autism poison safety skills. Three children ages 4- to 10-years-old received generalization enhanced BST to teach the safety skills required when they found pills. In situ assessments were conducted both in home and in the clinic to examine whether the skills generalized to the natural setting. All children engaged in the safety skills following training. The results of this study indicated that generalization …

Choice Versus Reinforcement: Which Produces Better Effects In Decreasing Disruptive Behavior For Students With Or At Risk Of Emotional And Behavioral Disorder?, Sara M. Hordges

USF Tampa Graduate Theses and Dissertations

As the number of students with developmental disabilities increases in schools (U.S. Department of Education, 2017a), so does the need for effective interventions within school settings. Both antecedent and consequence interventions have been conducted within schools in attempts to decrease maladaptive behaviors and increase appropriate behaviors in relation to academics. Providing choices and reinforcement have demonstrated empirical evidence that both interventions were successful in creating positive behavior change in students with emotional and behavioral disorders (EBD). This study compared the use of an antecedent-based intervention (i.e., activity choice) versus a consequence-based intervention (e.g., differential reinforcement without extinction) to determine which …

Extending Brief Error-Correction Assessments To Adults With Intellectual Or Developmental Disabilities, J Turner B. Braren

USF Tampa Graduate Theses and Dissertations

We extended the results of Carroll, Owsiany, and Cheatham (2018) by evaluating the predictive validity of a brief error-correction assessment (brief assessment) in adults with intellectual or developmental disabilities. A brief assessment and validation assessment were conducted for each participant, where the efficiency and intrusiveness of six error-correction procedures (ECP) were compared when teaching participants to assemble arbitrary Lego structures. During Phase 1, we evaluated whether we obtained orderly acquisition data during the brief and validation assessments and evaluated overall correspondence between the brief and validation assessments. During Phase 2, we developed an empirical decision-making model to identify the most …

Some Effects Of Metronome Modality On Speech Rate, Zachary Z. Hand

USF Tampa Graduate Theses and Dissertations

Effects of three metronome modalities on speech rate were examined for three college students. Five conditions were tested for comparison of the effects of each modality. In the first phase of the multielement evaluation none of the modalities succeeded at decreasing the speech rate of the subjects to the target range. During the second phase, a modeling plus feedback component was implemented which successfully decreased the speech rate to the target range for each subject. In the post assessment the effects of the model and feedback component maintained for each subject. These findings may suggest that the use of a …