Digital Commons Network^™

Beyond The Hype: Challenges Of Neural Networks As Applied To Social Networks, Anthony Hernandez

USF Tampa Graduate Theses and Dissertations

Recent advances in neural network-based machine learning algorithms promise a rev-olution in prediction tasks across a variety of domains. Of these, forecasting user activity insocial media is particularly relevant for problems such as modeling and predicting informa-tion diffusion and designing intervention techniques to mitigate disinformation campaigns.Another potential task is anonymizing social network datasets to facilitate their distributionand promote research. Given the success of deep generative models, it may be possible touse them for anonymization. Social media seems an ideal context for applying neural net-work techniques, as they provide large data sets and challenging prediction objectives. Yet,our experiments find a number …

Using Optimization Methods For Solving Problems In Sustainable Urban Mobility And Conservation Planning, Zulqarnain Haider

USF Tampa Graduate Theses and Dissertations

This dissertation considers three separate optimization problems related to sustainable urban and environmental systems. The first problem relates to the nightly relocation and recharging operations for Free-floating electric vehicle sharing (FFEVS) systems. Such operations involve a crew of drivers to move the shared electric vehicles (EVs), and a fleet of shuttles to transport those drivers. Mixed integer programs are used to model the relocation and recharging operations. Two approaches are devised: sequential and synchronized approaches. In the sequential approach, the movement of EVs is first decided, then the routing of shuttles and drivers is determined. In the synchronized approach, all …

Changing The Culture Of Consent: Teaching Young Children Personal Boundaries, Marlesha C. Bell

USF Tampa Graduate Theses and Dissertations

Currently, eight states and Washington D.C. mention consent education in their sex education standards (Naide, 2020). Most school-based consent education curricula focus on teaching pre-teens through adults consent within the context of sexual contact (Planned Parenthood, 2016). However, consent may be relevant for behavior outside the context of sexual contact. Young children could develop a repertoire for consent skills and use it to set and respect boundaries. Furthermore, behavior analysis has teaching technologies that could be used to inform a curriculum for teaching consent, such as behavioral skills training (Johnson et al., 2006) and video modeling (Charlop & Milstein, 1989). …

Early Adolescents' Basic Psychological Need Satisfaction And Frustration, Motivation, And Verbal Divergent Thinking Within An Out-Of-School Context, Megan Louise Atha

USF Tampa Graduate Theses and Dissertations

Early adolescence is a vital time for the development of creative thinking and behaviors (Barbot et al., 2016) as well as for examining factors that influence the motivation of youth to engage and persist in creative processes and to develop creative abilities (Beghetto & Dilley, 2016). In order to support the motivation towards creative pursuits that may be unique to early adolescent youth, the satisfaction of basic psychological needs for competence, autonomy, and relatedness may be important. Since out-of-school contexts are an increasingly important element of adolescents’ day-to-day experiences, research that investigates how contextual factors contribute to the development of …

Distributed Control Of Multiagent Systems Under Heterogeneity, Selahattin Burak Sarsilmaz

USF Tampa Graduate Theses and Dissertations

The overarching objective of this work is to propose solutions to quite a few distributed control problems arising from networks of heterogeneous agents or the heterogeneous nature of multiagent systems. Each problem with its solutions is concisely summarized below.

We consider the cooperative output regulation problem of heterogeneous linear multiagent systems over fixed directed communication graphs. The purpose of this problem is to design a distributed control law such that the overall closed-loop stability is ensured and the tracking error of each agent converges to zero asymptotically for a class of reference inputs and disturbances generated by a so-called exosystem. …

A Health Evaluation Of Gulf Of Mexico Golden Tilefish (Lopholatilus Chamaeleonticeps) And Red Snapper (Lutjanus Campechanus) Following The Deepwater Horizon Oil Spill, Kristina Leigh Deak

USF Tampa Graduate Theses and Dissertations

A lack of baseline heath indices for offshore Gulf of Mexico (GoM) teleosts complicated impact assessments of the Deepwater Horizon (DWH) oil spill. While measurement of contaminant levels in fish after a pollution event can document exposure, such data fail to provide meaningful information about how this contact affects an animal's physiology. Controlled exposure studies have highlighted the utility of biomarkers that may indicate deleterious, long-lasting effects of pollutant exposure on various life stages of fish, however, their extrapolation to wild-caught, non-model species is challenging. In an increasingly chemically-saturated environment, it can also be difficult to separate the influence of …

Development Of An Integrated Direct Membrane Filtration (Dmf) And Anaerobic Membrane Bioreactor (Anmbr) System For Dilute Municipal Wastewater Treatment, Ahmet Erkan Uman

USF Tampa Graduate Theses and Dissertations

The total electricity consumption due to municipal wastewater treatment in the US accounts for 1.3% of total demand. Also, a significant portion of biodegradable constituents in wastewater is converted into biomass, which needs further processing. On the one hand, an excessive amount of energy and chemicals are being used to treat wastewater, but on the other hand, resources (such as nitrogen and phosphorus, energy, and water) in wastewater are being discharged or removed rather than recovered. From this perspective, new wastewater treatment technologies are sorely needed to facilitate resource recovery from wastewater for a better, more sustainable future.

Anaerobic membrane …

Machine Learning For The Internet Of Things: Applications, Implementation, And Security, Vishalini Laguduva Ramnath

USF Tampa Graduate Theses and Dissertations

Artificial intelligence and ubiquitous sensor systems have seen tremendous advances in recent times, resulting in groundbreaking impact across domains such as healthcare, entertainment, and transportation through a collective ecosystem called the Internet of Things. The advent of 5G and improved wireless networks will further accelerate the research and development of tools in deep learning, sensor systems, and computing platforms by providing improved network latency and bandwidth. While tremendous progress has been made in the Internet of Things, current work has largely focused on building robust applications that leverage the data collected through ubiquitous sensor nodes to provide actionable rules and …

Efficient Viewshed Computation Algorithms On Gpus And Cpus, Faisal F. Qarah

USF Tampa Graduate Theses and Dissertations

Nowadays with the advance in managing and collecting large data, GIS is one of the applications that suffer from lack of efficient data management methods. GIS data often come in form of maps with different types of data such as temperature, topology, and population.

This dissertation focuses on exact-viewsheds computation for large terrains, and due to the poor performance of current exact-viewshed algorithms that may need several hours to process a midsize map, we found the need for new algorithms that are capable of efficiently computing viewshed for large size maps. This work presents a highly-efficient exact-viewshed computation algorithm based …

Opportunities Provided In Mathematics Methods Textbooks For Pre-Service Teachers To Develop Mathematical Knowledge For Teaching Fractions, Irem Ercan

USF Tampa Graduate Theses and Dissertations

I explored using qualitative content analysis what type of opportunities in mathematics methods textbooks are provided for pre-service elementary teachers to develop Mathematical Knowledge for Teaching Fractions (MKTF). Specifically, I examined all fractions tasks that are located in fraction chapters of mathematics methods textbooks in order to explore the ways they support pre-service teachers’ Subject Matter Knowledge and Pedagogical Content Knowledge of fractions.

I used qualitative content analysis of three mathematics methods textbooks to analyze how MKTF is offered for pre-service elementary teachers. In particular, I investigated the chapters that are designated to fraction concepts using both deductive and inductive …

Socio-Technical Transitions In The Water Sector: Emerging Boundaries For Utility Resilience In Barbados, Wainella N. Isaacs

USF Tampa Graduate Theses and Dissertations

Resilience is gaining popularity in the water sector where it described as contributing to reduced vulnerability to water-related risks and hazards including climate change. Unfortunately, literature in this area, contributed mainly from North America and Europe, is fragmented with a concentration on engineering resilience in water supply infrastructure. The absence of any scholarship on resilience for a small island nation, coupled with the absence of sociological contributors to building resilience in this sector motivated this research.

The goal of this research was to understand and evaluate how resilience is characterized and operationalized in the Barbados water and wastewater infrastructure system, …

Effects Of Inter-Male Status Challenge And Psychopathic Traits On Sexual Aggression, Amy M. Hoffmann

USF Tampa Graduate Theses and Dissertations

Sexual aggression (SA) is a serious social problem that has been linked to a variety of negative physical and mental health outcomes for survivors and produces significant monetary costs to society. In the past five decades, a wealth of research has improved our understanding of the individual and sociocultural factors that contribute to SA perpetration; however, epistemological differences in theoretical approaches to the subject (i.e., evolutionary, feminist) have resulted in gaps in the empirical literature. Informed by both feminist and evolutionary perspectives, this study attempts to examine the ways in which same-gender interpersonal interactions and individual psychopathology interact to produce …

Teacher Leadership: The Value Of Action Research In The Development Of Science Teacher Leaders, Vanessa Vernaza-Hernández

USF Tampa Graduate Theses and Dissertations

The past few years have seen the establishment of many professional development programs for science teachers leaders aimed at improving the process of teaching and learning of science. One of these is the Robert Noyce Master Teacher Fellows (MTF) program, which is part of a research university in the southeastern United States. This is an extended teacher development program with the purpose of developing effective science and mathematics teachers into successful teacher leaders, professional development providers, curriculum developers, and formal mentors. One of the characteristics that distinguishes this MTF program is that, as part of the leadership development experiences, the …

Effects Of Physical And Chemical Characteristics Of Slags And Cements On Durability Of Portland Cement-Slag Blended Systems, Farzaneh Nosouhian

USF Tampa Graduate Theses and Dissertations

Ground granulated blast furnace slag (GGBFS) which is a commonly used supplementary cementitious material (SCM) needs to be more investigated for improving durability of concrete elements and service life of concrete structures. This research focuses on the effect of the physical and chemical characteristics of GGBFS and portland cement on durability of portland cement-slag blended systems. The effect of cement replacement level is also investigated using control mixes (no slag) and four different levels of slag content. To this end, eight GGBFS and eight portland cements were selected based on their physical characteristics and chemical composition. Four series of experimental …

Textbooks As A Tool For Planning And Facilitating Mathematical Discourse, Denise L. Polojac-Chenoweth

USF Tampa Graduate Theses and Dissertations

Across the nation, mathematics teachers are struggling to help their students meet the demands of high stakes testing while adhering to state standards for content and teaching and dealing with the time constraints imposed by school activities, paperwork, and testing schedules. Classroom mathematical discourse is touted as a central element of a quality mathematics learning environment. Nevertheless, many teachers struggle to implement mathematical discourse effectively. This dissertation aims to explore the use of textbooks as tools to support teachers in the planning and facilitation of mathematical classroom discourse.

In this study, I employed a mixed-methods design to investigate (1) how …

Relational Joins On Gpus For In-Memory Database Query Processing, Ran Rui

USF Tampa Graduate Theses and Dissertations

Relational join processing is one of the core functionalities in database management systems. Implementing join algorithms on parallel platforms, especially modern GPUs, has gain a lot of momentum in the past decade. This dissertation addresses the following issues on GPU join algorithms. First, we present empirical evaluations of a state-of-the-art work on GPU-based join processing. Since 2008, the compute capabilities of GPUs have increased following a pace faster than that of the multi-core CPUs. We run a comprehensive set of experiments to study how join operations can benefit from such rapid expansion of GPU capabilities. We also present improved GPU …

The Confederate Triumvirate: Stonewall Jackson, Robert E. Lee, Jefferson Davis, And The Making Of The Lost Cause, 1863-1940, Aaron Lewis

USF Tampa Graduate Theses and Dissertations

While numerous historians have studied and written about the lives and deeds of Stonewall Jackson, Robert E. Lee, and Jefferson Davis, fewer have conducted analyses of these three individuals’ popular memories. This study considers how the memory of these three Confederate leaders formed the foundation of the Lost Cause. From 1863 through the 1940s, white southerners held each of these three men in high esteem, proclaiming them as heroes to the dead Confederate ideology. Orators and writers who built the Lost Cause in South consistently utilized their memories to argue in favor of the righteousness of the Confederate cause and …

Active Deep Learning Method To Automate Unbiased Stereology Cell Counting, Saeed Alahmari

USF Tampa Graduate Theses and Dissertations

Cell quantification in histopathology images plays a significant role in understanding and diagnosing diseases such as cancer and Alzheimers. The gold-standard for quantifying cells in tissue sections is the unbiased stereology approach. Unfortunately, in unbiased stereology current practices rely on a well-trained human to manually count hundreds of cells in microscopy images. However, this human-based manual approach is time-consuming, labor-intensive, subject to human errors, recognition bias, fatigue, variable training, poor reproducibility, and inter-observer error. Thus, the lack of high-throughput technology for automating unbiased stereology analyses remains a major obstacle to further progress in a wide range of neuroscience and cancer …

Spatial Heterogeneity Utilization In Ct Images For Lung Nodule Classication, Dmitrii Cherezov

USF Tampa Graduate Theses and Dissertations

Lung cancer (LC) is leading in the number of deaths among the other types of cancer. According to the American Cancer Society, 135,720 deaths during 2020 in the USA will be associated with LC. The patient 5-year survival rate of 16\% was reported in 1986 and 19% in 2019. One of the reasons why survival rate remains low is that the majority of patients diagnosed with cancer had stages III and IV. In contrast, a 5-year survival rate of 70% was reported for patients of stage IA after surgical resection in the National Lung Screening Trial.

CT screening detects a …

Next-Generation Self-Organizing Communications Networks: Synergistic Application Of Machine Learning And User-Centric Technologies, Chetana V. Murudkar

USF Tampa Graduate Theses and Dissertations

The telecommunications industry is going through a metamorphic journey where the 5G and 6G technologies will be deeply rooted in the society forever altering how people access and use information. In support of this transformation, this dissertation proposes a fundamental paradigm shift in the design, performance assessment, and optimization of wireless communications networks developing the next-generation self-organizing communications networks with the synergistic application of machine learning and user-centric technologies.

This dissertation gives an overview of the concept of self-organizing networks (SONs), provides insight into the “hot” technology of machine learning (ML), and offers an intuitive understanding of the user-centric (UC) …

The Effects Of Surface-Water Flow On The Quality Of Groundwater And Surface-Water Systems, Quanghee Yi

USF Tampa Graduate Theses and Dissertations

My research has focused on the effects of surface-water flow on the quality of groundwater and surfacewater systems. For the first part of my research (Chapter 2 ), I s tudied the effects of s urface flow system changes in the water-conservation areas and canals in southeast Florida on the quality of groundwater in the surficial aquifer system.

For the second part of my research, by developing analytical models using the superposition method, I investigated the effects of bidirectional surface-water flow on the conservative contaminant concentrations (Chapter 4) and mean residence time (Chapter 5) in streams and rivers as well …

Structural And Agricultural Value At Risk In Florida From Flooding During Hurricane Irma, Alexander J. Miller

USF Tampa Graduate Theses and Dissertations

Flooding is the most costly type of natural disaster, as well as the most frequent. To provide risk-based flood insurance, providers such as FEMA must be able to accurately determine an asset’s risk of flooding. Additionally, after a flooding event, providers need to quickly determine the direct damages that occurred to verify insurance claims and provide assistance to the affected communities. Many current approaches to flood risk and flood damage estimation involve the use of data or statistical extrapolation that can add various sources of uncertainty into the final damage estimate. In order to reduce uncertainties in flood risk analyses, …

Eppm And Its Effectiveness In Advertisements Of Colorectal Cancer Screening Among Young Adults, Anh T. Nguyen

USF Tampa Graduate Theses and Dissertations

Colorectal cancer is one of the deadliest types of cancer around the world and in the United States, yet it could be highly preventable by following the recommended guidelines of getting screened by the age of 50 and above. The focus of this study was on the Extended Parallel Process Model and sought to understand the efficacy and threat components in the fear appeal messages in the context of colorectal cancer screenings. Specifically, the study examined how young adults react when being exposed to those messages and whether they intended to discuss with their parents about it. The study also …

Biogas Upgrading Via Solid Resin-Based Amine Sorbents, Olusola Johnson

USF Tampa Graduate Theses and Dissertations

Biogas is a valuable renewable energy generated from anaerobic digestion of biodegradable organic matter. It is applicable as fuel in vehicles, for the generation of electricity, industrial heating, or as raw material to produce chemicals, liquid fuels, syngas, and compressed natural gas (CNG). Carbon dioxide (CO2) and methane (CH4) are the major components in biogas, with a trace amount of contaminants, including hydrogen sulfide (H2S), water vapor (H2O), nitrogen (N2), ammonia (NH3), oxygen (O2), carbon monoxide (CO), halides, volatile organic compounds (VOCs), siloxanes, and hydrocarbons.

The source of biogas, which is anaerobic digestion of different organic matter or landfill decomposition, …

Bio-Electrochemical Denitrification Systems And Applications For Nitrogen Removal In On-Site Wastewater Treatment, Kamal Ziad Taha

USF Tampa Graduate Theses and Dissertations

Denitrification experiments using biological cathodes (biocathodes) were conducted in three separate experiments. The first experiment was to observe whether the rate of denitrification in biocathodes could be increased with added ammonium at mass (mg/L) ratios of 0.100 (2.5/25), 0.05 (1.25/25), 0.0250 (0.625/25), and 0.0125 (0.3125/25) (parts ammonium to nitrate (NH4+-N/ NO3--N). The purpose of the ammonium present was to provide the microorganisms a starting nitrogen source for assimilation to biomass which, in theory, would encourage the removal of nitrate through dissimilatory denitrification. As mixed cultures were used, ratios tested were based on simplifying future operation of scaled-up biocathodes applied to …

Intensive Longitudinal Data Analyses And Sample Size Considerations In Intervention Studies With Dynamic Structural Equation Modeling, Zhiyao Yi

USF Tampa Graduate Theses and Dissertations

Dynamic structural equation modeling (DSEM) has been proposed to analyze intensive longitudinal data (ILD). This dissertation provided a tutorial for the DSEM model specification practices in the context of intervention designs. Specifically, I illustrated using equations, verbal descriptions, and figures three two-level DSEM models based on three common intervention designs, including a single-arm trial with repeated measurements before and during intervention, randomized control trial (RCT) with repeated measurements during intervention, and RCT with repeated measurements before and during intervention. Mplus syntax and results from the analysis were also provided for each model along with the interpretations and inferences of parameter …

If At First You Don’T Succeed...Your Coworkers Just Might Be Pleased: A Story Of Workplace Schadenfreude, Kim Johnson

USF Tampa Graduate Theses and Dissertations

Two emotions that employees often experience in the workplace are schadenfreude (a positive reaction to others’ misfortune) and freudenschade (a negative reaction to others’ good fortune). Results of an ANOVA indicate that participants asked to imagine that they are employees were more likely to experience schadenfreude toward a hypothetical coworker if that coworker were arrogant, underperforming, rude, or deceptive. They were more likely to experience freudenschade toward a target when there was an issue involving justice. Results of an ANCOVA illustrated a negative relationship between the experience of schadenfreude and the personality variable Just-World Beliefs, but no association was found …

Managing Off-Grid Power Use For Solar Fueled Residences With Smart Appliances, Prices-To-Devices And Iot, Donnelle L. January

USF Tampa Graduate Theses and Dissertations

Electricity availability has a profound impact in day to day life. Activities such as lighting homes, charging cellphones, and running appliances all depend on electricity use. Around 1 billion people around the world do not have access to electricity, and the majority of these people hail from developing countries in remote areas. Moreover, many of these remote areas lack utility grid access due to the infeasible cost of extending the grid to remote communities. To combat this, various projects on microgrids have been implemented in order to distribute power to these off-grid areas. Nanogrids are defined as “a single domain …

Using Observations From The Uaw-Ford Ergonomic Assessment Tool To Predict Distal Upper Extremity Musculoskeletal Disorders, Zachariah T. Brandes-Powell

USF Tampa Graduate Theses and Dissertations

Distal upper extremity (DUE) musculoskeletal disorders (MSDs) affect thousands of workers annually. Job tasks can have a significant amount of MSD risk depending on the presence of certain risk factors The UAW-Ford Ergonomic Surveillance Tool (EST) is a method specifically designed for the UAW and Ford Motor Company to assess MSD risk in its facilities. The purpose of this report is to evaluate which risk factors in the UAW-Ford EST predict the risk of developing DUE MSDs. Data collected by a previous study on four UAW-Ford automotive manufacturing plants were analyzed. Target jobs were selected based on associated First Time …

Additive Manufactured And Laser Enhanced Optical Fiber On Flexible Kapton Substrate, Dianhao Hou

USF Tampa Graduate Theses and Dissertations

This thesis mainly focuses on the realization of laser enhancing additive manufactured optical fibers on the flexible substrate based on previous work on the rigid surface, and the exploration of their loss at different bend status by optical transmission test. Optical fibers are successfully fabricated using polymethyl methacrylate by fused deposition modeling technology within Norland Optical Adhesive 1369 which is chosen as the cladding material and micro-dispensed on the Kapton substrate. The Laser cutting technology and scanning electron microscope have been used to enhance and characterize the flatness of two end facets of samples, respectively. The optical adhesive and PMMA …