Digital Commons Network^™

Development Of Ethologically-Based Inhibitory Avoidance Models Of Fear Memory, Savannah Dalrymple

USF Tampa Graduate Theses and Dissertations

Translational research provides a unique opportunity to investigate innate and conditioned fear to develop an integrated understanding of anxiety disorders, ultimately improving treatment for those afflicted. Many fear conditioning paradigms use physically aversive stimuli to induce fear but ethological stimuli may better represent psychological disorders from a translational standpoint. Natural predators and immobilization have been successful in inducing both innate and contextually conditioned fear in rodents but an inhibitory avoidance paradigm that uses ethologically relevant stimuli has yet to be developed. To expand the use of these stimuli into inhibitory avoidance conditioning, an inhibitory avoidance paradigm was developed to include …

Quantifying And Modeling Surface Inflow And Groundwater Infiltration Into Sanitary Sewers In Southern Pinellas County, Fl, Megan E. Long

USF Tampa Graduate Theses and Dissertations

Following large rain events, excess flow in sanitary sewers from inflow and infiltration (I/I) cause sanitary sewer overflows (SSO), resulting in significant problems for Pinellas County and the Tampa Bay area. Stormwater enters the sanitary sewers as inflow from improper or illegal surface connections, and groundwater enters the system as infiltration through cracks in subsurface infrastructure. This pilot study was designed to develop methods to separate and quantify the components of I/I and to build a predictive model using flowmeter and rainfall data.

To identify surface inflow, daily wastewater production and groundwater infiltration patterns were filtered from the flow data, …

Lost In The Crowd: Are Large Social Graphs Inherently Indistinguishable?, Subramanian Viswanathan Vadamalai

USF Tampa Graduate Theses and Dissertations

Real social graphs datasets are fundamental to understanding a variety of phenomena, such as epidemics, crowd management and political uprisings, yet releasing digital recordings of such datasets exposes the participants to privacy violations. A safer approach to making real social network topologies available is to anonymize them by modifying the graph structure enough as to decouple the node identity from its social ties, yet preserving the graph characteristics in aggregate. At scale, this approach comes with a significant challenge in computational complexity.

This thesis questions the need to structurally anonymize very large graphs. Intuitively, the larger the graph, the easier …

Predictive Analytics In Cardiac Healthcare And 5g Cellular Networks, Dilranjan S. Wickramasuriya

USF Tampa Graduate Theses and Dissertations

This thesis proposes the use of Machine Learning (ML) to two very distinct, yet compelling, applications – predicting cardiac arrhythmia episodes and predicting base station association in 5G networks comprising of virtual cells. In the first scenario, Support Vector Machines (SVMs) are used to classify features extracted from electrocardiogram (EKG) signals. The second problem requires a different formulation departing from traditional ML classification where the objective is to partition feature space into constituent class regions. Instead, the intention here is to identify temporal patterns in unequal-length sequences. Using Recurrent Neural Networks (RNNs), it is demonstrated that accurate predictions can be …

Validity Of A New Measure Of Phonemic Awareness That Does Not Require Spoken Responses In Children With Complex Communication Needs, Tiffany Chavers

USF Tampa Graduate Theses and Dissertations

Children with complex communication needs (CCN) routinely have difficulty attaining appropriate literacy skills. Two indicators of literacy development are the alphabetic principle and phonemic awareness (Byrne & Fielding-Barnsley, 1989). The acquisition of minimal literacy skills such as letter sound knowledge can give children with CCN the opportunity to communicate and generate their own messages, instead of being reliant on vocabulary provided by others. In order to identify appropriate intervention approaches, nonverbal assessments of phonological and phonemic awareness for individuals with CCN are needed.

The purpose of this study was to determine the reliability of the Dynamic Assessment of the Alphabetic …

Functional Trade-Offs In Feeding Performance In Salamanders Of The Family Salamandridae, Charlotte M. Stinson

USF Tampa Graduate Theses and Dissertations

Performance is an organism’s ability to accomplish a particular task or behavior, and morphology can have a major impact on the performance of an organism. Salamanders are ecologically diverse and can feed using a variety of behaviors depending on the environment in which feeding occurs. Feeding is accomplished through the use of the hyobranchial apparatus, which lies along the oropharynx, and this structure can have competing roles; in aquatic environments the apparatus is used for suction feeding and works to depress the floor of the mouth, but during terrestrial feeding this structure projects the tongue forward out of the mouth. …

Influence Of Environmental Parameters On Mold Sampling Results, Benjamin Fishman

USF Tampa Graduate Theses and Dissertations

Mold is a type of fungus present in nearly all environments. Mold thrives under several environmental parameters such as high humidity and an adequate food source. A professional, such as an industrial hygienist, can measure mold in indoor and outdoor environments. Industrial hygienists commonly use a cascade impactor with a culture plate to capture air within a sampling area. While collecting air samples, environmental parameters such as temperature, humidity, and carbon dioxide are recorded. A laboratory then cultures and analyzes the samples, identifying the types and amounts of viable mold found in the sampling area.

In this study, a data …

Multi-Scale Spatial Cognition Models And Bio-Inspired Robot Navigation, Martin I. Llofriu Alonso

USF Tampa Graduate Theses and Dissertations

The rodent navigation system has been the focus of study for over a century. Discoveries made lately have provided insight on the inner workings of this system. Since then, computational approaches have been used to test hypothesis, as well as to improve robotics navigation and learning by taking inspiration on the rodent navigation system.

This dissertation focuses on the study of the multi-scale representation of the rat’s current location found in the rat hippocampus. It first introduces a model that uses these different scales in the Morris maze task to show their advantages. The generalization power of larger scales of …

Deployment, Post-Traumatic Stress Disorder And Hypertensive Disorders Of Pregnancy Among U.S. Active-Duty Military Women, Michelle C. Nash

USF Tampa Graduate Theses and Dissertations

Introduction. Today women comprise 15% of the U.S. active-duty military, but are often overlooked in research of the Armed Forces. While some of the challenges faced by women are similar to men, they encounter unique stressors related to childcare while deployed, sexual harassment and assault, and gynecological needs. Women are also more likely than men to develop post-traumatic stress disorder (PTSD). Both stress and PTSD have been linked to the development of chronic hypertension and some adverse birth outcomes. We hypothesized that post-9/11/2001 era military women who deployed or who had indicators of PTSD would be at greater risk of …

Effects Of Temperature On The Emission Rate Of Formaldehyde From Medium Density Fiberboard In A Controlled Chamber, William Swankie

USF Tampa Graduate Theses and Dissertations

Formaldehyde is a colorless gas that is found naturally in the environment. It is a popular additive in many consumer products including composite wood products. Composite wood products are engineered wood panels produced from pressing pieces, chips, particles, or fibers of wood together at high temperatures held together with a bonding agent. This bonding agent is often formaldehyde-containing resins that are known to release formaldehyde over time. This is concerning because of the carcinogenic classification of formaldehyde, the wide spread application of composite wood products, and the increasing amount of time spent in the indoor environment.

In a controlled 0.53 …

Enhanced Visible Light Photocatalytic Remediation Of Organics In Water Using Zinc Oxide And Titanium Oxide Nanostructures, Srikanth Gunti

USF Tampa Graduate Theses and Dissertations

The techniques mostly used to decontaminate air as well as water pollutants have drawbacks in terms of higher costs, require secondary treatment, and some methods are very slow. So, emphasis has been given to water though the use of photocatalysts, which break organic pollutants to water and carbon dioxide and leave no trace of by-products at the end. Photocatalytic remediation aligns with the waste and wastewater industries’ zero waste schemes with lower cost, eco-friendly and sustainable treatment technology. The commonly used photocatalysts such as titanium oxide (TiO₂), zinc oxide (ZnO), tungsten oxide (WO₃) have band gap …

The Development Of A Platform Interface With The Use Of Virtual Reality To Enhance Upper-Extremity Prosthetic Training And Rehabilitation, Ashley D. Knight

USF Tampa Graduate Theses and Dissertations

This dissertation focuses on the investigation and development of an effective prosthetic training and rehabilitation platform with the use of virtual reality to facilitate an effective process to return amputees to the highest level of independence and functioning possible.

It has been reported that approximately 10 million people live with a limb loss worldwide, with around 30% being an upper-extremity amputee. The sudden loss of a hand or arm causes the loss of fine, coordinated movements, reduced joint range of motion (ROM), proprioceptive feedback and aesthetic appearance, all which can be improved with the use of a prosthesis and proper …

Predictors Of Behavior Problems In The Context Of Peer Play Interactions: A Sample Of Low-Income Latino Preschoolers, Olivia Hernandez Gonzalez

USF Tampa Graduate Theses and Dissertations

Latinos are the fastest-growing minority group in the United States and have higher dropout rates compared to other groups. Moreover, problem behaviors are common in preschool classrooms, and the incidence of these problems is higher for children from low-income families. The purpose of this study was to understand Latino children's problem behaviors in the context of peer play interactions and identify those variables that influence such behavior. 265 five and six-year-old Spanish-speaking children (53.6% female) attending Head Start or kindergarten participated in the study. Additionally, 198 mothers and 78 pre-kindergarten and kindergarten lead teachers participated in the study. Child level …

To Tell The Truth: The Credibility Of Cable News Networks In An Era Of Increasingly Partisan Political News Coverage, Christopher Jadick

USF Tampa Graduate Theses and Dissertations

The credibility of the American news media is increasingly under fire. Despite an exponential expansion of information available in the digital media era, increased political news coverage and commentary has brought growing apprehension over how much of today’s news can be trusted and believed. 24-hour cable news channels are among the media most often subject to this criticism. At the same time, the media operates under First Amendment freedom of press protection, a constitutional guarantee granted with the understanding that democracy can only succeed when its citizens are well informed. In the great experiment of our republic, a freely functioning …

Real-Time Classification Of Biomedical Signals, Parkinson’S Analytical Model, Abolfazl Saghafi

USF Tampa Graduate Theses and Dissertations

The reach of technological innovation continues to grow, changing all industries as it evolves. In healthcare, technology is increasingly playing a role in almost all processes, from patient registration to data monitoring, from lab tests to self-care tools. The increase in the amount and diversity of generated clinical data requires development of new technologies and procedures capable of integrating and analyzing the BIG generated information as well as providing support in their interpretation.

To that extent, this dissertation focuses on the analysis and processing of biomedical signals, specifically brain and heart signals, using advanced machine learning techniques. That is, the …

“Can You Believe They Think I’M Intimidating?” An Exploration Of Identity In Tall Women, Elizabeth Joy Fuller

USF Tampa Graduate Theses and Dissertations

In the United States today, there is a dominant cultural narrative telling us that tallness is desirable and enjoyed by those who experience it. Much of the existing research on height correlates tallness with promotions, higher salaries, and general happiness. However, this research does not take into account the limitations of some of the previous research which tends to accept tall people’s vocabulary of motives at face value as the totality of their experience as a tall person. In particular, tall women tend to have much more to say about their lives as tall women than simply that it has …

Parsing The Influences Of Nicotine And Expectancies On The Acute Effects Of E-Cigarettes: A Balanced-Placebo Experiment, Amanda M. Palmer

USF Tampa Graduate Theses and Dissertations

E-cigarette use has been increasing in recent years, and its ultimate public health impact is still unknown. In order to assess the addictive liability of these products, research is needed to investigate the roles of nicotine and other factors on psychological and physical effects of “vaping.” The goal of the current study was to investigate the role of expectancies, nicotine delivery, and their interactions on the effects of e-cigarette use via a balanced-placebo experiment. In this design, drug dosage (contains nicotine or not) was crossed with instructions (told nicotine or non-nicotine) during ad-lib e-cigarette use sessions by 128 current e-cigarette …

The Ability Of An Aquatic Invader To Uptake Nutrients In An Upstream Estuarine Environment: Implications For Reducing The Intensity And Frequency Of Massive Fish Kills In Florida, Melissa L. Kerr

USF Tampa Graduate Theses and Dissertations