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Graduate Theses and Dissertations

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Full-Text Articles in Physical Sciences and Mathematics

Development Of Next-Generation, Fast, Accurate, Transferable, And Polarizable Force-Fields For Heterogenous Material Simulations, Adam E. Hogan Nov 2020

Development Of Next-Generation, Fast, Accurate, Transferable, And Polarizable Force-Fields For Heterogenous Material Simulations, Adam E. Hogan

Graduate Theses and Dissertations

Theoretical modeling is extremely useful in guiding to experiment; however quantitatively accurate modeling of energy-relevant small molecule sorption at the heterogeneous interfaces present in metal-organic materials (MOMs) is currently challenging. MOMs are an emerging class of materials consisting of inorganic clusters and organic linkers that offer great potential in the areas of gas storage, gas separation, and catalysis due to the possibility of large surface areas, complex heterogeneous surfaces, and rational designability. Efficient chemical separations involving these materials could reduce the US’s total energy consumption by approximately 10 to 15%. In this dissertation, the parameterization of small molecules and ...


Characterizing Childhood And Diet In Migration Period Hungary, Kirsten A. Verostick Nov 2020

Characterizing Childhood And Diet In Migration Period Hungary, Kirsten A. Verostick

Graduate Theses and Dissertations

This project investigates children, childhood and diet of two different Migration Period (4th-8th century AD) populations, the Gepids and the Avars, in the Great Hungarian Plain. The main goal was to assess whether there are differences in treatment of children and differences in breastfeeding and weaning practices in these distinct sites and populations. Secondarily, this research also focused on characterizing diet for the Gepids and the Avars at four different sites from the Migration Period, to understand how the migration and settling into the region and the assimilation of other groups into the two populations affected their ...


Plio-Pleistocene Antarctic Ice-Ocean Interactions In The Ross Sea, Catherine Prunella Nov 2020

Plio-Pleistocene Antarctic Ice-Ocean Interactions In The Ross Sea, Catherine Prunella

Graduate Theses and Dissertations

Warm, intermediate-depth Southern Ocean waters are implicated in recent Antarctic ice mass loss. Direct observations of Antarctic Ice Sheet (AIS) retreat are temporally limited, necessitating paleoceanographic records of ocean-ice interactions during past warm climate intervals. Deepsea and ice-proximal sediments record orbitally-paced glacial-interglacial fluctuations in AIS volume during the Plio-Pleistocene (last 5 million years; Ma), but the total contribution of the AIS and the role of ocean heat in these fluctuations remain unresolved. To address the response of Antarctica’s ice sheets to changing ocean temperatures during the Plio-Pleistocene, International Ocean Discovery Program (IODP) Expedition 374 recovered sediments from the Ross ...


System Support Of Concurrent Database Query Processing On A Gpu, Hao Li Nov 2020

System Support Of Concurrent Database Query Processing On A Gpu, Hao Li

Graduate Theses and Dissertations

The unrivaled computing capabilities of modern GPUs meet the demand of processing massive amounts of data seen in many application domains. While traditional HPC systems support applications as standalone entities that occupy the entire GPU, we propose a GPU-based DBMS (G-DBMS) that can run multiple tasks concurrently. To that end, system-level management mechanisms like resource allocation and buffer manager are needed to build such a concurrent database query processing system and fully unleash the GPUs’ computing power. However, CUDA does not provide enough OS-level functionalities to support it. Thus our research is focusing on implementing the optimization of resource allocation ...


Modeling Early Life: Ontogenetic Growth And Behavior Affect Population Connectivity In Gulf Of Mexico Marine Fish, Kelly Vasbinder Nov 2020

Modeling Early Life: Ontogenetic Growth And Behavior Affect Population Connectivity In Gulf Of Mexico Marine Fish, Kelly Vasbinder

Graduate Theses and Dissertations

This dissertation is an examination of growth, behavior, and dispersal during the early life stages of marine fishes in the Gulf of Mexico. Understanding movements of early life stages is a key part of managing exploited fish populations. Position in the water column can impact larval dispersal, since it determines those currents to which larvae are exposed. First, I investigated the relationship between length and age in early life stages of marine fishes. I found that demersal fish taxa tend to be represented by exponential models, while pelagic fish tend to be represented by linear models. I suggest this may ...


Climate Change And Sustainable Development Within The Tourism Sector Of Small Island Developing States: A Case Study For The Bahamas, Arsum Pathak Nov 2020

Climate Change And Sustainable Development Within The Tourism Sector Of Small Island Developing States: A Case Study For The Bahamas, Arsum Pathak

Graduate Theses and Dissertations

The research literature suggests Small Island Developing States (SIDS) are vulnerable to climate change. Tourism in SIDS is sensitive to climate variations and dependence of the sector on natural resources (beaches, coral reefs) adds to their vulnerability. The purpose of this study is to assess climate impacts and adaptation within the tourism sector of a SIDS – The Bahamas that relies on tourism and faces climate vulnerabilities, as do other SIDS. Given the importance of tourism to their sustainable development by supporting economic growth and employment, this study identifies timely risks and adaptation planning for a tourism-based SIDS economy in the ...


Spontaneous Raman Scattering Enhancement With Microcavities And Multipass Resonators For Trace Gas Detection, Juan Sebastian Gomez Velez Nov 2020

Spontaneous Raman Scattering Enhancement With Microcavities And Multipass Resonators For Trace Gas Detection, Juan Sebastian Gomez Velez

Graduate Theses and Dissertations

The continual increase in production and use of chemicals in an ever-growing field of applications naturally brings forth the necessity to accurately and efficiently measure molecular composition. Spontaneous Raman scattering is a reliable technique which can optically identify molecules based on their intrinsic rotational-vibrational energy structure. The Raman emission from a substance can be spectrally analyzed to detect molecular species simultaneously and with isotopic sensitivity using a single laser source. However, even though the process is non-invasive and effective, the rate at which the emission occurs is notoriously low due to a weak scattering cross-section. Therefore, research into the development ...


The Utilization Of Shared Energy Storage In Energy Systems: Design, Modeling And Optimization, Rui Dai Nov 2020

The Utilization Of Shared Energy Storage In Energy Systems: Design, Modeling And Optimization, Rui Dai

Graduate Theses and Dissertations

Energy storage (ES) plays a significant role in modern smart grids and energy systems. With the advances of ES technologies, efficiently applying ES to energy systems has become the bottleneck for achieving the benefits of ES. The traditional approach of utilizing ES is the so-called distributed framework in which there is a separate ES for each individual user. Due to the inherent limits in the distributed framework such as cost inefficiency and space limitations, many studies have promoted to utilize a shared ES in energy systems to further exploit the potentials of ES. However, current studies always focus on maximizing ...


Discrete Models And Algorithms For Analyzing Dna Rearrangements, Jasper Braun Nov 2020

Discrete Models And Algorithms For Analyzing Dna Rearrangements, Jasper Braun

Graduate Theses and Dissertations

In this work, language and tools are introduced, which model many-to-many mappings that comprise DNA rearrangements in nature. Existing theoretical models and data processing methods depend on the premise that DNA segments in the rearrangement precursor are in a clear one-to-one correspondence with their destinations in the recombined product. However, ambiguities in the rearrangement maps obtained from the ciliate species Oxytricha trifallax violate this assumption demonstrating a necessity for the adaptation of theory and practice.

In order to take into account the ambiguities in the rearrangement maps, generalizations of existing recombination models are proposed. Edges in an ordered graph model ...


Coral Reef Restoration In The Tropical West Atlantic Amid The Covid-19 Pandemic, Linden Cheek Nov 2020

Coral Reef Restoration In The Tropical West Atlantic Amid The Covid-19 Pandemic, Linden Cheek

Graduate Theses and Dissertations

Climate change is increasing threats to coasts, both from storm surge and sea level rise. Healthy coral reefs provide reduction in storm surges, wave energy, coastal flooding and everyday erosion, and are found across a variety of spatial scales. Given the state of coral reefs worldwide, active Coral Reef Restoration (CRR) in emerging as a necessary component of coastal protection. CRR can be classified as a nature-based solutions (NbS) for coastal protection that also provides a multitude of ecosystem-based services to both humans and other life. Nearly all literature on coral restoration efforts assume a steady-state of human-ecological interactions, but ...


Save Water Drink Wine: Challenges Of Implementing The Ethnography Of The Temecula Valley Wine Industry Into Food-Energy-Water Nexus Decision-Making, Zaida E. Darley Nov 2020

Save Water Drink Wine: Challenges Of Implementing The Ethnography Of The Temecula Valley Wine Industry Into Food-Energy-Water Nexus Decision-Making, Zaida E. Darley

Graduate Theses and Dissertations

This study demonstrates the interrelationships of people, food, energy, and water associated with Temecula Valley’s wine industry and reveals contradictions and biases in how people view these resources, which ultimately shape management and policies. The FEW (Food, Energy, and Water) Nexus is an approach increasingly used by policy- and decision-makers to understand the interrelationship of several resources. However, a FEW Nexus approach often lacks in social aspects that influence environmentally and economically sustainable outcomes, especially in the wine and wine tourism industry. When quantitative and qualitative data are available, the other challenge is which assessment to use. Two assessments ...


A Novel Magnetic Respiratory Sensor For Human Healthcare, Kee Young Hwang Nov 2020

A Novel Magnetic Respiratory Sensor For Human Healthcare, Kee Young Hwang

Graduate Theses and Dissertations

Breathing is vital to life. Therefore, the real-time monitoring of a patient’s breathing pattern is crucial to respiratory rehabilitation therapies such as magnetic resonance exams for respiratory-triggered imaging, chronic pulmonary disease treatment, and synchronized functional electrical stimulation. While numerous respiratory devices have been developed, they are often in direct contact with a patient, which can yield inaccurate or limited data. In this study, we developed a novel, non-invasive, and contactless magnetic sensing platform that can precisely monitor a patient’s breathing, movement, or sleep patterns, thus providing efficient monitoring at a clinic or home. A magneto-LC resonance (MLCR) sensor ...


On Some Problems On Polynomial Interpolation In Several Variables, Brian Jon Tuesink Nov 2020

On Some Problems On Polynomial Interpolation In Several Variables, Brian Jon Tuesink

Graduate Theses and Dissertations

Polynomial approximation is a long studied process, with a history dating back to the 1700s, At which time Lagrange, Newton and Taylor developed their famed approximation methods. At that time, it was discovered that every Taylor projection (projector) is the pointwise limit of Lagrange projections. This leaves open a rather large and intriguing question, What happens in several variables?

To this end we define a linear idempotent operator to be an ideal projector whenever its kernel is an ideal. No matter the number of variables, Taylor projections and Lagrange projections are always ideal projectors, and it is well known that ...


Laser-Induced Modifications In Two-Dimensional Materials, Tariq Afaneh Nov 2020

Laser-Induced Modifications In Two-Dimensional Materials, Tariq Afaneh

Graduate Theses and Dissertations

Atomically thin two-dimensional (2D) materials have attracted a growing interest in the lastdecade from the fundamental point of view as well as their potential applications in functional devices. Due to their high surface-to-volume ratio, the physical properties of 2D materials are very sensitive to the environmental factor such as surrounding media and illumination conditions (e.g. light-mater interaction). In the first part of this dissertation I will present recent advances in developing laser-assisted methods to tune the physical properties of 2D transition metal dichalcogenides (TMDs). We demonstrate laser-assisted chemical modification ultrathin TMDs, locally replacing selenium by sulfur atoms. The photo-conversion ...


Analytical Methods And Critical Analyses Supporting Thermodynamically Consistent Characterizations Of The Marine Co2 System, Jonathan D. Sharp Nov 2020

Analytical Methods And Critical Analyses Supporting Thermodynamically Consistent Characterizations Of The Marine Co2 System, Jonathan D. Sharp

Graduate Theses and Dissertations

Chemical equilibria describing the unique behavior of gaseous and ionic forms of dissolved carbon dioxide (CO2) in seawater comprise what is known as the marine CO2 (or carbonate) system. Observations of the marine CO2 system with high degrees of accuracy, reproducibility, spatial coverage, and temporal resolution are critical for evaluating natural cycles of carbon within the Earth system, as well as chemical and biological responses to anthropogenic CO2 emissions.

One component of the CO2 system is the carbonate ion (CO23), a dissolved ion that is produced when carbonic acid (H2CO3 ...


Unifying Security Policy Enforcement: Theory And Practice, Shamaria Engram Nov 2020

Unifying Security Policy Enforcement: Theory And Practice, Shamaria Engram

Graduate Theses and Dissertations

Security policies stipulate restrictions on the behaviors of systems to prevent themfrom behaving in harmful ways. One way to ensure that systems satisfy the constraints of a security policy is through the use of security enforcement mechanisms. To understand the fundamental limitations of such mechanisms, formal methods are employed to prove properties and reason about their behaviors. The particular formalism employed, however, typically depends on the time at which a mechanism operates.

Mechanisms operating before a program's execution are static mechanisms, and mechanisms operating during a program's execution are dynamic mechanisms. Static mechanisms are fundamentally limited in the ...


Digital Identity: A Human-Centered Risk Awareness Study, Toufic N. Chebib Nov 2020

Digital Identity: A Human-Centered Risk Awareness Study, Toufic N. Chebib

Graduate Theses and Dissertations

Cybersecurity threats and compromises have been at the epicenter of media attention; their risk and effect on people’s digital identity is something not to be taken lightly. Though cyber threats have affected a great number of people in all age groups, this study focuses on 55 to 75-year-olds, as this age group is close to retirement or already retired. Therefore, a notable compromise impacting their digital identity can have a major impact on their life.

To help guide this study, the following research question was formulated, “What are the risk perceptions of individuals, between the ages of 55 and ...


The Use Of Spanish Moss As A Biological Indicator To Examine Relationships Between Metal Air Pollution, Vegetation Cover, And Environmental Equity In Tampa, Florida, Yousif Abdullah Nov 2020

The Use Of Spanish Moss As A Biological Indicator To Examine Relationships Between Metal Air Pollution, Vegetation Cover, And Environmental Equity In Tampa, Florida, Yousif Abdullah

Graduate Theses and Dissertations

Studies of inequality in exposure to less common air pollutants, like metals, are often limited by the costs of high spatial resolution measurements. Spanish moss (Tillandsia usneoides) is a promising bioindicator for measuring air pollution due to its lower cost, enabling capture of time-average environmental concentrations at high spatial resolution. This study had three major aims. First, I aimed to use Spanish moss as a bioindicator to characterize ambient concentrations of selected metals (Ti, Cr, Mn, Co, Ni, Cd, Hg, Pb, As, and Sb) in Tampa, Florida. My second goal was to determine the impact of vegetation cover on metals ...


Control Of A Human Arm Robotic Unit Using Augmented Reality And Optimized Kinematics, Carlo Canezo Oct 2020

Control Of A Human Arm Robotic Unit Using Augmented Reality And Optimized Kinematics, Carlo Canezo

Graduate Theses and Dissertations

There are more than 350000 amputees in the US who suffer loss of functionality in their daily living activities, and roughly 100000 of them are upper arm amputees. Many of these amputees use prostheses to compensate part of their lost arm function, including power prostheses. Research on 6-7 degree of freedom powered prostheses is still relatively new, and most commercially available powered prostheses are typically limited to 1 to 3 degrees of freedom. Due to the myriad of possible options for various powered protheses from different manufacturers, each configuration is governed by a distinct control scheme typically specific to the ...


The Quantification Of Heavy Metals In Infant Formulas Offered By The Florida Wic Program, Naya Martin Oct 2020

The Quantification Of Heavy Metals In Infant Formulas Offered By The Florida Wic Program, Naya Martin

Graduate Theses and Dissertations

Many infants rely on the WIC program to provide their main source of sustenance in theform of infant formula. In 2016, about 86% of the eligible infant population participated in this program. Infants in Florida account for about 30% of participation in the Southeast. For this reason, it is necessary to ensure that the formulas offered by this program provide the best opportunity for an optimal health outcome.

Exposure to heavy metals can have detrimental effects on the development of infants and children. Arsenic, lead, and cadmium specifically have been commonly found in certain types of infant formulas. Significant exposures ...


Humanistic Climate Philosophy: Erich Fromm Revisited, Nicholas Dovellos Oct 2020

Humanistic Climate Philosophy: Erich Fromm Revisited, Nicholas Dovellos

Graduate Theses and Dissertations

Given the current juncture in history, humanity is faced with the herculean task of adapting to a tumultuous present and a gimmer future. Should climate projections be accurate, there is little time to waste. This work makes the claim that we are not only in a political gridlock but also in an academic one. Researching climate philosophy from its inception, the concluding view is that no major progress, outside of a standardized descriptive analysis, has been achieved. Thus, the work evaluates an array of climate philosophers e.g. Stephen Gardiner, James Garvey, Peter Singer, Walter Sinnott-Armstrong, etc., with specific emphasis ...


Using Geospatial Data To Predict The Locations Of Groundwater Discharge To Salmon-Bearing Streams, Alaska, Mary Gerlach Oct 2020

Using Geospatial Data To Predict The Locations Of Groundwater Discharge To Salmon-Bearing Streams, Alaska, Mary Gerlach

Graduate Theses and Dissertations

Identification and protection of groundwater resources are considerations of increasing interest as climate shifts but can be challenging to accomplish in remote areas. To that end, a series of GIS techniques and weight of evidence approach were applied to determine the feasibility of remotely identifying likely areas of ground discharge. Through the confluence of topographic analyses and a novel geologic dataset, these techniques were found to consistently identify areas characterized by either shallow subsurface or aquifer-fed groundwater discharge or evidence of ephemeral surficial water features. Two distinct GIS techniques to build spatial proxies of the effects of topography and geology ...


Optimal Strategies For Grassland Restoration To Increase Spatial Carrying Capacity Of Florida Sandhill Cranes In Pasco County, Florida, Ibrahim Kaya Oct 2020

Optimal Strategies For Grassland Restoration To Increase Spatial Carrying Capacity Of Florida Sandhill Cranes In Pasco County, Florida, Ibrahim Kaya

Graduate Theses and Dissertations

The Florida sandhill crane (Antigone canadensis pratensis) is a non-migratory bird species occurring throughout the Florida peninsula and the Okefenokee Swamp in southeastern Georgia. Human land-altering activities have led to a substantial decline in the amount and condition of suitable habitat, including grasslands, for the species in Florida, thereby decreasing the population size significantly. Grasslands located in close proximity to nesting locations are one of the habitat types on which the population viability of the species depends, as they provide foraging and brooding habitat which is crucial for successful reproduction. The purpose of this study is to propose the most ...


Numerical Study Of Gap Distributions In Determinantal Point Process On Low Dimensional Spheres: L-Ensemble Of O(N) Model Type For N = 2 And N = 3, Xiankui Yang Oct 2020

Numerical Study Of Gap Distributions In Determinantal Point Process On Low Dimensional Spheres: L-Ensemble Of O(N) Model Type For N = 2 And N = 3, Xiankui Yang

Graduate Theses and Dissertations

Poisson point process is the most well-known point process with many applications. Unlike Poisson point process, which is the random set of non-intersecting points, determinantal point process refers to certain class of point processes where the points tend to interact with each other. The interaction often leads to more uniformly distributed points compared to those in Poisson point process.

In this article, we study the gap distribution of certain class of determinantal point process, L-ensemble of O(n) model type, and compare the distribution with the ones from the other known determinantal point process that appears in random matrices. Our ...


Current And Projected Sustainability Of The Water-Energy-Food Nexus In Caribbean Small Island Developing States, Zachary S. Winters Oct 2020

Current And Projected Sustainability Of The Water-Energy-Food Nexus In Caribbean Small Island Developing States, Zachary S. Winters

Graduate Theses and Dissertations

Within Latin American and the Caribbean (LAC), small island developing states (SIDS) of the latter are wholly reliant on their natural environments for their tourism-dependent economies yet are experiencing declining environmental health. These effects are exacerbated by Caribbean susceptibility to climate change and growing populations. With limited size, elevation, GDP, and water resources compared to Latin America, the subregion requires management and solutions tailored to the needs of each country. This study examined current and future sustainability of the Caribbean SIDS by assessing the nexus of water-energy-food (WEF) resources at the national level. In addition, the potential for nature-based solutions ...


Design, Synthesis Of Axial Chiral Triazole, Jing Wang Oct 2020

Design, Synthesis Of Axial Chiral Triazole, Jing Wang

Graduate Theses and Dissertations

This thesis contains three parts: 1) The briefly review of chiral P, N-ligands. 2) The summary of triazole as ligands. 3) The attempt of designing, synthesizing the chiral triazole ligands.

In the first part, we have reviewed all the major P, N-ligands in the history, including how they were synthesized and resolved into single enantiomer. We also used some examples to show their utility potential in different reactions.

In the second part, we summarized the triazole ligands which mainly developed by our group including their structures, their potential and utility in different types of chemical reactions.

In the last part ...


Detecting Symptoms Of Chronic Obstructive Pulmonary Disease And Congestive Heart Failure Via Cough And Wheezing Sounds Using Smart-Phones And Machine Learning, Anthony Windmon Sep 2020

Detecting Symptoms Of Chronic Obstructive Pulmonary Disease And Congestive Heart Failure Via Cough And Wheezing Sounds Using Smart-Phones And Machine Learning, Anthony Windmon

Graduate Theses and Dissertations

Chronic Obstructive Pulmonary Disease (COPD) and Congestive Heart Failure (CHF) are progressive disorders, and major health concerns among today’s aging population. COPD causes a large mucus buildup in the lungs, leading to chronic cough and difficulty to breathe. CHF causes fluid buildup in the lower lungs due to the failing heart, causing cough and difficulty to breath. People who are clinically diagnosed with COPD or CHF are expected to regularly monitor their symptoms and follow complex medical recommendations in an effort to prevent exacerbation. In this dissertation, we elaborate upon three different machine learning based techniques that we developed ...


Feature Selection Via Random Subsets Of Uncorrelated Features, Long Kim Dang Sep 2020

Feature Selection Via Random Subsets Of Uncorrelated Features, Long Kim Dang

Graduate Theses and Dissertations

The role of feature selection is crucial in many applications. A few of these include computational biology, image classification and risk management. In biology, gene expression micro array data sets have been used extensively in many areas of research. These data sets typically suffer from an important problem: the ratio between the number of features over the number of examples is very high. This problem mainly affects prediction accuracy because it is best to collect more labeled examples than features. A correlation based random subspace ensemble feature selector (CCC_RSM) was proposed to handle this problem [5]. In this approach, first ...


Establishing Topological Data Analysis: A Comparison Of Visualization Techniques, Tanmay J. Kotha Sep 2020

Establishing Topological Data Analysis: A Comparison Of Visualization Techniques, Tanmay J. Kotha

Graduate Theses and Dissertations

When visualizing data, we would like to convey both the data and the uncertainty associated with it. There are many incentives to do this, ranging from hurricane path projection to geographical surveys. Important decision making tasks rely upon humans perceiving a clear picture of the data and having confidence in their decisions. Topological Data Analysis has the potential to visualize the data as features or hierarchies in ways that are familiar to human intuition, and thus could help us convey the variation associated with uncertainty.

In this thesis, we evaluate four visualization techniques: color maps, isocontours, Reeb graphs, and persistence ...


Soil Characteristics Associated With Horse Cases Of Eastern Equine Encephalitis Virus In Florida, Fulya Guzelkucuk Aug 2020

Soil Characteristics Associated With Horse Cases Of Eastern Equine Encephalitis Virus In Florida, Fulya Guzelkucuk

Graduate Theses and Dissertations

Eastern Equine Encephalitis virus (EEEV) is a mosquito-borne virus found in Florida that affects humans and horses. Also, EEEV is an agricultural land management issue in Florida, as it causes mortality in large numbers of horses each year and sometimes humans. This study investigates the characteristics of soils associated with horse cases of EEEV in the State of Florida, focusing on differences in soil characteristics between summer and winter cases. This study analyzed a total of 676 EEEV cases during 2005-2018, including 611 summer cases and 65 winter cases. Soil characteristics that were examined include: soil texture, drainage class, hydrology ...