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Psychometric Properties Of A Working Memory Span Task, Juan M. Alzate Vanegas Jan 2018

Psychometric Properties Of A Working Memory Span Task, Juan M. Alzate Vanegas

Honors Undergraduate Theses

The intent of this thesis is to examine the psychometric properties of a complex span task (CST) developed to measure working memory capacity (WMC) using measurements obtained from a sample of 68 undergraduate students at the University of Central Florida. The Grocery List Task (GLT) promises several design improvements over traditional CSTs in a prior study about individual differences in WMC and distraction effects on driving performance, and it offers potential benefits for studying WMC as well as the serial-position effect. Currently, the working memory system is composed of domain-general memorial storage processes and information-processing, which involves the use of …

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Climate Modeling, Outgoing Longwave Radiation, And Tropical Cyclone Forecasting, Thomas Rechtman Jan 2018

Climate Modeling, Outgoing Longwave Radiation, And Tropical Cyclone Forecasting, Thomas Rechtman

Honors Undergraduate Theses

Climate modeling and tropical cyclone forecasting are two significant is- sues that are continuously being improved upon for more accurate weather forecasting and preparedness. In this thesis, we have studied three climate models and formulated a new model with a view to determine the outgoing longwave radiation (OLR) budget at the top of the atmosphere (TOA) as ob- served by the National Oceanic and Atmospheric Administration’s (NOAA) satellite based Advanced Very High Resolution Radiometer (AVHRR). In 2006, Karnauskas proposed the African meridional OLR as an Atlantic hur- ricane predictor, the relation was further proven in 2016 by Karnauskas and Li …

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Mathematical Models Of Mosquito Populations, Hanna Reed Jan 2018

Mathematical Models Of Mosquito Populations, Hanna Reed

Honors Undergraduate Theses

The intent of this thesis is to develop ordinary differential equation models to better understand the mosquito population. We first develop a framework model, where we determine the condition under which a natural mosquito population can persist in the environment. Wolbachia is a bacterium which limits the replication of viruses inside the mosquito which it infects. As a result, infecting a mosquito population with Wolbachia can decrease the transmission of viral mosquito-borne diseases, such as dengue. We develop another ODE model to investigate the invasion of Wolbachia in a mosquito population. In a biologically feasible situation, we determine three coexisting …

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The Spatial Distribution Of Tumuli In The Iron Age Kanak Su Basin, Turkey, Paige Paulsen Jan 2018

The Spatial Distribution Of Tumuli In The Iron Age Kanak Su Basin, Turkey, Paige Paulsen

Electronic Theses and Dissertations

This project takes the Iron Age tumuli of the Kanak Su Basin in Yozgat, Turkey as a case study for the application of geospatial methods to reconstruct past perceptions of a mortuary landscape. The tumulus fields – landscapes heavily modified by monumental burial mounds – of central Anatolia present an opportunity to investigate how burial practices reflect and create places of collective memory, territorial identity, and the social order. Understanding the nature of Iron Age settlement in the Kanak Su Basin remains an ongoing subject of study in central Anatolian archaeology, especially in regard to how the large, short-lived city …

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Hilbert Series Of Graphs, Hypergraphs, And Monomial Ideals, Kyle Trainor Jan 2018

Hilbert Series Of Graphs, Hypergraphs, And Monomial Ideals, Kyle Trainor

Electronic Theses and Dissertations

In this dissertation, identities for Hilbert series of quotients of polynomial rings by monomial ideals are explored, beginning in the contexts of graph and hypergraph rings and later generalizing to general monomial ideals. These identities are modeled after constructive identities from graph theory, and can thus be used to construct Hilbert series iteratively from those of smaller algebraic structures.

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Reflectance Transformation Imaging: Documenting Graffiti In The Maya Lowlands, Rachel Gill Jan 2018

Reflectance Transformation Imaging: Documenting Graffiti In The Maya Lowlands, Rachel Gill

Electronic Theses and Dissertations

In the late 19th century, explorers identified graffiti etched in stucco walls of residences, palaces, and temples in the Maya Lowlands. By the mid-20th century, scholars acknowledged that the ancient Maya produced these incised images. Today, archaeologists struggle with documenting these instances of graffiti with precision and accuracy, often relying solely on to-scale line drawings to best represent the graffitied image they see before them. These images can be complex, multilayered, and difficult to see so identifying the sequence of creation of the incisions can be challenging. Reflectance Transformation Imaging (RTI) is a method that uses a moving light source …

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Masquerading Techniques In Ieee 802.11 Wireless Local Area Networks, Omar Nakhila Jan 2018

Masquerading Techniques In Ieee 802.11 Wireless Local Area Networks, Omar Nakhila

Electronic Theses and Dissertations

The airborne nature of wireless transmission offers a potential target for attackers to compromise IEEE 802.11 Wireless Local Area Network (WLAN). In this dissertation, we explore the current WLAN security threats and their corresponding defense solutions. In our study, we divide WLAN vulnerabilities into two aspects, client, and administrator. The client-side vulnerability investigation is based on examining the Evil Twin Attack (ETA) while our administrator side research targets Wi-Fi Protected Access II (WPA2). Three novel techniques have been presented to detect ETA. The detection methods are based on (1) creating a secure connection to a remote server to detect the …

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Mechanism Design Of A Compact 4-Dof Robotic Needle Guide For Mri-Guided Prostate Intervention, Shihao Zhang Jan 2018

Mechanism Design Of A Compact 4-Dof Robotic Needle Guide For Mri-Guided Prostate Intervention, Shihao Zhang

Electronic Theses and Dissertations

In the past several MRI compatible robotic needle guide devices for targeted prostate biopsy have been developed. The large and complex structure have been identified as the major limitations of those devices. Such limitations, in addition to complex steps for device to image registration have prevented widespread implementation of MRI-guided prostate biopsy despite the advantages of MRI compared to TRUS. We have designed a compact MRI-guided robotic intervention with the capability to have angulated insertion to avoid damage to any anatomical feature along the needle path. The system consists of a novel mechanism driven Robotic Needle Guide (RNG). The RNG …

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A Phenomenological Study Of The Experiences Of Successful Women In Science Fields, Jonathan Hall Jan 2018

A Phenomenological Study Of The Experiences Of Successful Women In Science Fields, Jonathan Hall

Electronic Theses and Dissertations

Girls and women face several forms of gender-based biases and discrimination in the science community. These issues create difficult circumstances for them to develop positive science identities. Since these difficult circumstances exist, science education and sociology researchers have used a deficit model to learn about their experiences, achievements, and attitudes. Understanding the experiences of successful women in science offers insight into how women can navigate the challenges presented by the science community and how science educators can support them. However, research studies that explore the experiences of successful women in science are scant. Therefore, the objective of this study was …

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In Quest Of Bernstein Inequalities Rational Functions, Askey-Wilson Operator, And Summation Identities For Entire Functions, Rajitha Puwakgolle Gedara Jan 2018

In Quest Of Bernstein Inequalities Rational Functions, Askey-Wilson Operator, And Summation Identities For Entire Functions, Rajitha Puwakgolle Gedara

Electronic Theses and Dissertations

The title of the dissertation gives an indication of the material involved with the connecting thread throughout being the classical Bernstein inequality (and its variants), which provides an estimate to the size of the derivative of a given polynomial on a prescribed set in the complex plane, relative to the size of the polynomial itself on the same set. Chapters 1 and 2 lay the foundation for the dissertation. In Chapter 1, we introduce the notations and terminology that will be used throughout. Also a brief historical recount is given on the origin of the Bernstein inequality, which dated back …

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Tuning Chemical And Optical Properties Of Nanomaterials: From Extended Surfaces To Finite Nanoclusters, Zahra Hooshmand Gharehbagh Jan 2018

Tuning Chemical And Optical Properties Of Nanomaterials: From Extended Surfaces To Finite Nanoclusters, Zahra Hooshmand Gharehbagh

Electronic Theses and Dissertations

Modifying the electronic and optical properties of surfaces and nanostructures are in the forefront of surface science. This dissertation's focus is on this problem. The first part is on the adsorption of functionalized naphthalene molecules on Cu(111) surface. The results show that changing the functional group results in modification of charge redistribution at the interface of molecule and surface and the electronic structure of Cu changes. The second part discusses the new Moire structure of h-BN on Rh(111) induced by intrinsic carbon impurities of Rh single crystals. We found that these impurities intercalate between h-BN and Rh(111) with new local …

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Examining Followership Role Orientation, Douglas Monsky Jan 2018

Examining Followership Role Orientation, Douglas Monsky

Electronic Theses and Dissertations

This study attempts to make steps toward filling significant gaps in the followership literature. The study of followership has often been seen through the lens of leaders' ability to impart change in follower behavior. In doing so, the literature has primarily focused on leader behavior as the agent of change rather than acknowledging followers as active agents in their own behaviors. However, some recent research has shown the emergence of followers as the primary focus, even looking at how their actions can change the way leaders act. This research focuses primarily on followership role orientations as mental models which specify …

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Cavity-Coupled Plasmonic Systems For Enhanced Light-Matter Interactions, Abraham Vazquez-Guardado Jan 2018

Cavity-Coupled Plasmonic Systems For Enhanced Light-Matter Interactions, Abraham Vazquez-Guardado

Electronic Theses and Dissertations

Light-matter interaction is a pivotal effect that involves the synergetic interplay of electromag- netic fields with fundamental particles. In this regard localized surface plasmons (LSP) arise from coherent interaction of the electromagnetic field with the collective oscillation of free electrons in confined sub-wavelength environments. Their most attractive properties are strong field en- hancements at the near field, highly inhomogeneous, peculiar temporal and spatial distributions and unique polarization properties. LSP systems also offer a unique playground for fundamental electromagnetic physics where micro-scale systemic properties can be studied in the macro-scale. These important properties and opportunities are brought up in this work …

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Advancing Practical Specification Techniques For Modern Software Systems, John Singleton Jan 2018

Advancing Practical Specification Techniques For Modern Software Systems, John Singleton

Electronic Theses and Dissertations

The pervasive nature of software (and the tendency for it to contain errors) has long been a concern of theoretical computer scientists. Many investigators have endeavored to produce theories, tools, and techniques for verifying the behavior of software systems. One of the most promising lines of research is that of formal specification, which is a subset of the larger field of formal methods. In formal specification, one composes a precise mathematical description of a software system and uses tools and techniques to ensure that the software that has been written conforms to this specification. Examples of such systems are Z …

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Necessary Conditions For Open-Ended Evolution, Lisa Soros Jan 2018

Necessary Conditions For Open-Ended Evolution, Lisa Soros

Electronic Theses and Dissertations

Evolution on Earth is widely considered to be an effectively endless process. Though this phenomenon of open-ended evolution (OEE) has been a topic of interest in the artificial life community since its beginnings, the field still lacks an empirically validated theory of what exactly is necessary to reproduce the phenomenon in general (including in domains quite unlike Earth). This dissertation (1) enumerates a set of conditions hypothesized to be necessary for OEE in addition to (2) introducing an artificial life world called Chromaria that incorporates each of the hypothesized necessary conditions. It then (3) describes a set of experiments with …

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The Nfl As A Mega-Crisis: Applications Of Fractal Theory, Cory Young, Terry Rentner Jan 2018

The Nfl As A Mega-Crisis: Applications Of Fractal Theory, Cory Young, Terry Rentner

International Crisis and Risk Communication Conference

The National Football League (NFL) is facing a reputation crisis—a serious problem for a powerhouse institution that airs its Super Bowl in 180 countries. Public and media scrutiny for its handling of domestic abuse cases and denial of concussions leading to Chronic Traumatic Encephalopathy (CTE) have left the NFL with a mega-crisis. Television ratings are down, player injuries are up, and fewer youth are participating in the sport. This research, presented at the International Crisis and Risk Communication conference, addresses the CTE and domestic abuse scandals in the NFL and details the League’s responses to both high-profile cases. We provide …

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On Saturation Numbers Of Ramsey-Minimal Graphs, Hunter M. Davenport Jan 2018

On Saturation Numbers Of Ramsey-Minimal Graphs, Hunter M. Davenport

Honors Undergraduate Theses

Dating back to the 1930's, Ramsey theory still intrigues many who study combinatorics. Roughly put, it makes the profound assertion that complete disorder is impossible. One view of this problem is in edge-colorings of complete graphs. For forbidden graphs H1,...,Hk and a graph G, we write G "arrows" (H1,...,Hk) if every k-edge-coloring of G contains a monochromatic copy of Hi in color i for some i=1,2,...,k. If c is a (red, blue)-edge-coloring of G, we say c is a bad coloring if G contains no red K3or blue K …

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An Exploration Of Song As A Strategy To Engage Elementary Students During Social Studies Lessons, Morgan Rome Jan 2018

An Exploration Of Song As A Strategy To Engage Elementary Students During Social Studies Lessons, Morgan Rome

Honors Undergraduate Theses

The purpose of this thesis is to explore how curriculum-related songs provide an engaging atmosphere for elementary students learning social studies concepts. The investigation done for this thesis examines the resources available to teachers in terms of songs to be used for pedagogical engagement of social studies lessons. Through research and video analyzations it can be concluded that students are overall intrigued by the usage of songs in their social studies lessons. During the social studies lessons observed in the video analyzations, the elementary students are focused, exhibit positive body language, participate, and have fun. Since engagement is documented within …

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I’M Being Framed: Phase Retrieval And Frame Dilation In Finite-Dimensional Real Hilbert Spaces, Jason L. Greuling Jan 2018

I’M Being Framed: Phase Retrieval And Frame Dilation In Finite-Dimensional Real Hilbert Spaces, Jason L. Greuling

Honors Undergraduate Theses

Research has shown that a frame for an n-dimensional real Hilbert space offers phase retrieval if and only if it has the complement property. There is a geometric characterization of general frames, the Han-Larson-Naimark Dilation Theorem, which gives us the necessary and sufficient conditions required to dilate a frame for an n-dimensional Hilbert space to a frame for a Hilbert space of higher dimension k. However, a frame having the complement property in an n-dimensional real Hilbert space does not ensure that its dilation will offer phase retrieval. In this thesis, we will explore and provide what necessary and sufficient …

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Hopf Bifurcation Analysis Of Chaotic Chemical Reactor Model, Daniel Mandragona Jan 2018

Hopf Bifurcation Analysis Of Chaotic Chemical Reactor Model, Daniel Mandragona

Honors Undergraduate Theses

Bifurcations in Huang's chaotic chemical reactor system leading from simple dynamics into chaotic regimes are considered. Following the linear stability analysis, the periodic orbit resulting from a Hopf bifurcation of any of the six fixed points is constructed analytically by the method of multiple scales across successively slower time scales, and its stability is then determined by the resulting final secularity condition. Furthermore, we run numerical simulations of our chemical reactor at a particular fixed point of interest, alongside a set of parameter values that forces our system to undergo Hopf bifurcation. These numerical simulations then verify our analysis of …

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Optimal Sintering Temperature Of Ceria-Doped Scandia Stabilized Zirconia For Use In Solid Oxide Fuel Cells, Amanda K. Assuncao Jan 2018

Optimal Sintering Temperature Of Ceria-Doped Scandia Stabilized Zirconia For Use In Solid Oxide Fuel Cells, Amanda K. Assuncao

Honors Undergraduate Theses

Carbon emissions are known to cause decay of the Ozone layer in addition to creating pollutant, poisonous air. This has become a growing concern among scientists and engineers across the globe; if this issue is not addressed, it is likely that the Earth will suffer catastrophic consequences. One of the main culprits of these harmful carbon emissions is fuel combustion. Between vehicles, power plants, airplanes, and ships, the world consumes an extraordinary amount of oil and fuel which all contributes to the emissions problem. Therefore, it is crucial to develop alternative energy sources that minimize the impact on the environment. …

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Polyelectrolyte Complexes Based On Poly(Acrylic Acid): Mechanics And Applications, Xiaoyan Lu Jan 2018

Polyelectrolyte Complexes Based On Poly(Acrylic Acid): Mechanics And Applications, Xiaoyan Lu

Electronic Theses and Dissertations

Poly(acrylic acid) (PAA) is a weak polyelectrolyte presenting negative charge at basic condition when the carboxylic group loses a proton. These carboxylate group can interact with polycations and metal ions to form stable polyelectrolyte complexes (PECs), leading to tunable properties and multifunctional nanoscale structures through chemical reactions. This research focuses on nanofiber and nanoparticle fabricated by PAA-based PECs. We demonstrated the effect of ferric ion concentration on the mechanical properties of PAA-based single naonofiber by using dark field microscopy imaging and persistence length analysis. The application of PAA-based nanofiber mats loaded with MnO2 for supercapacitors was also explored. As a …

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Development And Validation Of A Scale To Measure Misconceptions About Educational Psychology Among Pre-Service Teachers, Morgan Mcafee Jan 2018

Development And Validation Of A Scale To Measure Misconceptions About Educational Psychology Among Pre-Service Teachers, Morgan Mcafee

Electronic Theses and Dissertations

Misconceptions are widespread or commonly held beliefs explicitly contradicted by empirical evidence. When teachers harbor misconceptions or unjustified beliefs about teaching, learning, and human motivation, the potential pedagogical consequences are profound, and these inaccurate beliefs may be instilled into future students through ineffective teaching strategies and gross misinterpretations of learning science. While existing research has examined misconceptions about general psychology and neuroscience among various populations, no prior work has evaluated pre-service teachers' misconceptions about topics of educational psychology, comprising inaccurate beliefs about teaching, learning, and human motivation. The purpose of this research is to describe the development and validation of …

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Determining The Small-Scale Structure And Particle Properties In Saturn's Rings From Stellar And Radio Occultations, Richard Jerousek Jan 2018

Determining The Small-Scale Structure And Particle Properties In Saturn's Rings From Stellar And Radio Occultations, Richard Jerousek

Electronic Theses and Dissertations

Saturn's rings consist of icy particles of various sizes ranging from millimeters to several meters. Particles may aggregate into ephemeral elongated clumps known as self-gravity wakes in regions where the surface mass density and epicyclic frequency give a Toomre critical wavelength which is much larger than the largest individual particles (Julian and Toomre 1966). Optical depth measurements at different wavelengths can be used to constrain the sizes of individual particles (Zebker et al. 1985, Marouf et al. 1983) while measurements of optical depths spanning many viewing geometries can be used to determine the properties of self-gravity wakes (Colwell et al. …

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A Comparison Of Student Achievement In Florida Charter Schools With For-Profit And Not-For-Profit Management Models, Maurice Kaprow Jan 2018

A Comparison Of Student Achievement In Florida Charter Schools With For-Profit And Not-For-Profit Management Models, Maurice Kaprow

Electronic Theses and Dissertations

In this study, the researcher compared student achievement in Florida charter schools by investigating differences in those managed by for profit and not-for-profit entities in all 530 charter schools that reported results on the 2016 Florida Standards Assessments in Grades 4, 8, and 10 in English Language Arts (ELA) and mathematics. Using a two-way analysis of covariance, this investigation found statistically significant achievement differences only in 10th-grade ELA when using poverty as a moderator variable and eighth-grade mathematics using both school cohort size and poverty as moderator variables. Also, the covariates of percentage of minority students, percentage of disabled students, …

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Exploring High Performing Second Grade Students' Reading Achievement And Time Spent On I-Ready With Their Motivation To Read., Chloe Webb Jan 2018

Exploring High Performing Second Grade Students' Reading Achievement And Time Spent On I-Ready With Their Motivation To Read., Chloe Webb

Electronic Theses and Dissertations

The motivation to read plays a key role in any student's reading development and success. In the context of 21st century literacies and learning, students engage in reading with print and digital texts and read in traditional and multimodal settings. This situated thesis explored the topic of second grade students' motivation to read through the lens of reading performance and time spent reading and improving their reading skills using i-Ready. Fourteen second grade students in a Central Florida elementary school classroom received the Motivation to Read Profile- Revised (MRP-R) (2013), an established survey, that is designed to gauge elementary school …

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Fiber Optimization For Operation Beyond Transverse Mode Instability Limitations, Joshua Bradford Jan 2018

Fiber Optimization For Operation Beyond Transverse Mode Instability Limitations, Joshua Bradford

Electronic Theses and Dissertations

Transverse Mode Instabilities (TMIs) stand as a fundamental limitation to power and brightness scaling in laser systems based upon optical fiber technologies. This work comprises experimental and theoretical investigations into fiber laser design that should minimize the effects of Stimulated Thermal Rayleigh Scattering. Theoretical discussions and simulations focus on how fiber parameters affect transverse mode coupling. These include core geometry optimization, pump geometry optimization, in addition to the effects of HOM content and losses on the TMI threshold. Experimentally, a high-power laser facility is commissioned with beam quality diagnostics to quantify the thresholds of the onset of modal interferences and …

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Machine Learning Methods For Flow Cytometry Analysis And Visualization, Emily Sassano Jan 2018

Machine Learning Methods For Flow Cytometry Analysis And Visualization, Emily Sassano

Electronic Theses and Dissertations

Flow cytometry is a popular analytical cell-biology instrument that uses specific wavelengths of light to profile heterogeneous populations of cells at the individual level. Current cytometers have the capability of analyzing up to 20 parameters on over a million cells, but despite the complexity of these datasets, a typical workflow relies on subjective labor-intensive manual sequential analysis. The research presented in this dissertation provides two machine learning methods to increase the objectivity, efficiency, and discovery in flow cytometry data analysis. The first, a supervised learning method, utilizes previously analyzed data to evaluate new flow cytometry files containing similar parameters. The …

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The Evolution Of Peristenus (Hymenoptera: Braconidae): Taxonomy, Phylogenetics And Ecological Speciation, Yuanmeng Zhang Jan 2018

The Evolution Of Peristenus (Hymenoptera: Braconidae): Taxonomy, Phylogenetics And Ecological Speciation, Yuanmeng Zhang

Electronic Theses and Dissertations

Parasitoid wasps are ecologically and economically important as biological control agents. However, little is known about the diversity, distribution and biology of most hymenopteran parasitoids due to their small size, morphological conservatism, and complex life styles. The focus of my PhD research was to investigate the evolution and speciation of euphorine braconid wasps, using a combination of multilocus phylogenetics and population genomic techniques combined with traditional taxonomy. The three data chapters of my dissertation are divided into different taxonomic ranks of euphorine braconids, focusing on genera, species, and populations. For chapter 2, I built a multilocus phylogeny of the tribe …

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The Impact Of 21st Century Community Learning Centers On Middle Schools In Seminole County, Ashley Buxton Jan 2018

The Impact Of 21st Century Community Learning Centers On Middle Schools In Seminole County, Ashley Buxton

Electronic Theses and Dissertations

The objective of the study was to research the impact 21st Century Community Learning Centers (CCLC) has on Title 1 middle school students in Seminole County. A mixed methods design was used to interview and survey teachers working for the after-school program, and student data was collected to assist in identifying the impact of the program. Initially, interviews were conducted to research the implementation of the program. Following interviews, willing participants completed the survey sent out to all middle school teachers who work for 21st CCLC. The survey investigated how the vision of the program was presented to staff and …

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