Digital Commons Network^™

Causes And Consequences Of Individual Phenotypic Differences In Brachyuran Crabs With A Focus On Behavior, Benjamin A. Belgrad

Theses and Dissertations

Individual variation defines almost every morphological, physiological, and behavioral aspect of populations and is a fundamental component of many ecosystem processes. Recent work indicates that accounting for these individual differences can enhance our ability to predict community responses to environmental disturbances which is becoming increasingly important in an era of extraordinary global change. However, our understanding of how different individual characteristics are connected to each other and governed by the environment remains limited.

This study sought to evaluate the relationship between individual behavior, physiological condition, and local habitat for Brachyuran crabs as well as the subsequent strength of their predator-prey …

Bird's Eye View: Cooperative Exploration By Ugv And Uav, Shannon Hood

Theses and Dissertations

This paper proposes a solution to the problem of cooperative exploration using an Unmanned Ground Vehicle (UGV) and an Unmanned Aerial Vehicle (UAV). More specifically, the UGV navigates through the free space, and the UAV provides enhanced situational awareness via its higher vantage point. The motivating application is search and rescue in a damaged building. A camera atop the UGV is used to track a fiducial tag on the underside of the UAV, allowing the UAV to maintain a fixed pose relative to the UGV. Furthermore, the UAV uses its front facing camera to provide a birds-eye-view to the remote …

Low Bandwidth Communication For Networked Power Hardware-In-The-Loop Simulation, Sean Borgsteede

Theses and Dissertations

Power-Hardware-In-the-Loop (PHIL) simulations allow the design and validation of power hardware components in virtual power system schemas with near real-time operation. This technique is increasingly used in the development cycle of many products to reduce design costs and increase design fidelity. The Hardware under Test (HuT) interfaces with a simulation of the user’s choosing through a hardware interface (HI). The digitally simulated system (DSS) runs on the real-time simulator before sending a reference value to the hardware interface to enforce. In this virtual to real interface, closed-loop stability and the simulation accuracy are the two paramount criteria in regards to …

Effectiveness Of Pictorial Health Warning Labels For Indonesia's Cigarette Packages, Dien Anshari

Theses and Dissertations

Pictorial health warning labels (PHWL) on cigarette packaging is a key way to communicate with consumers about the harms from tobacco, particularly in the low- and middle-income countries that do not have the resources for effective mass media campaigns. Research is needed to determine the most effective PHWL content for Indonesia, a country with one of the largest populations of smokers in the world and amongst the weakest tobacco policy environments. This research aimed to determine the most effective PHWL content for Indonesia’s cigarette packages, including the social and psychological factors that may influence PHWL effects.

Data for this study …

Short Term International Study For Teachers As A Form Of Experiential Learning: A Case Study Of American Educators In Turkey, Zulfikar Berk

Theses and Dissertations

This dissertation is a case study of the experiences and perspectives of nine US teachers who participated in a short-term international study tour to Turkey, from the theoretical perspectives of global education and experiential learning. It examines how that experience shaped the teachers’ understandings of global dynamics, cultural differences and experiential learning. It also sought to understand how teachers incorporated what they learned from their international experience into their subsequent educational activities. This study has implications for teachers and professionals who are considering short-term international study in order to enhance their global perspectives and their approaches to providing global education …

Cross Roads Of The Living And The Dead: Necropolitics And Market Logic In Chris Abani's Graceland, Joshua Dunn

Theses and Dissertations

This thesis argues that Chris Abani’s 2004 novel Graceland presents the austerity programs imposed on Nigeria in the 1980s as a form of financialized necropolitics. Through its representation of the entanglement between transnational capital interests and repressive state security forces, Graceland offers new ways of theorizing neoliberal governance and its relationship to the construction of what Achille Mbembe calls “death worlds.” In the novel, the state’s instrumentation and destruction of human bodies (for the accumulation of wealth) becomes an apt metaphor for structural adjustment. But the novel goes further by demonstrating how this logic of accumulation utilizes biopolitical and even …

Dynamic Model And Control Of Quadrotor In The Presence Of Uncertainties, Courage Agho

Theses and Dissertations

This thesis considers the control of quadrotor using a linear PID control and ℒ1 adaptive control. In a justifiable concept, PID controller can be used to control a quadrotor, but in the presence of uncertainties or disturbance, the quadrotor can’t be automatically adjusted to control the changing dynamics of the quadrotor. To solve the problem associated with uncertainties, various control methodology can be used for controlling the changing dynamic of quadrotor, but in this thesis, ℒ1 adaptive control is used because it allows for fast and robust adaptation for desired transient performance in the presence of matched and unmatched uncertainties. …

Electroproduction Of W Mesons Off Protons In The Third Resonance Region And Beyond, Evan Phelps

Theses and Dissertations

Exclusive electroproduction of ω(782) mesons in the reaction ep → epω → epπ+π−π0 was studied from the production threshold, through the third resonance region, and beyond. With electron beam energies close to 6 GeV, the kinematic range covers W = [1.72, 2.60) GeV and Q2 = [1.85, 5.15) GeV2. By combining two sets of data collected by the Thomas Jefferson National Accelerator Facility’s wide-acceptance spectrometer (CLAS), the largest set of resonance-region differential cross sections, d2σh dΩ∗ , for ω electroproduction have been produced. Response functions RT + LRL, RTT , and RTL were extracted to provide a view of how …

Physical Characterization Of Electrodeposited Pcb Copper Foil Surfaces, Blessing Kolawole Ojo

Theses and Dissertations

Given that data rates of computers is on the rise and optimization of bus speeds continue to be of importance in improving the system performance, different models for a prediction of the impact of the surface roughness of copper foil have been developed and incorporated into different software’s and applications used by design engineers.

With different models known to have been created for characterization of electrodeposited copper, they have been mostly affected by the need for higher frequencies as they are mostly useful for prediction at frequency of a few GHz. With the introduction of a new model (known as …

Speaking Of Qualia: Examining A Craft Beer Microcommunity's Membership Identity Through Speech, Anna Hamer

Theses and Dissertations

This ethnography examines a locally owned craft beer store in South Carolina, where craft beer connoisseurs and enthusiasts come together to elevate their beer drinking experience. Many members of this microcommunity use ‘beer talk’, a technical register of speech (Agha 2007; Manning 2008; Silverstein 2006, 2016), to point to, or index, a part of their beer connoisseur identity. The ‘beer talk’ register used to describe craft beer is enacted at various scales of speech (Carr and Lempert 2016), ranging from Cicerone Certification and mobile applications, to online forums, beer festivals, beer magazines, brewery visits, and face-to-face interaction. The CofP model …

Examining Chronic Sorrow Among Parents Of A Child With Autism Spectrum Disorder (Asd), Tiffany M. Bordonada

Theses and Dissertations

The purpose of this quantitative study was to examine the directional relationship between chronic sorrow and each of the following (a) family understanding, (b) social support, (c) coping behaviors, and (d) competence among parents of a child with autism spectrum disorder (ASD). Specifically, this examination tested the hypothesized directional relationship that parents of a child with ASD scoring higher levels of family understanding, social support, coping behaviors, and competence indicate lower levels of chronic sorrow. A descriptive, correlational research design was employed to examine the research hypothesis. The data was analyzed using structural equation modeling (SEM). The results indicated parents …

The Impact Of Critical Thinking Strategies On Curriculum And Instruction For Usaf Operations Intelligence, Jason R. Baker

Theses and Dissertations

The goals of the present action research study were to understand intelligence analysts’ perceptions of weapon systems visual recognition (vis-recce) training and to determine the impact of a Critical Thinking Training (CTT) Seminar and Formative Assessments on unit-level intelligence analysts' vis-recce performance at a mid-western United States Air Force (USAF) base where the participant-researcher is the USAF unit’s senior intelligence officer which is congruent with action research methods. The identified problem of practice is based on the fact that after decades of viewing vis-recce training as a rote requirement and watching intelligence analysts struggle on the summative assessment, the USAF …

A Regression Analysis Of South Carolina Algebra I End-Of-Course Exam Scores By Schedule Type, Dawn M. Smith

Theses and Dissertations

The purpose of this study was to examine the relationship between scheduling and first-year-high-school students’ exam scores on the South Carolina Algebra I End-of-Course (EOC) assessment. The study compared existing empirical data from two southeastern high schools from the same school district using 4 X 4 block schedules from 2011-2014 and modified block (A/B) schedules from the years 2014-2016. The study results included Algebra I EOC exam scores from the 3 years each school was on a 4 X 4 block schedule and for the 2 years each school employed a modified (A/B) block schedule. South Carolina Algebra I EOC …

Bayesian Flexible Modeling Of Interval-Censored Failure Time Data, Sheng-Yang Wang

Theses and Dissertations

Interval-censored data are a special type of survival data, in which the survival time is not accurately observed but known to fall within a specific time interval. Interval censored data commonly arise in real-life epidemiological and medical studies that involve periodic examinations. In this dissertation, several semi-parametric regression models are investigated to provide flexible modeling and robust inference for interval censored data from Bayesian perspectives.

Chapter 1 provides a detailed description about interval-censored data and gives several examples. Existing models and methods for analyzing such interval-censored data are reviewed as well. Chapter 2 develops a unified Bayesian estimation approach under …

Representing The Relationships Between Field Collected Carbon Exchanges And Surface Reflectance Using Geospatial And Satellite-Based Techniques, Alexandria G. Mccombs

Theses and Dissertations

Carbon exchanges between the atmosphere and the land surface vary in space and time, and are highly dependent on land cover type. It is important to quantify these exchanges to understand how landscapes affect the carbon budget, which will have a significant impact on future climate change and will inform climate change projections. However, how do you represent regional carbon exchanges from a single meteorological station? A single observing station will represent a limited area around the station, but each individual observation will sample a different physical land area in time due to varying wind speeds, wind direction, and atmospheric …

The Life And Legacy Of Samul Feinberg, Solomon Eichner

Theses and Dissertations

Samuil Feinberg (1899-1962), a modern day Liszt, has not been given the credit he deserves. Living under the Stalin Regime, he was neglected and repressed. This pianist, composer and pedagogue lived an artistic life that is worth studying and reviving. Heavily influenced compositionally by Scriabin, Feinberg played an important role in continuing the Russian revolutionary avant-garde style between 1915 and 1930. Feinberg went through two compositional periods, the first being a more virtuosic experimental style and the second a more conservative, contrapuntal and folk influenced style. Feinberg had a deep connection to Bach and transcribed many of his pieces in …

Advances In Chemistry, Part I: Noise, Calibration, And Educational Advances In Analytical Chemistry. Part Ii: Safety Oversight In Chemical Journals, Lauren E. Grabowski

Theses and Dissertations

Part I:

The accuracy and precision of the results of any chemical analysis depends on the calibration graph and its associated systematic and random errors. Least squares regression generally treats all data with equal weights. A weighted least-squares fit is an improvement but requires knowledge of the imprecision in each point of the calibration graph. The imprecision is not easy to estimate with high confidence because of the large number of replicates needed.

The imprecision depends on the types and magnitudes of the sources of noise. We characterized the noise sources in ICP-OES and UV/Vis and developed a model that …

Motivation To Play Esports: Case Of League Of Legends, Yaoyao Sun

Theses and Dissertations

The population of playing electronic sports has increased recently, and the most popular one is League of Legends (LoL). As a multiplayer online battle arena video game, it’s not only a game, but also a competitive electronic sport. The purpose of this study was to assess the motivations of playing League of Legends and to relate them by genders, age groups and frequency groups. The final sample comprised 111 LoL players. The study categorized 12 items into three factors: achievement, socialization and immersion. Results indicated that achievement factors were stronger motives for men than women. For different age groups, there …

Antimicrobial Biomaterials And Sustainable Polymers From Renewable Biomass, Mitra Shiran Ganewatta

Theses and Dissertations

In this dissertation, development of antimicrobial biomaterials and sustainable polymers from renewable biomass is described. In Chapter 1, an overview and recent development about sustainable polymers from renewable biomass, antimicrobial biomaterials and polymerization methods are given. Afterwards, the major research objectives of this doctoral research work are described.

Innovative cationic polymers containing pine resin sourced abietic acid is discussed in Chapter 2. The preparation of cationic compounds is conversed via a combination of Diels-Alder, catalytic esterification, quaternization and subsequent decoration of polycaprolactone that was prepared via ring-opening polymerization (ROP). Furthermore, the antimicrobial activity against a range of bacteria, biocompatibility with …

Shaping Metallic Nanoparticles Toward Integrated Plasmonics And Catalysis, Qingfeng Zhang

Theses and Dissertations

Noble metal nanoparticles have been of tremendous interest because of their intriguing size- and shape-dependent plasmonic and catalytic properties. The combination of tunable plasmon resonances with superior catalytic activities on the same nanoparticle, however, has long been challenging because plasmonics and catalysis require nanoparticles in two drastically different size regimes. Tunable plasmon resonances is a unique feature of sub-wavelength metallic nanoparticles, whereas heterogeneous catalysis requires the use of sub-5 nm nanoparticles as the catalysts. In this dissertation, I firstly found a unique way to bridge this size gap between nanoplasmonics and nanocatalysis. I demonstrated that desired plasmonic and catalytic properties …

The Emergence, Forgetting And Re-Writing Of May ’68, Allison Dorman

Theses and Dissertations

The time period of May 1968 in France has become an important cultural moment in French history and is often present in current political debates. I propose that the critiques of French society expressed during the events of May and June 1968 were present before that time and can be seen in literature and creative expression of the time period, as in the film Week-end, by Jean-Luc Godard, and the play Yes, peut-être, by Marguerite Duras. Godard and Duras express a deep discontent with the society in which they live and their creations imagine the consequences of Western ideals taken …

Context Matters: Evaluating Social Judgments Of Acquaintance Rape Myths, Michelle E. Deming

Theses and Dissertations

The objectives of my dissertation are to: 1) determine the social psychological factors affecting rape myth judgments and, 2) develop an instrument that utilizes realistic social contexts to measure acquaintance rape myth adherence among undergraduate students. The Illinois Rape Myth Acceptance Scale (IRMA; McMahon and Farmer 2011; Payne et al. 1999) was used to create acquaintance rape vignettes using factorial surveys (Rossi and Anderson 1982). I manipulated factors known to be associated with victim-blame such as alcohol, a previous sexual relationship, if the woman is dressed provocatively, the type of relationship (e.g., acquaintance versus friend), if the woman verbally protested, …

Multidisciplinary Shape Optimization Of A Composite Blended Wing Body Aircraft, Charles Maxwell Boozer

Theses and Dissertations

A multidisciplinary shape optimization tool coupling aerodynamics, structure, and performance was developed for battery powered aircraft. Utilizing high-fidelity computational fluid dynamics analysis tools and a structural wing weight tool, coupled based on the multidisciplinary feasible optimization architecture; aircraft geometry is modified in the optimization of the aircraft’s range or endurance. The developed tool is applied to three geometries: a hybrid blended wing body, delta wing UAS, the ONERA M6 wing, and a modified ONERA M6 wing. First, the optimization problem is presented with the objective function, constraints, and design vector. Next, the tool’s architecture and the analysis tools that are …

Supporting Immersion Teachers: An Autoethnography, Lauren Speece

Theses and Dissertations

Immersion programs face a variety of challenges that are common to the field, such as lack of materials appropriate for students’ language abilities, assessment, teacher recruitment and retention, balancing content and language, and relevant, high quality professional development for teachers. However, within specific micro-contexts, other issues can affect the success of immersion programs. Since the teacher’s role is critical in all aspects of the immersion classroom, more emphasis needs to be placed on talking with teachers about their experiences in order to provide better professional development, and to build a stronger community of support.

This narrative autoethnography examines my journey …

Cost And Fuel Usage Optimization Of Activating Solution Based Silica Fume Geopolymer Concrete, Lateef Najeh Assi

Theses and Dissertations

Development of sustainable construction materials has been the focus of research efforts worldwide in recent years. Concrete is a major construction material; hence, finding alternatives to ordinary Portland cement is of extreme importance due to high levels of carbon dioxide emissions associated with its manufacturing process. Geopolymer concrete is a potential solution; however, concerns about the high cost and the low real fuel energy efficiency are obstacles against its increase in the market share.

In this thesis, the current cost and fuel (thermal energy) usage are calculated. In addition, the cost and fuel usage were optimized based on previous experimental …

A Family Of Simple Codimension Two Singularities With Infinite Cohen-Macaulay Representation Type, Tyler Lewis

Theses and Dissertations

A celebrated theorem of Buchweitz, Greuel, Knörrer, and Schreyer is that the hypersurface singularities of finite representation type, i.e. the hypersurface singularities admitting only finitely many indecomposable maximal Cohen-Macaulay modules, are exactly the ADE singularities. The codimension 2 singularities that are the analogs of the ADE singularities have been classified by Frühbis-Krühger and Neumer, and it is natural to expect an analogous result holds for these singularities. In this paper, I will present a proof that, in contrast to hypersurfaces, Frühbis-Krühger and Neumer’s singularities include a subset of singularities of infinite representation type.

Planters, Merchants, And Revolution: Lobbying Power And The Economic Origins Of Independence In South Carolina, Christian David Lear

Theses and Dissertations

The origins of the American Revolution in South Carolina derived from politicoeconomic factors. Most prominent among those factors was the lobbying power that elite South Carolinians sought within a new confederation. The ruling class of the province looked to the British Caribbean and perceived an immense lobbying power that resulted from the strong economies of sugar islands such as Jamaica. South Carolina simply could not match this power because of the disparate economies. Islands of the British Caribbean enjoyed tremendous clout in shaping imperial policy because of the revenue raised by sugar exports. On the mainland, however, South Carolina enjoyed …

Semiparametric Estimation And Inference In Causal Inference And Measurement Error Models, Jianxuan Liu

Theses and Dissertations

This dissertation research has focused on theoretical and practical developments of semiparametric modeling and statistical inference for high dimensional data and measurement error data. In causal inference framework, when evaluating the effectiveness of medical treatments or social intervention policies, the average treatment effect becomes fundamentally important. We focus on propensity score modelling in treatment effect problems and develop new robust tools to overcome the curse of dimensionality. Furthermore, estimating and testing the effect of covariates of interest while accommodating many other covariates is an important problem in many scientific practices, including but not limited to empirical economics, public health and …

Multimorbidity And Mortality Risk: The Effect Of Depressive Symptom Trajectories Among Middle-Aged And Older Adults, Katherine Reynolds O’Shields

Theses and Dissertations

Introduction

Multimorbidity, commonly defined as having two or more chronic conditions, is a major burden in middle-aged and older adults, causing increased risks for hospitalizations, medical care costs, and even death. One condition with severe adverse effects in the older population is depression. Depression has been shown to increase ones social isolation while compounding self-management, eventually increasing ones chance for mortality. Multimorbidity coupled with depression has been shown to increase the risk for mortality; however, these results are typically based on a one-time depression evaluation. The main objective of this study is to examine if depressive symptom trajectories modifies the …

Economic Burden Of Tuberculosis Among Bangladeshi Population And Economic Evaluation Of The Current Approaches Of Tuberculosis Control In Bangladesh, Mohammad Rifat Haider

Theses and Dissertations

Introduction: Tuberculosis (TB) is major scourge for human history and causes profound economic burden. Bangladesh is a high burden TB country with 12% of its annual death is caused and 362 thousand people are infected by TB. DS-TB is the most prominent type of TB found in Bangladesh and a 6 month drug regimen (2 month intensive and 4 month continuation phase) is followed. But the directly observed treatment short-course (DOTS) differ in delivery through community health workers (CHW) and community members (CM). Bangladesh has also experienced surge in the number of MDR-TB cases with a 29% of MDR-TB cases …