Digital Commons Network^™

We Are One: The Role Of Group Identity And Self-Sacrificial Leaders On The Generation Of Social Capital Within Youth Sport Programs, Dorothy R. Collins

Theses and Dissertations

Popular culture often assumes that participation in youth sport has a host of positive benefits, including the ability to generate social capital, spur future occupational success and encourage greater levels of civic engagement (Coalter, 2007). There is; however, little empirical evidence to support this ideal (Coakley, 2011). In fact, little is known about the specific conditions within a sport organization that likely to facilitate youth sport organizations to become more adept at generating, maintaining, and distributing social capital to their members. Using the Community of Practice framework (Wenger, McDermott & Snyder, 2002) as a lens, the author investigated the conditions …

Academic Motivation Profiles Of 10th Grade Students: Exploring A Relationship With Socioeconomic Level Using A Person Oriented Approach, Sandra Lynn Rogelberg

Theses and Dissertations

Motivation is an important predictor of educational success, as is socioeconomic status. This study used Expectancy Value Theory (EVT) and a person oriented approach as the framework to explore how motivation profiles may be related to context, namely socioeconomic status (SES), and the roles these profiles have in predicting education outcomes. Five motivation variables: math self-efficacy, reading self-efficacy, control expectation, action control, and utility value (instrumentation motivation) were used in latent profile analysis to determine four latent motivation profiles from a national sample of 10,981 10th grade students using ELS:2002 data. Family income and education level (SES) were considered a …

Enhancements In Alginate Microencapsulation Technology & Impacts On Cell Therapy Development, Marwa Belhaj

Theses and Dissertations

Biodegradable alginate microcapsules (MC) are recently becoming widely used in the biomedical field, and have shown effectiveness as a drug delivery system. Alginate has been used in microencapsulation due to its simple gelling process, biodegradability, excellent biocompatibility, and its stability under in-vivo conditions. Alginate polymer is a natural polysaccharide derived from brown seaweed and has the ability to polymerize rapidly in the presence of cations to form a porous matrix. In order to advance the previous system for efficient protein and peptide delivery, we further lyophilized the peptide-filled microcapsules and we were able to rehydrate, and test them for sustained …

Plants As Biofactories To Produce Mammalian Tumor Suppressor Micrornas, John Lachlan Macarthur

Theses and Dissertations

MicroRNAs (miRNAs) are small noncoding single stranded RNAs that are considered master regulators of gene expression. They are also an emerging class of therapeutic agents with significant potential for the prevention and treatment of many diseases, including cancer. Many different forms of cancer are associated with loss or reduced accumulation of one or more miRNAs that function as tumor suppressors. In animal models, restoration of missing tumor suppressor miRNAs prevents the initiation, progression and/or spread of the disease. However, the current absence of an efficient method for delivery of therapeutic miRNAs is a critical barrier to their use. The research …

Matrix Stiffness Modulates Mesenchymal Stem Cell Sensitivity To Geometric Asymmetry Signals, Maria Eugenia Piroli

Theses and Dissertations

Human stem cells hold significant potential for the treatment of various diseases. However, their use as a therapy is hampered by the limited understanding of the mechanisms by which stem cells respond to environmental stimuli. Efforts to understand extracellular biophysical cues have demonstrated the critical roles of geometric and mechanical signals in determining the fate of stem cells. The goal of this study was to explore the interplay between cell polarity and matrix stiffness in stem cell lineage specification. We hypothesize that confining cells to asymmetric extracellular matrix (ECM) islands will impart polarity at a single-cell level and result in …

Quantifying Time Retarded Electromagnetic Fields And Their Applications In Transmission Lines, Brandon Thomas Gore

Theses and Dissertations

Modern baseband signaling that facilitates the passing of information over high speed interconnects such as copper twin-ax cable and printed circuit boards supports single line data rates of 100 Gbps. Next generation bandwidth requirements of electrical links are approaching frequencies up to 50 GHz. Yet, signal integrity engineers that analyze these interconnects rely on models with underlying assumptions and limited extensions beyond those proposed in the 19th century to describe per unit length characteristics of Resistance, Inductance, Conductance, and Capacitance (RLGC) for transatlantic telegraph cable. An excluded phenomenon is the time retarded behavior of electromagnetic fields. The aim of this …

Epistemological Issues In Quality Of Life Measurement And Their Implications, Laura M. Cupples

Theses and Dissertations

This project explores the epistemology of quality of life measurement. Quality of life measures face a dual epistemic burden both to serve as data for the evidence-based medicine movement and to give patients a greater voice (McClimans 2017). Much time, effort, and money has been invested in these measures over the last 50 years, and yet their theoretical foundations remain weak. It is not clear whether these instruments succeed in measuring what they purport to measure, or what precisely is meant by “quality of life” (Hunt 1997). The epistemic challenges faced in quality of life measurement are not wholly unique. …

The Rational Synthesis Of Bimetallic Catalysts On Oxide Supports, Andrew Phillip Wong

Theses and Dissertations

Catalysts play an important role in many chemical reactions. However, simple impregnated monometallic catalysts are often limited in their function. One way to overcome this limitation is through the incorporation of a secondary metal to the catalysts. These bimetallic catalysts often have synergistic benefits not observed in the monometallic analogues. Here, we focused on the synthesis of bimetallic catalysts using rational methods in order to improve catalyst function; specifically by tuning the particle size, morphology, and composition. The two methods of interests were Strong Electrostatic Adsorption (SEA) and Electroless Deposition (ED). An adaptation of SEA to bimetallic catalysts (coSEA) was …

Improving Speech-Related Facial Action Unit Recognition By Audiovisual Information Fusion, Zibo Meng

Theses and Dissertations

In spite of great progress achieved on posed facial display and controlled image acquisition, performance of facial action unit (AU) recognition degrades significantly for spontaneous facial displays. Furthermore, recognizing AUs accompanied with speech is even more challenging since they are generally activated at a low intensity with subtle facial appearance/geometrical changes during speech, and more importantly, often introduce ambiguity in detecting other co-occurring AUs, e.g., producing non-additive appearance changes. All the current AU recognition systems utilized information extracted only from visual channel. However, sound is highly correlated with visual channel in human communications. Thus, we propose to exploit both audio …

Sustainable Soybean Oil And Lignin Derived Monomers And Polymers For Potential Use In Polymeric Materials, Ryan Miskin

Theses and Dissertations

In this thesis project, high oleic soybean oil and lignin derived monomers and polymers are investigated. The properties of these monomers and polymers are characterized and discussed.

Chapter 1 details the potential impact of bio-based resources, monomers, and polymers on the environment. An introduction on polymerization techniques is given, and the overall objectives of my research are discussed.

In Chapter 2, attempts are made at modifying a soybean oil derived thermoplastic polymer into a vitrimer. The synthesis of thermoplastics is reviewed and the vitrimer trials outlined. Different scenarios that arose are examined and discussed.

Chapter 3 outlines the preparation of …

Analysis Of Pellet-Cladding Mechanical Interaction On U3si2 Fuel With A Multi-Layer Sic Cladding Using Bison, Ray A. Freeman

Theses and Dissertations

U3Si2 is currently being considered as a possible replacement for the current light water reactor fuel, UO2. U3Si2’s high melting temperature, high uranium density, and high thermal conductivity are favorable in accident conditions, such as a loss of coolant accident. Improved accident performance is further expected when paired with a SiC/SiC cladding, since it provides relatively high strength and a high oxidation resistance.

Modeling of U3Si2 and SiC/SiC in reactor is currently very important since much of their behavior is still unknown. By implementing models that describe the properties of U3Si2 and SiC/SiC into INL’s fuel performance code BISON, performance …

Physics-Based Approaches For Structural Health Monitoring And Nondestructive Evaluation With Ultrasonic Guided Waves, Md Yeasin Bhuiyan

Theses and Dissertations

The engineering infrastructures have a growing demand for damage monitoring systems to avoid any potential risk of failure. Proper damage monitoring solutions are of a great interest to this growing demand. The structural health monitoring (SHM) and nondestructive evaluation (NDE) offer appropriate online and offline damage monitoring solutions for a variety of mechanical and civil infrastructures that includes unmanned aerial vehicles (UAV), spaceships, commercial aircraft, ground transportation, wind turbines, nuclear spent fuel storage tanks, bridges, naval ships, and submarines. The fundamentals of the ultrasonic SHM and NDE consist of multi-disciplinary fields. The dissertation addresses SHM and NDE using ultrasonic guided …

College Success Class: A Targeted Soft Skills Inventory For Student Success, Beth Ann Scruggs

Theses and Dissertations

College Success, Freshman Seminar, College 101, or University 101—all of these courses have the common theme of providing students with the knowledge and skills necessary for them to be successful in navigating higher education. This might mean attaining a certificate or degree, or in some cases, transferring to a four-year institution. While content knowledge is unquestionably important, the ability to employ multiple soft skills and learning strategies is also essential for a student to successfully transition to college (Conley, 2013). At Middletown Tech, a designated public, two-year, associate degree-granting institution in the U.S. South, the College Success course is intended …

Once A Felon….Always A Felon? A Comparative Case Study Of The Experiences Of Convicted African-American Fathers, Douglas Bates

Theses and Dissertations

Currently, African-Americans account for 12.3% of the U.S. population but represent 38% of the prison population (The Sentencing Project, 2016). Of the many African-American males sent to prison each year, there is limited research that explores the impact a conviction has on African-American fathers. Within the literature, researchers (Laakso & Nygaard, 2012; Miller, et. al., 2013, Flouri & Buchanan, 2002; Lee, Sansone, Swanson, & Tatum, 2012; Johnson & Easterling, 2015; Miller, 2006; Lopez & Bhat, 2007; Aaron & Dallaire, 2009) only focus on the effect incarceration has on children and the experiences of fathers while incarcerated (Roy & Dyson, 2005; …

The Lost Ones: The Cold War State, Child Welfare Systems, And The Battles Over The Rosenberg Children, Megan Bennett

Theses and Dissertations

The conspiracy case against Julius and Ethel Rosenberg was a formative event in the early stages of the Cold War, but it also set their two sons adrift in a domestic climate which emphasized domestic order but feared communists and those connected to communists within their midst. Michael and Robert Rosenberg’s lives remained in various states of instability from their mother’s arrest in August 1950 until they were adopted by Anne and Abel Meeropol in 1958. The placement of the Rosenberg children with the Meeropols came only after years of upheaval and family strife in which the notoriety of the …

Combustion Behavior Of Sub-Millimeter Sized Oxygenated And N-Alkane Fuel Droplets, Mohammad Fahd Ebna Alam

Theses and Dissertations

The primary scientific explorations of this thesis work are to better understand (a) microgravity fire-suppression of untested extinguisher, (b) combustion kinetic model refinement of renewable fuel butanol (C4H9OH) isomers, and (c) directly induced cool flame dynamics of higher n-alkane fuels from an isolated small droplet combustion perspective employing computational fluid dynamics with comprehensive chemical kinetics. The chronological development of the research direction shifts from a relatively small fuel like methanol (CH3OH) to heavier straight paraffinic fuel n-decane (n-C10H22). The first installment of the thesis is directed towards answering the feasibility of thennewly considered fire suppressant xenon (Xe) for microgravity space …

The Kingma System Flute: Redesigning The Nineteenth-Century Flute For The Twenty-First Century, Diane Elise Kessel

Theses and Dissertations

This project investigates the development and reception of the Kingma System flute, designed by Dutch flutemaker Eva Kingma. For some time now, flutists have been honing creative techniques to provide imperfect approximations of what composers have specified, but the Kingma mechanism achieves the exact effects desired with ease. Through her close work with composers and performers, Eva Kingma was able to create a mechanism that is comfortable to play, versatile in performance, and beautifully suited for contemporary repertoire. The Kingma flute is an invaluable tool for performers and an exciting new voice for composers, offering unprecedented musical possibilities and yet …

A Complete History Of Rico Reeds, Neal Postma

Theses and Dissertations

Rico is a household name among saxophonists and clarinetists around the world. Since the company’s inception, they have moved from importing several hundred reeds for Frank di Michele to sell to his friends to being among the largest manufacturers in the industry. This document traces the history of the company from its inception in 1928 to the date of its purchase by J. D’Addario & Co. in 2004. Through interviews, document reviews, and data gathering, this document explores the history of the company, the owners and managers, the products, and the events that led to D’Addario’s acquisition.

“As The Occasion Demands”: Constraint-Based Practice In Rhetoric And Composition, Erica Kerstin Fischer

Theses and Dissertations

In their 2010 Composition Studies article, Laurie Gries and Collin Brooke observe, “constrained writing has been underappreciated” in the composition classroom (21). Taking seriously the potential value of constraints in pedagogical practice, this project executes a cross-disciplinary examination (drawing from design theory, experimental poetry, literary theory, composition, and rhetorical theory) of the various occurrences of, and approaches to, constraints and their influences on the ways we think and write. This investigation reveals that constraints create the conditions under which students can become productively defamiliarized to their thinking and writing habits, encouraging them to encounter alternatives otherwise left unnoticed.

I suggest …

Understanding Early Amyloid-Ss Aggregation To Engineer Polyacid-Functionalized Nanoparticles As An Inhibitor Design Platform, Nicholas Vander Munnik

Theses and Dissertations

Alzheimer’s disease (AD) is characterized by the presence of amyloid-ß (Aß) protein aggregates in the brains of those afflicted. This protein aggregates via a complex pathway to progress from monomers to soluble oligomers and ultimately insoluble fibrils. Due to the dynamic nature of aggregation, it has proven exceedingly difficult to determine the precise interactions that lead to the formation of transient oligomers. A statistical thermodynamic model has been developed to elucidate these interactions. Aß was simulated using fully-atomistic replica exchange molecular dynamics. We use an ensemble of 5 × 105 configurations taken from these simulations as input for a self-consistent …

Scientific Practices For Student-Centered Inquiry: The Impact Of A Focus On Student Proficiency In Data Analysis And Scientific Argumentation On Inquirybased Practices In A First-Grade Classroom, Whitnee Grant

Theses and Dissertations

Previous to this study, teaching and learning practices in the first-grade classroom of study were primarily teacher and content driven and did not reflect the student-driven inquiry process. The identified problem of practice for this action research study was the first-grade students in the teacher-researcher classroom did not demonstrate inquiry or scientific literacy through content-centered teaching practices. The research plan presented addressed the use of scientific practices as they related to inquiry-based teaching and learning. An action research methodology was used to explore the instructional tools that increased student proficiency in two specific scientific practices: analyzing and interpreting data and …

The Representations Of Gender And Sexuality In Contemporary Arab Women’S Literature: Elements Of Subversion And Resignification., Rima Sadek

Theses and Dissertations

Arab women’s literature continue to receive considerable critical attention by scholars in East and West. However, through my focus on three novels in this dissertation, The Cinnamon’s Aroma (2008) by Samar Yazbek, Brooklyn Heights (2011) by Miral al-Tahawy and It’s Called Passion (2009) by Alawiya Sobh I hope to contribute a more holistic understanding of these works by highlighting features not fully explored in previous scholarship. I concentrate on the creative means of struggle and resistance to the entrenched structures of oppression locating sights of potential hope and emancipation. I point out the ways in which these texts subvert and …

Multi-Scale Flow Mapping And Spatiotemporal Analysis Of Origin-Destination Mobility Data, Xi Zhu

Theses and Dissertations

Data on spatial mobility have become increasingly available with the wide use of location-aware technologies such as GPS and smart phones. The analysis of movements is involved in a wide range of domains such as demography, migration, public health, urban study, transportation and biology.

A movement data set consists of a set of moving objects, each having a sequence of sampled locations as the object moves across space. The locations (points) in different trajectories are usually sampled independently and trajectory data can become very big such as billions of geotagged tweets, mobile phone records, floating vehicles, millions of migrants, etc. …

Practices, Beliefs, And Perceptions Of Effective Science Teachers In Elementary Schools Serving Low Socioeconomic Communities, Edwin Wheeler Emmer

Theses and Dissertations

Students who come from low socioeconomic status (SES) backgrounds are more likely to manifest a science achievement gap when compared to their high SES peers as a result of the myriad of factors that have the potential to influence student performance, including limited access to resources, fewer life experiences, health care concerns, fewer extracurricular opportunities, etc. (Crook & Evans, 2014; Duke, 2000; Ladd, 2012; Sirin, 2005). This achievement gap can be exacerbated in the elementary setting where many teachers do not feel comfortable teaching science as a result of a lack of science content knowledge and limited experience teaching inquiry-based …

Evangelicals, Perceived Marginalization And Expressive Mobilization, Christin E. Mcmasters

Theses and Dissertations

Expressive forms of collective and individual mobilization of the evangelical population in the United States have been understudied in both social movement theory and religion and politics literature. While these forms of mobilization are not the only form of mobilization, they are important to understanding what specific issues evangelicals are feeling aggrieved about. Current research such as Wong (2018a; 2018b) and Sides, Tesler, and Vavreck (2018) have found that there is a growing sense of racial anxiety among the ranks of white evangelicals. Hence, it is likely that evangelicals, at least white evangelicals, are feeling a sense of marginalization.

I …

Development Of Bimetallic Catalysts For Dry Reforming Of Methane And Hydrogenation Of Succinic Acid, Jayson Michael Keels

Theses and Dissertations

Advances in natural gas recovery have greatly impacted the global economy; the abundant supply of gas has revealed new opportunities and challenges in a wide range of markets within the fuels and chemicals industries. One such opportunity exists with the overabundance of gas from remote wells that is flared or emitted because of the high costs associated with transportation of a chemical with such a high molar volume. A possible solution is an on-site process to convert gas to higher value chemicals that are liquid at standard conditions, and can more easily be transported. As a first step, CO2 from …

Construction Of Supramolecular And Coordination Compounds From Pyridyl Bis-Urea Macrocycles, Bozumeh Som

Theses and Dissertations

The self-assembly of macrocyclic molecules in solution and in the solid state modulates and in many cases enhances their properties for applications in sensing, catalysis and optoelectronics. The self-assembled structures are typically organized by non-covalent interactions such as hydrogen bonding, π-π stacking and dipole-dipole interactions. Our group has focused on the design and synthesis of bis-urea macrocycles that can self-assemble into solid cylinders or tubular structures affording crystalline materials. These macrocycles consist of two urea groups and two rigid C-shaped spacers. Easy functionalization of this system enables access to bis-urea macrocycle structures that could serve as molecular reactors, coordinating ligands …

Cortical Damage And Disconnection Contribute To Post-Stroke Sensorimotor Impairment, Shafagh Yazdani

Theses and Dissertations

BACKGROUND. Stroke is a cerebrovascular event that causes permanent damage to brain regions and decreases in connectivity (disconnection) between brain regions. Most stroke survivors have permanent difficulties performing functional motor tasks, thus research into how damage and disconnection produce difficulties performing motor tasks can help guide post-stroke rehabilitation. Previous studies have examined the extent to which cortical damage produces motor impairments, but the extent to which disconnection produces motor impairments remains unclear. Furthermore, studies have focused on how motor impairments contribute to difficulties performing motor tasks, whereas the role of visuospatial impairments has received little attention. Neuroimaging techniques for quantifying …

Anthropogenic Influences On Sedimentation In The Chicken Creek Watershed Of South Carolina, Tyler L. Dearman

Theses and Dissertations

Anthropogeomorphic changes in response to destructive agricultural practices followed the arrival of European settlers into the Americas. The southeastern Piedmont physiographic region of the USA was severely affected by erosion and sedimentation following settlement in the 1700s and farming up through the 1930s. Deep floodplain aggradation formed uninterrupted alluvial deposits that extended many km. This research examines anthropogenic impacts of land-use change on valley bottom sedimentation in the Chicken Creek Watershed of South Carolina. Abrupt contacts between pre-settlement floodplain soils and a thick overburden of legacy sediment are common throughout the two-km study reach and provide clear evidence of extensive …

Development Of A Supplier’S Delivery Time And Delivered Quality Performance Index And Assessment Of Alternative Decisions Regarding Underperforming Suppliers For The Aerospace Industry, Clint Saidy

Theses and Dissertations

This study investigates current practices of supplier’s delivery assessment so that a comprehensive index and a cost function model could be properly developed. Following a thorough literature review, a framework was created based on a penalty cost function that integrates both suppliers’ ability to deliver on time, as well as suppliers’ capability to deliver good quality. Afterward, suppliers could then be ranked and placed either in good standing, or transversely on probation. Underperforming suppliers face three potential outcomes based on current literature: (1) switching supplier, (2) increase collaboration, (3) maintaining the status quo. The decision vis-à-vis failing suppliers is based …