Digital Commons Network^™

Near-Ir Spectroscopic Analysis Of The Primary Volatile Composition Of Long And Short-Period Comets, Younas Khan

Dissertations

Comets are among the most well-preserved objects that formed in the protosolar nebula ∼4.5 Gyr ago. Hence, they are important for understanding various aspects of the formation, evolution, and habitability of the solar system. Multiple primary volatiles (molecules directly sublimating into the coma from the nucleus) emit via rovibrational transitions in the near-IR, providing opportunities to calculate their abundances. To date, only ∼50 comets have been characterized for their primary volatiles, with the short-period Jupiter-family comets (JFCs) being significantly underrepresented. In contrast, hundreds of comets have been sampled at optical/UV wavelengths, primarily for the composition of daughter species, leading to …

Understanding The Structure And Dynamics Of Conjugated Polymers By Deuteration And Neutron Scattering, Zhiqiang Cao

Dissertations

Semiconducting conjugated polymers (CPs) open opportunities to develop a new generation of lightweight, printable, low-cost, deformable, and large-area electronic devices. CPs are characterized by complex chain dynamics and heterogeneous molecular structure with large degrees of conformational freedom.

Chain conformation (i.e., chain rigidity and local backbone planarity) dictates the delocalized electron cloud along the polymer backbone which greatly influences the optical and electronic properties of conjugated polymers. For the first time, we indicate that using variable-temperature scattering and spectroscopy characterizations allows confirmation of the single-chain state to measure the molecular chain conformations. We found a critical role of side chains and …

Vicarious Learning And Perceived Self-Efficacy Among Pre-Licensure Nursing Students During Pediatric End-Of-Life Situations, Stephanie Clark

Dissertations

Despite decades of acknowledgement among nursing academics and organizations, end-of-life (EOL) nursing education is significantly lacking. Insufficient EOL care education leaves nursing students feeling ill-prepared to adequately care for clients and their loved ones at EOL. Though the literature reveals a recent increase in didactic and simulation-related EOL education sporadically being integrated into nursing curricula, minimal research addresses important topics of pediatric EOL care and provision of therapeutic communication, considered critical to EOL care. End-of-life clinical experiences, particularly in pediatrics, are limited for pre-licensure nursing students. Though effective, simulations can be costly and timely to execute, are restricted by limited …

Evaluating Middle School English Language Learners’ Science And Literacy Proficiency, Yasemin Ozkaya

Dissertations

The academic success and English proficiency of ELL students are receiving more attention as a result of the growing number of ELL students and the demand for accountability and assessment in education. It is widely accepted that ELL students struggle on state standardized tests because they lack the cognitive academic language abilities needed to succeed on extensive subject evaluations (Thakkar, 2013). According to Abedi and Dietel, ELLs' academic performance lags behind that of other segments of population, and the attainment gap reduces only slightly over time (2004).

The NWEA archival data of 6th, 7th, and 8th grade students who attended …

Mating Burrows In The Fiddler Crab Leptuca Pugilator: How A Key Resource Is Contested, Constructed, And Shared, Zachary Michael Lane

Dissertations

The Atlantic sand fiddler crab, Leptuca pugilator, is found on sandy, vegetated beach across a large portion of the United States’ Atlantic and Gulf of Mexico coasts and is iconic in regions where dense populations of the species occur for its charismatic courtship, competitive, and foraging behaviors. The social dynamics of the species are complex. Reproductively active males maintain mating territories in the dangerous heat of the intertidal zone, away from their food source at the water’s edge, where they inhabit specialized mating burrows. These mating burrows are essential to successful female reproductive success, and when it is time …

Exploring The Fifth Quarter: An Enquiry Into Offal Eating In Contemporary Irish Food Culture, Its History, And Its Future, Niall Toner

Dissertations

Animal offal and organ meats seem to have all but disappeared from domestic cuisine in Ireland, despite the recent renaissance in the country’s food culture. This thesis has examined the extent and nature of the consumption of these comestibles in contemporary Irish food culture, and the perceived decline in offal’s popularity in Ireland in the past fifty years. It also sought to discover whether offal and organ meats might have a place in the future of our cuisine, and whether the consumption of more offal and organ meats in Ireland might contribute towards a more sustainable food production system, and …

Missed And Prior Diagnoses In Children Later Diagnosed With Autism, Maire Diemer

Dissertations

Awareness of autism is rising, yet social determinants of health continue to impact rates, ages of diagnosis, and diagnostic load. Different psychiatric labels carry stigmas; unequal rates of diagnoses may indicate biases in the healthcare system. This study investigates six prior diagnoses (ADHD, disorders of conduct, adjustment, anxiety, mood, and intellectual disability) assigned to children who are later diagnosed with autism. The study investigates how race, sex, and geographic factors were associated with age of diagnosis and diagnostic load. This study utilized a sample of 13,850 children aged 2-10 who were diagnosed with autism on Missouri Medicaid between 2015 and …

Professional Development For Classified Managers Within The Business Services Departments At California Public School Districts, Juliet Castorena Orozco

Dissertations

Purpose. The purpose of this Delphi study was to identify and describe professional development topics required to prepare classified managers in California public school district business services departments as effective leaders as perceived by a panel of experts. This study also sought to identify the degree of importance of each professional development topic and the best strategies to address those topics as perceived by a panel of experts.

Methodology. A Delphi research design was used to identify and describe professional development strategies necessary to prepare classified managers in the business services division of California public school districts. The Delphi panel …

Deciphering Description: A Study Of The Works Of Joseph Conrad, Autumn Pearson

Dissertations

This project analyzes Conrad’s use of description in his narratives in light of the 1897 Preface to ‘Narcissus.’ Conrad’s elevation of description stands in contrast to Gérard Genette’s account of narrative theory but within the space Mieke Bal makes for the reconsideration of description within the theory. Narrative theory provides the terminology for specific narrative moments in which Conradian description can be analyzed—the narrative opening, the narrative pause, and various narrative levels. In addition to analyzing Conradian works, the project traces the evolution of Conrad’s thinking about description throughout the course of his career and invites the reader to rethink …

Predicting Suicide Attempt Histories With Zero-Inflated Negative Binomial Regression: A Combined Psychological And Demographic Approach With Military Personnel, Aleksandr Karnick

Dissertations

Nearly 50,000 individuals die by suicide each year and, despite only representing 7% of the population, military veterans represent nearly 14% of suicides. As a critical public health concern, research has been directed toward identifying risk factors for suicide. Over the last 50 years of research, nearly 3,000 separate effect sizes for suicide risk factors have been identified, but this research has made little progress toward identifying individual suicide risk and predictive capacity remains low. Although research from medicine and traumatic injury suggest that public health interventions that are implemented broadly can be highly effective at reducing risk for other …

Stigma As A Treatment Barrier In Trauma Exposed College Students, Lydia Sigurdson

Dissertations

Exposure to a traumatic event puts an individual at risk for subsequent psychological distress. Though trauma exposure is common in undergraduate students, college mental health services remain severely underutilized. One reason may be stigma associated with mental illness. The current study investigated the role of stigma on treatment seeking behaviors in trauma-exposed college students. Qualifying participants were randomly assigned to one of two stigma conditions. One week following measure completion, participants received an email offering a free, brief, self-guided intervention described with a stigmatizing label (“trauma symptoms”) in one condition, and as a broad problem (“stress”) in the other. It …

A Network Analysis Examining Dissociation And Suicide Risk In Military Veterans And Non-Veterans, Nicole Caulfield

Dissertations

Higher rates of dissociation are related to more severe psychopathology, psychiatric comorbidity, and poorer response to treatment, yet there is limited research examining dissociation as a transdiagnostic factor. In particular, examining dissociation in a Veteran sample is vital, as Veterans have been shown to have higher trauma exposure and dissociation rates than non-Veterans. Dissociation has been linked to several adverse outcomes related to Veterans, particularly suicide, as dissociation may increase the possibility of a suicidal act because of intensified disconnect from the body. However, research examining the relationship between dissociation, suicide, and additional related factors has been limited, given the …

The Impact Of Teach-Back Method On Hospital Readmissions, Rebel L. Heasley

Dissertations

Excessive healthcare costs resulted in the advent of the Centers for Medicare and Medicaid Services Hospital Readmission Reduction Program, where hospitals incur financial penalties for high readmission rates. This suburban hospital reported readmission rates of 10.38% in 2020 and 9.03% in 2021, much higher than the desired Vizient national benchmark of 6.83% or the twenty-fifth percentile. A literature review revealed that using the teach-back method alone or with other discharge activities can reduce hospital readmissions. This project tackled the quality
issue of high readmission rates by addressing patient education at discharge. The quality improvement project translated the use of the …

Evaluation Of A Classroom Management Video Training Package, Avner Fraidlin

Dissertations

To address the concerning implications of inadequate teacher preparation and training in using classroom management, the literature highlights several steps training programs can take. Namely, this includes supplementing training curricula with dedicated courses on evidence-based classroom management practices and providing teachers with performance feedback following guided practice opportunities (Stevenson et al.,2020). Videos which have been used as an instructional tool in teacher education for several decades (Ciani et al., 2021; van Es & Sherin, 2006), have been incorporated as a component in classroom management teacher trainings with positive outcomes (Wilkinson et al., 2020), and feedback has been established as an …

An Action Research Study On Visible Learning Feedback And Motivational Interviewing Concerning Underserved Advanced Placement Students, Lori A. Vaughn

Dissertations

Underserved minority students participating in Advanced Placement (AP) courses encountered increased academic pressures, in addition to inequitable conditions in education. The following study addressed inequity, as well as self-motivation, self-regulation, feedback practices, and student autonomy. The researcher implemented Visible Learning Feedback, an academic intervention, focused on bridging the gap in knowledge (Brooks et al., 2019; Hattie & Yates, 2014). Furthermore, the researcher designed a Motivational Interviewing (MI) pilot program, a client-centered approach concentrated on participant social-emotional well-being (Miller & Rollnick, 2013). The study’s purpose involved improving AP exam scores, increasing post-test essay grades, and raising self-motivation and self-regulation measurements through …

Improving Autonomous Vehicles Operational Performance Using Resilience Engineering, Johan Fanas Rojas

Dissertations

Autonomous vehicles are expected to revolutionize the transportation industry by providing a safer and more efficient means of transportation. However, as autonomous vehicles are deployed on public roads, they are exposed to significant risks, both in terms of safety and system performance. Recent studies have highlighted a range of errors and accidents associated with autonomous vehicles, underscoring the need for a systematic approach to improve their operational resilience. Resilience engineering, a discipline focused on designing and analyzing complex systems to better cope with unexpected events and disruptions, offers a promising framework for addressing these challenges. Despite the potential benefits of …

Learning Finite Mixture Of Ising Graphical Models, Chong Gu

Dissertations

The Ising model is valuable in examining complex interactions within a system, but its estimation is challenging. In this work, we proposed penalized likelihood procedures to infer conditional dependence structure when observed data come from heterogeneous resources in high-dimensional setting. The proposed method can be efficiently implemented by taking advantage of coordinate-ascent, minorization–maximization principles and EM algorithm. A BIC-type criterion will be utilized for the selection of the tuning parameter in the penalized likelihood approaches. The effectiveness of the proposed method is supported by simulation studies and a real-world example.

Telehealth Functional Behavior Assessment In Practice: A Demonstration Of The Clinical Utility Of Dynamic Probability Analyses And Estimates Of Contingency Strength, Lilith Michaele Reuter-Yuill

Dissertations

The spread of SARS-CoV-2 and acceleration of coronavirus disease cases resulted in a global pandemic and presented unique and unprecedented humanitarian issues. Behavior analysts trained in the area of functional behavior assessment offer important services that may assist families to address behavioral challenges that they face during this difficult time. Despite the growing body of evidence of telehealth functional behavior assessments, practitioners still face several unknowns. In Experiment I, a telehealth functional behavior assessment was conducted with three children with autism spectrum disorder. Assessment methods represented a continuum of experimental control from unstructured conditions (no experimental control), structured descriptive assessment …

Nonparametric Tests For Replicated Latin Squares, Joseph Yang

Dissertations

Two classes of nonparametric procedures for a replicated Latin square design that test for both general and increasing alternatives are developed. The two classes of procedures are similar in the sense that both transform the data so that existing well-known tests for randomized complete block designs can be utilized. On the other hand, the two classes differ in the way that the data is transformed - one class essentially aggregates the data while the other class aligns the data. Within these contexts, the exact distributions and asymptotic distributions are discussed, when applicable. The exact distributions are easily computed using the …

Evaluating The Performance Of Estimators In Sem And Irt With Ordinal Variables, Bo Klauth

Dissertations

In conducting confirmatory factor analysis with ordered response items, the literature suggests that when the number of responses is five and item skewness (IS) is approximately normal, researchers can employ maximum likelihood with robust standard errors (MLR). However, MLR can yield biased factor loadings (FL) and FL standard errors (FLSE) when the variables are ordinal. Other estimators are available. Unweighted least squares and weighted least squares with adjusted mean and variance (ULSMV and WLSMV) are known as the estimators for CFA with ordinal variables (CFA-OV). Another estimator, marginal maximum likelihood (MML), is used in the item response theory (IRT), specifically …

Wideband Parameter Estimation Of Overhead Transmission Lines From Terminal Measurements, Fahad J. Alqahtani

Dissertations

The accurate and efficient determination of electrical parameters of transmission lines is essential when performing computer-aided analyses of power systems, including power-flow, state estimation, short-circuit, transient stability, power quality, and electromagnetic transients.

In this dissertation, a novel technique for wideband parameter estimation of frequency-dependent single-phase, three-phase transposed, and three-phase untransposed overhead lines, is proposed. The proposed technique utilizes terminal measurements of transient voltages and currents and is based on an analytical approach to solve the frequency domain 2-port nodal model of the line for the series impedance and shunt conductance per unit length as a function of the frequency. The …

Parenting And Students' Gpa In The Latino Population: An Exploratory Study, Carolina Arboleda

Dissertations

The present study experimentally investigated Latino high school students’ grade point averages (GPA) and the parenting styles used by their parents based on Baumrind’s (1968, 1971, 1989, 1991) theory of parenting behaviors. Participants (N=52) were asked to take a survey of 62 questions total addressing three parenting dimensions as measured by the Escala Parental Breve to categorize their parents’ behaviors into parenting styles. Participants also responded to demographic questions such as English proficiency, household income, parents’ education level, and other relevant factors impacting parenting and GPA. Results from the study were limited as there was a limited number of participants; …

Leadership Identity Development Among Aspiring Women Leaders In Higher Education: A Phenomenological Study Of Formal Mentoring, Malia E. Roberts

Dissertations

Men have held the majority of presidencies, vice-presidencies, deanships, and other top administrative positions on college campuses since 1950 (Parker, 2015). The disproportionately low representation of women holding leadership roles in higher education is even more urgent considering few women ever reach the senior most leadership levels (Hannum et al., 2015). As such, the American Council on Education not only identified the need to increase the presence of women in leadership positions and to cultivate a pipeline of future leaders, but also the need to provide formal leadership training opportunities for women (Howard & Gagliardi, 2018). While various higher education …

Seminarians In The Person-Of-The-Therapist (Pott) Training : A Phenomenological Study, Tomichan Moonnanappillil

Dissertations

This dissertation presented a transcendental phenomenological study conducted among eight seminarians in one of the theological schools in Southern Texas, who attended the personof-the- therapist (POTT) training program during the fall semester of 2019. This study aimed to examine seminarian participants' experiences in POTT training, their influence on their selfawareness, and their impact on their emotional maturity and the ability to make responsible life choices. The study was guided by an existential-humanistic philosophical orientation as an overarching theoretical orientation with the subjective epistemological worldview and socialconstructionism paradigm. Findings indicated POTT training positively impacted seminarian participants' human formation, which was foundational …

Improving Second Language Learning Through Performance-Based Assessment Practices, Maria Granados

Dissertations

From the time of the No Child Left Behind Act (2001) to the present day, standardized testing has become the benchmark measure for student assessment and school accountability in the United States. Multilingual learners are a vulnerable population with more testing and accountability requirements than mainstream students. Not only are they required to learn a second language, but they are also assessed within the same standardized testing paradigms as their peers - native speakers of the English language. This study aimed to examine and evaluate the benefits of instructional practices and assessments that provide multilingual students and teachers prompt and …

Pathways To Offending: Domestic Sex Trafficking, Julie Williams

Dissertations

Multidisciplinary professionals across criminal justice, public policy, education, and health and

human services have all attempted to understand the complex phenomenon of sex trafficking to assist victims, correct offenders, and prevent future abuse. However, current research has struggled to agree on terms, definitions of terms, best measures of prevalence, and recommendations to address sex trafficking in the United States. This review of current literature aims to offer a synthesized framework to conceptualize domestic sex trafficking perpetrator behaviors (what they do), their uses of force, fraud, and coercion (how they do it), and their motivations and justifications/rationalizations for those behaviors (why …

Racial Identity Within The Indo-Caribbean Community: A Proposed Model, Alyssa Ramdihal

Dissertations

Part of the South Asian diaspora, the Indo-Caribbean community is a particularly marginalized minority community as a result of colonialism. Indo-Caribbeans are only considered the majority ethnic group in the country of Guyana, where there is a high rate of suicide mostly among Indo-Caribbean men who view it as a behavioral expression of emotional distress. From the research available, the Indo-Caribbean experience of mental health access in the Caribbean is limited due to improper collection and reporting of demographic information. Indo-Caribbeans who were raised from a young age or born outside of the Caribbean community region, often experience discrimination and …

A Rudimentary Framework Of The Emergence Of Naturally-Occurring Mentorships, Aaron S. Baker Cervantes

Dissertations

Cross-age relationships between youth and adults that develop organically outside the construct of youth programs are examples of natural mentoring relationships. In the United States, research has demonstrated the positive impact of these mentorships. Scholars have begun applying concepts learned from natural mentoring to formal mentoring schema; however, much work is yet to be done in examining how these relationships emerge and the factors that impact their development. Designed in partnership with a private secondary school in rural México, this study aimed to unpack these questions using a grounded theory approach. Current students, alumni, and teachers participated in the study …

Identity And Public History, William Holderfield

Dissertations

This paper considers the creation of identity and self through interaction with museums. By understanding whether there is a correlation between how someone views themselves and their placement within society and the national narrative, consideration of alternative actions in combating social issues is possible. Likewise, through this knowledge, there is the potential for museums and public spaces to become of greater interest as places where topics relating to social concerns are presented and discussed. A qualitative research method was used to gather evidence of the correlation between identity and museums and revealed a relationship between identity and self-understanding and museum …

The Mobility Of Long-Lived Radioisotopes And Their Burial In The Marine Environment, Neil Redmond

Dissertations

Marine sediments record chemical signals that reflect past environmental conditions. It is important to establish how these signals are created and whether they may be altered over time so that they can be useful for reconstructing ocean history. Measurements of uranium isotopes are used as a novel proxy for sedimentary diagenetic processes (Chapter 2). Because ²³⁴U can be ejected from mineral lattice during the decay of ²³⁸U, it creates a pool of U in porewater that is potentially mobilized and then deposited elsewhere in the core. We found that alpha-recoiled ²³⁴U is sensitive to differences in sediment …