Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental toxicants found in anthropogenic mixtures such as crude oil, air pollution, vehicle exhaust, and in some natural combustion reactions. Single PAHs such as benzo[a]pyrene (BaP) also impact fish behavior when animals are exposed in early life stages and for short periods of time. Aquatic animals such as fish may encounter BaP through road runoff and oil spills, but few studies have examined the impact of aqueous exposure on adult fish, and fewer have examined the resulting fitness-relevant behavioral consequences of BaP and PAH mixtures and their long-term persistence. This dissertation targets this gap in the literature by examining how aqueous exposure to BaP influences anxiety-like behavior, learning, and memory in adult zebrafish, and how parental exposure to the PAH mixture, crude oil, combined with hypoxia affects social and exploratory behavior in unexposed larval zebrafish. We found that learning and memory were not affected by 24 hour exposure to BaP, that anxiety-like behavior was minimally affected, and that locomotor parameters such as distance moved and times spent in darting and immobile states were significantly altered by exposure to BaP. Additionally, we found that parental exposure to crude oil and hypoxia decreased larval velocity. Additionally, …

Supply chain transparency is principally focused on a company's efforts toward disclosing information about their products, and their supply chain operations to the public. Essay 1 is a conceptual paper that examines the risks of disclosing supply chain mapping information to consumers and proposes an approach to developing risk mitigation strategies. This essay also develops a set of supply chain mapping conventions that support the development of an agility-focused supply chain map. Essay 2 employs an experimental design methodology to examine the impact of disclosing the ethnicity of a supplier on consumers' behaviors, while also capturing the extent to which a consumers' ethnic identity and prosocial disposition influence their behaviors. Finally, also using an experimental design, Essay 3 analyzes consumer outcomes based on disclosing no, partial, and full supply chain transparency information, and accounts for heterogenous consumer traits such as the importance of information to a consumer and their perceived quality of information. Collectively, these essays advance the body of knowledge that seeks to understand the risks and benefits of supply chain transparency, by conceptually identifying risks and proposing an approach to minimize the risks associated with supply chain transparency, and by illuminating the conditions that prompt favorable consumer outcomes.

Student behavior and classroom management are consistently identified as top reasons teachers leave the profession. A descriptive phenomenological study was conducted in a suburban school district in north Texas to identify how teachers perceive the deficits in their classroom management knowledge and to provide school leaders with data to guide plans for professional learning about effective classroom management strategies. Findings are based on both teachers' and principals' perceptions of supports that are needed or provided. Nine teachers (three elementary, three middle, and three high school) and six administrators (two elementary, two middle, and two high school) were interviewed using semi-structured interview protocols. Data were analyzed using seven a priori codes from which themes were developed. The findings showed that teachers generally do not feel well-prepared to address student behavior and classroom management. Emerged themes from both teacher and principal interviews identified deficits in professional learning received from their teacher preparation program, campus leaders, and district leaders. The top reasons why teachers struggled with student behavior and classroom management were: (a) application of learning, (b) deficits in support, (c) deficits in training, (d) physical and emotional toll, and (e) student deficits in social skill development. To help teachers feel better prepared …

Helmut Friedrich Lachenmann is a German composer of contemporary music. In his 1980 work for piano, Child's Play, Lachenmann develops one of his own signature concepts, musique concrète instrumentale, in which he uses the "standard" (not prepared) piano in non-conventional and innovative ways to explore new sounds and techniques. This dissertation is a pedagogical study that provides a teaching guide for educators who would like to use Child's Play as an introduction to some of the sounds and techniques of contemporary music for their late intermediate students. In order for educators to effectively guide their students through Child's Play, they should understand the sonorities of musique concrète instrumentale as well as the extended techniques it requires. This dissertation addresses those needs through three principal means. First, it introduces Lachenmann's musique concrète instrumentale and classifies the various sonorities into three types: descriptive, contrasting, and extended. Second, it analyzes and discusses technical elements in the cycle, including notational considerations, pedaling, and sound effects. Last, the dissertation provides pedagogical suggestions to help students master these technical elements. By studying and playing this piece, students not only become intimately familiar with some of the many sounds they are able to produce on the piano, …

Linguistic racism is faced by non-native customers due to their different language style when they go through the service exchange process. Despite its prevalence and importance, there is a dearth of research about linguistic racism in the marketing literature, especially from consumers' perspectives. This dissertation thus aims to address this gap by focusing on consumers' cognitive and affective responses as a result to their linguistic racism experiences when they interact with service employees (native speakers) from the host country. Toward this goal, first (Essay 1), a qualitative study is performed to anchor the dissertation in the customers' real-life experiences and to help identify key associated themes which are further empirically examined (Essay 2 & 3) in this three-essay format dissertation. Essay 2 empirically investigates if the identity assignment through ones' language style makes customers feel stigmatized and influence their psychological well-being. In addition, how these experiences subsequently influence their inclination to use technology-mediated interfaces. Similarly, the main objective of Essay 3 was to employ a sociological perspective to examine the impact of language-based chronic social exclusion on non-native customers' psychological and behavioral responses in the marketplace. Moreover, their intention to pay higher tip as a refocusing strategy when these customers …

This research study examined the implementation of an extended reality (XR) lab on a community college campus to facilitate student and faculty access to immersive learning resources. The study, conducted during one skills day, involved 46 students and was designed to understand if integrating immersive VR into emergency medical technician (EMT) education could enhance learner confidence and motivation, develop problem-solving and analytical thinking skills, and thus connecting the classroom learning with real-world application. The majority of participants reported increased motivation and engagement, alongside improvements in learning outcomes like knowledge retention and skill development. Applying the unified theory of acceptance and use of technology (UTAUT) model revealed performance expectancy, effort expectancy, social influence, and facilitating conditions as key determinants of VR adoption in EMT education. While no significant overall performance enhancement was observed, VR training showed potential to boost motivation, confidence, and specific performance aspects. Furthermore, student perceptions towards VR in EMT education were largely positive, thereby suggesting its utility in immersive scenario training, skill acquisition in a risk-free environment, enhancing learner engagement, and real-world situational preparedness. VR demonstrated promise as a transformative tool in EMT education, necessitating further research to fully exploit its potential in diverse learning environments.

The age-cutoff regression discontinuity design (RDD) has emerged as one of the most rigorous quasi-experimental approaches to determining program effects of prekindergarten on literacy and numeracy outcomes for children at kindergarten entry. However, few pre-K meta-analyses have focused attention on validity threats. The current random-effects meta-regression tests the moderating effects of prominent threats to validity, selection bias and sensitivity, on impact estimates generated from age-cutoff regression discontinuity studies from large-scale programs. Results from averaging dependent standardized mean difference effects suggested small positive moderating effects of total attrition and robust 3-month bandwidths on reading effects, but not on math. However, these results were not statistically significant. In contrast, results generated from robust variance estimation yielded a small statistically significant association between total attrition and math effects. These mixed results may warrant further research on prekindergarten evaluation methodology, evaluation estimation methods, and the totality of evidence used to inform policy.

Using queer and Afrofuturist frameworks, this Black feminist qualitative study explored queer Black pre-and in-service teachers' cultural and intersectional practices as they navigated traditional heteronormative educational spaces. This research study relied on counternarratives and storytelling and drew from Afrofuturism to understand the use of their lived experiences to counter monolithic queer narratives. The queer Black teachers in this study examined and negotiated how their Blackness and queerness showed up in teacher preparation programs (TPP) and K-12 classrooms. Moreover, they eventually refused to hide or censure their authentic selves. An analysis of the narratives and counternarratives showed that queer Black teachers drew from ancestral traditions to create queer Afrofuturist spaces in TPPs and educational places. Furthermore, due to their queer Black intersectional approaches, their classrooms, assignments, curriculum, and pedagogy disrupted normative teaching practices. Implications, recommendations, and future research are discussed.

In this dissertation, I explored the effects of developmental hypoxia on heart contractility in three separate species of ectotherms: the common snapping turtle (Chelydra serpentina), the American alligator (Alligator mississippiensis), and the zebrafish (Danio rerio). I began with the common snapping turtle and tested whether the utilization of the sarcoplasmic reticulum was altered in response to developmental hypoxia. In the next two chapters, developmental hypoxia of the American alligator was explored studying how the cardiac tissue was affected, specifically in physiological stressors, sarcoplasmic reticulum utilization and sensitivity to pharmacological increases in contractility. The last chapter explored how zebrafish heart contractility was altered in response to chronic hypoxia from egg to adult. Findings from these chapters suggest that while developmental hypoxia did alter cardiac contractility, it did not alter the response of the heart to physiological stressors such as increased heart rate or under hypoxia. Overall, these findings contribute to increasing the current understanding of how developmental hypoxia alters the cardiovascular system but with an emphasis on the cardiac tissue level.

This dissertation discussed the impact of the North Carolina Tort Claims Act and the history of governmental immunity that has protected school districts and school employees in North Carolina. The research question addressed was: how have North Carolina state courts interpreted the North Carolina Tort Claims Act in litigation against North Carolina school districts and their employees? The North Carolina Tort Claims Act provided citizens with a vehicle to sue local governmental agencies and their employees, such as school employees. The act also provided immunity for schools, especially for excessive damages in the case of negligence by an employee. The study examined how state courts have responded to different plaintiffs since the passage of the North Carolina Tort Claims Act in 1951. The decisions in the cases analyzed have been mostly favorable to schools, which has strengthened immunity for school employees. There were four legal aspects addressed by the courts after the passage of the North Carolina Tort Claims Act either most frequently or were unique to the case law of North Carolina. Those legal aspects were tests of school districts' governmental immunity; contributory negligence on the part of the plaintiff; the official capacity of school employees in lawsuits; and …

We investigated the modifying effects of ultraviolet (UV) light and chemical dispersant (Corexit 9500A) on crude oil toxicity in juvenile mysids (≤ 24 h) (Americamysis bahia) and larval red drum (24-72 hpf) (Sciaenops ocellatus). These results demonstrate that crude oil toxicity significantly increases with co-exposure to environmentally relevant UV levels in both species, indicating photo-induced toxicity. This toxicity was further exacerbated by the application of chemical dispersants which increased the dissolution and concentration of oil-derived polycyclic aromatic hydrocarbons (PAHs) in test solutions. To better understand the mechanisms and initiating events of this observed photo-induced toxicity, the incidence of apoptotic cell death and global transcriptomic changes were assessed in larval red drum (24-72 hpf) following co-exposure to crude oil and UV. These results showed that co-exposure to UV and low concentrations of crude oil (<1 µg/L ∑PAH50) induced apoptotic cell death in skin and eye tissue and altered transcriptomic pathways related to visual processing and dermatological disease. To link these cellular and molecular impacts of photo-induced toxicity to apical endpoints of ecological performance, sublethal impacts to growth, metabolic rate, and visually mediated behaviors were explored in larval red drum at 2 developmental stages. These results suggested that earlier life stages may …

The purpose of this qualitative case study was to define and describe the work of external instructional design consultants. Study participants included seven instructional designers with varied educational backgrounds and work experience who work in a variety of contexts supporting clients in the design and delivery of learning experiences. All seven participants completed an initial survey with demographic and background questions. Five participants then took part in semi-structured interviews. Collected data was coded using both deductive and inductive methods with each case considered individually before combining the data for analysis across cases. Study findings support previous research suggesting that the work of instructional designers is dependent on context. Results further indicated that external instructional design consultants regularly engage in project management, communication and collaboration, and the analysis and evaluation components of the instructional design process, all in keeping with existing literature. External instructional designers differed in that they do more sales-related work, and, in the analysis process, focus more on client needs than learner characteristics. Study participants were invested in creating high quality, engaging learning experiences, while also willing to accommodate the unique challenges facing any given client. The study findings suggested that prospective employees' instructional design knowledge is of …

Online and hybrid onboarding, or new-hire training and assimilation, has grown increasingly common in corporate settings, especially since the COVID-19 pandemic. This study explores how perceived onboarding experience, work locus of control, occupational self-efficacy, and employee engagement differed between those who onboarded with in-person, hybrid, or online methods. This study also explores how work locus of control could moderate these relationships and examines the relationships between employee engagement and onboarding experience, locus of control, and self-efficacy. This study used quantitative research methods in the form of a self-administered online questionnaire aimed at corporate employees who had onboarded within the previous 18 months. One hundred fifty-three employees completed the survey. It was found that no significant difference in the variables existed between modalities, except for the task characteristic subscale of perceived onboarding experience in which scores were lower for those onboarded in-person. However, work locus of control was found to significantly moderate the relationships between onboarding modality and experience, locus of control, and self-efficacy. Additionally, employee engagement was increased with higher perceived onboarding experience, more internal loci of control, and higher self-efficacy. In addition to the research questions, demographic data were also explored. It was found that perceived onboarding experience was …

In this dissertation, I theorize on how gaslighting manifests in managerial and organizational settings. I discuss the process of gaslighting and how the use of various manipulation tactics manifests between people in organizations over time. I take three distinctive approaches to study this complex phenomenon. First, using a rich case study, I develop new theory to explain how one notorious child molester was able to sustain a career for decades while assaulting hundreds of children and young women. In doing so, I introduce the concept of gaslighting which previously has only been rigorously applied to intimate interpersonal relationships in domestic (e.g., at home) settings. In essay 2, I expand on the individual level theory developed in essay 1 to develop a more generalized theory of gaslighting in organizations. I situate gaslighting within a nomological net of related constructs and illustrate how gaslighting is a unique construct with different antecedents and consequences that occurs in organizations more often than it should. In my final essay, I build on one of the propositions developed in essay 2 and empirically test what antecedents are likely to influence whether or not a firm is accused of gaslighting on Twitter. Through doing so, I find …

Previous researchers of Jewish history in the Roman Empire have imperfectly employed Greco-Roman sources to describe Roman perceptions of Jews and Judaism by relying on a handful of Greek and Latin written and visual components without attempting to quantify or comprehensively explore this abundant material. Utilizing both quantitative and qualitative methodologies, this dissertation analyzes the vast array of Greco-Roman written and visual sources about Jews and Judaism from the first century BCE to the end of the third century CE. While qualitative reviews of Greek and Latin texts help eliminate potential inconsistencies in the data, computational tools like text-mining analysis quantify the information into calculable results. The addition of visual source material into the framework helps further refine the quantified textual material. Reviews of this data reveal the general traits imperial leaders within the Roman Empire knew about the geography and history of Judaea, Jewish religious beliefs and cultural practices, and Jewish communities in general. Further reviews of the data note regional and, more importantly, temporal variations connecting them to changes both in imperial rule and Judaism. This process presents a more detailed and coherent conception of Roman knowledge of Jews and Judaism than scholars have previously recognized. In addition …

The purpose of this quantitative study was to further explore pedagogical balance using multidimensional scaling and epistemic network analysis. Teacher shortages and attrition remain a critical issue for the future, and simulated classroom environments like simSchool can provide teachers additional training to help improve teaching confidence and teaching experience. Two different data sets were analyzed at various time before and after simSchool use to see how pre-service teachers rate themselves in 8 areas of teaching as defined by the Survey of Teaching Skills. Multidimensional scaling was utilized to see how teaching confidence and teaching experience align with no simSchool use, 90 minutes of use, and 8 hours of use. Epistemic network analysis was utilized to look at the cognitive structures of different groups to determine any differences. The findings are discussed with future research directions provided.

Logistics 4.0 suggests that increased automation can enhance performance, while Logistics 5.0 emphasizes the advantages of a modern workforce that combines humans and emerging technologies. However, the logistics industry needs a deeper understanding of human factors, an area that has been overlooked so far. To bridge this research gap, this dissertation investigated distracted driving behavior among individuals involved in transportation and logistics-based applications. This investigation employed both qualitative and quantitative research methods. Essay 1 focuses on a systematic literature review (SLR) that comprehensively analyzes published research on self-response studies regarding distracted driving behavior. The study identifies five overarching categories of distractions: (a) cell phone-related, (b) technology-related, (c) nontechnology-related, (d) psychological, and (e) personality. The findings underscore the substantial research conducted on self-reported distractions associated with cell phones and technology. Essay 2 employs the protection motivation theory (PMT) to develop hypotheses that predict the engagement of young drivers in texting while driving (TWD). In addition to TWD, the survey also included cognitive failure to examine the indirect effects of PMT on TWD within a mediation framework. The results, obtained through structural equation modeling with 674 respondents aged 18-25, indicate that several factors including response cost, threat vulnerability, cognitive failure, self-efficacy, and …

Demand for the skill of critical thinking is extensive in both higher education and in the workforce. The purpose of the current research is to examine the relationship between critical thinking educational efforts (e.g., programs incorporating high impact practices) and higher education student outcomes. For this study, student outcomes were defined as cumulative grade point average and student program retention. The study used existing data which were obtained from a large public research university in the southwest United States. The study found that higher critical thinking was significantly associated with higher overall GPA, and this relationship was stronger in males as compared to females. However, students' critical thinking was not significantly related to program retention. Findings from this study appear to confirm previous studies indicating a positive relationship between students' ability to think critically and GPA. The study also suggests that elements promoting critical thinking can be successfully embedded into undergraduate curricula through various means, including the use of high impact practices.

The objective of this dissertation is to first identify if there are any academic research gaps in our understanding of the medical supply chain and secondly to understand the role and impact of logistics on the human organ transplant process. The first essay identifies the current status of medical supply chain literature and provides future direction for improving the medical supply chain. This was accomplished by preforming a systematic literature review and a bibliometric analysis from 2,160 publications was conducted. The second essay explores how logistical aspects impact transplant logistics performance and the quality of life for the transplant recipient. Survey data was collected from medical professionals and analyzed using structural equation modeling. The third essay identifies the factors are influencing the number of donor kidneys discarded each year. A retrospective analysis of all deceased donor kidneys procured in hospitals in UNOS region 4 (Texas and Oklahoma) from January 1, 2001, to June 28, 2021, was conducted. Data was analyzed using multinomial logit regression and panel data analysis. As a result, we identified several medical and logistics factors that have influenced the number of donor kidneys discarded in the United States.

The purpose of the study was to examine and evaluate the extent to which the supportive conditions (collaboration, teacher efficacy, shared leadership, and trust) were present in the district's current professional learning communities (PLCs) model, and whether teachers perceived the supportive conditions to be related to improving their instructional practices. This mixed-methods study used Pearson correlation coefficient, multiple regression, and focus group interviews to concurrently triangulate data to answer the research questions. The sample from this study was identified from 600 middle school teachers. Survey participants included 139 teachers and each of the four focus group interviews contained 6 teachers for a total of 24 teachers. Of the four supporting conditions analyzed, trust generated the highest mean (M = 3.41). Results from this study indicate that the supportive conditions for PLCs have a strong correlation (0.10) with the studied district's current PLC model and each specific supporting condition elicits a targeted aspect of professional learning that has a significant impact on teacher instructional practices. Recommendations for future studies include the expansion of this study to include elementary and high school participants and to extend this study to a larger scope of interested districts seeking to improve their PLC structures for …

This research aims to examine current practices in gifted and talented educator professional learning, as well as teacher attitudes, beliefs, and experiences towards gifted education in order to explore opportunities to further develop and improve professional learning structures. Through a qualitative methodology following the constructivist-interpretivist paradigm, this research utilizes a phenomenological interview design in which data from educator interviews are examined through thematic analysis. To support and further extrapolate on the feedback from the interviews, this research also includes a document analysis of the published descriptions of 30-hour educator training required for those providing GT services in the state of Texas. The thematic analysis of interviews identified three major themes and two minor themes after engaging in a deep analysis of the interview transcriptions. These major themes are the (1) utility of professional learning, (2) shared control of learning, and (3) understanding the whole student. Minor themes are (i) long-term career growth and (ii) role of professional support networks and connections. Results of the document analysis illustrate that the most frequent descriptions are associated with the abilities participants will take from the learning. Within this descriptive code, most of the language focused on learner competence, while few of the descriptions …

The study explores the effectiveness of multimodality teaching using the 4MAT Model. A meta-analysis was conducted with empirical studies on instruction via multimodality teaching in preschool, K-12, and higher education. The studies in the meta-analysis involved an experimental and control group. The control group received traditional teaching lessons, and the experimental group received multimodality teaching. A text analysis was conducted to examine the trends in the advantages of the 4MAT model versus traditional methods. The literature review analyzed the cognitive theory of multimedia learning, advances in multimedia teaching effectiveness assessment, transforming traditional teaching through the 4MAT model, 4MAT model and learning, the importance of multimodality teaching, the origin of multimodality teaching, the 4MAT model, and multimodality teaching and student achievement. This research aimed to determine a better understanding and increase learning achievement by using the 4MAT model versus traditional teaching methods.

Manually grading essays and providing comprehensive feedback pose significant challenges for writing instructors, requiring subjective assessments of various writing elements. Automated essay scoring (AES) systems have emerged as a potential solution, offering improved grading consistency and time efficiency, along with insightful analytics. However, the use of AES in English as a Second Language (ESL) remains rare. This dissertation aims to explore the implementation of AES in ESL education to enhance teaching and learning. The dissertation presents a study involving ESL teachers who learned to use a specific AES system called LightSide, a free and open text mining tool, to enhance writing instruction. The study involved observations, interviews, and a workshop where teachers learned to build their own AES using LightSide. The study aimed to address questions related to teacher interest in using AES, challenges faced by teachers, and the influence of the workshop on teachers' perceptions of AES. By exploring the use of AES in ESL education, this research provides valuable insights to inform the integration of technology and enhance the teaching and learning of writing skills for English language learners.

Goal and incentive alignment are a means of establishing collaborative behavior in supply chains. Essay 1 examines goal and incentive alignment at the strategic level in the purchasing process. It employs survey research in conjunction with structural equation modelling to examine the source selection strategy as a means of aligning the goals of the offeror with those of the buyer. Essay 2 examines goal and incentive alignment at the tactical level. It uses discrete event simulation to explore how the pursuit of localized profit objectives affects the global profitability of a supply chain. Lastly, Essay 3 examines goal and incentive alignment at the operational level. By employing a hybrid simulation approach to model a complex product refurbishment process, this research demonstrates that evaluating subprocesses based solely on their throughput does not equate to greater cost savings for the company at the focal point of this case study. These essays contribute to the body of knowledge in several ways. To the best of the author's knowledge, Essay 1 demonstrates the first empirical linkage, in the realm of public procurement, between the fear of a bid protest and the appropriateness of the sourcing strategy. Similarly, Essay 2 represents the first adaptation of …