The aim of the study was to identify the factors that have an influence on the completion rates of undergraduate students in the fields of science, technology, engineering and mathematics (STEM). Using Tinto's retention rate theory as the theoretical foundation, data were collected from freshman who were enrolled in the years 2005 to 2008. Results showed gender and first-generation status were significant predictors of STEM completion and time taken to complete the degree. Institutional bias played a role in race/ethnicity not being a factor affecting completion rates, as this study was conducted at a Predominantly White Institution. SAT scores and first and second-year college GPA showed to have the most prominent influence on both STEM completion rate and time taken to complete the degree. Females with higher first-year college GPA and higher high school rank finished faster. Similar results were found with first-generation students as well. Students belonging to ethnic minority groups with higher SAT scores and college GPA had greater success in STEM fields as well. The study results can be used to increase completion rates of underrepresented students in the STEM fields, given what we know about the interactions between underrepresented student groups and the most important predictors.

This dissertation work is a study of the growth kinematics, synthesis strategies and intrinsic properties of InSb nanowires (NWs). The highlights of this work include a study of the effect of the growth parameters on the composition and crystallinity of NWs. A change in the temperature ramp-up rate as the substrate was heated to reach the NW growth temperature resulted in NWs that were either crystalline or amorphous. The as-grown NWs were found to have very different optical and electrical properties. The growth mechanism for crystalline NWs is the standard vapor-liquid-solid growth mechanism. This work proposes two possible growth mechanisms for amorphous NWs. The amorphous InSb NWs were found to be very sensitive to laser radiation and to heat treatment. Raman spectroscopy measurements on these NWs showed that intense laser light induced localized crystallization, most likely due to radiation induced annealing of defects in the region hit by the laser beam. Electron transport measurements revealed non-linear current-voltage characteristics that could not be explained by a Schottky diode behavior. Analysis of the experimental data showed that electrical conduction in this material is governed by space charge limited current (SCLC) in the high bias-field region and by Ohm's law in the low …

Personality assessments have a long history in psychology and have become the backbone of the human capital management industry, with the Big-Five model being the most prevalent. The central criticism of personality assessments for employment decisions is validity of responses since applicants for employment often endorse items to make themselves more desirable for hire, referred to as faking behavior. The present study examined faking behavior using the Assess Personality Survey (APS). Using a sample of applicant and incumbent data (N = 8,020), the objective was to identify response difference between applicant and incumbents, and the prevalence of faking behavior in applicants. Latent class analysis (LCA) was used to compare groups. Results indicate a clear distinction between applicant and incumbent response patterns. Additional analyses suggest 6 classes of testing patterns among applicants, and results are compared with previous faking identification procedures to improve criteria used to establish faking behavior in respondents.

Collaborative writing technologies such as Google Docs is believed to be a helpful tool in supporting the development of constructivist learning environments. However, not much research has been done among special populations outside the United States. This dissertation examines how using google docs can enhance collaborative learning among non-native English-speaking students at a university in Oman. A total of 52 students participated in this study, where they completed a collaborative writing activity using Google Docs. This exploratory study yielded quantitative as well as qualitative data. Interviewees shared their experience of using Google Docs for the collaborative writing activity. The research shows that Google Docs promoted collaborative interactions among students, such as learning from each other and communicating with the teacher. Interestingly, the data indicate that students used alternate social media such as WhatsApp to communicate with their group mates regarding the collaborative writing activity. Overall, the results obtained here confirm that the Google Docs can be used to enhance collaborative learning among non-native English-speaking students.

The goal of this study was to investigate visual sources of nutrition information relied upon by young adults, specifically college-aged students between 18-30, as this is an under-represented population within current academic literature. A sample of more than 700 18- to 30-year-old college students were surveyed regarding their use of nutrition-driven information, with specific questions regarding the participants' awareness and use of the Food and Drug Administration's standardized nutrition facts labels, as well as the use of smartphone applications for tracking one's food and beverage consumption on a regular basis. Using structural equation modeling, a statistically significant theoretical model was developed with regards to individuals finding greater long-term satisfaction in their dieting efforts if they tracked their consumption on a regular basis, with even greater significance being found through the aid of smartphone applications for recording consumption. An analysis of the content of three online diet and exercise-driven brands was also conducted to determine the currently optimal social media platform for nutrition information exchange, and to identify the type of diet-driven information that generates the greatest amount of engagement within an online network. Of the social media platforms analyzed, Instagram proved to be the most optimal for nutrition information-exchange, and …

The Texas Stream Team (TST) is one of an increasing number of citizen science water monitoring programs throughout the US which have been continuously collecting surface water quality data under quality assurance protocols for decades. Volunteer monitoring efforts have generated monitoring datasets that are long-term, continuous, and cover a large geographic area - characteristics shown to be valuable for scientists and professional agencies. However, citizen science data has been of limited use to researchers due to concerns about the accuracy of data collected by volunteers, and the decades of water quality monitoring data collected by TST volunteers is not widely used, if at all. A growing body of studies have attempted to address accuracy concerns by comparing volunteer data to professional data, but this has rarely been done with large-scale, existing datasets like those collected by TST. This study assesses the accuracy of the volunteer water quality data collected across the state of Texas by the TST citizen science program between 1992-2017 by comparing it to professional data from corresponding stations during the same time period, as well as comparing existing and experimental data from a local TST partner agency. The results indicate that even large-scale, existing volunteer and professional …

Despite the variety of successful reports of the preservation, recovery, and identification of archaeological proteins in general, there are few positive reports regarding mass spectrometry-based identification of ceramic-bound proteins. In large part, this shortage is due to the lack of consideration for the unique taphonomic histories of such residues and, in general, methods development. Further, because negative results are rarely published, there is no baseline to which results can be compared. This paper attempts to address these challenges via a multi-pronged approach that uses mass spectrometry and complementary approaches to evaluate ceramic-bound protein preservation in both controlled, actualistic experiments, and in archaeological artifacts. By comparing the results obtained from protein-spiked, experimentally-aged ceramic to those obtained from both faunal and ceramic archaeological materials, an enhanced perspective on protein preservation and subsequent recovery and identification is revealed. This perspective, focusing on taphonomy, reveals why negative results may be the norm for ceramic artifacts when non-targeted methods are employed, and provides insight into how further method development may improve the likelihood of obtaining positive results.

For musicians of all kinds, practice is an essential component in establishing and refining their skills. How a musician learns the art of practicing, and at what point in their musical and cognitive development can vary drastically. The purpose of this research is to understand how two groups of musicians, undergraduate vocal performance majors and undergraduate piano performance majors, developed (or consequently failed to develop) their respective knowledge pertaining to effective practice prior to entering the university setting, and how their practice habits changed (or consequently failed to change) after beginning study with a university instructor. This is accomplished by comparing the practice habits of the two groups prior to entering the university setting, and, after gaining admission into the degree program. Findings are supplemented with recent research pertaining to the study of learning and various types of practice.

This multiple case study examined the experiences of elementary L2 learners who received instruction in either reciprocal teaching or the think aloud strategy (TAS), and identified patterns of use that emerged from participants' employment of the strategies. The three L2 participants took a pre- test and a posttest, were recorded using the strategies, and responded to interview questions about the strategies. Using qualitative data analysis techniques, four themes emerged from analysis of the data, including; talking like a teacher, I know what I know, established strategies, and declines to use the steps in the strategy. Implications from these findings suggest that the discussion facilitated by reciprocal teaching assists elementary L2 participants in better understanding the text and also supports their language acquisition, whereas TAS does not facilitate discussion. Further, even though reciprocal teaching promotes discussion, teacher assistance during discussion is necessary. Finally, it is essential that teachers are mindful of students' understandings of topics and the difficulty of texts used when students are learning the strategies.

Kaikhosru Shapurji Sorabji (1892-1988) was an English composer-pianist of Parsi descent. Although he composed many works for piano, these compositions remain largely unknown to the public due to the composer's self-imposed 40-year ban on public performances of all his works and the immense technical difficulty of his music. This research proposes a comparative study of Sorabji's two versions of Rapsodie espagnole de Maurice Ravel-Transcription de concert pour piano (1923, 1945). These transcriptions are based on Ravel's orchestral work and are different in terms of the style of their arrangements: the 1923 version is more of a literal transcription, whereas the 1945 version has been expanded upon the former. This dissertation compares the differences between the two versions, as well as identifying how Sorabji infused his own style into the 1945 transcription. This study relies on primary sources including writings and manuscripts of Sorabji, and secondary sources such as articles on interpreting Sorabji's piano works and biographies about Sorabji.

The purpose of this study was to investigate direct and interaction effects of cultural intelligence and social support on the adjustment of international students to U.S. higher education. Hierarchical multiple regression analyses were conducted to test (a) if cultural intelligence was a predictor for adjustment of international students to U.S. higher education; (b) if social support was a predictor for adjustment of international students to U.S. higher education; and (c) if there was an interaction effect between cultural intelligence and social support on international students' adjustment to U.S. higher education. The participants included 262 international students from a southwestern university. The results found only social support from the university was a significant predictor of international students' adjustment. There was no interaction effect between cultural intelligence and social support from any sources on international students' adjustment.

To improve online learning pedagogy within the field of paralegal education, this study investigated how paralegal students and paralegal instructors perceived the effectiveness of synchronous and asynchronous online paralegal courses. Survey results were analyzed using independent samples t-test and correlational analysis, and indicated that overall, paralegal students and paralegal instructors positively perceived synchronous and asynchronous online paralegal courses. Paralegal instructors reported statistically significant higher perceptions than paralegal students: (1) of instructional design and course content in synchronous online paralegal courses; and (2) of technical assistance, communication, and course content in asynchronous online paralegal courses. Instructors also reported higher perceptions of the effectiveness of universal design, online instructional design, and course content in synchronous online paralegal courses than in asynchronous online paralegal courses. Paralegal students reported higher perceptions of asynchronous online paralegal course effectiveness regarding universal design than paralegal instructors. No statistically significant differences existed between paralegal students' perceptions of the effectiveness of synchronous and asynchronous online paralegal courses. A strong, negative relationship existed between paralegal students' age and their perceptions of effective synchronous paralegal courses, which were statistically and practically significant. Statistically significant relationships existed between paralegal instructors' perceptions of effective synchronous online paralegal course and the number of courses …

Employability skill development is being increasingly investigated among higher education scholars, corporate hiring managers, and governments around the world. Understanding employability skill development is important because it has implications on educational policy, teaching techniques, curriculum designs, and recruitment practices. This study was conducted at a public research university in a southwestern state of the United States. It was designed to understand the difference in employability skill development among students who participated in a leadership development program compared to those who did not. Additionally, the study investigated what skills were seeing the most change among student participated in the leadership development program, and if a student's major of study played any role in their overall employability development over the course of a year. Eight employability skills were tested in a pre- and post-test model. Results indicated that students in leadership development programs are more likely to see an increase in employability skill development. From the skills tested among participates, those in the leadership program found the most change over time in the area of problem solving skills. Finally, the results also indicate that a student's major does have an impact on their overall employability skill development. Students who major in business …

The purpose of this study was to determine the overall effectiveness of Turkey's technology integration initiative on teachers' attitudes and examine the moderating effects of related study characteristics. The 22 studies in this meta-analysis, carried out between the years 2010 and 2017, investigated the effects of Turkey's technology integration initiative on teachers' attitudes and met the inclusion criteria. This study followed a traditional meta-analysis research approach utilizing Hedge's g effect size to combine studies. The effect size was calculated using Comprehensive Meta-Analysis (CMA) software. The result (g = .31) indicates that Turkey's technology integration initiative had a moderate but significant influence on teacher attitudes. In addition to teacher attitudes, barriers that could contribute to some K–12 teachers' lack of integration training were identified. Based on the results it is recommended that future professional development and training for teachers include assessments of teacher technology usage by administrators, an increase in time for collaborative planning among teachers, and more just-in-time technology support for technology integration.

Frequent absences resulting from a chronic illness can disrupt adolescent school involvement, impacting academic achievement and psychosocial development as a result. This study explores whether certified child life specialists (CCLSs) could be a resource for parents as they address their adolescents' academic disruptions. Specifically, this study assesses an online training program designed to increase CCLSs' knowledge and self-efficacy as related to adolescents' academic adjustment following frequent absences. This knowledge and skill based training was designed as a three part module with sections including: academic considerations, psychosocial considerations, and availability of school resources in promoting successful adolescent academic adjustment. 62 CCLSs were recruited to participate and complete measures evaluating knowledge, in relation to content included in each module, and self-efficacy, involving communication with parents in regards to adolescent academic adjustment. T-tests were conducted to determine whether there were differences in reports of self-efficacy and knowledge following participation in the intervention between and within the treatment and control groups. Results indicate statistical significance for enhanced knowledge and self-efficacy for the treatment group at post-test. Therefore, the outcomes from this study support the effectiveness of brief online training in fostering knowledge and feelings of efficacy for CCLSs in a context not typically included …

In this dissertation, density functional theory calculations are performed to calculate the thermodynamic and electrochemical properties of metal coordinated frameworks for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Gibb's free energy, overpotential, charge transfer and ligands effect are evaluated. The charge transfer analysis shows the positive charges on the metal coordinated frameworks play an essential role in improving the electrochemical properties of the metal coordinated frameworks. Based on the calculations, design principles are introduced to rationally design and predict the electrochemical properties of metal coordinated frameworks as efficient catalysts for ORR and OER. An intrinsic descriptor is discovered for the first time, which can be used as a materials parameter for rational design of the metal coordinated frameworks for energy storage and conversion. The success of the design principles provides a better understanding of the mechanism behind ORR and OER and a screening approach for the best catalyst for energy storage and conversion.

The challenges of at-risk students are not new. Newspaper articles from the 1860s presented information about communities seeking to help students to complete school and find employment to provide a livable wage. Today's solutions focus on legislation intended to affect societal change and provide equitable opportunities for at-risk students. Much research regarding how to improve academic outcomes for at-risk students addresses high school level, identifying those factors that encourage secondary learners to remain in school. However, less work has been done investigating whether earlier intervention can obviate later retention efforts by improving students' learning outcomes in the elementary grades. In this vein, engagement is a factor found to positively influence learning, particularly when students are actively engaged with instructional content. Technology can facilitate such interactions between students and content; however, research is needed to better understand the relationship between student engagement and technology, particularly with at-risk students in elementary settings. Seeking to address the gap, this qualitative study examined the occasion of a fifth-grade school that recently implemented 1:1 technology. Using a case study approach, researchers explored the effects of the 1:1 Chromebook implementation on teacher-perceived student engagement at the elementary level. This study sought to better understand how this …

The purpose of this three-essay dissertation was to expand knowledge and theory regarding soft systems methodologies (SSMs) and data visualization approaches in business, engineering, and other social sciences. The first essay depicts a bibliometric analysis study of the historic impacts of SSM from 1980-2018 on business, engineering, and other social sciences fields. This study found 285 articles that described or employed SSM for research and included outcomes such as top SSM authors, author citation impacts, common dissemination outlets, time-bound distribution of publications, and other relevant findings. This study provided a picture of who, what, why, when, and where SSM has had the greatest impact on academic thought and practice. The second essay presents research on the academic impact of Systemigrams, an associated data visualization approach, finding examples of conceptual or research development that employed Systemigrams to depict complex problem situations. Recommendations for improvement of designing these data visualizations to increase their field use resulted from this study. The final essay leverages a selection of the articles as use cases to produce a grounded theory study to identify phenomena that arose from the use of SSM for operations and firm strategy research. This study identified two broad themes including (i) scope, …

The wind bands in Japan are considered by many scholars and wind band conductors to be among some of the finest ensembles in today's wind ensemble medium. The literature and repertoire of Japanese ensembles have evolved from orchestral transcriptions, patriotic music, and military marches to original compositions by European, American, and Japanese composers. British conductor Timothy Reynish states that Japanese wind band music has looked traditionally towards the United States and occasionally United Kingdom for inspiration and repertoire. This phenomenon can be attributed to the many collegiate American and the few English wind band conductors who traveled to Japan as guest conductors, and in some cases, became residents of Japan. The focus of this study is to closely examine this significant impact of American collegiate wind band conductors, their influence on Japanese programming and how that programming has affected the collegiate repertoire. This study includes surveys of repertoire, concert programs, discographies of recordings, and interviews with prominent American conductors currently conducting in Japan. This research documents the impact that American wind band conductors have had on the programming of Japanese wind bands and how their influence have altered the collegiate repertoire. Evidence of this impact is documented by Toshio Akiyama, …

This dissertation is about new materialism as it relates to art education. It is a speculative inquiry that seeks to illuminate the interconnectivity of things by considering the ways in which things participate in generative practices of perceiving and making. To do so, the dissertation pioneers an arts-based methodology that allows for broad considerations about who and what can be considered an agent in the process of art making. In this inquiry, the researcher is an artist-participant with other more-than-human and human participants to construct an (im)material autohistoria-teoría, a revisionist interdisciplinary artwork inspired by the work of Anzaldúa. The term w/e is developed and discussed as new language for expanding upon Braidotti's posthumanist subjectivity. New theories called thing(k)ing (including found poetry) and (im)materiality are discussed as movements towards better understanding the contributions of the more-than-human in artmaking practices.

The purpose of this dissertation is to offer a pedagogical guide to Woodsprite and Waterbug Collection (1977) by Dan Beaty (1937-2002) through an analysis of its pedagogical values and teaching applications. This set consists of twelve short, intermediate-level pieces, featuring various contemporary idioms. Each piece is also pedagogically written to help intermediate students to refine specific pianistic techniques beyond the elementary level. In addition, Beaty's collection expands students' musical vision and musicianship for more advanced studies via the incorporation of contemporary music theory and techniques. These qualities make Woodsprite and Waterbug Collection a valuable tool for intermediate piano students. It is also useful for instructors searching for repertoire to introduce contemporary idioms. The author hopes that this study will encourage performers, teachers and scholars to consider this work and Beaty's other piano compositions. By studying Woodsprite and Waterbug Collection, students will be more appreciative of contemporary repertoire and will welcome learning similar pieces in the future.

Unsuk Chin (b.1961), a Korean-born woman composer, was a student of Gyorgy Sandor Ligeti (1923-2006). Chin's work reflects the influence of Ligeti but also undeniably has its own style. This study investigates the six piano etudes so far published from 12 Piano Etudes (1995-2003) by Unsuk Chin and compares them with Ligeti's piano etudes to highlight the influence of the teacher on the student and to aid pianists in facing the unique technical challenges posed by both sets of etudes. The practice guide provided in this study for each specific technical difficulty requires a degree of patience from a student which, if followed, will enhance the performance.

Recent increases in stock repurchases among U.S. corporations coupled with a historically low cost of debt since the Global Financial Crisis has created media speculation that firms in recent years are paying for their expanding share buyback programs with debt. Repurchasing stock by increasing leverage, instead of using internal funds, implies that managers may speculate on current low interest rate environments at the expense of shareholders. Recent studies find that stock repurchases are associated with reductions in future firm employment and investments such as capital expenditures and research and development expenses. This study expands on prior studies by evaluating how debt-financed stock repurchases affect firm investment, investigating the likelihood of these repurchases in low interest rate environments and assessing the effects on firm value. Results confirm that, in recent years, debt-financed repurchases have increased substantially and the probability of debt-financed repurchases increases in the presence of low interest rates. This relationship is especially pronounced in the years following the Global Financial Crisis. Debt-financed repurchases are associated with small reductions in firm investment; however, these reductions are significantly less after adjusting for industry conditions. Finally, there is little evidence that the method of financing repurchases affects firm value nor does it …

The goal of this dissertation is to demonstrate that data from a remotely located building can be utilized for energy modeling of a similar type of building and to demonstrate how to use this remote data without physically moving the data from one server to another using Virtual Information Fabric Infrastructure (VIFI). In order to achieve this goal, firstly an EnergyPlus model was created for Greek Life Center, a campus building located at University of North Texas campus at Denton in Texas, USA. Three thermal comfort models of Fanger model, Pierce two-node model and KSU two-node model were compared in order to find which one of these three models is most accurate to predict occupant thermal comfort. This study shows that Fanger's model is most accurate in predicting thermal comfort. Secondly, an experimental data pertaining to lighting usage and occupancy in a single-occupancy office from Carnegie Mellon University (CMU) has been implemented in order to perform energy analysis of Greek Life Center assuming that occupants in this building's offices behave similarly as occupants in CMU. Thirdly, different data types, data formats and data sources were identified which are required in order to develop a city-scale urban building energy model (CS-UBEM). …