The role of the principal has become increasingly complex and challenging. Recent emphasis has been placed on the role of principals as leaders who can build a culture of learning in schools to close the student achievement gap. Outside factors such as fast-growth in Texas have caused schools to change and grow quickly, which increases the learning demands placed on principals as they seek to develop the knowledge and skills needed for effective leadership. Developing and sustaining a professional learning community is a powerful strategy that has been found to improve teaching and learning, however developing professional learning communities requires skilled leadership. Limited research exists regarding how principals learn to implement and sustain professional learning communities within fast-growth districts, therefore, with this phenomenological qualitative research, I explored the lived experiences of seven principals within one fast-growth district in Texas to explore how they learned to develop and sustain a professional learning community.

In rural, low socioeconomic public schools, the diversity of the student population challenges teachers beyond their means to meet the wide-ranging needs of students, and therefore creating opportunity gaps. The purpose of this study was to explore one district's leadership support of teachers to create an equitable learning environment for all students. The present study built on existing literature by discovering leadership practices and perceived necessary supports for closing achievement gaps in K-12 classrooms. Through interviews with district and school administrators, classroom teachers, and observations of leadership meetings, the research for this case study included data collection and analysis. From the interview questions and observations, six themes emerged. The themes revealed from the data collected and analysis for this qualitative study aligned with the components of the conceptual framework, a sequence of initiative requirements for equitable learning environments. Developing a sequence of initiatives among all levels of educators could benefit sustainment of an equitable learning environment in Rural ISD. Recommended for further research is professional development to both leadership and teachers about professional learning communities (PLCs). In addition, study of parent education programs and how relationships achieve more parental involvement requires further research. A final recommendation for collegiate education preparation …

Play therapy and animal-assisted therapy are two specialized modalities within the field of counseling. Child-centered play therapy (CCPT) is a specific theoretical approach to play therapy that regards the therapeutic relationship as the primary healing factor. With much empirical support, CCPT is considered an effective mental health treatment option for working with children. Animal-assisted therapy in counseling (AAT-C) is acknowledged in the literature as a supplemental treatment modality to an existing counseling practice. Although past researchers have shown support for AAT-C as well as CCPT, there is a current dearth of literature examining the integration of these approaches. The present study sought to understand the approach of incorporating a therapy dog into child-centered play therapy while maintaining theoretical consistency. Using a constructivist grounded theory approach, I facilitated child-centered canine-assisted play therapy (C3APT) services for four children and reviewed the sessions with expert supervisors in AAT-C and CCPT. Three major themes emerged from the data: (a) principles of C3APT, (b) procedures of C3APT, and (c) relational dynamics. Implications for clinical practice and training of both therapy dogs and C3APT practitioners are also discussed.

Research has shown teachers' attitudes toward students with disabilities directly affect the students' performance in the general education classroom; however, more research is needed to determine what variables influence high school teacher and support staff attitudes. The purpose of this study was to determine the attitudes of high school general education teachers, special education teachers, and support staff toward students with disabilities in the general education classroom. The study examined multiple variables such as gender, race/ethnicity, teaching experience, educators' role, and school size; and the impact of professional development on their attitudes toward inclusion. This study used an explanatory sequential mixed-methods design. Data collection included the Inclusion Attitude Scale for High School Teachers (IASHST), developed by Ernst and Roger, and then focus groups for general education teachers, special education teachers, and support staff in order to triangulate the findings. The results of this study found that general education teachers may have a more negative attitude than special education teachers and support staff. However, it is important to note that members of each focus group described what they considered to be appropriate exceptions to including students with disabilities in the general education classroom.

This work investigates the Fresnel-lens-based solar concentrator-receiver system in a multi-perspective manner to design, test and fabricate this concentrator with high-efficiency photon and heat outputs and a minimized effect of chromatic aberrations. First, a MATLAB®-incorporated algorithm optimizes both the flat-spot and the curved lens designs via a statistical ray-tracing methodology of the incident light, considering all of its incidence parameters. The target is to maximize the solar ray intensity on the receiver's aperture, and therefore, achieve the highest possible focal flux. The algorithm outputs prismatic and dimensional geometries of the Fresnel-lens concentrator, which are simulated by COMSOL® Multiphysics to validate the design. For the second part, a novel genetically-themed hierarchical algorithm (GTHA) has been investigated to design Fresnel-lens solar concentrators that match with the distinct energy input and spatial geometry of various thermal applications. Basic heat transfer analysis of each application decides its solar energy requirement. The GTHA incorporated in MATLAB® optimizes the concentrator characteristics to secure this energy demand, balancing a minimized geometry and a maximized efficiency. Two experimental applications were selected from literature to validate the optimization process, a solar welding system for H13 steel plates and a solar Stirling engine with an aluminum-cavity receiver attached to the …

As social interactions increasingly become exclusively online, there is a need for research on the role of identity and social identity in online platforms. Drawing on Symbolic Interactionist approaches to identity, namely Social Identity Theory and Identity Theory, as well as Signaling Theory, this study argues that actors will selectively use religious language to signal their credentials to an audience for the purpose of garnering prosocial behavior in the form of donations to their fundraising campaign. Using latent semantic analysis topic models to analyze the self-presentations of crowdsourcing campaigners on GoFundMe.com, this study found evidence for the presence of signaling to a religious identity online as well as a significant difference in the presentation of need for campaigns originating in areas with high reported religiosity compared to campaigns from areas of low religiosity. In comparison to other campaigns, campaigners engaging in religious signaling were significantly increasing their donations. I suggest that strategically chosen religious topics in online crowdfunding is an example of low-cost identity signaling and provides insight into how signaling happens online and the potential outcomes resulting from this cultural work.

Photophysical properties of an array of various polyaromatic hydrocarbons were benchmarked with B3LYP, M06 and B97D methods coupled with Pople and CEP-31G(d) basis sets. Results from the benchmark show the importance of diffuse basis sets when modeling the electronic properties of highly conjugated systems and provide qualitative reliable accuracy with certain levels of theory. B97D and M06 are applied to modeling pyrene adducts governed by non-covalent interactions in both gaseous and condensed states to reproduce experimental spectra. DFT calculations with both B97D and M06 functionals show qualitatively and quantitatively that pyrene dimer is a stronger π–base as compared to its monomer. Binding energies coupled with MEP, PCA and Qzz results show that the difference in π-basicity of the monomer and dimer impacts the supramolecular chemistry involved in adducts formed with super π-acidic silver cyclometallic trimer (CTC). Non-covalent interactions between coinage metal CTCs and ammonia/phosphine substrates is reported. Interactions between these substrates and the facial plane of the π-rich gold CTC reveal a novel interaction, where the typical Lewis acid/base roles are reversed for the substrates. Adducts formed through this type of interaction define typical Lewis bases like ammonia and phosphine as Lewis acids, wherein the partially positive hydrogens coordinate to …

Agtarap, Wright, Mlynski, Hammad, and Blackledge took an initial step in providing support for the predictive validity of a new conceptual analysis concerned with behavioral restraint - defined as active resistance against a behavioral impulse or urge. The current study was designed to partially replicate and extend findings from their study, employing a common film clip protocol and a procedure for inducing low- and high levels of fatigue. Analyses indicated that key cardiovascular (CV) responses rose with the evocativeness of the film clip among low fatigue participants but fell with the evocativeness of the film clip among high fatigue participants. This is consistent with the prediction that high fatigue participants would put forth more restrain intensity than low fatigue participants when confronted with the less evocative clip, but less restraint intensity than low fatigue participants when confronted with the more evocative clip. Behavioral restraint performance - quantified as duration of facial non-neutrality - was also consistent with predictions, being impaired by fatigue under high- but not low evocativeness conditions. Findings support the broad theoretical suggestion that fatigue influence on behavioral restraint is multifaceted, dependent on the perceived magnitude of the impulse or urge experienced and the importance of resisting it.

Emma Lou Diemer (b. 1927) is a leading American composer, pianist, and educator. Although she composed many outstanding advanced-level piano works, she also believes that composing for other levels is a good discipline for composers. Her two collections Reaching Out and Travels Through Sound contain various contemporary techniques that are highly approachable for intermediate-level students. The purpose of this study is to provide a pedagogical guide to contemporary elements present in these collections, which are ideal for developing skills that can prepare intermediate-level students for more complex modern music. Diemer incorporates such contemporary features as complex rhythms and meters, non-traditional notations, and extended piano techniques, as well as non-traditional textures and forms. These techniques are presented in a compact and informative but not too complicated manner, so that intermediate-level students can master them.

American composer David Kechley was profoundly impacted by a 1990 trip to the Ryoan-ji Temple in Kyoto, Japan. The composer describes the finely raked, small white stones in the midst of fifteen large rocks in the Japanese Zen garden as "planned randomness." Kechley's inaugural composition for saxophone-guitar duo, In the Dragon's Garden, reflects his experience at the Ryoan-ji Temple. The use of minimalistic compositional techniques without literal repetition in the work represents a departure from the first generation of Minimalist composers, such as LaMonte Young, Steve Reich, Phillip Glass, and John Adams. An analysis of minimalistic compositional elements, combined with an interview with the commissioning ensemble, the Ryoanji Duo, provides insights into the interpretation and preparation of this complex work. Furthermore, this document contains helpful information pertinent to the saxophone-guitar duo. Details on balance and amplification, orchestration, and collaboration with the composer will supply performers and composers with essential knowledge needed to participate in this growing musical medium.

The momentum puzzle, i.e., stocks that have performed better in the past tend to perform better in the future, has been a constant challenge to classic finance theory. Prior research has failed to provide valid risk-based explanations because winner portfolios do not exhibit higher risk characteristics. Without a convincing risk explanation, the persistence of momentum profit is a violation of the efficient market hypothesis. Today, the momentum puzzle remains one of the very few major anomalies that cannot be explained by Fama-French factor models. I find prior empirical efforts to measure momentum profits and its sources are contaminated by the state of the market during both formation and holding periods. By looking into different market states, classified by both traditional and non-traditional bull and bear market definition, I find the key to at least partially solve the momentum mystery. Momentum stocks are riskier when formed in bull market, and momentum profit is much higher in continuation of market than reverses of market condition, lending empirical support to a risk-based explanation. My definition of market states is essentially based on the risk premium of major risk factors. When market risk is considered a risk factor, if realized market risk premium is …

The relatively new utilization of learning management system (LMS) facilitated blended learning in secondary public schools has grown in popularity, but there is a void in research at this level. Teachers learned how to use the LMS features and honed their blended learning design skills through their own experiences, and in observation of their students' experiences. In this study, the knowledge teachers built and the decisions they made while designing blended learning were explored. In this mixed-methods study, the quantitative and qualitative results aligned, indicating that teachers design courses using a variety of components, often in different ways. Six themes emerged. The relationships between themes were used to create a theoretical visual of the factors impacting secondary teachers' decisions in the design of LMS-facilitated blended learning. Teacher design decisions were focused on the impact their choices would have on students. Variation in course design was purposely used by teachers to differentiate for students individually; however, variation was also the result of design challenges blocking teachers from a specific design choice. The implications for practice primarily focus on removing the design challenges. The results of this study add to other foundational studies to begin to fill the research gap in the …

To conduct this qualitative dissertation study, a phenomenological approach was utilized. The purpose of the study was to examine the perspectives of highly motivated, economically disadvantaged, middle school students to discover the factors that they identified as integral to their overall development and their intrinsic motivation, over time, to learn. A key component of this study was to give voice to the students who participated in this study and utilize their perspectives as a primary data source. Participants in this study included six middle school students, identified as economically disadvantaged, two from fifth grade and four from the seventh grade. Self-determination theory was used as a theoretical framework to guide and inform the analysis of students' perspectives, obtained through individual, semi-structured interviews with each student and classroom observations. Six themes, related to students' intrinsic motivation to learn and succeed in school, were identified. Extrinsic factors were also prominent. Although students expressed a true love of learning, they also acknowledged that external factors such as grades and testing influenced their motivation to learn. Autonomy, competence, and relatedness were major factors at play in the school, classrooms, and homes of these students. Recommendation for practice suggest that teachers, administrators, and parents shift …

William Gillock, a 20th-century American composer and pedagogue, composed numerous works in the styles of different periods for early intermediate-level piano students. The purpose of this dissertation is to introduce Gillock's pieces to teachers of early intermediate students and illustrate how they can be used as a bridge to the study of similar music from Baroque, Classical, and Romantic periods. Gillock's Little Suite in Baroque Style is compared with Handel's Suite in E Major, HWV 430; his Accent on Analytical Sonatinas (Classical) is compared with Clementi's Piano Sonatinas, Op. 36, No. 3, 5, 6; and his Lyric Preludes in Romantic Style (Romantic) is compared with Chopin's 24 Preludes, Op. 28, No. 3, 6, 9, 16, 18, and 24. Each work is examined to reveal its compositional and technical elements along with pedagogical concepts.

Access to adequate liquidity to finance future investments is an essential element of financial management. The two main questions that this dissertation attempts to answer are (i) what is the net valuation effect of LoC? and (ii) if LoC create value, what are the sources of this value? To answer these questions, I constructed a sample of 85,232 firm-years spanning from 1993 to 2016, with credit line data obtained from Capital IQ and Bloomberg. I investigated the valuation effects of LoC with a methodology extensively used in the analysis of the valuation implications of cash. I used this methodology because cash and LoC are two alternatives to manage liquidity and estimated the changes in shareholders' value associated with changes in existing LoC undrawn balances and on new LoC agreements. The results from this analysis demonstrates a positive association between increases in LoC capacity and shareholder's value. These findings are also obtained in univariate and event study analyses. The results also suggest that LoC create more value for firms that are rich in cash, indicating the LoC and cash are complementary liquidity management tools. I then focused on the sources of the value created by credit lines. I examined whether information …

Latinx students are underrepresented among high school music students in the United States, nationally. However, localized demographics in some parts of the country reveal secondary music programs that are comprised nearly entirely of Latinx students. Still, the experiences of such a large and racially marginalized population as Latinx students remain under-researched in the field of music education. To explore how Latinx racial identity may inform the experiences of Latinx music students and their music teachers, I conducted a post-qualitative study of students and teachers in music classes at large secondary schools in which the Latinx population is 95 percent or more. Data were collected through in-depth, semi-structured interviews with music students and their teachers. To guide my thinking on the role of race in the lives of the participants, I incorporated Omi and Winant's (2015) theory of racial formation throughout the data analysis. Overall findings indicated that race informs much of the experiences of the participants in varying, sometimes subtle ways. Through racism, racial resistance, the formation of racial identity, and the incorporation of both colorblind ideology and race consciousness, the participants provided nuance as to how we may regard the role and significance of race in music education. Implications …

The purpose of this study is to provide a content analysis of specific studies that involve sustainable information and communication technology (ICT) use in K-12 education in the U.S. The results from the content analysis were used to identify factors that may contribute to the sustainable implementation of technologies in K-12 instruction. Factors from specific studies from 2000 to 2018 that have implemented ICT in instruction for three years or more were analyzed. The findings from the analysis may be helpful in developing a conceptual framework listing possible sustainability factors for K-12 school districts using technology in instruction. The results may also be beneficial to educational policy makers, school administrators, and educational stakeholders.

Existing literature provides newly identified responsibilities of the principal supervisor but lacks in information about how districts should strategically spearhead the process of initiating, implementing, and managing the changes to the role of the supervisor. In this study, I examined the behaviors and actions of one school district's executive-level leaders as they shifted the position of the principal supervisor. Findings could contribute to a new area of research in how district leaders may navigate and manage the complicated process of initiating and managing the changes to the principal supervisor's role.

In 1873, a financial crisis plunged the United States into a deep economic depression that exacerbated a number of post-war economic issues. By the late 1870s, political dissent centered primarily on financial issues merged into the Greenback movement, which represented a loose coalition of reformers calling for economic relief based on the expanded use of greenbacks (paper currency issued by the United States Treasury during the Civil War). The Greenback Party emerged as a direct response to federal financial policies, but in Texas, it also provided a broad political platform for those opposed to the policies of "Redeemer/Bourbon" Democrats. The Greenback Party of Texas brought together a wide range of dissenters, including disgruntled Democrats, ousted Republicans, and many different economic and social reformers. From 1876, when the first Greenback clubs appeared in Texas, to the Greenback Party's virtual disappearance after the election of 1884, the Texas Greenbackers reached across boundaries of section, race, class, and sometimes gender; brought together farmers, workers, and professionals; Southerners and Northerners, white and black; former Confederates and former Unionists; native-born Americans and immigrants; and received sizable support from multiple counties in the northern, eastern, and central part of the state. In spite of its short …

Semiconducting aromatic-boron carbide composite/alloyed films formed by plasma enhanced chemical vapor deposition from carborane and aromatic precursors have been demonstrated to be excellent detectors for thermal neutrons because of the large 10B cross section. The electronic properties of these films derived from XPS show that the properties of boron carbide can be tuned by co-deposition of aromatic compounds and carborane. Aromatic doping results in narrower indirect band gaps (1.1 - 1.7 eV vs ~3 eV for orthocarborane-derived boron carbide without aromatics) and average charge transport lifetimes (as long as 2.5 ms for benzene-orthocarborane and 1.5 - 2.5 ms for indole-orthocarborane) that are superior to those of boron carbide (35 µs). The films also show enhanced electron-hole separation that is also superior to those of boron carbide where the states at the top of the valence band is made of aromatic components while states at the bottom of the conduction band is a combination of aromatic and carborane moeities. These properties result in greatly enhanced (~850%) charge collection, relative to films without aromatic content, in thermal neutron exposures at zero-bias, and are gamma-blind. Such films are therefore excellent candidates for zero-bias neutron detector applications. These properties also show little variation with …

Porphyrins with extended π-electronic networks are promising candidates for a wide range of applications from medicine to nanotechnology owing to their unique optical and electronic properties. This dissertation is focused on synthesis, characterization and application of β-functionalized π-extended porphyrins. This dissertation is comprised of seven chapters. Chapter 1 focuses on the importance and objective of this work. Chapter 2 gives brief introduction to porphyrins and π-extended porphyrins. In chapter 3, a class of β-functionalized linear push-pull zinc dibenzoporphyrins YH1-YH3 were designed, synthesized, and utilized as light harvesters for DSSCs. In chapter 4, in order to further enhance the photovoltaic performance of β-functionalized benzoporphyrin dyes based DSSCs, a new class of push-pull dibenzoporphyrins YH4-YH7 bearing the phenylethynyl bridge was designed, synthesized and utilized as light harvesters for DSSCs. In chapter 5, in order to solve the photodegradation problem associated with YH7, a new series of push-pull dibenzoporphyrins YH8-YH10 bearing different diarylamino push groups was designed and synthesized. This class of push-pull porphyrins shows improved photostability and enhanced DSSC performance. In chapter 6, a new pentacene-fused diporphyrin with high stability and solubility was prepared and characterized. Chapter 7 includes the summary of this dissertation and describes possible future work.

High levels of quality father involvement in childhood are associated with children's socio-emotional, cognitive, and behavioral wellbeing. However, fathers can experience difficulty in building positive relationships with their kids due to work-life balance, lack of relational experience, and other life stressors. The purpose of this study was to assess the effectiveness of child-parent relationship therapy (CPRT) on fathers' parental empathy, parental stress, and child behavior problems. Though an abundance of literature exists to support the efficacy of CPRT, this was the first study to include a randomized controlled design with an all-male sample. This was also the first CPRT study to include both English and Spanish speaking fathers with intervention offered in both languages. Participants were 30 fathers (22 English, 8 Spanish; 53% Latino, 40% Caucasian, 7% Asian) with children between the ages of 3 and 10 (60% male, 40% female; 57% Latino/a, 37% Caucasian, 6% Asian). Fathers were randomly assigned to the experimental group (CPRT) (n = 14) or waitlist control group (n = 16). Results from 2 (Group) by 2 (Time) repeated measures ANOVAs did not yield statistically significant interaction effects on the dependent variables. However, results indicated a statistically significant main effect for time on each dependent …

In recent decades, changes to federal and state accountability policy and related teacher evaluation systems occurred in the United States with minimal input from two of the largest groups of stakeholders impacted: principals and teachers. For this case study, I explored principals' and teachers' perceptions of their experiences with the Texas Teacher Evaluation and Support System (T-TESS), specifically the role of leadership practices and use of the evaluation rubric as a policy tool within an evaluation process. The study took place at one elementary school. Teachers perceived the evaluation process as carrying out its intended purpose of improving instruction through professional growth. Principals and teachers viewed the teacher evaluation system and the teacher evaluation rubric, a policy tool designed to facilitate and inform the processes and practices used to improve instruction in their districts and schools, as effective. Important district-level decisions also impacted how principals and teachers perceived the T-TESS. District-level decisions included policy related to frequency of required observations, methods of including student performance data, decisions related whether to issue a single rating or multiple ratings, and evaluation of specialized teachers. School-based leadership behaviors and practices were also found to influence teachers' perceptions related to the effectiveness of teacher …

Genomic modifications occur slowly across generations, whereas short-term epigenetic transgenerational inheritance of adaptive phenotypes may be immediately beneficial to large numbers of individuals, acting as a bridge for survival when adverse environments occur. In this study we used dietary exposure to crude oil as an example of an environmental stressor to assess its effects from the molecular to the organismal levels in piscine and avian animal models. In addition, we assessed the role of the parental exposures on their offspring F1 generation. The research developed in this dissertation has contributed to several areas of investigation including molecular biology, animal physiology, and evolutionary biology. The quantitative information from these studies may be utilized to supplement information regarding the proximate and ultimate effects of environmental stressors on fish and bird populations. Furthermore, this information may be used as additional support for understanding the conservation of the responses from the molecular to the whole organismal levels across the vertebrate taxa, as well as their implications for population survival and maintenance. Additionally, the zebrafish (Danio rerio), the Siamese fighting fish (Betta splendens) and the king quail (Coturnix chinensis) have proven to be excellent models to start building a strong basis for understanding the effects …