The findings of this study serve as an exploratory case-study examining the conditions of professional learning for in-service principals in one north Texas suburban district with changing student demographics. Quantitative and qualitative analysis of a variety of data collected sought to reveal how professional development of principals increased a principal's contingent leadership skills to positively affect student achievement through school improvement efforts. Perceptions were examined from the sample of seven executive directors at the district level; six campus principals (two elementary, two middle, and two high school); and eight teachers selected from among four of the six campuses whose principal participated in a semi-structured interview. Additionally, responses from a principal survey were examined. Findings were organized around three themes that surfaced from the deductive and inductive analysis of data collected in response to the three research questions. The themes were: instructional leadership and other principal responsibilities, principal professional development and components of professional learning, and measuring the effectiveness of principal professional learning. Findings revealed that there are many offerings of professional development opportunities available to principals in Learning ISD. The components essential in effective principal professional learning opportunities in the studied district consisted of embedding social capital, professional capital, and …

This qualitative study examines an asynchronous online course from a private university utilizing a template model for all online courses to provide students with consistent navigation and course structure throughout their degree program. The asynchronous online courses are purposely created using three criteria of quality course design: navigation is intuitive, information is chunked, and instructions are written clearly. A two-part usability test was conducted with three internal and three external participants. The two-part usability test focused on course navigation and examined the signaling, segmenting, and coherence principles applied to course content page layouts. Transcripts from the usability tests and observational field notes were coded through an iterative process in Nvivo. Through emic and etic coding, seven main categories were identified: user experience, cognitive load, multimedia learning principles, page design and layout attributes, course navigational attributes, course attributes and information, and participant navigational behavior. The findings for first-day navigation, general navigational behaviors, and perceptions of design elements used to implement the signaling, segmenting, and coherence principle are discussed. Course design recommendations for creating a positive usability experience and suggestions for future research are provided.

This study encompasses my attempt to understand the lived experience of students in a higher education art appreciation course when a traditional textbook was replaced by a computer game. The methodology uses a mixture of phenomenological interviews and games as well as game machines to interpret these lived experiences. The process of allowing the research to dictate the direction I would take in my research is central to my research process. The initial research idea evolved into three research games and three versions of those games by using the data from student interviews as a generative data. The implications from this study focus upon creating new pedagogical interventions in the form of a studious labyrinthian pedagogy rather than a finite maze-like approach to art education. This dissertation examines how art education can benefit from more freedom and exploration for students to navigate their own learning.

Florence Price (1887–1953) was one of the most important African American woman composers of the early twentieth century. Price's music is known for combining techniques of Western art music with elements of the African American musical heritage. Although Price composed many works for piano, from large virtuoso pieces to characteristic miniatures, this study will address only her Piano Sonata in E minor. The purpose of this study is to analyze this sonata and discuss her compositional techniques and musical style as a combination of African American elements and Classical European procedures, combined and coordinated yet remaining in tension. Traditional European harmony, tonality, and form are successfully combined with African American characteristics: pentatonic scale, spirituals, syncopations, repetition, and dance rhythms. Indeed, Price's work is a considerable achievement, and she is one of the important African American women composers who should be better recognized today.

Reptiles can often experience perturbations that greatly influence their metabolic status (e.g., temperature, exercise, digestion, and ontogeny). The most common cause of fluctuations in metabolic status in post-embryonic reptiles is arguably digestion and physical activity (which will be further referred to as exercise). The objective of this thesis is to determine the mechanisms involved in CO2 transport during digestion, determine the mechanisms that allow for the maintenance of acid-base homeostasis during digestion, and observing the effect of an understudied form of exercise in semi-aquatic reptiles on the regulation of metabolic acidosis and base deficit. This dissertation provided evidence for potentially novel and under investigated mechanisms for acid-base homeostasis (e.g., small intestine and tissue buffering capacity; Chapters 3 & 4), while also debunking a proposed hypothesis for the function of an anatomical feature that still remains a mystery to comparative physiologist (Chapter 2). This thesis is far from systematic and exhaustive in its approach, however, the work accomplished in this dissertation has become the foundation for multiple distinct paths for ecologically relevant investigations of the regulation of metabolic acidosis/alkalosis in reptiles.

Current practices in music education parallel the expansion of globalization and cross-cultural contact. However, the multicultural music education movement—referred to by some as "world music education"—has been primarily about the diversity of musical experiences and less about the circumstances and processes of the music itself. As a result, Western music educators often neglect inseparable learning pathways and unintentionally distort the meaning and value of diverse musics from around the world. While there is considerable research examining the teaching and learning of diverse music cultures, significant portions of that literature only represent the observed accounts of cultural outsiders. In this study, I examined the lived experiences of world music culture bearers who teach in Western university institutions in the Southwest region of the United States. I used narrative inquiry to learn more about their pedagogical experiences and documented their storied accounts of interactions with university students. I based the theoretical framework in this study on Clandinin and Connelly's narrative inquiry three-dimensional space model and Schippers' twelve continuum transmission framework. My primary findings revealed that teaching in a cross-cultural setting involves several musical and contextual choices. Moreover, the perceived authenticity of the research participants' transmission processes was often a byproduct of their …

Rapsodies pour voix, clarinette, alto, et piano is a set of three songs by Charles Martin Loeffler (1861-1935) with text by Maurice Rollinat (1846-1903). The songs were composed in the summer of 1898 but never published during Loeffler's lifetime. This study compares Loeffler's holograph and copyist scores, showing differences in pitch, rhythm, and various articulation markings. Loeffler and Rollinat's biographies are included, along with scans of the holograph and copyist scores.

This thesis is a critical analysis and creative commentary providing research and insight into my 150-minute multimedia exhibition, "Femininity: Ownership and Power," that premiered October 23, 2021. All of my research, composition, and collaboration efforts seek to recontextualize the semiotics of ‘femininity' through ownership and empowerment from varying intersections and identities. The titles of the eight works composed and premiered as part of the exhibition include: a beautiful reckoning; Dust; Moirai; Gaia; Portrait of the American Woman; Shared, In Balanced Contrast; At My Intersection; and I See You. Also included was #pinkcode, an exhibit that features a fuschia graphic user interface for an interactive modulation synthesis application built in Csound designed to bring femininity into computer music spaces. The musical compositions vary in instrumentation including flute, alto flute, voice, guitar, viola, harp, cajon, vibraphone, live electronics, and fixed media. They also vary in medium including live performance, virtual reality video, music video, audio-reactive TouchDesigner video, immersive text projections, light show, and live dance. Feminist texts by women poets and authors recited by women personally connected to me are also included in the fabric of the musical fixed media of multiple pieces in the thesis exhibition. Collaborators of artistic media including …

Event-based mediated participatory archives, in which communities of ordinary people contribute their records to archives during collection day events represent a paradigm shift within the archival field. Applying a qualitative approach, this study investigates event-based mediated participatory archives using Bastian's communities of records and memory as a guiding framework. Using the Mass. Memories Road Show as a case study, data collection and analysis took place over three phases. In Phase I, archive supporting documents were collected and analyzed using "against the grain" historical analysis methods. In Phase II, data from the Mass. Memories Road Show digital collections were collected and analyzed using grounded theory analysis methods. In Phase III, ethnographic research data, including a direct observation and semi-structured interviews, was collected and analyzed using ethnographic analysis methods. The results of this study suggest that community participants' motivations to contribute to participatory archives are rooted in self-fulfillment while institutional archives personnel members' intentions are based in inclusive community-building. Furthermore, the contribution of records to the archives allows community participants to share personal stories that serve as evidence of their historical legacies and as affirmation of their roles in their communities. Throughout the findings, moments of connection which enable the sharing of …

Mechanical pressure offers unique control over the energy landscape of chemical reactions, opening up pathways that are inaccessible through conventional thermochemistry. We hypothesize that the reduced dimensionality defines the conformational space of the high-pressure reaction, giving rise to new selectivity that is unavailable in 3D systems. Here, we demonstrate this concept through the pressure-controlled topochemical polymerization of the diacetylene molecule deca‐3,5‐diyn‐1‐amine (DDA) incorporated in the two-dimensional (2D) perovskite [DDA]2PbBr4. Compression at 3 GPa drives the first topochemical polymerization through 1,2 addition, forming a polyene product at room temperature. The reaction is initiated by the mechanical bending of the linear DDA molecule, a mechanism fundamentally different from the 1,4-addition in 3D solids. Importantly, pressure hinders the second 1,2-addition by disfavoring the gauche conformation between the remaining acetylene groups, allowing for the selective formation of polyene versus polyacene products. We characterize the reaction mechanisms and products using spectroscopies (Raman, X-ray photoelectron, ultraviolet-visible), X-ray diffraction and density-functional theory simulations. These results highlight the important role of dimensionality in high-pressure chemistry, and offers a new paradigm for creating low-dimensional functional materials.

A systematic development of 2D alloy catalyst with synergistic performance of high lithium polysulfide (LiPS) binding energy and efficient Li+ ion/electron conduction is presented. The first section of work found that Li+ ions can flow through the percolated ion transport pathway in polycrystalline MoS2, while Na+ and K+ ions can easily flow through the percolated 1D ion channel near the grain boundaries. An unusually high ionic conductivity of extrinsic Li+, Na+, and K+ ions in 2D MoS2 film exceeding 1 S/cm was measured that is more than two orders of magnitude higher than those of conventional solid ionic materials, including 2D ionic materials. The second section of this dissertation focus on catalyzing the transformation of LiPSs to prevent the shuttle effect during the battery cycling by synthesizing 2H (semiconducting) – 1T (metallic) mixed phase 2D Mo0.5W0.5S2 alloy on CNF paper, using two step sputtering and sulfurization method. The lithium sulfur (Li-S) battery cell assembled with the 2D Mo0.5W0.5S2/CNF/S cathode shows a high specific capacity of 1228 mAh g-1 at 0.1C and much higher cyclic stability over 4 times as compared to the pristine cathodes. The high LiPSs binding energy of catalyst efficiently prevents the shuttling effect and corrosion of Li …

The present study systematically reviewed and statistically summarized the current body of literature on the relationship between maternal health literacy and maternal sensitivity, and the effect of these two variables on mothers' care and decision making on distal attachment outcomes. In so doing, a systematic review of the extant peer-reviewed, published literature examining the effectiveness of interventions in effort to improve health literacy and maternal sensitivity, with a focus on increasing the quality of mother-preterm infant attachment outcomes, was undergone. This was followed by four multilevel random effects meta-analyses. Results indicated that mothers who participated in health literacy (maternal sensitivity) interventions had, on average, higher attachment quality, in comparison to those who did not participate. Additionally, maternal age was found to be a statistically significant predictor of the overall average effect size. This suggests that maternal health literacy may be a yet unexplored correlate of mother-preterm infant attachment outcomes.

Preadolescence is a time of emotional, physical, social, and relational changes, which can lead to mental health concerns. Parents of preadolescents also experience changes within their roles as parents, and both parents and preadolescents experienced a wide range of changes and challenges during the COVID-19 pandemic. A mental health intervention focused on enhancing the parent-child relationship among parents of preadolescents is important for overall family functioning. This phenomenological study explored the experiences of parents of preadolescents after participating in a virtual child-parent relationship therapy (CPRT) intervention. Participants were seven parents ages 35 to 56 years-old with preadolescent children between the ages of 9 to 12 years-old. Semi-structured interviews were conducted following the CPRT intervention and analyzed. Six themes were found, including impact of group on learning, child's engagement with parent, child qualities, parent's understanding of self, importance of parent-child relationship, and integration of CPRT skills. The emerging themes indicated that the seven participants experienced changes in themselves, in their child, and in their parent-child relationships. Participants discussed their experiences with the virtual format and their integration of CPRT skills. The participants also reported feeling closeness and support from other group members, even with the virtual format. Findings from this study …

This thesis targets at providing an algebraic method to indicate network behaviors. Furthermore, for a signed-average consensus problem of the system behaviors, event-triggering signed-average algorithms are designed to reduce the communication overheads. In Chapter 1, the background is introduced, and the problem is formulated. In Chapter 2, notations and basics of graph theory are presented. It is known that the terminal value of the system state is determined by the initial state, left eigenvector and right eigenvector associated with zero eigenvalue of the Laplacian matrix. Since there is no mathematical expression of right eigenvector, in Chapter 3, mathematical expression of right eigenvector is given. In Chapter 4, algebraic trait for structurally balanced property of a node is proposed. In Chapter 5, a method for characterization of collective behaviors under directed signed networks is developed. In Chapter 6, dynamic event-triggering signed-average algorithms are proposed and proved for the purpose of relieving the communication burden between agents. Chapter 7 summarizes the thesis and gives future directions.

Motivated by previous relevant research on phononics including both active and passive phononics, the interest of faster turnability and more functions of the active phononics of further study led to this proposing research topic: magnetic field tunable active functional phononics. The first design of magnetic field tunable reciprocal--non-reciprocal transmission acoustic device was established, material was characterized, and numerical simulation has been performed. The simulation results show clear T-symmetric breaking non-reciprocity due to energy level splitting effect with Doppler effect – an acoustic Zeeman effect. Inspired by this preliminary work, further experiments were planned to demonstrate this effective Zeeman effect in phononics and effectively charged phonons in water based ferro-fluid. The objectives of this work as the next series of tasks were to illustrate acoustic Zeeman effect and acoustic Landau levels in various strength of magnetic field to investigate a design non-reciprocal sound device with magnetic field switching, which could be controlled on the amount of non-reciprocity with the strength of magnetic field. Once this new field first discovered by the proposed study tasks, more active tunable magnetic field phononics devices could be designed and exemplified in terms of both simulations and experiments. Faster and more controllable active phononic devices could …

Probiotics/prebiotic supplementation represents a viable option for addressing systemic inflammation and chronic disease risk resulting from excessive body weight. The purpose of this feasibility study was to determine if 90-d of supplementation with prebiotic and probiotic could alter mRNA responsible for inflammation and subsequently metabolic health in weight stable overweight adults. Participants were advised to not change their diet or exercise habits during the study. All protocols were approved by the University IRB and participants gave written informed consent. Participants were randomly assigned to either placebo (N=7; rice flour) or combined (N=8) prebiotic (PreticX® Xylooligosaccharide; 0.8 g/d; ADIP) and probiotic (MegaDuo® Bacillus subtilis HU58 and Bacillus coagulans SC-208; 3 Billion CFU/d) and measurements were made at baseline, 30, 60, and 90-d. Whole body DXA scans (GE iDXA®) and blood 574-plex mRNA analysis (Nanostring®) were used to generate primary outcomes. Compared to placebo, supplementation was associated with a 36% reduction in visceral adipose tissue (p = 0.001). Supplement resulted in significant, differential expression of 15 mRNA associated with adipose tissue inflammation, systemic inflammation, and/or chronic disease risk. The key findings support that 90-d prebiotic/probiotic supplementation may be associated with an improved metabolic health, reduced adipose tissue inflammation, reduced systemic inflammation, and …

Legal rights for public employees are not clear in the area of social media speech. Following the Garcetti v Ceballos (2006) U.S. Supreme Court case, the pursuant to duty test was established. The social media speech of public employees, including educators, could be considered pursuant to their duties as an employee. This means that public employees are vulnerable to disciplinary action from their employer for social media speech. Furthermore, public employees are vulnerable even when they believe their social media speech is done as a private citizen. For this research study, 28 cases at the federal and state levels were analyzed. Seven of the examined cases were U.S. Supreme Court cases involving public employee speech rights. The other 21 cases were extracted from cases determined at the federal and state levels. The cases taking place after the Garcetti v Ceballos (2006) pursuant to duty test were analyzed to see how the test was applied to employee speech. Cases were also analyzed to see what other precedents from the courts had been applied. Additionally, private sector social media rights research was analyzed and reviewed to create more clarity for employees. The findings of the research show the courts have tested employee …

In order to better understand the changes occurring in the internal environment of the pyrolysis process a method of monitoring the internal environment in real time is the key objective of this study. To accomplish this objective four tasks were laid out in order to develop an effective way of monitoring the changes in gases present as pyrolysis is occurring as well as in material activation processing. For all processing the self-activation process was used which combines pyrolysis and thermal activation into a single step process. In the first task 10 hard wood species were activated and the resulting properties were compared to see the impact of wood species on the resulting carbon structures. In order to understand the impact of gas concentration on the resulting carbons the second task developed a gas sensor array which effectiveness was corroborated using GC-MS and then comparisons of the changes in the resulting were made. For the third task the gas sensor array was used to analyze the production of CO2 gas and a triple Gaussian model was developed to model the changes in gas production throughout processing. H2 gas production was modeled in the fourth task using the same Gaussian model as …

Laser-based additive manufacturing offers a high degree of thermokinetic flexibility that has implications on the structure and properties of the fabricated component. However, to exploit the flexibility of this process, it is imperative to understand the process-inherent thermokinetic evolution and its effect on the material characteristics. In view of this, the present work establishes a fundamental understanding of the spatiotemporal variation of thermokinetics during the fabrication of the non-ferrous alloys using the laser powder bed fusion process. Due to existing limitations of experimental techniques to probe such thermokinetics, a finite element method-based computational model is developed to predict the thermokinetic variations during the process. With the computational approach coupled with experimental techniques, the current work presents the solidification behavior influenced by spatially varying thermokinetics. In addition, it uniquely predicts the process-inherent multi-track multi-layer evolution of thermal cycles as well as thermal stress cycles and identifies their influence on the post-solidification microstructural evolution involving solid-state phase transformation. Lastly, the response of the material with a unique microstructure is recorded under various conditions (static and dynamic), which is again compared with the same set properties obtained for the same material processed via conventional routes.

The purpose of this study was to examine the prevalence of character strengths that high school students reported to develop while participating in choir. I created the Character Strengths in Choir Scale (CSCS) to explore the degree to which students believed they exercised 18 character strengths. Local choir students in the pilot study (n = 44) and the main study (n = 114) completed the CSCS and revealed that gratitude, teamwork, and honesty were among the most prevalent strengths while bravery, creativity, and spirituality were among the least prevalent strengths. Student responses were also investigated by subgroups according to gender and years of experience. Results indicated that there were statistically significant differences for the ranking of various character strengths in each subgroup. Aggregately, high school choir students viewed themselves as above average on all assessed strengths.

This study was a replication and an extension of the 2021 research performed by Spurgin and Borquez on the correspondence between receptive and expressive behavior. Spurgin examined the role of the echoic in a hear-say procedure with adult learners, while Borquez examined the role of the echoic in both hear-say and see-say procedures. Both studies found that receptive and expressive correspondence did not occur consistently across participants. The present study asked if the fading steps used during training contributed to the results of the previous researchers. In the present study, the fading steps were changed to minimize the chance that the participant developed a position bias. The conditions were also counterbalanced to analyze the effects of hear-say vs. see-say, easy vs. difficult words, and the order in which the words were trained on the acquisition of receptive labels and the emergence of expressive labels. The study consisted of five phases: pre-training, hear-say teaching, see-say teaching, receptive testing, and expressive testing. Results indicated that although that acquisition of receptive labels improved, the change in fading steps did not make a significant difference in the correspondence of receptive and expressive language. Results showed similar correspondence in the hear-say and see-say procedures. Easy …

This dissertation examines the role of third parties in civil war mediation and peacekeeping efforts. The dissertation makes two primary contributions to the literature. First, it builds upon existing literature by applying state-level arguments of third party involvement in mediation and peacekeeping efforts to the United Nations Security Council and regional IGOs. Second, it investigates the role of communication and coordination between third parties in their conflict management efforts.

The interest toward Mars exploration has been considerably increasing due to also the successful deployment of the Perseverance rover and the continuous tests developed by SpaceX's launch vehicle, Starship. While the Mars 2020 mission is currently in progress, the first controlled flight on another planet have been proven in April 2021 with the vertical take-off and landing of the Ingenuity rotorcraft on Mars. In addition, the rotorcraft Dragonfly is expected to achieve the same endeavor in Titan, the largest moon of Saturn, by 2036. Continuous efforts have been oriented toward the development of new technologies and aircraft configurations to improve the performance of current proposed designs to achieve powered flight in different planetary bodies. This thesis work is a preliminary study to develop a comprehensive analysis over the generation of optimum airfoil geometries to achieve vertical flight in environments where low Reynolds numbers and Mach number equal to 0.2 and 0.5.

Seminaries in the United States have for more than two centuries sought to equip ministerial leaders for service within the community of faith. And yet these institutions have traditionally been the focus of very little quantitative research. This lack of data is particularly noteworthy given the existential crises many seminaries currently face, especially regarding their flagship Master of Divinity (MDiv) programs. Among seminary leadership, a common response to declining MDiv enrollment has been to decrease the length of the program, which historically required at least 90 credit hours. The purpose of this quantitative study was to explore change at the Association of Theological Schools member institutions (AMIs) between 2000–2019 through the lens of these credit-hour reductions. Longitudinal data from 113 AMIs were analyzed to examine the relationship between a variety of financial, enrollment, and institutional characteristics and the likelihood that an AMI would reduce its required MDiv credit hours. Results from an event history analysis revealed that, all else being equal, experiencing an increase in total revenues reduced an AMI's likelihood of making a reduction, while being a middle-age institution (founded 1870–1959) and having a higher percentage of peer institutions that made a change increased the likelihood of making a …