Recital presented at St. Barnabas Presbyterian Church, Dallas in partial fulfillment of the Doctor of Musical Arts (DMA) degree.

The barrier properties and long term strength retention of polymers are of significant importance in a number of applications. Enhanced lifetime food packaging, substrates for OLED based flexible displays and long duration scientific balloons are among them. Higher material requirements in these applications drive the need for an accurate measurement system. Therefore, a new system was engineered with enhanced sensitivity and accuracy. Permeability of polymers is affected by permeant solubility and diffusion. One effort to decrease diffusion rates is via increasing the transport path length. We explore this through dispersion of layered silicates into polymers. Layered silicates with effective aspect ratio of 1000:1 have shown promise in improving the barrier and mechanical properties of polymers. The surface of these inorganic silicates was modified with surfactants to improve the interaction with organic polymers. The micro and nanoscale dispersion of the layered silicates was probed using optical and transmission microscopy as well as x-ray diffraction. Thermal transitions were analyzed using differential scanning calorimetry. Mechanical and permeability measurements were correlated to the dispersion and increased density. The essential structure-property relationships were established by comparing semicrystalline and amorphous polymers. Semicrystalline polymers selected were nylon-6 and polyethylene terephthalate. The amorphous polymer was polyethylene terphthalate-glycol. Densification …

The United States government began paying pensions to disabled Union veterans before the Civil War ended in April 1865. By 1890 its pension programs included any Union veteran who had fought in the Civil War, regardless of his financial means, as well as surviving family members, including mothers, fathers, brothers, and sisters. Union veterans did not hesitate to "wave the bloody shirt" in their attempts to liberalize pension laws. Pension programs for Confederate veterans were much slower to develop. Lacking any higher organization, each southern state assumed the responsibility of caring for disabled and/or indigent Confederate veterans and widows. Texas began paying Confederate pensions in 1899, Georgia in 1888 and Virginia in 1889. Unlike Texas, Georgia and Virginia provided artificial limbs for their veterans long before they started paying pensions. At the time of his enlistment in the 1860s, the typical future pensioner was twenty-five years of age, and fewer than half were married heads of households. Very few could be considered wealthy and most were employed in agriculture. The pensioners of Georgia, Texas, and Virginia were remarkably similar, although there were some differences in nativity and marital status. They were all elderly and needy by the time they asked …

This study seeks to advance the understanding of appellate promotion in the senior judiciary of Great Britain . It describes the population and attributes of judges who served in the British High Courts, Court of Appeal, and Appellate Committee of the House of Lords (i.e., Law Lords) from 1850 to 1990. It specifically builds upon the work of C. Neal Tate and tests his model of appellate recruitment on a larger and augmented database. The study determines that family status, previously asserted as having a large effect on recruitment to the appellate courts, is not as important as previously believed. It concludes that merit effects, professional norms, and institutional constraints offer equally satisfactory or better explanations of appellate recruitment patterns.

Over the last quarter-century, scholars have taken a unified approach in discussing form in Italian and French opera of the nineteenth century. This approach centers around the four-part aria and duet form begun by Bellini, codified by Rossini, modified by Verdi, and dissolved by Puccini. A similar trajectory can be seen in French opera in the works of Meyerbeer, Gounod, and Massenet; however, only Meyerbeer and Gounod have received significant critical attention. This is in part due to Massenet's reception as a "composer for the people," a title ill fitting and ripe for reconsideration. This dissertation will examine duet forms in Massenet's oeuvre and will focus on the gradual change in style manifest in his twenty-five operas. Massenet's output can be divided into three distinct periods delineated by his approach to form. Representative works from each period will show how he inherited, interpreted, thwarted, and ultimately rewrote the standard formal conventions of his time and in doing so, created a dramaturgical approach to opera that unified the formerly separate number-based elements. Massenet's longevity and popular appeal make him the quintessential French opera composer of the fin de siècle and the natural choice for examining reconstructed conventions.

Most colleges and universities invest substantial resources in an effort to strategically plan for a sound financial base. The revenue for the financial base is dependent on student enrollment that must be effectively managed. Increases in the price of tuition and fees can lead to decreased enrollment and negatively impact the revenue of an institution. The increases can also impact the enrollment of certain student populations such as minority students and high school graduates enrolling in college for the first time. Many studies have analyzed the price elasticity and student price response models that have been developed over time by reviewing historical price increases and enrollment across institutions. Few studies have used the models to predict changes in the enrollment of students for one college or university after the increases in the cost of attendance are imposed on students. This study sought to analyze the effectiveness of the most commonly reviewed student price response and price elasticity models in predicting changes in undergraduate enrollment at one metropolitan academic university. The three models introduced by Leslie and Brinkman, St. John and Heller were used to analyze the tuition and fee increases and to identify the likely percentage of increase or decrease …

Cowpea, Vigna unguiculata (L.) Walp is an excellent source of protein, vitamins and minerals and a major food crop many parts of Africa. Optimal production levels are hampered by insect pests and diseases. Biotechnological techniques such as tissue culture and genetic engineering can aid in the development of varieties with resistance to insect pests and diseases. The objective of this study was to investigate conditions necessary for the development of a reproducible tissue culture system that can be applied to regenerate transformed cells from culture. The in vitro manipulation of cowpea using Murashige and Skoog (MS) medium, auxins and cytokinins resulted in the formation of callus and rhizogenesis. Calli that were formed were separated into six classes based on color and texture. Yellowish friable callus, yellowish compact, soft yellowish callus and green and white were composed of largely vacuolated cells and were non-regenerative. Friable green callus was the most prevalent callus type and could form of roots in some hormone combinations. Green spots were formed on hard compact green callus. The green spots became nodular, forming root primordia and ultimately giving rise to roots. None of the six calli types gave rise to the formation of shoots. Embryogenic callus was …

This study was designed to determine how institutions accredited by the Council for the Accreditation of Counseling and Related Educational Programs (CACREP) meet the practicum requirements set forth in CACREP's 2001 standards. Practicum is a vital part of the matriculation process of counselors in training. This clinical based course allows students to practice the skills they have learned in previous, more didactic based courses. Trainees can stretch skills, all under the watch of a counselor supervisor with greater experience. Although CACREP instructs all accredited counseling programs to have such a course in place, the standards are not specific. Schools are often interpreting the standards in a multitude of ways, presumably to successfully meet the standards while still serving the student as well as the clientele who seek out mental health assistance (Pitts, 1992a). The purpose of this study was to determine what measures CACREP accredited institutions enact to meet the clinical practicum standards. The difference between this study and prior research that has addressed the practicum requirement is that the instrument used in this study specifically addressed every CACREP practicum standard, including technology, diversity, and concerns with supervision and meeting the direct client contact hour requirement. The results of the …

In this dissertation we study the Hamiltonicity and the uniform-Hamiltonicity of subset graphs, subspace graphs, and their associated bipartite graphs. In 1995 paper "The Subset-Subspace Analogy," Kung states the subspace version of a conjecture. The study of this problem led to a more general class of graphs. Inspired by Clark and Ismail's work in the 1996 paper "Binomial and Q-Binomial Coefficient Inequalities Related to the Hamiltonicity of the Kneser Graphs and their Q-Analogues," we defined subset graphs, subspace graphs, and their associated bipartite graphs. The main emphasis of this dissertation is to describe those graphs and study their Hamiltonicity. The results on subset graphs are presented in Chapter 3, on subset bipartite graphs in Chapter 4, and on subspace graphs and subspace bipartite graphs in Chapter 5. We conclude the dissertation by suggesting some generalizations of our results concerning the panciclicity of the graphs.

The purposes of this study were to examine the prevalence of current substance use and early risk indicators for substance abuse and dependence, and to investigate the relationships among religiousness, current substance use, and early risk indicators among nursing students at seven Seventh-day Adventist colleges. Data for this descriptive study were collected through Efinger's Alcohol Risk Survey (EARS) (Efinger, 1984), the CAGE Questionnaire ( Ewing , 1984), and the Intrinsic/Extrinsic-Revised Scale (Gorsuch & McPherson, 1989). Participants were 241 nursing students enrolled in their first year of nursing courses at seven colleges and universities located across the United States . Findings indicated that 42% of students scored higher than the EARS mean; 24% reported current substance use; and 15% scored in the probable abuse/dependence category of CAGE. Students who reported current substance use and those scoring in the probable substance abuse/dependence category were significantly more likely to score above the EARS median. Intrinsic religiousness demonstrated a significant inverse relationship with current substance use. Significantly lower rates of current substance use were associated with higher rates of attendance at religious services. Respondents who indicated that their religion prohibited alcohol consumption reported significantly lower rates of current substance use than those who answered …

The purpose of this study was to ascertain if conditions or combinations of conditions existed within Oklahoma public schools that created inequities in the availability of classroom Internet connections. A stratified random sample of the 471 school districts was used to identify 300 specific schools for the purpose of data analysis. Data was gathered utilizing a database provided by the Oklahoma State Department of Education and a researcher developed questionnaire. The database provided data relating to four independent variables (region, district size, school type, and school size,). The dependent variable, percentage of classrooms connected to the Internet, was obtained by the researcher designed questionnaire. The state database also provided percentage information relating to students who qualify as minorities and qualify for free or reduced lunches. The data was tested using a series of ANOVAs and a Pearson product-moment correlation coefficient. The findings of the study are as follows: (a) The analysis of variance showed that none of the independent variables had a significant effect upon the percentage of classrooms connected to the Internet; (b) The Pearson product-moment correlation coefficient revealed little or no correlation between the percentage of disadvantaged or minority students and the percentage of classroom Internet connections.

Scholars have considered Italian chamber recitative laments only a transitional phenomenon between madrigal laments and laments organized on the descending tetrachord bass. However, the recitative lament is distinguished from them by its characteristic attitude toward the relationship between music and text. Composer of Italian chamber recitative laments attempted to express more subtle, refined and sometimes complicated emotion in their music. For that purpose, they intentionally created discrepancies between text and music. Sometimes they even destroy the original structure of text in order to clearly deliver the composer's own voice. The basic syntactic structure is deconstructed and reconstructed along with their reading and according to their intention. The discrepancy between text and music is, however, expectable and natural phenomena since text cannot be completely translated or transformed to music and vice versa. The composers of Italian chamber recitative laments utilized their innate heterogeneity between two materials (music and text) as a metaphor that represents the semantic essence of the genre, the conflict. In this context, Italian chamber recitative laments were a real embodiment of the so-called seconda prattica and through the study of them, finally, we more fully able to understand how the spirit of late Renaissance flourished in Italy in …

One of the main goals of computational methods is to identify reasonable geometries for target materials. Organometallic complexes have been investigated in this dissertation research, entailing a significant challenge based on transition metal diversity and the associated complexity of the ligands. A large variety of theoretical methods have been employed to determine ground state geometries of organometallic species. An impressive number of transition metals entailing diverse isomers (e.g., geometric, spin, structural and coordination), different coordination numbers, oxidation states and various numbers of electrons in d orbitals have been studied. Moreover, ligands that are single, double or triple bonded to the transition metal, exhibiting diverse electronic and steric effects, have been investigated. In this research, a novel de novo scheme for structural prediction of transition metal complexes was developed, tested and shown to be successful.

The purpose of the current study was to investigate the effects of a multidisciplinary pain management program on five measures of subjective psychosocial factors. Ninety-five participants in the comprehensive multidisciplinary treatment group and the standard medical intervention control group were surveyed about various psychosocial factors using Axis II of the West Haven - Yale Multidimensional Pain Inventory (MPI), pre- to post-treatment. It was hypothesized that post-treatment levels would be significantly lower than pre-treatment levels for all five psychosocial variables. Additionally, gender and ethnicity variables were examined. Based on preliminary analyses indicating pre-treatment differences between the experimental and control group, five 2 x 2 x 3 analyses of covariances (ANCOVAs) were used to examine the above hypotheses. Results indicated significant differences between the treatment conditions on measures of control, with the comprehensive group feeling more in control than the standard group at post-treatment. No other significant main effects for treatment condition were found on the measures of pain severity, interference with daily activities, negative mood, or social support. However, a significant gender main effect was found for social support at post-treatment, with females reporting more social support than males. A significant gender x ethnicity interaction was also found for post-treatment control, …

In this study, crystalline poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAm-co-AAc) nanoparticle network in organic solvents was obtained by self assembling precursor particles in acetone/epichlorohydrin mixture at room temperature followed by inter-sphere crosslinking at ~98 °C. The crystals thus formed can endure solvent exchanges or large distortions under a temporary compressing force with the reoccurrence of crystalline structures. In acetone, the crystals were stable, independent of temperature, while in water crystals could change their colors upon heating or changing pH values. By passing a focused white light beam through the crystals, different colors were displayed at different observation angles, indicating typical Bragg diffraction. Shear moduli of the gel nanoparticle crystals were measured in the linear stress-yield ranges for the same gel crystals in both acetone and water. Syntheses of particles of different sizes and the relationship between particle size and the color of the gel nanoparticle networks at a constant solid content were also presented. Temperature- and pH- sensitive crystalline PNIPAm-co-AAc hydrogel was prepared using osmosis crosslinking method. Not only the typical Bragg diffraction phenomenon was observed for the hydrogel but also apparent temperature- and pH- sensitive properties were performed. The phase behavior of PNIPAm nanoparticles dispersed in water was also investigated using a …

The majority of books about Saint-Säens cover his life, compositions, contemporaries, and French music in general. Although his life is well documented, most sources present only brief analyses of his works; there is not one single comprehensive and exhaustive study of the Piano Concerto in F Major, Opus 103, available in the current literature. This study aims at filling the gap by providing other musicians interested in performing this piece with an initial study-guide. The research for this study focuses on several aspects of Saint-Säens' music. The currently available literature and past research is thoroughly examined, appraised, and quoted when relevant to the discussion. The original score of the concerto is analyzed regarding its form, compositional style, and performance indications. Diagrams, charts, and musical examples are presented to illustrate and substantiate the researcher's conclusions. Chapter I presents the topic and purpose of this study, a brief biography of Saint-Säens, a chronological overview of his five piano concertos, and the historical background of the Piano Concerto No. 5 in F Major, Opus 103. Chapter II presents a formal analysis and a compositional analysis of Opus 103. Chapter III presents a perspective of Saint-Säens playing style and performance recommendations by the author. …

The TaSiO6 films, ~8Å thick, were formed by sputter deposition of Ta onto ultrathin SiO2 substrates at 300 K, followed by annealing to 600 K in 2 torr O2. X-ray photoelectron spectroscopy (XPS) measurements of the films yielded a Si(2p) binding energy at 102.1 eV and Ta(4f7/2) binding energy at 26.2 eV, indicative of Ta silicate formation. O(1s) spectra indicate that the film is substantially hydroxylated. Annealing the film to > 900 K in UHV resulted in silicate decomposition to SiO2 and Ta2O5. The Ta silicate film is stable in air at 300K. XPS data show that sputter-deposited Cu (300 K) displays conformal growth on Ta silicate surface (TaSiO6) but 3-D growth on the annealed and decomposed silicate surface. Initial Cu/silicate interaction involves Cu charge donation to Ta surface sites, with Cu(I) formation and Ta reduction. The results are similar to those previously reported for air-exposed TaSiN, and indicate that Si-modified Ta barriers should maintain Cu wettability under oxidizing conditions for Cu interconnect applications. XPS has been used to study the reaction of tert-butylimino tris(diethylamino) tantalum (TBTDET) with atomic hydrogen on SiO2 and organosilicate glass (OSG) substrates. The results on both substrates indicate that at 300K, TBTDET partially dissociates, forming …

The financial cost for health care and lost productivity due to chronic pain has been estimated at over $70 billion per year. Researchers have attempted to discover the psychosocial and personality factors that discriminate between people who learn to cope well with chronic pain and those who have difficulty adjusting. The purpose of the present study was to examine the effects of perceived locus of control and dispositional optimism on chronic pain treatment outcomes. Subjects reported significantly lower post-treatment pain levels as compared with pre-treatment levels (M = 0.66, SD = 1.58), t(45) = 2.85, p = .007 (two-tailed), but decreased pain was not associated with scores on the internality dimension of the Pain Locus of Control Scale (PLOC) or on the Life Orientation Test-Revised (LOT-R) (a measure of dispositional optimism). Overall, participants' increased coping ability was associated with scores on the LOT-R, but not with scores on the internality dimension of the PLOC. Subjects with the lowest pre-treatment scores on the LOT-R demonstrated significantly greater increases in post-treatment coping ability than those with the highest scores (F(2,40) = 3.93, p < .03). Participants with the highest pre-treatment scores on both the PLOC internality dimension and the LOT-R demonstrated greater …

This study evaluated the Say It Straight™ (SIS) Training Program for its ability to improve straightforward communication, increase self-esteem, increase an individual's overall perception of group and family belonging or cohesiveness within a residential treatment setting and decrease an individual's perceived level of anomie. Effectiveness of SIS training was evaluated with paired sample t-tests (2-tailed) on six objective questionnaires given before and after training. Participation in the study was voluntary. Of the 39 patients in residence, 26 participated in SIS training, (23 attended over 80% of the sessions and 3 attended over 50%). Three were excluded from the study due to developmental or dementia-related diagnoses, 3 chose not to participate, 5 were discharged routinely prior to completion and were not post-tested; and 2 were discharged against medical advice during the training. It is interesting to notice that on the average there are about 5 discharges against medical advice per month at the facility, but during the five weeks of SIS there were only 2. Self-reports of empowering behaviors, quality of family and group life and self-esteem showed highly significant increases following SIS. Self-reports of disempowering behaviors (placating, passive-aggressive, blaming, irrelevant, intellectualizing) showed highly significant decreases following SIS and anomie showed …

At the beginning of the 21st century, few challenges for educators compared to that of meeting the academic needs of the growing number of limited English proficient (LEP) students. Divergent views on whether those needs were best met through instruction in the student's first language and English, known as bilingual education, or instruction solely in English, compounded the challenge and led to varied language support programs. The present study looked at the prekindergarten (preK) language support program as a predictor of 3rd grade reading achievement of students with the intention of helping educators understand how best to serve LEP students. The study included an analysis of 3rd grade reading achievement for four groups of students with a primary home language of Spanish who attended bilingual or ESL prekindergarten. Multivariate analysis of variance (MANOVA) followed by descriptive discriminant analysis (DDA) was used to analyze scores from the Iowa Tests of Basic Skills (ITBS) reading test and the Texas Assessment of Knowledge and Skills (TAKS) reading test. No statistically significant difference in 3rd grade reading achievement was found among the four groups at the .05 level. There was, however, a small-to-medium effect size. The MANOVA indicated that the group to which the …

The purpose of this study was to determine the effectiveness of child-centered play therapy and curriculum-based small-group guidance on the behaviors of aggressive children in an elementary school as determined by (a) the reduction of aggressive behaviors, (b) the decrease in internalizing problems, and (c) the decrease in externalizing problems of aggressive children. Two types of behavioral instruments, the Behavioral Assessment System for Children-Teacher Rating Scale/Parent Rating Scale and the Child Behavior Checklist-Caregiver/Teacher Report Form, were used to provide multiple measures of the same construct in this matched pretest-posttest comparison group experimental designed study. Qualitative data was also collected. The population studied was comprised of 37 volunteer children identified as aggressive in kindergarten through fourth grade, ages 5-12, who qualified for counseling services at a Title I public elementary school in North Texas . Children who were referred by teachers and parents, and met the required criteria, were matched in pairs on grade level and randomly assigned to one of the two real-world setting interventions; play therapy treatment group (n=20), which received 12-15 individual child-centered play therapy sessions, or the curriculum-based small-group guidance group (n=17), consisting of 12-19 lessons. Major strengths of the study included utilizing students referred for counseling …

Research has indicated that balancing work and family is on the minds of college-age women long before they are married. At the same time, women continue to choose occupations that do not fully utilize their abilities and often fail to follow their original career goals. The purpose of this study was to examine the influence of perceived career barriers and supports on young women's career planning. Utilizing Social Cognitive Career Theory (SCCT) and recent literature as a basis, this study conceptualized career goals using the two constructs career salience and career aspirations. Based on information garnered in this student's thesis and on studies examining pathways in the SCCT model, the current study used a hierarchical regression model and hypothesized that barriers related to work and family conflict and sex discrimination would have the most impact on the career aspirations and career salience of young women. Career supports were hypothesized to add significantly to the prediction of these variables, and coping self-efficacy for these types of barriers were hypothesized to depend on the level of these types of barriers perceived and the interaction effect was in turn expected to add significantly to the prediction of career aspirations and career salience. None …

A review of literature indicates limited effort to understand and explain employees' acclimation to, and adoption of, new behaviors required by organization change initiatives. Psychological theories of individual behavior change have, in restricted instances, been applied into organizational environments. The transtheoretical model of change (TTM) offers a comprehensive explanation of behavior change uniting multiple theories of individual change. TTM describes change as a series of stages that individual progress through before arriving at the decision to implement a change in behavior. Movement through the stages is facilitated by processes which increase the probability of a behavior change effort's success. The present research investigated the potential applicability of TTM for explaining individual level change within a new context, specifically, an organizational environment. To examine if individual change in the context of an organization occurs in the fashion described by TTM, measures of core TTM constructs were delivered to employees in a water department of a city in the American southwest. The water department was immersed in an organization change initiative necessitating individual behavior change by its employees. Results of TTM core construct measures and their relationships with each other and the stages of change were examined. Initial findings are indicative of …

Today's global culture makes communication through writing in a foreign language a most desirable tool to expand personal and professional relations. However, teaching writing is a complex, time-consuming endeavor in any language. Foreign language teachers at every level struggle to fit writing into an already full curriculum and need the most effective methods and tools with which to teach. Technology may provide a viable scaffold to support writing instruction for teachers and students. The purpose of this research was to determine any benefits of weekly/structured, in-class, computer-assisted grammar drill and practice on the composition quality and quantity of intermediate university Spanish learners. A related purpose was to determine whether students who participated in such practice would access a computer-based writing assistant differently during writing than students without the treatment. The research design was a nonequivalent groups pretest-posttest design. Fifty-two subjects' compositions were graded with both holistic and analytic criteria to analyze composition quality and quantity, and statistical analyses assessed interactions of treatment and effects. The computer-based Atajo writing assistant, which could be accessed during composition, had a logging feature which provided unobtrusive observation of specific databases accessed by each student. There were no statistically significant differences found between the two …