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Appellate Recruitment Patterns in the Higher British Judiciary: 1850 - 1990 (open access)

Appellate Recruitment Patterns in the Higher British Judiciary: 1850 - 1990

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.
Date: December 2004
Creator: Thomas, Bruce K.
System: The UNT Digital Library
Reconstructing Convention: Ensemble Forms in the Operas of Jules Massenet (open access)

Reconstructing Convention: Ensemble Forms in the Operas of Jules Massenet

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.
Date: December 2004
Creator: Straughn, Gregory
System: The UNT Digital Library

The Confederate Pension Systems in Texas, Georgia, and Virginia: The Programs and the People

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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 …
Date: December 2004
Creator: Wilson, Mary L.
System: The UNT Digital Library

Religiousness, current substance use, and early risk indicators for substance abuse and dependence among nursing students.

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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 …
Date: December 2004
Creator: Gnadt, Bonnie
System: The UNT Digital Library

An Assessment of the Use of Student Price Response Models to Predict Changes in Undergraduate Enrollment at a Metropolitan University

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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 …
Date: December 2004
Creator: Saxon, Randall J.
System: The UNT Digital Library

Callus Development and Organogenesis in Cultured Explants of Cowpea (Vigna unguiculata (L.) Walp

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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 …
Date: December 2004
Creator: Omwenga, George Isanda
System: The UNT Digital Library

Hamiltonian cycles in subset and subspace graphs.

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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.
Date: December 2004
Creator: Ghenciu, Petre Ion
System: The UNT Digital Library

Equity of access: Exploring Internet connectivity within Oklahoma public schools.

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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.
Date: December 2004
Creator: Garrett, Galen
System: The UNT Digital Library

An Investigation into how CACREP Accredited Institutions meet the CACREP Practicum Standards

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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 …
Date: December 2004
Creator: Muro, Joel Hart
System: The UNT Digital Library
Effects of Culturally Responsive Child-centered Play Therapy Compared to Curriculum-based Small Group Counseling with Elementary-age Hispanic Children Experiencing Externalizing and Internalizing Behavior Problems: a Preliminary Study. (open access)

Effects of Culturally Responsive Child-centered Play Therapy Compared to Curriculum-based Small Group Counseling with Elementary-age Hispanic Children Experiencing Externalizing and Internalizing Behavior Problems: a Preliminary Study.

This study was designed to determine the effectiveness of culturally responsive child-centered play therapy when compared to a curriculum-based small group counseling intervention as a school-based intervention for Hispanic children experiencing behavioral problems that place them at risk for academic failure. Specifically, this study measured the effects of the experimental play therapy treatment, compared to Kids' Connection, on reducing Externalizing and Internalizing behavior problems of elementary school-age Hispanic children. Twenty-nine volunteer Hispanic children were randomized to the experimental group (n=15) or the comparison group (n=14). Subjects participated in a weekly 30 minute intervention for a period of 15 weeks. Pre- and posttest data were collected from parent and teachers using the Behavior Assessment Scale for Children (BASC). A two factor mixed repeated measures analysis of variance was computed for each hypothesis, to determine the statistical and practical significance of the difference in the pretest to posttest behavior scores of children in the two groups. According to parents' reports, the children receiving play therapy showed statistically significant decreases in externalizing behaviors problems, specifically conduct problems, and moderate improvements in their internalizing behavior problems, specifically anxiety. Teacher BASC results showed no statistical significance and negligible-to- small practical significance between the two groups …
Date: December 2004
Creator: Garza, Yvonne
System: The UNT Digital Library
Revisiting Aldo Leopold's "Perfect" Land Health: Conservation and Development in Mexico's Rio Gavilan (open access)

Revisiting Aldo Leopold's "Perfect" Land Health: Conservation and Development in Mexico's Rio Gavilan

The Rio Gavilan watershed, located in Mexico 's northern Sierra Madre Occidental , has significance in conservation history. Upon visiting the remote, largely un­developed watershed during two hunting trips in the 1930s, renowned conservationist Aldo Leopold thought it was the best picture of land health he had seen. His main indicators of healthy land were slow water runoff rates regulating erosion and historical predator-prey relationships. The visits confirmed Leopold's concept of land health, inspired many of his essays, and helped shape his land ethic. Leopold proposed the area as a control site to research healthy land throughout North America . The proposal never went forward and the area has since been more intensively logged and grazed. This dissertation research used extensive literature review, archives, oral histories, citizen surveys, and rapid assessment of forest, rangeland, riparian, and socioeconomic health to assess impacts of past cultures and update the area's land health status. Projects that could restore land health, such as linked eco-tourism, forest density reduction, and rotational grazing, were assessed for feasibility. Recent critiques of Leopold's land ethic were also reviewed. Results indicate most pre-1940s impacts were light, current land health status is moderate, and local interest exists in restoring land …
Date: December 2004
Creator: Forbes, William
System: The UNT Digital Library
Perceptions of parents of students with autism towards the IEP meeting. (open access)

Perceptions of parents of students with autism towards the IEP meeting.

The purpose of the study was to investigate how parents of students with autism perceived individualized education program (IEP) meetings. I determined factors that contributed to the belief held by parents that their children were or were not being properly served by IEP meetings. Parental relationships with educators, IEP meeting experiences, IEP outcomes, and treatment by educators were revealed through participant input. Parents were asked to share their experiences of previous IEP meetings. Additionally, parents provided input regarding practices that school districts could take to improve IEP meetings, and actions that parents could take to serve as better advocates for their children. Research findings indicated that parents did not perceive themselves as being treated as equals during IEP meetings. Parents believed that their input was not valued or welcomed by educators. Not having an equal voice toward their child's education prevented parents from positively influencing outcomes in their child's IEP meetings in terms of obtaining quality services and building positive relations with educators. Parents further revealed that educators failed to implement proper IEP protocol. According to parents, student objectives agreed upon in IEP meetings were often not always fully implemented for students receiving special education services. Research findings concluded that …
Date: December 2004
Creator: Fish, Wade W.
System: The UNT Digital Library
Impact of Core Knowledge Curriculum on Reading Achievement (open access)

Impact of Core Knowledge Curriculum on Reading Achievement

The purpose of this study was to examine the impact of Core Knowledge curriculum, a Comprehensive School Reform model, on the reading achievement of elementary students located in a north Texas suburban school district. A repeated measures, matched-comparison design was employed using longitudinal data over a three year period. Repeated measures analyses of variance (ANOVA) were conducted to determine if there were any significant differences in student achievement scores as measured by the Texas Assessment of Knowledge and Skills (TAKS) test. The experimental and control school were examined for student achievement gains overall, for advantaged versus disadvantaged students and for achievement gap differences. Although the results of the statistical analyses indicated that there were no significant differences in the reading TAKS scores of students participating in the study, experimental school students consistently had higher mean scores when compared to the control school in all areas. The evaluation of the achievement gap revealed that although the Core Knowledge school did not close the achievement gap between advantaged and disadvantaged students, the disadvantaged students' scores rose in proportion to the advantaged students, thus preventing an increase in the achievement gap between students.
Date: December 2004
Creator: Brading, Aungelique R.
System: The UNT Digital Library
Student Outcomes in Selected Distance Learning and Traditional Courses for the Dallas County Community College District: A Pilot Study (open access)

Student Outcomes in Selected Distance Learning and Traditional Courses for the Dallas County Community College District: A Pilot Study

The study compared outcomes for distance learning courses with those of traditional courses offered by the seven campuses of Dallas County Community College District (DCCCD). The course outcomes were defined as completion rate, dropout rate and success rate. Eleven courses offered during the fall 2003 semester were selected for the study. The methods of instruction employed for each course were traditional classroom lecture/discussion and distance learning formats of Internet, TeleCourse and TeleCourse Plus. Internet courses are delivered on-line, using Internet access and a browser, TeleCourse uses one-way videos or public broadcasting, and TeleCourse Plus is a hybrid between Internet and TeleCourse courses. Seven of the courses selected were part of the core curriculum approved by Texas Higher Education Coordinating Board (THECB) while four other courses were completely transferable. Two types of specific data were extracted: course data and individual student data. Course data included method of instruction, length of course, instructor's load, enrollment, number of withdrawals, and grade distribution. In addition, course requirements including the use of email, videos and Internet, orientation and testing on campus were added as variables. The student data included demographic variables such as age, gender, ethnicity, family status, employment and academic variables including number of …
Date: December 2004
Creator: Borcoman, Gabriela
System: The UNT Digital Library
Domestic Violence Study for Counselor Education Masters Students (open access)

Domestic Violence Study for Counselor Education Masters Students

The issue of domestic violence continues to be of great concern to society. It is crucial counselors have an understanding of dynamics of domestic violence and the impact it has on victims. Even with heightened awareness of the past decade, the issue continues to be misunderstood, missed altogether by counselors, and sometimes misdiagnosed. This study was created to explore the level of understanding masters level counseling students have of domestic violence, battering behavior, victimization, socioeconomic preconceptions, and counseling victims. Masters level counseling students from the University of North Texas, Denton, TX and staff members of two battered women's shelters from the Dallas, TX area participated in a survey to identify the level of knowing and sensitivity to the issue of domestic violence. Upon completion, an independent t-test was conducted to measure differences in these areas between the two groups. Results indicate a need for counseling students to better understand this issue and implications for client/victims.
Date: December 2004
Creator: Beechler, Judith
System: The UNT Digital Library
The Snare Drum as a Solo Concert Instrument: An In-Depth Study of Works by Milton Babbitt, John Cage, Dan Senn, and Stuart Saunders Smith, Together with Three Recitals of Selected Works by Keiko Abe, Daniel Levitan, Askell Masson, Karlheinz Stockhausen, and Others (open access)

The Snare Drum as a Solo Concert Instrument: An In-Depth Study of Works by Milton Babbitt, John Cage, Dan Senn, and Stuart Saunders Smith, Together with Three Recitals of Selected Works by Keiko Abe, Daniel Levitan, Askell Masson, Karlheinz Stockhausen, and Others

This dissertation discusses the potential of the snare drum as a solo concert instrument. Four pieces from a collection entitled The Noble Snare are used for demonstration ("Homily" by Milton Babbitt, "Composed Improvisation for Snare Drum" by John Cage, "Peeping Tom" by Dan Senn, and "The Noble Snare" by Stuart Saunders Smith). In the absence of many traditional musical devices (i.e. melody and harmony), alternative means of expression are used by the composer. Each piece is discussed with regard to its distinctive compositional approach and inherent performance issues. Information is also given pertaining to the background of the Noble Snare series. This includes: the inspiration for the project, editorial issues, and its influence on snare drum performance. Much of this research was completed through interviews by with author with Sylvia Smith, publisher of The Noble Snare and owner of Smith Publications.
Date: December 2004
Creator: Baker, Jason Colby
System: The UNT Digital Library
From inside the Arab family: What literacy practices occur when raising bilingual and biliterate children? (open access)

From inside the Arab family: What literacy practices occur when raising bilingual and biliterate children?

Living in the United States creates unique challenges in biliteracy and bilingualism for the Arab family. While extant literature provides insight into the literacy interactions and experiences of families from many other cultures now living in the U.S. , there is next to nothing regarding the Arab family literacy experience. Thus, knowledge about the literacy activities Arab families engage in as they gain access to and knowledge of a new culture and language is important. The purpose of this study was to investigate and describe the literacy practices of the Arab families raising bilingual and biliterate children in the U.S. This study , using methodology based on ethnographic approaches, investigated the literacy events, behaviors and interactions which occurred within one Arab family over a 16-week period. A second group of participants were 5 other Arab families living in the U.S. Data sources included video and audio recordings, field notes, observations, journals, informal interviews, and artifacts of children's literacy. The researcher and the participants engaged as co-participants in the research. Findings showed that driving factors behind home literacy practices were religious beliefs and the imminence of return to the home country. Arab mothers were found to yield a heavy influence on …
Date: December 2004
Creator: Alshaboul, Yousef Mohammad
System: The UNT Digital Library
The Effect of Individual Versus Collective Creative Problem Solving Experiences on Fourth- and Fifth-grade Students' Compositional Products. (open access)

The Effect of Individual Versus Collective Creative Problem Solving Experiences on Fourth- and Fifth-grade Students' Compositional Products.

The purpose of the study was to explore the effects that individual vs. collective structured creative musical problem solving tasks had on students' compositional products. Subjects in a convenience sample of 32 fourth-graders and 32 fifth-graders were randomly assigned to either the individual or collective condition. The 3 treatment sessions were characterized by an open-ended creative problem solving task, which included questions intended to guide subjects through 3 stages of the creative problem solving process: Understanding the Problem, Generating Ideas, and Planning for Action. Subjects participated in the pre- and posttest individually. Three experienced music educators assessed the compositional products in terms of pattern use, cohesiveness, and creativity. The originally intended MANCOVAs could not be carried out because the data did not meet the necessary assumptions. Pretest and posttest scores were explored with individual ANOVAs. The Bonferroni technique was used to adjust the alpha level. The statistical analyses showed that subjects exposed to the individual condition obtained higher scores than subjects exposed to the collective condition on six of the eight explored subtests, but these differences were not significant. The level of interjudge reliability decreased at each of the three measurements of the study: pilot test, pretest, and posttest. The …
Date: December 2004
Creator: Aguilar, Beatriz E.
System: The UNT Digital Library
Reduction of Anomie through the Use of Say It Straight™ Training (open access)

Reduction of Anomie through the Use of Say It Straight™ Training

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 …
Date: December 2004
Creator: Wood, Thomas Erin
System: The UNT Digital Library
Effects of Child-Centered Play Therapy and Curriculum-Based Small-Group Guidance on the Behaviors of Children Referred for Aggression in an Elementary School Setting (open access)

Effects of Child-Centered Play Therapy and Curriculum-Based Small-Group Guidance on the Behaviors of Children Referred for Aggression in an Elementary School Setting

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 …
Date: December 2004
Creator: Schumann, Brandy R.
System: The UNT Digital Library
The Influence of Perceived Career Barriers on College Women's Career Planning (open access)

The Influence of Perceived Career Barriers on College Women's Career Planning

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 …
Date: December 2004
Creator: Raiff, Gretchen Wade
System: The UNT Digital Library
Synthesis and characterization of crystalline assembly of poly Nisopropylacry-lamide)-co-acrylic acid nanoparticles. (open access)

Synthesis and characterization of crystalline assembly of poly Nisopropylacry-lamide)-co-acrylic acid nanoparticles.

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 …
Date: December 2004
Creator: Zhou, Bo
System: The UNT Digital Library
Tantalum- and ruthenium-based diffusion barriers/adhesion promoters for copper/silicon dioxide and copper/low κ integration. (open access)

Tantalum- and ruthenium-based diffusion barriers/adhesion promoters for copper/silicon dioxide and copper/low κ integration.

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 …
Date: December 2004
Creator: Zhao, Xiaopeng
System: The UNT Digital Library
Placement in the prekindergarten bilingual and English as a second language programs as a predictor of reading achievement of 3rd grade students. (open access)

Placement in the prekindergarten bilingual and English as a second language programs as a predictor of reading achievement of 3rd grade students.

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 …
Date: December 2004
Creator: Vannoy, Martha
System: The UNT Digital Library