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Photophysical studies of silver(I), platinum(II), palladium(II), and nickel(II) complexes and their use in electronic devices.

Photophysical studies of silver(I), platinum(II), palladium(II), and nickel(II) complexes and their use in electronic devices.

Date: December 2007
Creator: Hudson, Joshua M.
Description: This dissertation deals with two major topics that involve spectroscopic studies of (a) divalent group 10 metals and (b) silver(I)-phosphine complexes. The scope of the work involved the delineation of the electronic structure of these complexes in different environments and their use in electronic devices. The first topic is a look at the luminescence of tetrahedral silver(I)-phosphine complexes. Broad unstructured emissions with large Stokes shifts were found for these complexes. Computational analysis of the singlet and triplet state geometries suggests that this emission is due to a Jahn-Teller type distortion. The second topic represents the major thrust of this research, which is an investigation into the electronic structure of M(diimine)X2 (M= Pt(II), Pd(II), or Ni(II); X = dichloro, or dithiolate ligands) complexes and their interactions with an electron acceptor or Lewis acid. Chapter 3 assesses the use of some of these complexes in dye sensitized solar cells (DSSCs); it is shown that these complexes may lead to a viable alternative to the more expensive ruthenium-based dyes that are being implemented now. Chapter 4 is an investigation into donor/acceptor pairs involving this class of complexes, which serves as a feasibility test for the use of these complexes in organic photo-voltaics (OPVs) ...
Contributing Partner: UNT Libraries
Motivic development in the piano music of Karl Weigl (1881-1949).

Motivic development in the piano music of Karl Weigl (1881-1949).

Date: December 2007
Creator: Gray, Justin
Description: In discussing the music of Karl Weigl (1881-1949), it is essential to estimate the state of research regarding the composer and his professional life. Although a copious account and collection of Weigl's papers exists at Yale University, much contribution in the form of editions, recordings, and scholarly texts is needed. Schooled by Adler, Schoenberg, and Zemlinsky, Weigl graduated from the Musikacademie of Vienna in 1899 with high honors, with later employment in the Vienna Opera as a vocal coach (where he worked with such figures as Bruno Walter, Friedrich Weidemann, and Lotte Lehmann.). A theory and composition appointment to the New Vienna Conservatory after 1918 dramatically opened Weigl's professional horizons. With the rise of anti-semitism in Nazi Germany, Weigl and his family escaped to New York in autumn 1938. Eventually, Weigl obtained positions in the Hartt School of Music, Brooklyn College, Boston Conservatory, and finally, the Philadelphia Academy of Music in 1948. Although Weigl's music has been commented upon by Stephen Davison, Wendell Davis, and Michael Kater, much literature in the form of published analysis, commentary, and biography has yet to come forward. This paper principally covers Weigl's Night Fantasies, Op. 13 as well as the 28 Variations for Piano, ...
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The Influence of Jazz on the Solo Trumpet Compositions of Eugène Bozza

The Influence of Jazz on the Solo Trumpet Compositions of Eugène Bozza

Date: December 2007
Creator: Dovel, Jason
Description: This paper investigates the influence of jazz on the nine solo trumpet compositions of the French composer Eugène Bozza (1905-1991). Bozza, like many other French composers in the first half of the 20th century, combines traditional elements of western European art music with innovations of American popular music. While Bozza holds a prominent role as a composer of solo trumpet literature in the mid-20th century, little has been written about the influence of jazz in his works. This paper traces the influences of American jazz upon French composers and analyzes the elements of jazz within Bozza's compositions for solo trumpet by comparing them to conventions employed by jazz composers.
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An analysis of the syntactic and lexical features of an Indian English oral narrative: A Pear Story study.

An analysis of the syntactic and lexical features of an Indian English oral narrative: A Pear Story study.

Date: December 2007
Creator: Seale, Jennifer Marie
Description: This pilot study addresses the distribution of nonstandard syntactic and lexical features in Indian English (IE) across a homogeneous group of highly educated IE speakers. It is found that nonstandard syntactic features of article use, number agreement and assignment of verb argument structure do not display uniform intragroup distribution. Instead, a relationship is found between nonstandard syntactic features and the sociolinguistic variables of lower levels of exposure to and use of English found within the group. While nonstandard syntactic features show unequal distribution, nonstandard lexical features of semantic reassignment, and mass nouns treated as count nouns display a more uniform intragroup distribution.
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Gottshall Early Reading Intervention: A phonics based approach to enhance the achievement of low performing, rural, first grade boys.

Gottshall Early Reading Intervention: A phonics based approach to enhance the achievement of low performing, rural, first grade boys.

Date: December 2007
Creator: Gottshall, Dorothy Lee
Description: Learning to read is critical for quality of life and success in our society. Children who cannot read well face unsuccessful educational careers and limited job choices. Recently, policy makers and educators have made progress toward increasing the reading achievement of America's children. Still up to 60% of boys who live in poverty cannot read or read two years below grade level. In this experimental study, I designed and examined the effects of the Gottshall Early Reading Intervention (GERI) to determine if direct instruction with a small group, phonics based approach would increase the literacy achievement of low performing, rural, first grade boys. Participants were selected according to Texas Primary Reading Inventory (TPRI) scores, matched them across race, ethnicity, and socio-economic status, and randomly assigned them to experimental/control group. Three times per week for 15 weeks, boys in the experimental group attended 30-minute pullout sessions taught by trained professionals in addition to classroom reading instruction. Control group members received classroom reading instruction only. Findings reveal no significant differences in reading gains across all variables. However, descriptive data indicate higher percentages of gains for the experimental group on four out of five reading components with rate of gain higher on fifth. ...
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The evaluation of Project SCORE: A life skills program for an inner city high school.

The evaluation of Project SCORE: A life skills program for an inner city high school.

Date: December 2007
Creator: Jones, Gretchen M.
Description: Project SCORE: Life Skills for Future Success, is a structured, 20-lesson curriculum, designed to help students develop academic and life skills, as well as self-responsibility, commitment, optimism, respect, and excellence. The curriculum was presented during 36, 90-minute class periods over the fall semester of the students' freshmen year. The purpose of this study was to determine the effectiveness of Project SCORE at improving grades, learning strategies, self esteem and coping skills with freshmen students at an inner-city high school. In order to evaluate the program, students completed paper-pencil surveys at the beginning and end of the semester in which they were enrolled in the Project SCORE class. In addition, teachers completed evaluations on their perceptions of each student's peer relationships, classroom behavior, mood, and activity level. All teachers and students involved in the course were asked to complete an evaluation to determine their level of satisfaction with the course and areas in need of improvement. Lastly, information pertaining to grades, discipline and standardized test scores were used to determine the impact of SCORE. Participants were 333 9th grade students at a large 4A high school in Texas. Findings suggest that SCORE had a positive effect on coping resources, study skills ...
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Geology as a Georegional Influence on Quercus Fagaceae Distribution in Denton and Coke Counties of Central and North Central Texas and Choctaw County of Southeastern Oklahoma, Using GIS as an Analytical Tool.

Geology as a Georegional Influence on Quercus Fagaceae Distribution in Denton and Coke Counties of Central and North Central Texas and Choctaw County of Southeastern Oklahoma, Using GIS as an Analytical Tool.

Date: December 2007
Creator: Maxey, George F.
Description: This study elucidates the underlying relationships for the distribution of oak landcover on bedrock and soil orders in two counties in Texas and one in Oklahoma. ESRI's ArcGis and ArcMap was used to create surface maps for Denton and Coke Counties, Texas and Choctaw County, Oklahoma. Attribute tables generated in GIS were exported into a spreadsheet software program and frequency tables were created for every formation and soil order in the tri-county research area. The results were both a visual and numeric distribution of oaks in the transition area between the eastern hardwood forests and the Great Plains. Oak distributions are changing on this transition area of the South Central Plains. The sandy Woodbine and Antlers formations traditionally associated with the largest oak distribution are carrying oak coverage of approximately 31-32% in Choctaw and Denton Counties. The calcareous Blackland and Grand Prairies are traditionally associated with treeless grasslands, but are now carrying oak and other tree landcover up to 18.9%. Human intervention, including the establishment of artificial, political and social boundaries, urbanization, farming and fire control have altered the natural distribution of oaks and other landcover of this unique georegion.
Contributing Partner: UNT Libraries
The role of prostaglandins, nitric oxide and oxygen in the ductus arteriosi of the pre-term chicken embryo (Gallus domesticus).

The role of prostaglandins, nitric oxide and oxygen in the ductus arteriosi of the pre-term chicken embryo (Gallus domesticus).

Date: December 2007
Creator: Greyner, Henry José
Description: The chicken ductus arteriosi (DA) are two embryonic blood vessels that shunt blood away from the non-ventilated lungs and towards the body and chorioallantoic membrane. I show that prostaglandins have a diminished role in maintaining chicken DA patency and nitric oxide inhibits oxygen induced contraction of the day 19 proximal DA in a time dependent manner. The pathways governing oxygen induced contraction in the chicken DA are similar to those found in mammals and include contributions from ROS, Kv channels, L-type Ca2+ channels, and the Rho kinase pathway. Longer exposure to high oxygen generates increased oxygen induced constriction of the day 19 DA that may be mediated through the Rho kinase pathway.
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An experimental analysis of opportunity and communication response form in a child with autism and hearing impairments.

An experimental analysis of opportunity and communication response form in a child with autism and hearing impairments.

Date: December 2007
Creator: Dempsey, Donna Jean
Description: An alternating treatment design was used to systematically evaluate the communication response forms, picture exchange communication system (PECS) or sign language, selection for a child with pervasive developmental disorder-not otherwise specified, profound hearing loss, and cochlear implants. The child had a limited pool of high preference items and very few functional skills. Key factors for this child included a structured environment that created a verbal community and contingent access to high preference items. No preference in communication response form was observed. The child successfully used four response forms to communicate: gestures, PECS, sign language, and vocalization. The results are discussed in terms of decision making factors in the selection of response forms.
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Improving learner reaction, learning score, and knowledge retention through the chunking process in corporate training.

Improving learner reaction, learning score, and knowledge retention through the chunking process in corporate training.

Date: December 2007
Creator: Murphy, Maureen
Description: The purpose of the study was to investigate the application of the chunking process to the design and delivery of workforce training. Students in a 1-hour course (N = 110) were measured on learner reaction, learning score achievement, and knowledge retention to see whether or not chunking training in a 1-hour session into three 20-minute sessions to match adult attention span resulted in a statistically significant difference from training for 1-hour without chunking. The study utilized a repeated measures design, in which the same individuals in both the control group and experimental group took a reaction survey instrument, a posttest after the training, and again 30 days later. Independent samples t tests were used to compare the mean performance scores of the treatment group versus the control group for both sessions. Cohen's d was also computed to determine effect size. All hypotheses found a statistically significant difference between the experimental and control group.
Contributing Partner: UNT Libraries