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Kinetic Studies of the Reactions of Cl and Br with Silane and Trimethylsilane

Description: The temperature dependence of the reactions of halogen atoms Cl and Br with SiH4 and (CH3)3SiH have been investigated with the flash photolysis-resonance fluorescence technique. CCI4 and CH2Br2 were used as precursors to produce Cl and Br atoms, respectively. Experiments gave {k(Cl + SiH4) (295 - 472 K)} = (1.56 +0.11) x 10-1 exp[(2.0 + 0.2) kJ mol'/RT] cm3 s4, {k(Br + SiH4)(295 - 575 K)} = (9.0 + 1.5) x 10-" exp[-(17.0 + 0.6) Id mol'/RT] cm3 s', {k(Cl + (CH3)3SiH)(295 - 468 K)} = (1.24 0.35) x 104 exp[(1.3 + 0.8) Id mol4/RT] cm3 s', and {k(Br + (CH3)3SiH)(295 - 456 K)} = (7.6 + 3.3) x 1010 exp[-(28.4 + 1.3) Id mol'/RT] cm3 s'. The results were compared with values from earlier work.
Date: May 1992
Creator: Ding, Luying
Partner: UNT Libraries

Roads for Texas: Creation of a State Highway Department

Description: The work traces the early history of the Texas State Department of Highways. Beginning with the first efforts to create a department, the study focuses on the period between 1917 and 1923. Much attention goes to the legislative background of the early actions of the department. Subsequently, the work examines various statistical measures of the department's performance. This includes comparisons between Texas and nearby states, and the national highs, lows, and averages. Concluding the study is an examination of the department's immediate goals and long range plans in the years after 1923. The general conclusion of the study is that the department played a useful role in the development of state roads in Texas.
Date: May 1992
Creator: Cruse, Stephen Douglas
Partner: UNT Libraries

Mark Di Suvero's Sculpture: From the Found-Object Sculpture of the Nineteen Sixties to the Monumental Sculpture of the Nineteen Eighties, A Study in Continuity

Description: This thesis analyzes technical and stylistic aspects of Mark di Suvero's nineteen sixties found-object works, and his monumental I-beam sculptures of the nineteen seventies and eighties to demonstrate their consistency despite the apparent contrasts in form, materials, and process. Primary data, sculpture of Mark di Suvero. Secondary data obtained from major art periodicals, newspapers, and exhibition catalogs. The artist was interviewed by author at the retrospective exhibition in Nice, France, Septermber, 17, 1991. Examination of primary and secondary data reveals a strong continuity by the artist in his approach to his work despite obvious external changes in materials and process.
Date: December 1992
Creator: Pinkney, Valerie J.
Partner: UNT Libraries

The Torus Does Not Have a Hyperbolic Structure

Description: Several basic topics from Algebraic Topology, including fundamental group and universal covering space are shown. The hyperbolic plane is defined, including its metric and show what the "straight" lines are in the plane and what the isometries are on the plane. A hyperbolic surface is defined, and shows that the two hole torus is a hyperbolic surface, the hyperbolic plane is a universal cover for any hyperbolic surface, and the quotient space of the universal cover of a surface to the group of automorphisms on the covering space is equivalent to the original surface.
Date: August 1992
Creator: Butler, Joe R.
Partner: UNT Libraries

Educating Special Needs Students: Gifted and Honors Programs at the Senior High School Level

Description: This research sought to discover whether minority and economically disadvantaged students are underrepresented in gifted and honors programs. Another goal was to ascertain attitudes of students and teachers currently participating in gifted and honors programs regarding: admission criteria; adequacy of teacher preparation to meet special needs of gifted and honors students; levels of needs satisfaction of gifted and honors students; perceptions of students and teachers about program modification.
Date: August 1992
Creator: Campbell, Sheri Y. (Sheri Yuvonne)
Partner: UNT Libraries

The Subjective Economy and Political Support: The Case of the British Labour Party

Description: During the past two decades, extensive research efforts have focused on the conventional wisdom that the economy has a direct influence on a party's destiny. This hypothesis rests on the implicit assumption that the linkages between macroeconomic variables such as inflation and unemployment and party support are direct and unmediated. As the present study indicates, however, objective economic measures only serve as a proxy for the invisible force that drives voters' party support. Once the relevant variables, namely, the perceptual factors of the electorate, are controlled for, variables that describe the state of the objective economy fail to exert their "magic" on political behavior.
Date: December 1992
Creator: Ho, Karl Ka-yiu
Partner: UNT Libraries

The Reflection

Description: The Reflection is a piece of chamber music that describes the human nature through the use of different "meanings" in music. By using various leitmotifs and different compositional techniques, the music becomes a helpful tool to reflect meanings. On the other hand, this piece uses one special idea, which is that the whole piece can be explained in terms of visual arts. Each primary motive represents a "primary color" that reflects various "moods" or "emotions." Through using combinations and mixtures of color, different "sceneries" are formed. Furthermore, The Reflection has three basic aspects: the function of transmitting messages through music; the exploration of different functions of fifth; and the emphasis of meaning, sound effect and timbre.
Date: December 1992
Creator: Wu, Yuk Yee
Partner: UNT Libraries

Changes in Heterozygosity Through Time in American Standardbred and American Saddlebred Horses (1960-1990)

Description: Observed and expected heterozygosity (H) levels for ten electrophoretic blood marker loci and expected H for seven red blood cell (RBC) anitgen/antibody loci were examined for 20 years in American Standardbred and 30 years in American Saddlebred horses. Standardbreds were classed by gait, Trotter and Pacer, and evaluated separately in most analyses. 4,404 Trotters and 12,271 Pacers were found to have statistically highly significant losses of mean total observed H through time for the ten electrophoretic loci (P<0.005), although in Trotters the loss was more extreme (P<<0.001). Loss of H in 5984 Saddlebreds was not significant (P=0.259). Correlations of RBC expected H through time showed decreases in all three groups.
Date: May 1992
Creator: King, Judith A. (Judith Ann), 1955-
Partner: UNT Libraries

On Viewing Press Releases of the Texas State AFL-CIO as Rhetorical Genre

Description: Previous scholarship on labor rhetoric has concentrated on the impact of declining union membership and contemporary activist strategies on the part of unions. The press release is a common form of communication that organized labor employs in order to reach its publics. This study explores the press releases of the Texas State AFL-CIO to determine to what extent this level of labor discourse meets the criteria of a rhetorical genre. This study employs the methodology for generic criticism laid out by Foss for identifying genres. The study concludes that a genre of labor rhetoric exists and that the genre was used extensively to promote the Texas State AFL-CIO as a socially-conscious and politically motivated organization.
Date: May 1992
Creator: Welborn, Ronny D.
Partner: UNT Libraries

Vocal Pitch-Matching: The Effect of Singing into the Right Ears of Fifth-Grade Students

Description: This study investigated whether fifth-grade students would sing more accurately when responding to pitch stimuli presented to the right ear as compared to left and both ears. Students were also classified as either strongly right-handed or other (left-handed or mixed) to see if ear treatment responses would differ with handedness. Sixty-six students were tested on their attempts to match 12 model pitches. Identical tests were given to each subject on 3 different days, with a different ear treatment each day. Vocal response scores were significantly better for both-ear presentation than for left-ear. No significant difference was found between right and both ears, right and left ears, or between handedness groups.
Date: August 1992
Creator: Watkins, Sharon C. (Sharon Carp)
Partner: UNT Libraries

The Metal-Organic Chemical Vapor Deposition of Cu(II)-bishexafluoroacetylacetonate on a Tungsten Substrate

Description: Evidence is reported for the formation of carbon-containing contamination products at the copper-tungsten (Cu-W) interface during the metal organic chemical vapor deposition (MOCVD) of copper on tungsten. Cu(II)bishexafluoroacetylacetonate [Cu(hfac)_2] was physisorbed onto lightly oxidized tungsten (WO_x) at 115K, under ultra-high vacuum conditions, and then annealed sequentially to higher temperatures. Copper reduction was observed by 320K. Carbonaceous and carbidic contamination of the WO_x surface was observed, even after sample warming to 625K in UHV. The results indicate that low temperature MOCVD of Cu may be possible, but interfacial contamination from the organic ligand fragmentation is a major concern.
Date: May 1992
Creator: Welton, Theresa E. (Theresa Eilene)
Partner: UNT Libraries

Modulation of ³H-Myo-Inositol Uptake by Glucose and Sorbitol in Cultured Bovine Lens Epithelial Cells

Description: Myo-[3H]-inositol accumulation in cultured bovine lens epithelial cells (BLECs) occurred by both high- and low affinity, Nat-dependent transport sites. High ambient glucose significantly inhibited myo-[ 3 H]-inositol uptake; the co-administration of sorbinil, an aldose reductase inhibitor, prevented the inhibitory effect on the low affinity transport site. A glucose-sensitive process for myo-[3 H]-inositol uptake on the high-affinity transport site was uncovered by Lineweaver-Burk analysis. Dixon plot analysis confirmed that the effect of glucose was due to competitive inhibition of the high-affinity myo-inositol transport site while the effect of sorbitol was due to competitive inhibition of the low-affinity myo-inositol transport site.
Date: August 1992
Creator: Chen, Hai-Qing
Partner: UNT Libraries

Assessing the Object Relations of Sexually Abused Females

Description: The TAT stories of 38 sexually abused females between the ages of 5 and 18 years and a clinical group of 26 females with no recorded history of abuse were analyzed using the Object Relations and Social Cognitions TAT Scoring System (Westen et al., 1985). Subjects in the sexual abuse group showed significantly lower mean scores on a scale measuring affect-tone of relationship paradigms and on a scale measuring complexity of representations of people. In addition, pathological responses were given significantly more often by sexual abuse victims on the complexity of representations of people scale. Thus, sexually abused children showed more primitive and simple characterizations of people and more negative, punitive affect in their representations. Moreover, these results were independent of age, race, and intelligence. Group differences are discussed in terms of object relations development.
Date: August 1992
Creator: Freedenfeld, Robert N.
Partner: UNT Libraries

Structural Analysis of the Genes Encoding the Oxalocrotonate Branch of the Pseudomonas putida TOL Plasmid pDKI meta-cleavage Pathway and the Expression of the xy1G Gene Product in Escherichia coli

Description: Three overlapping DNA fragments from the lower operon of Pseudomonas putida TOL plasmid pDK1, covering the xy1IH genes and downstream flanking region, were cloned into pUC19. They include a 2.8 kbp XhoI fragment, a 2.7 kbp PstI fragment and a 2.0 kbp EcoRI-HindIII fragment. They were subjected to DNA sequence analysis. The xy1I (4-oxalocrotonate decarboxylase) and xy1H (4-oxalocrotonate tautomerase) genes were found to possess coding regions of 792 and 189 nucleotides, respectively. A possible transcriptional terminator resembling E. coli rho-independent terminators was identified downstream of the translational stop of xy1H. An additional stem and loop structure was found in the intergenic region between xy1I and xy1H. The individual ORF's of the oxalocrotonate branch (xy1G, xy1I and xy1H) have been cloned into pUC18/19. The expression of the xy1G gene in E. coli was successfully assayed spectrophotometrically.
Date: December 1992
Creator: Luo, Xuebin
Partner: UNT Libraries

Sexual Behavior Among Secondary School Going Adolescent Women in Zambia

Description: Adolescent fertility is a problem that is urgent in developing countries due to rapid population growth rates. To gain a better understanding of adolescent fertility within developing countries a study was undertaken to examine adolescent sexual behavior among teens within a developing country, Zambia. A self-administered questionnaire was given to secondary school going teenage women in Zambia. The sample population consisted of 503 women between the ages of 12 and 19. The survey was analyzed using both regression and univariate analysis of the data. The findings revealed that a high percentage of the teens have initiated sexual activity; yet few (4.2%) have ever used modern contraceptive methods. Suggestions were made for family planning programs that would involve both parents and their children.
Date: August 1992
Creator: Palka, Karen
Partner: UNT Libraries

Homologous Recombination in Q-Beta Rna Bacteriophage

Description: Q-Beta phage RNAs with inactivating insertion (8 base) or deletion (17 base) mutations within their replicase genes were transfected into Escherichia coli spheroplasts containing QB replicase provided in trans by a resident plasmid. Replicase-defective (Rep~) Q3 phage produced by these spheroplasts were unable to form plaques on cells lacking this plasmid. When individual Rep~ phage were isolated and grown to high titer in cells containing plasmid derived Q3 replicase, revertant Q3 phage (Rep'), with the original mutation (insertion or deletion) repaired, were obtained at a frequency of ca. 1 x 108. RNA recombination via a "template switching" mechanism involving Q3 replicase, the mutant phage genome, and the plasmid-derived replicase mRNA was shown to be the primary means by which these mutant phages reverted to wild type.
Date: May 1992
Creator: Palasingam, Kampan
Partner: UNT Libraries

The Eulerian Functions of Cyclic Groups, Dihedral Groups, and P-Groups

Description: In 1935, Philip Hall developed a formula for finding the number of ways of generating the group of symmetries of the icosahedron from a given number of its elements. In doing so, he defined a generalized Eulerian function. This thesis uses Hall's generalized Eulerian function to calculate generalized Eulerian functions for specific groups, namely: cyclic groups, dihedral groups, and p- groups.
Date: August 1992
Creator: Sewell, Cynthia M. (Cynthia Marie)
Partner: UNT Libraries

Predictors of Health Care and Social Service Utilization and Perceived Need Among the Disabled Elderly in Canada

Description: The world has experienced a tremendous growth in its elderly population. With the aging of the population, policy makers are concerned about the health of these elderly as well as their utilization of health care and social services and perceived need for additional services. The Canadian elderly population is similar to other elderly populations in that a few tend to be the heaviest users of the available services. The predictors of this utilization behavior and perceived need primarily include need variables, such as the number of limitations of daily living -- both ADLs and IADLs, and functional limitations. In addition, enabling variables, such as income, work activity and geographic region of residence were also found to be significant.
Date: August 1992
Creator: Dietz, Tracy L.
Partner: UNT Libraries

Bearclaw: a Novel

Description: Written in the tradition of American political suspense thrillers such as "Fail-Safe" and "Seven Days In May," "Bearclaw" uses their idealistic and nationalistic elements to tell a story of an American President eager to lead the world's peoples in a quest to achieve man's "highest destiny," the conquest of space. Believing that this common goal will cause mankind to come together in a spirit of brotherhood, he misreads the historical purpose of the United States and, in the end, refuses to recognize the obvious truths of human frailty and ambition even though he has been victimized by them. The Introduction is a brief survey of the sociopolitical and literary forces which combined to create the American political suspense thriller and an attempt to define its place in the literary canon.
Date: May 1992
Creator: Elston, James C. (James Cary)
Partner: UNT Libraries

The Function-Altering Effects of Contingency-Specifying Stimuli

Description: Three children between the ages of 3 and 3 1/2 were asked to choose a colored object from an array of 5 colors in a baseline condition. After color preferences were established, stickers, small toys and praise were made contingent on choosing the least preferred color. After the first experimental condition resulted in consistent choosing of the least preferred color, a second experimental condition was implemented. At the beginning of each session a contingency-specifying stimulus (CSS) was presented, each CSS specifying a different color to be selected. Both contingency-shaping and CSS presentation resulted in stimulus control over responding. However, CSS presentation resulted in immediate redistributions of behavioral units across CSS sessions.
Date: August 1992
Creator: Ford, Victoria L.
Partner: UNT Libraries

Rorschach Assessment of Object Relations Development in Sexually Abused Children

Description: Sexual abuse of children has profound negative effects on psychological development. This study examined the effects of sexual abuse on object relations functioning by using the Mutuality of Autonomy Scale (MAS, Urist, 1977) to score Rorschach protocols of 63 abused children and 60 non-abused clinical controls. The hypothesis that abused children would have less developed object relations than their non-abused counterparts was not supported. Neither was the hypothesis that children who experienced greater severity of sexual abuse would exhibit more malevolent object relations. The hypothesis that mean and modal MAS scores would be highly intercorrelated and interchangeable as research variables was supported. Comparisons of this sample to a normative sample are discussed.
Date: December 1992
Creator: Isler, Diane E. (Diane Evelyn)
Partner: UNT Libraries

Abraham Lincoln and the American Romantic Writers: Embodiment and Perpetuation of an Ideal

Description: The American Romantic writers laid a broad foundation for the historic and heroic Abraham Lincoln who has evolved as our national myth. The writers were attracted to Lincoln by his eloquent expression of the body of ideals and beliefs they shared with him, especially the ideal of individual liberty and the belief that achievement of the ideal would bring about an amelioration of the human condition. The time, place and conditions in which they lived enhanced the attraction, and Lincoln's able leadership during the Civil War strengthened their estimation of him. His martyrdom was the catalyst which enabled the Romantic writers to lay the foundation of the Lincoln myth which has made his name synonymous with individual freedom everywhere even today.
Date: December 1992
Creator: Hicks, Mary G. (Mary Geraldine)
Partner: UNT Libraries

The Relationship Between Childhood Sexual Abuse and Eating Disorder Development in College Females

Description: The incidence of both childhood sexual abuse and eating disorders is rising. A study of 422 undergraduate college females was undertaken using self report format to determine the incidence of childhood sexual abuse and eating disorders in a college population, and to determine the relationship between the two. In all, 57% of the women surveyed reported experiencing some form of sexual contact before the age of 14. Using the EDI-2 to assess risk of eating disorder development, 42% of these formerly abused women were found to be at risk for the development of an eating disorder. This was not found to be statistically different from the risk of eating disorder development experienced by the nonabused females in this population. However, there were differences found on the dimensions of Interpersonal Distrust, Interoceptive Awareness and Ineffectiveness, indicating that two of the major issues in eating disorder development for the abused women are trust both of themselves and of others, and self-esteem.
Date: May 1992
Creator: James, Mary G., 1952-
Partner: UNT Libraries

The Effects of Different Percentages of Incentive Pay to Base Pay on Work Productivity

Description: This experiment investigated how different percentages of incentive pay affected performance on a number-entering task. It was hypothesized that the critical factor in incentive pay systems was the absolute amount of money that could be earned in an incentive pay paradigm. A counterbalanced single-subject reversal design was employed to examine effects of incentives on performance. Twelve subjects were used in the experiment with three subjects assigned to one of four experimental paradigms. Two of the experimental paradigms incorporated 10% and 100% incentive pay conditions, while the other two experimental paradigms incorporated absolute pay conditions equal to the 10% and 100% incentive pay conditions. Results indicated that similar trends in productivity occurred across subjects in all four experimental paradigms.
Date: December 1992
Creator: Gruenberg, Joel S. (Joel Sanborn)
Partner: UNT Libraries