UNT Theses and Dissertations - 269 Matching Results

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N-Acylethanolamines and Plant Phospholipase D
Recently, three distinct isoforms of phospholipase D (PLD) were identified in Arabidopsis thaliana. PLD α represents the well-known form found in plants, while PLD β and γ have been only recently discovered (Pappan et al., 1997b; Qin et al., 1997). These isoforms differ in substrate selectivity and cofactors required for activity. Here, I report that PLD β and γ isoforms were active toward N-acylphosphatidylethanolamine (NAPE), but PLD α was not. The ability of PLD β and γ to hydrolyze NAPE marks a key difference from PLD α. N-acylethanolamines (NAE), the hydrolytic products of NAPE by PLD β and γ, inhibited PLD α from castor bean and cabbage. Inhibition of PLD α by NAE was dose-dependent and inversely proportional to acyl chain length and degree of unsaturation. Enzyme kinetic analysis suggested non-competitive inhibition of PLD α by NAE 14:0. In addition, a 1.2-kb tobacco (Nicotiana tabacum L.) cDNA fragment was isolated that possessed a 74% amino acid identity to Arabidopsis PLD β indicating that this isoform is expressed in tobacco cells. Collectively, these results provide evidence for NAE producing PLD activities and suggest a possible regulatory role for NAE with respect to PLD α.
Adlerian Personality Priorities of Siblings of Individuals with Tourette Syndrome
This study was designed to examine Adlerian personality priorities of siblings of individuals with Tourette Syndrome (TS). This study aimed to investigate whether a difference exists between TS siblings and siblings of those without disabilities on variables related to personality priorities. It was hypothesized that TS siblings would score significantly higher than the control group on the superiority and pleasing personality priorities and significantly lower on the comfort and control personality priorities. Both of the hypotheses were rejected. First, no significant difference was found between TS siblings and the control group on the superiority and pleasing personality priorities. Second, no significant difference was found between TS siblings and the control group on the comfort personality priority, and TS siblings scored significantly higher than the control group on the control personality priority.
Adult Attention Deficit Hyperactivity Disorder Personality Characteristics and Comorbidity
Attention-deficit/hyperactivity disorder (ADHD) is surrounded by confusion and controversy regarding its definition, course, etiology and treatment. Among adults, ADHD is rarely considered a diagnostic reality of primary importance and is often overlooked. This study provides descriptive validity for adult ADHD in distinguishing it from controls, and identifying both a pure condition and one wrought with comorbidity.
An Adult Educational Research Model for Developing an Evaluation System for Clergy
Formal job performance evaluation of a church's pastoral staff has been almost nonexistent in many churches. While business and education have been making strides in evaluation techniques during the past three decades, the church is just beginning to notice the need for this kind of accountability and ongoing professional development. In this research, the author applied the evaluation techniques of education to church pastoral staff members. Evaluation can be understood as both a formative process and a summative decision. The steps to planning an evaluation that will be both formative and summative are discussed. Qualifying the ministerial tasks through objective job descriptions will enable the church to quantify the job performance through evaluation. Suggestions are given for developing a ministerial evaluation instrument. In this research a model from educational evaluation was adapted for use in a local church setting. One denomination was selected to demonstrate the process of evaluation development. Denominational governments differ considerably. Therefore, the key stakeholders of the church for the chosen denomination were identified as pastors and church board members. These stakeholders were used as a "panel of experts." The Delphi technique was used to develop consensus from the participants concerning (1) the core skills of ministerial effectiveness and (2) the quality indicators to measure those core skills. This required two rounds, one for identifying the core skills and one for identifying quality indicators. Each round consisted of three surveys. The research identified seven core skills for ministerial effectiveness and a number of quality indicators to measure each core skill. The results were used to demonstrate how an evaluation tool could be developed from the data. This evaluation tool was the consensus of the panel of experts in this study. While the process is a model that could be similar for any church's "panel" of participants, the ...
Advanced Molecular and Microbial Techniques: a Complete Laboratory Notebook
The purpose of this project is to produce a complete and thorough notebook that may be used to supplement laboratory coursework. Its intent is to be used primarily by the students to aid them in understanding background information and the proper laboratory procedures involved in various types of experiments. The laboratory notebook is a summation of all the experiments and procedures used in the six-credit hour Advanced Microbial and Molecular Biology (BIOL 5160) course offered during the summer semester at the University of North Texas. This class is a team taught effort by Professors O'Donovan and Kunz. The course is constructed as an intensive practice exercise to teach the student about gene mutations, biosynthetic pathways, preparation and analysis of plasmid DNA, and many other topics included in the notebook.
Advanced techniques in microbial and molecular biology: laboratory procedures for a graduate level course
Advanced laboratory techniques for Microbial and Molecular Biology at the graduate level are presented in this thesis. The procedures for the laboratory experiments are set forth in detail. This laboratory is conducted as two parts, covering staining procedures, mutagenesis experiments, phenotyping strains, conjugative transfer of plasmids, and other topics.
Alcohol Use, Violence, and Psychological Abuse in Intimate Relationships
Women in distressed relationships who had sustained severe psychological abuse and either no, moderate, or severe violence from their partner were included (N = 93). Men's and women's alcohol use did not differ with level of violence. Different patterns were found in the moderate violence group regarding women's beliefs about their partner's substance problem, men's psychological abuse, and the relationship of men's and women's quantity of alcohol use and times intoxicated. Uncertainty resulting from moderate violence may strengthen the emotional impact of psychological abuse. Even when psychological abuse is exacerbated by violence, women may use active coping techniques rather than drinking to cope with abusive relationships. The findings suggest that an inordinate focus on alcohol abuse may be ineffective in combating the problem of domestic violence.
American Indian Music in Elementary School Music Programs of Oklahoma : Repertoire, Authenticity and Instruction
The purpose of this study was to determine the instructional methods of Oklahoma's elementary school music educators with respect to the inclusion of an authentic repertoire of American Indian music in the curriculum. The research was conducted through two methods. First, an analysis and review of adopted textbook series and pertinent supplemental resources on American Indian music was made. Second, a survey of K-6 grade elementary music specialists in Oklahoma during the 1997-1998 school year was conducted.
American Literary Pragmatism : Lighting Out for the Territory
This thesis discusses pragmatist philosophy in the nineteenth century and its effect on American literature of the time.
Analyses of Particulate Contaminants in Semiconductor Processing Fluids
Particle contamination control is a critical issue for the semiconductor industry. In the near future, this industry will be concerned with the chemical identities of contaminant particles as small as 0.01 pm in size. Therefore, analytical techniques with both high chemical sensitivity and spatial resolution are required. Transmission electron microscopy (TEM) provides excellent spatial resolution and yields structural and compositional information. It is rarely used, however, due to the difficulty of sample preparation. The goals of this research are to promote the use of TEM as an ultrafine particle analysis tool by developing new sample preparation methods, and to exploit the new TEM techniques for analysis of particles in semiconductor processing fluids. A TEM methodology for the analysis of particulate contaminants in fluids with an elemental detectability limit as low as 0.1 part per trillion (ppt), and a particle concentration detectability limit as low as 1 particle/ml for particles greater than 0.2 pm was developed and successfully applied to the analysis of particles in HF, H202, de-ionized (DI) water, and on the surface of an electronic device. HF samples from three manufacturers were examined. For HF (B), the maximum particle concentration was 8.3 x 103 particles/ml. Both a viscous material and lath-shaped particles were observed. The Sb concentration was less than 0.6 part per billion (ppb). HF (C) was the cleanest. CaF2 and TiO2 particles were identified in HF (D). For H2 02, iron and tin oxides and hydroxides were identified. The maximum particle concentration was 990 particles/ml. The Sn and Fe concentrations were less than 0.3 ppb. Spherical and dendritic particles were observed. For DI water, spherical and dendritic particles (<2 particles/ml), and particles containing Fe or Si with concentrations less than 0.1 ppt were observed. Contaminants on an electronic device surface were also analyzed. Clusters of small particles ...
An Analysis of Basic Design Education in Turkey and Implications for Changes in Postsecondary Art Curriculum
This study explored the current status of Turkish basic art education and the objectives of the first year art program at the university level in Turkey. Also, the researcher attempted to explore the objectives and expectations of Turkish art professors and to examine the applicability of certain concepts of American basic design education in the teaching of studio foundation courses in Turkish art schools. The study included the literature review concerning changes in educational philosophy related to the history of design education in the West and in Turkey.
An Analysis of How Interest Groups Influence the Policy-making Process for the Individuals With Disabilities Education Act of 1997
This study examined the policy letters and verbal testimony transcripts submitted by interest groups to the United States Department of Education (USDE) in response to the proposed regulations pertaining to the implementation of the 1997 reauthorization of P. L. 105-17, Individuals with Disabilities Education Act (IDEA). Specifically, this study analyzed the emerging themes in the area of discipline. Responses were received from the following interest groups: (a) school administrators, (b) parents, (c) teachers, (d) state educational agencies (SEAs), (e) national educational organizations, and (f) members of the United States Congress. In addition to analyzing the emerging themes, the study compared these themes to ones found in the current literature and court cases.
Analysis of Phytoplankton Responses to Water Chemistry Dynamics in a Moderately Eutrophic North Texas Reservoir
Canonical correspondence analysis (CCA) was used to explore relationships between measured environmental variables and in situ phytoplankton communities in a moderately eutrophic North Texas Reservoir.
An Analysis of the Performance of a Clinical Sample of African American, Caucasian, and Hispanic Children on the WISC-III
The goals of revision for the Wechsler Intelligence Scale for Children-Third Edition included enhancement of the factor structure, improvement of subtests, and revision of norms. The researchers reported that the very few items that were found to be biased were replaced. The WISC-III performance of a clinical sample of African American, Caucasian, and Hispanic children was analyzed to determine if the test bias was eliminated as claimed in the goals of the revision.
Analysis of the Trypanosoma brucei Genome and Identification and Characterization of a Gene Family Encoding Putative EF-Hand Calcium-Binding Proteins
The flagellum of Trypanosoma brucei contains a family of antigenically related EF-hand calcium-binding proteins which are called the calflagins. Genomic Southern blots indicated that multiple copies of calflagin genes occur in T brucei. All of the copies were contained in a single 23 kb Xhol-Xhol fragment. Genomic fragments of 2.5 and 1.7 kb were cloned that encoded calflagin sequences. Two new members of the calflagin family were found from genomic clone sequences. The deduced amino acid sequences of the genomic clones showed the calflagin genes were arranged tandemly along the genomic fragments and were similar to previously described calflagins. The calflagin genes were related by two unrelated 3' flanking sequences. An open reading frame that was unrelated to any calflagin was found at the 5' end of the 2.5 kb genomic fragment. Each encoded protein (~24,000u) contained three EF-hand calcium-binding motifs and one degenerate EF-hand motif. In general, variability among the T. brucei calflagins is greater than related proteins in T. lewisii and T. cruzi. This variability results from amino acid substitutions at the amino and carboxy termini, and duplication of internal segments.
Analysis of Thermoplastic Polyimide + Polymer Liquid Crystal Blends
Thermoplastic polyimides (TPIs) exhibit high glass transition temperatures (Tgs), which make them useful in high performance applications. Amorphous and semicrystalline TPIs show sub-Tg relaxations, which can aid in improving strength characteristics through energy absorption. The a relaxation of both types of TPIs indicates a cooperative nature. The semicrystalline TPI shows thermo-irreversible cold crystallization phenomenon. The polymer liquid crystal (PLC) used in the blends is thermotropic and with longitudinal molecular structure. The small heat capacity change (ACP) associated with the glass transition indicates the PLC to be rigid rod in nature. The PLC shows a small endotherm associated with the melting. The addition of PLC to the semicrystalline TPI does not significantly affect the Tg or the melting point (Tm). The cold crystallization temperature (Tc) increases with the addition of the PLC, indicating channeling phenomenon. The addition of PLC also causes a negative deviation of the ACP, which is another evidence for channeling. The TPI, PLC and their blends show high thermal stability. The semicrystalline TPI absorbs moisture; this effect decreases with the addition of the PLC. The absorbed moisture does not show any effect on the degradation. The addition of PLC beyond 30 wt.% does not result in an improvement of properties. The amorphous TPI + PLC blends also show the negative deviation of ACP from linearity with composition. The addition of PLC causes a decrease in the thermal conductivity in the transverse direction to the PLC orientation. The thermomechanical analysis indicates isotropic expansivity for the amorphous TPI and a small anisotropy for the semicrystalline TPI. The PLC shows large anisotropy in expansivity. Even 5 wt. % concentration of PLC in the blend induces considerable anisotropy in the expansivity. Thus, blends show controllable expansivity through PLC concentration. Amorphous TPI + PLC blends also show excellent film formability. The amorphous TPI ...
Anyone Lived in a Pretty How Hell: the Rhetoric of Universality in Bessie Head
This dissertation approaches the work of South African/Botswanan novelist Bessie Head, especially the novel A Question of Power, as positioned within the critical framework of the postcolonial paradigm, the genius of which accommodates both African and African American literature without recourse to racial essentialism. A central problematic of postcolonial literary criticism is the ideological stance postcolonial authors adopt with respect to the ideology of the metropolis, whether on the one hand the stances they adopt are collusive, or on the other oppositional. A key contested concept is that of universality, which has been widely regarded as a witting or unwitting tool of the metropolis, having the effect of denigrating the colonial subject. It is my thesis that Bessie Head, neither entirely collusive nor oppositional, advocates an Africanist universality that paradoxically eliminates the bias implicit in metropolitan universality.
The Apostasy (and Return) of Lenny Gorsuch
This comic romantic novel engages the question of how the Christianity of the southern, fundamentalist world of the Texas bible belt, finding its primary cultural assumptions about human existence challenged by the more confusing elements of a modern sensibility, a sensibility over-laden with strange-attractors, mechanistic psychologies, relativistic physics and ethics, evolutionary premises, newly proclaimed rights and freedoms, a deterioration in cultural political naivete, and the advent of an increasingly incomprehensible set of technologies, can survive. The "central" character is a young, slightly deformed man raised by his ostensibly "Christian" grandparents who, through a rather odd set of legal circumstances and physical events, not only become wealthy, but somewhat powerful in their immediate community. He finds himself involved with a young woman, raised in an equally "Christian" household, but, as is true of any romantic plot, the relationship between the two is destined, by virtue of circumstance and the meddling of other characters, to struggle and mishap. In the end, the text, in its own fashion, asserts that the Christian impulse can survive the modern era by virtue of one of its central tenets: faith, in the Christian world, is very much the same as life itself, a process of waiting and expecting. Its greatest threat, rather than something intrinsic to the modern period, is perhaps that of the dogmatism and misunderstanding of the characters who most loudly proclaim it to others.
Assessing the feasibility of developing a DBAE curriculum in Qatar utilizing multimedia technology
The purpose of this study was to demonstrate the feasibility of developing an art curriculum in Qatar, using the principles of the DBAE curriculum in conjunction with technology. Many of the challenges facing art educators and the art curriculum in Qatar can be approached through the multimedia applications of DBAE, which will provide instructors and students with an opportunity to more readily interact with visual art and to discover its educational relevance. Additionally, this study attempted to discover whether teachers are engaged in implementing technology in the art classroom and whether they are given the opportunity to engage in art to their satisfaction.
Assessment and Treatment of Multiple Topographies and Functions of Self-injury
Results of a functional analysis indicated that the self-injurious behavior (SIB) of an adult female with profound mental retardation occurred primarily in the alone and demand conditions. Graphs of the separate topographies (head slaps and head bangs) showed that head banging occurred in the alone condition and that both head banging and head slapping occurred in the demand condition. A data analysis procedure to identify within-session trends across sessions and fluctuations in rates of SIB by topography revealed that most of the demands escaped were escaped by head slaps and that over 80% of all head slaps were associated with escape, compared to less than 1%of all head bangs, indicating that head banging and head slapping were members of separate functional response classes. Treatment consisted of noncontingent availability of preferred leisure materials, and produced substantial decreases of both head banging and head slapping. Interpretation of the results are discussed, as well as some implications and limitations of the study.
An Assessment of College Students' Attitudes and Empathy toward Rape
The purpose of this study was to assess rape attitudes and empathy levels of students at a university in North Texas. The Attitudes Toward Rape questionnaire and the Rape Empathy Scale were administered to 387 undergraduate students. Dependent variables were attitudes and empathy and independent variables were prior knowledge or experience as a rape victim, having female siblings, gender, marital status, and age. Significance was found between rape-intolerant attitudes and both prior experience as a victim (p < .001), and gender (p < .001). Significance was also found between empathy and experience as a rape victim (p < .035) and gender (p < .032).
Auditor's reporting practices for an entity's ability to continue as a going concern: the impact of SAS no. 59
This study examines whether the probability of a firm receiving a going concern modified report or a standard audit report with note disclose of a going concern uncertainty has increased after the issuance of SAS No. 59. This study also examines whether the probability of a firm having no reference to a going concern uncertainty in its audit report or the financial statement notes has decreased after the issuance of SAS No. 59.
The Awareness and Perception of Distance Education by the Leadership in the Texas State Technical College System
The purpose of this study was to determine whether there were differences in the levels of awareness and perception concerning distance education among the leadership at the seven campuses of the Texas State Technical College (TSTC) System.
Behavior Management Techniques Used by Teachers of Emotionally/behaviorally Disordered Students in Various Educational Settings
The purpose of this study was to delineate the differences between the types of behavioral management techniques used by teachers of students with emotional/behavioral disorders.
A Behavioral Model for Detection of Acute Stress in Bivalves
A behavioral model for acute responses in bivalves, was developed using time series analysis for use in a real-time biomonitoring unit. Stressed bivalves closed their shell and waited for the stressful conditions to pass. Baseline data showed that group behavior of fifteen bivalves was periodic, however, individuals behaved independently. Group behavior did not change over a period of 20 minutes more than 30 percent, however, following toxic exposures the group behavior changed by more than 30 percent within 20 minutes. Behavior was mathematically modeled using autoregression to compare current and past behavior. A logical alarm applied to the behavior model determined when organisms were stressed. The ability to disseminate data collected in real time via the Internet was demonstrated.
"The Best Stuff Which the State Affords": a Portrait of the Fourteenth Texas Infantry in the Civil War
This study examines the social and economic characteristics of the men who joined the Confederate Fourteenth Texas Infantry Regiment during the Civil War and provides a narrative history of the regiment's wartime service. The men of the Fourteenth Infantry enlisted in 1862 and helped to turn back the Federal Red River Campaign in April 1864. In creating a portrait of these men, the author used traditional historical sources (letters, diaries, medical records, secondary narratives) as well as statistical data from the 1860 United States census, military service records, and state tax rolls. The thesis places the heretofore unknown story of the Fourteenth Texas Infantry within the overall body of Civil War historiography.
Biochemical Identification of Molecular Components Required for Cyanide Assimilation in Pseudomonas fluorescens NCIMB 11764
Utilization of cyanide as a nutritional nitrogen source in P. fluorescens NCIMB 11764 was shown to involve a novel metabolic mechanism involving nonenzymatic neutralization outside of cells prior to further enzymatic oxidation within. Several cyanide degrading enzymes were produced by NCIMB 11764 in response to growth or exposure to cyanide, but only one of these cyanide, oxygenase (CNO), was shown to be physiologically required for assimilation of cyanide as a growth substrate.
Biogeographic Relationships of Pocket Gophers (Geomys breviceps and Geomys bursarius) in the Southeastern Portion of Their Ranges
This research utilized population genetic analyses (protein starch-gel electrophoresis and DNA sequencing of the cytochrome b mtDNA gene), host-parasite specificity (lice coevolution), remote sensing of satellite data, and geographic information systems (GIS) to characterize newly discovered populations of pocket gophers (genus: Geomys) in Arkansas. These populations are isolated and occur in seemingly unsuitable habitat in the Ozark Mountains of Arkansas. Analyses of electrophoretic and ectoparasite data suggested the populations in the Ozark Mountains represented isolates allied to Geomys bursarius, a species not known to occur in Arkansas. Comparison of mitochondrial DNA sequence data of the cytochrome b gene with that of other taxa and morphometric analyses confirmed that these populations are most closely allied to G. bursarius occurring to the north in Missouri. Moreover, these mtDNA sequence analyses indicated a degree of differentiation typical of that between other subspecies of pocket gophers. Therefore, these populations represent a distinct genetic entity in an intermediate stage of speciation and should be designated as a new subspecies, Geomys bursarius ozarkensis. Molecular clock analysis revealed a time of lineage divergence for this new subspecies as approximately 511,000 YBP. Due to the isolated nature and limited distribution of this subspecies, an evaluation of critical habitat needs was initiated. Remote sensing and GIS technologies were used to identify and describe suitable habitat Computerized classification of satellite imagery of suitable vegetation, integrated with ancillary digital information on soil associations, roads, and water systems, revealed that human activity had played a positive role in the establishment and dispersal of pocket gophers in this area. This research represents an initial combination of classical systematic tools with remote sensing and GIS to investigate biogeographic patterns and evolution. This project establishes a framework for using an interdisciplinary approach to studying organisms with limited distributions, determining evolutionary status, and providing recommendations for ...
Boulez's Sonatine and the Genesis of His Twelve-tone Practice
This dissertation proposes that the Sonatine broadly unfolds a kinetic structure that stems from the traditional tension-relief model and, consequently, its dependence on tradition proves much deeper than Boulez would acknowledge.
The British Foreign Office Views and the Making of the 1907 Anglo-Russian Entente, From the 1890s Through August 1907
This thesis examines British Foreign Office views of Russia and Anglo-Russian relations prior to the 1907 Anglo-Russian Entente. British diplomatic documents, memoirs, and papers in the Public Record Office reveal diplomatic concern with ending Central Asian tensions. This study examines Anglo-Russian relations from the pre-Lansdowne era, including agreements with Japan (1902) and France (1904), the Russo-Japanese war of 1904-05, and the shift in Liberal thinking up to the Anglo-Russian Entente. The main reason British diplomats negotiated the Entente was less to end Central Asian friction, this thesis concludes, than the need to check Germany, which some Foreign Office members believed, was bent upon European hegemony.
"The Buck Stops With Me" : An Analysis of Janet Reno's Defensive Discourse in Response to the Branch Davidian Crisis
This study provides a genre analysis of Janet Reno's apologia in response to the Mt. Carmel disaster. Discussions of the events leading up to the crisis, Reno's rhetorical response, and relevant situational constraints and exigencies are provided.
Callibaetis Floridanus (Ephemeroptera: Baetidae) Life History and Production in a West Texas Playa
A life history study of Callibaetis floridanus was conducted over the wet cycle of a playa on the Southern High Plains of Texas from June through September 1995.
Career Paths of Presidents of Institutions Belonging to the Coalition for Christian Colleges and Universities
This study described the career paths of presidents of institutions of higher education which constitute the Coalition for Christian Colleges and Universities (CCCU). This study identified the demographic characteristics of the CCCU presidents and compared the career paths of the CCCU presidents with a corresponding national profile of American college presidents.
Carson McCullers beyond southern boundaries: diagnosing "An American Malady"
This study analyzes the nature of the Southern tradition and its influence on the criticism of the fiction of Carson McCullers with particular focus on the problems of determining what degree her Southern settings inhibit the interpretation of her works beyond a regional perspective.
Characterization of Aspartate Transcarbamoylase and Dihydroorotase in Moraxella Catarrhalis
Bacterial aspartate transcarbamoylases (ATCase's) are divided into three classes that correspond to taxonomic relationships within the bacteria. The opportunistic pathogen Moraxeila catarrhalis has undergone several reclassifications based on traditional microbiological criteria. The previously uncharacterized ATCase from M. catarrhalis was purified to homogeneity and its chemical properties characterized. The ATCase from M. catarrhalis is a class C ATCase with an apparent molecular mass of 480-520 kDa. The M. catarrhalis ATCase is a dodecomer composed of six 35 kDa polypeptides and six 45 kDa polypeptides. The enzyme has an unusually high pH optimum of greater than pH 10. The enzyme exhibited hyperbolic kinetic with a Km for aspartate of 2 mM. A single, separate 78 kDa dihydroorotase from M. catarrhalis was identified and it was not associated with ATCase. These data support the reclassification of M. catarrhalis out of the Neisseriaceae family.
Charge State Distributions in Molecular Dissociation
The present work provides charge state fractions that may be used to generate TEAMS relative sensitivity factors for impurities in semiconductor materials.
Chinese Leftist Urban Films of the 1930s
This thesis explores the films produced by leftist filmmakers of the 1930s which reflect the contemporary urban life in Shanghai.
Circumfusion: a Composition for Real-Time Computer Music Spatialization System
Two of the leading methodologies for spatializing audio over multiple channels include non-real-time multi-track tape and variations of real-time systems that often involve complex configurations of hardware. Of the latter, composers relying on MIDI as a control source have used pairs of sound modules, effects units and automation capable mixers to achieve spatialization over four loudspeakers. These systems typically employ intensity panning, Doppler shifts and reverberation. The present research details the development of a compact spatialization system using a MAX patch controlling a Kurzweil K2500 sampler. This system supports real-time diffusion of up to six simultaneous sound files over eight loudspeakers while incorporating intensity panning, Doppler shifts, delays and filtering. The MAX patch allows composers to choose from several automatic sound spatialization trajectories or to use the mouse to draw and store their own trajectories for later playback. The piece, Circumfusion, is an eighteen-minute composition of electroacoustic music utilizing this spatialization system.
Classification by Neural Network and Statistical Models in Tandem: Does Integration Enhance Performance?
The major purposes of the current research are twofold. The first purpose is to present a composite approach to the general classification problem by using outputs from various parametric statistical procedures and neural networks. The second purpose is to compare several parametric and neural network models on a transportation planning related classification problem and five simulated classification problems.
Classification of Denial in Sex Offenders; an Investigation of Response Styles
Standard psychological assessment instruments have not produced consistent results by which decisions can be made regarding the appropriate placement and legal disposition of an individual who has committed a sexual offense. The purpose of the present study was to systematically investigate deception and dissimulation as measured by three assessment instruments commonly utilized with sex offenders. A denial classification system was utilized in order to classify offenders into categories based on their level of admission to the legal system. The four group classification system did not produce significant differences on all measures of deception and dissimulation. Contrary to previous research, admitters were found to respond more defensively than deniers on one of the assessment instruments. In addition, partial deniers were identified as responding significantly differently from both admitters and deniers on a separate instrument. The differences found suggest that sex offenders' level of deception is multifaceted. Difficulties in identifying classificatory strategies and implications for theoretical conceptions of denial within this population are discussed.
Cloning of Carbonic Anhydrase from Cotton (Gossypium hirsutum L.)
Carbonic anhydrase is a ubiquitous zinc-metalloenzyme that catalyzes the interconversion of carbon dioxide and carbonate and has been found to play a wide range of roles in animals, plants and bacteria. Cotton genomic and cDNA libraries were screened for the plastidial isoform of carbonic anhydrase. The nucleotide sequences of two 1.2 Kb partial cDNA clones were determined. These clones exhibit high homology to carbonic anhydrases from other dicot plants and possess all the expected peptide motifs. For example, serine and threonine rich chloroplastic targeting peptide and conserved zinc binding residues are both present. These clones were utilized to isolate two carbonic anhydrase genes that were shown to encode different isoforms by PCR and RFLP analysis.
Cognitive Appraisal, Anxiety, and Coping Strategies in Mediating SAM Activation to a Psychological Stressor
The purpose of this study was to examine Dienstbier's (1989) hypothesis that SAM elicitation is prompted by subject's cognitive expectations of an acute stressor ('challenge' or 'threat' appraisal). Reported anxiety was also measured.
Community College Students' Perceptions of and Satisfaction with Factors Affecting Retention in a Major Urban Community College in the Southwestern United States
The purposes of this study were (a) to analyze whether any significant differences exist in students' satisfaction among the 11 composite scales/satisfaction measures of the SSI (retention programs); (b) to determine whether significant differences exist in satisfaction among students of the institution based on their demographic characteristics of gender, age, ethnicity, class load, and employment; and (c) to record findings, draw conclusions, and make recommendations from the study. The research was conducted using a questionnaire, The Student Satisfaction Inventory (SSI), developed by Juillreat and Schreiner in 1994. The instrument measures, among other matters, students' perceptions and satisfaction. The population of the study comprised all students at the institution during the 1996-1997 school year. A total of 312 students was sampled, with 182 (58%) returns received. Statistical treatments used to analyze the collected data included frequencies, percentages, means, standard deviation, multiple analysis of variances (MANOVA), one-way analysis of variance (ANOVA), and Tukey's Post Hoc t-test for multiple comparison.
A Comparative Study of School District Expenditures in Texas Since the Enactment of Senate Bill 7
The purposes of this study were to: (a) determine the effects of Senate Bill 7 on expenditures in Texas school districts, (b) compare similarities and differences in expenditures among property-poor, medium-wealth, and wealthy-districts, (c) analyze spending patterns in light of equalization efforts, and (d) provide useful data to researchers in the area of equalization and adequacy.
A Comparative Study of the Impact of the Total Quality Management Program on Exit Level Texas Assessment of Academic Skills Scores
The management style being used by school personnel in Texas and across the nation today is predominately that of a bureaucracy. This model was organized around the industrial revolution that was exercising authority at the turn of the century. Writers and researchers have pointed out that such a model is not capable of providing students the knowledge and skills they will need to enter an increasingly demanding society. One management style relatively new to the educational arena today is that of Total Quality Management. This study reports the results of the impact of the training in those principles by measurement of student test scores.
A Comparison of Cognitive Moral Development of Accounting Students at a Catholic University with Secular University Accounting Students
Previous research has shown that accountants may be inadequate moral reasoners. Concern over this trend caused the Treadway Commission (1987) and the Accounting Education Change Commission (1990) to call for greater integration of ethics into the student's training. Ponemon and Glazer (1990) found a difference in cognitive moral development (CMD) between accounting students at a public university and a private university with a liberal arts emphasis. This study expands Ponemon and Glazer's research by examining two liberal arts universities, one a private, secular institution and one a Catholic institution. The primary research question asks if Catholic university accounting students manifest greater CMD growth than secular university accounting students. Additionally, this study examines and compares the priority that accounting students from the different institutions place on ethical values versus economic values. It was expected that Catholic university accounting students would manifest both greater CMD growth and a greater concern for ethical values over economic values when compared with non-Catholic university accounting students. The study utilized a two-phase approach. In the first phase, an organizational study of two institutions was made to determine how each strives to integrate moral development into their accounting students' education. In the second phase, lower-division and senior accounting students were given three ethical and values related tasks to complete which propose to measure differences in ethical and economic values.
A Comparison of Teachers' Sense of Efficacy of Traditionally and Alternatively Certified First Year Teachers
The purpose of this study was to compare the self-efficacy of two groups of first year teachers working in a large urban school district in North Texas. Twenty-eight of the participants were certified teachers. Ten participants held college degrees unrelated to teaching and were undergoing an alternative certification process. The Teacher Efficacy Scale was administered at the beginning and the end of the school year. Data from this scale was analyzed to determine if there were differences between the regular certification teachers and the alternative certification teachers at the beginning and the end of the school year, and to determine if their sense of efficacy changed over the course of the school year.
A Comparison of the Academic Intrinsic Motivation of Gifted and Non-gifted Fifth Graders Taught Using Computer Simulations and Traditional Teaching Methods
This study investigated the use of interdisciplinary computer-based simulations compared to traditional teaching methods. The academic intrinsic motivation of gifted and non-gifted students was analyzed using a quasi-experimental design, similar to a pretest/posttest design.
Computational Complexity of Hopfield Networks
There are three main results in this dissertation. They are PLS-completeness of discrete Hopfield network convergence with eight different restrictions, (degree 3, bipartite and degree 3, 8-neighbor mesh, dual of the knight's graph, hypercube, butterfly, cube-connected cycles and shuffle-exchange), exponential convergence behavior of discrete Hopfield network, and simulation of Turing machines by discrete Hopfield Network.
Conception and Design of Constructed Wetland Systems to Treat Wastewater at the Biosphere 2 Center with Use of Reaction Rate Models and the Habitat Evaluation Procedure to Determine the Effects of Designing for Wildlife Habitat on Treatment Efficiency
A study was undertaken to explore relationships between wetland characteristics which make them efficient water purifiers versus their ability to serve as wildlife habitat. The effects of designing constructed wetlands for improved habitat on water treatment efficiencies were quantified. Results indicate that some sacrifice in treatment efficiency is required and that the degree of efficiency reduction is dependant upon pollutant loading rates. However, sacrifice in efficiency is much smaller than increase in habitat quality, and can be offset by increasing wetland area. A practical, theoretical application was then attempted.