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Problem-oriented approach to criminal investigation: implementation issues and challenges
As a proactive, information-based policing approach, problem-oriented policing emphasizes the use of crime analysis techniques in the analysis of the underlying causes of the problems that police deal with. In particular, analysis applications can be powerful tools for criminal investigation, such as crime reconstruction, profiling, IAFIS, VICAP, and CODIS. The SARA Model represents a problem-solving strategy of problemoriented policing. It aims to address the underlying causes of the problems and create substantial solutions. However, implementing problem-oriented policing requires a significant change in both the philosophy and structure of police agencies. Not only American policing but also the Turkish National Police should consider problem-oriented policing as an alternative approach for solving criminal activities. digital.library.unt.edu/ark:/67531/metadc2876/
Problems Encountered in Money Laundering Investigations
The purpose of this study is to identify how the U.S. is responding to money laundering and what kind of problems arise while countering it, beginning with a detailed description of money laundering, its stages, typologies, impacts, and complications. Due to the broad nature of this subject only three main issues form the focal point of this study: problems concerning the banking industry and other financial organizations, problems resulting from the limitations of law enforcement agencies, and problems arising from the lack of cooperation between and within financial institutions and law enforcement agencies. Several probable solutions to the above problems are identified: Considering the financial industry, there are loopholes in the Bank Secrecy Act (BSA) and in other regulations that apply to the industry. Thus, there is a comparison of the Subjective Model vs. Objective Model in terms of reporting systems for financial organizations. On the law enforcement side, the priority is the need to update and upgrade their technology and investigation mechanisms in order not to fall behind the criminals. Finally, cooperation is something that can be achieved through mutual respect and understanding of the priorities of each side, which can be achieved by the creation of an upper agency of whose members represent both sides of the combat efforts. digital.library.unt.edu/ark:/67531/metadc2856/
Process, Form, and Function
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Process and form have always been important to my work. I emphasize the soft qualities of clay while working with traditional forms that are altered for visual interest. Usability is very important, the forms have to function well according to their intended use. The relationship between form and manipulation relied on usability of the form. Functionality was paramount within this body of work. I consciously searched for balance between form and manipulation, form and glaze, form and function, and overall character. Though altered, the forms were traditional and dependent on function. Manipulations of the forms, surface treatment, and deep colorful glazes contributed to creating harmony between function and expression. Personal stylistic elements became refined through working on this project. The body of work that was made allocated personal expression and new variations on functional forms. This project provided an opportunity for exploration and evaluation of form and my working process. digital.library.unt.edu/ark:/67531/metadc5805/
Psychological Hardiness and Biochemical Markers of Acute Stress
The establishment of physiological norms for psychologically hardy vs. non-hardy individuals was attempted by examination of levels of salivary cortisol and urinary norepinephrine before and after a mid-term examination stressor. Normative data was collected on the reported frequency of stressors and their severity one week prior to the examination, and self-reported ratings of stress immediately prior to the examination. Performance on the examination as a function of hardiness was explored. Associations between demographic variables and psychological hardiness were also studied. Results from this study were inconclusive in establishing physiological norms for psychologically hardy individuals. Associations were found between: 1) hardiness and frequency of stressors; 2) hardiness and age; and 3) self-reported ratings of stress and anxiety as measured by the State-Trait Anxiety Inventory (STAI). digital.library.unt.edu/ark:/67531/metadc2884/
Purification of Aspartate Transcarbamoylase from Moraxella (Branhamella) catarrhalis
The enzyme, aspartate transcarbamoylase (ATCase) from Moraxella (Branhamella) catarrhalis, has been purified. The holoenzyme has a molecular mass of approximately 510kDa, harbors predominantly positive charges and is hydrophobic in nature. The holoenzyme possesses two subunits, a smaller one of 40 kDa and a larger one of 45 kDa. A third polypeptide has been found to contribute to the overall enzymatic activity, having an approximate mass of 55 kDa. The ATCase purification included the generation of cell-free extract, streptomycin sulfate cut, 60 °C heat step, ammonium sulfate cut, dialysis and ion, gel-filtration and hydrophobic interaction chromatography. The enzyme's performance throughout purification steps was analyzed on activity and SDS-PAGE gradient gels. Its enzymatic, specific activities, yield and fold purification, were also determined. digital.library.unt.edu/ark:/67531/metadc2864/
Rail Transit and Its Influence on Land Use: A Dallas Case Study
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Mass transit investments continue to be utilized in many cities as means of dealing with various transportation issues. In Dallas Texas, light rail transit was developed with the hopes of encouraging compact and orderly growth. This research uses the DART system as a case study in examining transportation/land use relationships in Dallas. As such, this thesis reviews past research that examined transit systems impacts on urban areas, analyzes historical changes in land use pattern development around the existing twenty stations of the DART light rail starter system, and summarizes the progression of land use trends in the transit corridor as they relate to DART impacts. Results of this study suggest that DART's light rail system has been an effective tool used in achieving the transportation and land use goals for the region. Finally, recommendations are presented with respect to what can be expected for future light rail development in Dallas. digital.library.unt.edu/ark:/67531/metadc2847/
The regulatory roles of PyrR and Crc in pyrimidine metabolism in Pseudomonas aeruginosa
The regulatory gene for pyrimidine biosynthesis has been identified and designated pyrR. The pyrR gene product was purified to homogeneity and found to have a monomeric molecular mass of 19 kDa. The pyrR gene is located directly upstream of the pyrBC' genes in the pyrRBC' operon. Insertional mutagenesis of pyrR led to a 50- 70% decrease in the expression of pyrBC', pyrD, pyrE and pyrF while pyrC was unchanged. This suggests that PyrR is a positive activator. The upstream regions of the pyrD, pyrE and pyrF genes contain a common conserved 9 bp sequence to which the purified PyrR protein is proposed to bind. This consensus sequence is absent in pyrC but is present, as an imperfect inverted repeat separated by 11 bp, within the promoter region of pyrR. Gel retardation assays using upstream DNA fragments proved PyrR binds to the DNA of pyrD, pyrE, pyrF as well as pyrR. This suggests that expression of pyrR is autoregulated; moreover, a stable stem-loop structure was determined in the pyrR promoter region such that the SD sequence and the translation start codon for pyrR is sequestered. β-galactosidase activity from transcriptional pyrR::lacZ fusion assays, showed a two-fold in increase when expressed in a pyrR- strain compared to the isogenic pyrR+ strain. Thus, pyrR is negatively regulated while the other pyr genes (except pyrC) are positively activated by PyrR. That no regulation was seen for pyrC is in keeping with the recent discovery of a second functional pyrC that is not regulated in P. aeruginosa. Gel filtration chromatography shows the PyrR protein exists in a dynamic equilibrium, and it is proposed that PyrR functions as a monomer in activating pyrD, pyrE and pyrF and as a dimeric repressor for pyrR by binding to the inverted repeat. A related study discovered that the catabolite repression control (Crc) protein was indirectly involved in pyr gene regulation, and shown to negatively regulate expression of PyrR at the posttranscriptional level. digital.library.unt.edu/ark:/67531/metadc2875/
Relationship Between Acceptance of Sexual Double Standard Among Male and Female Students and Attitude Toward Sexual Harassment Involving Instructor and Student
The study assessed the relationship between acceptance of sexual double standard and attitude toward sexual harassment among students (N = 426, 141 males and 285 females). A principal components factor analysis with varimax rotation extracted 4 harassment factors: student blame, professor blame, reactions, and feelings about harassment. Controlling for marital status, age, race, and sexual double standard, one-way ANOVA revealed that gender significantly (p=.0001) affected attitude toward sexual harassment. Males reported less sensitivity toward harassment than females. Multiple regression analyses indicated that as acceptance of sexual double standard increases, sensitivity to sexual harassment decreases (p=.001), controlling for marital status, age, race, and gender. Controlling for marital status, age and race, two-way ANOVA revealed an interaction effect between gender and sexual double standard for student blame (p<.0001) and professor blame (p<.0044), where males reported higher levels of blame for both groups under the low sexual double standard condition. digital.library.unt.edu/ark:/67531/metadc5811/
The Relationship between Executive and Psychosocial Functioning in Children Treated for a Brain Tumor
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This study examined the relationship between executive and psychosocial functioning in 45 children and adolescents age 6 to 17 years who had been treated for a brain tumor. Executive functioning deficits can profoundly impact an adult's ability to function successfully in life. The purpose of the study was to evaluate the potential impact of executive functioning deficits on the day-to-day functioning in a pediatric population. The domains of executive functioning assessed included cognitive flexibility, conceptual thinking, sustained attention, and response inhibition. Psychosocial functioning was assessed using both parent and child report. Several significant relationships were found for adolescents ages 15 and older, with effect sizes ranging from medium to large. In particular, cognitive flexibility and conceptual thinking were significantly related to parent report of depression and adaptive functioning. Fewer significant relationships with smaller effect sizes were found for younger children. The results may reflect the developmental emergence of executive functioning abilities and late effects of executive functioning deficits upon psychosocial functioning. The correlational design of this study precludes definitive statements regarding the temporal nature of the relationship. Additional research, including longitudinal research and replicatory studies, will be needed to further investigate the developmental consequences of executive functioning impairment. digital.library.unt.edu/ark:/67531/metadc2848/
The relationship between models of student laptop computer use and teacher instructional behavior
This study investigated the relationship between four models of student laptop computer use and three components of teacher instructional behavior: planning, implementation of instruction, and evaluation of instruction. The four models of use: full access, dispersed, class set, and mixed, represented the numerous ways teachers in public and private schools and school districts nationwide implemented student use of laptop computers. Teacher planning behavior was investigated with regard to time, frequency, complexity, difficulty, the need for revision, and use of technological resources and materials. Implementation of instruction was examined with regard to student grouping, instructional strategies, instructional content/subject matter, teacher and student roles, assignments and learning tasks, and instructional activities. The evaluation of instruction component was examined with regard to assessment tasks, grading, and assessment of homework. Using a researcher-designed questionnaire, data was gathered in a single-stage cross-sectional survey from 356 teachers working in 74 public and private schools nationwide. Results indicated models of student laptop computer use had differential effects on teacher instructional behaviors. On average, teachers found planning to be more arduous, but more collegial, especially in the mixed model. The full access and mixed models were more likely to advance a constructivist approach to teacher instructional behaviors with regard to implementation and evaluation of instruction. Results from this study had implications for future research. The effects of student laptop computer use on the full access and mixed models of use should be given further study with regard to the implementation and evaluation of instruction. digital.library.unt.edu/ark:/67531/metadc2917/
The relationship of attachment and shame to anorexia: A case study comparing restrictive and normal eaters
Research has described and many clinicians have reported the anorectic patient as socially disconnected, having a disembodied sense of self, perfectionist expectations, and inadequate and shameful feelings. The more intense the internal war, the more food-focused and self-defeating behavior ensues, thwarting one's ability to receive value, self-acceptance, and love. Addressing the anorexia phenomenon, this study considered, from a sociological perspective, the dynamics of attachment and shame. On the basis of 4 propositions and using a multi-method, case-replication design, attachment and shame patterns for 5 restrictive and 5 normal eaters were compared, as determined by scores from the Parental Bonding Instrument, Inventory of Parental and Peer Attachment, Internalized Shame Scale, and personal interviews. Analysis was progressive, as propositions were tested by pattern-matching steps of rating, comparing, and interpreting recurring responses to self-report and interview questions. All anorectics reported a dominant mother, with whom 4 were over attached and struggled ambivalently for autonomy, and a quiet, inexpressive father, whom 4 considered frequently absent or unavailable. As compared to normal eaters, anorectics' trust and communication scores were lower for both parents and peers. Generally, anorectics showed markedly higher internalized shame. Findings indicated that nonoptimal parental bonding patterns were related to shame. The maternal bonding pattern of affectionless control (high protection, low care) showed the highest shame score, although affectionate constraint (high protection, high care), the most frequently found pattern, also showed a high shame level. There were polarized differences between restrictive and normal eaters, especially in regards to self-hatred, low self-esteem, and suicide ideation. Anorectics also reported more inferiority and peer alienation. Other emergent findings were noted. A modification of a self-definition/relatedness illustration was suggested, as well as a model for the development of anorexia. Social implications, treatment suggestions, and future research recommendations were also presented. digital.library.unt.edu/ark:/67531/metadc2904/
Revisiting Eric Nordlinger: The Dynamics of Russian Civil- Military Relations in the Twentieth Century
This paper examines the role that military has played in the political development of the former Union of Soviet Socialist Republics and the modern Russian Federation. By utilizing the theoretical tenets of Eric Nordlinger, this paper endeavors to update and hopefully revise his classic work in civil-military relations, Soldiers in Politics. Chapter one of this paper introduces many of the main theoretical concepts utilized in this analysis. Chapter two considers the Stalinist totalitarian penetration model that set the standard for communist governments around the world. Chapter three follows up by addressing the middle years of Khrushchev and Brezhnev. Both reformed the military in its relation to the party and state and made the armed forces a more corporate and professional institution. Chapter four pinpoints the drastic changes in both the state and armed forces during Gorbachev's perestroika and glasnost. The military briefly ventured to a point it never gone before by launching a short coup against the last Soviet president. Chapter five focuses on the last ten years in the Russian Federation. While still a professional organization typical of the liberal model of civil-military relations, the armed forces face great uncertainty, as economic and social problems demand more of their time and resources. Chapter six concludes by speculating on the future of Russian civilmilitary relations and reconsiders the importance of Nordlinger's elegant yet parsimonious work. digital.library.unt.edu/ark:/67531/metadc2918/
Similarities in the Use of Dramatic Recitative Style in the Music of Claudio Monteverdi and Giuseppe Verdi, with Some Performance-Practice Issues
The objective of this dissertation, inspired by performance experience, was to establish the similarities in the use of recitative style in the music of Claudio Monteverdi and Giuseppe Verdi. To achieve this objective, their use of recitative style was examined through comparative analysis of four scenes from their operas: “Arianna's Lament” from L'Arianna and “Disprezzata regina” from L'incoronazione di Poppea by Monteverdi, and “Condotta ell'era in ceppi” from Il trovatore and “Judgment Scene” from Aida by Verdi. The examination of the similarities included a discussion of the following: (a) the historical influences and cultural backgrounds of the composers; (b) general similarities in their compositional approaches to recitative style; (c) comparable characteristics of the dramatic recitative style in the early Baroque monody and in Verdi's operas; (d) similarities in musical characterization and expression of affective and emotional content through stylistic musical devices; (e) similarities in the composers' approaches to vocal and acting issues with special emphasis on the problems of diction; and (f) some related performance-practice issues. A discussion of the poetic lament and the influence of its form and content on musical setting was also a part of this research. The comparative research revealed numerous similarities in the historical circumstances influencing Monteverdi's and Verdi's choice of musical styles; their motivation; formal and stylistic characteristics of their dramatic recitative scenes; their choice of libretto; their use of the elements of lament; their musical treatment of emotional content of the text; and their prerogatives in vocal and acting issues. Numerous similar characteristics were also established regarding vibrato, tempo, rhythm, and ornamentation in the performance practice of the early Baroque recitative soliloquy and Verdi's dramatic recitative scenes. The similarities of the four scenes' functions, topics, form, and characterization through devices of musical style indicated a fundamental continuity in the development of Italian opera from its inception to the end of the nineteenth century. digital.library.unt.edu/ark:/67531/metadc2880/
Simulating Statistical Power Curves with the Bootstrap and Robust Estimation
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Power and effect size analysis are important methods in the psychological sciences. It is well known that classical statistical tests are not robust with respect to power and type II error. However, relatively little attention has been paid in the psychological literature to the effect that non-normality and outliers have on the power of a given statistical test (Wilcox, 1998). Robust measures of location exist that provide much more powerful tests of statistical hypotheses, but their usefulness in power estimation for sample size selection, with real data, is largely unknown. Furthermore, practical approaches to power planning (Cohen, 1988) usually focus on normal theory settings and in general do not make available nonparametric approaches to power and effect size estimation. Beran (1986) proved that it is possible to nonparametrically estimate power for a given statistical test using bootstrap methods (Efron, 1993). However, this method is not widely known or utilized in data analysis settings. This research study examined the practical importance of combining robust measures of location with nonparametric power analysis. Simulation and analysis of real world data sets are used. The present study found that: 1) bootstrap confidence intervals using Mestimators gave shorter confidence intervals than the normal theory counterpart whenever the data had heavy tailed distributions; 2) bootstrap empirical power is higher for Mestimators than the normal theory counterpart when the data had heavy tailed distributions; 3) the smoothed bootstrap controls type I error rate (less than 6%) under the null hypothesis for small sample sizes; and 4) Robust effect sizes can be used in conjuction with Cohen's (1988) power tables to get more realistic sample sizes given that the data distribution has heavy tails. digital.library.unt.edu/ark:/67531/metadc2846/
The Songs of David Amram: A representative analysis and review of published vocal music for accompanied and unaccompanied voice
David Werner Amram III, born in Philadelphia in 1930 is a celebrated American composer whose works have increasingly gained worldwide attention. His compositions embrace many genres including incidental music, film scores, symphonies, concertos, sonatas, instrumental trios, quartets, cantatas and operas as well as songs. One of Amram's earliest published songs, Pull My Daisy, is from his musical score for the experimental film of the same name. The song, text by Allen Ginsberg, Neal Cassady and Jack Kerouac, is set in a jazz style. Twelve of his songs, published in three collections are drawn either from his incidental music for Shakespeare plays or from his chamber opera, Twelfth Night. Another group written for baritone voice, wind and string quintets is entitled Three Songs for America. Trail of Beauty for mezzosoprano, oboe and orchestra contains four settings of Native American texts. The first chapter of this paper provides a biography of the composer. Succeeding chapters give some analysis of representative songs from each published group, background to their composition, texts, information from reviews where available, and the composers own comments from telephone interviews with the writer. An appendix contains brief illustrations of music from representative songs. It is observed that Amram's multifaceted musical interests have led him to write appealing and interesting music, both instrumental and vocal. digital.library.unt.edu/ark:/67531/metadc2913/
Spatial and Temporal Patterns of Areal and Volumetric Phytoplankton Productivity of Lake Texoma
Phytoplankton productivity of Lake Texoma was measured for one year from August 1999 to August 2000 for four stations, using the oxygen change method and laboratory incubation. Mean values of the photosynthetic parameters, PBmax and alphaB ranged from 4.86 to 46.39 mg O2.mg Chl-1.hr-1 for PBmax and 20.06 to 98.96 mg O2.mg Chl-1.E-1.m2 for alphaB. These values were in the range to be expected for a highly turbid, temperate reservoir. Estimated gross annual areal productivity ranged from 594 g C.m2.yr-1 (P.Q. = 1.2), at a station in the Washita River Zone to 753 g C.m2.yr-1 at a station in the Red River Zone, of the reservoir. Gross annual areal productivity at Station 17, in the Main Lake Zone, was 708 g C.m2.yr-1. Gross areal and volumetric productivity showed distinct seasonal variation with Photosynthetically Available Radiation (PAR) and temperature. Trophic status estimated on a station-by-station basis, using net productivity values derived from gross productivity and respiration estimates, was mesotrophic for all the stations, though one station approached eutrophy. Net productivity values ranged from 0.74 to 0.91 g C. m-2.d-1. An algal bioassay conducted at two stations in August 2000, revealed that phosphorus was most likely the nutrient limiting photosynthesis at both these stations, although the more turbid riverine station was primarily light-limited. digital.library.unt.edu/ark:/67531/metadc2915/
Spirituality, health locus of control, and wellness in organizational health promotion and wellness programs
The relationship between an individual's level of spirituality, health locus of control, and participating in wellness activity was investigated. The relationship between spirituality, health locus of control on physical health was also investigated. The research question was based on prior studies that reported people who are more spiritual are healthier. Does their spirituality lead to increased levels of health, or are individual's who are more spiritual more likely to proactively take control of their health and engage in health promoting behaviors? One hundred and fifteen male and female employees completed The Spiritual Involvement and Beliefs Scale (SIBS), a spirituality measure, The Multidimensional Health Locus of Control Scale, a measure of locus of control related to health and healthcare, and The Center for Disease Control's (CDC) Health Risk Appraisal, a self-report measure of participation in health behaviors. Physical measures of health were obtained by obtaining Body Mass Index, blood pressure readings, and a cholesterol screening. The current study looked at level of spirituality (internal, external), level of health locus of control (internal, powerful other, chance) and participation in wellness/health promoting behaviors and health. Correlational analyses were performed on the relationship between spirituality and health locus of control. Hierarchical multiple regressions were performed on the internal spirituality and internal health locus of control to examine the relationship between spirituality, health locus of control and positive health behaviors and level of physical health. Stepwise discriminant function analysis using spirituality and health locus of control as predictor variables for the health-behavior criterion variables were performed. Discussion of the results, limitations of the current study and recommendations for future research were presented. digital.library.unt.edu/ark:/67531/metadc2900/
Structuralist and interactionist perspectives of collective behavior and control of crowds.
The purpose of this thesis is to understand the concept of collective behavior from different theoretical perspectives and the policy implications they imply for the Turkish Riot Police Units. The civil disturbances in the 1960s have clearly illustrated range of problems in the domain of crowd control. This work will start with the general characteristics and the classification of collective behavior. Second, two main perspectives on collective behavior, which are the structuralist and the interactionist perspectives, will be examined respectively. The question will be asked whether these two perspectives efficiently and effectively explain the crowds and the crowd control. Finally, the other factors in crowd control will be explored, and recommendations concerning the handling of crowds in a more peaceful manner will be made. digital.library.unt.edu/ark:/67531/metadc2898/
A Study Of Correlations Between Learning Styles Of Students And Their Mathematics Scores On The Texas Assessment of Academic Skills Test
The problem of this study was to determine whether learning styles of students affect their math achievement scores on the Texas Assessment of Academic Skills Test. The research questions addressed relevant to this study were: 1. Is there a positive correlation between students' learning styles and their achievement test scores in mathematics? 2. Is there a positive correlation between specific sub group's (as deemed by the state of Texas) and gender's learning styles and their achievement test scores in mathematics? The Pearson Product Moment Correlation coefficient and the Point-biserial correlation analysis was applied to the data collected from 500 fifth grade students attending a North Texas Intermediate school. The significance level was established at the .05 level. Part of the data was the student's responses to the Learning Style Inventory by Dunn, Dunn and Price. The findings established that the learning style preferences of all students in the area of persistence significantly impacted their math achievement scores. Gender and ethnicity were mitigating factors in the findings. These learning style preferences significantly impacted achievement in the following ways: * Caucasian students' preference of a high level of persistence in completing a difficult task. * Hispanic students' preference for a warm learning environment and motivational factor of pleasing the teacher. * Afro-American students' preference for kinesthetic learning. * Female students' learning style preferences appear in: - the design of the learning environment - the need for intake of food and/or drink - a high level of responsibility - a high sense of self-motivation , of teacher and of parent motivation. * Male students' learning style preferences appear in: - a warm learning environment - a high level of responsibility - the need for intake of food and/or drink - a high sense of teacher and of parent motivation - a late morning learning In summary, the author suggests that supplying the teachers with information concerning students' learning style preferences will benefit student achievement. digital.library.unt.edu/ark:/67531/metadc2889/
A study of freshman interest groups and leadership practices at Texas Woman's University
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This study investigated the level of leadership practices and retention rates of freshman students at Texas Woman's University. The data for the study were collected using the Leadership Practices Inventory, Student Version. The sample for the study consisted of 151 freshman students. The students were each placed in one of three control groups. Group A students (the treatment group) were in the Neighbors Educated Together Program (NET). Group B students (control group) were in one of two university-sponsored programs (COLORS or University 1000), and Group C students (control group) were the residual group of first-time college freshmen. These three groups were surveyed prior to their participation in the NET program or a university-sponsored program and again at the end of 14 weeks. In addition, retention rates were examined on the 12 class day of the spring semester. The study found statistically significant differences (p <. 05) on the pretests and posttests between Group C, residual students, and the other two groups on the Enabling the Followers to Act subscale, the Inspiring a Shared Vision subscale, and Encouraging the Heart subscale. Group A, NET students, and Group B, COLORS/University 1000 students, showed no statistically significant differences between groups. The difference from the residual group could indicate that students who self-select into programs such as NET, COLORS, and University 1000 are more likely to engage in practices measured by the subscale prior to enrollment in the respective programs. No statistically significant differences were found on the Challenging the Process or Modeling the Way subscales. The lack of significance shows that there are no differences in practices for any of these groups prior to enrollment at the university or as a result of participation in a university-sponsored program such as NET, COLORS, or University 1000. A chi-square test was performed following the 12 class day for the Spring 2001 th semester. Approximately 89% of the students in Group C Residual, 97% of Group B COLORS/University 1000, and 91% of Group A NET were retained. The chi- square frequency test revealed no statistically significant differences in level of retention between groups. digital.library.unt.edu/ark:/67531/metadc2837/
A Study of the Effect of School-Sponsored, Extra- Curricular Activities on High School Students. Cumulative Grade Point Average, SAT Score, ACT Score, and Core Curriculum Grade Point Average
This study investigated the effect of school-sponsored, extra-curricular activities on academic achievement for students at a private school in north central Texas. Students selected for this study were graduates from the classes of 1996, 1997, 1998, 1999, and 2000. With a minimum participation of two years during grades nine through twelve, students were categorized into subgroups of activities. After eliminating students who participated in more than one of the extra-curricular activities of music, drama, visual arts, and athletics, three hundred sixty-one students were represented. The identity of students was encoded and information was recorded for gender, school-sponsored, extra- curricular activities, cumulative grade point averages, SAT Scores, ACT Scores, and cumulative grade point averages in core curriculum subjects. A two-way ANOVA test with a two-by-five factorial design was completed for research questions one through four. A one-way ANOVA with a one-by-five factorial design was completed for research question five. When a significant F was found, Scheffe and LSD post hoc tests were completed to determine pair wise interaction. Statistical differences did exist when comparing school-sponsored, extra-curricular activities and cumulative grade point averages with musicians having a significantly higher cumulative grade point average, SAT scores, and ACT scores than athletes. A significant difference was found among the activity subgroups regarding the cumulative grade point averages in the core curriculum subjects of foreign language, history/English (an interdisciplinary subject at the studied school), mathematics, and science with musicians scoring significantly higher than athletes in all subjects. It is recommended that further studies be conducted to investigate the impact of activities on student achievement. Studies might include larger and different populations, the impact of participation at a younger age, and the impact of other activities on student achievement. digital.library.unt.edu/ark:/67531/metadc2879/
Submerged wood inhabiting macoinvertebrates of the Elm Fork of the Trinity River, Texas: Assemblage analyses, comparisons to the benthic fauna, and a study of Cyrnellus fraternus (Trichoptera: Polycentropodidae)
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Taxonomic composition and spatio-temporal variability of macroinvertebrates inhabiting snags were examined from an 8-km segment of the Elm Fork of the Trinity River. Seventy-seven macroinvertebrate taxa were collected from submerged wood during the study. Assemblages were highly variable spatially and temporally, especially among seasons. An ordination of species and environment did not find snag taxa to have striking correlations with many of the selected environmental variables, although there were some trends in flow-mediated species distributions. There were significant seasonal differences in the abundances of some taxa, particularly among the Chironomidae (Diptera). The Tribe Orthocladiini was numerically abundant during the winter, while the Tribes Chironomini and Tanytarsini dominated the summer and autumn. Additionally, this study included a secondary production and microdistribution analysis of a population of the caddisfly Cyrnellus fraternus. Distributions of C. fraternus were restricted to snags, the most stable substratum for retreat building and for resisting periodic high waters. Larvae were not found in the soft sand and mud benthic habitats near submerged wood. The insects were multivoltine with a minimum of three generations per year. Pupae were collected July through September and adults emerged from May through October. The population overwintered as larvae. Estimated annual production was 1,015.4 mg/m2/yr. Mean standing stock biomass was 61.24 mg/m2, the cohort production/biomass ratio was 4.59, and the annual production/biomass rate was 16.58/yr for this population. Standing stock biomass ranged from 1.6 to 349.1 mg/m2 during the year and was significantly higher in autumn and summer than winter. Larvae were more abundant in the lower portions of the study area where flow was reduced for much of the year, than in the upper reaches, characterized by higher current velocities. C. fraternus larvae were found in their highest numbers on snags with dense deposits of silt and sand. digital.library.unt.edu/ark:/67531/metadc2843/
Success For Life in Thailand: Educational and Cultural Implementation
The purpose of this study was to investigate whether implementing Success For Life in Thailand would meet the needs of Thai public policy, the Thai educational system, and Thai culture. There were 46 respondents, including 4 early childhood professionals, 4 preschool owners, 6 directors, and 32 teachers. All respondents received the Success For Life training workshop. Each participant was requested to complete a questionnaire on their understanding and awareness of brain development and function, thoughts about implementing Success For Life in Thailand, and the appropriateness of Success For Life for the Thai educational system, Thai public policy, and Thai culture. In addition, all of the 4 early childhood professionals, 4 preschool owners, and 6 directors, and 8 teachers were interviewed to expand the information provided in the questionnaires. Two preschools implemented Success For Life in November 2000. Another 6 preschools implemented Success For Life in June 2001. Participating teachers in the preschools where Success For Life was implemented in November 2000 were also asked to write bimonthly journals. Journal entries included information about how participants changed their teaching styles after receiving the Success For Life training. Research findings indicated that Success For Life was appropriate to the preschool level in Thailand. Recommendations for Success For Life implementation in Thailand were 1) clarify the meaning of “teacher-centered” to conform with Thai policy, 2) modify the mathematics curriculum to reflect higher level concepts, 3) include ethics and financial education in the curriculum, 4) include in Success For Life staff development methods for teaching children with special needs, different learning styles, and in ESL programs, and 5) clarify how, in the Success For Life curriculum, children have a right to access to the Thai dream instead of the American Dream. digital.library.unt.edu/ark:/67531/metadc2870/
The Symbolic Representation of Latinos: A Content Analysis of Prime-Time Television
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The media are powerful agents of socialization in modern society influencing values, beliefs, and attitudes of the culture that produces them. Both the quantity and quality of Latino images in the media may reflect and reinforce the place of Latinos in United States society. This study examines how Latinos are portrayed in television entertainment programming by addressing two major research questions: 1) What is the extent of Latino recognition on prime-time television? and 2) What is the extent of respect accorded Latinos on prime-time television? A one-week sample of prime-time television programming airing on three networks yielded 47 programs and 807 characters for analysis. Using content analysis methodology, recognition is identified by examining the frequency and proportional representation of Latino television portrayals and respect is measured by examining the types and significance of these roles. The results indicate an overall lack of diversity on prime-time television with only 11 of the 47 programs analyzed reaching 50% or more of the maximum possible diversity in their racial and ethnic portrayals. Specifically, Latinos represent only 3% of primetime television characters, less than one-fourth of their proportion of the nation's population. Compared to non-Hispanic Whites, Blacks, and Asians, Latinos are the group least likely to occupy major roles in prime-time entertainment shows and represent only 1.9% of the total opening cast credits. Latinos are still presented stereotypically but are more often presented in a generic fashion with no reference to ethnic cultural experiences. The extent of recognition and respect accorded Latinos in prime-time television is severely limited, thus there is a need for continued research and dialogue regarding symbolic media images of Latinos. The findings have implications for social scientists interested in media forms and content as cultural artifacts, members of the television media industry responsible for program development and distribution, and college media educators responsible for training young media professionals. digital.library.unt.edu/ark:/67531/metadc2838/
Synthesis and properties of novel cage-functionalized crown ethers and cryptands.
A novel cryptand was synthesized which contained a 3,5-disubstituted-4- oxahexacyclo[5.4.1.02,6.03,10.05,9.08,11] dodecane "cage" moiety. In alkali metal picrate extraction experiments the cryptand exhibited high avidity towards Rb+ and Cs+, when compared with the corresponding model compound. A computational study of a series of cage-functionalized cryptands and their alkali metal-complexes was performed. The X-ray crystal structure of a K+-complexed bis-cage-annulated 20-crown-6 was obtained. The associated picrate anion was found to be intimately involved in stabilization of the host-guest complex. The interaction energy between the host-guest complex and picrate anion has been calculated, and the energy thereby obtained has been corrected for basis set superposition error. digital.library.unt.edu/ark:/67531/metadc2896/
Thermal, Electrical, and Structural Analysis of Graphite Foam
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A graphite foam was developed at Oak Ridge National Laboratory (ORNL) by Dr. James Klett and license was granted to POCO Graphite, Inc. to manufacture and market the product as PocoFoam™. Unlike many processes currently used to manufacture carbon foams, this process yields a highly graphitic structure and overcomes many limitations, such as oxidation stabilization, that are routinely encountered in the development of carbon foam materials. The structure, thermal properties, electrical resistivity, isotropy, and density uniformity of PocoFoam™ were evaluated. These properties and characteristics of PocoFoam™ are compared with natural and synthetic graphite in order to show that, albeit similar, it is unique. Thermal diffusivity and thermal conductivity were derived from Fourier's energy equation. It was determined that PocoFoam™ has the equivalent thermal conductivity of metals routinely used as heat sinks and that thermal diffusivity is as much as four times greater than pure copper and pure aluminum. SEM and XRD results indicate that PocoFoam™ has a high degree of crystalline alignment and near theoretical d spacing that is more typical of natural flake graphite than synthetic graphite. PocoFoam™ is anisotropic, indicating an isotropy factor of 0.5, and may yield higher thermal conductivity at cryogenic temperatures than is observed in polycrystalline graphite. digital.library.unt.edu/ark:/67531/metadc2836/
Transnational Organized Crime and Destabilization in Democracies, Russian Organized Crime as Case Study
Transnational organized crime has been prevalent during the last century, but it recently has been recognized as a threat to the world order. Governments throughout the world, along with the intergovernmental organizations identified this phenomenon as a new threat to domestic and international security. This paper attempts to explain the impacts of transnational organized crime on the functioning of democratic societies by adopting the Russian Organized Crime as case study. The descriptive research with regard to definition, scope and organization of transnational organized crime, along with the objectives, limitations and methodology of this research will be included in the first chapter. Recent trends observed in organized crime`s character and the impact of organized crime on the political economies of democratic regimes will be contained in the following chapters. Pre-conditions for a broader response to transnational organized crime and conclusive remarks will be the context of the last chapter. digital.library.unt.edu/ark:/67531/metadc2827/
Two selected works for solo trumpet commissioned by the International Trumpet Guild: A structural and performance analysis with a history of the commission project, with three recitals of selected works by Arutunian, Haydn, Fasch, Chaynes and others
An historical overview of the ITG commission project is presented, as well an analysis of formal organization and significant features for two of the commissioned works: Sonata for Trumpet and Piano by Norman Dello Joio and Sonata for Trumpet and Piano by Eric Ewazen. Complete histories of all works and information concerning their premieres is chronicled. The degree of difficulty of each composition is assessed through an investigation of tessitura, range, melodic contour, endurance factors, articulation, fingerings, and technical features of the accompaniment (when applicable). Analysis of tempi and dynamics, articulation and phrasing, and timbral considerations provides additional points of study. The thirteen commissioned solo works from 1978 to 1993 are: Sonata for Trumpet and Piano by Norman Dello Joio, Concerto for Trumpet and Wind Orchestra by Bernhard Heiden, Laude by Stan Friedman, Concerto for Trumpet and Strings by Raymond Premru, Chamber Music VII: Ceremonies and Chamber Music VIII by Robert Suderburg, Sonata for Trumpet and Piano by Fisher Tull, Concerto for Trumpet and Orchestra by William Schmidt, Concerto for Trumpet and Wind Ensemble by Jan Bach, Arioso for Trumpet and Woodwind Quintet by Jerzy Sapieyevsky, Invocation of Orpheus by Robert X. Rodriguez, Triptych by David Sampson, and Sonata for Trumpet and Piano by Eric Ewazen. The importance of these works and their impact on the trumpet repertoire is assessed. Possible reasons for the acceptance of some of these works by trumpeters versus the lack of acceptance of the others are proposed. Through interviews with some of the composers, analyses of the compositions and a comparative survey of performance programs by members of the International Trumpet Guild, conclusions regarding the effectiveness of the commissioning project and its future are drawn. digital.library.unt.edu/ark:/67531/metadc2859/
Unintended Outcomes: The effects of an entity's educator preparation accreditation on access to certification for individuals of color
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The purpose of this dissertation was twofold. First, the study sought to determine if the Texas Academic Skills Program (TASP) Reading score predicts success on the Examination for the Certification of Educators in Texas (ExCET). Second, the study addressed the effect on individuals of color of raising the minimum TASP Reading score entrance requirement for admission to teacher preparation programs. Data were collected from the ExCET Office of a Carnegie I metropolitan university. The defined sample consisted of 961 participants who had a TASP Reading score and had taken an Elementary Comprehensive ExCET, an Elementary Professional Development ExCET or a Secondary Professional ExCET between September 1999 and January 2001. Linear Regression, Box Test, Predictive Discriminate Analysis, and frequency distribution tables were used for analyses. This investigation examined the effects of the independent variable of TASP Reading score on the performance of participants on the dependent variable, the ExCET. Four null hypotheses were tested at the .05 level of significance. The TASP Reading score was a statistically significant predictor for success on the Elementary Comprehensive ExCET, Elementary Professional Development ExCET, and the Secondary Professional Development ExCET. However, the Predictive Discriminate Analysis indicated that a TASP Reading score of 220 predicted that no candidates would fail the Elementary Comprehensive ExCET, 6 participants would fail the Elementary Professional Development ExCET and 19 participants would fail the Secondary Professional Development ExCET. Five hypotheses addressed the effect of raising the TASP Reading score to 250. Findings of four hypotheses showed that raising this admission standard would impact the number of individuals of color granted admission to the teacher preparation program. These results call for the recommendation that governing agencies address the impact of state teacher education program accreditation that often results in the policy of relying on the TASP Reading score as one of the primary admission standards for teacher education programs. The unintended outcome of raising the reading admission standard in the anticipation of continued state accreditation is a noticeable loss of candidates of colors, especially African American candidates. digital.library.unt.edu/ark:/67531/metadc2832/
Use of GIS to Identify and Delineate Areas of Fluoride, Sulfate, Chloride, and Nitrate Levels in the Woodbine Aquifer, North Central Texas, in the 1950s, 1960s, 1970s, 1980s, and 1990s
ArcView and ArcInfo were used to identify and delineate areas contaminated by fluoride, sulfate, chloride, and nitrate in the Woodbine Aquifer. Water analysis data were obtained from the TWDB from the 1950s to 1990s covering 9 counties. 1990s land use data were obtained to determine the relationship with each contaminant. Spearman's rank correlation coefficients and Kruskal-Wallis tests were used to calculate relationships between variables. Land uses had little effect on distributions of contaminants. Sulfate and fluoride levels were most problematic in the aquifer. Depth and lithology controlled the distributions of each contaminant. Nitrate patterns were controlled mainly by land use rather than geology, but were below the maximum contaminant level. In general, contaminant concentrations have decreased since the 1950s. digital.library.unt.edu/ark:/67531/metadc2869/
The use of notated and aural exercises as pedagogical procedures intended to develop harmonic accuracy among beginning jazz improvisers
This study compared the effects from the use of aural and notated exercises as pedagogical procedures for teaching harmonic accuracy to beginning jazz improvisation students. The methods of pedagogy were identified from published pedagogic and historical sources, the results of oral and written traditions of jazz pedagogy. The performance objective was produced from a review of the related literature as a recognized and measurable characteristic of jazz improvisation. The purpose of this study was to compare measurements of harmonic accuracy, following the use of notated and aural exercises as experimental procedures of jazz improvisation pedagogy. A lesson plan, materials, curriculum and outline were developed followed by student recruitment and participation. A total of 20 student volunteers participated in the methods of pedagogy (aural or notation). Data collection consisted of a musical background questionnaire and pre and posttest performance recordings. Student recordings were evaluated by six judges using the “experimental performance evaluation measure.” Statistical analyses were conducted, including comparisons of pre to posttest effects between, and among the methods of pedagogy. Although all student participants performed mostly from notated music prior to this study, students who received the aural method of pedagogy produced greater improvement for all measurement items. While the aural method produced no differences between grade level, the notation method produced significantly lower scores for 9th graders compared to 12th graders; no other significant grade level differences were noted. Conclusions were that although many sources of pedagogy do not include aural exercises as the predominate activity, beginning improvisers who have more experience reading music than playing by ear, learn better from aural, than notated exercises. digital.library.unt.edu/ark:/67531/metadc2886/
Variations of the Hand Test with young and older adults
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To explore the influence that variations in projective stimuli might have on the respondent's ability to identify with pictorial representations of hands derived from the Hand Test (Wagner, 1961, 1983), 61 young adults (M age = 23) and 60 older adults (M age = 73) were presented with four alternate versions of hand stimuli (young male, young female, old male, and old female) in addition to the original Hand Test. Results indicated main effects for age and gender of respondent, which were primarily consistent with previous Hand Test research. Main effects for gender and age of hand stimuli (p < .05) were also found. Significant interaction effects were revealed for age of respondent by age of hand stimuli and for age of respondent by gender of hand stimuli (p < .05). These interactions resulted in the elicitation of a variety of responses to a differentiated manner than a standard set of Hand Test stimuli. A gender of respondent by gender of hand stimuli interaction effect was also found (p &lt; .05), suggesting that gender alterations of the card may also be beneficial for increasing respondent identification for some individuals. Overall, the results of variations in Hand Test stimuli, as they interact with respondent personal characteristics, indicate the utility of alternate versions of the Hand Test. This is based on the assumption that the respondent will identify with the hand that best resembles his/her hands, resulting in the stimulus performing its projective function to a greater extent. digital.library.unt.edu/ark:/67531/metadc2833/
Where I am From, Finding My Identity Through Visualizing Memories
This article discusses about the author’s identity related to the experience of being in the United States for one third of his life, and away from his native country, Japan. He uses photographic images as a tool for finding his identity. Those images are combined and painted with paraffin wax as finished pieces. The extra layer of wax on the photographic surface is treated as a metaphor for the fuzziness of memories and dreams, as well as a boundary, which lies between author’s two familiar spaces, the United States and Japan. His visual influences are shown to include photographer Henri Cartier- Bresson, painter Giorgio de Chirico, and sculptor Alberto Giacometti. digital.library.unt.edu/ark:/67531/metadc5807/
4-Ethoxymethylphenol: a novel phytoestrogen that acts as an agonist for human estrogen receptors.
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Estrogen is the natural agonist of the estrogen receptor (ER). However, certain plant-derived compounds or phytoestrogens have been identified that mimic estrogens and act as agonists and/or antagonists of ERs, depending on subtype and target tissue. Understanding how phytoestrogens interact with ERs, and therefore effect the estrogenic response, may prove beneficial in hormone replacement therapy and in the prevention and treatment of hormone-related diseases. Using Thin Layer Chromatography, gas chromatography/mass spectrometry (GC/MS), and proton nuclear nagnetic resonance (HNMR), I identified 4-ethoxymethylphenol (4EM) found in Maclura pomifera. While most phytoestrogens are heterocyclic compounds, 4EM is a simple phenol that acts as an agonist of ER-alpha and -beta in HeLa and MCF-7 cells. To study the effect of 4EM on ER-alpha and -beta activity, I performed transient transfection assays and showed that 4EM activates ER dependent gene transcription in a dose dependent manner in both ER subtypes. Further, 4EM- mediated transcription in ER-alpha, like estrogen, was enhance in the presense of co-activators, SRC-1 (steroid receptor coactivator-1), CBP (CREB binding proteins), and E6-AP (E6-associated protein) and inhibited by trans-4- hydroxytamoxifen (4HT). I found that 4EM was specific for ER and did not activate transcription of the progesterone receptor in HeLa cells. digital.library.unt.edu/ark:/67531/metadc3003/
Accounting for human resources: Implications for theory and practice.
Knowledge workers are an important resource for the typical modern business firm, yet financial reporting ignores such resources. Some researchers contend that the accounting profession has stressed reliability in order to make the accounting appear objective. Others concur, noting that accounting is an insecure profession and adopts strict rules when faced with uncertainty. Accountants have promulgated a strict rule to expense human resource costs, although many know that such resources have future benefits. Some researchers suggest that any discipline must modify its language in order to initiate change toward providing useful social ameliorations. If accounting theorists extend this idea to the accounting lexicon.s description of investments in human resources, investors and other accounting user groups might gain greater insight into how a firm fosters and nourishes human capital. I tested three hypotheses related to this issue by administering an experiment designed to assess financial analysts. perceptions about alternative financial statement treatments of human resources in an investment recommendation task. I predicted that (1) analysts' perceptions of the reliability (relevance) of the information they received would decrease (increase) as the treatment of human resources increasingly violated GAAP (became more current-oriented), (2) analysts exposed to alternative accounting treatments would report a lower likelihood of recommending that their clients invest in the company in the task, and (3) financial analysts who ranked reliability (relevance) as a more important information quality would be less (more) likely to recommend that their clients buy the stock represented in the case because the treatment of human resources on the financial statements violated GAAP (was more current-oriented) as compared to analysts who ranked reliability (relevance) as being lower (higher) in importance. Analysts receiving financial statements with accounting treatments of human resource costs that violated GAAP judged such information as less reliable and were also less likely to recommend that their clients buy the stock in the task than analysts receiving financial statements that conformed to GAAP. Also, analysts who perceived reliability as a more important information quality reacted more negatively to a replacement cost approach to accounting for human resources than participants who perceived reliability as being less important. A potential confounding explanation of the results is the varied language used in the audit opinions included with the treatment financial statements. Whether explained by the audit opinion language or the actual differences contained in the financial statements, the results suggest that an important user group, financial analysts, may be subject to the aura of objectivity suggested by Porter in 1995. digital.library.unt.edu/ark:/67531/metadc3026/
An analysis of sales people's perceptions of performance appraisal criteria at a telecommunications corporation.
The purpose of this study was to identify and analyze sales people's perceptions of performance appraisal criteria in a telecommunications corporation. The study was prompted by the perceived disillusionment of the sales people with the current performance appraisal criteria. The perceptions of 67 sales people were assessed using a questionnaire developed by the researcher. One-way analysis of variance procedures (ANOVA) were used to determine if there were statistically significant differences in premise and telemarketing sales people's perceptions of performance appraisal criteria. Findings indicated that there were no statistically significant difference in premise and telemarketing sales people's perceptions of the 38 performance appraisal criteria statements. Findings did not indicate a statistically significant difference in premise and telemarketing sales people's perceptions of the performance criteria statements, the attitude or satisfaction statements, and the peripheral issue statements. Based on this study, the sales people appear to have clear perceptions of the performance appraisal criteria. digital.library.unt.edu/ark:/67531/metadc3051/
Attitudes of American and Korean early childhood educators regarding programs for gifted/talented young children.
The purpose of this research was to study the attitudes of Korean and American early childhood educators concerning gifted children and programs aimed specifically at meeting their needs. The study examined general attitudes towards giftedness and gifted education programs and factors that might affect those attitudes. The study also examined desirable environments for young gifted children. Twenty-item questionnaires were developed and logically divided into six sections (identification, teacher environment, classroom environment, parent environment, educational rights, and program). A systematic process of development, analysis, and refinement of the questionnaire was done. The questionnaires were given randomly to American educators attending the 1996 National Association for the Education of Young Children (NAEYC) conference. A random Korean sample included early childhood educators listed in the Korean Association for Early Childhood Education Directory (1995-1996) and the Korean Association for Child Care Directory (1995-1996). All subjects were members of one of three groups: (a) teacher educators, (b) teachers, and (c) administrators/directors. The surveys found agreement between Korean and American early childhood educators on the importance of knowing the strengths of individual gifted children, the need to stimulate higher order thinking skills, the rights of gifted children to an appropriate education, a perception of more work for the teacher to add these options, and a feeling that gifted programs would be difficult because of the large number of children in classes. The teachers also agreed that it is not difficult to assess or identify gifted preschoolers and having programs for the gifted is not elitist, but that parents should have the main responsibility for meeting the needs of gifted preschoolers and that many gifted strategies are good for all children. digital.library.unt.edu/ark:/67531/metadc3029/
Borel Determinacy and Metamathematics
Borel determinacy states that if G(T;X) is a game and X is Borel, then G(T;X) is determined. Proved by Martin in 1975, Borel determinacy is a theorem of ZFC set theory, and is, in fact, the best determinacy result in ZFC. However, the proof uses sets of high set theoretic type (N1 many power sets of ω). Friedman proved in 1971 that these sets are necessary by showing that the Axiom of Replacement is necessary for any proof of Borel Determinacy. To prove this, Friedman produces a model of ZC and a Borel set of Turing degrees that neither contains nor omits a cone; so by another theorem of Martin, Borel Determinacy is not a theorem of ZC. This paper contains three main sections: Martin's proof of Borel Determinacy; a simpler example of Friedman's result, namely, (in ZFC) a coanalytic set of Turing degrees that neither contains nor omits a cone; and finally, the Friedman result. digital.library.unt.edu/ark:/67531/metadc3061/
The characteristics of teacher-directed modeling evidenced in the practices of three experienced high school choral directors.
The purpose of this study was to analyze the characteristics of teacher directed modeling evidenced in the practices of three experienced high school choral directors. Research questions were: 1. What modeling activities were exhibited in each teacher's rehearsals? 2. When viewing a 45-minute composite tape of each teacher's instructional activities representative of all rehearsals, what instructional behaviors did each choral director recognize and identify as modeling? 3. What instructional episodes on the composite tape not identified by the teachers contained elements of modeling? 4. What other episodes from the remainder of each choral director's rehearsal practice contributed to an understanding of modeling? Videotapes of three high school choral directors were recorded over the course of one semester. Excerpts from rehearsals were combined to form a 45-minute composite tape of each choral director. A text transcription was made of the composite tape. Participant directors viewed their tape and identified instructional episodes that they recognized as examples of modeling. Identifications were analyzed, and descriptive categories of modeling behaviors were established. Modeling was found to be a teacher generated or delegated act of demonstration. Demonstrations were musical or non-musical and belonging to either of three distinct categories: audible, visible, or process modeling. Subdivisions of each category were found further describing modeling in the high school choral rehearsal. In addition, types of modeling were noted in increasing cognitive complexity required on the part of students beginning with simple imitation and concluding with models as tools for musical problem solving. Research is recommended on a larger sample of participants, including junior high/middle school directors to confirm categories and levels and to develop an observation tool based on results for describing, assessing, and modifying instructional techniques of practicing and pre-service music educators. digital.library.unt.edu/ark:/67531/metadc3053/
Characterization of Moraxella bovis Aspartate Transcarbamoylase
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Aspartate transcarbamoylase (ATCase) catalyzes the first committed step in the pyrimidine biosynthetic pathway. Bacterial ATCases have been divided into three classes, class A, B, and C, based on their molecular weight, holoenzyme architecture, and enzyme kinetics. Moraxella bovis is a fastidious organism, the etiologic agent of infectious bovine keratoconjunctivitis (IBK). The M. bovis ATCase was purified and characterized for the first time. It is a class A enzyme with a molecular mass of 480 to 520 kDa. It has a pH optimum of 9.5 and is stable at high temperatures. The ATCase holoenzyme is inhibited by CTP > ATP > UTP. The Km for aspartate is 1.8 mM and the Vmax 1.04 µmol per min, where the Km for carbamoylphosphate is 1.05 mM and the Vmax 1.74 µmol per min. digital.library.unt.edu/ark:/67531/metadc3012/
Characterization of the aspartate transcarbamoylase (ATC2) that is found in the pyrBC’ complex of Bordetella pertussis
An aspartate transcarbamoylase (ATCase) gene from Bordetella pertussis was amplified by PCR and ligated into pT-ADV for expression in Escherichia coli. This particular ATCase (pyrB) was an inactive gene found adjacent to an inactive dihydroorotase (DHOase) gene (pyrC'). This experiment was undertaken to determine whether this pyrB gene was capable of expression alone or if it was capable of expression only when cotransformed with a functional pyrC'. When transformed into E. coli TB2 pyrB-, the gene did not produce any ATCase activity. The gene was then co-transformed into E. coli TB2 pyrB- along with a plasmid containing the pyrC' gene from Pseudomonas aeruginosa and assayed for ATCase activity. Negative results were again recorded. digital.library.unt.edu/ark:/67531/metadc3057/
Characterizaton of Triethoxyfluorosilane and Tetraethoxysilane Based Aerogels
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Aerogels are highly porous, low dielectric constant (low k) materials being considered by the semiconductor industry as an interlayer dielectric. Low k materials are needed to overcome capacitance problems that limit device feature sizes. Precursors triethoxyfluorosilane (TEFS) and tetraethoxysilane (TEOS) were used to prepare bulk aerogels. Samples were prepared by sol-gel methods, and then carbon dioxide supercritically-dried. Effects of varying the water to precursor ratio were studied with respect to aerogel properties and microstructure. Methods of analysis for this study include FTIR-ATR, TEM, RBS, EDS, SEM, dielectric constant determination by impedance and surface area by gas adsorption. Si-F bonds were determined to be present in both acid- and base-catalyzed TEFS as well as HF-catalyzed TEOS. Fluorine promotes a fractal network microstructure as opposed to a particle-like microstructure. Surface area and dielectric constant were determined to increase slightly with increases in the water to precursor ratio. digital.library.unt.edu/ark:/67531/metadc2999/
Combat Reconsidered: A Statistical Analysis of Small-Unit Actions During the American Civil War
Historians often emphasize the physical features of battleterrain, weaponry, troop formations, earthworks, etc.in assessments of Civil War combat. Most scholars agree that these external combat conditions strongly influenced battle performance. Other historians accentuate the ways in which the mental stresses of soldiering affected combat performance. These scholars tend to agree that fighting effectiveness was influenced by such non-physical combat conditions as unit cohesion, leadership, morale, and emotional stress. Few authors argue that combat's mental influences were more significant in determining success or failure than the physical features of the battlefield. Statistical analysis of the 465 tactical engagements fought by twenty-seven Federal regiments in the First Division of the Army of the Potomac's Second Corps throughout the American Civil War suggests that the mental aspects of battle affected fighting efficiency at least as muchand probably more thancombat's physical characteristics. In other words, the soldiers' attitudes, opinions, and emotions had a somewhat stronger impact on combat performance than their actions, positions, and weaponry. digital.library.unt.edu/ark:/67531/metadc3066/
Comparative morphology of sensilla styloconica on the proboscis of North American Nymphalidae and other selected taxa (Lepidoptera): systematic and ecological considerations.
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Sensilla styloconica on the proboscis of 107 species of North American and tropical butterflies were comparatively studied using the scanning electron microscope. Focus was on 76 species of North American Nymphalidae representing 45 genera and 11 subfamilies. Nomenclature for generalized and specific types of nymphalid sensilla is proposed. Written descriptions and micrographs are presented for each species studied. Morphological features were generally consistent for all or most species within genera and sometimes within subfamilies, with specified exceptions. Statistical analysis revealed significant differences for six of eight variables tested between two distinct feeding guilds of North American Nymphalidae. Average number, density, extent of proboscis coverage with sensilla, their total length, and shoulder spine length were all significantly greater in the non-nectar feeding guild than in nectar feeders, and may indicate adaptation for greater efficiency in feeding on flat surfaces. The greater frequency of apical shoulder spines in non-nectar feeders may represent adaptation for protection of sensory pegs from mechanical abrasion during feeding, or for anchoring the flexible proboscis tip to the surface. Correlation analysis revealed 9 out of 28 positive correlations in nectar feeders and 5 out of 28 in non-nectar feeders. Results of preliminary cladistic analysis were not considered to be meaningfully robust due to few available characters. The stylar characters identified in this study should be more useful in future analyses when included with characters from other lines of evidence. The presence of sensilla styloconica in all subfamilies of Nymphalidae, except Danainae, largely supports Ehrlich's (1958) higher classification concept for the family. The presence of less conspicuous sensilla in the Danainae, and other characteristics are presented as further evidence that they should be reconsidered for full family status. Sensilla styloconica in nymphalid butterflies appear to function as extensions that provide greater sensory reach during feeding. The role of these sensilla in liquid uptake, pollen feeding, and host plant selection is discussed. digital.library.unt.edu/ark:/67531/metadc3002/
Constructed images: The influences of news organizations and socialization in photojournalism
Media sociologists have produced much research on the systems of production of media content. Photojournalism, however, largely has been ignored in these studies. This paper presents the findings of an ethnographic study of work routines and photojournalism practices at three newspapers. The study explored the extent to which routines and practices are affected by professional norms and values and organizational needs and beliefs. The study also explored how these factors influence the content and aesthetic qualities of newspaper photographs. Findings suggest that photo editors and photojournalists operate under many of the same constraints as other media workers. The findings also show that photojournalists are socialized to newspapers. expectations by fellow photographers and photo editors. To gauge professional accomplishments, photojournalists rely on peers, professional organizations and competitions. digital.library.unt.edu/ark:/67531/metadc3064/
Death and ethnicity: A psychocultural study - twenty-five years later.
his study compares ethnic, age, and gender differences concerning attitudes and behaviors toward death, dying, and bereavement among Caucasian, African, Hispanic, and Asian American adult participants in north Texas with the results of a 1976 study by Kalish and Reynolds on death attitudes and behaviors of Caucasian, African, Mexican, and Japanese American adult participants in Los Angeles, California. A modified version of Kalish and Reynolds' study questionnaire was administered to 526 respondents (164 Caucasian, 100 African, 205 Hispanic, and 57 Asian Americans) recruited from community and church groups. Findings of this study were compared with those of Kalish and Reynolds in specific areas, including experience with death, attitudes toward one's own death, dying, and afterlife, and attitudes toward the dying, death, or grief of someone else. Data was analyzed employing the same statistical tools as those used by Kalish and Reynolds, i.e., chi square calculations, frequencies, percentages, averages, and analyses of variance. As compared with the earlier study, results indicated that this study's participants were less likely to have known as many persons who had died recently or to state they would try very hard to control grief emotions in public. Present study participants were more likely to have visited dying persons, to want to be informed if they were dying and believe that others should be informed when dying, to prefer to die at home, to have made arrangements to donate their bodies or body parts to medicine, to have seriously talked with others about their future deaths, to consider the appropriateness of mourning practices and the comparative tragedy of age of death from a relative standpoint, and to want to spend the final six months of their lives showing concern for others. Between study differences were found in ethnic group, age group, and gender group comparisons. Within study differences in death and dying attitudes were also found in this study among ethnic, age, and gender groups. digital.library.unt.edu/ark:/67531/metadc3036/
A descriptive study of accredited counseling programs.
The Council for Accreditation of Counseling and Related Education Programs (CACREP) is the accrediting body for the field of counselor education. Since the inception of the standards, several individuals have published journal articles reviewing the strengths and weaknesses of CACREP accreditation. The purpose of this study was to do a preliminary survey of the opinions of individuals within CACREP accredited programs to discover the effects of accreditation on programs. The survey of opinions from respondent CACREP accredited programs indicated interesting results. The eleven frequently held beliefs about improvements after accreditation was substantiated by the number, the percentage, and the Chi Square results from respondent programs. Therefore, after CACREP accreditation, most programs reported the opinion that: students have higher grade point averages and test scores; students are younger, learn better, and receive more employment opportunities; a higher percentage of students pass the licensed professional counselor examination; average scores are higher on the nationally certified counselor examination; programs receive more applicants and faculty is more professionally active, publishes more, and presents more. The second part of the survey indicated that a large percentage of respondent programs offer courses beyond the CACREP core curriculum experiences (91%) and that a variety of courses are offered (78 courses). In addition, 91 respondent programs indicated that courses are required beyond the CACREP core curriculum experiences and that a variety of courses are required (29 courses). Three primary limitations exist in this study. First, the eleven frequently held beliefs were marked by the opinion of one faculty member for each program. Second, the number of blanks for each item was frequently close to or sometimes exceeded the number of respondents who marked the after CACREP column. Third, the survey data collected on courses that were offered by programs beyond the core were based upon memory and/or opinion and may be inaccurate. A recommendation for future research would be to study the hard data collected prior to and after accreditation. digital.library.unt.edu/ark:/67531/metadc3063/
Development of a Pre-Impact Environmental Site Characterization for the Bryan Mound, Texas Strategic Petroleum Reserve
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This thesis presents a model for developing site-specific contingency plans to be used during spill response, remediation, and post-spill monitoring using the Strategic Petroleum Reserve's Bryan Mound site as a case study. Bird and vegetation observations provide baseline data for biological conditions, and sediment sampling for total petroleum hydrocarbons serves as a chemical component of the model. Results demonstrate previously unknown conditions that would hinder remediation and affect the persistence of petroleum contaminants. Results also established previously unmapped dominant bird and vegetation types likely to be impacted by a spill at the site. This model points to a reconsideration of individual facilities' responsibilities when planning for large-scale disasters and protecting the sensitive ecosystems surrounding their sites. digital.library.unt.edu/ark:/67531/metadc3013/
Dynamic Resource Management in RSVP- Controlled Unicast Networks
Resources are said to be fragmented in the network when they are available in non-contiguous blocks, and calls are dropped as they may not end sufficient resources. Hence, available resources may remain unutilized. In this thesis, the effect of resource fragmentation (RF) on RSVP-controlled networks was studied and new algorithms were proposed to reduce the effect of RF. In order to minimize the effect of RF, resources in the network are dynamically redistributed on different paths to make them available in contiguous blocks. Extra protocol messages are introduced to facilitate resource redistribution in the network. The Dynamic Resource Redistribution (DRR) algorithm when used in conjunction with RSVP, not only increased the number of calls accommodated into the network but also increased the overall resource utilization of the network. Issues such as how many resources need to be redistributed and of which call(s), and how these choices affect the redistribution process were investigated. Further, various simulation experiments were conducted to study the performance of the DRR algorithm on different network topologies with varying traffic characteristics. digital.library.unt.edu/ark:/67531/metadc3048/
An E-government Readiness Model
The purpose of this study is to develop an e-government readiness model and to test this model. Consistent with this model several instruments, IS assessment (ISA), IT governance (ITG), and Organization-IS alignment (IS-ALIGN) are examined for their ability to measure the readiness of one organization for e-government and to test the instruments fit in the proposed e-government model. The ISA instrument used is the result of adapting and combining the IS-SERVQUAL instrument proposed by Van Dyke, Kappelman, and Pybutok (1997), and the IS-SUCCESS instrument developed by Kappelman and Chong (2001) for the City of Denton (COD) project at UNT. The IS Success Model was first proposed by DeLone and McLean (1992), but they did not validate this model. The ITG instrument was based on the goals of the COD project for IT governance and was developed by Sanchez and Kappelman (2001) from UNT. The ISALIGN instrument was also developed by Sanchez and Kappelman (2001) for the COD project. It is an instrument based on the Malcolm Baldrige National Quality Award (MBNQA) that measures how effectively a government organization utilizes IT to support its various objectives. The EGOV instrument was adapted from the study of the Action-Audience Model developed by Koh and Balthazrd (1997) to measure how well a government organization is prepared to usher in e-government in terms of various success factors at planning, system and data levels. An on-line survey was conducted with employees of the City of Denton, Texas. An invitation letter to participate in the survey was sent to the 1100 employees of the City of Denton via email, 339 responses were received, yielding a response rate of 31%. About 168 responses were discarded because they were incomplete and had the missing values, leaving 171 usable surveys, for a usable set of responses that had a response rate of 16%. Although the proposed and some alternate models were partially consistent with the hypothesized theory, the confirmation of the relationships among the constructs warrants further research via either by replication of this research or by development a new theoretical model. However, the significant validity and reliability measures obtained in this study indicate that the e-government readiness model has the potential for use in future studies. digital.library.unt.edu/ark:/67531/metadc3042/