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Synthesis and Characterization of Crystalline Assemblies of Functionalized Hydrogel Nanoparticles

Description: Two series monodispersed nanoparticles of hydroxylpropyl cellulose (HPC) and functionalized poly-N-isopropylamide (PNIPAM) particles have been synthesized and used as building blocks for creating three-dimensional networks, with two levels of structural hierarchy. The first level is HPC nanoparticles were made from methacrylated or degradable cross-linker attached HPC. These nanoparticles could be stabilized at room temperature by residual methacrylate or degradable groups are present both within and on the exterior of HPC nanoparticles. Controlled release studies have been performed on the particle and networks .The nearly monodispersed nanoparticles have been synthesized on the basis of a natural polymer of hydropropylcellulose (HPC) with a high molecular weight using the precipitation polymerization method and self-assembly of these particles in water results in bright colors. The HPC nanoparticles can be potential using as crosslinkers to increase the hydrogels mechanical properties, such as high transparency and rapid swelling/de-swelling kinetics. The central idea is to prepare colloidal particles containing C=C bonds and to use them as monomers - vinylparticles, to form stable particle assemblies with various architectures. This is accomplished by mixing an aqueous suspension of hydrogel nanoparticles (PNIPAM-co-allylamine) with the organic solvent (dichloromethane) to grow columnar crystals. The hydrogels with such a unique crystal structure behavior not only like the hydrogel opals, but also have a unique property: anisotropy.
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Date: December 2005
Creator: Cai, Tong
Partner: UNT Libraries

Aesthetic Models and Structural Features in Concerto for Solo Percussion and Concert Band

Description: Concerto for Solo Percussion and Concert Band was commissioned by Staff Sergeant Rone Sparrow, a percussionist with the West Point Military Academy Band. Funding for the project was provided by the Barlow Foundation. The piece was premiered April 13, 2005 in the Eisenhower Hall Theater at West Point, New York. Rone Sparrow performed with the USMA band, and Colonel Thomas Rotondi Jr., Commander/Conductor, conducted the piece. The concerto consists of three movements, and each movement features a different instrument: the first features marimba, the second, vibraphone, and the third movement features the drum kit together with a rhythm section (piano, bass, and drums). In addition to the piece, the dissertation paper discusses important technical detail related to the piece, including: harmony, form, rhythm, programmatic ideas as they relate to motivic strands, and the process of generating and discarding material. The paper also focuses on a number of factors that were influential to the piece, such as postmodern philosophy.
Date: December 2005
Creator: Anderson, Stephen Reg
Partner: UNT Libraries

The Effect of SFAS No. 141 and SFAS No. 142 on the Accuracy of Financial Analysts' Earnings Forecasts after Mergers

Description: This study examines the impact of Statements of Financial Accounting Standards No. 141 and No. 142 (hereafter SFAS 141, 142) on the characteristics of financial analysts' earnings forecasts after mergers. Specifically, I predict lower forecast errors for firms that experienced mergers after the enactment of SFAS 141, 142 than for firms that went through business combinations before those accounting changes. Study results present strong evidence that earnings forecast errors for companies involved in merging and acquisition activity decreased after the adoption of SFAS 141, 142. Test results also suggest that lower earnings forecast errors are attributable to factors specific to merging companies such as SFAS 141, 142 but not common to merging and non-merging companies. In addition, evidence implies that information in corporate annual reports of merging companies plays the critical role in this decrease of earnings forecast error. Summarily, I report that SFAS 141, 142 were effective in achieving greater transparency of financial reporting after mergers. In my complementary analysis, I also document the structure of corporate analysts' coverage in "leaders/followers" terms and conduct tests for differences in this structure: (1) across post-SFAS 141,142/pre-SFAS 141, 142 environments, and (2) between merging and non-merging firms. Although I do not identify any significant differences in coverage structure across environments, my findings suggest that lead analysts are not as accurate as followers when predicting earnings for firms actively involved in mergers. I also detect a significant interaction between the SFAS-environment code and leader/follower classification, which indicates greater improvement of lead analyst forecast accuracy in the post-SFAS 141, 142 environment relative to their followers. This interesting discovery demands future investigation and confirms the importance of financial reporting transparency for the accounting treatment of business combinations.
Date: May 2005
Creator: Mintchik, Natalia Maksimovna
Partner: UNT Libraries

A Hint of Meaning

Description: A Hint of Meaning contains a scholarly preface, "Language, Experimentation, and Craft: Creating a Vivid, Continuous Fictional Dream," that discusses the ambiguities of language and how they relate to different aspects of the craft of writing. Six original short stories follow the preface. "Musical Chairs" explores a woman's conflicting emotions about her ex-husband. "Baby Steps" depicts the struggle of a woman against her father's alcoholism. "Go Home Happy" depicts a day in the life of a video store employee. "Bargain Basement Perfection" contrasts the reality of a relationship with an imagined, perfect relationship. "Did You Hear about Donald and Bitsy?" is an experimental piece that tells a story through gossip. "Glass Angels" explores a minister's relationship with his homosexual son and how that relates to the minister's faith.
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Date: May 2005
Creator: Kinch, Erin Brinkman
Partner: UNT Libraries

Documentary Film: I Named Her Angel

Description: Recent political developments in the world show us that different cultures need to know and understand each other better. Even though technological developments like the Internet, satellites, cable television and conglomeration of big media entities have made mass communication more effective and faster, we cannot easily say that these developments help to bring world cultures together. As a result, mass audiences are not very much able to see what few productions do speak to these issues in a constructive manner. The main aim of this documentary film project is to serve as a small step towards helping different cultures to understand each other better. This documentary film conveys the basics of Mevlevism by following the formal gatherings of a Mevlevi den in Istanbul, Turkey. A den or tekke is a place where Islamic people gather and perform their religious activities. During these gatherings they do the sema, they pray, they listen to music, and they discuss spiritual matters. Sema is the entire ritual they perform as part of their ceremonies including listening to music, singing and chanting to attain a state of religious emotion and ecstasy or vecd. The documentary film is structured around a twelve year old girl, Elif, who is learning the basics of Mevlevism. The interviews conducted with regulars from the den explain to the audience why people are attracted to this belief system. Filming the ceremonies at the 550-year-old Mevlevi temple in Galata, Istanbul accentuates the historic background of this belief system. The Night of Reunion is the day in which Mevlevis celebrate the passing of Mevlana Celaleddin Rumi, the founder of Mevlevism and provides the climax of the film. Elif performs on that night, a very important moment in her spiritual life.
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Date: May 2005
Creator: Dinc, Nefin
Partner: UNT Libraries

The Effects of Motivational and Instructional Self Talk on the Attentional Focus of High School Distance Runners.

Description: The purposes of this study were to examine the (a) attentional focus strategies used by high school distance runners, (b) changes in attentional focus across four laps in three 1.6 km runs, and (c) effects of a pre-performance intervention using motivational and instructional self talk on the attentional focus strategies used by and performance of high school distance runners. Participants (N = 42) completed a background and demographic questionnaire, the Cross Country Attentional Focus Inventory (CCAFI), a motivational and instructional statement survey, and the Self-Motivation Inventory. A series of oneway ANOVAs revealed significant differences in the types of attentional strategies used by each group, as well as fluctuations in use of strategies. The experimental group associated more during the each of the 1.6 km trials, whereas the control group dissociated more throughout each trial. A significant group by week interaction was found, with the experimental group maintaining their performance and the control group slowing from week one to week three.
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Date: May 2005
Creator: Burgess, Amber G.
Partner: UNT Libraries

A two-year college typology for the 21st century: Updating and utilizing the Katsinas-Lacey classification system.

Description: This study had two primary purposes. The first goal was to bring the 1993/1996 Katsinas-Lacey two-year college classification system into the 21st century using data from the 2000 United States Census and the National Center for Education Statistics' Integrated Postsecondary Educational Data System (IPEDS) surveys for the 2000-2001 and 2001-2002 academic years. The second goal was to create a descriptive portrait of the universe of two-year, publicly controlled institutions that primarily offer the associate's degree mapped against the updated classification system and to describe and discern similarities and differences within this particular population by class and subclass in terms of multiple measurable characteristics for which IPEDS data were available. The study, based upon classification theory utilized in social science and management sciences - particularly the work of Bailey and McKelvey - assessed the efficacy of a number of other recent proposed community college classification systems, the original Katsinas-Lacey system and the revised version of Katsinas-Lacey created through the current research. It found both the original Katsinas-Lacey system and the revised version to meet the criteria for a well-made classification model. The study includes directories of all colleges and universities in the United States that offer the associate's degree with geographic, census population data, number of campuses and 2000-2001 unduplicated enrollment data for publicly controlled, two-year colleges and districts. Also included are data tables illustrating similarities and differences between colleges and districts in the three major classes and seven subclasses of publicly controlled institutions drawn from IPEDS survey data and detailed profiles of each of these institutional types - Rural, Rural Small, Rural Medium, Rural Large, Suburban, Suburban Single Campus, Suburban Multi-Campus, Urban, Urban Single Campus, and Urban Multi-Campus. The study concludes with a review of implications for policy and practice, and 25 recommendations for further research related to the revised ...
Date: May 2005
Creator: Hardy, David Earl
Partner: UNT Libraries

Validation of clinical screens for suicidality and severe mental disorders for jail inmates.

Description: Psychologists and other mental health professionals working in correctional institutions bear the considerable responsibility for identifying, diagnosing, and treating mentally disordered inmates. The importance of these responsibilities has been recognized in recent years because of the burgeoning population of inmates in general and the higher numbers of inmates with mental illness in particular. Research has demonstrated that the screens currently used in correctional settings to identify mentally disordered and suicidal inmates are either unvalidated or generally ineffective. This study investigates the validity of different mental health screens in a jail population. Inmates from the Grayson County Jail were administered three screens: the Referral Decision Scale (RDS), Personality Assessment Screener (PAS), and the Mental Disability/Suicide Intake Screen (MDSIS). Criterion measures were the Schedule for Affective Disorders and Schizophrenia (SADS) for Axis I disorders and the Suicide Probability Scale (SPS) for suicidal ideation. Results indicate that each screen most effectively assessed one clinical domain: the RDS for psychosis, the MDSIS for suicidality, and the PAS for depression. Gender differences were observed in screen items most effective for classifying inmates by suicide risk level.
Date: May 2005
Creator: Harrison, Kimberly S.
Partner: UNT Libraries

Poetry and Patronage: Alessandro Scarlatti, The Accademia Degli Arcadia, and the Development of the Conversazione Cantata in Rome 1700-1710

Description: The special relationship of patrons, librettists, and composers, in the Accademia degli'Arcadia in Rome from 1700-1710 appears in Alessandro Scarlatti's settings of Antonio Ottoboni's cantata librettos in the anthology GB Lbm. Add. 34056. An examination of Arcadian cantatas and their texts reveals the nature of their audience, function, and their place within the historical development of the genre. The conversazione cantata did not exist outside of Rome and was popular for only a brief period in the early eighteenth century. Critical examination of primary sources, including minutes from the Arcadian Academy meetings as well as household documents regarding the Cardinals Ottoboni and Pamphili, Prince Ruspoli, and other noble families, sheds light on the culture of the Arcadian Academy and the cantata within it, broader study clarifies the individuality of the conversazione cantata within Rome, and closer study of the contribution of the greatest cantata composer 1700-1710, Alessandro Scarlatti.
Date: May 2005
Creator: Hale Harris, Kimberly Coulter
Partner: UNT Libraries

Character Education Programs and Student Suspension Rates from School: Do Character Education Programs Decrease Student Suspensions from Regular Instructional Public Elementary Schools in Texas?

Description: The purpose of this study was to determine if character education programs impact the suspension rates of students from regular instructional public elementary schools in Texas. The data was also examined to determine if the number of years since a school's implementation of a character education program has an impact on the effectiveness of the programs as measured by the suspension rates of students from school. Finally, the study sought to determine if the socio-economic status of the schools has an impact on the effectiveness of character education programs as measured by the student suspension rates. A random sample of 135 regular instructional public elementary schools in Texas was collected. The principal of each school completed a questionnaire that was used to sort schools into three groups: schools with "direct" character education programs, schools with "indirect" character education programs, and schools that have implemented no type of character education program. A two-year history of suspensions was obtained for each school. The data was analyzed using one-way and two-way ANOVAs. The results of the analyses indicated that the implementation of character education programs, no matter what type, did not produce statistically significant differences in student suspension rates from school. Furthermore, the data revealed that neither the number of years since the implementation of the character education programs nor the socio-economic status of the schools had an impact on the effectiveness of the character education programs as measured by the student suspension rates from school.
Date: May 2005
Creator: Grinage, Adam L.
Partner: UNT Libraries

Institutions and Drug Markets

Description: This thesis examines how drug policy and enforcement affect drug manufacturers. The approach taken is a comparative institutional analysis of cannabis and methamphetamine production. I focus on the effects of prohibition, privacy, and clandestine markets on producer behavior for these two drugs and the unintended consequences that result. I demonstrate that cannabis and methamphetamine producers both face substantial transaction costs and that producers alter their behavior to manage these transaction costs. I conclude that cannabis producers can adopt indoor, small-scale operations to hide their activity, which are capable of yielding continuous, high-potency crops. Methamphetamine producers also adopt small-scale, decentralized strategies, but commodity control increases their exposure and leads to greater overall transaction costs during the manufacturing process.
Date: May 2005
Creator: Haddock, Billy Dean
Partner: UNT Libraries

Perceived features and similarity of images: An investigation into their relationships and a test of Tversky's contrast model.

Description: The creation, storage, manipulation, and transmission of images have become less costly and more efficient. Consequently, the numbers of images and their users are growing rapidly. This poses challenges to those who organize and provide access to them. One of these challenges is similarity matching. Most current content-based image retrieval (CBIR) systems which can extract only low-level visual features such as color, shape, and texture, use similarity measures based on geometric models of similarity. However, most human similarity judgment data violate the metric axioms of these models. Tversky's (1977) contrast model, which defines similarity as a feature contrast task and equates the degree of similarity of two stimuli to a linear combination of their common and distinctive features, explains human similarity judgments much better than the geometric models. This study tested the contrast model as a conceptual framework to investigate the nature of the relationships between features and similarity of images as perceived by human judges. Data were collected from 150 participants who performed two tasks: an image description and a similarity judgment task. Qualitative methods (content analysis) and quantitative (correlational) methods were used to seek answers to four research questions related to the relationships between common and distinctive features and similarity judgments of images as well as measures of their common and distinctive features. Structural equation modeling, correlation analysis, and regression analysis confirmed the relationships between perceived features and similarity of objects hypothesized by Tversky (1977). Tversky's (1977) contrast model based upon a combination of two methods for measuring common and distinctive features, and two methods for measuring similarity produced statistically significant structural coefficients between the independent latent variables (common and distinctive features) and the dependent latent variable (similarity). This model fit the data well for a sample of 30 (435 pairs of) images and 150 participants (χ2 =16.97, ...
Date: May 2005
Creator: Rorissa, Abebe
Partner: UNT Libraries

The school reform movement and high stakes standardized testing: An analysis of factors impacting the academic outcomes of students receiving special education services.

Description: The purpose of this study was to investigate special education outcomes in relation to state standardized testing. It specifically sought to determine if a relationship existed between selected data from the Texas Academic Excellence Indicator System (AEIS) comparing district students receiving special education services TAAS scores with selected district demographic, fiscal, and special education data. The population for this study consisted of all 2001-2002 grades 3-8 and 10 public school students with the exception of charter schools, special-purpose statutory districts, and state-administered districts. The reading analysis incorporated data from 896 Texas school districts. The mathematics analysis used data from 914 school districts. Multiple linear hierarchical regression was chosen as the method for statistical analysis. Data was obtained from the Texas Education Agency (TEA) as a special data pull. For both the reading and mathematics analyses, wealth and ethnicity were statistically insignificant although ethnicity individually accounted for a large percentage of the variance for both the reading (20.3%) and mathematics (13.2%) scores as well as producing negative β weights. All other predictor variables produced varying degrees of statistical significance. Community type, socioeconomic status, instructional expenditures per students, and instructional expenditures per student receiving special education services also produced negative β weights. Two variables in this study, enrollment and the percentage of students receiving special education services tested, produced positive β weights, substantial squared structure coefficients, and positive Pearson correlation coefficients. Of these two predictors, the strongest overall positive predictor for students receiving special education services success on the grades 3-8 and 10 reading and mathematics TAAS exams was the percentage of students receiving special education services tested. These percentages produced the largest positive correlations with passing rates (reading r = .283, mathematics r = .219) and the second largest regression coefficients (reading β = .224, mathematics β = .202). They individually ...
Date: May 2005
Creator: Roach, Robert G.
Partner: UNT Libraries

The Effects of Bilingual Education on Reading Test Scores: Can Dual-immersion Support Literacy for All Students?

Description: Dual-immersion is a bilingual education method offered that places English as a first language (EFL) and English language learner (ELL) students in the same classroom to learn two languages at the same time. This study examines whether second language acquisition through dual-immersion supports literacy for both ELL and EFLS children over time. Students' scores on standardized tests (ITBS, TAKS, Logramos, Stanford 9, and Aprenda) were studied to assess the impact, if any, of dual-immersion instruction vs. regular/bilingual education on reading development. Scores from 2000 through 2004 were gathered and analyzed for students enrolled in a dual-immersion class which started in kindergarten in 2000. These scores were compared to scores of students enrolled in regular and bilingual education classrooms for the same amount of time at the same school to examine whether there was an effect for students in the dual-immersion class. It was found that no significant difference existed between the groups. All groups were performing at a passing level on the standardized tests. The dual-immersion class was performing as well as the regular education class on standardized tests in both English and Spanish.
Date: May 2005
Creator: Ridley, Natalie D.
Partner: UNT Libraries

The Impact of Predisposition Towards Group Work on Intention to Use a CSCW System

Description: Groupware packages are increasingly being used to support content delivery, class discussion, student to student and student to faculty interactions and group work on projects. This research focused on groupware packages that are used to support students who are located in different places, but who are assigned group projects as part of their coursework requirements. In many cases, students are being asked to use unfamiliar technologies that are very different from those that support personal productivity. For example, computer-assisted cooperative work (CSCW) technology is different from other more traditional, stand-alone software applications because it requires the user to interact with the computer as well as other users. However, familiarity with the technology is not the only requirement for successful completion of a group assigned project. For a group to be successful, it must also have a desire to work together on the project. If this pre-requisite is not present within the group, then the technology will only create additional communication and coordination barriers. How much of an impact does each of these factors have on the acceptance of CSCW technology? The significance of this study is threefold. First, this research contributed to how a user's predisposition toward group work affects their acceptance of CSCW technology. Second, it helped identify ways to overcome some of the obstacles associated with group work and the use of CSCW technology in an academic online environment. Finally, it helped identify early adopters of CSCW software and how these users can form the critical mass required to diffuse the technology. This dissertation reports the impact of predisposition toward group work and prior computer experience on the intention to use synchronous CSCW. It was found that predisposition toward group work was not only positively associated to perceived usefulness; it was also related to intention to use. It ...
Date: May 2005
Creator: Reyna, Josephine
Partner: UNT Libraries

Dynamics, Thermodynamic formalism and Perturbations of Transcendental Entire Functions of Finite Singular Type

Description: In this dissertation, we study the dynamics, fractal geometry and the topology of the Julia set of functions in the family H which is a set in the class S, the Speiser class of entire transcendental functions which have only finitely many singular values. One can think of a function from H as a generalized expanding function from the cosh family. We shall build a version of thermodynamic formalism for functions in H and we shall show among others, the existence and uniqueness of a conformal measure. Then we prove a Bowen's type formula, i.e. we show that the Hausdorff dimension of the set of returning points, is the unique zero of the pressure function. We shall also study conjugacies in the family H, perturbation of functions in the family and related dynamical properties. We define Perron-Frobenius operators for some functions naturally associated with functions in the family H and then, using fundamental properties of these operators, we shall prove the important result that the Hausdorff dimension of the subset of returning points depends analytically on the parameter taken from a small open subset of the n-dimensional parameter space.
Date: May 2005
Creator: Coiculescu, Ion
Partner: UNT Libraries

Amon Carter: The Founder of Modern Fort Worth, 1930-1955

Description: From 1930 to 1955, Amon Carter, publisher of the Fort Worth Star-Telegram, exerted his power to create modern Fort Worth. Carter used his stature as the publisher of the city's major newspaper to build a modern city out of this livestock center. Between 1930 and 1955, Carter lobbied successfully for New Deal funds for Fort Worth, persuaded Consolidated Aircraft to build an airplane plant in the city, and convinced Burlington Railways to stay in the city. He also labored unsuccessfully to have the Trinity River Canal built and to secure a General Motors plant for Fort Worth. These efforts demonstrate that Carter was indeed the founder of modern Fort Worth.
Date: May 2005
Creator: Cervantez, Brian
Partner: UNT Libraries

RevealingReveilingReveling

Description: This thesis explores the possibilities of communication in the context of a sound composition. In RevealingReveilingReveling, a series of questions concerning communication posed by John Cage, coupled with an extension of those questions posed by myself, are set to recorded sounds-in-the-world. The intention is to create a greater awareness of that which there is to listen in our world. The first part of this essay discusses influences of philosophical thought during the process of composing RevealingReveilingReveling. Two distinct twentieth-century thinkers that have impacted the creation of this piece and their areas of thought are Martin Heidegger: language and Being; and John Cage: sound, silence, and awareness. The second part of the essay is a structural analysis of the piece, discussing the recording of Cage's questions, sounds-in-the-world, sound-manipulation techniques and thought-processes, as well as periodic mention the aesthetic decisions made.
Date: May 2005
Creator: Colaruotolo, John
Partner: UNT Libraries

Treatment Outcomes Related to EEG-Biofeedback for Chemical Dependency: Changes in MMPI-2™ (University of Minnesota) Personality Measures and Long Term Abstinence Rates

Description: Peniston and Kulkosky (1989, 1990) demonstrated the effectiveness of alpha-theta EEG-Biofeedback (EEG-BFB) in treating inpatient alcoholics noting significant improvements in depression, psychopathology, serum β-endorphin levels, and abstinence rates. The present study is an extension of a previously unpublished replication of the Peniston EEG-BFB protocol with 20 chemically dependent outpatients (Bodenhamer-Davis, Callaway, & DeBeus, 2002). Fifteen subjects were "high risk for re-arrest" probationers. Data for the EEG-BFB group was collected from archival records. Subjects completed an average of 39 sessions (SD = 6.096), with 33 of those being EEG-BFB. Pre/post-treatment MMPI-2s™ (University of Minnesota) were collected and follow-up (4-11 years) data obtained (abstinence rates, re-arrests in some cases). Treatment effects were evaluated by comparing assessment data (pre/post) and documenting abstinence rates. Post-treatment MMPI-2 results were within normal limits, with several scales significantly reduced from baseline suggesting less psychopathology. Results were then compared to 20 subjects receiving standard addiction treatment (OT-CD group), but not EEG-BFB. OT-CD subjects completed a 2-week inpatient program followed by 18 outpatient sessions. Pre/post assessment and follow-up data was collected on the OT-CD group. The OT-CD group's post-assessment results showed three elevations (MMPI-2 scales 4/6/8), suggestive of characteriological problems. Post-MMPI-2 results of the two groups were compared via ANCOVAs. Findings indicated no significant differences between groups on targeted scales; however, there was a trend for the EEG-BFB group to have lower scores. Follow-up data was obtained on 13 EEG-BFB subjects. Results indicated 92% (n = 12) were sober, with 8% (n = 1) claiming significantly reduced alcohol intake. Probationer re-arrest and revocation rates were collected on the subset of probationers (n = 14 out of 15). The majority of the probationers (79%, n = 11) had not been re-arrested nor had their probation been revoked. Short-term follow-up information (35-131 days post-assessment), available at the time of writing, for ...
Date: May 2005
Creator: Callaway, Tonya Gayle
Partner: UNT Libraries

The Constitutionality of Dress Code and Uniform Policies

Description: This dissertation proposes to delineate the criteria for determining the constitutionality of public school dress codes based on an examination of relevant case law. The study addresses the following underlying questions: (1) Do students have a constitutional right to freedom of choice regarding their personal dress and grooming in public schools? (2) If so, what is the origin of the right? (3) What justification does a school district need in order to intrude upon the right? (4) Does the extent to which there is a right, and that it is accorded support by the judiciary, depend on the student's age and grade level? (5) What do state statutes say about dress codes and uniforms? (6) Do state statutes comport with the circuit courts' rulings in the various jurisdictions? The first part of Chapter I examines the purpose of school uniforms as set forth in relevant educational literature and commentary. The second part of the chapter examines empirical evidence on the effects of dress codes and uniforms. Chapter II addresses the first three questions listed above concerning students' right to choice in personal dress, the origins of such a right, and the justification required for a school to intrude upon this right. Chapter III examines dress code rulings from the United States Courts of Appeals in order to ascertain patterns of judicial rationale and determine whether students' rights vary depending on age, grade level, or federal circuit court jurisdiction. Chapter IV examines existing state statutes with regard to dress codes and uniforms. Chapter V utilizes the legal principles that emerge from the research in Chapter III and draws from the survey of state statutes in Chapter IV to make a comparison of state statutes and circuit court rulings in each jurisdiction. If a state statute does not comport with federal law ...
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Date: May 2005
Creator: Stromberger, Joanne
Partner: UNT Libraries

The Effect of an Electronic Evaluation Questionnaire Format on the Return Rate From Field Supervisors.

Description: The purpose of this study was to examine the usefulness of electronic-based questionnaires as a tool to gather data from field supervisors in the medical profession at various military bases. The study compared the response effects of an electronic evaluation questionnaire with the traditional method of paper-based questionnaires in gathering Level 3 data. The number of returns affects the amount of information available to the course personnel in creating a viable program that ensures the success of service members entering the occupational field and, ultimately, affecting the number of service members who remain beyond their first enlistment. The return rate and amount of missing data were tracked. Supervisors of graduates of a medical program who had observed service members for a minimum of 4-months were participants in the study. The z-test for comparing two proportions was used to determine significance of the study at the .05 level. Findings indicate that there was a significant difference in return rates and the amount of missing data when using the electronic format. Based on this study, the electronic-based questionnaire as a data-gathering tool provided a higher number of returns in a quicker time frame with fewer missing data in the technical training environment. Copyright is held by the author, unless otherwise note
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Date: May 2005
Creator: Pineau, Deborah M.
Partner: UNT Libraries

FP-tree Based Spatial Co-location Pattern Mining

Description: A co-location pattern is a set of spatial features frequently located together in space. A frequent pattern is a set of items that frequently appears in a transaction database. Since its introduction, the paradigm of frequent pattern mining has undergone a shift from candidate generation-and-test based approaches to projection based approaches. Co-location patterns resemble frequent patterns in many aspects. However, the lack of transaction concept, which is crucial in frequent pattern mining, makes the similar shift of paradigm in co-location pattern mining very difficult. This thesis investigates a projection based co-location pattern mining paradigm. In particular, a FP-tree based co-location mining framework and an algorithm called FP-CM, for FP-tree based co-location miner, are proposed. It is proved that FP-CM is complete, correct, and only requires a small constant number of database scans. The experimental results show that FP-CM outperforms candidate generation-and-test based co-location miner by an order of magnitude.
Date: May 2005
Creator: Yu, Ping
Partner: UNT Libraries

Procedural content creation and technologies for 3D graphics applications and games.

Description: The recent transformation of consumer graphics (CG) cards into powerful 3D rendering processors is due in large measure to the success of game developers in delivering mass market entertainment software that feature highly immersive and captivating virtual environments. Despite this success, 3D CG application development is becoming increasingly handicapped by the inability of traditional content creation methods to keep up with the demand for content. The term content is used here to refer to any data operated on by application code that is meant for viewing, including 3D models, textures, animation sequences and maps or other data-intensive descriptions of virtual environments. Traditionally, content has been handcrafted by humans. A serious problem facing the interactive graphics software development community is how to increase the rate at which content can be produced to keep up with the increasingly rapid pace at which software for interactive applications can now be developed. Research addressing this problem centers around procedural content creation systems. By moving away from purely human content creation toward systems in which humans play a substantially less time-intensive but no less creative part in the process, procedural content creation opens new doors. From a qualitative standpoint, these types of systems will not rely less on human intervention but rather more since they will depend heavily on direction from a human in order to synthesize the desired content. This research draws heavily from the entertainment software domain but the research is broadly relevant to 3D graphics applications in general.
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Date: May 2005
Creator: Roden, Timothy E.
Partner: UNT Libraries

Charge Interaction Effects in Epoxy with Cation Exchanged Montmorillonite Clay and Carbon Nanotubes.

Description: The influence of charge heterogeneity in nanoparticles such as montmorillonite layered silicates (MLS) and hybrid systems of MLS + carbon nanotubes was investigated in cured and uncured epoxy. Epoxy nanocomposites made with cation-exchanged montmorillonite clay were found to form agglomerates near a critical concentration. Using differential scanning calorimetry it was determined that the mixing temperature of the epoxy + MLS mixture prior to the addition of the curing agent critically influenced the formation of the agglomerate. Cured epoxy samples showed evidence of the agglomerate being residual charge driven by maxima and minima in the concentration profiles of thermal conductivity and dielectric permittivity respectively. A hybrid nanocomposite of MLS and aniline functionalized multi walled nanotubes indicated no agglomerates. The influence of environmentally and process driven properties on the nanocomposites was investigated by examination of moisture, ultrasound, microwaves and mechanical fatigue on the properties of the hybrid systems. The results point to the importance of charge screening by adsorbed or reacted water and on nanoparticulates.
Date: May 2005
Creator: Butzloff, Peter Robert
Partner: UNT Libraries