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Investigating the effects on parallel play between siblings: Teaching children with autism to emit social phrases to their typically developing sibling. (open access)

Investigating the effects on parallel play between siblings: Teaching children with autism to emit social phrases to their typically developing sibling.

The focus of this study was three fold. First, modeling and feedback were investigated as a training package for social interactions between siblings. Second, the effects of social phrases taught to the sibling with autism were investigated. Third, the magnitude of these social phrases was measured by timing duration of parallel play. The experimental design is an A-B-A1-A2 design conducted in a clinic, with a probe for generalization in the home environment. This intervention was replicated across an additional sibling dyad to indicate its effectiveness. This study ascertained that the sibling with autism was a viable participant in learning new social skills that could function as a behavioral cusp and increase sibling interactions.
Date: December 2008
Creator: Hille, Katrina J.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Learner use of French second-person pronouns in synchronous electronic communication. (open access)

Learner use of French second-person pronouns in synchronous electronic communication.

This study analyzes students' use of the French second-person pronouns tu (T) and vous (V) in small-group (2-3 students) inter-learner online chat sessions. The influence of internal linguistic factors (i.e., turn type and morphosyntactic environment) on learners' appropriate vs. inappropriate use of these pronouns is considered. The study also investigates the influence of Instructional Level on tu-vous use and the extent to which students from different instructional levels provide various types of peer assistance (e.g., lexical, morphosyntactic, and sociolinguistic/pragmatic) . Pronoun use was extremely unstable for learners of all levels, and a Kruskal-Wallis analysis revealed that Instructional Level did not significantly affect appropriate T/V use overall. Instructional Level and Syntax did, however, significantly affect interrogative T/V use, as shown through multivariate analyses. Peer-assisted performance was limited to lexical retrieval. Pedagogical recommendations are presented for teaching and learning second-person pronouns in French.
Date: December 2008
Creator: McCourt, Claire A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Penile plethysmography: Validation with a juvenile sex offending population. (open access)

Penile plethysmography: Validation with a juvenile sex offending population.

Traditionally, juvenile sex offenders have been ignored in the literature. More recently the research has expanded particularly in the area of assessment and treatment. This study focused on the assessment of sexual arousal to deviant stimuli using the penile plethysmography (PPG) since it likely plays a significant role in juvenile sex offending behaviors. The goal of this study assessed its validity and reliability using Becker et al.'s set of PPG scenarios with a population of juvenile sex offenders. Significant differences were found between groups of (a) admitters versus partial admitters and (b) offenders with and without male victims. This study also examined the latent structure of the PPG results and found three dimensions: arousal to male stimuli, arousal to females and paraphilias, and arousal to non-sexual acts. These findings provide important implications for assessment of juvenile sex offenders and add to the clinical utility of PPG assessments.
Date: December 2008
Creator: Martinez, Tonantzin Dionisia
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Teaching Simple Auditory Discriminations to Students with Autism (open access)

Teaching Simple Auditory Discriminations to Students with Autism

This study aimed to test the effectiveness of classroom translations of some laboratory procedures for teaching simple auditory discriminations to learners with developmental disabilities. Three participants with autism and mental retardation were trained to make topographically distinct responses in the presence of two different stimuli, either a pure tone and silence, or two tones. A portable electronic piano keyboard was used to produce tones. Delayed prompt and differential reinforcement procedures were used to teach the responses. None of the participants performed the discriminations accurately without prompting despite numerous revisions to the procedures.
Date: December 2008
Creator: Marino, Kristine L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Risk Worth Taking: Incorporating Visual Culture Into Museum Practices. (open access)

A Risk Worth Taking: Incorporating Visual Culture Into Museum Practices.

As a museum educator who embraces social education and reflects on the postmodern condition, I found working within a traditional museum context to present challenges. As a result, I conducted an action research project focusing on ways to improve my own practice and affect change based on my engagement with visual culture discourse and the docents I teach. Having chosen action research, I implemented various teaching approaches and collected data over the course of several months. These data collection methods included interviews, museum documents, observational notes, recorded teaching practice, and daily journal entries. Narrative analysis was then used to interpret the collected data, specifically focusing how participants, including myself, make sense out of our experiences and how we value them.
Date: December 2008
Creator: Wurtzel, Kate
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Louder and Stronger? The Role of Signaling and Receptivity in Democratic Breakdowns and Their Impact Upon Neighboring Regimes (open access)

Louder and Stronger? The Role of Signaling and Receptivity in Democratic Breakdowns and Their Impact Upon Neighboring Regimes

The purpose of this thesis is to establish what specific forces influence whether or not a democratic setback within one nation will diffuse to peripheral states. Past studies devoted to this topic have largely suggested that diffusion essentially functions like a contagious disease, where the likelihood of "infection" is primarily based upon the level of interaction between states. This thesis however proposes that the interaction of the signal generated from a democratic state's collapse and the receptiveness of neighboring nations to this signal ultimately determines when and where diffusion will occur. In order to test the validity of this thesis' claims, the level of democracy within the neighboring states of all failed democratic governments spanning the years 1842-2002 are examined during the first years following such system breakdowns within a large-N quantitative research design. Ultimately this study leads to the conclusion that the interaction of signals and receptivity play a major role in the diffusion of democratic setbacks.
Date: December 2008
Creator: Ludwig, Tommy
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Observing and Attending in a Delayed Matching-to-Sample Preparation in Pigeons (open access)

Observing and Attending in a Delayed Matching-to-Sample Preparation in Pigeons

Pigeons worked in a titrating delay match-to-sample (TDMTS) procedure in which selecting the correct comparison stimulus increased the delay between sample offset and comparison-array onset and incorrect comparison selections decreased that delay. Prior research in our lab has shown that the stable adjusted value of the retention interval is a curvilinear function of the observing response requirement. The current study examined the effect of the distribution and predictability of observing response requirements on adjusted retention interval values. The data show that unpredictable observing response requirements were more effective in attenuating the deleterious effects of delay on matching accuracy. The data have implications for our understanding of attending and encoding in performances involving remembering over short temporal durations.
Date: December 2008
Creator: Lovelace, Bryan S.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Applications of Nanomanipulation Coupled to Nanospray Mass Spectrometry in Trace Fiber Analysis and Cellular Lipid Analysis. (open access)

Applications of Nanomanipulation Coupled to Nanospray Mass Spectrometry in Trace Fiber Analysis and Cellular Lipid Analysis.

The novel instrumentation of nanomanipulation coupled to nanospray mass spectrometry and its applications are presented. The nanomanipulator has the resolution of 10nm step sizes allowing for specific fine movement used to probe and characterize objects of interest. Nanospray mass spectrometry only needs a minimum sample volume of 300nl and a minimum sample size of 300attograms to analyze an analyte making it the ideal instrument to couple to nanomanipulation. The nanomanipulator is mounted to an inverted microscope and consists of 4 nano-positioners; these nano-positioners hold end-effectors and other tools used for manipulation. This original coupling has been used to enhance the current abilities of cellular probing and trace fiber analysis. Experiments have been performed to demonstrate the functionality of this instrument and its capabilities. Histidine and caffeine have been sampled directly from single fibers and analyzed. Lipid bodies from cotton seeds have been sampled indirectly and analyzed. The few applications demonstrated are only the beginning of nanomanipulation coupled to nanospray mass spectrometry and the possible applications are numerous especially with the ability to design and fabricate new end-effectors with unique abilities. Future study will be done to further the applications in direct cellular probing including toxicology studies and organelle analysis of …
Date: December 2008
Creator: Ledbetter, Nicole
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Analyze and Rebuild an Apparatus to Gauge Evaporative Cooling Effectiveness of Micro-Porous Barriers. (open access)

Analyze and Rebuild an Apparatus to Gauge Evaporative Cooling Effectiveness of Micro-Porous Barriers.

The sample used for evaporative cooling system is Fabric defender 750 with Shelltite finish. From the experimental data and equations we have diffusion coefficient of 20.9 ± 3.71 x 10-6 m2/s for fabric with one layer with 17%-20% fluctuations from the theory, 27.8 ± 4.5 x 10-6 m2/s for fabric with two layers with 6%-14% fluctuations from the theory and 24.9 ± 4.1 x 10-6 m2/s for fabric with three layers with 13%-16% fluctuations from the theory. Since the thickness of the fabric increases so the mass transport rate decreases so the mass transport resistance should be increases. The intrinsic mass resistances of Fabri-1L, Fabri-2L and Fabri-3L are respectively 104 ± 10.2 s/m, 154 ± 23 s/m and 206 ± 26 s/m from the experiment.
Date: December 2008
Creator: Mohiti Asli, Ali
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Hardware and Software Codesign of a JPEG2000 Watermarking Encoder (open access)

Hardware and Software Codesign of a JPEG2000 Watermarking Encoder

Analog technology has been around for a long time. The use of analog technology is necessary since we live in an analog world. However, the transmission and storage of analog technology is more complicated and in many cases less efficient than digital technology. Digital technology, on the other hand, provides fast means to be transmitted and stored. Digital technology continues to grow and it is more widely used than ever before. However, with the advent of new technology that can reproduce digital documents or images with unprecedented accuracy, it poses a risk to the intellectual rights of many artists and also on personal security. One way to protect intellectual rights of digital works is by embedding watermarks in them. The watermarks can be visible or invisible depending on the application and the final objective of the intellectual work. This thesis deals with watermarking images in the discrete wavelet transform domain. The watermarking process was done using the JPEG2000 compression standard as a platform. The hardware implementation was achieved using the ALTERA DSP Builder and SIMULINK software to program the DE2 ALTERA FPGA board. The JPEG2000 color transform and the wavelet transformation blocks were implemented using the hardware-in-the-loop (HIL) configuration.
Date: December 2008
Creator: Mendoza, Jose Antonio
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Stories: A Revision of the Willingness & Action Measure for Children and Adolescents (WAM-C/A) (open access)

Stories: A Revision of the Willingness & Action Measure for Children and Adolescents (WAM-C/A)

In its earliest stages, acceptance and commitment therapy (ACT; Hayes, Strosahl, & Wilson, 1999) with youths appears to be a promising therapeutic approach. Experiential willingness and committed action are two foci of ACT, making their assessment an integral part of therapy. Field tests have found validity problems with the Willingness and Action Measure for Children and Adolescents (WAM-C/A). The current study utilized the Story Version of the Willingness and Action Measure for Children and Adolescents (SWAM-C/A). Results supported the relationship between the SWAM-C/A and measures of experiential avoidance and mindfulness. Factor analysis indicated the presence of several distinct willingness and action factors. These results support the need for continued work on measurement of willingness and action in youth.
Date: December 2008
Creator: Larson, Christina Mary
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Gods, Have Merced! A Documentary Film (open access)

Gods, Have Merced! A Documentary Film

Gods, Have Merced! chronicles the struggle of Jose Merced, a Santeria priest, with the city of Euless, Texas, where he has been residing for 17 years in an effort to overrule an ordinance that bans the most critical element of his faith: animal sacrifice. As the city officials justify the ban on the basis of public health, Merced thinks he is merely a victim of selective code enforcement aimed a restricting his freedom of religion. Local and national media covered the lawsuit he filed against the City of Euless, and Merced seems ready to take the fight over animal sacrifice to the United States Supreme Court. He wants American justice to give his African-originated religion recognized in a city where people seem uneasy about a practice that brings back the historic fears of Voodoo and its popularly assumed malefic practices. The film explores the complex structure of Santeria, its African roots, its renaissance in the Americas and the very controversial issue of animal sacrifice in the US.
Date: December 2008
Creator: Lakpassa, Komlan Daholega
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Influence of stormwater drainage facilities on mosquito communities within the city of Denton, Texas. (open access)

Influence of stormwater drainage facilities on mosquito communities within the city of Denton, Texas.

Weekly collections were conducted from May to December, 2007 (153 trap nights, total) in Denton, Texas, in and around large storm drains and overpass drainage facilities in residential and non-residential areas, using Centers for Disease Control (CDC) light traps and gravid traps. A total of 1964 mosquitoes were collected, representing 24 species within 6 genera: Aedes, Anopheles, Culiseta, Culex, Psorophora, and Uranotaenia. Culex was the most abundant genus, representing 75% of all mosquitoes collected; Aedes was the second most abundant, representing 12 % of all mosquitoes collected. Cx. quinquefasciatus was the dominant species collected via gravid traps; Cx. (Melanoconion) species were the dominant species collected via CDC light traps. Data of gravid traps and light traps were analyzed separately using nonparametric correlation analysis, comparing environmental data and physical characteristics to total abundance of mosquitoes. There was no significant correlation found when comparing the three dominant species collected in light traps (unidentified Cx. (Melanoconion) sp, Cx. quinquefasciatus, and Ae. vexans) to environmental characteristics and physical characteristics. Analysis of Cx. quinquefasciatus collected in gravid traps indicated no significant correlation between abundance, environmental data, and physical characteristics. Linear regression models were analyzed to determine if either environmental variables or physical characteristics of the …
Date: December 2008
Creator: Kavanaugh, Michael David
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Singing Songs of Social Significance: Children's Music and Leftist Pedagogy in 1930s America (open access)

Singing Songs of Social Significance: Children's Music and Leftist Pedagogy in 1930s America

In their shared goal of communicating left-wing principles to children through music, Marc Blitzstein's Worker's Kids of the World (1935), Aaron Copland's The Second Hurricane (1937), and Alex North's The Hither and Thither of Danny Dither (1941) exhibit a fundamental unity of purpose that binds them both to each other and to the extensive leftist pedagogical efforts of their time. By observing the parallel relationship among these three children's works and contemporary youth organizations, summer camps, and children's literature, their cultural objectives and stylistic idiosyncrasies emerge as expressions of a continuously evolving educational tradition. Whereas Worker's Kids comes out of the revolutionary Communist aesthetics of the Composers' Collective and the militant activism of The Young Pioneers, The Second Hurricane and Danny Dither reflect the increasingly accommodating educational efforts of the American Popular Front.
Date: December 2008
Creator: Haas, Benjamin D.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Effects of Fixed- and Variable-Ratio Token Exchange Schedules on Performance with Children with Autism (open access)

Effects of Fixed- and Variable-Ratio Token Exchange Schedules on Performance with Children with Autism

The research literature with nonhumans supports findings that token economies are a common component of training programs. The literature suggests that the schedule by which exchange opportunities become available determines the organization of behavioral performances in token economies to a great extent. This study sought to systematically document whether the dynamics observed in basic laboratory procedures will also be observed in a child diagnosed with autism spectrum disorders and whether altering schedules by which the exchange opportunities become available will attenuate these effects. The participant was exposed to two conditions: 1) a fixed token-production schedule (FR1) with a fixed token-exchange schedule (FR5) and 2) a fixed token-production schedule (FR1) with a variable token-exchange schedule (VR5). Results of the current study did not lend themselves to draw definitive conclusions that the patterns of responding observed in this experiment were in fact due to the change in the token exchange schedule.
Date: December 2008
Creator: Greaves, Stephanie A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Organizational Rhetoric in the Academy: Junior Faculty Perceptions and Roles (open access)

Organizational Rhetoric in the Academy: Junior Faculty Perceptions and Roles

The purpose of this project was to examine the perceptions of junior faculty members as they relate to roles and expectations related to the tenure process. The study utilized a mixed methods approach to gain a multifaceted perspective of this complex process. I employed a quantitative and qualitative survey to explore junior faculty perceptions regarding roles related to promotion and tenure policies. In addition, I conducted fantasy theme analysis (FTA) to explore the organizational rhetoric related to these policies. Findings from the study illustrate the continued presence of the "publish or perish" paradigm, as well as issues related to role conflict within the context of organizational rhetoric.
Date: December 2008
Creator: Gordon, Cynthia K.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Perspectives on The Passion According to the Gospels of Matthew and John (open access)

Perspectives on The Passion According to the Gospels of Matthew and John

My thesis covers the materials and methods of my composition, The Passion According to the Gospels of Matthew and John. It features an extensive analysis of Penderecki's Passio et mors Domini nostri Iesu Christi secundum Lucam. The research also covers some history of the Passion genre and its development. The second half of the paper presents a background and analysis of my work. It details many of the creative processes and methods I employed.
Date: December 2008
Creator: Fryklund, Aaron
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Measures of reading comprehension: The effects of text type and time limits on students' performance. (open access)

Measures of reading comprehension: The effects of text type and time limits on students' performance.

Although the importance of reading comprehension is generally recognized, a better understanding of the factors influencing measurement of reading comprehension may impact the ability to assess strengths and deficits. The current study examined the effects of text type and time limits on the rate of students' performance across four common assessments of reading comprehension. Results showed similarities between performance with narrative and expository texts and across time limit conditions for all of the assessments. In terms of comparing across reading comprehension assessments, the findings are limited by the differences in the response channels and stimulus conditions of each assessment. The results have implications for the development of measurement systems and the assessment of reading comprehension.
Date: December 2008
Creator: Falke, Lisa G.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Semantic Shift and the Link between Words and Culture. (open access)

Semantic Shift and the Link between Words and Culture.

This thesis is concerned with the correlation between cultural values and the semantic content of words over time; toward this purpose, the research focuses on Judeo-Christian religious terminology in the English language. The Sapir-Whorf hypothesis is of central interest to this study, and the implications of the hypothesis, including a bidirectional interpretation allowing for both the influence of language on worldview and culture on language, is of great relevance to the research findings and conclusions. The paper focuses on the etymology and sources of religious terminology in the English language, the prominent category of terms with both religious and secular applications attained through semantic shift, and the role of religious words as English taboo. The research findings imply that a bidirectional understanding of the Sapir-Whorf hypothesis is the correct one. This is achieved both through analysis of historical events and linguistic development which emphasize the speaker's role in language development and through the study of societal values that are reinforced through linguistic practices, namely taboo.
Date: December 2008
Creator: Dunai, Amber
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Errors in skin temperature measurements. (open access)

Errors in skin temperature measurements.

Numerical simulation is used to investigate the accuracy of a direct-contact device for measuring skin-surface temperature. A variation of thermal conductivity of the foam has greater effect on the error rather than a variation of the blood perfusion rate. For a thermal conductivity of zero, an error of 1.5 oC in temperature was identified. For foam pad conductivities of 0.03 and 0.06 W/m-oC, the errors are 0.5 and 0.15 oC. For the transient study, with k=0 W/m-oC, it takes 4,900 seconds for the temperature to reach steady state compared with k=0.03 W/m-oC and k=0.06 W/m-oC where it takes 3,000 seconds. The configuration without the foam and in presence of an air gap between the skin surface and the sensor gives the most uniform temperature profile.
Date: December 2008
Creator: Dugay, Murielle
Object Type: Thesis or Dissertation
System: The UNT Digital Library
General Nathan Twining and the Fifteenth Air Force in World War II (open access)

General Nathan Twining and the Fifteenth Air Force in World War II

General Nathan F. Twining distinguished himself in leading the American Fifteenth Air Force during the last full year of World War II in the European Theatre. Drawing on the leadership qualities he had already shown in combat in the Pacific Theatre, he was the only USAAF leader who commanded three separate air forces during World War II. His command of the Fifteenth Air Force gave him his biggest, longest lasting, and most challenging experience of the war, which would be the foundation for the reputation that eventually would win him appointment to the nation's highest military post as Chairman of the Joint Chiefs of Staff during the Cold War.
Date: May 2008
Creator: Hutchins, Brian
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Extermination Warfare? The Conduct of the Second Marine Division at Saipan (open access)

Extermination Warfare? The Conduct of the Second Marine Division at Saipan

Historians John W. Dower, Craig Cameron, and Ronald Takaki argue that the Pacific War was a war of extermination fueled by race hate. Therefore, the clash between the military forces of the Japanese Empire and United States of America yielded a "kill or be killed" environment across the battlefields of the Pacific. This work examines the conduct of the Second Marine Division during its campaign of conquest against the Japanese held island of Saipan from June 15, 1944-July 9, 1944. It is based upon traditional military history sources to test their theories in context of the conduct of Marines toward Japanese soldiers and civilians during the Saipan campaign. Did Marines practice a war of extermination or conduct themselves in a humane manner?
Date: May 2008
Creator: Hegi, Benjamin P.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Effects of a "Responsive Teaching Strategy" to Increase Toy Play in Young Children with Autism in an Inclusive Setting. (open access)

The Effects of a "Responsive Teaching Strategy" to Increase Toy Play in Young Children with Autism in an Inclusive Setting.

Toy play represents one of many levels of play where children can expand their repertoires and socially interact with peers. Play typically increases in complexity as the child's repertoire develops; however, children with autism often have delayed play skills. The current study investigated the effects of using a 3-component play training procedure (choices, prompting, and consequences), replicated from a previous study, to increase simple and pretend toy play in three boys with autism. Additional measures were used to observe engagement with materials, children, and adults during a 10-minute session. Observations show increased toy play for two participants and increases in overall engagement for all participants. The findings suggest that the teaching program used is replicable across multiple populations, furthering the advancement of evidence-based practices.
Date: May 2008
Creator: Harder, Julianne M.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Use of In-Stream Water Quality Measurements and Geospatial Parameters to Predict Consumer Surfactant Toxic Units in the Upper Trinity River Watershed, Texas (open access)

Use of In-Stream Water Quality Measurements and Geospatial Parameters to Predict Consumer Surfactant Toxic Units in the Upper Trinity River Watershed, Texas

Surfactants are used in a wide assortment of "down-the-drain" consumer products, yet they are often discharged in wastewater treatment plant effluent into receiving water, potentially causing environmental harm. The objective of this project was to predict surfactant toxic units and in-stream nutrients in the upper Trinity River watershed. Surface and pore water samples were collected in late summer 2005. General chemistries and surfactant toxic units were calculated. GIS models of anthropogenic and natural factors were collected and analyzed according to subwatersheds. Multiple regression analyses using the Maximum R2 improvement method were performed to predict surfactant toxic units and in-stream nutrients using GIS and in-stream values. Both geospatial and in-stream parameters generated multiple regression models for surfactant surface and pore water toxic units, as well as in-stream nutrients, with high R2 values. Thus, GIS and in-stream parameter modeling have the potential to be reliable and inexpensive method of predicting surfactant toxic units and nutrient loading in the upper Trinity River watershed.
Date: May 2008
Creator: Johnson, David Richard
Object Type: Thesis or Dissertation
System: The UNT Digital Library