A Study of the Technological, Instructional, and Motivational Factors Affecting Phr Certification Exam Outcomes (open access)

A Study of the Technological, Instructional, and Motivational Factors Affecting Phr Certification Exam Outcomes

Although previous studies have considered the factors affecting other certification exam outcomes, they have not examined those that are related to performance on the Professional in Human Resources (PHR) exam. In response to that need, this study specifically investigates technology and training factors that affect self-efficacy and self-set goals, and through them, influence PHR certification exam results. The target population for the study consisted of recent examinees who had taken a formal PHR examination preparation class or used another form of exam preparation training. The survey results were analyzed using partial least squares modeling techniques, and mediation effects were then tested. The results demonstrated that PHR training self-efficacy affected PHR exam self-efficacy and self-set goals. These factors then had an impact on PHR exam scores. Also, the results of task-technology fit were indirectly related to PHR training self-efficacy through a multiple mediation model that included the instructional factor of time on task and the technology factor of perceived usefulness. Surprisingly, time spent on practice exam questions was found to be negatively related to PHR certification exam scores. Finally, instructional feedback indirectly affected outcomes through its positive relationship to self-set goals. The results of the research should help training professionals and …
Date: May 2012
Creator: Bonner, David M.
System: The UNT Digital Library
Knowledge Discovery of Nanotube Mechanical Properties With an Informatics-Molecular Dynamics Approach (open access)

Knowledge Discovery of Nanotube Mechanical Properties With an Informatics-Molecular Dynamics Approach

Carbon nanotubes (CNT) have unparalleled mechanical properties, spanning several orders of magnitude over both length and time scales. Computational and experimental results vary greatly, partly due to the multitude of variables. Coupling physics-based molecular dynamics (MD) with informatics methodologies is proposed to navigate the large problem space. The adaptive intermolecular reactive empirical bond order (AIREBO) is used to model short range, long range and torsional interactions. A powerful approach that has not been used to study CNT mechanical properties is the derivation of descriptors and quantitative structure property relationships (QSPRs). For the study of defected single-walled CNTs (SWCNT), two descriptors were identified as critical: the density of non-sp2 hybridized carbons and the density of methyl groups functionalizing the surface. It is believed that both of these descriptors can be experimentally measured, paving the way for closed-loop computational-experimental development. Informatics can facilitate discovery of hidden knowledge. Further evaluation of the critical descriptors selected for Poisson’s ratio lead to the discovery that Poisson’s ratio has strain-varying nonlinear elastic behavior. CNT effectiveness in composites is based both on intrinsic mechanical properties and interfacial load transfer. In double-walled CNTs, inter-wall bonds are surface defects that decrease the intrinsic properties but also improve load transfer. …
Date: May 2012
Creator: Borders, Tammie L.
System: The UNT Digital Library
Development of Wireless Sensor Network System for Indoor Air Quality Monitoring (open access)

Development of Wireless Sensor Network System for Indoor Air Quality Monitoring

This thesis describes development of low cost indoor air quality (IAQ) monitoring system for research. It describes data collection of various parameters concentration present in indoor air and sends data back to host PC for further processing. Thesis gives detailed information about hardware and software implementation of IAQ monitoring system. Also discussed are building wireless ZigBee network, creating user friendly graphical user interface (GUI) and analysis of obtained results in comparison with professional benchmark system to check system reliability. Throughputs obtained are efficient enough to use system as a reliable IAQ monitor.
Date: December 2012
Creator: Borkar, Chirag
System: The UNT Digital Library
After the Planes (open access)

After the Planes

The dissertation consists of a critical preface and a novel. The preface analyzes what it terms “polyvocal” novels, or novels employing multiple points of view, as well as “layered storytelling,” or layers of textuality within novels, such as stories within stories. Specifically, the first part of the preface discusses polyvocality in twenty-first century American novels, while the second part explores layered storytelling in novels responding to World War II or the terrorist attacks of 9/11. The preface analyzes the advantages and difficulties connected to these techniques, as well as their aptitude for reflecting the fractured, disconnected, and subjective nature of the narratives we construct to interpret traumatic experiences. It also acknowledges the necessity—despite its inherent limitations—of using language to engage with this fragmentation and cope with its challenges. The preface uses numerous novels as examples and case studies, and it also explores these concepts and techniques in relation to the process of writing the novel After the Planes. After the Planes depicts multiple generations of a family who utilize storytelling as a means to work through grief, hurt, misunderstanding, and loss—whether from interpersonal conflicts or from war. Against her father’s wishes, a young woman moves in with her nearly-unknown grandfather, …
Date: May 2012
Creator: Boswell, Timothy
System: The UNT Digital Library
The Invisible Dragon (open access)

The Invisible Dragon

This collection of memoir essays chronicles the author's 19 year struggle with chronic depression. "The Invisible Dragon" explores the onset of the disease and its cure. "The Silent Typewriter" looks at how it affected the author as a writer. "Roses for Trish" discusses how it affected his wife. "My Mother's Son" explores the possibility that he inherited depression from his mother. The final essay, "The Dragon Returns" probes the author's life in 2012 with the probability that he has a personality disorder. The preface examines several depression memoirs and explores the strategies used by William Styron, Elizabeth Wurtzel and Kay Redfield Jamison to prevent sliding into the pitfalls inherent in a linear structure. Among these are the use of alternative structures, language, characterization, focus and imagery.
Date: December 2012
Creator: Boutwell, Nathan
System: The UNT Digital Library
Antigravity (open access)

Antigravity

This dissertation contains two parts: Part I, which discusses the elegy of possessive intent, a subgenre of the contemporary American elegy; and Part II, Antigravity, a collection of poems. English elegies have been closely rooted to a specific grief, making the poems closer to occasional poems. The poet—or at least the poet’s speaker—seeks some kind of public consolation for (often) a private loss. The Americanized form does stray from the traditional elegy yet retains some of its characteristics. Some American elegies memorialize failed romantic relationships rather than the dead. In their memorials, these speakers seek a completion for the lack the broken relationship has created in the speakers’ lives. What they can’t replace, they substitute with something personal. As the contemporary poem becomes further removed from tradition, it’s no surprise that the elegy has evolved as well. Discussions of elegies have never ventured into the type of elegy that concerns itself with the sort of unacknowledged loss found in some contemporary American poems of unrequited love. These poems all have speakers who willfully refuse to acknowledge the loss of their love-objects and strive to maintain control/ownership of their beloveds even in the face of rejection.
Date: August 2012
Creator: Bowen, Ashley Hamilton
System: The UNT Digital Library
Tactile Media: Factors Affecting the Adoption of Touchscreen Smartphones Among Consumers with Vision Loss (open access)

Tactile Media: Factors Affecting the Adoption of Touchscreen Smartphones Among Consumers with Vision Loss

Touchscreen technology is on the rise as the new standard in smartphone design. But, the usability of touchscreen is hindered for consumers that lack the physical ability to navigate such devices. Two focus groups were conducted in order to identify specific uses and gratifications that people with visual impairments had when using mobile phones. Additional questions were presented to the participants to determine if touchscreen technology limited access to communication and entertainment. The responses revealed an upward trend in touchscreen smartphone adoption among the participants. These users chose to adopt touchscreen smartphones that had built-in and downloadable assistive features which contributed to user-friendly designs.
Date: May 2012
Creator: Bradley, Sapora L.
System: The UNT Digital Library
“Sounds for Adventurous Listeners”: Willis Conover, the Voice of America, and the International Reception of Avant-garde Jazz in the 1960S (open access)

“Sounds for Adventurous Listeners”: Willis Conover, the Voice of America, and the International Reception of Avant-garde Jazz in the 1960S

In “Sounds for Adventurous Listeners,” I argue that Conover’s role in the dissemination of jazz through the Music USA Jazz Hour was more influential on an educational level than what literature on Conover currently provides. Chapter 2 begins with an examination of current studies regarding the role of jazz in Cold War diplomacy, the sociopolitical implications of avant-garde jazz and race, the convergence of fandom and propaganda, the promoter as facilitator of musical trends, and the influence of international radio during the Cold War. In chapter 3 I introduce the Friends of Music USA Newsletter and explain its function as a record of overseas jazz reception and a document that cohered a global network of fans. I then focus on avant-garde debates of the 1960s and discuss Conover’s role overseas and in the United States. Chapter 4 engages social purpose and jazz criticism in the 1960s. I discuss Conover’s philosophy on social responsibility, and how his contributions intersected with other relevant discourses on race on the eve of the civil rights movement. I argue that Conover embodied two personas: one as jazz critic and promoter in the United States, and the other as an international intermediary. In chapter 5 I …
Date: August 2012
Creator: Breckenridge, Mark A.
System: The UNT Digital Library
Early College High School: Hispanic Students’ Perceptions and Experiences From a Texas Campus (open access)

Early College High School: Hispanic Students’ Perceptions and Experiences From a Texas Campus

Early college high school (ECHS) is a dual enrollment program that allows high school students to earn college credits while in high school. ECHS was developed with the intention of attracting students to pursue a 4-year college degree, especially students who might not attend college without intervention. The program targets students from low-income families, students who have low academic achievement, and students from minority groups including Hispanics, African Americans, and Native Americans. The purpose of this study was to explore the perceptions and opinions of Hispanic students about their experiences in an ECHS, and to better understand how their ECHS experiences affected motivation to engage in academics. The expectancy theory and college-going culture provided the theoretical framework for this case study. Semi-structured interviews captured the experiences of the participants. The study focused on 10 Hispanic students, 5 seniors and 5 juniors, enrolled at an ECHS located on a community college campus in Texas. The study found that students with higher motivation to work at high school and college courses had several reasons for choosing to attend ECHS. The reasons included a chance to earn a high school diploma and associate’s degree simultaneously, free college tuition, and an accelerated program to …
Date: May 2012
Creator: Brenner, Rose K.
System: The UNT Digital Library
Texas Principals’ Perceptions of Professional Development Provided By the Local School District (open access)

Texas Principals’ Perceptions of Professional Development Provided By the Local School District

The purpose of this study was to investigate the perceptions of Texas principals as to the degree to which their local school districts are meeting their ongoing professional development need. The study was conducted to analyze and describe the survey and interview responses of Texas principals as to their perceptions of the degree to which their local school districts provide learning experiences aligned with their needs. Texas principals’ perceptions regarding the characteristics of important and meaningful professional learning experiences were explored. The study included an analysis of the extent to which Texas principals perceive that the learning opportunities they are provided adequately meet those needs. Additionally, various factors influencing principals and their perceptions were examined. These factors included type of school, school setting, school system size, characteristics of students, and characteristics of the principals. The perceptions of school district staff development administrators were analyzed regarding topic importance, topic provision by the local district, and the usefulness of those topics. Finally, the perceptions of the principals and the staff development administrators were compared. Thirteen school districts participated in this study. Of the 273 principals surveyed, 155 completed the survey, yielding a return rate of 56.8%. One campus principal from each of …
Date: August 2012
Creator: Brockman, Mary Elizabeth
System: The UNT Digital Library
Predictors of Quality of Life (Qol): Comparing Baby Boomers, Older Adults, and Younger Adults Using Data From the 2010 National Health Interview Survey (open access)

Predictors of Quality of Life (Qol): Comparing Baby Boomers, Older Adults, and Younger Adults Using Data From the 2010 National Health Interview Survey

The purpose of this study was to identify factors that predict quality of life (QOL) for aging adults and to examine and compare Baby Boomers', Older Adults' and Younger Adults' responses to the 2010 National Health Interview Survey/QOL Functioning and Disability. Significant findings included several significant values based on the multivariate regression to estimate a model to predict QOL. In particular, being male, four ethnicities other than white, being older than Boomer, age in 10 years, the Functional Difficulty Index, the Functional Limitation Index scores, chronic heart disease, asthma, and arthritis all had significant p values. Adults with chronic heart disease, asthma, or arthritis scored lower on the QOL index, but cancer, stroke, or diabetes were not associated with the QOL index. Two hypotheses had strong support. Lower scores on both the Functional Difficulty Index and the Functional Limitation Index yielded lower QOL scores. Further research recommendations include establishing reliability and validity of the QOL index; running additional regressions for demographics (ethnicity, marital status, etc.) to predict possible combinations of variables predicting QOL or barriers to QOL; and investigating the viability of incorporating the QOL index into an electronic medical record (EMR) dashboard parameter to serve as a screening mechanism …
Date: December 2012
Creator: Bryce, Helen Roult
System: The UNT Digital Library
Ecology and Recolonization of Benthic Macroinvertebrates in a Groundwater-dependent Stream in North Central Texas During a Supra-seasonal Drought (open access)

Ecology and Recolonization of Benthic Macroinvertebrates in a Groundwater-dependent Stream in North Central Texas During a Supra-seasonal Drought

Extreme climatic events such as droughts are known to eliminate aquatic biota and alter community structure and function. Perennial headwater springs provide important drought refugia to benthic macroinvertebrates and an important source of colonists via drift or aerial adults to intermittent streams post-drought. During a supra-seasonal drought in North-central Texas summer and fall 2006, benthic macroinvertebrates from persistent groundwater-dependent macrohabitats of varying hydrological connectivity and riparian shading were studied: perennial riffles, connected pools, shaded disconnected pools, and full sun disconnected pools. Riffles were a distinct habitat with significantly higher taxa richness, proportion of lotic taxa, diversity and evenness than other macrohabitats. Macrohabitats were found to be important refugia for 106 benthic macroinvertebrates and 4 microcrustacean taxa. Throughout the extreme drought, perennially flowing habitats were refugia to 19 taxa (17.9% total taxa) not collected in disconnected pools. Shaded disconnected pools contained lotic taxa not previously known to be able to complete their lifecycles in lentic habitats, emphasizing the importance of groundwater effluent and shading. With the resumption of flow at a downstream intermittent site of Ash Creek in mid-October 2006, an annual recolonization study was conducted comparing the perennial headwaters’ benthic macroinvertebrate taxa richness, densities and community ecology with the downstream …
Date: May 2012
Creator: Burk, Rosemary A.
System: The UNT Digital Library
Affective Forecasting: the Effects of Immune Neglect and Surrogation (open access)

Affective Forecasting: the Effects of Immune Neglect and Surrogation

Studies of affective forecasting examine people’s ability to predict (forecast) their emotional (affective) responses to future events. Affective forecasts underlie nearly all decisions people make and the actions they take. However, people engage in systematic cognitive errors when making affective forecasts and most often overestimate the intensity and duration of their emotional responses. Understanding the mechanisms that lead to affective forecasting errors (e.g., immune neglect) and examining the utility of methods for improving affective forecasting errors (e.g., surrogation) can provide highly valuable information for clinicians as they assist clients in determining their goals both for therapy and for life. The first purpose of the current study was to determine if affective forecasting errors due to immune neglect lead to misjudgments about the relative emotional impact of minor versus moderate negative experiences (i.e., trauma severity). The second purpose was to examine the utility of surrogation for improving affective forecasts. Potential interaction effects between these two variables were also examined. The current study utilized a 2 (Trauma Severity: minor, moderate) X 3 (Prediction Information: surrogation information only, simulation information only, both types of information) experimental design. Undergraduates were recruited via the SONA system and randomly assigned to one of the six experimental …
Date: August 2012
Creator: Burkman, Summer Dae
System: The UNT Digital Library
Acculturation and Depression in Older Mexican American Adults: the Role of Social Support (open access)

Acculturation and Depression in Older Mexican American Adults: the Role of Social Support

Despite socioeconomic disadvantages, less acculturated Mexican Americans tend to exhibit better mental health than their more acculturated counterparts. However, in the case of older Mexican American adults, research has demonstrated the opposite to be true (Gonzalez, Haan, & Hinton, 2001). A variable of interest potentially responsible for this difference is social support. Thus, the current study proposed to investigate the mediation and moderation effects that social support has on the relationship between acculturation and depression in older Mexican American adults age 60 or older. Data from the Health and Retirement Study (HRS) was analyzed. Results showed that the mediating effect of contact with one’s children (-.109*) and the moderating effect of total social support and contact with one’s children (-.127*; -.103*) were statistically significant in the relationship between acculturation and depression. Although these effects are small they may still hold important implications for better understanding this population.
Date: August 2012
Creator: Caballero, Daniela
System: The UNT Digital Library
José Antonio Gómez´s Versos Para Órgano (Section I): a Practical Guide for Performance (open access)

José Antonio Gómez´s Versos Para Órgano (Section I): a Practical Guide for Performance

José Antonio Gómez is an important figure in Mexican music history and his works are considered representative of the beginning of Mexico´s Independent era. Some musicians are familiar with Gómez´s choral output but his organ music is rarely considered. Due to the lack of an edition of Gómez´s Versets for Organ, a practical guide was found needed to aid its performance. This study is based on performance, analysis, and direct work on the only known source for it. The first chapter, Introduction, presents the argument for an edited version of the first part of the manuscript as a performance guide. The second provides biographical information on the composer. The third chapter discusses the background for the original performance of the Versets for Organ. Chapter 4 provides performance considerations for the works. The edition of the manuscript is included in chapter 5.
Date: August 2012
Creator: Carrasco Curíntzita, Laura A.
System: The UNT Digital Library
Teacher Educators: What Motivates Them to Choose Academe? (open access)

Teacher Educators: What Motivates Them to Choose Academe?

Currently, there is a shortage of professors preparing personnel to teach in high need areas (e.g., special education, English language learners) at institutions of higher education (IHE). The purpose of the present study was to examine the motivations or influencers that impelled individuals to pursue careers in IHEs as professors in personnel preparation. Data were collected using Motivations for Choosing Academia as a Profession (MCAP) and a 10-item Big Five Inventory (BFI-10). Two hundred eighty-nine professors of education representing the four U.S. census regions participated in the present study. The MCAP is a 25-item instrument designed to measure retrospective motivation of faculty decisions to enter the professoriate. The development of the MCAP is described and an exploratory factor analysis was employed to examine the psychometric validity of the instrument. Three factors emerged and implications are discussed. Data were analyzed using logistic regression with the dichotomous outcome variable being the area of education in which the professor works (i.e., general or special education).
Date: August 2012
Creator: Carrero, Kelly M.
System: The UNT Digital Library
Zebrafish Von Willebrand Factor (open access)

Zebrafish Von Willebrand Factor

In humans, von Willebrand factor (vWF) is a key component in hemostasis and acts as a 'cellular adhesive' by letting the circulating platelets bind to exposed subendothelium. It also acts as a carrier and stabilizer of factor VIII (FVIII). A dysfunction or reduction of vWF leads to von Willebrand disease (vWD), resulting in bleeding phenotype which affects 1% of the population. Currently there are a variety of animal models used for the study of vWF and vWD; however, they do not possess the advantages found in zebrafish. Therefore, we set out to establish zebrafish as a model for the investigation of vWF and vWD through the use of bioinformatics and various molecular techniques. Using bioinformatics we found that the vWF gene is located on chromosome 18, that the GPIb? protein sequence is conserved. Confirmation of vWF production was shown by means of immunostaining and by RT-PCR, in thrombocytes as well as in veins and arteries. Evidence of vWF involvement in hemostasis and thrombosis was shown using MO and VMO technology to produce a vWD like phenotype, resulting in an increase in TTO and TTA, as well as a reduction in FVIII when blood was tested using the kPTT assay, coinciding …
Date: August 2012
Creator: Carrillo, Maira M.
System: The UNT Digital Library
Data Envelopment Analysis: Measurement of Educational Efficiency in Texas (open access)

Data Envelopment Analysis: Measurement of Educational Efficiency in Texas

The purpose of this study was to examine the efficiency of Texas public school districts through Data Envelopment Analysis. The Data Envelopment Analysis estimation method calculated and assigned efficiency scores to each of the 931 school districts considered in the study. The efficiency scores were utilized in two phases. First, the school district efficiency scores were combined with school district student achievement to evaluate effectiveness with efficiency. A framework was constructed to graph the scores on an x-axis of student achievement scores and a y-axis of efficiency scores to further illustrate the data. The framework was evaluated with the full statewide sample and with school districts categorized into similar peer groups. Then, using variables selected from related scholarly literature, a regression analysis identified which factors impacted school district efficiency statewide. The non-discretionary variables included in the study were total student enrollment, the percentage of non-white students and the percentage of economically disadvantaged students. The discretionary variables selected included the teacher-to-student ratio, teachers’ average years of experience, the percentage of teachers with master’s degrees and the average teacher base salary. Amongst the seven factors selected for regression analysis, five statistically significant variables were identified as impacting statewide school district efficiency. All …
Date: August 2012
Creator: Carter, Lacy
System: The UNT Digital Library
Mothers' and Fathers' Parenting Characteristics in Relation to Family Earner Status and Self-perceived Interpersonal Competence (open access)

Mothers' and Fathers' Parenting Characteristics in Relation to Family Earner Status and Self-perceived Interpersonal Competence

With an increasing number of married mothers who participated in paid work roles, fathers with full-time employed spouses now are expected to assume the role of caregiver and have higher frequency of engagement in parenting practices. This study of 235 university students from dual-earner and single-earner families investigated their retrospective perceptions of both mothers' and fathers' frequency of engagement in overall and specific parenting behaviors. These perceptions were measured by the Parent Behavior Frequency Questionnaire-Revised Scale, which includes seven parenting characteristics and related behaviors. Paired samples t-tests suggested that married mothers, whether fully employed outside the home or not, engaged more frequently, than their full-time employed spouses, in parenting characteristics related to bonding, education, general welfare and protection, responsivity, and sensitivity. However, mothers' employment status had little influence upon the frequency at which either parent engaged in any of the seven parenting characteristics and related behaviors. University students who perceived that both parents were more frequently engaged in specific parenting behaviors related to education, responsivity and sensitivity rated themselves higher on interpersonal competence, as measured by the Interpersonal Competence Questionnaire-Revised Scale. Students who perceived that both parents were less frequently engaged in negative parenting behaviors rated themselves higher on competence …
Date: December 2012
Creator: Chang, Wen-Chuan Rita
System: The UNT Digital Library
Motivation and Resilience in Art Education: Insight and Inspiration From the Lives and Careers of Two Taiwanese College Art Teachers (open access)

Motivation and Resilience in Art Education: Insight and Inspiration From the Lives and Careers of Two Taiwanese College Art Teachers

This narrative study explores how two Taiwanese college art teachers’ lives and teaching experiences illustrate the ways they cultivate resilience and motivation to sustain professional commitments amidst challenges in their teaching careers. I use the life story interview as my methodology and a three-dimensional space approach to code and analyze my data to retell their stories about how resilience and motivation have guided them as they negotiated dilemmas in teaching. The participants’ stories demonstrate that in order to be motivated, teachers must satisfy their basic needs, which, in the language of Maslow’s need theory, include secure income, safety, love and belonging, respect, and personal accomplishment. To be resilient, art teachers need to facilitate self-efficacy as an essential belief to face challenges, and they also must gain support from family members, students, school administrators, and fellow members of professional organizations as external support resources. This study also illuminates the significance of international educational exchanges, the teaching knowledge constructed through layers of life and professional experience, and the importance of creating dialogue to address teachers’ challenges. Recommendations for future study include exploring further the relationship between motivation and resilience, specifying how gender difference affects the ways participants tell their stories, investigating how …
Date: August 2012
Creator: Chang, Ya-Ping
System: The UNT Digital Library
Korean Traditional Elements and Contemporary Compositional Techniques in Hyowon Woo’s Choral Music As Reflected in Gloria (open access)

Korean Traditional Elements and Contemporary Compositional Techniques in Hyowon Woo’s Choral Music As Reflected in Gloria

Among native Korean choral composers, Hyowon Woo has emerged as one of the most significant representatives of choral genre, both in Korea and internationally. She has created a new style of choral music that combines traditional Korean musical elements with contemporary Western compositional techniques, in a synthesis that generates new sonorities and effects. Her choral music falls into three basic categories: music employing direct quotation of Korean folk tunes or other elements, which produce typical Korean sonorities; music using Western practices, which produce modern and Western flavors; and music combining Korean traditional methods with modern Western concepts. Hyowon Woo’s unique contribution to contemporary Korean choral music is ideally represented by her Gloria, which will form the basis for this study. Because traditional Korean music culture has such a strong presence and influence on her choral compositions, detailed knowledge of these elements are essential for the study and performance of her work. The combination of traditional Korean music and Western contemporary techniques lies at the core of her compositional style, and is the principal focus of this study. A detailed understanding of these stylistic elements, both Korean and Western, and how they work together to achieve the composer’s purpose and vision, …
Date: August 2012
Creator: Chang, Yoonchung
System: The UNT Digital Library
Prevalence of Eating Disorders and Pathogenic Weight Control Behaviors Among Male Collegiate Athletes (open access)

Prevalence of Eating Disorders and Pathogenic Weight Control Behaviors Among Male Collegiate Athletes

Training in sport environments that emphasize leanness and muscularity may damage athletes' body image and negatively influence male athletes' eating behaviors and attitudes. The Questionnaire for Eating Disorder Diagnosis and the Bulimia Test – Revised were completed anonymously online by 732 male intercollegiate athletes. Most male collegiate athletes were classified as asymptomatic (82.9%), followed by symptomatic (16%) and eating disordered (1.1%). The most common forms pathogenic behaviors were excessive exercise (51.6%), binge eating (21.4%), and dieting or fasting (20.5%). Results suggested that athletes who participate in weight class sports are at higher risk for developing these behaviors than endurance sport or ball game athletes. Counseling and other implications for professionals working with athletes are discussed.
Date: August 2012
Creator: Chatterton, Justine M.
System: The UNT Digital Library
First Principles Calculations of the Site Substitution Behavior in Gamma Prime Phase in Nickel Based Superalloys (open access)

First Principles Calculations of the Site Substitution Behavior in Gamma Prime Phase in Nickel Based Superalloys

Nickel based superalloys have superior high temperature mechanical strength, corrosion and creep resistance in harsh environments and found applications in the hot sections as turbine blades and turbine discs in jet engines and gas generator turbines in the aerospace and energy industries. The efficiency of these turbine engines depends on the turbine inlet temperature, which is determined by the high temperature strength and behavior of these superalloys. The microstructure of nickel based superalloys usually contains coherently precipitated gamma prime (?) Ni3Al phase within the random solid solution of the gamma () matrix, with the ? phase being the strengthening phase of the superalloys. How the alloying elements partition into the and ? phases and especially in the site occupancy behaviors in the strengthening ? phases play a critical role in their high temperature mechanical behaviors. The goal of this dissertation is to study the site substitution behavior of the major alloying elements including Cr, Co and Ti through first principles based calculations. Site substitution energies have been calculated using the anti-site formation, the standard defect formation formalism, and the vacancy formation based formalism. Elements such as Cr and Ti were found to show strong preference for Al sublattice, whereas Co …
Date: August 2012
Creator: Chaudhari, Mrunalkumar
System: The UNT Digital Library
Examining the Effects of Apparel Attributes on Perceived Copyright Infringement and the Relationship Between Perceived Risks and Purchase Intention of Knockoff Fashion (open access)

Examining the Effects of Apparel Attributes on Perceived Copyright Infringement and the Relationship Between Perceived Risks and Purchase Intention of Knockoff Fashion

The growth of fast fashion retailers, availability of knockoff fashion apparel, and proposed apparel copyright law prompted this study. Fast fashion retailers are expanding rapidly and producing knockoffs fashion apparel in a matter of weeks, but current U.S. copyright laws do not protect apparel. The primary purpose of this study was to identify prominent visual fashion apparel attributes that could determine perceived copyright infringement. A secondary purpose was to examine the effects of fashion apparel attributes on perceived copyright infringement, perceived risk, and purchase intention. A sequential exploratory mixed method approach was used to explore the relationship between: Attributes, perceived copyright infringement, perceived risk, and purchase intention. This study consisted of a: Study one, study two, and study three. Twelve hypotheses were proposed, and five were supported. Quality significantly affected both perceived copyright infringement and purchase intention. Performance, social, and asset significantly affected purchase intention of knockoff fashion apparel.
Date: December 2012
Creator: Chaykowsky, Kelly
System: The UNT Digital Library