Degree Level

States

The Academic and Athletic Experiences of African-american Males in a Division I (Fbs) Football Program (open access)

The Academic and Athletic Experiences of African-american Males in a Division I (Fbs) Football Program

This study investigated the academic and athletic experiences of African-American males in a Division I football bowl subdivision football program. Critical race theory, identity development model, and social learning model were the theoretical frameworks used as the critical lenses in a qualitative design to examine the participants. The participants’ responses were analyzed and interpreted using thematic analysis. A qualitative research design, which included individual interviews with 10 second year African-American male football players, was used to address this research problem. The goal was to bring together both the psychological and sociological perspectives and to challenge participants to candidly describe their academic and athletic experiences and attitudes toward obtaining an undergraduate degree. Four themes were determined in the data analysis: differential treatment and determining oneself, time management, relationships, and career aspirations. In relation to the theoretical frameworks, the development of self-confidence and knowledge of balancing their academic and athletic schedules was critical for all participants. The sense of feeling different and challenged because of the differences in culture and experience was evident. From this study, university and collegiate athletics administrators may better understand the backgrounds, challenges, and learning needs of this population. As a result, higher education personnel may improve the …
Date: December 2013
Creator: Salinas, Silvia M.
System: The UNT Digital Library
Adolescent Behavior Problems and Interparental Conflict: the Moderating Role of Parent-child Attachment (open access)

Adolescent Behavior Problems and Interparental Conflict: the Moderating Role of Parent-child Attachment

The current study examined the role that parent-child attachment plays in the relationship between marital conflict and the development of behavior problems in adolescents. To evaluate the hypothesis that attachment moderates this relationship, 57 families were recruited via e-mail invitation sent to families that participated in local church youth groups, school organizations, and a treatment program designed for adolescents with behavior problems. One custodial parent and his/her adolescent child completed an online or paper version of a survey consisting of the Achenbach’s Behavior Checklists, the Inventory of Parent and Peer Attachment, and the Children’s Perception of Interparental Conflict Scale. Hypotheses were evaluated using Baron and Kenny’s (1986) procedures to test moderating effects with multiple regression analyses. Mother attachment demonstrated a significant moderation effect between the intensity of interparental conflict and the parent’s report of externalizing behavior problems. Specifically, at low conflict intensity levels, relative to low attachment security, high attachment security was associated with fewer externalizing behavior problems, whereas at high intensities of interparental conflict high attachment security was associated with more externalizing behavior problems.
Date: December 2013
Creator: Daubs, Carlyn
System: The UNT Digital Library
American Indian Worldviews, Risk Perceptions and Disaster Planning: an Exploratory Study (open access)

American Indian Worldviews, Risk Perceptions and Disaster Planning: an Exploratory Study

It is commonly assumed that when confronted with an imminent hazard that people will react rationally, and prepare for, or at least attempt to avoid, danger from pending disasters. However, this conventional wisdom is not as evident as it appears. People prepare for, react to, or take social action to avoid hazards when they perceive the risk of danger to be threatening enough to warrant action, providing one has the will, insight and resources to do so. However, not all people perceive risks similarly. Risk is perceived differently by different people which affects risk perception and responses to hazards. This dissertation explores the relationships between American Indian worldviews, risk perceptions and disaster planning. To carry out this research 28 American Indians were interviewed. The sample consists of 14 American Indians residing in a rural are on the northern plains and 14 urban American Indians. The results only partially support that worldview is linked to risk perception and subsequent disaster planning. Other factors found to relate to risk perception and disaster planning for this non-representative sample of American Indians include various forms of social vulnerability.
Date: December 2013
Creator: Bales, Rodney A.
System: The UNT Digital Library
Analyzing Delinquency Among Kurdish Adolescents: a Test of Hirschi’s Social Bonding Theory (open access)

Analyzing Delinquency Among Kurdish Adolescents: a Test of Hirschi’s Social Bonding Theory

This study examines the mediating effect of social bonding on delinquent behavior among Kurdish teens. Major influences to the study of self concept and delinquency based on Hirschi’s social bonding theory are reviewed. The data was collected from a sample of 100 Kurdish teens attending a Gülen affiliated school (Private Çaglayan Murat Anatolian Science High School in Şanlıurfa, Turkey) and 100 Kurdish teens attending a public (non- Gülen) school (The Public High School in Diyarbakır, Turkey). There are two dependent variables for this research project: Involvement in major delinquency and involvement in minor delinquency. The components of social bonding attachment, involvement, commitment, and belief were used as independent variables. Participants’ age ranged between 16 to 18 years. I hypothesize that the relation between the social bonding elements and delinquency should be stronger in the case of Kurdish adolescents who are more attached to conventional Turkish society. Results from binary logistic regression analyses indicate that in the absence of bonding, Kurdish teenagers tend to engage in major and minor delinquent activities. For further exploration and results, the Gülen Movement was examined as an independent variable. Findings suggest a strong relationship between the Gülen Movement and Kurdish adolescents’ probability of involvement in …
Date: December 2013
Creator: Ziyanak, Sebahattin
System: The UNT Digital Library
Assessing Local Governments’ Debt Financing Strategies (open access)

Assessing Local Governments’ Debt Financing Strategies

This dissertation assesses the importance of a specific debt instrument, the Certifi- cate of Obligation in the state of Texas. It conceptualizes the Certificate of Obligation as a type of contractual debt that enables local governments to finance their capital projects. This dissertation is guided by three research questions: (1) What are the various types of debt instruments employed by local governments and what are their relative advantages? (2) How prevalent is the use of a specific debt instrument such as Certificates of Obligation? And why would some local governments prefer to issue them while others do not? (3) To what extent does the local institutional environment, e.g., the executive authority of city managers in the council-manager form of government, affect debt financing behaviors of local governments? To examine the first research question, we created a typology to represent four ideal types of borrowing methods: (1) Contractual Debt, (2) Voter Approval/Special Tax Debt, (3) Guaranteed, and (4) Non-Guaranteed Debts. The typology examines whether or not the state mandates the referendum requirement for the use of each of these debt instruments, and at the same time determines whether each debt instrument is secured by multiple or single revenue sources. Using data …
Date: December 2013
Creator: Lung, Wei-Liang
System: The UNT Digital Library
Boosting for Learning From Imbalanced, Multiclass Data Sets (open access)

Boosting for Learning From Imbalanced, Multiclass Data Sets

In many real-world applications, it is common to have uneven number of examples among multiple classes. The data imbalance, however, usually complicates the learning process, especially for the minority classes, and results in deteriorated performance. Boosting methods were proposed to handle the imbalance problem. These methods need elongated training time and require diversity among the classifiers of the ensemble to achieve improved performance. Additionally, extending the boosting method to handle multi-class data sets is not straightforward. Examples of applications that suffer from imbalanced multi-class data can be found in face recognition, where tens of classes exist, and in capsule endoscopy, which suffers massive imbalance between the classes. This dissertation introduces RegBoost, a new boosting framework to address the imbalanced, multi-class problems. This method applies a weighted stratified sampling technique and incorporates a regularization term that accommodates multi-class data sets and automatically determines the error bound of each base classifier. The regularization parameter penalizes the classifier when it misclassifies instances that were correctly classified in the previous iteration. The parameter additionally reduces the bias towards majority classes. Experiments are conducted using 12 diverse data sets with moderate to high imbalance ratios. The results demonstrate superior performance of the proposed method compared …
Date: December 2013
Creator: Abouelenien, Mohamed
System: The UNT Digital Library
Bridging the Theory-to-practice Gap: a Multivariate Correlational Study Exploring the Effects of a Graduate Online Learning Environment As a Community of Practice Framework (open access)

Bridging the Theory-to-practice Gap: a Multivariate Correlational Study Exploring the Effects of a Graduate Online Learning Environment As a Community of Practice Framework

In this multivariate correlational study, the researcher examined the course culture of an online graduate course whose environment exhibited characteristics of a Community of practice (CoP). An online survey captured data used to explore the relationships among variables shown to describe a CoP in field environments and among student perceptions of their experience in the course culture. A canonical correlation analysis (CCA) and commonality analysis (CA) were conducted using five predictor variables and three criterion variables to evaluate the degree and direction of the relationships. The CCA revealed that the full model was significant, explaining approximately 74% of the variance among the two synthetic variates. Impact, faculty leadership, and connection were the largest contributors to the predictor variate. The criterion variate was primarily explained by value and perceived CoP, with exposure to the profession providing a smaller contribution. The CA confirmed these findings. Results from this study indicate that a CoP could be fostered in an online graduate course. The overall significance of the model indicates teachers can nurture an environment wherein graduate students will take the initiative to work with others to create and acquire knowledge that creates a sense of professional connection with each other and with the …
Date: December 2013
Creator: Bone, Tonda Jenean
System: The UNT Digital Library
Carbon Nanostructure Based Donor-acceptor Systems for Solar Energy Harvesting (open access)

Carbon Nanostructure Based Donor-acceptor Systems for Solar Energy Harvesting

Carbon nanostructure based functional hybrid molecules hold promise in solarenergy harvesting. Research presented in this dissertation systematically investigates building of various donor-acceptor nanohybrid systems utilizing enriched single walled carbon nanotube and graphene with redox and photoactive molecules such as fullerene, porphyrin, and phthalocyanine. Design, synthesis, and characterization of the donor-acceptor hybrid systems have been carefully performed via supramolecular binding strategies. Various spectroscopic studies have provided ample information in terms of establishment of the formation of donor-acceptor hybrids and their extent of interaction in solution and eventual rate of photoinduced electron and/or energy transfer. Electrochemical studies enabled construction of energy level diagram revealing energetic details of the possible different photochemical events supported by computational studies carried out to establish the HOMO-LUMO levels in the donor acceptor systems. Transient absorption studies confirmed formation of charge separated species in the donor-acceptor systems which have been supported by electron mediation experiments. Based on the photoelectrochemical studies, IPCE of 8% was reported for enriched SWCNT(7,6)-ZnP donor-acceptor systems. In summary, the present investigation on the various nanocarbon sensitized donor-acceptor hybrids substantiates tremendous prospect, that could very well become the next generation of materials in building efficient solar energy harvesting devices andphotocatalyst.
Date: December 2013
Creator: Das, Sushanta Kumar
System: The UNT Digital Library
A Case Study of 1:1 Technology Policies in Four Texas High Schools and Their Relationship to Practice (open access)

A Case Study of 1:1 Technology Policies in Four Texas High Schools and Their Relationship to Practice

With increasing emphasis on technology in schools, the importance of technology policies is great. This study investigated policies for four 1:1 secondary schools in Texas (schools with a ratio of one computing device per student), particularly with respect to the relationship of those policies to practice. The purpose of the study was to determine the current status of the National Education Technology Standards (NETS) essential conditions as reflected in policy and the relationship of those conditions to practice as measured through levels of technology usage and teaching innovation. Schools were selected through purposive, criterion sampling. Open-ended interviews were conducted with twelve participants (principals, technology directors, and superintendents). Policies were rated by campus principals and the researcher using a rubric based on the NETS essential conditions. Finally, surveys of proficiency and readiness measures were collected from 156 teachers using the School Technology and Readiness (STaR) instrument and the Levels of Teaching Innovation (LoTI) instrument. Interviews were transcribed and coded using structural and frequency coding. Policies were analyzed using magnitude coding and policy ratings. A qualitative analysis determined patterns between policy and practice. Quantitative data collected from surveys were measured against policy ratings and magnitude coding using bivariate correlation methods in SPSS. …
Date: December 2013
Creator: Bauter, Cynthia
System: The UNT Digital Library
Catered Learning: an Anthropological Approach to Understanding How Learning Styles of Participants and Teaching Styles of Instructors Affect Participants’ Perception, Motivation, and Performance (open access)

Catered Learning: an Anthropological Approach to Understanding How Learning Styles of Participants and Teaching Styles of Instructors Affect Participants’ Perception, Motivation, and Performance

Organizations rely on their training departments to deliver adequate training for effective use of knowledge on the job to new and tenured employees. The transfer of learned knowledge and skills yields many positive outcomes for the employees, the trainers, and the organization as a whole. Such outcomes include improved productivity and efficiency, increased morale, work enjoyment, improved customer service, and improved shareholder satisfaction. In order to achieve these outcomes, training departments must employ skilled training personnel knowledgeable about curriculum design and creative with training delivery and learning environments. These requirements implementation will depends heavily on the experience level of training professionals. Training professionals need to understand their own learning styles and how to appropriately utilize strategies to target the various learning styles that exist in the classroom. Instructors must constantly monitor the learning environment and be able to make immediate changes to meet the needs of the participants when necessary. Participants themselves play an integral role in the effective transfer of learning from the classroom to the job. Learners’ backgrounds, life experiences, and motivation to learn are important considerations for designing a positive learning experience. When training programs cater to learners’ preferred learning styles with an appropriate learning environment in …
Date: December 2013
Creator: Woodson-Mayfield, La Tonya R.
System: The UNT Digital Library
Churches, Social Service Access and Korean-american Elders: an Exploratory Study (open access)

Churches, Social Service Access and Korean-american Elders: an Exploratory Study

This study examined how Korean co-ethnic churches serve as connections between Korean seniors and the agencies that offer social and health care services. The study developed from a pilot outreach program funded by the North Central Texas Council of Governments’ Area Agency on Aging (NCTAAA) to inform Korean seniors about Medicare-related programs between February and May of 2011. The results of the pilot program suggested that the Korean-American church can be an effective place for program outreach. The dissertation project, working in partnership with the NCTAAA and 2-1-1 services, further explored the use of Korean churches as a vehicle to connect Korean seniors to Extra Help (EH) and Medicare Saving Programs (MSP) and 2-1-1 services, a toll-free number for information about non-emergency health and social services. Fifty-three pastors were contacted to participate in a telephone survey and a face-to-face, in-depth semi-structured interview. Thirty telephone surveys and 11 face-to-face interviews were conducted. Five of the 30 pastors agreed to host program outreach presentations for the EH, MSP, and 2-1-1 services in their churches. Host churches tended to be more likely highly structured, regularly scheduled programs (e.g., Senior College) for seniors already in place. A total of 405 Korean seniors participated in …
Date: December 2013
Creator: Kim, Eunkyung
System: The UNT Digital Library
A Comparison of Three Teacher Evaluation Methods and the Impact on College Readiness (open access)

A Comparison of Three Teacher Evaluation Methods and the Impact on College Readiness

Much attention in recent years has gone to the evaluation of teacher effectiveness, and some scholars have developed conceptual models to evaluate the effectiveness. The purpose of this study was to compare three teacher evaluation models – the Texas Professional Development Appraisal System (PDAS), the teacher index model (TI), and the value-added model (VAM) – to determine teacher effectiveness using student demographic and longitudinal academic data. Predictive data from students included economic disadvantage status, ethnicity, gender, participation in special education, limited English proficiency, and performance on Texas Assessment of Knowledge and Skills (TAKS). Data serving as dependent variables were scores from Scholastic Aptitude Test (SAT®) verbal/critical reasoning and mathematics. These data came from 1,714 students who were 9.7% Hispanic, 9.2% African American, and 81.2% White. The models were tested for 64 English language arts teachers and 109 mathematics teachers, using student examination scores from the SAT® verbal/critical reasoning and mathematics. The data were aligned for specific faculty members and the students whom they taught during the year of the study. The results of the study indicated that the TI and VAM explained approximately 42% of the variance in college entrance exam scores from the SAT® verbal/critical reasoning and mathematics (R2 …
Date: December 2013
Creator: Smalskas, Tamy L.
System: The UNT Digital Library
Correlates of Depression in Elderly Asians in the United States (open access)

Correlates of Depression in Elderly Asians in the United States

The primary purpose of this study was to examine the correlation between depression and the personal characteristics of Asians who are 50 years or older. The secondary objective was to determine whether Asians 50 years or older living in the United States are more likely to be depressed than other ethnicities. The information for this study was secured from the National Health Interview Survey, spanning the years 2001 to 2010. In this study, I utilized the SAS-Callable SUDAAN statistical system. Multivariate regression was used to predict and determine significant correlations. The results indicated that Asians 50 and older living in the U.S. and who experience functional limitations, poor vision, hypertension, poor health, not married, and unemployed in previous year were in general more prone to depression. Furthermore, the study indicated that Asian elderly living the U.S. showed lower rates of depression than all non- Asian ethnicities. However when controlled for personal characteristics only Whites and Hispanics had higher depression incidences than Asian elderly. Recommendations for future studies include: conducting more micro and macro studies of Asian elders, such as in-depth case studies for each ethnicity, longitudinal studies of various Asian subgroups, and studies of Asian elderly with hypertension who have …
Date: December 2013
Creator: Kung, Kevin Hsiang-Hsing
System: The UNT Digital Library
A Descriptive Analysis of the Critical Thinking Model in Texas Elementary Education (open access)

A Descriptive Analysis of the Critical Thinking Model in Texas Elementary Education

Contributions from elementary education to the practice and reality of critical thinking are rare, largely because attempts in basic education to elucidate a concept of critical thinking have a hard time breaking through the elusiveness and indeterminacy that characterize the history and reality of the concept. This situation is due to, and a consequence of, the difficulty of delimiting critical thinking from related fields, such as metacognition, higher-order-thinking, problem solving, informal logic, reasoning skills, and decision making, to name a few. Texas school authorities designed and put into practice a battery of tools to evaluate critical thinking through the assessment programs TAKS and STAAR, without taking a position regarding the indeterminacy problems of the content of critical thinking. The purpose of this study was to reconstruct the pieces of the critical thinking model imparted to Texas elementary school children since 1999 and continues today. The findings indicate that the critical thinking model implemented in Texas elementary schools is a particular version of a skills-only approach of critical thinking that follows the classical logical paradigm, consisting of two sets of complementary skills. This model acquaints students with the components and structure of five types of arguments while it fails to substantiate …
Date: December 2013
Creator: Quijano, Oswaldo Jorge
System: The UNT Digital Library
Diaspora Philanthropy: Identity and Obligation Among Indian Engineers in the United States (open access)

Diaspora Philanthropy: Identity and Obligation Among Indian Engineers in the United States

Diaspora philanthropy to India has grown rapidly over the past several decades. However, little is known about the motivations of Indians living in the U.S. to donate philanthropically to India. Extant studies have either focused on quantitative analysis of diaspora philanthropy or qualitative research on the receiving of diaspora philanthropy in India. The motivations and strategies of the Indian diaspora in the U.S. have not been explored, particularly, the informal mechanisms and strategies of making philanthropic donations to India and the obligations that underlie the practice of diaspora philanthropy remain neglected in the existing studies on diaspora philanthropy. My research addressed this gap in the existing literature on diaspora philanthropy by conducting qualitative face-to-face in-depth interviews with a snowball sample of 25 Indian engineers in San Diego, California. In my study, it was found that Indians preferred to channel funds for philanthropy in India through friends and family because of lack of trust in formal organizations and greater confidence in the activities of friends and family in India due to familiarity and better accountability. It was also found that Indians felt indebted to Indian society and the Indian nation-state for the free and subsidized education they had received in India, …
Date: December 2013
Creator: Batra, Shikha
System: The UNT Digital Library
Dynamic Adhesion and Self-cleaning Mechanisms of Gecko Setae and Spatulae (open access)

Dynamic Adhesion and Self-cleaning Mechanisms of Gecko Setae and Spatulae

Geckos can freely climb on walls and ceilings against their body weight at speed of over 1ms-1. Switching between attachment and detachment seem simple and easy for geckos, without considering the surface to be dry or wet, smooth or rough, dirty or clean. In addition, gecko can shed dirt particles during use, keeping the adhesive pads clean. Mimicking this biological system can lead to a new class of dry adhesives for various applications. However, gecko’s unique dry self-cleaning mechanism remains unknown, which impedes the development of self-cleaning dry adhesives. In this dissertation we provide new evidence and self-cleaning mechanism to explain how gecko shed particles and keep its sticky feet clean. First we studied the dynamic enhancement observed between micro-sized particles and substrate under dry and wet conditions. The adhesion force of soft (polystyrene) and hard (SiO2 and Al2O3) micro-particles on soft (polystyrene) and hard (fused silica and sapphire) substrates was measured using an atomic force microscope (AFM) with retraction (z-piezo) speed ranging over 4 orders of magnitude. The adhesion is strongly enhanced by the dynamic effect. When the retraction speeds varies from 0.02 µm/s to 156 µm/s, the adhesion force increases by 10% ~ 50% in dry nitrogen while …
Date: December 2013
Creator: Xu, Quan
System: The UNT Digital Library
The Effect of It Process Support, Process Visualization and Process Characteristics on Process Outcomes (open access)

The Effect of It Process Support, Process Visualization and Process Characteristics on Process Outcomes

Business process re-engineering (part of the Business Process Management domain) is among the top three concerns of Information Technology (IT) leaders and is deemed to be one of many important IT leveraging opportunities. Two major challenges have been identified in relation to BPM and the use of IT. The first challenge is related to involving business process participants in process improvement initiatives using BPM systems. BPM technologies are considered to be primarily targeted for developers and not BPM users, and the need to engage process participants into process improvement initiatives is not addressed, contributing to the business-IT gap. The second challenge is related to potential de-skilling of knowledge workers when knowledge-intensive processes are automated and process knowledge resides in IT, rather than human process participants. The two identified challenges are not separate issues. Process participants need to be knowledgeable about the process in order to actively contribute to BPM initiatives, and the loss of process knowledge as a result of passive use of automated systems may further threaten their participation in process improvement. In response to the call for more research on the individual impacts of business process initiatives, the purpose of this dissertation study is to understand the relationship …
Date: December 2013
Creator: Al Beayeyz, Alaa
System: The UNT Digital Library
The Effect of Stock Splits on Small, Medium, and Large-sized Firms Before and After Decimalization (open access)

The Effect of Stock Splits on Small, Medium, and Large-sized Firms Before and After Decimalization

This study examines the impact of reducing tick size and, in particular decimalization on stock splits. Based on previous studies, this study examines hypotheses in the following three areas: first, market reaction around stock split announcement and ex-dates, second, the effect of tick size on liquidity after stock split ex-dates, and third, the effect of tick size on return volatility after stock split ex-dates. The impact of tick size on market reaction around split announcement and ex-dates is measured by abnormal returns and buy and hold abnormal returns (BHARs). Also, this study investigates the long term impact of decimalization on market reaction for small, medium, and large firms for the three different tick size periods. The effect of tick size on liquidity after stock split ex-dates is measured by turnover, relative bid ask spread, and market maker count. The effect of tick size on return volatility around stock split announcement and ex-dates is measured by return standard deviation. Also, this study investigates the long term impact of decimalization on volatility after split ex-dates for small, medium, and large firms for three different tick size periods.
Date: December 2013
Creator: Jang, Seon Deog
System: The UNT Digital Library
Evaluating the Cultural Plan of Austin, Texas (open access)

Evaluating the Cultural Plan of Austin, Texas

This is a concurrent, mixed methods study of the impacts of Austin, Texas’s cultural plan, CreateAustin. In the study, trend analysis and a t-test were used to examine variables before and after the cultural plan was in place. At the same time, interviews with cultural planners were used to uncover other effects. My research addresses a gap in the literature between understanding the desired and actual outcomes of a cultural plan. Cultural plans are being developed by many communities in an effort to attract creative workers but they are rarely evaluated. Evaluation using a mixed methods approach is necessary to capture all the outcomes of a cultural plan, rather than the limited scope of impacts that are captured by qualitative or quantitative analyses alone. My analysis of the quantitative variables showed some significant differences between when the plan was in place and the years prior to its creation. Interviews with key stakeholders revealed the formation of new networks as a powerful outcome of the planning process. The results allowed me to gauge the overall impact of CreateAustin and make some observations about the cultural planning process in general, as well as uncover new directions for future research.
Date: December 2013
Creator: Smith, Rachel May
System: The UNT Digital Library
An Examination of Innovations in Alexander Scriabin’s Late Etudes for Piano (open access)

An Examination of Innovations in Alexander Scriabin’s Late Etudes for Piano

Alexander Scriabin (1872-1915) stands as one of the most unconventional twentieth-century Russian composers, particularly with respect to his piano works. The overwhelming majority of Scriabin's compositions—sixty-seven of his seventy-four published works—were written for solo piano. His etudes from 1905 forward are revolutionary, especially compared with his earlier Chopinesque style. Among Scriabin’s twenty-six etudes, his Op.49, No. 1 (1905), Op.56, No. 4 (1908) and the last three etudes of Op.65 (1912) date from his last period of composition. In the Op.49 etude, Scriabin started to abandon traditional tonality. He omitted the key signature altogether in the Op.56 etude. The final three etudes of Op.65 feature constant dissonances on ninths, sevenths and fifths. Alexander Scriabin’s last five etudes represent the culmination of his compositional development and innovations at the piano. Several factors coalesce in these etudes, including unusual harmony, bichords, non-tonal hierarchy, and structural symmetry. Most of these factors derive in some fashion from Scriabin’s increasing reliance upon the so-called “mystic chord” in his late works. This study will illustrate how Scriabin explored new sonorous and aesthetic ideas in his late etudes by means of these innovations.
Date: December 2013
Creator: Lee, Kuo-Ying
System: The UNT Digital Library
An Examination of Mathematics Teachers’ Use of Student Data in Relationship to Student Academic Performance (open access)

An Examination of Mathematics Teachers’ Use of Student Data in Relationship to Student Academic Performance

Among educational researchers, important questions are being asked about how to improve mathematics instruction for elementary students. This study, conducted in a north Texas public school with 294 third- through fifth-grade students, ten teachers and three coaches, examined the relationship between students’ achievement in mathematics and the mathematics teaching and coaching instruction they received. Student achievement was measured by the Computer Adaptive Instrument (CAT), which is administered three times a year in the district and is the main criterion for students’ performance/movement in the district’s response to intervention program for mathematics. The response to intervention model employs student data to guide instruction and learning in the classroom and in supplemental sessions. The theoretical framework of the concerns based adoption model (CBAM) was the basis to investigate the concerns that mathematics teachers and coaches had in using the CAT student data to inform their instruction. The CAT data, based on item response theory, was the innovation. Unique in this study was the paralleling of teachers’ and coaches’ concerns and profiles for their use of the data with student scores using an empirical approach. Data were collected at three intervals through the Stages of Concerns Questionnaire, the Levels of Use interviews, and …
Date: December 2013
Creator: Hartmann, Lillian Ann
System: The UNT Digital Library
Examining High School Coaches’ Likelihood to Refer To, Interest in Working With, and Plans to Hire a Sport Psychologist (open access)

Examining High School Coaches’ Likelihood to Refer To, Interest in Working With, and Plans to Hire a Sport Psychologist

The primary goal of the current study was to extend previous research suggesting that coaches are the primary gatekeepers who may be a barrier to working with athletes by examining high school coaches likelihood to refer to, interest in, and intention to hire a sport psychologist. Specifically, the current study examined relationships between high school coaches’ sex, age, and type of sport coached (i.e., contact vs. non-contact) and their likelihood to refer athletes to a sport psychologist for a variety of presenting issues (i.e., poor attentional focus, poor leadership, family issues, etc.). It also examined relationships between coaches’ sex, age, and type of sport coached (i.e., contact vs. non-contact) and their interest in working with a sport psychologist. Finally, the study examined reasons why coaches did not plan to hire a sport psychologist. An examination of the possible reasons that high school coaches do not plan to hire a sport psychologist served an exploratory purpose. Participants included 450 coaches who coached high school sports in the United States. Results indicated that female coaches and non-contact sport coaches were more likely to refer athletes to a sport psychologist for a variety of referral issues than male coaches and coaches of contact …
Date: December 2013
Creator: Austin, Harlan
System: The UNT Digital Library
The Extent of Autism Knowledge of Novice Alternatively Certified Special Education Teachers in Texas (open access)

The Extent of Autism Knowledge of Novice Alternatively Certified Special Education Teachers in Texas

An increase in the prevalence rate of autism is not necessarily matched by a concurrent increase in the rate of highly qualified special education teachers. The low ratio of highly qualified teachers to the number of students with autism has resulted in chronic teacher shortages in this area. Alternative certification is used as a mechanism to alleviate the demand for highly qualified teachers in special education. However, alternative certification routes have often left novice teachers underprepared for teaching students with autism, more specifically in the implementation of evidence-based practices necessary for instructional effectiveness. The purposes of the study were: a) to assess the knowledge of novice alternatively certified (AC) teachers in the area of autism education; and b) to determine the extent to which age, credit hours of instruction, formal hours of instruction, amount of professional development, and number of students with autism predict the variance in knowledge scores. Participants included all novice (i.e., first-and second-year) alternatively certified special education teachers in the state of Texas. Data were collected through an electronic survey instrument disseminated state-wide to approximately 33 individuals. Multiple regression was conducted in order to determine the strongest predictors of autism knowledge scores. In addition, a multi-way ANOVA …
Date: December 2013
Creator: Alward, Jennifer A.
System: The UNT Digital Library
Field and Laboratory Fish Tissue Accumulation of Carbamazepine and Amiodarone (open access)

Field and Laboratory Fish Tissue Accumulation of Carbamazepine and Amiodarone

The goals of this dissertation work were to assess the bioaccumulation potential of carbamazepine and amiodarone, two widely used ionizable pharmaceutical compounds that possess mid-range and high LogD values, respectively, and to evaluate alternative methods to assess chemical accumulation in bluntnose minnows, catfish, and tilapia. Results indicated that carbamazepine does not appreciably bioaccumulate in fish tissue with BCFk and BAF carbamazepine values < 10. Amiodarone, however, with a log D of 5.87 at pH 7.4, accumulated in fish tissues with kinetic BCF values <2,400. Collectively, the data suggest that full and abbreviated laboratory-derived BCFs, BCFMs derived from S9 loss-of-parent assays, as well as field BAF values are similar for each of the two drugs. In summary, the results from this dissertation indicated: 1) The reduced design BCF test is a good estimate for the traditional OECD 305 test. 2) In vitro S9 metabolism assays provide comparable BCF estimates to the OECD 305 test. 3) Metabolism may play a large role in the accumulation of drugs in fish. 4) Reduced BCF tests and in vitro assays are cost effective and can reduce vertebrate testing.
Date: December 2013
Creator: García Martínez, Santos Noé
System: The UNT Digital Library