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An Exploratory Study of Victim Reactions to Two Disasters
List of tables -- List of illustrations -- Chapter I. Disasters and disaster relief -- Chapter II. Disasters in Dallas -- Chapter III. Imminent danger -- Chapter IV. Pre-disaster help -- Chapter V. After-effects of the disasters -- Chapter VI. Summary and conclusions. digital.library.unt.edu/ark:/67531/metadc663634/
Exploring a Community Partnership: A Narrative Inquiry into the 2004-2006 Semester Programs Between Artpace San Antonio and Louis W. Fox Academic and Technical High School
This qualitative inquiry explores a community-based art partnership called the semester programs that took place between Artpace San Antonio and Louis W. Fox Academic and Technical High School from 2004 until 2006. This narrative inquiry used interviews with artists and former Fox Tech art students involved in our program, along with my teacher/ researcher reflections, to make meaning from the data. The artists involved in the semester programs were Gary Sweeney, Daniel Guerrero, David Jurist, and Ethel Shipton. Former students interviewed include Eloy McGarity, Rosa Leija, John Contreras, and Jennelle Gomez, while I, Maria Leake represent the voice of the art teacher. Our stories of experience were analyzed and connections between situated learning theory, creativity theories, community-based art education, and memory research were all recognized as being exhibited during our community partnership programs. There were seven patterns and themes that were noted as occurring within each semester program, as well as notable distinctions. The patterns and themes from the data analysis suggest that our community partnership reflected the following: learning and creative expression went beyond the individual; networks of support and communication were available to all participants; challenges were acknowledged; empathy between participants was an unintentional outcome; working together as a community of practice facilitated personal interactions and connections; learning and creative expression went beyond the traditional curriculum; and educational benefits were realized by all participants. digital.library.unt.edu/ark:/67531/metadc33130/
Exploring Aspects of Korean Traditional Music in Young Jo Lee's Piano Honza Nori
Since the 1960s, several gifted Korean composers, including perhaps most notably Young Jo Lee (b. 1943), have been internationally acclaimed for their work. In Western countries, however, there has been a scarcity of academic studies examining the artistry of the music of these Korean composers. Nonetheless, as one of today's most recognized composers in Korea, Young Jo Lee has been invited to numerous international concerts, conferences, and festivals where his works have been played and discussed. A salient feature of his compositions is the fusion of Korean traditional music and the elements of Western compositions, such as in, for one distinctive example, his piano composition, Piano Honza Nori. This musical study describes and analyzes how Lee integrates Korean traditional elements with Western musical ideas in Piano Honza Nori. Results of this study will contribute to the limited literature on the analysis of contemporary piano composition that integrates Korean traditional elements. digital.library.unt.edu/ark:/67531/metadc283809/
Exploring Critical Factors in Predicting Post-Adoptive Use of Facebook
Social networking applications (SNAs) have experienced a boom in popularity in recent years. Sites like Facebook and MySpace continuously draw new users, and are successful in organizing groups of users around topics of common interest. Among SNAs, Facebook has demonstrably outgrown its rivals growing an estimated 157 percent from 2008 to 2009. Facebook is now estimated to be the fourth largest Internet site in the world, trailing only Google, Microsoft and Yahoo (Schonfeld 2009). This dissertation posits and tests a theoretical model composed of key factors that contribute to post-adoptive use of social networking applications and the relationship of those factors to one another. This study also identifies and clarifies new constructs that were not previously used to measure usage, and further refines the constructs that were previously used so that they better fit social networking applications. The results of this dissertation show that the critical factors of social capital, hedonic enjoyment, perceived usefulness, social influence, satisfaction and attitude have a positive influence on a post-adoptive user's intention to continue using Facebook. The results of this study yielded a structural model for predicting the post-adoptive use of Facebook. This work also developed an instrument for measuring constructs relevant to social networking applications. digital.library.unt.edu/ark:/67531/metadc68007/
Exploring Factors That Lead to Perceived Instructional Immediacy in Online Learning Environments
Instructional communication research clearly indicates that instructor immediacy contributes significantly to effective instruction. However, the majority of immediacy studies have been conducted in traditional (face-to-face) classroom environments. More recently, instructional communication research has focused on assessing the impact of immediacy in online classroom environments. Again, immediacy appears to significantly contribute to effective instruction. The challenge is that most recent immediacy studies use immediacy measurements developed to test immediacy behaviors in face-to-face settings. Considering the lack of nonverbal communication and limited or absent synchronous or verbal communication in online instructional settings, the behaviors contributing most significantly to perceived immediacy, researchers need to reassess the immediacy construct in online environments. The present research explores and identifies behaviors reported by instructors to establish psychological closeness (i.e., immediacy) in online learning environments and assesses to what extent these behaviors are similar to or different from face-to-face immediacy-producing behaviors. digital.library.unt.edu/ark:/67531/metadc699980/
Exploring Fear and Freud's The Uncanny
Fear is one of the oldest and most basic of human emotions. In this thesis, I will explore the topic of fear in relation to literature, both a staple of the horror genre as well as a device in literary works, as well as in my own writings. In addition, I will use Sigmund Freud's theory of the “uncanny” as a possible device to examine the complexities of fear and its effects both on the mind and body through the medium of literature, and, more specifically, where and how these notions are used within my own short stories. By exploring how and why certain fears are generated, we may be able to better examine our own reactions in this regard. digital.library.unt.edu/ark:/67531/metadc3666/
Exploring flow among Division I and intramural athletes.
This study explores the flow experiences of collegiate athletes. NCAA Division I athletes and intramural athletes (N = 180) completed a series of measures on their flow experiences. Comparisons were made regarding the characteristics of flow, the perceived facilitators of flow, the frequency of flow experiences, and explored the role of perceived ability. Using a person by situation interaction framework, this study singles out perceived ability as a person factor and competitive level as a situational factor to more clearly examine flow experiences. Results indicated distinctions between the two groups. Mainly, the intramural athletes reported experiencing the merging of action and awareness, autotelic experience, transformation of time and having clear goals more frequently than the NCAA Division I athletes. No group differences were found for flow frequency or flow facilitators. Perceived ability was found to have a weak, but significant relationship with specific flow facilitators and characteristics. digital.library.unt.edu/ark:/67531/metadc4494/
Exploring Fundamental Principles in the Study of Derived Relational Responding in Pigeons
A persistent challenge for behaviorally-based accounts of learning has been providing an account of learning that occurs in the absence of systematically programmed contingencies of reinforcement. Symmetry, one type of emergent behavior, has been repeatedly demonstrated with humans, but has been considerably more difficult to demonstrate with non-humans. In this study, pigeons were exposed to a go/no-go procedure in which hue stimuli were presented full screen on a touchscreen monitor. Pigeons learned 12 baseline relations in less than 30 days. Traditional measures used to evaluate symmetry indicated that, during tests, three of the four birds responded more to the reverse of relations that were reinforced in training than to the reverse of relations that were not reinforced in training. However, additional analyses of these data suggests that these differences were driven by one of two trial types and that symmetry was only observed for one of the two predicted relations. These data systematically replicate and extend work by Urcuioli and colleagues and point to areas where further research is needed. digital.library.unt.edu/ark:/67531/metadc500069/
Exploring General Education Pre-service Teachers’ Levels of Concern Regarding the Implementation of Response to Intervention
Schools are increasingly challenged to respond to educational initiatives, implement accountability measures, and incorporate standards-driven curriculum changes introduced by laws such as the Individuals with Disabilities Education Improvement Act (IDEIA) of 2004. IDEIA signified a shift in the field of education and intensified practitioners’ concerns about the identification and instruction of students with learning disabilities (LD). The revisions to IDEIA proposed alternative models for the evaluation and identification of students with LD, such as response to intervention (RTI). RTI is an educational framework that supports students at-risk for academic failure by focusing on preventative measures. As teachers’ roles evolve in response to innovations such as RTI, teacher preparation programs must adjust their focus and curriculum accordingly. A parallel mixed-methods design was used to explore 100 general education pre-service teachers’ levels of concern regarding the implementation of RTI based on the concerns based adoption model. The sample for the study integrated general education pre-service teachers enrolled in professional development schools (PDS) at two levels of candidacy, PDS1 and PDS2. Data collected was analyzed utilizing canonical correlation analysis (CCA), multivariate analysis of variance (MANOVA), descriptive statistics, and thematic analysis. Results explain general education pre-service teachers’ levels of knowledge had a negative relationship with the levels of concern, as these appeared to be higher due to teacher candidates’ lack of knowledge. Qualitative findings supported this statement. Contributions to the literature are presented and may guide teacher preparation programs as they assess the readiness of their pre-service teachers to effectively implement RTI. digital.library.unt.edu/ark:/67531/metadc500138/
Exploring Hidden Student Perceptions About College-going Culture At House Bill 400 Schools In The Dallas Fort Worth Metroplex
In accordance with the Texas Higher Education Coordinating Boards’ Closing the Gaps by 2015, this research study analyzed self-reported perceptions about college-going culture from students (n = 151) who attended four House Bill 400 schools serving Latino and African American communities in the Dallas-Fort Worth Metroplex. This study utilized exploratory factor analysis (EFA) with a maximum likelihood extraction technique to identify hidden perceptions (latent factors) that account for common variance among student perceptions about college-going culture. The study also tested the validity and inter-item reliability of the 15-item College-Going Culture Survey used in data collection. The parallel analysis, EFA, and Cronbach’s ? identified two latent factors of Verified College Potential (? = .70) and College Capital Awareness (? = .71) that, together, explained 40.1% of students’ perceptions. The two factors were non-significantly negatively correlated (r = -.495, p = .354). By utilizing the two latent constructs, a 10-item revised College-Going Culture Survey is recommended to improve the inter-item reliability coefficient from ? = .46 to ? = .77. Descriptive statistics revealed that Latino and African-American students affirmed aspects of the college-going culture at HB 400 schools. However, latent factors suggest the possibility that students who reportedly feel most encouraged to attend college (Verified College Potential) may tend to be least aware of the actual logistics of college such as admissions processes and financial aid (College Capital Awareness) and that, conversely, those with the most logistical knowledge may tend to feel least encouraged. digital.library.unt.edu/ark:/67531/metadc103410/
Exploring job related stress and job satisfaction in a modern law enforcement communications division.
One of the most neglected areas of criminological and social science research is the police communications or dispatch center. While research projects dealing with stress and job satisfaction are found in abundance for other occupations, studies specific to the police dispatcher are uncommon. The role of the dispatcher has changed significantly in the last few decades. Improvements in technology and changes in public expectations of emergency services have forever altered the communications professional. Dispatchers work in an environment reliant on information. There is tremendous pressure to process the information coming into a communications center quickly and correctly. A mistake could prove fatal. Work pressures, burnout, high employee turnover, low pay, and a lack of respect from police coworkers can easily result in negative emotional and psychological consequences for the dispatcher. An effective manager could reduce the feelings of stress and low job satisfaction this environment can facilitate. The current study utilizes survey data from a sample of police dispatchers and their managers in the Dallas/Fort Worth, Texas area. The purpose of the survey is to identify the level of stress and job satisfaction reported by the dispatchers and their managers. The effects of differing types of stress will be investigated. Other relationships such as length of service, education, gender, ethnicity, and agency size will also be addressed. digital.library.unt.edu/ark:/67531/metadc5564/
Exploring Lifestyle Orientation, Attitudes Toward Lifestyle Merchandising, and Attitudes Toward Lifestyle Advertising as Predictors of Behavioral Intention to Purchase Lifestyle Home Furnishing Products
A number of lifestyle merchandising and advertising strategies are being used in the home furnishings industry. However, there is limited research regarding the effectiveness of these strategies. The purpose of this study was to explore consumers' attitudes toward the lifestyle concept. Analyses of several consumer behavior variables and descriptors offered noteworthy findings for the home furnishings industry. This study found that although lifestyle orientation is a valuable tool for delineating consumer markets, these segmentations were not significant determinates of consumers' preference for elements of the lifestyle construct. Retailers and manufacturers are not simply creating home furnishing collections that target the needs of specific psychographic segment, but rather creating lifestyles being aspired to obtain. Although respondents scored the attitude variables neutral, the current market environment offers many examples of successfully home furnishing implementations of the lifestyle concept. These success stories coupled with additional findings indicate consumers' positive response to lifestyle merchandising. digital.library.unt.edu/ark:/67531/metadc4743/
Exploring Memristor Based Analog Design in Simscape
With conventional CMOS technologies approaching their scaling limits, researchers are actively investigating alternative technologies for ever increasing computing and mobile demand. A number of different technologies are currently being studied by different research groups. In the last decade, one-dimensional (1D) carbon nanotubes (CNT), graphene, which is a two-dimensional (2D) natural occurring carbon rolled in tubular form, and zero-dimensional (0D) fullerenes have been the subject of intensive research. In 2008, HP Labs announced a ground-breaking fabrication of memristors, the fourth fundamental element postulated by Chua at the University of California, Berkeley in 1971. In the last few years, the memristor has gained a lot of attention from the research community. In-depth studies of the memristor and its analog behavior have convinced the community that it has the potential in future nano-architectures for optimization of high-density memory and neuromorphic computing architectures. The objective of this thesis is to explore memristors for analog and mixed-signal system design using Simscape. This thesis presents a memristor model in the Simscape language. Simscape has been used as it has the potential for modeling large systems. A memristor based programmable oscillator is also presented with simulation results and characterization. In addition, simulation results of different memristor models are presented which are crucial for the detailed understanding of the memristor along with its properties. digital.library.unt.edu/ark:/67531/metadc271817/
Exploring Naming Behavior in Personal Digital Image Collections: the Iconology and Language Games of Pinterest
As non-institutional digital image collections expand into social media, independent non-professional image curators are emerging, actively constructing alternative naming conventions to suit their needs in a social collecting environment. This project considers how independent user-curators are developing particular sense-making behaviors as they actively contribute names to large, unstructured social image collections. In order to capture and explore this evolving language adaptation, Pinterest names are analyzed using a matrix composed of Panofsky’s three strata of subject matter, Rosch’s levels of categorical abstraction, Shatford Layne’s image attributes and Wittgenstein’s language game constructions. Analyzing Pinterest image names illuminates previously unnoticed behaviors by independent user-curators as they create shared collections. Exploring the various language choices which user-curators select as they apply this new curating vocabulary helps identify underlying user needs not apparent in traditionally curated collections restricted to traditional naming conventions. digital.library.unt.edu/ark:/67531/metadc699943/
Exploring Privacy in Location-based Services Using Cryptographic Protocols
Location-based services (LBS) are available on a variety of mobile platforms like cell phones, PDA's, etc. and an increasing number of users subscribe to and use these services. Two of the popular models of information flow in LBS are the client-server model and the peer-to-peer model, in both of which, existing approaches do not always provide privacy for all parties concerned. In this work, I study the feasibility of applying cryptographic protocols to design privacy-preserving solutions for LBS from an experimental and theoretical standpoint. In the client-server model, I construct a two-phase framework for processing nearest neighbor queries using combinations of cryptographic protocols such as oblivious transfer and private information retrieval. In the peer-to-peer model, I present privacy preserving solutions for processing group nearest neighbor queries in the semi-honest and dishonest adversarial models. I apply concepts from secure multi-party computation to realize our constructions and also leverage the capabilities of trusted computing technology, specifically TPM chips. My solution for the dishonest adversarial model is also of independent cryptographic interest. I prove my constructions secure under standard cryptographic assumptions and design experiments for testing the feasibility or practicability of our constructions and benchmark key operations. My experiments show that the proposed constructions are practical to implement and have reasonable costs, while providing strong privacy assurances. digital.library.unt.edu/ark:/67531/metadc68060/
Exploring Process-Variation Tolerant Design of Nanoscale Sense Amplifier Circuits
Sense amplifiers are important circuit components of a dynamic random access memory (DRAM), which forms the main memory of digital computers. The ability of the sense amplifier to detect and amplify voltage signals to correctly interpret data in DRAM cells cannot be understated. The sense amplifier plays a significant role in the overall speed of the DRAM. Sense amplifiers require matched transistors for optimal performance. Hence, the effects of mismatch through process variations must be minimized. This thesis presents a research which leads to optimal nanoscale CMOS sense amplifiers by incorporating the effects of process variation early in the design process. The effects of process variation on the performance of a standard voltage sense amplifier, which is used in conventional DRAMs, is studied. Parametric analysis is performed through circuit simulations to investigate which parameters have the most impact on the performance of the sense amplifier. The figures-of-merit (FoMs) used to characterize the circuit are the precharge time, power dissipation, sense delay and sense margin. Statistical analysis is also performed to study the impact of process variations on each FoM. By analyzing the results from the statistical study, a method is presented to select parameter values that minimize the effects of process variation. A design flow algorithm incorporating dual oxide and dual threshold voltage based techniques is used to optimize the FoMs for the sense amplifier. Experimental results prove that the proposed approach improves precharge time by 83.9%, sense delay by 80.2% sense margin by 61.9%, and power dissipation by 13.1%. digital.library.unt.edu/ark:/67531/metadc67942/
Exploring Psychopathic Personality Traits and Moral Development in a Non-criminal Sample
This study explored psychopathic personality traits among a non-criminal, college undergraduate sample. Much research has been done on conceptualizing the construct of psychopathy, but this work has been conducted primarily with incarcerated individuals using a structured interview, The Psychopathy Checklist – Revised (PCL-R; Hare, 1991, 2003). The goal of the current study was to assess psychopathic traits among non-criminal individuals using The Self-Report Psychopathy Scale - Version Four (SRP-IV; Paulhus, Neumann, & Hare, in press), and compare how SRP-IV scores were associated with a well recognized semi-structured interview for psychopathy, The Psychopathy Checklist – Screening Version (PCL: SV; Hart, Cox, & Hare, 1995). The study also examined whether psychopathic personality traits could be predicted using a measure of normal-range personality, based on the five-factor model (FFM; Digman, 1990), and a measure developed by Loevinger (1976) related to ego development. Five-Factor Model Rating Form (FFMRF; Mullins-Sweat, Jamerson, Samuel, Olson, & Widiger, 2006) scores and Total Protocol Ratings (TPR score) on the Washington University Sentence Completion Test (WUSCT; Hy & Loevinger, 1996) were used to predict psychopathy scores. Correlations of SRP-IV scores and PCL: SV scores with FFMRF scores and WUSCT TPR scores were also examined for their uniformity. As predicted, there were significant, negative correlations between FFM domains, Agreeableness and Conscientious, and SRP-IV scores, as well as significant, negative correlations between WUSCT TPR scores and SRP-IV scores. These correlations ranged from small to strong for both SRP-IV overall scores and for SRP-IV factor scores (i.e., Interpersonal Manipulation, Callous Affect, Erratic Lifestyle, and Criminal Tendencies). Additionally, FFM domain scores and WUSCT TPR scores significantly predicted SRP-IV scores. FFM domains, Agreeableness and Conscientiousness, and WUSCT TPR scores, were the strongest predictors of SRP-IV scores. Similar results were found when FFM domain scores and WUSCT TPR scores predicted SRP-IV factor scores. Results also indicated Agreeableness and Conscientious explained an additional 24% of the variance in psychopathy scores, after controlling for WUSCT TPR scores. Conversely, WUSCT TPR scores explained an additional 5% of the variance in psychopathy scores after controlling for Agreeableness and Conscientiousness. Finally, as predicted, the differences in correlations between psychopathy scores (i.e., PCL: SV, SRP-IV), and Agreeableness, Conscientiousness, and WUSCT TPR scores were not statistically significant providing evidence that correlates of psychopathic traits can be measured among non-criminal individuals using a self-report measure, the SRP-IV, and that these findings are concordant with those based on a standardized structured assessment for psychopathy. Limitations of the study, implications, and recommendations for future research are also discussed. digital.library.unt.edu/ark:/67531/metadc271780/
Exploring Relationships Between Recalled Parenting and Anaclitic and Introjective Depression
This study related college students' remembered early relationships with parents to their depression symptoms and to dependent and self-critical subjective feelings. Undergraduates (N = 217, 118 female, 99 male) provided information regarding their current level of depression, overall functioning, subjective feelings of depression (Depressive Experiences Questionnaire), negative thoughts, interpersonal functioning, and recollections of their parents' behavior and attitudes. Depression symptoms were related to dependent and self-critical feelings and to recalled low parental care and high parental control. However, for women, paternal affection and, for men, paternal control, were unrelated to depression symptoms. Other results are inconclusive but, overall, provide evidence for the usefulness of Blatt's theory in assessing depression via dependent and self-critical subjective feelings. digital.library.unt.edu/ark:/67531/metadc2490/
Exploring Spontaneous Planning During the North Texas April 3, 2012, Tornadoes: an Assessment of Decision-making Processes
The primary purpose of this research program is to confirm the spontaneous planning behavior in post-disaster operations while at the same time contribute to the development of the concept in a tornado type disaster. An additional goal also includes examining how the process takes place in resolving unanticipated problems as a disaster unfolds. This study uses qualitative methodology which is case study to probe the concept of spontaneous planning behavior to solve unexpected challenges as a disaster develops. Specifically, semi-structured, open-ended questions were utilized to collect data from stakeholders in eleven functional organizations in three impacted cities during the North Texas April 3, 2012, tornadoes. Findings indicate that debris removal and ensuring public safety, search and rescue, securing damaged neighborhoods, activation of emergency operations centers, damage assessment, restoration of communication system, public relations and media, and volunteer and donation management activities appear to have benefited from spontaneous planning behavior. Further findings suggest that the driving forces behind the phenomenon were gathering valuable new information, learning opportunity within the disaster, relative freedom and significant high degree of discretion, response was innovative with flexibility, and solutions waiting for problems features proposed in the integrated decision-making model (IDMM). However, it was uncovered that interview respondents’ answers tend to indicate that mixed organizational structures helped in problem resolutions rather than just flat organizational structure as some decision making literature may suggest. Analysis of this decision-making model expanded the understanding of how spontaneous planning behavior took place in resolving unforeseen problems in post-disaster operations. This research project confirmed the concept of spontaneous planning in the North Texas tornadoes as well as suggesting how it occurred. The research program validates spontaneous planning behavior in tornadoes; advances and develops the concept of spontaneous planning; increases understanding, description, and management of post-disaster operations; improves emergency management operations; promotes spontaneous planning as a key principle among responders and others involved in emergency management; and proposes IDMM as a useful model that explains decision-making behavior during a disaster. digital.library.unt.edu/ark:/67531/metadc700105/
Exploring Student Learning on a Short-term, Faculty-led Study Abroad Course Through a Student Development Lens
Embarking on a study abroad experience is thought to be a transformational experience for students, and previous researchers have tended to find that the potential benefits of study abroad experiences, including greater conceptual and behavioral intercultural competence, are greater with longer periods abroad. The purpose of this study was to create an intentional learning experience for students who embarked on a short-term study abroad in rural areas of China and to apply faculty intervention of a student development approach to student learning to create a high-impact learning environment for students centered on a service-learning project. This qualitative study gathered primary data from students and instructors during the course through a collection of observation and field notes, student journals, pre- and post-construct tests, and final presentation. Follow-up interviews were conducted 10 months after course completion. Six students participated in this course and study who were from a variety of disciplines and classifications. Five students were female; one was male. Four students were undergraduates; two were graduate students. Student ethnicities included three Caucasians and African American, along with two international students from Mexico and Iran. Key outcomes of this study were that when short-term study abroad faculty members applied creative interventions, students were transformed with regard to their beliefs, perspectives, and behaviors and that when they guided students through a process of reflection and analysis, students exhibited exponential personal development. In addition, the ability to challenge or support students in reaching higher levels of personal development is a privilege that faculty must earn over time and through an authentic demonstration of care for students’ wellbeing. Short-term study abroad faculty members can use the results of this study to maximize the developmental impact of such programs on student participants. digital.library.unt.edu/ark:/67531/metadc822773/
Exploring Sustainability VALS: Sustainability Value, Lifestyle Practices and Stewardship
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Living sustainability is a set of behaviors for the long-term functioning of society. Sustainability VALS provides the clothing and textiles industry distinctive insight into comprehending the phenomenon through the application of the appropriate theoretical platform. The objectives are to identify the dimensionality of sustainability value, sustainability practices and sustainability stewardship in consumers’ perceptive, and to examine the impacts of sustainability value and stewardship on sustainability practices. Analyzing data (n = 239) from a southwestern university reveals the critical dimensions of sustainability lifestyle practices, sustainability value and sustainability stewardship. 62 out of 64 hypotheses were confirmed the significant impacts of sustainability values and stewardship on sustainability lifestyle practices. The findings revealed that the altruistic, openness to change, anthropocentrism, and ecocentrism values are influential sustainability values affecting on sustainability lifestyle practices. Given the theoretical perspective of sustainability VALS, sustainability stewardships can facilitate the holistic idea to incur consumer’s sustainability lifestyle practices. digital.library.unt.edu/ark:/67531/metadc103352/
Exploring Teachers’ Constructivist Beliefs Using Talis 2013: Approaches to Training and Development
The changing landscape of demographics, technology, and diversity in the learning environment is challenging schools around the world to rethink their approaches to the implementation of high-quality teaching practices. Classroom practices are becoming more complex because educators have to ensure that their students are well-equipped with 21st century skills (e.g., Darling-Hammond, 2010; Dede, 2010; Griffin, McGaw, & Care, 2012). Educators, curriculum developers, and school administrators need to be more than experts in pedagogy. They are now required to keep up with current ideas, innovative instructional practices, and the results of a variety of educational reform efforts. Believing that teachers’ beliefs are the most important psychological construct with regard to instructional practices (Pajares, 1992) and that teachers’ beliefs are related to their choice of classroom practices and, ultimately, the students’ performance (Bybee, Taylor, Gardner, Van Scotter, Powell, Westbrook, & Landes, 2006; Staub & Stern, 2002), the author of this study utilizes the international data set of the Teaching and Learning International Study (TALIS) 2013 to examine the associations between teachers’ constructivist beliefs, their self-efficacy beliefs, professional activities, and the school principals’ instructional leadership as related to lower secondary school teachers and principals in South Korea, Finland, and Mexico. These three countries represent the high and low performers in the global index of cognitive skills and educational attainment (Pearson, 2014). An account of their educational practices will provide some insights for stakeholders in school systems across nations. Nevertheless, it is important to understand that each country has unique teaching and learning conditions, and that conclusions reached in relation to such conditions do not apply across nations. A series of hierarchical linear modeling (HLM) studies were performed for the present work to provide evidence-based information with practical implications to school administrators and educational policymakers regarding the development and implementation of leadership programs and teacher professional development. Additionally, an understanding of how the constructivist beliefs associate with the level of self-efficacy and professional activities will assist curriculum developers in higher educational institutions in the development of quality teacher preparation programs for the future teaching workforce. digital.library.unt.edu/ark:/67531/metadc804991/
Exploring Team Performance as an Independent Variable: Can Performance Predict Resource Allocation?
Encouraging positive work team growth depends on, in part, the form and availability of organizational resources and support. Support systems have been found to be important for work team health and survival. However, managers are challenged to make resource decisions while working within company budgetary restraints. Previous research has indicated a positive relationship exists between teams provided with appropriate resources and support, and increased team performance. This study extended previous research by exploring if team performance can predict resources and support. Specifically, the means by which managers allocate resources based on team performance was examined. Archival data included 36 work teams and their managers drawn from four geographically dispersed manufacturing companies. Information gathered from a modified version of an original team support system instrument was used to assess the importance and presence of four resource systems. Additionally, a gap score was calculated from these scores to assess the alignment between resource need and resource existence. Data was used to assess the potential relationships between managers' perceptions of team performance and the manner by which resources are allocated. All hypotheses produced non-significant findings. Results of the hypotheses, data patterns, and limitations of the study are discussed, and opportunities for future research are presented. digital.library.unt.edu/ark:/67531/metadc5147/
Exploring Thai EFL University Students' Awareness of Their Knowledge, Use, and Control of Strategies in Reading and Writing
The purpose of this research was to conduct case studies to explore and describe Thai university students' awareness and application of cognitive and metacognitive strategies when reading and writing in English-as-a-foreign-language (EFL). Four participants, including two high and two low English language proficiency learners, were selected from 14 students enrolled in a five-week course called English for Social Sciences offered at Kasetsart University in Bangkok, Thailand in 2005. The major sources of data for the analyses included the transcripts of the participants' pair discussions, think-aloud protocols, interviews, and daily journal entries. In addition, field work observations, reading and writing strategy checklists, participants' written work, and the comparison of the pretest and posttest results were also instrumental to the analyses. The interpretive approach of content analysis was employed for these four case studies. Findings were initially derived from the single-case analyses, and then from cross-case analyses. Major findings revealed that strategic knowledge enhanced these English-as-a-foreign- language (EFL) learners' proficiency in English reading and writing. However, applying elaborative strategies for higher-level reading was challenging for most of the participants. Two crucial factors that impeded their development were the learners' uncertain procedural and conditional knowledge of strategy uses and their limited English language proficiency due to limited exposure to the second language (L2). The teacher's explanations and modeling of strategies, the participants' opportunities to discuss strategy use with peers, and extensive practice positively enhanced their development. Additionally, the learners' schema and knowledge of text structures played significant roles in their development of the two skills. These English-as-a-foreign-language (EFL) learners also developed metacognitive awareness and strategy applications, but not to the level that always enhanced effective regulation and control of their reading and writing behaviors. Combining reading and writing in English-as-a-foreign-language (EFL) instruction promoted the learners' awareness of the relationships of certain strategies for the two skills, and developed their literacy skills holistically. digital.library.unt.edu/ark:/67531/metadc5429/
Exploring the College Pathways of Asian American Community College Students and the Model Minority Myth
Contrary to the model minority myth that portrays Asian Americans as academic all-stars over-represented in elite four-year institutions, half of all Asian American college students do in fact attend community colleges, and many experience myriad challenges. This exploratory study investigated the community college pathways of Asian American community college students, the role of family and culture in shaping expectations for higher education, and participants’ perceptions of the model minority myth and the degree to which this myth influenced their college experiences. Institutional practices and policies, or lack thereof, that support the success of this highly diverse population were also studied. Purposeful sampling was used to gather a sample of 28 students, who self-identified as Asian American and attended one of the three largest community college districts located in North Texas. The sample included 16 males and 12 females, whose ages ranged from 18 to 49 years old, with a mean age of 24. Data collection involved a demographic questionnaire and semi-structured individual interviews. The participants represented 13 different ethnicities, and nine were members of more than one ethnic or racial group. Ten participants were foreign-born citizens, and all of the participants had at least one foreign-born parent. Qualitative data provided description rich information that shed light on the expectations, experiences, and views of Asian American community college students, a virtually unstudied population. Consistent with current literature on Asian American college students, the findings suggest many Asian American community college students struggle with tremendous cultural and familial pressures for succeeding academically, and many described their experiences with racial microaggressions related to model minority stereotypes that they perceived their peers and instructors to have held. Recommendations for policy and practice designed to improve educational outcomes for Asian American community college students are addressed. digital.library.unt.edu/ark:/67531/metadc799483/
Exploring the Dual-natured Impact of Digital Technology on Student-classroom Engagement in a Texas Public High School
The past decade has become rife with an eagerness to integrate new digital technology into teaching. While there have been decades of research done on the importance of curriculum and pedagogy on student engagement, findings of actual technology integration are scarce. Moreover, what does it take to engage students in classroom activities and lessons when technology is introduced? The purpose of this study was to explore how digital technology, when integrated into classroom teaching and activities, impacted the students-classroom engagement based on the interim-cognitive, meta-cognitive, motivational, and behavioral markers. This was explored in a Texas public high school across the four core classes (English, Math, Science, and Social Studies. Data was collected in the form of observational field notes, transcripts of recorded lessons, and Likert-scaled surveys. Thematic analysis was used in analyzing qualitative data, Pearson’s correlation of those components found by factor analysis verified three of the five themes identified from the thematic analysis with statistical significance. The findings suggest that mere use of technology does not have a profound impact on student engagement. Instead, technology tends to amplify the existing classroom culture and social norms agreed upon between the teacher and their students. Texas teachers and students are also redefining the meaning of curriculum to include technology as a result of the attempted integration. This research finds that students’ hands-on activities under teachers’ guidance with the use of technology excel when teachers are molding digital work. digital.library.unt.edu/ark:/67531/metadc822755/
Exploring the Effectiveness of Curriculum Provided Through Transmedia Books for Increasing Students’ Knowledge and Interest in Science
Transmedia books are new and emerging technologies which are beginning to be used in current classrooms. Transmedia books are a traditional printed book that uses multiple media though the use of Quick Response (QR) codes and augmented reality (AR) triggers to access web-based technology. Using the transmedia book Skills That Engage Me students in kindergarten through second grade engage in curriculum designed to introduce science skills and careers. Using the modified Draw-a-Scientist Test (mDAST), observations and interviews, researchers analyzed pre and post data to describe changes students have about science and scientists. Future study may include the development and validation of a new instrument, Draw a Science Student, and examining the mDAST checklist with the intention of updating the parameters of what is considered positive and negative in relationship with work a scientist conducts. digital.library.unt.edu/ark:/67531/metadc822809/
Exploring the Evolutionary History of North American Prairie Grouse (Genus: Tympanuchus) Using Multi-locus Coalescent Analyses
Conservation biologists are increasingly using phylogenetics as a tool to understand evolutionary relationships and taxonomic classification. The taxonomy of North American prairie grouse (sharp-tailed grouse, T. phasianellus; lesser prairie-chicken, T. pallidicinctus; greater prairie-chicken, T. cupido; including multiple subspecies) has been designated based on physical characteristics, geography, and behavior. However, previous studies have been inconclusive in determining the evolutionary history of prairie grouse based on genetic data. Therefore, additional research investigating the evolutionary history of prairie grouse is warranted. In this study, ten loci (including mitochondrial, autosomal, and Z-linked markers) were sequenced across multiple populations of prairie grouse, and both traditional and coalescent-based phylogenetic analyses were used to address the evolutionary history of this genus. Results from this study indicate that North American prairie grouse diverged in the last 200,000 years, with species-level taxa forming well-supported monophyletic clades in species tree analyses. With these results, managers of the critically endangered Attwater's prairie-chicken (T. c. attwateri) can better evaluate whether outcrossing Attwater's with greater prairie-chickens would be a viable management tool for Attwater's conservation. digital.library.unt.edu/ark:/67531/metadc271815/
Exploring the Evolving Landscape of Open Access
Presentation for a workshop at the 2013 Open Access Symposium. This presentation discusses the impact of open access for students, the impact of open access on universities, and the impact of open access on publishing practices. digital.library.unt.edu/ark:/67531/metadc171452/
Exploring the Gender Role Ideology of Black and White Men Between Ages 18 to 30
This research is a qualitative study that explores the gender role ideology of Black and White men between the ages of 18-30. The study found that both groups are moving toward egalitarianism on different pathways. The pathways illustrate the effect of racial identity on gender role ideology. White respondents had a progressive egalitarianism which stemmed from ideas reflected individualism, secularization, and the identification with the grand narrative of the United States. Their respondents also reflected postmodern ideas. Overall their ideas reflect larger White racial identity and shows an overlap between the progressive understanding of modernity and with postmodernist ideas of non-deterministic definitions. Black respondents had a collaborative egalitarianism which stemmed from historical racial and economic deprivation. Subsequently, Blacks gender role ideology illustrates collaboration and communal interdependence between of Black men and women, and the Black church. Blacks tended to view things from a social perspective that was often reactionary. Overall, their ideas reflected the larger Black racial identity which emphasizes collaboration between men and women and a reliance on community based institutions like the Black church. digital.library.unt.edu/ark:/67531/metadc500185/
Exploring the Impact on Self-regulated Learning: a Comparative Analysis of Learner Experiences Using Problem-based Learning, Game Play, and Computer-based Instruction
The ability to transfer what you know to new and different contexts is a sign of successful learning. While students often graduate from college with the required number of courses many lack the skills necessary to apply appropriate strategies to solve problems in different contexts, to reason, and think critically. More than a decade ago the Boyer Report (1995) pointed to this fact as a sign that Universities were falling short in adequately supporting their undergraduate populations. As a result, it is not uncommon to see educational institutions introducing new courses and programs geared towards helping students learn better. This study explores learner experiences and the impact on self-regulated learning within a distributed learning setting when motivated by problem-based learning, game play, and computer-based instruction. In this study the instructional design of the course introduced undergraduate students to authentic learning experiences in which students engaged in collaborative problem solving and learning activities framed within the narrative of an alternate reality game. Fifteen self-regulated learning constructs were examined. The comparison group engaged with problem solving tasks and computer-based instruction. Additionally, the study used the theory Learning and Teaching as Communicative Action and its four communicative actions as a lens to understand the full range of student interactions and how they constructed knowledge. The research design employed computer-mediated discourse analysis to examine qualitative data. Data was triangulated through constant-comparative coding of student communication in the form of web logs, emails, student assignments, and semi-structured interviews. Review and consensus building was embedded in the process of identifying emerging codes and categories, and used to support emergent inferences before the final themes were identified and mutually agreed upon. Finally, to evaluate the outcome of the instructional design, pre and posttest measures were used among groups using a two-sample t-test. Statistical significance was used to determine changes in learning outcomes while select qualitative codes were examined and reviewed to gauge student satisfaction with the instructional approach. Results indicated substantial qualitative and quantitative differences among the three versions of the course related to self-regulated learning practices and communicative action in particular in terms of student interaction, and knowledge construction. Additional, findings revealed differences in epistemic beliefs about learning, which in turn influenced how students chose to learn. These outcomes are presented and discussed along with the implications for instructional design. digital.library.unt.edu/ark:/67531/metadc500031/
Exploring the Impacts of Fashion Blog Type and Message Type on Female Consumer Response Towards the Brand
The current study examines the influences of blog type and blog message type on consumers’ perceptions of brand credibility and brand similarity. Additionally, the study seeks to understand the interaction effects of blog type and message type on brand credibility and brand similarity and on consumer engagement with a blog. The findings reveal that message type, specifically product message, is an important consideration when marketers want to illustrate similarities between the brand and consumers. Additionally, it was found that product messages should be considered when encouraging consumer engagement with a blog. However, blog type did not have an effect on consumer perceptions of brand credibility and similarity or consumer engagement. digital.library.unt.edu/ark:/67531/metadc407834/
Exploring the Integration of Near-Death Experience Aftereffects: Summary of Findings
Abstract: Preliminary evidence suggests that both near-death experiencers (NDErs) and nonexperiencers who learn about near-death experiences (NDEs) show beneficial aftereffects. In this article I summarize the findings of an exploratory study to examine a small group process utilizing spiritual guidance and expressive arts for integrating NDE aftereffects. Eleven adult participants -- four NDErs and seven non-NDErs -- completed a pretest, initial posttest, and longitudinal posttest consisting of a revised version of the Omega Life Change Questionnaire (Rominger-LCQ) and the Human Spirituality Scale, as well as semistructured individual and group interviews. I also collected the expressive art participants created during sessions, photographed it, and used it to identify pictorial themes. Quantitative results included some significant differences and some nonsignificant trends indicating greater spirituality and life changes among NDErs compared to non-NDErs and, for all participants, from pre- to posttest. Qualitative interview material revealed participants had learned material on a number of topics of including a broader understanding of, and ability to communicate about, the NDE. Qualitative pictorial data revealed themes suggesting that both NDErs and non-NDErs had integrated positive aftereffects. The process described herein may benefit spiritual guides and directors, expressive art therapists, and therapists working with individuals who have had an NDE or other spiritually transformative experience. I also discuss methodological benefits of using artistic inquiry. digital.library.unt.edu/ark:/67531/metadc461753/
Exploring the Integration of Thai Traditional Music in Chakra by Narong Prangchareon, with a Conductor’s Guide
This dissertation explores the integration of Thai traditional music in Chakra, for wind band, by Narong Prangchareon. Nipat Kanchanahud explores how Narong, inspired by Eastern philosophy, integrates elements of Thai traditional music and the types, styles, scales, and dialects of Thai culture with the formal elements of Western music and the instrumentation of the Western wind band. Chakra uniquely spans Eastern and Western cultures, creating a new musical language for both worlds to appreciate and enjoy. Further, the composition richly demonstrates the viability of the wind band as an international medium. The orchestration of Chakra reveals Narong’s musical lineage from Edgard Varèse through Chen Yi. A conductor’s guide, included with this dissertation, is designed to aid and encourage performances of Chakra throughout the world. digital.library.unt.edu/ark:/67531/metadc804989/
Exploring the Private Music Studio: Problems Faced by Teachers in Attempting to Quantify the Success of Teaching Theory in Private Lessons through One Method as Opposed to Another
I present strategies and methods for teaching fundamentals of music theory in the context of the private music studio through a variety of techniques and research. Beginning with a background in educational psychology, examples of behaviorist and cognitive teaching models are presented, and how each applies to teaching music is explained. Two detailed examples of actual lessons are presented, coupled with musical examples, to describe both the process and the concepts that can be presented. A qualitative experiment based upon the learning styles of three music students and the effect of different teaching styles when teaching the same concept is presented and discussed in detail. digital.library.unt.edu/ark:/67531/metadc5356/
Exploring the relationship between continuing professional education and job satisfaction for information technology professionals in higher education.
The study had four main hypotheses that examined the relationships between job satisfaction and the reasons for attending continuing professional education (CPE). The purpose of this study was to examine the relationships between training and job satisfaction with the objective of adding to the body of knowledge related to both job satisfaction and training and development. Participation Reasons Scale was used to measure the reasons for attending CPE activities, and the Job in General Scale and Job Descriptive Index was used to measure job satisfaction. The surveys were administered over the Internet to information technology professionals working in higher education. The participants were contacted by email with a message explaining the purpose of the research and a Web link that took the participants directly to the survey. After collecting the data, it was exported into SPSS and analyzed using Spearman Rho and Mann Whitney U statistics and a simple structure exploratory factor to determine any underlying structures between the job satisfaction and CPE. digital.library.unt.edu/ark:/67531/metadc5296/
Exploring the Relationships Between Faculty Beliefs and Technology Preferences
All too often faculty are asked to implement technology into their teaching without the knowledge necessary to use the technology effectively. Due to the evolution of technology in everyday settings, students have come to expect to be engaged through technological means. This often creates undue stress on faculty members. The purpose of this study is to investigate technology integration by exploring the relationships between a faculty member’s technology preferences and educational beliefs. Through a mixed method, this study attempts to address the question of why faculty use the types of technology they do. More importantly, this study investigates if a faculty member’s educational beliefs have any influence on the technology they choose to use. Thirty-two medical, clinical, and healthcare faculty members participated in the study. They responded to a Teaching Perspectives Inventory (TPI) survey and a Technology Preferences survey with open-ended questions. Data analysis revealed multiple statistically significant findings between different beliefs and different types of technology. The results indicated that personal epistemic beliefs influence the types of technology faculty use. The technology choices faculty make are largely related to tools they are comfortable with and ones they believe effectively fit their teaching materials. The study also found statistically significant differences between age, gender, and reported technology use. It is suggested faculty development programs should consider faculty members’ educational beliefs and personal preferences when supporting faculty with their uses of technologies. digital.library.unt.edu/ark:/67531/metadc799481/
Exploring the Relationships Between Mindfulness, Self-compassion, and Ethnic Identity Development
Ethnic identity development is a process that occurs for all individuals, and weakness in ethnic identity is associated with numerous psychosocial difficulties. Security in ethnic identity can be difficult for those exposed to varying attitudes and behaviors in a multicultural society. As such, the current study examined the influence of mindfulness and self-compassion on ethnic identity development. a sample of 479 undergraduate students completed online self-report questionnaires measuring demographic information, mindfulness, self-compassion, ethnic identity status, and self-esteem. Results suggested that mindfulness and self-compassion are significant negative predictors of ethnic identity, and that self-compassion was a better predictor of ethnic identity status than was mindfulness. Self-compassion did not moderate the relationship between mindfulness and ethnic identity status, as was hypothesized. the sample included primarily Caucasian (n = 278) individuals born in the United States, which likely limited generalizability of findings. Implications of the current findings and suggestions for future research are discussed. digital.library.unt.edu/ark:/67531/metadc115160/
Exploring the role of secondary attachment relationships in the development of attachment security.
The process by which earned-secures achieve attachment security in adulthood, despite having insecure parent-child relationships in childhood, was the focus of the current study. As internal working models are thought to be formed within relationships, specifically primary attachment bonds (Bowlby, 1969), it was postulated that secondary attachment relationships, specifically those that were positive, had the capacity to revise insecure models of self and other. In the current study, the secondary attachment histories of undergraduates who were earned-secure and continuously-insecure, or insecurely attached since childhood, were compared. A new measure of secondary attachment quality was developed (Questionnaire About Secondary Attachment Figures (Q-SAF)), which was used to measure undergraduates' perceptions of their past and current secondary attachment figures. Findings indicated that in comparison to continuous-insecures, earned-secures perceived their negative secondary attachment figures in adolescence as less mean. Earned-secures also reported being less dependent upon these figures' approval of them for their self-worth and more secure within these relationships. In adulthood, earned-secures reported more trust and intimacy with their positive secondary attachment figures. Compared to continuous-insecures, earned-secures described their peers as being more empathic and altruistic during childhood and more warm during adolescence; earned-secures also reported less dependency and greater closeness with their peers throughout development. Grandparents were listed the most frequently by earned-secures as positive secondary attachment figures during childhood and this number was more than double that for continuous-insecures. Further, earned-secures described their grandparents in childhood as being more altruistic and they reported being less concerned with receiving their acceptance. Siblings from childhood were described by earned-secures as being more empathic than those of continuous-insecures, yet earned-secures also reported greater dismissing attachment to their siblings and cousins in childhood. Significant others from adolescence were rated by earned-secures as being less mean than those of continuous-insecures and earned-secures reported being more securely attached to these relationships in both adolescence and adulthood. Implications of the current study and directions for future research are presented. digital.library.unt.edu/ark:/67531/metadc4891/
Exploring the Texas Revolution Online through The Portal to Texas History
This presentation illustrates examples of items held in The Portal to Texas History collection and how these works contribute to learning about the history of the Texas Revolution. digital.library.unt.edu/ark:/67531/metadc29792/
Exploring Trusted Platform Module Capabilities: A Theoretical and Experimental Study
Trusted platform modules (TPMs) are hardware modules that are bound to a computer's motherboard, that are being included in many desktops and laptops. Augmenting computers with these hardware modules adds powerful functionality in distributed settings, allowing us to reason about the security of these systems in new ways. In this dissertation, I study the functionality of TPMs from a theoretical as well as an experimental perspective. On the theoretical front, I leverage various features of TPMs to construct applications like random oracles that are impossible to implement in a standard model of computation. Apart from random oracles, I construct a new cryptographic primitive which is basically a non-interactive form of the standard cryptographic primitive of oblivious transfer. I apply this new primitive to secure mobile agent computations, where interaction between various entities is typically required to ensure security. I prove these constructions are secure using standard cryptographic techniques and assumptions. To test the practicability of these constructions and their applications, I performed an experimental study, both on an actual TPM and a software TPM simulator which has been enhanced to make it reflect timings from a real TPM. This allowed me to benchmark the performance of the applications and test the feasibility of the proposed extensions to standard TPMs. My tests also show that these constructions are practical. digital.library.unt.edu/ark:/67531/metadc6101/
The Exponential Functions
The purpose of this paper is to clarify the problems of exponents by introducing notation not customarily used and by demonstrating certain theorems in regard to the properties of the exponential functions. digital.library.unt.edu/ark:/67531/metadc75644/
Exposing Deep-rooted Anger: A Metaphor Pattern Analysis of Mixed Anger Metaphors
This project seeks to serve two purposes: first, to investigate various semantic and grammatical aspects of mixed conceptual metaphors in reference to anger; and secondly, to explore the potential of a corpus-based, TARGET DOMAIN-oriented method termed metaphor pattern analysis to the study of mixed metaphor. This research shows that mixed metaphors do not pattern in a manner consistent with statements made within conceptual metaphor theory. These metaphors prove highly dynamic in their combinability and resist resonance between SOURCE DOMAINS used. Also shown is the viability of metaphor pattern analysis as a methodology to approach mixed metaphor research. digital.library.unt.edu/ark:/67531/metadc84170/
Exposure to and Attitudes Toward the Mass Media of Students at Sam Houston High School
This study was concerned with determining the amount of exposure high school students have to mass media and their attitudes toward news. The purposes of this study were to find how much time high school students devote to newspapers, radio, television, and magazines for entertainment and information, to discover which publications or channels students are most interested in and why; to find out specifically what young people read, listen to, and watch; to discover how most of them get their news information; and to determine positive and negative feelings toward media news. digital.library.unt.edu/ark:/67531/metadc131639/
Expression analysis of the fatty acid desaturase 2-4 and 2-3 genes from Gossypium hirsutum in transformed yeast cells and transgenic Arabidopsis plants.
Fatty acid desaturase 2 (FAD2) enzymes are phosphatidylcholine desaturases occurring as integral membrane proteins in the endoplasmic reticulum membrane and convert monounsaturated oleic acid into polyunsaturated linoleic acid. The major objective of this research was to study the expression and function of two cotton FAD2 genes (the FAD2-3 and FAD2-4 genes) and their possible role in plant sensitivity to environmental stress, since plants may increase the polyunsaturated phospholipids in membranes under environmental stress events, such as low temperature and osmotic stress. Two FAD2 cDNA clones corresponding to the two FAD2 genes have been isolated from a cotton cDNA library, indicating both genes are truly expressed in cotton. Model yeast cells transformed with two cotton FAD2 genes were used to study the chilling sensitivity, ethanol tolerance, and growth rate of yeast cells. The expression patterns of the two FAD2 genes were analyzed by reverse transcription polymerase chain reactions (RT-PCR) and Western blot analyses in cotton plants under different treatment conditions. The coding regions of both FAD2 genes were inserted downstream from the CaMV 35S promoter in the pMDC gateway binary vector system. Five different FAD2/pMDC constructs were transformed into the Arabidopsis fad2 knockout mutant background, and multiple potential transgenic Arabidopsis plant lines harboring the cotton FAD2 genes were generated. The cotton FAD2 genes were amplified by the polymerase chain reaction (PCR) from the genomic DNAs isolated from the transgenic Arabidopsis T1 plant lines. Complementation of the putative transgenic Arabidopsis plants with the two cotton FAD2 genes was demonstrated by gas chromatography analyses of the fatty acid profiles of leaf tissues. The cellular localization of cotton FAD2-4 polypeptides with N-terminal green fluorescence protein (GFP) was visualized by confocal fluorescence microscopy. The phenotype of transgenic Arabidopsis plants transformed with the cotton FAD2-4 gene was compared to Arabidopsis knockout fad2 mutant plants and wild type Arabidopsis plants regarding their sensitivity to low temperature, and the size and height of the plants. digital.library.unt.edu/ark:/67531/metadc9002/
Expression of G-protein Coupled Receptors in Young and Mature Thrombocytes and Knockdown of Gpr18 in Zebrafish
Access: Use of this item is restricted to the UNT Community.
In this study, a novel method based on biotinylated antibodies and streptavidin coated magnetic beads was used to separate the thrombocyte subpopulations from zebrafish whole blood. DiI-C18, a lipophilic dye, labels only young thrombocytes when used at low concentrations. Commercially available biotinylated anti-Cy3 antibody was used to label the chromophore of DiI-C18 on the young thrombocytes and streptavidin coated magnetic beads were added subsequently, to separate young thrombocytes. The remaining blood cells were probed with custom-made biotinylated anti-GPIIb antibody and streptavidin magnetic beads to separate them from other cells. Further, thrombocytes are equivalents of mammalian platelets. Platelets play a crucial role in thrombus formation. The G-protein coupled receptors (GPCRs) present on the platelet surface are involved during platelet activation and aggregation processes. So, thrombocytes were studied for the presence of GPCRs. The GPCR mRNA transcripts expressed in the young and mature thrombocytes were subjected to densitometry analysis and pixel intensities of the bands were compared using one way ANOVA. This analysis did not show significant differences between the young and mature GPCR mRNA transcripts but identified a novel GPCR, GPR18 that was not reported in platelets earlier. To study the function of this GPCR, it was knocked down using GPR18 specific antisense morpholino and vivo morpholino. The immunofluorescence experiment indicated the presence of GPR18 on thrombocytes. The results of the assays, such as, time to occlusion (TTO) and time to aggregation (TTA) in response to N-arachidonyl glycine (NAG) as an agonist, showed prolongation of time in GPR18 larval and adult morphants respectively, suggesting that GPR18 plays a role in thrombus formation in zebrafish. In conclusion, our results indicate that GPR18 may be present in zebrafish thrombocytes, it may be involved in thrombus formation and that NAG may be an agonist at GPR18 on thrombocytes. digital.library.unt.edu/ark:/67531/metadc271881/
Expressive Arts Therapy with Bereaved Families
Most current grief programs support the children and/or parents of bereaved families rather than the family as a whole. This exploratory study was a quantitative and qualitative investigation of the use of expressive arts therapy with bereaved families during a weekend camp experience and a series of followup sessions. The purpose of the study was to determine the effectiveness of using expressive arts activities in improving the functioning of the bereaved family as a whole as well as individual family members. Participants included eight families who lost a child to a chronic illness between 2 to 36 months months prior to the onset of the study. Children ranged in age from 3 to15, and parents ranged in age from 26 to 66, for a total of 27 participants. The Child Life Department at Children's Medical Center of Dallas, a division of The University of Texas Southwestern Medical Center in Dallas, Texas recruited the families. Participants received flyers and invitational letters and registered through the mail. Families attended a weekend camp where they experienced a wide variety of expressive arts activities in a combination of group formats: multi-family groups, parents' group, developmental age groups for children, total childrens' group, individual family group, mothers' group, and fathers' group. The research design was a pretest/posttest quasi-experimental control group design, but a control group could not be established. Therefore, one-tailed t-tests were used to compare participant functioning between the beginning and end of the study. Instruments used in this study included the Family Environment Scale, the Behavior Assessment System for Children the Beck Anxiety Inventory and the Beck Depression Inventory. In addition, the researcher used qualitative analysis to assess contents of family members' and counseling staff's journals, expressive arts products, and family members' evaluations. Results of this exploratory study indicated some improvements in children's, parents' and total family functioning. Expressive arts therapy shows promise in effecting constructive change in bereaved families and is deserving of further research. digital.library.unt.edu/ark:/67531/metadc2861/
Expropriation of American Oil Interests and its Effect on United States-Mexican Relations since 1938
This thesis discusses the seizure of all foreign owned oil property by the Mexican government in 1938 and the historical events leading up to the seizure. digital.library.unt.edu/ark:/67531/metadc53636/
Expulsion of Carriers from the Double-Barrier Quantum Well and Investigation of Its Spectral and Transport Consequences
In this work I investigate the expulsion of carriers from nanostructures using the double-barrier quantum well (DBQW) as an example and discuss manifestations of this effect in the spectrum of the DBQW in absence of bias, and in the tunneling current in presence of bias. Assuming equality of the Fermi energy in all regions of the considered system, I compute the relative density of carriers localized in the DBQW and conclude that a fraction of carriers is expelled from this nanostructure. digital.library.unt.edu/ark:/67531/metadc277697/
Extemporizing Reawakened: Saxophonist Branford Marsalis's Approach to the Cadenza for Concertino da Camera for Alto Saxophone and Eleven Instruments by Jacques Ibert
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Whether provided by a composer, written out by a performer or completely improvised, the cadenza became a vehicle for performers' creativity, lyricism and technical prowess in the eighteenth and nineteenth centuries. The debate about whether to notate or improvise cadenzas, a question as old as the cadenza itself, continues today. Saxophonists have not been involved in this debate, since the instrument is a product of the mid-nineteenth century and was in its infancy just as the practice of improvising cadenzas was fading. This study documents an unprecedented, recently-recorded, improvised cadenza in one of the most significant twentieth-century saxophone works: Jacques Ibert's Concertino da Camera for Alto Saxophone and Eleven Instruments (1935). Saxophonist Branford Marsalis's neo-cadenza for Ibert's composition presents an aggregate of the twenty-first-century performer improvising a cadenza to a twentieth-century work, in a tradition that was common centuries ago. The document begins with an inquiry into improvised cadenzas, and proceeds to an examination of the performance history of the cadenza for the Concertino da Camera. Twenty professionally-recorded versions of the cadenza are presented in order to understand the performance history of the cadenza, and to place the Marsalis cadenza into context. This research culminates in a transcription and analysis of the cadenza as improvised and recorded by Marsalis. Remarks from a personal interview with Marsalis are also included. digital.library.unt.edu/ark:/67531/metadc5610/