UNT Theses and Dissertations - 404 Matching Results

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Practical Astronomy

Description: This dissertation is a collection of poems preceded by a critical preface. The preface considers Anthony’s Hecht’s long poem, “The Venetian Vespers,” and the ways in which the temporally unsettled situation of the poem’s speaker parallels a problem facing narrative-meditative poets. The preface is divided into two main sections that explore divisions of this larger conflict. The first discusses the origins and effects of the speaker’s uprootedness in time, and the ways in which he tries to both combat and embrace this dislocation by temporarily losing himself in the immediacy of observing visual art. In this section I connect the dilemma of the speaker, who wishes to escape his memory by focusing outwards, to the dilemma of a representational poet who, despite his position towards the past, must necessarily confront or recollect memories and emotions in order to create authentic descriptions or characters. The second section focuses on the production and appreciation of artistic works (both visual and literary) and how the meaning, production and appreciation of beauty are inseparable from its existence within the physical limits of time. Here I discuss the significance of Hecht’s character who is surrounded with beauty yet describes himself as a person who only observes and does not create anything. Through this character, I argue that Hecht reveals a fundamental conflict that exists between artistic creation and chronological time, and that his poem embodies a particular and paradoxical view of beauty that resonates deeply with the motivations and struggles of writing poems.
Date: August 2012
Creator: Woodard, Chelsea S.
Partner: UNT Libraries

Testing a Comprehensive Model of Muscle Dysmorphia Symptomatology in a Nonclinical Sample of Men

Description: As increasing emphases are placed on the importance of a muscular male physique in Westernized culture, more men are experiencing eating, exercise, and body image (EEBI) disturbances. Clinician-researchers have identified a syndrome, termed muscle dysmorphia (MD), in which individuals, usually men, are pathologically preoccupied with their perceived lack of muscularity. The current study tested a modified version of an extant theoretical model of MD symptomatology as well as an alternative model of MD symptomatology. Over 700 adult men completed a demographic questionnaire, a symptom inventory, a self-esteem questionnaire, a measure of perfectionism, a measure of the media’s influence on EEBI disturbances, and measures of body dissatisfaction and MD symptoms. Structural equation modeling (SEM) was used to examine the goodness of fit of the proposed models. Overall, the first model demonstrated poor fit with the data. Conversely, the alternative model fit the data adequately. The alternative model was cross validated with a second sample, and also fit this data adequately.
Date: August 2012
Creator: Woodruff, Elissa J.
Partner: UNT Libraries

Implementing a Physical Activity Centered Education Program for Individuals with Brain Injury

Description: Research has shown that health promotion programs (HPP) that incorporate education about physical activity (PA) are one mode of rehabilitation that can improve the health of individuals with disabilities. However, education-based PA curriculum is not included in the rehabilitation program for individuals with a brain injury, indicating a gap in services provided. Consequently, the purpose of this study was to create and deliver a physical activity centered education (PACE) program that supplemented the existing rehabilitation program for brain injury. PACE consists of an 8-week (16 session) program aimed to (1) increase self-efficacy for being physically active of PACE program participants, (2) increase PA stage of change in PACE program participants or the maintenance of adequate level of PA, and (3) improve the rehabilitation outcomes (i.e., abilities, participation, adjustment) of PACE program participants. Based on previous research, it is hypothesized that participation in PACE will result in (1A) increased self-efficacy for PA, (1B) greater self-efficacy for PA than the standard of care group, (2A) increased readiness to be physically active, (2B) greater readiness to change their PA behavior than the standard of care group, (3A) improved rehabilitation outcomes, and (3B) greater rehabilitation outcomes than the standard of care group. the PACE program resulted in: (1) an average increase of 19.36% in participants’ PA self-efficacy (effect size [ES] = 0.37), (2) 15 of the 22 PACE participants (68.18%) reported readiness to engage in regular PA , and (3) an increase in rehabilitation outcomes (i.e., abilities, adjustment, and participation)In conclusion, the PACE program can improve PA self-efficacy, readiness for regular PA behavior, and improved short-term rehabilitation outcomes.
Date: May 2012
Creator: Woolsey, Anne-Lorraine T.
Partner: UNT Libraries

Emotional and Cognitive Coping in Relationship Dissolution

Description: Romantic relationships are important for social development and can impact an individual’s functioning both positively and negatively, especially when the relationship breaks up. Emotional and cognitive coping strategies including emotion approach coping, avoidance, and rumination and variable response to expressive writing intervention were examined in relation to post-dissolution distress. Undergraduate participants randomized into two groups completed measures of cognitive and emotional coping variables and global distress, with the experimental group completing a three-session expressive writing protocol. Writing samples were rated for processing mode, or the degree of vague general statements. Avoidance and rumination demonstrated significant cross-sectional associations with Time 1 distress controlling for demographics and characteristics of the former relationship. Gender moderated the relationship between rumination and distress. Using a matched sub-sample, the groups did not differ on emotional coping variables or distress. Results demonstrate the importance of examining emotional coping strategies in conjunction with relationship dissolution.
Date: August 2012
Creator: Wrape, Elizabeth R.
Partner: UNT Libraries

Value Development in Emerging Adulthood: the Influence of Family

Description: The purpose of this study was to better understand value development in an emerging adult, college student population, and to further define, identify and clarify family characteristics that influence values. Theories have sought to examine the developmental influences in emerging adulthood, but little research exists examining the role of the family, particularly in regards to value development. The current study reviewed the literature on emerging adulthood, values, and self-determination theory with attention to family influence. Questions addressed in this study included: 1) are perceived parent values predictors of emerging adult values, 2) will the quality of communication between parents and emerging adults and the presence of an emotionally supportive relationship with both mother and father moderate the relationship between the perception of parent values and emerging adult values, and 3) does the family environment influence the types of values emerging adults perceive to be important to their parents? For this purpose, 200 college students completed 5 different self-report questionnaires measuring the constructs of values, perceived parent values, family environment variables, family communication variables, and quality of relationship with both father and mother. Parents of college students completed a self-report questionnaire measuring their socialization values for their children and a questionnaire measuring family communication; however, the small number of parent responses prevented the data from being used in statistical tests. Multiple regression analyses indicated that perceived parent values predicted emerging adult values. Moderation analyses showed that family communication and the quality of the relationship with father and mother did not strengthen the relationship between perceived parent values and emerging adult values. Lastly, a warm family environment and family activities were significantly related to how important emerging adults’ perceived intrinsic values to be to both their father and mother. Family structure was significantly positively correlated the importance emerging adults’ perceived their fathers ...
Date: August 2012
Creator: Wright, Amber N.
Partner: UNT Libraries

Characterization of Arthrobacter Globiformis Aspartate Transcarbamylase Concentrations of Substrates

Description: This thesis consists of one major section with two subsections. The first subsection investigates the activity of Arthrobacter globiformis aspartate transcarbamylase's specific activity with increasing concentrations of the enzyme's substrate. Dihydroorotase (DHOase) activity was also measured with increasing concentrations of the substrate dihydroorotate. The second subsection collected data in order to classify the enzyme, resulting in a classification into the category of class A ATCases with bifunctional ATCase-DHOase complexes. The thesis provides evidence to broaden understanding of the ATCase and DHOase enzymes for members of the family that Arthrobacter belongs to.
Date: December 2012
Creator: Wright, Jackie
Partner: UNT Libraries

Students' Attitudes Towards Rapport-building Traits and Practices in Online Learning Environments

Description: This research was a triangulated study of student attitudes towards instructors' rapport-building traits and their preferences amongst instructors' rapport-building practices in online learning environments. Participants were undergraduate and graduate students enrolled in courses within an educational technology program at a central Texas university. The study employed a mixed-methods approach involving the Likert-item assessment of learners' attitudes, the identification and prioritization of learner preferences through pairwise comparisons, and semi-structured interviews that provided richer, more detailed information. Findings indicated a strong preference for instructor-based traits and practices over pedagogically-based ones. These traits and practices loaded into the components of social presence, enjoyable interaction, and personal connection.
Date: December 2012
Creator: Wright, Robert Demmon
Partner: UNT Libraries

Performance Rights in Sound Recordings: the Impact of the Performance Rights Act on Radio, Records, and Performing Artists

Description: The original works of copyright holders included tangible creations, as music written on a page, thereby, extending copyright protection to songwriters and music publishers. Until 1995, absent from U.S. copyright law was protection for copyright owners of intangible sound recordings. the Performance Rights Act (PRA) seeks to amend the US copyright law in order to grant copyright holders of sound recordings the right to performance royalties from terrestrial broadcast radio. If passed, the legislation would be unprecedented in the United States. the PRA has implications for broadcast radio, record labels, and performing artists. This study includes historical and legal perspective of previous attempts at legislation of this nature and predicts outcomes of current legislation.
Date: May 2012
Creator: Wright-Harmon, Joy
Partner: UNT Libraries

Repression, Civic Engagement, Internet Use, and Dissident Collective Action: the Interaction Between Motives and Resources

Description: This dissertation investigates three questions: First, what conditions make dissident collective action such as protest, revolt, rebellion, or civil war more likely to happen in a country? Second, what conditions make citizens more likely to join in dissident collective action? Third, does Internet use play a role in dissident collective action, and if so, why? I argue that motives and resources are necessary rather than sufficient conditions for dissident collective action. I develop an analytical framework integrating motives and resources. Specifically, I theorize that state repression is an important motive, and that civil society is critical in providing resources. Four statistical analyses are conducted to test the hypotheses. Using aggregate level data on countries over time, I find that civil war is more likely to occur in countries where both state repression and civil society are strong. Moreover, the effect of civil society on civil war onset increases as the repression level rises. at the individual level using 2008 Latin American Public Opinion Project surveys from 23 Latin American and Caribbean countries, I find individuals more likely to join in protest when they experience both more repression and greater civic engagement. Moreover, civic engagement’s effect on protest participation increases as people experience more repression. I further find that Internet use constitutes a kind of civic engagement and has effects similar to voluntary group involvement. the effect of Internet use on protest participation decreases as a person’s civic engagement increases. Finally, an individual is more likely to join in protest when experiencing more repression and using the Internet more frequently. Moreover, the effect of Internet use on protest participation increases as a person experiences more repression.
Date: May 2012
Creator: Wu, Jun-deh
Partner: UNT Libraries

Drive Level Dependence of Advanced Piezoelectric Resonators

Description: Resonators are one of the most important parts of electronic products. They provide a stable reference frequency to ensure the operation of these products. Recently, the electronic products have the trend of miniaturization, which rendered the size reduction of the resonators as well [1]. Better design of the resonators relies on a better understanding of the crystals' nonlinear behavior [2]. The nonlinearities affect the quality factor and acoustic behavior of MEMS (Micro-Electro-Mechanical-System) and nano-structured resonators and filters [3]. Among these nonlinear effects, Drivel Level Dependence (DLD), which describes the instability of the resonator frequency due to voltage level and/or power density, is an urgent problem for miniaturized resonators [2]. Langasite and GaPO4 are new promising piezoelectric material. Resonators made from these new materials have superior performance such as good frequency-temperature characteristics, and low acoustic loss [2]. In this thesis, experimental measurements of drive level dependence of langasite resonators with different configurations (plano-plano, single bevel, and double bevel) are reported. The drive level dependence of GaPO4 resonators are reported as well for the purpose of comparison. The results show that the resonator configuration affects the DLD of the langasite resonator. Experiments for DLD at elevated temperature are also performed, and it was found that the temperature also affects the DLD of the langasite resonator.
Date: August 2012
Creator: Xie, Yuan
Partner: UNT Libraries

On Steinhaus Sets, Orbit Trees and Universal Properties of Various Subgroups in the Permutation Group of Natural Numbers

Description: In the first chapter, we define Steinhaus set as a set that meets every isometric copy of another set at exactly one point. We show that there is no Steinhaus set for any four-point subset in a plane.In the second chapter, we define the orbit tree of a permutation group of natural numbers, and further introduce compressed orbit trees. We show that any rooted finite tree can be realized as a compressed orbit tree of some permutation group. In the third chapter, we investigate certain classes of closed permutation groups of natural numbers with respect to their universal and surjectively universal groups. We characterize two-sided invariant groups, and prove that there is no universal group for countable groups, nor universal group for two-sided invariant groups in permutation groups of natural numbers.
Date: August 2012
Creator: Xuan, Mingzhi
Partner: UNT Libraries

A Meaningful Task: Investigating Into the Culture of Assessment in the Art Classroom of the Schools in Denton

Description: This is an enterpretivist cultural study on how the lively idea of assessment is enacted by the art teachers, students and administrators in Denton school art education, North Texas, the United States. This ethnographic research aims to extend understanding on assessment as vivid cultural and social dynamics that both reflects and enlivens varied and interconnected values promoted and shared among the people involved. Through a perspective of the culture of assessment, this study is expected to facilitate insights on art education as lived, purposeful experience bearing suggestions on a certain social environment and historical implications. Such insights as sought further illuminate specific understandings on art education in different cultural societies, such as China. From a Chinese native viewpoint, the researcher broadens her horizons on connection and independence important for informative performance of art education in the discourses of modern nation and schooling, as well as globalization. It is hoped that this study will interest other art educators, teachers, and researchers to make multiple and continuous efforts in further exploring the culture of assessment with cultural and historical consciousness and knowledge.
Date: December 2012
Creator: Yang, Ya
Partner: UNT Libraries

Evaluating the Effects of Video Modeling on the Frequency of Staff Use of Socially Embedded Consequences

Description: Previous research reports that individuals working with children with autism can positively affect social behavior through the use of socially embedded consequences. There is no research on training teachers to use socially embedded consequences. The current study had three purposes: to evaluate the effects of video modeling on teachers' embedded consequences, to evaluate the addition of feedback to increase effectiveness, and to evaluate the effects of the teacher's use of socially embedded consequences on other teacher behaviors. Results indicate that video modeling alone was not sufficient in changing teacher behavior and that the addition of feedback was necessary for meaningful teacher behavior change. Additionally, the increased used of socially embedded consequences had positive effects on teacher social engagement and indices of interest. A discussion of the results and suggestions for future research is also provided.
Date: August 2012
Creator: Yauger, Amy Elizabeth
Partner: UNT Libraries

The Quest for Perfect Appearance: an Examination of the Role of Objective Self-awareness Theory and Emotions

Description: Quality of appearance is important in nature and individuals have a basic need to establish the normality of appearance to confirm their acceptability to others. In daily inter-relationships of the same species, for instance, normal-appearing members of a species group reject or kill other members who appear abnormal. In human society, appearance is considered as one of the most direct sources of information about other people, and unattractiveness is often accompanied by negative judgments, which can cause emotional distress and isolation. Accordingly, humans tend to pay great attention to their personal appearance and make improvements to enhance their self-representations. The growth of the beauty and cosmetic surgery industries is an indication of an increasing willingness to enhance physical appearance. However, despite the growing demand for cosmetic procedures, the consumer research literature on this topic is extremely sparse. In fact, little is known about the attitudinal and motivational drivers that facilitate undergoing such procedures. This dissertation enriches our understanding of factors that affect consumers’ motivation to pursue cosmetic procedures and examines the role of emotions in such decisions. To that end, objective self-awareness (OSA) theory is applied and the interplay between the state of public OSA, beauty standards, and self-conscious emotions of shame and pride is explored. The results of two experimental studies indicate that access to beauty standards coupled with the state of public OSA generates self-standard comparison thoughts that may yield self-standard discrepancies. Negative emotions experienced due to such discrepancies move individuals into a self-regulatory cycle with the purpose of discrepancy reduction and impact their motivation to undergo cosmetic procedures. Pride and shame, two central self-conscious emotions, influence self-regulatory strategies and differently impact the approach to discrepancy reduction. These findings contribute to the research advocating the role of emotions in decision making and provide more insights about self-conscious emotions ...
Date: August 2012
Creator: Yazdanparast Ardestani, Atefeh
Partner: UNT Libraries

Student Facilitation and Predictors of Engagement in Peer-Led Literature Circle Discussions

Description: The purpose of this research was to examine the relation between students' personality traits and the extent of their engagement and facilitation in peer-led literature circle discussions. The research was guided by two questions. To what extent do reading ability, gender, and personality traits predict the quality of verbal engagement in literature circles? and How do highly engaged participants facilitate discussion in the circles? The researcher video-taped 17 fourth-grade students' literature circle discussions for a total of 136.7 minutes collected on two separate occasions across two weeks. To answer the first question student contributions in discussions were quantified into a measure of quality of verbal engagement score (cf. Costa & Kallick, 2000). This quality of verbal engagement score served as the dependent variable in a multiple regression. The seven independent variables were (1) extroversion, (2) agreeableness, (3) conscientiousness, (4) emotional stability, (5) openness, (6) reading ability, and (7) gender. The quantitative analysis in this study revealed that emotional stability was the only significant variable that predicted higher quality of verbal engagement. A post hoc analysis that included group size as an additional variable revealed that groups composed of three members correlated with higher overall quality of verbal engagement. The second question was answered through a qualitative analysis of the following: exploratory talk, elaborative feedback, topic management, confessionals, and accountability. Results of this analysis suggest that highly engaged students frequently enhance the group discussions through facilitation. This study extended the extant research by investigating individual factors that may influence the quality of literature circle discussions as well as suggested a framework for understanding facilitation in peer-led literature circle discussions. Further research is needed to determine the influence of group size and personality on varying grade levels.
Date: December 2012
Creator: Young, Chase
Partner: UNT Libraries

A Socio-ecological Assessment of Watershed Ecosystem Services in Southern Patagonia

Description: This thesis utilizes a theoretical framework which links biophysical and social domains of ecosystems via ecosystem services (ES), in order to conduct a socio-ecological assessment of urban watersheds in three communities in Chilean and Argentine regions of southern Patagonia. Results from this study show that expanding urban areas may be undermining the ability of local watersheds to provide for high quality ES posing potential risks to community wellbeing. Secondly, researchers and decision makers influencing regional natural resource management share similar values to general community members but do not capture the diversity of values that exist within the broader community, and dialogue between these groups on management issues is poor. A community-based management structure is recommended for the creation of adaptive and locally relevant management strategies.
Date: August 2012
Creator: Zagarola, Jean-Paul Aguirre
Partner: UNT Libraries

Looting and Restitution During World War II: a Comparison Between the Soviet Union Trophy Commission and the Western Allies Monuments, Fine Arts, and Archives Commission

Description: From the earliest civilizations, victorious armies would loot defeated cities or nations. the practice evolved into art theft as a symbol of power. Cultural superiority confirmed a country or empire’s regime. Throughout history, the Greeks and Romans cultivated, Napoleon Bonaparte refined, and Adolf Hitler perfected the practice of plunder. As the tides of Second World War began to shift in favor of the Allied Powers, special commissions, established to locate the Germans’ hoards of treasure, discovered Nazi art repositories filled with art objects looted from throughout Europe. the Soviet Union Trophy Commission and the Western Allies Monuments, Fine Arts, and Archives Commission competed to discover Nazi war loot. the two organizations not only approached the subject of plunder as a treasure hunt, but the ideology motivating both commissions made uncovering the depositories first, a priority. the Soviet trophy brigades’ mission was to dismantle all items of financial worth and ship them eastward to help rebuild a devastated Soviet economy. the Soviet Union wished for the re-compensation of cultural valuables destroyed by the Nazis’ purification practices regarding “inferior” Slavic art and architecture; however, the defeated German nation did not have the ability to reimburse the Soviet State. the trophy brigades implemented a process of restitution in kind to make physical reparations through the confiscation of Nazi war loot. the Western Allies disagreed with the Soviet Union’s policy. the Monuments, Fine Arts, and Archives Commission endeavored to return artwork looted by the Germans to the rightful owners or surviving descendants. Historically, the Western perspective of the Soviet Union’s actions was that the trophy brigades looted the conquered German Reich; however, during the period of Glasnost and after the fall of the Soviet Union, personal memoirs and interviews of Soviet trophy brigade members and museum officials have become available, and the Soviet viewpoint ...
Date: May 2012
Creator: Zelman, Laura Holsomback
Partner: UNT Libraries

Clustering Algorithms for Time Series Gene Expression in Microarray Data

Description: Clustering techniques are important for gene expression data analysis. However, efficient computational algorithms for clustering time-series data are still lacking. This work documents two improvements on an existing profile-based greedy algorithm for short time-series data; the first one is implementation of a scaling method on the pre-processing of the raw data to handle some extreme cases; the second improvement is modifying the strategy to generate better clusters. Simulation data and real microarray data were used to evaluate these improvements; this approach could efficiently generate more accurate clusters. A new feature-based algorithm was also developed in which steady state value; overshoot, rise time, settling time and peak time are generated by the 2nd order control system for the clustering purpose. This feature-based approach is much faster and more accurate than the existing profile-based algorithm for long time-series data.
Date: August 2012
Creator: Zhang, Guilin
Partner: UNT Libraries

My Land, My Life

Description: My Land, My Life is a documentary film about the woman, Jo Angela Lamb, who lives and works on Frying Pan Ranch in Texas Panhandle. the film explores the complexity of a ranch woman's experience that breaks the spell of the stereotyped image of American cowgirls. It also reflects on women ranchers’ relationship with their family members and their relationship with the land.
Date: May 2012
Creator: Zhang, Mingyun
Partner: UNT Libraries

Using the S-o-r Model to Understand the Impact of Website Attributes on the Online Shopping Experience

Description: Using Mehrabian and Russell’s (1974) stimulus (S) - organism (O) - response (R) model, this study developed online shopping experience framework that explains consumer behavioral responses toward online and offline stores. The results of the examined hypothesized relationships in this study reveal website attributes that create positive affective and attitudinal states and behavioral responses toward the retailers and retailers’ websites. Among website attributes, interface design is the strongest predictor of all behavioral responses, while website attributes relating to shopping services and security/privacy affect long term behavioral responses, such as purchase intention and brand loyalty. This study is imperative to practitioners and researchers, as they will help further develop online store environments and online shopping experience.
Date: August 2012
Creator: Zimmerman, Jonelle
Partner: UNT Libraries