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Self-definition and College Adaptation in Students From the Ronald E. McNair Postbaccalaureate Achievement Program
While a great deal of psychological research is conducted on college students, less has been done on their adaptation to college. These young adults, as they develop ego identity and differentiate themselves from parents and families, must adjust to the social and academic environment of college. Psychosocial adjustment predicts college retention better than academic predictors do. First generation college students face greater than typical challenges adapting to college. The Ronald E. McNair Post-Baccalaureate Achievement Program exists to aid first generation, lower income undergraduate student who wish to pursue a doctoral degree. Self-definition scored from thematic apperceptive technique stories reflects an individual’s relative freedom from social role constraint. This study examined the role of self-definition and familial understanding and acceptance in this population as predictors of successful adaptation to college. While neither was found to be a significant predictor, family understanding and acceptance was found to be a more defining characteristic of this sample than was self-definition. This suggests that when social support is sufficient, individuals do not need to rely on self-definition.
Phenotypic Morphological Plasticity Induced by Environmental Salt Stress in the Brine Shrimp, Artemia franciscana
Phenotypic plasticity is the ability of an organism to express different phenotypes in response to biotic or abiotic environmental cues. The ability of an organism to make changes during development to adjust to changes in its environment is a key to survival. Sexually reproducing organisms that have short life cycles and that are easy to raise in the laboratory are more conducive for developmental phenotypic plasticity. Considerable research has already been carried out on the brine shrimp, Artemia franciscana, regarding its morphology due to changing salinities. There is, however, little research considering subsequent generations and how there morphology might be affected by parental experiences. This study has examined: 1) the morphological effects of different rearing regimes of different salinity levels, and 2) the epigenetic transgenerational transfer of these morphological traits in A. franciscana. Measurements included rate of growth (as measured by instar), body size, body length, and other morphological traits. A gradual increase to more hyperosmotic conditions during development produced brine shrimp that were larger in size and also more developmentally advanced. Salinity stress experienced by adults had increased the growth rate in the F1 offspring of A. franciscana. Collectively, these data indicate that Artemia franciscana is a tractable model for investigating phenotypic plasticity. These findings have added to the ever-growing field of developmental phenotypic plasticity while also providing more information on the natural history and adaptive abilities of A. franciscana.
Dynamic Behaviors of Historical Wrought Iron Truss Bridges – a Field Testing Case Study
Civil infrastructure throughout the world serves as main arteries for commerce and transportation, commonly forming the backbone of many societies. Bridges have been and remain a crucial part of the success of these civil networks. However, the crucial elements have been built over centuries and have been subject to generations of use. Many current bridges have outlived their intended service life or have been retrofitted to carry additional loads over their original design. A large number of these historic bridges are still in everyday use and their condition needs to be monitored for public safety. Transportation infrastructure authorities have implemented various inspection and management programs throughout the world, mainly visual inspections. However, careful visual inspections can provide valuable information but it has limitations in that it provides no actual stress-strain information to determine structural soundness. Structural Health Monitoring (SHM) has been a growing area of research as officials need to asses and triage the aging infrastructure with methods that provide measurable response information to determine the health of the structure. A rapid improvement in technology has allowed researchers to start using new sensors and algorithms to understand the structural parameters of tested structures due to known and unknown loading scenarios. One of the most promising methods involves the use of wireless sensor nodes to measure structural responses to loads in real time. The structural responses can be processed to help understand the modal parameters, determine the health of the structure, and potentially identify damage. For example, modal parameters of structures are typically used when designing the lateral system of a structure. A better understanding of these parameters can lead to better and more efficient designs. Usually engineers rely on a finite element analysis to identify these parameters. By observing the actual parameters displayed during field testing, the theoretical FE models …
Determinants of Effort and Associated Cardiovascular Response to a Behavioral Restraint Challenge
This study directly tested implications of motivation intensity theory on effort to restrain against a behavioral urge or impulse (i.e. restraint intensity). Two factors were manipulated—magnitude of an urge and the importance of successfully resisting it—with cardiovascular (CV) responses related to active coping measured. Male and female undergraduate students were presented with a mildly- or strongly evocative film clip with instructions to refrain from showing any facial response. Success was made more or less important through coordinated manipulations of outcome expectancy, ego-involvement, and performance assessment. As expected, systolic blood pressure responses assessed during the performance period were proportional to the evocativeness of the clip when importance was high, but low regardless of evocativeness when importance was low. These findings support a new conceptual analysis concerned with the determinants and CV correlates of restraint intensity. Implications of the study and associations with current self-regulatory literature are discussed.
Reimagining “The Art of Phrasing” by Jean Baptiste Arban: Teaching Musical Style to Modern Day Trumpet Players
“The Art of Phrasing” is a chapter from Arban’s Complete Celebrated Method for the Cornet (published in 1864) that contains a selection of 150 melodies from Classical and early Romantic works. This section of Arban’s method was necessary for a new generation of cornet and trumpet players to learn melodic phrasing and style. A larger part of the trumpet solo repertoire was written for the clarino register or composed in fanfares due to the limitation of the valveless trumpet. The newly chromatic cornet grew to be a prominent solo instrument in symphonies and wind bands by the mid 19th century, and Arban's “Art of Phrasing” instructed players in musical style. Due to today’s vast number of musical genres, it is unlikely that present day students will be exposed to the melodies of “The Art of Phrasing.” With advancements in music streaming technology and with increased accessibility to countless recordings via the internet, trumpet players are able to access recordings of the melodies. However, there are errors and omissions in the chapter that prevents students from finding recordings with ease. This dissertation presents a new compilation of melodies organized by musical period from medieval to modern day, complete with proper title, composer name, chronological information, genre, and location within the selected work. In order to help students distinguish between musical styles, a brief description of characteristics from each musical period is provided, including information on the function of music in society, performance practice, and compositional trends in rhythm, melody, harmony, and expression.
Áskell Másson’s Solos for Snare Drum: Maximizing Musical Expression Through Varying Compositional Techniques and Experimentation in Timbre
This dissertation and accompanying lecture recital explores the musical elements present in Áskell Másson’s three solos for snare drum, PRÍM (1984), KÍM (2001) and B2B: Back to Basics (2010). Two of the primary challenges for the performer when playing solo literature on a non-pitch oriented instrument are identifying thematic structures and understanding how to interpret all innovative sound production techniques employed within the music. A thematic and compositional analysis, as well as an investigation into the experimentation of timbre found in Másson’s three pieces for solo snare drum will help to clarify the musical complexities that are present throughout.
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.
Organizational Behavior: Perceptions Analysis of Micro and Macro Organizational Behavior in an Organizational Setting
Understanding organizational behavior (OB) has profoundly influenced organizational performance and how people behave in organizations. Researchers have suggested various micro and macro organizational behaviors to be the impetus for high-performing organizations. Through a policy capturing approach this study builds on these findings by specifically examining the perceptions of micro and macro organizational behaviors in an organizational setting. The participants (n =181) completed a Micro and Macro Organizational Behavior Perceptions Questionnaire. Results showed perception differences exist between subordinates and supervisors. Additionally, participants perceived job satisfaction to be the most important micro organizational behavior, whereas organizational design was perceived to be the most important macro organizational behavior. However when comparing hierarchal positions in the organization, supervisors weighted leadership as the most important and subordinates weighted job satisfaction as the most important organizational behavior. While these findings only scratch the surface as to how organizational behavior is perceived, the implications challenge leaders to close the OB perception gap. Correspondingly, organizational behavior thinking may result in improving individual and organizational performance.
Fashioning Society in Eighteenth-century British Jamaica
White women who inhabited the West Indies in the eighteenth century fascinated the metropole. In popular prints, novels, and serial publications, these women appeared to stray from “proper” British societal norms. Inhabiting a space dominated by a tropical climate and the presence of a large enslaved African population opened white women to censure. Almost from the moment of colonial encounter, they were perceived not as proper British women but as an imperial “other,” inhabiting a middle space between the ideal woman and the supposed indigenous “savage.” Furthermore, white women seemed to be lacking the sensibility prized in eighteenth-century England. However, the correspondence that survives from white women in Jamaica reveals the language of sensibility. “Creolized” in this imperial landscape, sensibility extended beyond written words to the material objects exchanged during their tenure on these sugar plantations. Although many women who lived in the Caribbean island of Jamaica might have fit the model, extant writings from Ann Brodbelt, Sarah Dwarris, Margaret and Mary Cowper, Lady Maria Nugent, and Ann Appleton Storrow, show a longing to remain connected with metropolitan society and their loved ones separated by the Atlantic. This sensibility and awareness of metropolitan material culture masked a lack of empathy towards subordinates, and opened the white women these islands to censure, particularly during the era of the British abolitionist movement. Novels and popular publications portrayed white women in the Caribbean as prone to overconsumption, but these women seem to prize items not for their inherent value. They treasured items most when they came from beloved connections. This colonial interchange forged and preserved bonds with loved ones and comforted the women in the West Indies during their residence in these sugar plantation islands. This dissertation seeks to complicate the stereotype of insensibility and overconsumption that characterized the perception of white women …
Design, Synthesis and Study of Supramolecular Donor – Acceptor Systems Mimicking Natural Photosynthesis Processes
This dissertation investigates the chemical ingenuity into the development of various photoactive supramolecular donor – acceptor systems to produce clean and carbon free energy for the next generation. The process is inspired by the principles learned from nature’s approach where the solar energy is converted into the chemical energy through the natural photosynthesis process. Owing to the importance and complexity of natural photosynthesis process, we have designed ideal donor-acceptor systems to investigate their light energy harvesting properties. This process involves two major steps: the first step is the absorption of light energy by antenna or donor systems to promote them to an excited electronic state. The second step involves, the transfer of excitation energy to the reaction center, which triggers an electron transfer process within the system. Based on this principle, the research is focused into the development of artificial photosynthesis systems to investigate dynamics of photo induced energy and electron transfer events. The derivatives of Porphyrins, Phthalocyanines, BODIPY, and SubPhthalocyanines etc have been widely used as the primary building blocks for designing photoactive and electroactive ensembles in this area because of their excellent and unique photophysical and photochemical properties. Meanwhile, the fullerene, mainly its readily available version C60 is typicaly used as an electron acceptor component because of its unique redox potential, symmetrical shape and low reorganization energy appropriate for improved charge separation behavior. The primary research motivation of the study is to achieve fast charge separation and slow charge recombination of the system by stabilizing the radical ion pairs which are formed from photo excitation, for maximum utility of solar energy. Besides Fullerene C60, this dissertation has also investigated the potential application of carbon nanomaterials (Carbon nanotubes and graphene) as primary building blocks for the study of the artificial photosynthesis process.
Detection of Ulcerative Colitis Severity and Enhancement of Informative Frame Filtering Using Texture Analysis in Colonoscopy Videos
There are several types of disorders that affect our colon’s ability to function properly such as colorectal cancer, ulcerative colitis, diverticulitis, irritable bowel syndrome and colonic polyps. Automatic detection of these diseases would inform the endoscopist of possible sub-optimal inspection during the colonoscopy procedure as well as save time during post-procedure evaluation. But existing systems only detects few of those disorders like colonic polyps. In this dissertation, we address the automatic detection of another important disorder called ulcerative colitis. We propose a novel texture feature extraction technique to detect the severity of ulcerative colitis in block, image, and video levels. We also enhance the current informative frame filtering methods by detecting water and bubble frames using our proposed technique. Our feature extraction algorithm based on accumulation of pixel value difference provides better accuracy at faster speed than the existing methods making it highly suitable for real-time systems. We also propose a hybrid approach in which our feature method is combined with existing feature method(s) to provide even better accuracy. We extend the block and image level detection method to video level severity score calculation and shot segmentation. Also, the proposed novel feature extraction method can detect water and bubble frames in colonoscopy videos with very high accuracy in significantly less processing time even when clustering is used to reduce the training size by 10 times.
Addressing Multicultural Issues in the Counselor Education Classroom: a Phenomenological Analysis
Multicultural education in counselor education is a popular topic among counselor educators and scholars. To date, scholars have focused on understanding the experiences of counselor educators who teach dedicated multicultural courses. However, less attention has been given to other counselor educators who are required by ethical and training standards to address multicultural issues across the curriculum. The purpose of this study was to understand counselor educators’ experiences addressing multicultural issues in courses that do not have a specific multicultural or diversity focus. I used phenomenological methodology to explore the experiences of counselor educators who hold doctoral degrees in counseling or a related field, have taken a multicultural/diversity course in their graduate training, are full-time clinical or tenure-line faculty members in CACREP-accredited programs, and have never taught courses dedicated to multicultural or diversity issues. Twelve participants (six men and six women), ranging in age ranged from 31 to 65, participated in the study. Ten participants identified as White, one African-American, and one Hispanic. The research team identified eight themes: (1) reasons for avoidance, (2) constraints, (3) qualities and practices, (4) educator as a factor in student development, (5) infusion, (6) personal background, (7) awareness of biases and assumptions, and (8) counselor educator responsibility/gatekeeping. Findings from this study will add to the literature regarding infusion of multicultural issues across the curriculum. Additionally, the implications offered will serve as a resource for counselor educators as they experience unique personal and professional challenges when addressing multicultural issues in classrooms beyond the main multicultural or diversity course offered in counseling programs. Implications for this study may lead to development of more focused guidelines on how to increase the increase the comfort of counselor educators as they facilitate multicultural discussions and assist counselors-in-training in working toward cultural competence.
Moral Judgment and Digital Piracy: Predicting Attitudes, Intention, and Behavior Regarding Digital Piracy Using a Modified Version of the Defining Issues Test
Digital piracy, the illegal copying or downloading of copyrighted digital products without approval from the copyright holders, has brought great economic loss to the software and digital media industries. Previous studies using moral developmental theory have not found consistent relationships between moral judgment and attitudes towards digital piracy. While some researchers have developed individual test items to assess relationships between moral judgment and attitudes toward digital piracy, others have relied on the Defining Issues Test (DIT). However, in that the DIT represents a general measure of moral judgment based on broad social issues, it, too, may not adequately assess an individual’s reasoning specific to issues regarding digital piracy. The purpose of this study was to create a reliable instrument (i.e., DP-DIT) modeled after the DIT designed to assess moral judgment regarding digital piracy as well as to examine and compare the ability of both DP-DIT and DIT2-short to predict attitudes, intentions and behaviors regarding digital piracy of college students. Results indicated the reliability of both the DIT2-short and the DP-DIT were discounted, quite likely due to the small number of stories contained in each. DP-DIT appeared to have greater predictive ability due to its advantage in predicting attitudes toward digital piracy, especially using DP-DIT MNS. However, even though here DP-DIT MNS was the strongest predictor of attitudes toward digital piracy, it explained a limited amount of variance. Further research to improve reliability and validity of DP-DIT is warranted.
Digital Preservation of Federal Information Summit: Reflections
This report provides a synopsis of the Digital Preservation of Federal Information Summit held in San Antonio on April 3-4, 2016, including the event's structure, work sessions, and outcomes.
Working Together to Get It For Them: ILL and Document Delivery at the UNT Libraries
This presentation provides an overview of the document delivery process for UNT Libraries. Slides include reorganization of process to include use of ILLiad. Presented at the 2016 OCLC ILLiad International Conference.
So We Have a Brand, Now What?: Modernizing and Marketing an Ask Us Service at an Academic Library
This presentation provides an overview of the redesign of reference services at UNT Libraries using brand research and marketing strategies.
Extending the TAM2 Model: Card Swiping and Academic Librarians
Presentation discusses use of Technology Acceptance Model (TAM) and its extended modified TAM2 Model to examine pre- and post-implementation factors in adopting card swiping for libraries.
Assessing an Academic Library Professional Development Program
This presentation discusses assessment methods for UNT Libraries' professional development program.
Genre Terms for Tabletop Games
This document contains genre terms for cataloging table top games within the University of North Texas Libraries Media Library.
Demographic Trends of College Students Today & Tomorrow: How Do We Entice Them to Use the Academic Library?
This article discusses how libraries can use demographic trends to tailor library services to future populations.
The Case for a Publishing Analytics Data Alliance
Digital technology is making it possible for publishers and libraries to gather data on the dissemination and use of scholarly publications in unprecedented detail and on an unprecedented scale. While data arising from the digital distribution of content provides new opportunities for understanding the scholarly communication ecosystem, it also creates socio-technical challenges for understanding how scholarly content is shared and used across networked knowledge landscapes. Libraries and institutions will require the context that aggregate data can provide to effectively use the data they collect, but they will be unable to create this context alone. This risks leaving the collection of data in the hands of a small number of well-resourced organizations—likely commercial—that do not answer to the community. The proposed Publishing Analytics Data Alliance will serve as a cooperative in which representatives from all of the relevant academic publishing stakeholder groups (academic publishers, research libraries, research centers, and aggregators) collaborate to address the socio-technical challenges around publishing analytics: developing a data model, workflows, and prototype for aggregation and display of usage data relating to digital monographs, and creating an accompanying code of ethics and terms of use for data gathering, analysis, and dissemination by members.
Spotlight on North Texas: Grant Materials
These grant materials were prepared for a project funded by the National Endowment for the Humanities Common Heritage program to digitize, preserve, and provide access to community historical records. The award funded digitization of print and media items related to the motion picture history of Denton County and a lecture highlighting Denton’s film history and materials discovered during the program. For this grant, UNT served as the lead institution and collaborated with the Texas Archive of the Moving Image. The grant materials include a history of Denton County’s involvement in film production and distribution, digitization standards, and a work plan for the project. This proposal was funded for $11,840.
The Whole Picture - One Library's Assessment Activities
This presentation provides an overview of UNT's assessment activities in preparation for a new library strategic plan and campus SACS reaccreditation.
Southwest Retort, Volume 68, Number 5, January 2016
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
A High-fat Meal Alters Post-prandial mRNA Expression of SIRT1, SIRT4, and SIRT6
Sirtuins (SIRT) regulate the transcription of various genes involved in the development of diet-induced obesity and chronic disease; however, it is unknown how they change acutely following a high-fat meal. The purpose of this study was to determine the effect of a high-fat meal (65% kcals/d; 85% fat recommendation), on SIRT1-7 mRNA expression in blood leukocytes at 1, 3, and 5-h post-prandial. Men and women (N=24) reported to the lab following an overnight fast (>12H). Total RNA was isolated and reverse transcribed prior to using a Taqman qPCR technique with 18S rRNA as a normalizer to determine SIRT1-7 mRNA expression. An additional aliquot of serum was used to measure triglycerides. Data was analyzed using a RM ANOVA with P<0.05. Triglycerides (P<0.001; 124%) peaked at 3-h. SIRT 1 (P=0.004; 70%), and SIRT 6 (P=0.017; 53%) decreased expression at 3-h. SIRT4 (P=0.024) peaked at 5H relative to baseline (70%) and 3-h (68%). To our knowledge, this is the first study to report that consumption of a high-fat meal transiently alters SIRT mRNA expression consistent in a pattern that mirrors changes in serum triglycerides. Decrease in expression of SIRT1 and SIRT6 combined with an increased SIRT4 would be consistent with an increase in metabolic disease risk if maintained on a chronic basis.
Parameter Estimation of Microwave Filters
The focus of this thesis is on developing theories and techniques to extract lossy microwave filter parameters from data. In the literature, the Cauchy methods have been used to extract filters’ characteristic polynomials from measured scattering parameters. These methods are described and some examples are constructed to test their performance. The results suggest that the Cauchy method does not work well when the Q factors representing the loss of filters are not even. Based on some prototype filters and the relationship between Q factors and the loss, we conduct preliminary studies on alternative representations of the characteristic polynomials. The parameters in these new models are extracted using the Levenberg–Marquardt algorithm to accurately estimate characteristic polynomials and the loss information.
Parent-adolescent Attachment, Bullying and Victimization, and Mental Health Outcomes
Traditional and cyber bullying have been identified as universal problematic issues facing adolescents, and research is needed to understand correlates associated with these phenomena. Structural equation modeling analyses examined associations between attachment to parents, traditional and cyber bullying or victimization, and mental health outcomes among 257 high school students (Average age 15.9 years). Key patterns emerged, including associations between maternal attachment and mental health outcomes; victimization and mental health concerns; and bullying and victimization in both traditional and cyber contexts. The role of attachment to mothers and fathers varied by context. Findings extend the literature by identifying risk factors in adolescence associated with bullying and victimization, as well as suggesting appropriate prevention and intervention strategies to increase adolescent well-being.
Deformation Micro-mechanisms of Simple and Complex Concentrated FCC Alloys
The principal objective of this work was to elucidate the effect of microstructural features on the intrinsic dislocation mechanisms in two FCC alloys. First alloy Al0.1CoCrFeNi was from a new class of material known as complex concentrated alloys, particularly high entropy alloys (HEA). The second was a conventional Al-Mg-Sc alloy in ultrafine-grained (UFG) condition. In the case of HEA, the lattice possess significant lattice strain due to the atomic size variation and cohesive energy differences. Moreover, both the lattice friction stress and the Peierls barrier height are significantly larger than the conventional FCC metals and alloys. The experimental evidences, so far, provide a distinctive identity to the nature and motion of dislocations in FCC HEA as compared to the conventional FCC metals and alloys. Hence, the thermally activated dislocation mechanisms and kinetics in HEA has been studied in detail. To achieve the aim of examining the dislocation kinetics, transient tests, both strain rate jump tests and stress relaxation tests, were conducted. Anomalous behavior in dislocation kinetics was observed. Surprisingly, a large rate sensitivity of the flow stress and low activation volume of dislocations were observed, which are unparalleled as compared to conventional CG FCC metals and alloys. The observed trend has been explained in terms of the lattice distortion and dislocation energy framework. As opposed to the constant dislocation line energy and Peierls potential energy (amplitude, ΔE) in conventional metals and alloys, both line energy and Peierls potential undergo continuous variation in the case of HEA. These energy fluctuations have greatly affected the dislocation mobility and can be distinctly noted from the activation volume of dislocations. The proposed hypothesis was tested by varying the grain size and also the test temperature. Activation volume of dislocations was a strong function of temperature and increased with temperature. And the reduction in grain …
Congressional Globe OCR Dataset
Dataset of OCR text from the Congressional Globe collection in the UNT Digital Library. In all there are 112 volumes and 104,615 pages of text in this dataset.
Organizational Learning Capacity As a Predictor of Individuals’ Tendency Towards Improvisation in Nonprofit Organizations in Saudi Arabia
The study is undertaken for a more compressive understanding for organizational theory and its applicability to tendency towards improvisation during emergency times among individuals in Non Profit Organizations (NPOs) in Saudi Arabia. The analysis involved an examination of direct effect of learning on tendency towards improvisation and possible mediating effects between organizational learning and tendency towards improvisation among individuals in NPOs, while controlling for key demographic differences (e.g. individuals’ age, education level and years in service, number of full-time staff and volunteers). Self-administered questionnaires were distributed to full-time employees in 13 NPOs in three cities in the western area of Saudi Arabia, namely Jeddah, Makkah and Madinah (N= 304). The main statistical method employed to hypotheses examination was Structural Equation Modeling. The hypothesis examination resulted in three out of five hypnotized paths are to be significant. Two direct relations were interpreted as outcomes of organizational learning, with increases in the level of organizational learning is being positively related to individuals’ self –efficacy and agility. The third significant path interpreted as individuals’ agility is positively related to their tendency to improvise during emergency times, which indicates organizational learning has indirect effect on tendency towards improvisation. Finally, the applicability of organizational learning theory to the field of emergency management and suggestions for future research in light of the findings of this research are also discussed.
A Precise Few-nucleon Size Difference by Isotope Shift Measurements of Helium
We perform high precision measurements of an isotope shift between the two stable isotopes of helium. We use laser excitation of the 2^3 S_1-2^3 P_0 transition at 1083 nm in a metastable beam of 3He and 4He atoms. A newly developed tunable laser frequency selector along with our previous electro-optic frequency modulation technique provides extremely reliable, adaptable, and precise frequency and intensity control. The intensity control contributes negligibly to overall experimental uncertainty by stabilizing the intensity of the required sideband and eliminating the unwanted frequencies generated during the modulation of 1083 nm laser carrier frequency. The selection technique uses a MEMS based fiber switch and several temperature stabilized narrow band (~3 GHz) fiber gratings. A fiber based optical circulator and an inline fiber amplifier provide the desired isolation and the net gain for the selected frequency. Also rapid (~2 sec.) alternating measurements of the 2^3 S_1-2^3 P_0 interval for both species of helium is achieved with a custom fiber laser for simultaneous optical pumping. A servo-controlled retro-reflected laser beam eliminates residual Doppler effects during the isotope shift measurement. An improved detection design and software control makes negligible subtle potential biases in the data collection. With these advances, combined with new internal and external consistency checks, we are able to obtain results consistent with the best previous measurements, but with substantially improved precision. Our measurement of the 2^3 S_1-2^3 P_0 isotope shift between 3He and 4He is 31 097 535.2 (5) kHz. The most recent theoretic calculation combined with this measurement yields a new determination for nuclear size differences between 3He and 4He: ∆r_c=0.292 6 (1)_exp (8)_th (52)_exp fm, with a precision of less than a part in 〖10〗^4 coming from the experimental uncertainty (first parenthesis), and a part in 〖10〗^3 coming from theory. This value is consistent with electron scattering …
Community-based Participatory Research: HIV in African American Men Who Have Sex with Men
To date, traditional behavioral interventions have done little to reduce the prevalence and transmission of HIV among African American men who have sex with men (AAMSM), a highly at risk group. Some researchers theorize that the lack of success may be because these interventions do not address contextual factors among AAMSM. Community-based participatory research (CBPR) is one approach to research with the potential to lead to effective interventions in the future. CBPR is a collaborative, mixed-methods and multidisciplinary, approach to scientific inquiry, which is conducted with, and within, the community. The current study follows the CBPR approach to engage and develop a relationship with the African American communities in the Dallas/Fort Worth Metroplex. Contextual issues were discussed in order to identify emerging themes regarding HIV health related issues among AAMSM to provide the groundwork for continued CBPR research and future interventions with AAMSM in the Dallas/Fort Worth Metroplex. To accomplish this goal, researchers began the CBPR process by conducting interviews and focus groups with a sample of approximately 62 (34 from key informant interviews, 28 from focus groups [gender balanced]) AIDS service organization leaders and workers, advocates, medical doctors and community members with first-hand knowledge of HIV health issues in the AAMSM community. Transcripts of these interviews and focus groups were analyzed to identify emerging themes at the societal (religious doctrine, African American Culture, age-related norms and stigma), community (education, religious views/policy and community norms) and individual (disclosure, personal identity, sexual behavior/risk, accessing care and communication) levels. This data was used to create a holistic narrative report that will be used to direct the community advisory board (CAB) and guide future research and interventions.
Genetic Analysis of Medicago truncatula Plants with a Defective MtIRE Gene
Leguminous plants are able to fix nitrogen by establishing a symbiotic relationship with soil dwelling bacteria, called rhizobia. The model plant Medicago truncatula forms a partnership with Sinorhizobium meliloti whereby the plant gains bioavailable nitrogen and in exchange the bacteria gains carbohydrates. This process occurs within nodules, which are structures produced on the roots of the plants within which nitrogen is fixed. M. truncatula incomplete root elongation (MtIRE) was localized to the infection zone, which is zone II of indeterminate nodules. It was shown to encode a signaling kinase so it was anticipated to play a role in nodulation. Mutants of MtIRE in the R108 background, mutagenized with the Tnt1 retrotransposon, were obtained from reverse screen, and were assessed to determine if a disrupted MtIRE gene was the cause of nitrogen fixation defective nodules. Mutant line NF1320, having a mutant phenotype, showed typical Mendelian segregation of 3:1 when backcrossed to R108. Experimental results show that MtIRE gene is not the cause of the mutant phenotype, but was linked to the causative locus. MtIRE co-segregated with the mutant phenotype 83%. Southern blot and the first version of the M. truncatula genome (version 3.5) reported a single MtIRE gene and this was shown to be on chromosome 5 but the latest version of the M. truncatula genome (version 4.0) showed a second copy of the gene on chromosome 4. The genome sequence is based on the A17 reference genome. Both genes are 99% identical. Genetic markers that originate from flanking sequence tags (FSTs) on both chromosome 4 and 5 were tested in an attempt to find an FST that co-segregated with the mutant phenotype 100%. An FST derived from a Tnt1 insertion in Medtr4g060930 (24F) co-segregated with the mutant phenotype closely, with 76% co-segregation. Medtr4g060930 (24F) is on chromosome 4, making it …
Effect of Acute Alcohol Ingestion on Resistance Exercise Induced mTORC1 Signaling in Human Muscle
The purpose of this project was to further elucidate the effects post-exercise alcohol ingestion. This project had many novel aspects including using a resistance exercise (RE) only exercise design and the inclusion of women. To our knowledge, we are the first to investigate the effect of post-RE alcohol ingestion in women. In the first chapter of this project, information on the prevalence of alcohol use and the importance of skeletal muscle as a dynamic and metabolic tissue was provided. In chapter two, the effects of post-RE alcohol ingestion in men and women are detailed. The major findings of this study was that although RE elicited similar mTORC1 signaling both in men and in women, alcohol ingestion appeared to only attenuate RE-induced phosphorylation of the mTORC1 signaling pathway in men. The third chapter focused on examining the effects of post-RE alcohol ingestion on acute testosterone bioavailability. The primary findings of this study was that alcohol substantially elevated serum total and free testosterone concentrations during recovery from a bout of resistance exercise. The fourth chapter detailed factors that contribute to bone density in men. The major findings of this study was that young adult male long-distance runners who participated in resistance training at least once per week had greater bone mineral density than their non-resistance trained and non-exercise trained peers.
Does an Online Post-baccalaureate Secondary Teacher Certification Program Produce Certified Teachers Who Remain in the Field?
Given issues in education concerning teacher shortages, the omnipresence of alternative certification programs and the growth of online programs in higher education, this study investigated teacher retention for 77 secondary education teachers who completed an online teacher preparation program in Texas. Teacher retention was examined from 2003-2013 and investigated the influence of factors such personal characteristics, working conditions and school setting characteristics on teacher retention. Data was collected electronically utilizing a survey instrument designed by two teacher education experts and I. A total of 21 variables and two open-ended questions were investigated using the survey instrument. Exploratory factor and hierarchical multiple regression analyses were conducted to identify a multi-factor model for teacher retention utilizing the participants' survey responses. These analyses yielded evidence of the program's effectiveness in preparing teachers for long careers. Specifically, the areas of program support, field experience, and classroom management were statistically significant factors that contributed positively to teacher retention. Additionally, variables outside the program, were examined. These factors included personal characteristics, working conditions, and school setting factors. The predictor model accounted for 56% of the variance; F (17, 54) = 3.015; p = < 0.001. In particular, working conditions contributed to 41% of the variance associated with the teacher retention model. A qualitative analysis of open-ended survey questions was used to further examine decisions to remain in teaching. Support of administration, colleagues, staff, and parents was shown to influence teacher retention.
Social Cognitive Career Theory, Academic Choice Behavior, and Academic Performance in African American College Students
The current study examined the impact that components of Social Cognitive Career Theory (SCCT) have on choice behavior and academic performance in African American or Black, undergraduate students. SCCT is a highly valued and researched theory, but few studies examine the impact that SCCT components have on choice behavior and academic performance in Black college students. This study focused on evaluating SCCT components’ relevance to variables that have been shown to predict later objective career success. This is important because African Americans tend to have significantly lower paying and less prestigious jobs, as well as attain lower levels of education than most other racial populations in the United States. However, there is a paucity of current career development and attainment literature specific to the African American undergraduate population. In an effort to promote understanding of within group differences in SCCT variables that can contribute to educational and career success, 247 African American undergraduates were recruited to participate in this study. The participants completed online questionnaires regarding demographic information, self-efficacy, contextual barriers, contextual supports, choice goals, and choice behavior. Participants also gave permission for researchers to access grades. Findings indicate that academic coping self-efficacy, contextual barriers, and contextual supports may be particularly important to academic choice behavior in African American college students. Further, choice behavior appears to be important to grade point average. Implications, limitations, and recommendations for future research associated with this study’s findings are discussed.
The Comparative Analysis of Slovakian Folk Elements From Béla Bartók’s for Children in Paul Schoenfield’s Slovakian Children’s Songs
Paul Schoenfield’s Slovakian Children’s Songs for flute and piano is a unique work in the flute repertoire, incorporating Slovakian folk quotes from Béla Bartók’s For Children (Volume II, Based on Slovakian Folk Tunes) with layers of Slovakian folk elements used in the overall texture. The primary objective of this dissertation is to expand the limited resources available to flutists regarding Slovakian Children’s Songs. Detailed comparative analysis will demonstrate both Paul Schoenfield’s use of Slovakian folk tunes in the piece and his compositional style. In addition, this dissertation will develop the performer’s understanding of the work through background information, comparative analysis, and interviews to encourage insightful and informed performance. The dissertation’s purpose will be achieved through examining 1) the life, historical, and musical background of Paul Schoenfield and Slovakian Children’s Songs, as well that of Béla Bartók and For Children, and 2) how Schoenfield quotes and arranges Bartók’s For Children by providing a comparative analysis. Interviews with both the composer and Carol Wincenc will be included in the dissertation along with performance suggestions received directly from Carol Wincenc in the appendix.
Healthcare Utilization and Health Outcomes: US-born and Foreign-born Elderly Asian Americans
In order to better understand variations of health behaviors between US-born and foreign-born elderly Asian Americans (65+) in the United States, the research aims to explore relationships among health outcomes, healthcare utilization, and sociodemographic characteristics. Data from the National Health Interview Survey 1998-2012 is used to construct structural equation models for the US born group and for the foreign born group. The results found that there is a reciprocal relationship between health outcomes and healthcare utilization in both groups. Use of healthcare services can positively affect health outcomes, while better health outcomes reduce the need for healthcare utilization. In addition, some sociodemographic characteristics, such as age, sex, and marital status have a direct effect on health outcomes, but some others, such as education, family size and combined family income, have an indirect effect on health outcomes via healthcare utilization. The region of residency has both direct and indirect effects on health outcomes. Regarding the effects of predictors on health outcomes, US-born elderly Asians usually receive more health advantages from using institutional health services than foreign-born elderly Asians. Practitioners, social gerontologists, and policy makers should be cautious about assuming that there is a positive impact of increased healthcare utilization on health outcomes in elderly Asian Americans.
Derivation: Excerpts From a Novel
The dissertation consists of a critical preface and excerpts from the novel Derivation. The preface details how the novel Derivation explores the tension between the artist and the academy in the university, as well as the role memory plays in the construction of fictional narratives. The preface also details how narrative voice is used to expand the scope of Derivation, and ends with a discussion of masculine tropes in the novel. Derivation traces the path of a woman trying to rebuild her life in the wake of the 2008 financial crisis, returning first to her blue collar roots before pursuing a career as an academic.
“Wolf Man”
This creative nonfiction dissertation is a memoir that probes the complex life and death of the author’s father, who became addicted in his late forties to crack cocaine. While the primary concerns are the reasons and ways in which the father changed from a family man into a drug addict, the memoir is also concerned with themes of family life, childhood, and grief. After his father’s death, the author moves to Las Vegas and experiences similar addiction issues, which he then explores to help shed light on his father’s problems. To enrich the investigation, the author draws from eclectic sources, including news articles, literature, mythology, sociology, religion, music, TV, interviews, and inherited objects from his father. In dissecting the life of his father, the author simultaneously examines broader issues surrounding modern fatherhood, such as cultural expectations, as well as the problems of emptiness, isolation, and spiritual deficiency.
Learning From the Autograph: a New Critical Approach to Performing Liszt’s Sonata in B Minor
The Sonata in B minor occupies a hallowed position in Liszt’s oeuvre, according to scholarly assessment. Despite the plethora of literature on this consummate work, the vast majority of writings on the sonata have focused almost exclusively on formal innovation, thematic transformation, and programmatic speculation, and there is a dearth of interpretative analysis of the sonata based on its fascinating autograph manuscript, even though it has been publicly accessible and widely available in facsimile for some four decades now. In view of the fact that the autograph manuscript has never been examined for the express purpose of improving performance of the sonata, this dissertation proposes to approach this problem with the direct examination of the autograph and its numerous additions and deletions, and the analysis of the many interpretive implications stemming from the surprising insights offered by the autograph itself, which is on deposit at the Pierpont Morgan Library in New York City. The goal of the dissertation is to make readily accessible a comprehensive performance-oriented study of this summit of pianism, offering solutions to the many discrepancies among its various published editions, from the first Breitkopf & Härtel in 1854 to the most recent Peters Urtext in 2011, and including photographic reproductions of the unpublished material obscured behind and beneath the collettes (idiosyncratic terminology for additional pieces of paper pasted over the manuscript) together with the author’s engraved transcriptions thereof. In sum, the dissertation provides guidance and solutions for the various forms of virtuosic and interpretive problems that earn the sonata its reputation for being one of the most difficult works in the repertoire to understand and perform.
Intuitive Eating in Adolescents: Testing a Psychosocial Model
Intuitive eating is defined as an adaptive eating process that involves focusing on internal hunger and satiety to guide eating behavior, using those physiological cues rather than emotions to determine when to eat, and choosing what to eat based upon preference and not external rules and expectations. The purpose of this study was to examine intuitive eating within the context of contemporary sociocultural models of eating in 701 early adolescent boys and 769 early adolescent girls. Support was found for the model and suggested that pressures to lose weight or gain muscle, restrictive messages about food from caregivers, and internalization of the thin ideal were related to the early adolescents’ intuitive eating behaviors, suggesting that many of the sociocultural variables that have been found to impact disordered eating are salient for understanding healthy eating behaviors. However, the relations among many of the variables, as well as the model’s ability to explain intuitive eating overall, were stronger in girls than in boys. These findings can be used to help parents and schools begin to teach early adolescents about intuitive eating and how they can resist external pressures that may negatively influence their eating behaviors.
Contributing Factors in the Development of Complex Post-traumatic Stress Disorder Among Survivors of Interpersonal Violence
An understanding of factors that contribute to Complex Post Traumatic Stress Disorder (CPTSD) is of considerable importance to inform the prevention and treatment of the disorder. Moreover, gaining a better understanding of the factors that contribute to the etiology of CPTSD is of interest since most research to date focuses on the etiology of PTSD. Therefore, the purpose of the current study is to test the hypothesized prediction between childhood exposure to violence, childhood attachment, current interpersonal factors, and CPTSD symptoms. Using data from a community clinic and shelter serving victims of domestic violence and sexual assault, a partial least squares path analysis approach was employed to test the model’s strength in predicting contributing factors of CPTSD. Results support the proposed model, however, an alternative and more parsimonious model was found to be superior and revealed relationships between interpersonal variables and CPTSD. Specifically, women who reported child abuse and poor attachment with either parent, a perceived lack of current emotional and tangible support, and recent intimate partner violence (IPV) also reported symptoms of CPTSD. However, other variables, such as adult attachment avoidance and anxiety did not influence IPV or CPTSD as expected. Ultimately, the current findings lend support for Herman’s (1992) original conceptualization of CPTSD symptoms observed in survivors of prolonged and repeated trauma. Implications of these findings are discussed and results highlight the importance of assessing the contextual factors (e.g., social support, family environment) when a victim of prolonged trauma comes for treatment. Lastly, treatment implications and specific points of intervention are presented.
Parenting Style, Frequency of Electronic Communication with Parents, and the Development of Independence in First Year, First Semester College Students
During the transition to college, emerging adults are expected to develop independence and increase individual responsibility as they live away from home for the first time. Modern electronic communication has enabled emerging adults to maintain frequent, daily contact with the parent, a pattern of communication Hofer refers to as an “electronic tether.” This study examined the link between parenting style and the development of independence of first year, first semester college students. Although these students were in frequent contact with their designated parent, no correlation between frequency of communication and parenting style or independence was found. Both authoritative and helicopter parenting significantly positively predicted attitudinal independence. However, permissive parenting functioned as a significant negative predictor. Authoritarian, permissive, and helicopter parenting significantly positively predicted conflictual independence. However, authoritative parenting functioned as a significant negative predictor. Both authoritative and helicopter parenting significantly positively predicted emotional and functional independence.
Efficacy in Texas Charter Schools Compared to Traditional Public Schools
The need to spur innovation and improve student performance initiated the formation of, under different legislative acts, charter schools that include variations of traditional public schools. With the enthusiasm and level of investment going into the formation of charter schools, it is necessary to explore whether these schools have achieved their objectives. This study explored whether Texas open enrollment charter schools perform bettered compared to Texas public schools. The study applied a causal comparative quantitative research design. School data on graduation and dropout rates, college preparation, attendance rates, and overall performance were analyzed quantitatively. Student achievement data available for statistical analysis includes student performance on the Texas Assessment of Knowledge and Skills (TAKS) state assessment from 2007 to 2011. Data analysis for race, special programs, at risk, economically disadvantaged, and limited English proficiency was incorporated. Descriptive statistics and analysis of variance techniques were included in the data analysis. The analysis extended to post hoc tests to determine variables that caused variation. The study found Texas open-enrollment charter schools had more African American students but fewer Whites compared to public schools. Students in public schools performed better than those in charter schools, and Whites yielded the best performance. Charter schools had high dropout rates, low attendance, and low graduation rates, while public schools had low dropout rates, high attendance, and high graduation rates. Finally, public schools had more students ready for college than charter schools.
Singing in English in the 21St Century: a StudyComparing and Applying the Tenets of Madeleine Marshall and Kathryn Labouff
The English diction texts by Madeleine Marshall and Kathryn LaBouff are two ofthe most acclaimed manuals on singing in this language. Differences in style between the two have separated proponents to be primarily devoted to one or the other. An in-depth study, comparing the precepts of both authors, and applying their principles, has resulted in an understanding of their common ground, as well as the need for the more comprehensive information, included by LaBouff, on singing in the dialect of American Standard, and changes in current Received Pronunciation, for British works, and Mid-Atlantic dialect, for English language works not specifically North American or British. Chapter 1 introduces Marshall and The Singer’s Manual of English Diction, and LaBouff and Singing and Communicating in English. An overview of selected works from Opera America’s resources exemplifies the need for three dialects in standardized English training. Chapter 2 reviews notational and diction resources, and use of the International Phonetic Association’s alphabet (IPA). Chapter 3 directly compares Marshall and LaBouff’s views of the importance of the unstressed syllable, often schwa [ә] or open I [ɪ], as vital to allowing the audience to understand the flow of the sung text, and contrasts their differences regarding < r >. Chapter 4 discusses observations in applying the tenets with singers, focusing on three arias coached for this dissertation. Chapter 5 states conclusions and opportunities for further research. Figures include materials from the Juilliard School Archives. Appendices include interviews.
The Virtual Classroom As a Tool for the Assessment of Automatic and Controlled Processing in Autism Spectrum Disorders
Assessment of executive functioning in neurodevelopmental disorders (e.g., autism) is a crucial aspect of neuropsychological evaluations. The executive functions are accomplished by the supervisory attentional system (SAS) and include such processes as inhibition, switching, and planning. Autism spectrum disorder (ASD) tends to present similarly to other neurodevelopmental disorders (e.g., ADHD). For example, ASD and ADHD may share similar etiological underpinnings in the frontostriatal system of the frontal lobe. Research on executive functioning in ASD has been mixed, thus the precise nature of executive functioning deficits in ASD remains equivocal. In recent years, simulation technologies have emerged as an avenue to assess neurocognitive functioning in individuals with neurodevelopmental disorders impacting frontostriatal function. Simulation technology enables neuropsychologists to assess neurocognitive functioning within a testing environment that replicates environments in which the subject is likely to be in everyday life, as well as present controlled, real-world distractions, which may be better able to tap “hot” executive functions. A Virtual Classroom Continuous Performance Test (CPT) has been used successfully to assess attention in individuals with neurodevelopmental disorders impacting frontostriatal function. The current study aimed to investigate executive functioning in individuals with high functioning ASD using a new construct driven Stroop assessment embedded into the Virtual Classroom. Group differences were found in the Virtual Classroom with distractions condition, indicating individuals with ASD may be more vulnerable to external interference control than neurotypical individuals.
Middle School Choir Directors’ Perceptions and Applications of Multicultural Music Education
The purpose of this descriptive study was to discover Texas middle school choir directors’ perceptions and applications of multicultural education in their classrooms. Three research questions guided this investigation: (1) What were middle school choir director’s perceptions about multicultural music education?; (2) How did middle school choir directors apply multicultural music pedagogy in their classrooms?; and (3) How did middle school choir directors perceive professional development opportunities in multicultural music education? Texas middle school choir directors perceived that the purpose of multicultural music was to expose students to different cultures and diverse worldviews through music. Teachers listed several social and musical benefits of studying multicultural music including broadening musical horizons, cultural appreciation, and expansion of student worldviews. Teachers consciously programmed multicultural music for most of their concerts, and some chose literature based on their students’ cultural backgrounds. Although most teachers tried to make multicultural music experiences genuine for students, authenticity was the foremost pedagogical concern regarding multicultural music pedagogy. Teachers tended to utilize a combination of music concept and sociocultural approaches when teaching multicultural music by comparing multicultural music to Western music and using classroom discussions to discuss social issues that lend context to the music. Professional development opportunities in multicultural music education were available through the state music organization (TMEA), but rarely at the district or the campus level. Teachers also reported opportunities at the national level for professional development.
Back on the Home Front: Demand/Withdraw Communication and Relationship Adjustment Among Student Veterans
Today’s military encompasses a wide variety of families who are affected by deployments in multiple and complex ways. Following deployments, families must reconnect in their relationships and reestablish their way of life. Appropriate and effective communication during this time is critical, yet many military couples struggle with this process. Moreover, student service members/veterans and their families are in a unique position. In addition to coping with changes in their marital relationship, student veterans may feel isolated or unsupported on college campuses, often experiencing anxiety, depression, posttraumatic stress, or suicidality. The current study seeks to bridge the gap between the military family literature and the student service member/veteran literature by examining how deployment experiences, mental health issues, and communication patterns influence post-deployment relationship adjustment among student veterans. Analyses tested whether communication style and/or current mental health concerns mediate associations between combat experiences and couples’ relationship adjustment, as well as between experiences in the aftermath of battle and relationship adjustment. Results suggest that although posttraumatic stress is significantly related to deployment experiences among student veterans, participants report no significant negative effects of deployment on relationship adjustment. Communication style, however, was significantly associated with relationship adjustment, and a lack of positive communication was found to correlate with PTSD diagnosis. Research and clinical implications are discussed.
Can Akers’ Social Structure and Social Learning Theory Explain Delinquent Behaviors Among Turkish Adolescents?
The aim of this study was to examine to what extent Social Structure and Social Learning Theory (SSSL) explains delinquent behaviors among Turkish adolescents. While Social Structure and Social Learning (SSSL) Theory have been examined quite frequently in the criminology and sociology literature, the present study is unique as it tests the theory in Turkey, a context with a mixed Islamic and Secular cultural structure. The data originates from a survey conducted in Istanbul in 2008 by the Icelandic Centre for Social Research and Analysis (ICSRA) under the auspices of their Youth in Europe project. The sample includes 2,445 Turkish high school students. The dependent variable includes a 13-item delinquency scale, and the independent variables consist of differential association, costs and rewards of differential reinforcement, definitions, imitation, differential location in the social structure, and differential social location of groups. The statistical analyses were conducted using a negative binomial regression approach. Results demonstrated that differential association (peer delinquency) is positively associated with delinquent behaviors among Turkish adolescents. In addition, there is a significant and positive relationship between norms/beliefs that favor delinquency and delinquent behaviors. Moreover, parental reaction, a measure of differential reinforcement, has a negative impact on delinquency. Imitation variables, which include witnessing an argument and witnessing violence in the family, also appear as significant predictors for delinquency. Gender is the only social structure variable significantly related to delinquent behaviors. Furthermore, results indicated that social learning variables mediated the relationship between social structure and delinquent behaviors. Policy implications and suggestions for further studies are also provided at the end of the dissertation.
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