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477
Cognitive Performance as a Function of Sleep Disturbance in the Postpartum Period
New mothers often complain of impaired cognitive functioning, and it is well documented that women experience a significant increase in sleep disturbance after the birth of a child. Sleep disturbance has been linked to impaired cognitive performance in several populations, including commercial truck drivers, airline pilots, and medical residents, though this relationship has rarely been studied in postpartum women. In the present study 13 pregnant women and a group of 22 non-pregnant controls completed one week of actigraphy followed by a battery of neuropsychological tests and questionnaires in the last month of pregnancy (Time 1) and again at four weeks postpartum (Time 2). Pregnant women experienced significantly more objective and subjective sleep disturbance than the control group at both time points. They also demonstrated more impairment in objective, but not subjective cognitive functioning. Preliminary analyses indicated increased objective sleep fragmentation from Time 1 to Time 2 predicted decreased objective cognitive performance from Time 1 to Time 2, though small sample size limited the power of these findings. Implications for perinatal women and need for future research were discussed.
Date:
August 2015
Creator:
Wilkerson, Allison K.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Supporting Mathematics Understanding Through Funds of Knowledge
Parents are often criticized for the types of roles they play in their children’s education. Rather than assuming parents do not contribute to their children’s learning, this study identified the various ways Hispanic parents support mathematics learning in the home. Using a funds of knowledge lens, the history, practices, and experiences of families that contributed to their children’s mathematics understanding was explored. The purpose of this study was to identify the unique funds of knowledge among three Hispanic families living in the same city, specifically, how parents supported their children’s mathematics learning through funds of knowledge. Five Hispanic parents from three households participated in a series of three home interviews. The semi--‐structured interviews addressed family, school, and educational history of the parents, routines of the household, and perceived roles parents played in their children’s mathematics learning. Participants contributed to their children’s mathematics learning through various funds of knowledge including time management, music, sports, construction, shopping, and cooking. Participating parents shared knowledge with their children through questioning and discussion, providing experiences, and promoting practice. In this study, participants valued education and supported their children’s mathematics learning at home and school activities. This study contributes to the existing funds of knowledge research …
Date:
August 2015
Creator:
Williams, Julie J.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Doctoral Recital: 2015-04-15 - Daniel Wilson, trumpet
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
April 15, 2015
Creator:
Wilson, Daniel
Object Type:
Sound
System:
The UNT Digital Library
Doctoral Recital: 2015-02-11 - Laehyung Woo, piano
Recital presented at the UNT College of Music Recital Hall.
Date:
February 11, 2015
Creator:
Woo, Laehyung
Object Type:
Sound
System:
The UNT Digital Library
Variational Calculations of Positronium Scattering with Hydrogen
Positronium-hydrogen (Ps-H) scattering is of interest, as it is a fundamental four-body Coulomb problem. We have investigated low-energy Ps-H scattering below the Ps(n=2) excitation threshold using the Kohn variational method and variants of the method with a trial wavefunction that includes highly correlated Hylleraas-type short-range terms. We give an elegant formalism that combines all Kohn-type variational methods into a single form. Along with this, we have also developed a general formalism for Kohn-type matrix elements that allows us to evaluate arbitrary partial waves with a single codebase. Computational strategies we have developed and use in this work will also be discussed.With these methods, we have computed phase shifts for the first six partial waves for both the singlet and triplet states. The 1S and 1P phase shifts are highly accurate results and could potentially be viewed as benchmark results. Resonance positions and widths for the 1S-, 1P-, 1D-, and 1F-waves have been calculated.We present elastic integrated, elastic differential, and momentum transfer cross sections using all six partial waves and note interesting features of each. We use multiple effective range theories, including several that explicitly take into account the long-range van der Waals interaction, to investigate scattering lengths for the 1,3S …
Date:
December 2015
Creator:
Woods, Denton
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Attachment Theory Within Clinical Supervision: Application of the Conceptual to the Empirical
Attachment theory has established itself as applicable to many types of relationships, encompassing caregiver-child, romantic, interpersonal, and psychotherapeutic interactions. This project sought to investigate the application of attachment theory to clinical supervision. Using suggestions put forth in previous work by Watkins and Riggs, this study examined the dyadic interactions inherent in both supervision and attachment. Using the working alliance as determination of the quality of supervision, attachment styles, leader-follower attachment, and attachment-based expectations were explored as predictors for supervisor-trainee dyad outcome in a training clinic for doctoral psychology students. The study design is longitudinal and prospective. Findings indicate the necessity of measurement of supervisory-specific attachment rather than general attachment, the stability of working alliance over time, and the large contribution of the leader-member attachment framework to the understanding of supervisory attachment. Implications include the importance of maintaining hierarchical, evaluative boundaries within supervisory relationship, consistent with a leader-follower dynamic.
Date:
August 2015
Creator:
Wrape, Elizabeth R.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Doctoral Recital: 2015-02-16 - Andy Wright, saxophone
Recital presented at the UNT College of Music Voertman Hall.
Date:
February 16, 2015
Creator:
Wright, Andy
Object Type:
Sound
System:
The UNT Digital Library
Determinants of Citizens’ 311 Use Behaviors: 311 Citizen-initiated Contact, Contact Channel Choice, and Frequent Use
Facing increasingly complex policy issues and diminishing citizen satisfaction with government and service performance, managing the quality of citizen relationship management has become a main challenge for public managers. Solutions to complex policy problems of service performance and low level of citizen participation often must be developed by encouraging citizens to make their voices heard through the various participation mechanisms. Reflecting on this need, the municipal governments in the U.S. have developed centralized customer systems for citizen relationship management. 311 centralized customer system (named 311 in this study) has the functions of citizen-initiated contact, service-coproduction, and transaction, and many local governments launch 311 to maintain or enhance their relationship with the public. Using 311 is an easy and free technically for citizens, but ensuring some degree of citizen engagement and citizens’ 311 use has been challenging for local public managers of municipalities. Despite calls for the importance of 311 in the service and information delivery process, fair treatment and access to use of governmental information, citizen participation, government responsiveness, and citizen satisfaction, to the best of our understanding, no empirical studies explore citizens’ 311 behaviors in the micro and individual level in the field of public administration. This dissertation provides …
Date:
May 2015
Creator:
Wu, Wei-Ning
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Essence of African Americans’ Decisions to Seek Professional Counseling Services: a Phenomenological Study
Mental health disparity is an emerging national concern with evidence suggesting individuals from non-dominant populations are less likely to seek and persist in mental health services compared to their dominant culture peers. In particular, African Americans may underutilize professional counseling services due to factors such as stigma, healthy cultural mistrust, and cultural values. To date, researchers have paid limited attention to ways to break through barriers to mental health equity. The purpose of this phenomenological study was to explore African Americans’ experiences and decision-making seeking professional counseling services. I addressed the following questions: How do African Americans make meaning of their decision to seek counselor services? What considerations are involved in decision- making with African Americans who decide to seek professional counseling services? Participants included 10 African American women who had attended counseling with a licensed professional counselor (LPC) or LPC Intern in the past three years. I identified six emergent themes through adapted classic phenomenological analysis: feelings prior to attending counseling, coping mechanisms utilized prior to counseling, barriers to treatment, motivation to attend counseling, characteristics of counselor, and post counseling experiences. Participants reported increased personal growth, insight, and desire to recommend counseling to others. Findings inform communities about what …
Date:
August 2015
Creator:
Yaites, LaToya D.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Doctoral Recital: 2015-03-24 – Chaul Yang, violin
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
March 24, 2015
Creator:
Yang, Chaul
Object Type:
Sound
System:
The UNT Digital Library
Doctoral Recital: 2015-11-14 – Chaul Yang, violin
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
November 14, 2015
Creator:
Yang, Chaul
Object Type:
Sound
System:
The UNT Digital Library
Doctoral Lecture Recital: 2015-09-06 – Li Zhi Yeoh, horn
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
September 6, 2015
Creator:
Yeoh, Li Zhi
Object Type:
Sound
System:
The UNT Digital Library
Professor Han Xianguang and His Contribution to the Horn World
This dissertation verifies Professor Han, Xianguang as the most significant Chinese horn player and teacher in the twentieth century. He was the first Chinese horn player to win in an international horn competition and the first president of the China Horn Association. He was the premier performer of the only known Chinese horn concerto: Fantasy-Concerto <In Memory>, composed by Professor Shi Yongkang in 1962. Professor Han also served as a judge for many international horn solo and chamber music competitions, and was president of the first (2012), second (2013), and third (2014) CCOM (Central College of Music) International Horn Festivals in Beijing. This dissertation explores Professor Han’s professional and pedagogical contributions to the horn world. These contributions will, in turn, provide an overview of the evolution of the horn and horn playing in China. The horn, historically and musically an instrument of Western Europe, was transported to Asia by many horn players and teachers, with Professor Han the most significant figure in its evolution in China. During Professor Han’s 60-year teaching career, he developed a special pedagogical system. A number of his outstanding horn students, including two sons, eventually became principal hornists in orchestras throughout China, with a few hired …
Date:
December 2015
Creator:
Yeoh, Li Zhi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Doctoral Recital: 2015-11-23 – Kyungjin Yoo, cello
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
November 23, 2015
Creator:
Yoo, Kyungjin
Object Type:
Sound
System:
The UNT Digital Library
Doctoral Recital: 2016 02-04 – Jennifer Youngs, soprano
Doctoral recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
February 4, 2015
Creator:
Youngs, Jennifer (Soprano)
Object Type:
Video
System:
The UNT Digital Library
Doctoral Recital: 2015-03-13 – Yangsun Yu, organ
Recital presented at the UNT College of Music Winspear Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
March 13, 2015
Creator:
Yu, Yangsun
Object Type:
Sound
System:
The UNT Digital Library
Student and Family Perspectives on Gifted and Advanced Academics Participation for African American High School Students
Many students and their families do not understand the impact of students’ involvement in gifted or advanced academics educational programs and their potentially positive effects and challenges. Nationally African American students are underrepresented in gifted and advanced academics courses in high schools; however, African American students and families often do not advocate for their inclusion in these educational pathways. A survey of literature supporting this study of voices of African American families concerning gifted and advanced academics participation focused on (1) the historical underpinnings for equity and excellence for African American and for gifted and advanced academics learners, (2) how the lack of an agreed upon definition of gifted and advanced academics by the professional field might contribute to the problem, and (3) how African American parents made educational decisions for and with their children, especially concerning college. Employing semi-structured interviews and a focus group, this qualitative case study examined how four students from each of three groups, gifted and talented, advanced academics, and neither, and a representative group of their parents perceived these programs and their children’s involvement in them within the framework provided by a single school district. African American families in this study asked for a partnership …
Date:
August 2015
Creator:
Zeske, Karen Marie
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Adaptive Power Management for Autonomic Resource Configuration in Large-scale Computer Systems
In order to run and manage resource-intensive high-performance applications, large-scale computing and storage platforms have been evolving rapidly in various domains in both academia and industry. The energy expenditure consumed to operate and maintain these cloud computing infrastructures is a major factor to influence the overall profit and efficiency for most cloud service providers. Moreover, considering the mitigation of environmental damage from excessive carbon dioxide emission, the amount of power consumed by enterprise-scale data centers should be constrained for protection of the environment.Generally speaking, there exists a trade-off between power consumption and application performance in large-scale computing systems and how to balance these two factors has become an important topic for researchers and engineers in cloud and HPC communities. Therefore, minimizing the power usage while satisfying the Service Level Agreements have become one of the most desirable objectives in cloud computing research and implementation. Since the fundamental feature of the cloud computing platform is hosting workloads with a variety of characteristics in a consolidated and on-demand manner, it is demanding to explore the inherent relationship between power usage and machine configurations. Subsequently, with an understanding of these inherent relationships, researchers are able to develop effective power management policies to optimize …
Date:
August 2015
Creator:
Zhang, Ziming
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Doctoral Recital: 2015-04-02 -- Lejing Zhou, cello
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
April 2, 2015
Creator:
Zhou, Lejing, 1986-
Object Type:
Sound
System:
The UNT Digital Library
Testing the Psychometric Properties of the Online Student Connectedness Survey
The Online Student Connectedness Survey (OSCS) was introduced to the academic community in 2012 as an instrument designed to measure feelings of connectedness between students participating in online degree and certification programs. The purpose of this study was to examine data from the instrument for initial evidence of validity and reliability and to establish a nomological network between the OSCS and similar instruments utilized in the field. The study utilized sequential exploratory factor analysis- confirmatory factor analysis (EFA-CFA) and correlational analysis to assess results of the data. Students enrolled in online courses at higher education institutions located in the United States served as the sample for this study. Three instruments were used during the study. The OSCS was administered first so that the factor structure could be examined for factor validity. Once confirmed, the Classroom Community Scale (CCS) and the Community of Inquiry Scale (COI) served as the instruments to examine nomological validity through correlational analysis of data.This study provided evidence of factor validity and reliability for data from the OSCS. After the initial EFA-CFA, the four-factor structure held, and 16 of the 25 original items remained for nomological testing. Statistically significant correlations were demonstrated between factors contained in the …
Date:
August 2015
Creator:
Zimmerman, Tekeisha
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Sociological Applications of Topic Extraction Techniques: Two Case Studies
Limited research has been conducted with regards to the applicability of topic extraction techniques in Sociology. Addressing the modern methodological opportunities, and responding to the skepticism with regards to the absence of theoretical foundations supporting the use of text analytics, I argue that Latent Semantic Analysis (LSA), complemented by other text analysis techniques and multivariate techniques, can constitute a unique hybrid method that can facilitate the sociological interpretations of web-based textual data. To illustrate the applicability of the hybrid technique, I developed two case studies. My first case study is associated with the Sociology of media. It focuses on the topic extraction and sentiment polarization among partisan texts posted on two major news sites. I find evidence of highly polarized opinions on comments posted on the Huffington Post and the Daily Caller. The highest polarizing topic was associated with a commentator’s reference on Hoodies in the context of the Trayvon Martin’s incident. My findings support contemporary research suggesting that media pundits frequently use tactics of outrage to provoke polarization of public opinion. My second case study contributes to the research domain of the Sociology of knowledge. The hybrid method revealed evidence of topical divides and topical “bridges” in the intellectual …
Date:
August 2015
Creator:
Zougris, Konstantinos
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library