UNT Theses and Dissertations - 452 Matching Results

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Cognitive Performance as a Function of Sleep Disturbance in the Postpartum Period

Description: 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 c… more
Date: August 2015
Creator: Wilkerson, Allison K.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Supporting Mathematics Understanding Through Funds of Knowledge

Description: 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 knowled… more
Date: August 2015
Creator: Williams, Julie J.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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An Evaluation of Matrix Training Approaches for Teaching Compound Labels to Toddlers

Description: Matrix training techniques arrange instruction for stimulus relations that facilitate emergent responding to novel stimulus arrangements, which is a phenomenon known as recombinative generalization. The current study compared two common matrix training approaches, an overlapping (OV) design and a non-overlapping (NOV) design, with respect to arranging relations targeted for training. Two, typically-developing toddlers were taught compound action-object labels in either an OV or NOV matrix tra… more
Date: May 2015
Creator: Wilshire, Tayla C.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Use of Faunal Remains for Identifying Shifts in Pit Structure Function in the Mesa Verde Region: a Case Study From Goodman Point

Description: The archaeofaunal remains left by the Ancestral Puebloan people of Goodman Point Unit provides a valuable, yet underutilized resource into pit structure function. This thesis explores temporal changes in pit structure use and evaluates if a final feast occurred during a kiva decommissioning. The results from zooarchaeological analyses of a pithouse and two great kivas suggest that changes in pit structures at Goodman Point mimic the regional trend toward specialization until late Pueblo III. Cr… more
Date: August 2015
Creator: Winstead, Christy
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Variational Calculations of Positronium Scattering with Hydrogen

Description: 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 formali… more
Date: December 2015
Creator: Woods, Denton
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Attachment Theory Within Clinical Supervision: Application of the Conceptual to the Empirical

Description: 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 superv… more
Date: August 2015
Creator: Wrape, Elizabeth R.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Determinants of Citizens’ 311 Use Behaviors: 311 Citizen-initiated Contact, Contact Channel Choice, and Frequent Use

Description: 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 … more
Date: May 2015
Creator: Wu, Wei-Ning
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Impact of Green Design and Technology on Building Environment

Description: Currently, the public has a strong sense of the need for environment protection and the use of sustainable, or “green,” design in buildings and other civil structures. Since green design elements and technologies are different from traditional design, they probably have impacts on the building environment, such as vibration, lighting, noise, temperature, relative humidity, and overall comfort. Determining these impacts of green design on building environments is the primary objective of this st… more
Date: December 2015
Creator: Xiong, Liang
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Spray Cooling with HFC-134a and HFO-1234yf for Thermal Management of Automotive Power Electronics

Description: This study aims to experimentally investigate the spray cooling characteristics for active two-phase cooling of automotive power electronics. Tests are conducted on a small-scale, closed loop spray cooling system featuring a pressure atomized spray nozzle. Two types of refrigerants, HFC-134a (R-134a) and HFO-1234yf, are selected as the working fluids. The test section (heater), made out of oxygen-free copper, has a 1-cm2 plain, smooth surface prepared following a consistent procedure, and would… more
Date: December 2015
Creator: Yaddanapudi, Satvik Janardhan
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Essence of African Americans’ Decisions to Seek Professional Counseling Services: a Phenomenological Study

Description: 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. … more
Date: August 2015
Creator: Yaites, LaToya D.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Study of Mechanical Performance of Stent Implants Using Theoretical and Numerical Approach

Description: The coronary heart disease kills more than 350,000 persons/year and it costs $108.9 billion for the United States each year, in spite of significant advancements in clinical care and education for public, cardiovascular diseases (CVD) are leading cause of death and disability to the nation. A cardiovascular disease involves mainly heart or blood vessels (arteries, veins and capillaries) or both, and then mainly occurs in selected regions and affects heart, brain, kidney and peripheral arteries.… more
Date: August 2015
Creator: Yang, Hua, (Mechanical engineer)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Professor Han Xianguang and His Contribution to the Horn World

Description: 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 mus… more
Date: December 2015
Creator: Yeoh, Li Zhi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Adult Attachment, Acculturation, and Help-seeking Attitudes of Latino College Students

Description: Based on theoretical reasoning and empirical evidence, the present study examined the unique and shared effects of attachment anxiety, attachment avoidance, and acculturation on attitudes toward seeking professional help among Latino college students. The research participants included 149 bilingual Latino college students from a large, public southwestern university. Results of a multiple regression analysis indicated that attachment avoidance was positively associated with both the recogni… more
Date: May 2015
Creator: Zamudio, Gabriel
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Evaluating Semantic Internalization Among Users of an Online Review Platform

Description: The present study draws on recent sociological literature that argues that the study of cognition and culture can benefit from theories of embodied cognition. The concept of semantic internalization is introduced, which is conceptualized as the ability to perceive and articulate the topics that are of most concern to a community as they are manifested in social discourse. Semantic internalization is partly an application of emotional intelligence in the context of community-level discourse. Sem… more
Date: August 2015
Creator: Zaras, Dimitrios
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Student and Family Perspectives on Gifted and Advanced Academics Participation for African American High School Students

Description: 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 … more
Date: August 2015
Creator: Zeske, Karen Marie
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Synchrotron Radiation X-Ray Diffraction of Nickel-Titanium Shape Memory Alloy Wires During Mechanical Deformation

Description: Shape memory alloys (SMAs) are a new generation material which exhibits unique nonlinear deformations due to a phase transformation which allows it to return to its original shape after removal of stress or a change in temperature. It shows a shape memory effect (martensitic condition) and pseudoelasticity (austenitic condition) properties depends on various heat treatment conditions. The reason for these properties depends on phase transformation through temperature changes or applied stress. … more
Date: December 2015
Creator: Zhang, Baozhuo
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Adaptive Power Management for Autonomic Resource Configuration in Large-scale Computer Systems

Description: 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 amo… more
Date: August 2015
Creator: Zhang, Ziming
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Design fully-integrated dual-band two-stage class-E CMOS PA

Description: In retrospect we can see that from the last century, wireless electronic technology has been in a rapid state of development. With the popularity of wireless communication, the power amplifier demand is rising. In general, magnitude, maximum noise figure, minimum noise figure, efficiency, and output power are important indicators of the amplifier. The IC industry is exploring how to reduce the additional cost and improve the high-frequency performance. Therefore, designing a strong adaptability… more
Date: August 2015
Creator: Zhao, Chao
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Testing the Psychometric Properties of the Online Student Connectedness Survey

Description: 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 fact… more
Date: August 2015
Creator: Zimmerman, Tekeisha
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Sociological Applications of Topic Extraction Techniques: Two Case Studies

Description: 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 interpreta… more
Date: August 2015
Creator: Zougris, Konstantinos
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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