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Dynamic Deformation and Shear Localization in Friction-Stir Processed Al0.3CoCrFeNi and Fe50Mn30Co10Cr10 High-Entropy Alloys

Description: High entropy alloys (HEAs) are a relatively new class of solid solution alloys that contain multiple principal elements to take advantage of their high configurational entropy, sluggish diffusion, lattice distortion, and the cocktail effect. In recent development, work hardening mechanisms known as twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) have been found active in Al0.3CoCrFeNi (molar fraction) and Fe50Mn30Co10Cr10 (at %) HEA compositions. Friction-stir pr… more
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Date: August 2019
Creator: Macdonald, Neil
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Dynamic Measurement of Intraoral Pressure and Sound Pressure With Laryngoscopic Characterization During Oboe Performance

Description: Measurements of intraoral pressure (IOP) and sound pressure level (SPL) were taken of four oboists as they performed two sets of musical exercises: (1) crescendo-decrescendo from pp to ff and back to pp on the pitches D4, G4, C5 and A5, and (2) straight and vibrato performances of the same four pitches at mf. Video images of the vocal tract were also made using flexible fiberoptic nasoendoscopy (FFN). IOP and SPL data were captured in real time by the WinDaq®/Lite software package, with the dB … more
Date: December 2011
Creator: Adduci, Michael Douglas
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Dynamic Precipitation of Second Phase Under Deformed Condition in Mg-nd Based Alloy

Description: Magnesium alloys are the lightweight structural materials with high strength to weigh ratio that permits their application in fuel economy sensitive automobile industries. Among the several flavors of of Mg-alloys, precipitation hardenable Mg-rare earth (RE) based alloys have shown good potential due to their favorable creep resistance within a wide window of operating temperatures ranging from 150°C to 300°C. A key aspect of Mg-RE alloys is the presence of precipitate phases that leads to str… more
Date: December 2013
Creator: Dendge, Nilesh Bajirao
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Dynamic Screening via Intense Laser Radiation and Its Effects on Bulk and Surface Plasma Dispersion Relations

Description: Recent experimentation with excitation of surface plasmons on a gold film in the Kretschmann configuration have shown what appears to be a superconductive effect. Researchers claimed to see the existence of electron pairing during scattering as well as magnetic field repulsion while twisting the polarization of the laser. In an attempt to explain this, they pointed to a combination of electron-electron scattering in external fields as well as dynamic screening via intense laser radiation. Th… more
Date: August 2017
Creator: Lanier, Steven t
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Dynamic WIFI Fingerprinting Indoor Positioning System

Description: A technique is proposed to improve the accuracy of indoor positioning systems based on WIFI radio-frequency signals by using dynamic access points and fingerprints (DAFs). Moreover, an indoor position system that relies solely in DAFs is proposed. The walking pattern of indoor users is classified as dynamic or static for indoor positioning purposes. I demonstrate that the performance of a conventional indoor positioning system that uses static fingerprints can be enhanced by considering dynamic… more
Date: August 2014
Creator: Reyes, Omar Costilla
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Dynamics of Stream Fish Metacommunities in Response to Drought and Re-connectivity

Description: This dissertation investigates the spatio-temporal dynamics of intermittent stream fish metacommunities in response drought-induced fragmentation and re-connectivity using both field and experimental approaches. A detailed field study was conducted in two streams and included pre-drought, drought, and post-drought hydrological periods. Fish assemblages and metacommunity structure responded strongly to changes in hydrological conditions with dramatic declines in species richness and abundance du… more
Date: August 2015
Creator: Driver, Lucas J.
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Eak Tai Ahn's Korea Fantasy: His Life, Historical Context, and Compositional Style

Description: Eak Tai Ahn is not only the first generation of Korean musicians, composers and conductors to have studied Western music and given successful musical performances in Western countries, but also is among the first to introduce the music of Korea to the West utilizing the Western music system. Korea Fantasy is an important work that helped Ahn win international acclaim. Korea Fantasy is an orchestral piece that evolved along with Ahn's unique life experiences shaped by the state of his native cou… more
Date: May 2019
Creator: Baek, Da Mi
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Early and Current Family Environment Among Inpatient Trauma Survivors: Associations with Multi-type Abuse and Sexual Orientation

Description: The present study is an exploratory analysis of associations among sexual orientation, childhood abuse, and characteristics of both early and current family environment in a sample of 80 inpatient trauma survivors. Participants were administered a background information questionnaire, Dissociative Disorders Interview Schedule, the Family Environment Scale and other instruments not analyzed in the current study. Multi-type abuse was significantly associated with low expressiveness and independ… more
Date: May 2013
Creator: Williams, Jennifer S.
Item Type: Refine your search to only Thesis or Dissertation
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Early College High School: Hispanic Students’ Perceptions and Experiences From a Texas Campus

Description: Early college high school (ECHS) is a dual enrollment program that allows high school students to earn college credits while in high school. ECHS was developed with the intention of attracting students to pursue a 4-year college degree, especially students who might not attend college without intervention. The program targets students from low-income families, students who have low academic achievement, and students from minority groups including Hispanics, African Americans, and Native America… more
Date: May 2012
Creator: Brenner, Rose K.
Item Type: Refine your search to only Thesis or Dissertation
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Early Literacy of Young Children in New Immigrant and Native Families in Taiwan: Educational and Socio-political Implications

Description: Because of shifting demographics, the Taiwanese government opened the country to immigrants from Southeast Asia. Foreign-born brides of Taiwanese men have contributed significantly to this trend of new immigration, inspiring fears that their children, inadequately prepared for the literacy requirements of early education, might negatively impact the educational system and society. to better understand the socio-political implications of this cultural shift, the researcher gathered data from one… more
Date: May 2012
Creator: Wang, Hui-Fen
Item Type: Refine your search to only Thesis or Dissertation
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Early Predictors of Early Freshman Year Attrition in Female Hispanic Students

Description: The Texas Hispanic population is projected to grow to 18.8 million, almost tripling its number within the state, in only 30 years. This rapid growth is a concern for Texas higher education because this group has traditionally been under-represented in colleges and universities. Also, according to national, state, and local data, Hispanic students are retained at a lower rate than are other ethnic groups. Because of lower retention rates for Hispanic students and because the majority of Hispan… more
Date: August 2011
Creator: Speed, Heather Faye
Item Type: Refine your search to only Thesis or Dissertation
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Early Second-career Faculty: a Phenomenological Study of Their Transition Into a New Profession

Description: In this phenomenological study I investigated the experiences of early second-career, tenure-track faculty members who entered academe after working in a position outside of higher education for at least five years. The purpose of this study was to learn about experiences and factors that contributed or impeded to the success of second-career faculty members. Eight early second-career faculty members, from a four-year university located in the Dallas Metroplex area, were interviewed. Participan… more
Date: August 2015
Creator: Assaad, Elizabeth A.
Item Type: Refine your search to only Thesis or Dissertation
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Easter Seals North Texas Autism Treatment Program Evaluation: Child Progress

Description: This study reports and evaluates child outcome measures at a non-profit autism treatment program providing applied behavior analysis (ABA) based services to children age 3 to 8. To accomplish this, a review was conducted of available outcome data for a 1 year period. Several categories of outcome measures have been reported in the autism treatment literature (post-intervention educational placement, cognitive status, developmental and achievement status and/or progress, autism symptom reduction… more
Date: May 2010
Creator: Brunson, Lashanna Yvette
Item Type: Refine your search to only Thesis or Dissertation
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Eastern Work Ethic: Structural Validity, Measurement Invariance, and Generational Differences

Description: This present study examined the structural validity of a Chinese version of Multidimensional Work Ethic Profile (MWEP-C), using a large sample of Chinese parents and their young adult children (N = 1047). Confirmatory factor analysis (CFA) was applied to evaluate the model fit of sample data on three competing models using two randomly split stratified subsamples. Measurement invariance for these two generational respondents was checked using differential item functioning (DIF) analysis. The re… more
Date: May 2014
Creator: Chen, Danxia
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Eaten: A Novel

Description: This novel operates on two levels. First, it is a story concerning the fate of a young woman named Raven Adams, who is prompted into journeying westward after witnessing what she believes to be an omen. On another level, however, the novel is intended to be a philosophical questioning of western modes of “science-based” singular conceptualizations of reality, which argue that there is only one “real world” and anyone who deviates from this is “crazy,” “stupid,” or “wrong.” Raven as a character … more
Date: May 2016
Creator: Foster, Natalie
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Eating Disorder Diagnosis and the Female Athlete: From College Sport to Retirement

Description: Female athletes have been established as a high-risk group for disordered eating due to the high prevalence rates of clinical (i.e., 1.9% to 19.9%) and subclinical eating disorders (i.e., 7.1% to 49.2%). To date, only a few studies have examined the long-term stability of eating disorders in collegiate female athletes, a design that will allow examination of change in prevalence rates over time. Additionally, researchers have attempted to identify psychosocial risk factors in the development of… more
Date: August 2018
Creator: Thompson, Alexandra Jo
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Eating from the Tree of Knowledge: The Impact of Visual Culture on the Perception and Construction of Ethnic, Sexual, and Gender Identity

Description: This study explores the way that visual culture and identity creates understanding about how the women in my family interact and teach each other. In the study issues of identity, liminality, border culture, are explored. The study examines how underrepresented groups, such as those represented by Latinas, can enter into and add to the discourses of art education because the women who participated have learned to maneuver through the world, passing what they have learned to one another, from on… more
Date: December 2010
Creator: Peralta, Andrés
Item Type: Refine your search to only Thesis or Dissertation
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Ecological Analysis of Physical Activity and Health-related Quality of Life in Female College Students.

Description: Health-related quality of life (HRQOL) is a comprehensive construct including physical and psychosocial health functioning. Despite significant health benefits of regular physical activity (PA), over 40% of female college students do not meet recommended PA guidelines to improve their health. This study investigated the influences of individual, social, and physical environmental factors on students’ PA and HRQOL. Participants were 235 female university students who completed validated surveys … more
Date: December 2011
Creator: Dunn, Jacqueline
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Ecological Forms of Life: Wittgenstein and Ecolinguistics

Description: The present philosophical literature on philosopher Ludwig Wittgenstein tends to either stagnate by focusing upon issues particular to Wittgenstein's philosophy or expand the boundaries of Wittgenstein's thought to shed light onto other areas of study. One area that has largely been ignored is the realm of environmental philosophy. I prepare the way for a solution to this by first arguing that Wittgenstein's later philosophy of language shows 'proto-ecolinguistic' concerns, sharing much in co… more
Date: December 2012
Creator: Sarratt, Nicholas M.
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Ecological Significance and Underlying Mechanisms of Body Size Differentiation in White-tailed Deer

Description: Body size varies according to nutritional availability, which is of ecological and evolutionary relevance. The purpose of this study is to test the hypothesis that differences in adult body size are realized by increasing juvenile growth rate for white-tailed deer (Odocoileus virginianus). Harvest records are used to construct growth rate estimates by empirical nonlinear curve fitting. Results are compared to those of previous models that include additional parameters. The rate of growth increa… more
Date: May 2012
Creator: Barr, Brannon
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Ecological Sustainability and Peace: The Effect of Ecological Sustainability on Interstate and Intrastate Environmental Conflict

Description: This study examines the relationship between ecological sustainability and violent conflict at both the interstate and intrastate level. In particular, this study explores the effect of ecological sustainability of a society on the initiation and the occurrence of violent conflict. By developing a theory, which is named "Eco-peace," this study hypothesizes that the more ecologically sustainable the socioeconomic system of societies, the less likely the society is to initiate interstate conflict… more
Date: August 2010
Creator: Yoon, Jong-Han
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An Ecological Understanding of Teacher Quality in Early Childhood Programs: Implications and Recommendations

Description: This research examined whether or not relationships exist between preschool teacher quality and parent involvement as indicated by the Hoover-Dempsey and Sandler Model of Parent Involvement Survey. Additionally, the study also considered family income and child membership in special education as predictors of parent involvement. The survey instruments included the Early Childhood Environmental Rating Scale, Revised (ECERS-R) and the Hoover-Dempsey and Sandler Parent Involvement Survey. A total … more
Date: May 2011
Creator: Macias-Brown, Armandina A.
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The Ecology and Paleobiogeography of Freshwater Mussels (Family: Unionidae) from Selected River Basins in Texas

Description: This dissertation has two overall objectives: first, to demonstrate the utility of paleozoological data for ongoing and future mussel-conservation efforts in Texas and second, to evaluate whether simple measures of habitat (e.g., water depth, velocity and particle size) are important for demonstrating the within-habitat spatial separation of mussels. Although these topics may seem disparate, both are important for increasing our understanding of unionid ecology and biogeography. Chapters 1 th… more
Date: May 2011
Creator: Randklev, Charles R.
Item Type: Refine your search to only Thesis or Dissertation
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Ecology and Recolonization of Benthic Macroinvertebrates in a Groundwater-dependent Stream in North Central Texas During a Supra-seasonal Drought

Description: Extreme climatic events such as droughts are known to eliminate aquatic biota and alter community structure and function. Perennial headwater springs provide important drought refugia to benthic macroinvertebrates and an important source of colonists via drift or aerial adults to intermittent streams post-drought. During a supra-seasonal drought in North-central Texas summer and fall 2006, benthic macroinvertebrates from persistent groundwater-dependent macrohabitats of varying hydrological con… more
Date: May 2012
Creator: Burk, Rosemary A.
Item Type: Refine your search to only Thesis or Dissertation
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