199 Matching Results

Results open in a new window/tab.

Partnership for Building Institutional/National Capacity: Addis Ababa University and University of North Texas Initiatives

Presentation for the 2015 International Conference on Information Communication Technologies (ICT) for Development, Education, and Training. This presentation discusses partnerships for building institutional/national capacity and initiatives at Addis Ababa University and the University of North Texas.
Date: May 2015
Creator: Abate, Solomon Teferra & Alemneh, Daniel Gelaw
Object Type: Presentation
System: The UNT Digital Library
"Miss Kathy" (open access)

"Miss Kathy"

Miss Kathy is a documentary film that tells the story of Kathy Griffin-Grinan, a lead recovery coach for prostitution and human trafficking with the Harris County Sheriff’s Office. Her non-profit organization —We’ve Been There, Done That – works in conjunction with law-enforcement to offer the survivors of prostitution a chance at rehabilitation. With endless enthusiasm, she mentors survivors as they struggle to escape a destructive lifestyle. This film also explores the relationship between human trafficking and prostitution, while addressing issues of victimization and exploitation.
Date: May 2015
Creator: Alexander, Jeffrey, 1982-
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Co-Creating Value in Video Games: The Impact of Gender Identity and Motivations on Video Game Engagement and Purchase Intentions (open access)

Co-Creating Value in Video Games: The Impact of Gender Identity and Motivations on Video Game Engagement and Purchase Intentions

When games were first developed for in-home use, they were primarily targeted almost exclusively at children and males. However, today’s marketplace manifests a more diverse population plays Internet-enabled games that can be played virtually anywhere. The average gamer is now 30 years old. Many gamers, obviously, are much older. Yet more strikingly, and more germane to this study’s purpose, 47% of the U.S. gamer population is female, as compared to 40% in 2010. Despite these trends the gaming industry remains a male-dominated culture. The marketer’s job is to facilitate game engagement and to motivate gamers to play. The notion of “engagement” is not new in business. The term was developed in the last decade. Many studies were devoted to understand, explain, and define the term. It suggests that within interactive, dynamic business environments, consumer engagement (CE) represents a strategic position that companies can use to enhance their sales growth, competitive advantage, and profitability. Moreover, there are three levels of engagement in any experiential consumption (i.e., playing video game): presence, flow, and psychological absorption. The findings of this study affirm that consumer engagement, including presence, flow and psychological absorption are explanatory factors that impact gamer’s purchase intentions. Our results show that …
Date: May 2015
Creator: Alhidari, Abdullah
Object Type: Thesis or Dissertation
System: The UNT Digital Library
An Analysis of Du cristal…à la fumée by Kaija Saariaho and Axiom Unearthed, Original Composition (open access)

An Analysis of Du cristal…à la fumée by Kaija Saariaho and Axiom Unearthed, Original Composition

Beginning in the 1970s, and aided by the advancement and an increased prevalence of computers, spectral music emerged as an important development in twentieth century music. Spectral composers, as exemplified by Gérard Grisey and Tristan Murail, took the harmonic spectra of sounds as the fundamental materials of composition. The resulting music placed an emphasis on texture and gradually evolving forms. The generation of composers immediately following the spectralists assimilated their techniques into distinct and varying styles. Finnish composer Kaija Saariaho uses spectral techniques to create an aesthetic that generates form and progression from a sound/noise axis. In her piece Du cristal…à la fumée, a number of pendulum and half-pendulum gestures build up texture and form. The accompanying original composition Axiom Unearthed employs similar pendulum gestures and uses spectral techniques to generate melody and harmony in an aesthetic divergent from traditional spectral pieces.
Date: May 2015
Creator: Allen, John Clay
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Nuestra Voz De North Texas (Fort Worth, Tex.), Vol. 2, No. 18, Ed. 1, May 2015 (open access)

Nuestra Voz De North Texas (Fort Worth, Tex.), Vol. 2, No. 18, Ed. 1, May 2015

Monthly newspaper providing news and information to the Tarrant, Dallas, and Denton County Latino communities along with advertising.
Date: May 2015
Creator: Alvarado, Felix
Object Type: Newspaper
System: The Portal to Texas History
The Effects of a Psychosocial Environment on College Women’s Exercise Regulations and Social Physique Anxiety (open access)

The Effects of a Psychosocial Environment on College Women’s Exercise Regulations and Social Physique Anxiety

A positive psychosocial intervention comprised of high autonomy support, task-involvement, and caring was implemented in physical activity classes to examine its effects on college women’s basic psychological needs (i.e. autonomy, competence, relatedness), exercise regulations (i.e. external, introjected, identified, integrated, intrinsic) and social physique anxiety (SPA). We hypothesized that at the end of the semester, participants in the intervention group (N = 73) would report greater need satisfaction, more self-determined regulations and less SPA than participants in the non-intervention group (N = 60). At T1 and T2, both the intervention and non-intervention participants reported “agreeing” with experiencing an autonomy supportive, task-involving, and caring environment. Furthermore, both groups at T1 and T2 reported moderate SPA. No significant group differences were found at T1. At T2, significant group differences were observed in the intervention and non-intervention groups’ report of external regulation and intrinsic regulation. The results suggests that group exercise instructors are capable of creating a positive psychosocial environment to enhance students’ intrinsic motivation.
Date: May 2015
Creator: Alvarez, Ana
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Southwest Retort, Volume 67, Number 9, May 2015 (open access)

Southwest Retort, Volume 67, Number 9, May 2015

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.
Date: May 2015
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
A Comparative Analysis of State Funds on Student Achievement of Economically Disadvantaged Elementary Schools in Independent School Districts and Charter Schools in the State of Texas (open access)

A Comparative Analysis of State Funds on Student Achievement of Economically Disadvantaged Elementary Schools in Independent School Districts and Charter Schools in the State of Texas

The purpose of this study was to evaluate the relationship between the instructional outcomes in the independent school districts and charter schools in relation to the expenditure of public funds for instruction and total operating expenditures from the general fund. The study considered Texas elementary charter schools and independent school districts, whose school populations were identified as having greater than or equal to 50% of economically disadvantaged students, according to the Texas Academic Excellence Indicator System (AEIS). The study made use of multiple regression and was an ex post facto cross-sectional analysis utilizing production function theory. The study’s outcomes reported the difference in student achievement between elementary schools in independent public school districts and charter schools were small to negligible for math and reading achievement. The study also reported, there is no statistically significant difference in per pupil expenditure of public funds between elementary schools in independent public school districts and charter schools. Furthermore, there is no statistically significant relationship between student achievement and per pupil expenditure of public funds on elementary schools in independent public school districts and charter schools.
Date: May 2015
Creator: Applewhite, Gary
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Space and Spectrum Engineered High Frequency Components and Circuits (open access)

Space and Spectrum Engineered High Frequency Components and Circuits

With the increasing demand on wireless and portable devices, the radio frequency front end blocks are required to feature properties such as wideband, high frequency, multiple operating frequencies, low cost and compact size. However, the current radio frequency system blocks are designed by combining several individual frequency band blocks into one functional block, which increase the cost and size of devices. To address these issues, it is important to develop novel approaches to further advance the current design methodologies in both space and spectrum domains. In recent years, the concept of artificial materials has been proposed and studied intensively in RF/Microwave, Terahertz, and optical frequency range. It is a combination of conventional materials such as air, wood, metal and plastic. It can achieve the material properties that have not been found in nature. Therefore, the artificial material (i.e. meta-materials) provides design freedoms to control both the spectrum performance and geometrical structures of radio frequency front end blocks and other high frequency systems. In this dissertation, several artificial materials are proposed and designed by different methods, and their applications to different high frequency components and circuits are studied. First, quasi-conformal mapping (QCM) method is applied to design plasmonic wave-adapters and couplers …
Date: May 2015
Creator: Arigong, Bayaner
Object Type: Thesis or Dissertation
System: The UNT Digital Library

National Plan for Access to U.S. Government Information: A user-centric service approach to permanent public access

Presentation for the 2015 Open Access Symposium discussing a national plan for access to U.S. government information and a user-centric service approach to permanent public access.
Date: May 18, 2015
Creator: Baish, Mary Alice
Object Type: Presentation
System: The UNT Digital Library
Levanten La Mano Si Me Entienden: Receptive Bilinguals’ Linguistic and Cultural Perceptions in Secondary Spanish Classes (open access)

Levanten La Mano Si Me Entienden: Receptive Bilinguals’ Linguistic and Cultural Perceptions in Secondary Spanish Classes

Receptive bilinguals have been in a dilemma of knowing just enough Spanish to write and aurally comprehend the curriculum at the beginning-intermediate levels of a Spanish language course. This dichotomy in classrooms with mixed-ability learners has created a need to reconsider placement and pedagogical structures tailored for these students in foreign language courses. Thus, this descriptive study examined the perceptions of receptive bilinguals, drawn from two secondary Spanish courses regarding receptive bilinguals’ language use, personal Spanish language abilities and confidence, personal beliefs about the language, and contentment with the course. For this study, 31 participants were selected from two public high schools in a suburb of a large metropolitan area in north Texas. Two surveys, a listening assessment and an online questionnaire, were administered at the end of the academic year. The Likert questionnaire items were analyzed using SPSS software, while open-ended questions were coded for recurrent themes. Analyses revealed four major findings. First, with regard to influence on language use, participants’ grandparents created the most interaction with the Spanish language when compared with the other family groups. In addition, Spanish influence through television, literature, radio, and music contributed to students’ early childhood Spanish learning. Second, as to language preference, …
Date: May 2015
Creator: Baker, Adelita Gonzales
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Application of Cyclic Polarization of Aluminum 3003 Used in All-Aluminum Microchannel Heat Exchangers (open access)

Application of Cyclic Polarization of Aluminum 3003 Used in All-Aluminum Microchannel Heat Exchangers

All-aluminum microchannel heat exchangers are designed to significantly reduce refrigerant charge requirements, weight, reduced brazed joints, and decreased potential for leakage by increasing reliability. Al 3003 alloy is corrosion resistant and can be formed, welded, and brazed but the issue with all-aluminum heat exchangers is localized corrosion (pitting) in corrosive environments. Currently, there is no universally accepted corrosion test that all coil manufacturers use to characterize their products. Electrochemical testing method of cyclic polarization was employed in this investigation and relevant parameters including electrolyte corrosive agent and its concentration, electrolyte pH, and applied potential scan rate was varied to find an optimal set of parameters. Results of cyclic polarization of Al 3003 in electrolytes containing various concentrations of NaCl were compared with those of the tests in Sea Water Acidified Accelerated Test (SWAAT) electrolyte and it is shown the SWAAT electrolyte (4.2% sea salt acidified to pH of 2.9) is by far stronger (in terms of corrosivity) than typical 3.5% NaCl solution used in most corrosion testing. Corrosion rates (g/m2yr) of Al 3003 measured in this investigation were comparable to those provided by ISO 9223 standard corresponding to C1 through CX categories. Duration of cyclic polarization test is much shorter …
Date: May 2015
Creator: Barnes, Javier
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Characteristics of Primary Cilia and Centrosomes in Neuronal and Glial Lineages of the Adult Brain (open access)

Characteristics of Primary Cilia and Centrosomes in Neuronal and Glial Lineages of the Adult Brain

Primary cilia are sensory organelles that are important for initiating cell division in the brain, especially through sonic hedgehog (Shh) signaling. Several lines of evidence suggest that the mitogenic effect of Shh requires primary cilia. Proliferation initiated by Shh signaling plays key roles in brain development, in neurogenesis in the adult hippocampus, and in the generation of glial cells in response to cortical injury. In spite of the likely involvement of cilia in these events, little is known about their characteristics. Centrosomes, which are associated with primary cilia, also have multiple influences on the cell cycle, and they are important in assembling microtubules for the maintenance of the cell’s cytoskeleton and cilia. The cilia of terminally differentiated neurons have been previously examined with respect to length, incidence, and receptors present. However, almost nothing is known about primary cilia in stem cells, progenitors, or differentiated glial cells. Moreover, it is not known how the properties of cilia and centrosomes may vary with cell cycle or proliferative potential, in brain or other tissues. This dissertation focuses first on neurogenesis in the hippocampal subgranular zone (SGZ). The SGZ is one of the few brain regions in mammals that gives rise to a substantial …
Date: May 2015
Creator: Bhattarai, Samip Ram
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Through an Open Window (open access)

Through an Open Window

The poems in this collection are elegiac; celebrations of losses and failures, tributes to the daily doldrums that are at the center of human experience. They threaten to expose the uncertainty that exists and refuses to exist in our everyday lives. They explore the otherness associated with the individual and often turn to the universal formulas of music and physics to make order of the world around them. Often times the Speaker finds that the seeming chaos manifests within her already orderly life, the daily routines of work and family. Poetic magic, so to speak, weds this ordered chaos to the laws of nature and its routines, especially birds, which makes a recurrent appearance throughout the manuscript.
Date: May 2015
Creator: Bingham, Christie
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Open Law and Open Access

Presentation for the 2015 Open Access Symposium discussing open access to open law and the Uniform Electronic Legal Material Act.
Date: May 18, 2015
Creator: Bintliff, Barbara, 1953-
Object Type: Presentation
System: The UNT Digital Library
The Modern Trombone in the African American Church: Shout Bands and the African American Preacher in the United House of Prayer (open access)

The Modern Trombone in the African American Church: Shout Bands and the African American Preacher in the United House of Prayer

The United House of Prayer was established by Marcelino Manuel da Graça (1881-1960), who is also known as Charles Manuel “Sweet Daddy” Grace, or “Daddy” Grace. He founded and developed the use of the shout bands which are charismatic gospel trombone ensembles within this church. This study explores the importance of shout bands and examines them from multiple perspectives focusing in particular on worship practices. Additionally, it examines rhythmic elements as the most important characteristic of music performed by these unique ensembles, rhythms that reflect the preacher’s personal timing and inflections that the trombones then imitate. The approach used here supports a deeper understanding of the United House of Prayer and of the trombone in church services of this denomination. Indeed, it ultimately establishes the trombone’s role in the United House of Prayer.
Date: May 2015
Creator: Block, Tyrone J.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Nanohybrids Based on Solid and Foam Polyurethanes (open access)

Nanohybrids Based on Solid and Foam Polyurethanes

Polymer nanocomposites are a going part of Materials Science and Engineering. These new composite materials exhibit dimensional and thermal stability of inorganic materials and toughness and dielectric properties of polymers. Development of nanocomposites become an important approach to create high-performance composite materials. In this study silica, fly ash, silica nanotubes and carbon black particles have been added to modify polyurethane foam and thermoplastic polyurethanes. It has been found that the addition of silica can diminish the size of foam bubbles, resulting in an increased stiffness of the material, increase of the compressive strength, and greater resistance to deformation. However, the uniformity of bubbles is reduced, resulting in increased friction of the material. Fly ash added to the foam can make bubbles smaller and improve uniformity of cells. Therefore, the material stiffness and compressive strength, resistance to deformation, and has little impact on the dynamic friction of the material. Adding nanotubes make bubble size unequal, and the arrangement of the bubble uneven, resulting in decreased strength of the material, while the friction increases. After the addition of carbon black to the polyurethane foam, due to the special surface structure of the carbon black, the foam generates more bubbles during the foaming …
Date: May 2015
Creator: Bo, Chong
Object Type: Thesis or Dissertation
System: The UNT Digital Library
An Assessment of Uncommon Titanium Binary Systems: Ti-Zn, Ti-Cu, and  Ti-Sb (open access)

An Assessment of Uncommon Titanium Binary Systems: Ti-Zn, Ti-Cu, and Ti-Sb

The current study focuses on phase stability and evolution in the titanium-zinc titanium-copper and titanium-antimony systems. The study utilized the Laser Engineering Net Shaping (LENS™) processing technique to deposit compositionally graded samples of three binary system in order to allow the assessment of phase stability and evolution as a function of composition and temperature the material is subjected to. Through LENS™ processing it was possible to create graded samples from Ti-xSb (up to 13wt%) and Ti-xCu (up to 16wt%). The LENS™ deposited gradient were solutionized, and step quenched to specific aging temperature, and the resulting microstructures and phase were characterized utilizing XRD, EDS, SEM, FIB and TEM. The Ti-Zn system proved incapable of being LENS™ deposited due to the low vaporization temperature of Zn; however, a novel processing approach was developed to drip liquid Zn onto Ti powder at temperatures above β transus temperature of Ti (882 ◦C) and below the vaporization temperature of Zn (907 ◦C). The product of this processing technique was characterized in a similar way as the graded LENS™ depositions. From measurements performed on Ti-Sb it seems that Sb could be a potential α stabilizer in Ti due to the presence of a mostly homogeneous α …
Date: May 2015
Creator: Brice, David
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Down and Out: a Novel (open access)

Down and Out: a Novel

A creative dissertation consisting of two parts: a novel and a critical preface. The critical preface, titled “Novel without Falsehood” deals directly with David Shields’s Reality Hunger, touching on issues of reality as it pertains to truth, writing, fiction, and contemporary culture. The novel is entitled Down and Out and follows the fortunes of a small town in Arkansas before, during, and after its sole source of employment ceases to exist.
Date: May 2015
Creator: Briseño, J. Andrew
Object Type: Thesis or Dissertation
System: The UNT Digital Library
SEM Predicting Success of Student Global Software Development Teams (open access)

SEM Predicting Success of Student Global Software Development Teams

The extensive use of global teams to develop software has prompted researchers to investigate various factors that can enhance a team’s performance. While a significant body of research exists on global software teams, previous research has not fully explored the interrelationships and collective impact of various factors on team performance. This study explored a model that added the characteristics of a team’s culture, ability, communication frequencies, response rates, and linguistic categories to a central framework of team performance. Data was collected from two student software development projects that occurred between teams located in the United States, Panama, and Turkey. The data was obtained through online surveys and recorded postings of team activities that occurred throughout the global software development projects. Partial least squares path modeling (PLS-PM) was chosen as the analytic technique to test the model and identify the most influential factors. Individual factors associated with response rates and linguistic characteristics proved to significantly affect a team’s activity related to grade on the project, group cohesion, and the number of messages received and sent. Moreover, an examination of possible latent homogeneous segments in the model supported the existence of differences among groups based on leadership style. Teams with assigned leaders …
Date: May 2015
Creator: Brooks, Ian Robert
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Relationship of Peer Leadership Employment to Academic Outcomes in Texas Institutions of Higher Education (open access)

The Relationship of Peer Leadership Employment to Academic Outcomes in Texas Institutions of Higher Education

The purpose of this quantitative study was to examine the relationship of participation and involvement in an undergraduate student success program to academic success and persistence among students in three programs sponsored by the Texas Higher Education Coordinating Board (THECB): the G-Force Collegiate Work-Study Mentorship Program, the Advancement Via Individual Determination (AVID) for Higher Education (AHE) program, and the THECB work-study program. The sample was identified using data from the THECB during the 2009-2013 academic years. Compared to THECB work-study students, significantly more AHE and G-Force students persisted toward graduation while engaged in the program (p < .001). ANOVA indicated that AHE students had a higher average GPA compared to G-Force and THECB work-study students, controlled for gender, race/ethnicity, pre-program GPA, and length of time in the position. Regression analyses found no statistically significant relationship between program associations and persistence towards graduation or GPA. Results suggest that although participation in a peer leadership programs such as AHE and G-Force encourage greater academic achievement and persistence, there is no direct relation to the achievement of these outcome variables. Implications of the study suggest the need for a deeper analysis into elements of peer leadership programs that contribute to student success, an …
Date: May 2015
Creator: Buggs, Michelle L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Funds of Knowledge and Early Literacy: A Case Study (open access)

Funds of Knowledge and Early Literacy: A Case Study

When teachers are charged with educating students that are racially, culturally, or economically different from them, they may have little information on the culture and type of family involvement of their students. This lack of information contributes to perceptions of working-class families as socially disorganized and intellectually deficient. However, research embodying the theoretical framework funds of knowledge (FoK) attempts to counter deficient models through its assertion that all families possess extensive bodies of knowledge that have developed through social, historical, political, and economic contexts. The primary purpose of this study was to carefully examine Hispanic parents’ support of young children’s early literacy development in the home. The knowledge gleaned from an initial study of home support, by spending time in the home of a Hispanic family provided an avenue for action research in the classroom. A second purpose was to determine if the introduction of FoK ways of learning, when applied in the classroom, had an effect on early literacy skills. In addition, I maintained a journal that chronicled my experiences and led to an autoethnographic study of myself as a transforming white, female, prekindergarten teacher. The results indicated that the family possessed extensive FoK developed through historical, cultural, educational, …
Date: May 2015
Creator: Butler, Ami R.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
South Texas Catholic (Corpus Christi, Tex.), Vol. 50, No. 5, Ed. 1, May 2015 (open access)

South Texas Catholic (Corpus Christi, Tex.), Vol. 50, No. 5, Ed. 1, May 2015

Monthly newspaper from Corpus Christi, Texas published by the Diocese of Corpus Christi that includes news of interest to Diocese members along with advertising.
Date: May 2015
Creator: Cardenas, Alfredo E.
Object Type: Newspaper
System: The Portal to Texas History
To Weigh or Not to Weigh? Relation to Disordered Eating Attitudes and Behaviors Amongst Female Collegiate Athletes (open access)

To Weigh or Not to Weigh? Relation to Disordered Eating Attitudes and Behaviors Amongst Female Collegiate Athletes

Collegiate and elite female athletes have been identified as a subpopulation at heightened risk for disordered eating and pathogenic weight management practices. It was hypothesized that this increases risk may be related to sport specific pressures (such as team conducted weigh-ins), or the use and frequency of self-weighing. It appears that mandatory, team conducted weigh-ins are not salient to female athletes in regards to experiencing internalization, body image concerns, dietary restraint, negative affect, and bulimic symptomatology. Results, however, indicate that frequency of engagement in self-weighing may be influential in the engagement of disordered eating symptoms. Specifically, athletes who weighed themselves three or more times per week reported significantly more internalization of general societal ideals and athletic body ideals. For body image concerns, athletes who weighed three or more times per week reported being more concerned with their body size/shape than all others. With respect to dietary behaviors, athletes who weighed themselves three or more times per week reported engaging in significantly more caloric restriction than did those who weighed less frequently. For negative affect, the athletes who weighed themselves three or more times per week reported significantly higher levels of both anger and guilt. Finally for bulimic symptomatology, athletes who …
Date: May 2015
Creator: Carrigan, Kayla
Object Type: Thesis or Dissertation
System: The UNT Digital Library