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A Preliminary Controller Design for Drone Carried Directional Communication System
In this thesis, we conduct a preliminary study on the controller design for directional antenna devices carried by drones. The goal of the control system is to ensure the best alignment between two directional antennas so as to enhance the performance of air-to-air communication between the drones. The control system at the current stage relies on the information received from GPS devices. The control system includes two loops: velocity loop and position loop to suppress wind disturbances and to assure the alignment of two directional antennae. The simulation and animation of directional antennae alignment control for two-randomly moving drones was developed using SIMULINK. To facilitate RSSI-based antenna alignment control to be conducted in the future work, a study on initial scanning techniques is also included at the end of this thesis.
Date:
August 2015
Creator:
AL-Emrani, Firas
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
General Counsel Prominence and Corporate Tax Policy
This article examines the role of the general counsel (GC) in corporate tax policy.
Date:
August 2015
Creator:
Abernathy, John L.; Kubick, Tom & Masli, Adi
Object Type:
Article
System:
The UNT Digital Library
The Black Churches in Wheelock, Robertson County, Texas
History of churches that served the African-American community in Wheelock, Texas, including: Triumph/Trump Baptist Church, Old New Hope Baptist Church, Pleasant Grove Baptist Church, Sharon Chapel African Methodist Church, New Hope Missionary Baptist Church, and the Church of God in Christ.
Date:
August 2015
Creator:
Adams, Estelle Mitchell
Object Type:
Text
System:
The Portal to Texas History
Time Series Data Analysis of Single Subject Experimental Designs Using Bayesian Estimation
This study presents a set of data analysis approaches for single subject designs (SSDs). The primary purpose is to establish a series of statistical models to supplement visual analysis in single subject research using Bayesian estimation. Linear modeling approach has been used to study level and trend changes. I propose an alternate approach that treats the phase change-point between the baseline and intervention conditions as an unknown parameter. Similar to some existing approaches, the models take into account changes in slopes and intercepts in the presence of serial dependency. The Bayesian procedure used to estimate the parameters and analyze the data is described. Researchers use a variety of statistical analysis methods to analyze different single subject research designs. This dissertation presents a series of statistical models to model data from various conditions: the baseline phase, A-B design, A-B-A-B design, multiple baseline design, alternating treatments design, and changing criterion design. The change-point evaluation method can provide additional confirmation of causal effect of the treatment on target behavior. Software codes are provided as supplemental materials in the appendices. The applicability for the analyses is demonstrated using five examples from the SSD literature.
Date:
August 2015
Creator:
Aerts, Xing Qin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Interrelated Histories, Practices, and Forms of Communication: Using Arabic Calligraphy to Learn Arabic Typography
In this self-study inquiry, I studied my graphic design practice in a professional setting, focusing on my Arabic typographic skills and knowledge. My roles as researcher and design educator indivisibly intertwined throughout this research. I worked to understand the value of calligraphy in art and design education, highlighting its power as an art form while also emphasizing its pedagogical potentials. I utilized two theoretical approaches suited to investigating and understanding the Arabic letters as text and image, Ibn Arabi’s science of letters, or 'ilm al-hurûf, and semiotics. I applied my theoretical framework to three distinctive artworks to investigate their uses of the Arabic letters, contemplating their roles in modern and contemporary Arab art. Essential to my research was learning Arabic calligraphy through two approaches: 1) I attended a calligraphy workshop, and 2) I conducted three self-study experimentations. I analyzed my experience through visual representations, commentary, and narrative inquiry to assess Arabic calligraphy’s significance for graphic design education. As such, my experimentations confirmed Arabic calligraphy’s aesthetic and educational value. I employed my findings to create a contemporary Arabic typography curriculum suitable for university-level students. This curriculum is built on learning theories such as visual culture analysis, semiotics, constructivist theory, play principles, …
Date:
August 2015
Creator:
Al-Ansari, Banan Ahmed
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Therapist (Dis)Continuity, Therapeutic Relationship, and (Premature) Termination in a Psychology Training Clinic
Premature termination is a substantial problem with significant adverse effects for clients, therapists, and treatment organizations. Unfortunately, it is also a relatively common phenomenon within mental healthcare settings. Across varied mental healthcare settings, rates of premature termination have reportedly ranged from 19.7 % to 40 %. Perhaps not surprisingly, the rate of premature termination in training clinics is substantially higher than in community mental health settings and private practice, with 75 to 80 % of clients ending treatment services prematurely. The purpose of this study was to explore the combined effect of intake therapist continuity or discontinuity, and quality of the therapeutic relationship on premature termination. Intake therapist continuity, measures of working alliance, and termination outcome from 524 clients at the University of North Texas Psychology Clinic were utilized for adults receiving individual therapy services between August 2008 and August 2013. Results of the study suggest intake therapist continuity did not predict subjective termination status (X2(2, n = 524) = 1.61, p = 0.45), nor did it predict change in symptomology status (X2(3, n = 453) = 1.14, p = 0.77). Additionally, working alliance predicted subjective termination status (X2(6, n = 212) = 21.17, p < 0.01), but not change …
Date:
August 2015
Creator:
Al-Jabari, Rawya M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
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 …
Date:
August 2015
Creator:
Alexis, Naudin
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Oral History Interview with Don Alfred, August 1, 2015
The National Museum of the Pacific War presents an interview with Don Alfred. Alfred joined the Army Air Forces in 1942. He was stationed on Tinian Island, and served as a B-29 navigator with the 6th Bombardment Group. He flew 27 missions over Japan.
Date:
August 1, 2015
Creator:
Alfred, Don
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Don Alfred, August 1, 2015
The National Museum of the Pacific War presents an interview with Don Alfred. Alfred joined the Army Air Forces in 1942. He was stationed on Tinian Island, and served as a B-29 navigator with the 6th Bombardment Group. He flew 27 missions over Japan.
Date:
August 1, 2015
Creator:
Alfred, Don
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Donald Andrew, August 30, 2015
The National Museum of the Pacific War presents an interview with Donald Andrew Alfred. Alfred was born on 28 July 1925, graduated high school in 1942, and joined the Army Air Forces in 1943 at the age of seventeen. He served as a navigator with the 40th Bomb Squadron, 6th Bomb Group, 313th Bombardment Wing, 20th Air Force, aboard the B-29, called Dearly Beloved. In late 1944, they were stationed on Tinian and flew 27 missions over Japan, including Iwo Jima and Tokyo. After the war ended, they dropped supplies to American troops in Japan. Alfred returned to the US and received his discharge on 4 January 1946.
Date:
August 30, 2015
Creator:
Alfred, Donald
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Donald Andrew, August 30, 2015
The National Museum of the Pacific War presents an interview with Donald Andrew Alfred. Alfred was born on 28 July 1925, graduated high school in 1942, and joined the Army Air Forces in 1943 at the age of seventeen. He served as a navigator with the 40th Bomb Squadron, 6th Bomb Group, 313th Bombardment Wing, 20th Air Force, aboard the B-29, called Dearly Beloved. In late 1944, they were stationed on Tinian and flew 27 missions over Japan, including Iwo Jima and Tokyo. After the war ended, they dropped supplies to American troops in Japan. Alfred returned to the US and received his discharge on 4 January 1946.
Date:
August 30, 2015
Creator:
Alfred, Donald
Object Type:
Text
System:
The Portal to Texas History
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 …
Date:
August 2015
Creator:
Alhumaid, Saleh Mohammad
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Nuestra Voz De North Texas (Fort Worth, Tex.), Vol. 2, No. 21, Ed. 1, August 2015
Monthly newspaper providing news and information to the Tarrant, Dallas, and Denton County Latino communities along with advertising.
Date:
August 2015
Creator:
Alvarado, Felix
Object Type:
Newspaper
System:
The Portal to Texas History
Health-related Quality of Life and Social Engagement in Assisted Living Facilities
This research project aims to clarify the factors that impact successful aging in Assisted Living facilities (ALFs) in Denton County, Texas. We hypothesize that social disengagement decreases physical and mental components of quality of life. This exploratory research project employed standardized questionnaires to assess residents in the following domains; HRQOL, social engagement status, level of cognition, depression, and the level of functioning. This study collected data from 75 participants living in five ALFs. The average of Physical Component Scale (PCS) and Mental Component Scale (MCS) was 35.33, and 53.62 respectively. None of the participants had five or more social contacts out of facilities, and two-third of them had two or less social contacts. On average, those participants who were more socially engaged had higher score of MCS compared with disengaged counterparts. The level of physical function significantly affects social engagement, when people with more disabilities are more likely to be socially disengaged. Social engagement and depression significantly impact MCS, when depression is a mediating factor between social engagement and mental component of quality of life. Considering the expansion in aging population in the United States within the next three decades, the demand for high quality long-term care will skyrocket consequently. …
Date:
August 2015
Creator:
Amini, Reza
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Studies to Evaluate Achievement of Freshwater Inflow Standards and Ecological Response Final Report
Report on freshwater inflow standards and ecological responses on the Colorado and Lavaca Rivers and Matagorda and Lavaca Bays.
Date:
August 2015
Creator:
Anchor QEA, LLC
Object Type:
Report
System:
The Portal to Texas History
Exploring Teachers’ Constructivist Beliefs Using Talis 2013: Approaches to Training and Development
The changing landscape of demographics, technology, and diversity in the learning environment is challenging schools around the world to rethink their approaches to the implementation of high-quality teaching practices. Classroom practices are becoming more complex because educators have to ensure that their students are well-equipped with 21st century skills (e.g., Darling-Hammond, 2010; Dede, 2010; Griffin, McGaw, & Care, 2012). Educators, curriculum developers, and school administrators need to be more than experts in pedagogy. They are now required to keep up with current ideas, innovative instructional practices, and the results of a variety of educational reform efforts. Believing that teachers’ beliefs are the most important psychological construct with regard to instructional practices (Pajares, 1992) and that teachers’ beliefs are related to their choice of classroom practices and, ultimately, the students’ performance (Bybee, Taylor, Gardner, Van Scotter, Powell, Westbrook, & Landes, 2006; Staub & Stern, 2002), the author of this study utilizes the international data set of the Teaching and Learning International Study (TALIS) 2013 to examine the associations between teachers’ constructivist beliefs, their self-efficacy beliefs, professional activities, and the school principals’ instructional leadership as related to lower secondary school teachers and principals in South Korea, Finland, and Mexico. These three countries …
Date:
August 2015
Creator:
Angnakoon, Putthachat
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Guide to Arranging Late Eighteenth and Early Nineteenth Century Harmoniemusik in an Historical Style
The wind octet was a popular ensemble of the classical period. In 1782, the Viennese Emperor formed a wind octet which specialized in playing opera arrangements. This music was used primarily as a form of background entertainment for dinners. This guide analyzes and compares the works of several well-known arrangers from the classical period in order to demonstrate arranging styles of the time. The arrangers of the period were often the performers of these various wind octets who were writing specifically for the players in their own ensembles. The style of Mozart’s original wind music is also discussed, in contrast to the arrangements of his works made by others. This guide is intended for serve performers of today as a tool to learn the art of arranging in an historical style. Idiosyncrasies of the classical-period wind instruments are discussed, as they relate to the style of wind arranging. The role of the contemporary arranger is compared with that of the classical period, and the case is made for the need for more contemporary arrangements of classical works using period arrangers as models.
Date:
August 2015
Creator:
April Marie Ross
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
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 …
Date:
August 2015
Creator:
Arjona, Alfredo
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Early Second-career Faculty: a Phenomenological Study of Their Transition Into a New Profession
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. Participants demographics were ages 34 to 68 with the average age being 45; 50% male and 50% female; and one African American, six Caucasian, and one Hispanic and/or Latino. Participants’ previous professional experience was a benefit in teaching and relating to students, in understanding the complex university bureaucracy, and in setting goals. The participants reported that mentoring, whether formally assigned by the institution or through informal means such as departmental colleagues or professional organizations, was a benefit to all of the participants. A primary area of concern for the participants was collaboration and collegiality with other faculty members. Participants stated that traditional faculty members lack the skills and training to collaborate effectively in researching and in joint teaching endeavors. Participants reported that they had to monitor and restrain their …
Date:
August 2015
Creator:
Assaad, Elizabeth A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Contributions to Descriptive Set Theory
In this dissertation we study closure properties of pointclasses, scales on sets of reals and the models L[T2n], which are very natural canonical inner models of ZFC. We first characterize projective-like hierarchies by their associated ordinals. This solves a conjecture of Steel and a conjecture of Kechris, Solovay, and Steel. The solution to the first conjecture allows us in particular to reprove a strong partition property result on the ordinal of a Steel pointclass and derive a new boundedness principle which could be useful in the study of the cardinal structure of L(R). We then develop new methods which produce lightface scales on certain sets of reals. The methods are inspired by Jackson’s proof of the Kechris-Martin theorem. We then generalize the Kechris-Martin Theorem to all the Π12n+1 pointclasses using Jackson’s theory of descriptions. This in turns allows us to characterize the sets of reals of a certain initial segment of the models L[T2n]. We then use this characterization and the generalization of Kechris-Martin theorem to show that the L[T2n] are unique. This generalizes previous work of Hjorth. We then characterize the L[T2n] in term of inner models theory, showing that they actually are constructible models over direct limit of …
Date:
August 2015
Creator:
Atmai, Rachid
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Evaluation of Freshwater Delivery Alternatives to East Matagorda Bay: Final Report
This is the final report on the freshwater delivery from the Colorado River to East Matagorda Bay.
Date:
August 26, 2015
Creator:
Austin, Barney; Kennedy, Angela; Osting, Tim & Walker, Clint
Object Type:
Report
System:
The Portal to Texas History
Puerto Rico's Current Fiscal Challenges: In Brief
This report discusses the current state of Puerto Rico's public finances. Puerto Rico faces several fiscal hurdles in 2015. Concerns regarding the sustainability of Puerto Rico's public finances have intensified over the past year, despite several measures taken by the island's government to reduce spending, increase revenues, and restructure its obligations.
Date:
August 18, 2015
Creator:
Austin, D. A.
Object Type:
Report
System:
The UNT Digital Library
A Tale of Two Cities: Exploring the Dual Language Program Implementation and Biliteracy Trajectories at Two Schools
With the increase in emergent bilinguals and higher standards for all, the challenge for educational stakeholders is to fully utilize dual language programs as a prominent means toward meeting and surpassing rigorous state and national standards. Part of maximizing dual language programs’ impact, and the purpose of this study, was to provide detailed analyses of program models and student biliteracy development. Thus, the research questions sought to explore the level of understanding and implementation of dual language programs in general and the biliteracy component in particular at each campus, before documenting the second through fifth grade English and Spanish reading biliteracy trajectories of students at each school. Both campuses experienced more challenges in the implementation of the program structure, staff quality, and professional development rather than in curriculum and instruction. Furthermore, although both campuses’ students experienced positive trajectories towards biliteracy by the end of fifth grade, each campus was characterized by different rates and correlation between English and Spanish reading growth in each grade. Finally, the researcher conducted a split plot MANOVA to examine how much variance in the biliteracy trajectories was explained by school attendance, gender, initial English oral language and initial Spanish oral language; only school of attendance …
Date:
August 2015
Creator:
Babino, Alexandra
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Traditional Bullying and Cyberbullying in Korean Children and Youth with Emotional and Behavioral Disabilities: Examination of Contributing Factors
Children and Adolescents with emotional and behavioral disabilities (EBD) are often involved in aggression, acting out, bullying, violence, substance abuse, and juvenile crime. However, the limited Korean studies have focused primarily on bullying of students with developmental disabilities or intellectual disabilities. Therefore, the current study aimed to explore contributing factors to traditional bullying and cyberbullying in Korean children and adolescents with EBD. The current study surveyed 112 students with EBD between ages of 10 and 15 and their parents (guardians). The results revealed that internalizing problem behaviors including anxious/depression, withdrawal/depression, and somatic problems significantly affected traditional bullying victimization of Korean students with EBD. The peer support was a significant factor affecting cyberbullying victimization. Furthermore, the maternal psychological control was a meaningful factor affecting perpetration at school and in cyber world. Based on the findings, the present study described implications regarding prevention and intervention programs for addressing traditional bullying and cyberbullying victimization and perpetration.
Date:
August 2015
Creator:
Baek, Ji Eun
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library