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  Partner: UNT Libraries
 Resource Type: Thesis or Dissertation
 Decade: 2010-2019
A Search for Periodic and Quasi-Periodic Patterns in Select Proxy Data with a Goal to Understanding Temperature Variation

A Search for Periodic and Quasi-Periodic Patterns in Select Proxy Data with a Goal to Understanding Temperature Variation

Date: 2016-5
Creator: Otto, James
Description: In this work over 200 temperature proxy data sets have been analyzed to determine if periodic and or quasi-periodic patterns exist in the data sets. References to the journal articles where data are recorded are provided. Chapter 1 serves an introduction to the problem of temperature determination in providing information on how various proxy data sources are derived. Examples are given of the techniques followed in producing proxy data that predict temperature for each method used. In chapter 2 temperature proxy data spanning the last 4000 years, from 2,000 BCE to 2,000 CE, are analyzed to determine if overarching patterns exist in proxy data sets. An average of over 100 proxy data sets was used to produce Figure 4. An overview of the data shows that several “peaks” can be identified. The data were then subjected to analysis using a series of frequency modulated cosine waves. This analysis led to a function that can be expressed by equation 3. The literature was examined to determine what mathematical models had been published to fit the experimental proxy data for temperature. A number of attempts have been made to fit data from limited data sets with some degree of success. Some other ...
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Social-Emotional Competencies of African American Children: Impact of Child-Centered Play Therapy

Social-Emotional Competencies of African American Children: Impact of Child-Centered Play Therapy

Date: 2016-5
Creator: Taylor, LaKaavia
Description: African American children experience risks due to heightened socio-environmental problems and responding to negative racial messages in their environments. Child Centered Play Therapy (CCPT) is one viable intervention for the development of social emotional competence among African American children to help mediate adverse conditions. I sought to explore the effects of CCPT on the social emotional competencies of African American children utilizing Social Emotional Assets and Resilience Scale-Parent & Teacher (SEARS-P; SEARS-T) reports. Thirty-seven African American participants with a mean age of 6.68 years were recruited from four suburban elementary schools in the southwest U.S. Twenty participants were randomly assigned to the intervention group receiving a mean of 13.3 CCPT sessions over 8 weeks, and 17 participants were assigned to the waitlist control group. Factorial ANOVA results indicated that parents reported statistically and practically significant improvement for children who participated in CCPT in overall social-emotional competencies. Follow-up analysis revealed statistical and practical improvement in children’s empathy, as well as practical improvement in self-regulation/responsibility and social competence. Teacher-reported results indicated practical but non-statistically significant improvement in overall social-emotional competencies for children who participated in CCPT, including statistical and practical improvement in children’s responsibility, as well as practical improvement in self-regulation, social ...
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The Contemporary Bassoonist: Music for Interactive Electroacoustics and Bassoon

The Contemporary Bassoonist: Music for Interactive Electroacoustics and Bassoon

Date: 2016-5
Creator: Masone, Jolene Karen
Description: As the bassoon has evolved over time, the music written for the instrument has evolved around it, and was many times the catalyst for its evolution. Bassoon music of the seventeenth through early twentieth centuries has defined much of the curricula for bassoon studies, and has established how we consider and experience the bassoon. We experience, write, and consume music in vastly different ways than just a generation ago. Humans use technology for the most basic of tasks. Composers are using the technology of our generation to compose music that is a reflection of our time. This is a significant aspect of art music today, and bassoonists are barely participating in the creation of this new repertoire. Performance practice often considers only the musical score; interactive electronic music regularly goes beyond that. The combination of technological challenges and inexperience can make approaching electroacoustic music a daunting and inaccessible type of music for bassoonists. These issues require a different language to the performance practice: one that addresses music, amplification, computer software, hardware, the collaboration between performer and technology, and often the performer and composer. The author discusses problems that performers face when rehearsing and performing interactive electroacoustic works for bassoon, and ...
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Miz Markley

Miz Markley

Date: 2016-5
Creator: Vance, Sharie
Description: Lisa Markley, a.k.a. "Miz Markley", is a genuinely happy person even if she is not particularly financially successful as a musician. In an effort to validate my own choices as an artist, I chose to follow her. What was intended to be a portrait of a working musician, becomes instead a feminist musical essay film about the transformative power of art making.
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Analysis of Factors for Successful State-Level Support of Low-Performing Schools

Analysis of Factors for Successful State-Level Support of Low-Performing Schools

Date: 2016-5
Creator: Ewing, Angela R.
Description: This study provides a qualitative look at Texas' Professional Service Providers' (PSPs) strategies for supporting low-performing schools. Four PSPs were selected for participation based on the number of schools they helped exit the Texas Title I School Improvement Program from 2007-2012. Data collected and analyzed included provider and principal interviews, providers' progress reports documenting services, and principals' evaluations of provider services. Results indicated key support strategies in two of four cases were supporting and mentoring/coaching while communicating and building trust were important in the other two cases. Communicating, reviewing information, and planning were important across all cases. The quality indicators aligning with the PSPs' strategies were fit, comprehensiveness, and coherence. They were also the most common across all cases. Finally, analysis of the evaluation of provider services revealed PSP-1 with the highest ratings, followed by PSP-2, PSP-3, and PSP-4 respectively. The findings suggest, first, that PSP support has a dual nature. Contextual support was provided based on the campus leaderships' skills and requests. PSPs also ensured coherence among the strategies of all stakeholders. Secondly, a hierarchy of quality service indicators aligned to the PSPs' strategies: fit, comprehensiveness, and coherence. Finally relationships are vital to a successful provider-campus relationship. The findings ...
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Medical comorbidity in the course of bipolar disorder.

Medical comorbidity in the course of bipolar disorder.

Access: Use of this item is restricted to the UNT Community.
Date: 2016-5
Creator: Smith, Patrick M
Description: Bipolar disorder is a serious illness affecting approximately 2-4% of the population and is one of the world’s leading causes of disability. In individuals with bipolar disorder, medical comorbidity associated with cardiovascular, respiratory and endocrine disorders is related to increased rates of mortality. Recent updates to multi-system inflammatory related conceptualizations of bipolar disorder focus on the unique power that medical illness and biological processes may play as factors associated with course and outcome in bipolar disorder. The current study examined medical comorbidity and its associations with various demographic and psychological variables in individuals with bipolar disorder, schizophrenia, and major depressive disorder with psychotic features followed for 10 years from their first hospital admission. When compared to an age, gender and race-matched control sample from the population, those with bipolar disorder had significantly higher medical comorbidity across a range of medical diagnoses both at 6 months and 10 years after first hospital admission. Ten years following initial hospitalization, individuals in all three diagnostic groups reported increased rates of diabetes (OR: 2.0 – 3.7), stroke (OR: 4.6 – 7.0) and asthma (OR: 1.9 - 3.1), and individuals with bipolar disorder reported increased rates of cancer (OR = 2.1). A number of psychological ...
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Online Pornography and Its Effects on the Behavior of College Students

Online Pornography and Its Effects on the Behavior of College Students

Date: 2016-5
Creator: Hassell, Michelle Stefanie
Description: The primary goal of this study was to investigate the habits of college students who use pornography. The study was designed to collect data on the use of online pornography by college students. Through the use of an online survey, the study collected general demographic data and data on the frequency with which students used online pornography. The study also collected data on the general attitudes of college students towards online pornography. Participants consisted of students enrolled at the University of North Texas during the Spring 2016 semester. The participants of the study were contacted by an email requesting the student to respond to an online anonymous survey regarding their use of online pornography. The survey consisted of thirty questions and statements, primarily utilizing a five point Likert scale. Analysis of the data collected as well as a discussion of the findings are included.
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Innovative Cold-Formed Steel Shear Walls with Corrugated Steel Sheathing

Innovative Cold-Formed Steel Shear Walls with Corrugated Steel Sheathing

Date: 2016-5
Creator: Mahdavian, Mahsa
Description: This thesis presents two major sections with the objective of introducing a new cold-formed steel (CFS) shear wall system with corrugated steel sheathings. The work shown herein includes the development of an optimal shear wall system as well as an optimal slit configuration for the CFS corrugated sheathings which result in a CFS shear wall with high ductility, high strength, high stiffness and overall high performance. The conclusion is based on the results of 36 full-scale shear wall tests performed in the structural laboratory of the University of North Texas. A variety of shear walls were the subject of this research to make further discussions and conclusions based on different sheathing materials, slit configurations, wall configurations, sheathing connection methods, wall dimensions, shear wall member thicknesses, and etc. The walls were subject to cyclic (CUREE protocol) lateral loading to study their deformations and structural performances. The optimal sit configuration for CFS shear walls with corrugated steel sheathings was found to be 12×2 in. vertical slits in 6 rows. The failure mode observed in this shear wall system was the connection failure between the sheathing and the framing members. Also, most of the shear walls tested displayed local buckling of the chord ...
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Transmedia STEM Intervention Book in Middle School for Educational Change

Transmedia STEM Intervention Book in Middle School for Educational Change

Date: 2016-5
Creator: Stansell, Alicia Renee
Description: The world is becoming a global place in which science, technology, engineering and mathematics hold a key to a successful future. To help secure this future it is important to engage students early with relevant curriculum that sparks interest and success in STEM fields. However, education reform occurs slowly, so this paper looked at a potential paradigm that can help to bring about change in a middle school environment that harnesses the long standing strengths of learning and education with the integration of technology to create changes in the pedagogy of learners and teachers. The study implemented a transmedia STEM book and evaluated the impact it had on student perceptions of STEM, school attitude, academic achievement, and preferred activity types, providing an example vehicle for change that can be adopted over time. The main findings showed that students who used a 3-Dimensional printer had higher math achievement and a more positive perception of math.
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Microstructural Phase Evolution In Laser Deposited Compositionally Graded Titanium-Chromium Alloys

Microstructural Phase Evolution In Laser Deposited Compositionally Graded Titanium-Chromium Alloys

Access: Use of this item is restricted to the UNT Community.
Date: 2016-5
Creator: Thomas, Jonova
Description: A compositionally graded Ti-xCr (10≤x≤30 wt%) alloy has been fabricated using Laser Engineered Net Shaping (LENSTM) to study the microstructural phase evolution along a compositional gradient in both as-deposited and heat treated conditions (1000°C followed by furnace cooling or air cooling). The alloys were characterized by SEM BSE imaging, XRD, EBSD, TEM and micro-hardness measurements to determine processing-structure-property relations. For the as-deposited alloy, α-Ti, β-Ti, and TiCr2 (C15 Laves) phases exist in varying phase fractions, which were influential in determining hardness values. With the furnace cooled alloy, there was more homogeneous nucleation of α phase throughout the sample with a larger phase fraction of TiCr2 resulting in increased hardness values. When compared to the air cooled alloy, there was absence of wide scale nucleation of α phase and formation of ω phase within the β phase due to the quicker cooling from elevated temperature. At lower concentrations of Cr, the kinetics resulted in a diffusionless phase transformation of ω phase with increased hardness and a lower phase fraction of TiCr2. In contrast at higher Cr concentrations, α phase separation reaction occurs where the β phase is spinodally decomposed to Cr solute-lean β1 and solute-rich β2 resulting in reduced hardness.
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