Partner
Collection
UNT Theses and Dissertations
468
Texas Digital Newspaper Program
442
Denton County Newspapers Collection
369
Denton Record-Chronicle
369
UNT Scholarly Works
75
Texas Jewish Post
51
Digital Frontiers
22
Journal of Near-Death Studies
22
UNT Open Access Symposium
22
Library Publishing Forum 2016
15
19 More
Degree Department
UNT Libraries
103
Department of Psychology
34
Department of Behavior Analysis
30
Department of Learning Technologies
25
Department of Anthropology
21
Department of Mechanical and Energy Engineering
21
Department of Chemistry
20
Department of Counseling and Higher Education
19
Department of English
19
Department of Teacher Education and Administration
19
54 More
Degree Discipline
Degree Level
Country
States
Year
Month
Language
Inter
This dissertation is has two parts: a critical essay on the lyric subject, and a collection of poems. In the essay, I suggest that, contrary to various anti-subjectivists who continue to define the lyric subject in Romantic terms, a strain of Post-Romantic lyric subjectivity allows us to think more in terms of space, process, and dialogue and less in terms of identity, (mere self-) expression, and dialectic. The view I propose understands the contemporary lyric subject as a confluence or parallax of imagined and felt subjectivities in which the subject who writes the poem, the subject personified as speaker in the text itself, and the subject who receives the poem as a reader are each repeatedly drawn out of themselves, into others, and into an otherness that calls one beyond identity, mastery, and understanding. Rather than arguing for the lyric subject as autonomous, expressive (if fictive) "I,” I have suggested that the lyric subject is a dialogical matrix of multiple subjectivities—actual, imagined, anticipated, deferred—that at once posit and emerge from a space whose only grounded, actual place in the world is the text: not the court, not the market, and not a canon of legitimized authors, but in the relatively …
Date:
May 2016
Creator:
Haines, Robert M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Thermomechanical Processing, Additive Manufacturing and Alloy Design of High Strength Mg Alloys
The recent emphasis on magnesium alloys can be appreciated by following the research push from several agencies, universities and editorial efforts. With a density equal to two-thirds of Al and one-thirds of steel, Mg provides the best opportunity for lightweighting of metallic components. However, one key bottleneck restricting its insertion into industrial applications is low strength values. In this respect, Mg-Y-Nd alloys have been promising due to their ability to form strengthening precipitates on the prismatic plane. However, if the strength is compared to Al alloys, these alloys are not attractive. The primary reason for low structural performance in Mg is related to low alloying and microstructural efficiency. In this dissertation, these terminologies are discussed in detail. A simple calculation showed that the microstructural efficiency in Mg-4Y-3Nd alloy is 30% of its maximum potential. Guided by the definitions of alloying and microstructural efficiency, the two prime objectives of this thesis were to: (i) to use thermomechanical processing routes to tailor the microstructure and achieve high strength in an Mg-4Y-3Nd alloy, and (ii) optimize the alloy chemistry of the Mg-rare earth alloy and design a novel rare—earth free Mg alloy by Calphad approach to achieve a strength of 500 MPa. Experimental, …
Date:
May 2016
Creator:
Palanivel, Sivanesh
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Investigation of the Effect of Particle Size and Particle Loading on Thermal Conductivity and Dielectric Strength of Thermoset Polymers
Semiconductor die attach materials for high voltage, high reliability analog devices require high thermal conductivity and retention of dielectric strength. A comparative study of effective thermal conductivity and dielectric strength of selected thermoset/ceramic composites was conducted to determine the effect of ceramic particle size and ceramic particle loading on thermoset polymers. The polymer chosen for this study is bismaleimide, a common aerospace material chosen for its strength and thermal stability. The reinforcing material chosen for this study is a ceramic, hexagonal boron nitride. Thermal conductivity and dielectric breakdown strength are measured in low and high concentrations of hexagonal boron nitride. Adhesive fracture toughness of the composite is evaluated on copper to determine the composite’s adhesive qualities. SEM imaging of composite cross-sections is used to visualize particle orientation within the matrix. Micro-indentation is used to measure mechanical properties of the composites which display increased mechanical performance in loading beyond the percolation threshold of the material. Thermal conductivity of the base polymer increases by a factor of 50 in 80%wt loading of 50µm hBN accompanied by a 10% increase in composite dielectric strength. A relationship between particle size and effective thermal conductivity is established through comparison of experimental data with an empirical …
Date:
May 2016
Creator:
Warner, Nathaniel A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Expansion of Musical Styles, Function of Texture, and Performing Techniques in Brian Lock's Sonic Archaeologies No. 1: A Performance Guide
British composer Brian Lock merges the composition styles of Alexander Goehr, Henryk Górecki and Witold Lutoslawski in his innovative works for instrumental sounds and electronics. His most recent work for flute, Sonic Archaeologies No.1, was premiered at the University of North Texas by Mary Karen Clardy, flute; Brian Lock, piano/electric keyboard; and Daniel Pardo, laptop/live mixing. The purpose of this dissertation is to provide flutists with artistic and technical guidance in preparing this work for flute, prerecorded orchestra, interactive electronics and improvisatory accompaniment. Sonic Archaeologies No. 1, a piece in five movements (Black Rain, Psychomania, Kodo, Susperia, and Deep in the Machine), incorporates contemporary techniques to create sounds other than the Western concert flute, with the use of live reinforcement devices such as microphones and time-based audio effects within a D.A.W. (Digital Audio Workstation.) Reggae, Hip-Hop and cinematic styles are juxtaposed within the work, fusing current genres with traditional rhythmic forms like the ones found in a bourrée. As the solo instrument, flute provides more textural than melodic elements, and the performer is required to interact with an unpredictable sonic soundscape as a result of the improvisatory element of the keyboards and computer. The notation of Sonic Archaeologies No.1 invites …
Date:
May 2016
Creator:
Pardo, Daniel (Flutist)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Conversational Use of Photographic Images on Facebook: Modeling Visual Thinking on Social Media
Modeling the "thick description" of photographs began at the intersection of personal and institutional descriptions. Comparing institutional descriptions of particular photos that were also used in personal online conversations was the initial phase. Analyzing conversations that started with a photographic image from the collection of the Library of Congress (LC) or the collection of the Manchester Historic Association (MHA) provided insights into how cultural heritage institutions could enrich the description of photographs by using informal descriptions such as those applied by Facebook users. Taking photos of family members, friends, places, and interesting objects is something people do often in their daily lives. Some photographic images are stored, and some are shared with others in gatherings, occasions, and holidays. Face-to-face conversations about remembering some of the details of photographs and the event they record are themselves rarely recorded. Digital cameras make it easy to share personal photos in Web conversations and to duplicate old photos and share them on the Internet. The World Wide Web even makes it simple to insert images from cultural heritage institutions in order to enhance conversations. Images have been used as tokens within conversations along with the sharing of information and background knowledge about them. The …
Date:
May 2016
Creator:
Albannai, Talal N.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Understanding Road Use and Road User Interaction: An Exploratory Ethnographic Study Toward the Design of Autonomous Vehicles
This thesis contributes to research that informs the design of autonomous vehicles (AVs). It examines interactions among various types of road users, such as pedestrians and drivers, and describes how findings can contribute to the design of AVs. The work was undertaken as part of a research internship at Nissan Research Center-Silicon Valley on the Human Understanding in Design team. Methods included video ethnography “travel-alongs” which captured the experience of travel from the point of view of drivers and pedestrians, analysis of interaction patterns taken from video of intersections, and analysis of road laws. Findings address the implications of what it will mean for AVs to exist as social entities in a world of varied road contexts, and how AVs might navigate the social act of driving on roads they share with a variety of human users. This thesis contributes to an emerging body of research and application on the subject of the AV in the world.
Date:
May 2016
Creator:
McLaughlin, Logan M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Taxpayer compliance from three research perspectives: a study of economic, environmental, and personal determinants.
Tax evasion is a serious issue that influences governmental revenues, IRS enforcement strategies, and tax policy decisions. While audits are the most effective method of enforcing compliance, they are expensive to conduct and the IRS is only able to audit a fraction of the returns filed each year. This suggests that audits alone are not sufficient to curb the billions of dollars of tax evaded by taxpayers each year and that a better understanding of factors influencing compliance decisions is needed to enable policymakers to craft tax policies that maximize voluntary compliance. Prior research tends to model compliance as economic, environmental, or personal decisions; however, this study models it as a multifaceted decision where these three perspective individually and interactively influence compliance. It is the first to decompose perceived detection risk into two dimensions (selection risk and enforcement risk) and investigates how these two dimensions of risk, decision domains (refund or tax due positions), and three personal factors (mental accounting, narcissism, and proactivity) influence taxpayers’ compliance decisions. I conducted a 2x2 fully crossed experiment involving 331 self-employed taxpayers. These taxpayers have opportunities to evade that employed taxpayers do not. For example, they can earn cash income that is not reported …
Date:
May 2016
Creator:
Hunt, Nicholas
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A New Lacunarity Analysis Add-In for ArcGIS
This thesis introduces a new lacunarity analysis add-in for ArcGIS.
Date:
May 2016
Creator:
Huang, Pu
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Factors influencing parental attitudes toward digital game-based learning.
The purpose of this non-positivistic mixed-methods study is to examine parental attitudes towards the use of computer and video games in their child’s classroom and to investigate how the sociocultural contexts in which parents live affect those attitudes. The research was conducted using a mixed-methods triangulation design, including both quantitative and qualitative techniques. First, the study tried to identify which groups of parents were better positioned to accept and support digital game-based learning and which groups were less likely to have a positive attitude toward integrating digital games into the classroom. This study tried to determine if socioeconomic status, age, education level, and/or cultural background could serve as a predictor of parental attitudes toward digital game-based learning. Second, the study tried to recognize how social and cultural contexts in which parents live affect their attitudes toward digital games in the classroom. Many researchers agree that parents play an important role in students’ and eventually, educators’ attitudes toward gaming. It has been argued that if parents accept a certain non-traditional (digital) learning tool, then their children would most likely have a similar attitude toward it. Parents might be the support system that educators need in order to ensure that students are …
Date:
May 2016
Creator:
Piller, Yulia
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Comparing Response Frequency and Response Effort in Reinforcer Assessments with Children with Autism
Reinforcer assessments have largely relied on the use of progressive ratio (PR) schedules to identify stimuli that function as reinforcers. PR schedules evaluate the reinforcing efficacy of a stimulus by measuring the number of responses produced in order to access a stimulus as the number of required responses increases. The current evaluation extends the literature on reinforcer assessments by measuring responding under a progressive force (PF) schedule, in addition to progressive ratio requirements. We compared responding under PR and PF schedules with two children with autism using a multielement design embedded within a reversal experimental design. Results were mixed and implications for further development of reinforcer assessment methods (particularly PF schedules) are discussed.
Date:
May 2016
Creator:
Litvin, Melanie A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Synthesis and Electron Transfer Studies of Supramolecular Triads
This study expands the role of polythiophenes as an electron donating chromophore within energy harvesting milti-modular donor-acceptor systems. The polythiophene moiety would act as an electron donating spacer group between the donor and acceptor entities, viz., phenothiazine and fulleropyrrolidine, respectively, in the newly synthesized supramolecular triads. The triads 10-{[2,2';5',2"] terthiophene-5-fulleropyrrolidine} phenothiazine and 10-{[2,2'] bithiophene-5-fulleropyrrolidine} phenothiazine were synthesized and characterized through electrochemical and spectroscopic methods to ascertain their structural integrity. the componets of the triads were selected for their established redox parameters. Phenothiazine would act as a secondary donor and would facilitate hole-transfer from the polythiophene primary electron donor, due to its ease of oxidation and yield a long-lived charge separated state. Fulleropyrrolidine would act as an acceptor for ease of reductive capabilities and its ability to hold multiple charges. Finally, occurrence of photoinduced electron transferleading to the anticipated charge separated states is established from advanced transient spectroscopic techniques on these novel supramolecular systems.
Date:
May 2016
Creator:
Bodenstedt, Kurt
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Social-Emotional Competencies of African American Children: Impact of Child-Centered Play Therapy
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 …
Date:
May 2016
Creator:
Taylor, LaKaavia
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Adoption, Management, and Performance of Local Government Investment Pools: A Comparative Analysis of State Practices
This dissertation examines the factors influencing a state’s decision to adopt a local government investment pool (LGIP), the institutional arrangements used in managing them, and the effect of the institutional types on LGIP performance. The dissertation extends the policy adoption theory with insights from investment theory to demonstrate that management credibility influences the likelihood of a state’s LGIP adoption. The study finds that the quality of financial management, the quality of professional leadership, proximate state neighbors who have previously adopted an LGIP, and economic factors determine a state’s proclivity to policy adoption. The dissertation also describes the institutional arrangements used in managing LGIPs and develops typologies based on their institutional arrangements. The dissertation compares LGIPs depending on the risk aversion of their institutional arrangements. The research extends the risk-return tradeoff in investment theory to LGIP institutional arrangements. The empirical findings show that LGIP institutional arrangement that has greater risk report higher performance. The dissertation also finds that competition in the LGIP market due to multiple vendors, and periods of economic recession account for higher performance because of higher risk-taking behaviors associated with them. This dissertation promotes public funds investment laws that emphasize prudent management of government finances and guides managers …
Date:
May 2016
Creator:
Nukpezah, Julius Atsu
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Evaluating the Effectiveness of a Competency-Based Training Package to Teach Behavior Management Skills to Direct Support Staff
Cooper, Heron and Heward define maintenance as the extent to which a learner continues to perform a target behavior after the intervention has been terminated. Testing for maintenance allows the trainer to see if gains were sustained following the termination of a treatment program. In addition, once it is shown that a learner's skills have remained in the repertoire, assessment of generalization is possible. Previous literature in behavior skills training have assessed maintenance in a variety of settings for a variety of skills. Following maintenance assessments, booster sessions are commonly used to re-train skills that did not maintain at criterion levels. The current project assessed the maintenance of caregivers' skills following a training package used to teach three behavior management techniques (use reinforcement, pivot, protect-redirect) at a large, residential care facility. Procedures were developed to assess caregivers' maintenance of the three behavior management techniques using a pre-test- post-test design. If needed, skills were re-established using 5-20 minute booster sessions. The results showed that time between post-test and maintenance did not seem to have a strong effect on maintenance scores. In general, post-test scores were somewhat indicative of maintenance scores, and patterns were most apparent across tools.
Date:
May 2016
Creator:
Harris, Kellen-Jade S.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Ozone Pollution of Shale Gas Activities in North Texas
The effect of shale gas activities on ground-level ozone pollution in the Dallas-Fort Worth area is studied in detail here. Ozone is a highly reactive species with harmful effects on human and environment. Shale gas development, or fracking, involves activities such as hydraulic fracturing, drilling, fluid mixing, and trucks idling that are sources of nitrogen oxides (NOX) and volatile organic compounds (VOC), two of the most important precursors of ozone. In this study two independent approaches have been applied in evaluating the influences on ozone concentrations. In the first approach, the influence of meteorology were removed from ozone time series through the application of Kolmogorov-Zurbenko low-pass filter, logarithmic transformation, and subsequent multi-linear regression. Ozone measurement data were acquired from Texas Commission on Environmental Quality (TCEQ) monitoring stations for 14 years. The comparison between ozone trends in non-shale gas region and shale gas region shows increasing ozone trends at the monitoring stations in close proximity to the Barnett Shale activities. In the second approach, the CAMx photochemical model was used to assess the sensitivity of ozone to the NOX and VOC sources associated with shale oil and gas activities. Brute force method was applied on Barnett Shale and Haynesville Shale emission …
Date:
May 2016
Creator:
Ahmadi, Mahdi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Perceptions of Policymakers on the Transfer Pathway in Texas Public Higher Education
Community college students transfer to public universities experiencing a pathway filled with complexity and inequity. Transfer students are not able to graduate at the same pace as native students at the university and complete their baccalaureate degrees 18% below the rate of native students. Policymakers have attempted to address the baccalaureate gap. This qualitative study explored the perspectives of Texas policymakers and policy influencers on the efficacy of policies intended to improve transfer outcomes. This study investigated what experience participants have with transfer policy, what their perceptions of the transfer pathway are, and how their voices can refine an understanding of policy development and ways to improve student persistence. Purposeful sampling was used to explore the perspectives of 14 Texas policymakers and those that influence policy. Findings revealed that significant gaps exist between expectations and student realities and that the completion agenda is driving policy decisions. Participants perceived that transfer students have been ignored in the completion metrics, which influence institutional priorities. Moreover, the decentralized system of independent, autonomous institutions is a major contributor to inefficiencies such as excessive student credit hours. Improving the transferability of courses was a priority recommendation of all participants both because it benefits the State’s …
Date:
May 2016
Creator:
Faris, Kimberly A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Influence of High Strain Rate Compression on Microstructure and Phase Transformation of NiTi Shape Memory Alloys
Since NiTi shape memory alloy (SMA) was discovered in the early 1960s, great progress has been made in understanding the properties and mechanisms of NiTi SMA and in developing associated products. For several decades, most of the scientific research and industrial interests on NiTi SMA has focused on its superelastic applications in the biomedical field and shape memory based “smart” devices, which involves the low strain rate (around 0.001 s^-1) response of NiTi SMA. Due to either stress-induced martensite phase transformation or stress induced martensite variant reorientation under the applied load, NiTi SMA has exhibited a high damping capacity in both austenitic and martensitic phase. Recently, there has been an increasing interest in exploitation of the high damping capacity of NiTi SMA to develop high strain rate related applications such as seismic damping elements and energy absorbing devices. However, a systematic study on the influence of strain, strain rate and temperature on the mechanical properties, phase transformation, microstructure and crystal structure is still limited, which leads to the difficulties in the design of products being subjected to high strain rate loading conditions. The four main objectives of the current research are: (1) achieve the single loading and the control of …
Date:
May 2016
Creator:
Qiu, Ying
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Information Structures in Notated Music: Statistical Explorations of Composers' Performance Marks in Solo Piano Scores
Written notation has a long history in many musical traditions and has been particularly important in the composition and performance of Western art music. This study adopted the conceptual view that a musical score consists of two coordinated but separate communication channels: the musical text and a collection of composer-selected performance marks that serve as an interpretive gloss on that text. Structurally, these channels are defined by largely disjoint vocabularies of symbols and words. While the sound structures represented by musical texts are well studied in music theory and analysis, the stylistic patterns of performance marks and how they acquire contextual meaning in performance is an area with fewer theoretical foundations. This quantitative research explored the possibility that composers exhibit recurring patterns in their use of performance marks. Seventeen solo piano sonatas written between 1798 and 1913 by five major composers were analyzed from modern editions by tokenizing and tabulating the types and usage frequencies of their individual performance marks without regard to the associated musical texts. Using analytic methods common in information science, the results demonstrated persistent statistical similarities among the works of each composer and differences among the work groups of different composers. Although based on a small …
Date:
May 2016
Creator:
Buchanan, J. Paul
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Deva Plus Dog
Deva Plus Dog is a look at the life of a teenage girl singularly devoted to the sport of dog agility. The film explores how relationships develop and evolve in the high stakes world of competition, and how an alternative lifestyle impacts a youth’s coming of age.
Date:
May 2016
Creator:
Beavers, Hannah
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Design of New Monodentate Ligands for Regioselectivity and Enantioselectivity Tuning in Late Transition Metal Catalysis
The ability of gold(I) to activate many types of unsaturated bonds toward nucleophilic attack was not widely recognized until the early 2000s. One major challenge in gold catalysis is the control over regioselectivity when there are two or more possible products as a result of complicated mechanistic pathways. It is well know that the choice of ligand can have dramatic effects on which pathway is being followed but very rarely are the reasons for this selectivity understood. The synthesis of new acyclic diaminocarbenes was developed and a study of the ligand effects on the regioselectivity of a gold-catalyzed domino enyne cyclization hydroarylation reaction and a Nazarov cyclization was undertaken. New chiral acyclic diaminocarbenes were also developed and tested along side new C3-symmetric phosphite ligands in an asymmetric intramolecular hydroamination of allenes. Structure activity correlations were developed for the potential use in further rational ligand design. The synthesis of 6a,7-dihydro-5-amino-dibenzo[c,g]chromene derivatives via a gold-catalyzed domino reaction of alkynylbenzaldehydes in the presence of secondary amines was developed. These were sent to be screened for biological activity.
Date:
May 2016
Creator:
Ruch, Aaron A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Laser Ablation Inductively Coupled Plasma Mass Spectrometry and Raman Spectroscopy Imaging of Biological Tissues
Laser Ablation Inductively coupled plasma mass spectrometry (LA-ICP-MS) and Raman spectroscopy are both powerful imaging techniques. Their applications are numerous and extremely potential in the field of biology. In order to improve upon LA-ICP-MS an in-house built cold cell was developed and its effectiveness studied by imaging Brassica napus seeds. To further apply LA-ICP-MS and Raman imaging to the field of entomology a prong gilled mayfly (Ephemeroptera: Leptophlebiidae) from the Róbalo River, located on Navarino Island in Chile, was studied. Analysis of both samples showcased LA-ICP-MS and Raman spectroscopy as effective instruments for imaging trace elements and larger molecules in biological samples respectively.
Date:
May 2016
Creator:
Gorishek, Emma Lee
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Impetuses for First, Second, and Third Year Law Student Information Seeking Behavior, and Perception of Common Knowledge and Citation
This dissertation examined how previous information literacy training, law student gender, age, and previously obtained education affects first, second, and third year law students selection of information sources, their understanding of common knowledge, and their decision of whether or not to give attribution to these sources. To examine these factors, this study implemented a paradigm called the principle of least effort that contended humans in general tended to complete the least amount of work possible to complete presented tasks. This study sought to discover whether law students follow this same path of completing the least amount of work possible to finish presented tasks, and whether this behavior affects information source selection, citation, and understanding of common knowledge. I performed six focus groups and crafted and disseminated an online survey to examine these factors. Via this data collection, it was discovered that law students do exhibit some differences in understanding of citation and citation behavior based on age and their year in law school. They also exhibited some differences regarding common knowledge based on their year in law school, where they received their information literacy training, and where they attend law school. Yet, no statistically significant differences were discovered regarding where …
Date:
May 2016
Creator:
Helge, Kris
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Analysis of the Leadership Development Competency Frameworks of Nontraditional Principal Preparation Programs
This study explored the competency frameworks of nontraditional principal preparation programs to determine how they aligned to research-based best practices for school leaders. The research questions that guided this work were: To what degree are the McREL 21 Leadership Responsibilities addressed in the competency frameworks of nontraditional principal preparation programs? How do the leaders of the nontraditional principal preparation programs view the degree to which their competencies include the McREL 21 Leadership Responsibilities? A multi-case study analysis was conducted that compared the competency frameworks of four nontraditional principal preparation programs. The Knowledge is Power Program (KIPP), New Leaders, New York City Leadership Academy (NYCLA), and Teaching Trust were the nontraditional programs selected for this study. Leaders from the four organizations were interviewed. The findings from the research illustrated that a majority of the McREL 21 Leadership Responsibilities were included in the competency frameworks of nontraditional principal preparation programs. The study revealed that four of the McREL 21 were not included in any of the competency frameworks. Another finding was the lack of focus on talent management and personal dispositions in the McREL 21 Leadership Responsibilities. Nontraditional principal preparation programs are a growing avenue for principal preparation, as such their use …
Date:
May 2016
Creator:
Horton, Tonya
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Fatigue Behavior of A356 Aluminum Alloy
Metal fatigue is a recurring problem for metallurgists and materials engineers, especially in structural applications. It has been responsible for many disastrous accidents and tragedies in history. Understanding the micro-mechanisms during cyclic deformation and combating fatigue failure has remained a grand challenge. Environmental effects, like temperature or a corrosive medium, further worsen and complicate the problem. Ultimate design against fatigue must come from a materials perspective with a fundamental understanding of the interaction of microstructural features with dislocations, under the influence of stress, temperature, and other factors. This research endeavors to contribute to the current understanding of the fatigue failure mechanisms. Cast aluminum alloys are susceptible to fatigue failure due to the presence of defects in the microstructure like casting porosities, non-metallic inclusions, non-uniform distribution of secondary phases, etc. Friction stir processing (FSP), an emerging solid state processing technique, is an effective tool to refine and homogenize the cast microstructure of an alloy. In this work, the effect of FSP on the microstructure of an A356 cast aluminum alloy, and the resulting effect on its tensile and fatigue behavior have been studied. The main focus is on crack initiation and propagation mechanisms, and how stage I and stage II cracks …
Date:
May 2016
Creator:
Nelaturu, Phalgun
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library