UNT Theses and Dissertations - 21,383 Matching Results

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Association Between Folate, Vitamin B12 and Cognitive Performance in Demented Elderly.

Description: Dementia is prevalent among elderly people. As the world population ages, it is projected that the number of people affected by dementia may triple in the next 50 years. Over the last two decades, research has focused on identifying potentially modifiable risk factors in development and progression of dementia, such as vitamin B12 and folate. Results concerning the effects of low folate and vitamin B12 on cognitive performance are mixed. The main objective of the present study was to investigat… more
Date: August 2008
Creator: Serova, Svetlana
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Authentic Transformational Leadership and Implicit Leadership Theories.

Description: Transformational leadership describes a leader who motivates followers to performance beyond expectations, but it has often been attacked for its potential to be abused. A newer form of leadership has been proposed, that of authentic leadership. Authentic leadership is an over-arching concept that proposes to include transformational leadership and all positive forms of leadership. At the heart of authentic leadership is the concept of ethicality. The concept of authenticity may contribute … more
Date: August 2008
Creator: Nichols, Thomas W.
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Carl Orff's Carmina Burana: A Comparative Study of the Original for Orchestra and Choruses with the Juan Vicente Mas Quiles Wind Band and Chorus Arrangement.

Description: The 1994 publication of a new version of Carl Orff's Carmina Burana, arranged for winds, percussion and choruses by Juan Vicente Mas Quiles, created new possibilities for the performance of Orff's monumental work. This dissertation serves as a guide to the study and performance of the Mas Quiles arrangement of Carmina Burana. Chapter One presents a brief discussion of Carl Orff and his Carmina Burana, followed in Chapter two by a short discussion of Mas Quiles' and the other significant transc… more
Date: August 2008
Creator: Simon, Philip G.
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Carl Sandburg's Timeless Prairie: Philip Wharton's Song Cycle, The Prairie Sings

Description: The connection of music and verse evident in the work of American poet, Carl Sandburg, is a topic that has received inadequate attention. Much preexisting research has focused on Sandburg's work with The American Songbag anthology; however little has been written about music composers' settings of his verse. The relevance of Sandburg's work as a poet has faded in today's society; the rural prairie subject matter and his poetic style are deemed archaic in an ever-evolving mechanistic society. … more
Date: August 2008
Creator: Wunderlich, Kristen A.
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A Case Study of Intervention with an At-Risk Preschool Child.

Description: This study evaluates archival data from a home intervention with an at-risk preschool child and her family. The intervention model studied was created by the Developmental Research Lab at Texas Christian University. Data was collected prior to and during the first 4 weeks of intervention to assess change in parent-child interaction, behavior and neurochemical profile. Measures used include coding of videotape recordings of the intervention, neurotransmitter levels taken via subject urine sample… more
Date: August 2008
Creator: Johnson, Elizabeth Proffitt
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Central American Media: A Comparative Study of Media Industries in Guatemala, Nicaragua, Honduras, El Salvador, and Costa Rica.

Description: The five countries that lie on the isthmus connecting North and South America have endured a past of colonialism, civil war, and natural disaster. As these countries evolve in the 21st century, growing economies and political peace provide a promising outlook for the citizens of these nations. The media industries in these nations have varying levels of development which are explored in this thesis. Using Michael Porter's 1990 framework and a case study methodology, this thesis explores th… more
Date: August 2008
Creator: Salzman, Catherine C.
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Characteristics of Preservice Teachers Learning Parent Involvement Practices.

Description: Numerous models of IS success and technology acceptance their extensions have been proposed and applied in empirical. This study continues this tradition and extends the body of knowledge on the topic of IS success by developing a more comprehensive model for measuring IS success and technology acceptance within a government organization. The proposed model builds upon three established IS success and technology acceptance frameworks namely the DeLone and McLean (2003), Venkatesh et al.'s (2003… more
Date: August 2008
Creator: Trotti, Judy
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Child Soldiers and Intrastate Armed Conflicts: An Analysis of the Recruitments of Child Soldiers in Civil Wars Between 2001 and 2003.

Description: This thesis examines why some governments and rebel organizations but not others recruit children to be child soldiers. The theory posits that if a country fights in a civil war of long duration, armed groups are more likely to recruit children as soldiers. I find that the probability of child soldier recruitment increases when a country experiences following conditions: a longer duration of civil war, a large proportion of battle deaths, a large number of refugees, a high infant mortality rate… more
Date: August 2008
Creator: Samphansakul, Attaphorn
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Children of Teenage Mothers: School Readiness Outcomes and Predictors of School Success.

Description: The purpose of this study was to examine the effects of teenage motherhood on the school readiness, literacy skills, and parental involvement of children participating in the Home Instruction for Parents of Preschool Youngsters (HIPPY) early intervention program, as well as make recommendations for optimal outcomes. Study children were participants in HIPPY at five diverse, urban school districts. Using a mixed method design, this study examined the results of quantitative measures of children… more
Date: August 2008
Creator: Brown, Amber L.
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Choices in Reinforcer Delivery

Description: The current study consisted of two experiments, both of which were comparisons of choice conditions replicated across four participants. Four typically-developing pre-school children participated in this study. Experiment 1 evaluated participants' preference for choosing consequent stimuli prior to engaging in academic tasks (pre-session choice) versus choosing consequent stimuli each time criterion for reinforcement had been met within the session (within-session choice). In Experiment 2, pref… more
Date: August 2008
Creator: Law, Sarah Ann
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Choral Resonance: Re-Examining Concepts of Tone and Unification.

Description: Resonant singing creates possibilities with dynamic shading, subtlety of phrasing, and rich vibrant tone that astonishes listeners. Choral singing that employs resonance as a fundamental ensemble virtue yields impressive results that lend themselves well to the varying demands of any choral score. Fortunately, choruses of every level can benefit from an increased understanding of the basic principles of resonance in the singing voice. Research on issues of upper partial energy and … more
Date: August 2008
Creator: Quist, Amanda Renee
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Clestrinye [El Carnaval del Perdón]: Traditional Rituals in Intermedia Composition.

Description: In Part I of this thesis, I examine the use of Latin American rituals, ceremonies, and traditional folklore as conceptual and compositional material; studying and re-contextualizing concepts, cultures, and ideologies, and introducing them to foreign audiences. I explore issues such as laptop improvisation, interaction with other performance forces, and the utilization of the social elements of non-western celebrations, as explored in Clestrinye, a work for live and fixed electronics, mixed ens… more
Date: August 2008
Creator: Salazar, Camilo
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Comparing and contrasting college algebra success rates in traditional versus eight-week courses at a specific community college: A single institution case study.

Description: There is a need to understand the relationship between, the traditional 16-week versus an 8-week, and college-level mathematics success rates. This study applied chi-square (χ2) and analysis of variance to compare and contrast which course length of time, 8-weeks or 16-weeks, for college algebra resulted in a higher proportion of students successfully completing the course. In addition, success rates among ethnicities, gender, and age groups were also examined. The population sample for this… more
Date: August 2008
Creator: Reyes, Czarina S.
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Comparison of Client Attendance, Attrition, and Outcomes in 2 Class System Packages.

Description: Using the principles of systems analysis as a guide, this study compared two class schedule formats used by Behavior Management and Parenting Services (BMAPS) in order to address the following research questions: 1) What effects do 2 different class formats have on student attrition and appointment keeping? 2) What effects do 2 different class formats have on student outcomes on a pre and posttest assessment? 3) What effects do 2 different class formats have on staff procedures? BMAPS provi… more
Date: August 2008
Creator: Berends, Valori
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Computational Studies of Bonding and Phosphorescent Properties of Group 12 Oligomers and Extended Excimers.

Description: Density functional (ca, BLYP, BPW91, B3LYP and B3PW91), MP2 and CCSD(T) methods in combination with LANL2DZ or cc-pVxZ-PP (where x=D(double), T(triple) Q(quadruple), and 5(quintuple)) basis sets have been employed in computing electronic transition energies of zinc and cadmium monomers. CCSD(T)/aug-cc-pV5Z-PP combination finds values that are 150 cm-1 from the experimental value for the zinc monomer and 240 cm-1 remove from the cadmium monomer excitation experimental value. These method/bas… more
Date: August 2008
Creator: Determan, John J.
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A Constructive Method for Finding Critical Point of the Ginzburg-Landau Energy Functional

Description: In this work I present a constructive method for finding critical points of the Ginzburg-Landau energy functional using the method of Sobolev gradients. I give a description of the construction of the Sobolev gradient and obtain convergence results for continuous steepest descent with this gradient. I study the Ginzburg-Landau functional with magnetic field and the Ginzburg-Landau functional without magnetic field. I then present the numerical results I obtained by using steepest descent with t… more
Date: August 2008
Creator: Kazemi, Parimah
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Contemporary Patterns of Democratic Norms and Political Participation in Mexico

Description: Mexico's cultural norms have been the subject of repeated inquiries because democratic and authoritarian patterns appear concomitantly. However, few have focused on the potential demographic and contextual sources of these divergent results. This study attempts to clarify the sources of Mexico's political culture, and then determine the extent to which these factors affect political participation. Statistical analysis of a LAPOP dataset from 2006 makes limited progress to this end. The sour… more
Date: August 2008
Creator: Ramsey, Adam Perry
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Correlates of a Past Behavior Interview for the Business Unit Leader: Experience, Motivation, Personality and Cognitive Ability

Description: This research evaluates the relationship between various individual differences constructs and performance on a past behavior interview (PBI)-one of the most popular forms of personnel selection interviews used today-within a sample of business unit leader level incumbents and applicants from organizations across the United States. Correlation analysis is conducted on the relationship between overall performance on a PBI and four work-related constructs: Experience, Motivation, Personality, and… more
Date: August 2008
Creator: Conner, Lane A.
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Dallas, Poverty, and Race: Community Action Programs in the War on Poverty

Description: Dallas is a unique city whose history has been overshadowed by its elite. The War on Poverty in Dallas, Texas, has been largely overlooked in the historical collective. This thesis examines the War on Poverty, more specifically, Community Action Programs (Dallas County Community Action Committee) and its origin and decline. It also exams race within the federal program and the push for federal funding among the African American and Mexican American communities. The thesis concludes with fi… more
Date: August 2008
Creator: Rose, Harriett DeAnn
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Defining the Information Security Posture: An Empirical Examination of Structure, Integration, and Managerial Effectiveness

Description: The discipline of information security management is still in its infancy as evidenced by the lack of empirical scholarly work in this area. Most research within the information security domain focuses on specific technologies and algorithms and how it impacts the principles of confidentiality, integrity, and availability. But, an important area receiving little attention is the antecedents of effective information security management at the organizational level (Stanton, Guzman, Stam & Caldera… more
Date: August 2008
Creator: Young, Randall Frederick
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Definition of Brittleness: Connections Between Mechanical and Tribological Properties of Polymers.

Description: The increasing use of polymer-based materials (PBMs) across all types of industry has not been matched by sufficient improvements in understanding of polymer tribology: friction, wear, and lubrication. Further, viscoelasticity of PBMs complicates characterization of their behavior. Using data from micro-scratch testing, it was determined that viscoelastic recovery (healing) in sliding wear is independent of the indenter force within a defined range of load values. Strain hardening in sliding we… more
Date: August 2008
Creator: Hagg Lobland, Haley E.
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Development of the Trauma Play Scale: Comparison of Children Manifesting a History of Interpersonal Trauma with a Normative Sample.

Description: Experts in traumatology have postulated traumatized children play differently than non-traumatized children. These differences are called posttraumatic play and include the behaviors of intense play, repetitive play, play disruption, avoidant play and negative affect. The purpose of this study is the continued development of the Trauma Play Scale through the addition of a normative sample. The Trauma Play Scale is an observation-based instrument designed to distinguish the play behaviors of chi… more
Date: August 2008
Creator: Myers, Charles Edwin
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The Effectiveness of the Geriatric Depression Scale to Distinguish Apathy From Depression in Alzheimer's Disease and Related Dementias.

Description: Early detection of Alzheimer's disease (AD) and related dementias in the elderly is critical for improving treatment methods and is a necessary component for improving public health interventions. One of the earliest and most common behavioral syndromes of AD is apathy and is associated with executive dysfunction. Apathy in AD is often misdiagnosed as depression due to an overlap in symptoms. Studies that have found depression to be associated with executive dysfunction have not always controll… more
Date: August 2008
Creator: Davis, Tommy E., Jr.
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The Effects of a Human Resources Information Technology Intervention on Background Check Processing in a Financial Institution: a Process Level Analysis.

Description: The human resources department of a financial institution implemented a multi-component intervention to replace a paper-based hiring system. Organization-wide impacts included changes in the background check operations. To support changes, training was conducted and procedure manuals distributed. Turn time for background checks decreased, but a combination of factors may be responsible. Other metrics are either inconclusive or suggest a confounding variable, yet quality of work did not suffe… more
Date: August 2008
Creator: Mallari, Alexander David
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