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Thermochemical investigations of crystalline solutes in non-electrolyte solutions: Mathematical representation of solubility data and the development of predictive solubility equations in systems with specific and non-specific interactions.

Description: Understanding the thermodynamic properties of multicomponent mixtures is of critical importance in many chemical and industrial applications. Experimental measurements become progressively difficult as the number of solution components increases -- producing the need for predictive models. Problems in development of predictive models arise if the mixture has one or more components that interact through molecular complexation or association. Experimental solubilities of anthracene and pyrene di… more
Date: May 2008
Creator: Zvaigzne, Anita Ilze
Partner: UNT Libraries
open access

A Comparative Analysis of Minoru Miki's Time For Marimba and Concerto for Marimba and Orchestra

Description: Minoru Miki's first two marimba compositions, Time for Marimba (1968) and Concerto for Marimba and Orchestra (1969) were composed at a revolutionary time-period for the marimba. Due to unique and innovative compositional techniques, Miki helped establish the marimba as a true concert instrument capable of performing music of the highest quality. As a pioneer in composing for marimba literature, Miki was able to capture the true essence of the marimba; a timeless quality that has helped Time f… more
Date: December 2008
Creator: Zator, Brian Edward
Partner: UNT Libraries
open access

Direct Online/Offline Digital Signature Schemes.

Description: Online/offline signature schemes are useful in many situations, and two such scenarios are considered in this dissertation: bursty server authentication and embedded device authentication. In this dissertation, new techniques for online/offline signing are introduced, those are applied in a variety of ways for creating online/offline signature schemes, and five different online/offline signature schemes that are proved secure under a variety of models and assumptions are proposed. Two of the pr… more
Date: December 2008
Creator: Yu, Ping
Partner: UNT Libraries
open access

Metallization and Modification of Low-k Dielectric Materials

Description: Aluminum was deposited onto both Teflon AF and Parylene AF surfaces by chemical vapor deposition of trimethylaluminum. This work shows that similar thin film (100 Angstroms) aluminum oxide adlayers form on both polymers at the low temperature dosing conditions used in the studies. Upon anneal to room temperature and above, defluorination of the polymer surfaces increased and resulted in fluorinated aluminum oxide adlayers; the adlayers were thermally stable to the highest temperatures tested (6… more
Date: December 2008
Creator: Martini, David M.
Partner: UNT Libraries
open access

Affordances of External Representations in Instructional Design: The Effect of Narrative and Imagery in Learning.

Description: Consisting of both theoretical and empirical inquires, this study examines the primary functions of narrative and the relationship between narrative and mental imagery. The study proposes a new framework to interpret semiotic resources. Combining this with the linguistic functional theory of Halliday (1978), a functional method to empirically investigate semiotic representations was also developed. In the empirical inquiry, the study developed a latent construct method to empirically test the … more
Date: December 2008
Creator: Wu, Yan
Partner: UNT Libraries
open access

Examining an eating disorder model with African American women.

Description: In the current study, I examined the general sociocultural model of eating disorders that suggests that sociocultural pressures leads to internalization, which in turn leads to body dissatisfaction and ultimately disordered eating. Because I am testing this model with a sample of African American women, I also am including acculturation as a variable of interest. Specifically, I hypothesized that (a) the experience of more societal pressure to be thin will be related to greater internalization,… more
Date: December 2008
Creator: Wood, Nikel Ayanna Rogers
Partner: UNT Libraries
open access

The representation of national political freedom on web interface design: A comparison of government-based and business-oriented websites.

Description: The purpose of this study is to explore the representation of national political freedom on web interface design by using power distance, one of the culture dimensions identified by Geert Hofstede, as a measurement. This study also aims to determine if there are any differences between government-based websites and business-oriented websites in representing national political freedom. A pilot study was conducted to validate ten power distance indicators identified from previous research on cul… more
Date: December 2008
Creator: Li, Rowena Liu-ping
Partner: UNT Libraries
open access

The Saxophone Music of Frederick Fox: An Annotated Bibliography with an Analysis of S.A.X. for Solo Alto Saxophone and Saxophone Quartet

Description: Frederick Fox's contributions to contemporary music are substantial, including eighty-three compositions written between 1966 and 1998. These include pieces for orchestra, wind ensemble, choir, solo instruments, and a variety of chamber ensembles. This study serves as a complete annotated bibliography of Frederick Fox's eight compositions which feature the saxophone in a prominent role, all of which were written between 1979 and 1998. They include a piece for unaccompanied solo alto saxophone, … more
Date: December 2008
Creator: Miller, Gregory E.
Partner: UNT Libraries
open access

The role of federal district courts on desegregation: A logistic regression analysis of the factors that influence prodesegregation outcomes.

Description: In this study I analyzed the 1089 desegregation outcomes in federal district courts that occurred between 1994 and 2004 in order to identify a) the legal and non-legal factors in the litigation process that predict pro-desegregation outcomes and b) the judicial patterns that impact the future of desegregation policy. Twenty-one legal and non-legal variables were analyzed via logistic regression analysis to identify factors that predict pro-desegregation outcomes. Only three predictor variable… more
Date: December 2008
Creator: Lane, Ginny G.
Partner: UNT Libraries
open access

The transformative library: A narrative inquiry into the outcomes of information use.

Description: This qualitative study uses narrative analysis to explore the outcomes of information seeking and use among public library users. Twelve women between the ages of 51 and 72, all residents of Fayetteville, Arkansas who self-identified as regular library users, were interviewed to gather their life stories and their experiences using the public library. The participants in this study used information to enable learning and, often, a change in their affective state. The participants used the new … more
Date: December 2008
Creator: Kenney, Brian
Partner: UNT Libraries
open access

A value-added approach to determine the relationships of mentoring to novice teacher classroom effectiveness.

Description: The purpose of the study was to determine the relationship between scores of the new teachers' classroom effectiveness with numerical indexes of mentor support, mentor infrastructure, and workplace ecology. In addition, this study sought to determine the effect of various demographics (i.e., gender, age, race, degree, teaching level, and certification route) on the Classroom Effectiveness Index (CEI) scores of first-year teachers, and to determine the differences, if any, between the Classroom … more
Date: December 2008
Creator: Harris, Shelley B.
Partner: UNT Libraries
open access

Neurocognitive implications of diabetes on dementia as measured by an extensive neuropsychological battery.

Description: Diabetes is a disease with a deleterious pathology that currently impacts 4.5 million individuals within the United States. This study examined the ability of a specific neuropsychological battery to identify and classify dementia type, investigated the impact of diabetes on cognition and analyzed the ability of the memory measures of the 7 Minute Screen (7MS) and the Rey-Osterrieth Recall to correctly categorize dementia type when not used in combination with a full battery. The battery in add… more
Date: December 2008
Creator: Harris, Rebekah Lynn
Partner: UNT Libraries
open access

Exploration of hierarchical leadership and connectivity in neural networks in vitro.

Description: Living neural networks are capable of processing information much faster than a modern computer, despite running at significantly lower clock speeds. Therefore, understanding the mechanisms neural networks utilize is an issue of substantial importance. Neuronal interaction dynamics were studied using histiotypic networks growing on microelectrode arrays in vitro. Hierarchical relationships were explored using bursting (when many neurons fire in a short time frame) dynamics, pairwise neuronal a… more
Date: December 2008
Creator: Ham, Michael I.
Partner: UNT Libraries
open access

Genetic and Cellular Analysis of Anoxia-Induced Cell Cycle Arrest in Caenorhabditis elegans

Description: The soil-nematode Caenorhabditis elegans survives oxygen deprivation (anoxia < 0.001 kPa of O2, 0% O2) by entering into a state of suspended animation during which cell cycle progression at interphase, prophase and metaphase stage of mitosis is arrested. I conducted cell biological characterization of embryos exposed to various anoxia exposure times, to demonstrate the requirement and functional role of spindle checkpoint gene san-1 during brief anoxia exposure. I conducted a synthetic lethal s… more
Date: December 2008
Creator: Hajeri, Vinita A.
Partner: UNT Libraries
open access

The Effect of Ethnicity on the Age-of-onset of the Male Voice Change.

Description: The purposes of this study were to describe the characteristics of the changing male voice in 4th, 5th and 6th grade students using Cooksey's maturation stages and, to compare the age-of-onset of the male voice change in African American, White, and Hispanic male students. Participants included volunteer 4th (n = 61), 5th (n = 73), and 6th grade male students (n = 63) from 2 urban elementary schools, 5 suburban elementary schools, 1 suburban middle school and 1 urban middle school in the North … more
Date: December 2008
Creator: Fisher, Ryan Austin
Partner: UNT Libraries
open access

An item response theory analysis of the Rey Osterrieth Complex Figure Task.

Description: The Rey-Osterrieth Complex Figure Task (ROCFT) has been a standard in neuropsychological assessment for six decades. Many researchers have contributed administration procedures, additional scoring systems and normative data to improve its utility. Despite the abundance of research, the original 36-point scoring system still reigns among clinicians despite documented problems with ceiling and floor effects and poor discrimination between levels of impairment. This study is an attempt to provide … more
Date: December 2008
Creator: Everitt, Alaina
Partner: UNT Libraries
open access

Television viewing habits of Christians.

Description: This dissertation examines possible differences in media habits and tastes between Christians and non-Christians. The study utilizes data from singles Internet personal advertisements to determine whether or not Christians, especially those with high levels of religiosity or who may be part of the Christian Right, have different television viewing patterns. Three models were developed using multivariate data analysis and logistic regression to examine Christians' television viewing habits reg… more
Date: December 2008
Creator: Dutke, Linda Jean
Partner: UNT Libraries
open access

The Impact of Visceral Influences on Consumers' Evaluation of Weight Loss Advertising

Description: The weight loss industry has come under fire from the Federal Trade Commission (FTC) in recent years due to consumer claims that many firms, marketing weight loss products, are using advertisements in an attempt to deceive consumers. Illegitimate weight loss claims have created so much concern that a White Paper call-to-action to investigate misleading weight loss advertisements has been filed. Despite recent interest, little attention has been garnered concerning the understanding of why cons… more
Date: May 2008
Creator: Amos, Clinton L.
Partner: UNT Libraries
open access

The Effects of Interactive Reviews and Learning Style on Student Learning Outcomes at a Texas State University

Description: This study investigated the effects of interactive lessons and learning style on student learning outcomes in self-defense education classes. The study utilized an experimental design that incorporated four self-defense education classes at the University of North Texas (UNT) during the fall semester 2007 (N = 87). A pre-test was administered during the first week of class to determine prior knowledge of the participants. The Visual Auditory Reading/Kinesthetic Inventory (VARK) was used to asse… more
Date: May 2008
Creator: Adams, Wesley
Partner: UNT Libraries
open access

Perturbation of renewal processes

Description: Renewal theory began development in the early 1940s, as the need for it in the industrial engineering sub-discipline operations research had risen. In time, the theory found applications in many stochastic processes. In this thesis I investigated the effect of seasonal effects on Poisson and non-Poisson renewal processes in the form of perturbations. It was determined that the statistical analysis methods developed at UNT Center for Nonlinear Science can be used to detect the effects of seasona… more
Date: May 2008
Creator: Akin, Osman Caglar
Partner: UNT Libraries
open access

Critical Theory and Preservice Art Education: One Art Teacher Educator's Journey of Equipping Art Teachers for Inclusion.

Description: This qualitative action research study examines how critical theory defined and guided my practice as an art teacher educator while I provided inclusion training for seven preservice art teachers during their student teaching. Sources of data included a personal journal, the inclusion curriculum I created for the preservice teachers and questionnaires and interviews. Primary findings indicated that critical theory had a substantive impact on the evolving development of my teaching philosophy, i… more
Date: May 2008
Creator: Allison, Amanda
Partner: UNT Libraries
open access

An Analysis of the Emotional Intelligence and Personality of Principals Leading Professional Learning Communities

Description: The purpose of this study was to investigate the relationship between a principal's emotional intelligence and personality and his or her ability to implement and develop professional learning communities within the school. The Professional Learning Community Assessment (PLCA) was administered to principals and teachers in 13 schools in Texas ranging from elementary to high school. Based on the strength of the PLCA scores, two elementary schools were selected to participate in case study resear… more
Date: May 2008
Creator: Jackson, Christopher
Partner: UNT Libraries
open access

Influence of pre and post testing on return on investment calculations in training and development.

Description: When expenses become an issue, training is often one of the first budget items to be cut. There have been a number of evaluation studies about rates of return from training interventions. Most results are based on interviewing participants about the value of the intervention and its effect on their productivity. This often results in quadruple digit return on investment indications. Decision makers who control the budget often view these kinds of results with skepticism. This study proposes a … more
Date: May 2008
Creator: Hiraoka, Calvin H.
Partner: UNT Libraries
open access

Negotiation, communication, and decision strategies used by hostage/crisis negotiators.

Description: By conducting this theory-based empirical study, gathering data from working negotiators in the US and Canada, I have determined what primary dynamic activities, communication skills, and negotiation tools are used by hostage/crisis negotiators. Negotiators implement their negotiation and decision strategies differently depending on whether the situations they deal with are instrumental or expressive. I have determined which elements of negotiations and factors affecting negotiations differ whi… more
Date: May 2008
Creator: Hancerli, Suleyman
Partner: UNT Libraries
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